Battery cell formation plate and battery cell formation cabinet
By setting buffer pads and corrosion-resistant pads on the substrate, the problem of layer corrosion during the formation of pouch cells is solved, improving the thickness consistency and appearance quality of the cells after formation, and ensuring the stability and safety of the cells.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HIGHPOWER TECH CO LTD
- Filing Date
- 2025-01-23
- Publication Date
- 2026-06-16
AI Technical Summary
During the formation process of pouch cells, the layer assembly is easily corroded by the electrolyte, resulting in surface deformation or unevenness, and poor appearance, which affects the thickness consistency and appearance yield of the cells after formation.
A first pad is placed on the substrate for buffering, and a second pad with acid and alkali resistance is placed on its back to prevent electrolyte corrosion. Combined with a frame and magnetic components, it ensures convenient installation and stability. High temperature resistant, elastic deformation and insulating materials are used as pad materials to enhance the bonding force and stability between the cell and the formation board.
It improves the thickness consistency and appearance yield of the battery cells after formation, avoids appearance defects such as dents, bumps, and arching deformation, and enhances the stability and safety of the battery cells during the formation process.
Smart Images
Figure CN224366893U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of new energy technology, and in particular to cell formation boards and cell formation cabinets. Background Technology
[0002] Soft-pack batteries are the third generation of lithium batteries developed from the original steel-cased, aluminum-cased, and plastic-cased batteries. They are widely favored by users both domestically and internationally due to their advantages such as being lighter, thinner, having better safety performance, meeting high aesthetic requirements, high energy density, stable discharge platform, excellent power performance, and being environmentally friendly and pollution-free. Soft-pack batteries are therefore widely used in electric vehicles, power banks, digital electronic products, smart wearable products, electric toys, and many other fields.
[0003] The purpose of cell formation is to activate the active materials within the cell and generate a dense solid electrolyte interphase (SEI) film on the anode surface to protect the entire chemical interface and improve the battery's cycle performance and lifespan. In related technologies, during the formation of pouch cells, the cells need to be clamped to ensure uniform force and pressure on the cell's surface.
[0004] However, in related technologies, during the formation of pouch cells, the layer assemblies used to apply pressure to the cells are often easily corroded by the electrolyte of the cells, causing deformation or unevenness on the surface of the layer assemblies. After formation, the surface of the cells is prone to appearance defects such as bulges, dents, arching deformation, or local overthickness. Utility Model Content
[0005] To address or partially address the problems existing in the related technologies, this application provides a cell formation board and a cell formation cabinet, which can improve the thickness consistency and appearance yield of the cells after formation.
[0006] The first aspect of this application provides a cell formation board, comprising:
[0007] A substrate used to apply pressure to the surface of the battery cell;
[0008] A first pad layer is disposed on the surface of the substrate facing the battery cell, and the first pad layer is used to buffer when the substrate applies pressure to the surface of the battery cell.
[0009] The second pad is disposed on the surface of the first pad away from the substrate. The second pad is made of a material with acid and alkali resistance to prevent the electrolyte from corroding the first pad.
[0010] In one implementation, the first pad is detachably attached to the surface of the substrate facing the battery cell.
[0011] The second pad is bonded or coated on the surface of the first pad away from the substrate.
[0012] In one implementation, a frame is further included, wherein the first padding layer is disposed in the middle of the frame, and the edge of the first padding layer is connected to the frame;
[0013] The frame is provided with a magnetic component, which is used to attract the substrate.
[0014] In one implementation, the first pad is made of a material with high temperature resistance, elastic deformation properties and insulation properties.
[0015] In one implementation, the first pad is a first coating applied to the surface of the substrate facing the battery cell.
[0016] The second pad is a second coating applied to the first pad away from the surface of the substrate.
[0017] In one implementation, the first pad is made of silicone.
[0018] In one implementation, the material of the second pad is at least one of PE, PTFE, PVDF, PEEK, CFRP, epoxy resin, or polyurethane.
