Formation clamp and battery formation equipment

Abstract

The application discloses a formation clamp and a battery formation equipment. The formation clamp comprises a base, a baffle, a push plate, a clamp plate assembly, a driving piece and a distance control assembly. The push plate and the baffle are oppositely arranged along a first direction. The first clamp plate and the plurality of second clamp plates in the clamp plate assembly are slidably arranged between the baffle and the push plate along the first direction. The first clamp plate and the adjacent second clamp plate and the adjacent two second clamp plates have intervals. The driving piece is used for driving the push plate to slide along the first direction, so as to drive the first clamp plate and the plurality of second clamp plates to slide along the first direction. Each second clamp plate is connected with the transmission unit on the adjacent second clamp plate or the first clamp plate through the transmission unit in the plurality of distance control assemblies. The transmission unit is used for making each interval have the same size along the first direction when the push plate slides away from the baffle along the first direction. The formation clamp makes the position of the battery in the interval more accurate, is beneficial to grasping the battery in the interval, and improves the production efficiency.

Description

Technical Field

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

[0002] Battery formation is the first charging process of a battery after electrolyte injection. This process activates the active materials in the battery, thus activating it. During battery formation, the battery to be formed is placed in a formation fixture, which applies restraint forces to the battery.

[0003] Under low pressure, the formation clamp typically increases the cushioning thickness by adding expanded silicone foam to accommodate batteries of varying thicknesses. This allows the foamed silicone, with its good elasticity and high compressibility, to maintain a controllable lateral clearance, ensuring the battery's relatively accurate positioning within the channel. This enables the overhead crane to precisely grasp the battery during the gripping process.

[0004] However, under high pressure, the pressure exerted by the battery on the foamed silicone exceeds the yield limit of the foamed silicone. After the formation fixture is opened, the foamed silicone cannot return to its state before being compressed. This makes it impossible to achieve a relatively accurate position of the battery in the channel when the formation fixture is open by adapting and filling the foamed silicone. Utility Model Content

[0005] This application discloses a formation fixture and a battery formation device, which enables the battery to be positioned more accurately within the interval, facilitating the crane's gripping of the battery within the interval.

[0006] To achieve the above objectives, firstly, a forming fixture includes: Base; A baffle, which is fixedly mounted on the base; A push plate, which is disposed opposite to the baffle along a first direction and is slidably disposed on the base; A clamping plate assembly, the clamping plate assembly including a first clamping plate and a plurality of second clamping plates arranged along the first direction, the first clamping plate and the plurality of second clamping plates being slidably disposed between the baffle and the push plate, and a gap being provided between the first clamping plate and an adjacent second clamping plate and between two adjacent second clamping plates, the gap being used to accommodate a battery to be formed; A driving component, the driving end of which is connected to the push plate, is used to drive the push plate to slide along the first direction, thereby driving the first clamping plate and a plurality of second clamping plates to slide along the first direction; The distance control assembly includes a transmission unit, wherein the first clamping plate and the second clamping plate, as well as adjacent second clamping plates, are respectively connected through the transmission unit. The transmission unit is used to ensure that each of the intervals has the same size along the first direction when the push plate slides away from the baffle along the first direction.

[0007] Optionally, a plurality of second clamping plates are located between the first clamping plate and the baffle. The transmission unit includes a rack and a gear. The first clamping plate is fixedly connected to one of the racks. Each second clamping plate is fixedly connected to one of the racks and rotatably connected to one of the gears. The racks extend along the first direction. Each gear meshes with the racks on the adjacent second clamping plates on both sides. The racks on the first clamping plate mesh with the gears on the adjacent second clamping plates.

[0008] Optionally, among the two gears meshing with the same rack, the distance between the rotation center axis of one of the two gears and the second clamping plate correspondingly connected to the rack is a first distance, and the distance between the rotation center axis of the other of the two gears and the second clamping plate correspondingly connected to the rack is a second distance, the second distance being equal to the first distance.

[0009] Optionally, the plurality of second clamping plates include a plurality of even-numbered rows of second clamping plates and a plurality of odd-numbered rows of second clamping plates, wherein the plurality of odd-numbered rows of second clamping plates and the plurality of even-numbered rows of second clamping plates are arranged alternately along the first direction, wherein the even-numbered rows of second clamping plates are the second clamping plates located in even-numbered columns along the direction from the first clamping plate to the baffle, and the odd-numbered rows of second clamping plates are the second clamping plates located in odd-numbered columns along the direction from the first clamping plate to the baffle; The rotation center axes of the gears rotatably connected to the odd-numbered second clamping plates are all located in the same first plane perpendicular to the second clamping plates; The rotation center axes of the gears rotatably connected to the even-numbered second clamping plates are all located in the same second plane perpendicular to the second clamping plates. The second plane and the first plane are two non-coincident planes.

[0010] Optionally, the two racks meshing with the same gear are located on opposite sides of the gear in a direction parallel to the second clamping plate.

[0011] Optionally, the four racks that mesh with the two adjacent gears are arranged in a direction parallel to the second clamping plate.

[0012] Optionally, the rack has a first end and a second end opposite to each other along the first direction, the distance between the first end and the second clamping plate connected to the rack is a third distance, and the distance between the second end and the second clamping plate connected to the rack is a fourth distance, the fourth distance being equal to the third distance.

[0013] Optionally, the rack is provided with limiting structures at both ends, and the limiting structures are used to prevent the gear from disengaging from the meshing rack.

