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Battery charging method and device

A battery charging and battery charger technology, applied in battery circuit devices, circuit devices, secondary battery charging/discharging, etc., to achieve the effects of improving safety and cycle life, increasing charging speed, and eliminating polarization

Inactive Publication Date: 2017-03-22
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To increase the charging speed, it will bring safety risks

Method used

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  • Battery charging method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] figure 1 The flow chart of the embodiment of the battery charging method provided by the embodiment of the present invention, such as figure 1 As shown, the battery charging method provided by the embodiment of the present invention may specifically include the following steps:

[0042] 101. Perform pulse charging on the battery at least twice, and stop performing pulse charging on the battery until the voltage of the battery reaches a voltage threshold.

[0043] In the embodiment of the present invention, different positive electrode materials and negative electrode materials are used to make battery cells. Due to the different properties of the battery cell materials themselves, the performance of the battery is jointly determined. When the performance of the battery is difficult to change, the charging speed of the battery can be improved by reducing the charging time. Therefore, in the embodiment of the present invention, the battery is charged by means of pulse c...

comparative approach 1

[0075] Test temperature: room temperature

[0076] Charging condition setting: the constant current is 0.7C, the cut-off voltage is 4.4V, and the cut-off current is 0.05C.

[0077] Charging process: Use a constant current of 0.7C to charge the battery until the battery voltage reaches the cut-off voltage of 4.4V, and continue to use a constant voltage of 4.4V to charge the battery until the battery current reaches the cut-off current of 0.05C.

comparative approach 2

[0079] Test temperature: 0°C

[0080] Charging condition setting: constant current is 0.1C, cut-off voltage is 4.4V, cut-off current is 0.05C.

[0081] Charging process: Use a constant current of 0.1C to charge the battery until the battery voltage reaches the cut-off voltage of 4.4V, and continue to use a constant voltage of 4.4V to charge the battery until the battery current reaches the cut-off current of 0.05C.

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Abstract

The embodiment of the invention provides a battery charging method and device. The battery charging method provided by the embodiment of the invention comprises the steps of carrying out pulse charging on a battery at least twice and stopping pulse charging on the battery until voltage of the battery reaches a voltage threshold; and carrying out constant-voltage charging on the battery and stopping constant-voltage charging on the battery until current of the battery reaches cutoff current, wherein each pulse charging process includes the steps of carrying out constant-current charging on the battery by using first constant current; carrying out constant-current charging on the battery by using second constant current; and standing the battery. According to the battery charging method and device, battery standing is carried out in each pulse charging process, so that the polarization phenomenon of the battery in each charging process can be eliminated, the security of the battery is improved, the cycle life of the battery is prolonged, a discharging process is avoided in each pulse charging process and the charging time is shortened to improve the charging rate.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a battery charging method and device. Background technique [0002] With the continuous improvement of modern technology, people are more and more dependent on the terminal. As a battery that provides electrical energy for the terminal, how to enhance battery life and improve charging speed has attracted more and more attention. [0003] For charging the battery, the most common charging method in the prior art is: first charge with a constant current until the battery reaches a certain voltage, and then charge with a constant voltage until it reaches the cut-off current. Using this method for charging, if you want to increase the charging speed, you need to use a larger constant current to charge the battery, and the anode potential will drop rapidly due to the larger ohmic polarization and concentration polarization, which will cause lithium ions to The surface of the anode i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H02J7/00
CPCH01M10/44H02J7/00H02J2207/10Y02E60/10
Inventor 党琦郑强方占召龚美丽曾巧
Owner NINGDE AMPEREX TECH
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