Battery cell stacking device and battery production equipment
By compressing and deforming the elastic element in the cell stacking device, the cells are tightly bonded, solving the problem of insufficient cell alignment and improving the welding effect and cell safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-03-13
AI Technical Summary
In existing technologies, it is difficult to ensure that all cells are precisely aligned when stacking cells, which can lead to gaps during welding, affecting battery performance and potentially damaging the cells.
A cell stacking device including a base, a first clamping member, a second clamping member, and multiple elastic members is adopted. The cells are tightly fitted by the compression deformation of the elastic members, eliminating length tolerances and ensuring cell alignment.
This improves the alignment of the battery cells, avoids gap issues during welding, and enhances the welding effect and safety of the battery cells.
Smart Images
Figure CN223993271U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery cell module assembly technology, specifically to a battery cell stacking device and battery production equipment. Background Technology
[0002] When stacking battery packs, such as LCTP battery packs, it is required that the sides of the cells closest to the cell BIC be precisely aligned after the cells are stacked into modules. The BIC is responsible for monitoring critical information such as battery voltage and temperature, and precise alignment is crucial to ensuring the accuracy and stability of signal transmission. If not all cells are aligned with the BIC side, gaps will inevitably appear between the connectors and the cell terminals during subsequent soldering, leading to solder joint defects and affecting battery performance.
[0003] Furthermore, due to manufacturing tolerances in the length of different battery cells, the cell alignment methods in related technologies cannot guarantee that all cells are aligned, and the problem of subsequent welding defects still exists, affecting battery performance. Moreover, the alignment methods in related technologies also have the problem of damaging the battery cells. Utility Model Content
[0004] This utility model aims to at least partially solve one of the technical problems in the related art.
[0005] Therefore, embodiments of this utility model propose a cell stacking device that can improve the alignment of the cells.
[0006] An embodiment of this utility model also proposes a battery production device.
[0007] The battery cell stacking device of this utility model embodiment includes a base, a first clamping member, a second clamping member, and a plurality of elastic members. The first clamping member and the second clamping member are disposed on the base and spaced apart along a first direction. At least one of the first clamping member and the second clamping member is movable along the first direction to move closer to and further away from the other of the first clamping member and the second clamping member. The plurality of elastic members are arranged along a second direction orthogonal to the first direction and are disposed on the side of the second clamping member facing the first clamping member. At least one of the first clamping member and the second clamping member is movable to cause the elastic members to press the plurality of battery cells onto the first clamping member.
[0008] According to the battery cell stacking device of this utility model embodiment, by setting multiple elastic elements on the side of the second clamping member facing the first clamping member, when at least one of the first and second clamping members moves, it can push multiple battery cells located between them to move synchronously, ultimately causing one end of the battery cell to compress and deform against the elastic element, and the other end of the battery cell to press firmly against the first clamping member. In this compressed state, the elastic element eliminates the length tolerance of the battery cell, and each battery cell is tightly fitted to the first clamping member under the pressure of the corresponding elastic element, resulting in a higher alignment of the multiple battery cells.
[0009] In some embodiments, the first clamping member is fixed to the base, and the second clamping member is movably disposed on the base.
[0010] In some embodiments, the cell stacking device further includes a plurality of pressure heads, which are spaced apart on the base along the second direction, and the elastic element is disposed between the pressure heads and the second clamping element.
[0011] In some embodiments, the cell stacking device further includes a pressure sensor disposed on the pressure head and located between the pressure head and the elastic member or on the side of the pressure head away from the elastic member.
[0012] In some embodiments, the base is provided with a plurality of guide grooves for guiding the pressure head and the battery cell to move along the first direction.
[0013] In some embodiments, the pressure head has a first positioning groove for mating with a first end of the battery cell.
[0014] In some embodiments, the first clamping member has a second positioning groove for engaging the second end of the battery cell.
[0015] In some embodiments, the base is provided with a plurality of guide slots for guiding the movement of the battery cell.
[0016] In some embodiments, the cell stacking device further includes a position sensor for detecting the position of at least one of the first clamping member and the second clamping member that are movable along the first direction.
[0017] In some embodiments, the cell stacking device further includes a pressure sensor for detecting the pressure exerted by the elastic element on the cell.
[0018] The battery production equipment according to the present invention includes the cell stacking device as described in any of the above embodiments.
