Cold isostatic press for solid-state battery and forming method

Abstract

The invention relates to the technical field of solid-state battery forming, in particular to a cold isostatic pressing machine for a solid-state battery and a forming method.The cold isostatic pressing machine for the solid-state battery comprises a base and a rack arranged on the base and is characterized by further comprising an adjustable supporting device arranged on the base and a pressure device arranged on the adjustable supporting device; the adjustable supporting device comprises a supporting seat, an overturning support rotationally connected to the supporting seat and a driving assembly. The pressure device comprises a pressure tank main body arranged on the overturning support; the rack is provided with a sealing device, the sealing device comprises a sealing ring, the sealing ring is provided with a wave-shaped outer wall, the sealing ring faces the opening of the pressure tank body, and the wave-shaped outer wall abuts against or is separated from the pressure tank body. The overturning support can be rotated by utilizing the adjustable supporting device, so that the interior of the tank body can be conveniently operated; and meanwhile, the sealing device is provided with a waveform outer wall, so that the sealing performance of the pressure tank main body is ensured, and the pressing efficiency can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of solid-state battery molding, and in particular to a cold isostatic press and molding method for solid-state batteries. Background Art

[0002] The cold isostatic press is a molding device that works at room temperature and high pressure. Its working principle is based on Pascal's law. It usually uses liquid (such as water or oil) as the pressure medium and rubber or plastic as the sheath mold material. With the accelerated development of solid-state batteries, cold isostatic pressing technology can effectively eliminate the gap between the solid electrolyte membrane and the battery cell, ensure the consistency requirements of dense stacking, improve the contact effect between the material and the device interface, and thus enhance conductivity and stability. Therefore, it has received much attention.

[0003] Conventional cold isostatic presses are large in size and have tall tanks. On the one hand, when used in solid-state battery production, a lifting device is required to place the mold containing the material into the pressure tank and take it out, which requires the staff to climb to the tank mouth to mount the material. Subsequent cleaning and maintenance also require the staff to climb to the tank mouth for operation, which is very cumbersome. On the other hand, the cold isostatic press usually uses an O-ring to be sleeved on its outer wall for sealing. The low sealing strength leads to pressure loss, resulting in reduced pressing efficiency of the cold isostatic press, and longer pressing time is required to complete the molding. At the same time, after molding, it is necessary to wait for the material to cool naturally before taking it out, which further increases the time required for molding. It can be seen that the maturity of cold isostatic pressing technology in the field of solid-state batteries is relatively low. Summary of the invention

[0004] The purpose of this application is to provide a cold isostatic press and a forming method for solid-state batteries, aiming to improve the operating convenience and operating efficiency of the cold isostatic press.

[0005] On the one hand, an embodiment of the present application provides a cold isostatic press for solid-state batteries, comprising a base and a frame arranged on the base, and also comprising an adjustable support device arranged on the base and a pressure device arranged on the adjustable support device; the adjustable support device comprises a support seat, a flip support rotatably connected to the support seat, and a drive assembly; the pressure device comprises a pressure tank body arranged on the flip support; the frame is provided with a sealing device, the sealing device comprises a sealing ring, the sealing ring has a corrugated outer wall, the sealing ring faces the opening of the pressure tank body, and the corrugated outer wall abuts against or disengages from the pressure tank body.

[0006] Furthermore, the pressure tank body is covered with a pressure-resistant layer and a vibration-damping layer in sequence from the inside to the outside; an alloy steel layer is provided on the inner side of the pressure-resistant layer, and a stainless steel layer is provided on the outer side of the pressure-resistant layer.

[0007] Furthermore, the pressure device also includes a cooling component, a cooling cavity is provided between the pressure-resistant layer and the vibration-damping layer, and the cooling component includes a liquid inlet pipe and a liquid outlet pipe connected to the cooling cavity.

