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SOC calibration method of hybrid power cell

A calibration method and hybrid technology, applied in the measurement of electrical variables, measuring devices, instruments, etc., can solve problems such as errors in the calculation method of battery SOC, reduce accumulated errors, avoid over-discharge and over-charge phenomena, and avoid over-charge phenomena Effect

Active Publication Date: 2016-01-27
CHANGSHA CRRC INTELLIGENT CONTROL & NEW ENERGY TECH CO LTD
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Problems solved by technology

[0007] The purpose of the present invention is to provide a hybrid power battery SOC calibration method to solve the technical problem that the existing battery SOC calculation method has large errors

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  • SOC calibration method of hybrid power cell
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Embodiment Construction

[0042] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0043] An embodiment of the present invention provides a method for calibrating the state of charge of a hybrid power battery, which can be used for calibrating the SOC of a power battery in a hybrid power system.

[0044] Such as figure 1 As shown, the hybrid system usually consists of an engine, an ISG motor, a clutch, a drive motor, and a power battery. figure 1 The thicker solid line represents the mech...

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Abstract

The invention, which belongs to the technical field of the electric car, discloses a state-of-charge calibration method of a hybrid power cell. With the method, a technical problem of large error of the existing SOC calculation method can be solved. The calibration method comprises: a usage upper limit and a usage lower limit of a state of charge of a cell are obtained; a lower limit voltage corresponding to the usage lower limit as well as an upper limit voltage corresponding to the usage upper limit are obtained; when the voltage of the cell is lower than the lower limit voltage, the state of charge of the cell is corrected to be the usage lower limit; and when the voltage of the cell is higher than the upper limit voltage, the state of charge of the cell is corrected to be the usage upper limit.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a hybrid power battery SOC calibration method. Background technique [0002] The power battery is suitable for various types of hybrid systems due to its large charge / discharge rate. For a hybrid power system using a single power battery as an energy storage unit, the vehicle does not require external charging. [0003] The operation mode of the hybrid electric vehicle is limited by the range of use of the state of charge (State Of Charge, SOC for short) of the battery. When the battery SOC is at a high or low level, the internal resistance of the battery increases, and the voltage change caused by the charging / discharging current is large, which is not conducive to the stable operation of vehicle components. At present, hybrid power systems generally use the middle section of battery SOC. By setting the upper limit and lower limit of battery SOC, electrical component...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
Inventor 汪伟宋超席力克谢勇波李晟文多朱田李双龙文健峰
Owner CHANGSHA CRRC INTELLIGENT CONTROL & NEW ENERGY TECH CO LTD
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