CITIC Guoan MGL Power Technology Co., Ltd produces the SPIM08HP pouch cells that are being recycled and sold by alarm hookup on EBay.
- Model: SPIM08HP
- Chemistry: Lithium-ion Manganese
- Dimensions: 8mm * 140mm * 190mm
- Nominal voltage: 3.6V
- Charge Voltage: 4.2V
- Cutoff Voltage: 2.5V
- Amp Hours: 8Ah
- Max Current: 200 Amps
- Max Charge Rate: 15C
We drill small #4 size holes into the terminals, and bolt together a 10S string using the shortest #4 screws we can find. At each screw, we attach an eyelet connected to a balance wire.
The joined cell terminal end is then encased in a section of red PEX tubing (can be found in plumbing section of Lowes/Home Depot).
BMS is attached, and entire pack is housed in a $5-$7 plastic ammo can purchased from Harbor Freight. We’ve made versions of this pack with regular post terminals and XT60 connectors.
- Configuration: 10S (1P)
- Nominal Voltage: 36V
- Capacity: 8Ah (288Wh)
We charge with a DPS5005 set to 42V / 1.0A to preserve cell life. The pack may be charged at 15C which is 15 * 8Ah = 120 amps. Obviously, picking the C-rate at which to charge your pack depends on both the cell’s listed C rate, and your BMS unit’s amp rating.