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Lithium battery charging method and device

A charging method and lithium battery technology, applied to battery circuit devices, circuit devices, collectors, etc., can solve problems such as difficulty in meeting charging requirements and low charging efficiency

Pending Publication Date: 2021-01-29
JIANGSU RUNIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When charging a lithium battery, the charging end will generate losses. Specifically, the loss is proportional to the voltage difference between the output voltage of the charging end and the battery voltage. For example, the current for the lithium battery is 1A, and the output voltage of the charging end is 5V. , the voltage of the lithium battery at the receiving end is 3.0V, the efficiency loss is (5V-3V)*1A=2w, and the effective power, that is, the energy obtained by the lithium battery is: 3V*1A=3w, and the charging efficiency is only: 3w / (2w +3w) = 60%
The low charging efficiency makes it difficult to meet the current demand for charging

Method used

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  • Lithium battery charging method and device

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0039] Such as figure 1 As shown: in order to effectively improve the charging efficiency of the lithium battery BT1, the lithium battery charging method of the present invention includes a power supply terminal 1 connected to an external power supply and a charging terminal 2 adapted to connect with the power supply terminal 1, through the charging terminal 2. It can be adapted and connected with the lithium battery BT1 to be charged; when charging the lithium battery BT1, the charging process includes the first charging control state and the second charging control state, wherein,

[0040] After charging the lithium battery BT1, collect the load current when charging the lithium battery BT1, and enter the first charging control state when the collected load current is greater than the load current threshold ITH;

[0041] After entering the first charging con...

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PUM

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Abstract

The invention relates to a lithium battery charging method and device. The charging process comprises a first charging control state and a second charging control state. The lithium battery charging method comprises the steps of: after entering a first charging control state, reducing a power supply voltage output by a power supply end and keeping the charging of a lithium battery BT1 by the charging end until a voltage difference between the power supply voltage output by the power supply end and the lithium battery BT1 is smaller than a preset voltage threshold VTH, stopping charging the lithium battery BT1 by the charging end and entering a second charging control state; and after entering the second charging control state, when an acquired load current is smaller than a load current threshold ITH, boosting the power supply voltage output by the power supply end, and recovering a charging state of the lithium battery BT1 by the charging end until the acquired load current during charging is greater than the load current threshold ITH or the power supply voltage output by the power supply end is in a rated voltage state. The lithium battery charging method and the device can effectively improve the charging efficiency of the lithium battery, and are safe and reliable.

Description

technical field [0001] The invention relates to a charging method and device, in particular to a lithium battery charging method and device. Background technique [0002] At present, charging the lithium battery includes a charging terminal connected to the lithium battery and a power supply terminal connected to an external power source, and the effective charging of the lithium battery is realized through the cooperation of the power supply terminal and the charging terminal. When charging, the required voltage can be generated through the power supply terminal, the charging current and the maximum output voltage can be controlled through the charging terminal, that is, the constant current / constant voltage control can be realized through the charging terminal, and the battery voltage gradually increases from a certain voltage during charging. [0003] When charging a lithium battery, the charging end will generate losses. Specifically, the loss is proportional to the volt...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/00714H02J7/007182
Inventor 陈炳杰张明焦炜杰
Owner JIANGSU RUNIC TECH CO LTD
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