Lithium ion power battery

A power battery and lithium-ion technology, applied in the field of lithium-ion power batteries, can solve problems such as low temperature and high temperature
CN109935933APending Publication Date: 2019-06-25长沙聚能充新能源有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
长沙聚能充新能源有限公司
Publication Date
2019-06-25

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Abstract

The invention discloses a lithium ion power battery which comprises an electrical core, a metal casing, an electrolyte and a top cover fixedly connected onto the metal casing. The electrical core comprises an anode piece, a cathode piece and a diaphragm; the anode and cathode pieces are provided with anode and cathode taps respectively; the top cover is provided with anode and cathode terminals; the cathode piece comprises a cathode current collector and a cathode active material layer; and the anode piece comprises an anode current collector and an anode active material layer. The battery ischaracterized in that the cathode piece is further provided with heat-conducting heat collectors which are positioned in the part, not coated with the cathode active material layer, of the front sideand / or the back side of the cathode current collector, and provided with a heat exchange device. The problems including that the battery temperature is too high or too low are solved, the temperatureis controlled, the service life of the battery is prolonged, and the production efficiency is improved.
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Description

(1) Technical field

[0001] The invention relates to a lithium ion battery, in particular to a lithium ion power battery. (2) Background technology

[0002] Transportation brings double pressure on energy crisis and environmental pollution. It is urgent to vigorously develop and research efficient, clean and safe new energy vehicles to achieve energy saving and emission reduction. Lithium-ion batteries have become the best candidates for new energy vehicle power systems due to their advantages such as high specific energy, no pollution, and no memory effect. However, lithium-ion batteries are very sensitive to temperature. Only in a suitable temperature range can the battery pack be discharged efficiently and maintain good performance. High temperature will make the aging speed of lithium-ion battery faster, the thermal resistance will increase faster, the number of cycles will be reduced, the service life will be shortened, and even cause problems such as battery thermal ru...

Claims

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