Quick charging method for battery management system with safety function

A battery management system and safety function technology, applied in the field of fast charging of battery management systems, can solve the problems of DC charging safety impact, lack of mutual supervision, etc., and achieve the effect of reducing the probability of adhesion

Inactive Publication Date: 2021-02-26
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is less interaction between the battery management system and the vehicle control device, and there is a lack of mutual supervision between the two systems. If either of the two controllers fails and the charging process is not interrupted in time, it will affect the safety of DC charging

Method used

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  • Quick charging method for battery management system with safety function

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Embodiment Construction

[0025] In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 As shown, a battery management system fast charging method with safety functions includes the following content:

[0027] S1: After the BMS (Battery Management System) wakes up, it performs a self-inspection, and performs a self-inspection on the battery system. After the self-inspection passes, it sends a self-inspection success signal to the VCU (Vehicle control unit).

[0028] S2: Detect the connection signal of the fast charging gun, and send the status of the fast charging gun to the VCU.

[0029] S3: Detect the slow charging gun connection signal sent by OBC (On-board Charger), if the slow charging gun is connected, exit the fast charging process and send the charging completion status to the VCU, if not connected, continue the fast charging process;

[0030] S4: BMS sh...

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Abstract

The invention provides a quick charging method for a battery management system with a safety function. According to the method, self-inspection is carried out on a battery system, the state of a quickcharging gun is sent to a vehicle control unit, the battery management system and a charging pile shake hands, carry out identification, and interact, a quick charging relay is closed, and the stateof the quick charging relay is sent to the vehicle control unit. In the charging process, if the battery breaks down, processing is carried out according to the fault level, and if the state of chargeof the battery reaches a set value, the battery management system receives an emergency power-off request sent by the vehicle control unit to disconnect the relay and judges whether the current on aloop is reduced to a specified value or not so as to ensure that the relay cannot be disconnected with load; and meanwhile, after the current drops for more than the specified time, the relay needs tobe disconnected in time no matter whether the current drops or not, so that the quick charging process is safer and more reliable, and the safety and reliability of the quick charging process are ensured.

Description

technical field [0001] The invention belongs to the technical field of charging and replacing electric vehicles, and in particular relates to a fast charging method for a battery management system with a safety function. Background technique [0002] Electric vehicles are connected to charging equipment such as charging piles through charging guns to perform AC and DC charging for energy storage batteries in electric vehicles. An on-board charger is installed in the electric vehicle to charge the energy storage battery according to the AC and DC power provided by the charging equipment. [0003] The existing battery management system is used to monitor the status of the power battery and the current remaining power. The vehicle control device is used to comprehensively determine whether the vehicle meets the AC and DC charging entry and exit conditions, and control the vehicle to enter and exit the AC and DC charging process. There is little interaction between the battery ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/66B60L3/00B60L58/10
CPCB60L53/66B60L3/0046B60L58/10Y02T10/70Y02T10/7072Y02T90/12Y02T90/16
Inventor 李晓依宋庆国窦雅盛李康万应兵
Owner DONGFENG MOTOR CORP HUBEI
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