Tension control device for pole piece sampling

Abstract

The utility model discloses a pole piece sampling tension control device which comprises a first clamping part, a second clamping part and a switching assembly, the first clamping part comprises two first clamping arms which are arranged at intervals, the tension control device has a first state for clamping a pole piece and a second state for loosening the pole piece, and in the first state, the two first clamping arms are separated from each other. Constant clamping force is applied to the pole piece between the two first clamping arms through a spring, a magnet and the like, so that the stability of tension in the sampling process is ensured; after sampling is completed, the first clamping part and the second clamping part can be separated through the switching assembly, and the pole piece is loosened; by controlling the tension in the first state, the surface density of the pole piece at the edge of the sampling notch cannot be changed due to the change of the tension, so that a sample test result can accurately reflect the state and performance of the pole piece.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery pole piece production, and in particular relates to a pole piece sampling tension control device. Background Art

[0002] The consistency of the electrode often has a significant impact on the performance of the manufactured battery. Therefore, during the production process of the electrode, it is necessary to test the uniformity, consistency and other physical characteristics of the electrode to evaluate the quality of the electrode. Among them, the surface density is closely related to the battery performance. Electrodes with poor surface density consistency will lead to increased internal resistance of the battery, reduced charging and discharging efficiency, and accelerated formation of dendrites, reducing the service life of the battery.

[0003] At present, the test of pole pieces is usually carried out by cutting samples of a certain size in a certain area of the pole piece for testing. For the test of pole piece surface density, thickness and other performance, multi-point sampling is usually adopted, that is, testing is carried out at multiple different positions of a sample, and the consistency of the pole piece is judged by the difference in the results of multiple positions. However, in the actual sampling process, since the pole piece is stretched by tension, when the sample is cut, the tiny incision will directly lead to a significant change in the tension at the edge of the sample, and then there will be a difference between the surface density of the sample and the actual surface density of the pole piece, which is not conducive to the judgment of the consistency of the pole piece; and the change of tension at the incision in the actual sampling process may directly cause the pole piece to tear along the incision, and then break the belt, which significantly affects the production efficiency of the pole piece.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by the utility model is to solve one of the problems in the above-mentioned prior art, and to provide a pole piece sampling tension control device, which can keep the tension of the sampling area on the pole piece constant by clamping the pole piece, so that the edge of the incision will not be affected by the changing tension when cutting the sample, so that the test result of the sample can accurately reflect the performance of the pole piece.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a pole piece sampling tension control device, comprising a first clamping part, a second clamping part and a switching assembly, wherein the first clamping part comprises two first clamping arms arranged at intervals, and one end of the two first clamping arms is hinged to the second clamping part;

[0007] The first clamping part and the second clamping part have a first state of clamping the pole piece and a second state of releasing the pole piece, and in the first state, the first clamping part and the second clamping part apply a constant clamping force to the pole piece; the switching component is transmission-connected to the first clamping part and / or the second clamping part, and is used to control the first clamping part and the second clamping part to switch from the first state to the second state to release the clamping.

[0008] In the above solution, the pole piece is clamped by the first clamping part and the second clamping part, and the tension of the pole piece located between the first clamping arms is fixed. During the sampling process, the tension at the incision will not change, avoiding the reduction of consistency at the incision caused by the change of tension, and enabling the test results of the sample to more accurately reflect the actual state of the pole piece.

[0009] When clamping the pole piece with the force applied manually, affected by various factors such as the clamping device, the material and thickness of the pole piece, the clamping force applied each time is different, and even the clamping force during a single clamping process cannot be kept constant. It is impossible to fully fix the tension during the sampling process. By clamping the pole piece with a constant clamping force, on the one hand, it can ensure the stability of the tension during sampling, on the other hand, it can avoid damage to the pole piece due to excessive clamping force, and also avoid the inability to stably clamp the pole piece due to too small clamping force; as long as the technician controls the separation of the first clamping part and the second clamping part after the sampling is completed, there is no need to continuously apply the clamping force during the sampling process.

[0010] Furthermore, the first clamping part and the second clamping part have a first clamping surface and a second clamping surface that cooperate with each other to clamp the pole piece.

