Soft package battery cell tab bending tool

Abstract

The utility model provides a soft package battery cell tab bending tool which comprises a movable bottom plate and a tab bending assembly, the movable bottom plate and the tab bending assembly are respectively installed on a tool bottom plate, the movable bottom plate is located on one side of the tab bending assembly, the movable bottom plate can slide relative to the tab bending assembly, and the movable bottom plate is located on the other side of the tab bending assembly. The soft package battery cell is detachably installed on the movable bottom plate, the movable bottom plate can drive the soft package battery cell to be close to or away from the tab bending assembly, and the execution end of the tab bending assembly can bend a tab at the end of the soft package battery cell. According to the soft package battery cell tab bending tool, the movable bottom plate is a positioning structure of the soft package battery cell, the soft package battery cell can be driven to abut against the tab bending assembly through the movable bottom plate, the tab of the soft package battery cell is bent through the tab bending assembly, the tool can be suitable for different product specifications, operation is simple, and the working efficiency is high. The method is suitable for early-stage opening and small-batch production of products and meets the manufacturing requirements.

Description

Technical Field

[0001] The utility model belongs to the field of battery production, and particularly relates to a bending tooling for the tabs of a soft-pack battery cell. Background Technique

[0002] Energy storage technology refers to storing energy under certain conditions for release when needed to achieve the balance and optimal utilization of energy. With the rapid development and application of new energy, the application of energy storage technology has received extensive attention and promotion. In the new energy storage industry, a module integrated with soft-pack battery cells is generally formed by connecting the battery cells in series and parallel. According to different structural forms, the tabs need to be pre-bent to fit the current collector. The pre-bending of the tabs is a necessary process in the module manufacturing process. Since the structural strength of the soft-pack battery cell is relatively low, when bending the tabs, the force on the positions outside the bending area should be avoided (such as the connection area between the tab and the electrode plate or the edge sealing of the aluminum-plastic film, etc.). In addition, the tab also needs to be welded to the current collector, and the flatness after bending needs to be ensured to avoid poor welding.

[0003] In the prior art, through the supporting tooling fixture and the debugged program parameters, the automatic bending of the tabs of the soft-pack battery cell can be realized. Among them, the soft-pack battery cell is fixed on the assembly line tray through the tooling fixture and automatically flows into the tab bending work station. The bending die presses down to bend the tab to the preset shape, and then it automatically flows out.

[0004] The above prior art is applicable to the products on the production line, and the bending position and parameters need to be debugged in the early stage. It is not applicable to the sample production with a small quantity in the initial stage of product development. Because in the bending process of the prior art, when the size of the soft-pack battery cell needs to be changed, the parameters need to be adjusted again in terms of software, and the tooling fixture needs to be optimized and adjusted in terms of hardware, with a long time cycle and high cost. Therefore, a device that can flexibly change parameters such as the bending position and size of the tab in the product development stage is needed. Summary of the Invention

[0005] In view of this, the utility model aims to provide a bending tooling for the tabs of a soft-pack battery cell to solve the problems that the existing tab bending device is cumbersome to operate when changing the bending specifications and is not suitable for the production in the product development stage.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] A bending tooling for the tabs of a soft-pack battery cell includes a moving bottom plate and a tab bending assembly, and the moving bottom plate and the tab bending assembly are respectively installed on the tooling bottom plate. The moving bottom plate is located on one side of the tab bending assembly, and the moving bottom plate can slide relative to the tab bending assembly. The soft-pack battery cell is detachably installed on the moving bottom plate, and the moving bottom plate can drive the soft-pack battery cell to approach or move away from the tab bending assembly. The execution end of the tab bending assembly can bend the tab at the end of the soft-pack battery cell.

[0008] Further, a chute is provided on the tooling base plate, and both sides of the moving base plate are respectively slidably connected into the chute. A fixing block is installed on the tooling base plate, and an adjusting bolt is threadedly connected to the fixing block. One end of the adjusting bolt can abut against one end of the moving base plate, and the tab bending assembly is located at the other end of the moving base plate.

[0009] Further, a mark is provided on the tooling base plate or the moving base plate, and the mark can detect the moving distance of the moving base plate relative to the tooling base plate.

[0010] Further, a limiting plate is arranged on the moving base plate, and the end of the soft-pack battery cell can abut against one side of the limiting plate, and the limiting plate does not interfere with the execution end of the tab bending assembly to bend the tabs at the end of the soft-pack battery cell.

