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Lithium battery capacity quick detection method

A detection method and lithium battery technology, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problem of long battery capacity

Inactive Publication Date: 2008-01-09
周汉文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The time required for the above two tests of battery capacity is relatively long. The time required for the first test method is generally not less than 8 hours, and the test time required for the second test method is at least not less than 3 hours.

Method used

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Embodiment Construction

[0031] The rapid detection method of the lithium battery capacity, according to the charging and discharging curve of the lithium battery capacity, quickly detects the lithium battery capacity.

[0032] 1. The essence of lithium battery capacity (taking lithium ion battery as an example)

[0033] 1. Energy conversion: The reversible conversion between chemical energy and physical energy of lithium-ion batteries is different from nickel-cadmium and nickel-hydrogen batteries. What happens on the positive and negative plates of the battery is not a redox reaction, but a lithium Changes in ion concentration. When charging, the lithium ions on the positive plate are deintercalated from the positive electrode through the electrolyte and separator, and embedded in the carbon material layer of the negative electrode layer structure. The negative electrode is in a lithium-rich state, and the positive electrode is in a lithium-poor state. Discharging is the opposite. When the positive...

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Abstract

The invention relates to a Li battery capacity detecting method, a Li battery capacity fast detecting method, characterized in that: according to the charge-discharge curve of Li battery capacity, it makes fast detection for Li battery capacity. And the invention has feature of short test time.

Description

technical field [0001] The invention relates to a detection method for lithium battery capacity. Background technique [0002] There are many technical indicators to evaluate the quality of the battery, among which the capacity of the battery is one of the important technical indicators. The size of the battery capacity will be directly related to the length of time the battery can be used after a standard charge (QB / T2502-2000). Take lithium-ion batteries as an example; whether lithium (ion) batteries are in the production process or in the process of market circulation and sales, people pay attention to, test, and supervise the capacity of the battery. The standards for evaluating the capacity of lithium-ion batteries generally refer to the provisions of the two current standards in my country: [0003] 1. QB / T2502-2000 general specification for lithium-ion batteries; [0004] 2. GB / T18287-2000 General Specifications for Cellular Phone Lithium-ion Batteries. [0005] T...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 周汉文林浩祝诒沿
Owner 周汉文
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