[0008] Furthermore, the pressure device also includes a detection component and an auxiliary liquid injection component; the detection component includes a temperature sensor and a pressure sensor arranged in the pressure tank body; the auxiliary liquid injection component includes a connecting pipe arranged on the frame and a control valve arranged on the connecting pipe, the connecting pipe is connected to the pressure tank body, and the control valve is electrically connected to the detection component.

[0009] Furthermore, the corrugated outer wall includes a plurality of elastic sealing protrusions, and the plurality of elastic sealing protrusions are arranged along the height direction of the sealing ring.

[0010] Furthermore, the support seat is provided with an arc groove, the flip support is provided with a rotating wheel matching the arc groove, and the rotating wheel is rotatably connected to the arc groove; the flip support is provided with a connecting head, and the driving assembly includes a hydraulic driving rod hinged to the connecting head.

[0011] Furthermore, the base is provided with a sliding guide rail along its length direction, and the frame is arranged on the sliding guide rail; the frame is provided with a connecting pressure rod, and the sealing ring is arranged on the connecting pressure rod.

[0012] On the other hand, an embodiment of the present application provides a molding method, comprising the following steps: S1: Flip the tank body of the cold isostatic press to make the tank body of the cold isostatic press flip to a specified angle; S2: stacking the materials and vacuum-sealing the packages; S3: placing the vacuum sealed package to be processed in an elastic mold, and then sealing the elastic mold and placing it in a can; S4: Turn over the tank of the cold isostatic press so that the tank is in a vertical state, and inject a set liquid into the tank. The liquid is non-aqueous hydraulic oil, and the amount of liquid injected is controlled in real time according to the liquid pressure; S5: Seal the tank and continuously pressurize it, gradually increase the pressure to the target value and keep it stable, and monitor the pressure in the tank in real time; S6: After the pressing is completed, the pressure is gradually released, the liquid in the tank is extracted and the coolant is injected, the temperature in the tank is monitored in real time and the injection amount of the coolant is adjusted according to the temperature, and the material is taken out after cooling and the tank is cleaned.

[0013] Furthermore, the specific steps of S4 are: S4.1: Turn the tank to a vertical position; S4.2: Inject non-aqueous hydraulic fluid through the tank opening and monitor the fluid pressure during injection; S4.3: Calculate the real-time liquid level height based on the liquid pressure data; S4.4: When the liquid level reaches the specified value, stop injecting liquid.

[0014] Furthermore, the specific steps of S6 are: S6.1: After the pressing is completed, release the tank pressure at a preset interval until the tank pressure reaches the specified value, and then extract the liquid in the tank; S6.2: inject coolant into the tank body, and monitor the real-time temperature of the tank body during the process of injecting coolant; S6.3: When the temperature inside the tank reaches the specified value, stop injecting the coolant and remove the material; S6.4: Drain the coolant, invert the tank, and clean the tank.

[0015] Compared with the prior art, the present invention has the following advantages: 1. A cold isostatic press for solid-state batteries provided by the present invention has an adjustable support device, a pressure device and a sealing device. The adjustable support device can be used to rotate the flip support, thereby driving the pressure tank body to flip through the flip support. After the pressure tank body is flipped to a corresponding angle, the mold can be conveniently placed and taken out inside the tank body, and the inside of the tank body can be maintained and cleaned, thereby improving the convenience of operation of the cold isostatic press. At the same time, the sealing device is provided with a sealing ring and a corrugated outer wall on the outside of the sealing ring. When the sealing device cooperates with the pressure tank body to seal, the corrugated outer wall will abut against the pressure tank body, thereby ensuring the sealing of the pressure tank body and improving the pressing efficiency.

[0016] 2. The present invention forms a corrugated inner wall by arranging a plurality of elastic sealing protrusions. When the sealing device cooperates with the pressure tank body, as the sealing device is pressed downward, the elastic sealing protrusions will be squeezed by the liquid, and the elastic sealing protrusions will deform and shrink in the axial direction to increase their radial extension area, so that the sealing ring and the inner wall of the pressure tank body are closer to abutment, thereby further improving the airtightness of the pressure tank body, especially reducing pressure loss when the static press is in use.

