Method and device for controlling fault tolerance of battery management system of electric automobile

A battery management system, fault-tolerant control technology, applied in the direction of electric vehicle charging technology, electric vehicles, circuits or fluid pipelines, etc., can solve problems such as power battery failure, powerlessness, etc., to reduce accidents, ensure life and property safety, improve The effect of driving safety

Active Publication Date: 2011-07-13
QIMING INFORMATION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a fault-tolerant control method for a battery management system of an electric vehicle, which solves the problem that the traditional battery management system is often helpless when the power battery failure of the electric vehicle is prone to occur

Method used

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  • Method and device for controlling fault tolerance of battery management system of electric automobile
  • Method and device for controlling fault tolerance of battery management system of electric automobile
  • Method and device for controlling fault tolerance of battery management system of electric automobile

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Embodiment 1

[0029] The fault-tolerant control device is mainly composed of MCU, CAN transceiver, FLASH data storage unit, LCD display and SD card drive circuit. Among them, the CAN communication module of the MCU is connected to the CAN bus interface of the BMS after the level conversion of the CAN transceiver, reads the fault code of the BMS, parses out the fault information of the current BMS, writes it into the FLASH data storage unit for backup, and saves the information Displayed on the LCD display for the driver to view. At the same time, the fault-tolerant control device will select a corresponding fault-tolerant control strategy based on the fault information, and the CAN communication module will send fault-tolerant control commands to the BMS. BMS executes fault-tolerant processing actions according to this command.

[0030] The other CAN communication module of the fault-tolerant control device MCU is connected to the vehicle diagnostic interface after level conversion by the ...

Embodiment 2

[0032] Such as figure 2 As shown: the signal receiving pin CAN1_RXD and the signal transmitting pin CAN1_TXD of the CAN communication module 1 of the MCU are connected with the signal receiving pin RXD and the signal transmitting pin TXD of the CAN transceiver 1 to complete the TTL level transmission of the CAN bus; The CANH1 terminal and the CANL1 terminal of the CAN transceiver 1 are connected to the CAN bus interface CANH terminal and the CANL terminal of the BMS to complete the differential level transmission of the CAN bus, thus realizing the conversion between the TTL level and the differential level.

[0033] The reading and writing of the FLASH data storage unit adopts the way of the extended bus, and its write protection line WP#, reset line RST#, read enable line OE#, write enable line WE#, and chip select line CE# are respectively connected with the MCU’s The expansion bus pin connection completes the data storage function of FLASH. Among them, the FLASH data inpu...

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Abstract

The invention discloses a method and a device for controlling the fault tolerance of a battery management system of an electric automobile. A communication module, subjected to level conversion, of a micro controller is connected with a controller area network (CAN) bus interface of the battery management system of the electric automobile to read a fault code of the battery management system, revolve corresponding fault information, write the fault information into a data storage unit for backing up, and display the information to a driver through a man-machine interaction unit. The micro processor can select a corresponding fault tolerance control strategy according to the fault information; and a fault tolerance control command is sent to the battery management system by the communication module. The battery management system executes fault tolerance processing operation according to the command. By the method and the device, accidents caused by small problems of the electric automobile which are not processed immediately can be reduced; and a liquid crystal display (LCD) screen for displaying the fault information is provided, so that the device can immediately inform the driver of learning about the automobile condition in reminding ways such as light, sound and the like effectively so as to avoid accidents, thereby greatly enhancing the running safety and guaranteeing the life and property safety of people.

Description

technical field [0001] The invention discloses a fault-tolerant control method of a battery management system of an electric vehicle, and also provides a device for realizing the method, belonging to the field of new energy vehicles. Background technique [0002] At present, the battery management system of the existing electric vehicle mainly has the following functions: manage the power output of the power battery of the electric vehicle, calculate the remaining power of the current battery, and control the charging and discharging of the power battery. The main purpose is to curb the current over-discharge of the power battery, Provide energy information for the driver to ensure driving range and driving safety, and dynamically correct charging parameters during charging to ensure battery life, etc. However, when the power battery or the battery management system itself fails, the battery management system cannot perform fault-tolerant processing, and cannot display the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42B60L11/18B60R16/02
CPCY02E60/12Y02T10/7005Y02T90/16Y02E60/10
Inventor 赵孝国王东晨拱印生朱庆林董冰丁勇
Owner QIMING INFORMATION TECH
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