Battery Thermal Management in India: A Deep Patent Field, Yet Few Explicit Players

What it is

A Battery Thermal Management System (BTMS) keeps a battery pack within its safe operating temperature window—typically 20°C to 45°C—by removing excess heat during fast charging or heavy discharge and warming cells in cold conditions. Without it, lithium-ion cells degrade faster, lose capacity, and risk thermal runaway, a chain reaction that can lead to fires.

BTMS can be passive (phase-change materials absorbing heat), active air-cooled (fans and ducts), or active liquid-cooled (a water-glycol mix pumped through cold plates or channels). Liquid cooling now dominates high-performance applications because it handles higher heat loads in a compact package, and it allows precise temperature uniformity across cells—critical for battery life and safety.

The value chain

• Upstream – Raw materials & chemicals: Aluminum, polymers, glycol-based coolants, phase-change materials, and thermal interface materials. Suppliers are largely global chemical and metals firms.
• Midstream – Component manufacturing: Cold plates, coolant channels, pumps, valves, sensors, heat exchangers, and thermal interface materials. Key global players include Modine, Parker Hannifin, and 3M (Market Research Future).
• Midstream – System integration: Design and assembly of complete BTMS modules for battery packs. Modine and startup Rovilus (500 Startups) are active here; Indian OEMs often integrate in-house.
• Downstream – Vehicle integration: BTMS is embedded into EV platforms by OEMs. In India, Ola Electric, Ather Energy, Matter Motor Works, and others design thermal management as part of their vehicle IP.
• End-use: Operation of EVs, grid storage, and consumer electronics. In India, OEMs account for 81% of the end-user segment for EV battery cooling systems (IMARC Group).

Where it's heading

• Integration of cold plates directly into the battery tray to cut part count and manufacturing steps (IDTechEx).
• Development of polymer-based flexible coolant channels that conform to cell shapes, eliminating the need for thermal interface material (IDTechEx).
• Liquid cooling adoption growing rapidly for high-performance EVs due to superior efficiency and compact design (LinkedIn article).
• Passive cooling (phase-change materials) still held a dominant 78.2% revenue share in the global EV BTMS market in 2024 (Grand View Research).
• Government incentives and low-carbon regulations are accelerating BTMS adoption, especially in India where FAME-II subsidies and state-level EV policies drive demand (BIS Research, IMARC Group).
• India’s EV battery cooling market is projected to grow from $138.20 million in 2025 to $469.81 million by 2034, a CAGR of 14.56%, with liquid cooling commanding a 44% share and South India leading regionally at 30% (IMARC Group).

The opportunity in India

Our data maps 545 patents to battery thermal management, and 39 startups hold at least one patent in the space. Yet only one company in our dataset—NexEV Solutions—explicitly references battery thermal management in its profile. This mismatch suggests that most patent activity sits inside EV OEMs (Ola, Ather, Matter, etc.) that develop thermal management as part of their integrated vehicle IP, not as standalone product lines.

The gap points to a white-space for independent BTMS component and system suppliers. As India’s EV battery cooling market heads toward $470 million by 2034 (IMARC Group), there is room for startups focused on liquid-cooling modules, thermal interface materials, compact chillers, and aftermarket thermal services. The broader energy sector has attracted $2.7 billion in funding across 365 companies, but capital specifically targeting thermal management startups remains thin—creating an opening for early movers.

India signal: patents, startups, capital

Our dataset matches 545 Indian patents to battery thermal management. Because of India’s ~18-month patent publication lag, the most recent filing years are understated, so the true stock is likely higher. Patent-holding startups number 39, led by Ola Electric (14 patents), Matter Motor Works (11), Exponent Energy (10), SimpleEnergy (6), Sun Mobility (4), and Ather Energy (3). These are predominantly EV OEMs that embed thermal IP into their vehicles.

In contrast, only one company in our data—NexEV Solutions, based in Bengaluru—explicitly describes itself as working on battery thermal management. This low count may partly reflect jargon mismatch, but it underscores that dedicated BTMS ventures are rare. The energy sector has seen $2.7 billion raised across 365 companies (median $1 million), yet none of the top-funded firms in the sector are pure-play thermal management startups. The patent depth signals a strong technical foundation; the company gap signals an untapped commercial opportunity.

In our data

Sources

• Battery Thermal Management System - an overview ↗
• Battery Thermal Management: Everything you need to know ↗
• How It Works: Battery Thermal Management System ↗
• The EV Battery Supply Chain Explained ↗
• Battery Thermal Management System Market for Mobility ... ↗
• Battery thermal management system market report 2024 ... ↗
• Electric Vehicle Battery Thermal Management Systems ... ↗
• Thermal Management Market Size, Share and Growth ... ↗