Clamp and isostatic pressing device

Abstract

The utility model relates to the technical field of batteries, and discloses a clamp and an isostatic pressing device. The clamp comprises a clamping assembly and a protection assembly, the clamping assembly comprises at least two clamping plates which are arranged in a stacked mode, an electrode assembly is clamped between every two adjacent clamping plates, the protection assembly is arranged between the two clamping plates, and the protection assembly is arranged to be capable of preventing a tab of the electrode assembly from being subjected to pressure in the stacking direction of the clamping assembly. The clamping assembly is used for clamping the electrode assembly, and the electrode assembly is arranged between the two adjacent clamping plates, so that the electrode assembly can be effectively fixed, and the structural stability of the electrode assembly is enhanced; the protection assembly protects the tabs of the electrode assembly, so that when the electrode assembly is pressed, the protection assembly can prevent the tabs from being broken due to the pressure in the stacking direction of the clamping assembly and the shearing force of the edge of the solid electrolyte in the electrode assembly.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a clamp and an isostatic pressing device. Background Technology

[0002] Power batteries are widely used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, as well as in electric vehicles and other electric transportation vehicles. Solid-state batteries, due to their advantages such as high energy density, excellent cycle characteristics, and high safety features, have become one of the future development trends of power batteries.

[0003] To improve the densification performance of solid-state batteries, isostatic pressing is applied. Positive and negative electrode sheets, along with a solid electrolyte sandwiched between them, are wound or stacked to form an electrode assembly. This assembly is then placed under isostatic pressure, and a pressurization system is used to gradually increase the pressure, applying equal pressure to all surfaces of the electrode assembly to achieve densification.

[0004] However, there is no electrolyte at the tabs of solid-state battery electrode components. Therefore, there are gaps between adjacent tabs along the stacking direction of the electrode components. When the entire electrode components are subjected to isostatic pressing, the tabs are prone to breakage under pressure, and the tabs are also prone to breakage due to the shear force of the solid electrolyte edge. Utility Model Content

[0005] The purpose of this invention is to overcome the problem that the tabs of the electrode assembly break under pressure and shear force at the edge of the solid electrolyte during isostatic pressing of the electrode assembly in the prior art, and to provide a clamp and isostatic pressing device. The clamp has the technical effect of effectively protecting the tabs of the electrode assembly.

[0006] To achieve the above objectives, the present invention provides a clamp, comprising: a clamping assembly including at least two stacked clamping plates, wherein adjacent clamping plates are used to clamp an electrode assembly; and a protective assembly configured to prevent the tabs of the electrode assembly from being subjected to pressure along the stacking direction of the clamping assembly.

[0007] Preferably, the protective component is made of a flexible material and has a protective portion configured to isolate the tab from the clamping component to prevent the tab from being subjected to pressure along the stacking direction of the clamping component.

[0008] Preferably, the protective portion is an opening extending through the protective component along the stacking direction of the clamping component, and when the electrode assembly is disposed within the clamping component, the opening is located above the electrode tab; or the protective portion is a groove that can accommodate the electrode tab.

[0009] Preferably, the two adjacent clamping plates are respectively: an upper clamping plate, the upper clamping plate being provided with a first protrusion; and a lower clamping plate, the lower clamping plate being provided with a first groove that cooperates with the first protrusion, the electrode assembly being able to be accommodated in the accommodating space formed between the first protrusion and the first groove; and / or the clamp includes a positioning part, the positioning part being used to fix the relative position between the two adjacent clamping plates.

[0010] Preferably, the upper clamping plate is further provided with a second protrusion surrounding the first protrusion, the height of the first protrusion being greater than the height of the second protrusion; the lower clamping plate is further provided with a second groove surrounding the first groove, and the depth of the second groove being greater than the depth of the first groove; the protective component includes: an upper protective member, the protective part being disposed on the upper protective member, the upper protective member being disposed on the second protrusion; and a lower protective member, the lower protective member being embedded in the second groove.

[0011] Preferably, the second groove includes: a transverse groove disposed on one side of the first groove; and two vertical grooves disposed at intervals on both sides of the first groove along the extending direction of the transverse groove; and / or the second protrusion includes: a transverse protrusion disposed on one side of the first protrusion; and two vertical protrusions disposed at intervals on both sides of the first protrusion along the extending direction of the transverse protrusion.

