Reducing Battery Cell Damage in Packaging via NIR Preheating

Wed, 09 Sep 2026 14:19:10 +0800

Stop Crushing Your Battery Cells: A Better Way to Seal

Here is the problem with pressing battery cells during encapsulation: if your bonding materials are cold, they’re stubborn. To get a decent seal, you end up cranking up the mechanical pressure. But when you push that hard, things go wrong. You get structural deformation or, even worse, internal short circuits. Basically, you’re trying to force a bond that isn’t ready to happen, and the cell pays the price. We found a way around this using Near-Infrared (NIR) lamps. Instead of just smashing the parts together, we preheat the target area right before the press hits. How it actually works NIR isn’t like a space heater that just warms up the air. It targets specific absorption bands, meaning the radiation goes straight into the packaging material. It softens the adhesives and polymers almost instantly. Once that viscosity drops, you don’t need nearly as much force to get a perfect seal. You can dial back the pressure and stop worrying about crushing the cell casing. Getting the setup right Timing is everything here. You can’t have a heat source that takes forever to warm up, or your whole line slows down. That’s why we use NIR lamps—they hit full power basically the second you flip the switch. This makes it easy to sync the heat with the speed of your conveyor. The trick is finding the sweet spot. If you go too hot, you risk messing with the cell’s chemical stability. It’s all about balancing the wattage and the distance to make sure you don’t end up with any hot spots. The trade-offs Now, it’s not all magic. Adding a preheating stage means your machine takes up a bit more floor space. And then there’s the “heat soak.” Even though NIR is targeted, the surrounding housing is still going to get warm. You’ll want to put some thought into your cooling fans or heat sinks to keep the rest of the assembly from overheating. But honestly? It’s worth it. You move from a process based on brute force to one assisted by heat. You get a tighter seal and, more importantly, you stop scrapping expensive cells.

Preheating on The IR Heating Experts Team

Reducing Battery Cell Damage in Packaging via NIR Preheating

Stop Crushing Your Battery Cells: A Better Way to Seal