Methods for detecting actual capacity, residual capacity, standby time and health condition of battery

A technology of battery remaining capacity and detection method, applied in the direction of measuring electrical variables, measuring current/voltage, measuring electricity, etc., can solve the problem of difficulty in quantifying the degree of decline, and cannot reflect the health status of the battery, and achieve the effect of improving accuracy

Active Publication Date: 2011-05-25
VERTIV CORP
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Problems solved by technology

[0012] It can be seen that the traditional detection method is based on the assumption that "the actual capacity of the battery after equalization is equal to the nominal capacity of the battery", but in fact the actual capacity of the battery (corresponding to the state of health of the battery) increases with the use of the battery. It is constantly declining, and the degree of decline is difficult to quantify, so the traditional method cannot reflect the health status of the battery

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  • Methods for detecting actual capacity, residual capacity, standby time and health condition of battery
  • Methods for detecting actual capacity, residual capacity, standby time and health condition of battery
  • Methods for detecting actual capacity, residual capacity, standby time and health condition of battery

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Embodiment Construction

[0046] During multiple discharges of the battery, the attenuation degree of the battery can be reflected by recording and comparing the amount of electricity released when each discharge is placed at a certain set voltage. In this paper, the recorded percentage value of the current discharge capacity of the battery to the last discharge capacity is called the battery decay ratio.

[0047] Please refer to figure 1 , the battery actual capacity detection method of the present invention comprises the following steps:

[0048] Step A1. Measure the discharge power during the battery discharge process, and record the discharge power once when the battery voltage drops to a set threshold;

[0049] Step A2. Take the initial value of the battery attenuation ratio as 100%. From the second discharge recorded by the battery, after discharge, multiply the battery attenuation ratio by the ratio of the current discharge power to the last discharge power to correct the battery attenuation ra...

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Abstract

The invention discloses a method for detecting the actual capacity of a battery, which comprises the following steps: (A1) measuring discharge quantity in the battery discharge process, and recording the discharge quantity when the battery voltage is reduced to a set threshold; (A2) setting the initial value of battery attenuation ratio as 100%, and multiplying the battery attenuation ratio by the ratio of the discharge quality this time to the discharge quantity last time after discharge from the recorded second discharge, thus obtaining the corrected battery attenuation ratio; and (A3) multiplying the nominal capacity of the battery by the newly corrected battery attenuation ratio, thus obtaining the actual capacity of the battery. The invention also discloses methods for detecting the residual capacity, the residual standby time and the health condition of a battery based on the method for detecting the actual capacity of a battery. By using the methods disclosed by the invention, the service condition and health state of the battery can be accurately obtained.

Description

technical field [0001] The invention relates to battery detection, in particular to a method for detecting the actual capacity of the battery, a method for detecting the remaining capacity of the battery, a method for detecting the remaining battery backup time, and a method for detecting the health status of the battery. Background technique [0002] For a long time, the accurate measurement of battery capacity in the communication power supply system is a function that users urgently need. The mainstream communication power supply suppliers basically use the following methods to detect the remaining battery capacity: [0003] - At the end of the equalization charge, correct the actual capacity of the battery to the nominal capacity of the battery; [0004] - On this basis, calculate the remaining capacity of the battery through the cumulative battery (charging or discharging) current; [0005] - When the battery is charging, it is corrected by the charging efficiency; ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G01R19/17
Inventor 曹丰年蔺百安杨靖
Owner VERTIV CORP
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