Battery Thermal Management System Market Size & Share 2026-2035

Battery Thermal Management System Market Size

The battery thermal management system (BTMS) market was valued at $4.2 billion in 2025 to $13.2 billion by 2035, representing an approximately 12.7% CAGR. Demand is being shaped by a simultaneous rise in electric-vehicle volumes, battery-pack energy content, charging power, and safety requirements.

BTMS has consequently moved beyond a cooling-component purchase into an architecture decision spanning battery packs, power electronics, cabin HVAC, controls, sensors, and enclosure materials.

Liquid cooling remains the principal solution for high-energy BEVs and fast-charging PHEVs because it can maintain the heat-rejection performance needed during charging and high-load operation. Engineering studies place liquid systems at roughly one to two orders of magnitude higher convective heat-transfer coefficients than forced-air systems; active liquid architectures can reject approximately 3 kW during normal driving and up to 15 kW during DC fast charging while maintaining battery cells in the 20–40°C operating range ^{[1]University of Birmingham - Thermal Management Challenges of Li-Ion Battery Packs Using Partial Immersion Cooling - more.bham.ac.uk}. This capability raises the value of cooling plates, chillers, pumps, control software, and thermal interface materials as battery packs become more structurally integrated.

Safety regulation is increasing the minimum functional content of BTMS. China's GB 38031-2025, effective in July 2026, requires battery systems to avoid fire or explosion for at least 120 minutes after thermal runaway and adds fast-charging-cycle and thermal-event requirements ^{[2]ADT Media - Understanding China's GB 38031-2025 - adt.media}. UNECE R100 Revision 5 introduces an Annex 9K thermal-propagation test and warning requirements for battery thermal events. In the United States, FMVSS No. 305a updates post-crash electrical-safety requirements for electric powertrains, affecting pack sealing, electrolyte containment, and thermal-system integration. These rules turn sensing, thermal propagation management, and control redundancy into qualification requirements rather than optional system upgrades.

The market's technical center of gravity is shifting toward integrated thermal loops. Valeo and TotalEnergies are extending their collaboration from dielectric immersion cooling trials to a single-fluid thermal-management concept for next-generation EVs. Infineon's HybridPACK portfolio illustrates the parallel pressure on inverter thermal design, including double-sided cooling and silicon-carbide power modules designed for operating temperatures up to 175°C. The resulting procurement opportunity is increasingly defined by the supplier's ability to coordinate battery, inverter, motor, and cabin loads without imposing excessive parasitic energy consumption or validation burden on the OEM.

Regulation also changes the economics of standardization. A platform that meets China's extended post-runaway containment requirement, UNECE propagation testing, and North American crash-safety constraints can reduce OEM engineering duplication across regions. That favors globally validated Tier 1 integrators, but it also leaves room for materials specialists in cooling plates, TIMs, insulation, and semiconductor control hardware where the technical specification is becoming more demanding.

The market covers active, passive, and hybrid BTMS technologies used across passenger and commercial electric and hybrid vehicles. Coverage includes cooling plates, heat exchangers, pumps and compressors, fans, thermal sensors, TIMs, containment-related components, battery chemistries, propulsion systems, and battery-capacity classes across North America, Europe, Asia Pacific, Latin America, and the Middle East & Africa.

Key Drivers

EV volume growth and commercial-vehicle electrification

Global electric-car sales exceeded 17 million in 2024, accounting for more than one-fifth of new-car sales; sales continued to rise in early 2025 ^{[3]International Energy Agency - Trends in Electric Car Markets, Global EV Outlook 2025 - iea.org}. China accounted for more than 11 million electric-car sales in 2024, creating the largest installed base for battery cooling, heating, and safety systems. Each additional EV does not create equal BTMS demand: larger packs, higher utilization, and faster charging raise thermal-system content disproportionately.

Commercial vehicles intensify this effect. Electric buses and heavy trucks carry substantially larger batteries than passenger vehicles and must hold thermal performance through continuous duty cycles. European zero-emission heavy-duty registrations reached more than 23,700 in 2025, while zero-emission buses reached a 24.8% share of registrations. Fleet duty cycles make battery temperature management directly relevant to route reliability, charging turnaround, and usable range, supporting the commercial-vehicle segment's 14.1% CAGR.

