Busbar of high-rate discharging module

Abstract

The invention discloses a busbar of a high-rate discharging module. The busbar comprise a busbar body, the busbar body is composed of two layers of base materials, battery-cell-polarity observing holes are formed in the two layers of base materials of the busbar body through penetrating, and positions of the battery-cell-polarity observing holes correspond to pole-column identification positions of battery cells; welding area holes are formed in the first layer of base material of the busbar body, positions of the battery-cell-polarity observing holes correspond to pole-column positions of thebattery cells, and welding observing holes are formed in the portions, located in the welding area holes, of the second layer of base material of the busbar body. The busbar has the advantages that the structure is ingenious, the busbar completely fits pole columns of the battery cells, laser welding welding is achieved, and the performance is safe and stable; the busbar is formed through stamping and bending of the single layer of base material, the cost is low, the requirement of the high-rate discharging module can be met, the processing labor hour is short, manpower and material resourcesare saved, dissipation is reduced, and batch and automatic production can be achieved.

Description

technical field [0001] The invention relates to the field of bus bars, in particular to a bus bar of a high rate discharge module. Background technique [0002] With the adjustment of the national new energy vehicle policy, the subsidy standard is gradually reduced compared with previous years. In the case of reduced state subsidies, in order to meet market demand, maintaining or reducing the price of complete vehicles will be the development trend of new energy vehicles in the future. Driven by such market requirements, while ensuring the normal functions of each component of the battery pack, the low cost of each component is currently a development direction that many manufacturers are vigorously researching. The bus bar is the basic conductor for the series and parallel connection between the cells. As one of the important parts of the electric vehicle battery pack, its importance is self-evident. How to ensure that the busbar can withstand high-rate and high-current p...

AI Technical Summary

Problems solved by technology

If a low-power laser welding machine is used, the thicker substrate cannot be penetrated and welded; if a high-power laser welding machine is selected, the thicker substrate of the busbar can be penetrated, but the heat during welding will cause damage to the battery core. Therefore, the common practice is to mill the welding position of the base material thinly. This process has great waste and loss in manpower, materials, equipment and other aspects. It is expensive, and it is not easy to mass-produce and automate production.

At the same time, the traditional flat busbar is not conducive to the complete fit of the busbar and the battery pole, and laser welding may cause virtual welding, which poses a safety hazard

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