[0017] 3. The present invention sets a cooling cavity between the pressure-resistant layer and the vibration-damping layer, and sets a liquid inlet pipe and a liquid outlet pipe connected to the cooling cavity. After the pressing is completed, the coolant is continuously injected into and discharged from the cooling cavity through the liquid inlet pipe and the liquid outlet pipe to form a cycle, thereby accelerating the cooling of the material inside the pressure tank body, and quickly taking out the pressed material without waiting for natural cooling, thereby effectively improving the use efficiency of the cold isostatic press; at the same time, by setting the pressure-resistant layer and the vibration-damping layer, the pressure resistance of the tank body can be ensured, and it can be prevented from rusting and oxidation, thereby increasing its service life, and can also reduce the noise and vibration generated when the cold isostatic press is used.

[0018] 4. The present invention sets a molding method and controls the liquid injection amount and cooling speed in the cold isostatic press in real time by monitoring various data, so that the cold isostatic press can effectively adapt to materials of various volumes, thereby increasing the adaptability and applicability of the cold isostatic press. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a cold isostatic press for solid-state batteries provided in Example 1 of the present application; Figure 2 It is a schematic diagram of the structure when the rack moves in the first embodiment of the present application; Figure 3 This is a schematic diagram of the structure of the adjustable support device in the first embodiment of the present application when in operation; Figure 4 is a schematic structural diagram of the adjustable support device in Example 1 of the present application; Figure 5 is a cross-sectional schematic diagram of the pressure device in Example 1 of the present application; Figure 6 is a schematic structural diagram of the sealing device in Example 1 of the present application; Figure 7 It is a schematic diagram of the steps of a molding method provided in Example 2 of the present application.

[0020] Description of reference numerals: 1. Base; 11. Sliding guide rail; 2. Frame; 21. Connecting pressure rod; 3. Adjustable supporting device; 31. Support seat; 311. Arc groove; 32. Flip support; 321. Rotating wheel; 322. Connecting head; 33. Driving assembly; 4. Pressure device; 41. Pressure tank body; 42. Pressure-resistant layer; 43. Vibration-damping layer; 44. Cooling assembly; 441. Liquid inlet pipe; 442. Liquid outlet pipe; 45. Cooling cavity; 46. Detection assembly; 461. Pressure sensor; 47. Auxiliary liquid injection assembly; 471. Connecting pipe; 472. Control valve; 5. Sealing device; 51. Sealing ring; 52. Corrugated outer wall; 521. Elastic sealing protrusion. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0024] Embodiment 1 Reference Figure 1 as well as Figure 2 On the one hand, the embodiment of the present application provides a cold isostatic press for solid-state batteries, including a base 1 and a frame 2 arranged on the base 1, and also including an adjustable support device 3 arranged on the base 1 and a pressure device 4 arranged on the adjustable support device 3, and the frame 2 is provided with a sealing device 5 facing the pressure device 4. When the cold isostatic press for solid-state batteries is in operation, the adjustable support device 3 drives the pressure device 4 to adjust and flip, so that the pressure device 4 flips to a specified angle, at which the operator can conveniently feed the material into the pressure device 4, and then the pressure device 4 flips and resets, and the sealing device 5 cooperates with the pressure device 4 to seal and press.

[0025] Specifically, the base 1 is used to support the frame 2 and various devices. In this embodiment, in order to further improve the convenience of operation, the base 1 is provided with a sliding guide rail 11 along its length direction, and the frame 2 is provided on the sliding guide rail 11, so that the frame 2 can reciprocate along the length direction of the guide rail. By providing the sliding guide rail 11, when the adjustable support device 3 is loaded and turned over, the frame 2 can be removed by the sliding guide rail 11, so as to facilitate the injection of liquid into the pressure device 4. The frame 2 is provided with a connecting pressure rod 21, and the sealing device 5 is connected to the connecting pressure rod 21. Under the drive of the connecting pressure rod 21, the sealing device 5 can be extended and retracted in the direction of the pressure device 4 for pressing.

