Positioning jig

Abstract

The utility model relates to battery technical field discloses a positioning jig, can make the accurate positioning between electric core and adapter piece, guarantee the welding quality of both. Positioning jig includes jig bottom plate, and jig bottom plate is equipped with adapter piece positioning area and two electric core positioning areas, and two electric core positioning areas set up in the both sides of adapter piece positioning area, and adapter piece positioning area and electric core positioning area arrange along the first direction. Electric core positioning area is equipped with first carrier plate and positioning assembly, and first carrier plate is used for placing electric core, and positioning assembly is used for positioning between electric core and first carrier plate. Adapter piece positioning area is equipped with second carrier plate and two groups of top rod, and second carrier plate is used for placing adapter piece, and two groups of top rod set up in the both sides of adapter piece along the first direction arrangement, along the second direction, and the end portion of top rod away from jig bottom plate protrudes from the side end face of second carrier plate away from jig bottom plate, and top rod is used for and the side of tab towards jig bottom plate abuts.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a positioning fixture. Background Technology

[0002] When welding the tabs of two battery cells together using an adapter, a fixture is typically used to position the battery cells and the adapter. The fixture is then transported to the welding station for welding the adapter and tabs. If the positioning between the battery cells and the fixture is poor during this transport—for example, if the fixture's speed suddenly changes—it can cause misalignment between the battery cells and the fixture. This misalignment will also affect the welding position of the adapter and the tab, ultimately impacting the quality of the subsequent welding between the tab and the adapter. Utility Model Content

[0003] This utility model provides a positioning fixture that can be used to position the battery cell and the adapter plate, ensuring accurate positioning between the battery cell and the adapter plate, thereby ensuring the welding quality between the electrode tab and the adapter plate.

[0004] This utility model provides a positioning fixture for positioning a battery cell and an adapter plate. The battery cell includes a battery cell body and a tab connected to the battery cell body. The positioning fixture includes a fixture base plate, which has an adapter plate positioning area and two battery cell positioning areas. The two battery cell positioning areas are located on both sides of the adapter plate positioning area, and the adapter plate positioning area and the battery cell positioning area are arranged along a first direction.

[0005] The cell positioning area is provided with a first carrier plate and a positioning component. The first carrier plate is used to place the cell, and the positioning component is used to position the cell and the first carrier plate.

[0006] The adapter plate positioning area is provided with a second carrier plate and two sets of push rods. The second carrier plate is used to place the adapter plate. The two sets of push rods are arranged on both sides of the adapter plate along the first direction. Along the second direction, the end of the push rod away from the fixture base plate protrudes from the end face of the second carrier plate away from the fixture base plate. The push rod is used to abut against the side of the electrode ear facing the fixture base plate.

[0007] Wherein, the second direction is a direction perpendicular to the base plate of the fixture, and the second direction is perpendicular to the first direction.

[0008] The positioning fixture provided by this utility model has a first carrier plate and a second carrier plate on its base plate. The first carrier plate and the second carrier plate are used to place the battery cell and the adapter plate, respectively. The electrode tab of the battery cell can overlap the second carrier plate and is located below the adapter plate. The base plate of the fixture is also provided with a positioning component and a push rod. The positioning component can position the battery cell to ensure that the battery cell is relatively fixed to the first carrier plate. The push rod can be used to lift the electrode tab so that part of the electrode tab is higher than the adapter plate. During the transportation process of the positioning fixture, because the electrode tab and the push rod abut against each other, the electrode tab is divided into several non-parallel segments, making it less likely to shift relative to the push rod in the first direction, thereby ensuring accurate positioning between the electrode tab and the adapter plate, and thus ensuring the subsequent welding quality. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a structure in which the battery cell and the adapter plate are placed in a positioning fixture in an embodiment of this utility model;

[0010] Figure 2 This is a schematic diagram of the positioning fixture in one embodiment of the present utility model;

[0011] Figure 3 This is a schematic diagram of the structure of a battery cell in one embodiment of the present utility model;

[0012] Figure 4 This is a schematic diagram of a structure in which the push rod lifts the pole lug in an embodiment of this utility model;

[0013] Figure 5 This is a schematic diagram of the structure of the pressure block in one embodiment of the present utility model;

[0014] Figure 6 This is a top view of one of the positioning fixtures in an embodiment of the present utility model;

[0015] Figure 7 This is a top view schematic diagram of another positioning fixture in the embodiments of this utility model.

