Battery cell measuring device

Abstract

The utility model provides a battery cell measuring device. The cell measuring device comprises a mounting plate, the mounting plate is provided with at least one first movable groove and at least two second movable grooves arranged at intervals, and the extension directions of the first movable groove and the second movable grooves are perpendicular to each other; the positioning assembly comprises a plurality of positioning plates, the first movable groove is correspondingly and movably provided with at least one positioning plate, each second movable groove is correspondingly provided with at least two positioning plates, and the positioning plate corresponding to the first movable groove and the positioning plate corresponding to one second movable groove define a battery core positioning space; and at least two positioning plates corresponding to the other second movable groove define a tab positioning space. According to the utility model, the problems of poor measurement effect and inconvenient measurement of the edge distance parameter of the battery cell in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of battery production equipment, and more specifically, to a cell measuring device. Background Technology

[0002] In the secondary battery manufacturing process, the winding process is the starting point for the electrode sheets to become battery cells. Controlling the cell edge distance (the distance from the tab to the side of the cell) is a crucial parameter. Abnormal edge distance control can lead to issues such as incomplete welding of the tabs, interference between the tabs and the tray causing tearing, and tab folding. Currently, materials are nearing their capacity limits. Measuring the edge distance requires employees to use rulers, which involves holding the battery cells by hand and applying pressure during measurement. This can cause variations in cell condition and lead to measurement errors. Furthermore, the large volume of data collected results in slow efficiency and increased workload for employees.

[0003] Therefore, existing technologies suffer from poor measurement results and inconvenience in measuring cell edge distance parameters. Utility Model Content

[0004] The main purpose of this invention is to provide a battery cell measuring device to solve the problems of poor measurement effect and inconvenience of battery cell edge distance parameter measurement in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery cell measuring device is provided, comprising: a mounting plate having at least one first movable slot and at least two spaced-apart second movable slots, the extending directions of the first and second movable slots being perpendicular to each other; and a positioning assembly comprising a plurality of positioning plates, wherein at least one positioning plate is movably disposed corresponding to each first movable slot, and at least two positioning plates are disposed corresponding to each second movable slot, the positioning plate corresponding to the first movable slot and the positioning plate corresponding to one of the second movable slots forming a battery cell positioning space, and the at least two positioning plates corresponding to the other second movable slot forming a tab positioning space.

[0006] Furthermore, the positioning plate includes: a positioning block, at least a portion of which is movably disposed within a corresponding first or second movable slot and is capable of moving along the corresponding first or second movable slot; and a stop block, at least a portion of which is disposed outside the corresponding first or second movable slot and connected to the positioning block, and the positioning plate forms a cell positioning space or a tab positioning space through the stop block.

[0007] Furthermore, the positioning plate has a locked state and an unlocked state. When the positioning plate is in the unlocked state, the positioning block can move along the first movable slot or the second movable slot. The cell measuring device also includes multiple locking elements. Each positioning block is respectively provided with a locking element. The locking element can enter or exit the first movable slot or the second movable slot. When the locking element enters the first movable slot or the second movable slot, the positioning plate switches from the unlocked state to the locked state.

[0008] Furthermore, limiting flanges extending in a direction close to each other are respectively provided on both sides of the first movable groove and the second movable groove along the length direction. At least one of the limiting flanges has at least one locking hole that cooperates with the locking member. The locking member can enter the first movable groove or the second movable groove through the locking hole and abut against the corresponding positioning block so that the positioning plate is kept in the locked state.

[0009] Furthermore, there is one first movable slot and two second movable slots, which are respectively the first sub-movable slot and the second sub-movable slot. The first sub-movable slot passes through the first movable slot, and the second sub-movable slot is set at one end corresponding to the length direction of the first movable slot. The first sub-movable slot is provided with a positioning plate on each side corresponding to the first movable slot, and the second sub-movable slot is provided with four positioning plates.

[0010] Furthermore, in the extending direction of the first sub-movable slot, two positioning plates are located on one side of the first movable slot and form one of the electrode positioning spaces, while the other two positioning plates are located on the other side of the first movable slot and form another electrode positioning space.

[0011] Furthermore, a set of opposing inner sidewalls of the second sub-movable groove are provided with limiting protrusions extending in a direction of mutual approach, so as to divide the second sub-movable groove into slides that are interconnected and spaced apart along the depth direction of the second sub-movable groove, and two positioning plates that form the same electrode positioning space are located in different slides of the second movable groove.