[0026] Reference Figure 3 as well as Figure 4The adjustable support device 3 includes a support seat 31, a flip support 32 rotatably connected to the support seat 31, and a drive assembly 33. Specifically, in order to cooperate with the flip support 32, the support seat 31 is provided with an arc groove 311, and there are two arc grooves 311 that are parallel to each other. The flip support 32 is generally in an "L" shape. The flip support 32 is provided with a rotating wheel 321 that matches the arc groove 311. The position and number of the rotating wheel 321 correspond to the arc groove 311 one by one, and the rotating wheel 321 is rotatably connected to the arc groove 311. At the same time, the support seat 31 also has a support platform that cooperates with the flip support 32. The height of the support platform is flush with the height of one side of the flip support 32 after flipping to support the flip support 32. A connector 322 is provided on one side of the flip support 32. The drive assembly 33 includes a hydraulic drive rod hinged to the connector 322, one end of the hydraulic drive rod is hinged to the base 1, and the other end of the hydraulic drive rod is hinged to the connector 322. Driven by the hydraulic drive rod, the flip support 32 flips with the rotating wheel 321 as a fulcrum, and the flipping angle is 0-90°.

[0027] Reference Figure 1 as well as Figure 5 The pressure device 4 includes a pressure tank body 41 disposed on the flip support 32. The pressure tank body 41 has a cavity, one end of the length of the pressure tank body 41 is connected to the flip support 32, and the other end of the length direction of the pressure tank body 41 has an opening connected to the cavity to load materials and inject liquid. In this embodiment, in order to ensure the service life and structural strength of the pressure tank body 41, the pressure tank body 41 is sequentially coated with a pressure-resistant layer 42 and a vibration-damping layer 43 from the inside to the outside; an alloy steel layer is disposed on the inner side of the pressure-resistant layer 42, and the alloy steel layer is made of high-strength alloy steel material, and a stainless steel layer is disposed on the outer side of the pressure-resistant layer 42. By arranging the pressure-resistant layer 42 in this way, the pressure resistance performance and structural strength of the pressure tank body 41 can be guaranteed. Both sides of the vibration-damping layer 43 are stainless steel layers. The outer stainless steel layer can prevent the tank body from being oxidized and rusted when in contact with the air, and the inner stainless steel layer can avoid corrosion and rust when in contact with various media. The space between the two stainless steel layers is filled with aluminum alloy material. The sound insulation and shock absorption properties of aluminum alloy can effectively reduce the noise and vibration generated when the cold isostatic press is used.

[0028] In order to speed up the cooling speed of the material after pressing and reduce the waiting time, the pressure device 4 also includes a cooling component 44, a cooling cavity 45 is arranged between the pressure-resistant layer 42 and the vibration-damping layer 43, and the cooling component 44 includes a liquid inlet pipe 441, a liquid outlet pipe 442 and a radiator (not shown in the figure) connected to the cooling cavity 45, and the liquid inlet pipe 441 and the liquid outlet pipe 442 are connected to the radiator. By setting the cooling cavity 45, the liquid inlet pipe 441 and the liquid outlet pipe 442, when the material is pressed in the cavity of the pressure tank body 41, the cooling liquid is injected into the cooling cavity 45 for heat exchange. After the heat exchange, the cooling liquid is discharged from the liquid outlet pipe 442 to the radiator for cooling and then enters the cooling cavity 45 for circulation again, so that the material can be quickly cooled, which can greatly reduce the waiting time and improve production efficiency.

