A formation clamp and formation machine

Abstract

The application discloses a formation clamp and a formation machine. The formation clamp comprises a base, a push plate assembly, a support plate, a clamp plate assembly, a screw rod assembly and a driving piece. The rear push plate and the front push plate are oppositely arranged on the base and slide along a first direction. The support plate and the front push plate form a first space, and the support plate and the rear push plate form a second space. A plurality of first clamp plates of the clamp plate assembly slide along the first direction in the first space, and a plurality of second clamp plates slide along the first direction in the second space. A clamp cavity is formed between adjacent two first clamp plates and between adjacent two second clamp plates. One end of the screw rod is threadedly connected with the front push plate, and the other end is threadedly connected with the rear push plate. The middle part of the screw rod is movably connected with the support plate. The screw rod comprises a first thread section and a second thread section with opposite rotation directions. The first thread section corresponds to the first space, and the second thread section is arranged in the second space. The driving piece is used for driving the screw rod to rotate. The formation clamp can make the batteries in each clamp cavity receive consistent pressure.

Description

Technical Field

[0001] This utility model relates to the field of battery processing equipment technology, and in particular to a formation fixture and a formation machine. Background Technology

[0002] The formation process is one of the key steps in the production of lithium-ion batteries. It involves heating, pressurizing, and activating the battery cell through electrochemical reactions, directly affecting core performance characteristics such as capacity, internal resistance, and cycle life. The formation process is performed using a formation machine during battery production.

[0003] The formation fixture, as one of the core mechanisms in the formation machine, is crucial for the uniformity of battery pressure and the consistency of formation. In related technologies, the formation fixture typically adopts a frame structure. Specifically, a rigid frame is fixedly connected between the front and rear upright plates of the formation fixture. Multiple guide posts and lead screws are arranged vertically within the frame. The lead screws are connected to a push plate for driving the push plate to slide axially along the guide posts. Multilayer pressure plates are slidably fitted onto the multiple guide posts, forming cavities between adjacent pressure plates to accommodate the battery cells. During operation, the drive unit drives the push plate to move axially along the guide posts. The push plate transmits thrust through contact with the pressure plates, pushing each pressure plate to synchronously compress the battery cells at the corresponding positions, achieving pressure formation.

[0004] However, during the sliding process, the pressure plate generates a large sliding friction resistance between the pressure plate and the guide post. This resistance causes the thrust to gradually decrease during transmission, resulting in a gradient deviation in the clamping pressure between adjacent pressure plates. Furthermore, as the number of pressure plates increases, the pressure difference between the batteries in the clamping cavities at the beginning and end positions increases significantly. This causes the batteries in the same fixture to experience inconsistent pressures during the formation process, leading to significant differences in the performance of batteries from the same batch. Utility Model Content

[0005] This application discloses a formation fixture and a formation machine, which can make the pressure on each battery in the formation fixture basically the same, which is beneficial to improving battery consistency.

[0006] To achieve the above objectives, this application discloses a chemical conversion fixture, comprising: Base; A push plate assembly, the push plate assembly including a front push plate and a rear push plate, wherein along a first direction, the rear push plate and the front push plate are spaced apart from each other and are both slidably disposed relative to the base; A support plate is disposed on the base and located between the front push plate and the rear push plate. A first space is formed between the support plate and the front push plate, and a second space is formed between the support plate and the rear push plate. A clamping assembly, comprising a plurality of first clamping plates and a plurality of second clamping plates, wherein the plurality of first clamping plates are arranged along a first direction and slidably disposed in a first space, and the plurality of second clamping plates are arranged along the first direction and slidably disposed in a second space, wherein a clamping cavity for accommodating a solid-state battery to be formed is formed between two adjacent first clamping plates and between two adjacent second clamping plates. A lead screw assembly includes a lead screw extending along the first direction, one end of the lead screw being threadedly connected to the front push plate and the other end being threadedly connected to the rear push plate, the middle part of the lead screw being movably connected to the support plate, and the lead screw including a first threaded segment and a second threaded segment that are connected to each other and have opposite directions of rotation, the first threaded segment being disposed corresponding to the first space and the second threaded segment being disposed corresponding to the second space; A driving component, the driving end of which is connected to the lead screw, is used to drive the lead screw to rotate relative to the support plate.

