Soft package battery core combined module

Abstract

The utility model belongs to the technical field of battery modules, and discloses a soft package battery cell combined module which comprises a box body and a battery cell assembly fixed in the box body, the box body is a rectangular box with an opening in the top, and the box body is matched with the battery cell assembly; the battery cell assembly comprises a plurality of parallel modules, two electrode lugs, a plurality of first electrode connecting sheets and a plurality of second electrode connecting sheets; each parallel module comprises two soft package battery cells which are connected in parallel; the plurality of parallel modules are connected in series through the first electrode connecting sheet and the second electrode connecting sheet according to the electrical property; and the positive electrode end and the negative electrode end of the battery cell assembly are fixedly connected with electrode lugs respectively. Through multi-aspect structural improvement, the overall structural design is simplified, so that the convenience, the stability and the safety of the soft package battery core combined module in the transportation, installation and use processes are improved; and by arranging components such as the battery cell assembly and the electrode lugs, the stability and the safety during use are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, in particular to a soft-pack battery cell combination module. Background Art

[0002] Soft-pack battery modules can usually provide higher energy density, that is, in the same volume, soft-pack battery modules can store more energy, which is a great advantage for electronic products pursuing portability and long battery life. However, due to the soft shape of the soft-pack single battery cells, they are not easy to fix, and are extremely prone to scratches, pits, creases, etc. Therefore, the fastening and series-parallel connection of soft-pack power batteries are two major difficulties in the integration of soft-pack power battery packs; the service life of soft-pack battery cells is shorter than that of other types of batteries, and they may need to be replaced more frequently. Users need to frequently maintain and replace the batteries to ensure the normal service life of the batteries. Therefore, the service life and scalability of the soft-pack battery cell combination modules in the prior art are limited.

[0003] In the prior art, the Chinese utility model patent document with the publication number CN208889723U discloses a soft-pack battery module, which includes a plurality of soft-pack battery layers, two end plates, two end caps and at least one welding strap; the plurality of soft-pack battery layers are stacked in sequence, and each soft-pack battery layer is provided with a plurality of soft-pack battery cells, and a foam is arranged between adjacent two soft-pack battery cells; the two end plates are arranged on the opposite sides of the stacked plurality of soft-pack battery layers, one of the two end caps is clamped with the protruding part at one end of the plurality of soft-pack battery layers, and the other end cap is clamped with the protruding part at the other end of the plurality of soft-pack battery layers; at least one first clamping groove is arranged on the outer side surfaces of the two end plates, and both ends of each welding strap are clamped into the first clamping grooves of the two end plates for binding the two end plates and the stacked plurality of soft-pack battery layers. Although this prior art solves the technical problems of difficult combination of soft-pack batteries and deformation of the module caused by expansion of soft-pack battery cells, it has many assembled parts, resulting in difficult maintenance and repair; a foam is also arranged between the soft-pack battery cells, bringing the problem of difficult heat dissipation.

[0004] The above-mentioned patented technical solution also has the following deficiencies in actual use: First, there is no design of standard parts, unified connecting parts and installation and fixing parts for module expansion, which is not conducive to the expansion of the combination module; second, the overall structure design is relatively complex, the soft-pack battery cells mostly adopt complex wire arrangement and welding connections, and foams need to be arranged between multiple batteries; the soft-pack battery cells in the module are only connected in series or in parallel, which is likely to affect the stability of the entire module due to the failure of a single soft-pack battery cell; third, the expandability is not strong, and it is not easy to perform series-parallel connection with other combination modules; fourth, it is easy to be damaged and deformed by external object collision during installation, transportation and use, and in severe cases, it will cause faults such as internal short circuit of the battery cell combination module, affecting the safety and service life of the product. Summary of the Invention

