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Method for multi-stage rechargeable battery module

A technology of battery module and rechargeable battery, 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 reduced battery life, long time consumption, and non-charging methods, etc. , to achieve the effect of avoiding safety and improving life

Active Publication Date: 2011-12-07
COMPAL ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method can avoid overcharging of a single cell parallel group, it takes a long time to fully charge the battery module by intermittently supplying power, and frequent charging and discharging of the battery will also damage the battery life, still not the best way to charge

Method used

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  • Method for multi-stage rechargeable battery module
  • Method for multi-stage rechargeable battery module
  • Method for multi-stage rechargeable battery module

Examples

Experimental program
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Effect test

no. 1 example

[0061] When the voltage value of the battery module is close to its rated voltage value, its chargeable position (hole) has been greatly reduced. At this time, if it is still charged with a high current, it may affect the safety of the battery module. Accordingly, in one embodiment of the present invention, when the voltage of one of the battery cell parallel groups of the battery module reaches the maximum voltage that it can withstand for safe operation, the charging current provided to the battery cell parallel group is reduced by a certain range. , to maintain the safety of the battery module.

[0062] Figure 4 It is a flow chart of the method of the multi-stage rechargeable battery module according to the first embodiment of the present invention. Please refer to Figure 4 , this embodiment is to charge a battery module with multiple battery cell parallel groups by controlling the charging current, wherein, for example, one or more battery cells (cells) are connected i...

no. 2 example

[0075] In addition to the above method of "controlling the current" to charge the battery module, the present invention also includes the method of "controlling the voltage" to charge the battery module. An example will be given below to describe in detail.

[0076] Figure 7 It is a flow chart of the method of the multi-stage rechargeable battery module according to the second embodiment of the present invention. Please refer to Figure 7 , this embodiment is to charge a battery module with multiple battery cell parallel groups by controlling the "charging voltage", and when the voltage of one of the battery cell parallel group groups of the battery module reaches its safe operation When the voltage is at the maximum value, the charging current supplied to the battery module is reduced by a certain range to maintain the safety of the battery.

[0077] Figure 8 is a charging curve diagram of the battery module according to the second embodiment of the present invention. P...

no. 3 example

[0088] In the first two embodiments, when the voltage of the battery cell parallel group reaches the rated voltage, the charging current value is greatly reduced to ensure the safety of the battery module. Compared with this, this embodiment shifts the time point of "significantly reducing the charging current value" backward, which means that when the voltage of the battery cell parallel group reaches the rated voltage, the rated voltage is first used for constant voltage charging. When the charging current value gradually drops to a lower charging current value, the charging current is greatly reduced to speed up the charging speed of the battery module.

[0089] Figure 10 It is a flow chart of the method of the multi-stage rechargeable battery module according to the third embodiment of the present invention. Figure 11 is a charging curve diagram of the battery module according to the third embodiment of the present invention. Please also refer to Figure 10 and Figu...

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Abstract

The invention relates to a method for charging a multi-section rechargeable battery module suitable for a battery module comprising a plurality of battery core parallel sets. The invention adopts voltage control or current control, maintains constant current charging at the beginning of the charging of the battery module, and greatly reduces the charging current to slow down the charging when the voltage of one battery core parallel set of the battery module reaches the safe value thereof or when the total voltage of the battery module reaches rated voltage, thus ensuring the safety of the battery and prolonging the service life of the battery.

Description

technical field [0001] The invention relates to a charging method, and in particular to a charging method using multi-stage charging for an intelligent battery module. Background technique [0002] With the higher and higher performance of processors, the increasing number of applications, and the more advanced graphics functions, the power requirements of portable computers are gradually increasing. Usually, a series connection method is used to assemble a plurality of battery cells in parallel into a battery module, so as to gather enough power for the portable computer to use. [0003] Compared with the improvement of battery capacity, how to charge it quickly and safely is also an important issue faced by manufacturers. Due to the special design of the battery module, different power changes will be generated at different time points or under different charging environments. Therefore, many corresponding charging methods have also been developed for these characteristic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/44H02J7/00
CPCY02E60/12Y02E60/10
Inventor 龚绍祖陈佳昌庄志堂
Owner COMPAL ELECTRONICS INC