[0019] The technical advantages of the battery production equipment according to the present utility model embodiment are the same as those of the cell stacking device in the above embodiment, and will not be repeated here. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of a battery cell stacking device according to an embodiment of the present invention, wherein the battery cells are in a state before alignment.
[0021] Figure 2 This is another schematic diagram of a cell stacking device according to an embodiment of the present invention, wherein the cells are in an aligned state.
[0022] Figure 3 This is a schematic diagram of a cell stacking device according to another embodiment of the present invention.
[0023] Figure label:
[0024] 1. Base; 11. Guide groove; 2. First clamping element; 21. Second positioning groove; 3. Second clamping element; 4. Elastic element; 5. Pressure sensor; 6. Laser sensor; 7. Pressure head; 71. First positioning groove; 8. Battery cell. Detailed Implementation
[0025] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0026] The following is combined Figures 1-3 This invention describes a cell stacking device according to an embodiment of the present invention.
[0027] The battery cell stacking device of this embodiment includes a base 1, a first clamping member 2, a second clamping member 3, and a plurality of elastic members 4. The first clamping member 2 and the second clamping member 3 are disposed on the base 1 and arranged at intervals along a first direction. At least one of the first clamping member 2 and the second clamping member 3 is movable along the first direction to move closer to and further away from the other of the first clamping member 2 and the second clamping member 3. The plurality of elastic members 4 are arranged along a second direction orthogonal to the first direction and are disposed on the side of the second clamping member 3 facing the first clamping member 2. At least one of the first clamping member 2 and the second clamping member 3 can be moved to press the plurality of battery cells 8 onto the first clamping member 2.
[0028] According to the battery cell stacking device of this utility model embodiment, by setting multiple elastic elements 4 on the side of the second clamping member 3 facing the first clamping member 2, when at least one of the first clamping member 2 and the second clamping member 3 moves, it can push multiple battery cells 8 located between them to move synchronously, so that one end of the battery cell 8 is compressed and deformed by pressing the elastic element 4, and the other end of the battery cell 8 is pressed against the first clamping member 2. Among them, the elastic element 4 in the compressed state eliminates the length tolerance of the battery cell 8, and each battery cell 8 is tightly attached to the first clamping member 2 under the pressure of the corresponding elastic element 4, resulting in a higher alignment of the multiple battery cells 8 and a better subsequent welding effect.
[0029] For example, multiple elastic elements 4 are arranged at equal intervals along the second direction. The elastic element 4 is a spring whose axial direction is consistent with the first direction. One end of the spring is fixed to the side of the second clamping member 3 facing the first clamping member 2. Each spring is used to press a battery cell 8 onto the first clamping member 2.
[0030] In some embodiments, such as Figures 1-3 As shown, the first clamping member 2 is fixed on the base 1, and the second clamping member 3 is movably disposed on the base 1.
[0031] The elastic element 4 moves towards the first clamping element 2 under the push of the second clamping element 3, pressing the battery cell 8 against the side of the first clamping element 2 facing the second clamping element 3, thereby ensuring that the ends of the multiple battery cells 8 adjacent to the first clamping element 2 are aligned. Specifically, by using the inner surface of the first clamping element 2 fixed to the base 1 as a reference surface, this reference surface is less prone to skew deformation than the inner surface of the moving second clamping element 3, thus ensuring higher reliability in aligning the multiple battery cells 8.
[0032] Specifically, the first clamping member 2 is fixed to the base 1 by fasteners, or the first clamping member 2 is integrally formed with the base 1. One of the second clamping member 3 and the base 1 is provided with a guide rail extending along the first direction, and the other of the second clamping member 3 and the base 1 is provided with a slider, which slides on the guide rail.
[0033] It should be noted that the second clamping member 3 can be moved closer to and away from the first clamping member 2 by manual operation. Alternatively, the battery cell 8 stacking fixture also includes a drive device, which is mounted on the base 1 and connected to the second clamping member 3 for transmission. The drive device drives the second clamping member 3 to move automatically back and forth along the first direction. The drive device can be a linear motor or a cylinder.
[0034] In some embodiments, such as Figures 1-3 As shown, the cell stacking device also includes a plurality of pressure heads 7, which are spaced apart on the base 1 along the second direction, and the elastic member 4 is disposed between the pressure head 7 and the second clamping member 3.
[0035] The pressure head 7 corresponds one-to-one with the elastic element 4. The pressure head 7 replaces the elastic element 4 to press the battery cell 8 against the side of the first pressing element 2 facing the second pressing element 3. Compared with the elastic element 4, the pressure head 7 can have a larger contact area with the battery cell 8, and can also ensure that the battery cell 8 can be given a pushing force in the first direction, effectively preventing the battery cell 8 from shifting during the movement.
