18650 lithium battery pack process analysis

The 18650 lithium battery pack process is mainly based on the PACK battery structure. Most of the 18650 lithium battery pack process features are similar. The characteristics of the multi-string and 18650 lithium battery PACK process are very distinctive. The biggest feature of the 18650 lithium battery PACK is the combination is flexible, most of the continuous orders can be semi-automatically completed. It is conceivable that the 18650 lithium battery pack process is now more and more simple. The general 18650 lithium battery PACK battery pack includes: 18650 batteries, battery protection board. Connect nickel sheets, lead nickel sheets, green paper accessories, insulating paper, wires or plug wires, PVC outer packaging or casing, output (including connectors), key switch, power indicator, and EVA, bark paper, plastic bracket, etc. The auxiliary materials together constitute PACK, and most of the 18650 battery PACK types are not separated.

18650 lithium battery pack craft skills summary analysis

First, what should be paid attention to when welding 18650 lithium battery pack technology?

1, 18650 lithium battery should pay attention to the spot welding current when welding.

2, 18650 lithium battery should pay attention to the diameter of the welding pin when welding.

3, 18650 lithium battery should pay attention to the welding pin spacing when welding.

4, 18650 lithium battery pack process welding should pay attention to the number of solder joints.

5, cannot be fired during spot welding, cannot be short-circuited, cannot be welded.

Second, what should be paid attention to 18650 lithium battery pack soldering process?

1, 18650 lithium-ion batteries should be paid attention to when soldering tin wire diameter.

2, 18650 lithium-ion batteries should be paid attention to when soldering tin soldering temperature steady.

3, should be paid attention to when soldering tin soldering time can't more than how many seconds.

4, tin welding different 18650 lithium battery materials in the surface of the welding head is also different.

Third, what should be paid attention to when the 18650 lithium battery pack process is matched?

1. Set the internal resistance of the battery, voltage, and self-discharge.

2. Set the channel and grade.

3. Set the number of matches per channel.

4. If there is a bad, it needs to be isolated and analyzed in time.

18650 lithium battery pack craft skills summary analysis

Fourth, more and more string 18650 lithium battery pack design process skills.

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

2. Take the principle of priority operation safety, that is, employees are not prone to short circuit or have better preventive measures when operating.

3, take the equipment principle, that is, with the aid of auxiliary equipment, as much as possible without manual, at least semi-automatic.

4, the packaging design should be reasonable, easy to take easy to put, do not get the product out to the customer for a long time cannot get out.

Fifth, 18650 lithium battery pack process quality characteristics:

1. Lithium batteries with quality pass-through, need qualified and stable suppliers to provide good performance single cells, single cells after a series of safety tests and performance tests, qualified after use.

2. It is required that the internal resistance of the battery is low and the consistency is good. Regardless of the 14.8V lithium battery pack or other energy storage battery packs, the capacity, platform and heat dissipation of the high internal current discharge must be ensured.

3. The structure of the battery is ventilated, and the distance between the two adjacent batteries is not less than 2mm. This structure requires the plastic bracket to fix the battery.

Summary analysis of 18650 lithium battery pack process skills

4. PACK battery factory? Use slotted nickel plate for spot welding. The size of nickel plate meets the requirements of large current discharge. The nickel plate material guarantees low internal resistance. The spot welder guarantees stable operation. The welding pin guarantees the quality. The operator is trained and evaluated. After the qualified operation, check the solder joints after spot welding. Vibration tests were also performed on each batch of products to verify vibration resistance.

5, different batches of batteries to make a typical finished product and do life test, lithium battery PACK design specification experience when the battery finished product cycle test to obtain the actual cycle life.

6. Verify the high and low temperature performance of the battery. Different PACK lithium battery manufacturers' batteries are made into finished products and do different rate discharge tests at high and low temperatures to obtain the actual discharge curve.

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