[0019] In one implementation, the thickness of the second padding layer is 0.5mm to 3mm; or,
[0020] The thickness of the first pad layer is 0.03mm to 2mm.
[0021] In one implementation, the third pad is attached to the surface of the second pad;
[0022] A limiting member is fixed to the substrate. The limiting member is used to limit the position of the cell carrier to prevent the cell carrier from contacting the third pad layer.
[0023] A second aspect of this application provides a cell formation cabinet, comprising:
[0024] Cabinet; and
[0025] As described in the first aspect above, the plurality of battery cell formation boards are arranged at intervals in the vertical direction within the cabinet and are movable in the vertical direction, with adjacent battery cell formation boards forming a receiving space for accommodating battery cell carriers.
[0026] The technical solution provided in this application may include the following beneficial effects:
[0027] The battery cell formation board provided in this application has a first pad layer on the surface of the substrate facing the battery cell. The first pad layer is used to buffer when the substrate applies pressure to the surface of the battery cell. This can not only make the force on the surface of the battery cell uniform or consistent, but also enhance the bonding force between the battery cell and the formation board, thereby improving the stability of the battery cell during the formation process. The second pad layer can protect the first pad layer and prevent the first pad layer from deforming or becoming uneven due to electrolyte corrosion. This ensures that the surface of the battery cell will not have defects such as dents, arching, deformation or excessive thickness after formation, thereby improving the thickness consistency and appearance yield of the battery cell after formation.
[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0029] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.
[0030] Figure 1 This is a cross-sectional schematic diagram of a cell formation board shown in one embodiment of this application;
[0031] Figure 2 This is a schematic diagram of the structure of the first pad layer of the cell formation board shown in one embodiment of this application;
[0032] Figure 3 This is a schematic diagram of the structure of a cell formation cabinet shown in one embodiment of this application.
[0033] Reference numerals: 100, cell formation board; 110, substrate; 120, first pad; 130, second pad; 121, frame; 122, magnetic component; 101, accommodating space; 102, aging board; 103, limiting component; 200, cabinet; 210, guide rod; 220, drive mechanism; 230, pressure sensor; 240, spring assembly. Detailed Implementation
[0034] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.
[0035] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0036] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0037] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.
[0038] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 application according to the specific circumstances.
[0039] In related technologies, during the formation of pouch cells, the layer assemblies used to apply pressure to the cells are often easily corroded by the electrolyte of the cells, causing deformation or unevenness on the surface of the layer assemblies. After formation, the surface of the cells is prone to appearance defects such as bulges, dents, arching deformation, or local overthickness.
[0040] To address the aforementioned issues, this application provides a cell formation board that can improve the thickness consistency and appearance yield of the formed cells.
[0041] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.
[0042] Figure 1 This is a schematic diagram of the structure of a cell formation board shown in one embodiment of this application.
[0043] See Figure 1 This application provides a battery cell formation board 100, which includes a substrate 110, a first pad 120 and a second pad 130. The substrate 110 is used to apply pressure to the surface of the battery cell. The first pad 120 is disposed on the surface of the substrate 110 facing the battery cell and is used to buffer when the substrate applies pressure to the surface of the battery cell. The second pad 130 is disposed on the surface of the first pad 120 away from the substrate 110 and is used to prevent the electrolyte from corroding the first pad 120.
[0044] The battery cell formation board 100 provided in this application has a surface of the substrate 110 facing the battery cell side (e.g., Figure 1 A first pad 120 is provided on the lower surface of the substrate 110. The first pad 120 is used to buffer the pressure applied by the substrate to the surface of the cell. In this way, the first pad 120 can not only make the force on the surface of the cell uniform or consistent, but also enhance the bonding force between the cell and the cell formation plate 100, thereby improving the stability of the cell during the formation process. The second pad can protect the first pad 120, preventing the first pad 120 from being deformed or uneven due to electrolyte corrosion. This ensures that the surface of the cell will not have defects such as dents, arching, deformation or excessive thickness after formation, thereby improving the thickness consistency and appearance yield of the cell after formation.
