A formation fixture for silicon-carbon anode batteries

Abstract

This utility model discloses a formation fixture for silicon-carbon anode batteries, comprising several clamping plates, each clamping plate having tooling components on its front and back sides; buffer structures are provided on the front and rear side walls of the tooling components; a first pressure plate and a second pressure plate are respectively provided on the front and rear sides of all clamping plates, a first side plate is provided on the outer side of the second pressure plate, and a second side plate is provided on the outer side of the first pressure plate; first guide rods are evenly arranged on the left and right sides of the first side plate, with the axial outer ends of the first guide rods connected to the first pressure plate located on the other side of the clamping plate; second guide rods are evenly arranged on the left and right sides of the second side plate, with the axial outer ends of the second guide rods connected to the second pressure plate located on the other side of the clamping plate; a first driving component is provided on the first side plate, and a second driving component is provided on the second side plate. This utility model helps to solve the problem that some current formation fixtures do not have tooling restraint structures adapted to the battery, resulting in unstable clamping effects and thus affecting the battery formation quality.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a formation fixture for a silicon-carbon anode battery. Background Technology

[0002] In recent years, my country's lithium-ion battery industry has developed rapidly, with its global market share continuously increasing. Driven by large-scale investment in the lithium-ion battery industry, the demand for lithium-ion battery anode materials is constantly rising. Silicon anodes have higher gravimetric and volumetric energy densities compared to graphite anodes. Silicon-carbon anode batteries typically require formation after production, which involves charging the battery to activate it.

[0003] Because lithium-ion batteries are prone to gas generation and volume expansion during the formation process, clamps are used to fix the batteries during formation. Existing formation clamps, such as the one disclosed in Chinese patent CN210142693U, include at least two clamping plates, a first pressure plate, and a second pressure plate stacked in sequence. The two adjacent clamping plates are used to clamp the battery. The first pressure plate and the second pressure plate are fixed relative to each other. The formation clamp also includes a force-applying component located on the side of the second pressure plate opposite to the first pressure plate. The force-applying component is configured to apply force to the second pressure plate in a direction perpendicular to the surface of the second pressure plate, so as to push the second pressure plate and the first pressure plate toward the clamping plate, thereby driving the clamping plate to clamp the battery.

[0004] However, in the above technical solution, the battery is clamped only by the clamping plates on the front and rear sides. Since the clamping plates are flat single-plate structures without corresponding battery tooling restraint structures, the battery cannot be effectively positioned when it is inserted into the gap between adjacent clamping plates. This can easily lead to misalignment of adjacent batteries or tilting of the battery posture. This will cause uneven local stress on the battery due to the squeezing force of the clamping plates. The expansion of the negative electrode of the battery during the formation process will become uncontrollable, thus affecting the performance of the battery. Summary of the Invention

[0005] This invention provides a formation fixture for silicon-carbon anode batteries, which helps to solve the problem that some current formation fixtures do not have a tooling restraint structure adapted to the battery, resulting in unstable clamping effect and thus affecting the formation quality of the battery.

[0006] This utility model is implemented as follows:

[0007] A formation fixture for a silicon-carbon anode battery includes several clamping plates arranged in a linear array. Each clamping plate has tooling components on both its front and back sides. The tooling components have positioning grooves that form a semi-enclosed restraint structure for the battery. When two adjacent clamping plates are clamped together, the tooling components on adjacent sides of the two clamping plates fit together, and the two positioning grooves on the two adjacent tooling components together form a double-sided enclosed restraint structure for the battery. The front and rear sidewalls of the tooling components have buffer structures. A first pressure plate and a second pressure plate are respectively located on the front and rear sides of all clamping plates. The first pressure plate and the second pressure plate... Each clamping plate is parallel to the other. A first side plate is provided on the outer side of the second pressure plate, and a second side plate is provided on the outer side of the first pressure plate. First guide rods are evenly arranged on the left and right sides of the first side plate. The outer axial end of the first guide rod is connected to the first pressure plate located on the other side of the clamping plate. Second guide rods are evenly arranged on the left and right sides of the second side plate. The outer axial end of the second guide rod is connected to the second pressure plate located on the other side of the clamping plate. A first driving member is provided on the first side plate, which can drive the second side plate to move relative to the clamping plate in the direction of clamping tension. A second driving member is provided on the second side plate, which can drive the first side plate to move relative to the clamping plate in the direction of clamping tension.

