Battery

Abstract

According to the battery disclosed by the invention, the shoulder A and the shoulder B which are bent outwards are arranged in the middle of the base shell, so that when the battery is heated and gasin the battery expands, the gas can expand towards two ends of a cavity, a pressure relief effect can be achieved, and the phenomenon of telescopic expansion towards two electrodes can be avoided; meanwhile, the heat dissipation area of the shell can be increased, and the heat dissipation capacity is improved; the sealing performance of the battery can be improved by the sealing and flanging process, the strength of the first pole shell and the second pole shell can be improved, and the overall structural strength of the battery is improved; a first pole piece and a second pole piece are woundinto a whole, the upper end face of the first pole piece is electrically connected with a first pole shell, and the lower end face of the second pole piece is electrically connected with a second pole shell; by the adoption of the connecting mode, welding is not needed, the process can be simplified, cost is reduced, and automatic production can be better achieved. Meanwhile, the end surface contact design is adopted, rapid and stable charging and discharging can be achieved, and the cycle life of the battery is prolonged.

Description

【Technical field】 [0001] The invention relates to the field of battery technology, in particular to a battery. 【Background technique】 [0002] Existing batteries generally connect the pole piece and the pole shell through tabs. At present, the tabs and the pole shell are generally connected by welding, but the welding process is relatively complicated, and it is prone to false welding. It is difficult to pass a large current; in addition, the battery will heat up during use and cause expansion. The existing battery is usually designed with a structure that can expand and contract along the direction of the two electrodes, but it is not suitable for some usage scenarios that are sensitive to battery expansion. Suitable for use with this type of battery. In addition, batteries are becoming more and more common in daily life, such as IoT batteries, hearing aid batteries, Bluetooth headset batteries, etc. Due to their small size, battery assembly is becoming more and more diffi...

AI Technical Summary

Problems solved by technology

[0002] Existing batteries generally connect the pole piece and the pole shell through tabs. At present, the tabs and the pole shell are generally connected by welding, but the welding process is relatively complicated, and it is prone to false welding. It is difficult to pass a large current; in addition, the battery will heat up during use and cause expansion. The existing battery is usually designed with a structure that can expand and contract along the direction of the two electrodes, but it is not suitable for some usage scenarios that are sensitive to battery expansion. suitable for use with this type of battery

In addition, batteries are becoming more and more common in daily life, such as IoT batteries, hearing aid batteries, Bluetooth headset batteries, etc. Due to their small size, battery assembly is becoming more and more difficult, the pass rate is low and automation is difficult, and the cost is high.

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