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A cascade utilization method of power lithium battery

A lithium battery and power technology, which is applied in the detection field, can solve problems such as waste of effective batteries, unstable battery output voltage, and lower utilization rate of cascades, so as to achieve the effect of improving efficiency and stability

Active Publication Date: 2019-05-31
SHANGHAI PYLON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the cascade utilization of power lithium batteries, there are two traditional processing methods. One is direct use, ignoring the cells that have already failed in the battery and directly applying them to other fields. Under this processing method, effective cells and invalid cells Cells are used together, which indirectly affects the efficiency of effective cells, and the output voltage of the battery is unstable
The other is the overall elimination and use, that is, after the battery pack is disassembled, each battery is measured, and the unqualified batteries are eliminated as a whole. This operation will waste the effective cells in the battery and reduce the cascade utilization. Utilization

Method used

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  • A cascade utilization method of power lithium battery
  • A cascade utilization method of power lithium battery
  • A cascade utilization method of power lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Based on the elaboration in the background technology, aiming at the defects of cascaded utilization in the prior art, the present invention provides a cascaded utilization method of a power lithium battery.

[0035] Such as figure 1 As shown, on the one hand, a cascade utilization method of a power lithium battery, wherein; including,

[0036] Step S110, obtaining the reusability index of each battery cell in the power lithium battery.

[0037] The reusability index can be obtained through historical characteristic analysis, basic characteristic test analysis and accelerated aging test analysis. The historical characteristic analysis focuses on the analysis of the appearance change, internal resistance change, available capacity and energy, and energy retention capacity of each battery cell. , for zero-voltage cells, cells with excessive resistance, and power cells with seriously poor appearance, the possibility of cascade utilization is directly ruled out; the histor...

Embodiment approach

[0050]List a specific implementation, such as figure 2 As shown, the power lithium battery includes 9 battery cells 1, and the 9 battery cells are sequentially fixed in the frame 2 of the power lithium battery, and each battery cell 1 is provided with a plurality of conductor connectors 3.

[0051] First judge and obtain the reusability index of the 9 battery cells 1 in the power lithium battery, judge the number of reusable battery cells 1 in the power lithium battery according to the usable index; When the number of 1 is not less than 6, continue to judge whether the number of non-reusable battery cells 1 is an even number.

[0052] Assuming that the number of unusable cells 1 is even and 2, then choose image 3 The cross-connection device shown crosses the non-reusable battery cell through the cross-connection rod 41 of the cross-connection device, and at the same time connects a conductor connector 3 of a reusable battery cell 1 across the first connector 421 1. Cross t...

Embodiment 2

[0057] In the above-mentioned first embodiment, the reusable battery cells are connected across the connecting device or the vertical connecting device to short-circuit the non-reusable cells to form a reusable power lithium battery, but the connecting devices are all connected externally. Compared with the internal connection, the stability of the connection is lacking, especially when the reusable power lithium battery is used in a mobile environment, it is easy to cause the connection between the connection device and the battery cell to be unstable. For this reason, such as Figure 6 As shown, the present invention once again provides a cascaded utilization method of a power lithium battery, specifically, including,

[0058] Step S210, obtaining the reusability index of each battery cell in the power lithium battery;

[0059] Step S220, judging the number of reusable cells in the power lithium battery according to the usability index;

[0060] Step S2301, when the number ...

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Abstract

The invention relates to a cascade utilization method of a power lithium battery, comprising: obtaining the reusability index of each battery cell in the power lithium battery; judging the reusable battery cells in the power lithium battery according to the reusable index Quantity; When the number of reusable batteries is not less than N, connect the reusable batteries through a connecting device to short-circuit the non-reusable batteries to form a reusable power lithium battery. In the present invention, first from the power Obtain reusable batteries from lithium batteries, and short-circuit the non-reusable batteries through the connecting device. On the one hand, it improves the output voltage stability of the power lithium battery, and on the other hand, it also improves the efficiency of the cascade utilization of the power lithium battery. ,Energy saving and environmental protection.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a step-by-step utilization method of a power lithium battery. Background technique [0002] The cascading utilization of power lithium batteries means that when the capacity of power lithium batteries cannot meet the continued use of electric vehicles after one year of use, the battery packs are disassembled into batteries or even batteries, which can be classified according to level according to the eliminated ones. It is used in communication power supply, solar street lamps, and energy storage fields so that the power lithium battery can continue to exert waste heat to improve energy utilization efficiency. [0003] In the cascade utilization of power lithium batteries, there are two traditional processing methods. One is direct use, ignoring the cells that have already failed in the battery and directly applying them to other fields. Under this processing method, effective ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/54
CPCH01M10/4207H01M10/54Y02E60/10Y02W30/84
Inventor 陈佰爽施璐李番军
Owner SHANGHAI PYLON TECH CO LTD
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