A heating mold for solid-state battery production

Abstract

This utility model belongs to the field of solid-state battery technology and provides a heating mold for solid-state battery production, including a pressure plate, a support plate, and fastening bolts. A solid-state battery extrusion mold is provided between the pressure plate and the support plate. The extrusion mold includes an upper pressure head, a lower pressure head, and an intermediate insulation sleeve. An extrusion column is provided on the upper pressure head, and a sealing plate is provided at the upper end of the insulation sleeve. The extrusion column passes through the sealing plate and is installed inside the insulation sleeve. Both the upper and lower pressure heads are provided with electric heating elements and through holes for installing thermocouples. By providing electric heating elements and thermocouples on both the upper and lower pressure heads, and placing the thermocouples close to the solid-state battery, the temperature monitoring of the solid-state battery is ensured, ensuring uniform heating of the solid-state battery and avoiding the impact of internal temperature differences on the production, processing, or testing results of the solid-state battery. A clearance cavity is provided in the wire channel to reduce the impact of wire installation on the contact between the electric heating elements and the upper or lower pressure head, ensuring heat conduction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of solid-state battery technology, and in particular to a heating mold used in the production of solid-state batteries. Background Technology

[0002] Currently, sulfide solid-state batteries consist of a positive electrode material, a negative electrode material, and an intermediate separator electrolyte layer. To ensure the charging and discharging requirements of solid-state batteries, clamps are needed to ensure normal use and the number of charge-discharge cycles. This is especially important in the testing phase, where clamps are required to test the performance of solid-state batteries under certain pressures and temperatures. However, existing clamps have several drawbacks, such as: 1. Heating components are placed inside existing plastic molds, but the plastic molds have limited temperature tolerance, and the upper temperature limit does not meet the usage requirements; 2. Heating the plastic molds externally causes the plastic to soften after reaching a certain temperature; 3. Heating the plastic molds externally results in low heat conduction efficiency and uneven temperature distribution inside and outside the solid-state battery; 4. Existing ceramic molds are prone to breakage. Patent CN222379854U discloses a solid-state battery testing device and system for in-situ optical characterization of micro-region thermo-mechanical-magnetic properties. It mentions a design that sets up a heating device inside the mold. However, this design still has certain drawbacks. When one mold is heated, the temperature inside the other mold or the temperature near the battery material in the mold cannot be monitored. This makes it impossible to ensure that the battery material is heated evenly or that the internal temperature is consistent. At the same time, there is currently no matching production fixture for production. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a heating mold for solid-state battery production that can accurately monitor the temperature during the extrusion process of battery materials, ensure the internal temperature uniformity of battery materials, improve the production and processing quality of solid-state batteries, or provide accurate detection.

[0004] The technical solution of this utility model is as follows: a heating mold for solid-state battery production, comprising a pressure plate, a support plate, and fastening bolts. One end of the fastening bolts is detachably or fixedly connected to the support plate. The pressure plate is sleeved on the other end of the fastening bolts and positioned by a nut. A solid-state battery extrusion mold is provided between the pressure plate and the support plate. An upper insulating gasket and a lower insulating gasket are respectively provided at the upper and lower ends of the extrusion mold. A pressure sensor is provided at the lower end of the lower insulating gasket. The extrusion mold includes an upper pressure head, a lower pressure head, and an intermediate insulation sleeve. The lower pressure head is located at the lower end of the insulation sleeve. An extrusion column is provided on the upper pressure head. A sealing plate is provided at the upper end of the insulation sleeve. The extrusion column passes through the sealing plate and is installed inside the insulation sleeve for extruding solid-state battery material in the insulation sleeve. Both the upper and lower pressure heads are provided with electric heating elements and through holes for installing thermocouples.

[0005] The advantage of this solution is that electric heating elements are installed on both the upper and lower pressure heads, and thermocouples are installed accordingly. Thermocouples are used to monitor the temperature of the side of the upper and lower pressure heads closest to the solid-state battery material, and to monitor in real time whether the temperature of the upper and lower ends of the solid-state battery is consistent. This ensures that the solid-state battery material is heated evenly, and that the temperature of the solid-state battery material is consistent or not significantly different. This avoids large temperature differences during heat conduction and ensures the accuracy of solid-state battery production, processing, or testing.

[0006] A further technical solution of this utility model is: both the upper and lower pressure heads are provided with cavities for installing heating elements, each cavity is provided with a limiting post, and a wire channel is provided on one side of the cavity; the wire channel is connected to the cavity and is used to place the wires on the electric heating element.