[0011] The switching component includes a driving rod penetrating the second clamping surface. The driving rod is movably arranged relative to the second clamping surface along the penetrating direction, and has a first position flush with the second clamping surface or recessed in the second clamping surface, and a second position where at least part of it protrudes from the second clamping surface and drives the first clamping part and the second clamping part to separate.

[0012] In the above solution, the technician can directly push the first clamping part and the second clamping part to separate through the driving rod, thereby realizing the switching of the tension control device from the first state to the second state; the operation is more convenient.

[0013] Furthermore, the switching component further includes a handheld unit connected to the second clamping part, and an operating unit hinged to the handheld unit;

[0014] The operating unit is separated from the hinge into an operating section away from the second clamping part and a transmission section close to the second clamping part. The transmission section is hinged to the driving rod on the side of the second clamping part away from the first clamping part.

[0015] Furthermore, the pole piece sampling tension control device further includes a locking unit provided on the first clamping part and / or the second clamping part, which is used to generate a stable clamping force between the first clamping part and the second clamping part in the first state;

[0016] The locking unit is a spring or a magnet.

[0017] With the above solution, the handheld unit enables the handheld tension control device to be more convenient during the sampling process. Through the operation unit, the switching between the first state and the second state can be achieved with one hand, leaving the other hand free to complete the sampling process, further improving the operation convenience.

[0018] Furthermore, the first clamping part includes two first clamping arms and a first connecting arm connecting the two clamping arms at one end.

[0019] At least one side of the two first clamping arms close to the second clamping part is located on the first clamping surface.

[0020] Furthermore, the first clamping part includes two first clamping arms and two first connecting arms. The two first connecting arms connect the two first clamping arms at both ends respectively, forming a closed sampling area.

[0021] Among the two first connecting arms, one is hinged to the second clamping part, and the other is located on the moving path of the driving rod.

[0022] In the above solution, the driving rod separates the first clamping part from the second clamping part through the first connecting arm far from the hinged end. Due to the relatively large distance from the hinged end, technicians can more easily separate the first clamping part and the second clamping part.

[0023] Furthermore, the second clamping part includes two second clamping arms and two second connecting arms. The two second connecting arms connect the two second clamping arms at both ends respectively, forming a closed sampling area.

[0024] Among the two second connecting arms, one is hinged to the first clamping part, and the other has a through hole for the driving rod to pass through.

[0025] In the above solution, the fixing of the driving rod is realized through the through hole, further improving the operation convenience of the tension control device.

[0026] Furthermore, a collecting unit is provided in the sampling area. The collecting unit is connected to the second clamping arm and the second connecting arm and is recessed from the second clamping surface in the direction away from the first clamping part.

[0027] Furthermore, the first clamping part and the second clamping part are respectively provided with a positioning rib and a positioning hole arranged oppositely. The positioning rib protrudes at least partially from the first clamping surface.

[0028] In the first state, the positioning rib and the positioning hole are in place.

[0029] Furthermore, the tension control device further includes an elastic layer, and the elastic layer at least partially covers the first clamping surface and / or the second clamping surface.

[0030] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art.

[0031] 1. The pole piece sampling tension control device clamps the pole piece with a stable clamping force provided by devices such as springs and magnets, fixes the sampling area by clamping the pole piece, and the sampling incision will not be torn due to the influence of tension, effectively avoiding the occurrence of pole piece breakage and improving the efficiency of pole piece preparation.

[0032] 2. By fixing the tension in the sampling area, the incision will not change due to the change of tension, and the sampling test result can more accurately reflect the actual state of the pole piece; after the sampling is completed, the technician only needs to control the first clamping part and the second clamping part to release the pole piece through the switching component, and no other additional operations are required during the sampling process, and can focus more on the sampling operation.

[0033] 3. Through the handheld unit and the operation unit, the technician can complete the grasping and control of the tension control device with one hand, which is convenient for sampling operation.

