Auxiliary device for uniformly coating composite positive electrode powder
By using a composite cathode powder uniform coating auxiliary device, and employing mechanized threading and coaxial design, the problems of uneven coating and ceramic layer damage were solved, thus achieving efficient production and stable performance of solid-state batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TONGXIANG FRONTIER NEW MATERIALS RES INST
- Filing Date
- 2025-04-17
- Publication Date
- 2026-05-08
AI Technical Summary
In existing technologies, it is difficult to control the force during the positive electrode powder coating process, resulting in uneven coating layers, which may damage the solid electrolyte ceramic layer and affect the performance of solid-state batteries.
A composite cathode powder uniform coating auxiliary device is adopted. Through a mechanized threaded screwing method, the coaxial design of the support base, battery mold core, composite cathode mold and locking component is used to ensure uniform coating of cathode powder and avoid damage to the ceramic layer.
It improves production efficiency and product quality stability, ensures the uniformity of the coating and battery performance, prevents damage to the ceramic layer, and features easy demolding and uniform pressure application, thus enhancing the operability and safety of the device.
Smart Images
Figure CN224217464U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of solid-state battery assembly auxiliary technology, specifically to an auxiliary device for uniform coating of composite cathode powder. Background Technology
[0002] During the assembly of solid-state batteries, solid electrolyte ceramic sheets are typically pre-pressed into the core of a battery mold. Then, positive electrode powder is sequentially coated onto both sides of the ceramic sheet, followed by the attachment of lithium indium metal negative electrode sheets. Generally, the current positive electrode powder coating process involves spreading composite positive electrode powder onto the solid electrolyte ceramic sheet, then manually spin-coating it using a pressure structure, followed by cold pressing to obtain the composite positive electrode layer.
[0003] Based on the above, the existing cathode powder coating process has the following problems:
[0004] 1. When spin coating is performed directly using a pressure structure, it is difficult to control the pressure, making it difficult to ensure that the positive electrode powder coating layer completely covers the surface of the solid electrolyte ceramic, as well as the uniformity of thickness and quality.
[0005] 2. If too much force is applied during spin coating, the pressed solid electrolyte ceramic layer may be damaged, further affecting the performance of the solid battery. Therefore, this utility model provides an auxiliary device for uniform coating of composite cathode powder. Utility Model Content
[0006] To address the shortcomings of existing technologies, this invention provides an auxiliary device for uniform coating of composite cathode powder. It solves the problems of difficulty in controlling the force when directly using a pressure structure for spin coating, making it difficult to ensure that the cathode powder coating layer completely covers the surface of the solid electrolyte ceramic, as well as the uniformity of thickness and quality, and the possibility that excessive force during spin coating may damage the pressed solid electrolyte ceramic layer, further affecting the performance of the solid-state battery.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a composite positive electrode powder uniform coating auxiliary device, comprising a support base, wherein the support base is provided with an auxiliary mechanism for uniformly coating the composite positive electrode powder, the auxiliary mechanism comprising:
[0008] The operating components include an inner cavity opened inside the support base, a battery mold core sliding inside the inner cavity, a first through cavity opened inside the battery mold core, a composite positive electrode mold provided on the lower end face of the support base, a second through cavity opened inside the composite positive electrode mold, and a long push rod provided inside the second through cavity.
[0009] The locking assembly includes second connecting blocks fixed on both sides of the composite positive electrode mold, and the side wall of the second connecting blocks is provided with a locking bracket that is rotatably connected by a rotating shaft.
[0010] Preferably, the inner diameter of the battery mold core is consistent with the inner diameter of the support base, and the fit tolerance is met.
[0011] Preferably, the lower edge of the support base is provided with a groove step, and the upper half of the composite positive electrode mold is provided with a boss, the depth of the groove step being consistent with the height of the boss in the upper half of the composite positive electrode mold.
