Electric quantity balancing and charging method for lithium cell

A technology of power balance 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 the decline of charging capacity of serially connected lithium batteries

Inactive Publication Date: 2006-07-26
AMITA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a charging and discharging method will cause the differences of the batteries in the lithium battery pack to accumulate continuously under repeated cycles, causing the overall charging capacity of the lithium batteries connected in series to decline rapidly.

Method used

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  • Electric quantity balancing and charging method for lithium cell
  • Electric quantity balancing and charging method for lithium cell
  • Electric quantity balancing and charging method for lithium cell

Examples

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Embodiment Construction

[0014] The present invention provides a lithium battery power balance and charging method, which uses a low-point discharge method to make each lithium battery connected in series reach a power balance, so as to reduce the loss of power between each lithium battery under repeated cycles of charging and discharging. The difference that continues to accumulate.

[0015] When charging and discharging a series-connected lithium battery pack, due to the production error of each lithium battery, there will be differences in the storage capacity of the batteries during charging and discharging. And this difference will continue to accumulate under repeated cycles of charging and discharging, resulting in a decrease in the storage capacity of the entire set of series-connected lithium batteries as the number of uses increases. The present invention aims at this problem by as figure 1 The shown circuit device 1 capable of detecting voltage / balanced voltage / controlling current performs...

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Abstract

This invention provides one lithium battery balance and charging method, which comprises the following steps: monitoring series each lithium battery level or electricity difference; when any two lithium battery levels or volumes exceed certain value adopting series lithium battery simultaneous minimum level to make each battery volume zero; then continuing series charging to make each lithium battery achieve even charging status.

Description

technical field [0001] The present invention relates to a lithium battery power balance and charging method, in particular to a charging method using the lowest point voltage volts as a balance reference level to obtain the most uniform charging state of serially connected lithium batteries. Background technique [0002] Various portable products such as portable TVs, electric tools, photographic equipment, portable personal computers, etc. are born with the progress of human electronic technology, and power batteries are the only source of kinetic energy for many electric products, so the power battery Size, weight, lifespan and safety conditions play a decisive role in the performance of electric products. [0003] Lithium batteries have the advantages of small size, light weight and almost 100% charge / discharge feedback. Therefore, lithium batteries connected in series will become new power batteries. However, when the lithium battery core is overcharged, lithium metal wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44
CPCY02E60/12Y02E60/10
Inventor 程敬义吴伟臣张振铭
Owner AMITA TECH
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