[0014] Optionally, a plurality of second clamping plates are located between the first clamping plate and the baffle. The plurality of second clamping plates include a plurality of even-numbered rows of second clamping plates and a plurality of odd-numbered rows of second clamping plates. The plurality of odd-numbered rows of second clamping plates and the plurality of even-numbered rows of second clamping plates are arranged alternately along the first direction. The even-numbered rows of second clamping plates are the second clamping plates located in even-numbered columns along the direction from the first clamping plate to the baffle, and the odd-numbered rows of second clamping plates are the second clamping plates located in odd-numbered columns along the direction from the first clamping plate to the baffle. The transmission unit further includes a first link and a second link. The middle parts of the first link and the middle parts of the second link are hinged to each other by a hinge shaft. Each of the odd-numbered rows of second clamping plates is rotatably connected to the hinge shaft. The end of the first link is hinged to the end of the second link of the adjacent transmission unit, and the end of the second link is hinged to the end of the first link of the adjacent transmission unit. Wherein, the ends of the first link and the second link are slidably connected to the corresponding even-numbered row of second clamping plates, and the sliding direction of the ends of the first link and the second link is along the height direction of the even-numbered row of second clamping plates.

[0015] Optionally, the side of the odd-numbered row of second clamping plates has a first connection point, which is located in the middle region of the side along the first direction. The transmission unit is rotatably connected to the first connection point of the corresponding odd-numbered row of second clamping plates via the hinge shaft. The portions of the first connecting rod located on both sides of the hinge shaft and the portions of the second connecting rod located on both sides of the hinge shaft are symmetrical about the center of the hinge shaft.

[0016] Optionally, the even-numbered row of second clamping plates has a connecting surface facing the distance control component, and a sliding groove is provided on the connecting surface. The sliding groove extends along the height direction of the even-numbered row of second clamping plates, and sliders are respectively provided at both ends of the first connecting rod and / or at both ends of the second connecting rod. The sliders are slidably disposed in the sliding groove.

[0017] Optionally, a mounting component is provided on the connecting surface, and the sliding groove is provided on the mounting component.

[0018] Optionally, a plurality of second clamping plates are located between the first clamping plate and the baffle. The transmission unit further includes a first connecting rod and a second connecting rod. The middle portions of the first connecting rod and the second connecting rod are hinged to each other via a hinge shaft. The first clamping plate and each of the second clamping plates are rotatably connected to the corresponding transmission unit via the hinge shaft. The end of the first connecting rod is hinged to the end of the second connecting rod of the adjacent transmission unit, and the end of the second connecting rod is hinged to the end of the first connecting rod of the adjacent transmission unit.

[0019] Secondly, this application also discloses a battery formation apparatus, including the formation fixture described in any one of the first aspects.

[0020] Compared with the prior art, the beneficial effects of this application are as follows: This application connects the first clamping plate, the second clamping plate, and adjacent second clamping plates via transmission units. The transmission units ensure that each interval has the same dimension along the first direction when the push plate slides away from the baffle along the first direction. This allows the drive unit to drive the push plate to slide away from the baffle along the first direction, causing the first clamping plate and multiple second clamping plates to slide away from the baffle along the first direction. This ensures that the distance between the first clamping plate and adjacent second clamping plates, as well as the distance between two adjacent second clamping plates, is approximately the same. This allows for more precise positioning of the battery within the interval, ensuring that the distance between batteries in each adjacent interval is approximately the same. This facilitates the overhead crane's gripping of batteries within the interval, thereby improving battery production efficiency. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a perspective view of the chemical formation fixture provided in the embodiments of this application; Figure 2 This is a front view of the chemical formation fixture provided in the embodiments of this application; Figure 3 This is a top view of the chemical formation fixture provided in the embodiments of this application; Figure 4 yes Figure 2 Enlarged view of position A in the middle; Figure 5 This is a schematic diagram of a gear, rack, and clamp assembly assembly provided in an embodiment of this application; Figure 6This is a schematic diagram of a combination of a gear, a rack, a first clamping plate, and part of a second clamping plate provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of the first combination of the first link, the second link, the first clamping plate, and part of the second clamping plate provided in the embodiments of this application; Figure 8 This is a schematic diagram of the structure of the second combination of the first link, the second link, the first clamping plate, and part of the second clamping plate provided in the embodiments of this application.

[0023] Explanation of reference numerals in the attached figures: 1-Baffle; 2-Push plate; 3-Clamping plate assembly; 31-First clamping plate; 32-Second clamping plate; 321-First connection point; 33-Gap; 4-Drive components; 5-Distance control assembly; 51-Transmission unit; 511-Rack; 5111-First end; 5112-Second end; 512-Gear; 513-First connecting rod; 514-Second connecting rod; 6-Installation component; 61-Slide groove; 10-Chemicalization fixture. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Battery formation is the first charging process of a battery after electrolyte injection. This process activates the active materials in the battery, thus activating it. During battery formation, the battery to be formed is placed in a formation fixture, which applies restraint forces to the battery.

[0030] Under low pressure, the formation clamp typically increases the cushioning thickness by adding expanded silicone foam to accommodate batteries of varying thicknesses. This allows the foamed silicone, with its good elasticity and high compressibility, to maintain a controllable lateral clearance, ensuring the battery's relatively accurate positioning within the channel. This enables the overhead crane to precisely grasp the battery during the gripping process.

[0031] However, under high pressure, the pressure exerted by the battery on the foamed silicone exceeds the yield limit of the foamed silicone. After the formation fixture is opened, the foamed silicone cannot return to its state before being compressed. This makes it impossible to achieve a relatively accurate position of the battery in the channel when the formation fixture is open by adapting and filling the foamed silicone.

[0032] Based on this, this application provides a formation fixture and a battery formation device to solve the above problems.

[0033] The technical solution of this application will be further described below with reference to specific embodiments and accompanying drawings.

[0034] Figure 1 This is a perspective view of the chemical formation fixture provided in the embodiments of this application. Figure 2 This is a front view of the formation fixture provided in the embodiments of this application. Figure 3 This is a top view of the chemical formation fixture provided in the embodiments of this application. Figure 4 yes Figure 2 A magnified view of position A in the middle.