[0008] Based on the above technical solution, the top of the clamping plate is provided with a recessed slot structure, the side profile of the tooling part is an "n" shaped structure, the top of the tooling part is embedded in the slot, and the front and rear sides of the tooling part are attached to the front and back side walls of the clamping plate.

[0009] Based on the above technical solution, the tooling is provided with raised baffles on the left and right sides of the positioning groove, and the buffer structure is a buffer sheet located on the baffle, which is made of elastic material.

[0010] Based on the above technical solution, the first guide rod is connected and fixed to the first side plate and the first pressure plate at both axial ends, and the second guide rod is connected and fixed to the second side plate and the second pressure plate at both axial ends; the clamping plate and the second pressure plate are provided with first guide holes for the first guide rod to pass through on the left and right sides, and the clamping plate and the first pressure plate are provided with second guide holes for the second guide rod to pass through on the left and right sides.

[0011] Based on the above technical solution, the buffer sheet has a strip-shaped rectangular structure.

[0012] Based on the above technical solution, the main body of the first side plate is a plate structure parallel to the clamping plate, and an extension piece is provided around its perimeter. The connection point between the first guide rod and the first side plate is located on the extension piece.

[0013] Based on the above technical solution, the left and right side walls of the positioning groove are provided with a slanted open structure at the top corner.

[0014] Based on the above technical solution, the first driving component is detachably connected to the first side plate, and the second driving component is detachably connected to the second side plate.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] This invention achieves precise positioning and stable clamping of the battery by incorporating a tooling with positioning grooves on the clamping plate. Adjacent tooling pieces together form a double-sided wrapping and restraining structure. This structure effectively prevents misalignment or tilting of the battery within the clamp, ensuring uniform force distribution during the formation process. It reduces battery performance degradation caused by uneven localized force, thereby improving the formation quality and consistency of the battery.

[0017] The buffer structure on the front and rear side walls of the tooling in this invention can absorb the stress generated by the gas expansion of the battery during the formation process, reducing rigid collisions between the battery and the clamp and lowering the risk of battery damage. At the same time, the dual-side driven clamping design can provide appropriate clamping force according to the actual situation of the battery, and together with the buffer structure, it can prevent damage to the battery due to excessive clamping force, further improving the safety of the battery during the formation process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the formation fixture for a silicon-carbon anode battery.

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of a single clamping component;

[0021] Figure 3 for Figure 2 Schematic diagram of the middle plate;

[0022] Figure 4 for Figure 2 Side view of the tooling component;

[0023] Figure 5 for Figure 1 Schematic diagram of the connection structure between the first pressure plate and the first side plate;

[0024] Figure 6 This is a schematic diagram of the path direction for simultaneous pressure on both sides.

[0025] The diagram is labeled as follows: 1. Clamping plate; 11. Slot; 12. First guide hole; 13. Second guide hole; 2. Tooling; 21. Positioning slot; 22. Edge retainer; 23. Buffer plate; 3. Battery; 4. First pressure plate; 5. Second pressure plate; 6. First side plate; 61. Mounting hole; 62. Extension piece; 7. Second side plate; 81. First driving component; 82. Second driving component; 91. First guide rod; 92. Second guide rod. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0027] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] Combination Figures 1 to 6 This embodiment discloses a formation fixture for silicon-carbon anode batteries to address the problem that some current formation fixtures lack a tooling restraint structure adapted to the battery, leading to unstable clamping effects and affecting battery formation quality. By optimizing the fixture's structural design, precise positioning and stable clamping of the battery are achieved, ensuring uniform force on the battery during formation, thereby improving the battery's formation quality and performance stability.

[0031] In this embodiment, as Figure 1 As shown, the chemical formation fixture includes nine clamping plates 1 arranged in a linear array, combined with... Figure 2 and Figure 3 As shown, the top of the clamping plate 1 is provided with a recessed slot 11, the four outer corners of the clamping plate 1 are rounded, and the inner sides of the four outer corners are provided with a first guide hole 12 and a second guide hole 13 of different sizes. The first guide hole 12 is located on the periphery of the second guide block.