[0034] 4. The first clamping part is formed by the first clamping arm and the first connecting arm, and the second clamping part is formed by the second clamping arm and the second connecting arm. The positioning ribs and positioning holes are arranged at opposite positions on the first connecting arm and the second connecting arm. On the one hand, the positioning ribs and positioning holes ensure the alignment of the first clamping part and the second clamping part during clamping, and at the same time, it can also prevent the two from being misaligned and causing pole piece damage in the first state. Description of the Drawings

[0035] Figure 1 is a schematic structural diagram of the pole piece sampling tension control device described in Embodiment 1;

[0036] Figure 2 is Figure 1 an enlarged view of the position A shown;

[0037] Figure 3 is Figure 1 an enlarged view of the other side of the position A shown;

[0038] Figure 4 is a schematic structural diagram of the pole piece sampling tension control device described in Embodiment 2;

[0039] Figure 5 is a first schematic structural diagram of the pole piece sampling tension control device described in Embodiment 3;

[0040] Figure 6 is a schematic structural diagram of the pole piece sampling tension control device in the closed state described in Embodiment 4;

[0041] Figure 7 is Figure 6 a schematic structural diagram of the handheld unit and the operation unit shown;

[0042] Figure 8It is a schematic structural diagram of the first clamping part and the second clamping part in the pole piece sampling tension control device described in Embodiment 5;

[0043] Figure 9 It is a schematic structural diagram of the first clamping part and the second clamping part in the pole piece sampling tension control device described in Embodiment 6.

[0044] In the figure: 1. The first clamping part; 101. The first clamping arm; 102. The first connecting arm; 103. The magnet; 104. The positioning rib; 2. The second clamping part; 201. The second clamping arm; 202. The second connecting arm; 203. The avoidance structure; 204. The collection unit; 205. The positioning hole; 301. The driving rod; 3011. The limiting unit; 302. The handheld unit; 303. The operating unit; 3031. The operating section; 3032. The transmission section. Detailed implementation manners

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0047] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] The present invention provides a pole piece sampling tension control device as Figures 1 to 9 shown, including a first clamping part 1, a second clamping part 2, and a switching component. The first clamping part 1 includes two first clamping arms 101 arranged at intervals, and one end of the two first clamping arms 101 is hinged to the second clamping part 2;

[0049] The first clamping part 1 and the second clamping part 2 have a first state of clamping the pole piece and a second state of releasing the pole piece, and in the first state, the first clamping part 1 and the second clamping part 2 apply a constant clamping force to the pole piece; the switching component is transmission-connected to the first clamping part 1 and / or the second clamping part 2, and is used to control the first clamping part 1 and the second clamping part 2 to switch from the first state to the second state to release the clamping.

[0050] In the above scheme, the first clamping arm 101 can be directly hinged to the second clamping part 2, or can be hinged to the second clamping part 2 through an additionally extended hinged arm; in the first state, the first clamping arm 101 and the second clamping part 2 respectively clamp the pole piece from both sides of the pole piece, and fix the tension of the part of the pole piece located between the two first clamping arms 101. Since the clamping force is constant, on the one hand, the pole piece will not be damaged due to excessive clamping force, or the tension cannot be completely fixed due to excessive clamping force. On the other hand, there is no need for technicians to continuously operate to maintain the clamping state, thereby improving the clamping stability. Furthermore, when sampling the pole piece, it can effectively avoid changes in surface density caused by changes in tension at the sampling cutting position, so that the sampling test results can accurately reflect the true state of the pole piece.

[0051] Technicians only need to clamp the tension control device on the pole piece before starting sampling, and release the pole piece by switching the assembly after sampling. No additional operation is required during the sampling process, allowing them to focus more on the sampling operation.

[0052] Maintaining the constant clamping force between the first clamping part 1 and the second clamping part 2 in the first state can be achieved in a variety of ways. For example, the first clamping part 1 and the second clamping part 2 can be set to ferromagnetic materials, and a magnet 103 can be set in one of them or in both of them. A constant clamping force is generated by the attraction of the magnet 103 to the ferromagnetic material or by the attraction between the magnets 103. Alternatively, a spring can be used. Since the first clamping part 1 and the second clamping part 2 are relatively fixed in the first state, the extension / contraction degree of the spring is also maintained constant at this time, and the elastic force of the spring can also provide a constant clamping force.

[0053] In order to ensure that the overall tension of the electrode will not be affected by the missing parts left after sampling, the width of the sampling area in the direction of electrode movement should be greater than the width of the sample in the direction of electrode movement, that is, the distance between the two first clamping arms 101 should be greater than the width of the sample, so that the technicians can compensate for the tension of the missing parts of the sampling by sticking tape or other methods after the sampling is completed.

