LifeIsADeam
New Member
- Joined
- Mar 22, 2021
- Messages
- 23
Individual cells spikes when put on charge for first time.
I have 200ah cells hooked up to jbd 120a bms. The cells arrived within 1-2 mv of each other. Grade A matched. I let them sit in parallel for a month while waiting for other things. I wanted to try a couple of cycles without top balancing to possibly avoid buying a bench top charger for one time use.
Everything looked good hooking the bms up. Settings added from overkills site. When then hooked to the victron mppt i got voltage spikes of around 0.2v difference on cell 1, the bms app showed red for that cell triggering the overvoltage cutoff. I checked the connections and when re connecting it was now cell 3 spiking. It seemed like a connection issue with the balance leads as when using a voltmeter on the terminal screws it showed a different reading than the bms by 0.2v.
I got better ring terminals and re crimped which seemed better until it spiked again. Ive attached screen shots of bms display and settings. Any advise. Perhaps i just get a bench top charger? I thought wouldn't be an issue until perhaps when reaching the top end of charge?
I have 200ah cells hooked up to jbd 120a bms. The cells arrived within 1-2 mv of each other. Grade A matched. I let them sit in parallel for a month while waiting for other things. I wanted to try a couple of cycles without top balancing to possibly avoid buying a bench top charger for one time use.
Everything looked good hooking the bms up. Settings added from overkills site. When then hooked to the victron mppt i got voltage spikes of around 0.2v difference on cell 1, the bms app showed red for that cell triggering the overvoltage cutoff. I checked the connections and when re connecting it was now cell 3 spiking. It seemed like a connection issue with the balance leads as when using a voltmeter on the terminal screws it showed a different reading than the bms by 0.2v.
I got better ring terminals and re crimped which seemed better until it spiked again. Ive attached screen shots of bms display and settings. Any advise. Perhaps i just get a bench top charger? I thought wouldn't be an issue until perhaps when reaching the top end of charge?
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