Battery pack stacking tooling device

Abstract

The application relates to the technical field of battery preparation, in particular to a battery stack stacking tool device, which comprises a containing box body used for containing batteries stacked in reverse order, a limiting plate of the containing box body is provided with a plurality of first limiting holes arranged along a first direction and a plurality of second limiting holes arranged along a second direction, and the first limiting holes and the second limiting holes are staggered along a third direction. A single first limiting hole can span two adjacent batteries, and a single second limiting hole can span two adjacent batteries. When the tab is bent, the first limiting hole and the second limiting hole play a limiting role, so that the tab therein can only be bent towards the hole, and cannot be bent towards the outside of the hole, thereby effectively playing a bending foolproof role. In summary, the application avoids the occurrence of short circuit, sparking and other conditions caused by the wrong bending direction of the battery tab; by limiting the bending direction of the battery tab, the confirmation time required when the tab is bent is reduced, and the production efficiency is significantly improved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, specifically to a battery pack stacking tooling device. Background Technology

[0002] Currently, most sodium-ion pouch batteries are assembled manually using stacking fixtures. Conventional fixtures use a base plate, side plates, and a front baffle to limit the batteries on three sides, allowing them to be stacked sequentially. After stacking, the outermost batteries at both ends need to have their positive and negative tabs bent outwards, while the positive and negative tabs of the remaining adjacent batteries are folded in half, thus connecting the stacked batteries in series.

[0003] In practice, to meet the electrical performance requirements of battery packs, adjacent batteries are typically stacked in reverse order, meaning the positive and negative terminals of the tabs on adjacent batteries are opposite. For example, the bottom battery has a left-positive and right-negative tab, the second battery above it has a left-negative and right-positive tab, and so on. However, a key drawback of existing tooling is that the tabs are prone to bending in the wrong direction during the bending process, which can lead to safety hazards such as short circuits in the battery pack. Therefore, how to solve the problem of incorrect tab bending direction after battery stacking is a technical problem that needs to be addressed in this field. Utility Model Content

[0004] In view of this, this application provides a battery pack stacking fixture that can prevent incorrect bending direction of the tabs after battery stacking, effectively preventing bending errors.

[0005] In a first aspect, this application provides a battery pack stacking fixture, comprising: a receiving box, including a cavity for receiving stacked batteries; a limiting plate of the receiving box is provided with: a plurality of first limiting holes arranged along a first direction and a plurality of second limiting holes arranged along a second direction, the positive and negative tabs of the batteries facing the limiting plate and extending from the first and second limiting holes, the first and second limiting holes being used to limit the tabs from folding in a target direction; adjacent first limiting holes are spaced apart by a first preset distance, adjacent second limiting holes are spaced apart by a second preset distance, the first and second limiting holes are staggered along a third direction and intersected along the battery stacking direction; wherein, the first direction is parallel to the second direction, and the third direction is different from the first direction.

[0006] In conjunction with the first aspect, in one possible implementation, both the first preset distance and the second preset distance are less than the thickness of the battery, and multiple batteries are stacked vertically inside the cavity, with the third-direction tabs of adjacent batteries having opposite polarities.

[0007] In conjunction with the first aspect, in one possible implementation, the first plate body on the limiting plate between adjacent first limiting holes has a first projection along the first direction between the upper and lower edges corresponding to the second limiting holes; the second plate body on the limiting plate between adjacent second limiting holes has a second projection along the first direction between the upper and lower edges corresponding to the second limiting holes.

[0008] In conjunction with the first aspect, in one possible implementation, the distance between the upper / lower edge of the first limiting hole and the nearest electrode tab is any value between 0 and 1 times the electrode tab thickness; the distance between the upper / lower edge of the second limiting hole and the nearest electrode tab is any value between 0 and 1 times the electrode tab thickness.

[0009] In conjunction with the first aspect, in one possible implementation, the first limiting hole at the bottom end in the first direction extends to the bottom edge of the limiting plate, and the first limiting hole at the top end in the first direction extends to the top edge of the limiting plate.

[0010] In conjunction with the first aspect, in one possible implementation, the second limiting hole at the bottom end in the second direction extends to the bottom edge of the limiting plate.

[0011] In conjunction with the first aspect, in one possible implementation, the shortest distance between the first limiting hole and the second limiting hole is less than the horizontal distance between the positive and negative tabs of the battery.

[0012] In conjunction with the first aspect, in one possible implementation, the housing includes: a front baffle with a hollow area, a limiting plate embedded in the hollow area, and the limiting plate being detachably connected to the front baffle.

