High voltage circuit, method and system for reducing electromagnetic interference

Abstract

The invention discloses a high voltage circuit, method and system for reducing electromagnetic interference. The method for reducing the electromagnetic interference comprises the steps of dividing multiple boxes of batteries into two groups and correspondingly arranging the batteries in two parallel lines in sequence; correspondingly connecting anodes and cathodes of the first line of batteries with anodes and cathodes of the second line of batteries in series in sequence; connecting the battery, which is close to one side of a load in a vehicle, in the first line of batteries and has the unconnected anode / cathode, with the battery, which is close to one side of the load in the second line of batteries and has the unconnected anode / cathode; connecting the battery, which is far away fromone side of the load in the first line of batteries and has the unconnected cathode / cathode, with an output end / an input end of the load; and connecting the battery, which is far away from one side ofthe load in the second line of batteries and has the unconnected anode / cathode, with the input end / output end of the load. According to the high voltage circuit, method and system for reducing the electromagnetic interference, as the wiring of the high voltage circuit adopts a common mode rejection principle, the interference of electromagnetic noise, generated during battery discharging, to a low voltage control signal and a CAN bus is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of electromagnetic interference shielding, in particular to a high-voltage circuit, method and system for reducing electromagnetic interference. Background technique [0002] The high-voltage positive and negative poles of the existing high-voltage wiring harness wiring form a "big ring". When the battery is discharged, the electromagnetic interference in the entire ring area is relatively serious, causing electrical equipment on the vehicle, such as radio, GPS positioning, intelligent scheduling, and CAN bus. Communications, etc. cannot work normally, and the electrical system of the vehicle is not in a stable operating state, prone to failures, and it is difficult to analyze and solve failures, which increases service and operating costs. [0003] Such as figure 1 As shown, the positive and negative series of 6 boxes of batteries in the middle of the car form a "big circle". When the battery is discharged...

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