[0016] In the picture:

[0017] 10-Battery cell; 11-Battery cell body; 12-Electrode tab; 20-Adapter piece; 100-Jig base plate; 200-First carrier plate; 300-Positioning assembly; 310-First positioning block; 311-Abutting part; 312-Connecting part; 313-Strip hole; 320-Second positioning block; 321-Guide surface; 330-Elastic component; 400-Second carrier plate; 410-Limiting groove; 420-Positioning groove; 430-Positioning post; 500-Top rod; 600-Pressure block; 610-Positioning part; 620-Hollowed out; 630-Positioning hole; S1-Battery cell positioning area; S2-Adapter piece positioning area. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] refer to Figure 1 and Figure 2 The positioning fixture in this embodiment may include a fixture base plate 100. The fixture base plate 100 is provided with an adapter plate positioning area S2 and two battery cell positioning areas S1, which are respectively located on opposite sides of the adapter plate positioning area S2. In this case, the battery cell positioning area S1 and the adapter plate positioning area S2 can be regarded as being arranged along a first direction.

[0020] The cell positioning area S1 is provided with a first carrier plate 200 and a positioning component 300. The first carrier plate 200 can be used to place the cell 10, and the positioning component 300 can be used to position the cell 10 and the first carrier plate 200.

[0021] It is worth mentioning that, please refer to the following: Figure 2 and Figure 3 In this embodiment, the battery cell 10 may include a battery cell body 11 and a tab 12 connected to the battery cell body 11. The tab 12 may include a positive tab and a negative tab. When the battery cell 10 is placed on the first carrier plate 200, the tab 12 is located on the side of the battery cell body 11 near the adapter plate positioning area S2.

[0022] Continue to refer to Figures 1 to 3 The adapter plate positioning area S2 is provided with a second carrier plate 400, which can be used to place the adapter plate 20. There can be two sets of adapter plates 20, with each set corresponding to a battery cell 10 on one side. Each battery cell 10 can be soldered to one set of adapter plates 20. When the battery cell 10 and the adapter plate 20 are placed on the first carrier plate 200 and the second carrier plate 400 respectively, the tab 12 can be located on the side of the adapter plate 20 facing the fixture base plate 100.

[0023] The adapter plate positioning area S2 is also provided with two sets of push rods 500. The two sets of push rods 500 are arranged along the first direction on both sides of the adapter plate 20, and the two sets of push rods 500 are arranged corresponding to the two battery cells 10. Along the second direction, the end of the push rod 500 facing away from the fixture base plate 100 protrudes from the end of the second carrier plate 400 facing away from the fixture base plate 100. It can also be understood that the dimension of the push rod 500 along the second direction is larger than the dimension of the second carrier plate 400 along the second direction. Here, the second direction can be regarded as the direction perpendicular to the fixture base plate 100, and the second direction is perpendicular to the first direction.

[0024] refer to Figure 4 When the battery cell 10 is placed on the first carrier plate 200, a portion of the tab 12 is located on the second carrier plate 400 to facilitate subsequent welding of the tab 12 to the adapter plate 20. The push rod 500 can abut against the side of the tab 12 facing the fixture base plate 100, so that the part of the tab 12 near the battery cell body 11 is lifted by the push rod 500 and extends beyond the adapter plate 20. At this time, the tab 12 can be regarded as being composed of several non-parallel structural segments connected together.

[0025] In this embodiment, a positioning fixture is used to position the battery cell 10 and the adapter plate 20. The positioning fixture is then transported to the welding station for welding of the tab 12 and the adapter plate 20. A positioning component 300 is provided on the fixture base plate 100, which can accurately position the battery cell body 11 to prevent the battery cell 10 from shifting relative to the fixture base plate 100. A push rod 500 is provided to lift the tab 12 of the battery cell 10, causing a portion of the tab 12 to protrude beyond the adapter plate 20, while the other portion of the tab 12 lies below the adapter plate 20. During fixture transport, the push rod 500 restricts the movement of the tab 12 relative to the adapter plate 20 along a first direction, thereby ensuring accurate welding position of the tab 12 and the adapter plate 20 and guaranteeing the welding quality between them.

[0026] In addition, because the welding position between the tab 12 and the adapter piece 20 is accurate, the problem of the tab 12 being inserted upside down can be avoided when the cover plate is used to press down the adapter piece 20 and the tab 12 during subsequent shell insertion.

