Pure electric vehicle power battery cooling and heating device with liquid cooling plate

Abstract

The invention discloses a pure electric vehicle power battery cooling and heating device with a liquid cooling plate. The cooling and heating device comprises a plurality of battery modules which are connected in series and parallel to form a power supply, the cooling plate, a radiator, an electronic fan, a water pump and a cooling pipeline. When a pure electric vehicle works under a relatively sever hot environment, the whole body of each battery module can be effectively cooled by the device; when the pure electric vehicle works under a low-temperature environment, the battery modules can be effectively heated by the device. Besides, the temperatures of all the batteries are distributed evenly, so that the optimum running condition of the vehicle is achieved. The large-scaled production of the radiator and the electronic fan is achieved already, so that the cost of the device is low. In addition, due to the use of the cooling plate, a liquid can be prevented from being directly in contact with the batteries and consequently potential safety hazards are avoided; if one single battery discharges unsuccessfully, the battery can be very conveniently replaced.

Description

technical field [0001] The invention relates to a pure electric vehicle power battery, in particular to a pure electric vehicle power battery cooling and heating device with a liquid cooling plate. Background technique [0002] After all, electric vehicles are means of transportation in an all-weather environment. When the battery is charged and discharged in a high-temperature environment, due to untimely and uneven heat dissipation, the local temperature of the battery pack rises rapidly and serious accidents occur. However, when the power battery is in a low-temperature environment, the charging and discharging performance of the battery will be significantly reduced, and it may even fail to work normally. Therefore, the power battery thermal protection device including power battery heat dissipation function and heating function is an important condition to ensure the normal operation of electric vehicles under all-weather conditions. According to different heat transf...

AI Technical Summary

Problems solved by technology

For example, when an electric vehicle works under high-speed and heavy-load conditions, the power battery will work in a harsh thermal environment. If only relying on air cooling, it will be difficult to control the optimal working temperature of the battery, and at the same time, the temperature between the batteries cannot be guaranteed. Consistency of the battery, resulting in degraded battery performance, shortened battery life and reduced overall vehicle performance, and inefficient use of air for heating

Therefore, in order to make the electric vehicle power battery work at a better ambient temperature, it is necessary to consider the use of efficient liquid cooling and heating methods to optimize the temperature performance of the battery. Due to the high heat transfer efficiency of general liquid cooling devices, the occupied volume is small, but compared with air Cooling is more complex and costly, so it is necessary to develop an efficient, compact, and low-cost pure electric vehicle power battery cooling and heating device with a liquid cooling plate

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