Method and system for calculating percentage of dischargeable electric quantity of battery
A calculation method and percentage technology, which is applied to secondary batteries, measurement of electrical variables, secondary battery repair/maintenance, etc., can solve the problem of inaccurate calculation results of the battery’s dischargeable power percentage, improve calculation accuracy, and avoid The effect of voltage sag and avoiding cumulative error
Pending Publication Date: 2022-07-29
深圳市沃尔德储能技术有限公司
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Problems solved by technology
[0004] In order to solve the problem of inaccurate calculation results of the battery’s dischargeable power percentage, this application provides a calculation method and system for the battery’s dischargeable power percentage
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[0052] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below through the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.
[0053] The embodiment of the present application discloses a method for calculating the percentage of dischargeable power of a battery.
[0054] refer to figure 1 , the method includes:
[0055] 101. Perform one charge and discharge on the battery, and obtain the discharge power information and the discharge voltage change curve during the charge and discharge process;
[0056] Among them, the specific process of charging and discharging the battery once is as follows:
[0057] Constant current charging of the battery with a preset upper limit current value;
[0058] When reaching the pr...
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The invention discloses a method and system for calculating the percentage of dischargeable electric quantity of a battery, and the method comprises the steps: carrying out the primary charging and discharging of the battery, and obtaining a relation table between the actual capacity and discharged electric quantity of the battery and the voltage of the battery; detecting to obtain a current voltage value of the battery; according to the current voltage value and the discharged electric quantity and battery voltage relation table, a voltage remaining electric quantity value is obtained; performing integral calculation on the discharge voltage change curve according to the current voltage value to obtain an integral residual electric quantity value; calculating to obtain a voltage dischargeable electric quantity percentage and an integral dischargeable electric quantity percentage; calculating a difference value of the two percentages; when the difference value is smaller than the deviation threshold value, the voltage dischargeable electric quantity percentage or the integral dischargeable electric quantity percentage serves as the battery dischargeable electric quantity percentage; when the difference value is not smaller than the deviation threshold value, deviation correction is carried out, and the dischargeable electric quantity percentage of the battery is calculated. The problem that the calculation result of the dischargeable electric quantity percentage of the battery is not accurate is solved.
Description
technical field [0001] The present application relates to the field of battery technology, and in particular, to a calculation and system for the percentage of dischargeable power of a battery. Background technique [0002] Battery capacity refers to the amount of electricity that the battery can discharge under predetermined discharge conditions; rated capacity refers to the minimum capacity that should be released under certain discharge conditions according to industry-specified standards; actual capacity refers to the actual working conditions The battery is discharged, the actual amount of power released. [0003] In practical applications, the percentage of releasable power of a battery refers to the percentage of remaining power to battery capacity. Generally, the calculation method of the percentage of releasable electricity includes the integral method or the voltage method. The integral method relies on the evaluation of battery capacity. The battery capacity wil...
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IPC IPC(8): G01R31/3835H01M10/42H01M10/48
CPCG01R31/3835G01R31/3648H01M10/4285H01M10/48
Inventor刘湘雄宗谱平易跃海
Owner深圳市沃尔德储能技术有限公司