Isostatic press jig, isostatic press device, and battery production line
By designing an isostatic pressing fixture, the system ensures uniform stress on all six sides of the solid-state battery, protects the tabs, and solves the problems of bending and damage to the electrodes and tabs during the isostatic pressing process, thereby improving the product quality of the battery production line.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU QINGTAO NEW ENERGY TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-03
AI Technical Summary
During the isostatic pressing process, the six sides of the solid-state battery are subjected to large-area pressure, which causes the edges of the electrode sheets and tabs to bend and deform, affecting the structural strength of the cell and making it easy for powder to fall off the edges.
Design an isostatic pressure fixture, including a frame assembly and a pressure plate. The frame assembly has a tab clearance groove at the tab position, and one end of the tab clearance hole is blocked. The pressure plate is housed in the clearance groove to ensure that the six sides of the battery cell are evenly stressed. The tab clearance hole is closed to prevent force transmission and avoid bending or damage to the tab.
This achieves uniform force distribution on all six sides of the solid-state battery, protects the tabs from damage, reduces the damage rate of the electrodes and tabs, and improves product quality.
Smart Images
Figure CN224446982U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to an isostatic pressing fixture, an isostatic pressing device, and a battery production line. Background Technology
[0002] In the field of solid-state batteries, high pressure is often used to ensure tight contact between the interfaces, bringing the negative electrode, electrolyte membrane, and positive electrode into close contact. Under isostatic pressure, all six sides of the product are subjected to pressure. For solid-state batteries, this large-area pressure effectively ensures tight contact between the negative electrode, electrolyte membrane, and positive electrode. However, pressure on the sides of the battery can cause bending and deformation of the electrode sheets and tabs, easily leading to powder shedding from the edges and affecting the structural strength of the cell.
[0003] Therefore, there is an urgent need to design an isostatic pressing fixture, isostatic pressing equipment, and battery production line to solve the above problems. Utility Model Content
[0004] One objective of this invention is to provide an isostatic pressure fixture that ensures uniform force distribution on all six sides of the solid-state battery and provides comprehensive protection for the tabs, preventing the electrodes and tabs from being bent or deformed under pressure and reducing the possibility of damage to the solid-state battery.
[0005] Another objective of this invention is to provide an isostatic pressing device that, by employing the aforementioned isostatic pressing fixture, can prevent the electrode plates and tabs from being bent or damaged during the isostatic pressing process.
[0006] Another objective of this invention is to provide a battery production line that, by employing the aforementioned isostatic pressing equipment, produces solid-state batteries with a low tab damage rate and better product quality.
[0007] To achieve this objective, the present invention adopts the following technical solution:
[0008] An isostatic pressing fixture is used in solid-state batteries, wherein the solid-state battery includes a body and two tabs connected to the body, and the isostatic pressing fixture includes:
[0009] A frame assembly includes two interlocking frames. The frame assembly has a through hole that is adapted to the shape of the body and is used to accommodate the body. The interlocking surfaces of the frames have tab clearance grooves corresponding to the tabs. The two opposite tab clearance grooves form tab clearance holes. One end of the tab clearance hole is sealed. The tab clearance hole is used to accommodate the corresponding tab. Each frame has a receiving groove on the side away from the interlocking surface. The size of the receiving groove is larger than the size of the through hole.
[0010] Two pressure plates are provided, each corresponding to one of the aforementioned receiving slots, with at least a portion of the pressure plates being received within the corresponding receiving slots.
[0011] As an alternative, the aforementioned tab clearance hole is a blind hole.
[0012] As an optional solution, the aforementioned tab clearance groove is a through groove in the extension direction of the aforementioned tab, and the aforementioned isostatic pressing fixture also includes a sealing member. A sealing groove is provided at the end of each of the aforementioned tab clearance holes opposite to the aforementioned through hole, and each of the aforementioned sealing grooves contains one of the aforementioned sealing members.
