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High-capacity battery module with small-capacity battery cells in double parallel connection and recycling method of high-capacity battery module

A battery module, small-capacity technology, applied in battery recycling, recycling technology, battery pack components, etc., can solve the problems of single cell capacity, excessive volume and weight, and few cascade utilization scenarios.

Pending Publication Date: 2021-07-06
MIRATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large capacity, volume, and weight of the battery cells used in electric vehicles, which exceed the actual needs of forklifts, low-speed electric vehicles, and backup power sources, there are not many usage scenarios for this echelon.

Method used

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  • High-capacity battery module with small-capacity battery cells in double parallel connection and recycling method of high-capacity battery module
  • High-capacity battery module with small-capacity battery cells in double parallel connection and recycling method of high-capacity battery module
  • High-capacity battery module with small-capacity battery cells in double parallel connection and recycling method of high-capacity battery module

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Experimental program
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Embodiment 1

[0039] The purpose of the present invention is to design a detachable battery module structure for electric vehicles, the capacity of which is usually large, and when the battery is retired, the battery module structure can be disassembled into several small-capacity cells , and cascade utilization is used in scenarios with smaller capacity requirements, so as to fully exploit the utilization value of batteries. The specific plans are as follows:

[0040] see Figures 1 to 3As shown in the figure, the present invention provides a high-capacity battery module with double-parallel small-capacity cells, including a first-level parallel cell 20 and a second-level parallel cell 30 obtained by connecting a plurality of the first-level parallel cells 20 in parallel. ; The first-level parallel cell 20 includes several small-capacity cells 10 connected in parallel.

[0041] In this way, the total capacity of the high-capacity battery module is the sum of the capacities of several par...

Embodiment 2

[0052] see Figure 8-12 As shown, a high-capacity battery module with double-parallel small-capacity cells is different from Embodiment 1 in that each small-capacity cell in the first-level parallel cells 20 has a hollow structure. The cell is mainly composed of a cell body 10' and a hollow structure 20' in the cell body 10'. Several cells with hollow structures are arranged in the form of concentric circles and then connected in parallel. E.g Figure 10 Sub-cell 1 101 ′, sub-cell 2 102 ′ and sub-cell 3 103 ′ have the same central axis of symmetry. This arrangement can realize the close arrangement of multiple groups of cells, the space layout is more reasonable, and the heat dissipation effect is also better. .

[0053] In some embodiments, a hollow structure is provided between two adjacent large-diameter hollow structure cells, and a heat dissipation device or a heat insulating material may be arranged inside the hollow structure to form a heat insulating layer 60 ′ and ...

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Abstract

The invention provides a high-capacity battery module with small-capacity battery cells in double parallel connection and a recycling method of the high-capacity battery module. The high-capacity battery module comprises a first-stage parallel battery cell and a second-stage parallel battery cell which is obtained by connecting a plurality of first-stage parallel battery cells in parallel, wherein the first-stage parallel battery cell comprises a plurality of small-capacity battery cells which are connected in parallel. According to the arrangement, when the high-capacity battery module is decommissioned, the two-stage parallel battery cells are split and can be secondarily applied to the field of power supply of corresponding power batteries with small-capacity requirements; and the first-stage parallel battery cell is further split, so that the battery cell can be secondarily applied to the power supply field of corresponding power batteries with lower capacity requirements. Through concentric circle type parallel connection of the hollow-structure battery cells, the internal resistance of the battery cells can be reduced, the heat dissipation effect is improved, and the space layout is more reasonable. According to the invention, the echelon utilization scene of the small-capacity battery cell is expanded, the capacity stability of the battery is improved, the battery monitoring difficulty is reduced, and the utilization value of the battery is fully excavated.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a high-capacity battery module with double-parallel connection of small-capacity cells and a recycling method thereof. Background technique [0002] With the gradual increase in the cruising range requirements of new energy electric vehicles, the energy density requirements for batteries are gradually increasing. In order to achieve higher energy density, electric vehicles need to use cells with larger single capacity. Due to national regulations, when the rechargeable and discharge capacity of the vehicle power battery is less than or equal to 80% of the initial capacity, it needs to be retired. For the retired power battery itself, 80% of its remaining rechargeable and discharge capacity still has great use value, and can continue to be used in other fields such as forklifts, low-speed electric vehicles, and backup power sources that do not require high rechargeable and disch...

Claims

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Application Information

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IPC IPC(8): H01M50/249H01M50/258H01M50/512H01M50/509H01M10/54H01M10/42
CPCH01M10/54H01M10/4207Y02W30/84Y02E60/10
Inventor 不公告发明人
Owner MIRATTERY CO LTD
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