Battery pack with constant temperature function

Abstract

The invention discloses a battery pack with a constant temperature function. The battery pack comprises a battery module, an anode circuit connecting zone, a cathode circuit connecting zone, and a thermal material for coating the battery module, wherein the battery module comprises a plurality of batteries which are arranged in parallel; each battery is provided with an anode and a cathode which are arranged oppositely; the anode circuit connecting zone and the cathode circuit connecting zone are respectively connected with the anode and the cathode of the battery module; the thermal materialhas phase change at set temperature; heat can be absorbed or released at phase change temperature, and at the same time constant temperature is maintained; if external temperature is changed and exceeds upper limit temperature I, the thermal material has phase change, the heat is absorbed, the constant temperature is maintained, and furthermore the batteries do not exceed the upper limit temperature; when the external temperature is changed and exceeds lower limit temperature II, the thermal material has phase change, the heat is released, the constant temperature is maintained, and furthermore the batteries do not exceed the lower limit temperature.

Description

technical field [0001] The invention relates to a power battery used in an energy storage system of a new energy vehicle, in particular to a battery pack with a constant temperature function. Background technique [0002] As the energy storage system of new energy vehicles, the power battery has the problem of insufficient performance or even unusability in hot and cold environments. The narrow operating temperature range of the battery is the key factor for these problems. Affected by the external temperature, the heat source in the car and the thermal effect of the battery itself, the battery temperature often cannot be effectively controlled, resulting in overcooling or overheating problems. In this case, the start-up, mileage, power performance, energy conversion rate and life of new energy vehicles will rapidly decay. Solving the above problems is of great significance for the marketization and industrialization of new energy vehicles. Contents of the invention [...

AI Technical Summary

Problems solved by technology

Affected by the external temperature, the heat source in the car and the thermal effect of the battery itself, the battery temperature often cannot be effectively controlled, resulting in overcooling or overheating problems

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