[0013] In conjunction with the first aspect, in one possible implementation, the limiting plate is provided with a connecting ear, the front baffle is provided with a groove corresponding to the connecting ear, the connecting ear is embedded in the groove and fixed by a first connector.

[0014] In conjunction with the first aspect, in one possible implementation, the housing further includes a base plate, and the front baffle is fixed to the edge of the base plate by a second connector.

[0015] In conjunction with the first aspect, in one possible implementation, the housing further includes a side panel, which is fixed to the edge of the base plate by a third connector, and the side panel has side panel holes.

[0016] In this application, multiple batteries are stacked vertically within the cavity. The first and second preset distances are both less than the battery thickness, allowing a single first limiting hole and a single second limiting hole to span two adjacent batteries. The tabs of adjacent batteries are opposite in polarity. The positive and negative tabs of the batteries face the limiting plate and extend from the first and second limiting holes. Because the first and second limiting holes are offset along a third direction, the tabs in the first and second limiting holes have opposite polarities. When bending the tabs, the first and second limiting holes act as limiters, ensuring that the tabs can only be bent inwards and not outwards, effectively preventing incorrect bending. In summary, this application avoids short circuits and sparking caused by incorrect bending direction of the battery tabs, effectively reducing safety risks during battery assembly. By limiting the bending direction of the battery tabs, the confirmation time required for bending tabs is reduced, significantly improving production efficiency and effectively reducing production costs. Attached Figure Description

[0017] Figure 1 The diagram shown is a structural schematic of a battery pack stacking fixture provided in an embodiment of this application.

[0018] Figure 2 The diagram shows a battery stacking fixture containing batteries.

[0019] Figure 3 The diagram shows the correspondence between the holes in the front baffle and the battery.

[0020] Figure 4 The diagram shown is a schematic of the limiting plate.

[0021] Figure 5 The diagram shown is a structural schematic of the front baffle.

[0022] Figure 6 The diagram shown is a structural schematic of the base plate.

[0023] Figure 7 The diagram shown is a structural schematic of the side plate. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] Currently, most sodium-ion pouch batteries are assembled manually using stacking fixtures. Conventional fixtures use a base plate, side plates, and a front baffle to limit the batteries on three sides, allowing them to be stacked sequentially. After stacking, the outermost batteries at both ends need to have their positive and negative tabs bent outwards, while the positive and negative tabs of the remaining adjacent batteries are folded in half, thus connecting the stacked batteries in series.

[0026] In practice, to meet the electrical performance requirements of battery packs, adjacent batteries are typically stacked in reverse order, meaning the positive and negative terminals of the tabs on adjacent batteries are opposite. For example, the bottom battery has a left-positive and right-negative tab, the second battery above it has a left-negative and right-positive tab, and so on. However, a key drawback of existing tooling is that the tabs are prone to bending in the wrong direction during the bending process, which can lead to safety hazards such as short circuits in the battery pack. Therefore, how to solve the problem of incorrect tab bending direction after battery stacking is a technical problem that needs to be addressed in this field.

[0027] In view of this, this application provides a battery pack stacking fixture that can prevent incorrect bending direction of the tabs after battery stacking, effectively preventing bending errors.

[0028] An exemplary battery pack stacking fixture is shown below: Figure 1 The diagram shown is a structural schematic of a battery pack stacking fixture provided in an embodiment of this application. Figure 2 The diagram shows a battery stacking fixture containing batteries. This application provides a battery stacking fixture, in one embodiment, as shown... Figure 1 and Figure 2 As shown, the battery stacking fixture includes a housing 1, which includes a cavity for accommodating stacked batteries 2. The housing 1 has a limiting plate 101 with multiple first limiting holes 1011 arranged along a first direction and multiple second limiting holes 1012 arranged along a second direction. The positive electrode tab 201 and negative electrode tab 202 of the battery 2 face the limiting plate 101 and extend from the first limiting holes 1011 and the second limiting holes 1012. The first limiting holes 1011 and the second limiting holes 1012 are used to limit the tabs from folding in a target direction. Figure 1 and Figure 2The housing 1 is placed vertically, corresponding to the vertical stacking of batteries 2. The first and second directions are both vertical. Adjacent first limiting holes 1011 are spaced a first preset distance apart, which is the vertical distance between the nearest horizontal edges of adjacent first limiting holes 1011, i.e., the vertical distance between the lower edge of the upper first limiting hole 1011 and the upper edge of the lower first limiting hole 1011. Adjacent second limiting holes 1012 are spaced a second preset distance apart, which is the vertical distance between the nearest horizontal edges of adjacent second limiting holes 1012, i.e., the vertical distance between the lower edge of the upper second limiting hole 1012 and the upper edge of the lower second limiting hole 1012. The first limiting holes 1011 and second limiting holes 1012 are staggered along a third direction and intersect along the battery 2 stacking direction. This third direction is different from the first direction. Figure 1 and Figure 2 In the example, the third direction is horizontal.