[0035] This application provides a formation fixture; please refer to [reference needed]. Figures 1-4 As shown, it includes a base (not shown in the figure), a baffle 1, a push plate 2, a clamping plate assembly 3, a driving component 4, and a distance control assembly 5. The baffle 1 is fixed to the base; the push plate 2 and the baffle 1 are aligned along a first direction (e.g., ...). Figure 1 The components are arranged opposite each other (in the direction shown by x) and slidably mounted on the base; the clamping plate assembly 3 includes a first clamping plate 31 and a plurality of second clamping plates 32 arranged along a first direction. The first clamping plate 31 and the plurality of second clamping plates 32 are slidably mounted between the baffle 1 and the push plate 2. There is a gap 33 between the first clamping plate 31 and the adjacent second clamping plate 32, as well as between two adjacent second clamping plates 32. The gap 33 is used to accommodate the battery to be formed; the driving end of the driving member 4 is connected to the push plate 2 and is used to drive the push plate 2 to slide along the first direction, so as to drive the first clamping plate 31 and the plurality of second clamping plates 32 to slide along the first direction; the distance control assembly 5 includes a transmission unit 51. The first clamping plate 31, the second clamping plate 32 and the adjacent second clamping plates 32 are respectively connected to each other through the transmission unit 51. The transmission unit 51 is used to make each gap 33 have the same size along the first direction when the push plate 2 slides away from the baffle 1 along the first direction.

[0036] It should be noted that "each interval 33 has the same size along the first direction" means that each interval 33 has approximately the same size along the first direction, not that each interval 33 must have the same size along the first direction.

[0037] In this embodiment, the push plate 2 and the baffle 1 are arranged opposite each other along the first direction, and the push plate 2 is slidably disposed on the base; the first clamping plate 31 and multiple second clamping plates 32 in the clamping plate assembly 3 are slidably disposed between the baffle 1 and the push plate 2, and there is a gap 33 between the first clamping plate 31 and the adjacent second clamping plate 32 and between two adjacent second clamping plates 32, the gap 33 is used to accommodate the battery to be formed; the driving end of the driving member 4 is connected to the push plate 2 and is used to drive the push plate 2 to slide along the first direction, so as to drive the first clamping plate 31 and multiple second clamping plates 32 to slide along the first direction, so that the battery to be formed can be placed in the gap 33 accordingly when forming the battery. Then, the drive unit 4 drives the push plate 2 to slide along the first direction toward the baffle 1, which in turn drives the first clamping plate 31 and multiple second clamping plates 32 to slide along the first direction toward the baffle 1 until the battery to be formed is clamped and fixed, and a restraining force is applied to the battery to be formed. After the formation is completed, the drive unit 4 can be activated to drive the push plate 2 to slide along the first direction away from the baffle 1, so that the first clamping plate 31 can slide along the first direction away from the baffle 1, thereby increasing the distance between the first clamping plate 31 and the second clamping plate 32 and the distance between two adjacent second clamping plates 32, thereby releasing the clamping and fixing of the battery located in the interval 33, making it convenient for the crane to remove the battery in the interval 33.

[0038] The first clamping plate 31 and the second clamping plate 32, as well as adjacent second clamping plates 32, are connected by a transmission unit 51. The transmission unit 51 is used to ensure that each interval 33 has the same size in the first direction when the push plate 2 slides away from the baffle 1 in the first direction. This allows the drive member 4 to drive the push plate 2 to slide away from the baffle 1 in the first direction, thereby causing the first clamping plate 31 and multiple second clamping plates 32 to slide away from the baffle 1 in the first direction. This ensures that the distance between the first clamping plate 31 and the adjacent second clamping plate 32, as well as the distance between two adjacent second clamping plates 32, is approximately the same. This allows the battery to be positioned more accurately within the interval 33, and the distance between batteries in each pair of adjacent intervals 33 is approximately the same. This facilitates the crane's gripping of batteries within the interval 33, thereby improving battery production efficiency.

[0039] Furthermore, the transmission unit 51 is used to ensure that each interval 33 has the same size along the first direction when the push plate 2 moves away from the baffle 1 along the first direction. This means that when the drive member 4 drives the push plate 2 to slide away from the baffle 1 along the first direction to any position, the size of each interval 33 along the first direction is the same. That is, when the push plate 2 slides away from the baffle 1 along the first direction to any position, it can drive the first clamping plate 31 and multiple second clamping plates 32 to slide away from the baffle 1 along the first direction by a certain distance. This allows the interval 33 to be adjusted according to the different thicknesses of the batteries to accommodate batteries of different thicknesses. This effectively avoids the large difference in spacing between batteries in each adjacent interval 33 due to the thinner battery and the larger interval 33, thus improving the practicality of the formation fixture 10. At the same time, it also makes the position of the battery in the interval 33 more accurate, which in turn allows the crane to grasp the battery in the interval 33 more accurately, which is conducive to improving the battery production efficiency.

[0040] Furthermore, the first clamping plate 31, the second clamping plate 32, and adjacent second clamping plates 32 are connected to each other via transmission units 51. Specifically, each first clamping plate 31 and each second clamping plate 32 is connected to a transmission unit 51, and each second clamping plate 32 is connected to a transmission unit 51 located on an adjacent second clamping plate 32 or a first clamping plate 31 via multiple transmission units 51. Since each second clamping plate 32 is connected to a transmission unit 51 located on an adjacent second clamping plate 32 or a first clamping plate 31 via multiple transmission units 51, the connections between the transmission units 51 located on two adjacent second clamping plates 32 or on a second clamping plate 32 and an adjacent first clamping plate 31 are multiple, resulting in a more stable connection and thus ensuring more stable sliding of the first clamping plate 31 and the multiple second clamping plates 32.

[0041] In this embodiment, the baffle 1 is fixed to the base. The baffle 1 can be fixed to the base by bolts, welded to the base, or snapped onto the base. This embodiment does not limit this.

[0042] Furthermore, the sliding of the push plate 2 along the first direction to drive the first clamping plate 31 and multiple second clamping plates 32 to slide along the first direction can be implemented in several ways. In a first possible implementation, the push plate 2 can be fixedly connected to the first clamping plate 31, and the multiple second clamping plates 32 are located between the first clamping plate 31 and the baffle 1, so that when the push plate 2 slides along the first direction under the drive of the drive member 4, it drives the first clamping plate 31 to slide, and the first clamping plate 31 pushes the second clamping plates 32 or drives the second clamping plates 32 to slide through the transmission unit 51. In another possible implementation, the multiple second clamping plates 32 are located between the first clamping plate 31 and the baffle 1, and the push plate 2 is fixedly connected to the transmission unit 51 disposed on the first clamping plate 31, so that when the drive member 4 drives the push plate 2 to slide along the first direction, the push plate 2 can drive the transmission unit 51 on the first clamping plate 31 to slide, thereby driving the first clamping plate 31 and multiple second clamping plates 32 to slide.

