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Charge mode of lithium ion battery

A lithium-ion battery and charging method technology, applied in the field of lithium-ion battery charging methods, can solve the problems of inability to quantitatively control the charging process, long charging time, low charging efficiency, etc. simple effect

Active Publication Date: 2019-03-22
东莞赣锋电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method disclosed in this patent is obviously to simply divide the entire charging process of the lithium-ion battery into multiple stages to prevent the lithium-ion battery from being overcharged. However, the direct result of this method is that the charging time is too long, and the charging process cannot be quantified. control, low charging efficiency

Method used

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  • Charge mode of lithium ion battery
  • Charge mode of lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0090] 1) Set the charging current as 0.08C, 0.1C, 0.12C, 0.14C, 0.16C, 0.18C, 0.2C, 0.22C, 0.24C, 0.26C, and the charging time as 10min, 9min, 8min, 7min, 6min, 5min, 4min, 3min, 2min, 1min; set the charging cut-off voltage to 4.2V, the charging cut-off current to 0.01C, place the battery in an environment of 0°C, and charge and discharge the battery;

[0091] 2) Charge with a current of 0.08C for 10min, then rest for 5s, then discharge with a current of 0.02C for 10s, and then rest for 5s;

[0092] 3) Charge with a current of 0.1C for 9min, then rest for 5s, then discharge with a current of 0.02C for 10s, and then rest for 5s;

[0093] 4) Charge with a current of 0.12C for 8min, then rest for 5s, then discharge with a current of 0.02C for 10s, and then rest for 5s;

[0094] 5) Charge with a current of 0.14C for 7min, then rest for 5s, then discharge with a current of 0.02C for 10s, and then rest for 5s;

[0095] 6) Charge with a current of 0.16C for 6min, then rest for 5s,...

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Abstract

The invention provides a charge mode of a lithium ion battery. The charge mode is particularly applicable to multiple times of circulated charge of lithium ion batteries at a low temperature of 0-15 DEG C. According to the mode, under the condition of a certain core capacity, an initial value of charge current and an initial value of charge time, equal ratio or arithmetic progressions are set, charge circulation times are calculated according to a processor with a simulation circuit, within the circulation times, a lithium ion battery is charged with power with a positive pulse current which is increased gradually matched with a small negative pulse current in a static charge mode, then the portability of polarization of the lithium ion battery is reduced, and the service life of the lithium ion battery is prolonged. After the lithium ion battery is subjected to multiple times of circulated charge by using the method, the capacity retention rate is relatively high, that is, up to 93% or greater.

Description

technical field [0001] The invention belongs to the technical field of battery charging, and in particular relates to a charging method for a lithium ion battery. Background technique [0002] The charging and discharging process of lithium-ion batteries is the intercalation and deintercalation process of lithium ions. When charging a lithium-ion battery, lithium ions are generated at the positive electrode, and the generated lithium ions move to the negative electrode through the electrolyte. The carbon used as the negative electrode has a layered structure with many micropores. Lithium ions that reach the negative electrode are embedded in the micropores of the carbon layer. The more lithium ions are embedded, the higher the charging capacity. Similarly, when the battery is discharged, the lithium ions embedded in the carbon layer of the negative electrode come out and move back to the positive electrode. The more lithium ions returned to the positive electrode, the high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44
CPCH01M10/44Y02E60/10
Inventor 王乾白羽戈志敏戴小勇
Owner 东莞赣锋电子有限公司
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