Battery cell stacking tooling

Abstract

The utility model provides a kind of electric core stacking tool, including mould base, the groove for placing electric core is formed on mould base;Sealing cover, sealing cover is used to cooperate mould base to form the accommodating cavity containing electric core;Pressing plate, pressing plate is set in accommodating cavity and can be driven to move along the stacking direction of multiple electric cores, to compress the electric core of stacking;Vacuum glue injection hole, vacuum glue injection hole is opened in mould base, to be able to glue injection to the side of the multiple electric cores of stacking in accommodating cavity.The multiple electric cores of stacking are placed in the groove of mould base, the electric core after stacking is compressed using adjustable pressing plate to ensure its compactness, vacuum glue injection hole is used to carry out vacuumizing and glue injection processing to accommodating cavity, and the electric core can be effectively avoided that glue liquid penetrates into electric core interlayer and affects stacking thickness and flatness, and the stacking electric core after glue injection effectively avoids the situation that powder falls off edge.

Description

Technical Field

[0001] This utility model relates to the field of solid-state battery technology, and in particular to a cell stacking fixture. Background Technology

[0002] Solid-state battery fabrication mostly employs a single-cell composite approach, stacking multiple individual cells to increase cell capacity. However, mature dedicated stacking equipment is currently lacking, and stacking is generally done manually or with simple tooling. This leads to issues such as non-compact stacking and misalignment of individual cells during the stacking process. Furthermore, the insulation method between electrodes in all-solid-state batteries differs from that in traditional liquid batteries. Traditional liquid batteries use separators for electrode insulation, while solid-state batteries lack edge insulation protection. During stacking and charging / discharging, stress changes in the cells can easily cause edge contact short circuits. Additionally, edge trimming and powder shedding during the stacking process can cause short circuits, posing a safety hazard of internal short circuits within the battery. Utility Model Content

[0003] One of the technical problems that this utility model aims to solve is: how to ensure that multiple single-cell batteries are stacked compactly to prevent misalignment and to prevent short circuits during packaging charging and discharging.

[0004] To solve the above-mentioned technical problems, this utility model provides a battery cell stacking fixture, including: a mold base with a groove for placing battery cells; a sealing cover plate for cooperating with the mold base to form a receiving cavity for accommodating battery cells; a pressure plate disposed in the receiving cavity and capable of being driven to move along the stacking direction of multiple battery cells to press the stacked battery cells; and a vacuum injection hole opened in the mold base to inject adhesive into the sides of the stacked multiple battery cells located in the receiving cavity.

[0005] In some embodiments, the mold base has a slotted cavity with at least two detachably assembled opening and limiting components, which are used to define the position of the battery cell in a plane perpendicular to the stacking direction.

[0006] In some embodiments, the opening limiting component includes a first limiting member and a second limiting member. The first limiting member includes a panel having a plane parallel to the plane where the battery cell is located and a first stop portion disposed on the panel. An insertion slot is provided on the panel. The second limiting member includes an insertion plate that cooperates with the insertion slot and a second stop portion disposed on the insertion plate. The first stop portion and the second stop portion are respectively used to stop different edges of the battery cell.

[0007] In some embodiments, the mold base has a protrusion extending into the groove, and a first stop and a second stop are spaced apart from the protrusion to form a tab placement area for placing the tabs of the battery cell.

[0008] In some embodiments, a vacuum dispensing hole is provided on the protrusion.

[0009] In some embodiments, the bottom of the groove is provided with a circumferentially extending base limiting portion, and the opening limiting component is fixed in the mold base through the base limiting portion.

[0010] In some embodiments, the sealing cover includes a cover body and a cover limiting portion disposed on the cover body that can be fixedly fitted with the groove.

[0011] In some embodiments, the pressure plate is connected to the sealing cover by a spring.

[0012] In some embodiments, a first sealing strip is provided between the mold base and the sealing cover.

[0013] In some embodiments, a second sealing strip is provided between the sealing cover and the flap limiting assembly.

