Method and system for monitoring battery pack of electric automobile

A technology for electric vehicles and monitoring systems, applied in the direction of secondary batteries, secondary battery repair/maintenance, circuits, etc. The effect of improving reliability and safety

Active Publication Date: 2015-11-11
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the type commonly used in electric vehicles is lithium batteries. Compared with other types of batteries, lithium batteries have relatively high energy density and can provide relatively high discharge power. However, the service life and performance of lithium batteries are extremely sensitive to ambient temperature. Sensitive, over-cold or over-heated external environments will reduce the service life of lithium batteries, especially for electric vehicles that have been left standing for a long time. If they are placed in a cold or hot environment for a long time, the performance of the battery pack will decrease or be damaged, posing a safety hazard. , it may cause injury to the vehicle or personnel when it is used again

Method used

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  • Method and system for monitoring battery pack of electric automobile
  • Method and system for monitoring battery pack of electric automobile
  • Method and system for monitoring battery pack of electric automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In this embodiment, the battery management system determines whether to start the thermal management operation of the battery pack according to the temperature and the SOC value of the battery pack.

[0046] Specifically, firstly, in step S03, the battery management system acquires the temperature and SOC (State of Charge, remaining power) value of the battery pack.

[0047] In step S04, the battery management system judges whether the temperature of the battery pack is abnormal by obtaining the temperature value of the battery pack and comparing it with the normal temperature threshold of the battery pack. Abnormal state.

[0048] When it is judged that the temperature of the battery pack is in an abnormal state, and the SOC value of the battery pack is within the threshold range of normal operation, it is considered to start the thermal management operation of the battery pack. In step S05, the thermal management operation of the battery pack is started, that is, the ...

Embodiment 2

[0053] In this embodiment, the remote server judges whether to start the thermal management operation of the battery pack according to the temperature and SOC value of the battery pack. In this embodiment, only the parts different from the first embodiment are described, and the other same parts will not be repeated.

[0054] After the battery management system obtains the temperature and SOC value of the battery pack, it sends the temperature and SOC value of the battery pack to the remote server, and the remote server judges whether it is necessary to start the thermal management operation of the battery pack according to the received temperature and SOC value. Whether the temperature of the battery pack is within the normal temperature threshold range, if not, the battery pack temperature is in an abnormal state, if the SOC value of the battery pack is within the normal working threshold range, it is considered to start the battery pack thermal management operation, start the...

Embodiment 3

[0059] In this embodiment, the user terminal judges whether to start the thermal management operation of the battery pack according to the temperature and SOC value of the battery pack. In this embodiment, only the parts different from the first embodiment are described, and other identical parts will not be repeated.

[0060] After the battery management system obtains the temperature and the SOC value of the battery pack, the temperature and the SOC value of the battery pack are sent to the user terminal through the remote server. The user terminal judges whether it is necessary to start the battery pack thermal management operation according to the received temperature and SOC value, that is, judges whether the temperature of the battery pack is within the normal temperature threshold range. If not, the battery pack temperature is in an abnormal state. If the battery pack SOC If the value is within the threshold range of normal operation, it is considered to start the therma...

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Abstract

The invention discloses a method for monitoring a battery pack of an electric automobile. The method comprises the following steps: acquiring the temperature and a state-of-charge (SOC) value of the battery pack by a battery management system; judging whether a heat management operation of the battery pack is started or not according to the temperature and the SOC value of the battery pack; and if so, starting the heat management operation of the battery pack, and transmitting the current SOC value of the battery pack to a user terminal through a remote server. According to the method and the system disclosed by the invention, the heat management of the battery pack is realized; the SOC value of the battery pack can be timely acquired by the user terminal; a user can timely acquire the information of the battery pack; and the reliability and the safety of the battery pack are improved.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a method and system for monitoring battery packs of electric vehicles. Background technique [0002] With the continuous reduction of traditional energy sources, energy-saving and environmentally friendly electric vehicles have attracted more and more attention. For electric vehicles, the battery pack is charged through the charger, and the battery pack outputs the driving current, thereby realizing the conversion of electrical energy and mechanical energy. [0003] At present, in the monitoring of the battery pack, the battery management system is mainly used to monitor the charging and discharging process of the battery pack, and the main monitoring object is the voltage signal of the battery cell. At present, the type commonly used in electric vehicles is lithium batteries. Compared with other types of batteries, lithium batteries have relatively high energy density and can p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/633H01M10/635H01M10/625
CPCH01M10/42Y02E60/10
Inventor 丁更新
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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