[0029] In addition, the pressure device 4 also includes a detection component 46 and an auxiliary liquid injection component 47. The detection component 46 includes a temperature sensor and a pressure sensor 461 arranged in the pressure tank body 41, the temperature sensor (not shown in the figure) is arranged on the inner wall of the pressure-resistant layer 42, and the pressure sensor 461 is located at the bottom of the pressure-resistant layer 42. The auxiliary liquid injection component 47 includes a connecting pipe 471 arranged on the frame 2 and a control valve 472 arranged on the connecting pipe 471. The connecting pipe 471 is connected to the cavity of the pressure tank body 41 through a hose (not shown in the figure), and the control valve 472 is electrically connected to the detection component 46. A control panel for observing parameters and controlling various devices is also provided on the frame 2. The cavity of the pressure tank body 41 can be monitored and the temperature and pressure data can be obtained in real time through the temperature sensor and the pressure sensor 461, and the operator can conveniently perform corresponding operations based on these data.

[0030] Reference Figure 1 as well as Figure 6 The sealing device 5 includes a sealing ring 51, which is arranged on the connecting pressure rod 21. The sealing ring 51 is matched toward the opening of the pressure tank body 41. In order to ensure the sealing match with the pressure tank body 41, the sealing ring 51 has a corrugated outer wall 52, and the corrugated outer wall 52 abuts or disengages from the pressure tank body 41. In this embodiment, the corrugated outer wall 52 includes a plurality of elastic sealing protrusions 521, and the plurality of elastic sealing protrusions 521 are arranged along the height direction of the sealing ring 51. By arranging the elastic sealing protrusions 521, when the sealing ring 51 cooperates with the pressure tank body 41 under the action of the connecting pressure rod 21, the sealing ring 51 is squeezed and contracted by the filling liquid below and the connecting pressure rod 21 above, and the elastic sealing protrusions 521 extend out and abut against the opening of the pressure tank body 41 to achieve sealing, thereby further improving the air tightness of the pressure tank body 41, especially reducing pressure loss when the static pressure machine is in use.

[0031] Embodiment 2 Reference Figure 7 On the other hand, the present application provides a molding method, comprising the following steps: S1: Flip the tank body of the cold isostatic press to make the tank body of the cold isostatic press flip to a specified angle; Specifically, the pressure tank body of the freezing static press is turned over so that the pressure tank body is turned over to a specified angle, at which the operator can conveniently operate the pressure tank body.

[0032] S2: stacking the materials and vacuum-sealing the packages; Specifically, the operator stacks the materials, including the positive electrode, the solid electrolyte membrane and the negative electrode, and the stacked materials are vacuum-sealed and packaged.

[0033] S3: placing the vacuum sealed package to be processed in an elastic mold, and then sealing the elastic mold and placing it in a can; Specifically, the vacuum-sealed packaged material is placed in a dedicated elastic mold, the elastic mold is sealed, and then loaded into a pressure tank body.

[0034] S4: Turn over the tank of the cold isostatic press so that the tank is in a vertical state, and inject a set liquid into the tank. The liquid is non-aqueous hydraulic oil, and the amount of liquid injected is controlled in real time according to the liquid pressure; Specifically, the steps of S4 are: S4.1: Turn the tank to a vertical position; The pressure tank body at a specified angle is turned over, and the turned pressure tank body is in a vertical state to prepare for pressing.

[0035] S4.2: Inject non-aqueous hydraulic fluid through the tank opening and monitor the fluid pressure during injection; Non-aqueous hydraulic oil is injected from the opening of the tank body. Specifically, the non-aqueous hydraulic oil may be special mineral oil. Meanwhile, during the injection process, the liquid pressure at a designated position is monitored by a pressure sensor to obtain liquid pressure data.