[0011] Further, a long hole is provided on the moving base plate, a fixing hole is provided on the limiting plate, and the periphery of the fixing bolt is respectively located in the fixing hole and the long hole, and the periphery of the fixing bolt can slide in the long hole.

[0012] Further, the tab bending assembly includes a linear module, an upper die, a lower die and a fixing plate. The lower die and the fixing plate are arranged oppositely, and the lower die and the linear module are respectively installed on the tooling base plate. The movable end of the linear module is respectively installed with the upper die and the fixing plate, and the upper die is located on one side of the fixing plate. The fixing plate and the lower die are used to clamp and fix the tabs of the soft-pack battery cell, and the movable upper die is used to bend the tabs.

[0013] Further, a boss and a groove are respectively arranged at the upper end of the lower die. The boss and the fixing plate are used to clamp and hold the tabs, and the upper die cooperates with the groove to bend the tabs.

[0014] Further, a guide post is arranged on the tooling base plate. The periphery of the guide post is slidably connected to the lower pressing plate through a linear guide sleeve. The movable end of the linear module installs the upper die and the fixing plate through the lower pressing plate.

[0015] Further, a return spring is arranged on the guide post. The two ends of the return spring are respectively fixedly connected to the upper end of the tooling base plate and the lower end of the lower pressing plate.

[0016] Further, the lower die is arranged at the lower end of the lower pressing plate, and a support plate is arranged on one side of the lower pressing plate. A sliding hole is provided on the support plate, and a sliding shaft is slidably connected into the sliding hole. The upper end of the sliding shaft can be clamped to the upper end of the support plate, the lower end of the sliding shaft installs the fixing plate, and a pressing spring is arranged on the periphery of the sliding shaft. The two ends of the pressing spring are respectively connected to the upper end of the fixing plate and the lower end of the support plate.

[0017] Compared with the prior art, the soft-pack battery cell tab bending tooling of the present utility model has the following

[0018] Beneficial effects:

[0019] (1) A kind of soft-pack battery cell tab bending tooling according to the present utility model, the moving bottom plate is a positioning structure of the soft-pack battery cell, and the soft-pack battery cell can be driven by the moving bottom plate to abut against the tab bending assembly, and the tabs of the soft-pack battery cell are bent by the tab bending assembly. This tooling can be applicable to different product specifications, and is easy to operate, suitable for the early-stage development and small-batch production of products, and meets the manufacturing requirements.

[0020] (2) A kind of soft-pack battery cell tab bending tooling according to the present utility model, the sliding track of the moving bottom plate can be limited by the chute, so that the moving bottom plate can push the soft-pack battery cell to the processing position of the tab bending assembly.

[0021] (3) A kind of soft-pack battery cell tab bending tooling according to the present utility model, a limiting plate is arranged on the moving bottom plate, and the limiting plate can limit the relative position between the soft-pack battery cell and the moving bottom plate, and does not interfere with the tab bending assembly to bend the tabs.

[0022] (4) A kind of soft-pack battery cell tab bending tooling according to the present utility model, the periphery of the fixing bolt is respectively located in the fixing hole and the long hole, and the periphery of the fixing bolt can slide in the long hole to meet the limiting requirements of soft-pack battery cells of different specifications and improve the versatility of the device.

[0023] (5) A kind of soft-pack battery cell tab bending tooling according to the present utility model, the fixing plate and the lower die can be driven to clamp by the linear module, so as to fix the relative position of the tabs, prevent the tabs and the soft-pack battery cell from being pulled during bending, improve the production quality, and the tabs are bent by the cooperation of the upper die and the lower die.

[0024] (6) A kind of soft-pack battery cell tab bending tooling according to the present utility model, the lower end of the sliding shaft is installed with a fixing plate. Because the tab monomer is relatively thin, connecting the fixing plate through the sliding shaft can provide a floating space for the relative position of the fixing plate, prevent the fixing plate from being clamped hard with the lower die and damaging the tabs, and in order to ensure that the fixing plate is always clamped to the lower die, a compression spring is arranged on the periphery of the sliding shaft, and the compression spring provides a downward pressing elasticity for the fixing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0026] Figure 1 is a schematic structural diagram of a kind of soft-pack battery cell tab bending tooling according to an embodiment of the present utility model;

[0027] Figure 2Schematic diagram of the structure of the mobile bottom plate and the soft-pack battery cell according to the embodiment of the present utility model;

[0028] Figure 3 Schematic diagram of the structure of the tab bending assembly according to the embodiment of the present utility model;

[0029] Figure 4 Side view schematic diagram of the tab bending assembly according to the embodiment of the present utility model;

[0030] Figure 5 Schematic diagram of the structure of a housing added to the tab bending tooling for the soft-pack battery cell according to the embodiment of the present utility model.

