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Lithium battery grouping method, battery pack and electronic product

A technology for lithium batteries and battery packs, applied in lithium batteries, final product manufacturing, non-aqueous electrolyte batteries, etc. The effect of density

Pending Publication Date: 2022-03-01
HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing series-parallel cells do not match the size. In order to ensure that the pack size will not exceed the specification under any circumstances, the pack end will give the maximum size of a single cell, and the single cell cannot If this size is exceeded, the size of the pack will not be fully utilized, which will reduce the energy density of the single cell

Method used

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  • Lithium battery grouping method, battery pack and electronic product

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Experimental program
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Effect test

Embodiment 1

[0036] In this embodiment, the orderly arranged N*M batteries are divided into two groups according to the average size of the increased single batteries, and the batteries of the two groups are matched with each other; by dividing the N*M batteries Divided into two groups, the cells of the two groups are matched with each other to effectively increase the size of the cells after grouping, thereby increasing the energy density of the cells after grouping.

Embodiment 2

[0038] The difference from Embodiment 1 is that in this embodiment, the orderly arranged N*M cells are sequentially divided into the first group, the second group, and the third group according to the average size of the increased single cells. The cells in the first group are grouped with the cells in the third group, and the cells in the second group are grouped within the group; by dividing N*M cells into the first group and the second group in turn , The third group, the batteries in the first group are combined with the third group, and the batteries in the second group are grouped within the group, which effectively improves the grouping effect of the batteries and increases the size of the cells after grouping , so as to increase the energy density of the cells after assembly.

[0039] In this embodiment, the maximum specification size of the single cell is a, the boundary line between the first group and the second group is X1=a, and the boundary line between the secon...

Embodiment 3

[0041] The difference from Embodiment 2 is that the second group can be equally divided into front and rear areas, and the cells in the front area are matched with the cells in the rear area; by dividing the second group into two areas on average, the front area The battery cells in the rear area are grouped together, effectively dividing the N*M cells arranged in an orderly manner into four groups, refining the grouping of the battery cells, and improving the effect of the battery cell grouping, thereby improving the battery life. The energy density of the core after assembly.

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Abstract

The invention discloses a lithium battery matching method, a battery pack and an electronic product, the lithium battery matching method comprises the following steps: step 1, taking a batch of qualified cells, the number of the cells being N * M, N being the number of the cells connected in series, and M being the number of the cells connected in parallel; 2, the size of each battery cell is determined, and N * M battery cells are arranged in order according to the size of each battery cell; 3, increasing the average size of the single battery cells in matching, grouping N * M orderly arranged battery cells into at least two groups according to the average size of the increased single battery cells, and matching the group with the high battery cell size value and the group with the low battery cell size value to form M groups in total; and the sizes of the single battery cells are effectively matched, so that the energy density after the battery cells are matched is improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium battery assembly method, a battery pack and electronic products. Background technique [0002] The current prismatic lithium battery pack adopts parallel connection and series connection respectively to increase capacity and voltage. The usual method is to group the batteries first, connect the batteries in each group in parallel, and connect the groups in series. [0003] The requirement for group matching is that the capacity and difference between groups should be as small as possible, so group matching is a heavy workload and difficult process in the battery pack, and the result of group matching is related to the cruising range and life of the battery pack. [0004] The existing series-parallel cells do not match the size. In order to ensure that the pack size will not exceed the specification under any circumstances, the pack end will give the maximum si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/052
CPCH01M10/058H01M10/052Y02E60/10Y02P70/50
Inventor 汪勇胡本安李思陈杰项海标杨山
Owner HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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