[0013] As an alternative, each of the above-mentioned frames is provided with a sealing sub-slot, and each of the above-mentioned sealing sub-slots consists of two sealing sub-slots arranged opposite each other.
[0014] As an alternative, the cross-section of the through hole is rectangular, and the tab clearance holes are located on opposite sides of the through hole.
[0015] As an optional solution, the distance between the perimeter of the pressure plate and the corresponding accommodating groove wall is L, where 0.1mm≤L≤0.5mm.
[0016] As an alternative, the depth of the aforementioned receiving groove is greater than the thickness of the aforementioned pressure plate.
[0017] As an alternative, the thickness difference of the body before and after static pressure is H1, and the difference between the depth of the accommodating groove and the thickness of the pressure plate is H2, where H2 > H1.
[0018] Isostatic pressing equipment, including the aforementioned isostatic pressing fixture;
[0019] An isostatic press is configured to pressurize the six surfaces of the isostatic fixture containing the solid-state battery.
[0020] The battery production line includes the aforementioned isostatic pressing equipment.
[0021] The beneficial effects of this utility model are as follows:
[0022] This utility model provides an isostatic pressing fixture. In use, one of the pressure plates is placed into the corresponding receiving groove, sealing one end of the through hole. Then, the solid-state battery is placed into the through hole, and the other frame is fastened in place. During the isostatic pressing process, the six sides of the isostatic pressing fixture are subjected to force. The two pressure plates gradually move towards the solid-state battery until they abut against the bottom of the receiving groove, pressing the thickness of the solid-state battery to be consistent with the height of the through hole. During this process, since the force is uniform on every part of the large surface of the battery cell, it can effectively protect the battery cell electrode from damage. The two tabs are housed in the corresponding tab clearance holes. For the side perpendicular to the extension direction of the tab, since one end of the tab clearance hole is closed, it has a protective effect on the tab. The force on this side will not be transmitted to the tab, thus preventing the tab from being bent or damaged during the isostatic pressing process.
[0023] This invention also provides an isostatic pressing device, including the aforementioned isostatic pressing fixture and an isostatic press, wherein the isostatic press is configured to pressurize the six surfaces of the isostatic pressing fixture containing a solid-state battery. By employing the aforementioned isostatic pressing fixture, the above-mentioned isostatic pressing device can prevent the electrodes and tabs from being bent or damaged during the isostatic pressing process.
[0024] This invention also provides a battery production line, including the aforementioned isostatic pressing equipment. By employing this isostatic pressing equipment, the solid-state batteries produced have a lower damage rate to the electrodes and tabs, resulting in better product quality. Attached Figure Description
[0025] Figure 1 This is an exploded view of the isostatic pressing fixture provided in this embodiment of the utility model;
[0026] Figure 2 This is a cross-sectional view of the isostatic pressing fixture provided in this embodiment of the utility model;
[0027] Figure 3 This is a structural schematic diagram of the isostatic pressure fixture provided in this embodiment of the utility model.
[0028] In the picture:
[0029] 10. Frame assembly; 11. Frame; 111. Fastening surface; 112. Electrode clearance groove; 113. Receiving groove; 114. Sealing sub-groove; 12. Through hole; 13. Electrode clearance hole; 14. Sealing groove;
[0030] 20. Pressure plate;
[0031] 30. Sealing components. Detailed Implementation
[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0035] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0036] This embodiment provides an isostatic pressing fixture that ensures uniform stress on all six sides of the solid-state battery and provides comprehensive protection for the tabs, preventing bending and deformation of the electrodes and tabs under pressure, thus reducing the possibility of damage to the solid-state battery. This isostatic pressing fixture is applied to solid-state batteries, which include a body and two tabs connected to the body, such as... Figures 1-3As shown, the isostatic pressing fixture includes a frame assembly 10 and two pressure plates 20. The frame assembly 10 includes two interlocking frames 11. The frame assembly 10 has a through hole 12, which is adapted to the shape of the body and is used to accommodate the body. The interlocking surface 111 of the frame 11 has a tab relief groove 112 corresponding to the position of the tab. The two opposite tab relief grooves 112 form a tab relief hole 13. One end of the tab relief hole 13 is sealed. The tab relief hole 13 is used to accommodate the corresponding tab. Each frame 11 has a receiving groove 113 on the side away from the interlocking surface 111. The size of the receiving groove 113 is larger than the size of the through hole 12. The two pressure plates 20 are arranged one-to-one with the receiving grooves 113, and at least part of the pressure plates 20 are accommodated in the corresponding receiving grooves 113.
