Novel pole piece flexibility detection mechanism

Abstract

The utility model discloses a novel pole piece flexibility detection mechanism can simplify operation, improve detection precision, and it includes work table, pressure sensor, displacement sensor, fixed base, sliding seat, drive arrangement, first clamping seat, second clamping seat and guide assembly, pressure sensor, displacement sensor all are installed on work table, fixed base is installed on pressure sensor stress end, sliding seat is slid on work table and is driven to realize relative movement with fixed base by drive arrangement, and displacement sensor detects the moving distance of sliding seat, first clamping seat holds pole piece one end, and one end is hinged on fixed base, and the other end side is equipped with first guide shaft, second clamping seat holds pole piece other end, and one end is hinged on sliding seat, and the other end side is equipped with second guide shaft, and guide assembly has two path grooves for first, second guide shaft sliding cooperation respectively, under the common effect of drive arrangement and path groove, first, second clamping seat synchronous overturns and switches between both coplanar and parallel state.

Description

Technical Field

[0001] This utility model belongs to the field of electrode flexibility testing technology, and specifically refers to a novel electrode flexibility testing mechanism. Background Technology

[0002] Electrode tortuosity is a key parameter describing the complexity of the internal pore structure of an electrode, directly affecting the lithium-ion transport efficiency within the electrode. Higher tortuosity results in a more tortuous ion transport path, significantly impacting battery cycle life, rate performance, and capacity retention. Electrode tortuosity influences ion transport kinetics, material utilization uniformity, and thermal stability, becoming a core factor determining battery lifespan. Optimizing tortuosity requires a multi-dimensional approach, addressing materials, processes, and structure to balance porosity, mechanical strength, and manufacturing cost, achieving a balance between high energy density and long lifespan. In the future, with advancements in in-situ detection technology and multi-scale modeling, precise control of tortuosity will become a key breakthrough in the development of next-generation batteries.

[0003] Electrode flexibility is a crucial parameter affecting the tortuosity of the electrode in a shaped battery. It determines the state of the electrode after it is bent or even folded into a specific shape, and involves the external reaction force generated after the electrode is deformed.

[0004] In existing technologies, the electrode sheets are mainly bent into a U-shape manually and then placed on the positioning fixture of the testing instrument before testing begins. In reality, U-shaped electrode sheets are assembled into the battery cell through mechanized processes. The manual bending method cannot perfectly simulate the actual state of the electrode sheets in the battery cell and is easily affected by factors such as human operating experience and techniques, leading to deviations in the test results. At the same time, the operation process of "bending the electrode sheets first and then transferring them to the testing instrument" is relatively cumbersome and not convenient or automated enough. Utility Model Content

[0005] The main purpose of this invention is to provide a novel electrode flexibility testing mechanism that solves the problems existing in the prior art. It can simplify the operation and improve the testing accuracy, and the operator only needs to perform the step of placing the electrode.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A novel electrode flexibility testing mechanism includes a worktable, a pressure sensor, a displacement sensor, a fixed base, a sliding base, a driving device, a first clamp, a second clamp, and a guide assembly. The pressure sensor and displacement sensor are both mounted on the worktable. The fixed base is mounted on the force-bearing end of the pressure sensor. The sliding base is slidably fitted onto the worktable and driven by the driving device to achieve relative movement with the fixed base. The displacement sensor detects the movement distance of the sliding base. The first clamp is used to clamp one end of the electrode, with one end pivotally connected to the fixed base and a first guide shaft provided on the side of the other end. The second clamp is used to clamp the other end of the electrode, with one end pivotally connected to the sliding base and a second guide shaft provided on the side of the other end. The guide assembly has two path grooves for sliding engagement of the first and second guide shafts, respectively. Under the combined action of the driving device and the path grooves, the first and second clamps synchronously rotate and switch between coplanar and parallel states.

[0008] The guiding assembly includes a first guide plate and a second guide plate; the first guide plate is fixed relative to the sliding seat and is provided with a first path groove for sliding engagement with the first guide shaft; the second guide plate is installed on the side of the worktable and is provided with a second path groove for sliding engagement with the second guide shaft; the first path groove and the second path groove are arranged symmetrically from left to right.