[0045] In some embodiments, the first pad 120 is detachably attached to the surface of the substrate 110 facing the battery cell, thus facilitating the replacement of the first pad 120. Specifically, the first pad 120 can be attached to the substrate 110 by adhesive or magnetic attraction.
[0046] In some embodiments, the second pad 130 is bonded or coated on the surface of the first pad 120 away from the substrate 110, such that the second pad 130 and the first pad 120 form an integral component, and then the integral component is detachably attached to the substrate 110.
[0047] Figure 2 This is a schematic diagram of the structure of the first pad layer of the cell formation board shown in one embodiment of this application.
[0048] See Figure 2In some embodiments, to enable the first pad 120 to be detachable, a frame 121 is also provided. The first pad 120 is arranged in the middle of the frame 121, and the edge of the first pad 120 is connected to the frame 121. A magnetic element 122 is provided on the frame 121 for adsorption with the substrate 110. The frame can keep the first pad 120 flat, making the installation of the first pad 120 on the substrate 110 more convenient.
[0049] In some embodiments, the frame 121 can be made of metal. The frame 121 is misaligned with the battery cell in the vertical direction to prevent damage to the battery cell when the substrate is pressed down. The magnetic component 122 can be a magnet, which is embedded in the frame 121. Since the substrate 110 is made of metal, the frame 121 can be attracted to the substrate 110 by the attraction force of the magnet.
[0050] In some embodiments, the material of the first pad 120 has elastic deformation properties. These properties reduce the mechanical stress on the battery cell during the formation process, preventing damage from external forces and ensuring uniformity or consistency of stress on the cell surface. Furthermore, the material of the first pad 120 has high-temperature resistance, allowing it to maintain stable performance under high-temperature conditions during formation. Simultaneously, the material of the first pad 120 has insulating properties, providing insulation between the battery cell and the substrate 110 and enhancing formation safety.
[0051] In some embodiments, the first pad 120 is made of silicone, a glassy substance composed of silicon dioxide molecules with a highly porous molecular structure. This structure allows the silicone to absorb and disperse the impact and vibration of the battery cell during pressure application. When the battery cell is under pressure, the silicone coating can deform, thereby absorbing some energy and buffering the pressure on the substrate 110.
[0052] In some embodiments, the material of the first pad 120 may be liquid silicone rubber (LSR), modified silicone rubber, silicone resin, silicone sealant, etc. The above materials have flexibility and elasticity, good resistance to acids, alkalis, oils and solvents, can maintain stable performance in a temperature range of -60°C to 250°C, and have good electrical insulation properties.
[0053] It is worth noting that the first pad 120 is not limited to the material of the first pad 120 described above. In other embodiments, the second pad can also be made of other materials with insulation properties, elastic deformation properties and high temperature resistance properties.
[0054] In some embodiments, the second pad 130 is made of a material with acid and alkali resistance and thermal stability. Specifically, the anti-corrosion coating is made of at least one of PE (Polyethylene), PTFE (Polytetrafluoroethylene), PVDF (Polyvinylidene Fluoride), PEEK (Polyetheretherketone), CFRP (Carbon Fiber Reinforced Polymer), epoxy resin, or polyurethane.
[0055] In this application, the material of the second pad 130 has good chemical stability and excellent corrosion resistance to most acids, alkalis, salts, and other chemical substances, making it less prone to chemical reactions that could lead to corrosion. Therefore, the second pad 130 isolates the buffer coating from the corrosive environment of the electrolyte, preventing corrosion of the buffer coating by the electrolyte, maintaining the stability of the buffer coating's performance, and ensuring that no defects such as bumps, dents, arching deformation, or excessive thickness appear on the surface of the battery cell after formation. This, in turn, improves the thickness consistency and appearance yield of the battery cell after formation.
