Integrate the new-fangled battery (of whatever specific chemistry), the BMS, and the heater into a box with just two posts on top (just like lead acid batteries have had for over a century). It can be designed to take care of itself.
And if it's cheap enough to produce and sell, and offers good enough performance over its normal usable lifespan, then it doesn't need a diagnostic interface for sorting out issues any more than a lead acid car battery does today.
I understand 12 volts, but why not a 12 volt Li battery? I don't know.
But Lithium batteries can't be recycled. Saying "We are almost there" and "The future looks bright about it" is "moving fast and breaking things" again
https://www.businesswire.com/news/home/20240618645137/en/Gre...
The real barrier for recycling waste is sustainability. This is the reason why e.g. TETRABRIK is considered recyclable, but it is actually not (I am posting about this parallel because it has been completely understood for several years)
Anything can be recycled if we are pedantic. But will it actually stop generating waste? (or will they be silently exported ignored?) Will subsidies be sustainable? (not it even asking if it can be profitable) In reality, the "recyclable" brand is for the most part greenwashing.
Now, the business ad about a venture capital bussiness you posted is nothing new. Last year there were 5 such touted recycling plants in Latin America, already. One of them is located in Costa Rica. Costa Rica doesn't have a Lithium battery waste issue. There, the electric cars are very few (and people who got them already want out), there are no electricity storage facilities. I am guessing here that they will import a ton (hundreds of tons) of waste from "Somewhere else"
I am including an article on battery recycling that is easy to read. It is only 40 pages long.
And, for more downvotes: Lithium batteries are as recyclable as a TETRAPAK: still generating waste, most of the time all of it ends up as waste.
An equivalent LiIon battery would not need to be replaced so quickly.
So at some crossover point the environmental cost of X * recyclable Lead acid batteries is higher than LiIon batteries.