Current protection-based method, control system and electric vehicle

A control system and current protection technology, applied in the field of electric vehicles, can solve problems such as difficult current global protection

Active Publication Date: 2021-07-06
GUANGZHOU CHENGXING ZHIDONG AUTOMOTIVE TECH CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003]But at present, during the normal operation of electric vehicles, due to the wide current range of the whole vehicle, it is difficult to achieve full current protection only by using insurance

Method used

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  • Current protection-based method, control system and electric vehicle
  • Current protection-based method, control system and electric vehicle
  • Current protection-based method, control system and electric vehicle

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Embodiment Construction

[0071] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, only a part of the embodiments of the present invention, not all the embodiments, and are not intended to limit the present invention.

[0072] The inventors found that during the normal operation of the current electric vehicle, due to the wide current range of the whole vehicle, it is difficult to realize the global current protection only by using the insurance of the main circuit of the power battery. The inventor further researched and found that the main cause of this problem is the difference in vehicle current under different abnormal conditions, specifically:

[0073] refer to figure 1 , which exemplarily sh...

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Abstract

The invention provides a current protection-based method, a control system and an electric vehicle, and relates to the technical field of electric vehicles, the method comprises the following steps: a battery management system controls the state of a main contactor according to the magnitude relationship between the current current and two preset currents, and controls the state of the main contactor; and the vehicle control unit calculates the current actual power of the power battery management system according to the received actual operation parameters, and then controls the state of the main contactor based on the current actual power of the power battery management system and the duration of keeping the current actual power. In addition, the fuse can trigger active fusing when the current is too large, and the function of protecting the main loop of the power battery is achieved. According to the invention, the current of the whole vehicle can be accurately protected, overheat burnout of parts, circuits and the like of the electric vehicle can be avoided, electric shock of personnel and crisis of personal safety can be avoided, and the method has high practicability.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method and device based on current protection and electric vehicles. Background technique [0002] In the current electric vehicles on the market, the main circuit of the power battery is connected in series with insurance. The function of insurance is to ensure that the main circuit of the power battery can be disconnected in time under abnormal circumstances, so as to achieve the goal of safely protecting personnel and vehicles. [0003] However, during the normal operation of electric vehicles at present, due to the wide current range of the whole vehicle, it is difficult to achieve full current protection only by using insurance. Contents of the invention [0004] In view of the above problems, the present invention is proposed to provide a method, device and electric vehicle based on current protection that overcome the above problems or at least partially sol...

Claims

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Application Information

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IPC IPC(8): B60L58/10B60R16/023
CPCB60L58/10B60R16/0231Y02T10/70
Inventor张明王燕乐王杭挺赖日飞钟华龙
OwnerGUANGZHOU CHENGXING ZHIDONG AUTOMOTIVE TECH CO LTD