[0007] Optionally, the support plate is slidably disposed on the base along the first direction.

[0008] Optionally, the lead screw further includes a smooth rod section connected between the first threaded section and the second threaded section. The lead screw assembly also includes a bearing. The support plate is provided with a through hole extending along the first direction. The bearing is embedded in the through hole, and the outer ring of the bearing is fixedly connected to the hole wall of the through hole. The inner ring of the bearing is sleeved on the smooth rod section.

[0009] Optionally, the sliding distance of the support plate along the first direction is a, and the thickness of the first clamping plate and / or the thickness of the second clamping plate is b, where 1.5×b≤a≤2×b.

[0010] Optionally, a limiting component is provided on the base to limit the sliding distance of the support plate along the first direction.

[0011] Optionally, the limiting component includes a limiting groove, the support plate includes a body and an ear plate, the body has two opposite sides along the width direction of the body, the width direction of the body is perpendicular to the first direction, the ear plate is disposed on at least one of the two sides, the ear plate is movably sleeved on the middle of the lead screw, and the side of the ear plate facing the base is slidably located in the limiting groove along the first direction.

[0012] Optionally, the limiting groove has a first groove sidewall and a second groove sidewall opposite to each other along the first direction, and a buffer is provided on the first groove sidewall and / or the second groove sidewall.

[0013] Optionally, there are multiple lead screws, which are arranged on both sides of the front push plate along the width direction of the front push plate. The width direction is perpendicular to the first direction. The number of lead screws on both sides of the front push plate is equal, and their positions are opposite.

[0014] Optionally, the thickness of the first clamping plate closest to the support plate among the plurality of first clamping plates is less than the thickness of the first clamping plate closest to the push plate among the plurality of first clamping plates; and / or The thickness of the second clamping plate closest to the support plate among the plurality of second clamping plates is less than the thickness of the second clamping plate closest to the rear push plate among the plurality of second clamping plates.

[0015] Secondly, this application also discloses a chemical formation machine, including the chemical formation fixture described in any one of the first aspects.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: This application utilizes a rear push plate and a front push plate that are spaced apart and slidably arranged relative to the base along a first direction. One end of a lead screw is threadedly connected to the front push plate, and the other end is threadedly connected to the rear push plate. This allows the lead screw to drive the front and rear push plates to slide towards or away from each other along the first direction, thereby pressing or releasing the solid-state battery to be formed within the clamping cavity. This effectively shortens the time required to press or release the solid-state battery within the clamping cavity, improving efficiency. Furthermore, it reduces the sliding distance of multiple first and second clamping plates, thereby reducing the pushing force on the first clamping plate. The attenuation of the force and the thrust on the second clamping plate ensures that the pressure on the solid-state battery to be formed near the front push plate is not much different from the pressure on the solid-state battery to be formed near the support plate, and the pressure on the solid-state battery to be formed near the rear push plate is not much different from the pressure on the solid-state battery to be formed near the support plate. This allows the pressure on the solid-state battery to be formed in each clamping cavity to be basically consistent, improving the consistency of the formation effect of batteries in the same batch and contributing to the improvement of battery consistency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of a chemical formation fixture provided in an embodiment of this application; Figure 2 yes Figure 1 Enlarged view of position A in the middle; Figure 3 This is a front view of a formation fixture provided in one embodiment of this application; Figure 4 This is a top view of a chemical bonding fixture provided in one embodiment of this application; Figure 5 This is a structural schematic diagram of a support plate and a base provided in an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures: 1-Push plate assembly; 11-Front push plate; 12-Rear push plate; 2-Support plate; 21-Body; 22-Ear plate; 3-Clamping plate assembly; 31-First clamping plate; 32-Second clamping plate; 33-Clamping cavity; 4-Screw assembly; 41-Screw; 411-First threaded section; 412-Second threaded section; 413-Smooth section; 5-Drive components; 6-Limiting component; 61-Limiting groove; 611-First groove sidewall; 612-Second groove sidewall; 62-Buffer component; 7a - First space; 7b - Second space; 8-Base; 10-Chemicalization fixture. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0022] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0025] The formation process is one of the key steps in the production of lithium-ion batteries. It involves heating, pressurizing, and activating the battery cell through electrochemical reactions, directly affecting core performance characteristics such as capacity, internal resistance, and cycle life. The formation process is performed using a formation machine during battery production.

