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Real-time Analysis and Calculation Method of Remaining Capacity of Li-ion Battery

A lithium-ion battery, real-time analysis technology, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve problems such as inaccurate judgment of battery power, achieve accurate power levels, and meet the effect of remaining power divisions

Active Publication Date: 2016-01-20
DONGGUAN TAIYE ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to aim at the deficiencies of the prior art, and to provide a battery that is more in line with the discharge law of the lithium-ion battery, can largely reduce the influence of the change of the voltage at both ends of the battery cell with the change of the load current, and can be finer. , A real-time analysis and calculation method for the remaining power value of the lithium-ion battery that more accurately estimates the power level, to meet the requirements for products with finer remaining power grids and more accurate electronics containing lithium-ion batteries, to overcome the existing technology. The method for calculating the remaining capacity of the battery cannot accurately judge the battery power, and can only be used for products containing lithium-ion batteries with simple functions and low requirements.

Method used

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  • Real-time Analysis and Calculation Method of Remaining Capacity of Li-ion Battery
  • Real-time Analysis and Calculation Method of Remaining Capacity of Li-ion Battery

Examples

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Embodiment 1

[0022] like figure 1 As shown, a real-time analysis and calculation method for the remaining power value of a single-cell lithium-ion battery provided in this embodiment includes the following steps:

[0023] The first step is to test the capacity of the battery first, charge the battery capacity to 100%, record the discharge curve of the single-cell battery voltage relative to the discharge time under different currents, and obtain the output current, battery voltage and discharge time. Data comparison table. Specifically, connect a single battery to the test circuit board, use an electronic load meter and an electrical parameter recording instrument to perform a discharge tracking test on the battery at the same time, and then store the battery voltage under four states of output current of 500mA, 1A, 1.5A and 2A respectively According to the change curve with time, the discharge curves in four states are obtained. Then divide the discharge time under the four states of 50...

Embodiment 2

[0031] like figure 2 As shown, a real-time analysis and calculation method for the remaining power value of two strings of lithium-ion batteries provided in this embodiment includes the following steps:

[0032]The first step is to test the capacity of the battery first, and select two batteries with equal or almost equal capacity to connect them in series (in order to improve the performance consistency of the two batteries, you can also test the parameters such as the internal resistance of the two batteries, and select several parameters Two batteries that are equal or close to each other are connected in series), and the battery capacity of the two batteries is charged to 100% to obtain a whole battery, and then record the discharge curve of the battery voltage at different currents relative to the discharge time to obtain the output current , battery voltage and discharge time three data comparison table. Specifically, the battery composed of two batteries connected in ...

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Abstract

The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a real-time analysis and calculation method for the remaining power value of lithium-ion batteries. Curve to obtain the data comparison table of output current, battery voltage and discharge time; translate the data comparison table into a three-dimensional array of discharge time, battery voltage and power level, and store the three-dimensional array in the microcontroller; During the process, products containing lithium-ion batteries are compared and analyzed according to the three-dimensional array stored in the single-chip microcomputer, and the power level is displayed. Compared with the prior art, the present invention can largely reduce the influence of the change of the voltage at both ends of the battery cell with the change of the load current, and can estimate the power level in a finer and more accurate manner, so as to meet the finer division of the remaining power , Requires more precise electronic requirements for products containing lithium-ion batteries.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a real-time analysis and calculation method for the remaining power value of the lithium-ion battery. Background technique [0002] In the field of lithium-ion battery applications, it is difficult to accurately estimate the power value of the lithium-ion battery itself with a simple method. Because the lithium-ion battery itself has internal resistance, when the external discharge current is different, the voltage at both ends of the battery will change significantly. Therefore, it is very inaccurate to judge the battery power only by the battery voltage, and the voltage at both ends of a single battery itself cannot fully reflect the true value of the power. [0003] At present, consumer electronics products such as mobile power supplies that contain lithium-ion batteries display the remaining power of the lithium-ion battery. Most of the methods are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
Inventor 李天吻何林
Owner DONGGUAN TAIYE ELECTRONICS CO LTD
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