Higher pack energy, charge power, and system integration

The expansion of 800V platforms and higher-power charging requires tighter temperature uniformity during charging and discharge. Hanon Systems' fourth-generation heat-pump system, deployed in the Kia EV3, recovers heat from the motor, battery, and ambient air in parallel to control battery and cabin loads across a wider operating range. MAHLE's thermal-management module orders, totaling approximately €1.5 billion, demonstrate OEM demand for assemblies combining battery cooling, power-electronics cooling, powertrain thermal control, and cabin conditioning.

Integrated systems can improve vehicle-level economics even when the module itself carries a higher price. Fewer hoses, connectors, and control interfaces can reduce assembly complexity and improve fault diagnosis. The trade-off is a more demanding supplier-qualification process because failure modes are no longer isolated within a single subsystem.

Safety and thermal-propagation requirements

Battery safety regulation directs spending toward more than cooling capacity. GB 38031-2025 requires enhanced thermal-runaway testing, while UNECE R100 Revision 5 emphasizes propagation testing and occupant warning. The relevant design response includes faster sensor feedback, more capable battery-control software, propagation-resistant interfaces, and cooling architectures that can manage abnormal heat loads as well as ordinary drive-cycle loads.

India adds a separate demand channel through AIS-038 and AIS-156 battery-safety requirements, while the PM E-DRIVE program conditions incentive eligibility on regulatory compliance. These measures support local EV deployment but also increase the importance of designs that can be adapted to regional testing protocols without extensive hardware redesign.

Advancement in cooling media and thermal materials

Nidec AMEC demonstrated an R290-based integrated EV thermal-management module at IAA Mobility 2025 with 8 kW each of battery cooling, cabin cooling, and cabin heating across a −20°C to +60°C ambient range. The development indicates growing interest in refrigerant-based architectures where an OEM seeks to consolidate battery and cabin thermal loads.

Passive and hybrid systems are also gaining technical relevance. Composite phase-change materials with bidirectional thermal conductivity have improved temperature uniformity in battery test configurations. These materials do not displace active cooling in high-load BEVs, but they can buffer transient heat during charging and reduce compressor cycling when paired with liquid circuits.

Key Restraints

Cost pressure in mass-market architectures

The thermal system competes with batteries, power electronics, and software for vehicle bill-of-materials budget. Active liquid, refrigerant-direct, and immersion systems require pumps, valves, heat exchangers, coolant circuits, control hardware, and validation; lower-cost HEVs and smaller PHEVs can therefore retain air-cooled or simplified liquid designs. This constraint is especially material in India, Brazil, Southeast Asia, and other markets where affordability limits the price premium an OEM can recover.

TIMs illustrate the tension between technical need and cost. Cell-to-pack designs increase the importance of reliable heat-transfer interfaces, yet they also increase material area and assembly sensitivity. Dow expanded VORATRON polyurethane thermally conductive adhesive and gap-filler capacity tenfold in Ahlen, Germany in May 2024, and later partnered with Carbice on carbon-nanotube–silicone hybrid TIM pads for e-mobility ^{[4]Dow - Commercial Operations of VORATRON Adhesive and Gap-Filler Capacity - corporate.dow.com}. 3M maintains EV TIM products for cooling plates, inverters, and power electronics, while Henkel introduced dedicated silicone-free gap-filler and polyurethane adhesive products for EV battery thermal management in May 2026. These investments validate material demand, but adoption remains contingent on qualification cost and pack-manufacturing economics.

Integration, validation, and service complexity

An integrated EV thermal architecture must allocate limited cooling and heating capacity among the battery, inverter, motor, cabin, and charging event. Magna identifies the challenge of simultaneously managing high ambient temperature, cabin-cooling demand, and fast charging. A solution optimized for one load can compromise another if coolant routing, controls, compressor capacity, or sensor calibration are not designed at platform level.