[0009] Preferably, the first path groove and the second path groove are both 1 / 4 circular arc grooves, with their inner arc surfaces facing each other, and the lower ends of the first path groove and the second path groove extend horizontally and connect to the side of the corresponding guide plate, forming the first opening and the second opening respectively.

[0010] Preferably, both the first opening and the second opening are flared openings with a smaller inner end and a larger outer end.

[0011] Preferably, a first roller and a second roller are respectively mounted on the first guide shaft and the second guide shaft.

[0012] A grating head is fixed to the side of the sliding seat near the displacement sensor, and the grating head is movably fitted inside the displacement sensor.

[0013] The driving device is a screw motor, and its screw is threadedly connected to a nut provided on the sliding seat.

[0014] The upper surface of the workbench is provided with a pair of slide rails, and the bottom sides of the sliding seat are respectively provided with sliders that slide in cooperation with the slide rails.

[0015] Two position sensors are provided on the workbench to detect whether the sliding seat has moved to the first position and the second position. The first position and the second position correspond to the first clamp and the second clamp being flipped to a coplanar state and the first clamp and the second clamp being flipped to a parallel state, respectively.

[0016] The upper ends of the fixed seat and the sliding seat are respectively provided with a first rotating shaft and a second rotating shaft. One end of the first clamp and the second clamp are respectively rotatably fitted on the first rotating shaft and the second rotating shaft. A first torsion spring is sleeved on the first rotating shaft, and a second torsion spring is sleeved on the second rotating shaft. The two ends of the first torsion spring abut against the fixed seat and the first clamp respectively, for driving the first clamp to return to a vertical state. The two ends of the second torsion spring abut against the sliding seat and the second clamp respectively, for driving the second clamp to return to a vertical state.

[0017] The first clamping seat includes a first clamping plate for supporting the electrode sheet, and a plurality of first clamping claws elastically engaged on the upper surface of the first clamping plate; the second clamping seat includes a second clamping plate for supporting the electrode sheet, and a plurality of second clamping claws elastically engaged on the upper surface of the second clamping plate.

[0018] Preferably, the end of the first clamping plate is movably fitted with a first clamping block and fixed with a first limiting block; the first clamping block is provided with a first gripper and at least one first guide groove, the extension direction of the first guide groove being perpendicular to the upper surface of the first clamping plate; the first limiting block is provided with a first limiting post embedded in the first guide groove; a first bolt is provided in the extension direction of the first guide groove, a first spring is sleeved on the first bolt, and the two ends of the first spring respectively abut against the end wall of the first guide groove away from the first gripper and the first limiting post; the end of the second clamping plate is movably fitted with a second clamping block and fixed with a second limiting block; the second clamping block is provided with a second gripper and at least one second guide groove, the extension direction of the second guide groove being perpendicular to the upper surface of the second clamping plate; the second limiting block is provided with a second limiting post embedded in the second guide groove; a second bolt is provided in the extension direction of the second guide groove, a second spring is sleeved on the second bolt, and the two ends of the second spring respectively abut against the end wall of the second guide groove away from the second gripper and the second limiting post.

[0019] Preferably, a first lifting rod and a second lifting rod are respectively provided on the opposite surfaces of the fixed seat and the sliding seat; when the first clamping seat and the second clamping seat are coplanar, the first lifting rod and the second lifting rod abut against the first clamping block and the second clamping block respectively to compress the first spring and the second spring. After adopting the above technical solution, this utility model has the following technical effects:

[0020] (1) This utility model realizes an automated electrode flexibility testing mechanism. It only requires manual clamping and fixing of the two ends of the electrode to the first clamp and the second clamp respectively. Then, the testing steps can be started by starting the drive device. The operation is very simple and the degree of automation is high.

[0021] (2) Under the combined action of the drive device and the path groove, the first clamp and the second clamp switch between the coplanar and parallel states. When they are in the coplanar state, it is convenient to manually place the electrode in the unbent state. After the drive device is started, the first clamp and the second clamp gradually flip from the coplanar state to the state of parallel to each other. During this process, the electrode can be bent into a U-shape. Since the flipping action of the two clamps is synchronous, it can better simulate the mechanical assembly process of the electrode, thereby ensuring that the working conditions of the electrode and the cell are close during the test and improving the detection accuracy.

