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Charging method for lithium ion battery, and charger

A technology of lithium-ion battery and charging method, which is applied in the direction of secondary battery charging/discharging, battery circuit device, secondary battery repair/maintenance, etc., and can solve problems such as lithium dendrite precipitation

Inactive Publication Date: 2012-07-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a lithium-ion battery charging method and charger, which can solve the problem of lithium dendrite precipitation, thereby improving the safety and service life of the battery

Method used

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  • Charging method for lithium ion battery, and charger
  • Charging method for lithium ion battery, and charger
  • Charging method for lithium ion battery, and charger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The embodiment of the present invention provides a charging method for a lithium-ion battery, such as figure 1 As shown, the method includes the following steps:

[0024] 101. A charging step, charging the lithium-ion battery at a certain charging rate within a preset charging time.

[0025] When charging the lithium-ion battery, a charging step is performed first, and the lithium-ion battery is charged with a preset certain charging rate within a preset charging time.

[0026] 102. A discharging step, discharging the lithium-ion battery at a certain discharge rate within a preset discharge time.

[0027] After the charging step is completed, the discharging step is performed, and the lithium-ion battery is discharged at a preset certain discharge rate within a preset discharge time.

[0028] The charge-discharge rate refers to the magnitude of the current value of the battery during the charge-discharge process, which is equal to the multiple of the rated capacity C ...

Embodiment 2

[0032] The embodiment of the present invention provides a charging method for a lithium-ion battery, such as figure 2 As shown, the method includes the following steps:

[0033] 201. A charging step, charging the lithium-ion battery at a certain charging rate within a preset charging time.

[0034] When charging the lithium-ion battery, a charging step is performed first, and the lithium-ion battery is charged with a preset certain charging rate within a preset charging time.

[0035] Wherein, the preset charging time is 2s-10s, and the charging rate is 0.2C-0.8C.

[0036] 202. A discharging step, discharging the lithium-ion battery at a certain discharge rate within a preset discharge time.

[0037] After the charging step is completed, the discharging step is performed, and the lithium-ion battery is discharged at a preset certain discharge rate within a preset discharge time. Wherein, the ratio of the preset charging time to the preset discharging time ranges from 2:1 t...

Embodiment 3

[0069] The embodiment of the present invention provides a charger, such as Figure 4 As shown, the charger includes a charging unit 41 , a discharging unit 42 and a control unit 43 .

[0070] The charging unit 41 is used to perform the charging step, and charge the lithium-ion battery at a certain charging rate within a preset charging time.

[0071] When the charger is charging the lithium-ion battery, the charging unit 41 of the charger is used to charge the lithium-ion battery first, and the lithium-ion battery is charged at a preset charging rate within a preset charging time. The charge rate is the current value required when the lithium-ion battery is charged to its rated battery capacity within a specified time.

[0072] Wherein, the preset charging time is 2s-10s, and the charging rate is 0.2C-0.8C.

[0073] The discharge unit 42 is used to perform a discharge step, and discharge the lithium-ion battery at a certain discharge rate within a preset discharge time.

[...

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Abstract

The embodiment of the invention provides a charging method for a lithium ion battery, and a charger, and relates to a battery charging technology. The problem that lithium dendritic crystal is precipitated can be solved, so that the safety of the battery is improved, and the service life of the battery is prolonged. The charging method comprises the following steps of: charging, namely charging the lithium ion battery within a preset charging time period at a certain charging rate; discharging, namely discharging the lithium ion battery within a preset discharging time period at a certain charging rate; and circulating the charging step and the discharging step. The embodiment of the invention is applied to charging of the lithium ion battery.

Description

technical field [0001] The invention relates to battery charging technology, in particular to a lithium ion battery charging method and a charger. Background technique [0002] At present, the application of lithium-ion batteries is becoming more and more extensive. In addition to being applied to portable devices such as mobile phones, notebooks, and cameras, lithium-ion batteries can also be applied to electric equipment such as electric bicycles, electric vehicles, and electric aircraft. In the prior art, there is a lithium-ion battery charging method with constant current and constant voltage, that is, a constant current is used to charge the lithium-ion battery with a constant current, and when the charging voltage of the lithium-ion battery reaches a preset voltage value, the preset voltage is used to charge the lithium-ion battery. The voltage of the voltage value is used to charge the lithium-ion battery at a constant voltage until the current of the lithium-ion batt...

Claims

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Application Information

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IPC IPC(8): H01M10/44H02J7/00
CPCY02E60/12Y02E60/10
Inventor 王兴杰
Owner HUAWEI TECH CO LTD
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