[0029] In this embodiment, multiple batteries 2 are stacked vertically within the cavity. The first and second preset distances are both less than the thickness of the battery 2, allowing a single first limiting hole 1011 to span two adjacent batteries 2, and a single second limiting hole 1012 to span two adjacent batteries 2. Adjacent batteries 2 are stacked in opposite directions, meaning the positive and negative terminals of the third-direction tabs of adjacent batteries 2 are opposite. For example, the bottom battery 2 has left positive and right negative terminals, the second battery 2 from the bottom has left negative and right positive terminals, the third battery 2 from the bottom has left positive and right negative terminals, and so on. The positive tab 201 and negative tab 202 of battery 2 extend from the limiting plate 101 and from the first limiting hole 1011 and the second limiting hole 1012. Since the first limiting hole 1011 and the second limiting hole 1012 are offset along a third direction, the tabs in the first limiting hole 1011 have opposite polarities, and the tabs in the second limiting hole 1012 have opposite polarities. When bending the tabs, the first limiting hole 1011 and the second limiting hole 1012 act as limiting holes, ensuring that the tabs can only be bent inwards and not outwards, thus effectively preventing bending errors. In summary, this embodiment avoids short circuits and sparking caused by incorrect bending direction of the battery tabs, effectively reducing safety risks during battery assembly; by limiting the bending direction of the battery tabs, the confirmation time required when bending the tabs is reduced, significantly improving production efficiency and effectively reducing production costs.

[0030] Figure 3 The diagram shows the corresponding positions of the front bezel holes and the battery. Specifically, as shown... Figure 3As shown, the outer contour of battery 2 is marked with a dashed box. Based on the premise that the first limiting hole 1011 and the second limiting hole 1012 are horizontally staggered, during stacking, the positive electrode tab 201 of the bottom battery 2 is located in the bottom second limiting hole 1012. The limiting and foolproof function of the second limiting hole 1012 ensures that the positive electrode tab 201 can only be bent downwards. The negative electrode tab 202 of the bottom battery 2 and the positive electrode tab 201 of the second layer battery 2 are located in the bottom first limiting hole 1011. The limiting and foolproof function of the first limiting hole 1011 ensures that the negative electrode tab 202 and the positive electrode tab 201 can only be bent towards each other and cannot be bent in opposite directions, effectively preventing incorrect bending direction. Figure 3 As shown, the negative electrode tab 202 of the second layer battery 2 and the positive electrode tab 201 of the third layer battery 2 are located in the second limiting hole 1012. The limiting hole 1012 prevents the positive electrode tab 201 and the negative electrode tab 202 from bending towards each other, and prevents them from bending away from each other. The negative electrode tab 202 of the third layer battery 2 and the positive electrode tab 201 of the fourth layer battery 2 are located in the second limiting hole 1011. The limiting hole 1011 prevents the negative electrode tab 202 and the positive electrode tab 201 from bending towards each other, and prevents them from bending away from each other, effectively preventing incorrect bending direction. Similarly, except for the two end batteries 2, the tabs of each other battery 2 are bent relative to the tabs of the two adjacent batteries 2 above and below, forming a series battery pack.

[0031] In one embodiment, such as Figure 1 , 2 As shown in Figure 3, the first plate body on the limiting plate 101 between adjacent first limiting holes 1011 has its first projection along the first direction located between the upper and lower edges of the corresponding second limiting hole 1012; the second plate body on the limiting plate 101 between adjacent second limiting holes 1012 has its second projection along the first direction located between the upper and lower edges of the second limiting hole 1012. That is, the first preset distance is less than the vertical dimension of the second limiting hole 1012, and the second preset distance is less than the vertical dimension of the first limiting hole 1011. This embodiment ensures that the first limiting hole 1011 and the second limiting hole 1012 are horizontally staggered by a sufficiently large space, and also ensures that the space between the first limiting hole 1011 and the second limiting hole 1012 is sufficiently large so that each positive electrode tab 201 and negative electrode tab 202 can extend from the first limiting hole 1011 and the second limiting hole 1012, and can play an effective limiting and error-proof role.