[0012] Preferably, the clamp further includes an adjustment component for adjusting the relative distance between the at least two clamping plates.

[0013] Preferably, the adjusting assembly includes: an adjusting rod, one end of which is fixed to the bottom of the at least two clamping plates, and the other end of which extends upward and passes through the at least two clamping plates in sequence; and an adjusting nut, which is threadedly connected to the portion of the adjusting rod located above the at least two clamping plates.

[0014] Preferably, the adjusting assembly further includes an elastic element, which is sleeved outside the adjusting rod and compressed between the adjusting nut and the top of the at least two clamping plates.

[0015] The second aspect of this utility model provides an isostatic pressing device, which includes the clamp described in any of the above-described embodiments.

[0016] Through the above technical solution, the clamping assembly is used to clamp the electrode assembly, placing the electrode assembly between two adjacent clamping plates, which can effectively fix the electrode assembly and enhance the stability of the electrode assembly structure; the protection assembly protects the tabs of the electrode assembly, so that when the electrode assembly is subjected to pressure, the protection assembly can not only prevent the tabs from being subjected to pressure along the stacking direction of the clamping assembly, but also prevent the tabs from being subjected to shear force from the edge of the solid electrolyte inside the electrode assembly, thereby preventing the tabs from breaking, ensuring the integrity of the electrode assembly, improving the safety of the electrode assembly and the pass rate of composite, and reducing production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of one embodiment of the clamp provided according to the present disclosure.

[0018] Figure 2 This is a partial structural schematic diagram of the fixture provided according to an embodiment of the present disclosure;

[0019] Figure 3 This is a schematic diagram of the structure of the upper protective member of the clamp provided according to an embodiment of the present disclosure;

[0020] Figure 4 This is a schematic diagram of the structure of the lower clamping plate of the fixture provided according to an embodiment of the present disclosure;

[0021] Figure 5 This is a schematic diagram of the upper clamping plate of the fixture provided according to an embodiment of the present disclosure;

[0022] Figure 6 This is a schematic diagram of another embodiment of the clamp provided according to the present disclosure.

[0023] Figure 7 yes Figure 6 A schematic diagram of the structure of the clamping plate located between the upper and lower clamping plates; and

[0024] Figure 8 This is a schematic diagram of the battery assembly.

[0025] Explanation of reference numerals in the attached figures

[0026] 1. Clamping assembly; 11. Upper clamping plate; 12. First protrusion; 13. Second protrusion; 131. Lateral protrusion; 132. Vertical protrusion; 14. Lower clamping plate; 15. First groove; 16. Second groove; 161. Lateral groove; 162. Vertical groove; 2. Protective assembly; 21. Upper protective member; 22. Protective part; 23. Lower protective member; 3. Positioning post; 4. Adjusting assembly; 41. Adjusting rod; 42. Adjusting nut; 43. Elastic member; 44. Washer; 5. Electrode assembly; 51. Electrode tab; 52. Main body. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0028] In this invention, unless otherwise stated, directional terms such as "up" and "down" generally refer to up and down along the stacking direction of the clamping components.

[0029] This utility model provides a clamp, see [link] Figures 1 to 8 The device includes a clamping assembly 1 and a protective assembly 2. The clamping assembly 1 includes at least two stacked clamping plates, with the electrode assembly 5 clamped between two adjacent clamping plates. The protective assembly 2 is disposed between the two clamping plates and is configured to prevent the tabs 51 of the electrode assembly 5 from being subjected to pressure along the stacking direction of the clamping assembly 1. The clamping assembly 1 is used to clamp the electrode assembly 5, placing the electrode assembly 5 between two adjacent clamping plates. This effectively fixes the electrode assembly 5 and enhances the structural stability of the electrode assembly 5. The protection assembly 2 effectively protects the tabs 51 of the electrode assembly 5. When the electrode assembly 5 is subjected to pressure, the protection assembly 2 not only prevents the tabs 51 from being subjected to pressure along the stacking direction of the clamping assembly 1, but also prevents the tabs 51 from being subjected to shearing forces from the edges of the solid electrolyte inside the electrode assembly 5, thereby preventing the tabs 51 from breaking and ensuring the integrity of the electrode assembly 5. When the electrode assembly 5 is placed between the two clamping plates, the tabs 51 of the electrode assembly 5 are protected by the protection assembly 2, preventing the tabs 51 from breaking during the electrode assembly 5 composite process. This effectively protects the tabs 51, improves the safety of the electrode assembly 5 and the pass rate of composite, and reduces production costs.

