Battery charging and discharging current control method and method for using same to establish BMS (Battery Management System) model

A technology of discharge current and control method, which is applied in the field of establishing BMS (battery management system) model, which can solve the problems of limiting battery, adverse battery working capacity, battery performance and life expectancy, and achieve the effect of avoiding damage and good battery working capacity

Active Publication Date: 2016-01-13
SAIC MOTOR
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AI Technical Summary

Problems solved by technology

However, in the current battery charge and discharge process, it is easy to have overcharge or overdischarge and affect the performance and life of the battery, or it is easy to limit the charge and discharge of the battery too much

Method used

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  • Battery charging and discharging current control method and method for using same to establish BMS (Battery Management System) model
  • Battery charging and discharging current control method and method for using same to establish BMS (Battery Management System) model
  • Battery charging and discharging current control method and method for using same to establish BMS (Battery Management System) model

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Embodiment Construction

[0034]The following introduces some of the possible embodiments of the present invention, which are intended to provide a basic understanding of the present invention, but are not intended to identify key or decisive elements of the present invention or limit the scope of protection. It is easy to understand that, according to the technical solution of the present invention, those skilled in the art may propose other alternative implementation manners without changing the essence and spirit of the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0035] figure 1 Shown is a schematic diagram of the relationship between electronic control units including a battery management system of an electric vehicle. The newly...

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Abstract

The invention provides a battery charging and discharging current control method and a method for using the battery charging and discharging current control method to establish a BMS (Battery Management System) model, and belongs to the technical field of electric automobile charging and discharging. The control method comprises the following steps: monitoring actual battery charging/discharging current value of a battery; if the battery charging/discharging current value is smaller than or equal to a first current value (ichg_cont_A, idischg_cont_A) of the battery under current working condition, carrying out regressive calculation on battery charging/discharging ability value, and if the battery charging/discharging current value is greater than the first current value of the battery under the current working condition and is smaller than a second current value (ichg_peak_A, idischg_peak_A), carrying out accumulative calculation on the battery charging/discharging ability value; and judging whether the battery charging/discharging ability value is greater than or equal to the maximum allowable value, if yes, limiting the battery charging/discharging current value to be smaller than or equal to the first current value. The control method can protect the battery and can also give full play to the battery operating ability, and the BMS model established by using the method provided by the invention can accurately simulate the battery charging/discharging ability.

Description

technical field [0001] The invention belongs to the technical field of charging and discharging batteries of electric vehicles, and relates to a battery charging / discharging current control method of electric vehicles and a method for establishing a BMS (battery management system) model using the method. Background technique [0002] The storage battery (that is, the power battery) is a coupled comprehensive system of electrical system, thermal system and chemical system. Its charging and discharging process is an extremely complex dynamic electrochemical process accompanied by temperature changes. It is highly nonlinear and involves electricity, thermal and chemical factors. While electric vehicles (for example, pure electric vehicles, Plug-in (plug-in) hybrid electric vehicles) are frequently in the state of alternating charge and discharge during driving, the battery management system (Battery Management System, BMS) can work on the battery The situation is managed. Spe...

Claims

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Application Information

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IPC IPC(8): H01M10/44G01R31/36
CPCY02E60/10
Inventor 朱军马成杰陆珂伟林潇陈松先张霏霏王林
Owner SAIC MOTOR
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