[0012] Furthermore, the length of the positioning plate located in the first sub-moving slot is greater than the length of the positioning plate located in the second sub-moving slot.

[0013] Furthermore, scales are provided on the periphery of the first movable groove and the periphery of the second movable groove, respectively.

[0014] Furthermore, along the length of the first movable slot, there is a clearance gap between the ends of any two positioning plates corresponding to two adjacent second movable slots; and / or at least one end of the first movable slot and / or the second movable slot is connected to one side of the mounting plate.

[0015] Applying the technical solution of this utility model, the cell measuring device in this application includes a mounting plate and a positioning component. The mounting plate is provided with at least one first movable slot and at least two spaced second movable slots, the extension directions of the first and second movable slots being perpendicular to each other. The positioning component includes multiple positioning plates, at least one positioning plate is movably provided corresponding to each first movable slot, and at least two positioning plates are provided corresponding to each second movable slot. The positioning plate corresponding to the first movable slot and the positioning plate corresponding to one of the second movable slots form a cell positioning space, and the at least two positioning plates corresponding to the other second movable slot form a tab positioning space.

[0016] When using the cell measuring device of this application, since both the first and second movable slots are equipped with adjustable positioning plates, the positioning plates in the first and second movable slots can be adjusted according to the size parameters corresponding to the model of the cell to be measured. This adjustment of the positioning plate's position within its corresponding first or second movable slot allows for the determination of the cell positioning space and the tab positioning space, ensuring that these spaces correspond to the size parameters of the cell to be measured. Furthermore, the size of the cell positioning space and the tab positioning space can be used to determine if the cell meets production requirements. In actual operation, the operator only needs to place the cell into the cell positioning slot and align the cell's tab with the tab positioning space to determine if the cell meets production requirements. Therefore, compared to the existing method of manually measuring cell parameters, using the cell measuring device of this application not only effectively improves the efficiency of cell measurement but also significantly improves the accuracy of cell parameter measurement. Additionally, using the cell measuring device of this application effectively avoids the problem of collisions that can easily occur during manual cell measurement. Therefore, the cell measuring device in this application effectively solves the problems of poor cell edge distance parameter measurement effect and inconvenience in the prior art. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of a cell measuring device according to a specific embodiment of the present invention is shown;

[0019] Figure 2 It shows Figure 1 A schematic diagram of the battery cell measuring device from another angle;

[0020] Figure 3 It shows Figure 1A schematic diagram showing the positional relationship between the battery cell measuring device and the battery cell when measuring the battery cell.

[0021] Figure 4 A schematic diagram of the battery cell structure is shown in a specific embodiment of this application;

[0022] Figure 5 A schematic diagram showing the positional relationship between the limiting flange and the positioning block of the cell measuring device in a specific embodiment of this application is shown.

[0023] The above figures include the following reference numerals:

[0024] 10. Mounting plate; 11. First movable slot; 12. Second movable slot; 121. First sub-movable slot; 122. Second sub-movable slot; 1221. Limiting protrusion; 13. Limiting flange; 131. Locking hole; 20. Positioning plate; 21. Positioning block; 22. Stop block; 30. Cell positioning space; 40. Electrode positioning space; 50. Locking component; 60. Scale; 70. Cell; 71. Positive electrode tab; 72. Negative electrode tab. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0028] To address the problems of poor measurement results and inconvenience in measuring cell edge distance parameters in existing technologies, this application provides a cell measuring device.

[0029] like Figures 1 to 3 as well as Figure 5As shown, the cell measuring device in this application includes a mounting plate 10 and a positioning assembly. The mounting plate 10 is provided with at least one first movable slot 11 and at least two spaced second movable slots 12. The extending directions of the first movable slot 11 and the second movable slot 12 are perpendicular to each other. The positioning assembly includes a plurality of positioning plates 20. At least one positioning plate 20 is movably provided for each first movable slot 11, and at least two positioning plates 20 are provided for each second movable slot 12. The positioning plate 20 corresponding to the first movable slot 11 and the positioning plate 20 corresponding to one of the second movable slots 12 form a cell positioning space 30, and the at least two positioning plates 20 corresponding to the other second movable slot 12 form a tab positioning space 40.

