Laminate assembly and cell formation cabinet
By designing the layer assembly, including the layer, pad, and limiting components, the problem of indentation during the formation of pouch cells was solved, achieving protection of the cell surface and performance improvement.
Patent Information
- Application Number
- CN202422802431.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-11-15
AI Technical Summary
In the existing technology, pouch cells are prone to developing indentations on the surface during the formation process, resulting in poor appearance.
The system employs a layered assembly, which includes a layer, a pad, and a limiting member. The layer is used to apply pressure, the pad contacts the surface of the battery cell, and the limiting member limits the vertical direction to prevent the battery cell carrier from contacting the pad and to prevent the pad from deforming or breaking.
This avoids the formation of indentations on the cell surface, improves the appearance quality and safety performance of the cell, and enhances the energy density and cycle performance of the cell.
Smart Images
Figure CN223471634U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of new energy, in particular to a layer plate assembly and a battery cell formation cabinet. BACKGROUND
[0002] Soft package batteries are the third generation of lithium batteries developed on the basis of original steel shell, aluminum shell and plastic shell batteries. They are widely favored by domestic and foreign users due to their advantages such as lighter, thinner, better safety performance, high appearance requirement, high energy density, stable discharge platform, excellent power performance, environmental protection and no pollution. Soft package battery products are therefore widely used in electric vehicles, mobile power sources, digital electronic products, smart wearable products, electric toys and many other fields.
[0003] The purpose of battery cell formation is to activate the active material in the battery cell and generate a dense solid electrolyte interface film (SEI film) on the anode surface to protect the entire chemical interface and improve the cycle performance and service life of the battery. In related technologies, the battery cell needs to be clamped and placed during formation to ensure that the surface of the battery cell main body is uniformly stressed and pressed.
[0004] However, the solution in the related art is prone to causing indentation on the surface of the battery cell, resulting in poor appearance of the battery cell. UTILITY MODEL CONTENT
[0005] To solve or partially solve the problems in the related art, the present application provides a layer plate assembly and a battery cell formation cabinet, which can avoid indentation on the surface of the battery cell.
[0006] The first aspect of the present application provides a layer plate assembly, comprising:
[0007] a layer plate for applying pressure to the surface of the battery cell;
[0008] a cushion layer attached to the layer plate for contacting the surface of the battery cell;
[0009] a limiting piece fixed to the layer plate and located on the side of the layer plate where the cushion layer is located, the limiting piece being used to limit the vertical direction of the battery cell carrier to avoid contact between the battery cell carrier and the cushion layer.
[0010] In an implementation manner, the limiting piece is in a strip shape, and is arranged along the length and / or width direction of the layer plate and is arranged away from the area for pressing the battery cell in the transverse direction.
[0011] In an implementation manner, the limiting piece is detachably connected with the layer plate.
[0012] In an implementation manner, the limiting piece is fixed to the layer plate by a fastener.
[0013] In an implementation, the fastener is a screw, and the screw is provided with at least two in the length direction of the limiting member.
[0014] In an implementation, the cushion layer is a flexible sheet material; or
[0015] The cushion layer is a paper material.
[0016] In an implementation, the limiting member is arranged along the side edge of the cushion layer, and the side edge of the cushion layer is clamped between the layer plate and the limiting member.
[0017] In an implementation, the cell carrier is an aging plate, and the aging plate comprises a substrate provided with a plurality of cell test sites for placing cells, and the cell test site is provided with a connecting assembly electrically connected with the cell.
[0018] The second aspect of the present application provides a cell formation cabinet, comprising:
[0019] a cabinet body; and
[0020] a plurality of layer plate assemblies as described in the first aspect above, the plurality of layer plate assemblies are arranged in the vertical direction in the cabinet body and are movable in the vertical direction, and the accommodation space for accommodating the cell carrier is formed between adjacent layer plate assemblies.
[0021] In an implementation, the layer plate of the layer plate assembly comprises an upper side and a lower side, and in the two adjacent layer plate assemblies, the lower side of the layer plate of the upper layer is used for arranging the cushion layer and the limiting member, and the upper side of the layer plate of the lower layer is used for supporting the cell carrier.
