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Vehicle power battery active maintenance method and system

A power battery and maintenance system technology, which is applied in secondary battery repair/maintenance, secondary battery, secondary battery charging/discharging, etc., can solve problems such as inability to effectively improve power battery life, and inability to effectively achieve power battery balance. Achieve the effect of realizing active balancing and maintenance, simplifying operation and improving service life

Active Publication Date: 2019-04-02
ZHENGZHOU YUTONG BUS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an active maintenance method for vehicle-mounted power batteries, which is used to solve the problem that the traditional equalization method cannot effectively achieve the balance of the power battery, and thus cannot effectively improve the life of the power battery

Method used

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  • Vehicle power battery active maintenance method and system
  • Vehicle power battery active maintenance method and system
  • Vehicle power battery active maintenance method and system

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Experimental program
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Embodiment approach

[0040] This step process is a hierarchical charging process. Since the SOC of the power battery gradually rises during the charging process, N set power thresholds are set according to actual needs. When the SOC of the power battery reaches a certain set power threshold, the The charging power corresponding to the set power threshold controls the supercapacitor to charge the power battery, wherein N≥1, and the number of N is set according to actual needs. Regardless of the number of N, the entire charging process is based on the following charging principle: the larger the SOC of the power battery, the smaller the corresponding charging power. A specific implementation is given below: in the process of gradually increasing the SOC of the power battery, when the SOC of the power battery reaches the first set power threshold, the supercapacitor is controlled to charge the power battery with the second set charging power, The first set charging power is greater than the second se...

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Abstract

The invention relates to a vehicle power battery active maintenance method and system. When a balance condition of a power battery is met, a charge power control super capacitor is employed to chargea power battery, in the process of the gradual rising of the SOC of the power battery, the power battery is charged with a corresponding charge power according to the range meeting the SOC of the power battery, and when the SOC reaches a set start balance electric quantity threshold value, the power battery is subjected to active balance control to maintain the power battery until the SOC of the power battery reaches a set end balance electric threshold value. Only when the electric quantity of the power battery reaches a certain value, the effective active balance can be ensured, so that thepower battery is charged to effectively achieve the balance of the power battery through balance control so as to effectively improve the service life of the power battery. Besides, the method can automatically maintain the power battery, and users do not need to search external charging devices so as to simplify operation.

Description

technical field [0001] The invention relates to an active maintenance method and system for a vehicle-mounted power battery, and belongs to the technical field of active equalization of power batteries. Background technique [0002] Part of the power source of the hybrid vehicle comes from the high-voltage power battery. Due to its inherent properties, the power battery needs to be regularly charged and discharged for maintenance. That is, the BMS (battery management system) regulates the power battery to perform a balanced charging process. During the use of the power battery, the terminal voltage of the power battery is unbalanced due to individual differences in the power battery, temperature differences and other reasons. In order to avoid the deterioration of this unbalanced trend, it is necessary to increase the charging voltage of the power battery and activate the power battery. . However, due to the different vehicle conditions and charging conditions of each hybri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44
CPCH01M10/441Y02E60/10
Inventor 靳超张广利游祥龙纪秉男李师
Owner ZHENGZHOU YUTONG BUS CO LTD
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