A heating control method and device for a power battery before charging, and a charger
A power battery and heating control technology, applied in the field of power battery heating control and charger before charging, can solve the problems of increased charging time, unadjustable heating power of the heating film, and the heating system cannot work normally, so as to increase the robustness of the system. Effect
Active Publication Date: 2022-06-21
BEIJING ELECTRIC VEHICLE
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Problems solved by technology
[0006] The embodiment of the present invention provides a power battery heating control method, device and charger before charging to solve the problem that the heating power of the heating film in the prior art cannot be adjusted, which leads to the failure of the heating system to work normally under the premise that the power battery cannot be discharged. During the charging process, when the power of the heating film exceeds the power of the power supply equipment, the charging time will increase due to the discharge of the power battery or the problem that only high-power power supply equipment can be used
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[0041] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0042] The present invention aims at the unadjustable heating power of the heating film in the prior art, which causes the heating system to fail to work normally under the premise that the power battery cannot be discharged, and when the power of the heating film exceeds the power of the power supply equipment during the charging process, the discharge of the power battery causes the discharge of the power battery. To solve the problem that the charging time will increase or only high-power power supply equipment can be used, a method, a device and a charger for controlling the heating of a power battery before charging are provided.
[0043] like figure 1 As shown, the power battery heating control method before charging according to the embo...
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The invention provides a power battery heating control method, device and charger before charging, and relates to the field of power battery heating control. The pre-charging power battery heating control method includes: obtaining the power supply parameters of the power supply equipment, the charging parameters of the on-board charger and the resistance of the heating film; according to the charging parameters of the on-board charger, determining that the power battery pack needs to be heated before charging; judging whether it is necessary Enter the voltage regulation mode to heat the power battery pack before charging; when it is determined that the voltage regulation mode needs to be entered, adjust the output voltage of the power supply device according to the power supply parameters of the power supply device, the charging parameters of the vehicle charger and the resistance of the heating film , to obtain the adjusted voltage; according to the adjusted voltage, the power battery is heated to the cut-off temperature. In the embodiment of the present invention, the method of adjusting the power of the heating film of the power battery by means of output voltage regulation not only ensures the stability of the heating of the power battery, but also increases the robustness of the system.
Description
technical field [0001] The invention relates to the field of power battery pack heating, in particular to a power battery heating control method, device and charger before charging. Background technique [0002] With the increasing scarcity of energy, new energy vehicles have become the choice and development trend of more and more people. As an important part of electric vehicles, the performance of batteries in all aspects needs to be further improved. The current technological trend leads to the increasing power of the power battery, and the requirements for the heating rate are also getting higher and higher, so the power of the heating film is getting higher and higher. Even the power of some heating films has reached 3.1kW, which is twice the power of the minimum AC power supply equipment specified by the national standard. [0003] At present, the power battery heating device is generally a battery heating sheet attached to the power battery and the power battery, wh...
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IPC IPC(8): B60L58/27B60L53/62
CPCB60L58/27B60L53/62Y02T10/7072Y02T90/12
Inventor 刘文月王伟代康伟梁海强易迪华
Owner BEIJING ELECTRIC VEHICLE