Heat conducting lithium-ion battery

Abstract

The invention relates to heat conducting lithium-ion battery, which comprises a battery housing, an electric core, a positive pole lug and a negative pole lug, wherein the positive pole lug and the negative pole lug are arranged at one side or two sides of the electric core body, the battery housing coats outside the electric core, the electric core includes a positive pole piece, a diaphragm anda negative pole piece, the diaphragm is arranged between the negative pole piece and the positive pole piece, the positive pole piece, the diaphragm and the negative pole piece are laminated or woundin sequence to form the electric core, the negative pole piece includes a negative current collector and a negative active material layer coated on the negative current collector, and the positive pole piece includes a positive current collector and a positive active material layer coated on the positive current collector. The heat conducting lithium-ion battery is characterized in that the negative pole piece is provided with heat conducting and collecting bodies, the heat conducting and collecting bodies are parts uncoated with the negative active material layer on the front or / and the backof the negative current collector, at least two heat conducting and collecting bodies are vertically laminated in the same area to form a heat flow concentration channel for heat conduction and collection, and the heat energy constituting the electric core gets in and out of the heat flow concentration channel. The heat conducting lithium-ion battery can effectively solve the problems that the battery temperature is too high or too low and the like.

Description

(1) Technical field [0001] The invention relates to a lithium ion battery, in particular to a heat conduction lithium ion 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 ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a thermally conductive lithium-ion battery, which can effectively solve problems such as excessively high or low battery temperature

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