[0007] A further technical solution of this utility model is: the wire channel is provided with a clearance cavity. The clearance cavity facilitates the placement of the connection between the electric heating element and the wire, and avoids the wire from obstructing the contact area between the electric heating element and the upper or lower pressure head, thus affecting the heat conduction effect.

[0008] A further technical solution of this utility model is: the through hole is a blind hole and is set on the limiting post, and the blind hole extends along the central axis of the upper or lower pressure head towards the solid-state battery; in order to be close to the solid-state battery, it is convenient to detect the temperature of the solid-state battery and ensure that the solid-state battery material is heated evenly and at a consistent temperature.

[0009] A further technical solution of this utility model is: the electric heating element is in the shape of an annular ring; during use, the annular electric heating element is installed in the cavity and fitted onto the limiting post. The limiting post limits the electric heating element, preventing it from falling off, and at the same time improving the heat conduction efficiency.

[0010] A further technical solution of this utility model is: the electric heating element is embedded in the upper pressure head and the lower pressure head, and is arranged in a wave-S shape.

[0011] A further technical solution of this utility model is that both the upper pressure head and the lower pressure head are provided with wire connection screw holes.

[0012] A further technical solution of this utility model is that the thermocouple is connected to the temperature controller via a wire.

[0013] A further technical solution of this utility model is that the pressure sensor is connected to the display.

[0014] A further technical solution of this utility model is: a detachable connecting wire is provided inside the screw hole, and the wire is connected to an electrochemical workstation.

[0015] This utility model has the following beneficial effects: 1. By installing electric heating elements and thermocouples on both the upper and lower pressure heads, and placing the thermocouples close to the solid-state battery, the temperature of the solid-state battery can be monitored, ensuring uniform heating and avoiding temperature differences within the solid-state battery that could affect its production, processing, or testing.

[0016] 2. By providing a clearance cavity within the wire channel, the impact of wire installation on the contact between the electric heating element and the upper or lower pressure head is effectively reduced, ensuring heat conduction efficiency.

[0017] 3. The fixture of this utility model can improve the production and processing quality or the accuracy of testing of solid-state batteries.

[0018] The detailed structure of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A sectional view of the structure; Figure 3 This is a schematic diagram of the downward pressure head structure; Figure 4 for Figure 3 Schematic diagram of the bottom structure of the middle and lower pressure head; Figure 5 This is a schematic diagram of the upper pressure head structure; Figure 6 This is a schematic diagram showing the installation and use of the thermocouple in the pressure head of this utility model; Figure 7 This is a schematic diagram showing the installation and use of the thermocouple in the upper pressure head of this utility model; Figure 8 This is a schematic diagram of the working state of this utility model; 1. Support plate; 2. Pressure sensor; 3. Lower insulating gasket; 4. Lower pressure head; 5. Insulation sleeve; 6. Fastening bolt; 7. Sealing plate; 8. Upper pressure head; 9. Upper insulating gasket; 10. Pressure plate; 11. Fastening nut; 12. Support column; 13. Sealing ring; 14. Limiting column; 15. Through hole; 16. Wire channel; 17. Alternating cavity; 18. Cavity; 19. First screw hole; 20. Second screw hole; 21. Extrusion column; 22. Positive electrode material; 23. Intermediate septum electrolyte layer; 24. Negative electrode material; 25. Electric heating element; 26. Electrochemical workstation; 27. Thermocouple; 28. Temperature controller; 29. ​​Display meter. Detailed Implementation

[0020] As attached Figure 1-8As shown: A heating mold for solid-state battery production includes a pressure plate 10, a support plate 1, and a fastening bolt 6. One end of the fastening bolt 6 is detachably or fixedly connected to the support plate 1. The pressure plate 10 is sleeved on the other end of the fastening bolt 6 and positioned by a nut. A solid-state battery extrusion mold is provided between the pressure plate 10 and the support plate 1. An upper insulating gasket 9 and a lower insulating gasket 3 are respectively provided at the upper and lower ends of the extrusion mold. A pressure sensor 2 is provided at the lower end of the lower insulating gasket 3. The extrusion mold includes an upper pressure head 8, a lower pressure head 4, and an intermediate insulation sleeve 5. The lower pressure head 4 is located at the lower end of the insulation sleeve 5. A coaxial extrusion column 21 is provided on the upper pressure head 8. A sealing plate 7 is provided at the upper end of the insulation sleeve 5. The pressure column 21 passes through the sealing disc 7 and is installed inside the insulation sleeve 5. The lower pressure head 4 is provided with a support column 12 that matches the pressure column 21. The support column 12 is provided with an annular groove, and a sealing ring 13 is installed in the annular groove to make the support column 12 fit tightly with the insulation sleeve 5 to prevent solid battery material from leaking out. The pressure column 21, the support column 12 and the insulation sleeve 5 work together to compress the solid battery material in the insulation sleeve 5. The upper pressure head 8 and the lower pressure head 4 are both provided with electric heating elements 25 and through holes 15 for installing thermocouples 27. In order to ensure the compression effect of the solid battery material, the sum of the length of the pressure column 21 and the length of the support column is not less than the height of the insulation sleeve 5 to ensure that the solid battery material can be compressed.

