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How to measure battery capacity

A measurement method and battery technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of misinterpretation, inability to directly measure the battery terminal voltage, etc., and achieve the effect of stable current output.

Inactive Publication Date: 2015-10-21
KYMCO +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] However, when the above-mentioned open circuit voltage method is applied to the lithium-iron unit battery, there will be the following problems: (1) The open-circuit voltage curve of the lithium-iron unit battery is relatively flat, and if the voltage value is directly measured, it may cause interpretation errors
(2) After the lithium-iron unit battery passes the cut-off voltage of charge and discharge, its voltage will continue to drift, so it is impossible to directly measure the battery terminal voltage as the judgment of the residual capacity

Method used

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Embodiment Construction

[0031] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] First please refer to Figure 1A , Figure 1B , Figure 1C , Figure 1D and Figure 1E A schematic diagram showing a battery series configuration of a battery structure according to an embodiment of the present invention.

[0033] The battery structure includes a three-element unit battery 11 and more than one lithium-iron unit battery 12, from Figure 1A to Figure 1E It is known that, regardless of the number of lithium-iron unit cells 12 , the three-element unit cells 11 and all the lithium-iron unit cells 12 are connected in series, and the arrangement sequence of the three-element unit cells 11 is not limited.

[0034] For example, the battery structure 10a and the battery structure 10b each have a three-element unit battery 11 and a lithium-iron unit battery 12, the order of the two is not limited, the three-element unit b...

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Abstract

The invention discloses a method for measuring electric quantity of a battery, and the method is suitable for a battery structure. The battery structure comprises a three-element unit battery and at least one lithium iron unit battery. The method for measuring the electric quantity comprises the first step of measuring the voltage or a current of the three-element unit battery to work out the remaining electric quantity of the three-element unit battery, and the second step of working out the current remaining electric quantity of the battery structure according to the remaining electric quantity of the three-element unit battery.

Description

technical field [0001] The invention relates to a battery structure and a power measurement method, in particular to a battery structure combined with a three-element unit battery and a power measurement method for obtaining the power of the whole battery structure by measuring the power of the three-element unit battery. Background technique [0002] Lithium-ion batteries are the main force for battery development. Lithium-ion batteries are the first choice in terms of energy density, energy efficiency, cycle life, charging time and safety. In order to maximize the performance of the battery and prolong the service life of the battery, a battery management system must be installed for detection. The main purpose of the battery management system is to obtain battery status information, performance adjustment and external protection of the battery. Among them, the battery is the most relevant to the user. Estimation of remaining power. The remaining power of the battery is c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
Inventor 黄昱仁林金亨林保成蔡祖扬林忠敬
Owner KYMCO
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