Swiss instrument supplier Inficon has been detecting air leaks for years — on air conditioners, refrigeration, airbags and transmission housings — to look for manufacturing flaws and toxic chemicals. Now the auto industry is asking the company to find leaks in a booming new segment: electric vehicle batteries.
And it's not about air getting out. It's about the possibility of water getting in.
Rainwater splashing into a battery enclosure from the road surface or lake water seeping in while the owner of an electric SUV launches a fishing boat can potentially ruin a big battery.
The question facing automakers and battery suppliers all over the world now is how to make sure something the size of a mattress hasn't ended up with a tiny leak in its seal during mass production.
Inficon's solution is to apply a technology it's been using for years on other products to batteries coming down the assembly line. It pumps helium into …