[0012] Preferably, the height of the inner core of the battery mold is equal to the depth of the inner cavity, a first threaded groove is provided on the lower part of the inner wall of the second through cavity, a threaded ring is provided on the outer wall of the long push rod and is threadedly connected to the first threaded groove, a second threaded groove is provided on the upper inner wall of the second through cavity, and the second threaded groove is threadedly connected to the short push rod.
[0013] Preferably, the locking bracket has an L-shaped structure and is provided with bolts. Locking blocks are fixed on both sides of the support base, and the bolts and locking blocks are threadedly connected.
[0014] Preferably, the front and rear walls of the support base are fixed with positioning blocks, the positioning blocks have positioning holes inside, the front and rear walls of the composite positive electrode mold are fixed with first connecting blocks, the upper end of the first connecting blocks is fixed with a positioning rod, and the positioning rod matches the size of the positioning hole.
[0015] Beneficial effects
[0016] This invention provides an auxiliary device for uniformly coating composite positive electrode powder. Compared with the prior art, it has the following advantages:
[0017] Firstly, this invention achieves the coating of composite cathode powder through a mechanized threaded twisting method, which can significantly improve production efficiency compared to traditional manual coating methods. At the same time, due to the standardized and modular design of the device, the entire process is easier to repeat, which helps to achieve stable product quality in mass production. It avoids problems such as uneven powder distribution and loose coating layer that may occur in traditional coating methods, and improves the performance stability and consistency of the battery. It also has the characteristics of easy demolding and uniform pressure application, and has promotional value.
[0018] Secondly, the supporting base, battery mold core, composite positive electrode mold, long push rod, and short push rod of this utility model are coaxial, thereby ensuring the smooth transfer of the positive electrode powder coating layer from the composite positive electrode mold to the battery mold core. This achieves uniform coating of the positive electrode powder, avoiding problems such as difficulty in ensuring the coverage and uniformity of the positive electrode powder coating layer and damage to the solid electrolyte ceramic layer. It also avoids uneven force caused by pressure applied from different axes. The locking component design, including the L-shaped locking bracket and the connection between the bolt and the locking block, as well as the engagement of the positioning rod and the positioning hole, greatly enhances the operability and stability of the device. During the coating process, it can effectively fix the supporting base and the composite positive electrode mold, preventing misalignment or loosening caused by vibration or external force, ensuring the smooth progress of the coating process, and improving the safety and reliability of the entire device. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the locking connection structure between the support base and the composite positive electrode mold of this utility model;
[0021] Figure 3 This is a cross-sectional view of the connection structure between the support base and the composite positive electrode mold of this utility model;
[0022] Figure 4 This is a schematic diagram of the unfolded connection structure of the support base and the composite positive electrode mold of this utility model.
[0023] In the diagram: 1. Support base; 101. Locking block; 102. Positioning block; 103. Positioning hole; 2. Composite positive electrode mold; 201. First connecting block; 202. Positioning rod; 203. Second connecting block; 204. Locking bracket; 205. Bolt; 3. Battery mold inner core; 301. First through cavity; 4. Second through cavity; 401. First threaded groove; 402. Second threaded groove; 403. Long push rod; 404. Threaded ring; 5. Inner cavity; 6. Short push rod; 7. Groove step; 8. Boss. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figures 1-4This utility model provides a technical solution: an auxiliary device for uniformly coating composite positive electrode powder, including a support base 1, on which an auxiliary mechanism for uniformly coating composite positive electrode powder is provided, the auxiliary mechanism including:
[0026] The operating components include an inner cavity 5 opened inside the support base 1, a battery mold core 3 sliding inside the inner cavity 5, a first through cavity 301 opened inside the battery mold core 3, a composite positive electrode mold 2 provided on the lower end face of the support base 1, a second through cavity 4 opened inside the composite positive electrode mold 2, and a long push rod 403 provided inside the second through cavity 4.
