Battery temperature control device

Abstract

The present invention relates to the technical field of lithium batteries, in particular to a battery temperature control device, which includes a battery module, a first heat exchanger, a second heat exchanger for exchanging heat with the battery module, and a pump for pumping a heat-conducting medium; The output end of the first heat exchanger is connected to the input end of the second heat exchanger, the output end of the second heat exchanger is connected to the input end of the pump, and the output end of the pump is connected to the input end of the first heat exchanger, The first heat exchanger, the second heat exchanger and the pump form a loop for circulating the heat transfer medium; in addition, it also includes a semiconductor refrigerator exchanging heat with the first heat exchanger. The present invention uses a combination of a semiconductor refrigerator and a heat pipe to control the temperature of multiple single cells. The semiconductor refrigerator itself is also powered by multiple single cells. Under the premise of limited power of the rechargeable battery, it can achieve the effect of low power consumption and energy saving. Moreover, semiconductor refrigerators and heat pipes are common devices, which are easy to purchase and low in cost.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a battery temperature control device. Background technique [0002] Secondary battery products are extremely sensitive to ambient temperature due to the technical principle of electrochemical reaction. When the temperature is too low, its chemical activity decreases, resulting in a significant decrease in the effective capacity of the battery or even failure to charge and discharge. In severe cases, it will also cause irreversible changes in the battery electrolyte and positive and negative electrode structures, seriously affecting battery life. When the temperature is too high, although the battery activity is enhanced, the danger also follows. Charging and discharging at high temperature will cause the internal pressure of the battery to rise, and serious accidents such as battery explosion and fire will occur. [0003] For example, the ambient temperature of lithiu...

AI Technical Summary

Problems solved by technology

[0005] The Chinese patent application number 201210182342 uses a semiconductor cooler to control the temperature of the secondary battery. The patent only proposes to use a semiconductor cooler to control the temperature of the lithium battery, but how to maintain the consistency of multiple single batteries and how to Specific issues such as allowing the cooling medium to transfer heat to each Li-ion battery are not resolved

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