[0014] Through the above technical solution, the battery cell stacking fixture provided by this utility model stacks multiple battery cells in the groove of the mold base. After covering with a sealing cover, the stacked battery cells are pressed with an adjustable pressure plate to ensure their compactness. Then, the cavity is vacuumed and glued through the vacuum glue injection hole. Pressing the battery cells can effectively prevent glue from seeping into the interlayer of the battery cells and affecting the stacking thickness and flatness. At the same time, the stacked battery cells after glue injection effectively prevent the edge powder from falling off, ensuring battery capacity while reducing safety hazards. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an exploded view of the battery cell stacking fixture according to an embodiment of this utility model; Figure 2 This is a cross-sectional schematic diagram of a battery cell stacking fixture in an exploded state; Figure 3 This is a schematic diagram of the structure of the opening and limiting component according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the first limiting member according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the structure of the second limiting member according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the structure of the mold base according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the battery cell according to an embodiment of the present utility model; Figure 8 This is a top view of a mold base with a battery cell according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Mold base; 101. Protrusion; 102. Base limiting part; 2. Sealing cover plate; 201. Cover plate body; 202. Cover plate limiting part; 3. Pressure plate; 4. Vacuum injection hole; 5. Battery cell; 501. Electrode; 6. Opening limiting assembly; 601. First limiting member; 602. Second limiting member; 603. Panel; 604. First stop part; 605. Insertion groove; 606. Insertion plate; 607. Second stop part; 7. Electrode placement area; 8. Spring; 9. First sealing strip; 10. Second sealing strip. Detailed Implementation

[0018] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to exemplarily illustrate the principles of this utility model, but should not be used to limit the scope of this utility model. This utility model can be implemented in many different forms and is not limited to the specific embodiments described herein, but includes all technical solutions falling within the scope of the claims.

[0019] These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0020] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] Furthermore, the terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0022] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0023] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0025] like Figures 1-8 As shown, this utility model provides a battery cell stacking fixture, including: a mold base 1, on which a groove for placing battery cells 5 is formed; a sealing cover plate 2, which cooperates with the mold base 1 to form a receiving cavity for accommodating battery cells 5; a pressure plate 3, which is disposed in the receiving cavity and can be driven to move along the stacking direction of multiple battery cells 5 to press the stacked battery cells 5; and a vacuum injection hole 4, which is opened in the mold base 1 to inject glue into the sides of the stacked multiple battery cells 5 located in the receiving cavity.

[0026] Specifically, under normal circumstances, to facilitate the placement of the battery cell 5, the groove is set on the top of the mold base 1. When using the battery cell stacking fixture, multiple battery cells 5 are first stacked in the groove of the mold base 1. The sealing cover 2 is placed on the top of the mold base 1 to close the groove and form a receiving cavity. The driving pressure plate 3 moves along the stacking direction of the battery cells 5 to press the stacked battery cells 5 tightly, so as to avoid the glue seeping into the interlayer of the two battery cells 5 during the glue injection process, which would cause the battery thickness to increase or the surface to become uneven. The vacuum glue injection hole 4 set on the mold base 1 is the only communication channel between the receiving cavity and the outside. The operator connects the vacuum glue injection equipment (such as a vacuum glue injection machine) to the receiving cavity through the vacuum glue injection hole 4, draws out the air to form a negative pressure environment in the receiving cavity, and then injects glue (such as epoxy resin) into the receiving cavity. The glue is attracted to the side of the stacked battery cells 5 under the influence of negative pressure. After the glue has cured, the sealing cover 2 is opened and the stacked battery cells with the glue protective layer are taken out. To ensure effective clamping, the pressure plate 3 is a plate-shaped structure with the same shape as and parallel to the battery cell 5. The pressure plate 3 can be movably mounted on the mold base 1 or the sealing cover plate 2 along the stacking direction using common linear drive components such as electric push rods or mechanical screws. Driven to move along the stacking direction, the pressure plate 3 can provide appropriate clamping force for battery cells 5 with different stacking thicknesses. By clamping the stacked battery cells 5 with the pressure plate 3, it keeps them compact and prevents adhesive from seeping into the interlayer spaces of the battery cells 5. Adhesive injection forms a protective adhesive layer on the sides of the stacked battery cells to improve their side mechanical strength, prevent edge contact short circuits, and effectively reduce the risk of short circuits while ensuring battery capacity, thus improving product performance.

[0027] like Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, the groove of the mold base 1 is provided with at least two parts that are detachably assembled to form a flap limiting component 6, which is used to limit the position of the battery cell 5 in a plane perpendicular to the stacking direction.

[0028] Specifically, before stacking the battery cells 5, the assembled flap-opening limiting assembly 6 is placed in the groove of the mold base 1. The flap-opening limiting assembly 6 limits the edge of the battery cell 5 to restrict its position in a plane perpendicular to the stacking direction, preventing stacking misalignment. After the adhesive has cured and the sealing cover 2 is removed, the flap-opening limiting assembly 6 is disassembled to facilitate the removal of the stacked battery cells with the adhesive protective layer, minimizing damage to the adhesive protective layer. The components of the flap-opening limiting assembly 6 can be detachably connected through snaps or slots to facilitate the unloading of the battery cell 5.

