Flexible positioning tool for laminated battery cell

Abstract

The utility model discloses a flexible positioning tool for a laminated battery cell, which comprises an annular top plate, an annular bottom plate, an annular bottom plate, a flexible positioning plate, a flexible positioning plate and a flexible positioning plate, and is characterized in that the annular top plate covers the annular bottom plate and the inner space is used for limiting and accommodating the laminated battery cell; the annular bottom plate covers the annular top plate, and the inner space is used for limiting and accommodating the laminated cell; and the multiple flexible assemblies are arranged between the annular top plate and the annular bottom plate and used for forming elastic compression performance between the annular top plate and the annular bottom plate. According to the utility model, the inner space of the annular top plate and the annular bottom plate can be used for effectively positioning and shaping a laminated battery cell, the bad phenomena of dislocation, deviation and the like of the battery cell are prevented, the flexible assembly is arranged, so that the annular top plate and the annular bottom plate of the tool have certain compression space, the battery cell can be effectively subjected to hot pressing, and the production efficiency is improved. In addition, the hot pressboard pressing device is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core processing auxiliary equipment, in particular to a flexible positioning tool for laminated battery cores. Background Art

[0002] In the manufacturing process of laminated battery cells, the laminating machine first stacks the electrodes layer by layer, and then the laminated battery cells are transferred to the hot pressing process for the heat bonding process of the electrodes and the diaphragms, and the multi-layer electrodes of the laminated battery cells are shaped, and then transferred to the subsequent assembly process to finally complete the manufacturing process of the laminated battery cells.

[0003] Normally, since stacked cells are made of stacked electrodes layer by layer, the electrodes are separated from each other. After the cells are stacked, electrode offset or misalignment may easily occur during the transfer or hot pressing process, which ultimately leads to electrode misalignment after hot pressing of the stacked cells, making it impossible to proceed with the subsequent cell assembly process. Utility Model Content

[0004] The main purpose of the utility model is to provide a flexible positioning tool for laminated battery cells that can be applied to a hot pressing process and prevent the battery cells from being misaligned or offset.

[0005] To achieve the above-mentioned purpose, the present invention provides a flexible positioning tool for laminated battery cells, comprising:

[0006] The annular top plate covers the annular bottom plate, and the inner space is used to limit and accommodate the laminated battery cells;

[0007] The annular bottom plate is covered with the annular top plate, and the inner space is used to limit and accommodate the laminated battery cells;

[0008] There are multiple flexible components, which are arranged between the annular top plate and the annular bottom plate and are used to form elastic compression performance between the annular top plate and the annular bottom plate.

[0009] Furthermore, the outer periphery of the annular top plate is provided with a circle of first ribs extending downward, and the outer periphery of the annular bottom plate is provided with a circle of second ribs extending upward, and the first ribs and the second ribs form a limiting fit.

[0010] Furthermore, the inner circumference of the annular top plate is provided with a plurality of first positioning guide plates extending downward, and the inner circumference of the annular bottom plate is provided with a plurality of second positioning guide plates extending upward, and each of the first positioning guide plates and each of the second positioning guide plates are engaged with each other.

[0011] Furthermore, the first positioning guide plate and the second positioning guide plate are both designed with their free ends bent inwards.

[0012] Furthermore, the inner sides of the annular top plate and the annular bottom plate are provided with positioning blocks that cooperate with the laminated battery core at the middle positions of the two tabs of the corresponding laminated battery core.

[0013] Furthermore, the inner sides of the annular top plate and the annular bottom plate are located on both sides of the positioning block and respectively have positioning steps that cooperate with the laminated battery core.

[0014] Furthermore, a plurality of the flexible components are distributed at intervals along the circumference of the annular top plate and the annular bottom plate.

[0015] Furthermore, the flexible component includes a base fixed on the annular bottom plate, a floating block slidably connected to the base, and an elastic member arranged between the base and the floating block, and the floating block is fixed on the annular top plate.

[0016] Furthermore, the base is cylindrical, the floating block is in the shape of a two-stage stepped shaft, an upper cover is fixed to the top of the base, the floating block is plugged into the base and the upper end passes through the upper cover, and the elastic member is located in the base and padded at the bottom of the floating block.

[0017] Furthermore, threaded holes for installation are respectively provided on the bottom wall of the base and the floating block.

