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Rapid charging method of rechargeable batteries

A technology for fast charging and rechargeable batteries, applied in the direction of secondary battery charging/discharging, secondary battery repair/maintenance, etc., to achieve the effect of fast charging and easy promotion

Inactive Publication Date: 2012-10-10
GUANGZHOU FULLRIVER BATTERY NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this type of method is used for fast charging, when the charging current reaches a certain value, the constant current charging cut-off voltage of the battery needs to be greatly increased. Therefore, it may cause more side reactions inside the battery due to the high voltage. occurs, thus affecting the service life of the battery, etc.; while the cut-off voltage of constant current charging is too low, the battery is difficult to be fully charged

Method used

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  • Rapid charging method of rechargeable batteries

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Example 1: Commercially available 601417HS15QC high-rate 3.7V60mAh polymer lithium-ion battery, the battery system material is lithium cobaltate and carbon system type single battery, the standard charging cut-off voltage U0=4.2V, ΔU=0.05*N, select when When N=0, ΔU=0, the selected constant voltage U=U0+ΔU=4.2V, the cut-off current I1 is numerically equal to 0.5C and 1C, and C is the charging rate, which is numerically equal to the rated capacity of the battery. The rated capacity of the battery is 60mAh, and the initial charging voltage is 3.0V.

[0039] Table 1

[0040] Charging method Charging system Actual charging initial current I0 (mA) Actual charging time (min) 1C discharge to 3V discharge capacity (mAh)

[0041] 1 60mA (1C) constant current charging to 4.2V to constant voltage charging, the current drops to 3mA (0.05C) to stop. 60 81.3 61.3

[0042] 2 Select U= 4.2V constant voltage charging, stop charging until the current decreases to 30mA (0.5C)...

Embodiment 2

[0045] Example 2: Commercially available 452026Fe15C fast charge type 3.2V100mAh polymer lithium ion battery, the battery system material is lithium iron phosphate and carbon system type single battery, the standard charge cut-off voltage U0=3.6V, ΔU=0.05*N, select when When N=0, ΔU=0, the selected constant voltage U=U0+ΔU=3.6V, the cut-off current I1 is numerically equal to 0.5C and 1C, and C is the charging rate, which is numerically equal to the rated capacity of the battery. The rated capacity of the battery is 100mAh, and the initial charging voltage is 2.0V.

[0046] Table 2

[0047] Charging method Charging system Actual charging initial current I0 (mA) Actual charging time (min) 1C discharge to 3V discharge capacity (mAh)

[0048] 1 100mA (1C) constant current charging to 3.6V to constant voltage charging, the current drops to 6.5mA (0.05C) to stop. 100 76.8 110.2

[0049] 2 Select U= 3.6V constant voltage charging, stop charging until the current decreases...

Embodiment 3

[0052] Example 3: Commercially available 452026HS10QC fast charge type 3.7V130mAh polymer lithium ion battery, the battery system material is lithium cobalt oxide and carbon system type single battery, the standard charge cut-off voltage U0=4.2V, ΔU=0.05*N, select when When N=-1, ΔU=-0.05V, the selected constant voltage U= U0+ΔU=4.15V, the cut-off current I1 is numerically equal to 0.5C and 1C respectively, and C is the charging rate, which is numerically equal to the rated value of the battery capacity. The rated capacity of the battery is 130mAh, and the initial charging voltage is 3.0V.

[0053] table 3

[0054] Charging method Charging system Actual charging initial current I0 (mA) Actual charging time (min) 1C discharge to 3V discharge capacity (mAh)

[0055] 1 130mA (1C) constant current charging to 4.2V to constant voltage charging, the current drops to 6.5mA (0.05C) to stop. 130 77.6 134.5

[0056] 2 Select U= 4.15V constant voltage charging, stop chargin...

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Abstract

The invention relates to a rapid charging method of rechargeable batteries and belongs to the field of batteries. Constant voltage U for batteries is selected in the invention, and the batteries undergo constant-voltage charge according to the constant voltage U. With the charging, initial charging current is gradually decreased. When the charging current is reduced to a certain cut-off current I1, the batteries cease to be charged. The constant voltage U selected for charging the batteries is a voltage higher than an initial charging voltage of the charged batteries. The value of the voltage is the standard charging cut-off voltage U0+delta U for the batteries of the material, numeric range of delta U is -0.2V-1V. Numeric range of the cut-off current I1 is 0.5C-15C, wherein C is charging rate and equals to rated capacity of the batteries in numerical value. The method provided by the invention is simple, effective, practical and easy to popularize. By the adoption of the method, batteries are rapidly charged with as much electric quantity as possible.

Description

technical field [0001] The fast charging method for a rechargeable battery of the invention belongs to the field of batteries, and in particular relates to a fast charging method for a lithium ion battery and a polymer lithium ion battery. Background technique [0002] The charging method and charging device of various rechargeable batteries is a fairly mature field. At present, the charging method commonly used in lithium-ion batteries is the charging method of constant current and constant voltage. This method takes a long time at constant voltage during the charging process. It is difficult to achieve the purpose of fast charging. With the rapid development of mobile electrical equipment, the fast charging performance of secondary lithium-ion batteries is also getting higher and higher. It is hoped to find a way to charge the battery in the shortest time. CN200610034990.6, CN200810029444, CN200810198973.5, etc. respectively disclose a fast charging method, respectively ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44
CPCY02E60/12H01M10/44Y02E60/10
Inventor 易世明成定波
Owner GUANGZHOU FULLRIVER BATTERY NEW TECH
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