[0031] Explanation of reference numerals:

[0032] 1 - Mobile bottom plate; 11 - Limiting plate; 12 - Fixed hole; 13 - Long hole; 2 - Tooling bottom plate; 21 - Fixed block; 22 - Adjusting bolt; 23 - Slide groove; 24 - Mark; 25 - Long hole; 3 - Tab bending assembly; 31 - Linear module; 32 - Upper die; 33 - Lower die; 34 - Fixed plate; 35 - Boss; 36 - Type groove; 37 - Guide post; 38 - Lower pressing plate; 39 - Return spring; 310 - Support plate; 311 - Slide shaft; 312 - Compression spring; 4 - Soft-pack battery cell; 41 - Tab. Detailed implementation manners

[0033] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0037] As Figures 1 - 5 , a soft-pack battery cell tab bending tooling includes a moving base plate 1 and a tab bending assembly 3, and the moving base plate 1 and the tab bending assembly 3 are respectively installed on a tooling base plate 2. The moving base plate 1 is located on one side of the tab bending assembly 3, and the moving base plate 1 can slide relative to the tab bending assembly 3. The soft-pack battery cell 4 is detachably installed on the moving base plate 1. The moving base plate 1 can drive the soft-pack battery cell 4 to approach or move away from the tab bending assembly 3. The execution end of the tab bending assembly 3 can bend the tab 41 at the end of the soft-pack battery cell 4. The moving base plate 1 is a positioning structure of the soft-pack battery cell 4, and the moving base plate 1 can drive the soft-pack battery cell 4 to abut against the tab bending assembly 3, and the tab 41 of the soft-pack battery cell 4 is bent by the tab bending assembly 3. This tooling can be applicable to different product specifications, and has simple operation, is suitable for the early development and small-batch production of products, and meets the manufacturing requirements.

[0038] A chute 23 is provided on the tooling base plate 2. The two sides of the moving base plate 1 are respectively slidably connected into the chute 23, and a fixing block 21 is installed on the tooling base plate 2. An adjusting bolt 22 is threadedly connected to the fixing block 21. One end of the adjusting bolt 22 can abut against one end of the moving base plate 1, and the tab bending assembly 3 is located at the other end of the moving base plate 1, and as Figure 2 described, the chute 23 is provided on a support plate, and a support plate is respectively provided on the two sides of the moving base plate 1. The chute 23 is provided on the inner side of the support plate. The sliding track of the moving base plate 1 can be defined through the chute 23, so that the moving base plate 1 can push the soft-pack battery cell 4 to the processing position of the tab bending assembly 3, and as Figure 2 shown, a mark 24 is provided on the tooling base plate 2 or the moving base plate 1. In this embodiment, the mark 24 is provided on the tooling base plate 2, and a pointer is provided on the moving base plate 1, and the mark 24 is a ruler. The moving distance of the moving base plate 1 relative to the tooling base plate 2 can be observed by the pointer pointing to the mark 24.

[0039] To facilitate the positioning of the moving base plate 1 for the soft-pack battery cell 4, a limiting plate 11 is provided on the moving base plate 1. The end of the soft-pack battery cell 4 can abut against one side of the limiting plate 11, and the limiting plate 11 does not interfere with the execution end of the tab bending assembly 3 to bend the tab 41 at the end of the soft-pack battery cell 4. As Figure 2 shown, the limiting plate 11 in this embodiment is an L-shaped structure, and two limiting plates 11 are provided at the end of the moving base plate 1. The two limiting plates 11 are arranged oppositely. One end of the limiting plate 11 is connected to the moving base plate 1, and the other end of the limiting plate 11 is used to position the end of the soft-pack battery cell 4. An opening is provided between the two oppositely arranged limiting plates 11, and the tab 41 is located in the opening. Thus, the limiting plate 11 can limit the relative position between the soft-pack battery cell 4 and the moving base plate 1 and does not interfere with the tab bending assembly 3 to bend the tab 41.