[0027] The locking assembly includes a second connecting block 203 fixed on both sides of the composite positive electrode mold 2, and a locking bracket 204 rotatably connected to the side wall of the second connecting block 203 via a rotating shaft.
[0028] In a preferred embodiment, the diameter of the battery mold core 3 is consistent with the diameter of the inner cavity 5 of the support base 1 and meets the fitting tolerance. A groove step 7 is provided at the lower edge of the support base 1. A boss 8 is provided on the upper half of the composite positive electrode mold 2. The depth of the groove step 7 is consistent with the height of the boss 8 on the upper half of the composite positive electrode mold 2, so as to achieve a good connection between the support base 1 and the composite positive electrode mold 2. The height of the battery mold core 3 is equal to the depth of the inner cavity 5. A first threaded groove 401 is provided on the lower part of the inner wall of the second through cavity 4. A threaded ring 404 that is threadedly connected to the first threaded groove 401 is provided on the outer wall of the long push rod 403. A second threaded groove 402 is provided on the upper inner wall of the second through cavity 4. The second threaded groove 402 is threadedly connected to the short push rod 6.
[0029] Among them, the composite positive electrode mold 2 is a cylindrical ring. The diameter of the second through cavity 4 of the cylindrical ring is the same as the diameter of the first through cavity 301 of the battery mold core 3, so as to ensure that the positive electrode powder coating layer can be transferred after the two are connected. The two are used to transfer the coated powder positive electrode after they are connected. The long push rod 403 is used to form the positive electrode coating layer together with the short push rod 6 and the composite positive electrode mold 2. The diameter of the long push rod 403 is the same as the diameter of the second through cavity 4 of the composite positive electrode mold 2, so as to cooperate with the composite positive electrode mold 2 during the coating of the positive electrode layer. The length of the long push rod 403 is the sum of the height of the composite positive electrode mold 2 and the height of the battery mold core 3. The support base 1, the battery mold core 3, the composite positive electrode mold 2, the long push rod 403 and the short push rod 6 are coaxial and are assembled sequentially.
[0030] During the positive electrode powder coating process, the support base 1, the battery mold core 3, the composite positive electrode mold 2, the long push rod 403 and the short push rod 6 are coaxial, thereby ensuring the smooth transfer of the positive electrode powder coating layer from the composite positive electrode mold 2 to the battery mold core 3 and avoiding uneven force caused by pressure applied from different axes.
[0031] In a preferred embodiment, the locking bracket 204 has an L-shaped structure and is provided with bolts 205. Locking blocks 101 are fixed on both sides of the support base 1, and the bolts 205 are threadedly connected to the locking blocks 101. Positioning blocks 102 are fixed on the front and rear walls of the support base 1, and positioning holes 103 are opened inside the positioning blocks 102. First connecting blocks 201 are fixed on the front and rear walls of the composite positive electrode mold 2, and positioning rods 202 are fixed on the upper end of the first connecting blocks 201. The positioning rods 202 and positioning holes 103 are matched in size. When the groove step 7 and the boss 8 lock the battery mold core 3 into the inner cavity 5, the support base 1 and the composite positive electrode mold 2 are connected by the positioning rods 202 and 103. The positioning rod 202 engages with the positioning hole 103, then the locking bracket 204 is rotated to fit against the surface of the locking block 101, and then the bolt 205 is rotated to lock it in place. This is used to lock the connection between the support base 1 and the composite positive electrode mold 2. The locking component design includes the L-shaped locking bracket 204 and the bolt 205 connecting to the locking block 101, as well as the engagement of the positioning rod 202 with the positioning hole 103. This greatly enhances the operability and stability of the device. During the coating process, it can effectively fix the support base 1 and the composite positive electrode mold 2, preventing misalignment or loosening caused by vibration or external force, ensuring the smooth progress of the coating process, and also improving the safety and reliability of the entire device.