[0027] Each set of top rods 500 can be configured according to the arrangement of the tabs 12 of the battery cell 10. For example, when the battery cell 10 includes a positive tab and a negative tab located on the same side of the battery cell body 11, the number of top rods 500 is two. In this case, the two top rods 500 are respectively located directly below the two tabs 12 of the battery cell 10. When the battery cell 10 is placed on the first carrier plate 200, the tabs 12 can be directly connected to the top of the top rod 500, and the part of the tab 12 extending beyond the top rod 500 along the first direction can be connected to the second carrier plate 400.

[0028] The tab 12 facing the cell 10 may also have a slope, with the end of the slope near the second carrier plate 400 being higher than the end near the first carrier plate 200 along the first direction. When the push rod 500 lifts the tab 12, the slope guides the tab 12 to more easily fit against the push rod 500, thus ensuring the contact effect between the tab 12 and the push rod 500 and preventing the tab 12 from easily moving relative to the push rod 500.

[0029] In some embodiments, refer again Figure 2 The second carrier plate 400 may be provided with a limiting groove 410 for placing the adapter piece 20. The adapter piece 20 can abut against the inner wall of the limiting groove 410 so that the adapter piece 20 is engaged with the limiting groove 410. Since the second carrier plate 400 is positioned with the limiting groove 410, the adapter piece 20 and the second carrier plate 400 can remain relatively fixed during the transportation of the positioning fixture, thereby ensuring that the adapter piece 20 and the second carrier plate 400 will not shift, that is, the adapter piece 20 will not shift in position with the battery cell 10.

[0030] The number of limiting slots 410 can be set one-to-one with the number of adapter pieces 20. As mentioned earlier, if the two tabs 12 of the battery cell 10 are arranged on the same side of the battery cell body 11, then there are two adapter pieces 20 for each battery cell 10. In this case, the two adapter pieces 20 are arranged at intervals. Correspondingly, the second carrier plate 400 is provided with two limiting slots 410 arranged at intervals, and each adapter piece 20 is snapped into the corresponding limiting slot 410.

[0031] In some embodiments, such as Figure 1 and Figure 2 As shown, the positioning fixture may further include a pressure block 600, which is disposed in the adapter plate positioning area S2 and placed on the second carrier plate 400. Specifically, the pressure block 600 is located on the side of the adapter plate 20 facing away from the second carrier plate 400, so that the pressure block 600 can press the adapter plate 20 and the electrode tab 12 together. On the one hand, pressing the adapter plate 20 and the electrode tab 12 together ensures that the adapter plate 20 and the electrode tab 12 are fully fitted together. On the other hand, the pressing action of the pressure block 600 can further position the electrode tab 12 and the adapter plate 20 to ensure that the electrode tab 12 and the adapter plate 20 do not shift.

[0032] In this embodiment, the clamping block 600 can be used simultaneously to clamp the adapter pieces 20 and the electrode tabs 12 on both sides. Furthermore, to prevent the clamping block 600 from interfering with the welding work between the adapter pieces 20 and the electrode tabs 12, combined with... Figure 1 , Figure 2 and Figure 5The pressure block 600 may also have a perforation 620 on each side along the first direction, and the perforation 620 may penetrate the pressure block 600 along the second direction. When the pressure block 600 is pressed onto the adapter piece 20, the part of the adapter piece 20 facing the perforation 620 may be exposed. When welding the adapter piece 20 to the electrode tab 12 in the future, the welding tool can be passed through the perforation 620 to perform the welding.

[0033] In this case, when the pressure block 600 presses the adapter piece 20 and the tab 12, the part of the pressure block 600 used for pressing is located on the side of the cutout 620 facing the cell 10 along the first direction. At this time, the pressure block 600 and the push rod 500 cooperate with each other to further improve the positioning effect of the tab 12 and minimize the offset of the tab 12 relative to the second carrier plate 400.

[0034] Furthermore, to ensure that the cutout 620 of the pressure block 600 is aligned with the welding point between the adapter piece 20 and the tab 12 when the pressure block 600 is pressed onto the adapter piece 20, the second carrier plate 400 may also be provided with a positioning structure so that the pressure block 600 can be placed in a fixed position, thereby achieving the positioning between the pressure block 600 and the adapter piece 20.

[0035] As an optional implementation scheme, combined with Figure 2 and Figure 5 The second carrier plate 400 may be provided with a positioning groove 420, and the pressing block 600 may be located in the positioning groove 420 when placed on the second carrier plate 400. Based on this, since the pressing block 600 needs to press the adapter pieces 20 on both sides, the dimension of the pressing block 600 along the first direction is relatively large. To avoid interference between the positioning groove 420 and the limiting groove 410 used to place the adapter pieces 20, a positioning part 610 may be provided on the side of the pressing block 600 facing the second carrier plate 400. This positioning part 610 protrudes from the surface of the pressing block 600, and the dimension of the positioning part 610 along the first direction is smaller than the dimension of the pressing block 600 along the first direction.