[0022] (3) The specific testing process is that after the electrode is bent into a U-shape, the drive device continues to work and performs a compression test; the drive device continues to drive the sliding seat to move, and then the displacement sensor measures the displacement distance; during this process, the two clamps continue to reduce the distance and apply pressure to the electrode. The stress of the electrode bending process will be reflected on the pressure sensor, and finally the electrode flexibility is calculated based on the values ​​detected by the pressure sensor and the displacement sensor. Attached Figure Description

[0023] Figure 1 Three-dimensional representation of a specific embodiment of this utility model Figure 1 .

[0024] Figure 2 Three-dimensional representation of a specific embodiment of this utility model Figure 2 .

[0025] Figure 3 This is a top view of a specific embodiment of the present utility model.

[0026] Figure 4 for Figure 3 A partial structural cross-sectional view along the AA direction.

[0027] Figure 5 This is an exploded view of a specific embodiment of the present utility model.

[0028] Figure 6 This is an exploded view of the first clamp and the second clamp according to a specific embodiment of the present utility model.

[0029] Figure 7 This is a schematic diagram of the initial state of a specific embodiment of the present utility model.

[0030] Figure 8 This is a schematic diagram of the test state of a specific embodiment of the present invention.

[0031] Figure 9 The graph shows the test results of positive electrode sheets with different compaction densities.

[0032] Explanation of icon numbers:

[0033] 1-Workbench; 2-Pressure sensor; 3-Displacement sensor; 4-Fixed base; 41-First rotating shaft; 42-First torsion spring; 43-First lifting rod; 5-Sliding seat; 51-Slider; 52-Second rotating shaft; 53-Second torsion spring; 54-Second lifting rod; 6-Drive device; 61-Screw; 7-First clamp; 71-First guide shaft; 72-First roller; 73-First clamping plate; 74-First clamping block; 741-First gripper; 742-First guide groove; 75-First limiting block; 751-First limiting post; 76-First bolt; 77-First spring; 8-Second clamp; 8 1-Second guide shaft; 82-Second roller; 83-Second clamping plate; 84-Second clamping block; 841-Second gripper; 842-Second guide groove; 85-Second limiting block; 851-Second limiting post; 86-Second bolt; 87-Second spring; 9-Guide assembly; 91-First guide plate; 911-First path groove; 912-First opening; 92-Second guide plate; 921-Second path groove; 922-Second opening; 93-First bracket; 94-Second bracket; 10-Grate head; 20-Nut; 30-Slide rail; 40-Position sensor; 50-Light shield; a-Electrode. Detailed Implementation

[0034] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0035] refer to Figure 1-5 As shown, this utility model discloses a novel electrode flexibility testing mechanism, including a worktable 1, a pressure sensor 2, a displacement sensor 3, a fixed seat 4, a sliding seat 5, a driving device 6, a first clamp 7, a second clamp 8, and a guide assembly 9.

[0036] Pressure sensor 2 and displacement sensor 3 are both mounted on worktable 1;

[0037] The mounting base 4 is installed on the force-receiving end of the pressure sensor 2;

[0038] The sliding seat 5 is slidably fitted on the worktable 1 and is driven by the drive device 6 to achieve relative movement with the fixed seat 4. The displacement sensor 3 detects the movement distance of the sliding seat 5.

[0039] The first clamp 7 is used to clamp one end of the electrode a, one end of which is pivotally connected to the fixed base 4, and the other end is provided with a first guide shaft 71 on its side.

[0040] The second clamp 8 is used to clamp the other end of the electrode a. One end of the clamp is pivotally connected to the sliding seat 5, and the other end has a second guide shaft 81 on its side.

[0041] The guide assembly has two path grooves for sliding engagement of the first guide shaft 71 and the second guide shaft 81, respectively.

[0042] Under the combined action of the drive device 6 and the path groove, the first clamp 7 and the second clamp 8 achieve synchronous rotation and switch between coplanar and parallel states.

