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Safety system of electric car battery unit structure, and control method thereof

A technology of safety system and battery unit, which is applied in the direction of battery pack parts, structural parts, electrical components, etc., to achieve the effect of reducing voltage level, ensuring consistency and improving safety

Pending Publication Date: 2017-05-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] During the parking process, although the battery system does not work, the vehicle accessory equipment is powered by a low-voltage power supply, but there are also potential safety risks

Method used

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  • Safety system of electric car battery unit structure, and control method thereof
  • Safety system of electric car battery unit structure, and control method thereof
  • Safety system of electric car battery unit structure, and control method thereof

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Embodiment Construction

[0036] In order to enable the examiner to further understand the structure, features and other purposes of the present invention, the attached preferred embodiments are attached with accompanying drawings in detail as follows. The embodiments illustrated in the accompanying drawings are only used to illustrate the technical solution of the present invention , not to limit the present invention.

[0037] First, please refer to figure 1 , figure 1 It is a block diagram of the basic composition of the electric steam control system of the present invention. Such as figure 1 As shown, the safety system of the present invention includes a battery system 1 , a driving circuit 2 , a relay 3 , a sensor 4 , a controller 5 and a vehicle state estimator 6 . The battery system 1 includes a battery box layer 11 composed of several battery packs B1 connected in series, a battery pack layer 12 composed of several battery modules C1, and a battery module layer 13 composed of several battery...

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Abstract

The invention provides a safety system of an electric car battery unit structure, and a control method thereof. The safety system comprises a battery system, a driving circuit, a relay, a sensor, a controller and a car state estimator. The battery system comprises a battery box layer, a battery bag layer and a battery module layer. Turn-on or cut-off of battery units in the charge / discharge process guarantees the consistence of the battery units; transformation of the connecting mode of the battery system in the parking process reduces the voltage of the battery system and prevents latent high voltage dangers; and connection of battery cells is broken when battery liquid leakage, insulation damage or local short circuit appears in the running process in order to prevent the high voltage dangers, and some battery units are selectively cut off in the bumping process according to the bumping degree in order to prevent the high voltage dangers.

Description

technical field [0001] The invention belongs to the field of drive control systems for electric vehicles, and in particular relates to a safety system and a control method for improving the safety and practicability of battery packs by means of on-off between battery pack units of electric cars. Background technique [0002] With the popularization and application of new energy technologies, the number of pure electric vehicles in road public transportation systems has increased rapidly. During the demonstration operation process, the problems exposed are also worthy of attention. [0003] First of all, the problem of inconsistency. At present, the power battery of electric vehicles is generally composed of multiple cells called large-capacity single cells connected in series. Due to uneven materials in the process of manufacturing and differences in battery temperature and life during use, there must be inconsistencies in parameters such as internal resistance, terminal vo...

Claims

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Application Information

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IPC IPC(8): H01M10/42H01M10/44H01M2/20H01M2/34
CPCY02E60/10
Inventor 王震坡王亚超刘鹏
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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