[0036] Along the first direction, the positioning groove 420 can be located between the two limiting grooves 410, and the positioning part 610 is engaged in the positioning groove 420. In this way, the positioning groove 420 and the limiting groove 410 are isolated from each other and do not affect each other, and the positioning effect of the pressure block 600 can still be achieved. Furthermore, when the positioning block is located in the positioning groove 420, the side of the positioning block facing the second carrier plate 400 can also contact the adapter piece 20 to press the adapter piece 20 and the electrode tab 12 together.

[0037] As another alternative implementation scheme, continue to refer to Figure 2 and Figure 5The second carrier plate 400 is provided with positioning posts 430, and the corresponding pressure block 600 is provided with positioning holes 630. When the pressure block 600 is placed on the second carrier plate 400, the positioning posts 430 can be fixed in the positioning holes 630, thereby achieving the positioning effect of the pressure block 600.

[0038] There can be two positioning posts 430, which are arranged on both sides of the second carrier plate 400 along a third direction. At this time, the pressure block 600 has positioning holes 630 on both sides along the third direction. The positioning effect of the pressure block 600 can be enhanced by the cooperation of the positioning posts 430 and the positioning holes 630 on both sides. Here, the third direction can be considered as perpendicular to the first direction and perpendicular to the second direction.

[0039] In practical applications, either the positioning groove 420 or the positioning hole 630 on the second carrier plate 400 can be set, or both can be set at the same time. The specific design can be based on actual needs.

[0040] It is worth mentioning that the positioning post 430 in the above embodiment can also be set on the surface of the pressure block 600, and correspondingly, the positioning hole 630 is set on the second carrier plate 400. In specific implementation, the structure of the positioning post 430 and the positioning hole 630 can be designed according to actual needs, and this embodiment does not limit it.

[0041] In some embodiments, reference Figure 2 and Figure 6 The positioning component 300 may include a first positioning block 310, which is disposed on the side of the first carrier plate 200 opposite to the second carrier plate 400 along a first direction. When the battery cell 10 is placed on the first carrier plate 200, the first positioning block 310 can abut against the end face of the battery cell body 11 opposite to the second carrier plate 400. Simultaneously, the dimension of the second carrier plate 400 along a second direction may be larger than the dimension of the first carrier plate 200 along the second direction, so that the end face of the second carrier plate 400 facing the first carrier plate 200 abuts against the end face of the battery cell body 11. Thus, through the cooperation of the first positioning block 310 and the second carrier plate 400, precise positioning of the battery cell 10 in the first direction can be achieved.

[0042] In this embodiment, the first positioning block 310 can also move relative to the fixture base plate 100 along a first direction to change the distance between the first positioning block 310 and the first carrier plate 200. It is understood that when it is necessary to place the battery cell 10 on the first carrier plate 200, the first positioning block 310 can be driven to move away from the first carrier plate 200, so that the distance between the first positioning block 310 and the second carrier plate 400 is greater than the size of the battery cell 10, so that the battery cell 10 can be quickly placed on the first carrier plate 200. Subsequently, the first positioning block 310 can be driven to move towards the first carrier plate 200, so that the first positioning block 310 abuts against the end face of the battery cell 10, thereby fixing the battery cell 10 in the first direction.

[0043] As an optional implementation scheme, refer to Figure 7 The positioning component 300 may further include an elastic member 330, which is disposed on the side of the first positioning block 310 opposite to the first carrier plate 200. One end of the elastic member 330 may be fixedly connected to the fixture base plate 100, and the other end may be connected to the first carrier plate 200. Furthermore, the elastic member 330 may extend and retract along a first direction.

[0044] In this implementation plan, combined with Figure 1 and Figure 7 When the elastic member 330 is in its initial state, the distance between the first positioning block 310 and the second carrier plate 400 in the first direction can be slightly smaller than the dimension of the battery cell 10 along the first direction. When the first positioning block 310 is driven to move away from the first carrier plate 200, the elastic member 330 is compressed. Subsequently, when the battery cell 10 is placed on the first carrier plate 200, the driving force acting on the first positioning block 310 is canceled. At this time, under the action of the elastic restoring force, the elastic member 330 can drive the first positioning block 310 to move towards the first carrier plate 200 until the first positioning block 310 abuts against the battery cell 10.

