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the output is 28A continuous OK for LFP-21700-3200mAH in 12S3P (36V9.6AH) batteries. Plenty of power. The problem is those cells are still not as energy dense as those going into current models from Chinese EVs like Geely or BYD.

My regular supplier can build LFP-21700-3200mAH in 12S3P (36V9.6AH) into Hailong cases. Who would be interested? I am waiting for the new higher energy density generation of LFP cells.

Before Ulez, if you follow an old diesel car or a lorry for half a mile in London where every car is limited to 20 miles an hour, you don't need further convincing. I don't pay Ulez charge so I have no complaint. From BBC article: London air quality improved by Ulez and Lez - report - BBC News...

can you quote the datasource?

Nice concept.

here is a good LFP candidate for e-bike batteries: 32700-6AH LFP cells. Typical specs: 32700-6.0Ah_Specification.pdf (shopify.com) Each cell weighs 140g. 11S1P (1.5kgs) or 12S1P (1.7kgs) array is good enough for 16-20 miles. You may need to add an energy meter to your pack because the...

LFP batteries now reach 200wh/kg. Not far off the NMC chemistry that we use on e-bikes.

How many times do you think it takes before the switch is burned? Years ago, before the switch was made electronic soft switch, battery switch was simply in-line with the fuse.

One possible cause is the on/off control on the lcd. It is done via the lcd processor. I have come across a similar fault when the on/off button works only one way, the second pressing of the on/off button doesn't work. You have to switch the battery off and on again or unplug and plug in the...

in order to get to the track you want to cut, you have to dismantle the BMS. It's a no no for 99% of users regardless how good they are with their soldering iron. If I absolutely need a switch on my battery, I would just cut the black wire that goes to the battery out and insert a 15A switch...

My recommendation is don't mess with your battery.

The mechanical switch drives a FET based electronic switch. It's the latter stage that is fragile and can be broken by the inrush current. When that happens, you have to replace the bms.

the currently proposed bill is a private members' bill. None of its clauses contains any immediate measure other than encouraging various bodies to take a look. At this rate, nothing will be done in this parliament. I reckon we need a bit of speedy justice to deal with the issue. a) Police...

It does not matter much which measures will be imposed, we need to kill as many possible causes as possible to restore confidence.

Mike lynch was accused of fraud and wirefraud. The two situations are like Apple and pear.

I am against the rhetoric of the prominent brexiters. I wasn't particularly in one camp or the other on brexit although I voted remain at the end. On Grenfell, I doubt that we could sue Arconic France for supplying the ingredients such as infills and paints. They didn't fabricate the...

that guy is an electrician. He said that practically all the buildings he's worked in are defective as far as fire prevention is concerned. The tories hang on to Thatcherism as far as I can remember and still do. They want smaller goverment, less spending, less tax and less regulations. Nobody...

according to some caller to yesterday's BBC Any Answer, when Margaret Thatcher started her revolution of 'cutting red tapes', the building regs book was apparently 200 pages thick. When she resigned, 80%-90% of it has been cut. 25 pages were all what was left.

When you have a million plus people packing a few streets, some criminals will take advantage. The police arrested some 300 suspects, pretty successful I think.

The cost of protection measures is small compared to the consequences of doing nothing.