An electrode plate concave forming mechanism

Abstract

The utility model discloses a kind of pole piece concave mechanism, by setting support frame body, movable press roller assembly, fixed counter-pressure assembly, and the synergic working of combining first adjusting assembly and second adjusting assembly, the accurate adjustment of the spacing between convex point roller and counter-pressure roller is realized.The problem that the depth of indentation is fixed and not adjustable in prior art is effectively solved by double adjusting mechanism design, the concave depth can be flexibly adjusted according to the pole piece requirement of different thickness and material, the risk of pole piece coating damage is avoided;Meanwhile, the mechanism design does not need to add additional conductive agent or carry out surface coating, by forming controllable three-dimensional concave point structure on the surface of pole piece, the specific surface area of pole piece is effectively increased and the conductivity is improved, so as to significantly reduce battery manufacturing cost, simplify process flow, and give consideration to the improvement of battery performance and the improvement of production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, and in particular to an electrode concave forming mechanism. Background Technology

[0002] Currently, enhancing the conductivity of lithium-ion battery electrodes mainly involves adding conductive agents or surface coating processes. While these methods effectively improve conductivity, they suffer from high material costs and complex processes. Furthermore, traditional electrode rolling equipment can only achieve planar pressing, failing to create specific three-dimensional structures on the electrode surface, thus limiting further improvements in battery performance. Although embossing technology using patterned rollers has emerged in the market, the indentation depth is fixed and non-adjustable, making it difficult to optimize and adjust according to different material properties and process requirements. Moreover, complex pattern designs can easily damage the electrode coating, affecting battery safety and cycle life.

[0003] Current technologies face numerous challenges in lithium-ion battery electrode manufacturing: on the one hand, conductivity enhancement processes such as conductive agent addition and surface coating are costly, increasing battery manufacturing costs; on the other hand, traditional rolling equipment cannot form controllable three-dimensional structures, limiting the improvement of battery specific capacity; furthermore, the indentation depth of existing embossing technologies is inconvenient to adjust, making it difficult to adapt to the needs of electrodes of different thicknesses and materials, resulting in unsatisfactory pressing effects. Therefore, there is an urgent need to develop a concave forming device that can precisely control the indentation depth and flexibly adjust according to different electrode characteristics, so as to achieve enhanced electrode conductivity and increased specific surface area at low cost, thereby improving the overall performance and production efficiency of lithium-ion batteries. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides an electrode indentation mechanism that can precisely control the indentation depth and improve the conductivity of the electrode.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An electrode forming mechanism includes a support frame, a pressure roller assembly movably mounted on the support frame, and a counter-pressing assembly fixedly mounted on the support frame; a first adjustment assembly includes a first driving member, which is drivenly connected to one end of the pressure roller assembly for driving the pressure roller assembly to move relative to the counter-pressing assembly; a second adjustment assembly includes a first transmission module disposed at the other end of the pressure roller assembly, a second transmission module disposed opposite to and cooperating with the first transmission module, and a second driving member, which is connected to the second transmission module and adjusts the position of the pressure roller assembly by the relative movement of the first transmission module and the second transmission module.

[0007] Furthermore, the pressure roller assembly includes a convex roller and a first roller seat, the convex roller being rotatably mounted on the first roller seat, and the first roller seat being slidably connected to the support frame; the counter-pressure assembly includes a counter-pressure roller and a second roller seat, the counter-pressure roller being rotatably mounted on the second roller seat, and the second roller seat being fixedly disposed on the support frame; the first driving member is connected to the end of the first roller seat away from the second roller seat; the second driving member adjusts the position of the pressure roller assembly relative to the counter-pressure assembly by driving the second transmission module to move relative to the first transmission module.

[0008] Furthermore, a slide table is provided on the first roller seat, and a slide rail is provided on the support frame corresponding to the slide table. The slide table and the slide rail are slidably engaged, so that the first roller seat can move relative to the support frame along the slide rail.

[0009] Furthermore, the surface of the bump roller is provided with bumps arranged in an array.

[0010] Furthermore, the first driving component includes a fixed plate and a cylinder. The fixed plate is fixedly connected to the support frame, and the cylinder is fixedly mounted on the fixed plate. The piston rod of the cylinder is connected to the first roller seat and is used to drive the first roller seat to move.

[0011] Furthermore, the first transmission module is a first wedge, and the second transmission module is a second wedge; the first wedge is disposed on the pressure roller assembly, and the second wedge is in contact with the inclined surface of the first wedge. By moving the second wedge along the inclined surface of the first wedge, the pressure roller assembly is driven to adjust its position.