[0030] When using the cell measuring device of this application, since both the first movable slot 11 and the second movable slot 12 are equipped with position-adjustable positioning plates 20, the positioning plates 20 in the first movable slot 11 and the second movable slot 12 can be adjusted according to the size parameters corresponding to the model of the cell to be measured. By adjusting the position of the positioning plates 20 in their corresponding first movable slot 11 or second movable slot 12, the size of the cell positioning space 30 and the tab positioning space 40 can be determined, thereby ensuring that the size of the cell positioning space 30 and the tab positioning space 40 corresponds to the size parameters of the cell to be measured. Furthermore, the cell to be measured can be judged using the cell positioning space 30 and the tab positioning space 40. In actual operation, the operator only needs to place the cell into the cell positioning space and align the tabs of the cell with the tab positioning space 40 to determine whether the cell meets production requirements. Therefore, compared with the existing method of manually measuring cell parameters, using the cell measuring device of this application can not only effectively improve the efficiency of cell measurement, but also effectively improve the accuracy of cell parameter measurement. At the same time, using the cell measuring device of this application can effectively avoid the problem of collisions that are easily caused to the cell during manual measurement. Therefore, the cell measuring device of this application effectively solves the problems of poor measurement results and inconvenience in the existing technology for cell edge distance parameters.

[0031] Therefore, in this application, when it is necessary to change the dimensional parameters of the battery cell being measured, only the size of the battery cell positioning space 30 and the tab positioning space 40 needs to be changed. Thus, the battery cell measuring device in this application can be applied to the measurement of dimensional parameters of different models of battery cells.

[0032] In one specific embodiment of this application, the positioning plate 20 includes a positioning block 21 and a stop block 22. At least a portion of the positioning block 21 is movably disposed within the corresponding first movable groove 11 or second movable groove 12 and is capable of moving along the corresponding first movable groove 11 or second movable groove 12; at least a portion of the stop block 22 is disposed outside the corresponding first movable groove 11 or second movable groove 12 and connected to the positioning block 21, and the positioning plate 20 forms a cell positioning space 30 or a tab positioning space 40 through the stop block 22. Therefore, in this embodiment, the cell positioning space 30 and the tab positioning space 40 are formed between different positioning plates 20 through the stop block 22, and the positioning plate 20 cooperates with the corresponding first movable groove 11 or second movable groove 12 by setting the positioning block 21.

[0033] Preferably, the positioning plate 20 has a locked state and an unlocked state. When the positioning plate 20 is in the unlocked state, the positioning block 21 can move along the first movable slot 11 or the second movable slot 12. The cell measuring device also includes multiple locking elements 50, each positioning block 21 is respectively provided with a locking element 50. The locking element 50 can enter or exit the first movable slot 11 or the second movable slot 12. When the locking element 50 enters the first movable slot 11 or the second movable slot 12, the positioning plate 20 switches from the unlocked state to the locked state. Therefore, in this application, after the operator completes the adjustment of the positioning plate 20, the locking element 50 can be used to keep the positioning plate 20 in the adjusted position, thereby preventing the relative position of the positioning plate 20 and the corresponding first movable slot 11 or second movable slot 12 from changing during the measurement of cell parameters, thus affecting the measurement effect and ensuring the accuracy of the cell measuring device.

[0034] Specifically, the first movable groove 11 and the second movable groove 12 are respectively provided with limiting flanges 13 extending in a direction close to each other on both sides of their length direction. At least one of the limiting flanges 13 has at least one locking hole 131 that cooperates with the locking member 50. The locking member 50 can enter the first movable groove 11 or the second movable groove 12 through the locking hole 131 and abut against the corresponding positioning block 21, so that the positioning plate 20 is kept in a locked state. Figure 2 and Figure 5As shown, by setting the limiting flange 13, not only can the positioning block 21 of the positioning plate 20 be prevented from disengaging from the corresponding first movable groove 11 or second movable groove 12, but the limiting flange 13 can also provide the setting position of the locking hole 131, thereby ensuring that the locking member 50 can pass through the limiting flange 13 through the locking hole 131 and extend into the first movable groove 11 or second movable groove 12 to lock the positioning block 21 of the positioning plate 20. In one specific embodiment of this application, regarding the method of preventing the positioning block 21 from disengaging from the corresponding first movable groove 11 or second movable groove 12 by limiting flanges 13, the two adjacent limiting flanges 13 on the first movable groove 11 or second movable groove 12 can form an inverted T-shaped groove that is narrower at the top and wider at the bottom. At this time, the shape of the positioning block 21 is adapted to the inverted T-shaped groove, or in other words, the cross-sectional shape of the positioning block 21 is an inverted T-shape adapted to the inverted T-shaped groove. This ensures that the positioning block 21 can slide along the first movable groove 11 or second movable groove 12 without disengaging from the first movable groove 11 or second movable groove 12 through the gap between the two limiting flanges 13. Furthermore, this also ensures that the locking member 50 can contact the portion of the positioning block 21 located below the limiting flange 13 after passing through the locking hole 131, thereby achieving locking and unlocking of the positioning block 21.