[0018] The beneficial effects of the present invention are as follows:

[0019] The utility model can effectively position and shape the laminated battery cells through the inner space of the annular top plate and the annular bottom plate, and prevent the battery cells from being misaligned, offset or other undesirable phenomena. The flexible components provided in the utility model allow the annular top plate and the annular bottom plate of the tooling to have a certain compression space, which can effectively implement hot pressing on the battery cells and avoid hard force damage to the hot pressing plate. In addition, the utility model has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of a flexible positioning tool for laminated battery cells according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 The schematic diagram of the positioning tool shown is a schematic diagram of the state of use of the laminated battery cell installed inside;

[0022] Figure 3 for Figure 1 The structural exploded view of the positioning tool shown;

[0023] Figure 4 for Figure 1 a cross-sectional view of the positioning fixture shown;

[0024] Figure 5 yes Figure 4 A in the enlarged view.

[0025] Description of reference numerals:

[0026] 1. Annular top plate; 11. First rib; 12. First positioning guide plate;

[0027] 2. Annular bottom plate; 21. Second rib; 22. Second positioning guide plate;

[0028] 121. Positioning block; 122. Space for tabs; 123. Positioning step;

[0029] 3. Flexible component; 31. Base; 32. Floating block; 33. Elastic part; 34. Upper cover; 35. Threaded hole.

[0030] 4. Laminated battery cells. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, if there are descriptions of "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "multiple" means more than two. The embodiments described below are only some of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0032] See also Figures 1 to 5 .

[0033] The utility model discloses a flexible positioning tool for laminated battery cells, comprising:

[0034] The annular top plate 1 covers the annular bottom plate 2, and the inner space is used to limit and accommodate the laminated battery core 4;

[0035] The annular bottom plate 2 covers the annular top plate 1, and the inner space is used to limit and accommodate the laminated battery core 4;

[0036] There are multiple flexible components 3 , which are arranged between the annular top plate 1 and the annular bottom plate 2 , and are used to form elastic compression performance between the annular top plate 1 and the annular bottom plate 2 .

[0037] When using the tooling of the present invention for hot pressing, first place the tooling on the hot press processing table, then place the laminated battery core 4 into the inner space of the annular top plate and annular bottom plate of the tooling. When hot pressing the laminated battery core, the hot pressing plate is pressed down to first contact the annular top plate of the tooling (in the uncompressed state, the top surface of the annular top plate is higher than the top surface of the laminated battery core). During the continuous compression process, the flexible components of the tooling are compressed until the hot pressing plate contacts the surface of the laminated battery core. When the hot pressing is completed, the upper hot pressing plate is slowly lifted, and the annular top plate of the tooling slowly rebounds due to the elastic force. Finally, the hot-pressed battery core is manually removed.

[0038] The utility model can effectively position and shape the laminated battery cells through the inner space of the annular top plate and the annular bottom plate, and prevent the battery cells from being misaligned, offset or other undesirable phenomena. The flexible components provided in the utility model allow the annular top plate and the annular bottom plate of the tooling to have a certain compression space, which can effectively implement hot pressing on the battery cells and avoid hard force damage to the hot pressing plate. In addition, the utility model has a simple structure and is easy to operate.

[0039] In one embodiment, the outer periphery of the annular top plate 1 is provided with a first rib 11 extending downward, and the outer periphery of the annular bottom plate 2 is provided with a second rib 21 extending upward. The first rib 11 and the second rib 21 form a limited fit. This design forms a flat box structure with the annular top plate, the first rib, and the annular bottom plate and the second rib. The two are nested together to prevent interference between the annular top plate and the annular bottom plate during compression, and the compression motion paths of the two are limited.

[0040] In one embodiment, the inner circumference of the annular top plate 1 is provided with a plurality of downwardly extending first positioning guide plates 12, and the inner circumference of the annular bottom plate 2 is provided with a plurality of upwardly extending second positioning guide plates 22. Each of the first positioning guide plates 12 and the second positioning guide plates 22 engages with each other. This design improves the positioning and shaping of the laminated cells using the first and second positioning guide plates. The positioning guide plates on the annular top and bottom plates are staggered and dispersed to prevent interference between the positioning guide plates. There is a gap between the bottom of the first positioning guide plate and the annular bottom plate, and between the top of the second positioning guide plate and the annular top plate.

[0041] In one embodiment, the first positioning guide plate 12 and the second positioning guide plate 22 are both designed with their free ends bent inwards. This design can avoid damaging the cell pole pieces during the compression process and can effectively position and shape the pole pieces.

[0042] In one embodiment, the annular top plate 1 and the annular bottom plate 2 each have a positioning block 121 positioned between the two tabs of the corresponding laminated battery core 4. This design allows for tab clearance spaces 122 to be left on either side of the positioning block 121, thereby preventing damage to the tabs (laminated batteries generally have two tabs, making it difficult to squeeze and position them).

[0043] In one embodiment, the inner sides of the annular top plate 1 and the annular bottom plate 2 are provided with positioning steps 123 on either side of the positioning block 121, respectively, for engaging with the laminated battery core 4. This design allows the positioning block and the positioning steps on both sides to position and shape the laminated battery core, ensuring the shaping effect while avoiding damage to the tabs.

