A high-voltage leakage protection circuit for electric vehicles and its control method
A technology for electric vehicles and protection circuits, applied in electric vehicle charging technology, electric vehicles, emergency protection circuit devices, etc., can solve the problem that high-voltage leakage protection cannot meet the needs of electric vehicles, achieve the protection of personal and equipment safety, reduce System volume, small volume effect
Active Publication Date: 2017-11-07
HEFEI JUYI POWER SYST CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to solve the defect that the high-voltage leakage protection in the prior art cannot meet the needs of electric vehicles, and provide a high-voltage leakage protection circuit for electric vehicles and its control method to solve the above problems
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[0024] In order to have a further understanding and understanding of the structural features of the present invention and the achieved effects, the preferred embodiments and accompanying drawings are used for a detailed description, as follows:
[0025] like figure 1 As shown, a high-voltage leakage protection circuit for electric vehicles described in the present invention includes a monitored component 7, a DC-DC power supply module 4, a communication module 5 and an FPGA module 6, and the monitored component 7 is required in practical applications. Components for high-voltage leakage protection, such as electric vehicle controllers, can of course also be other key components. The DC-DC power supply module 4 is a power supply device for the protection circuit and the monitored component 7, and provides power supply for it, while the DC-DC power supply module 4 receives electric power from the vehicle body high-voltage power supply 8 on the electric vehicle, that is, the vehi...
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The invention relates to a high-voltage leakage protection circuit for an electric vehicle and a control method thereof, which solves the defect that the high-voltage leakage protection cannot meet the use requirements of the electric vehicle compared with the prior art. In the present invention, the input end of the high-voltage detection module is connected with the output end of the monitored component, the detection signal output end of the high-voltage detection module is connected with the detection signal input end of the FPGA module, and the control signal output end of the FPGA module is connected with the signal input of the high-voltage protection module. The CAN communication interface of the FPGA module is connected to the CAN communication interface of the communication module, and the high-voltage protection module is connected in series to the transmission circuit between the high-voltage power supply of the vehicle body and the DC‑DC power supply module. The invention can timely and effectively detect high-voltage leakage, and quickly execute a protection scheme when detecting the hazard of high-pressure leakage.
Description
technical field [0001] The invention relates to the technical field of high-voltage protection circuits, in particular to a high-voltage leakage protection circuit for electric vehicles and a control method thereof. Background technique [0002] At present, there are still many deficiencies in the safety considerations of electric vehicles. Many safety solutions are based on traditional fuel vehicle designs, and new safety solutions have not been designed in combination with some unique characteristics of electric vehicles. In particular, the power source of electric vehicles adopts a high-voltage battery drive scheme, and its voltage is generally higher than 200V. For electric vehicles driven by high voltage, high voltage is a new and unique feature, which should be considered. High pressure leaks can cause serious safety hazards or cause equipment damage. Especially due to the intensive design of the interior structure of the vehicle, during the long-term use of the vehic...
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IPC IPC(8): B60L3/04H02H3/04
CPCY02T90/16
Inventor 刘蕾王体伟唐旗
Owner HEFEI JUYI POWER SYST CO LTD