[0037] When using the aforementioned isostatic pressing fixture, one of the pressure plates 20 is placed into the corresponding receiving groove 113, thus sealing one end of the through hole 12. The solid-state battery is then placed into the through hole 12, and the other frame 11 is then fastened into place. During the isostatic pressing process, the six sides of the isostatic pressing fixture are subjected to force. The two pressure plates 20 gradually move towards the solid-state battery until they reach the bottom of the receiving groove 113, pressing the thickness of the solid-state battery to be consistent with the height of the through hole 12. During this process, the long side and the top and bottom large surfaces of the cell are subjected to force evenly, which can prevent the electrode from being damaged. The two tabs are housed in the corresponding tab clearance holes 13. For the two sides perpendicular to the extension direction of the tabs, since one end of the tab clearance hole 13 is closed, it has a protective effect on the tabs. The force on this side will not be transmitted to the tabs, thus preventing the tabs from being bent or damaged during the isostatic pressing process.
[0038] In an optional embodiment, the tab clearance hole 13 is a blind hole (not shown). This ensures that one end of the tab clearance hole 13 is closed. It is understood that in this embodiment, the tab clearance groove 112 is open at one end and closed at the other end.
[0039] In this embodiment, as Figure 1 As shown, the tab clearance groove 112 is a through groove in the extension direction of the tab. The isostatic pressing fixture also includes a sealing member 30. Each tab clearance hole 13 has a sealing groove 14 at the end opposite to the through hole 12, and each sealing groove 14 contains a sealing member 30. It can be understood that in this embodiment, the tab clearance hole 13 is also a through hole, and the sealing member 30 can be installed later. Thus, during the fastening process of the two frames 11, the state of the tab can be clearly observed, preventing the tab from being scratched due to operational errors during the fastening process.
[0040] Optionally, the sealing component 30 can be made of metal to ensure a certain level of strength.
[0041] Optionally, a silicone part can be provided between the sealing part 30 and the bottom of the sealing groove 14 to increase the sealing performance after sealing.
[0042] Optionally, each frame 11 has a sealing sub-groove 114, and each sealing groove 14 consists of two opposing sealing sub-grooves 114. This ensures that the sealing groove 14 is substantially centered in the thickness direction of the frame assembly 10, corresponding to the position of the electrode tab. The silicone part can be an annular piece and is bonded to the bottom of one of the sealing sub-grooves 114.
[0043] For solid-state batteries, the main body is generally rectangular. Correspondingly, the cross-section of the through hole 12 is rectangular, and the tab clearance holes 13 are located on opposite sides of the through hole 12.
[0044] In other embodiments, such as when the tab is on the same side of the body, the tab clearance groove 112 can be adjusted according to the position of the tab.
[0045] Optionally, such as Figure 2 As shown, the distance between the perimeter of the pressure plate 20 and the wall of the corresponding receiving groove 113 is L, 0.1mm≤L≤0.5mm. This setting allows for a certain margin of error when placing the pressure plate 20, reducing the manufacturing precision of the pressure plate 20 and the operational difficulty when placing it. Figure 2 The distance shown is between the pressure plate 20 and the wall of the receiving groove 113 in the left-right direction. This distance also applies in the front-back direction.
[0046] For example, the interval can be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc.
[0047] Optionally, the depth of the receiving groove 113 is greater than the thickness of the pressure plate 20. This ensures that the pressure plate 20 is completely within the corresponding receiving groove 113 when the body is compacted.