[0043] Through the above solution, this utility model realizes an automated electrode flexibility testing mechanism. It only requires manual clamping and fixing of both ends of electrode a to the first clamp 7 and the second clamp 8 respectively, followed by starting the drive device 4 to begin the testing process. The operation is very simple and highly automated. (Reference) Figure 6 and Figure 7 As shown, under the combined action of the drive device 6 and the path groove, the first clamp 7 and the second clamp 8 switch between coplanar and parallel states. When they are in the coplanar state, it is convenient to manually place the electrode sheet in the unbent state. After the drive device 6 is started, the first clamp 7 and the second clamp 8 gradually flip from the coplanar state to the state where they are parallel to each other. During this process, the electrode sheet can be bent into a U-shape. Since the flipping action of the two clamps is synchronous, it can better simulate the mechanical assembly process of the electrode sheet, thereby ensuring that the working conditions of the electrode sheet and the cell are close during the test, and improving the detection accuracy.

[0044] Furthermore, the specific testing process is as follows: after the electrode a is bent into a U-shape, the drive device 6 continues to work to perform a compression test; the drive device 6 continues to drive the sliding seat 5 to move, and then the displacement sensor 3 measures the displacement distance; during this process, the two clamps continue to reduce the distance and apply pressure to the electrode a. The stress of the electrode a bending process will be reflected on the pressure sensor 2. Finally, the electrode flexibility is judged based on the values ​​detected by the pressure sensor 2 and the displacement sensor 3.

[0045] The following are specific embodiments of the present invention.

[0046] In this embodiment, with the length direction of the workbench 1 as a reference, the pressure sensor 2 is disposed at one end of the workbench 1, and the displacement sensor 3 is disposed on one side of the workbench 1, so as to minimize interference with the movement and flipping of components such as the sliding seat 5, the first clamp 7, and the second clamp 8. The pressure sensor 2 can be a cantilever beam load cell.

[0047] The aforementioned guide assembly 9 includes a first guide plate 91 and a second guide plate 92. The first guide plate 91 is fixed relative to the sliding seat 5 and is provided with a first path groove 911 for sliding engagement with the first guide shaft 71. The second guide plate 92 is installed on the side of the worktable 1 and is provided with a second path groove 921 for sliding engagement with the second guide shaft 81. In a side view, the first path groove 911 and the second path groove 921 are arranged symmetrically to ensure that the flipping action of the first clamp 7 and the second clamp 8 is synchronized. In this embodiment, since the first guide plate 91 is fixed relative to the sliding seat 5 and moves synchronously, the first guide plate 91 and the second guide plate 92 are set in a staggered state along the length of the worktable 1 to avoid interference. In this embodiment, the aforementioned guide assembly 9 also includes a first bracket 93 for fixing the first guide plate 91 and a second bracket 94 for fixing the second guide plate 92. The first bracket 93 is fixed to the side of the sliding seat 5, and the second bracket 94 is fixed to the side of the worktable 1.

[0048] Furthermore, both the first path groove 911 and the second path groove 921 are 1 / 4 circular arc grooves, with their inner arc surfaces facing each other. The lower ends of both the first path groove 911 and the second path groove 921 extend horizontally and connect to the side of the corresponding guide plate, forming the first opening 912 and the second opening 922, respectively. Since the first path groove 911 and the second path groove 921 extend horizontally to the side of the corresponding guide plate, when the electrode a is bent into a U-shape, the first clamp 7 and the second clamp 8 can maintain a parallel state even as they continue to move towards each other, applying uniform pressure to both ends of the electrode a.

[0049] Secondly, both the first opening 912 and the second opening 922 are flared openings with smaller inner ends and larger outer ends, which facilitates the reset of the first guide shaft 71 and the second guide shaft 81 to enter the first path groove 911 and the second path groove 921.

[0050] In addition, the first guide shaft 71 and the second guide shaft 81 are respectively equipped with a first roller 72 and a second roller 82, which can reduce the friction with the corresponding path groove by rolling, making the rotation of the first clamp 7 and the second clamp 8 smoother.

[0051] The sliding seat 5 is fixed with a grating head 10 on the side near the displacement sensor 3. The grating head 10 is movably fitted inside the displacement sensor 3 to detect the displacement and output data.