[0021] This design simultaneously installs electric heating elements 25 on the upper pressure head 8 and the lower pressure head 4, and correspondingly installs thermocouples 27. Thermocouples 27 are used to monitor the temperature of the side of the upper pressure head 8 and the lower pressure head 4 closest to the solid-state battery material, and to monitor in real time whether the temperature of the upper and lower ends of the solid-state battery is consistent, so as to ensure that the solid-state battery material is heated evenly, and that the temperature of the solid-state battery material is consistent or not significantly different, so as to avoid large temperature differences during heat conduction and ensure the accuracy of solid-state battery production, processing or testing.

[0022] In this embodiment, both the upper pressure head 8 and the lower pressure head 4 are provided with cavities 18 for mounting heating elements. Each cavity 18 is provided with a limiting post 14. A wire channel 16 is provided on one side of the cavity 18. The wire channel 16 is connected to the cavity 18 and is used to place the wires on the electric heating element 25. A clearance cavity 17 is provided in the wire channel 16. The clearance cavity 17 facilitates the placement of the connection between the electric heating element 25 and the wires, and avoids the wires obstructing the contact area between the electric heating element 25 and the upper pressure head 8 or the lower pressure head 4, thus affecting the heat conduction effect.

[0023] In this embodiment, the through hole 15 is a blind hole and is set on the limiting post 14. The limiting post 14 on the upper pressure head 8 and the lower pressure head 4 are both located on the central axis. The blind hole extends along the central axis of the upper pressure head 8 or the lower pressure head 4 towards the solid-state battery. This is to be close to the solid-state battery, so as to facilitate the detection of the solid-state battery temperature and ensure that the solid-state battery material is heated evenly and at a consistent temperature.

[0024] The electric heating element 25 is in the shape of a ring. During use, the electric heating element 25 is installed in the cavity 18 and placed on the limiting post 14. The limiting post 14 limits the electric heating element 25 to prevent it from falling off and improves the heat conduction efficiency.

[0025] In another embodiment, the electric heating element 25 is wavy S-shaped and integrally formed by embedding it in the upper pressure head 8 and the lower pressure head 4; the heating element can also be arranged in concentric circles to ensure the contact area and heat conduction between the heating element and the upper pressure head 8 or the lower pressure head 4; the heating element can be made of a high thermal conductivity metal, such as copper, high thermal conductivity alloy, etc.

[0026] In this embodiment, both the upper pressure head 8 and the lower pressure head 4 are provided with wire connection screw holes; preferably, the lower pressure head 4 is provided with a first screw hole 19 and the upper pressure head 8 is provided with a second screw hole 20. Wires are detachably connected to both the first screw hole 19 and the second screw hole 20 via threads. The other ends of both wires are connected to the electrochemical workstation 26 for detecting the performance of the solid-state battery. Thermocouples 27 on both the upper pressure head 8 and the lower pressure head 4 are connected to a temperature controller 28 via wires and transmit temperature information to the temperature controller 28. The temperature controller 28 is also connected to an electric heating element 25. The temperature controller 28 controls the operation of the electric heating element 25 based on the temperature values ​​monitored by the thermocouples 27 to ensure that the temperature of the solid-state battery material reaches the required temperature. The pressure sensor 2 is connected to a display 29 to monitor pressure changes in real time and the performance of the solid-state battery under different pressures.

[0027] This invention features electric heating elements 25 and thermocouples 27 on both the upper pressure head 8 and the lower pressure head 4, with the thermocouples 27 positioned close to the solid-state battery. This ensures uniform heating of the solid-state battery and prevents internal temperature differences from affecting its production, processing, or testing. Furthermore, the presence of a recessed cavity 17 within the wire channel 16 effectively reduces the impact on contact between the electric heating elements 25 and the upper or lower pressure head 8 during wire installation, thus ensuring efficient heat conduction.

