Key points of 18650 battery assembly process for lithium battery pack of electric bicycle

Howell  |  Hits:268 second  |  2021-08-30  

The key points of 18650 battery assembly process of lithium battery pack for electric bicycle are customized according to the assembled battery structure

Multiple parallel multiple string. The biggest feature of 18650 lithium battery assembly process is flexible combination, and most continuous orders can be realized

Now it is semi-automatic, so the 18650 lithium battery assembly process is becoming more and more streamlined, and the 18650 lithium battery is assembled into the battery pack

Including: 18650 battery, PCB protection board, nickel sheet, green paper accessories, PVC outer film, electronic wire or plug wire, shell

And so on, and most 18650 battery packs are suitable for this process.

Multi parallel and multi series assembly design process for 18650 lithium battery assembly of electric bicycle:

1. Adopt the principle of priority and easy operation, that is, employees are easy to operate.

2. The principle of giving priority to operation safety is adopted, that is, employees are not easy to short circuit or have better preventive measures.

3. The principle of equipment shall be adopted, that is, those completed with the help of auxiliary equipment shall not be manual as far as possible, at least semi-automatic.

4. The packaging design should be reasonable and easy to take and put. Do not take the product out of the customer for half a day.

Quality characteristics of 18650 lithium battery assembly process for electric bicycle:

1. The single battery with good quality and performance is adopted. The single battery has passed a series of safety tests and performance tests

After use.

2. It is required that the internal resistance of the battery is low and consistent. No matter 48V lithium battery pack or other energy storage battery packs, the internal resistance shall be low

Resistance ensures the capacity, platform and heat dissipation of high current discharge.

3. The battery structure adopts ventilation design, and the spacing between two adjacent batteries shall not be less than 2mm. This structure requires plastic

Fix the battery with a rubber bracket.

4. Slotted nickel sheet is used for spot welding of assembled battery. The size of nickel sheet meets the requirements of high current discharge, and the material of nickel sheet ensures low internal resistance,

The spot welding machine shall work stably, and the welding needle shall ensure the quality. The operator shall work after being trained, assessed and qualified, and after spot welding

Check whether the solder joint is firm. In addition, vibration test shall be conducted for each batch of products to verify the anti vibration performance.

5. Different batches of batteries shall be made into typical finished products and life test shall be conducted. When the experience of lithium battery pack design specification is summarized, the battery finished products

Do cycle test to get the actual cycle life.

6. Verify the high and low temperature performance of the battery. The cells of different pack lithium battery manufacturers are made into finished products and made differently at high and low temperatures

The actual discharge curve is obtained by multiple discharge test.

The above is the key points of 18650 battery assembly process of electric bicycle lithium battery pack.


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