Battery pack heating device, heat storage device and electric vehicle

Abstract

The invention discloses a battery pack heating device which can be applied to an electric vehicle. The battery pack heating device includes a battery pack system and a heat supply system, wherein thebattery pack system is used for heating a battery pack, the heat supply system includes at least a heating element and a first heat storage device, a reversing valve is arranged between the battery pack system and the heat supply system, the reversing valve is used for controlling on and off of the battery pack system and the heat supply system, in an off state, heat generated by the heating element can be stored in the first heat storage device, in an on state, the heat stored in the first heat storage device can be utilized to heat the battery pack, the extra heat generated by the heating element is utilized to heat the battery pack, and thereby an environmental friendly energy-saving battery pack heating scheme is proposed.

Description

technical field [0001] The present application relates to the field of mechanical technology, in particular to a battery pack heating device, a heat storage device and an electric vehicle. Background technique [0002] With the promotion of electric vehicles, electric vehicles will be used in more and more environments. When electric vehicles run in winter in cold regions, it will be difficult to charge the battery at low temperature. Due to the difficulty of charging the battery at low temperature, In turn, there will be insufficient power to support the start of the electric vehicle, which will make it difficult to start the electric vehicle at low temperature. After starting, there will be problems such as low battery life and weak battery life. Since the chemical power source itself is relatively sensitive to temperature, it is difficult to solve the above problems by changing the battery material itself and relying on changing the battery itself. [0003] In order to i...

AI Technical Summary

Problems solved by technology

[0002] With the promotion of electric vehicles, electric vehicles will be used in more and more environments. When electric vehicles run in winter in cold regions, it will be difficult to charge the battery at low temperature. Due to the difficulty of charging the battery at low temperature, In turn, there will be insufficient power to support the start of the electric vehicle, which will make it difficult to start the electric vehicle at low temperature. After starting, there will be problems such as low battery life and weak battery life.

Since the chemical power source itself is relatively sensitive to temperature, it is difficult to solve the above problems by changing the battery material and relying on changing the battery itself.

[0003] In order to improve the application ability of electric vehicles in cold regions, it is proposed in the prior art to use PTC heaters to heat the battery pack to increase the temperature of the battery pack, thereby solving the difficulties of low-temperature charging, low-temperature starting of electric vehicles, and shortened cruising range. question

[0004] However, the heating method using PTC heaters provided in the prior art not only has the problem of slow heating, but also consumes a lot of heat. Therefore, it is urgent to introduce a more environmentally friendly and energy-saving battery pack heating solution.

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