[0026] The formation fixture, as one of the core mechanisms in the formation machine, is crucial for the uniformity of battery pressure and the consistency of formation. In related technologies, the formation fixture typically adopts a frame structure. Specifically, a rigid frame is fixedly connected between the front and rear upright plates of the formation fixture. Multiple guide posts and lead screws are arranged vertically within the frame. The lead screws are connected to a push plate for driving the push plate to slide axially along the guide posts. Multilayer pressure plates are slidably fitted onto the multiple guide posts, forming cavities between adjacent pressure plates to accommodate the battery cells. During operation, the drive unit drives the push plate to move axially along the guide posts. The push plate transmits thrust through contact with the pressure plates, pushing each pressure plate to synchronously compress the battery cells at the corresponding positions, achieving pressure formation.

[0027] However, during the sliding process of the pressure plates, significant sliding frictional resistance is generated between the pressure plates and the guide posts. This resistance causes the thrust to gradually decrease during transmission. Specifically, the first pressure plate is directly driven by the push plate and experiences the greatest thrust, while each subsequent pressure plate must overcome the frictional resistance between the preceding pressure plate and the guide posts to be pushed, resulting in a progressively decreasing effective thrust. Consequently, the clamping pressure between adjacent pressure plates exhibits a gradient deviation. Furthermore, as the number of pressure plates increases, the pressure difference between the batteries in the clamping cavities at the beginning and end positions significantly widens. This leads to inconsistent pressure experienced by the batteries within the same clamp during formation. Cells under insufficient pressure may have low capacity due to incomplete reaction, while cells under excessive pressure may exhibit abnormal internal resistance due to excessive electrode deformation. Ultimately, this results in significant differences in the performance parameters of batteries from the same batch.

[0028] Based on this, this application discloses a formation fixture and a formation machine, which can make the pressure on the solid-state battery in each clamping cavity of the formation fixture more consistent, which is beneficial to improving the consistency of solid-state batteries.

[0029] The technical solution of this application will be further described below with reference to specific embodiments and accompanying drawings.

[0030] This application provides a formation fixture, such as Figures 1-4 As shown, the chemical forming fixture 10 includes a base (not shown), a push plate assembly 1, a support plate 2, a clamping plate assembly 3, a lead screw assembly 4, and a driving component 5. The push plate assembly 1 includes a front push plate 11 and a rear push plate 12, along a first direction (e.g., ...). Figure 1 (In the direction shown by x), the rear push plate 12 and the front push plate 11 are spaced apart and slidably disposed relative to the base; the support plate 2 is disposed on the base and located between the front push plate 11 and the rear push plate 12, a first space 7a is formed between the support plate 2 and the front push plate 11, and a second space 7b is formed between the support plate 2 and the rear push plate 12; the clamping plate assembly 3 includes a plurality of first clamping plates 31 and a plurality of second clamping plates 32, the plurality of first clamping plates 31 are arranged along a first direction and slidably disposed in the first space 7a, the plurality of second clamping plates 32 are all arranged along the first direction and slidably disposed in the second space 7b, and the space between adjacent first clamping plates 31 and adjacent second clamping plates 32 is slidably disposed in the second space 7b. Each of the two adjacent second clamping plates 32 has a clamping cavity 33 for accommodating the solid-state battery to be formed; the lead screw assembly 4 includes a lead screw 41 extending along a first direction, one end of the lead screw 41 is threadedly connected to the front push plate 11, the other end is threadedly connected to the rear push plate 12, the middle part of the lead screw 41 is movably connected to the support plate 2, the lead screw 41 includes a first threaded section 411 and a second threaded section 412 that are connected to each other and have opposite directions of rotation, the first threaded section 411 is correspondingly arranged with the first space 7a, and the second threaded section 412 is correspondingly arranged with the second space 7b; the driving end of the driving member 5 is connected to the lead screw 41 and is used to drive the lead screw 41 to rotate relative to the support plate 2.

