Hi guys
I Own a Carver Onean unfortunately the battery didn’t last long.water was actually leaking out ot the locking mechanism and the battery didn’t show any signs of life.
Was waiting for ever to get a replacement battery from Jon in Onean .
But the company closed instead.
Didn’t want to give up on the board
So with the help of friend.owner of a small factory for E trike and battery packs .we open the carver battery and build a new design 12s1p 60ah 5c cells that can handle the carver motor quite easily.and last much longer
Someone try to build a replacement battery for Onean? As many board out there seems like the board will last and pretty soon there will be no good batteries to run them .
1 Like
Hello from Greece.
As you describe you found the way to build a new battery for Carver X?!
Where are you from?
My best regards.
Andreas (andreaskrinas@outlook.com)
I wonder how to open the battery without damaging it. And also how to seal it back up perfectly after refurbishment.
What kind of cells were used? Capacity 60Ah with a continuous current load of 130A (5C~300A) at 3.7V, only Li-Pol prismatic cells are considered.
Original Akku Power GmbH Lithium Ion Battery APAQ 12S16P parameters:
Weight: 12KG
Cells: 192=16x12 Samsung INR18650-25R R5 2500mAh
Nominal voltage: 44,4 V (44,4 V/12=3.7V per cell)
Max Power: 5000W
Max. electric discharge: 130 A (12S: 3.2V * 12 = 38.4V, 5000W / 38.4V = 130.2A, 16P: 130.2A / 16 = 8.14A)
Capacity (rated): 1500 Wh/40 Ah
Cycle count: 500 (estimated)(~300)
Charger 15A/50.4V (15A/16=0.9375A Charging Current per cell)
The pack are built based on the cell array of Samsung´s lithium-ion battery with 18650 format, which is widely used on electric cars or power tools.
Samsung INR18650-25R R5
Nominal Capacity: 2500 mAh
Nominal Voltage: 3.6V
Discharge End Voltage: 2.5V
Standard Charging Current: 1.25A
Charging Voltage: 4.20±0.05V
Max. Continuous Discharging Current: 20A
Battery Capacity (Mfg Rated): 2500 mAh
Battery Chemistry: INR - LiNiCoMnO2
Battery function: Rechargeable
Battery Shape Factor: INR 18650
Battery Rated Voltage: 3.6 V
Brand: Samsung
Depth: 18.2 mm
Height: 65 mm
Width: 18.2 mm
Battery cell layout option
Sony / Murata US18650VTC6 3120mAh - 30A (see eu.nkon.nl)
16px12s=192 cells á 3.75€ with VAT (750€ price for 200 pcs)
Capacity 16x3.12=49.92Ah/~1872Wh (25% higher capacity compared to the original cells)
Thank you very much.
Andreas
Coralli Resort Serifos
Have you had any success with the rebuild? I just picked up one of these boards with 2 battery packs and a week apart both batteries won’t take a charge. Assuming is the BMS that has failed I want to open the box and test it. The case seam has separated but I can’t seem to get the case around the terminals to free up. Step one separate case is a bust as of now. It looks super simple inside from what I can tell I just don’t want to break the housing, I have no access to molding plastics without a serious project. Thanks in advance
I think this is a case where the voltage of individual battery cells has dropped by self-discharge below a certain limit (approx. 2.5V) and the BMS then refuses to charge them because it considers them destroyed or too worn out. This may not be true and the remedy is to charge each individual battery cell to at least 2.6V (better 3.0V). I do this by directly attaching the contacts of the 3.6V DC source and the correct cell poles. It only takes a few minutes and the cell voltage will increase from e.g. 0.7V to 2.7.V. This needs to be done for all cells (there are 192 of them) and at least measure them to see if they are in the range acceptable for BMS operation. The BMS will already rebalance the cells to the same voltage when connected to the charger.
I haven’t opened any batteries yet, but I was thinking of carefully cutting off the bottom of the battery with a few centimeters of edge and after replacing the cells, laminating the walls around the perimeter of the cut to reinforce and seal the cut. The lamination layer must be quite thin as there is not much room in the battery shaft. As a protection against possible water ingress into the battery, I would waterproof the cells with a non-conductive gel (DISTYK TL 04.95DEU ELECTROGEL), which is used, for example, to waterproof the motor contacts. This can be seen after removing the smaller front motor cover. By the way, the spaces under the cover are not watertight at all, but flooded with water.
.
I would be interested in pictures of even a partially disassembled battery. So far I’ve only seen images of the cells of a burnt out battery, but from these I can’t discern the possibilities of the battery disassembly procedure.
Perhaps a solution would be to contact the direct manufacturer of the Onean battery, which is Akku Power Gmbh. This company routinely remanufactures (repass) batteries for cordless tools, so they may be able to remanufacture batteries that they have made themselves. I don’t know at what cost though.
Headquarter
Akku Power GmbH Batterien
Paul-Strähle-Straße 26
D-73614 Schorndorf
Contact:
Phone: +49 7181 97735-0
Fax: +49 7181 97735-29
info@akku-power.com
France
Akku Power France
64/70 rue Rouget de Lisle
92150 Suresnes
Contact:
Phone: +33 1 81 93 82 50
Fax: +33 1 70 24 86 91 gael.legrix@akkupower.com
Czech Republic
Bech Akku Power, baterie s.r.o.
Kozojedy 141
331 42 Kralovice
Contact:
Phone: 373 398 300
Fax: 373 398 259
info@bechakku.cz
Italy
Akku Power Italy
Contact:
Phone: + 39 3483162296
Fax: +49 (0) 7181 97735-29
info@akku-power.com
Spain
Akku Power Iberia
Sallares i Marra, 72-78 Local 2
08203 Sabadell (Barcelona)
Contact:
Phone: +34 93 7125016
Fax: +34 93 7205946
iberia@akku-power.com