Search found 7 matches

by Zen
Wed, 20 Dec 2017, 15:03
Forum: Batteries, charging, management and monitoring
Topic: BMS card warning
Replies: 17
Views: 1623

Re: BMS card warning

Hi Yes you are right in many respects. The EE will not admit its a problem and says he's tested it. He did do a manual rebalance and then said its my user neglect, as did you, and gave it back. It discharged once and did not recharge. As he put that it was my error, without saying what the error was...
by Zen
Tue, 19 Dec 2017, 17:54
Forum: Batteries, charging, management and monitoring
Topic: BMS card warning
Replies: 17
Views: 1623

Re: BMS card warning

Thanks for the feedback. All good comments. I emailed the manufacturer and asked the question and will keep you posted. I somewhat doubt a timely response. That's the reason for the 'warning'. I think a lot of EE's and battery builder out there will be taking a collective gulp! as they realise they'...
by Zen
Mon, 18 Dec 2017, 19:45
Forum: Batteries, charging, management and monitoring
Topic: BMS card warning
Replies: 17
Views: 1623

Re: BMS card warning

Looking at the manufacturers website. Don't see many mystery floating objects across the PCB's they're proud of.

http://www.gzlspcb.com/col.jsp?id=103

What questions do you think I should ask the manufacturer?
by Zen
Mon, 18 Dec 2017, 18:22
Forum: Batteries, charging, management and monitoring
Topic: BMS card warning
Replies: 17
Views: 1623

Re: BMS card warning

Looks like I don't get a chance to add images. The back is very regular with the mosfet chips on the flip side of where the manufacture name plate is. Nothing irregular.
by Zen
Mon, 18 Dec 2017, 14:01
Forum: Batteries, charging, management and monitoring
Topic: BMS card warning
Replies: 17
Views: 1623

Re: BMS card warning

Good question. I'll post a pic tonight.
by Zen
Mon, 18 Dec 2017, 09:02
Forum: Batteries, charging, management and monitoring
Topic: BMS card warning
Replies: 17
Views: 1623

Re: BMS card warning

Hi. Thanks for the reply. I had the battery pack made by a supposedly reputable electric engineer near Newcastle. The battery pack only ever discharged one series of cells. I took the pack back and he recharged one cell and said all was OK. It wasn't as the battery pack only worked once for a short ...
by Zen
Mon, 18 Dec 2017, 07:35
Forum: Batteries, charging, management and monitoring
Topic: BMS card warning
Replies: 17
Views: 1623

BMS card warning

Hi Has anyone had experience with these BMS cards? They are available from ebay or amazon for about $15, yet have manufacture errors in alignment of the chip sets. If the uploaded images come through, I've highlighted a 1 mm chip that is 1 mm out of alignment in the exact same spot across all 4 card...