Module battery pack

Abstract

The utility model relates to a module battery pack in the technical field of battery modules, which comprises a shell, a cover plate and a plurality of battery cells arranged in the shell, a battery cell support is arranged among the plurality of battery cells, a plurality of mounting holes for placing the battery cells are arranged in the middle of the battery cell support, and positioning rings are arranged in the mounting holes. The positioning ring is arranged in the middle of the battery cell bracket in a sleeving manner, a connecting rib is arranged between the positioning ring and the mounting hole, the positioning ring is fixedly connected with the mounting hole through the connecting rib, and a clearance is reserved between the positioning ring and the mounting hole, so that when a single battery cell expands, the positioning ring can be extruded outwards; the positioning ring approaches the inner wall of the mounting hole through the clearance, and the clearance can effectively prevent the expansion battery cell from pressing the surrounding batteries, so that the battery cell in the module battery pack is effectively protected.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, and particularly relates to a modular battery pack. Background Art

[0002] A modular battery pack generally refers to a combined battery, mainly referring to the processing and assembly of a lithium battery pack. It combines battery cells, a battery protection board, battery connection pieces, a battery cell bracket, etc. through the battery PACK process to process into a product required by customers. Customers can customize the structure size of the battery cell bracket and the distribution shape of the battery cells according to the shape of their products, and its degree of customization is high.

[0003] According to the Chinese invention application with the existing publication number CN114122593A, a battery pack and its battery cell connection piece are disclosed. The battery pack includes: a housing; a battery cell group, accommodated in the housing and used to supply power to an electric tool; a bracket, used to fix the battery cell group; a battery cell connection piece, connected to the power supply output terminal of the battery cell group; a battery pack output terminal, connected to the battery cell connection piece and used to supply power to the input terminal of the electric tool; defining the plane where the battery pack output terminal is located as the upper surface, the plane where the power supply output terminal of the battery cell group is located as the front surface, and the surface perpendicular to the upper surface and the front surface as the side surface; wherein, the battery cell connection piece includes: a bracket fixing surface, fixed on the bracket and parallel to the side surface; a battery cell connection surface, connected to the power supply output terminal of the battery cell group and parallel to the front surface; a power supply output surface, connected to the battery pack output terminal and parallel to the upper surface; wherein, the bracket fixing surface is connected to the battery cell connection surface, and the power supply output terminal is connected to the bracket fixing surface and / or the battery cell connection surface. By adopting the present invention, the battery pack can meet a higher charge and discharge current.

[0004] However, for the existing modular battery pack, under long-term high charge and discharge current, the battery cells are prone to expansion in the follow-up, which is a common problem of lithium batteries. After a single battery cell expands, the existing battery cell bracket cannot reserve a clearance space for the expanded battery cell, easily causing the space inside the modular battery pack to be squeezed and damaging other battery cells. Therefore, in view of these current situations, there is an urgent need to develop a modular battery pack to meet the actual use requirements. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a modular battery pack, which is used to solve the technical problem that the existing battery cell bracket cannot reserve a clearance space for the expanded battery cell, easily causing the space inside the modular battery pack to be squeezed and damaging other battery cells.

[0006] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0007] A modular battery pack includes a housing, a cover plate, and a plurality of battery cells disposed inside the housing. There is a battery cell support between the plurality of battery cells. A plurality of mounting holes for placing the battery cells are formed in the middle of the battery cell support. A positioning ring is disposed inside the mounting hole. The positioning ring is sleeved on the middle of the battery cell support. A connecting rib is disposed between the positioning ring and the mounting hole. The positioning ring is fixedly connected to the mounting hole through the connecting rib, and a clearance space is left between the positioning ring and the mounting hole.

[0008] In the above description, as a further solution, both ends of the connecting rib are beveled portions, and the middle of the connecting rib is a deformation portion. The side walls of the beveled portions are inclined inwardly towards the deformation portion. Both ends of the connecting rib are fixedly connected to the inner wall of the mounting hole and the positioning ring respectively through the beveled portions.

[0009] In the above description, as a further solution, the battery cell is of a cylindrical structure, and both the mounting hole and the positioning ring are consistent with the structure of the battery cell.

[0010] In the above description, as a further solution, a plurality of connecting ribs are provided, and the plurality of connecting ribs are respectively arranged in a circumferential array centered on the positioning ring.

