Lithium ion soft package battery

Abstract

The invention discloses a lithium ion soft package battery, which comprises a package bag, a positive tab, a negative tab and a battery cell contained in the package bag, wherein the positive tab andthe negative tab independently extend out of the package bag; the battery cell comprises an positive electrode plate, a negative electrode plate and a diaphragm, wherein the positive electrode plate and the negative electrode plate are mutually coiled or overlapped, and the diaphragm is arranged between the positive electrode plate and the negative electrode plate; the positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer coated to the positive electrode current collector; and a negative electrode plate comprises a negative electrode current collector and a negative electrode active substance layer coated to the negative electrode current collector. The battery is characterized in that the positive electrode plate or / and the negative electrode plate are independently provided with a heat conduction and heat collection body, wherein the heat conduction and heat collection body is a current collector characterized in that the front side or / and the reverse surface of the positive electrode current collector or / and the negative electrode current collector are locally not coated with an active material layer, and theheat conduction and heat collection body is connected with a heat exchange device. By use of the battery, the problem of overhigh or overlow battery temperature and the like can be effectively solved.

Description

[0001] (1) Technical field [0002] The invention relates to a lithium ion battery, in particular to a lithium ion soft pack battery. [0003] (2) Background technology [0004] 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...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a lithium-ion pouch battery, which can effectively solve the problems of excessively high or low battery temperature

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