New energy automobile drive motor high voltage terminal protection method and system
A new energy vehicle, high-voltage terminal technology, applied in electric vehicles, electrical devices, vehicle components, etc., can solve the problems of loose connection, burning, high temperature and so on
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Embodiment 1
[0048] figure 1 It is a flowchart of a high-voltage terminal protection method for a drive motor of a new energy vehicle provided by the present invention. The high-voltage terminal protection methods of new energy vehicle drive motors include:
[0049] S10: Obtain the temperature signal at the high voltage terminal.
[0050] The high-voltage terminal connecting the motor and the motor controller is set in the motor junction box, and the normal connection of the high-voltage terminal can ensure the normal transmission of current and the normal operation of the motor. Due to the long-term operation of the vehicle, vibration and other reasons, the high-voltage terminal will become loose. When the high-voltage terminal is loose, the contact area of the terminal will be reduced, resulting in partial discharge at the high-voltage terminal, causing local instantaneous high temperature, and even burning the high-voltage terminal. Therefore, in order to detect whether there is a f...
Embodiment approach
[0075] As a preferred implementation manner, the sending the fault signal specifically includes:
[0076] Send a fault signal to the vehicle controller through the CAN bus.
[0077] Since this preferred implementation mode is a specific implementation process of step S15 in the first embodiment, please refer to the first embodiment for descriptions of other steps, and only the step of sending a fault signal is specifically described here. When the high-voltage terminal is judged to be faulty according to the target temperature signal, a fault signal is sent to the vehicle controller through the CAN bus.
Embodiment 2
[0079] The high-voltage terminal protection system for drive motors of new energy vehicles includes:
[0080] The temperature sensor is set in the motor junction box and is used to obtain the temperature signal at the high voltage terminal;
[0081] A low-voltage connector, connected to the output end of the temperature sensor, for transmitting the temperature signal to the temperature detection circuit of the motor controller;
[0082] The temperature detection circuit is connected to the low-voltage connector and is used to receive the temperature signal and convert the temperature signal into a target temperature signal that can be read by a digital signal processor;
[0083] The digital signal processor, connected to the temperature detection circuit, is used to read the target temperature signal, and judge whether the high voltage terminal is faulty according to the target temperature signal;
[0084] Wherein, when the judgment result is that the high-voltage terminal fa...
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