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By David Thomas
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David Thomas is a Thermal System Architecture Engineer at American Battery Solutions (ABS), where he specializes in designing and integrating battery thermal management systems for advanced energy solutions. With nearly 20 years of mechanical engineering experience, he focuses on analyzing, verifying and innovating thermal strategies that keep high-voltage battery systems efficient, reliable and safe.
When it comes to lithium-ion battery systems, thermal management is essential. Heat affects everything from performance to longevity; so, if a battery gets too hot or too cold, problems can start to show up.
At American Battery Solutions (ABS), my job is to design battery systems that manage heat the right way — quietly, reliably and consistently in the background — so customers can focus on getting work done. Here’s how we think about thermal management, what makes it challenging and where technology is headed.
When people hear “thermal management,” many might think of cooling plates or liquid lines. In reality, it’s much more layered than that.
We start with the basics: Choosing the right battery cells and sizing the pack, so it’s not being pushed beyond what it’s designed to do. From there, we design how the cells are arranged and supported, so heat spreads evenly and doesn’t build up in any one spot.
Next comes monitoring and control. Sensors track temperature, voltage and current in real time. If something starts drifting outside the safe range, the system can automatically dial things back — reducing power before heat becomes a problem.
Finally, there’s the thermal system itself, which can add or remove heat to keep the battery in its ideal operating window. All these layers work together to reduce stress on the battery, slow degradation and prevent rare but serious events like thermal runaway.
As batteries pack more power into smaller spaces, there’s more current — and heat rises quickly with current. That’s just physics.
In the past, you could solve heat problems by adding more metal, more coolant flow or bigger heat sinks. But as packaging gets tighter, those options aren’t always available. That forces engineers to get creative.
At ABS, that means improving heat exchangers, using materials that move heat more efficiently, reducing losses between components and relying more on smart software that anticipates problems before they happen. The goal is the same: Stable temperatures, without sacrificing energy density or space.
Thermal management at ABS is built around three layers:
For extreme cases, we also implement venting paths, fire-resistant barriers and propagation-resistant structures, so an issue stays localized rather than spreading through the pack.
Not all batteries work in the same conditions. For example, a mining vehicle operating underground faces very different challenges than a commercial fleet vehicle charging multiple times per day.
In harsh environments, systems can see high ambient temperatures, nonstop operation, vibration and dust. For those applications, we use reinforced cooling components, corrosion-resistant materials, higher coolant flow rates and redundant sensors.
Fleet applications often focus more on efficiency and fast charging. There, we prioritize lightweight cooling designs and software that adapts thermal behavior to changing duty cycles. The core principles stay the same, but the execution changes based on how the battery will be used.
Safety and efficiency don’t come from a single component. They come from how everything fits together.
In the ABS Proliance high-voltage battery series, we use materials that move heat efficiently where we want it to go — and block it where we don’t. Cooling plates and manifolds are designed to distribute coolant evenly, reducing hot spots across the pack.
On the software side, the BMS constantly adjusts how the battery operates, keeping temperatures in check without the user ever noticing. It’s a coordinated effort between materials, hardware and software working in tandem.
One advantage of modular battery design is consistency. When thermal strategies are proven at the module level, they can be repeated across larger systems with confidence.
Scalability allows cooling hardware — like manifolds and heat exchangers — to grow with the system without disrupting temperature balance. This reduces risk, simplifies customization and helps ensure standards are met as systems scale up or change.
There’s a misconception that thermal runaway is a regular occurrence. It is not — when systems are designed and monitored correctly, the risk is extremely low.
Another myth is that cooling alone makes a battery safe. Cooling is an important factor, but safety also depends on cell choice, mechanical design and control software.
Propagation protection is another area that’s often overlooked. Thermal management does more than prevent failure — it ensures a small problem doesn’t turn into a bigger one. That’s why ABS focuses on both passive protections, like barriers and insulation, and active controls that can detect issues early and isolate affected areas.
I see several trends shaping the future of battery thermal design:
In addition, some of the most promising improvements are happening at the cell level. New designs that reduce internal resistance — like tab-less cells — generate less heat and move it more efficiently, making faster charging possible with existing cooling approaches.
All these advancements point in the same direction: higher energy, better performance and stronger safety.
By combining smart design, proven materials and intelligent controls, our team at ABS builds battery systems that stay safe, efficient and reliable — no matter where they’re working or how hard they’re pushed.
Learn more about how ABS can help meet your energy needs by contacting us at americanbatterysolutions.com/contact.
Temperature directly affects a battery’s performance and lifespan. If a lithium-ion battery operates outside of its ideal temperature range, its efficiency drops and degradation accelerates. In extreme cases, unmanaged heat can contribute to safety events.
As batteries deliver more power in smaller spaces, higher current generates more heat. Engineers must balance thermal management with energy density, packaging constraints and performance demands.
Operating environment, duty cycle, ambient temperature, charging frequency and vibration all influence how much heat a battery generates and how it needs to be managed. Harsh or nonstop operating conditions increase thermal stress on the battery system.
ABS uses a combination of liquid cooling plates, optimized coolant flow paths, heat-transfer materials, continuous monitoring through the Battery Management System (BMS), and more! These components work together to keep temperatures stable and prevent localized hot spots.
Future systems will rely more on advanced material, new cooling approaches like dielectric fluids and smarter software that predicts thermal issues before they occur. These innovations support higher energy density, faster charging and improved safety.
