Electric vehicle battery pack temperature control device and control method thereof

Abstract

The invention provides an electric vehicle battery pack temperature control device applied in the technical field of electric vehicle parts, and the invention also relates to a control method for the electric vehicle battery pack temperature control device, the electric vehicle battery pack temperature control device One end of the heat storage heat exchanger (2) is connected to one end of the battery pack (1) through the connecting pipeline I (3), and the other end of the heat storage heat exchanger (2) is connected to the battery pack (1) through the connecting pipeline II (4). The other end is connected, and a connecting pipeline III (9) is set between the connecting pipeline I (3) and the connecting pipeline II (4), and a heat dissipation heat exchanger is arranged on the connecting pipeline III (9) (10 connecting pipeline III ( 9) A heat dissipation channel cut-off valve (11) is arranged on the top. The electric vehicle battery pack temperature control device and control method according to the present invention can make the battery modules in the battery pack be charged and discharged in a temperature range with high efficiency, and improve The input and output efficiency of the battery module improves the service life and cruising range.

Description

technical field [0001] The invention belongs to the technical field of battery pack components for electric vehicles, and more specifically relates to a temperature control device for battery packs of electric vehicles, and also relates to a control method for the temperature control device for battery packs of electric vehicles. Background technique [0002] With the global energy situation becoming more and more tense, and the world's automobile production and sales continue to rise, electric vehicles are becoming more and more popular among governments and people in various countries, and the market share and growth rate of electric vehicles continue to increase. A key technology of electric vehicles lies in the power battery, and the input and output performance, safety and reliability of the power battery are greatly affected by the temperature of the battery cell, so the battery pack thermal management system is particularly important in the design of the electric vehic...

AI Technical Summary

Problems solved by technology

For the low-temperature preheating function of the battery pack, the existing solutions generally use PTC to heat the battery pack coolant or use PTC to directly heat the battery cells to achieve this. The disadvantage of this is that it requires both a high-power PTC electric heating device and The control system consumes the electric energy of the battery itself during preheating. The output current and output efficiency of the battery cell are low during preheating, and the preheating speed is slow. In addition, low-temperature charging and discharging of the battery cell itself will cause great damage to the battery cell itself.

In addition, existing battery pack cooling technologies include air-cooled, liquid-cooled, and direct-cooled. The cooling technology is integrated, and the most configured PTC device is also a relatively independent system. There is no overall technology for the temperature control system, and the degree of integration of the control system is not high.

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