[0054] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0055] Embodiment 1

[0056] As an embodiment of the present utility model, this embodiment provides a tension control device for pole piece sampling. One end of the first clamping portion 1 and the second clamping portion 2 is hinged and rotatably arranged relative to each other with the hinge end as the axis. The switching between the first state and the second state is realized by the relative rotation of the first clamping portion 1 and the second clamping portion 2.

[0057] In this embodiment, as Figure 1 shown, the first clamping portion 1 includes two first clamping arms 101 made of rigid materials and arranged at intervals. The second clamping portion 2 is a rigid flat plate. One end of each of the two first clamping arms 101 is hinged to the second clamping portion 2. In the first state, the two first clamping arms 101 cooperate with the second clamping portion 2 to clamp different positions of the pole piece, so that the tension of the pole piece between the two first clamping arms 101 is fixed, avoiding the sample wrinkles and curling caused by the change of surface density at the cut during the sampling process, and enabling the sampling test results to more accurately reflect the actual state of the pole piece.

[0058] Furthermore, as Figure 2 and Figure 3 shown, the second clamping portion 2 has a through hole. The switching component includes a driving rod 301 passing through the second clamping surface through the through hole. The through hole is located within the projection of the first clamping arm 101 on the second clamping portion 2 in the first state; the driving rod 301 has a first position flush with or recessed from the second clamping surface, and a second position partially protruding from the second clamping surface. During actual use, the technician pushes the driving rod 301, and the push rod gradually moves from the first position to the second position to lift the first clamping arm 101. Correspondingly, the tension control device is switched from the first state to the second state.

[0059] In order to prevent the driving rod 301 from disengaging from the through hole, the driving rod 301 is also provided with a limiting unit 3011 protruding radially. In this embodiment, there are two limiting units 3011 arranged at intervals in the length direction of the driving rod 301. One is located in the middle of the driving rod 301, and the other is located at the end of the driving rod 301 where it abuts against the first clamping arm 101. At this time, in order to prevent the limiting unit 3011 at the end from affecting the clamping of the pole piece, a corresponding avoidance structure 203 is provided at one end of the through hole close to the second clamping surface, so that when the driving rod 301 is in the first position, the limiting unit 3011 is completely accommodated in the avoidance structure 203.

[0060] In this embodiment, since the two first clamping arms 101 are respectively hinged to the second clamping part 2, a driving rod 301 is provided corresponding to each first clamping arm 101. Specifically, two through holes are provided on the second clamping part 2, and the two through holes are respectively located within the projections of the two first clamping arms 101 on the second clamping part 2 in the first state. The two driving rods 301 respectively pass through the two through holes. In this way, technicians can selectively drive one driving rod 301 or drive the two driving rods 301 simultaneously according to actual operation needs.

[0061] In order to ensure that the first clamping part 1 and the second clamping part 2 apply a constant clamping force to the pole piece in the first state, a magnet 103 is provided at the other end of the first clamping arm 101 away from the hinged end. Correspondingly, the second clamping part 2 is made of ferromagnetic material.

[0062] The two first clamping arms 101 are parallel to each other. The extending direction of the first clamping arms 101 can also be selected according to actual needs. For example, the distance between the two first clamping arms 101 can gradually increase or gradually decrease along the direction away from the first connecting arm 102. Alternatively, the first clamping arms 101 can be set as straight arms or bent arms according to actual needs. The form of the bent arm can be set as an arc-shaped arm, a corrugated arm, etc. In this embodiment, the two first clamping arms 101 are parallel to each other and are both set as straight arms.

[0063] Embodiment Two

[0064] As another embodiment of the present utility model, the following further improvements are made on the basis of Embodiment One in this embodiment.

[0065] In this embodiment, as Figure 4 shown, the switching assembly further includes a handheld unit 302 and an operating unit 303. The handheld unit 302 is connected to the other end of the second clamping part 2 away from the hinged end and extends outward from the connection point in the direction away from the second clamping part 2. There is a hinge shaft in the middle of the handheld unit 302, and a hinge hole is correspondingly provided in the middle of the operating unit 303. The two are hinged through the hinge shaft and the hinge hole; the operating unit 303 is divided into an operating section 3031 and a transmission section 3032 with the hinge hole as the boundary. Among them, the transmission section 3032 is hinged to the driving rod 301 from the side of the second clamping part 2 away from the first clamping part 1. On the one hand, technicians can more conveniently grasp and keep the tension control device stable through the handheld unit 302. On the other hand, while holding the tension control device through the handheld unit 302, technicians can control the driving rod 301 with only one hand.