[0056] In some embodiments, the thickness of the second pad 130 is less than the thickness of the first pad 120. Specifically, the thickness of the second pad 130 is 0.5mm to 3mm, for example, 0.5mm, 0.6mm, 0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.2mm, 2.5mm, 2.8mm, or 3mm; and the thickness of the first pad 120 is 0.03-2mm, for example, 0.03mm, 0.08mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, or 2.0mm.
[0057] In some embodiments, the first pad 120 is a first coating layer applied to the surface of the substrate 110 facing the battery cell, and the second pad 130 is a second coating layer applied to the surface of the first pad 120 away from the substrate 110. That is, the first pad 120 is disposed on the surface of the substrate 110 by coating, for example, by dissolving or dispersing the material of the first pad 120 in a solvent, and then uniformly coating the coating material onto the surface of the substrate 110 by coating. After the coating material cures, it can firmly adhere to the surface of the substrate 110. The second pad 130 is also disposed on the surface of the second pad 130 by coating, and after the material of the second pad 130 cures, it can firmly adhere to the surface of the buffer coating.
[0058] See Figure 3In some embodiments, the cell formation board 100 further includes a third pad (not shown) and a limiting member 103. The third pad is attached to the surface of the second pad 130 away from the first pad 120 and is used to contact the surface of the cell. In some embodiments, the third pad is made of a flexible sheet material and is removable from the shelf as a consumable. For example, it is a piece of paper or cardboard of a certain thickness, which is attached and fixed to the lower surface of the shelf. When the third pad becomes uneven, contaminated, or damaged after long-term use, it is removed from the shelf and replaced with a new pad.
[0059] In some embodiments, the cell formation board 100 further includes a limiting member 103, which is fixedly mounted on the substrate 110 and located on the side of the substrate 110 where the third pad layer is located. The limiting member 103 is used to limit the vertical movement of the cell carrier to prevent the cell carrier from contacting the pad layer. The limiting member 103 can limit the vertical movement of the cell carrier to prevent the cell carrier from contacting the third pad layer, thereby protecting the third pad layer and ensuring that the third pad layer maintains good integrity and flatness. This prevents indentations on the cell surface and reduces or even eliminates defects in the cell's appearance. Because it enables more precise control over indentations on the cell surface, it can improve the cell yield and enhance the cell's safety performance.
[0060] In some embodiments, the limiting member 103 is strip-shaped and is disposed along the length and / or width direction of the substrate 110, and is disposed laterally away from the area where the battery cell is pressed. With this arrangement, the limiting member 103 can not only limit the aging board 102, or protect the first, second and third pads, but also does not affect the pressure applied by the substrate 110 to the battery cell.
[0061] The above describes the cell formation process of this application. Accordingly, this application also provides a cell formation cabinet. See also... Figure 3 The formation cabinet includes a cabinet body 200 and a plurality of cell formation boards 100 as described in the above embodiment. The plurality of cell formation boards 100 are arranged at intervals in the vertical direction within the cabinet body 200 and are movable in the vertical direction. An accommodating space 101 for accommodating cell carriers is formed between adjacent cell formation boards 100.
[0062] In this embodiment, the battery cell used for formation is a pouch cell, and the battery cell carrier is an aging board 102.
[0063] The cabinet 200 is provided with a drive mechanism 220 and a guide rod 210 on both sides. The two ends of the shelves of the battery cell forming boards 100 are provided with connection holes. The battery cell forming boards 100 are connected to the guide rod 210 through the connection holes. When the drive mechanism 220 is running, it can drive the battery cell forming boards 100 to move in the vertical direction, so that the adjacent shelves are closer to each other or further away from each other.
