Detection circuit for high-voltage direct-current contactor of electric vehicle
A high-voltage direct current, electric vehicle technology, applied in the direction of circuit breaker testing, instruments, measuring electricity, etc., can solve problems such as inability to connect, achieve the effects of troubleshooting, easy promotion and use, and convenient, fast and accurate detection
Pending Publication Date: 2019-04-16
WUXI INST OF COMMERCE
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Problems solved by technology
[0002] At present, electric vehicles adopt the high-voltage DC high-power power supply method. The high-voltage DC contactor controls the high voltage through low voltage, which can effectively protect the high-voltage components and personal safety. The common faults of the high-voltage DC contactor are sintering and failure to connect. At present, there is no very Well, a handy way to detect contactor failure
Method used
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[0009] figure 1 As shown, a detection circuit for a high-voltage DC contactor of an electric vehicle is disclosed, including a power battery pack, and the power battery pack includes a negative contactor 1, a first power battery 2, and a first voltage-dividing contactor 3 that are electrically connected in sequence , the second power battery 4, the second voltage divider contactor 5, the third power battery 6 and the positive contactor 7; the output end of the positive contactor 7 is connected to the input end of the high voltage electric control assembly through the main contactor 9 , the output end of the high-voltage electric control assembly is connected to the negative contactor 1; a capacitor is arranged between the positive and negative poles of the high-voltage electric control assembly; it also includes a pre-charging 8 and a pre-charging contactor 10, the The pre-charging resistance 8 and the pre-charging contactor 10 are connected in parallel with the main contactor...
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The invention discloses a detection circuit for the high-voltage direct-current contactor of an electric vehicle. The detection circuit comprises a power battery pack; the power battery pack comprisesa negative pole contactor, a first power battery, a first voltage division contactor, a second power battery, a second voltage division contactor, a third power battery and a positive pole contactorwhich are electrically connected with one another sequentially; the output end of the positive pole contactor is connected with the input end of a high-voltage electronic control assembly through a main contactor; the output end of the high-voltage electronic control assembly is connected with the negative pole contactor; and a capacitor is disposed between the positive pole and negative pole of the high-voltage electronic control assembly. The circuit of the invention can quickly and accurately detect the high voltage direct-current contactor of the automobile and quickly eliminate faults.
Description
technical field [0001] The invention relates to a detection circuit of a high-voltage DC contactor of an electric vehicle. Background technique [0002] At present, electric vehicles adopt the high-voltage DC high-power power supply method. The high-voltage DC contactor controls the high voltage through low voltage, which can effectively protect the high-voltage components and personal safety. The common faults of the high-voltage DC contactor are sintering and failure to connect. At present, there is no very Well, handy way to detect contactor failure. Contents of the invention [0003] The object of the present invention is to provide a detection circuit for a high-voltage DC contactor of an electric vehicle in view of the defects in the prior art. [0004] In order to achieve the above object, the present invention adopts the following technical scheme: a detection circuit of a high-voltage DC contactor for an electric vehicle, including a power battery pack, and the p...
Claims
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Login to View More IPC IPC(8): G01R31/327
CPCG01R31/3272G01R31/3275Y02T10/70
Inventor 龚文资吴书龙王斌杨丽
Owner WUXI INST OF COMMERCE