[0022] The technical solution provided by the present application can include the following beneficial effects:
[0023] The layer plate assembly provided by the present application comprises a layer plate, a cushion layer and a limiting member; the layer plate is used for applying pressure to the surface of the cell, the cushion layer is arranged on the layer plate and used for contacting the surface of the cell; the limiting member is fixed on the layer plate and located on the side of the layer plate where the cushion layer is located, and the limiting member is used for limiting the cell carrier in the vertical direction to avoid the contact between the cell carrier and the cushion layer. In this way, the protection of the cushion layer can be realized, the collision between the cell carrier and the cushion layer can be avoided, the deformation or damage of the cushion layer can be avoided, the good integrity and flatness of the cushion layer can be maintained, the pressure marks on the surface of the cell can be avoided, the appearance defect of the cell can be reduced or even avoided, and the yield rate and safety performance of the cell can be improved.
[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS
[0025] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and in which:
[0026] Figure 1 is a structural schematic diagram of a layer plate assembly according to an embodiment of the present application;
[0027] Figure 2 is a structural schematic diagram of an electric cell formation cabinet according to an embodiment of the present application.
[0028] Reference signs: 100, layer plate; 101, opening; 110, limiting member; 120, aging plate; 121, connecting assembly; 200, cabinet body; 210, guide rod; 220, driving mechanism; 230, pressure sensor; 240, spring assembly. DETAILED DESCRIPTION
[0029] Preferred embodiments of the present application will be described herein below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
[0030] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.
[0031] It is to be understood that the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It is to be further understood that the term "or" as used herein encompasses both exclusive and inclusive or unless otherwise indicated herein. It is to be understood that the terms "comprises", "comprising", "includes", "including" and "have" or "has" when used herein, specify the presence of stated features, integers, steps, operations, elements, components or members, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, members, or groups thereof.
[0032] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0033] Unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.
[0034] In related art, during formation, battery cells need to be clamped and placed to ensure uniform force and pressure on the surface of the cell body. However, these solutions can easily cause indentations on the cell surface, resulting in a poor appearance. To address this issue, embodiments of the present application provide a laminate assembly that prevents indentations on the cell surface.
[0035] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0036] Figure 1 It is a structural schematic diagram of a layer plate assembly shown in one embodiment of the present application.
[0037] See also Figure 1 The layer plate assembly provided in the present application includes a layer plate 100, a cushion layer (not shown) and a limiter 110; the layer plate 100 is used to apply pressure to the surface of the battery cell (not shown), and the cushion layer is attached to the layer plate 100 for contacting the surface of the battery cell; the limiter 110 is fixed to the layer plate 100 and is located on the side of the layer plate 100 where the cushion layer is located. The limiter 110 is used to limit the vertical direction of the battery cell carrier to prevent the battery cell carrier from contacting the cushion layer.
[0038] The plate assembly provided herein has a limiter 110 that vertically limits the cell carrier to prevent contact between the cell carrier and the cushioning layer on the surface of the plate 100, thereby protecting the cushioning layer and maintaining its integrity and flatness. This prevents indentations on the cell surface, reducing or even eliminating poor cell appearance. By enabling more precise control of cell surface indentations, the cell quality rate and safety performance can be improved.
[0039] In this embodiment, the battery cell is a soft package battery cell, and the battery cell carrier is an aging plate 120. The aging plate 120 includes a base plate, which is the basis of the aging plate and provides support and connection functions. The base plate is provided with a plurality of battery cell test sites for placing battery cells. The battery cell test site is provided with a connection assembly 121 electrically connected to the battery cell. The connection assembly includes a wire that connects electronic components and the tab of the battery cell to form a complete test circuit. The connection assembly 121 is also connected to the external test equipment through the wire. The aging plate 120 is used to simulate the real working environment and conditions of the battery cell, so that potential problems can be detected during the accelerated aging process, thereby ensuring the stability and reliability of the battery cell in actual use.
[0040] During the formation process, the aging plate 120 needs to be moved to the space area at the bottom of the layer plate 100, so that the layer plate 100 can exert pressure on the battery cells on the aging plate 120. The cushion layer is located between the layer plate 100 and the battery cell. The layer plate 100 contacts the battery cell through the cushion layer. Therefore, the cushion layer protects the contact surface of the layer plate 100 on the one hand to avoid contamination of the contact surface of the layer plate 100, and on the other hand can buffer the pressure of the layer plate 100 on the battery cell, so that the pressure distribution is more uniform, and the pressure marks on the surface of the battery cell are avoided.
[0041] Figure 1 The two layer plate assemblies are spaced apart in the vertical direction. The upper side of the layer plate 100 is used to place the aging plate 120, and the lower side of the layer plate 100 is used to attach the cushion layer and install the limiting piece 110. The aging plate is placed between the two layer plates. When the two layer plates 100 are close to each other, the upper layer plate 100 can exert pressure on the battery cells on the lower layer aging plate, and then perform formation on the battery cells under the pressure maintaining state.