[0036] For example, the elastic element 4 is a spring, one end of which is connected to the side of the second clamping element 3 facing the first clamping element 2, and the other end of which is connected to the pressure head 7. The pressure head 7 is a block-shaped or plate-shaped structure, and its side facing the first clamping element 2 is a vertical surface perpendicular to the first direction.
[0037] In some embodiments, the cell stacking device further includes a pressure sensor 5, which is disposed on the pressure head 7 and located between the pressure head 7 and the elastic member 4 or on the side of the pressure head 7 away from the elastic member 4.
[0038] The pressure sensor 5 can detect the pressure on the battery cell 8 along the first direction. During the movement of the second clamping member 3, once the value detected by the pressure sensor 5 is within the set range, the second clamping member 3 stops moving, indicating that the alignment operation of multiple battery cells 8 is completed. This setting provides a notification that the alignment operation of the battery cells 8 is complete, and also prevents the second clamping member 3 from continuing to move, which could cause the battery cells 8 to be subjected to excessive pressure and be damaged or leak.
[0039] Specifically, such as Figure 1 and Figure 2 As shown, the pressure sensor 5 is located on the side of the pressure head 7 away from the elastic element 4. When multiple battery cells 8 are aligned, the pressure sensor 5 is sandwiched between the pressure head 7 and the battery cells 8.
[0040] In some embodiments, such as Figure 3 As shown, the base 1 is provided with a plurality of guide grooves 11 for guiding the pressure head 7 and the battery cell 8 to move along the first direction.
[0041] The guide groove 11 is designed to facilitate the placement of multiple battery cells 8 in the set position of the base 1, ensuring that their position in the second direction of the alignment front is accurate. On the other hand, it also facilitates the pressure head 7 to continuously provide the battery cell 8 with a pushing force in the first direction, effectively preventing the battery cell 8 from shifting during movement.
[0042] For example, the guide groove 11 corresponds one-to-one with the pressure head 7, and multiple guide grooves 11 are arranged at equal intervals along the second direction.
[0043] In some embodiments, such as Figures 1-3 As shown, the pressure head 7 has a first positioning groove 71 for mating with the first end of the battery cell 8.
[0044] After the pressure head 7 moves toward the battery cell 8 so that the first end of the battery cell 8 fits into the first positioning groove 71, it effectively prevents the battery cell 8 from shifting in the second direction during subsequent movement, and the alignment reliability of the battery cell 8 is higher.
[0045] For example, the terminal of the battery cell 8 is clearance-fitted with the first positioning groove 71. The first positioning groove 71 is a blind hole with one end open facing the first clamping member 2, or the first positioning groove 71 is a groove extending along the height direction and penetrating the pressure head 7. The groove opening of the first positioning groove 71 is chamfered to facilitate easier insertion of the terminal of the battery cell 8 into the first positioning groove 71.
[0046] In some embodiments, such as Figures 1-3 As shown, the first clamping member 2 has a second positioning groove 21 for mating with the second end of the battery cell 8.
[0047] The cooperation between the second end of the battery cell 8 and the second positioning groove 21 further prevents the battery cell 8 from deflecting, ensuring that the second end face of the battery cell 8 is in close contact with the inner side of the first clamping member 2, and the alignment reliability of multiple battery cells 8 is higher.
[0048] For example, the other terminal of the battery cell 8 is clearance-fitted with the second positioning groove 21. The second positioning groove 21 is a blind hole with one end open facing the second clamping member 3, or the second positioning groove 21 is a groove extending along the height direction and penetrating the first clamping member 2. The groove opening of the second positioning groove 21 is chamfered to facilitate the smooth insertion of the other terminal of the battery cell 8 into the second positioning groove 21.
[0049] Optionally, the base 1 may also be provided with only a plurality of guide grooves 11 for guiding the movement of the battery cell 8. In this case, the guide grooves 11 are only used to position the battery cell 8 along the second direction, so that during the movement of the second clamping member 3, the two ends of the battery cell 8 can be respectively fitted with the first positioning groove 71 and the second positioning groove 21 with clearance.
[0050] Furthermore, both the first clamping member 2 and the second clamping member 3 are pressure plates, and both pressure plates are vertical plates perpendicular to the first direction. In this configuration, the first clamping member 2 and the second clamping member 3 have simple structures and low costs.