[0066] Specifically, the operating section 3031 and the transmission section 3032 can be on the same straight line. Or, for the purpose of avoiding other structures or for more labor-saving and convenient operation, a certain angle can be provided between the operating section 3031 and the transmission section 3032. The operating section 3031 is set to gradually approach the bent arm of the handheld unit 302 along the direction away from the hinge hole, or is set as a straight arm. However, it should be noted that, based on the knowledge of the technical principle of the present utility model, the conventional improvements made by those skilled in the art to the positional relationship between the operating section 3031 and the transmission section 3032 and their shapes also fall within the protection scope of the present utility model.

[0067] Furthermore, an operating unit 303 can be connected to only one driving rod 301, or can be connected to multiple driving rods 301 simultaneously. Specifically, in this embodiment, the first positions and the second positions of the multiple driving rods 301 are exactly the same. At the first position, the ends away from the first clamping portion 1 are flush. An operating unit 303 is respectively connected to the multiple driving rods 301 to drive the multiple driving rods 301 to move synchronously. In this solution, one first clamping arm 101 can be lifted by the multiple driving rods 301 simultaneously, improving the stability; or multiple clamping arms can be lifted by the multiple driving rods 301 simultaneously, further simplifying the operation.

[0068] Even further, an anti-slip unit is also provided on the outer side of the handheld unit 302. The anti-slip unit is made of elastic rubber and has stripes and protrusions on the surface to increase the friction with the palm.

[0069] The operating section 3031 can be set as a bent arm that gradually approaches the handheld unit 302 along the direction away from the hinge hole. However, it should be noted that, based on the knowledge of the technical principle of the present utility model, for example, as Figure 7 shown, the operating section 3031 is set as multiple units at different angles with the handheld unit 302 connected in sequence, or is integrally set as a bent arm, or the obtained solutions also fall within the protection scope of the present utility model.

[0070] Embodiment III

[0071] As another embodiment of the present utility model, this embodiment is basically the same as Embodiment I, except that the structure of the first clamping portion 1 is different.

[0072] In this embodiment, as Figure 5As shown in the figure, the first clamping part 1 is generally U-shaped, including two first clamping arms 101 made of rigid materials and arranged at intervals, and a first connecting arm 102 connecting the two clamping arms. The relative positions between the two first clamping arms 101 are kept fixed by the first connecting arm 102. The two first clamping arms 101 are rotatably connected to the second clamping part 2 through the first connecting arm 102, so that the clamping surfaces of the first clamping part 1 and the second clamping part 2 are perpendicular to the same plane. In the first state, the two first clamping arms 101 respectively cooperate with different parts of the second clamping part 2 to clamp the pole piece, and a sampling area is formed between the two first clamping arms 101.

[0073] Compared with the second embodiment, in this embodiment, the two first clamping arms 101 are connected by the first connecting arm 102 to realize the relative fixation of their positions. When clamping the pole piece, it is not necessary to adjust the two first clamping arms 101 separately, which simplifies the operation and improves the convenience of use. Only one driving rod 301 can lift the two first clamping arms 101, which simplifies the structure of the tension control device.

[0074] In addition, in this embodiment, the second clamping part 2 is provided with a handheld unit 302 as described in the second embodiment, which is convenient for stably grasping the tension control device.

[0075] Embodiment 4

[0076] As another embodiment of the present invention, this embodiment provides a pole piece sampling tension control device, which is different from the third embodiment in that the structures of the first clamping part 1 and the locking unit are different.

[0077] In this embodiment, as Figure 6 shown, the first clamping part 1 is generally rectangular with a hollow middle part, including two first clamping arms 101 arranged at intervals, and two first connecting arms 102 connecting the two first clamping arms 101 from both ends. The first clamping part 1 is hinged to the second clamping part 2 through one of the first connecting arms 102. Compared with the cantilever-type first clamping arms 101 in the third embodiment, in this embodiment, the first connecting arms 102 are connected to the two first clamping arms 101 from both ends of the first clamping arms 101, which can avoid the deformation of the first clamping arms 101 caused by long-term use to a certain extent and improve the stability of the tension control device.