Cell-to-pack and cell-to-chassis construction increases this complexity. Cooling plates and structural members become more closely coupled, making leakage, contact degradation, and thermal non-uniformity more consequential. New suppliers can develop individual components, but established integrators retain an advantage where the OEM requires multi-system validation, failure-mode analysis, and field-service capability.

The most credible route to reducing system cost is not indiscriminate component simplification. It is integration that removes redundant circuits, connectors, and calibration work without weakening safety performance. MAHLE's major module orders and Hanon's multi-source heat-recovery design show why OEMs are willing to adopt higher-value modules when they reduce vehicle-level engineering burden. Suppliers unable to demonstrate that system-level value will face pressure as liquid-cooling hardware itself becomes more widely available.

Battery Thermal Management System Market Segment Analysis

By Cooling Method

Active System - $1.968B in 2025 to $5.701B by 2035, 11.6% CAGR

Active cooling includes liquid, refrigerant-based, and localized thermoelectric solutions. It is the baseline architecture for high-capacity BEVs and fast-charge-capable PHEVs because it can reject heat across normal driving and charging loads within a controlled battery-temperature window. Liquid systems remain the volume foundation because their components are widely manufacturable and adaptable to multiple pack geometries.

Refrigerant-based cooling is a higher-complexity option where integration with HVAC can provide compactness and stronger transient cooling. Valeo states that its refrigerant battery cooler can provide more than 30% higher cooling power than comparable liquid-cooled solutions for medium-sized packs ^{[5]Valeo - Refrigerant Battery Cooler - valeo.com}. Thermoelectric systems remain limited to localized applications because their efficiency is not competitive at pack-scale heat loads.

Passive System - $1.287B in 2025 to $4.644B by 2035, 14.1% CAGR

Passive systems record the fastest cooling-method growth because they address lower-power and cost-sensitive applications. Air cooling remains relevant in HEVs and smaller battery systems, while PCM-based configurations can absorb short-duration heat spikes without continuous compressor demand. Experimental PCM studies show that conductive fillers and structured material design can improve both maximum temperature control and cell-to-cell uniformity.

The category's growth should not be read as a wholesale replacement of liquid cooling. Passive solutions are most commercially attractive where duty cycle, pack capacity, and ambient conditions permit lower-cost thermal control. Their principal strategic role is as a complement to active systems in hybrid architectures and constrained vehicle packages.

Hybrid System - $0.896B in 2025 to $2.882B by 2035, 12.8% CAGR

Hybrid BTMS combines active liquid or refrigerant cooling with passive buffers such as PCM. The design objective is load leveling: passive material absorbs a short heat spike, while the active loop manages sustained heat rejection. Dual-layer PCM configurations can extend the useful thermal-buffering range by combining materials with different phase-transition temperatures.

Hybrid systems are particularly relevant for vehicles exposed to irregular charging or high ambient variation. Their limitation is added material, packaging, and controls complexity; suppliers must demonstrate that reduced compressor cycling and improved temperature uniformity outweigh those costs.

By Component

Cooling Plates - $1.322B in 2025 to $4.728B by 2035, 14.0% CAGR

Cooling plates are the principal heat-transfer interface between battery cells and the coolant loop. Their growth reflects the move toward direct cell cooling and cell-to-pack construction, which increases the importance of low pressure drop, consistent cell contact, and manufacturable aluminum-channel designs. MAHLE's bionic cooling-plate development emphasizes more uniform coolant distribution and reduced pressure drop.

Heat Exchangers - $1.007B in 2025 to $2.996B by 2035, 11.9% CAGR

Heat exchangers connect battery coolant circuits to refrigerant or ambient loops. Compact brazed-aluminum and plate-type designs remain central to thermal integration because they determine how effectively battery heat is transferred into the broader HVAC or radiator system. Their value rises when battery and cabin circuits are combined.

Pumps & Compressors - $0.668B in 2025 to $1.968B by 2035, 11.8% CAGR

Electric pumps and compressors determine cooling-loop responsiveness. Modine's EVantage electric compressors operate across 200V–850V DC and are designed for commercial EV duty conditions, demonstrating the broadening voltage and durability requirements for these components. BorgWarner's high-voltage coolant-heater awards for PHEV programs also reflect rising demand for controlled battery heating as well as cooling.