[0044] The inner space of the annular top plate 1 and the annular bottom plate 2 matches the shape and size of the laminated battery core 4 .

[0045] In one embodiment, the annular top plate 1 and the annular bottom plate 2 are both made of non-metallic materials to avoid short circuit caused by contact with the battery cells.

[0046] In one embodiment, a plurality of the flexible components 3 are distributed at intervals along the circumference of the annular top plate 1 and the annular bottom plate 2. This design makes the elastic compressive force distribution more uniform and the layout more reasonable.

[0047] In one embodiment, the flexible assembly 3 includes a base 31 fixed to the annular bottom plate 2, a floating block 32 slidably connected to the base 31, and an elastic member 33 disposed between the base 31 and the floating block 32. The floating block 32 is fixed to the annular top plate 1. With this design, when the flexible assembly is subjected to downward pressure from the annular top plate, the floating block moves downward and compresses the elastic member (a spring may be used in a specific implementation). When the downward pressure is removed, the floating block moves upward due to the elastic force of the elastic member until it is restrained by the upper cover of the flexible assembly and cannot move.

[0048] In one embodiment, the base 31 is cylindrical, and the floating block 32 is in the shape of a two-stage stepped shaft. A top cover 34 is fixed to the top of the base 31. The floating block 32 is plugged into the base 31, with its upper end passing through the top cover 34. The elastic member 33 is located within the base 31 and cushioned against the bottom of the floating block 32. This design is simple in structure and easy to manufacture and implement.

[0049] In one embodiment, threaded holes 35 for installation are respectively provided on the bottom wall of the base 31 and the floating block 32. In this design, the base and the floating block can be connected by screws (not shown in the figure). Figure 5The holes corresponding to the threaded holes on the middle annular bottom plate and the annular top plate are used to install screws) and are fastened to the annular bottom plate and the annular top plate, so that the entire flexible component can be fixed, making installation more convenient.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flexible positioning tool for laminated battery cells, characterized in that: include: The annular top plate covers the annular bottom plate, and the inner space is used to limit and accommodate the laminated battery cells; The annular bottom plate is covered with the annular top plate, and the inner space is used to limit and accommodate the laminated battery cells; There are multiple flexible components, which are arranged between the annular top plate and the annular bottom plate and are used to form elastic compression performance between the annular top plate and the annular bottom plate.

2. The flexible positioning tool for laminated battery cells according to claim 1, characterized in that: The outer periphery of the annular top plate is provided with a circle of first ribs extending downward, and the outer periphery of the annular bottom plate is provided with a circle of second ribs extending upward, and the first ribs and the second ribs form a limiting fit.

3. The flexible positioning tool for laminated battery cells according to claim 1, characterized in that: The inner circumference of the annular top plate is provided with a plurality of first positioning guide plates extending downward, and the inner circumference of the annular bottom plate is provided with a plurality of second positioning guide plates extending upward, and each of the first positioning guide plates and each of the second positioning guide plates are engaged with each other.

4. The flexible positioning tool for laminated battery cells according to claim 3, characterized in that: The first positioning guide plate and the second positioning guide plate are both designed with their free ends bent inwards.

5. The flexible positioning tool for laminated battery cells according to any one of claims 1 to 4, characterized in that: The inner sides of the annular top plate and the annular bottom plate are provided with positioning blocks matched with the laminated battery cores at the middle positions of the two tabs of the corresponding laminated battery cores.

6. The flexible positioning tool for laminated battery cells according to claim 5, characterized in that: The inner sides of the annular top plate and the annular bottom plate are located on both sides of the positioning block and respectively have positioning steps that cooperate with the laminated battery core.

7. The flexible positioning tool for laminated battery cells according to any one of claims 1 to 4, characterized in that: A plurality of the flexible components are distributed along the circumference of the annular top plate and the annular bottom plate at intervals.

8. The flexible positioning tool for laminated battery cells according to any one of claims 1 to 4, characterized in that: The flexible component includes a base fixed on the annular bottom plate, a floating block slidably connected to the base, and an elastic member arranged between the base and the floating block, and the floating block is fixed on the annular top plate.

9. The flexible positioning tool for laminated battery cells according to claim 8, characterized in that: The base is cylindrical, the floating block is in the shape of a two-stage stepped shaft, an upper cover is fixed on the top of the base, the floating block is plugged into the base and the upper end passes through the upper cover, and the elastic member is located in the base and padded at the bottom of the floating block.

10. The flexible positioning tool for laminated battery cells according to claim 9, characterized in that: Threaded holes for installation are respectively provided on the bottom wall of the base and the floating block.

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