[0032] Tooling components 2 are provided on both sides of each clamping plate 1, in combination with... Figure 4 As shown, clamping plate 1 is a flat rectangular plate structure, and the side profile of tooling component 2 is an "n" shape. The top of tooling component 2 is fitted into the slot 11, and the front and rear sides of tooling component 2 are attached to the front and back side walls of clamping plate 1. One tooling component 2 is fitted and fixed on each clamping plate 1, forming a clamping assembly. This connection method allows tooling component 2 to be firmly fixed on clamping plate 1, while facilitating the installation and removal of tooling component 2. When it is necessary to replace tooling component 2 with different specifications to accommodate batteries of different sizes, the operator can easily remove tooling component 2 from clamping plate 1, improving production efficiency.

[0033] Specifically, the tooling 2 has positioning grooves 21 on both sides, with an opening at the top. The positioning grooves 21 form a semi-enclosed restraint structure of the battery 3. The inner contour of the positioning grooves 21 is adapted to the outer contour of the battery 3 so that the battery can be precisely tooled and avoid misalignment or tilting.

[0034] During operation, after the two adjacent clamping plates 1 clamp the battery, the tooling parts 2 located on adjacent sides of the two clamping plates 1 fit together. The two positioning grooves 21 on the two adjacent tooling parts 2 together form a double-sided wrapping restraint structure for the battery 3. This double-sided wrapping restraint structure can effectively position and fix the battery 3 from both sides, preventing the battery from being misaligned or tilted in the clamp, and ensuring that the battery maintains a stable posture during the formation process.

[0035] The tooling 2 has buffer structures on its front and rear side walls. During battery formation, the battery expands to a certain extent due to gas production and other reasons. The buffer structure can effectively absorb the stress generated by the battery expansion, preventing the battery from being damaged by excessive pressure. At the same time, the buffer structure can also play a certain buffering role, reducing rigid collisions between the battery and the clamp, and further improving the safety of the battery during the formation process. In this embodiment, the tooling 2 has raised baffles 22 on the left and right sides of the positioning groove 21. The buffer structure is a buffer sheet 23 located on the baffle 22. The buffer sheet 23 is a strip-shaped rectangular structure. The strip-shaped rectangular buffer sheet 23 can evenly distribute the stress generated by the expansion of the battery 3, ensuring that the buffer force on the battery 3 is consistent in all directions. The buffer sheet 23 is made of elastic material, such as rubber or sponge. The buffer sheet 23 can provide a buffering effect during the clamping of the battery 3, avoiding excessive compression of the battery 3. In addition, it can absorb the stress generated by the expansion of the battery due to gas production during the formation process, reducing rigid collisions between the battery and the clamp, and reducing the risk of battery damage.

[0036] Combined again Figure 1 As shown, a first pressure plate 4 and a second pressure plate 5 are respectively provided on the front and rear sides of all clamping plates 1. The first pressure plate 4 and the second pressure plate 5 are parallel to each clamping plate 1. A first side plate 6 is provided on the outer side of the second pressure plate 5, and a second side plate 7 is provided on the outer side of the first pressure plate 4. A first guide rod 91 is evenly arranged on the left and right sides of the first side plate 6. The outer axial end of the first guide rod 91 is connected to the first pressure plate 4 located on the other side of the clamping plate 1. A second guide rod 92 is evenly arranged on the left and right sides of the second side plate 7. The outer axial end of the second guide rod 92 is connected to the second pressure plate 5 located on the other side of the clamping plate 1. A first driving member 81 is provided on the first side plate 6, which can drive the second side plate 7 to move relative to the clamping plate 1 in the clamping tension direction. A second driving member 82 is provided on the second side plate 7, which can drive the first side plate 6 to move relative to the clamping plate 1 in the clamping tension direction.

[0037] Furthermore, in combination Figure 5 As shown, a half-tool 2 is provided on the inner wall of the first pressure plate 4. This half-tool 2 is glued and fixed to the inner wall of the first pressure plate 4, providing a positioning groove 21. This groove, in conjunction with the positioning groove 21 on the outer side of the clamping plate 1 adjacent to the first pressure plate 4, together wraps and restrains the same battery from both sides. Similarly, a half-tool 2 is also provided on the inner wall of the second pressure plate 5. Its specific structure and working principle will not be described in detail here.

