Cylindrical battery cell Pack structure

Abstract

The utility model relates to the technical field of cylindrical Pack series-parallel connection structures, and discloses a cylindrical battery cell Pack structure which comprises three groups of battery pack structure main bodies, a plurality of reserved pressure relief holes are formed in the positions, close to the edges, of the tops of the three groups of battery pack structure main bodies at equal intervals in the circumferential direction, and the reserved pressure relief holes are communicated with the battery pack structure main bodies. Battery pressure release valves are arranged at the positions, close to the centers, of the tops of the three battery pack structure main bodies, welding center pieces fixedly sleeve the positive electrode centers of the three battery pack structure main bodies, and a plurality of battery cell positive electrode welding surface supporting angle blocks are fixedly connected to the outer surfaces of the three welding center pieces at equal intervals in the circumferential direction; according to the utility model, the problems that a cylindrical battery cell and a pressure release valve in the existing market are arranged below a battery cell positive electrode welding sheet, the battery cell pressure release valve can be shielded by using a conventional nickel sheet, the gas release of the battery cell is blocked in an emergency, and safety accidents are caused are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cylindrical Pack series parallel structure technical field, concretely is a kind of cylindrical battery cell Pack structure. BACKGROUND

[0002] With the development of new energy vehicles, the safety requirements for lithium battery packs are becoming higher and higher, and the requirements for cylindrical battery cell Pack structure are also becoming higher and higher. Currently, conventional nickel sheets are used in cylindrical battery packs to improve the overcurrent capacity of the battery cell. The conventional nickel sheet will block the pressure relief valve of the battery cell after welding. Currently, conventional nickel strips are used to connect the battery cells in series and parallel. The manufacturing process is as follows: first, arrange the cylindrical battery cells according to the requirements using a fixed support, then place the overcurrent nickel row, then weld the overcurrent nickel sheet, and finally form the battery pack.

[0003] When using the cylindrical battery cell Pack structure, the conventional market cylindrical battery cell has the pressure relief valve below the positive electrode welding sheet. The use of conventional nickel sheets will block the pressure relief valve of the battery cell. In an emergency, the release of gas from the battery cell is blocked, which can easily cause the battery cell to explode, resulting in safety accidents. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a cylindrical battery cell Pack structure to solve the problem of the existing market cylindrical battery cell, the pressure relief valve below the positive electrode welding sheet, the use of conventional nickel sheets will block the pressure relief valve of the battery cell, the release of gas from the battery cell is blocked in an emergency, which can easily cause the battery cell to explode, resulting in safety accidents.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a cylindrical battery cell Pack structure, comprising a battery pack structure main body, the battery pack structure main body is provided with three groups, the top of the three groups of battery pack structure main body is close to the center and is provided with a battery pressure relief valve, the positive center of the three groups of battery pack structure main body is fixedly provided with a welding center sheet, the outer surface of the three welding center sheets is fixedly connected with a plurality of battery positive electrode welding surface support angle blocks in equal intervals along the circumferential direction, a busbar is fixedly welded between the top of the plurality of battery positive electrode welding surface support angle blocks, three busbar hollow grooves are opened in the top of the busbar in equal intervals along the horizontal direction, a welding surface connecting block is fixedly connected to the edge close to one side in the inside of the three busbar hollow grooves, and a busbar welding sheet is fixedly arranged on the outer surface of one side of the three welding surface connecting blocks.

[0006] As a preferred embodiment, the position of the busbar hollow groove corresponds to the position of the battery pressure relief valve.

[0007] As a preferred embodiment, the bottom of the three busbar welding sheets is welded one by one between the top of the welding center sheet.

[0008] As a preferred implementation, the bus bar electrically connects among three groups of battery pack structure bodies.

[0009] As a preferred implementation, the welding surface connecting block is welded after coinciding with the positive electrode welding surface supporting corner block of the battery cell.

[0010] As a preferred implementation, the bus bar is a layered structure, and 14 spot welding pieces are arranged on the bus bar layer.

[0011] Compared with the prior art, the utility model has the advantages of:

[0012] The utility model discloses a battery pack structure body is placed on the bus bar, and the welding center piece and the bus bar welding piece are welded after coinciding between the welding surface connecting block and the positive electrode welding surface supporting corner block of the battery cell, so that the hollow groove of the bus bar corresponds to the reserved pressure relief hole, the reserved pressure relief hole is convenient for effectively relieving pressure, the inside of the battery pack structure body does not have too much gas, and the safety accidents of battery cell explosion can be effectively avoided, the use safety of the device is improved, the assembly process of the battery pack structure body is simple, the manufacturing efficiency of the device is improved, and the use effect of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A front view three-dimensional structure schematic diagram of a cylindrical battery cell Pack structure is provided for the utility model;

[0014] Figure 2 A side view three-dimensional structure schematic diagram of a cylindrical battery cell Pack structure is provided for the utility model;

[0015] Figure 3 A bus bar part three-dimensional structure schematic diagram of a cylindrical battery cell Pack structure is provided for the utility model;

[0016] Figure 4 A battery pack structure body part three-dimensional structure schematic diagram of a cylindrical battery cell Pack structure is provided for the utility model.

