A water heat transfer power battery constant temperature system

Abstract

The invention relates to a water heat-transfer constant temperature system for power batteries. The water heat-transfer constant temperature system comprises a flow metering pump, a heat exchanger, a heat capacity water tank and a power battery pack which are sequentially arranged, wherein the components form a loop through a water pipeline; a second electromagnetic valve and a third electromagnetic valve are arranged at an outlet of the power battery pack in parallel; the second electromagnetic valve is directly connected with the flow metering pump; the third electromagnetic valve is connected with the flow metering pump through a radiator; the heat exchanger is connected with a heat source supply device; the second electromagnetic valve, the third electromagnetic valve, the flow metering pump, the radiator and the heat source supply device are connected with an output end of a control unit respectively; and a temperature sensing probe arranged in the power battery pack is connected with an input end of the control unit. According to the technical scheme, by the constant temperature system for the power batteries, a heat supply mode of is started when the temperature of the power battery pack is too low; and a cooling mode is started when the temperature of the power battery pack is too high, so that the power battery pack always works within a proper temperature range to maximize the performance.

Description

technical field [0001] The invention relates to the field of new energy electric vehicles, in particular to a water heat transfer type power battery constant temperature system. Background technique [0002] At present, because the performance of the power battery is greatly affected by the change of ambient temperature, the domestic new energy electric bus often adopts the structure of air cooling to reduce its temperature, so as to keep the power battery working in a suitable temperature range, but this structure can only give The battery cools down, and when the ambient temperature is too cold, it can't do anything. There is also an electrothermal structure. Although it can ensure that the working temperature of the power battery rises in a low temperature environment, it consumes too much power and has extremely low energy efficiency, which seriously affects the cruising range of the vehicle at low temperature. This state has greatly affected the pace of promoting new e...

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Problems solved by technology

[0002] At present, because the performance of the power battery is greatly affected by the change of ambient temperature, the domestic new energy electric bus often adopts the structure of air cooling to reduce its temperature, so as to keep the power battery working in a suitable temperature range, but this structure can only give The battery cools down, but when the ambient temperature is too cold, there is nothing to do

There is also an electrothermal structure, although it can ensure that the working temperature of the power battery rises in a low temperature environment, but it consumes too much power and has extremely low energy efficiency, which seriously affects the cruising range of the vehicle at low temperature

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