[0011] In the above description, as a further solution, the battery cell support is composed of a plurality of mounting plate bodies and a plurality of connecting column bodies. The mounting holes and the positioning rings are both disposed in the middle of the mounting plate bodies. The plurality of mounting plate bodies are distributed in a structure of stacking up and down, and the plurality of connecting column bodies are respectively disposed at the edges of the mounting plate bodies. The plurality of mounting plate bodies are connected through the connecting column bodies.

[0012] In the above description, as a further solution, the inside of the housing is an inner cavity. The plurality of battery cells are respectively inserted into the corresponding mounting holes inside the battery cell support, and the plurality of battery cells are stacked in the inner cavity through the battery cell support.

[0013] In the above description, as a further solution, a positive electrode column and a negative electrode column that protrude upward are provided on the top of the cover plate. A current collecting end plate is disposed between the battery cell support and the cover plate. One end surface of the current collecting end plate is electrically connected to the battery cell, and the other end surface of the current collecting end plate is respectively electrically connected to the positive electrode column and the negative electrode column.

[0014] The beneficial effects produced by the present utility model are as follows:

[0015] For a modular battery pack of the present application, since a positioning ring is disposed inside the mounting hole, and a connecting rib is disposed between the positioning ring and the mounting hole, when a single battery cell expands, the positioning ring can be extruded outward. The positioning ring approaches the inner wall of the mounting hole through the clearance space. The clearance space can effectively prevent the expanded battery cell from pressing against the surrounding batteries, and effectively protect the battery cells inside the modular battery pack. Description of the Drawings

[0016] Figure 1 Schematic three - dimensional structure diagram of a module battery pack according to the present utility model;

[0017] Figure 2 Schematic structure diagram of a middle mounting plate body of a module battery pack according to the present utility model;

[0018] Figure 3 is Figure 2 Partial enlarged structure diagram of A in;

[0019] Figure 4 Schematic internal structure diagram of a module battery pack according to the present utility model;

[0020] In the figure: 1 - battery cell, 2 - cover plate, 21 - positive terminal, 22 - negative terminal, 3 - battery cell bracket, 31 - mounting plate body, 32 - connecting column body, 33 - locking nut, 4 - outer shell, 41 - inner cavity, 311 - mounting hole, 312 - positioning ring, 313 - connecting rib, 314 - clearance space, 3131 - inclined platform part, 3132 - deformation part. Specific embodiments

[0021] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the embodiments does not limit the present utility model. The present utility model will be described in detail below with reference to the accompanying drawings.

[0022] Please refer to Figures 1-4 , a specific embodiment of a module battery pack thereof includes an outer shell 4, a cover plate 2, and a plurality of battery cells 1 arranged inside the outer shell 4. There is a battery cell bracket 3 between the plurality of battery cells 1. The inside of the outer shell 4 is an inner cavity 41. The plurality of battery cells 1 are respectively inserted into the corresponding mounting holes 311 inside the battery cell bracket 3, and the plurality of battery cells 1 are stacked inside the inner cavity 41 through the battery cell bracket 3. A plurality of mounting holes 311 for placing the battery cells 1 are provided in the middle of the battery cell bracket 3. A positioning ring 312 is provided inside the mounting hole 311. The positioning ring 312 is sleeved in the middle of the battery cell bracket 3. A connecting rib 313 is provided between the positioning ring 312 and the mounting hole 311. The positioning ring 312 is fixedly connected to the mounting hole 311 through the connecting rib 313, and a clearance space 314 is left between the positioning ring 312 and the mounting hole 311. The battery cell 1 is of a cylindrical structure, and both the mounting hole 311 and the positioning ring 312 are consistent with the structure of the battery cell 1.

[0023] Inside the installation hole 311, there is a positioning ring 312, and there are connecting ribs 313 between the positioning ring 312 and the installation hole 311. When a single battery cell 1 expands, it can extrude the positioning ring 312 outwards. The positioning ring 312 approaches the inner wall of the installation hole 311 through the avoidance gap 314. The avoidance gap 314 can effectively prevent the expanded battery cell 1 from pressing on the surrounding batteries, and effectively protect the battery cells 1 inside the module battery pack.

[0024] Preferably, as Figures 2-3 shown, both ends of the connecting rib 313 are inclined platform parts 3131, and the middle part of the connecting rib 313 is a deformation part 3132. The side walls of the inclined platform parts 3131 are inclined inwards towards the deformation part 3132. Both ends of the connecting rib 313 are fixedly connected to the inner wall of the installation hole 311 and the positioning ring 312 respectively through the inclined platform parts 3131. There are several connecting ribs 313, and several connecting ribs 313 are arranged in a circumferential array around the positioning ring 312 as the center.