[0035] Furthermore, in this application, there are multiple locking holes 131 on the limiting flange 13. The multiple locking holes 131 are spaced apart along the length direction of the corresponding first movable groove 11 or second movable groove 12, thereby ensuring that the locking member 50 can cooperate with different locking holes 131 to lock the positioning plate 20 in different positions. This enables the adjustment of the size of the cell positioning space 30 and the tab positioning space 40 of the cell measuring device, so as to ensure that the cell measuring device can measure cells with different size parameters.

[0036] In this application, the locking element 50 can be a bolt, and the locking hole 131 can have an internal thread that mates with the bolt. This allows the positioning block 21 of the locking plate to be pressed into different positions in its corresponding first movable groove 11 or second movable groove 12 through the engagement of the bolt and different locking holes 131. Of course, in this application, the specific structure and engagement method of the locking element 50 and the locking hole 131 can be adaptively adjusted according to the actual design and usage, at least ensuring that the locking element 50 can lock and unlock the positioning plate 20.

[0037] Optionally, there is one first movable slot 11 and two second movable slots 12, which are respectively the first sub-movable slot 121 and the second sub-movable slot 122. The first sub-movable slot 121 passes through the first movable slot 11, and the second sub-movable slot 122 is set at one end of the length direction of the first movable slot 11. Four positioning plates 20 are set on the second sub-movable slot 122. In the length direction of the second sub-movable slot 122, the four positioning plates 20 are arranged at intervals and are the first positioning plate, the second positioning plate, the third positioning plate and the fourth positioning plate in sequence. The first positioning plate and the second positioning plate adjacent to it form a tab positioning space 40, and the third positioning plate and the fourth positioning plate adjacent to it form another tab positioning space.

[0038] In a preferred embodiment of this application, there is one first movable slot 11 and two second movable slots 12, which are respectively a first sub-movable slot 121 and a second sub-movable slot 122. The first sub-movable slot 121 passes through the first movable slot 11, and the second sub-movable slot 122 is disposed at one end of the first movable slot 11 along its length. A positioning plate 20 is disposed on each side of the first sub-movable slot 121 corresponding to the first movable slot 11, and two positioning plates 20 are disposed on each side of the second sub-movable slot 122 corresponding to the first movable slot 11. In this embodiment, the first movable slot 11 contains one positioning plate 20, which, together with the two positioning plates 20 of the first sub-movable slot 121, forms a cell positioning space 30. The positioning plate 20 in the first movable slot 11 is used to position the tail of the cell, and the two positioning plates 20 of the first sub-movable slot 121 are used to position the two sides of the cell. Furthermore, four positioning plates 20 are provided on the second sub-movable slot 122; in the extending direction of the first sub-movable slot 121, two positioning plates 20 are located on one side of the first movable slot 11 and form a tab positioning space 40, while the other two positioning plates 20 are located on the other side of the first movable slot 11 and form another tab positioning space 40. That is to say, in this embodiment, the four positioning plates 20 in the second sub-movable slot 122 form two tab positioning spaces 40. Moreover, the two positioning plates 20 forming the tab positioning spaces 40 respectively position the two sides of the same tab.

[0039] Preferably, a set of opposing inner sidewalls of the second sub-movable slot 122 are provided with limiting protrusions 1221 extending in a direction of approaching each other, so as to divide the second sub-movable slot 122 into slides that are interconnected and spaced apart along the depth direction of the second sub-movable slot 122, and the two positioning plates 20 that form the same electrode positioning space 40 are respectively located in different slides of the second movable slot 122. With this arrangement, it can be ensured that the positioning blocks 21 of the two positioning plates 20 that form the same electrode positioning space 40 will not interfere with each other in the second sub-movable slot 122 during the adjustment process, thereby ensuring the performance of the cell measuring device.