[0012] Furthermore, the second driving component includes a lead screw and a slider threadedly engaged with the lead screw. The second wedge is disposed on the slider, and a guide rail is provided on the side of the slider away from the second wedge. By rotating the lead screw, the slider is driven to move along the guide rail, thereby causing the second wedge to slide along the inclined surface of the first wedge, thus adjusting the position of the pressure roller assembly.

[0013] Furthermore, the second driving component also includes a handwheel, which is connected to the lead screw. Rotating the handwheel drives the lead screw to rotate, thereby controlling the displacement of the second wedge.

[0014] Furthermore, the second driving component also includes a speed reducer, which is disposed between the handwheel and the lead screw. The handwheel is connected to the speed reducer, and the speed reducer is driven by the lead screw. Rotating the handwheel drives the speed reducer to work, thereby driving the lead screw to rotate.

[0015] Furthermore, a dial indicator is provided on the pressure roller assembly to measure and display the positional change of the pressure roller assembly relative to the counterweight assembly.

[0016] The beneficial effects of this utility model are:

[0017] This invention's electrode indentation mechanism, through the configuration of a support frame, a movable pressure roller assembly, and a fixed counter-pressure assembly, combined with the coordinated operation of a first adjustment assembly and a second adjustment assembly, achieves precise adjustment of the distance between the protrusion roller and the counter-pressure roller. The first adjustment assembly is driven to one end of the pressure roller assembly, enabling movement of the pressure roller assembly relative to the counter-pressure assembly. The second adjustment assembly, via a first transmission module located at the other end of the pressure roller assembly and a cooperating second transmission module, utilizes the relative movement of the two transmission modules to precisely adjust the position of the pressure roller assembly. This dual-adjustment mechanism design effectively solves the problem of fixed and unadjustable indentation depth in existing technologies, allowing flexible adjustment of the indentation depth according to the needs of electrode sheets of different thicknesses and materials, avoiding the risk of electrode coating damage. Furthermore, this mechanism design eliminates the need for additional conductive agents or surface coatings. By forming a controllable three-dimensional concave structure on the electrode surface, it effectively increases the specific surface area of ​​the electrode and improves conductivity, thereby significantly reducing battery manufacturing costs, simplifying the process, and balancing improved battery performance with increased production efficiency. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a partial structural schematic diagram of the first adjusting component and the pressure roller component of this utility model;

[0021] Figure 3 This is a partial structural schematic diagram of the second adjustment component of this utility model;

[0022] Figure 4 This is a schematic diagram of the protrusion distribution of the protrusion roller of this utility model.

[0023] in,

[0024] 100. Support frame; 110. Slide rail;

[0025] 200, Pressure roller assembly; 210, Dotted roller; 211, Dot; 220, First roller seat; 230, Slide table;

[0026] 300, Counterweight assembly; 310, Counterweight roller; 320, Second roller holder;

[0027] 400. First adjustment component; 410. First driving component; 411. Fixing plate; 412. Cylinder;

[0028] 500. Second adjustment component; 510. First transmission module; 520. Second transmission module; 530. Second drive component; 531. Lead screw; 532. Slider; 533. Handwheel; 534. Reducer;

[0029] 600, dial indicator. Detailed Implementation

[0030] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0031] Reference Figure 1 An electrode concave forming mechanism includes a support frame 100, a pressure roller assembly 200 movably disposed on the support frame 100, and a counter-pressure assembly 300 fixedly disposed on the support frame 100.

[0032] Among them, continue to refer to Figure 2 , 3 The first adjusting component 400 is driven to one end of the pressure roller assembly 200 and is used to drive the pressure roller assembly 200 to move relative to the counter-pressure component 300; the second adjusting component 500 includes a first transmission module 510 disposed at the other end of the pressure roller assembly 200 and a second transmission module 520 disposed opposite to and cooperating with the first transmission module 510, and adjusts the position of the pressure roller assembly 200 by the relative movement of the first transmission module 510 and the second transmission module 520.