[0005] The purpose of the utility model is to provide a soft-pack battery cell combination module. Through structural improvement designs in multiple aspects, on the basis of simplifying the overall structural design, the convenience, stability, and safety during the transportation, installation, and use of the soft-pack battery cell combination module are improved at the same time; by setting components such as battery cell components and electrode tabs, the stability and safety during use are improved; by improving the designs of the epoxy resin fixing plate, electrode plates, the first electrode connecting piece, and the second electrode connecting piece, the assembly efficiency of the combination module is improved; by setting mutually cooperating soft-pack battery cells to form a parallel module, the rapid combination and disassembly of the combination module are facilitated, and problems such as the soft-pack battery cells being prone to collision deformation due to poor positioning of the combination module are avoided, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A soft-pack battery cell combination module, which includes: a box body and a battery cell component fixed in the box body; the box body is a rectangular box shape with an open top, and the box body matches the battery cell component;

[0008] The battery cell component includes: a plurality of parallel modules, two electrode tabs, a plurality of first electrode connecting pieces, and a plurality of second electrode connecting pieces; each parallel module includes: two parallel-connected soft-pack battery cells; each soft-pack battery cell is a rectangular sheet, and one end in the length direction is fixedly connected with electrode plates of different polarities;

[0009] The plurality of parallel modules are connected in series through the first electrode connecting pieces and the second electrode connecting pieces according to electrical properties; the positive and negative ends of the battery cell component are respectively fixedly connected with electrode tabs.

[0010] Further, the electrode plate of the soft-pack battery cell is an L-shaped two-sided structure, one surface of which is a supporting surface for electrically connecting with the soft-pack battery cell, and the other surface is a connecting surface for fixed connection; the electrode plates of the same soft-pack battery cell face the same direction.

[0011] Further, for each soft-pack battery cell in the parallel module, the orientation of the electrode plate of one soft-pack battery cell is opposite to that of the electrode plate of the other soft-pack battery cell, and the height of the connecting surface of the electrode plate of one soft-pack battery cell is lower than the height of the connecting surface of the electrode plate of the other soft-pack battery cell.

[0012] Further, within the parallel module, the two soft-pack battery cells are superposed to form a superposed body; wherein, the connecting surfaces of the corresponding electrode plates of the soft-pack battery cells overlap each other.

[0013] Further, the battery cell assembly further includes: a plurality of bolts; electrode holes matching the bolts are provided on the connection surfaces of the plurality of first electrode connection pieces, the plurality of second electrode connection pieces, and each electrode piece; the bolts respectively pass through the first electrode connection piece or the second electrode connection piece and are fixedly connected to the corresponding electrode piece.

[0014] Further, the plurality of parallel modules are further provided with: a metal connection piece and an epoxy resin fixing plate; bolt holes are provided on the metal connection piece, and a through-hole cylinder is provided at one end of the bolt hole of the metal connection piece; the epoxy resin fixing plate is provided with grooves matching the bolt holes and the through-hole cylinder of the metal connection piece, and the through-hole cylinder is fixed in the groove of the epoxy resin fixing plate.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The soft-pack battery cell combination module provided by the present utility model improves the convenience, stability and safety during the transportation, installation and use of the soft-pack battery cell combination module while simplifying the overall structural design through structural improvement designs in multiple aspects. By setting components such as the battery cell assembly and the electrode tabs, the stability and safety during use are improved; by improving the designs of the epoxy resin fixing plate, the electrode piece, the first electrode connection piece and the second electrode connection piece, the assembly efficiency of the combination module is improved; by setting the cooperating soft-pack battery cells to form parallel modules, it is convenient for the quick combination and disassembly of the combination module, avoiding problems such as the soft-pack battery cells being prone to collision and deformation due to poor positioning of the combination module, and being able to better solve the problems raised in the prior art.

[0017] 2. The present utility model simplifies the structural design as a whole, unifies the specification dimensions of the battery cell assembly, and can form a parallel module only by changing the installation direction of the electrode piece, enabling standardized expansion and improving the assembly efficiency of the combination module.

[0018] 3. By improving the battery cell assembly, the first electrode connection piece and the second electrode connection piece provided by the present utility model are used in cooperation with the soft-pack battery cells, which is convenient for the quick combination and disassembly during the series connection of the combination module. The box body matches the battery cell assembly, avoiding problems such as the battery cells being prone to collision and deformation due to improper placement of the battery cell assembly.

