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A power control method for a battery management system

A battery management system and power control technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of over-discharge of battery packs, driving risks, and lack of power control in battery management systems, achieving high accuracy and extended The effect of service life

Active Publication Date: 2015-08-19
HUIZHOU EPOWER ELECTRONICS
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AI Technical Summary

Problems solved by technology

[0002] Most of the current battery management systems do not have power control, and the vehicle cannot obtain the maximum allowable discharge power of the battery pack in time, which may cause the risk of over-discharge of the battery pack; when the power of the battery pack reaches the critical lower limit, if there is an instantaneous high power output, It will also cause the lowest single battery to reach the lower voltage limit in an instant and be suddenly protected, which will bring driving risks

Method used

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  • A power control method for a battery management system
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  • A power control method for a battery management system

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Embodiment Construction

[0023] In order to facilitate those skilled in the art to understand the technical content of the present invention, the present invention will be further described in detail below in conjunction with the embodiments.

[0024] A power control method for a battery management system disclosed in the present invention includes:

[0025] 1) First, establish a two-dimensional power table of the maximum allowable discharge power, temperature, and SOC, as shown in Table 1, and fill in the maximum allowable discharge power under different temperature and SOC values.

[0026]

[0027] Table 1

[0028] 2) Then detect the voltage of each battery cell in the battery pack and the temperature and SOC value of the battery pack under the current working state, look up the table and estimate the current maximum allowable discharge power value P of the battery pack according to the linear interpolation method.

[0029] The method for detecting the voltage of each battery cell in the battery...

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Abstract

Provided is a power control method of a battery management system. The power control method of the battery management system includes the following steps: building a maximum allowable discharge power and temperature, and a two dimensional power meter of a stress optical coefficient (SOC); detecting the temperature and the SOC value under the current working mode of each battery monomer voltage in a battery pack and the battery pack, checking the chart and estimating the current maximum allowable discharge power P of the battery pack according to a linear interpolation method; finding out the battery monomer voltage value with the lowest voltage in the battery pack, setting the maximum allowable target discharge power at the moment according to the battery monomer voltage value; delivering the given maximum allowable target discharge power to the finished vehicle controller which carries out the relevant control.

Description

technical field [0001] The invention relates to battery management technology, in particular to a power control method of a battery management system. Background technique [0002] Most of the current battery management systems do not have power control, and the vehicle cannot obtain the maximum allowable discharge power of the battery pack in time, which may cause the risk of over-discharge of the battery pack; when the power of the battery pack reaches the critical lower limit, if there is an instantaneous high-power output, It will also cause the lowest single battery to reach the lower voltage limit in an instant and be suddenly protected, which will bring driving risks. Contents of the invention [0003] In order to overcome the above-mentioned defects in the prior art, the present invention provides a method for a battery management system to support multiple charging protocols. [0004] The technical scheme adopted in the present invention is: [0005] A power con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 刘飞文锋阮旭松方德光
Owner HUIZHOU EPOWER ELECTRONICS
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