LeftieBiker wrote:No, that's because replacement laptop batteries and cell phone batteries are very cheap and easy to self-install, and the weight of a TMS would be a problem for consumers. If laptop batteries were essentially permanently installed, there would be better cooling systems in them.
My laptop batteries are permanently installed, as are my cell phone batteries. OK, with special tools you can disassemble both and then glue back together. Not for the non-technical, to say the least. I've never seen a cell phone with a battery thermal management system. Or a laptop.
Now for some real reasons. How much battery power would be needed to keep the battery in the cell phone cool for a day? How much bigger would the cell phone battery need to be?
Why are there no warm blooded mammals much smaller than a mouse? Why does a bee humming bird (the smallest warm blooded bird) need to eat well over twice its mass every day... and still can't be warm blooded full time? And cooling is a harder problem than warming.
Heat loss/gain is proportional to surface area. Battery energy storage is proportional to volume. As an object gets smaller, the energy storage goes down faster than the surface area. Get small enough, and it gets harder to maintain at any temperature other than ambient. A laptop is not as thermally insulated as a mouse, has a higher ratio of surface area to volume, because it is thin, and needs to be cooled rather than heated.
Want a laptop or a cell phone with active cooling battery and similar operational time? It would be at least as thick as a brick. Larger battery, thermal insulation, cooling hardware, etc.
I can turn my cell phone off, and the battery will stay at almost the same charge level for months. Same with my laptop, if I shutdown. Same with my Leaf. If there was a TMS system? The shutdown time for a laptop or cell phone would be hardly longer than the operational time. The laptop would drain in a day. Leaf would be much better, would drain the battery in weeks, much as a Tesla will drain to bricked batteries in a few months.
Active cooling isn't free. I don't want it for my laptop or my car.