[0030] The clamp of this embodiment is particularly suitable for clamping electrode assembly 5 in an isostatic pressing device.

[0031] The electrode assembly 5 is a laminate consisting of alternating layers of negative electrode, solid electrolyte and positive electrode. The positive electrode includes a positive current collector and a layer of positive active material on it. The negative electrode includes a negative current collector and a layer of negative active material on it. The active material portions of the negative electrode and the positive electrode constitute the main body 52 of the electrode assembly 5. The non-active material portions of the negative electrode and the positive electrode constitute the tab 51.

[0032] Preferably, see Figure 8 The tabs 51 are located at one end of the main body 52.

[0033] In one implementation, the clamping plate is made of steel plate with high yield strength. This design prevents the clamping plate from deforming during the electrode assembly 5 bonding process, ensuring the flatness of the electrode assembly 5 after bonding.

[0034] Preferably, the protective component 2 is made of a flexible material and has a protective part 22. The protective part 22 is configured to isolate the electrode tab 51 from the clamping component 1 to prevent the electrode tab 51 from being subjected to pressure along the stacking direction of the clamping component 1. By isolating the electrode tab 51 from the clamping component 1, the protective part 22 ensures that the electrode tab 51 does not directly contact the clamping component 1 during the clamping process, preventing the clamping force from being directly transmitted to the electrode tab 51 and avoiding pressure on the electrode tab. The flexible material protective component 2 can also buffer and protect the electrode tab 51 during the clamping process.

[0035] In one implementation, the protective component 2 is made of silicone, polyamide, rubber, thermoplastic polyurethane elastomer rubber (TPU), thermoplastic elastomer material (TPE), or soft polyvinyl chloride (PVC).

[0036] Preferably, the protective part 22 is an opening extending through the protective component 2 along the stacking direction of the clamping component 1. When the electrode component 5 is disposed in the clamping component 1, the opening is located above the tab 51. The opening can effectively isolate the tab 51 from the clamping component 1, preventing the tab 51 from being subjected to pressure; and the protective component 2 surrounding the opening can effectively seal the tab 51 at the opening, preventing external media from contacting the tab 51.

[0037] In one embodiment, the openings are two through holes that extend along the stacking direction of the clamping assembly 1. Along the stacking direction of the clamping assembly 1, the two through holes are located above the two tabs 51 of the electrode assembly 5.

[0038] In one embodiment, the opening is an elongated hole that extends along the stacking direction of the clamping assembly 1, and the elongated hole extends along the distribution direction of the two tabs 51 and is located above the tabs 51.

[0039] Preferably, the protective part 22 is a groove that can accommodate the tab 51. The groove can isolate the tab 51 from the clamping assembly 1, preventing the tab 51 from being subjected to pressure from the clamping assembly 1; and the protective assembly 2 surrounding the groove can effectively seal the tab 51, preventing external media from contacting the tab 51.

[0040] Preferably, see Figure 1The two adjacent clamping plates are an upper clamping plate 11 and a lower clamping plate 14. The upper clamping plate 11 is provided with a first protrusion 12; the lower clamping plate 14 is provided with a first groove 15 that mates with the first protrusion 12. The electrode assembly 5 can be accommodated in the accommodating space formed between the first protrusion 12 and the first groove 15. The relative mating of the first protrusion 12 and the first groove 15 can accommodate and clamp the electrode assembly 5 in the accommodating space formed by the first protrusion 12 and the first groove 15. This not only provides stable clamping of the electrode assembly 5, but also ensures the stability of the relative position of the upper clamping plate 11 and the lower clamping plate 14, thereby ensuring that the electrode assembly 5 is subjected to uniform force.

[0041] In one implementation, the shape of the bottom surface of the first groove 15 matches the shape of the electrode assembly 5.