[0045] It is understood that when the first positioning block 310 is in a state of abutting against the battery cell 10, the elastic reset member is still in a compressed state and still has the driving force to drive the battery cell 10 toward the second carrier plate 400. Since the second carrier plate 400 has a limiting effect on the battery cell 10, the battery cell 10 and the first carrier plate 200 can remain relatively fixed under the cooperation of the second carrier plate 400 and the elastic reset member.

[0046] In practical applications, when the first positioning block 310 is driven to move relative to the fixture base plate 100, it can be achieved by manual driving or by using a driving device (such as a motor). This embodiment does not limit this.

[0047] Alternatively, in another alternative embodiment, along the first direction, the elastic member 330 may also be disposed on the side of the first positioning block 310 facing the first carrier plate 200 (not shown in the figure). In this case, in order to facilitate the installation of the elastic member 330, the elastic member 330 may be disposed on the side of the fixture base plate 100 away from the first carrier plate 200, that is, the elastic member 330 is located at the bottom of the fixture base plate 100.

[0048] One end of the elastic member 330 is fixedly connected to the fixture base plate 100, and the other end can be connected to the first positioning block 310 via an adapter. When the first positioning block 310 is driven to move away from the first carrier plate 200, the elastic member 330 is stretched. After the battery cell 10 is placed on the first carrier plate 200, the elastic member can drive the first positioning block 310 to move toward the first carrier plate 200, thereby making the first positioning block 310 abut against the battery cell 10.

[0049] Furthermore, in this embodiment, reference is made again. Figure 2 The first positioning block 310 can be an L-shaped structure, specifically including a first abutment portion 311 and a connecting portion 312, with the abutment portion 311 perpendicular to the connecting portion 312. The connecting portion 312 has a strip-shaped hole 313 extending along a first direction, and the connecting portion 312 can be connected to the fixture base plate 100 via a locking attachment passing through the strip-shaped hole 313. The abutment portion 311 is disposed perpendicular to the fixture base plate 100 for abutting against the end face of the battery cell 10.

[0050] The two ends of the slot 313 can be used to limit the travel distance of the first positioning block 310, so as to avoid excessive stretching or contraction of the elastic member 330 due to excessive movement of the first positioning block 310, which would cause plastic deformation of the elastic member 330. Taking the elastic member 330 as being located on the side of the first positioning block 310 away from the first carrier plate 200 as an example, when the first positioning block 310 is driven to move away from the first carrier plate 200, the first positioning block 310 can move up to the point where the locking attachment abuts against the end of the slot 313 closest to the first carrier plate 200. When the elastic member 330 drives the first positioning block 310 to move towards the first carrier plate 200, the first positioning block 310 can move up to the point where the locking attachment abuts against the end of the slot 313 away from the first carrier plate 200.

[0051] In this embodiment, the ratio of the dimension of the first positioning block 310 along a third direction to the dimension of the battery cell body 11 along a third direction can be greater than or equal to 0.5. This ensures that the contact area between the first positioning block 310 and the end face of the battery cell 10 is sufficient, thereby improving the positioning effect of the first positioning block 310 on the battery cell 10. It is understandable that when the contact area between the first positioning block 310 and the end face of the battery cell 10 is small, the battery cell 10 will easily slide relative to the first positioning block 310 during the transfer of the positioning fixture, resulting in inaccurate positioning of the battery cell 10. Therefore, by increasing the contact area between the first positioning block 310 and the battery cell 10, sliding of the battery cell 10 relative to the first positioning block 310 can be avoided.

[0052] refer to Figure 2 and Figure 6 In some embodiments, the positioning component 300 may further include two sets of second positioning blocks 320, which are respectively disposed on both sides of the first carrier plate 200 along a third direction. When the battery cell 10 is placed on the first carrier plate 200, the two sets of second positioning blocks 320 can respectively abut against the two end faces of the battery cell 10 along the third direction, so that the two sets of second positioning blocks 320 can cooperate to limit the battery cell 10 in the second direction.

[0053] Each set of second positioning blocks 320 may include at least two second positioning blocks 320, with adjacent second positioning blocks 320 spaced apart, thereby increasing the contact area between the second positioning blocks 320 and the battery cell 10, thereby improving the positioning effect.

