Relay detection method and device and electric vehicle
A detection method and technology for electric vehicles, applied in electric vehicles, electrical devices, vehicle components, etc., can solve the problem of ignoring the adhesion detection of fast charging relays, and achieve the effect of wide fault coverage and low detection false alarm rate.
Pending Publication Date: 2022-06-28
BEIJING ELECTRIC VEHICLE
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Problems solved by technology
[0003] Embodiments of the present invention provide a relay detection method, device, and electric vehicle to solve the problem of neglecting the adhesion detection of fast charging relays in the prior art
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[0041] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided merely to assist in a comprehensive understanding of embodiments of the present invention. Accordingly, it should be apparent to those skilled in the art that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
[0042] It is to be understood that reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic associated with the embodiment is included in at least one...
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The invention provides a relay detection method and device and an electric vehicle, and relates to the technical field of electric vehicles. The relay detection method is applied to the electric vehicle, the positive electrode end of a charging circuit of the electric vehicle is connected with a first charging relay, the negative electrode end of the charging circuit is connected with a second charging relay, and a voltage acquisition element is connected between the first charging relay and the second charging relay. The method comprises the following steps: periodically inputting a switching signal to a switching relay on the charging circuit; acquiring a voltage signal acquired by the voltage acquisition element when the switching relay works according to the switching signal; and detecting the connection state of the first charging relay and the second charging relay according to the voltage signal. Compared with the prior art, the technical scheme of the invention has the advantages of simple detection method, stable signal, low misjudgment rate and lower cost compared with auxiliary contact detection.
Description
technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a relay detection method and device and an electric vehicle. Background technique [0002] The electric vehicle power battery fast charging control circuit is mainly composed of the fast charging positive relay and the fast charging negative relay. The normal opening and closing of these two relays is directly related to whether the power battery can be charged normally and whether the fast charging port is charged in the non-charging mode. , If the fast charging relay sticks under the condition of high voltage power-on, the fast charging port is accidentally charged, which may cause serious injury to personnel. However, the detection of adhesion of the fast charging relay is often neglected in electric vehicles of the prior art. SUMMARY OF THE INVENTION [0003] Embodiments of the present invention provide a relay detection method, device, and electric vehicle, so a...
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Login to View More IPC IPC(8): B60L3/00
CPCB60L3/0023
Inventor 刘嘉
Owner BEIJING ELECTRIC VEHICLE