Fans & Blowers - $0.494B in 2025 to $1.443B by 2035, 11.7% CAGR

Fans and blowers continue to support air-cooled battery packs, radiators, and hybrid systems. They retain importance in smaller HEVs and cost-optimized vehicles, even as liquid cooling becomes dominant in high-power applications.

Thermal Sensors - $0.338B in 2025 to $0.814B by 2035, 9.5% CAGR

Thermal sensors support battery-state estimation, fault detection, and thermal-propagation response. Growth is moderated by increasing integration of sensing functions into modules and battery-control systems. Infineon's power modules incorporate temperature-monitoring capability, reducing the need for discrete sensing hardware in some inverter applications.

Thermal Interface Materials - $0.245B in 2025 to $1.020B by 2035, 15.6% CAGR

TIMs are the fastest-growing component category. The move toward cell-to-pack construction increases the need for controlled heat transfer between cells, cooling plates, structural members, and power electronics. Supplier investment by Dow, Carbice, 3M, and Henkel reflects the material opportunity, particularly in gap fillers, adhesives, and pad systems designed for high-voltage battery packs.

Others - $0.078B in 2025 to $0.258B by 2035, 13.1% CAGR

This category includes valves, thermal-runaway detection systems, fuses, protective enclosure materials, and propagation-control components. The category benefits from requirements that focus on thermal-event management, not only normal operating temperature.

By Vehicle

Passenger Vehicles - $3.140B in 2025 to $9.569B by 2035, 12.2% CAGR

Passenger vehicles remain the market's largest application because they account for most global EV volume. SUVs and larger premium vehicles generate greater BTMS value per unit because their batteries, charging rates, and multi-zone cooling requirements are more demanding. Sedans and compact vehicles create volume demand but place stronger pressure on system cost.

Commercial Vehicles - $1.011B in 2025 to $3.659B by 2035, 14.1% CAGR

Commercial vehicles grow faster because thermal-system requirements are tied to high utilization, large packs, and route reliability. Modine's thermal-system supply for GILLIG hybrid-electric buses and Webasto's scalable eBTM system illustrate the need for battery heating and cooling architectures built for transit, delivery, and heavy-duty duty cycles.

By Battery

Lithium-Ion Battery - $2.936B in 2025 to $8.548B by 2035, 11.6% CAGR

Lithium-ion remains the largest battery application. Global battery demand is expected to rise materially through 2035 as EV deployment expands, sustaining demand for cooling, heating, monitoring, and propagation-control systems. LFP's expanding role adds a control challenge because its flatter voltage curve increases the value of accurate temperature and battery-state monitoring.

Nickel-Metal Hydride Battery - $0.680B in 2025 to $2.788B by 2035, 15.5% CAGR

NiMH growth is linked to continued HEV production, especially in Asia and North America. Smaller battery sizes permit air or simplified liquid cooling, but repeated hybrid drive cycles still require thermal control to limit capacity degradation.

Lead-Acid Battery - $0.362B in 2025 to $1.325B by 2035, 14.2% CAGR

Lead-acid BTMS demand is concentrated in 48V mild-hybrid and specialty applications. The segment remains relevant where cost, established supply chains, and limited battery energy requirements outweigh energy-density constraints.

Solid-State Battery - $0.174B in 2025 to $0.566B by 2035, 12.9% CAGR

Solid-state batteries may reduce some heat-generation mechanisms at moderate loads, but high-power charging and cold-weather operation retain thermal-management requirements. Research on ultra-high-frequency self-heating shows that targeted thermal control can materially affect low-temperature solid-state battery operation ^{[6]Joule - Solid-State Batteries Enabled by Ultra-High-Frequency Self-Heating - cell.com}. The segment's growth reflects early commercialization rather than broad automotive volume deployment.

By Propulsion

Battery Electric Vehicles - $2.472B in 2025 to $7.200B by 2035, 11.6% CAGR

BEVs require the most comprehensive BTMS because the traction battery provides propulsion and auxiliary energy without engine waste heat. Thermal efficiency directly affects charging speed, cold-weather performance, and driving range.