[0042] As one implementation method, see Figure 6 and Figure 7 The clamping assembly 1 includes three clamping plates. Any two adjacent clamping plates clamp two electrode assemblies 5 along the stacking direction. The three clamping plates are an upper clamping plate 11, a middle clamping plate, and a lower clamping plate 14. A first groove 15 is provided on the upper part of the lower clamping plate 14, and a first protrusion 12 is provided on the lower part of the middle clamping plate 14 to engage with the first groove 15. The upper part of the middle clamping plate 11 has a first groove 15, and the lower part of the upper clamping plate 11 has a first protrusion 12 to engage with the first groove 15 of the middle clamping plate. The combined action of the three clamping plates achieves the clamping of the two electrode assemblies 5.

[0043] Preferably, see Figures 2 to 5The upper clamping plate 11 is also provided with a second protrusion 13 surrounding the first protrusion 12. The height of the first protrusion 12 is greater than the height of the second protrusion 13. The lower clamping plate 14 is also provided with a second groove 16 surrounding the first groove 15. The depth of the second groove 16 is greater than the depth of the first groove 15. The protective component 2 includes an upper protective member 21 and a lower protective member 23. The protective part 22 is disposed on the upper protective member 21. The upper protective member 21 is disposed on the second protrusion 13. The lower protective member 23 is embedded in the second groove 16. The first groove 15 and the first protrusion 12 can effectively clamp the electrode assembly 5. When the electrode assembly 5 is clamped, the upper protective member 21 and the lower protective member 23 surrounding the electrode assembly 5 can seal the area around the electrode assembly 5, preventing the medium in the isostatic pressure device from entering and pressurizing the electrode tab 51 of the electrode assembly 5, thus avoiding the electrode tab 51 from being broken due to force. The setting that the height of the first protrusion 12 is greater than the height of the second protrusion 13 and the depth of the second groove 16 is greater than the depth of the first groove 15 can prevent the upper protective member 21 and the lower protective member 23 from obstructing the clamping of the main body 52. ​​At the same time, the protective part 22 of the upper protective member 21 is located above the electrode tab 51, which can prevent the electrode tab 51 from being subjected to pressure along the stacking direction of the clamping assembly 1. The upper protective member 21 surrounding the protective part 22 can effectively seal the electrode tab 51, preventing the external medium from contacting the electrode tab 51.

[0044] The height of the first protrusion 12 and the height of the second protrusion 13 are both based on the end face of the upper clamping plate 11 away from the first protrusion 12.

[0045] The depth of the first groove 15 and the depth of the second groove 16 are both based on the end face of the second groove 16 of the lower clamping plate 14.

[0046] Preferably, the external medium is the medium in the isostatic pressure device, and the portion of the upper protective member 21 surrounding the protective part 22 can prevent the medium from contacting the electrode 51, thereby avoiding the electrode 51 from being subjected to the pressure of the medium.

[0047] As one implementation method, see Figure 3 To avoid stress damage to the tab 51, the junction between the upper protective member 21 and the tab 51 is chamfered.

[0048] In one embodiment, the upper protective member 21 is fixedly connected to the upper clamping plate 11.

[0049] In one implementation, the heights of the upper protective member 21 and the lower protective member 23 are adjusted according to the height of the electrode assembly 5.

[0050] In one implementation, along the stacking direction, the upper protective member 21 protrudes from the first protrusion 12, and the lower protective member 23 placed in the second groove 16 is higher than the height of the first groove 15. When the upper protective member 21 is stacked on top of the lower protective member 23, the upper protective member 21 and the lower protective member 23 deform, which not only achieves effective sealing around the first groove 15, but also ensures the clamping force of the electrode assembly 5.

[0051] Preferably, the second groove 16 includes a transverse groove 161 and two vertical grooves 162. The transverse groove 161 is disposed on one side of the first groove 15, and the two vertical grooves 162 are spaced apart on both sides of the first groove 15 along the extending direction of the transverse groove 161; and / or the second protrusion 13 includes a transverse protrusion 131 and two vertical protrusions 132. The transverse protrusion 131 is disposed on one side of the first protrusion 12; the two vertical protrusions 132 are spaced apart on both sides of the first protrusion 12 along the extending direction of the transverse protrusion 131. A portion of the lower protective member 23 placed in the transverse groove 161 is used to seal the tab 51 of the electrode assembly 5 with a portion of the upper protective member 21 at the transverse protrusion 131; another portion of the lower protective member 23 placed in the two vertical grooves 162 is used to stack with another portion of the upper protective member 21 of the two vertical protrusions 132 to seal the electrode assembly 5.

