openinverter forum

Hello,

Does anyone have an opinion on the best EV salvage battery to meet the following characteristics:

- 100kg weight limit
- 80kw peak
- 30kw continuous
- Abundant in the EU

Bonuses:

- Bundled BMS that integrates with zombieverter
- No cooling _or_ integrated cooling
- Highest energy density possible
- Highest cycle design life possible

Use case:

- Short range drive of a VW T3 kombi, driven on front diff. Rear diff will be driven by ICE.

What voltage range?
Is the weight including or excluding the housing and all other required components?

You are going to struggle to find anything really with these specs. Like really hard.

Have a look here: https://openinverter.org/wiki/Batteries

Voltage range 300v-400v.

Not counting housing.

I think if I can get 15kwh I'll be happy.

Thanks for the link, I'll check it out!

Scrappyjoe wrote: ↑Wed Mar 20, 2024 9:57 am Voltage range 300v-400v.

Not counting housing.

I think if I can get 15kwh I'll be happy.

Thanks for the link, I'll check it out!

Can offer BMW X5 24 kwh (22 kwh)

Well i would say vw golf gte hybrid 8kwh and vw passat gte hybrid 9kwh are plentifull here for 2k€. There are Skoda hybrid 13kwh to be get but much more expensive...

There also BMW hybrid 12kwh cells that damien tested. About 2ke too. Both VW and BMW are in their casing which means they are easier to handle and transport by truck.

The main issue is the smaller hybrid packs are not as energy dense as they're setup for power.

For instance the BMW packs are ~6.5kg per kWh, the VW ones are in the 8-9kg range.

The best batteries are in the 4.5kg range, but are arranged in such a way that 100kgs of them isnt going to give you 400v.

100kgs worth of id3 12s modules for instance is only getting you ~36s.

I consider full power from vw hybrid packs only if you use liquid cooling.

This is why I posted the question - one seems to need to compromise somewhere. Given the fact that I am going for a hybrid setup, I should probably just look for the best hybrid battery I can find since I won't be able to build anything better than a large OEM engineering team.

@m.art.y how much does that X5 battery weigh? Google isn't giving me an answer. I'm going to guess around 200kg.

Scrappyjoe wrote: ↑Wed Mar 20, 2024 12:13 pm @m.art.y how much does that X5 battery weigh? Google isn't giving me an answer. I'm going to guess around 200kg.

I have 11 modules out of 12 and one module is 12 kg. 11 modules still give you 88S and ~316v nominal at 132 kg without the casing. 12 kwh BMW pack would be even lighter but the capacity is just half.

I think the modules/cells are the same as the other BMW ones, they're just configured as 8s rather than 16s and theres twice as many.

22kwh for 132kg sounds pretty good. The BMW modules sound like a good bet - but I need a higher nominal voltage.

At any rate this all sounds promising so I’ll ping my shipper and see how adventurous they are feeling

I think you're only real constraint is space!

I don't see an extra 100kg here or there ruining the legendary handling of an ancient bus at low speeds...