Plug-In Hybrid Electric Vehicles - $1.039B in 2025 to $3.878B by 2035, 14.4% CAGR

PHEVs post the fastest propulsion CAGR. Their thermal systems must manage both battery-electric operation and interaction with engine heat sources. BorgWarner's awarded high-voltage coolant-heater programs across PHEV SUVs, pickups, minivans, and light trucks demonstrate continuing demand for battery heating in diverse hybrid formats.

Hybrid Electric Vehicles - $0.641B in 2025 to $2.150B by 2035, 13.2% CAGR

HEVs use smaller packs and generally simpler BTMS architectures. They remain an important channel where charging infrastructure, affordability, or consumer preference slows pure-BEV adoption.

By Battery Capacity

Below 100 kWh

This category includes small BEVs, PHEVs, and HEVs. Cost-efficient liquid or air cooling dominates, with design priorities centered on affordability, broad climate tolerance, and high-volume manufacturability.

100–200 kWh

Mid-range BEVs, SUVs, light commercial vehicles, and larger passenger vehicles typically use active liquid cooling and increasingly combine it with heat-pump functions. This capacity band is a key adoption zone for 800V systems and higher-power charging.

200–500 kWh

Heavy commercial vehicles, transit buses, and large high-performance vehicles require multi-zone cooling, larger heat exchangers, and robust controls. Thermal efficiency has direct operating implications because cooling-energy use can reduce daily route range.

Above 500 kWh

Heavy trucks, rail applications, and stationary storage require scalable systems that approach industrial thermal-management duty. Webasto's modular eBTM configuration illustrates the use of multiple units for larger battery banks.

This diversity limits the value of a single-product strategy. Cooling-plate suppliers need material and sealing expertise; control suppliers need safety and calibration capability; commercial-vehicle specialists need high-capacity heating and cooling experience. The most resilient suppliers will use common components and software across multiple vehicle and battery segments while preserving enough modularity to meet markedly different pack sizes and duty cycles.

Battery Thermal Management System Market Regional Analysis

North America

The United States represents $0.631 billion in 2025 and is projected to reach $2.039 billion by 2035. EV sales reached approximately 1.6 million in 2024, while FMVSS No. 305a adds a national safety reference point for electric-powertrain design. BorgWarner's domestic high-voltage coolant-heater production in Michigan reflects a localization opportunity for North American EV thermal components. Dana's Power Technologies business, which includes thermal-management offerings, reported approximately $1.301 billion in 2024 sales.

Canada and Mexico account for $0.256 billion in 2025 and are projected to reach $0.912 billion by 2035. Canada's alignment with North American vehicle-safety requirements supports common platform design. Mexico's manufacturing role under USMCA makes it significant for component localization, even where final vehicle demand is concentrated elsewhere in the region.

Europe

Germany represents $0.192 billion in 2025 and is forecast to reach $0.539 billion by 2035. It remains a major supplier hub for Continental, Bosch, Infineon, MAHLE, and Webasto. Germany's electrically chargeable truck registrations rose 57.4% in 2024, supporting commercial-vehicle thermal demand ^{[7]PZPM/ACEA - New Commercial Vehicle Registrations in 2024 - pzpm.org.pl}.

The rest of Europe represents $0.717 billion in 2025 and is projected to reach $2.277 billion by 2035. EU heavy-duty CO2 standards require emissions reductions of 15% by 2025 and 45% by 2030 from the 2019 baseline, reinforcing fleet electrification demand. The United Kingdom, Nordic countries, France, Italy, Spain, Belgium, and the Netherlands differ in EV adoption pace, but they share the need for thermal systems that protect range and charging performance in colder climates and dense urban duty cycles.

Asia Pacific

China is the largest national market at $1.109 billion in 2025, rising to $3.311 billion by 2035. The country's EV scale creates volume demand, while GB 38031-2025 raises the performance threshold for thermal-propagation management and fast-charging safety. China's zero-emission heavy-duty vehicle share reached 29% in 2025, adding a high-content commercial BTMS channel.

