A method for estimating the remaining capacity of a single battery based on internal resistance measurement
A single battery and remaining capacity technology, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems of long test time and inaccuracy, and achieve the effect of short test time
Active Publication Date: 2017-03-29
GOSUNCN TECH GRP
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Problems solved by technology
Although the online ampere-hour method can test the battery capacity without the battery being offline, the test time is relatively long and is not accurate enough.
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[0029] The preferred specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments. Considering that the backup power sources used by general communication base stations are lead-acid batteries, the batteries mentioned in this embodiment all refer to lead-acid batteries. A single cell is the basic unit of the lead-acid battery, and this embodiment calculates the remaining capacity of the lead-acid battery by estimating the remaining capacity of the single battery.
[0030] A method for estimating the remaining capacity of a single battery based on internal resistance measurement, such as figure 1 shown, including the following steps:
[0031] 1) Carry out a constant current discharge with a current value of I to the single battery;
[0032] 2) Measure the terminal voltage U1 and U2 of the si...
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The invention belongs to the field of communication base station or machine room power system, in particularly to a evaluation method for measuring single cell residual capacity based on internal resistance. The method comprises the steps of: performing constant-current discharge on the single cell with a current value of I; measuring terminal voltage U1 and U2 of the single cell before and after the discharge; according to the current value I and the terminal voltage U1 and U2, calculating the internal resistance R of the single cell; calculating the ratio (img file='3. TIF' wi='24' he ='25' / ) of the internal resistance of the single cell and the single cell standard resistance value; according to the ratio (img file='20131073750661000043. TIF' wi='24' he='25' / ), calculating the remaining residual capacity C of the single cell. The invention has advantages that: by means of high constant current discharge, compared with the method of an off-line discharge, test time is short, and the danger of power breakdown does not exist; compared with the method of an on-line ampere hour, the test time is short, the scheme tests a cell pack with 24 cells, only about one minute time is needed, and the method of the on-line ampere hour requires more than one hour.
Description
technical field [0001] The invention belongs to the field of power supply systems for communication base stations or machine rooms, and in particular relates to an estimation method for measuring the remaining capacity of a single battery based on internal resistance. Background technique [0002] Valve-regulated sealed lead-acid (VRLA) batteries are favored by various industries and widely used due to their small size, explosion-proof, stable voltage, no pollution, light weight, high discharge performance, small maintenance, and low price. It is widely used in post and telecommunications, electric power, transportation, aerospace, emergency lighting, military communication and many other fields. VRLA battery has become one of the key components of the system, and its safe and reliable operation is directly related to the reliable operation of the entire set of equipment. However, in the process of use, due to the inability to accurately predict the remaining capacity, the ...
Claims
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IPC IPC(8): G01R31/36
Inventor 丁士林
Owner GOSUNCN TECH GRP