[0036] S4.3: Calculate the real-time liquid level height based on the liquid pressure data; It is understandable that due to different processes, the volume of materials put in is also different, and the amount of liquid injected also needs to be precisely controlled. If different materials are put in each time, they are manually observed and calculated and adjusted, which is not accurate enough on the one hand, and will take a lot of time on the other hand. Therefore, in order to know the amount of liquid injected and accurately control the liquid level, the real-time liquid level is calculated according to the liquid pressure and the formula: liquid pressure = liquid density × gravity acceleration × liquid level height, and the injected liquid is counted and obtained through the flow meter.

[0037] S4.4: When the liquid level reaches the specified value, stop injecting liquid.

[0038] Before liquid injection, a first liquid level height and a second liquid level height are preset. Before the first liquid level height, rapid liquid injection is performed through the opening of the pressure tank body. When the liquid level reaches the first liquid level height, rapid liquid injection is stopped, and the pressure tank body is injected with liquid using an auxiliary liquid injection component. The control valve can control the opening in real time to achieve precise control. When the liquid level reaches the second liquid level height, the liquid level reaches a specified value, and the injection is stopped and the data at this time is recorded, so that the injection volume corresponding to the material can be automatically obtained, and rapid liquid injection can be performed later.

[0039] S5: Seal the tank and continuously pressurize it, gradually increase the pressure to the target value and keep it stable, and monitor the pressure in the tank in real time; Specifically, under the action of the connecting pressure rod, the sealing ring cooperates with the pressure tank body to seal the tank body. After sealing, the pressure tank body is pressurized, and the pressure in the pressure tank body is obtained in real time during the pressurization process to monitor whether it is within a reasonable range.

[0040] S6: After the pressing is completed, the pressure is gradually released, the liquid in the tank is extracted and the coolant is injected, the temperature in the tank is monitored in real time and the injection amount of the coolant is adjusted according to the temperature, and the material is taken out after cooling and the tank is cleaned.

[0041] Furthermore, the specific steps of S6 are: S6.1: After the pressing is completed, gradually release the tank pressure at preset intervals until the tank pressure reaches the specified value, and then extract the liquid in the tank; S6.2: injecting coolant into the tank body, monitoring the real-time temperature of the tank body during the process of injecting coolant and adjusting the injection speed of coolant according to the real-time temperature; Specifically, a first temperature is preset before the coolant is injected. The coolant is first quickly filled into the cooling cavity and circulated quickly for heat exchange and cooling. When the temperature inside the pressure tank reaches the first temperature, the circulation speed of the coolant is slowed down to achieve energy saving.

[0042] S6.3: When the temperature inside the tank reaches the specified value, stop injecting the coolant and remove the material; When the temperature inside the tank reaches the specified temperature, cooling is completed, the injection of coolant is stopped and the material is taken out of the pressure tank body.

[0043] S6.4: Drain the coolant, invert the tank, and clean the tank.

[0044] After the coolant in the cooling chamber is discharged, the tank body is turned over to a specified angle, and the operator or corresponding equipment cleans the main body of the pressure tank.

[0045] The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, configurations or implementations described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent configurations included in the spirit and scope of the appended claims.

Claims

1. A cold isostatic press for solid-state batteries, comprising a base (1) and a frame (2) arranged on the base (1), characterized in that: The invention also comprises an adjustable support device (3) arranged on the base (1) and a pressure device (4) arranged on the adjustable support device (3); the adjustable support device (3) comprises a support seat (31), a tilting support seat (32) rotatably connected to the support seat (31), and a driving assembly (33); the pressure device (4) comprises a pressure tank body (41) arranged on the tilting support seat (32); the frame (2) is provided with a sealing device (5), the sealing device (5) comprises a sealing ring (51), the sealing ring (51) has a corrugated outer wall (52), the sealing ring (51) faces the opening of the pressure tank body (41), and the corrugated outer wall (52) abuts against or separates from the pressure tank body (41).

2. A cold isostatic press for solid-state batteries according to claim 1, characterized in that: The pressure tank body (41) is covered with a pressure-resistant layer (42) and a vibration-damping layer (43) in sequence from the inside to the outside; an alloy steel layer is provided on the inner side of the pressure-resistant layer (42), and a stainless steel layer is provided on the outer side of the pressure-resistant layer (42).