[0032] Specifically, in one embodiment, such as Figure 3As shown, the distance between the upper / lower edge of the first limiting hole 1011 and the nearest tab is any value between 0 and 1 times the tab thickness, and the distance between the upper / lower edge of the second limiting hole 1012 and the nearest tab is any value between 0 and 1 times the tab thickness. This embodiment ensures that the first limiting hole 1011 and the tab are sufficiently close, and that the second limiting hole 1012 and the tab are sufficiently close, further ensuring that the tab can only bend inwards and cannot bend outwards, thus improving the limiting and error-proofing effect.

[0033] In one embodiment, such as Figure 3 As shown, the first limiting hole 1011 at the bottom end in the first direction extends to the bottom edge of the limiting plate 101, and the first limiting hole 1011 at the top end in the first direction extends to the top edge of the limiting plate 101, thereby improving the space utilization of the housing 1. The batteries 2 can be stacked from the bottom position to the top position. The first limiting hole 1011 extending to the bottom edge accommodates the tabs of the bottom layer battery 2 and the tabs of the second layer battery 2.

[0034] In one embodiment, such as Figure 3 As shown, the second limiting hole 1012 at the bottom end in the second direction extends to the bottom edge of the limiting plate 101. While ensuring that the first limiting hole 1011 and the second limiting hole 1012 are horizontally offset, the space utilization rate of the housing 1 is improved, allowing the batteries 2 to be stacked from the bottom to the top. Since the second limiting hole 1012 and the first limiting hole 1011 are horizontally offset, if the bottom first limiting hole 1011 accommodates both tabs of the bottom battery 2 and the two layers of batteries 2, then the bottom second limiting hole 1012 must only accommodate one tab of the bottom battery 2, which is bent downwards to connect to the power supply circuit.

[0035] In one embodiment, such as Figure 3 As shown, the shortest distance between the first limiting hole 1011 and the second limiting hole 1012 is less than the horizontal distance between the positive and negative tabs of the battery 2, so as to ensure that the positive tab 201 and the negative tab 202 of a single battery 2 can be inserted into the first limiting hole 1011 and the second limiting hole 1012 respectively.

[0036] Figure 4 The diagram shown is a structural schematic of the limiting plate. In one embodiment, as... Figure 1 and Figure 4As shown, the housing 1 includes a front baffle 102 with a hollow region 1021. A limiting plate 101 is embedded in the hollow region 1021 and is detachably connected to the front baffle 102. In this embodiment, the front baffle 102 is detachable, allowing for the installation of various parameters and types of front baffles 102 to accommodate batteries 22 of various sizes. These various parameters and types of front baffles 102 correspond to various sizes of first limiting holes 1011 and second limiting holes 1012, as well as various first preset distances and second preset distances.

[0037] Figure 5 The diagram shown is a structural schematic of the front baffle. In one embodiment, as... Figure 1 , 3 As shown in Figures 4 and 5, the limiting plate 101 is provided with a connecting ear 1013, and the front baffle 102 is provided with a groove 1022 corresponding to the connecting ear 1013. The connecting ear 1013 is embedded in the groove 1022 and fixed by a first connector. In this embodiment, the positioning of the connecting ear 1013 by the groove 1022 helps to fix and position the limiting plate 101. Specifically, the first connector can be a bolt. The groove 1022 is provided with a groove screw hole 10221, and the connecting ear 1013 is provided with a connecting ear fixing hole 10131. The first connector is inserted into the connecting ear fixing hole 10131 and connected to the groove screw hole 10221. Specifically, the groove screw hole 10221 is an M4 threaded hole, which is fixed to the connecting ear fixing hole 10131 by an M4x8 pan head screw.

[0038] Figure 6 The diagram shows a schematic representation of the base plate. In one embodiment, as shown... Figure 1 , 5 As shown in Figure 6, the housing 1 also includes a base plate 103, and a front baffle 102 is fixed to the edge of the base plate 103 by a second connector. In this embodiment, the base plate 103 and the front baffle 102 are mutually detachable, allowing for the replacement of front baffles 102 with various parameter sizes. Specifically, the second connector can be a bolt. The base plate 103 has a first base plate screw hole 1031 on its side end face corresponding to the front baffle 102, and the front baffle 102 has a first countersunk hole 1023. The second connector is inserted into and connected to the first base plate screw hole 1031 through the first countersunk hole 1023. Specifically, the first base plate screw hole 1031 is an M5 threaded hole, which is fixed to the first countersunk hole 1023 by an M5x10 hexagon socket head cap screw.