[0052] The aforementioned drive device 6 is a spindle motor, capable of precise displacement output. Its spindle 61 is threadedly connected to a nut 20 mounted on the sliding seat 5. Thus, when the motor operates, it can drive the sliding seat 5 to move horizontally. In this embodiment, the aforementioned fixed seat 4 and drive device 6 are respectively installed at both ends of the worktable 1 along its length.

[0053] The upper surface of the workbench 1 is provided with a pair of slide rails 30, and the bottom sides of the sliding seat 5 are respectively provided with sliders 51 that slide in cooperation with the slide rails 30. Through the guidance of the slide rails 30 and sliders 51, the sliding seat 5 can be ensured to move along a straight line, thereby improving working stability.

[0054] Two position sensors 40 are installed on the workbench 1 to detect whether the sliding seat 5 has moved to a first position and a second position. The first position and the second position correspond to the first clamp 7 and the second clamp 8 being flipped to a coplanar state and the first clamp 7 and the second clamp 8 being flipped to a parallel state, respectively. In this embodiment, the position sensors 40 are photoelectric sensors, and light-shielding members 50 are installed on the sliding seat 5, which are respectively opposite to the two position sensors 40. By accurately determining the position state of the sliding seat 5, the automated process can be executed accurately, thereby obtaining more accurate detection results.

[0055] The upper ends of the fixed seat 4 and the sliding seat 5 are respectively provided with a first rotating shaft 41 and a second rotating shaft 52. One end of the first clamp 7 and the second clamp 8 are rotatably engaged with the first rotating shaft 41 and the second rotating shaft 52, respectively. A first torsion spring 42 is sleeved on the first rotating shaft 41, and a second torsion spring 53 is sleeved on the second rotating shaft 52. The two ends of the first torsion spring 42 abut against the fixed seat 4 and the first clamp 7, respectively, to drive the first clamp 7 to return to the vertical state. The two ends of the second torsion spring 53 abut against the sliding seat 5 and the second clamp 8, respectively, to drive the second clamp 8 to return to the vertical state. After the driving device 6 starts to operate, the first clamp 7 and the second clamp 8 gradually flip from the horizontal state (both are coplanar) to the vertical state (both are parallel) under the combined action of their respective path grooves and torsion springs. The torsion springs can provide auxiliary power.

[0056] refer to Figure 6 As shown, the first clamping seat 7 includes a first clamping plate 73 for supporting the electrode a, and a plurality of first clamping claws 741 elastically engaged with the upper surface of the first clamping plate 73; the second clamping seat 8 includes a second clamping plate 83 for supporting the electrode a, and a plurality of second clamping claws 841 elastically engaged with the upper surface of the second clamping plate 83. By the cooperation of the first clamping plate 73 and the first clamping claws 741, and the cooperation of the second clamping plate 83 and the second clamping claws 841, the two ends of the electrode a can be clamped.

[0057] Furthermore, the end of the aforementioned first clamping plate 73 is movably fitted with a first clamping block 74, and a first limiting block 75 is fixed thereon; the first clamping block 74 is provided with the aforementioned first clamping claw 741, and at least one first guide groove 742, the extension direction of the first guide groove 742 being perpendicular to the upper surface of the first clamping plate 73; the first limiting block 75 is provided with a first limiting post 751 embedded in the first guide groove 742; a first bolt 76 is provided in the extension direction of the first guide groove 742, and a first spring 77 is sleeved on the first bolt 76, the two ends of the first spring 77 respectively abutting against the end wall of the first guide groove 742 away from the first clamping claw 741 and the first limiting post 751. Thus, under the action of the first spring 77, the first clamping claw 741 is brought close to the first clamping plate 73 by the elastic force, so as to clamp the end of the electrode a. Similarly, the end of the second clamping plate 83 is movably fitted with a second clamping block 84 and a second limiting block 85 is fixed thereon; the second clamping block 84 is provided with the second clamping claw 841 and at least one second guide groove 842, the extension direction of the second guide groove 842 is perpendicular to the upper surface of the second clamping plate 83; the second limiting block 85 is provided with a second limiting post 851 embedded in the second guide groove 842; a second bolt 86 is provided in the extension direction of the second guide groove 842, and a second spring 87 is sleeved on the second bolt 86, the two ends of the second spring 87 respectively abut against the end wall of the second guide groove 842 away from the second clamping claw 841 and the second limiting post 851.