[0052] Preferably, the clamp includes a positioning part for fixing the relative position between two adjacent clamping plates. The positioning part can further improve the stability of the relative position between the upper clamping plate 11 and the lower clamping plate 14.

[0053] Preferably, the positioning part includes a positioning post 3, which can pass through the upper clamping plate 11 and the lower clamping plate 14 to fix the relative position between the upper clamping plate 11 and the lower clamping plate 14. The positioning post 3 can fix the relative position between the upper clamping plate 11 and the lower clamping plate 14, thereby preventing the upper clamping plate 11 and the lower clamping plate 14 from shifting during the clamping process, and ensuring the clamping effect of the electrode assembly 5.

[0054] In one embodiment, the positioning post 3 is fixedly disposed on the lower clamping plate 14 and passes through the upper clamping plate 11 along the clamping direction.

[0055] Preferably, see Figure 4The positioning part includes multiple positioning posts 3, which are spaced apart along the extension direction of the second groove 16 and pass through the lower protective member 23, the upper protective member 21, and the upper clamping plate 11 in sequence. The arrangement of multiple positioning posts 3 can further ensure the stability of the relative position between the upper clamping plate 11 and the lower clamping plate 14; and by the positioning posts 3 arranged in the second groove 16 passing through the lower protective member 23, the upper protective member 21, and the upper clamping plate 11, the stability of the relative position between the lower clamping plate 14, the lower protective member 23, the upper protective member 21, and the upper clamping plate 11 can be ensured.

[0056] Preferably, see Figure 2 and Figure 4 There are eight positioning posts 3, two of which are spaced apart along the extension direction of the transverse groove 161 at the transverse groove 161, and six of which are spaced apart along the extension direction of the vertical groove 162 at the two vertical grooves 162 respectively.

[0057] Preferably, the clamp further includes an adjustment component 4, which is used to adjust the relative distance between at least two clamping plates. By adjusting the relative distance between the clamping plates through the adjustment component 4, effective clamping of the electrode assembly 5 can be achieved, and the clamping force of the clamping plates on the electrode assembly 5 can be adjusted.

[0058] In one embodiment, the clamping plate is rectangular, and four adjustment components 4 are provided, which are respectively located at the four corners of the clamping plate.

[0059] Preferably, see Figure 1 , Figure 2 and Figure 6 The adjusting assembly 4 includes an adjusting rod 41 and an adjusting nut 42. One end of the adjusting rod 41 is fixed to the bottom of at least two clamping plates, and the other end of the adjusting rod 41 extends upward and passes through at least two clamping plates in sequence. The adjusting nut 42 is threadedly connected to the portion of the adjusting rod 41 located above the at least two clamping plates. The adjusting rod 41 connects at least two clamping plates, and the adjusting nut 42 adjusts the relative position between the at least two clamping plates along the stacking direction, thereby adjusting the clamping force on the electrode assembly 5. When it is necessary to tighten the clamping of the electrode assembly 5, the adjusting nut 42 is tightened to reduce the relative distance between the two clamping plates; when it is necessary to remove the electrode assembly 5 from the clamp, the adjusting nut 42 is loosened to separate the two clamping plates.

[0060] In one implementation, the adjusting rod 41 is a bolt.

[0061] In one embodiment, the adjusting assembly 4 further includes a shim 44, which is sleeved around the adjusting rod 41 and abuts against the clamping plate. The shim 44 ensures the stability of the connection between the adjusting rod 41 and the clamping plate.

[0062] Preferably, the adjusting assembly 4 further includes an elastic element 43, which is sleeved outside the adjusting rod 41 and compressed between the adjusting nut 42 and the tops of at least two clamping plates. The elastic element 43 can pre-tighten the clamping between the at least two clamping plates, ensuring the compactness between the at least two clamping plates, preventing the electrode assembly 5 from falling out of the fixture or becoming misaligned during the compounding process, achieving effective clamping of the electrode assembly 5, and avoiding damage to the electrode assembly 5.

[0063] In one implementation, the elastic element 43 is a compression spring.