[0033] It is understood that the pressure roller assembly 200 is movably mounted on the support frame 100, while the counter-pressing assembly 300 is fixedly mounted on the support frame 100. To achieve precise adjustment of the position of the pressure roller assembly 200, this invention designs a double-end adjustment structure: one end is driven by a first adjustment assembly 400 connected to the pressure roller assembly 200, which can drive the entire pressure roller assembly 200 to move relative to the counter-pressing assembly 300; the other end is provided with a second adjustment assembly 500, including a first transmission module 510 mounted on the pressure roller assembly 200 and a second transmission module 520 mounted opposite and cooperating with it. The position of the pressure roller assembly 200 is adjusted by the relative movement of the first transmission module 510 and the second transmission module 520. This double-end adjustment design allows the electrode forming mechanism to achieve a combination of coarse and fine adjustment of the position of the pressure roller assembly 200, ensuring uniform pressure distribution during electrode pressing and improving the accuracy and consistency of electrode forming. For example, during the process of creating a concave shape on a battery electrode, the operator can first adjust the approximate distance between the pressure roller assembly 200 and the counter-pressure assembly 300 using the first adjustment assembly 400, and then, with the cooperation of the transmission module of the second adjustment assembly 500, achieve precise fine-tuning of the position of the pressure roller assembly 200, thereby ensuring that the shape and depth of the concave points on the manufactured battery electrode meet the design requirements.

[0034] In some embodiments, refer to Figure 2 , 3 The pressure roller assembly 200 includes a raised roller 210 and a first roller seat 220. The raised roller 210 is rotatably mounted on the first roller seat 220, and the first roller seat 220 is slidably connected to the support frame 100. The counter-pressure assembly 300 includes a counter-pressure roller 310 and a second roller seat 320. The counter-pressure roller 310 is rotatably mounted on the second roller seat 320, and the second roller seat 320 is fixedly mounted on the support frame 100. The first adjustment assembly 400 includes a first drive member 410, which is connected to the end of the first roller seat 220 away from the second roller seat 320. The second adjustment assembly 500 includes a second drive member 530, which is connected to the second transmission module 520. By driving the second transmission module 520 to move relative to the first transmission module 510, the position of the pressure roller assembly 200 relative to the counter-pressure assembly 300 is adjusted. (Refer to...) Figure 4 Furthermore, the surface of the convex roller 210 is provided with convex dots 211 arranged in an array.

[0035] In use, the operator can first activate the first drive unit 410 to move the convex roller 210 to the appropriate position, and then control the displacement of the second transmission module 520 relative to the first transmission module 510 through the second drive unit 530 to further precisely adjust the relative position between the convex roller 210 and the pressure roller 310. This ensures that the battery electrode is subjected to uniform and appropriate pressure when passing between the convex roller 210 and the pressure roller 310, forming a regular and consistent array of concave dots, thereby improving the quality and performance of the battery electrode.

[0036] In some embodiments, refer to Figure 1 , 2 The pressure roller assembly 200 is equipped with a dial indicator 600 for measuring and displaying the positional change of the pressure roller assembly 200 relative to the counterweight assembly 300. When the operator adjusts the position of the pressure roller assembly 200 using the first adjustment assembly 400 and the second adjustment assembly 500, the dial indicator 600 will immediately reflect the positional change, allowing the operator to clearly understand the actual effect of the adjustment.

[0037] In some embodiments, refer to Figure 2 The first roller seat 220 is provided with a slide table 230, and the support frame 100 is provided with a slide rail 110 corresponding to the slide table 230. The slide table 230 and the slide rail 110 are slidably engaged, so that the first roller seat 220 can move relative to the support frame 100 along the slide rail 110. The first roller seat 220 can move stably and linearly relative to the support frame 100 along the slide rail 110.

[0038] In some embodiments, refer to Figure 2 The first driving component 410 includes a fixed plate 411 and a cylinder 412. The fixed plate 411 is fixedly connected to the support frame 100. The cylinder 412 is fixedly mounted on the fixed plate 411. The piston rod of the cylinder 412 is connected to the first roller seat 220 and is used to drive the first roller seat 220 to move. When it is necessary to adjust the distance between the convex roller 210 and the counterweight roller 310 to accommodate electrode materials of different thicknesses, the operator can control the air pressure and stroke of the cylinder 412 to make the piston rod push or pull the first roller seat 220 along the slide rail 110. The sliding cooperation between the slide 230 on the first roller seat 220 and the slide rail 110 on the support frame 100 ensures the smoothness and accuracy of this movement process, avoiding lateral deviation or shaking, thereby ensuring that the convex roller 210 can always remain parallel to the counterweight roller 310, ensuring that the electrode is subjected to uniform force during the concave formation process, and finally forming a concave array with consistent depth and regular distribution, thereby improving the overall quality and performance of the battery electrode.