[0029] like Figure 3 , Figure 4 and Figure 5As shown, in some embodiments, the opening limiting component 6 includes a first limiting member 601 and a second limiting member 602. The first limiting member 601 includes a panel 603 with a plane parallel to the plane where the battery cell 5 is located and a first stop portion 604 disposed on the panel 603. An insertion groove 605 is provided on the panel 603. The second limiting member 602 includes an insertion plate 606 that cooperates with the insertion groove 605 and a second stop portion 607 disposed on the insertion plate 606. The first stop portion 604 and the second stop portion 607 are respectively used to stop different edges of the battery cell 5.

[0030] Specifically, the panel 603 of the first limiting member 601 is used for stacking the discharge core 5, and the side of the panel 603 is provided with an insertion groove 605 parallel to the plate body (e.g., Figure 4 As shown), the second limiting member 602 is connected to the first limiting member 601 through the insertion plate 606 and the insertion slot 605 to form the assembled flap limiting assembly 6 (as shown). Figure 3 (As shown). The first stop portion 604 and the second stop portion 607 are respectively vertically disposed on the panel 603 and the insertion plate 606, and are used to stop different edges of the battery cell 5. In the combined state of the flap limiting assembly 6, they form a stop portion that extends continuously along the circumference of the battery cell 5. The upper surface area of ​​the panel 603 for stacking the battery cell 5 can be equal to or slightly larger than the area of ​​the battery cell 5, so that when the vacuum dispensing equipment is evacuated, the edges of the stacked battery cells can form gaps with the first stop portion 604 and the second stop portion 607, which facilitates dispensing and forms a protective adhesive layer to protect the edges of the battery cells. In other embodiments, the flap limiting assembly 6 may also include other numbers of detachably connected limiting members.

[0031] like Figure 1 , Figure 3 , Figure 6 and Figure 8 As shown, in some embodiments, the mold base 1 has a protrusion 101 extending into the groove, and a first stop 604 and a second stop 607 are spaced apart from the protrusion 101 to form a tab placement area 7 for placing the tab 501 of the battery cell 5.

[0032] Specifically, the first stop portion 604 and the second stop portion 607 form a stop portion that extends continuously but is not closed along the circumference of the battery cell 5, and the panel 603 is also provided with a groove adapted to the protrusion 101, wherein the two ends of the stop portion are spaced apart from the groove to form a tab placement area 7 (e.g. Figure 3 As shown), the protrusion 101 is embedded in the groove of the panel 603, and two tab placement areas 7 are respectively provided at intervals at both ends of the stop portion to form two tab placement areas 7. When stacked, the two tabs 501 of the battery cell 5 are respectively placed in the two tab placement areas 7 (as shown). Figure 8(As shown). In other embodiments, the specific positions and dimensions of the groove, first stop 604, second stop 607, and protrusion 101 of the panel 603 can be appropriately adjusted according to the positions of different types of battery cell tabs to improve the adaptability of the tooling.

[0033] like Figure 1 and Figure 6 As shown, in some embodiments, the vacuum injection hole 4 is provided on the protrusion 101.

[0034] Specifically, the protrusion 101, together with the first stop 604 and the second stop 607, achieves circumferential positioning of the battery cell 5. After the adhesive passes through the vacuum injection hole 4 provided in the protrusion 101, it can directly contact the edge of the battery cell 5, effectively improving the injection efficiency.

[0035] like Figure 2 and Figure 6 As shown, in some embodiments, the bottom of the groove is provided with a circumferentially extending base limiting part 102, and the opening limiting component 6 is embedded in the mold base 1 through the base limiting part 102.

[0036] Specifically, after the opening and limiting component 6 is assembled, it is placed into the mold base 1 along the stacking direction of the battery cell 5. The base limiting part 102 is distributed circumferentially on the outer peripheral edge of the opening and limiting component 6 to limit the relative position of the opening and limiting component 6 in the groove, so as to ensure the smooth progress of the stacking of battery cells and vacuum injection operation.

[0037] like Figure 1 and Figure 2 As shown, in some embodiments, the sealing cover 2 includes a cover body 201 and a cover limiting part 202 disposed on the cover body 201 and capable of being fitted into the groove.