[0039] In one embodiment, such as Figure 1 and 7As shown, the housing 1 also includes a side plate 104, which is fixed to the edge of the base plate 103 by a third connector. The side plate 104 has a side plate hole 1041. In this embodiment, the side plate 104 can limit the battery 2 from the side, and the side plate hole 1041 can provide heat dissipation and visualization of the stacked batteries 2. Specifically, the third connector can be a bolt. The side plate 104 has a second countersunk hole 1042, and the base plate 103 has a second base plate screw hole 1032 on the side end face corresponding to the side plate 104. The second countersunk hole 1042 and the second base plate screw hole 1032 are aligned with each other and connected by the third connector. Specifically, the second base plate screw hole 1032 is an M5 threaded hole, which is fixed to the second countersunk hole 1042 by an M5x10 hexagon socket head cap screw.

[0040] Figure 7 The diagram shown is a structural schematic of the side panel. In some embodiments, such as... Figure 5 and 7 As shown, the side plate 104 has a side plate screw hole 1043 on its side end face, and the front baffle 102 also has a third countersunk hole 1024. The third countersunk hole 1024 and the side plate screw hole 1043 are aligned with each other and connected by bolts, further strengthening the connection between the front baffle 102 and the side plate 104. Specifically, the side plate screw hole 1043 is an M5 threaded hole, which is fixed to the third countersunk hole 1024 by an M5x10 socket head cap screw.

[0041] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0042] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0043] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0044] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features of the present invention.

[0045] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery pack stacking fixture, characterized in that, include: The housing (1) includes a cavity for accommodating stacked batteries (2); The limiting plate (101) of the housing (1) is provided with a plurality of first limiting holes (1011) arranged along a first direction and a plurality of second limiting holes (1012) arranged along a second direction. The positive electrode tab (201) and negative electrode tab (202) of the battery (2) face the limiting plate (101) and extend from the first limiting holes (1011) and the second limiting holes (1012). The first limiting holes (1011) and the second limiting holes (1012) are used to limit the electrode tabs from folding in the target direction. The adjacent first limiting holes (1011) are separated by a first preset distance, and the adjacent second limiting holes (1012) are separated by a second preset distance. The first limiting holes (1011) and the second limiting holes (1012) are staggered along a third direction and interlaced along the stacking direction of the battery (2). Wherein, the first direction is parallel to the second direction, and the third direction is different from the first direction.

2. The battery pack stacking fixture according to claim 1, characterized in that, Both the first preset distance and the second preset distance are less than the thickness of the battery (2). Multiple batteries (2) are stacked vertically inside the cavity, and the third-direction tabs of adjacent batteries (2) are opposite in polarity.

3. The battery pack stacking fixture according to claim 1, characterized in that, The first plate body on the limiting plate (101) between adjacent first limiting holes (1011) has a first projection along the first direction between the upper and lower edges corresponding to the second limiting hole (1012); The second plate body on the limiting plate (101) between the adjacent second limiting holes (1012) has a second projection along the first direction between the upper and lower edges of the corresponding second limiting holes (1012).

4. The battery pack stacking fixture according to claim 3, characterized in that, The distance between the upper / lower edge of the first limiting hole (1011) and the nearest electrode tab is any value between 0 and 1 times the thickness of the electrode tab; The distance between the upper / lower edge of the second limiting hole (1012) and the nearest electrode tab is any value between 0 and 1 times the electrode tab thickness.

5. The battery pack stacking fixture according to claim 1, characterized in that, The first limiting hole (1011) at the bottom end in the first direction extends to the bottom edge of the limiting plate (101), and the first limiting hole (1011) at the top end in the first direction extends to the top edge of the limiting plate (101). The second limiting hole (1012) at the bottom end in the second direction extends to the bottom edge of the limiting plate (101).

6. The battery pack stacking fixture according to claim 1, characterized in that, The shortest distance between the first limiting hole (1011) and the second limiting hole (1012) is less than the horizontal distance between the positive and negative tabs of the battery (2).

7. The battery pack stacking fixture according to claim 1, characterized in that, The housing (1) includes: The front baffle (102) has a hollow area (1021), and the limiting plate (101) is embedded in the hollow area (1021). The limiting plate (101) is detachably connected to the front baffle (102).

8. The battery pack stacking fixture according to claim 7, characterized in that, The limiting plate (101) is provided with a connecting ear (1013), and the front baffle (102) is provided with a groove (1022) corresponding to the connecting ear (1013). The connecting ear (1013) is embedded in the groove (1022) and fixed by the first connector.

9. The battery pack stacking fixture according to claim 7, characterized in that, The housing (1) also includes: The base plate (103) and the front baffle (102) are fixed to the edge of the base plate (103) by a second connector.

10. The battery pack stacking fixture according to claim 9, characterized in that, The housing (1) also includes: The side plate (104) is fixed to the edge of the base plate (103) by a third connector, and the side plate (104) is provided with side plate holes (1041).

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