[0039] In some embodiments, refer to Figure 2 ,3 The first transmission module 510 is a first wedge, and the second transmission module 520 is a second wedge. The first wedge is disposed on the pressure roller assembly 200, and the second wedge is in contact with the inclined surface of the first wedge. By moving the second wedge along the inclined surface of the first wedge, the pressure roller assembly 200 is adjusted in position. It can be understood that the second adjustment assembly 500 in this case adopts the wedge transmission principle. Utilizing the inclined surface transmission characteristics of the wedge, when the second wedge moves along the inclined surface of the first wedge, due to the geometric characteristics of the inclined surface, a component force perpendicular to the direction of movement is generated, thereby driving the pressure roller assembly 200 to perform precise position adjustment. Specifically, the slide table 230 slides in conjunction with the slide rail 110, allowing the first roller seat 220 to move relative to the support frame 100 along the slide rail 110. The vertical component force generated when the second wedge moves along the inclined surface of the first wedge is transmitted to the pressure roller assembly 200 through the cooperation of the slide table and the slide rail, driving the pressure roller assembly 200 to adjust its position along the slide rail direction.

[0040] Specifically, when fine-tuning the gap between the convex roller 210 and the counterweight roller 310 is required, the operator can control the second drive component 530 to move the second wedge slightly along the inclined surface of the first wedge. If the second wedge moves forward, it will raise the first wedge along with the entire counterweight roller assembly 200, increasing the gap with the counterweight assembly 300; conversely, if the second wedge moves backward, it will lower the counterweight roller assembly 200, decreasing the gap. The advantage of this wedge drive mechanism is that it can convert horizontal displacement into vertical displacement, and due to the inclination ratio, it can achieve greater adjustment precision. This allows the operator to precisely control the pressure during the denting process according to the thickness and material characteristics of the electrode sheet, thereby ensuring that the depth and shape of the dents formed on the battery electrode sheet meet the design requirements.

[0041] Furthermore, refer to Figure 3The second driving component 530 includes a lead screw 531 and a slider 532 threadedly engaged with the lead screw 531. A second wedge is disposed on the slider 532. A guide rail is provided on the side of the slider away from the second wedge. By rotating the lead screw 531, the slider 532 is driven to move along the guide rail, thereby causing the second wedge to slide along the inclined surface of the first wedge, adjusting the position of the pressure roller assembly 200. It can be understood that due to the threaded engagement between the lead screw 531 and the slider 532, the rotational motion of the lead screw 531 is converted into linear movement of the slider 532, thereby causing the second wedge disposed on the slider 532 to slide along the inclined surface of the first wedge. This transmission method utilizes the high-precision characteristics of the lead screw 531 transmission, accurately converting rotational motion into linear displacement. Simultaneously, by selecting the pitch, a deceleration and amplification effect of the displacement can be achieved. Combined with the lever amplification effect of the wedge's inclined surface, even if the lead screw 531 rotates only a small angle, it can produce sufficiently precise vertical adjustment of the pressure roller assembly 200 position.

[0042] Further, continue to refer to Figure 3 The second driving component 530 also includes a handwheel 533, which is connected to the lead screw 531. Rotating the handwheel 533 drives the lead screw 531 to rotate, thereby controlling the displacement of the second wedge. The operator can manually rotate the handwheel 533 to directly drive the lead screw 531 to rotate. Due to the threaded fit between the lead screw 531 and the slider 532, the rotation of the lead screw 531 is precisely converted into linear movement of the slider 532, thus controlling the displacement of the second wedge mounted on the slider 532 along the inclined surface of the first wedge. The handwheel 533 has an appropriate diameter and handle, allowing the operator to easily apply force and precisely control the rotation angle. When it is necessary to adjust the gap between the convex roller 210 and the pressure roller 310 according to the thickness and process requirements of different electrode types, the operator can observe the reading of the dial indicator 600 while slowly rotating the handwheel 533. Each rotation at a certain angle allows for precise control of the displacement of the second wedge, thereby adjusting the height position of the pressure roller assembly 200 through the action of the inclined surface of the wedge. Operators can fine-tune the position of handwheel 533 based on the real-time observation of the electrode concavity effect until the best pressing effect is achieved, ensuring that the concavities formed on the battery electrode have ideal depth and shape, thereby improving the battery capacity and cycle performance and meeting the production requirements of high-quality batteries.