[0032] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
[0033] During operation, a certain amount of solid electrolyte powder is first weighed and poured into the inner core 3 of the battery mold. It is then pressed at 150 MPa to form a solid electrolyte layer. Next, the threaded ring 404 on the outer wall of the long push rod 403 is screwed into the second through-cavity 4 of the composite positive electrode mold 2 through the first threaded groove 401. The screwing distance should not be too long at this point, leaving some space for the composite positive electrode powder. Then, a certain mass of composite positive electrode powder is weighed and placed in the reserved space of the composite positive electrode mold 2, i.e., the remaining space in the second through-cavity 4. The short push rod 6 is then screwed into the second threaded groove 401. 02. Press the composite positive electrode powder coating layer into a compact shape, then remove the short push rod 6. Next, use the inner cavity 5, groove step 7, and boss 8 in the support base 1 to fix the battery mold core 3 in the inner cavity 5. Then, continue to screw the long push rod 403 to push the composite positive electrode powder coating layer into the first through cavity 301 of the battery mold core 3, and screw it forcefully to make the positive electrode powder coating layer adhere tightly to the surface of the solid electrolyte ceramic sheet. Finally, screw out the long push rod 403 and disconnect the support base 1 from the composite positive electrode mold 2 to complete the uniform coating of the composite positive electrode powder.
[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A composite positive electrode powder uniform coating auxiliary device, comprising a support base (1), characterized in that: The support base (1) is provided with an auxiliary mechanism for uniformly coating the composite positive electrode powder. The auxiliary mechanism includes: The operating components include an inner cavity (5) opened inside the support base (1), a battery mold core (3) sliding inside the inner cavity (5), a first through cavity (301) opened inside the battery mold core (3), a composite positive electrode mold (2) provided on the lower end face of the support base (1), a second through cavity (4) opened inside the composite positive electrode mold (2), and a long push rod (403) provided inside the second through cavity (4). The locking assembly includes a second connecting block (203) fixed on both sides of the composite positive electrode mold (2), and the side wall of the second connecting block (203) is provided with a locking bracket (204) rotatably connected by a rotating shaft.
2. The composite positive electrode powder uniform coating auxiliary device according to claim 1, characterized in that: The diameter of the inner core (3) of the battery mold is consistent with the diameter of the inner cavity (5) of the support base (1) and meets the fitting tolerance.
3. The composite positive electrode powder uniform coating auxiliary device according to claim 1, characterized in that: The lower edge of the support base (1) is provided with a groove step (7), and the upper part of the composite positive electrode mold (2) is provided with a boss (8). The depth of the groove step (7) is consistent with the height of the boss (8) of the upper part of the composite positive electrode mold (2).
4. The composite positive electrode powder uniform coating auxiliary device according to claim 1, characterized in that: The height of the inner core (3) of the battery mold is equal to the depth of the inner cavity (5). A first threaded groove (401) is provided on the lower part of the inner wall of the second through cavity (4). A threaded ring (404) that is threaded to the first threaded groove (401) is provided on the outer wall of the long push rod (403). A second threaded groove (402) is provided on the upper inner wall of the second through cavity (4). The second threaded groove (402) is threaded to the short push rod (6).
5. The composite positive electrode powder uniform coating auxiliary device according to claim 1, characterized in that: The locking bracket (204) has an L-shaped structure and is provided with bolts (205). Locking blocks (101) are fixed on both sides of the support base (1). The bolts (205) and the locking blocks (101) are threadedly connected.
6. The composite positive electrode powder uniform coating auxiliary device according to claim 1, characterized in that: The front and rear walls of the support base (1) are fixed with positioning blocks (102), and the positioning blocks (102) have positioning holes (103) inside. The front and rear walls of the composite positive electrode mold (2) are fixed with first connecting blocks (201), and the upper end of the first connecting blocks (201) is fixed with positioning rods (202). The positioning rods (202) match the size of the positioning holes (103).