The rest of Asia Pacific rises from $0.895 billion in 2025 to $3.127 billion by 2035. In Japan, DENSO's Zenmyo Plant expansion is scheduled to begin construction in the first half of fiscal year 2025, with completion in January 2027 and production planned for the first half of fiscal year 2028; the approximately ¥69 billion investment supports next-generation electrification products ^{[8]DENSO - Expansion of Zenmyo Plant for Electrification Products - denso.com}. South Korea is a major source of advanced heat-pump and 800V thermal-system development, illustrated by Hanon's Kia EV3 deployment. India combines rising EV demand with AIS-038, AIS-156, and PM E-DRIVE compliance requirements. Vietnam, Indonesia, Australia, and Singapore add varied demand profiles ranging from two-wheelers to premium passenger EVs.

Latin America

Brazil rises from $0.090 billion in 2025 to $0.298 billion by 2035. Its high ambient temperatures and expanding EV base favor active cooling, particularly for vehicles exposed to sustained solar load and urban congestion. Brazil recorded nearly 125,000 EV sales in 2024.

The rest of Latin America, including Mexico and Argentina, grows from $0.127 billion to $0.446 billion. Mexico's automotive-manufacturing footprint creates a dual opportunity in component production and EV assembly, while the region's low current base supports a higher rate of expansion.

Middle East & Africa

The UAE rises from $0.033 billion in 2025 to $0.066 billion by 2035. High ambient temperatures impose a demanding thermal-control requirement because BTMS must manage both battery-generated heat and solar-driven cabin and enclosure loads. This supports premium active systems but does not offset the region's smaller EV volume.

The rest of the Middle East & Africa, including Saudi Arabia and South Africa, rises from $0.101 billion to $0.212 billion. Lower charging-infrastructure density and slower EV adoption constrain volume growth, although hot-climate operating conditions make thermal performance strategically important where electrification occurs.

North America and Europe offer a different demand mix: qualification standards, commercial-fleet mandates, and localized production create opportunities for high-value integrated systems. Latin America and parts of Asia Pacific grow faster from lower bases but require product designs that can meet lower vehicle-price points. Suppliers that invest only in premium 800V architectures risk missing this volume; suppliers focused solely on low-cost systems may struggle to meet the safety and integration requirements of mature EV markets.

Battery Thermal Management System Market Share & Competitive Landscape

The competitive landscape is led by system integrators with global OEM relationships, manufacturing scale, thermal-controls capability, and the ability to combine cooling hardware with vehicle electronics. Robert Bosch holds an estimated 12.3% 2025 market share, Continental approximately 8.2%, Valeo approximately 6.1%, Dana approximately 2.9%, Infineon approximately 2.0%, MAHLE approximately 1.6%, and Hanon Systems approximately 1.0%. The balance of the market remains dispersed among global specialists, regional suppliers, and component manufacturers.

BorgWarner competes through high-voltage coolant heaters and electrified powertrain components. Its 400V and 800V eHeater awards for PHEV platforms extend its position beyond BEV battery heating into hybrid applications that must operate across highly variable thermal conditions. BorgWarner also showcased LFP batteries, power electronics, and thermal-management solutions at Bharat Mobility Global Expo 2025, signaling continued interest in India's electrification supply chain.

Continental combines battery monitoring, sensing, and automotive thermal-management capability. Its 2024 Automotive segment revenue base provides scale for EV-system development, while its sensor and battery-protection offerings position the company at the interface of BTMS controls and safety functions.

Dana supplies battery and electronics cooling, thermal-acoustic shielding, sealing, and electrified propulsion systems. Its Power Technologies segment generated approximately $1.301 billion in 2024 revenue, giving Dana a meaningful operating base in thermal and electrification products. The company's competitive position is strongest where the customer values thermal management alongside seals, driveline integration, and industrial-grade durability.

DENSO brings deep Japanese OEM relationships, thermal-system manufacturing, and battery-electronics capability. The Zenmyo Plant investment expands capacity for electrification products, while DENSO's battery-heating and vehicle-thermal-management patents show a continuing focus on integrated thermal circuits. The company's cell-supervising and shunt-current-sensor products for Toyota's bZ4X demonstrate how battery temperature measurement and control increasingly converge.