[0040] A long hole 2513 is provided on the moving base plate 1, and a fixing hole 12 is provided on the limiting plate 11. The periphery of the fixing bolt is respectively located in the fixing hole 12 and the long hole 2513, and the periphery of the fixing bolt can slide in the long hole 2513. During implementation, both the fixing hole 12 and the long hole 2513 can be set as oval holes to meet the limiting requirements of soft-pack battery cells 4 of different specifications. As Figure 2 shown, the fixing hole 12 and the long hole 2513 in this embodiment are arranged perpendicular to each other.

[0041] The tab bending assembly 3 includes a linear module 31, an upper die 32, a lower die 33, and a fixing plate 34. The lower die 33 and the fixing plate 34 are arranged oppositely, and the lower die 33 and the linear module 31 are respectively installed on the tooling base plate 2. The movable end of the linear module 31 is respectively installed with the upper die 32 and the fixing plate 34, and the upper die 32 is located on one side of the fixing plate 34. The fixing plate 34 and the lower die 33 are used to clamp the tab 41 of the soft-pack battery cell 4, and the moving upper die 32 is used to bend the tab 41. During implementation, the linear module 31 can be any one of a push rod cylinder, a linear motor, a hydraulic cylinder, or a lead screw module. In this embodiment, the linear module 31 is a push rod cylinder. The push rod cylinder can drive the fixing plate 34 and the lower die 33 to clamp each other, thereby fixing the relative position of the tab 41, preventing the tab 41 and the soft-pack battery cell 4 from being pulled during bending, improving the production quality, and realizing the bending of the tab through the cooperation of the upper die 32 and the lower die 33.

[0042] As Figure 4 shown, convex platforms 35 and a groove 36 are respectively provided at the upper end of the lower die 33. The convex platforms 35 cooperate with the fixing plate 34 to clamp the tab 41, and the upper die 32 cooperates with the groove 36 to bend the tab 41. The convex platforms 35 and the groove 36 can change the forming contour according to requirements and are detachable units, reducing the investment in the entire device and the production and R & D costs.

[0043] A guide post 37 is provided on the tooling base plate 2. The outer periphery of the guide post 37 is slidably connected to the lower pressing plate 38 through a linear guide sleeve. The movable end of the linear module 31 is provided with an upper die 32 and a fixing plate 34 through the lower pressing plate 38. A return spring 39 is provided on the guide post 37. The two ends of the return spring 39 are respectively fixedly connected to the upper end of the tooling base plate 2 and the lower end of the lower pressing plate 38. The displacement trajectory of the upper die 32 and the fixing plate 34 is defined by the guide post 37, which improves the production accuracy. Moreover, the upper die 32 and the fixing plate 34 can be rebounded by the return spring 39, which can reduce the selection requirements for the external gas injection equipment.

[0044] A lower die 33 is provided at the lower end of the lower pressing plate 38. A support plate 310 is provided on one side of the lower pressing plate 38. A sliding hole is provided on the support plate 310. A sliding shaft 311 is slidably connected to the sliding hole, and the upper end of the sliding shaft 311 can be clamped to the upper end of the support plate 310. The lower end of the sliding shaft 311 is provided with a fixing plate 34. Since the single body of the tab 41 is relatively thin, connecting the fixing plate 34 through the sliding shaft 311 can provide a floating space for the relative position of the fixing plate 34, preventing the fixing plate 34 from being clamped hard with the lower die 33 and damaging the tab 41. Moreover, to ensure that the fixing plate 34 is always clamped to the lower die 33, a pressing spring 312 is provided on the outer periphery of the sliding shaft 311. The two ends of the pressing spring 312 are respectively connected to the upper end of the fixing plate 34 and the lower end of the support plate 310. The pressing spring 312 provides a downward pressing elasticity for the fixing plate 34.