[0043] Further, continue to refer to Figure 3The second driving component 530 further includes a reducer 534, which is disposed between the handwheel 533 and the lead screw 531. The handwheel 533 is connected to the reducer 534, and the reducer 534 is drive-connected to the lead screw 531. Rotating the handwheel 533 drives the reducer 534, which in turn drives the lead screw 531 to rotate. The reducer 534, positioned between the handwheel 533 and the lead screw 531, forms a transmission link of handwheel 533-reducer 534-lead screw 531. The handwheel 533 is directly connected to the input shaft of the reducer 534, while the output shaft of the reducer 534 maintains a drive-connected connection with the lead screw 531. Utilizing the reduction and amplification characteristics of the reducer 534, when the operator rotates the handwheel 533, the rotational motion of the handwheel 533 is first transmitted to the input shaft of the reducer 534. After reduction processing by the internal gear system of the reducer 534, the rotational speed output to the lead screw 531 is reduced, but the torque is correspondingly increased. For example, using a reducer 534 with a reduction ratio of 10:1, when the operator rotates the handwheel 533 one revolution, the lead screw 531 only rotates one-tenth of a revolution. This greatly improves the precision of adjustment, ensuring that even slight vibrations in the handwheel 533 will significantly reduce the displacement transmitted to the lead screw 531. In actual production, when technicians need to precisely adjust the gap between the convex roller 210 and the pressure roller 310 according to the characteristics of different electrode models, they can easily rotate the handwheel 533. Through the reduction effect of the reducer 534, precise control of the rotation of the lead screw 531 is achieved. Furthermore, through the transmission relationship between the slider 532 and the wedge, the position of the pressure roller 310 assembly 200 can be adjusted at the micrometer level.

[0044] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A electrode concave forming mechanism, comprising a support frame, a pressure roller assembly movably disposed on the support frame, and a counter-pressing assembly fixedly disposed on the support frame, characterized in that: A first adjusting component includes a first driving member, which is drivenly connected to one end of the pressure roller assembly and is used to drive the pressure roller assembly to move relative to the counter-pressure assembly. The second adjustment component includes a first transmission module disposed at the other end of the pressure roller assembly, a second transmission module disposed opposite to and cooperating with the first transmission module, and a second drive member. The second drive member is connected to the second transmission module, and the position of the pressure roller assembly is adjusted by the relative movement of the first transmission module and the second transmission module.

2. The electrode concave forming mechanism according to claim 1, characterized in that: The pressure roller assembly includes a bump roller and a first roller seat, the bump roller is rotatably mounted on the first roller seat, and the first roller seat is slidably connected to the support frame. The pressure assembly includes a pressure roller and a second roller seat. The pressure roller is rotatably mounted on the second roller seat, and the second roller seat is fixedly mounted on the support frame. The first drive member is connected to the end of the first roller seat that is away from the second roller seat; The second drive unit adjusts the position of the pressure roller assembly relative to the counter-pressure assembly by driving the second transmission module to move relative to the first transmission module.

3. The electrode concave forming mechanism according to claim 2, characterized in that, The first roller seat is provided with a slide table, and the support frame is provided with a slide rail corresponding to the slide table. The slide table and the slide rail are slidably engaged, so that the first roller seat can move relative to the support frame along the slide rail.

4. The electrode concave forming mechanism according to claim 2, characterized in that, The surface of the bump roller is provided with bumps arranged in an array.

5. The electrode concave forming mechanism according to claim 2, characterized in that, The first driving component includes a fixed plate and a cylinder. The fixed plate is fixedly connected to the support frame, and the cylinder is fixedly mounted on the fixed plate. The piston rod of the cylinder is connected to the first roller seat and is used to drive the first roller seat to move.

6. The electrode concave forming mechanism according to claim 1, characterized in that, The first transmission module is a first wedge, and the second transmission module is a second wedge; The first wedge is disposed on the pressure roller assembly, and the second wedge is in contact with the inclined surface of the first wedge. The second wedge moves along the inclined surface of the first wedge, thereby driving the pressure roller assembly to adjust its position.

7. The electrode concave forming mechanism according to claim 6, characterized in that, The second driving component includes a lead screw and a slider that is threadedly engaged with the lead screw. The second wedge is disposed on the slider. A guide rail is disposed on the side of the slider away from the second wedge. By rotating the lead screw, the slider is driven to move along the guide rail, thereby causing the second wedge to slide along the inclined surface of the first wedge, thus adjusting the position of the pressure roller assembly.

8. The electrode concave forming mechanism according to claim 7, characterized in that, The second driving component also includes a handwheel, which is connected to the lead screw. Rotating the handwheel drives the lead screw to rotate, thereby controlling the displacement of the second wedge.

9. The electrode concave forming mechanism according to claim 8, characterized in that, The second driving component also includes a speed reducer, which is disposed between the handwheel and the lead screw. The handwheel is connected to the speed reducer, and the speed reducer is driven by the lead screw. Rotating the handwheel drives the speed reducer to work, thereby driving the lead screw to rotate.

10. The electrode concave forming mechanism according to any one of claims 1-9, characterized in that, The pressure roller assembly is equipped with a dial indicator for measuring and displaying the positional change of the pressure roller assembly relative to the counterweight assembly.

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