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Lithium ion battery pack charging method and device and terminal equipment

A lithium-ion battery and charging method technology, applied in battery circuit devices, secondary battery charging/discharging, circuit devices, etc., can solve problems such as battery voltage increase, charging current increase, affecting the service life of lithium-ion battery packs, etc. , to achieve the effect of prolonging life and reducing current impact

Active Publication Date: 2019-06-14
江西猛犸电动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a lithium-ion battery pack charging method, device and terminal equipment to solve the problem in the prior art when the voltage of some single cells in the lithium-ion battery pack has not reached the constant voltage threshold. , that is, to charge the lithium-ion battery pack through constant voltage, so that the aging or unbalanced battery voltage suddenly increases, and the charging current suddenly increases, which seriously affects the service life of the lithium-ion battery pack.

Method used

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  • Lithium ion battery pack charging method and device and terminal equipment
  • Lithium ion battery pack charging method and device and terminal equipment
  • Lithium ion battery pack charging method and device and terminal equipment

Examples

Experimental program
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Embodiment 1

[0038] Such as figure 1 As shown, this embodiment provides a method for charging a lithium-ion battery pack, which can be applied to terminal devices such as a lithium-ion battery pack smart charging device and a lithium-ion battery pack charger. The charging method of the lithium ion battery pack provided in this embodiment includes:

[0039] S101. Obtain the voltage of each single cell in the lithium-ion battery pack, and compare the voltage of each single cell; wherein, the lithium-ion battery pack includes two or more single cells connected in series end-to-end.

[0040] In specific applications, obtain the voltage of each single cell in the lithium-ion battery pack, and compare the voltage of each single cell in the lithium-ion battery pack; among them, the lithium-ion battery pack includes two or more end-to-end serial connections Single battery.

[0041] S102. When the voltage of the single battery with the smallest voltage value is less than the first preset voltage, charge ...

Embodiment 2

[0066] Such as figure 2 As shown, this embodiment provides a lithium-ion battery pack charging device 100, which is used to perform the method steps in the first embodiment. The charging device 100 for a lithium ion battery pack provided in this embodiment includes:

[0067] The comparison module 101 is used to obtain the voltage of each single battery in the lithium ion battery pack and compare the voltage of each single battery; wherein, the lithium ion battery pack includes two or more end-to-end serial connections Single battery

[0068] The first charging module 102 is configured to charge the lithium ion battery pack through the first preset constant current when the voltage of the single battery with the smallest voltage value is less than the first preset voltage The voltage of the single battery is greater than the first preset voltage;

[0069] The second charging module 103 is used to charge the lithium-ion battery pack through a second preset constant current when the ...

Embodiment 3

[0083] image 3 It is a schematic diagram of a terminal device provided by an embodiment of the present invention. Such as image 3 As shown, the terminal device 3 of this embodiment includes: a processor 30, a memory 31, and a computer program 32 stored in the memory 31 and running on the processor 30, such as a charging program for a lithium ion battery pack. When the processor 30 executes the computer program 32, the steps in the above embodiments of the charging method for each lithium ion battery pack are implemented, for example figure 1 Steps S101 to S106 are shown. Alternatively, when the processor 30 executes the computer program 32, the function of each module / unit in the foregoing device embodiments is implemented, for example figure 2 The functions of modules 101 to 106 are shown.

[0084] Exemplarily, the computer program 32 may be divided into one or more modules / units, and the one or more modules / units are stored in the memory 31 and executed by the processor 3...

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Abstract

The invention is suitable for the technical field of lithium ion batteries, and provides a lithium ion battery pack charging method and device and terminal equipment. The method comprises the steps of: obtaining voltage of each unit battery in a lithium ion battery pack and comparing the voltage; when the voltage of the unit battery with the minimum voltage value is smaller than first preset voltage, carrying out charging through first preset constant current until the voltage of the unit battery with the minimum voltage value is greater than the first preset voltage, and carrying out chargingthrough second preset constant current until the voltage of the unit battery with the minimum voltage value is greater than second preset voltage; and carrying out charging through third preset constant current until the voltage of any unit battery in the lithium ion battery pack achieves corresponding cut-off voltage, obtaining a current voltage sum of each unit battery as constant charging voltage, carrying out charging through the constant charging voltage and stopping charging when the charging current is decreased to a preset threshold value. According to the method current impact causedto the unit batteries with relatively low voltage in the charging process is decreased and the service life of the lithium ion battery pack is prolonged.

Description

Technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a charging method, device and terminal equipment of a lithium ion battery pack. Background technique [0002] Currently, lithium-ion battery packs are charged with constant current and constant voltage. In the constant current stage, the battery pack is charged with a constant current. When the battery pack voltage reaches a certain threshold, it switches to constant voltage charging. When the battery charging current After reaching a certain condition, the charging ends, and the voltage at this time is a fixed value. [0003] However, lithium-ion battery packs may have problems such as aging or imbalance. When the lithium-ion battery pack is charged by the above method, when the voltage of some single cells in the lithium-ion battery pack has not reached the constant voltage threshold, that is, The lithium-ion battery pack is charged by constant voltage, so t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H02J7/00
CPCY02E60/10
Inventor 吴明舒星
Owner 江西猛犸电动科技有限公司
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