[0031] In this embodiment, the rear push plate 12 and the front push plate 11 are spaced apart and slidably disposed relative to the base along the first direction. One end of the lead screw 41 is threadedly connected to the front push plate 11, and the other end is threadedly connected to the rear push plate 12. The driving end of the driving member 5 is connected to the lead screw 41 to drive the lead screw 41 to rotate relative to the support plate 2. A plurality of first clamping plates 31 are arranged along the first direction and slidably disposed in the first space 7a. A plurality of second clamping plates 32 are arranged along the first direction and slidably disposed in the second space 7b, so as to drive the lead screw 41 to rotate relative to the support plate 2. When the lead screw 41 rotates, it can drive the front push plate 11 and the rear push plate 12 to slide towards each other along the first direction, so that the multiple first clamping plates 31 and the multiple second clamping plates 32 can slide towards the support plate 2 along the first direction, thereby pressing the solid-state battery to be formed in the clamping cavity 33. Alternatively, the lead screw 41 can drive the front push plate 11 and the rear push plate 12 to slide away from each other along the first direction, so that the multiple first clamping plates 31 and the multiple second clamping plates 32 can slide away from the support plate 2 along the first direction, releasing the pressure on the battery in the clamping cavity 33. That is, when pressing or releasing the solid-state battery to be formed in the clamping cavity 33, the lead screw 41 can simultaneously drive the front push plate 11 and the rear push plate 12 to slide towards each other or away from each other along the first direction, reducing the number of rotations of the lead screw 41, effectively shortening the time for pressing or releasing the solid-state battery to be formed in the clamping cavity 33, improving efficiency, and thus helping to improve the formation efficiency of the solid-state battery to be formed.

[0032] In this method, the lead screw 41 drives the front push plate 11 and the rear push plate 12 to slide towards each other in a first direction, so that the multiple first clamping plates 31 slide toward the support plate 2 and the multiple second clamping plates 32 slide toward the support plate 2. Compared with the method of sliding the multiple first clamping plates 31 and the multiple second clamping plates 32 in the direction from the front push plate 11 to the rear push plate 12 to press the solid-state battery to be formed in the clamping cavity 33, this method effectively reduces the sliding distance of the multiple first clamping plates 31 and the multiple second clamping plates 32, thereby reducing the thrust on the first clamping plate 31 and the thrust on the second clamping plate 32. The attenuation of the thrust ensures that the pressure on the solid-state battery to be formed near the front push plate 11 is not significantly different from that near the support plate 2, and the pressure on the solid-state battery to be formed near the rear push plate 12 is also not significantly different from that near the support plate 2. This allows the pressure on the solid-state batteries to be formed in each clamping cavity 33 to be basically consistent, improving the consistency of the formation effect of solid-state batteries in the same batch and promoting the overall consistency of solid-state batteries. At the same time, it also allows the support plate 2 to withstand a certain amount of pressure, reducing the pressure on the front push plate 11 and the rear push plate 12, thereby reducing the requirements for the thickness, strength, and flatness of the front push plate 11 and the rear push plate 12, thus reducing the manufacturing difficulty of the front push plate 11 and the rear push plate 12 and facilitating cost control.

[0033] In addition, the middle part of the lead screw 41 is movably connected to the support plate 2, which allows the support plate 2 to provide certain support for the lead screw 41, effectively reducing the probability of bending deformation of the lead screw 41 and improving the stability of the rotation of the lead screw 41. This not only improves the service life of the lead screw 41, but also helps to improve the accuracy of the lead screw 41 rotating to drive the front push plate 11 and the rear push plate 12 to slide.

[0034] The connection between the middle part of the lead screw 41 and the support plate 2 can be such that the lead screw 41 rotates relative to the support plate 2, or the lead screw 41 rotates relative to the support plate 2. At the same time, the support plate 2 can also slide along the lead screw 41. This embodiment does not limit this.

[0035] The driving component 5 may include any of the following: a motor, a rotary cylinder, etc., and this embodiment does not limit the type of motor. For example, when the driving component 5 includes a motor, the motor can be connected to the lead screw 41 through a gear assembly to drive the lead screw 41 to rotate. The lead screw 41 drives the front push plate 11 and the rear push plate 12 to slide towards or away from each other along the first square.

[0036] The first clamping plate 31 and the second clamping plate 32 can be clamping plates of the same size and thickness, so that the pressure on the solid-state battery to be formed in each clamping cavity 33 can be approximately the same. In addition, the number of first clamping plates 31 can be the same as the number of second clamping plates 32, which can make the pressure on each solid-state battery to be formed on both sides of the support plate 2 more consistent.

[0037] The number of first clamping plates 31 can be two, three, or more; this embodiment does not limit this. Similarly, the number of second clamping plates 32 can also be two, three, or more; this is also not limited.

[0038] Of course, in other embodiments, the formation fixture can also clamp and fix lithium-ion batteries or pouch batteries, which helps to improve the formation quality of the batteries.

[0039] Furthermore, the rear push plate 12 can be slidably mounted relative to the base. This can be either directly mounted on the base or suspended above it, sliding relative to the base in the first direction via the lead screw 41. No limitation is made here. Similarly, the implementation of the front push plate 11 sliding relative to the base is largely the same as that of the rear push plate 12, and will not be elaborated further here.

[0040] Optionally, the formation fixture 10 may further include a front upright plate, a rear upright plate, and a guide rod. The front upright plate and the rear upright plate are both fixed to the base. The guide rod extends along the first direction, and both ends of the guide rod are connected to the front upright plate and the rear upright plate, respectively. The driving member 5 may be fixed to the front upright plate. A plurality of first clamping plates 31 and a plurality of second clamping plates 32 may be slidably connected to the guide rod, so that the guide rod can guide the plurality of first clamping plates 31 and a plurality of second clamping plates 32 to slide along the first direction, thereby avoiding the displacement of the plurality of first clamping plates 31 and a plurality of second clamping plates 32 when sliding along the first direction, which is beneficial to improving the clamping effect on the solid-state battery to be formed in the clamping cavity 33.

[0041] The sliding connection between the multiple first clamping plates 31 and the multiple second clamping plates 32 and the guide rod can be achieved by having a first sliding hole provided on each of the multiple first clamping plates 31 and the multiple second clamping plates 32, with the guide rod sequentially passing through the first sliding holes of the multiple first clamping plates 31 and the multiple second clamping plates 32. This structure is simple and easy to implement. Furthermore, a first bearing can also be embedded in the first sliding hole, with the inner ring of the first bearing sleeved on the guide rod, so that the sliding of the multiple first clamping plates 31 and the multiple second clamping plates 32 along the guide rod can be smooth, reducing the frictional resistance encountered by the first clamping plates 31 and the second clamping plates 32 during the sliding process.

[0042] In addition, the guide rod can also be slidably connected to the front push plate 11 and the rear push plate 12. For example, the front push plate 11 and the rear push plate 12 can be provided with sliding holes. The guide rod passes through the sliding holes and is slidably connected to a plurality of first clamping plates 31 and a plurality of second clamping plates 32 to guide the front push plate 11 and the rear push plate 12 to slide in the first direction.

[0043] The aforementioned support plate 2 is disposed on the base. It can be fixed to the base or it can be slidably disposed on the base along the first direction. This allows it to slide a certain distance relative to the base when the pressure on both sides of the support plate 2 is different, so that the pressure on the solid-state batteries to be formed on both sides of the support plate 2 is more consistent.

[0044] The following is a detailed description of the example of the support plate 2 being slidably mounted on the base along the first direction.

[0045] Optionally, the lead screw 41 further includes a smooth rod section 413 connected between the first threaded section 411 and the second threaded section 412. The lead screw assembly 4 also includes a bearing. The support plate 2 is provided with a through hole extending in the first direction. The bearing is embedded in the through hole, and the outer ring of the bearing is fixedly connected to the hole wall of the through hole. The inner ring of the bearing is sleeved on the smooth rod section 413.

[0046] This effectively reduces the frictional resistance between the support plate 2 and the lead screw 41. On the one hand, it reduces the energy consumption during the rotation of the lead screw 41, thereby reducing the power requirement for the drive component 5. On the other hand, it reduces the degree of yaw during the rotation of the lead screw 41, which helps to improve the stability of the rotation of the lead screw 41. This, in turn, helps to improve the uniformity of pressure between the front push plate 11 and the rear push plate 12 when they move in opposite directions, and further helps to improve the consistency of the battery.

[0047] In addition, the sliding distance of the support plate 2 along the first direction is a, the thickness of the first clamping plate 31 and / or the thickness of the second clamping plate 32 is b, and 1.5×b≤a≤2×b.

[0048] Therefore, the sliding distance of the support plate 2 along the first direction is not less than 1.5 times the thickness of the first clamping plate 31 or the second clamping plate 32, so as to provide sufficient space for the placement and removal of the battery close to the support plate 2. At the same time, the sliding distance of the support plate 2 along the first direction is not greater than 2 times the thickness of the first clamping plate 31 or the second clamping plate 32, so that the pressure on both sides of the support plate 2 can be more consistent, which is conducive to improving the consistency of the pressure on the solid battery to be formed in the clamping cavity 33, thereby further improving the consistency of the battery.

[0049] The sliding distance of the support plate 2 along the first direction can be 1.5×b, 2×b, or any value between 1.5×b and 2×b. This embodiment does not limit this value.

[0050] In addition, the length of the smooth section 413 of the lead screw 41 is greater than or equal to the sliding distance of the support plate 2 along the first direction, so as to prevent the bearing from interfering with the first threaded section 411 or the second threaded section 412.

[0051] Optionally, such as Figure 5 As shown, a limiting component 6 is provided on the base 8, which is used to limit the sliding distance of the support plate 2 along the first direction.

[0052] Therefore, the sliding distance of the support plate 2 along the first direction can be limited by the limiting component 6, which is beneficial to the control of the sliding distance of the support plate 2 along the first direction.

[0053] The limiting component 6 can be implemented in various ways. In one possible implementation, the limiting component 6 may include a first limiting protrusion and a second limiting protrusion. The first limiting protrusion and the second limiting protrusion are arranged on the base 8 at intervals along the first direction. A portion of the support plate 2 is located between the first limiting protrusion and the second limiting protrusion. The structure is simple and easy to implement.

[0054] In another implementation of the limiting component 6, such as Figure 2 and Figure 5As shown, the limiting component 6 includes a limiting groove 61, and the support plate 2 includes a body 21 and an ear plate 22. The body 21 has two opposite sides along the width direction of the body 21, and the width direction of the body 21 is perpendicular to the first direction. The ear plate 22 is disposed on at least one of the two sides. The ear plate 22 is movably sleeved on the middle of the lead screw 41, and the side of the ear plate 22 facing the base 8 is slidably located in the limiting groove 61 along the first direction.

[0055] Therefore, while effectively limiting the sliding distance of the support plate 2 along the first direction, it can also effectively reduce the space occupied by the limiting component 6. At the same time, the limiting groove 61 can also limit the radial movement of the support plate 2 along the lead screw 41, which is conducive to the smooth sliding of the support plate 2 along the first direction.

[0056] The ear plate 22 can be movably sleeved on the middle part of the lead screw 41 via a bearing. For example, the ear plate 22 can be provided with a through hole, the outer ring of the bearing is fixedly connected to the inner wall of the through hole, and the inner ring of the bearing is movably sleeved on the middle part of the lead screw 41.

[0057] In addition, the limiting groove 61 has a first groove sidewall 611 and a second groove sidewall 612 that are opposite each other in the first direction, and a buffer member 62 is provided on the first groove sidewall 611 and / or the second groove sidewall 612.

[0058] Therefore, by setting the buffer 62, hard collisions between the support plate 2 and the side wall of the limiting groove 61 can be effectively prevented, and the impact energy when the support plate 2 slides to the limit position can be absorbed, so that the support plate 2 can stop sliding smoothly. This facilitates the smooth operation of the formation fixture 10 when pressing the solid-state battery to be formed, thereby improving the battery formation effect.

[0059] The buffer 62 may be provided on the first groove sidewall 611, or on the second groove sidewall 612, or both the first groove sidewall 611 and the second groove sidewall 612 may be provided with buffer 62. This embodiment does not limit this.

[0060] In addition, the buffer 62 may include at least one of springs, rubber pads, and foamed silicone, which is easy to implement and helps control costs.

[0061] Optionally, the buffer member 62 can be disposed on the first groove sidewall 611 in various ways. For example, the buffer member 62 can be glued to the first groove sidewall 611; alternatively, the first groove sidewall 611 can be provided with a receiving groove, and the buffer member 62 can be partially embedded in the receiving groove; or the buffer member 62 can be fixed to the first groove sidewall 611 with screws. This embodiment does not limit this. Similarly, the implementation of the buffer member 62 disposed on the second groove sidewall 612 can be roughly the same as the implementation of the buffer member 62 disposed on the first groove sidewall 611, and will not be described in detail here.

[0062] In some embodiments, such as Figures 1-4 As shown, there are multiple lead screws 41, which are arranged on both sides of the front push plate 11 along the width direction of the front push plate 11. The width direction is perpendicular to the first direction. The number of lead screws 41 on both sides of the front push plate 11 is equal and their positions are opposite.

[0063] This allows multiple lead screws 41 to apply thrust from both sides simultaneously, resulting in a more uniform force on the front push plate 11 and the rear push plate 12. This effectively prevents deformation caused by uneven force on the front push plate 11 and the rear push plate 12. At the same time, it also makes it less likely for the front push plate 11 and the rear push plate 12 to deviate when sliding along the first direction, which helps to improve the uniformity of the pressure applied to the solid-state battery to be formed in the clamping cavity 33, thereby further improving the consistency of the battery.

[0064] The number of lead screws 41 can be two, four, or more, and is not limited here. For example, there are four lead screws 41, which are symmetrically arranged in pairs on both sides of the front push plate 11 along its width direction.

[0065] In other embodiments, the thickness of the first clamping plate 31 near the support plate 2 is less than the thickness of the first clamping plate 31 near the front push plate 11; and / or, the thickness of the second clamping plate 32 near the support plate 2 is less than the thickness of the second clamping plate 32 near the rear push plate 12.

[0066] This effectively reduces the contact area between the first clamping plate 31 and the second clamping plate 32 near the support plate 2 and the base 8, thereby reducing the frictional resistance experienced by the first clamping plate 31 and the second clamping plate 32 near the support plate 2 during sliding. This effectively reduces the attenuation of the thrust experienced by the first clamping plate 31 and the second clamping plate 32 near the support plate 2, and further improves the consistency of the pressure experienced by the solid-state batteries to be formed in each clamping cavity 33, thus further improving the consistency of the formation effect of batteries in the same batch.

[0067] For example, the thickness of one-quarter of the first clamping plates 31 closest to the support plate 2 may be less than the thickness of the other first clamping plates 31. Alternatively, the thickness of one-quarter of the first clamping plates 31 closest to the support plate 2 may be the same, while the thickness of the other first clamping plates 31 may be the same. Similarly, the thickness of one-quarter of the second clamping plates 32 closest to the support plate 2 may be less than the thickness of the other second clamping plates 32.

[0068] Optionally, a buffer layer may be provided on the two opposite surfaces of the support plate 2 along the first direction to prevent hard collisions between the support plate 2 and the solid-state battery to be formed or the adjacent first clamping plate 31 or the adjacent second clamping plate 32, so as to absorb some impact energy during the pressing of the battery, which is conducive to the smooth operation of the formation fixture 10 when pressing the solid-state battery to be formed, thereby improving the battery formation effect.

[0069] The implementation of the buffer layer can be roughly the same as that of the buffer 62 described above, and this embodiment does not limit it.

[0070] This application also provides a chemical formation machine, including the chemical formation fixture 10 as described in any of the above embodiments.