[0078] Furthermore, on the side of the two first clamping arms 101 and the two first connecting arms 102 close to the second clamping part 2, they are all located on the clamping surface. That is, in the first state, the through hole on the second clamping part 2 is covered by the first connecting arm 102 far from the hinge end in the first clamping part 1. On the one hand, the magnitude of the force required to lift the first clamping part 1 is reduced. On the other hand, since the side of the first connecting arm 102 close to the second clamping part 2 is located on the clamping surface, the stroke required for the driving rod 301 to lift the first clamping part 1 is further reduced.

[0079] Furthermore, in this embodiment, one end of the driving rod 301 close to the first clamping part 1 is connected to the first clamping part 1. The locking unit is arranged as a spring sleeved on the outer side of the driving rod 301. One end of the spring abuts against the side of the second clamping part 2 far from the first clamping part 1, and the other end abuts against the limiting unit 3011 in the middle of the driving rod 301. And the spring is always in a stretched state. In the first state, through the resilience of the spring, the driving rod 301 pulls the first clamping part 1 with a constant acting force, and a stable clamping force is formed between the first clamping part 1 and the second clamping part 2. The tension control device in the first state is as Figure 6 shown; in the second state, the technician overcomes the resilience of the spring through the driving rod 301, and the first clamping part 1 moves away from the second clamping part 2 under the push of the driving rod 301 to release the clamping.

[0080] Further considering that the connection between the driving rod 301 and the first clamping part 1 makes it difficult for the pole piece to enter between the first clamping part 1 and the second clamping part 2, on the basis of this embodiment, an annular hanging hole can be provided at the end of the driving rod 301, and a hook can be provided at the position of the first clamping part 1 opposite to the driving rod 301, and the detachable connection between the two is realized through the hook and the hanging hole; when clamping the pole piece, the hook and the hanging hole are separated. After the pole piece reaches between the first clamping part 1 and the second clamping part 2, the hook is hung on the hanging hole, and the first clamping part 1 approaches the second clamping part 2 under the action of the spring resilience and finally clamps the pole piece.

[0081] In this embodiment, the sampling area is rectangular only for the convenience of technicians to understand this solution, and it is not a limitation to the technical solution itself. The shape of the sampling area can be adaptively adjusted according to the needs of the sampling shape, that is, the included angles between the two first clamping arms 101, between the two first connecting arms 102, and between the first clamping arm 101 and the first connecting arm 102 can all be adaptively adjusted according to the sampling shape, and the shapes of the first clamping arm 101 and the first connecting arm 102 can also be set to be the same or different according to the requirements.

[0082] Embodiment Five

[0083] As another embodiment of the present utility model, this embodiment makes improvements on the basis of Embodiment III. In this embodiment, the structure of the first clamping portion 1 is the same as that in Embodiment IV, and the setting of the locking device is different from that in Embodiment III.

[0084] In this embodiment, as Figure 8 shown, the structure of the second clamping portion 2 is exactly the same as that of the first clamping portion 1, including two second clamping arms 201 and two second connecting arms 202 connecting the two second clamping arms 201 from both ends. The size and shape of the sampling area surrounded by the second clamping arms 201 and the second connecting arms 202 are the same as those of the first clamping portion 1, and the sides of the second clamping arms 201 and the second connecting arms 202 close to the first clamping portion 1 are located on the second clamping surface; in the first state, the first clamping portion 1 and the second clamping portion 2 are respectively located on both sides of the pole piece to clamp the pole piece, and the sampling areas of the first clamping portion 1 and the second clamping portion 2 are aligned. The sample taken from the pole piece can directly fall off from the sampling area and be collected.

[0085] Specifically, the first clamping portion 1 and the second clamping portion 2 are respectively hinged with a first connecting arm 102 and a second connecting arm 202 as the hinge ends. The locking device is arranged on the first connecting arm 102 and the second connecting arm 202 away from the hinge ends in the first clamping portion 1 and the second clamping portion 2, and the positions of the magnets 103 arranged on the first clamping portion 1 and the second clamping portion 2 are opposite, and the polarities of the sides close to each other are opposite. In the first state, a stable clamping force is provided by the attraction between the magnets 103.