[0019] 4. By improving the metal connection piece and the epoxy resin fixing plate and presetting the grooving positions, the connection between the box body and the epoxy resin top plate is facilitated, the positioning process is saved, and at the same time, it is ensured that the epoxy resin cover plate is not easily detached.

[0020] 5. The soft-pack battery cell combination module of the present utility model is convenient for parallel and series connection through the improved motor ear setting, and is fixedly connected by bolts, which is convenient for maintenance; the sealed soft-pack battery cells in the shell further improve the use safety of the soft-pack battery cell combination module. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall three-dimensional external shape structure of the soft-pack battery cell combination module in an embodiment of the present application;

[0022] Figure 2 is a schematic top view structure diagram of the soft-pack battery cell combination module in an embodiment of the present application;

[0023] Figure 3 is a schematic front view structure diagram of the soft-pack battery cell combination module in an embodiment of the present application;

[0024] Figure 4 is a schematic right view structure diagram of the soft-pack battery cell combination module in an embodiment of the present application;

[0025] Figure 5 is a schematic assembly structure diagram of the first electrode connecting piece, the second electrode connecting piece, and the electrode tab of the soft-pack battery cell combination module in an embodiment of the present application;

[0026] Figure 6 is a schematic assembly structure diagram of the metal connecting piece of the soft-pack battery cell combination module in an embodiment of the present application;

[0027] Figure 7 is a schematic structure diagram of the epoxy resin fixing plate of the soft-pack battery cell combination module in an embodiment of the present application;

[0028] Figure 8 is a schematic structure diagram of the epoxy resin cover plate of the soft-pack battery cell combination module in an embodiment of the present application;

[0029] Figure 9 is a schematic structure diagram of the epoxy resin side plate of the soft-pack battery cell combination module in an embodiment of the present application;

[0030] Figure 10 is a schematic assembly structure diagram of the box body and the epoxy resin bottom plate of the soft-pack battery cell combination module in an embodiment of the present application;

[0031] Figure 11 is a schematic assembly structure diagram of the soft-pack battery cell and the epoxy resin partition of the soft-pack battery cell combination module in an embodiment of the present application;

[0032] Figure 12 is a schematic assembly structure diagram of the soft-pack battery cell combination module in an embodiment of the present application.

[0033] Description of the reference numerals: 1. Box body; 2. Battery cell assembly; 21. Electrode tab; 22. First electrode connecting piece; 23. Metal connecting piece; 24. Epoxy resin fixing plate; 25. Epoxy resin cover plate; 26. Epoxy resin side plate; 27. Epoxy resin bottom plate; 28. Second electrode connecting piece; 29. Soft-pack battery cell; 30. Epoxy resin partition. Detailed implementation manners

[0034] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] Embodiment 1

[0036] Refer to the attached Figures 1-12 , the soft-pack battery cell combination module provided in this embodiment is a soft-pack battery cell combination module applied to the production of electronic and electrical appliances batteries or power batteries, and includes: a box body 1 and a battery cell assembly 2 fixed in the box body 1; the box body 1 is a rectangular box shape with an open top, and the box body 1 matches the battery cell assembly 2;

[0037] The battery cell assembly 2 includes: a plurality of parallel modules, two electrode tabs 21, a plurality of first electrode connection sheets 22, and a plurality of second electrode connection sheets 28; each parallel module includes: two parallel soft-pack battery cells 29; each soft-pack battery cell 29 is a rectangular sheet, and one end in the length direction is fixedly connected with electrode sheets of different polarities;

[0038] The plurality of parallel modules are connected in series through the first electrode connection sheets 22 and the second electrode connection sheets 28 according to the electrical property; the positive and negative ends of the battery cell assembly 2 are fixedly connected with electrode tabs 21 respectively.

[0039] The soft-pack battery cell combination module provided in this embodiment simplifies the overall structural design through structural improvement designs in multiple aspects to improve the convenience, stability, and safety during the transportation, installation, and use of the soft-pack battery cell combination module; by setting components such as the battery cell assembly and electrode tabs, the stability and safety during use are improved; by improving the designs of the epoxy resin fixing plate, electrode sheets, first electrode connection sheets, and second electrode connection sheets, the assembly efficiency of the combination module is improved; by setting matching soft-pack battery cells to form parallel modules, it is convenient for the rapid combination and disassembly of the combination module, avoiding problems such as the soft-pack battery cells being prone to collision and deformation due to poor positioning of the combination module, and preferably solving the problems proposed in the prior art.

