Electric vehicle and its high and low voltage interlock detection circuit
A technology for electric vehicles and detection circuits, applied in electric vehicles, electrical devices, vehicle components, etc., can solve problems such as low efficiency of troubleshooting and maintenance, lack of fault location function, and safety, etc., to shorten troubleshooting and Repair time, improve the efficiency of troubleshooting, and quickly and accurately judge the effect
Active Publication Date: 2017-11-17
BEIJING ELECTRIC VEHICLE
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Problems solved by technology
[0003] When the electric vehicle is powered on, the high-voltage circuit will carry high-voltage electricity above 300V. Once the high-voltage components are exposed, there will be safety hazards. In order to eliminate safety hazards, relevant technicians have proposed a variety of high-voltage and low-voltage interlock detection circuits. , to judge whether the high-voltage circuit is broken
In related technologies, although it is possible to detect whether the high-voltage circuit is open, it lacks the function of locating the fault point, so after the fault occurs, the efficiency of troubleshooting and maintenance is relatively low
Method used
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[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0019] The high and low voltage interlock detection circuit of an electric vehicle according to the embodiments of the present invention and the electric vehicle having the high and low voltage interlock detection circuit are described below with reference to the accompanying drawings.
[0020] figure 1 It is a schematic structural diagram of a high-voltage and low-voltage interlock detection circuit of an electric vehicle according to an embodiment of the present invention. Such as figure 1 As shown, the high and low voltage i...
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The invention discloses a high-voltage and low-voltage interlock detection circuit of an electric vehicle and an electric vehicle having the same. The detection circuit includes: N wire harness terminals, and each wire harness terminal in the N wire harness terminals includes a first low-voltage interlock wire and the second low-voltage interlocking line; a high-voltage interlocking unit, the high-voltage interlocking unit includes N resistors connected in series, a first output terminal and a second output terminal, and each resistor in the N resistors is connected in parallel one by one in each Between the first low-voltage interlocking line and the second low-voltage interlocking line in the wiring harness terminal, and the resistance value of each resistor is different; the detection unit is connected to the first output end and the second output end respectively, and the detection unit is based on Different resistance values output by the high-voltage interlock unit generate corresponding detection signals, and identify the connection state between each high-voltage connector and the corresponding wire harness terminal according to the corresponding detection signals. The detection circuit can quickly and accurately determine the specific position and quantity of the high-voltage connectors where the circuit break occurs.
Description
technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a high and low voltage interlock detection circuit of an electric vehicle and an electric vehicle with the high and low voltage interlock detection circuit. Background technique [0002] Different from traditional cars, electric vehicles use high-voltage power batteries as power sources, matching high-voltage power systems (drive motor systems), power distribution systems, on-board charging systems, air-conditioning and heating systems and other components to realize the driving and high-voltage power of electric vehicles. Charging of batteries and low-voltage lead-acid batteries and temperature regulation in the cabin, etc. Therefore, in electric vehicles or hybrid vehicles, the electrical system is generally divided into high-voltage systems and low-voltage systems. Among them, the low-voltage system can be a 12V power supply system, which can be powered by a 12V lead...
Claims
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IPC IPC(8): B60L3/00
Inventor 李奇
Owner BEIJING ELECTRIC VEHICLE