[0086] Although the first clamping portion 1 and the second clamping portion 2 clamp the pole piece through the hinge end and the locking device, there is still a risk of misalignment between the first clamping portion 1 and the second clamping portion 2, which may cause damage to the pole piece. Therefore, positioning structures are correspondingly arranged on the first clamping portion 1 and the second clamping portion 2. The positioning structures are positioning ribs 104 and positioning holes 205 respectively arranged on the opposite sides of the first clamping portion 1 and the second clamping portion 2. The positioning ribs 104 are located on the first clamping surface and protrude in a direction away from the first clamping portion 1. The positioning holes 205 are correspondingly arranged on the second clamping portion 2 at positions matching the positioning ribs 104. In the first state, the positioning ribs 104 extend into the positioning holes 205 to prevent the first clamping portion 1 and the second clamping portion 2 from being misaligned.

[0087] In this embodiment, a total of four pairs of positioning ribs 104 and positioning holes 205 are provided between the first clamping portion 1 and the second clamping portion 2. Two pairs of positioning ribs 104 and positioning holes 205 are respectively arranged on the first connecting arm 102 and the second connecting arm 202 at both ends of the first clamping arm 101 and the second clamping arm 201. The positioning ribs 104 are set to protrude from the surface of the first connecting arm 102, and the positioning holes 205 are set as cylindrical holes with a diameter slightly larger than the maximum value of the frustum diameter. The depth of the positioning holes 205 is greater than the height of the frustum. While achieving the mutual positioning of the first clamping portion 1 and the second clamping portion 2, it can effectively prevent the positioning ribs 104 from failing to smoothly enter the positioning holes 205. In addition, the shapes of the positioning holes 205 and the positioning ribs 104 near the hinge end can be set to be the same as those of the positioning holes 205 and the positioning ribs 104 far from the hinge end, or can be set to different structures according to different positions respectively.

[0088] In this embodiment, the shapes of the positioning ribs 104 and the positioning holes 205 are intended to make a schematic illustration of the present invention, and do not represent a limitation on their shapes. The positioning ribs 104 can also be set as frustum-shaped, triangular prism-shaped, spherical, or other shapes with regular or irregular cross-sections. The shape of the positioning holes 205 can be set as a hole with a corresponding cross-section according to the shape of the positioning ribs 104, or can be directly set as a cylindrical hole or a rectangular hole that can accommodate the positioning ribs 104. Technical solutions obtained by those skilled in the art through routine adjustments to the number, setting positions, and forms of the positioning ribs 104 and the positioning holes 205 on the basis of knowing the technical principles of the present invention also fall within the protection scope of the present invention.

[0089] Embodiment Six

[0090] As another embodiment of the present invention, the difference between this embodiment and Embodiment Five lies in the different structure of the second clamping portion 2.

[0091] In this embodiment, as Figure 9 shown, a collection unit 204 is further provided in the sampling area surrounded by the second clamping arm 201 and the second connecting arm 202. The collection unit 204 is connected to the second clamping arm 201 and the second connecting arm 202, and is set as a groove recessed from the second clamping surface in the direction away from the first clamping portion 1. The cut sampling samples directly fall into the collection unit 204, realizing the collection of the cut samples and solving the problem that the sampling samples are small in volume and easy to be lost.

[0092] Embodiment Seven

[0093] As another embodiment of the present invention, the following further improvements are made on the basis of Embodiment One.

[0094] In this embodiment, an elastic layer capable of undergoing elastic deformation under the influence of a force is further provided on the surfaces of the two first clamping arms 101. The presence of the elastic layer prevents direct rigid contact between the first clamping arms 101 and the pole piece, which may cause damage to the pole piece. Moreover, the presence of the elastic layer can reduce the tension difference of the pole piece in the length direction of the first clamping arm 101, further improving the sampling quality.

[0095] Based on the above requirements, in this embodiment, the elastic layer is only provided on the side of the first clamping arm 101 in contact with the pole piece, reducing the manufacturing cost of the pole piece sampling tension control device. The elastic layer can entirely cover the side of the first clamping arm 101 in contact with the pole piece, or can be divided into multiple parts and be spaced apart and distributed at different positions on the side of the first clamping arm 101 in contact with the pole piece. For example, it can be set as a number of elastic blocks spaced apart along the length direction of the first clamping arm 101, or set as a number of elastic strips spaced apart along the width direction of the first clamping arm 101. The material forming the elastic layer can be selected from conventional materials such as rubber, elastic resin, memory materials, etc. that can achieve the above functions.