[0038] The first guide rod 91 is connected and fixed to the first side plate 6 and the first pressure plate 4 at both axial ends (by bolts or end caps). The first guide rod 91 passes through the first guide hole 12 on each clamping plate 1. The second guide rod 92 is connected and fixed to the second side plate 7 and the second pressure plate 5 at both axial ends (by bolts or end caps). The second guide rod 92 passes through the second guide hole 13 on each clamping plate 1. The guide hole design ensures the straightness of the first guide rod 91 and the second guide rod 92 during movement, ensuring that the first side plate 6 and the second side plate 7 can move smoothly under the drive of the driving component, thereby achieving precise adjustment of the clamping force of the clamping plate 1. Both the first driving member 81 and the second driving member 82 are electric cylinders. The main body of the first driving member 81 is fixed to the first side plate 6 through the mounting hole 61. The telescopic rod of the first driving member 81 is horizontally inward and abuts against the outer wall of the second pressure plate 5. When the telescopic rod of the first driving member 81 extends, it pushes the second pressure plate 5 inward. At the same time, under the influence of relative motion, the first side plate 6 moves outward and away from the second pressure plate 5. During this process, the first side plate 6 drives the first pressure plate 4 on the other side to move via the first guide rod 91. That is to say, the operation of a single driving member can also achieve the double-sided clamping effect. The installation relationship between the second driving member 82 and the second side plate 7 is the same as the installation relationship between the first driving member 81 and the side plate of the first side plate 6.

[0039] Based on the above technical solution, the synergistic effect of the first driving component 81 and the second driving component 82 can reduce the workload of a single driving component and achieve precise control of the clamping force of the clamping plate 1. Of course, compared to clamping by single-sided extrusion, double-sided clamping avoids excessive force at the extrusion end due to weakened force at the distal end, which could cause wear or even damage to the battery structure on that side. After the battery 3 is placed in the clamp, the output forces of the first driving component 81 and the second driving component 82 are adjusted according to the battery specifications and formation process requirements, so that the clamping plate 1 applies a suitable clamping force to the battery 3. This adjustable clamping force design can adapt to different specifications and types of silicon-carbon anode batteries, improving the versatility and flexibility of the clamp.

[0040] Furthermore, the main body of the first side plate 6 is a plate structure parallel to the clamping plate 1, with extension pieces 62 provided around its perimeter. The connection point between the first guide rod 91 and the first side plate 6 is located on the extension pieces 62. The extension pieces 62 increase the connection area between the first guide rod 91 and the first side plate 6, improving the stability of the connection. Simultaneously, this structural design allows the first side plate 6 to distribute stress more evenly when under load, reducing deformation or damage caused by stress concentration. It should be noted that the structure of the second side plate 7 is consistent with the structure of the first side plate 6.

[0041] To facilitate the insertion and removal of the battery 3 from the top of the positioning slot 21, the left and right side walls of the positioning slot 21 are provided with beveled openings at the top corners. When the battery 3 is placed into the fixture, the beveled openings act as guides, making it easier and more accurate for the battery 3 to enter the positioning slot 21. After the battery 3 has been formed, it is also convenient for operators to remove the battery 3 from the fixture, thus improving production efficiency.

[0042] It should be noted that the first drive component 81 is detachably connected to the first side plate 6, and the second drive component 82 is detachably connected to the second side plate 7. This detachable connection method facilitates the installation, maintenance, and replacement of the drive components. When a drive component malfunctions or needs to be upgraded, the operator can easily remove the drive component from the side plate for repair or replacement, reducing equipment maintenance costs and downtime.

