A liquid-cooled pure electric vehicle lithium battery thermal management device

Abstract

The invention discloses a liquid-cooled pure electric vehicle lithium battery heat management device, including a battery box, a battery box cover, a first heat pipe, a second heat pipe and a phase change material; the first heat pipe is evenly distributed in the battery box inside the body, and is fixedly connected with the bottom end of the battery case; the battery accommodation cavity is formed in the first heat conduction tube, and the first cooling channel is formed in the tube wall of the first heat conduction tube; the second heat conduction tube is arranged outside the first heat conduction tube, and is connected with the A second cooling channel is formed between the battery boxes; the second heat pipe is filled with phase change material. The present invention directly arranges the first cooling channel on the outside of the battery, and fills the phase change material outside the first cooling channel. On the one hand, it can first dissipate heat through the cooling liquid, and then transfer the heat to the phase change material, so that the device can quickly cool down. On the other hand, when the battery temperature is too high and the liquid cooling is turned on, the barrier between the battery and the cooling liquid can be reduced, the heat dissipation efficiency can be further improved, and the energy consumption can be reduced.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a liquid-cooled pure electric vehicle lithium battery thermal management device. Background technique [0002] Lithium batteries are widely used in electric vehicles due to their superior performance. Due to the limited space in the battery box, the battery pack modules connected in series and parallel will generate a lot of heat during charging and discharging. If the battery pack modules cannot be dissipated and cooled in time, it will be easy This will lead to a sharp rise in battery temperature and uneven temperature distribution among single cells, which will affect the performance and cycle life of the battery, and even cause thermal runaway of the battery. Currently, the battery cooling methods mainly include air cooling, liquid cooling, and phase change material cooling. Wait. Air cooling and liquid cooling require additional energy-consuming components such as...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, propose a liquid-cooled pure electric vehicle lithium battery thermal management device, and solve the technical problems of high energy consumption and poor heat dissipation of the existing battery thermal management system in the prior art

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