Self-learning charging power current control method and system
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A charging power and current control technology, applied to battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of poor consistency and inability to eliminate, and achieve the effect of protecting the battery
Active Publication Date: 2016-06-29
HUIZHOU BNET TECH CO LTD
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[0002] At this stage, the battery management system estimates the allowable maximum power current during charging mainly depending on the temperature and SOC value according to the table provided by the battery manufacturer. In this way, the SOC and temperature measurement error will cause the charging power
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[0039] Example one
[0040] The first embodiment of the present invention provides a self-learning charging power current control method, figure 1 It is the method flow chart of the first embodiment of the present invention, please refer to figure 1 , The method of the embodiment of the present invention includes the following steps:
[0041] Step S100: Before charging, obtain the current allowable charging power current value according to the current charging power meter, and control the battery to start charging.
[0042] Step S101: Memory battery status parameters at preset frequency during battery charging, such as 10MS memory one-time ampere hour, total voltage, cell voltage, current and temperature, △AH10MS, △SUMV10MS, △VOLT10MS, △CUR10MS, △T10MS ;
[0043] Step S102: Calculate the variation of each battery state parameter in the time period corresponding to the preset frequency within the preset time length, such as the memory ampere-hour data variation △AH10MS0, △AH10MS1, △AH1...
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[0053] Example two
[0054] The second embodiment of the present invention provides a self-learning charging power current control system. reference figure 2 The system includes a battery state parameter memory module, a battery state parameter change amount calculation module, a battery state parameter change amount difference calculation module, a reference allowable charging power current value determination module, a correction module and a display module; the battery state parameter change amount The calculation module, the battery state parameter change amount difference calculation module, the reference allowable charging power current value determination module, the display module and the correction module are respectively communicatively connected with the battery state parameter memory module;
[0055] The battery state parameter memory module is used to memorize battery state parameters at a preset frequency and generate or update a charging power meter during battery ...
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Abstract
The invention discloses a self-learning charging power current control method and system. The method comprises the following steps: memorizing battery state parameters at a preset frequency in a battery charging process; calculating variations of the battery state parameters in a time period corresponding to the preset frequency within a preset time length; calculating difference values between every two adjacent variations; determining a reference allowed charging power current value according to the difference values between adjacent variations and a variation process of the battery state parameters, and recording the reference allowed charging power current value as I0; and detecting a current actual allowed charging power current value output in real time, recording the current actual allowed charging power current value as I1, comparing the I0 with the I1, correcting an actual I1 value into the I0 if an offset exists between the I0 and the I1, and keeping the I1 value constant if the offset does not exist. Through adoption of the self-learning charging power current control method and system, an allowed charging power current value of a battery pack under different aging degrees and in different environments can be calculated accurately; a charging power current data table is generated automatically and updated online at any time in real time; batteries are protected effectively; and the service lives of the batteries are prolonged.
Description
technical field [0001] The present invention relates to the technical field of power supply management, and more specifically, relates to a self-learning charging power current control method and system. Background technique [0002] At this stage, the battery management system estimates the allowable maximum power current during charging mainly depending on the temperature and SOC value according to the table provided by the battery manufacturer. In this way, the SOC and temperature measurement error will cause the charging power current estimation error. This method depends on the battery manufacturer. The original data, and it is impossible to eliminate the error caused by the characteristic change and consistency deterioration caused by battery aging, environmental changes, etc. after the battery is connected in series and parallel. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned defects in the prior art, and pr...
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