[0028] The working principle and usage method of this utility model are as follows: First, install the pressure sensor 2 on the support plate 1, then install the lower insulating pad 3 on the pressure sensor 2, and then install the lower pressure head 4 on the lower insulating pad 3. During installation, the thermocouple 27 and the electric heating element 25 should be installed on the lower pressure head 4 first, and then the insulation sleeve 5 should be installed on the lower pressure head 4. At this time, keep the position between the lower pressure head 4 and the insulation sleeve 5 unchanged, and start adding the positive electrode material 22, the intermediate separator electrolyte layer 23 and the negative electrode material 24 to the insulation sleeve 5 in sequence. The positions of the positive electrode material 22 and the negative electrode material 24 can be interchanged. After adding the solid-state battery materials, put the sealing plate 7 on the extrusion column 21 of the upper pressure head 8, and insert the extrusion column 21 into the insulation sleeve 5. The sealing plate 7 locks the upper end of the insulation sleeve 5, and the electric heating element on the upper pressure head 8 is then installed. After the heating element 25 and thermocouple 27 are installed, the upper insulating gasket 9 is installed on the top of the upper pressure head 8, and the pressure plate 10 is placed on the fastening bolt 6. Then, it is moved to the press to apply pressure and tighten. When the required pressure is reached, the fastening nut 11 is fixed on the bolt to limit the pressure plate 10 and maintain the pressure on the solid-state battery. At this time, the wire is installed through the thread in the first screw hole 19 and the second screw hole 20 and connected to the electrochemical workstation 26. Thermocouple 27 is connected to temperature controller 28 through the wire. Temperature controller 28 is also connected to electric heating element 25. Thermocouple 27 transmits the temperature value to temperature controller 28. Temperature controller 28 controls the operation of electric heating element 25 to make the temperature reach the required temperature. Pressure sensor 2 is connected to display meter 29 through the wire to observe the pressure value.

[0029] The above describes the preferred embodiment of this utility model and the technical principles used therein. For those skilled in the art, any obvious changes such as equivalent transformations or simple substitutions based on the technical solution of this utility model without departing from the spirit and scope of the utility model are within the protection scope of this utility model.

Claims

1. A heating mold for solid-state battery production, comprising a pressure plate, a support plate, and a fastening bolt, one end of which is detachably or fixedly connected to the support plate, the pressure plate being sleeved on the other end of the fastening bolt and positioned by a nut, a solid-state battery extrusion mold being disposed between the pressure plate and the support plate, the upper and lower ends of the extrusion mold being respectively provided with an upper insulating gasket and a lower insulating gasket, and a pressure sensor being disposed at the lower end of the lower insulating gasket, characterized in that: The extrusion die includes an upper pressure head, a lower pressure head, and an intermediate insulation sleeve. The lower pressure head is located at the lower end of the insulation sleeve, and the upper pressure head is provided with an extrusion column. The upper end of the insulation sleeve is provided with a sealing plate. The extrusion column passes through the sealing plate and is installed inside the insulation sleeve. Both the upper and lower pressure heads are provided with electric heating elements and through holes for installing thermocouples.

2. The heating mold for solid-state battery production according to claim 1, characterized in that: Both the upper and lower pressure heads are provided with cavities for installing heating elements, and each cavity is provided with a limiting post. A wire channel is provided on one side of the cavity.

3. The heating mold for solid-state battery production according to claim 2, characterized in that: The conductor channel is provided with a clearance cavity.

4. The heating mold for solid-state battery production according to claim 1, characterized in that: The through hole is a blind hole and is set on the limiting post. The blind hole extends along the central axis of the upper or lower pressure head towards the solid-state battery.

5. The heating mold for solid-state battery production according to claim 1, characterized in that: The electric heating element is in the shape of a ring.

6. The heating mold for solid-state battery production according to claim 1, characterized in that: The electric heating element is embedded in the upper and lower pressure heads and is arranged in a wave-S shape.

7. The heating mold for solid-state battery production according to claim 1 or 6, characterized in that: Both the upper and lower pressure heads are provided with wire connection screw holes.

8. The heating mold for solid-state battery production according to claim 1, characterized in that: The heating mold also includes a thermocouple, which is connected to a temperature controller via wires.

9. The heating mold for solid-state battery production according to claim 1, characterized in that: The pressure sensor is connected to the display.

10. The heating mold for solid-state battery production according to claim 7, characterized in that: A detachable wire is connected inside the screw hole, and the wire is connected to the electrochemical workstation.

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