Electric vehicle high voltage protection system and method
An electric vehicle, high-voltage protection technology, applied in the direction of electric vehicles, electrical devices, vehicle components, etc., can solve the problems of electric shock to the driver or passengers, combustion of the high-voltage system of the vehicle, damage to the high-voltage system of the vehicle, etc., and achieve the goal of perfecting the high-voltage protection function Effect
Inactive Publication Date: 2016-06-15
重庆睿蓝汽车制造有限公司
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Problems solved by technology
During driving, a sudden short circuit of any high-voltage power system in an electric vehicle may cause dangers such as electric shock to the driver or passengers, and cause damage to the high-voltage system of the vehicle, and even cause the high-voltage system of the vehicle to burn
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Embodiment Construction
[0040] As mentioned in the background technology section, it has become a problem to be solved urgently to formulate corresponding protection strategies according to specific faults that may occur in electric vehicles to maximize the high-voltage protection function of electric vehicles.
[0041] In view of this, the embodiment of the present invention provides a high-voltage protection system for electric vehicles, including: a battery pack structure, an airbag, a compressor, a heating resistor and a motor controller, and an electronic control unit for the entire vehicle. The first switch, the second switch and the third switch connected to the vehicle electronic control unit;
[0042] Wherein, the input end of the first switch is connected to the battery pack structure, the output end is connected to the motor controller, the input end of the second switch, and the input end of the third switch; the output end of the second switch is connected to the compressor ; The output ...
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The embodiment of the present invention discloses a high-voltage protection system and method for an electric vehicle. The system includes: a battery pack structure, an airbag, a compressor, a heating resistor, a motor controller, a vehicle ECU, and a first switch connected to the vehicle ECU. , the second switch and the third switch, so that the first switch can be turned off when the vehicle ECU detects that the airbag is opened, or when the operating voltage of the electric vehicle is lower than the preset total voltage signal, or when the motor current is greater than the motor protection current ; When the first switch is closed, when the vehicle ECU detects that the compressor current is greater than the compressor protection current, the second switch is disconnected; when the first switch is closed, when the vehicle ECU detects that the heating resistor current When it is greater than the protection current of the heating resistor, the third switch is turned off, so that the electric vehicle high-voltage protection system and method can adopt corresponding protection strategies according to the specific faults that may occur in the electric vehicle, so as to improve the high-voltage protection function of the electric vehicle.
Description
technical field [0001] The invention relates to the technical field of high voltage protection for electric vehicles, in particular to a high voltage protection system and method for electric vehicles. Background technique [0002] As the fourth largest system in addition to the vehicle control system, battery and battery management system, and motor drive system, the high-voltage protection system of electric vehicles has attracted more and more attention from the automotive industry due to the high-voltage safety protection related to people. [0003] At present, the drive motors and motor controllers, air-conditioning compressors, heating resistors, etc. that most electric vehicles are equipped with are powered by high-voltage power battery packs. During driving, a sudden short circuit of any high-voltage power system in an electric vehicle may cause dangers such as electric shock to the driver or passengers, damage the high-voltage system of the vehicle, and even cause t...
Claims
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IPC IPC(8): B60L3/00
Inventor 隋毅
Owner 重庆睿蓝汽车制造有限公司