[0043] The aforementioned driving component 4 can be any of an electric cylinder, hydraulic cylinder, pneumatic cylinder, etc., and this embodiment does not limit it.

[0044] In addition, this formation fixture can clamp and fix any of solid-state batteries, lithium-ion batteries, and pouch batteries to improve the formation quality of the batteries.

[0045] Figure 5 This is a schematic diagram of a gear, rack, and clamp assembly assembly provided in an embodiment of this application. Figure 6 This is a schematic diagram of a combination of a gear, a rack, a first clamping plate, and part of a second clamping plate provided in an embodiment of this application.

[0046] The aforementioned transmission unit 51 can be implemented in various ways. For a first implementation of the transmission unit 51, please refer to... Figures 3-6 As shown, multiple second clamping plates 32 are located between the first clamping plate 31 and the baffle 1. The transmission unit 51 includes a rack 511 and a gear 512. The first clamping plate 31 is fixedly connected to a rack 511. Each second clamping plate 32 is fixedly connected to a rack 511 and rotatably connected to a gear 512. The rack 511 extends along a first direction. Each gear 512 meshes with the rack 511 on the adjacent second clamping plates 32. The rack 511 on the first clamping plate 31 meshes with the gear 512 on the adjacent second clamping plate 32.

[0047] Therefore, by meshing the rack 511 with the gear 512, when the first clamping plate 31 slides away from the baffle 1 along the first direction under the drive of the push plate 2, multiple second clamping plates 32 can slide away from the baffle 1 by the same distance along the first direction in sequence. This makes the size of the interval 33 between the first clamping plate 31 and the second clamping plate 32 and the size of the interval 33 between each two adjacent second clamping plates 32 along the first direction approximately the same, and makes the movement of multiple second clamping plates 32 have high precision. This results in good consistency of the size of multiple intervals 33 along the first direction, which makes the position of the battery located in the multiple intervals 33 more accurate and more conducive to the crane gripping the battery in the formation fixture 10.

[0048] It should be noted that the above-mentioned gear 512 meshing with the rack 511 on the adjacent second clamping plates 32 on both sides means that the gear 512 meshes with the rack 511 on the adjacent second clamping plates 32 on both sides along the first direction.

[0049] For example, along the direction from the push plate 2 to the baffle 1, the multiple second clamping plates 32, racks 511, and gears 512 are numbered according to the following rules, with the numbering logic based on the first clamping plate 31: among the multiple second clamping plates 32, the one adjacent to the first clamping plate 31 is the first second clamping plate 32, and the rest are numbered in order of distance from the first clamping plate 31, such as the second clamping plate, the third clamping plate, and so on; the rack 511 located on the first clamping plate 31 is the first rack 511, and the rest are numbered in order of distance from the first clamping plate 31, such as the second rack 511, the third rack 511, and so on; the gear 512 rotatably connected to the first second clamping plate 32 is the first gear 512, and the rest are numbered in order of distance from the first clamping plate 31, such as the second gear 512, the third gear 512, and so on.

[0050] When the push plate 2 drives the first clamping plate 31 to slide away from the baffle 1 along the first direction, as Figure 5 and Figure 6As shown, the first rack 511, mounted on the first clamping plate 31, moves away from the baffle 1 along the first direction with the first clamping plate 31. The first gear 512, located on the first second clamping plate 32, rotates counterclockwise under the drive of the first rack 511, and simultaneously moves away from the baffle 1 along the first direction. The first gear 512 drives the first second clamping plate 32 to slide away from the baffle 1 along the first direction. The second rack 511 moves away from the baffle 1 along the first second clamping plate 32, and drives the second gear 512 to rotate counterclockwise, and simultaneously drives the second gear 512 to move away from the baffle 1 along the first direction. The second gear 512 drives the second second clamping plate 32 to slide away from the baffle 1 along the first direction. The second second clamping plate 32 drives... The third rack 511 moves away from the baffle 1 along the first direction, driving the third gear 512 to rotate clockwise and simultaneously moving it away from the baffle 1 along the first direction. The third gear 512 then slides the third second clamping plate 32 away from the baffle 1 along the first direction. The third second clamping plate 32 drives the fourth rack 511 on it to move away from the baffle 1 along the first direction. The fourth rack 511 then drives the fourth gear 512 to rotate clockwise and simultaneously move it away from the baffle 1 along the first direction. The fourth gear 512 then slides the fourth second clamping plate 32 away from the baffle 1 along the first direction, and so on, thus driving subsequent second clamping plates 32 to slide away from the baffle 1 along the first direction. It should be noted that the movement direction of the first clamping plate 31 and the second clamping plate 32 away from the baffle 1 along the first direction can be referenced... Figure 6 As indicated by arrow z1, the rack 511 mentioned above moves away from the baffle 1 along the first direction. Figure 6 As indicated by arrow z2, the gear 512 mentioned above moves away from the baffle 1 along the first direction. Figure 6 As indicated by arrow z3, and the rotation direction of gear 512, please refer to... Figure 6 As indicated by arrow z4 in the middle.

[0051] In addition, the rack 511 connected to the first clamping plate 31 can be fixedly set relative to the push plate 2. For example, the push plate 2 can be fixedly connected to the first clamping plate 31, or the push plate 2 can be fixedly connected to the rack 511 connected to the first clamping plate 31, or the push plate 2 can be fixedly connected to both the first clamping plate 31 and the rack 511 connected to the first clamping plate 31. This embodiment does not limit this, and all of the above can drive the first clamping plate 31 and the rack 511 connected to the first clamping plate 31 to move in the first direction when the driving member 4 drives the push plate 2 to slide in the first direction.