[0048] Optionally, the thickness difference of the body before and after isostatic pressing is H1, and the difference between the depth of the receiving groove 113 and the thickness of the pressure plate 20 is H2, where H2 > H1. It is understood that before isostatic pressing, the thickness of the body will be relatively large, and a portion of it will protrude from the bottom of the receiving groove 113. At this time, when the pressure plate 20 is placed at the bottom of the receiving groove 113, the pressure plate 20 cannot be flush with the bottom of the receiving groove 113. The above setting ensures that when the pressure plate 20 is placed, even when the pressure plate 20 is lifted to a certain height by the body, at least part of the pressure plate 20 can still be received in the receiving groove 113, preventing the pressure plate 20 from being dislodged from the receiving groove 113.
[0049] This embodiment also provides an isostatic pressing apparatus, including the aforementioned isostatic pressing fixture and an isostatic press (not shown), wherein the isostatic press is configured to pressurize the six surfaces of the isostatic pressing fixture containing the solid-state battery. By employing the aforementioned isostatic pressing fixture, the above-mentioned isostatic pressing apparatus can prevent the electrodes and tabs from being bent or damaged during the isostatic pressing process.
[0050] This embodiment also provides a battery production line, including the aforementioned isostatic pressing equipment. By employing the isostatic pressing equipment, this battery production line produces solid-state batteries with lower damage rates to the electrodes and tabs, resulting in better product quality.
[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An isostatic pressure fixture, applied to solid-state batteries, said solid-state battery comprising a body and two tabs connected to the body, characterized in that, The isostatic pressure fixture includes: A frame assembly (10) includes two interlocking frames (11). The frame assembly (10) has a through hole (12). The through hole (12) is adapted to the shape of the body and is used to accommodate the body. The interlocking surface (111) of the frame (11) has a tab relief groove (112) corresponding to the position of the tab. The two opposite tab relief grooves (112) form a tab relief hole (13). One end of the tab relief hole (13) is sealed. The tab relief hole (13) is used to accommodate the corresponding tab. Each frame (11) has a receiving groove (113) on the side away from the interlocking surface (111). The size of the receiving groove (113) is larger than the size of the through hole (12). Two pressure plates (20) are provided in a one-to-one correspondence with the receiving grooves (113), and at least part of the pressure plates (20) are received in the corresponding receiving grooves (113).
2. The isostatic press tool of claim 1, wherein, The tab clearance hole (13) is a blind hole.
3. The isostatic press tool of claim 1, wherein, The tab clearance groove (112) is a through groove in the extension direction of the tab. The isostatic pressure fixture also includes a sealing member (30). Each tab clearance hole (13) has a sealing groove (14) at one end away from the through hole (12). Each sealing groove (14) contains one sealing member (30).
4. The isostatic press tool of claim 3, wherein, Each of the frames (11) has a sealing sub-slot (114), and each sealing sub-slot (14) consists of two oppositely arranged sealing sub-slots (114).
5. The isostatic press tool of claim 1, wherein, The through hole (12) has a rectangular cross-section, and the tab clearance hole (13) is located on both sides opposite to the through hole (12).
6. The isostatic press tooling of any one of claims 1-5, wherein, The distance between the perimeter of the pressure plate (20) and the corresponding groove wall of the receiving groove (113) is L, 0.1mm≤L≤0.5mm.
7. The isostatic press tooling of any one of claims 1-5, wherein, The depth of the receiving groove (113) is greater than the thickness of the pressure plate (20).
8. The isostatic press tool of claim 7, wherein, The thickness difference of the body before and after static pressure is H1, and the difference between the depth of the receiving groove (113) and the thickness of the pressure plate (20) is H2, where H2 > H1.
9. An isostatic pressing apparatus, characterized by include: The isostatic pressure fixture as described in any one of claims 1-8; An isostatic press configured to pressurize six surfaces of the isostatic fixture containing the solid-state battery.
10. A battery production line, characterized in that, Including the isostatic pressure apparatus as described in claim 9.