[0071] The formation fixture 10 in the formation machine is the formation fixture 10 described in any of the above embodiments. Therefore, the structure of the formation fixture 10 in the formation machine can be the same as the structure of the formation fixture 10 described in any of the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the descriptions in the above embodiments. This embodiment will not repeat the details.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A chemical conversion fixture (10), characterized in that, include: Base (8); The push plate assembly (1) includes a front push plate (11) and a rear push plate (12). Along the first direction, the rear push plate (12) and the front push plate (11) are spaced apart and opposite to each other and are both slidably disposed relative to the base (8). Support plate (2), the support plate (2) is disposed on the base (8) and located between the front push plate (11) and the rear push plate (12), a first space (7a) is formed between the support plate (2) and the front push plate (11), and a second space (7b) is formed between the support plate (2) and the rear push plate (12). The clamping assembly (3) includes a plurality of first clamping plates (31) and a plurality of second clamping plates (32). The plurality of first clamping plates (31) are arranged along the first direction and slidably disposed in the first space (7a). The plurality of second clamping plates (32) are arranged along the first direction and slidably disposed in the second space (7b). A clamping cavity (33) for accommodating a solid-state battery to be formed is formed between two adjacent first clamping plates (31) and between two adjacent second clamping plates (32). The lead screw assembly (4) includes a lead screw (41) extending along the first direction. One end of the lead screw (41) is threadedly connected to the front push plate (11), and the other end is threadedly connected to the rear push plate (12). The middle part of the lead screw (41) is movably connected to the support plate (2). The lead screw (41) includes a first threaded section (411) and a second threaded section (412) that are connected to each other and have opposite directions of rotation. The first threaded section (411) is correspondingly arranged with the first space (7a), and the second threaded section (412) is correspondingly arranged with the second space (7b). The driving component (5) is connected to the lead screw (41) at its driving end, and is used to drive the lead screw (41) to rotate relative to the support plate (2).

2. The chemical formation fixture (10) according to claim 1, characterized in that, The support plate (2) is slidably disposed on the base (8) along the first direction.

3. The chemical formation fixture (10) according to claim 2, characterized in that, The lead screw (41) further includes a smooth rod section (413) connected between the first threaded section (411) and the second threaded section (412). The lead screw assembly (4) also includes a bearing. The support plate (2) is provided with a through hole extending along the first direction. The bearing is embedded in the through hole, and the outer ring of the bearing is fixedly connected to the hole wall of the through hole. The inner ring of the bearing is sleeved on the smooth rod section (413).

4. The chemical formation fixture (10) according to claim 2, characterized in that, The sliding distance of the support plate (2) along the first direction is a, the thickness of the first clamping plate (31) and / or the thickness of the second clamping plate (32) is b, and 1.5×b≤a≤2×b.

5. The chemical formation fixture (10) according to claim 2, characterized in that, A limiting component (6) is provided on the base (8), and the limiting component (6) is used to limit the sliding distance of the support plate (2) along the first direction.

6. The chemical formation fixture (10) according to claim 5, characterized in that, The limiting component (6) includes a limiting groove (61), and the support plate (2) includes a body (21) and an ear plate (22). The body (21) has two opposite sides along the width direction of the body (21), and the width direction of the body (21) is perpendicular to the first direction. The ear plate (22) is disposed on at least one of the two sides. The ear plate (22) is movably sleeved on the middle of the lead screw (41), and the side of the ear plate (22) facing the base (8) is slidably located in the limiting groove (61) along the first direction.

7. The chemical formation fixture (10) according to claim 6, characterized in that, The limiting groove (61) has a first groove sidewall (611) and a second groove sidewall (612) opposite to each other along the first direction, and a buffer (62) is provided on the first groove sidewall (611) and / or the second groove sidewall (612).

8. The chemical formation fixture (10) according to any one of claims 1-7, characterized in that, The number of lead screws (41) is multiple. Multiple lead screws (41) are arranged on both sides of the front push plate (11) along the width direction of the front push plate (11). The width direction is perpendicular to the first direction. The number of lead screws (41) on both sides of the front push plate (11) is equal and their positions are opposite.

9. The chemical formation fixture (10) according to any one of claims 1-7, characterized in that, The thickness of the first clamping plate (31) closest to the support plate (2) among the plurality of first clamping plates (31) is less than the thickness of the first clamping plate (31) closest to the front push plate (11) among the plurality of first clamping plates (31); and / or The thickness of the second clamping plate (32) closer to the support plate (2) among the plurality of second clamping plates (32) is less than the thickness of the second clamping plate (32) closer to the rear push plate (12) among the plurality of second clamping plates (32).

10. A formation machine, characterized in that, Includes the chemical formation fixture (10) as described in any one of claims 1-9.

Images