[0040] Embodiment 2

[0041] Refer to Figures 1 to 12 , the soft-pack battery cell combination module provided in this embodiment is further improved on the basis of the above Embodiment 1:

[0042] Preferably, refer to Figure 11, the electrode plates of the soft-pack battery cell 29 are L-shaped two-sided structures, where one side is a support surface for electrically connecting with the soft-pack battery cell 29, and the other side is a connection surface for fixed connection; the electrode plates of the same soft-pack battery cell 29 face the same direction.

[0043] Preferably, referring to Figure 11 , for each soft-pack battery cell 29 in the parallel module, the electrode plates of one soft-pack battery cell 29 face in the opposite direction to those of the other soft-pack battery cell 29, and the height of the connection surface of the electrode plates of one soft-pack battery cell 29 is lower than that of the connection surface of the electrode plates of the other soft-pack battery cell 29.

[0044] Preferably, referring to Figure 11 , within the parallel module, two soft-pack battery cells 29 are stacked on top of each other to form a stack; among them, the connection surfaces of the corresponding electrode plates of the soft-pack battery cells 29 overlap each other; this overlap is an up-and-down surface overlap to ensure the electrical connection of the electrode plates after parallel connection.

[0045] Preferably, referring to Figure 5 , the battery cell assembly 2 further includes: a plurality of bolts; electrode holes matching the bolts are provided on the connection surfaces of the plurality of first electrode connection pieces 22, the plurality of second electrode connection pieces 28, and each electrode plate; the bolts respectively pass through the first electrode connection piece 22 or the second electrode connection piece 28 and are fixedly connected to the corresponding electrode plate.

[0046] Preferably, on the plurality of parallel modules, there are also provided: a metal connection piece 23 and an epoxy resin fixing plate 24; bolt holes are provided on the metal connection piece 23, and a through-hole cylinder is provided at one end of the bolt hole of the metal connection piece 23; the epoxy resin fixing plate 24 is provided with grooves matching the bolt holes and the through-hole cylinder of the metal connection piece 23, and the through-hole cylinder is fixed in the groove of the epoxy resin fixing plate 24.

[0047] Preferably, referring to Figure 3 、 Figure 4 Both of the two electrode tabs 21 are located outside the plurality of second electrode connection pieces 28, and are fixedly connected to the corresponding electrode plate through bolts.

[0048] Embodiment 3

[0049] Referring to Figures 1 to 12 , on the basis of the above-mentioned Embodiment 1 and Embodiment 2, further improvement is made, and epoxy resin partitions 30 are provided between the plurality of soft-pack battery cells 29.

[0050] Preferably, on the top of the plurality of parallel modules, there is also provided: an epoxy resin cover plate 25, and grooves for passing bolts are provided on the epoxy resin cover plate 25.

[0051] Preferably, referring to Figure 12, an epoxy resin bottom plate 27 is provided below the battery cell assembly 2; epoxy resin partitions 30 and epoxy resin side plates 26 are respectively provided on the sides of the battery cell assembly 2.

[0052] In summary, in the above embodiments of the present utility model, the key is to simplify the overall structural design through structural improvements in multiple aspects, unify the specification dimensions of the parallel modules and the battery cell assemblies, and only by changing the installation direction of the electrode plates, a parallel module can be formed, which can be standardized and expanded, improving the assembly efficiency of the combined module. By improving the battery cell assembly, the first electrode connecting piece and the second electrode connecting piece are provided and used in cooperation with the soft-pack battery cell, which is convenient for the quick combination and disassembly during the series connection of the combined module. The box body and the battery cell assembly are matched to avoid problems such as easy collision and deformation of the battery cells due to improper placement of the battery cell assembly. By improving the metal connecting piece and the epoxy resin fixing plate and presetting the slotting positions, the connection between the box body and the epoxy resin top plate is facilitated, the positioning process is saved, and at the same time, it is ensured that the epoxy resin cover plate is not easily detached. Through the improved motor ear setting of the soft-pack battery cell combined module of the present utility model, parallel and series connections are convenient, and bolt fixed connections are used, which is convenient for maintenance; the sealed soft-pack battery cell is in the shell, further improving the use safety of the soft-pack battery cell combined module.

