High-voltage pre-charging circuit for electric vehicle
A pre-charging circuit, electric vehicle technology, applied in electric vehicles, electrical devices, electrical components, etc., can solve the problem of increasing the complexity of the control strategy, the number of contactors and pre-charging circuits used, the unreasonable setting of the pre-charging circuit, and the high-voltage contact The problem of device adhesion and other problems can be reduced to achieve the effect of reducing hidden dangers, improving safety and high integration
Inactive Publication Date: 2018-07-27
BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD
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Problems solved by technology
Before the high voltage is powered on, if it is not pre-charged, it will cause the high-voltage contactor to stick, burn the insurance, etc.
Unreasonable setting of the pre-charging circuit will increase the complexity of the control strategy and the number of contactors and pre-charging circuits used
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[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
[0017] Such as figure 1 As shown, a high-voltage pre-charging circuit for an electric vehicle according to an embodiment of the present invention includes a power supply, and the positive pole of the power supply is respectively connected to the right end of the direct charging relay 1, the right end of the main positive relay 2, and the DC / DC inverter The positive pole of the inverter 15 and the positive pole of the A / C compressor controller inverter 13, the left end of the direct charging r...
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The invention discloses a high-voltage pre-charging circuit for an electric vehicle. The circuit comprises a power supply, a direct charging relay, a main positive relay, a DC / DC inverter, a compressor controller inverter, a DC charging port, a heating relay and an MCU inverter, wherein the heating relay is connected with a positive electrode of an air conditioning system, a negative electrode ofthe power supply is connected with the right end of a main negative relay and the right end of a pre-charging resistor, the pre-charging resistor is connected with a main negative pre-charging relay,the main negative pre-charging relay is connected with the left end of the main negative relay and the right end of a current sensor, the left end of the current sensor is connected with a negative electrode of the DC charging port, a negative electrode of the MCU inverter, a negative electrode of the air conditioning system, a negative electrode of the DC / DC inverter and a negative electrode of an A / C compressor controller inverter. The high-voltage pre-charging circuit has the benefits as follows: multiple high-voltage part bus capacitors can be pre-charged through one pre-charging circuit,so that use of high-voltage contactors is reduced, the potential safety hazard is reduced, the safety is greatly improved, and besides, the cost is saved.
Description
technical field [0001] The invention relates to the technical field of precharging circuits, in particular to a high-voltage precharging circuit for electric vehicles. Background technique [0002] High-voltage components of pure electric vehicles: MCU inverters, compressor controller inverters, and DC / DC inverters all have bus capacitors. Before the high voltage is powered on, if it is not pre-charged, it will cause adhesion of the high-voltage contactor and burn the insurance. An unreasonable setting of the pre-charging circuit will increase the complexity of the control strategy and the number of contactors and pre-charging circuits used. [0003] Based on the above reasons, the present invention proposes a high-voltage pre-charging circuit for electric vehicles. Contents of the invention [0004] In view of the above-mentioned technical problems in the related art, the present invention proposes a high-voltage pre-charging circuit for electric vehicles, which can ove...
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IPC IPC(8): B60L3/00H02M1/00
CPCB60L3/00H02M1/00Y02T10/72
Inventor 杨雪晓张君鸿郭齐杰郭涛郝月茹王菲王勇
Owner BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD