Calculation method for reducing capacity loss rate in energy storage scene

A calculation method and scenario technology, applied in the field of energy storage systems, can solve problems such as life loss, capacity loss, internal resistance loss, etc.

Active Publication Date: 2021-09-14
万克能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If inconsistent batteries are used in series, problems such as capacity loss, life loss, and internal resistance loss will occur

Method used

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  • Calculation method for reducing capacity loss rate in energy storage scene
  • Calculation method for reducing capacity loss rate in energy storage scene
  • Calculation method for reducing capacity loss rate in energy storage scene

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0072] Initial capacity matrix of each battery pack:

[0073]

[0074] Battery pack number matrix for each battery pack:

[0075]

[0076] The first round of traversal

[0077] 1.1

[0078] Find the highest capacity increase from two combinations

[0079] The No. 6 battery pack of battery pack 2 is exchanged with the No. 5 battery pack of battery pack 1, and the capacity of battery pack 2 is increased by:

[0080] Δc 2 =4*5-2*5=10;

[0081] Capacity increase of battery 1:

[0082] Δc 1 =2*5-2*5=0;

[0083] The overall capacity increase is:

[0084] Δc 21 =Δc 2 -Δc 1 =10-0=10;

[0085] It is found that the No. 11 battery pack of battery pack 3 is exchanged with the No. 5 battery pack of battery pack 1, and the overall capacity is also increased by 10.

[0086] 1.2 Calculate the standard deviation reduction of the two combinations

[0087] Standard deviation reduction for packs 2 and 1:

[0088] Δs 21 =(s 2 -s' 2 )+(s 1 -s' 1 )=(1.28-0.88)+(1.2-1.04)=0....

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Abstract

The invention provides a calculation method for reducing the capacity loss rate in the energy storage scene. The capacity loss rate can be effectively reduced by replacing the battery and reassembling the battery, and the overall battery use capacity is improved. According to the method, after the number of replaced new batteries and the number of replaced battery modules are determined, the maximum capacity to be improved can be rapidly calculated, and an optimal solution is provided, including which battery modules need to be replaced by the new battery modules, which battery modules need to be subjected to position replacement, and the capacity consistency of different battery packs is improved.

Description

technical field [0001] The invention belongs to the technical field of energy storage systems, and in particular relates to a calculation method for reducing a loss tolerance rate in an energy storage scenario. Background technique [0002] In large-scale energy storage application scenarios, since the characteristics of different batteries will not be completely consistent, as the battery operating time increases, there will be inconsistencies in the capacity, voltage, internal resistance, etc. of different batteries. If inconsistent batteries are used in series, problems such as capacity loss, life loss, and internal resistance loss will occur. Contents of the invention [0003] The present invention aims to solve the above technical problems, and provides a calculation method for reducing the loss tolerance rate in an energy storage scenario. [0004] The single cells form a battery pack, and the capacity conforms to the "barrel principle". The capacity of the worst ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/396G06F17/16
CPCG01R31/396G06F17/16Y02E60/10
Inventor 祁建程楼旸董远云
Owner 万克能源科技有限公司
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