[0045] The control mode of this embodiment is controlled by a controller. The control circuit of the controller can be realized by simple programming of those skilled in the art. The provision of power also belongs to the common knowledge in the art. And this article is mainly used to protect the mechanical device. The control mode and circuit connection are not explained in detail in this article. And during implementation, there is mechanical transmission in the tab bending assembly 3. To improve production safety, as Figure 5 shown, the tab bending assembly 3 can be integrally installed in a protective outer cover. For the specific implementation situation, the staff can determine according to the working conditions, which will not be elaborated here.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A soft-pack battery cell tab bending tool, characterized in that: The invention comprises a movable base plate (1) and a tab bending assembly (3), wherein the movable base plate (1) and the tab bending assembly (3) are respectively mounted on a tooling base plate (2), the movable base plate (1) is located on one side of the tab bending assembly (3), the movable base plate (1) can slide relative to the tab bending assembly (3), the soft-pack battery cell (4) is disassembled and mounted on the movable base plate (1), the movable base plate (1) can drive the soft-pack battery cell (4) to approach or move away from the tab bending assembly (3), and the execution end of the tab bending assembly (3) can bend the tab (41) at the end of the soft-pack battery cell (4).

2. The soft-pack battery cell tab bending tool according to claim 1, characterized in that: A slide groove (23) is provided on the tooling base plate (2), and the two sides of the movable base plate (1) are respectively slidably connected to the slide grooves (23), and a fixed block (21) is installed on the tooling base plate (2), and an adjusting bolt (22) is threadedly connected to the fixed block (21), and one end of the adjusting bolt (22) can abut against one end of the movable base plate (1), and the tab bending assembly (3) is located at the other end of the movable base plate (1).

3. The soft-pack battery cell tab bending tool according to claim 1, characterized in that: A mark (24) is provided on the tooling base plate (2) or the movable base plate (1), and the mark (24) can detect the moving distance of the movable base plate (1) relative to the tooling base plate (2).

4. The soft-pack battery cell tab bending tool according to claim 1, characterized in that: A limiting plate (11) is arranged on the movable bottom plate (1), and the end of the soft-pack battery cell (4) can abut against one side of the limiting plate (11), and the limiting plate (11) does not interfere with the execution end of the tab bending assembly (3) in bending the tab (41) at the end of the soft-pack battery cell (4).

5. The soft-pack battery cell tab bending tool according to claim 4, characterized in that: The movable bottom plate (1) is provided with a long hole (13), the limiting plate (11) is provided with a fixing hole (12), the periphery of the fixing bolt is respectively located in the fixing hole (12) and the long hole (13), and the periphery of the fixing bolt can slide in the long hole (13).

6. The soft-pack battery cell tab bending tool according to claim 1, characterized in that: The tab bending assembly (3) comprises a linear module (31), an upper die (32), a lower die (33) and a fixed plate (34); the lower die (33) and the fixed plate (34) are arranged opposite to each other, and the lower die (33) and the linear module (31) are respectively mounted on a tooling base plate (2); the upper die (32) and the fixed plate (34) are respectively mounted on the movable ends of the linear module (31), and the upper die (32) is located on one side of the fixed plate (34); the fixed plate (34) and the lower die (33) are clamped together to fix the tab (41) of the soft-pack battery cell (4); and the movable upper die (32) is used to bend the tab (41).

7. The soft-pack battery cell tab bending tool according to claim 6, characterized in that: A boss (35) and a groove (36) are respectively arranged at the upper end of the lower mold (33); the boss (35) cooperates with the fixing plate (34) to clamp the pole lug (41); and the upper mold (32) cooperates with the groove (36) to bend the pole lug (41).

8. The soft-pack battery cell tab bending tool according to claim 6, characterized in that: A guide column (37) is arranged on the tooling base plate (2), and the outer periphery of the guide column (37) is slidably connected to the lower pressing plate (38) through a linear guide sleeve, and the movable end of the linear module (31) is installed with the upper mold (32) and the fixed plate (34) through the lower pressing plate (38).

9. The soft-pack battery cell tab bending tool according to claim 6, characterized in that: A return spring (39) is arranged on the guide column (37), and two ends of the return spring (39) are respectively fixedly connected to the upper end of the tooling bottom plate (2) and the lower end of the lower pressing plate (38).

10. The soft-pack battery cell tab bending tool according to claim 6, characterized in that: A lower mold (33) is arranged at the lower end of the lower pressure plate (38), a support plate (310) is arranged on one side of the lower pressure plate (38), a sliding hole is arranged on the support plate (310), a sliding shaft (311) is slidably connected to the sliding hole, and the upper end of the sliding shaft (311) can be snapped onto the upper end of the support plate (310), a fixing plate (34) is installed at the lower end of the sliding shaft (311), a clamping spring (312) is arranged on the periphery of the sliding shaft (311), and two ends of the clamping spring (312) are respectively connected to the upper end of the fixing plate (34) and the lower end of the support plate (310).

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