Recent content by pelicanpebble

That post was the main reason for my question of whether you know how deep the terminal can be drilled: While the OP in that post says that the machine shop "removed" the stud, that is most likely not what they did: The studs seem to have a hexagonal "head" that is pressed into the welded...

@meetyg No, I used the flange nuts Docan supplies with it's cells.

@peacefulcurrant Sorry, I hijacked your thread, since I have the same problem.

Yeah, and it looks like Docan has absolutely no intention of delivering replacements. Amy seriously suggested I pay for shipping the faulty cells to and from China so they can re-weld some new studs! Delay: 4 months.

@zcskywire2 Thank you very much! I also really appreciate your effort! Do you think the LF304 can be drilled to the same depth?

@peacefulcurrant Can I ask where you got your cells? I ask because I have the same problem. I got my cells from Amy at Docan Power. I followed their torque specifications to the letter and the bolts on their cells still broke!

I got 8 EVE LF304 from Amy at Docan Power. Before assembling the cells, I asked her what torque to use to avoid damaging the welded terminals. Her answer was: "The normal torque ＜6N.m" To be safe, I set my torque wrench to 5 Nm. While tightening the nuts I encountered an odd phenomenon: As I...

I just looked at the datasheet for the bm3451. I think, you have a good system to modify. It says: [...] in the state of over-discharge [...] the output voltage of DO will turn to GND. The discharge MOSFET will be turned off and stop discharging [...]. It specifically does not say anywhere...

Looks very solid. Could you explain a bit more? Am I right that you use the Electrodacus as a BMS that controls relays? What type of relays do you use? Bistable or monostable? I was considering the Electrodacus but it is no longer available; and the developer seems not to have followed through...

Ok, I see. We got our wires crossed. Sorry. I have done a bit of research on commercial devices that could help with this. None that I found are able to control bistable relays directly. But some are made specifically for controlling separate charge and discharge relays. I case you are...

In theory you could connect them in parallel PROVIDED that your large external shunt has a significantly lower resistance than the internal shunt. Otherwise a much larger than designed current will flow through the internal shunt and blow them. Is safer to just disconnect them all-togther. The...

You can with JBD devices. You have to go use the JBDTool with the RS485 interface however. That would probably not be feasible if I use a small BMS to modify. A device for 20A will likely have a much higher resistance as a current sense resistor than a 500A device. The first will use a higher...

I have a 4S LiFePO4 battery bank from which I need to draw 400A for about 3-5 minutes. After some discussion with JBD, they concluded that none of their BMS will work for me. Hence my latest idea: Can I use a modified low-current split-port BMS to drive my charge and discharge relays? And of...