Method for detecting and estimating remaining capacity of storage battery
A technology of remaining power and battery, applied in the direction of measuring electric variables, measuring electricity, measuring devices, etc., can solve problems such as large errors and inability to accurately estimate the remaining power of the battery
Active Publication Date: 2017-08-25
CHAOWEI POWER CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the defect that the remaining power estimation method in the prior art has large errors and cannot accurately estimate the remaining power of the battery, and provide a method for detecting and estimating the remaining power of the battery
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Embodiment
[0050] Embodiment: A method for detecting and estimating the remaining power of a battery, based on a system for detecting and estimating the remaining power of a battery, characterized in that the system installs a first current sensor in the main circuit of the battery, and the first current sensor is used to detect the discharged power of the battery, and the system A second current sensor is installed in the charging circuit of the battery. The second current sensor is used to detect the charging quantity of the battery. The system sets the number of discharge current detection and charging current detection to 10 times, and then uses the integral algorithm of the current value to calculate each time The discharge power and charging power of the battery during detection, the ratio of the sum of the discharge energy of the battery during each detection to the sum of the charging energy of the battery during each detection is the charging efficiency of the battery, where the s...
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The invention discloses a method for detecting and estimating the remaining capacity of a storage battery. The method comprises the steps: setting the number of discharge current detection times and the number of charge current detection times through a system, detecting the discharge capacity and charge capacity of the storage battery at each time in real time through a current integration method, wherein the proportion of the sum of the discharge energy of the storage battery at each time to the sum of the charge energy of the storage battery at each time is the charge efficiency of the storage battery, the sum of the discharge energy is the product of the sum of discharge energy and the mean value of open-circuit voltages, and the sum of charge energy is the product of the sum of charge energy and the charge mean voltage. Therefore, the remaining capacity of the storage battery after charging is the product of the sum of the original capacity of the storage battery and the charge efficiency with the charge capacity, and the remaining capacity of the storage battery after discharge is the difference between the original capacity of the storage battery and the discharge capacity. The method provided by the invention can accurately calculate the charge efficiency, enables the calculation of the remaining capacity during charge to be accurate, and enables the remaining capacity to be close to an actual value.
Description
technical field [0001] The invention relates to the field of storage batteries, in particular to a method for detecting and estimating the remaining power of the storage battery. Background technique [0002] At present, there are the following reactions in the charging process of the battery: one is used for the conversion of active substances, that is, the charged electricity undergoes material oxidation and reduction reactions according to Faraday's law. 转 ; The second is used for side reactions, including the decomposition of substances C 解 , fever C 热 etc. These energies are part of the loss. Because different batteries have different charging efficiencies, the traditional method for estimating the remaining power during charging has large errors and cannot accurately estimate the remaining power of the battery. [0003] Chinese Patent Publication No. CN 103217651A, published on July 24, 2013, an invention patent titled "A Method and System for Estimating the State of...
Claims
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IPC IPC(8): G01R31/36
CPCG01R31/382
Inventor 刘孝伟蒋林林
Owner CHAOWEI POWER CO LTD