Steps to Custom Lipo Battery
1. Custom Lipo Battery Cell
Before confirming the lipo battery assembly you need, please let us know the following:
- Charge & discharge current rate of the battery.
- The max size of whole lipo battery.
- PCM requirement. Generally, lithium poly cell adds PCM to protect short-circuit, over-current, over-voltage.
- Wire & connector model selection.
2. Cell selection
Based on the max size the customer provide, we will check and confirm the cell size. So we can evaluate the capacity, charge & discharge current rate, production artwork, and raw material proportioning.
It will be produced by following steps: positive & negative pole mixing, cathode & anode mixing, cutting, film-making, winding, aluminum plastic film making, assembly, injection, formation, second seal, grading, full test, Pack.
3.1. PCM design
1. Over-discharge protection: When the lithium-ion polymer battery is about to run out, the voltage reaches a minimum required value (usually 3V), the protection board will be turned off, and the product will not be able to discharge.
2. Overcharge protection: When charging the polymer lithium-ion battery product, when the voltage reaches the highest voltage (4.2V), the protection board will automatically power off and shut down, indicating that it is fully charged and no longer continues to charge.
3.2 PCM design
3.3 Short-circuit protection: When the polymer lithium-ion battery is accidentally short-circuited, the protection board will automatically shut down within a few milliseconds and will not be powered on.
3.4 Over-current protection: When the polymer lithium-ion battery is discharged, the protection board will have a maximum current limit. Different products are different. When the discharge exceeds this current, the protection board will automatically shut down.
4. PACK assembly
Battery pack generally refers to assembled batteries, mainly refers to the processing and assembly of lithium battery packs, mainly to process cells, battery protection boards, battery connection sheets, label paper, etc. into products required by customers through the battery pack process. The battery pack is now mainly concentrated in the lithium battery pack factory. They all have their own pack structure design, pack electronic design, and pack production workshop. They can independently develop and design according to the needs of customers. Through the battery scheme, battery specification, battery After the samples meet the customer’s PACK lithium battery customization requirements.
5. Wire & connector selection
As the wire or connector are the electricity exit port, we shall confirm whether customers need wires or connector. Ref it is wires, they usually 2 wires AWG 32#, 30#, 28#, 26#, then customer solder the pins to main board. Ref it is connector, we will consider the female connector to repair. Usually they are JST, Molex. Of course, sometimes it requires 3 Pin or 4 Pin at end. Please see the following connectors for reference.