Definitely these to packs draining quicker than the rest, so system shuts down early.
Darfon Gro Watt GBLI 5001 Battery Pack- worth a punt?
- Thread starter -C-
- Start date
Definitely these to packs draining quicker than the rest, so system shuts down early.
You can buy a USB charger that will charge the individual cell packs. It takes about a day per cell pack
You'll need crocodile clips too
1x USB Voltage/Amps Power Meter Tester Multimeter Test Speed Of Chargers, Cable | eBay
Tester Current: 0-3A. Cable Length: 20cm(include USB). Low line loss, has an accuracy better. Capacity Range: 0-19999mAH. Test your phone. Size: 5.8 2.7 1.8cm(L W T). Line Loss: About 0.1Ω. 1,The real color of the item may be slightly different from the pictures shown on website caused by many...
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USB Male Connector Power Supply to Alligator Clips Crocodile Wire Test Leads to | eBay
Another connector:USB Male.
www.ebay.co.uk
paulca
New Member
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- Sep 13, 2022
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- 79
No , unless you can vary the output to match the charge curve. Actually, given how unbalanced your packs are I wouldn't risk it as it'd be far too easy to overcharge one, then your shed's on fire. The other option you have if you just want to get them balanced is to disconnect every cell pack , and wire them all in parallel they should balance out within a few hours, BUT , you'll probably have the same issue with the last two strings when you start discharging again. I'd take those 2 out , separate them all , put a consistent load onto each and watch the voltage drop.... You've almost certainly got some duff cells in those last 2 strings. if you put a 20-50W load on each, start stopwatch , measure voltage every 30 secs , you should be able to spot the dodgy ones as they'll drop in voltage really quick. .....OR there may well be a cheap "cell testing kit" I don't know about , worth a google.
Has anybody had any luck with spot welding new cells in yet I'm currently having a go and have found out that if the nickel isn't pure nickel it doesn't weld very well at all so just waiting for some pure nickel strips to arrive also I have worked out that it is possible to squeeze an extra cell in each pack on the top corner by cutting some of the plastic surround away where the vacant cell is and then easily welding the extra cell in
Higher_wire
Business
@Tad we mix and match cells all the time. Shouldn’t be an issue if you add one new per cell-string.
Spot welding is heavily dependent on a number of factors: surface finish, electrode wear, material imperfections, etc. Many hobby welders have difficulty making consistent welds. We actually use and really like kWeld for getting into tight spots where it’s inconvenient or impossible to use one of the Sunstones.
Glad you’re using pure nickel! You‘d be surprised to know that there are reputable brands that use nickel-plated steel. It’s always fun watching the heavily-corroded conductors disintegrate with the slightest touch of the flappy wheel. On the bright side, that isolates individual cells so we’re often able to save a few within a cell string.
Spot welding is heavily dependent on a number of factors: surface finish, electrode wear, material imperfections, etc. Many hobby welders have difficulty making consistent welds. We actually use and really like kWeld for getting into tight spots where it’s inconvenient or impossible to use one of the Sunstones.
Glad you’re using pure nickel! You‘d be surprised to know that there are reputable brands that use nickel-plated steel. It’s always fun watching the heavily-corroded conductors disintegrate with the slightest touch of the flappy wheel. On the bright side, that isolates individual cells so we’re often able to save a few within a cell string.
update I have fixed my batteries, I have made two small packs of 3 in Parallel and 14 in series and Now have two BMS making a total of 30 Kw, The JK BMS works very well at balancing the batteries, Now the issue im facing is the inverter can't charge within the 4 hour off peak time, I am looking to purchase a Huawei R4875 power supply this 53.5v at 75amp, I am thinking of putting it in Parallel with solis inverter to boost the charging speed.
Will let you all know how it goes.
Will let you all know how it goes.
Thanks for that feedback would you be interested in spot welding the existing copper and nickel back planes back onto the cells for me if so where are you based? Tia
Higher_wire
Business
We're located in Arizona, USA. Shoot a DM and we can see if that's doable.
Here's my effort at welding some Nickel strips on before then welding the copper and nickle back plane back on I went horizontal and one side and vertical on the other
Spot welding is an art and I think the better quality machine you have the better the job will be but anyway got it all back together and it seems to work ok
Spot welding is an art and I think the better quality machine you have the better the job will be but anyway got it all back together and it seems to work ok
I also bought this active battery balancer the connection for the strings is the same 14 string connecta as the daly BMS so it's so easy just to simply unplug and plug the balancer in apart from the connector strip does need a bit slicing off 
so that the pins line-up ok
so that the pins line-up okIf it's the same small white connector it should work ok
Supermans_1
New Member
Ok done
Let me know if all good
Note: everyone's GBLI5001 battery will have different SOC'S.
Upon tinkering with the sp2000 settings in lead-acid mode I couldn't work out why why the sp2000 was still tripping out with error code 118 when charging it turns out that because of lead acid float charging the vbat setting low and high are better off as the same voltage and are better set to the optimum charging value of the battery CAPABILITY - the standard setting is 58 volts for both the settings but because of age and degradation I have changed mine to 56.5 volts (which is 100-percent soc for mine) now the float charging voltage is not active anymore and the sp2000 is no longer tripping out so it's all about the battery capability given its age and degradation ie it will not charge anymore than it can.
And likewise for discharging the vbat low and high settings I think the same principle applies ie my battery discharges to about 49 volts at 50% soc so the setting I have changed to is 49 volts for both vbat low and high to keep the sp-2000 controller from tripping out (Or over discharging)
I'm not sure if the same or similar principles apply for a standard GBLI5001 battery regarding the over charging and over discharging with its original BMS might be worth a few tweaks though if anyone has still got the original setup !
Upon tinkering with the sp2000 settings in lead-acid mode I couldn't work out why why the sp2000 was still tripping out with error code 118 when charging it turns out that because of lead acid float charging the vbat setting low and high are better off as the same voltage and are better set to the optimum charging value of the battery CAPABILITY - the standard setting is 58 volts for both the settings but because of age and degradation I have changed mine to 56.5 volts (which is 100-percent soc for mine) now the float charging voltage is not active anymore and the sp2000 is no longer tripping out so it's all about the battery capability given its age and degradation ie it will not charge anymore than it can.
And likewise for discharging the vbat low and high settings I think the same principle applies ie my battery discharges to about 49 volts at 50% soc so the setting I have changed to is 49 volts for both vbat low and high to keep the sp-2000 controller from tripping out (Or over discharging)
I'm not sure if the same or similar principles apply for a standard GBLI5001 battery regarding the over charging and over discharging with its original BMS might be worth a few tweaks though if anyone has still got the original setup !