[0064] The cell formation board 100 includes an upper side and a lower side. In two adjacent cell formation boards 100, the lower side of the upper cell formation board is used to set a first pad 120 and a second pad 130. An opening is formed between the upper and lower cell formation boards 100 in front of the cabinet 200 for placing an aging board 102. The aging board 102 is placed on the upper side of the lower cell formation board 100 through this opening. The upper side of the lower cell formation board 100 is used to support the aging board 102. When two adjacent cell formation boards 100 approach each other, the side of the upper cell formation board 100 with the first pad 120 and the second pad 130 contacts the upper surface of the cell, thereby applying a pressure of a predetermined magnitude and a predetermined duration to the cell. After the pressure is applied, each cell formation board 100 returns to its original position.
[0065] In this embodiment, a controller and a pressure sensor 230 are provided at the bottom of the cabinet 200. The pressure sensor 230 is used to sense the pressure of the battery cell formation board 100 and send the pressure to the controller. The controller adjusts the operating state of the drive mechanism 220 according to the pressure information. In some embodiments, the cabinet 200 also includes a spring assembly 240 disposed at the bottom of several battery cell formation boards 100. The pressure sensor 230 is connected to the spring assembly 240, and the spring assembly 240 supports or buffers the several battery cell formation boards 100, thereby improving the operating stability of the several battery cell formation boards 100.
[0066] The cell formation cabinet provided in this application has a first pad 120 on the surface of the substrate 110 of the cell formation board 100 facing the cell. The first pad 120 can make the surface of the cell uniform or consistent with the force. The second pad can protect the first pad 120, prevent the electrolyte of the cell from corroding the first pad 120, and prevent the first pad 120 from deforming or becoming uneven due to electrolyte corrosion. This ensures that the surface of the cell will not have defects such as dents, bulges, arching deformation or excessive thickness after formation, thereby improving the thickness consistency and appearance yield of the cell after formation.
[0067] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A cell formation board, characterized in that, include: A substrate used to apply pressure to the surface of the battery cell; A first pad layer is disposed on the surface of the substrate facing the battery cell, and the first pad layer is used to buffer when the substrate applies pressure to the surface of the battery cell. The second pad is disposed on the surface of the first pad away from the substrate. The second pad is made of a material with acid and alkali resistance to prevent the electrolyte from corroding the first pad.
2. The cell formation board according to claim 1, characterized in that: The first pad is detachably attached to the surface of the substrate facing the battery cell. The second pad is bonded or coated on the surface of the first pad away from the substrate.
3. The cell formation board according to claim 1, characterized in that: It also includes a frame, wherein the first padding layer is disposed in the middle of the frame and the edge of the first padding layer is connected to the frame; The frame is provided with a magnetic component, which is used to attract the substrate.
4. The cell formation board according to claim 1, characterized in that: The first pad is made of a material with high temperature resistance, elastic deformation properties and insulation properties.
5. The cell formation board according to claim 1, characterized in that: The first pad layer is a first coating applied to the surface of the substrate facing the battery cell. The second pad is a second coating applied to the first pad away from the surface of the substrate.
6. The cell formation board according to claim 1, characterized in that: The first pad is made of silicone.
7. The cell formation board according to claim 1, characterized in that: The material of the second pad is one of PE, PTFE, PVDF, PEEK, CFRP, epoxy resin, or polyurethane.
8. The cell formation board according to claim 1, characterized in that: The thickness of the second padding layer is 0.5mm to 3mm; or, The thickness of the first pad layer is 0.03mm to 2mm.
9. The cell formation board according to claim 1, characterized in that, Also includes: The third padding layer is attached to the surface of the second padding layer; A limiting member is fixed to the substrate. The limiting member is used to limit the position of the cell carrier to prevent the cell carrier from contacting the third pad layer.
10. A cell formation cabinet, characterized in that, include: Cabinet; as well as The plurality of battery cell formation boards as described in any one of claims 1-9, wherein the plurality of battery cell formation boards are arranged at intervals in the vertical direction within the cabinet and are movable in the vertical direction, and an accommodating space for accommodating battery cell carriers is formed between adjacent battery cell formation boards.