[0042] In some embodiments, according to the actual situation, the layer plate 100 can be provided with a plurality of limiting pieces 110 in the transverse direction. The plurality of limiting pieces 110 are used to limit a plurality of aging plates 120, for example Figure 1 The layer plate in the above embodiment is provided with two groups of limiting pieces 110, which are used to limit three groups of aging plates 120.
[0043] In some embodiments, the length of the limiting piece 110 can be greater than the transverse width of the aging plate 120.
[0044] In this embodiment, the cushion layer is made of a flexible sheet material. The cushion layer is a consumable that can be detached from the layer plate 100. When the cushion layer is used for a long time and appears uneven, is contaminated or damaged, it is detached from the layer plate 100 and replaced with a new cushion layer.
[0045] In some embodiments, the cushion layer is a paper material, such as a paper sheet or a paper board with a certain thickness. The paper sheet or the paper board is attached and fixed to the lower surface of the layer plate 100.
[0046] In some embodiments, the limiting member 110 is in the form of a strip, and is arranged along the length and / or width direction of the layer plate 100 and in a region away from the pressing direction of the battery cell. In this way, the limiting member 110 can not only limit the aging plate 120 or protect the gasket, but also will not affect the pressure applied by the layer plate 100 to the battery cell.
[0047] In actual operation, when the aging plate 120 is moved into the space region below the layer plate 100 in the transverse direction, it may be inclined in the vertical direction, so that the aging plate 120 may contact or impact the gasket of the layer plate 100 above, causing the gasket to be broken or deformed. If the gasket is broken or deformed, since the gasket is directly in contact with the surface of the battery cell, when the layer plate 100 applies pressure to the surface of the battery cell through the gasket, the position where the gasket is broken or deformed will cause uneven pressure distribution, resulting in indentation on the surface of the battery cell. The indentation not only affects the appearance of the battery cell, but also affects the improvement of the energy density of the battery cell, and reduces the rate and cycle performance of the battery cell.
[0048] The scheme of the present application can block the aging plate 120 in the vertical direction when the aging plate 120 is moved into the space region below the layer plate 100 in the transverse direction, so as to avoid the contact between the aging plate 120 and the gasket. The gasket has good flatness, so that the pressure distribution on the surface of the battery cell is more uniform when the battery cell is formed, and indentation will not be generated on the surface of the battery cell. Moreover, it is beneficial to improve the energy density of the battery cell, and to improve the rate and cycle performance of the battery cell.
[0049] In some embodiments, the limiting member 110 is detachably connected to the layer plate 100. In this way, the limiting member 110 can be added to the existing layer plate 100, or the position of the limiting member 110 on the layer plate 100 can be adjusted.
[0050] In some embodiments, the limiting member 110 is arranged along the side edge of the gasket, and the side edge of the gasket is clamped between the layer plate 100 and the limiting member 110. In this way, the gasket is fixed to the layer plate 100 by the limiting member 110, so that the adhesion of the gasket on the surface of the layer plate 100 is more stable. When the gasket is replaced, the limiting member 110 is detached, the gasket is removed, and the new gasket is attached. Then, the limiting member 110 is fixed to the layer plate 100 again.
[0051] The scheme of the present application can fix the gasket by the limiting member 110, so that the stability of the gasket on the layer plate 100 is better, and the displacement of the gasket is avoided, thereby improving the service life of the gasket. On the other hand, the limiting member 110 can protect the gasket from being impacted by the aging plate 120, so that the service life of the gasket is further improved. Therefore, the replacement cycle of the gasket is greatly prolonged, which is beneficial to reduce the working steps, improve the work efficiency, and save the cost.
[0052] Figure 2 is a structural schematic diagram of a battery cell formation cabinet according to an embodiment of the present application.
[0053] Referring to Figure 2 The present application provides a battery cell formation cabinet, which comprises a cabinet body 200 and a plurality of layer plate assemblies according to any of the above embodiments, the plurality of layer plate assemblies are arranged in the vertical direction in the cabinet body 200 and are movable in the vertical direction, and the adjacent layer plate assemblies form a containing space for accommodating a battery cell carrier.
[0054] In this embodiment, the cabinet body 200 is provided with a driving mechanism 220 and a guide rod 210 on both sides, and the layer plate 100 of the plurality of layer plate assemblies is provided with a connecting hole at both ends, and the plurality of layer plate assemblies are connected with the guide rod 210 through the connecting holes, and when the driving mechanism 220 operates, the plurality of layer plate assemblies can be driven to move in the vertical direction, so that the adjacent layer plates 100 move close to or away from each other.