[0058] Secondly, the opposite surfaces of the fixed seat 4 and the sliding seat 5 are respectively provided with a first lifting rod 43 and a second lifting rod 54. When the first clamp 7 and the second clamp 8 are in a coplanar state (i.e. both are in a horizontal state), the first lifting rod 43 and the second lifting rod 54 respectively abut against the first clamp 74 and the second clamp 84 to compress the first spring 77 and the second spring 87, thereby resisting the elastic force of the spring and separating the jaws from the corresponding clamping plates, automatically opening the jaws. This means that the first jaw 741 and the second jaw 841 are in an open state with the first clamping plate 73 and the second clamping plate 83 respectively, making it convenient to insert the electrode a without having to manually pry open the first jaw 741 / second jaw 841.

[0059] refer to Figure 7-8 As shown, the working principle of this utility model is as follows:

[0060] (1) The sliding seat 5 is in the initial position, and the first clamp 7 and the second clamp 8 are both in a horizontal state and are coplanar; the operator does not need to bend the electrode a, but can directly clamp its two ends onto the first clamp 7 and the second clamp 8 respectively;

[0061] (2) After the drive device 6 is started, the sliding seat 5 and the first guide plate 91 move toward the fixed seat 4. Since the first path groove 911 of the first guide plate 91 and the second path groove 921 of the second guide plate 92 are symmetrical, the first clamp 7 and the second clamp 8 begin to flip synchronously. Specifically, the adjacent ends of the two flip downwards, so that the first clamp 7 and the second clamp 8 flip from a coplanar state to a parallel state. During the flipping of the two clamps, the electrode a is also gradually bent into a U-shape. After the position sensor 40 detects that the sliding seat 5 has moved to the second position, the drive device 6 stops first (or the output power can be changed to directly perform the following compression test).

[0062] (3) After electrode a is bent into a U-shape, the drive device 6 continues to work to perform a compression test; the drive device 6 continues to move the sliding seat 5, and the displacement sensor 3 measures the displacement distance; during this process, the two clamps continue to reduce the distance, applying pressure to both ends of electrode a. The stress generated by electrode a after being subjected to force will be reflected on the pressure sensor 2. Finally, the values ​​detected by the pressure sensor 2 and the displacement sensor 3 are used to determine whether the flexibility of the electrode meets the requirements. Specifically, there is stress release during the pressure test of electrode a. This stress release mainly comes from the cracking of the coating on the surface of electrode a; generally speaking, the shorter the displacement required for electrode a to break, the worse the bendability of electrode a, that is, the worse the flexibility. Reference Figure 9 As shown, the test results of electrodes with different compaction densities are presented. It can be seen that the larger the compaction density of the electrode, the smaller the corresponding compression displacement, indicating that its flexibility is worse.

[0063] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A novel electrode flexibility testing mechanism, characterized in that: It includes a worktable, pressure sensor, displacement sensor, fixed base, sliding base, drive device, first clamp, second clamp and guide assembly; Both the pressure sensor and the displacement sensor are mounted on the worktable; The mounting base is installed on the force-receiving end of the pressure sensor; The sliding seat is slidably fitted on the worktable and driven by the driving device to achieve relative movement with the fixed seat. The displacement sensor detects the movement distance of the sliding seat. The first clamp is used to clamp one end of the electrode sheet, one end of which is pivotally connected to the fixed base, and the other end is provided with a first guide shaft on its side; the second clamp is used to clamp the other end of the electrode sheet, one end of which is pivotally connected to the sliding base, and the other end is provided with a second guide shaft on its side. The guide assembly has two path grooves for sliding engagement with the first guide shaft and the second guide shaft, respectively. Under the combined action of the drive device and the path groove, the first clamp and the second clamp are synchronously rotated and switch between coplanar and parallel states.

2. The novel electrode flexibility testing mechanism as described in claim 1, characterized in that: The guiding assembly includes a first guide plate and a second guide plate; the first guide plate is fixed relative to the sliding seat and is provided with a first path groove for sliding engagement with the first guide shaft; the second guide plate is installed on the side of the worktable and is provided with a second path groove for sliding engagement with the second guide shaft; the first path groove and the second path groove are arranged symmetrically from left to right.