[0017] In the drawing: 1, battery pack structure body;3, battery pressure relief valve;4, welding center piece;5, positive electrode welding surface supporting corner block of battery cell;6, bus bar;7, welding surface connecting block;8, bus bar welding piece;9, bus bar hollow groove. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further explained below by combining with the drawings and examples. It should be explained that, in the case of no conflict, the examples and features in the examples of the application can be combined with each other.

[0019] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be practiced without resorting to the different ways described herein, therefore, the present application is not limited to the specific embodiments disclosed in the following description.

[0020] Please refer to Figures 1-4 The utility model provides a technical scheme: a kind of cylindrical cell Pack structure, including battery pack structure main body 1, battery pack structure main body 1 is provided with three groups, the top of three groups of battery pack structure main body 1 is close to center place and is provided with battery pressure relief valve 3, the positive center of three groups of battery pack structure main body 1 is fixedly provided with welding center piece 5, the outer surface of three welding center pieces 5 is equidistantly fixedly connected with a plurality of cell positive pole welding surface support angle block 4 along circumferential direction, the top of a plurality of cell positive pole welding surface support angle block 4 is fixedly welded with busbar 6, three busbar hollow grooves 9 are equidistantly opened in the top of busbar 6 along horizontal direction, welding surface connecting block 7 is fixedly connected in the inside of three busbar hollow grooves 9 close to the edge of one side, three welding surface connecting blocks 7 one side outer surfaces are all fixedly provided with busbar welding piece 8, by placing busbar 6 on battery pack structure main body 1, welding surface connecting block 7 and cell positive pole welding surface support angle block 4 coincide after, welding center piece 5 and busbar welding piece 8 are welded, so that busbar hollow groove 9 and battery pressure relief valve 3 correspond, battery pressure relief valve 3 is conveniently effectively relieved, so that the inside of battery pack structure main body 1 does not exist too much gas, in turn can effectively avoid the safety accident of cell explosion, in turn improve the use safety of device.

[0021] Busbar hollow groove 9 and the position of battery pressure relief valve 3 correspond, the bottom of three busbar welding pieces 8 and the top of welding center piece 5 are welded one by one, by placing busbar 6 on battery pack structure main body 1, welding surface connecting block 7 and cell positive pole welding surface support angle block 4 coincide after, welding center piece 5 and busbar welding piece 8 are welded, so that busbar hollow groove 9 and battery pressure relief valve 3 correspond.

[0022] Busbar 6 connects electrically between three groups of battery pack structure main body 1, so that battery pack is conveniently assembled.

[0023] Welding surface connecting block 7 and cell positive pole welding surface support angle block 4 coincide after welding, so that the position of device is conveniently fixed, so that device is conveniently well utilized.

[0024] Busbar 6 is layered structure, 14 spot welding composite connections are made on the level of busbar 6, by layered fixing of busbar 6, the connecting effect of device is better.

[0025] Working principle: when the device is used, first by placing the busbar 6 on the battery structure body 1, so that the welding surface connecting block 7 and the positive electrode welding surface support angle block 4 coincide, then the welding center piece 5 and the busbar welding piece 8 are welded, so that the busbar hollow groove 9 corresponds to the battery pressure relief valve 3, the battery pressure relief valve 3 is convenient for effective pressure relief, so that there is not too much gas in the inside of the battery structure body 1, thereby effectively avoiding the safety accident of the battery explosion, thereby improving the use safety of the device, at the same time, the assembly process of the battery structure body 1 is also simple, so that the manufacturing efficiency of the device is improved, thereby improving the use effect of the device.

[0026] The above is only the preferred embodiment of the present application, not the other forms of the present application limit, any skilled in the art of the technical personnel may use the above disclosed technical content to change or modify the equivalent embodiment applied to other fields, but any simple modification, equivalent change and modification of the above embodiment without departing from the technical scheme content of the present application, according to the technical essence of the present application, still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A cylindrical cell pack structure comprising a battery pack structure main body (1), characterized by: The battery pack structure body (1) is provided with three groups, the top of the three groups of battery pack structure body (1) is provided with a battery pressure relief valve (3) near the center, the positive center of the three groups of battery pack structure body (1) is fixedly provided with a welded center piece (4), the outer surface of the three welded center pieces (4) is fixedly connected with a plurality of positive electrode welding surface support corner blocks (5) in the circumferential direction, a plurality of positive electrode welding surface support corner blocks (5) are fixedly connected with a bus bar (6) between the top, the top of the bus bar (6) is provided with three bus bar hollow grooves (9) in the horizontal direction, the inner side of the three bus bar hollow grooves (9) is fixedly connected with a welding surface connecting block (7), the outer surface of the three welding surface connecting blocks (7) is fixedly provided with a bus bar welding piece (8).

2. The cylindrical cell pack structure of claim 1, wherein: The position of the bus bar hollow groove (9) corresponds to the position of the battery pressure relief valve (3).

3. The cylindrical cell pack structure of claim 1, wherein: The bottom of the three bus bar welding pieces (8) is welded with the top of the welded center piece (4).

4. The cylindrical cell pack structure of claim 1, wherein: The bus bar (6) is electrically connected between the three groups of battery pack structure bodies (1).

5. The cylindrical cell pack structure of claim 1, wherein: The welding surface connecting block (7) is welded after coinciding with the positive electrode welding surface support corner block (5).

6. The cylindrical cell pack structure of claim 1, wherein: The bus bar (6) is a layered structure, and 14 spot welding composite connections are made on the bus bar (6) layer.

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