Power battery heating device and control method of electric vehicle
A technology for power batteries and electric vehicles, applied in the automotive field, can solve the problems of increasing the structure of pure electric vehicles, environmental pollution, etc., and achieve the effects of improving charging and discharging capacity, increasing driving range, and increasing temperature
Active Publication Date: 2019-12-31
CHINA FIRST AUTOMOBILE
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[0004] The purpose of the present invention is to provide a power battery heating device and control method for an electric vehicle, so as to solve the problem existing in the prior art that the use of fuel oil in a low temperature environment increases the structure of a pure electric vehicle and causes environmental pollution
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[0026] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings but not all of them.
[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection;...
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The invention discloses a power battery heating device and a control method of an electric vehicle, and belongs to the technical field of automobiles. The battery heating device includes a heat exchanger, an electric heating mechanism and a circulating pump, and the heat exchanger, the electric heating mechanism and the circulating pump are sequentially connected through a pipeline to form a circulating circuit. The circulating circuit is filled with a working medium, and the heat exchanger can heat a power battery. The power battery heating device further includes a system controller and a driving motor, the system controller is correspondingly and electrically connected with the power battery, the circulating pump, the electric heating mechanism and the driving motor can brake the electric vehicle and recover the braking energy to charge the power battery and / or supply power to the electric heating mechanism. Compared with the prior art, under the condition that the ambient temperature is relatively low and the allowable charging power of the power battery is relatively small, the braking energy can be recovered to charge and heat the power battery, so as to improve the temperature of the power battery, and thus the charging and discharging capacity of the power battery is improved, and the driving range of the electric vehicle is improved.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a heating device and a control method for a power battery of an electric automobile. Background technique [0002] The energy storage device of a pure electric vehicle is a power battery. Due to the limitation of the driving range, the power battery of a pure electric vehicle mainly uses a lithium-ion battery. The disadvantage is that in order to meet the requirements of battery life, the power is limited under low temperature conditions, especially the charging power, the drop is more obvious, and even charging cannot be performed. [0003] In this regard, the previous patent with the application number 201610257591.X disclosed a pure electric vehicle and its power battery heating control system and heating control method. The system includes a heat source device, a circulation loop and a controller. The heat source device includes a fuel tank, an oil pump, and a combustion ...
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IPC IPC(8): B60L58/27B60L7/10
CPCB60L7/10B60L58/27Y02T10/70
Inventor 李川刘建康尹建坤
Owner CHINA FIRST AUTOMOBILE