3. The novel electrode flexibility testing mechanism as described in claim 2, characterized in that: Both the first path groove and the second path groove are 1 / 4 circular arc grooves, with their inner arc surfaces facing each other. The lower ends of both the first path groove and the second path groove extend horizontally and connect to the side of the corresponding guide plate, forming the first opening and the second opening respectively.

4. The novel electrode flexibility testing mechanism as described in claim 3, characterized in that: Both the first opening and the second opening are flared openings with a smaller inner end and a larger outer end.

5. The novel electrode flexibility testing mechanism as described in claim 2, characterized in that: A first roller and a second roller are respectively mounted on the first guide shaft and the second guide shaft.

6. The novel electrode flexibility testing mechanism as described in claim 1, characterized in that: A grating head is fixed to the side of the sliding seat near the displacement sensor, and the grating head is movably fitted inside the displacement sensor.

7. The novel electrode flexibility testing mechanism as described in claim 1, characterized in that: The driving device is a screw motor, and its screw is threadedly connected to a nut provided on the sliding seat.

8. The novel electrode flexibility testing mechanism as described in claim 1, characterized in that: The upper surface of the workbench is provided with a pair of slide rails, and the bottom sides of the sliding seat are respectively provided with sliders that slide in cooperation with the slide rails.

9. The novel electrode flexibility testing mechanism as described in claim 1, characterized in that: Two position sensors are provided on the workbench to detect whether the sliding seat has moved to the first position and the second position. The first position and the second position correspond to the first clamp and the second clamp being flipped to a coplanar state and the first clamp and the second clamp being flipped to a parallel state, respectively.

10. The novel electrode flexibility testing mechanism as described in claim 1, characterized in that: The upper ends of the fixed seat and the sliding seat are respectively provided with a first rotating shaft and a second rotating shaft. One end of the first clamp and the second clamp are respectively rotatably fitted on the first rotating shaft and the second rotating shaft. A first torsion spring is sleeved on the first rotating shaft, and a second torsion spring is sleeved on the second rotating shaft. The two ends of the first torsion spring abut against the fixed seat and the first clamp respectively, for driving the first clamp to return to a vertical state. The two ends of the second torsion spring abut against the sliding seat and the second clamp respectively, for driving the second clamp to return to a vertical state.

11. The novel electrode flexibility testing mechanism as described in claim 1, characterized in that: The first clamping seat includes a first clamping plate for supporting the electrode sheet, and a plurality of first clamping claws elastically engaged on the upper surface of the first clamping plate; the second clamping seat includes a second clamping plate for supporting the electrode sheet, and a plurality of second clamping claws elastically engaged on the upper surface of the second clamping plate.

12. The novel electrode flexibility testing mechanism as described in claim 11, characterized in that: The first clamping plate has a first clamping block movably fitted at its end and a first limiting block fixed thereon; the first clamping block is provided with the first clamping claw and at least one first guide groove, the extension direction of the first guide groove being perpendicular to the upper surface of the first clamping plate; the first limiting block is provided with a first limiting post embedded in the first guide groove; a first bolt is provided in the extension direction of the first guide groove, and a first spring is sleeved on the first bolt, the two ends of the first spring respectively abutting against the end wall of the first guide groove away from the first clamping claw and the first limiting post; The end of the second clamping plate is movably fitted with a second clamping block and fixed with a second limiting block; the second clamping block is provided with a second gripper and at least one second guide groove, the extension direction of the second guide groove being perpendicular to the upper surface of the second clamping plate; the second limiting block is provided with a second limiting post embedded in the second guide groove; a second bolt is provided in the extension direction of the second guide groove, and a second spring is sleeved on the second bolt, the two ends of the second spring respectively abutting the end wall of the second guide groove away from the second gripper and the second limiting post.

13. The novel electrode flexibility testing mechanism as described in claim 12, characterized in that: The opposite surfaces of the fixed seat and the sliding seat are respectively provided with a first lifting rod and a second lifting rod; when the first clamp and the second clamp are in a coplanar state, the first lifting rod and the second lifting rod abut against the first clamp and the second clamp respectively to compress the first spring and the second spring.

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