Hitachi Astemo-now Astemo, Ltd.-is a Japan-headquartered electrification supplier serving approximately 70 automobile and motorcycle manufacturers with motors, inverters, battery-management systems, and e-Axle assemblies ^{[9]Astemo - Corporate Profile and Financial Highlights - astemo.com}. Its Battery Control Unit combines charge/discharge management, cell balancing, high-voltage switching, and cooling control in a resin-body design with built-in cell-voltage sensing; the unit is designed to ISO 26262 ASIL-D functional-safety requirements. This integration gives Astemo a practical BTMS role in connecting pack-state estimation with cooling-circuit activation.

Astemo's total thermal-management approach for xHEVs links isolated cooling circuits for motors, inverters, and other electric devices with engine-coolant and climate-control loops. Its inverter development further illustrates the thermal-management focus: third-generation units use double-sided cooling to reduce thermal resistance to half that of earlier designs, while fourth-generation inverters achieve approximately ten times the output density of first-generation designs. For 800V platforms, Astemo and Hitachi received Japan's 2022 Prime Minister Prize for laminated insulating-sheet technology that addresses insulation requirements without increasing thermal resistance.

The company's e-Axle orders from Honda for global rollout from 2026 and its motor-and-inverter supply arrangement with JATCO position its thermal-control capability within production drivetrain programs. Astemo also introduced a 12-inch air-cooled direct-drive in-wheel motor in May 2025, complementing larger oil-cooled designs. Its stated electrification-revenue target of more than ¥400 billion in fiscal year 2025, with an ambition to more than double by fiscal year 2030, indicates that thermal management is being developed as part of a larger electrified-system portfolio rather than as a standalone cooling business.

Hanon Systems is a Korean thermal-management specialist with a fourth-generation heat-pump system deployed in the Kia EV3. The system draws heat from the motor, battery, and ambient air in parallel, demonstrating its focus on integrated energy recovery rather than separate battery and cabin loops. Its patented heat-management architecture also supports its position in multi-circuit thermal systems.

Infineon Technologies participates primarily through power semiconductors and controls that determine inverter heat generation and thermal-monitoring requirements. Its HybridPACK Drive G2 Fusion combines silicon and SiC technologies, supports up to 220 kW in the 750V class, and is specified for a −40°C to +175°C operating range. Its supply of SiC modules to Xiaomi EV's SU7 underscores its exposure to China's high-voltage EV ecosystem.

MAHLE is advancing from individual components toward integrated thermal-management modules. Its approximately €1.5 billion in major module orders demonstrates customer demand for assemblies that combine battery, cabin, powertrain, and power-electronics thermal functions. MAHLE's cooling-plate work adds a component-level route to differentiation through coolant distribution and pressure-drop management.

Robert Bosch benefits from broad automotive-supplier scale, global manufacturing, and established OEM relationships. Bosch reported preliminary 2024 group sales of approximately €91.3 billion, providing the industrial base to serve thermal management as part of a broader mobility portfolio. Its Bosch Rexroth partnership with Modine extends thermal-management reach into electrified off-highway equipment.

Valeo has thermal-management experience across hybrid and BEV platforms, including battery coolers, compressors, heat pumps, and dielectric immersion-cooling development. Its partnership with TotalEnergies positions Valeo in next-generation single-fluid and immersive-cooling concepts. Valeo's 2024 sales of €21.5 billion provide scale for global OEM support.

Aisin Seiki (Aisin Corporation) supplies electric water pumps used for battery and inverter cooling in BEV and HEV applications. Its 2025 brazed-aluminum battery cooling plate demonstrates movement from thermal-flow components into the battery heat-transfer interface itself. The company's Toyota-group relationships support early integration into electrified drivetrain architectures.

Borgers is now part of Autoneum following the January 2023 acquisition of Borgers Automotive assets. Its relevance is thermal and acoustic insulation for vehicle bodies and battery enclosures, not active BTMS cooling. This positioning matters as thermal-propagation containment and NVH requirements increase, but it should not be conflated with the supply of pumps, plates, or refrigerant circuits.

