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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

Pending Publication Date: 2019-06-25
长沙聚能充新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a lithium-ion power battery, which can effectively solve the problems of high or low battery temperature, achieve temperature control, improve battery life and improve production efficiency, etc.

Method used

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Embodiment Construction

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0045] The technical solution of the present invention is: a lithium-ion power battery, including a battery cell, a metal casing for accommodating the battery cell, an electrolyte injected into the metal casing, and a top fixedly connected to the metal casing. Cover; the cell includes a positive electrode sheet, a negative electrode sheet, and a diaphragm spaced between the positive electrode sheet and the negative electrode sheet, and is sequentially laminated or wound to form an electric cell; the positive electrode sheet is provided with a positive electrode lug; The negative pole sheet is provided with a negative pole tab; the top cover is provided with a positive pole pole electrically connected to the positive pole pole, and a negative pole pole electrically connected to the negative pole pole; the negative pole piece includes a negative pole A current ...

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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.

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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Application Information

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IPC IPC(8): H01M10/613H01M10/615H01M10/625H01M10/654H01M10/6551H01M10/655H01M10/0525H01M10/058
CPCY02E60/10Y02P70/50
Inventor 邱伯谦邱则有
Owner 长沙聚能充新能源有限公司
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