Intelligent charging method and device for battery management system of electric vehicle

A battery management system and intelligent charging technology, applied in electric vehicle charging technology, battery circuit devices, electric vehicles, etc., can solve the problems of poor charging effect and low charging efficiency, and achieve the elimination of potential safety hazards, avoid overcharge damage, and avoid effect of life

Active Publication Date: 2011-07-06
QIMING INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention discloses an intelligent charging method for a battery management system of an electric vehicle, wh

Method used

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  • Intelligent charging method and device for battery management system of electric vehicle
  • Intelligent charging method and device for battery management system of electric vehicle
  • Intelligent charging method and device for battery management system of electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example 1

[0048] Such as figure 1 Shown: The intelligent charging device is mainly composed of microcontroller (MCU-Micro Control Unit), controller area network (CAN-Controller Area Network) transceiver, charging switch detection circuit, and battery management system (BMS-Battery Management System) drive circuit , Car charger drive circuit, charging relay drive circuit and LCD display. Among them, the general purpose input / output (GPIO-General Purpose Input Output) interface 1 of the MCU cooperates with the charging switch detection circuit to collect the charging switch signal and determine whether to enter the smart charging mode. After entering the smart charging mode, GPIO2 of the MCU enables BMS via the battery management system drive circuit, and GPIO3 enables the on-board charger via the on-board charger drive circuit. At the same time, the CAN communication module 1 of the MCU is connected to the CAN bus interface of the vehicle controller (VCU-Vehicle Contro...

Example Embodiment

[0049] Example 2

[0050] Such as figure 2 Shown: the signal receiving pin CAN_RXD1 and signal sending pin CAN_TXD1 of the CAN communication module 1 of the MCU are connected with the signal receiving pin RXD and signal sending pin TXD of the CAN transceiver 1 to complete the TTL level transmission of the CAN bus; The CANH end and CANL end of the CAN transceiver 1 are connected to the CAN bus interface CANH end and CANL end of the VCU to complete the differential level transmission of the CAN bus, thus realizing the conversion between TTL level and differential level.

[0051] The signal receiving pin CAN_RXD2 and signal sending pin CAN_TXD2 of the CAN communication module 2 of the MCU are connected to the signal receiving pin RXD and signal sending pin TXD of the CAN transceiver 2 to complete the TTL level transmission of the CAN bus; CAN transceiver The CANH end and CANL end of 2 are connected with the CAN bus interface CANH end and CANL end of the BMS to complete the differen...

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Abstract

The invention discloses an intelligent charging method and device for a battery management system of an electric vehicle. A microcontroller is connected with communication interfaces of a whole vehicle controller, the battery management system and a vehicle-mounted charger, messages relevant to charging information are read, charging parameters are regulated, a communication module informs the charging information to the battery management system and the vehicle-mounted charger, and after information feedback from the battery management system and the vehicle-mounted charger is received, a charging command is sent to the vehicle-mounted charger through the communication module; after receiving the charging command, the vehicle-mounted charger charges a power battery after converting the input alternate current into high-voltage direct current; and the microcontroller displays the charging information to a driver in real time through a man-machine interaction unit and regulates the charging strategy. The charging current and charging voltage of the vehicle-mounted charger can be regulated automatically according to the charging information sent by the whole vehicle controller, the current residual volume of the battery management system and other information, and the driver is prompted through a man-machine interaction interface, thereby avoiding the damage to the battery in a blindly charging state due to overcharging, eliminating potential safety hazards caused by overcharging batteries, ensuring life safety and avoiding economic loss.

Description

technical field [0001] The invention discloses an intelligent charging method for a battery management system of an electric vehicle, and also provides a device for realizing the method, belonging to the technical field of electric power management of new energy vehicles. Background technique [0002] At present, the battery management system of the existing electric vehicle mainly has the following functions: control the on-off of the main circuit relay of the power battery, which is used to start or close the power output of the motor; estimate the current state of charge of the battery, and provide energy information for the driver to ensure continuous driving Mileage and driving safety; manage the charging circuit of the power battery to supplement energy for electric vehicles. When the traditional battery management system manages the charging circuit of the power battery, it often only makes a connection circuit between the on-board charger and the high-voltage battery...

Claims

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Application Information

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IPC IPC(8): H01M10/44H01M10/42H02J7/00B60L11/18B60R16/02
CPCY02E60/12Y02T10/7005Y02T10/7022Y02T90/16Y02E60/10Y02T10/70
Inventor 吴畏姜鹏朱庆林董冰丁勇
Owner QIMING INFORMATION TECH
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