Electric vehicle battery temperature management system based on mixing of composite phase change material and liquid cooling

Abstract

The embodiment of the invention discloses an electric vehicle battery temperature management system based on liquid cooling and composite phase change material mixing. The battery temperature management system comprises a composite phase change material, a battery box body and a heat exchange system. The lithium ion battery columns are arranged in the battery box body in a layered and staggered manner, vertical snakelike three-layer hollow metal plates are arranged among the layers, and the outer layer is a phase-change material filling shell layer; and the middle layer is a heat exchange fluid channel and is communicated with the corresponding hollow box wall. According to the battery temperature management system, temperature monitoring is conducted through the temperature sensors near the electrodes, the real-time temperature can be transmitted to the vehicle-mounted electronic control unit ECU, then heat preservation treatment can be conducted on the battery through the heat exchange system when the temperature of the battery is too high or too low, the battery is made to be within the constant temperature range, and the battery temperature management system has wide application prospects. The battery temperature management system has the main technical characteristics of high heat conduction efficiency, uniform temperature distribution and stable temperature control effect.

Description

technical field [0001] The invention belongs to the field of electric vehicle battery temperature management, and in particular relates to a battery temperature management technology based on the mixing of composite phase change materials and liquid cooling. Background technique [0002] At present, the main type of battery used in new energy electric vehicles on the market is lithium-ion power battery, mainly due to its advantages such as high power output and long service life. However, lithium batteries have an unavoidable disadvantage. Their performance is greatly affected by temperature, especially lithium batteries with large capacity and high power used in electric vehicles. The space in the car is limited, and the battery packs are placed densely, so the heat accumulated in the middle area must be more, and relatively, the heat in the edge area is less. In addition, when the vehicle is driven and operated under different conditions, the discharge rate of the battery...

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Problems solved by technology

[0004] Patent No. 201810353789.7 "An Integrated Thermal Management System for Electric Vehicles Based on Phase Change Materials" has designed a heating system for the coolant in the conduit, but the system does not evenly dissipate heat or heat the battery

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