[0052] The push plate 2 described above may be provided with a clearance groove, which is correspondingly provided with the rack 511 adjacent to the push plate 2. The clearance groove is used to avoid the rack 511 adjacent to the push plate 2. It can be understood that the rack 511 adjacent to the push plate 2 refers to the rack 511 connected to the first clamping plate 31 and the rack 511 connected to the second clamping plate 32 adjacent to the first clamping plate 31.

[0053] Alternatively, a clearance groove may be provided on the baffle 1, which corresponds to the rack 511 adjacent to the push plate 2. The clearance groove is used to avoid the rack 511 adjacent to the push plate 2. It can be understood that the rack 511 adjacent to the push plate 2 refers to the rack 511 connected to the second clamping plate 32 adjacent to the baffle 1.

[0054] Optionally, such as Figure 6 As shown, among the two gears 512 meshing with the same rack 511, the distance between the rotation center axis of one of the two gears 512 and the second clamping plate 32 correspondingly connected to the rack 511 is the first distance (as shown in a1 in the figure), and the distance between the rotation center axis of the other gear 512 and the second clamping plate 32 correspondingly connected to the rack 511 is the second distance (as shown in a2 in the figure). The second distance is equal to the first distance.

[0055] It should be noted that the above statement that the second spacing is equal to the first spacing means that the first spacing and the second spacing are approximately the same, not that the first spacing and the second spacing are necessarily the same.

[0056] Therefore, the maximum dimension of the distance between each two adjacent second clamping plates 32 and the maximum dimension of the interval 33 between the second clamping plate 32 and the adjacent first clamping plate 31 along the first direction can be the same. When the first clamping plate 31 moves away from the baffle 1 along the first direction to the maximum position under the drive of the push plate 2, the dimension of each interval 33 along the first direction can still be approximately the same, so that the final thickness of the battery that each interval 33 can be used for is the same, and the position of the thicker battery located in the formation fixture 10 can also be more accurate.

[0057] When the centerline of the rack 511 in the length direction and the centerline of the corresponding second clamping plate 32 in the thickness direction are located in the same plane parallel to the second clamping plate 32, the two gears 512 can be symmetrical about the centerline of the thickness direction of the second clamping plate 32 on the rack 511, which facilitates the assembly of the rack 511 with the two meshing gears 512.

[0058] Optionally, such as Figure 5 and Figure 6As shown, the plurality of second clamping plates 32 include a plurality of even-numbered rows of second clamping plates and a plurality of odd-numbered rows of second clamping plates. The plurality of odd-numbered rows of second clamping plates and the plurality of even-numbered rows of second clamping plates are arranged alternately along a first direction. The even-numbered rows of second clamping plates are the second clamping plates 32 located in the even-numbered column along the direction from the first clamping plate 31 to the baffle 1, and the odd-numbered rows of second clamping plates are the second clamping plates 32 located in the odd-numbered column along the direction from the first clamping plate 31 to the baffle 1. The rotation center axes of the gears 512 rotatably connected to the odd-numbered rows of second clamping plates are all located in the same first plane perpendicular to the second clamping plates 32. The rotation center axes of the gears 512 rotatably connected to the even-numbered rows of second clamping plates are all located in the same second plane perpendicular to the second clamping plates 32. The second plane and the first plane are two non-coincident planes.

[0059] Therefore, it is less likely that there will be interference between the rack 511 that meshes with the gear 512 on the even-numbered second clamping plate and the rack 511 that meshes with the gear 512 on the odd-numbered second clamping plate, so that the length of the rack 511 can be set according to the requirements, thereby making the interval 33 in the forming fixture 10 suitable for batteries of different thicknesses.

[0060] In addition, such as Figure 5 and Figure 6 As shown, two racks 511 that mesh with the same gear 512 are located on opposite sides of the gear 512 in a direction parallel to the second clamping plate 32.

[0061] Therefore, the movement of the two racks 511 meshing with the same gear 512 along the first direction will not interfere with each other, which facilitates the assembly between the same gear 512 and the two meshing racks 511. The two racks 511 mesh with the gear 512 from opposite sides, forming a bidirectional constraint, which effectively counteracts the radial force generated during the rotation of the gear 512, making the movement of the racks 511 along the first direction more stable, thereby making the sliding of the multiple second clamps 32 more stable.

[0062] like Figure 5 and Figure 6 As shown, four racks 511 that mesh with the two adjacent gears 512 are arranged in a direction parallel to the second clamping plate 32.

[0063] This effectively avoids interference between the four adjacent racks 511 during their movement along the first direction, thus allowing the spacing 33 between the first clamping plate 31 and the adjacent second clamping plate 32, as well as the spacing 33 between two adjacent second clamping plates 32, to be smaller along the first direction. This enables pressure to be applied even to batteries with smaller thicknesses, effectively improving the applicability of the formation fixture 10.

[0064] In some embodiments, such as Figure 6 As shown, the rack 511 has a first end 5111 and a second end 5112 opposite to each other along a first direction. The distance between the first end 5111 and the second clamping plate 32 connected to the rack 511 is the third distance (as shown in b1 in the figure). The distance between the second end 5112 and the second clamping plate 32 connected to the rack 511 is the fourth distance (as shown in b2 in the figure). The fourth distance is equal to the third distance.

[0065] Therefore, when the rack 511 meshes with the two gears 512, the force on both ends of the rack 511 can be more balanced, avoiding tilting or deformation due to uneven force on the rack 511, which helps to improve the smoothness of the rack 511's movement, thus making the sliding of the multiple second clamping plates 32 more stable; and the rack 511 can be symmetrically arranged on the second clamping plates 32, so that the rack 511 can be easily assembled on the corresponding second clamping plates 32 without complicated measurement or adjustment.