[0051] In some embodiments, the cell stacking device further includes a position sensor for detecting the position of at least one of a first clamping member 2 and a second clamping member 3 that is movable along a first direction.
[0052] When the position sensor detects that at least one of the movable components 2 and 3 has reached the set area, it indicates that the second clamping component 3 has moved into place, the elastic element 4 is compressed, and the battery cell 8 is pressed against the side of the first clamping component 2 facing the second clamping component 3 under the pressure of the elastic element 4. This setting provides a notification that the alignment operation of the battery cell 8 is complete, and also prevents the second clamping component 3 from moving further, which could cause excessive pressure on the battery cell 8 and damage or leakage.
[0053] In some embodiments, such as Figures 1-3 As shown, the position sensor includes a laser sensor 6, which is mounted on the side of the first clamping member 2 facing the second clamping member 3.
[0054] That is, the positional change of the second clamping member 3 is determined by detecting the distance between the first clamping member 2 and the second clamping member 3. The positional detection of the second clamping member 3 is convenient and reliable.
[0055] In some embodiments, the cell stacking device further includes a pressure sensor 5 for detecting the pressure exerted by the elastic member 4 on the cell 8.
[0056] When the position sensor detects that at least one of the movable components 2 and 3 has reached the set area, and the pressure sensor 5 also detects a value within the set range, it indicates that the alignment operation of multiple battery cells 8 is complete. This dual detection effectively avoids the occurrence of other unexpected situations and further improves the alignment reliability of multiple battery cells 8.
[0057] For example, when the elastic element 4 is disposed on the side of the second clamping element 3 facing the first clamping element 2, the pressure sensor 5 is disposed on the side of the first clamping element 2 facing the second clamping element 3.
[0058] The battery production equipment according to the present invention includes a cell stacking device as described in any of the above embodiments.
[0059] The technical advantages of the battery production equipment according to the present utility model embodiment are the same as those of the cell stacking device in the above embodiment, and will not be repeated here.
[0060] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.
[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0062] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0063] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0064] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0065] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.
Claims
1. An electric cell stacking device, characterized by comprising: include: Base (1); A first clamping member (2) and a second clamping member (3) are provided on the base (1) and arranged at intervals along a first direction. At least one of the first clamping member (2) and the second clamping member (3) is movable along the first direction to approach and move away from the other of the second clamping member (3) and the first clamping member (2). Multiple elastic elements (4) are arranged along a second direction orthogonal to the first direction and disposed on the side of the second clamping member (3) facing the first clamping member (2). At least one of the first clamping member (2) and the second clamping member (3) moves to press the multiple battery cells (8) onto the first clamping member (2).
2. The electric cell stacking apparatus according to claim 1, characterized by, The first clamping member (2) is fixed on the base, and the second clamping member (3) is movably disposed on the base.
3. The electric cell stacking apparatus according to claim 2, wherein The cell stacking device further includes a plurality of pressure heads (7), which are spaced apart on the base along the second direction, and the elastic member (4) is disposed between the pressure head (7) and the second clamping member (3).
4. The electric cell stacking apparatus according to claim 3, wherein The cell stacking device also includes a pressure sensor, which is disposed on the pressure head and located between the pressure head and the elastic element or on the side of the pressure head away from the elastic element.
5. The electric cell stacking apparatus according to claim 3, wherein The base is provided with a plurality of guide grooves (11) for guiding the pressure head and the battery cell to move along the first direction.
6. The electric cell stacking apparatus according to claim 3, wherein The pressure head (7) has a first positioning groove (71) for engaging the first end of the battery cell (8).
7. The electric cell stacking apparatus according to claim 2, wherein The first clamping member (2) has a second positioning groove (21) for engaging the second end of the battery cell (8).
8. The electric cell stacking apparatus according to claim 1, wherein The base (1) is provided with a plurality of guide slots (11) for guiding the movement of the battery cell (8).
9. The electric cell stacking apparatus according to claim 1, wherein, The cell stacking device further includes a position sensor for detecting the position of at least one of the first clamping member (2) and the second clamping member (3) that are movable along the first direction.
10. The electric cell stacking apparatus according to any one of claims 1-3 and 5-9, characterized by, The cell stacking device also includes a pressure sensor (5) for detecting the pressure exerted by the elastic element (4) on the cell (8).
11. A battery production apparatus characterized by comprising: Includes the cell stacking device according to any one of claims 1-10.