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Control system and method for novel battery equalizer

A battery equalization and control system technology, which is applied in current collectors, battery circuit devices, secondary battery repair/maintenance, etc., can solve problems such as inability to protect and prolong battery life, so as to prevent performance degradation and prolong life , to improve the effect of consistency

Inactive Publication Date: 2011-05-18
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: the prior art is passive equalization, that is, the battery equalization control is performed after the battery fails, which cannot protect the battery and prolong the service life of the battery

Method used

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  • Control system and method for novel battery equalizer
  • Control system and method for novel battery equalizer
  • Control system and method for novel battery equalizer

Examples

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Embodiment 1

[0035] refer to figure 1 , the embodiment of the present invention provides a novel battery balancer control system, the battery balancer control system combines BMS and BBS, mainly including:

[0036] The BMS battery information acquisition unit is used to obtain battery information, such as battery voltage, battery SOC (State of Charge, state of charge), etc., to understand the battery usage status;

[0037] The BMS equalization judging unit is used to judge whether the battery needs to be equalized according to the battery information obtained by the BMS battery information acquisition unit, determine the number of the single battery that needs to be equalized, and judge that the single battery should be discharged and balanced. Or charge equalization;

[0038] During driving, when the battery SOC or the voltage value of the single battery is lower than the set value, according to the collected voltage of each single battery, find out the single battery with low energy, an...

Embodiment 2

[0049] refer to figure 2, the embodiment of the present invention provides a novel battery balancer control system, the battery balancer control system combines BMS and BBS, mainly including:

[0050] The BMS battery information acquisition unit is used to obtain battery information, such as battery voltage, battery SOC, etc., to understand the battery usage status;

[0051] The BMS equalization judging unit is used to judge whether the battery needs to be equalized according to the battery information obtained by the BMS battery information acquisition unit, determine the number of the single battery that needs to be equalized, and judge that the single battery should be discharged and balanced. Or charge equalization;

[0052] During driving, when the battery SOC or the voltage value of the single battery is lower than the set value, according to the collected voltage of each single battery, find out the single battery with low energy, and each single battery corresponds t...

Embodiment 3

[0066] This embodiment provides a control method for the novel battery BBS control system provided in Embodiment 1, which mainly includes:

[0067] BMS obtains battery information, such as battery voltage, battery SOC, etc., to understand the battery usage status;

[0068] According to the obtained battery status information, it is judged whether the battery needs to be balanced, the number of the single battery that needs to be balanced is determined, and the single battery is judged to be discharged or charged;

[0069] During driving, when the battery SOC or the voltage value of the single battery is lower than the set value, according to the collected voltage of each single battery, find out the single battery with low energy, and each single battery corresponds to a serial number. The battery number to be equalized shall be sent to the BBS through the CAN communication to send the order of the battery number to be balanced and the charging equalization to be carried out; ...

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Abstract

The invention discloses a control system and method for a novel battery equalizer, belonging to the technical field of battery equalization control. The method comprises the following steps of: acquiring battery information by using a battery management system, judging whether the battery is required to be subjected to equalization treatment or not, determining the number of the single battery required to be subjected to equalization treatment and judging whether the single battery needs to be subjected to discharging equalization or charging equalization; and acquiring information of the single battery which is required to be subjected to equalization treatment by using the equalizer, processing the information of the single battery, acquiring charging and discharging parameters, acquiring charging and discharging commands, judging a module on which the single battery is arranged, transmitting a control command to the equalizer and simultaneously feeding back equalizing information to an equalized judging unit of the battery management system. According to the invention, by combining a power battery BBS (Battery Balance System) with a BMS (Battery Management System), the equalized requirement for the single battery can be actively judged, the mileage range of the automobile is improved and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to battery equalization control technology, in particular to an active equalization system for power batteries of pure electric vehicles, hybrid vehicles, plug-in hybrid vehicles and the like. Background technique [0002] With the shortage of energy and the requirements of environmental protection, the research and development and marketization of new energy vehicles are imperative. At present, new energy vehicles mainly use batteries as power sources, so the safety and stability of power batteries has become an important factor affecting the development and marketization of new energy vehicles. Power batteries for automobiles are usually connected in series. Because the manufacturing, initial capacity, voltage, internal resistance, and temperature of each single battery in the battery pack are not exactly the same for each single battery, the performance of the single battery is poor. After the power battery is used for a perio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02H7/00H01M10/42
CPCY02E60/12Y02E60/10
Inventor 许莉
Owner CHERY AUTOMOBILE CO LTD
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