[0066] When the two gears 512 meshing with the rack 511 are symmetrically arranged about the center line of the rack 511 in the length direction, the size of the interval 33 between each two adjacent second clamping plates 32 in the first direction is the same. During the movement of multiple second clamping plates 32, the movement distance of each second clamping plate 32 in the first direction is the same, so that the position of the battery in the interval 33 is more accurate and it is more conducive to the crane to grab the battery in the interval 33.

[0067] In other embodiments, limit structures are provided at both ends of the rack 511, which are used to restrict the gear 512 from disengaging from the meshing rack 511.

[0068] Therefore, it can effectively prevent the gear 512 from disengaging from the rack 511 when the push plate 2 is driven by the drive component 4 to slide away from the baffle 1 in the first direction, thereby improving the stability of the first clamping plate 31 and the multiple second clamping plates 32 sliding in the first direction. At the same time, it can also limit the sliding of the second clamping plate 32 in the first direction away from the baffle 1, thereby limiting the sliding of the push plate 2 in the first direction away from the baffle 1.

[0069] The limiting structure can be implemented in several ways. In one possible implementation, the limiting structure may include a limiting block, which protrudes from the surface of the rack 511 in a direction parallel to the second clamping plate 32. This structure is simple and easy to implement. In another possible implementation, the limiting structure may include a stud, which can be threaded onto the rack 511, making installation convenient and quick.

[0070] Figure 7This is a schematic diagram of the structure of the first combination of the first link, the second link, the first clamping plate and part of the second clamping plate provided in the embodiments of this application.

[0071] The aforementioned plurality of second clamping plates 32 are located between the first clamping plate 31 and the baffle 1. The plurality of second clamping plates 32 includes a plurality of even-numbered rows of second clamping plates and a plurality of odd-numbered rows of second clamping plates, which are arranged alternately along a first direction. In the second implementation of the transmission unit 51, the transmission unit 51 may include a scissor mechanism, such as... Figure 7 As shown, the transmission unit 51 may include a first connecting rod 513 and a second connecting rod 514. The middle parts of the first connecting rod 513 and the middle parts of the second connecting rod 514 are hinged to each other via a hinge shaft. Each odd-numbered row of second clamping plates is rotatably connected to the hinge shaft. The end of the first connecting rod 513 is hinged to the end of the second connecting rod 514 of the adjacent transmission unit 51, and the end of the second connecting rod 514 is hinged to the end of the first connecting rod 513 of the adjacent transmission unit 51. The ends of the first connecting rod 513 and the second connecting rod 514 are slidably connected to the corresponding even-numbered row of second clamping plates, and the sliding direction of the ends of the first connecting rod 513 and the second connecting rod 514 is along the height direction of the even-numbered row of second clamping plates (e.g., ...). Figure 7 direction shown in y).

[0072] Therefore, when the first clamping plate 31 and the second clamping plate 32 slide away from the baffle 1 along the first direction, the load can be distributed to the first connecting rod 513, the second connecting rod 514 and the hinge shaft, effectively avoiding the situation of force concentration. This makes the movement of the transmission unit 51 more stable, and thus makes the sliding smoothness of the first clamping plate 31 and the multiple second clamping plates 32 along the first direction better.

[0073] Furthermore, the middle parts of the first link 513 and the second link 514 are hinged to each other via a hinge shaft, and each odd-numbered row of second clamping plates is rotatably connected to the hinge shaft. That is, the hinge between the first link 513 and the second link 514, as well as the rotatable connection between the entire first link 513 and the second link 514 and the odd-numbered row of second clamping plates, are achieved by sharing a hinge shaft, which simplifies the structure of the transmission unit 51, reduces the manufacturing difficulty of the transmission unit 51, and is conducive to cost control.

[0074] The length of the first link 513 can be the same as the length of the second link 514, so that their positions can be interchanged when assembling the first link 513 and the second link 514, which facilitates assembly.

[0075] Furthermore, the cross-sectional shape of the first link 513 can be any of the following: circular, rectangular, elliptical, etc., and this embodiment does not limit this. The cross-sectional shape of the second link 514 can be approximately the same as that of the first link 513, and will not be described in detail here.

[0076] It is understood that the middle part of the first link 513 can be the portion located in the middle of the first link 513 along its extension direction, or it can be the portion of the first link 513 located between its two ends; no limitation is made here. Similarly, the middle part of the second link 514 can be the portion located in the middle of the second link 514 along its extension direction; no limitation is made here either.

[0077] Optionally, such as Figure 7 As shown, the side of the second clamping plate in the odd-numbered row has a first connection point (such as...). Figure 7 (The area shown in the dashed box c) The first connection is located in the middle area of ​​the side along the first direction. The transmission unit 51 is rotatably connected to the first connection of the corresponding odd-numbered row of second clamping plates via the hinge shaft. The portions of the first link 513 located on both sides of the hinge shaft and the portions of the second link 514 located on both sides of the hinge shaft are symmetrical about the center of the hinge shaft.

[0078] Therefore, when the first link 513 and the second link 514 rotate around the hinge axis, the rotation path of the portion of the first link 513 located on both sides of the hinge axis can be symmetrical about the hinge axis center. This allows the second clamping plate 32 to move linearly along the first direction with a consistent rhythm and good synchronization, thus making the sliding of multiple second clamping plates 32 along the first direction smoother. Furthermore, the driving force transmitted by the first link 513 and the second link 514 can be evenly distributed around the hinge axis, effectively preventing deformation or breakage of the first link 513 or the second link 514 due to concentrated force, thereby extending the service life of the transmission unit 51.

[0079] In addition, when assembling the first link 513, the second link 514 and the second clamping plate 32, it is only necessary to ensure that the length and position of the first link 513 and the second link 514 are symmetrical on both sides of the hinge axis, which reduces the assembly difficulty.

[0080] The length of the first link 513 can be the same as the length of the second link 514, so that the length of the part of the first link 513 located on both sides of the hinge axis can be the same as the length of the part of the second link 514 located on both sides of the hinge axis. This eliminates the need to distinguish between the first link 513 and the second link 514 during installation, further reducing assembly difficulty and helping to control costs.

