Flow chart of production process for power battery pack

Power battery pack is generally made up by five systems.

That how the five systems together, constitute a complete and reliable mechanical strength the battery pack? It is the assembly process.

PACK the assembly process is similar to traditional fuel automobile engine assembly process.

Through bolts, nuts, cable tie, clamp, cast wire nails and other fittings connect five system together, constitute a assembly.

Power battery pack production process _ power battery pack four technology is introduced

2, air tightness detection technology

Power battery PACK is generally installed at the bottom of the new energy car seat, or under trunk, is directly in contact with the outside world. Once when the high voltage contact with water, through the common sense, you can imagine the consequences of things. So when the new energy cars wade, you need the battery PACK has a good sealing.

In the process of power battery PACK manufacturing air tightness test is divided into two areas:

1) thermal management system level of gas tightness detection;

Level 2) PACK the air tightness test;

International electrotechnical commission (IEC) specified in the drafting system of protection grade, power battery PACK must reach IP67 rating.

The Shanghai auto show in April 2017, saic passenger car is showing off her high air tightness of the cow force protection technology. Put under the charging status of the whole PACK in a goldfish bowl soaking in 7 days, the goldfish is in good condition, and in the PACK into the water.

3, software flash process

No software of power battery PACK, there is no soul.

Software flash burn, also called software or software filling.

Software flash process is to brush BMS control strategy in the form of code into the CMU in BMS and BMU, to test the battery and battery status information of the data gathered will use process, by the electronic control unit for data processing and analysis, and then according to the results of the analysis on the relevant function module in the system sends out control instructions, eventually pass information to the outside world.

Power battery pack production process _ power battery pack four technology is introduced

4, electrical testing technology

Electrical testing process is in the three process is completed, the testing technology of the product will do before logoff.

Electrical testing points three links:

1) static testing:

Insulation testing, charging status, speed testing, etc.;

2) dynamic testing;

Through constant high-current power battery capacity, energy, the parameters, such as battery consistency evaluation.

3) SOC adjustment;

Adjust the SOC of the battery PACK SOC to the factory

SOC: State Of Charge, popular will is the SOC of the battery.

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