EV 6

Author	Message
Trev Guru Joined: 15/07/2006 Location: Australia Posts: 676	Posted: 08:31am 20 Feb 2011       Planning to make a new wind gen tower. I need to carry long lengths of gal pipe. But with the face lift on the EV Hilux front, I decided that the front carry bar should be mounted better, mounting it on the chassis instead of on the bumper. So welded up the holes in the bumper before painting. I have just finished changing the bottom end of the front carry bar. Much better now, bolts to the chassis. In the first picture you can see what used to be on the bottom and the way it is made now. The balancing of the cells has still been ongoing. I have had to manual balance every few months or so with my 144v pack. The 144v pack goes out of balance probably because of the high current discharges, older pack and uneven temperatures between cells. The max voltage per cell probably has some efect too. And the monitoring system, anything conected to individual cells will unbalance the cell voltages. But I am not prepared to go without monitoring, I want to know where the pack is at. The 12v pack was measured this after noon with a difference of 0.18v. This 12v battery has not been balanced since I had the first Relativites test on for a few weeks, back in October 2008, about 1 year 4 months. This does not have anything connected to individual cells, all low current operation, not charged too high, and identical temperature in each cell. But yet there is some difference. Many new circuit configurations have been tested on Gordon's 24v wind/solar setup. While the Relativities circuits work perfectly, we would like to see yet higher current transfer between cells for large EV battery packs, simply because of the long distance between each circuit from one end of the pack to the other. These Relativities circuits are perfect for small battery packs, 12v and 24v. The transfer rate is up to 1 amp. Just recently we believe we have hit the jackpot. The latest test on single cell circuit draws its power from the whole pack and delivers directly to low voltage cells, and transfers up to 3 amps. Each cell requires one circuit. It does not active balance like the Relativities, it can only balance at the top end of charge. This circuit will work perfectly on battery packs of different number of cells. It works perfectly with an input voltage of 48v up to I expect something like 260v, maybe more. I don't know. I could only test on my pack of 168v peak (144v nominal) and worked perfectly. Output of 3.7v regulated or fixed regardless of what the input voltage is. I am currently looking into the costs of production. Trev @ drivebynature.com