Discharging circuit, method, motor controller and electric vehicle
A discharge circuit and voltage conversion circuit technology, which is applied in electric vehicles, vehicle components, electrical devices, etc., can solve the problems of redundant heat and occupying large circuit board space, etc.
Active Publication Date: 2021-07-06
ZHEJIANG GEELY HLDG GRP CO LTD +1
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Problems solved by technology
[0005] The main purpose of the present invention is to provide a discharge circuit, a method, a motor controller and an electric vehicle, aiming to solve the technical problems that the existing passive discharge through a passive discharge resistor will generate redundant heat and occupy a large amount of circuit board space
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[0041] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0042] 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 of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0043] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positi...
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The invention belongs to the technical field of electric vehicles, and discloses a discharging circuit and method, a motor controller and an electric vehicle. The discharging circuit comprises a flyback voltage transformation module and a voltage stabilization module which are connected in sequence, the input end of the flyback voltage transformation module is connected with a device to be discharged, and the output end of the voltage stabilization module is connected with a rear-end circuit; the flyback voltage transformation module receives high-voltage direct-current voltage output by a to-be-discharged device and reduces the high-voltage direct-current voltage so as to output low-voltage direct-current voltage to the voltage stabilization module. The voltage stabilizing module receives the low-voltage direct-current voltage, stabilizes the low-voltage direct-current voltage and outputs the stabilized voltage to a rear-end circuit so as to discharge the electric energy of the device to be discharged. In the invention, a passive discharge resistor is cancelled, the passive discharge requirement is realized by virtue of the flyback transformation module and the voltage stabilization module, continuous redundant heat is not generated after the passive discharge resistor is cancelled, and the problems that the passive discharge mode of the existing passive discharge resistor generates redundant heat and occupies the space of a circuit board are solved.
Description
technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a discharge circuit, a method, a motor controller and an electric vehicle. Background technique [0002] At present, in order to ensure the safety of the motor controller of the power control unit on the electric vehicle, after the system is normally powered off, it is necessary to discharge the residual power of the controller and the motor below the safe voltage. If the power is not released in time, it is likely to It will cause personal electric shock injury. Based on the high-voltage safety requirements of electric vehicles, the national standard GB / T18488.1 has made special requirements for the passive discharge of electric vehicles: when the drive motor controller is cut off from the power supply, it does not cut into the special discharge circuit, and the controller supports the process of natural discharge of the capacitor; When there is a passive discharge re...
Claims
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Login to View More IPC IPC(8): B60L3/00
CPCB60L3/0084B60L3/0061
Inventor 候银桥陈启苗张原强李明远
Owner ZHEJIANG GEELY HLDG GRP CO LTD