[0040] Specifically, in this application, since the positioning plate 20 located in the first sub-movable slot 121 positions the side of the battery cell, while the positioning plate 20 located in the second sub-movable slot 122 positions the corresponding electrode of the battery cell, the length of the positioning plate 20 located in the first sub-movable slot 121 can be set to be greater than the length of the positioning plate 20 located in the second sub-movable slot 122. More specifically, the length of the stop block 22 of the positioning plate 20 located in the first sub-movable slot 121 is greater than the length of the stop block 22 of the positioning plate 20 located in the second sub-movable slot 122.

[0041] Preferably, scales 60 are respectively provided on the periphery of the first movable slot 11 and the periphery of the second movable slot 12. This arrangement ensures that operators can more accurately record and judge the dimensional parameters of the battery cell under test. Furthermore, by setting the scales 60 in this application, operators can directly visualize and quickly judge the battery cell, reducing measurement uncertainties caused by the measurement process, and reducing the risks of electrode leakage, electrode tearing, and tray interference caused by abnormal material flow.

[0042] Optionally, in the length direction of the first movable slot 11, there is a clearance gap between the adjacent ends of the stops 22 of any two positioning plates 20 corresponding to two adjacent second movable slots 12. In other words, the projections of the stops 22 of any two positioning plates 20 not in the same second movable slot 12 in the length direction of the second movable slot 12 do not overlap. This arrangement ensures that when adjusting the positioning plates 20 in different second movable slots 12, there will be no interference between the stops 22 of the corresponding positioning plates 20 in different second movable slots 12, thus ensuring that the operator can more smoothly adjust the size of the cell positioning space 30 and the tab positioning space 40. Preferably, the length direction of the stops 22 of the positioning plates 20 in the second movable slot 12 is the same as the length direction of the first movable slot 11.

[0043] Optionally, at least one end of the first movable groove 11 and / or the second movable groove 12 communicates with one side of the mounting plate 10. In this case, the corresponding position of the side of the mounting plate 10 communicating with the first movable groove 11 or the second movable groove 12 has an installation notch, and the positioning plate 20 enters the interior of the first movable groove 11 or the second movable groove 12 through the installation notch. This arrangement ensures that the positioning plate 20 can be more easily installed into the corresponding first movable groove 11 or the second movable groove 12. That is, in this application, when assembling the mounting plate 10 and the positioning plate 20, the positioning plate 20 is installed into the interior of the first movable groove 11 and / or the second movable groove 12 through the side of the mounting plate 10 communicating with the first movable groove 11 or the second movable groove 12. The limiting flanges 13 around the periphery of the first movable groove 11 and the second movable groove 12 effectively prevent the positioning plate 20 from being removed from other positions of the first movable groove 11 or the second movable groove 12.

[0044] When using the cell measuring device of this application to measure the cell, such as Figure 4 As shown, the outer edge distance m of the positive electrode tab 71 of the battery cell 70 is required to be within the range of m1 to m2. The inner edge distance n of the positive electrode tab 71 is required to be within the range of n1 to n2. The outer edge distance t of the negative electrode tab 72 is required to be within the range of t1 to t2. The inner edge distance k of the negative electrode tab 72 is required to be within the range of k1 to k2. Where n2 > n1 > m2 > m1. The edge distance requirement of the negative electrode tab is k2 > k1 > t2 > t1. The edge distances of the positive and negative electrodes can be defined according to the design requirements and can be interchanged as needed.

[0045] like Figure 3 The diagram shows a top view of the battery cell placed in the battery cell measuring device. Based on the requirements of the battery cell's dimensions (length w, height h, and the distances between the positive and negative tabs m, n, t, k), the positioning plate 20 of the battery cell measuring device is adjusted. Specifically, the positioning plate 20 in the first movable slot 11 is adjusted to abut against the bottom surface of the battery cell 70. According to the scale 60 on the first sub-movable slot 121, the two positioning plates 20 in the first sub-movable slot 121 are adjusted left and right to abut against the two sides of the battery cell 70. Finally, the four positioning plates 20 in the second sub-movable slot 122 (along the extension direction of the first sub-movable slot 121, the four positioning plates 20 corresponding to the second sub-movable slot 122 are sequentially labeled as: first plate, second plate, third plate, and fourth plate) are adjusted so that the first plate and second plate are aligned with the two sides of the positive (or negative) tab, and the third and fourth plates are aligned with the two sides of the negative (or positive) tab, respectively. Then, using a scale 60, the cell width W, height h, and the distances between the positive and negative tabs m, n, t, and k can be measured.

