Power battery cooling structure and power battery thermal management system

Abstract

The invention discloses a power battery cooling structure and a power battery thermal management system. The power battery cooling structure comprises a power battery and a water jacket, wherein the power battery forms a module by a plurality of battery monomers, gaps are formed among the battery monomers in the module, the water jacket passes through the gaps and is wound in the module, the water jacket is provided with a pipe cavity, a water inlet and a water outlet are formed at the two ends of the pipe cavity, and the water jacket is provided with an outer surface which can be in close contact with the battery monomers. The power battery thermal management system comprises the above power battery cooling structure, a controller, a water cooling loop, temperature sensors and a water pump, wherein the temperature sensors and the water pump are arranged on the water cooling loop, the water inlet and the water outlet of the water jacket in the power battery are accessed to the water cooling loop, on the water cooling loop, the temperature sensors are arranged in and outside the module of the power battery, and the temperature sensors and the water pump both are connected with the controller. By the power battery cooling structure and the power battery thermal management system, heat exchange of the interior of batteries can be fully carried out, the batteries work in a reasonable temperature range, the charging and discharging ability and the cruising ability of a battery pack are improved, and the service lifetime of the battery pack is prolonged.

Description

technical field [0001] The invention is used in the technical field of battery cooling, and in particular relates to a power battery cooling structure and a power battery thermal management system. Background technique [0002] Power battery is one of the core components of electric vehicles and the power source of the whole vehicle. The power battery is generally composed of battery cells to form a module, and then the module is assembled into a battery pack. When the entire battery pack is charged and discharged, its working efficiency, service life and safety performance are all affected by the temperature. The temperature must be controlled reasonably, and the temperature difference between the battery modules and the temperature difference between the battery cells. If any value exceeds the reasonable range, it will affect the entire battery pack. The working efficiency of the battery pack may cause the battery pack to fail, or even cause safety problems. [0003] At ...

AI Technical Summary

Problems solved by technology

The disadvantages of the above solution are: 1. Due to the limited source of cooling air, its function is only to cool the battery, and the temperature cannot be controlled within a certain range; 2. The temperature difference between the modules cannot be controlled, and the temperature of the module that the wind passes first is low. 3. It is impossible to control the temperature difference of the battery cell. The temperature of the battery cell passing by the wind is low, and the temperature of the battery cell passing by no wind is high; 4. The heat exchange of the battery is not sufficient. Due to the influence of the internal space of the battery pack, it may It will cause uneven weight distribution, resulting in insufficient heat exchange of the battery; 5. The liquid cold plate structure has a small contact area with the battery, low heat exchange efficiency, and a large temperature difference between the two sections of the battery

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