Overcurrent protection device and electric vehicle
An overcurrent protection and current technology, applied in electric vehicles, emergency protection circuit devices, electrical devices, etc., can solve problems such as dangerous traffic accidents on slopes, rear-end collisions, and vehicle loss of power
Inactive Publication Date: 2020-02-07
上海元城汽车技术有限公司
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Problems solved by technology
However, when the vehicle is driving on a high-speed road section or a climbing section, the vehicle suddenly loses power, which may easily cause rear-end collisions and dangerous traffic accidents
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[0040] 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, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.
[0041] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
[0042] It should be noted that relative ter...
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The embodiment of the invention provides an overcurrent protection device and an electric vehicle, and relates to the technical field of electric control. The overcurrent protection device comprises amain control chip, a current acquisition module and a fault diagnosis module, the current acquisition module is electrically connected to the main control chip, the fault diagnosis module and the motor, and the main control chip is electrically connected with the motor and the fault diagnosis module; the current acquisition module acquires current information of the motor and converts the currentinformation into voltage information; the fault diagnosis module determines whether the motor has an overcurrent fault or not according to the voltage information, and sends an overcurrent fault signal to the main control chip if the motor has the overcurrent fault; and after the main control chip receives the overcurrent fault signal, the current change rate of the motor is calculated accordingto the voltage information, and if the current change rate is within a preset interval, a control signal sent to the motor is adjusted, so that the output current of the motor is reduced. The overcurrent protection device can ensure that an electric automobile has a certain traction force when over-current abnormity occurs to the motor, and traffic accidents are avoided.
Description
technical field [0001] The invention relates to the technical field of electric control, in particular to an overcurrent protection device and an electric vehicle. Background technique [0002] The drive system is the heart of electric vehicles and the fundamental guarantee for improving the driving performance and reliability of electric vehicles. The motor is a key component of the drive system. Under complex working conditions, the motor will work abnormally and generate abnormally large currents, which will seriously damage the power devices inside the controller. [0003] In the prior art, when the output current of the controller changes suddenly suddenly, the hardware overcurrent protection device is triggered to directly control the motor to stop working, so that the vehicle loses power. However, when the vehicle is driving on a high-speed road section or a climbing section, the vehicle suddenly loses power, which is likely to cause rear-end collisions and dangerous...
Claims
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IPC IPC(8): H02P29/024H02P29/028H02H7/08H02H7/085B60L3/00
CPCB60L3/0061B60L2240/429H02H7/08H02H7/0854H02H7/0858H02P29/027H02P29/028Y02T10/64
Inventor 吴晓章牛胜福姜辛周毅张慧君
Owner 上海元城汽车技术有限公司