[0081] Optionally, such as Figure 7As shown, the even-numbered row of second clamping plates has a connecting surface facing the distance control component 5. A sliding groove 61 is provided on the connecting surface. The sliding groove 61 extends along the height direction of the even-numbered row of second clamping plates. Slider blocks are provided at both ends of the first connecting rod 513 and / or at both ends of the second connecting rod 514. The sliders are slidably disposed in the sliding groove 61.

[0082] Therefore, through the cooperation of the slider and the slide groove 61, the two ends of the first link 513 and / or the two ends of the second link 514 can slide along the extension direction of the slide groove 61, effectively preventing the two ends of the first link 513 and / or the two ends of the second link 514 from becoming skewed during the sliding process, thereby making the sliding of the odd-numbered row of second clamping plates along the first direction more stable.

[0083] In this embodiment, sliders are provided at both ends of the first link 513, or sliders are provided at both ends of the second link 514, or sliders are provided at both ends of the first link 513 and both ends of the second link 514. This embodiment does not limit this.

[0084] In addition, the slider and the first connecting rod 513 can be hinged by a pivot, and the slider and the second connecting rod 514 can also be hinged by a pivot, so that the sliding of the slider along the slide groove 61 is not easily affected by the rotation of the first connecting rod 513 and the second connecting rod 514.

[0085] Optionally, a ball bearing can be provided between the slider and the groove 61 to reduce the frictional resistance between the slider and the groove 61, thereby effectively improving the smoothness of the slider sliding in the groove 61.

[0086] In addition, the slide groove 61 can be implemented in various ways on the connecting surface. In one possible implementation, the slide groove 61 can be provided on the connecting surface, extending along the height direction of the even-numbered row of the second clamping plates.

[0087] In another possible implementation, such as Figure 7 As shown, a mounting component 6 can be provided on the connecting surface, and a sliding groove 61 is provided on the mounting component 6. Therefore, the structural strength of the even-numbered rows of second clamping plates is less likely to be affected by the sliding groove 61.

[0088] The connection between the mounting component 6 and the connecting surface can also be implemented in various ways. For example, the mounting component 6 can be threaded onto the connecting surface, or it can be glued to the connecting surface, or it can be welded to the connecting surface. This embodiment does not limit this.

[0089] In addition, the mounting component 6 can be a mounting column or a mounting block, and this embodiment does not limit it.

[0090] Optionally, such as Figure 7As shown, in the first connecting rod 513 and the second connecting rod 514 disposed on the second clamping plate 32 adjacent to the first clamping plate 31, the end of the first connecting rod 513 near the first clamping plate 31 is slidably connected to the first clamping plate 31 along the height direction of the even-numbered rows of the second clamping plates. The end of the second connecting rod 514 near the first clamping plate 31 is also slidably connected to the first clamping plate 31 along the height direction of the even-numbered rows of the second clamping plates. The implementation method of the sliding connection between the first connecting rod 513 and the first clamping plate 31 is roughly the same as the implementation method of the sliding connection between the first connecting rod 513 and the second clamping plate 32. The implementation method of the sliding connection between the second connecting rod 514 and the first clamping plate 31 is roughly the same as the implementation method of the sliding connection between the second connecting rod 514 and the second clamping plate 32. For details, please refer to the above, and it will not be repeated here.

[0091] Figure 8 This is a schematic diagram of the structure of the second combination of the first link, the second link, the first clamping plate, and part of the second clamping plate provided in the embodiments of this application.

[0092] In other embodiments, when the transmission unit 51 includes a scissor mechanism, the connection between the scissor mechanism and the first clamping plate 31 and the second clamping plate 32 can also be as follows: Figure 8 As shown, multiple second clamping plates 32 are located between the first clamping plate 31 and the baffle 1. The transmission unit 51 also includes a first connecting rod 513 and a second connecting rod 514. The middle part of the first connecting rod 513 and the middle part of the second connecting rod 514 are hinged to each other through a hinge shaft. The first clamping plate 31 and each second clamping plate 32 are rotatably connected to the corresponding transmission unit 51 through a hinge shaft. The end of the first connecting rod 513 is hinged to the end of the second connecting rod 514 of the adjacent transmission unit 51, and the end of the second connecting rod 514 is hinged to the end of the first connecting rod 513 of the adjacent transmission unit 51.

[0093] This allows for shorter lengths of the first link 513 and the second link 514, making them less prone to twisting, bending, or other deformations when under pressure, thus effectively improving the smoothness of the transmission unit 51's motion.

[0094] The position on the first clamping plate 31 that is rotatably connected to the first connecting rod 513 and the second connecting rod 514 via the hinge shaft is approximately the same as the position on the odd-numbered row of second clamping plates that is rotatably connected to the first connecting rod 513 and the second connecting rod 514 via the hinge shaft. That is, it is located in the middle area of ​​the side of the first clamping plate 31 along the first direction, and the portions of the first connecting rod 513 rotatably connected to the first clamping plate 31 located on both sides of the hinge shaft and the portions of the second connecting rod 514 located on both sides of the hinge shaft are symmetrical about the center of the hinge shaft.

[0095] The position on the second clamping plate 32 that is rotatably connected to the first connecting rod 513 and the second connecting rod 514 via the hinge shaft is roughly the same as the position on the odd-numbered row of second clamping plates that are rotatably connected to the first connecting rod 513 and the second connecting rod 514 via the hinge shaft, as described above. For details, please refer to the above description, which will not be repeated here.

[0096] This application also provides a battery formation apparatus, including the formation fixture 10 described in any of the above embodiments.

[0097] The formation fixture 10 in the battery formation equipment is the formation fixture 10 described in any of the above embodiments. Therefore, the structure of the formation fixture 10 in the battery formation equipment 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 descriptions.