[0053] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A soft-pack battery cell combination module, characterized in that, It includes: a box body (1) and a battery cell assembly (2) fixed inside the box body (1); the box body (1) is a rectangular box shape with an open top, and the box body (1) matches the battery cell assembly (2); the battery cell assembly (2) includes: a plurality of parallel modules, two electrode tabs (21), a plurality of first electrode connection sheets (22), and a plurality of second electrode connection sheets (28); each parallel module includes: two parallel soft-pack battery cells (29); each soft-pack battery cell (29) is a rectangular sheet, and one end in the length direction is fixedly connected with electrode sheets of different polarities; the plurality of parallel modules are connected in series through the first electrode connection sheets (22) and the second electrode connection sheets (28) according to electrical properties; the positive extreme and the negative extreme of the battery cell assembly (2) are respectively fixedly connected with electrode tabs (21).

2. The soft-pack battery cell combination module according to claim 1, wherein, The electrode sheet of the soft-pack battery cell (29) is an L-shaped two-sided structure, one of which is a support surface for electrically connecting with the soft-pack battery cell (29), and the other is a connection surface for fixed connection; the electrode sheets of the same soft-pack battery cell (29) face the same direction.

3. The soft-pack battery cell combination module according to claim 2, wherein, For each soft-pack battery cell (29) in the parallel module, the orientation of the electrode sheets of one soft-pack battery cell (29) is opposite to that of the electrode sheets of the other soft-pack battery cell (29), and the height of the connection surface of the electrode sheets of one soft-pack battery cell (29) is lower than the height of the connection surface of the electrode sheets of the other soft-pack battery cell (29).

4. The soft-pack battery cell combination module according to claim 3, characterized in that, Inside the parallel module, the two soft-pack battery cells (29) are superposed into a superposed body; wherein, the connection surfaces of the corresponding electrode sheets of the soft-pack battery cells (29) overlap each other.

5. The soft-pack battery cell combination module according to claim 4, wherein The battery cell assembly (2) further includes: a plurality of bolts; electrode holes matching the bolts are provided on the connection surfaces of the plurality of first electrode connection sheets (22), the plurality of second electrode connection sheets (28), and each electrode sheet; the bolts respectively pass through the first electrode connection sheet (22) or the second electrode connection sheet (28) and are fixedly connected with the corresponding electrode sheet.

6. The soft-pack battery cell combination module according to claim 5, wherein A metal connection sheet (23) and an epoxy resin fixing plate (24) are further provided on the plurality of parallel modules; bolt holes are provided on the metal connection sheet (23), and a through-hole cylinder is provided at one end of the bolt hole of the metal connection sheet (23); the epoxy resin fixing plate (24) is provided with grooves matching the bolt holes and the through-hole cylinder of the metal connection sheet (23), and the through-hole cylinder is fixed in the groove of the epoxy resin fixing plate (24).

7. The soft-pack battery cell combination module according to claim 6, characterized in that, The two electrode tabs (21) are both located outside the plurality of second electrode connection sheets (28), and are fixedly connected with the corresponding electrode sheets through bolts.

8. The soft-pack battery cell combination module according to any one of claims 1-7, characterized in that, Epoxy resin partitions (30) are provided between the plurality of soft-pack battery cells (29).

9. The soft-pack battery cell combination module according to any one of claims 1-7, characterized in that, An epoxy resin cover plate (25) is further provided on the top of the plurality of parallel modules, and a groove for passing bolts is provided on the epoxy resin cover plate (25).

10. The soft-pack battery cell combination module according to any one of claims 1-7, characterized in that, An epoxy resin bottom plate (27) is provided below the battery cell assembly (2); epoxy resin partitions (30) and epoxy resin side plates (26) are respectively provided on the sides of the battery cell assembly (2).

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