[0046] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0047] 1. Effectively solves the problems of poor measurement effect and inconvenience of cell edge distance parameter in existing technologies;

[0048] 2. Simple structure and stable performance.

[0049] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0050] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery cell measuring device, characterized in that, include: Mounting plate (10), wherein at least one first movable groove (11) and at least two spaced second movable grooves (12) are provided on the mounting plate (10), and the extending directions of the first movable groove (11) and the second movable grooves (12) are perpendicular to each other; The positioning component includes multiple positioning plates (20). At least one positioning plate (20) is movably disposed in the first movable slot (11), and at least two positioning plates (20) are disposed in each second movable slot (12). The positioning plate (20) corresponding to the first movable slot (11) and the positioning plate (20) corresponding to one of the second movable slots (12) form a cell positioning space (30), and at least two positioning plates (20) corresponding to the other second movable slot (12) form a tab positioning space (40).

2. The cell measuring device according to claim 1, characterized in that, The positioning plate (20) includes: Positioning block (21), at least a portion of which is movably disposed in the corresponding first movable slot (11) or second movable slot (12) and is capable of moving along the corresponding first movable slot (11) or second movable slot (12); A stop block (22) is provided outside the corresponding first movable slot (11) or second movable slot (12) and connected to the positioning block (21), and the positioning plate (20) forms the cell positioning space (30) or the tab positioning space (40) through the stop block (22).

3. The cell measuring device according to claim 2, characterized in that, The positioning plate (20) has a locked state and an unlocked state. When the positioning plate (20) is in the unlocked state, the positioning block (21) can move along the first movable groove (11) or the second movable groove (12). The cell measuring device also includes multiple locking elements (50). Each positioning block (21) is respectively provided with a locking element (50). The locking element (50) can enter or exit the first movable groove (11) or the second movable groove (12). When the locking element (50) enters the first movable groove (11) or the second movable groove (12), the positioning plate (20) switches from the unlocked state to the locked state.

4. The cell measuring device according to claim 3, characterized in that, The first movable groove (11) and the second movable groove (12) are respectively provided with limiting flanges (13) extending in a direction close to each other on both sides of the length direction. At least one of the limiting flanges (13) has at least one locking hole (131) that cooperates with the locking member (50). The locking member (50) can enter the first movable groove (11) or the second movable groove (12) through the locking hole (131) and abut against the corresponding positioning block (21) so that the positioning plate (20) is kept in the locked state.

5. The cell measuring device according to any one of claims 1 to 4, characterized in that, There is one first movable slot (11) and two second movable slots (12), which are respectively a first sub-movable slot (121) and a second sub-movable slot (122). The first sub-movable slot (121) passes through the first movable slot (11). The second sub-movable slot (122) is set at one end of the length direction of the first movable slot (11). The first sub-movable slot (121) is provided with a positioning plate (20) on each side of the first movable slot (11), and the second sub-movable slot (122) is provided with four positioning plates (20).

6. The cell measuring device according to claim 5, characterized in that, In the extending direction of the first sub-movable groove (121), two positioning plates (20) are located on one side of the first movable groove (11) and form one of the tab positioning spaces (40), and two other positioning plates (20) are located on the other side of the first movable groove (11) to form another tab positioning space (40).

7. The cell measuring device according to claim 5, characterized in that, The inner walls of the second sub-movable groove (122) are provided with a set of opposing inner walls, which are provided with limiting protrusions (1221) extending in the direction of mutual approach, so as to divide the second sub-movable groove (122) into slides that are interconnected and spaced apart along the depth direction of the second sub-movable groove (122). The two positioning plates (20) that form the same electrode positioning space (40) are respectively located in different slides of the second movable groove (12).

8. The cell measuring device according to claim 5, characterized in that, The length of the positioning plate (20) located in the first sub-movable slot (121) is greater than the length of the positioning plate (20) located in the second sub-movable slot (122).

9. The cell measuring device according to any one of claims 1 to 4, characterized in that, The periphery of the first movable groove (11) and the periphery of the second movable groove (12) are respectively provided with scales (60).

10. The cell measuring device according to any one of claims 1 to 4, characterized in that, Along the length of the first movable slot (11), there is a clearance between the ends of any two positioning plates (20) corresponding to two adjacent second movable slots (12) that are close to each other; and / or At least one end of the first movable groove (11) and / or the second movable groove (12) is connected to one side of the mounting plate (10).

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