[0043] The formation fixture in this embodiment adopts a modular design, with tooling 2 detachably connected to clamping plate 1, and the drive component detachably connected to the side plate. This design allows for easy replacement of tooling 2 and drive components of different specifications to adapt to silicon-carbon anode batteries of different sizes and types. Simultaneously, the adjustable clamping force design enables the fixture to meet the requirements of different formation processes, improving its versatility and flexibility, and reducing production costs for enterprises. It effectively solves the problems of unstable clamping effect and impact on battery formation quality found in existing formation fixtures. This fixture offers numerous beneficial effects, including improved battery clamping stability, enhanced battery safety, increased fixture versatility and flexibility, and improved production efficiency, and has broad application prospects in the lithium-ion battery production field. With the continuous development of the lithium-ion battery industry, the requirements for battery formation quality are becoming increasingly stringent. This new formation fixture will provide strong technical support for the production of silicon-carbon anode batteries, promoting the advancement of battery technology and the development of the industry.

[0044] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A formation fixture for a silicon-carbon anode battery, characterized in that, The clamping plate (1) is arranged in a linear array. Each clamping plate (1) has a tooling part (2) on its front and back sides. The tooling part (2) has a positioning groove (21). The positioning groove (21) constitutes a semi-enclosed restraint structure of the battery. After being clamped by two adjacent clamping plates (1), the tooling parts (2) located on adjacent sides of the two clamping plates (1) fit together, and the two positioning grooves (21) on the two adjacent tooling parts (2) together form a double-sided wrapping restraint structure of the battery. The tooling (2) has a buffer structure on its front and rear side walls; A first pressure plate (4) and a second pressure plate (5) are respectively provided on the front and rear sides of all clamping plates (1). The first pressure plate (4) and the second pressure plate (5) are parallel to each clamping plate (1). A first side plate (6) is provided on the outside of the second pressure plate (5), and a second side plate (7) is provided on the outside of the first pressure plate (4). A first guide rod (91) is evenly arranged on the left and right sides of the first side plate (6). The outer end of the first guide rod (91) is connected to the first pressure plate (4) located on the other side of the clamping plate (1). A second guide rod (92) is evenly arranged on the left and right sides of the second side plate (7). The outer end of the second guide rod (92) is connected to the second pressure plate (5) located on the other side of the clamping plate (1). A first driving member (81) is provided on the first side plate (6) that can drive the second side plate (7) to move relative to the clamping plate (1) in the clamping and loosening direction. A second driving member (82) is provided on the second side plate (7) that can drive the first side plate (6) to move relative to the clamping plate (1) in the clamping and loosening direction.

2. The formation fixture for a silicon-carbon anode battery according to claim 1, characterized in that, The clamping plate (1) has a recessed slot (11) at the top. The side profile of the tooling part (2) is an "n" shaped structure. The top of the tooling part (2) is embedded in the slot (11). The front and rear sides of the tooling part (2) are attached to the front and back side walls of the clamping plate (1).

3. The formation fixture for a silicon-carbon anode battery according to claim 1, characterized in that, The tooling (2) has raised baffles (22) on the left and right sides of the positioning groove (21), and the buffer structure is a buffer sheet (23) on the baffle (22), which is made of elastic material.

4. The formation fixture for a silicon-carbon anode battery according to claim 1, characterized in that, The first guide rod (91) is connected and fixed to the first side plate (6) and the first pressure plate (4) at both ends of its axial direction, and the second guide rod (92) is connected and fixed to the second side plate (7) and the second pressure plate (5) at both ends of its axial direction, respectively; the clamping plate (1) and the second pressure plate (5) are provided with a first guide hole (12) for the first guide rod (91) to pass through, and the clamping plate (1) and the first pressure plate (4) are provided with a second guide hole (13) for the second guide rod (92) to pass through.

5. The formation fixture for a silicon-carbon anode battery according to claim 3, characterized in that, The buffer sheet (23) has a strip-shaped rectangular structure.

6. The formation fixture for a silicon-carbon anode battery according to claim 4, characterized in that, The main body of the first side plate (6) is a plate structure parallel to the clamp (1), and an extension piece (62) is provided around it. The connection point between the first guide rod (91) and the first side plate (6) is located on the extension piece (62).

7. The formation fixture for a silicon-carbon anode battery according to claim 1, characterized in that, The positioning groove (21) has a slanted open structure on the left and right side walls at the top corner.

8. The formation fixture for a silicon-carbon anode battery according to claim 1, characterized in that, The first drive unit (81) is detachably connected to the first side plate (6), and the second drive unit (82) is detachably connected to the second side plate (7).

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