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Method and system for adjusting real-time battery capacity during automobile charging and electric automobile

A technology for battery capacity and vehicle charging, applied in electric vehicles, battery circuit devices, secondary battery charging/discharging, etc., can solve problems such as SOC estimation obstacles, inability to accurately estimate SOC errors, etc., to achieve safety assurance and stable voltage changes , easy-to-control effects

Inactive Publication Date: 2013-01-02
HANGZHOU JIENENG POWER
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  • Abstract
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AI Technical Summary

Problems solved by technology

These estimation methods all have their own advantages. However, when a certain algorithm is used alone for SOC estimation, it is impossible to accurately estimate the error of SOC, especially the various problems caused by battery aging, which pose obstacles to SOC estimation.

Method used

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  • Method and system for adjusting real-time battery capacity during automobile charging and electric automobile

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Embodiment Construction

[0018] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] A method for adjusting real-time battery capacity when a car is charging, comprising:

[0020] According to the charging current I of the single battery, the open-circuit voltage at which the integrated value △Q of the ampere-hour of charging power is at the peak point is obtained;

[0021] Comparing the open-circuit voltage at the peak point with the open-circuit voltage at the peak point of the standard curve, when the variation of the open-circuit voltage satisfies the set condition, adjust the battery capacity SOC, otherwise, keep the currently recorded battery capacity.

[0022] Obtain the open-circuit voltage corresponding to the peak point of the ΔQ peak point of the charging power ampere-hour integral value, specifically: calculate the open-circuit voltage value corresponding to the extreme point of the curve ΔQ / ΔV. ...

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Abstract

The invention relates to a method for adjusting real-time battery capacity during automobile charging. The method comprises the steps of: acquiring an open-circuit voltage with integral value Delta Q of a charging electric quantity ampere-hour at the peak according to a charging current I of a single battery; comparing the open-circuit voltage at a peak point and an open-circuit voltage at a standard curve peak; when a open-circuit voltage variation meets preset conditions, adjusting the battery capacity SOC; and if not, keeping the currently recorded battery capacity. The invention has advantages of high accuracy, simpleness, high data reliability, timely understand of the overall performance of the battery, better adaptability and intellectualization.

Description

technical field [0001] The invention relates to a method and a system for adjusting real-time battery capacity when a car is being charged, and an electric car with the above system. Background technique [0002] For a long time, rechargeable batteries as the power source of electric vehicles have been the most important factor limiting the development of electric vehicles. In this regard, domestic and foreign institutions and related companies have invested a lot of manpower and material resources in research. Whether the battery can meet the requirements of electric vehicles in various sports situations (such as starting, climbing, accelerating, fast charging) needs to be based on the analysis and detection of the charging and discharging characteristics of the battery. [0003] The storage battery is the energy source of the electric vehicle. In order to ensure the good performance of the battery pack and prolong the service life of the battery, it is necessary to carry o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/44H02J7/00B60L11/18
CPCY02E60/12Y02T10/7005Y02E60/10Y02T10/70
Inventor 席守军徐增亮徐斐张华崔成吉李荣芬
Owner HANGZHOU JIENENG POWER
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