Calsonic Kansei (Marelli) operates through the Marelli Group after the Calsonic Kansei–Magneti Marelli combination. Marelli introduced its Integrated Thermal Management Module in 2023, using an intelligent multi-way valve to manage up to six combinations among electric-drive, battery, and cabin circuits. Its Intelligent Energy Management system, unveiled at CTI Europe 2025, extends the company's focus from component-level thermal routing to coordination across thermal, propulsion, and electronics domains.

GKN Automotive addresses thermal management through eDrive integration rather than as a standalone battery-cooling supplier. Its 3-in-1 eDrive integrates motor, inverter, and transmission thermal management, including active oil-cooling circuits; the company has supplied more than 2.5 million electric drive units. Its 2023 eCrate concept offers 113 kW and 185 kW modular drive-unit options, illustrating an off-the-shelf approach to electric-drive integration.

Inalfa Roof Systems has an indirect, passive thermal-management role. Its thermal-control glass provides solar direct transmittance of 4–12%, reducing solar heat entering the cabin and thereby reducing battery-powered HVAC load. The company does not supply active battery cooling equipment, but passive solar-load reduction can benefit vehicle energy balance in hot climates.

Magna International contributes thermal-system engineering and validation capability. Its work on concurrent high-ambient, cabin-cooling, and fast-charging conditions illustrates the vehicle-level design challenge for integrated thermal architectures. Magna's relevance is strongest where OEMs seek broader body, battery-enclosure, and electrified-system integration.

Modine Manufacturing focuses on commercial EV thermal management through its EVantage portfolio. Its electric compressors and valves address high-voltage commercial applications, while its GILLIG bus-platform award provides a transit reference for integrated battery, traction-motor, and power-electronics cooling.

Nidec is expanding from motors into integrated thermal systems. Its Nidec AMEC R290 module combines battery, cabin-cooling, and heating functions in one refrigerant-based package. Nidec's e-drive partnership with Ashok Leyland adds commercial-vehicle relevance in India.

Thermo King brings transport-refrigeration experience to electric and hybrid buses. Its TE Series all-electric bus HVAC includes integral BTMS, avoiding the need for a separate thermal unit and second compressor. The Athenia ENVI R-744 CO₂ heat pump is designed for electric and hybrid buses across −25°C to +50°C, while the September 2025 TE Series Heat Pump launch targets up to 50% range extension in moderate conditions and 30% in cold conditions.

Webasto supplies scalable electrical battery thermal-management systems for buses, trucks, construction equipment, and light commercial vehicles. Its eBTM provides up to 8 kW of cooling and 10 kW of heating for 400V and 800V battery systems. Webasto's eVTM architecture expands the offering to heat pumps, high-voltage heaters, waste-heat recovery, and coordinated cabin-and-battery thermal management.

Recent Industry Developments

• September 2025 - Thermo King expands its all-electric high-efficiency bus series: Thermo King launched the TE Series Heat Pump for battery-electric buses, targeting range improvements of up to 50% in moderate temperatures and 30% in cold conditions.
• July 2025 - BorgWarner secures dual eHeater contracts for hybrid applications: BorgWarner won 400V and 800V high-voltage coolant-heater contracts from two global OEMs for PHEV programs scheduled for production from 2028.
• July 2025 - BorgWarner wins a dual-inverter project with a Chinese OEM: BorgWarner announced a dual-inverter supply award for hybrid vehicle platforms, with mass production expected by the end of 2025.
• May 2025 - Astemo introduces a 12-inch air-cooled in-wheel motor: Astemo unveiled a direct-drive motor system for small EVs and motorcycles, expanding its range of air- and oil-cooled electrification technologies.
• May 2025 - BorgWarner obtains a North American PHEV HVCH award: BorgWarner secured a 400V high-voltage coolant-heater contract for pickup, SUV, and minivan PHEV platforms, with production expected to begin in 2027.
• March 2025 - China releases GB 38031-2025: The new battery-safety standard established a 120-minute no-fire/no-explosion thermal-runaway requirement and additional fast-charging and thermal-event provisions, with implementation scheduled for July 2026.