3. A cold isostatic press for solid-state batteries according to claim 2, characterized in that: The pressure device (4) further comprises a cooling assembly (44); a cooling cavity (45) is provided between the pressure-resistant layer (42) and the vibration-damping layer (43); and the cooling assembly (44) comprises a liquid inlet pipe (441) and a liquid outlet pipe (442) connected to the cooling cavity (45).

4. A cold isostatic press for solid-state batteries according to claim 3, characterized in that: The pressure device (4) further comprises a detection component (46) and an auxiliary liquid injection component (47); the detection component (46) comprises a temperature sensor and a pressure sensor (461) arranged in the pressure tank body (41); the auxiliary liquid injection component (47) comprises a connecting pipe (471) arranged on the frame (2) and a control valve (472) arranged on the connecting pipe (471); the connecting pipe (471) is connected to the pressure tank body (41), and the control valve (472) is electrically connected to the detection component (46).

5. A cold isostatic press for solid-state batteries according to any one of claims 1 to 4, characterized in that: The corrugated outer wall (52) comprises a plurality of elastic sealing protrusions (521), and the plurality of elastic sealing protrusions (521) are arranged along the height direction of the sealing ring (51).

6. A cold isostatic press for solid-state batteries according to any one of claims 1 to 4, characterized in that: The support seat (31) is provided with an arc-shaped groove (311), and the flip support (32) is provided with a rotating wheel (321) matching the arc-shaped groove (311), and the rotating wheel (321) is rotatably connected to the arc-shaped groove (311); the flip support (32) is provided with a connecting head (322), and the driving component (33) includes a hydraulic driving rod hinged to the connecting head (322).

7. The cold isostatic press for solid-state batteries according to claim 1, characterized in that: The base (1) is provided with a sliding guide rail (11) along its length direction, and the frame (2) is arranged on the sliding guide rail (11); the frame (2) is provided with a connecting pressure rod (21), and the sealing ring (51) is arranged on the connecting pressure rod (21).

8. A molding method, characterized in that: The steps include: S1: Flip the tank body of the cold isostatic press to make the tank body of the cold isostatic press flip to a specified angle; S2: stacking the materials and vacuum-sealing the packages; S3: placing the vacuum sealed package to be processed in an elastic mold, and then sealing the elastic mold and placing it in a can; S4: Turn over the tank of the cold isostatic press so that the tank is in a vertical state, and inject a set liquid into the tank. The liquid is non-aqueous hydraulic oil, and the amount of liquid injected is controlled in real time according to the liquid pressure; S5: Seal the tank and continuously pressurize it, gradually increase the pressure to the target value and keep it stable, and monitor the pressure in the tank in real time; S6: After the pressing is completed, the pressure is gradually released, the liquid in the tank is extracted and the coolant is injected, the temperature in the tank is monitored in real time and the injection amount of the coolant is adjusted according to the temperature, and the material is taken out after cooling and the tank is cleaned.

9. A molding method according to claim 8, characterized in that: The specific steps of S4 are: S4.1: Turn the tank to a vertical position; S4.2: Inject non-aqueous hydraulic fluid through the tank opening and monitor the fluid pressure during injection; S4.3: Calculate the real-time liquid level height based on the liquid pressure data; S4.4: When the liquid level reaches the specified value, stop injecting liquid.

10. A molding method according to claim 8, characterized in that: The specific steps of S6 are: S6.1: After the pressing is completed, release the tank pressure at a preset interval until the tank pressure reaches the specified value, and then extract the liquid in the tank; S6.2: inject coolant into the tank body, and monitor the real-time temperature of the tank body during the process of injecting coolant; S6.3: When the temperature inside the tank reaches the specified value, stop injecting the coolant and remove the material; S6.4: Drain the coolant, invert the tank, and clean the tank.

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