[0038] Specifically, the cover plate limiting part 202 is vertically disposed on the lower surface of the cover plate body 201, and has the same projected size as the base limiting part 102 in the stacking direction, and has a notch adapted to the protrusion 101. The sealing cover plate 2 is placed on the mold base 1 along the stacking direction, and the cover plate limiting part 202 is inserted into the groove, with its bottom surface abutting against the top surface of the base limiting part 102 to maintain a seal while restricting the relative movement of the sealing cover plate 2 and the mold base 1.

[0039] like Figure 2 As shown, in some embodiments, the pressure plate 3 is connected to the sealing cover plate 2 by a spring 8.

[0040] Specifically, the pressure plate 3 is connected to the lower surface of the cover plate body 201 by multiple springs 8 arranged in parallel. After multiple battery cells 5 are stacked, during the process of placing the sealing cover plate 2 along the stacking direction, the pressure plate 3 moves upward under the action of the stacked battery cells, causing the springs 8 to be compressed to provide clamping force. In other embodiments, the clamping force can be adjusted by adjusting the stiffness or number of springs 8 to adapt to battery cells 5 of different specifications, thereby improving the adaptability of the tooling.

[0041] like Figure 1 and Figure 2 As shown, in some embodiments, a first sealing strip 9 is provided between the mold base 1 and the sealing cover plate 2. Specifically, the shape of the first sealing strip 9 is the same as the top surface shape of the base limiting part 102 and it is disposed between the top surface of the base limiting part 102 and the bottom surface of the cover plate limiting part 202 to enhance the sealing effect of the cell stacking fixture. The first sealing strip 9 can be made of rubber.

[0042] like Figure 1 and Figure 2 As shown, in some embodiments, a second sealing strip 10 is provided between the sealing cover 2 and the opening limiting assembly 6. Specifically, the shape of the second sealing strip 10 is the same as the projection shape of the first stop 604, the second stop 607, the tab placement area 7, and the protrusion 101 in the stacking direction, and it is disposed between the cover body 201 and the protrusion 101 and the opening limiting assembly 6 to enhance the sealing effect of the cell stacking fixture. The second sealing strip 10 can be made of rubber.

[0043] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions described herein based on the above description.

[0044] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A battery cell stacking fixture, characterized in that, include: A mold base (1) is provided, on which a groove for placing the battery cell (5) is formed; A sealing cover (2) is used to cooperate with the mold base (1) to form a receiving cavity for accommodating the battery cell (5); Pressure plate (3), which is disposed in the receiving cavity and can be driven to move along the stacking direction of the plurality of cells (5) to press the stacked cells (5). Vacuum injection hole (4), the vacuum injection hole (4) is opened in the mold base (1) to inject glue into the side of the stacked multiple cells (5) located in the receiving cavity.

2. The cell stacking fixture according to claim 1, characterized in that, The mold base (1) has a slot in which at least two parts are detachably assembled to form a flap limiting component (6), which is used to limit the position of the battery cell (5) in a plane perpendicular to the stacking direction.

3. The cell stacking fixture according to claim 2, characterized in that, The opening limiting component (6) includes a first limiting member (601) and a second limiting member (602). The first limiting member (601) includes a panel (603) parallel to the plane of the battery cell (5) and a first stop (604) on the panel (603). An insertion slot (605) is provided on the panel (603). The second limiting member (602) includes an insertion plate (606) that cooperates with the insertion slot (605) and a second stop (607) on the insertion plate (606). The first stop (604) and the second stop (607) are respectively used to stop different edges of the battery cell (5).

4. The cell stacking fixture according to claim 3, characterized in that, The mold base (1) has a protrusion (101) extending into the groove. The first stop (604) and the second stop (607) are spaced apart from the protrusion (101) to form a tab placement area (7) for placing the tab (501) of the battery cell (5).

5. The cell stacking fixture according to claim 4, characterized in that, The vacuum injection hole (4) is provided on the protrusion (101).

6. The cell stacking fixture according to claim 2, characterized in that, The bottom of the groove is provided with a circumferentially extending base limiting part (102), and the opening limiting component (6) is embedded in the mold base (1) through the base limiting part (102).

7. The cell stacking fixture according to claim 1, characterized in that, The sealing cover (2) includes a cover body (201) and a cover limiting part (202) disposed on the cover body (201) and capable of being fitted into the groove.

8. The cell stacking fixture according to claim 1, characterized in that, The pressure plate (3) is connected to the sealing cover plate (2) by a spring (8).

9. The cell stacking fixture according to claim 1, characterized in that, A first sealing strip (9) is provided between the mold base (1) and the sealing cover plate (2).

10. The cell stacking fixture according to claim 2, characterized in that, A second sealing strip (10) is provided between the sealing cover plate (2) and the opening flap limiting component (6).

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