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Battery pack operation method

A method of operation and technology of battery packs, applied in secondary batteries, secondary battery charging/discharging, secondary battery repair/maintenance, etc., can solve the problem that battery cells have not yet reached saturation, battery cell characteristics are different, and battery cell differences are exacerbated. problems, to achieve the effect of improving service life, good performance consistency, and preventing excessive temperature

Inactive Publication Date: 2018-02-16
青岛恒金源电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using a battery pack of battery cells connected in series, there will be such a problem: when charging, even if some battery cells are overcharged in the same battery pack, there are still some battery cells that have not yet reached saturation; In the battery pack, some battery cells have not been fully discharged, but some battery cells are still over-discharged
In addition, if a battery cell is over-discharged / charged for a long period of time, significant deterioration may occur in the material constituting the battery cell, so that the characteristics of the battery cell become different, and this deterioration is one of the reasons for exacerbating the variation between battery cells

Method used

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Effect test

Embodiment 1

[0028] 1), detecting the voltage of each battery in the battery pack, when detecting that the voltage of the single battery is lower than 90% of the average value of the batteries in the battery pack, isolating the single battery from the battery pack;

[0029] 2) Implement an activation procedure on the single battery, and heat the battery to be activated to 45°C;

[0030] a) Discharge the battery to be activated to a cut-off voltage of 2.7V;

[0031] b) Activate by positive / negative alternating pulse current, the positive pulse current is 0.1C, the pulse time is 10s, the negative pulse current is 0.1C, the pulse time is 10s, and the interval between positive and negative pulse currents 5s, the activation time is 3h;

[0032] c), charging the battery at 2C for 5min, then charging at 0.1C for 2h, alternately charging to a cut-off voltage of 4.2V;

[0033] d) Activate by positive / negative alternating pulse current, the positive pulse current is 0.1C, the pulse time is 10s, th...

Embodiment 2

[0037] 1) Detect the voltage of each battery in the battery pack, and when it is detected that the voltage of the single battery is lower than 85% of the average value of the batteries in the battery pack, the single battery is isolated from the battery pack;

[0038] 2) Implement an activation procedure on the single battery, and heat the battery to be activated to 55°C;

[0039] a) Discharge the battery to be activated to a cut-off voltage of 2.7V;

[0040] b) Activate by positive / negative alternating pulse current, the positive pulse current is 0.5C, the pulse time is 1s, the negative pulse current is 0.5C, the pulse time is 1s, and the interval between positive and negative pulse currents 10s, the activation time is 1h;

[0041] c), charging the battery at 5C for 1min, then charging at 0.2C for 0.1h, alternately charging to a cut-off voltage of 4.2V;

[0042] d) Activate by positive / negative alternating pulse current, the positive pulse current is 0.5C, the pulse time is...

Embodiment 3

[0046] 1), detecting the voltage of each battery in the battery pack, when it is detected that the voltage of the single battery is lower than 80% of the average value of the batteries in the battery pack, the single battery is isolated from the battery pack;

[0047] 2) Implement an activation procedure on the single battery, and heat the battery to be activated to 50°C;

[0048] a) Discharge the battery to be activated to a cut-off voltage of 2.7V;

[0049] b) Activate by positive / negative alternating pulse current, the positive pulse current is 0.3C, the pulse time is 5s, the negative pulse current is 0.4C, the pulse time is 5s, and the interval between positive and negative pulse currents 5s, the activation time is 2h;

[0050] c), charging the battery at 3C for 4min, then charging at 0.1C for 1h, alternately charging to a cut-off voltage of 4.2V;

[0051] d), using positive / negative alternating pulse current for activation, the positive pulse current is 0.3C, the pulse ...

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Abstract

The invention provides a battery pack operation method. A battery which has a relatively poor operation condition in a battery pack is isolated and activated, so that the batteries in the battery packcan be maintained at a relatively high operation state; and therefore, the service life of the battery pack can be prolonged, and uniformity among the batteries in the battery pack is improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for operating a battery pack. Background technique [0002] The current battery technology is far behind the development of other fields in the electronics industry. Therefore, when using battery products, it needs to be controlled by a battery management system to prolong the service life of battery products. When using a battery pack of battery cells connected in series, there will be such a problem: when charging, even if some battery cells are overcharged in the same battery pack, there are still some battery cells that have not yet reached saturation; In the battery pack, some battery cells have not been fully discharged, but some battery cells are still over-discharged. In addition, if a battery cell is over-discharged / charged for a long period of time, significant deterioration may occur in the material constituting the battery cell, so that the characteristics...

Claims

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Application Information

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IPC IPC(8): H01M10/42H01M10/44
CPCH01M10/4207H01M10/4242H01M10/44H01M10/441Y02E60/10
Inventor 不公告发明人
Owner 青岛恒金源电子科技有限公司
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