My latest EV project

Author	Message
galderdi Regular Member Joined: 12/08/2016 Location: Australia Posts: 99	Posted: 02:47am 20 Sep 2021         Godoh said   Hi Galderdi, I have 660 amp hour cells in my solar system. They are VRLA but weight about 35 kilos each. I am assuming that the traction cells would weigh similar so the overall weight would end up around 840 kilos. I would think that is way too heavy for a car. The ones I saw on ebay were second hand, hence the price. I paid around $3500 for a 12 volt bank of BAE cells, of course they were new. Sounds like the motors you are using are acting the same as a Series wound DC motor. If it were possible to have a Compound motor then the torque curve could be flattened. Anyway sounds like you are on top of it all and from what I have seen are doing a great job. I have dreams of building an electric car one day. Deciding on what car to do it to is the problem. I live in a place where all wheel drive or 4wd is pretty important in winter, and a good long lasting body of the car would also be needed. Oh well dreams Cheers Pete Thanks Pete My previous two EVs didn't need much range and I used a 7Kwh portion of a Chevy Volt pack. That cost $2,500 but that was quite a few years back. That pack is about 65Kg from memory. I need at least 10kwh to make the car even remotely usable. I need to keep the battery weight to about 100kg otherwise I risk exceeding the weight for the vehicle and the engineer may insist on more tests/cost. Yes this is a series wound motor. I considered changing to an AC motor. But there is a big gap in the market between those running on around 170v up to 350v and up. 170v would not give me any real advantage and I can't fit batteries to support 350v. I figure I will stick with my current setup and I can always upgrade at a later date when different options become available. A Subaru Brumby might be a good option for you. AWD and a ute giving options for battery installation. Plus it's old enough to not face the component integration issues most modern (2000 or later) vehicles face.