Punx0r wrote:I think an important benchmark for any active or passive cooling system is how it compares to simply adding more/better battery instead, considering overall system weight, cost, complexity and reliability.
Agree completely. Every application will have its constraints, and in the case of race bikes, it's volume followed by weight. Adding more battery can be done, but there is a trade-off with weight and how the shape of the battery impacts on the centre of gravity. On a race bike, cycle life it almost irrelevant - 100 cycles a year.
But the other element is battery longevity, and this will be achieved through either 1. not hitting the battery too hard or 2. adding some kind of cooling feature. Given racing is all about contravening point 1. there is some merit in exploring cooling.
I am a huge advocate for spec the battery right so that you don't generate as much heat, and therefore negate the need for cooling.
One thing I am not familiar with living in a hot part of the world is how low temperatures impact battery health. And given most of the EV-driving market lives above the 40th parallel, I guess some kind of temperature management is a good idea.
SO I will be adjusting for mass and volume in my experiments, for sure.