[0055] The layer plate 100 of the layer plate assembly comprises an upper side and a lower side, and in the adjacent two layer plate assemblies, the lower side of the upper layer plate 100 is used to set a cushion layer and a limiting piece 110, and an opening 101 for placing an aging plate 120 is formed between the upper and lower layer plates 100 in front of the cabinet body 200, and the aging plate 120 is placed on the lower layer plate 100 through the opening 101, and the upper side of the lower layer plate 100 is used to support the aging plate 120. When the adjacent two layer plate assemblies move close to each other, the upper layer plate 100 contacts the upper surface of the battery cell through the cushion layer, and then a predetermined size and a predetermined duration of pressure is applied to the battery cell, and after the pressure is applied, the layer plate 100 returns to the original position.
[0056] In this embodiment, the bottom of the cabinet body 200 is provided with a controller and a pressure sensor 230, the pressure sensor 230 is used to sense the pressure of the layer plate assembly and send the pressure to the controller, and the controller adjusts the operating state of the driving mechanism 220 according to the pressure information.
[0057] In some embodiments, the cabinet body 200 further comprises a spring assembly 240 arranged at the bottom of the plurality of layer plate assemblies, the pressure sensor 230 is connected with the spring assembly 240, the spring assembly 240 supports or buffers the plurality of layer plate assemblies, and the operating stability of the plurality of layer plate assemblies is improved.
[0058] The scheme provided by the present application, since the layer plate assembly of the battery cell formation cabinet comprises a limiting piece 110, the limiting piece 110 limits the battery cell carrier in the vertical direction, so as to avoid the battery cell carrier contacting the cushion layer, and then the protection of the cushion layer is realized, the battery cell carrier collides with the cushion layer, which causes the deformation or damage of the cushion layer, so that the cushion layer maintains good integrity and flatness, and then the pressure marks on the surface of the battery cell are avoided, and the appearance defect of the battery cell is reduced or even avoided.
[0059] Having described various embodiments of the application, the foregoing description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations of the described embodiments are possible in light of the above teachings. The choice of words in this document is intended to convey the best of the applicant's current knowledge of the principles, practical applications, or improvements to the art, and to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A laminate assembly, characterized by The layer plate is used to apply pressure to the surface of the battery cell. The cushion layer is attached to the layer plate and is in contact with the surface of the battery cell. The limiting member is fixed to the layer plate and is located on the side of the layer plate where the cushion layer is located. The limiting member is used to limit the vertical direction of the battery cell carrier to avoid contact between the battery cell carrier and the cushion layer.
2. The layer plate assembly according to claim 1, wherein: The limiting member is in the form of a strip, which is arranged along the length and / or width direction of the layer plate and is arranged in the transverse direction away from the area that compresses the battery cell.
3. The layer plate assembly according to claim 1, wherein: The limiting member is detachably connected to the layer plate.
4. The layer plate assembly according to claim 1, further comprising a fastener, and the limiting member is fixed to the layer plate by the fastener.
5. The layer plate assembly according to claim 4, wherein: The fastener is a screw, and at least two screws are arranged in the length direction of the limiting member.
6. The layer plate assembly according to claim 1, wherein: The cushion layer is a flexible sheet material; or The cushion layer is a paper material.
7. The layer plate assembly according to claim 1, wherein: The limiting member is arranged along the side edge of the cushion layer, and the side edge of the cushion layer is clamped between the layer plate and the limiting member.
8. The layer plate assembly according to claim 1, wherein: The battery cell carrier is an aging plate, and the aging plate comprises a base plate provided with a plurality of battery cell test sites for placing battery cells, and the battery cell test site is provided with a connection assembly electrically connected to the battery cell. The cabinet body; and 9. An electrochemical cell formation tank, characterized by, A plurality of layer plate assemblies according to any one of claims 1-8 are arranged in the vertical direction in the cabinet body and are movable in the vertical direction, and the accommodation space for accommodating the battery cell carrier is formed between adjacent layer plate assemblies.
10. The battery cell formation cabinet according to claim 9, wherein: The layer plate of the layer plate assembly comprises an upper side and a lower side, and in two adjacent layer plate assemblies, the lower side of the layer plate of the upper layer plate is used to arrange the cushion layer and the limiting member, and the upper side of the layer plate of the lower layer plate is used to support the battery cell carrier.