[0098] 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; Baffle (1), the baffle (1) is fixed to the base; Push plate (2), the push plate (2) and the baffle (1) are arranged opposite to each other in a first direction and are slidably arranged on the base; The clamping plate assembly (3) includes a first clamping plate (31) and a plurality of second clamping plates (32) arranged along the first direction. The first clamping plate (31) and the plurality of second clamping plates (32) are slidably disposed between the baffle (1) and the push plate (2). There is a gap (33) between the first clamping plate (31) and the adjacent second clamping plate (32) and between two adjacent second clamping plates (32). The gap (33) is used to accommodate the battery to be formed. The driving component (4) is connected to the push plate (2) at its driving end, and is used to drive the push plate (2) to slide along the first direction so as to drive the first clamping plate (31) and a plurality of second clamping plates (32) to slide along the first direction. The distance control assembly (5) includes a transmission unit (51). The first clamping plate (31) and the second clamping plate (32) and the adjacent second clamping plate (32) are respectively connected through the transmission unit (51). The transmission unit (51) is used to make each of the intervals (33) have the same size in the first direction when the push plate (2) slides away from the baffle (1) in the first direction.

2. The chemical formation fixture (10) according to claim 1, characterized in that, Multiple second clamping plates (32) are located between the first clamping plate (31) and the baffle (1). The transmission unit (51) includes a rack (511) and a gear (512). The first clamping plate (31) is fixedly connected to one of the racks (511). Each second clamping plate (32) is fixedly connected to one of the racks (511) and rotatably connected to one of the gears (512). The rack (511) extends along the first direction. Each gear (512) meshes with the racks (511) on the adjacent second clamping plates (32). The rack (511) on the first clamping plate (31) meshes with the gear (512) on the adjacent second clamping plate (32).

3. The chemical formation fixture (10) according to claim 2, characterized in that, The plurality of second clamps (32) include a plurality of even-numbered rows of second clamps and a plurality of odd-numbered rows of second clamps. The plurality of odd-numbered rows of second clamps and the plurality of even-numbered rows of second clamps are arranged alternately along the first direction. The even-numbered rows of second clamps are the second clamps (32) located in the even-numbered columns along the direction from the first clamp (31) to the baffle (1). The odd-numbered rows of second clamps are the second clamps (32) located in the odd-numbered columns along the direction from the first clamp (31) to the baffle (1). The rotation center axes of the gears (512) that are rotatably connected to the second clamping plates of the odd-numbered rows are all located in the same first plane perpendicular to the second clamping plates (32); The rotation center axes of the gears (512) rotatably connected to the second clamping plates of the even-numbered rows are all located in the same second plane perpendicular to the second clamping plates (32), and the second plane and the first plane are two non-coincident planes; Located on opposite sides of the gear (512) in a direction parallel to the second clamping plate (32).

4. The chemical formation fixture (10) according to claim 3, characterized in that, The four racks (511) that mesh with the two adjacent gears (512) are arranged in a direction parallel to the second clamp (32).

5. The chemical formation fixture (10) according to any one of claims 2-4, characterized in that, Limiting structures are provided at both ends of the rack (511), and the limiting structures are used to restrict the gear (512) from disengaging from the meshing rack (511).

6. The chemical formation fixture (10) according to claim 1, characterized in that, A plurality of second clamping plates (32) are located between the first clamping plate (31) and the baffle (1). The plurality of second clamping plates (32) include a plurality of even-numbered rows of second clamping plates and a plurality of odd-numbered rows of second clamping plates. The plurality of odd-numbered rows of second clamping plates and the plurality of even-numbered rows of second clamping plates are arranged alternately along the first direction. The even-numbered rows of second clamping plates are the second clamping plates (32) located in the even-numbered columns along the direction from the first clamping plate (31) to the baffle (1). The odd-numbered rows of second clamping plates are the second clamping plates (32) located in the odd-numbered columns along the direction from the first clamping plate (31) to the baffle (1). The transmission unit (51) further includes a first connecting rod (513) and a second connecting rod (514). The middle part of the first connecting rod (513) and the middle part of the second connecting rod (514) are hinged to each other by a hinge shaft. Each of the odd-numbered rows of second clamping plates is rotatably connected to the hinge shaft. The end of the first connecting rod (513) is hinged to the end of the second connecting rod (514) of the adjacent transmission unit (51), and the end of the second connecting rod (514) is hinged to the end of the first connecting rod (513) of the adjacent transmission unit (51). Wherein, the ends of the first link (513) and the second link (514) are slidably connected to the corresponding even-numbered row of second clamping plates, and the sliding direction of the ends of the first link (513) and the second link (514) is along the height direction of the even-numbered row of second clamping plates.

7. The chemical formation fixture (10) according to claim 6, characterized in that, The side of the odd-numbered row of second clamping plates has a first connection point, which is located in the middle region of the side along the first direction. The transmission unit (51) is rotatably connected to the first connection point of the corresponding odd-numbered row of second clamping plates through the hinge shaft. The portions of the first connecting rod (513) located on both sides of the hinge shaft and the portions of the second connecting rod (514) located on both sides of the hinge shaft are symmetrical about the center of the hinge shaft.

8. The chemical formation fixture (10) according to claim 6 or 7, characterized in that, The even-numbered row of the second clamping plate has a connecting surface facing the distance control component (5), and a sliding groove (61) is provided on the connecting surface. The sliding groove (61) extends along the height direction of the even-numbered row of the second clamping plate. The two ends of the first connecting rod (513) and / or the two ends of the second connecting rod (514) are respectively provided with sliders, and the sliders are slidably disposed in the sliding groove (61).

9. The chemical formation fixture (10) according to claim 1, characterized in that, Multiple second clamping plates (32) are located between the first clamping plate (31) and the baffle (1). The transmission unit (51) also includes a first connecting rod (513) and a second connecting rod (514). The middle part of the first connecting rod (513) and the middle part of the second connecting rod (514) are hinged to each other through a hinge shaft. The first clamping plate (31) and each second clamping plate (32) are rotatably connected to the corresponding transmission unit (51) through the hinge shaft. The end of the first connecting rod (513) is hinged to the end of the second connecting rod (514) of the adjacent transmission unit (51), and the end of the second connecting rod (514) is hinged to the end of the first connecting rod (513) of the adjacent transmission unit (51).

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

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