[0054] Understandably, when the battery cell 10 is placed on the first carrier plate 200, a gripping device (e.g., a gripper) can be used to grip the battery cell 10 and place it on the first carrier plate 200. By spacing the adjacent second positioning blocks 320 apart, the gripping device can extend into the gap between the adjacent second positioning blocks 320 when placing the battery cell 10 on the first carrier plate 200 or removing the battery cell 10 from the first carrier plate 200, thereby facilitating the operation of the gripping device.

[0055] In this embodiment, the second positioning block 320 can be fixedly connected to the fixture base plate 100. The distance between the two sets of second positioning blocks 320 is the same as the size of the battery cell 10 along a third direction, so as to save the work of adjusting the position of the second positioning block 320.

[0056] Based on this, along a third direction, a guide surface 321 can also be provided on the side of the second positioning block 320 facing the first carrier plate 200. This guide surface 321 is located on the side of the second positioning block 320 away from the fixture base plate 100. When the battery cell 10 is placed on the first carrier plate 200 from top to bottom, the guide surface 321 can be used to guide the battery cell 10, thereby making it easier for the battery cell 10 to be placed into the space between the two sets of second positioning blocks 320.

[0057] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A positioning jig for positioning a battery cell and a tab, the battery cell comprising a battery cell body and a tab connected to the battery cell body, the positioning jig comprising: a first positioning member configured to position the battery cell body; a second positioning member configured to position the tab; and a positioning member configured to position the tab with respect to the battery cell body. The positioning fixture includes a fixture base plate, which has an adapter plate positioning area and two battery cell positioning areas. The two battery cell positioning areas are located on both sides of the adapter plate positioning area, and the adapter plate positioning area and the battery cell positioning areas are arranged along a first direction. The cell positioning area is provided with a first carrier plate and a positioning component. The first carrier plate is used to place the cell, and the positioning component is used to position the cell and the first carrier plate. The adapter plate positioning area is provided with a second carrier plate and two sets of push rods. The second carrier plate is used to place the adapter plate. The two sets of push rods are arranged on both sides of the adapter plate along the first direction. Along the second direction, the end of the push rod away from the fixture base plate protrudes from the end face of the second carrier plate away from the fixture base plate. The push rod is used to abut against the side of the electrode ear facing the fixture base plate. Wherein, the second direction is a direction perpendicular to the base plate of the fixture, and the second direction is perpendicular to the first direction.

2. The positioning jig according to claim 1, wherein The second carrier plate is provided with a limiting groove, and the adapter piece is snapped into the limiting groove.

3. The positioning fixture of claim 2, wherein It also includes a pressure block, which is disposed on the side of the second carrier plate away from the base plate of the fixture, and the pressure block is used to press the adapter piece and the electrode tab together.

4. The positioning fixture of claim 3, wherein The pressure block has hollowed-out sections on both sides arranged along the first direction. The hollowed-out sections are directly opposite the welding points of the adapter piece and the electrode tab, so that the welding points of the adapter piece and the electrode tab are exposed through the hollowed-out sections.

5. The positioning fixture of claim 3, wherein The second carrier plate is provided with a positioning groove, and the pressure block is disposed in the positioning groove; and / or The second carrier plate is provided with a positioning post, and the pressure block is provided with a positioning hole, with the positioning post fixed in the positioning hole.

6. The positioning fixture of claim 1, wherein The positioning component includes a first positioning block, which is disposed on the side of the first carrier plate away from the second carrier plate. The first positioning block is used to abut against the end face of the cell body away from the second carrier plate. The second carrier plate is larger in size along the second direction than the first carrier plate in the second direction, so that the end face of the second carrier plate facing the first carrier plate abuts against the end face of the cell body.

7. The positioning fixture of claim 6, wherein The positioning component further includes an elastic member, which is disposed on the side of the first positioning block opposite to the first carrier plate along the first direction; One end of the elastic component is connected to the base plate of the fixture, and the other end is connected to the first positioning block, and the elastic component can extend and retract along the first direction.

8. The positioning fixture of claim 6, wherein, The ratio of the dimension of the first positioning block along the third direction to the dimension of the cell body along the third direction is greater than or equal to 0.5; The third direction is perpendicular to the first direction and also perpendicular to the second direction.

9. The positioning fixture of claim 1, wherein, The positioning component includes two sets of second positioning blocks, which are respectively disposed on opposite sides of the first carrier plate along the third direction, and the two sets of second positioning blocks respectively abut against the two end faces of the battery cell body along the third direction. The third direction is perpendicular to the first direction and also perpendicular to the second direction.

10. The positioning fixture of claim 9, wherein, Along the third direction, the second positioning block has a guide surface on the side facing the first carrier plate.

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