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Direct-current charging heating control method, device and circuit, vehicle and storage medium

A DC charging and heating control technology, which is applied in the field of circuits, vehicles and storage media, devices, and DC charging and heating control methods, can solve the problems of main relay load disconnection and relay adhesion, so as to improve safety and avoid relay adhesion Effect

Active Publication Date: 2020-04-03
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in the process of DC charging and heating, there may be repeated startups or jumps to the charging process at any time. If the main relay and the charging relay are not properly controlled, it is easy to cause the main relay to be disconnected under load and not pre-charged. In case of pull-in, resulting in the problem of relay adhesion

Method used

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  • Direct-current charging heating control method, device and circuit, vehicle and storage medium
  • Direct-current charging heating control method, device and circuit, vehicle and storage medium
  • Direct-current charging heating control method, device and circuit, vehicle and storage medium

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Embodiment 1

[0044] figure 1 It is a flow chart of a DC charging and heating control method provided in Embodiment 1 of the present invention. This embodiment is applicable to the situation of controlling the DC charging and heating of power batteries in electric vehicles. The method can be controlled by a DC charging and heating control device For execution, the device may be implemented in the form of software and / or hardware, and the device may be configured in a controller in the vehicle, such as a motor controller. Such as figure 1 As shown, the method may specifically include:

[0045] S110. Obtain a heating instruction of the power battery.

[0046] Wherein, the power battery may be a battery configured on an electric vehicle, and the specific type and quantity are not limited in this embodiment. The heating command is used to control the power battery for charging and heating.

[0047] Specifically, when the power battery needs to be charged and heated, the heating instruction ...

Embodiment 2

[0066] figure 2 It is a flowchart of a DC charging heating control method provided in Embodiment 2 of the present invention. In this embodiment, on the basis of the above embodiments, the above-mentioned DC charging and heating control method is further optimized. Correspondingly, such as figure 2 As shown, the method of this embodiment specifically includes:

[0067] S201. Obtain a heating instruction of the power battery.

[0068] S202. Acquiring status information of the vehicle.

[0069] Wherein, the status information may include status signals of various devices in the vehicle. In this embodiment, the type of information included in the state information is not limited, and may be determined according to actual conditions. For example, the state information may include the state signal of the gear position of the vehicle, the state signal of the ignition switch, the state signal of the charging port, and the like.

[0070] S203. Determine whether the vehicle sati...

Embodiment 3

[0089] image 3 It is a schematic structural diagram of a DC charging and heating control device provided in Embodiment 3 of the present invention. This embodiment is applicable to the situation of controlling the DC charging and heating of a power battery in an electric vehicle. The DC charging and heating control device provided in the embodiment of the present invention can execute the DC charging and heating control method provided in any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method.

[0090] The device specifically includes an instruction acquiring module 310, a charging and heating module 320, a current acquiring module 330, and a charging and heating end module 340, wherein:

[0091] An instruction acquiring module 310, configured to acquire a heating instruction of the power battery;

[0092] The charging and heating module 320 is used to close the main positive relay and the charging rel...

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Abstract

The embodiment of the invention discloses a direct-current charging heating control method, device and circuit, a vehicle and a storage medium. The method comprises: acquiring a heating instruction ofa power battery; if the state of the main positive relay is an off state, closing the main positive relay and the charging relay to perform direct-current charging heating; when the direct-current charging heating is completed, obtaining the loop current; and if the loop current is determined to be smaller than the safety belt load cut-off current of the main positive relay, disconnecting the main positive relay and the charging relay. According to the technical scheme of the embodiment of the invention, judgment of the state and the current of the main positive relay is added in the processof direct-current charging and heating of the power battery, so that the problem of relay adhesion caused by on-load disconnection of the main positive relay and pull-in under the condition of no pre-charging can be avoided, and the safety in the direct-current charging and heating process is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of electric vehicle charging, and in particular to a DC charging heating control method, device, circuit, vehicle and storage medium. Background technique [0002] When electric vehicles are in cold weather, the charging efficiency of the power battery is very low, or even impossible to charge. In order to ensure that the electric vehicle can be charged and used normally in the cold winter, it is necessary to charge and heat the power battery before charging. [0003] In the prior art, in the process of DC charging and heating, there may be repeated startups or jumps to the charging process at any time. If the main relay and the charging relay are not properly controlled, it is easy to cause the main relay to be disconnected under load and not pre-charged. Under the circumstances, the pull-in will cause the problem of relay adhesion. Contents of the invention [0004] Embodiments of...

Claims

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Application Information

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IPC IPC(8): B60L58/27B60L3/00
CPCB60L3/0053B60L2240/545B60L58/27Y02T10/70
Inventor 宋芳张宇鹏姜瑞王微
Owner CHINA FIRST AUTOMOBILE
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