Pack features and assembly methods

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

1 Battery packages require the battery with a high degree of consistency (capacity, internal resistance, voltage, discharge curve, life). 2 battery pack Pack's cycle life is lower than the cycle life of single battery. 3 Use under limited conditions (including charging, discharge current, charging mode, temperature, etc.

). 4 Lithium-ion battery pack PACK post-type battery voltage and capacity have great improvement, non-protective, charge equalization, temperature, voltage and overcurrent monitoring. 5 Battery pack Pack is not to achieve the design voltage, capacity requirements.

Pack's method 1 string composed: The battery is passed by the unit cell. Convergence, the voltage is constant, the voltage is doubled in series, the capacity is unchanged, such as 3.6V / 10AH battery by single N18650 / 2AH through 5 and composed.

First compact string: parallel due to internal resistance, heat dissipation will affect the battery cycle life in parallel. Z Single Battery Failure Automatically exits, in addition to the reduction in capacity, does not affect the use of parallel, and strict. When a unit battery is short-circuited in parallel, it is very large to cause the wrapped circuit current, usually plus fuse protection technology to prevent.

After the first string: According to the set of battery capacity, it is first connected in series, such as 1/3 of the unit, finally in parallel, and reduces the probability of large capacity battery packages. 2 Electrical Ball Requirements: Select the corresponding cell according to its own design requirements, and the battery requirements are consistent, the model is consistent, capacity, internal resistance, and voltage value difference is not more than 2%. In general, the battery is lost in parallel, the capacity loss is 2% -5%, the more the number of batteries, the more capacity loss.

Whether it is a soft packaging battery or a cylindrical battery, it is necessary to combine a combination of consistent, affecting the battery capacity, and the lowest capacity of the battery determines the capacity of the entire set of batteries. Require large current discharge performance. The motor start current is 3 times the normal operating current, and the large current discharge can improve motor power performance.

Request battery heat dissipation. There are many quantities of the battery, and the temperature rise inside the battery box is not easy to spread, causing temperature between each battery, no discharge characteristics, long-term battery performance. High processing technology.

Battery can withstand the vibration impact of bump road. High processing technology, especially the spot welding process. After the welding is completed, the detection is carried out to prevent deficiency.

3PACK process: The battery's PACK is implemented in two ways, one is to weld or welded or pulsed by laser welding or ultrasonic welding, which is a common welding method, and the advantage is better, but it is not easy to replace. Second, the advantage is that the advantage is no need to be welded, the battery replacement is easy, the disadvantage is possible to lead to poor contact. .

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