[0096] Those skilled in the art should understand that the technical solutions described in this embodiment can also be combined with Embodiment 2, Embodiment 3, Embodiment 4, Embodiment 5, and Embodiment 6 respectively to obtain other embodiments that support the protection scope of the present invention. Among them, when combined with Embodiment 5 and Embodiment 6, the setting position of the elastic layer can be adjusted accordingly. For example, it can be provided on both the clamping arm and the connecting arm at the same time. Based on a good understanding of the technical principle of the present invention, the solutions obtained after making routine adjustments and changes to the material, setting method, setting position, etc. of the elastic layer also fall within the protection scope of the present invention.

[0097] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the above-mentioned technical content by using the disclosed technical content to obtain equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the present invention.

Claims

1. A pole piece sampling tension control device, characterized in that, It comprises a first clamping part, a second clamping part and a switching assembly, wherein the first clamping part comprises two first clamping arms arranged at intervals, and one end of the two first clamping arms is hinged to the second clamping part; The first clamping part and the second clamping part have a first state of clamping the pole piece and a second state of releasing the pole piece, and in the first state, the first clamping part and the second clamping part apply a constant clamping force to the pole piece; the switching component is transmission-connected to the first clamping part and / or the second clamping part, and is used to control the first clamping part and the second clamping part to switch from the first state to the second state to release the clamping.

2. The pole piece sampling tension control device according to claim 1, characterized in that The first clamping portion and the second clamping portion have a first clamping surface and a second clamping surface that cooperate with each other to clamp the pole piece. The switching assembly includes a driving rod passing through the second clamping surface, which is movably arranged relative to the second clamping surface along the penetration direction, and has a first position flush with or recessed in the second clamping surface, and a second position at least partially protruding from the second clamping surface and driving the first clamping part and the second clamping part to separate.

3. The pole piece sampling tension control device according to claim 2, wherein The switching assembly further includes a handheld unit connected to the second clamping portion, and an operating unit hinged to the handheld unit; The operating unit is divided into an operating section away from the second clamping part and a transmission section close to the second clamping part from the hinge. The transmission section is hinged to the driving rod from the side of the second clamping part away from the first clamping part.

4. The pole piece sampling tension control device according to claim 1, characterized in that, It also includes a locking unit provided on the first clamping portion and / or the second clamping portion, and is used to generate a stable clamping force between the first clamping portion and the second clamping portion in a first state; The locking unit is a spring or a magnet.

5. The pole piece sampling tension control device according to any one of claims 1-4, characterized in that, The first clamping portion includes two first clamping arms and a first connecting arm connecting the two clamping arms from one end; One side of at least two first clamping arms close to the second clamping portion is located on the first clamping surface.

6. The pole piece sampling tension control device according to claim 5, characterized in that, The first clamping part includes two first clamping arms and two first connecting arms, and the two first connecting arms respectively connect the two first clamping arms from both ends to form a closed sampling area; One of the two first connecting arms is hinged to the second clamping portion, and the other is located on the moving path of the driving rod.

7. The pole piece sampling tension control device according to claim 6, characterized in that, The second clamping part includes two second clamping arms and two second connecting arms, and the two second connecting arms respectively connect the two second clamping arms from both ends to form a closed sampling area; One of the two second connecting arms is hinged to the first clamping portion, and the other has a through hole for the driving rod to pass through.

8. The pole piece sampling tension control device according to claim 7, characterized in that, A collecting unit is provided in the sampling area. The collecting unit is connected to the second clamping arm and the second connecting arm, and is recessed from the second clamping surface toward a direction away from the first clamping portion.

9. The pole piece sampling tension control device according to claim 5, characterized in that, The first clamping portion and the second clamping portion are respectively provided with positioning ribs and positioning holes arranged opposite to each other, and the positioning ribs at least partially protrude from the first clamping surface; In the first state, the positioning ribs and the positioning holes are in place.

10. The pole piece sampling tension control device according to claim 5, characterized in that, The invention also includes an elastic layer, which at least partially covers the first clamping surface and / or the second clamping surface.

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