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Method and device for controlling low-power battery of electric automobile

A battery control method and technology for electric vehicles, which are applied to electric vehicles, battery circuit devices, circuit devices, etc., can solve the problems of large capacity, large weight and volume of low-power batteries, increase the weight of the entire electric vehicle, and reduce the weight. Effect

Active Publication Date: 2016-02-03
FJ MOTOR GRP YUDO NEW ENERGY AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weight of the electric vehicle indirectly affects the battery life of the vehicle. Therefore, in order to ensure the load capacity and power supply time of the low-power battery, the capacity of the low-power battery of the existing electric vehicle is relatively large, resulting in its weight and volume. It is relatively large, which increases the weight of the electric vehicle, which is contrary to the development direction of lightweight electric vehicles

Method used

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  • Method and device for controlling low-power battery of electric automobile
  • Method and device for controlling low-power battery of electric automobile
  • Method and device for controlling low-power battery of electric automobile

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Embodiment Construction

[0037] In order to describe in detail the technical content, structural features, achieved objectives and effects of the present invention, the following is a detailed description in conjunction with the embodiments and accompanying drawings.

[0038] Glossary:

[0039] BCM: BodyControlModule, the body controller;

[0040] DCDC: DirectCurrentTODirectCurrent, that is, DC-DC voltage conversion module;

[0041] BMS: BatteryManagerSystem, the battery management system;

[0042] SOC: StateOfCharge, hard and dangerous state of charge.

[0043] See figure 2 , The optimization scheme of the low-power battery control of the electric vehicle of the present invention, in the optimization scheme, the body controller BCM (hereinafter or referred to as BCM), DCDC module (hereinafter or referred to as DCDC) and battery management system BMS (hereinafter or referred to as BMS) pass CAN bus communicates with each other. Preferably, the CAN bus is a low-speed CAN bus with a rate lower than 250Kb / s. El...

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Abstract

The invention discloses a method and a device for controlling a low-power battery of an electric automobile. The method for controlling the low-power battery of the electric automobile comprises the steps of acquiring voltage of the low-power battery of the automobile through a voltage acquisition circuit of an automobile body controller when the automobile body controller is awoken in a timing manner; judging whether the acquired voltage is lower than set electricity-shortage voltage or not, if yes, sending a charging request to a DCDC module through a CAN bus, and carrying out charging on the low-power battery by the DCDC module; and if not, not carrying out a charging operation. The method and the device disclosed by the invention greatly reduce the capacity and the mass of the low-power battery of the electric automobile, thereby achieving a purpose of lightweight of the finished electric automobile.

Description

Technical field [0001] The present invention relates to the field of electric vehicles, in particular to a method and device for controlling low-power batteries of electric vehicles. Background technique [0002] New energy vehicles refer to the use of unconventional vehicle fuels as the power source (or the use of conventional vehicle fuels, the use of new on-board power devices), the integration of advanced technologies in vehicle power control and driving, and the formation of advanced technical principles and Cars with new technology and new structure. Electric vehicles have been accepted by most people because of their economic efficiency and zero emissions. Electric vehicles usually contain two sets of batteries, one is a high-voltage battery, used to power the drive motor, and the other is a low-power battery, used to power the car's electrical appliances (such as instrument cluster, audio system, low-voltage control system) Wait). [0003] At present, most of the selecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 吴凌鸿曹敬轩刘心文童年
Owner FJ MOTOR GRP YUDO NEW ENERGY AUTOMOBILE CO LTD
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