[0025] When the battery cell 1 expands, it is necessary to extrude the positioning ring 312 outwards. At this time, the inclined platform parts 3131 at both ends of the connecting rib 313 can apply force to the deformation part 3132 with relatively weak structural strength, causing it to deform. At the same time, due to the reduction of the deformation part 3132, the positioning ring 312 can approach the inner wall of the installation hole 311 along the avoidance gap 314, preventing the battery cell 1 from squeezing adjacent battery cells 1. At the same time, it is convenient for maintenance personnel to determine the location of the expanded and damaged battery cell 1 by observing whether the deformation part 3132 deforms during disassembly and inspection.

[0026] The preferred structure of the battery cell bracket 3 is as Figure 1 shown. The battery cell bracket 3 is composed of several mounting plate bodies 31 and several connecting column bodies 32. The installation holes 311 and the positioning rings 312 are both arranged in the middle of the mounting plate bodies 31. Several mounting plate bodies 31 are distributed in a stacked structure up and down, and several connecting column bodies 32 are respectively arranged at the edges of the mounting plate bodies 31. Several mounting plate bodies 31 are connected by the connecting column bodies 32.

[0027] As a further solution, on the top of the cover plate 2, there are upwardly protruding positive electrode posts 21 and negative electrode posts 22. There is a bus bar end piece (not shown) between the battery cell bracket 3 and the cover plate 2. One end face of the bus bar end piece (not shown) is electrically connected to the battery cell 1, and the other end face of the bus bar end piece (not shown) is respectively electrically connected to the positive electrode post 21 and the negative electrode post 22.

[0028] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model is disclosed above in the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art, without departing from the scope of the technical solution of the present utility model, when making some changes or modifications using the above-disclosed technical content to equivalent embodiments of equivalent changes, but as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the present utility model all fall within the scope of the technical solution of the present utility model.

Claims

1. A modular battery pack, comprising a housing, a cover plate, and a plurality of battery cells disposed inside the housing, wherein a battery cell support is provided between the plurality of battery cells, and is characterized in that: A plurality of mounting holes for placing the battery cells are formed in the middle of the battery cell support. A positioning ring is provided inside the mounting hole. The positioning ring is sleeved on the middle of the battery cell support. A connecting rib is provided between the positioning ring and the mounting hole. The positioning ring is fixedly connected to the mounting hole through the connecting rib, and a clearance space is left between the positioning ring and the mounting hole.

2. The module battery pack according to claim 1, wherein: Both ends of the connecting rib are beveled portions, and the middle of the connecting rib is a deformed portion. The side wall of the beveled portion is inclined inwardly towards the deformed portion. Both ends of the connecting rib are fixedly connected to the inner wall of the mounting hole and the positioning ring respectively through the beveled portions.

3. A modular battery pack according to claim 1, characterized in that: The battery cell has a cylindrical structure, and both the mounting hole and the positioning ring are consistent with the structure of the battery cell.

4. The modular battery pack according to claim 3, wherein: A plurality of the connecting ribs are provided, and the plurality of connecting ribs are respectively arranged in a circumferential array around the positioning ring as the center.

5. A modular battery pack according to claim 4, characterized in that: The battery cell support is composed of a plurality of mounting plate bodies and a plurality of connecting column bodies. The mounting holes and the positioning rings are both arranged in the middle of the mounting plate bodies. The plurality of mounting plate bodies are distributed in a stacked structure up and down, and the plurality of connecting column bodies are respectively arranged at the edges of the mounting plate bodies. The plurality of mounting plate bodies are connected through the connecting column bodies.

6. A modular battery pack according to any one of claims 1-5, characterized in that: The interior of the outer shell is an inner cavity. A plurality of battery cells are respectively inserted into the corresponding mounting holes inside the battery cell support, and the plurality of battery cells are stacked inside the inner cavity through the battery cell support.

7. A modular battery pack according to claim 6, characterized in that: Positive and negative terminals protruding upward are provided on the top of the cover plate. A busbar end plate is provided between the battery cell support and the cover plate. One end surface of the busbar end plate is electrically connected to the battery cell, and the other end surface of the busbar end plate is respectively electrically connected to the positive and negative terminals.

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