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A stepwise progressive charge management method and system for a lithium battery

A charging management, lithium battery technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as life reduction, and achieve the effect of shortened service life and safe use process

Active Publication Date: 2021-02-26
邓耘
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a stepwise charging management method and system for a lithium battery, which is mainly aimed at the charging management system of the lithium battery of the energy storage power supply, and solves the problem that the lithium battery of the energy storage power supply is in a 100% full state for a long time, resulting in a shortened lifespan. Compared with lithium batteries that are 100% full for a long time, the service life can be increased by 3 times, and the effective service life can reach more than 12 years

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  • A stepwise progressive charge management method and system for a lithium battery
  • A stepwise progressive charge management method and system for a lithium battery
  • A stepwise progressive charge management method and system for a lithium battery

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Embodiment 1

[0046] Please refer to figure 2 , figure 2 It is a schematic flow chart of a stepwise progressive charge management method for a lithium battery in an embodiment of the present invention, as shown in figure 2 As shown, this embodiment provides a stepwise progressive charging management method for lithium batteries, which is used for charging management of lithium batteries as energy storage power sources, including the following steps:

[0047] S101. Classify the end-of-charge voltage of the lithium battery according to the SOC-OCV curve of the state of charge of the lithium battery to obtain a step voltage of the end-of-charge voltage.

[0048] S102. Periodically detect the actual battery capacity of the lithium battery, and judge whether the actual battery capacity of the lithium battery is less than a preset capacity threshold, and the preset capacity threshold corresponds to the charge termination voltage of each level.

[0049] S103. When the actual battery capacity ...

Embodiment 2

[0056] Please refer to Figure 4 , Figure 4 For the embodiment of the present invention figure 2 The specific flowchart of step S101 in the embodiment, as Figure 4 As shown, step S101 includes the following steps:

[0057] S201. Obtain the range value of the end-of-charge voltage from the SOC-OCV curve of the lithium battery state of charge.

[0058] S204. Set an initial charging termination voltage based on the minimum value of the charging voltage range value, and set a final charging termination voltage based on the maximum value of the charging voltage range value.

[0059] S203. Grading the voltage between the initial charging termination voltage and the final charging termination voltage to form a step voltage of the charging termination voltage.

[0060] Wherein, the range value of the above-mentioned end-of-charging voltage can be 60%-100%, and the corresponding charging voltage between 60%-100% full is obtained, and the charging voltage in this range is divided...

Embodiment 3

[0063] Please refer to Figure 5 , Figure 5 For the embodiment of the present invention figure 2 The specific flowchart of step S103 in the embodiment, as Figure 5 As shown, step S101 includes the following steps:

[0064] S301. When the actual battery capacity of the battery is less than a preset capacity threshold, detect whether the current termination voltage is the final charging termination voltage.

[0065] S302. If the current termination voltage is not the final charging termination voltage, adjust the level of the current termination voltage to a charging termination voltage of a next level according to the stepped voltage.

[0066] S303. If the current termination voltage is the final charging termination voltage, prompt to replace the lithium battery.

[0067] Detect whether the current end-of-charge voltage is the final end-of-charge voltage. If it is the end-of-charge voltage, it means that the level of the end-of-charge voltage cannot be adjusted. If it i...

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Abstract

The present invention is applicable to the field of battery technology, and provides a stepwise progressive charging management method and system for lithium batteries. The end-of-charge voltage is graded to obtain the step voltage of the end-of-charge voltage; the battery capacity of the lithium battery is periodically detected, and it is judged whether the battery capacity of the lithium battery is less than a preset capacity threshold, and the preset The capacity threshold corresponds to the end-of-charge voltage of each level; when the actual battery capacity of the lithium battery is less than the preset capacity threshold, the level of the end-of-charge voltage of the lithium battery is adjusted. It can prevent the storage battery from being in a full state for a long time and shorten the service life of the storage battery, so that the use process of the storage battery is safer.

Description

technical field [0001] The invention belongs to the technical field of energy storage power supplies, and in particular relates to a stepwise progressive charge management method and system for a lithium battery. Background technique [0002] Lithium batteries are used as backup emergency power for energy storage battery applications, such as backup emergency power for communication base stations, special emergency power for fire-fighting emergency lighting, emergency backup power for fire-fighting equipment, and fire-fighting emergency evacuation lighting and sign lamps with their own batteries. Lithium battery charging and discharging management system, the charging management process is as follows: the front stage uses constant current charging, the general current is set to 0.2C ~ 1C, when the battery voltage is close to 4.20V, the last stage is changed to constant voltage charging, and the charging voltage is kept at 4.20V When the charging is over, the lithium battery ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/04
CPCH02J7/045
Inventor 邓耘邓晓白
Owner 邓耘