[0064] The second aspect of this utility model provides an isostatic pressing device, which includes a clamp according to any of the above-described embodiments. The clamp holding the electrode assembly 5 is placed inside the isostatic pressing device. The medium inside the isostatic pressing device transmits uniform pressure to the clamp, thereby applying uniform pressure to the electrode assembly 5 inside the clamp and preventing deformation of the electrode assembly 5 during lamination. The electrode assembly 5 held by the clamp is placed into a sealed container filled with the medium, and pressure is gradually increased through a pressurization system, applying equal pressure to all surfaces of the clamp holding the electrode assembly 5, causing the electrode sheet to shrink densely, thus achieving lamination of the electrode assembly 5.

[0065] Preferably, to prevent the medium from entering the electrode assembly 5 during the composite processing in the isostatic pressing device, the electrode assembly 5 is encapsulated by an encapsulation material.

[0066] Preferably, the packaging material is an aluminum-plastic film.

[0067] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A clamp characterized in that, include: Clamping assembly (1), the clamping assembly (1) includes at least two stacked clamping plates, with the two adjacent clamping plates used to clamp the electrode assembly (5). as well as A protective component (2) is disposed between the two clamping plates and is configured to prevent the tabs (51) of the electrode assembly (5) from being subjected to pressure along the stacking direction of the clamping assembly (1).

2. The clamp of claim 1, wherein The protective component (2) is made of flexible material and is provided with a protective part (22). The protective part (22) is configured to isolate the tab (51) and the clamping component (1) to prevent the tab (51) from being subjected to pressure along the stacking direction of the clamping component (1).

3. The clamp of claim 2, wherein The protective part (22) is an opening extending through the protective component (2) along the stacking direction of the clamping component (1). When the electrode component (5) is disposed within the clamping component (1), the opening is located above the electrode tab (51); or The protective part (22) is a groove that can accommodate the tab (51).

4. The clamp of claim 2, wherein The two adjacent clamping plates are respectively: Upper clamping plate (11), the upper clamping plate (11) being provided with a first protrusion (12); and A lower clamping plate (14) is provided with a first groove (15) that mates with the first protrusion (12), and the electrode assembly (5) can be accommodated within the accommodating space formed between the first protrusion (12) and the first groove (15); and / or The clamp includes a positioning part for fixing the relative position between two adjacent clamping plates.

5. The clamp according to claim 4, characterized in that, The upper clamping plate (11) is further provided with a second protrusion (13) surrounding the first protrusion (12), the height of the first protrusion (12) being greater than the height of the second protrusion (13), and the lower clamping plate (14) is further provided with a second groove (16) surrounding the first groove (15), and the depth of the second groove (16) being greater than the depth of the first groove (15). The protective component (2) includes: Upper protective member (21), the protective part (22) is disposed on the upper protective member (21), the upper protective member (21) is disposed on the second protrusion (13); and The lower protective member (23) is embedded in the second groove (16).

6. The clamp of claim 5, wherein The second groove (16) includes: A transverse groove (161) is provided on one side of the first groove (15); and Two vertical grooves (162) are spaced apart on both sides of the first groove (15) along the extension direction of the transverse groove (161); and / or The second protrusion (13) includes: A lateral protrusion (131) is provided on one side of the first protrusion (12); and Two vertical protrusions (132) are spaced apart on both sides of the first protrusion (12) along the extension direction of the transverse protrusion (131).

7. The clamp of any one of claims 1-6, wherein, The clamp also includes an adjustment component (4) for adjusting the relative distance between the at least two clamping plates.

8. The clamp of claim 7, wherein, The adjustment component (4) includes: An adjusting rod (41), one end of which is fixed to the bottom of the at least two clamping plates, and the other end of which extends upward and passes through the at least two clamping plates in sequence; and Adjusting nut (42), which is threaded to the portion of the adjusting rod (41) located above the at least two clamping plates.

9. The clamp of claim 8, wherein, The adjustment assembly (4) further includes an elastic element (43) which is sleeved outside the adjustment rod (41) and compressed between the top of the adjustment nut (42) and the at least two clamping plates.

10. An isostatic pressing apparatus characterized by comprising: The isostatic pressing device includes the clamp as described in any one of claims 1-9.

Images