An insulating frame, a mold and a solid-state battery cell for the solid-state battery cell

Abstract

The utility model discloses an insulation frame, mould and solid state electric core for solid state electric core. The insulation frame includes first insulation piece and second insulation piece, and the second insulation piece is spliced with the first insulation piece along the thickness direction of the positive pole piece to form a frame type structure, and the area surrounded by the frame type structure is used for accommodating the positive pole piece, and the positive pole lug can pass through the splicing gap between the first insulation piece and the second insulation piece and go out of the insulation frame, and the first insulation piece and the second insulation piece are all injection molded through the mould. The manufacture of the insulation frame for solid state electric core has higher efficiency, and is beneficial to the improvement of the manufacture efficiency of the solid state electric core.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an insulating frame, mold, and solid-state battery cell for use in solid-state battery cells. Background Technology

[0002] Solid-state batteries are a new type of battery that uses a solid electrolyte instead of the separator and liquid electrolyte in traditional liquid batteries. Compared to liquid batteries, solid-state batteries have advantages such as higher energy density, better safety, greater flexibility, and smaller size, and are one of the future directions of battery technology development.

[0003] Solid-state battery cells are typically manufactured using a stacking process. During the manufacturing of solid-state cells, insulating frames are usually provided at the edges of the electrodes or solid electrolyte to prevent the electrodes from drooping.

[0004] In related technologies, insulating frames are typically fabricated using a dispensing method. This involves a dispensing structure slowly moving around the edge of the electrode or solid electrolyte to form an insulating frame after the adhesive cures. However, the dispensing structure needs to move around the edge of the electrode or solid electrolyte, resulting in a long distance and slow speed, which is detrimental to improving the efficiency of cell manufacturing. Utility Model Content

[0005] This application discloses an insulating frame, a mold, and a solid-state battery cell, which can effectively improve the efficiency of manufacturing the insulating frame and thus improve the manufacturing efficiency of the solid-state battery cell.

[0006] To achieve the above objectives, in a first aspect, embodiments of this application disclose an insulating frame for a solid-state battery cell, the solid-state battery cell comprising a positive electrode sheet and a positive electrode tab electrically connected to each other, the insulating frame comprising:

[0007] First insulating component;

[0008] The second insulating component is spliced ​​with the first insulating component along the thickness direction of the positive electrode sheet to form a frame structure. The area enclosed by the frame structure is used to accommodate the positive electrode sheet. The positive electrode tab can pass through the insulating frame through the splicing gap between the first insulating component and the second insulating component. Both the first insulating component and the second insulating component are injection molded.

[0009] Optionally, the first insulating component includes a first splicing frame, and the second insulating component includes a second splicing frame. The first splicing frame and the second splicing frame are spliced ​​along the axial direction of the first splicing frame, and the inner contours of the first splicing frame and the inner contours of the second splicing frame have the same size and shape, and the outer contours of the first splicing frame and the outer contours of the second splicing frame have the same size and shape.

[0010] Optionally, the first insulating member is a square frame structure, and the first insulating member includes a first frame edge, a second frame edge, a third frame edge and a fourth frame edge connected in sequence.

[0011] The second insulating component is a square frame structure with an opening on one side. The second insulating component includes a fifth frame edge, a sixth frame edge, and a seventh frame edge. The sixth frame edge is connected between the fifth frame edge and the seventh frame edge. Along the axial direction of the square frame structure, the fifth frame edge, the sixth frame edge, and the seventh frame edge are respectively spliced ​​with the second frame edge, the third frame edge, and the fourth frame edge. Along the axial direction of the square frame structure, the sum of the thicknesses of the fifth frame edge and the second frame edge, the sum of the thicknesses of the sixth frame edge and the third frame edge, and the sum of the thicknesses of the seventh frame edge and the fourth frame edge are all consistent with the thickness of the first frame edge.

[0012] Optionally, the first insulating member is a square frame structure. The first insulating member includes a first frame edge, a second frame edge, a third frame edge and a fourth frame edge connected in sequence. The first frame edge has a first surface and a second surface that are opposite to each other along the axial direction of the square frame structure. A strip-shaped notch is provided on the first surface, and the strip-shaped notch connects the inner side and the outer side of the square frame structure.

[0013] The first insulating element is a strip structure that matches the strip-shaped notch, and the strip structure is embedded in the strip-shaped notch.

[0014] Secondly, embodiments of this application also disclose a mold for manufacturing an insulating frame for a solid-state battery cell as described in any one of the first aspects, the mold comprising:

[0015] A first mold, the first mold being used for injection molding the first insulating component;

[0016] The second mold is used for injection molding the second insulating component.

[0017] Optionally, the first mold has a first cavity that matches the first insulating member, the first cavity extending through one side surface of the first mold along the axial direction of the frame structure to form a first demolding opening;

[0018] The second mold has a second cavity that matches the second insulating member, the second cavity extending through one side surface of the second mold along the axial direction of the frame structure to form a second demolding opening.

[0019] Optionally, both the first mold and the second mold are square molds, and the inner contours of the first mold and the second mold have the same size and shape, as do the outer contours of the first mold and the second mold.

[0020] Optionally, the first mold has two long side frames arranged opposite to each other and a plurality of first injection ports communicating with the first cavity. The plurality of first injection ports are respectively arranged on the two long side frames, and the number of first injection ports arranged on the two long side frames is equal and their positions are opposite.

[0021] Optionally, the long frame has a first surface, a second surface, and an outer surface connected between the first surface and the second surface, which are arranged opposite to each other along the axial direction of the frame structure. A portion of the first demolding opening is located on the first surface, and a plurality of the first liquid injection ports are located on the second surface or on the outer surface.

[0022] Optionally, the first mold is a transparent mold, and / or the second mold is a transparent mold.

[0023] Optionally, the roughness of the cavity wall of the first mold is 0.1 μm to 0.8 μm, and / or the roughness of the cavity wall of the second mold is 0.1 μm to 0.8 μm.

[0024] Thirdly, embodiments of this application also disclose a solid-state battery cell, comprising:

[0025] Negative electrode plate;

[0026] A positive electrode sheet and a negative electrode sheet are arranged along the thickness direction of the positive electrode sheet. The area of ​​the positive electrode sheet is smaller than the area of ​​the negative electrode sheet. Along the thickness direction of the positive electrode sheet, the projection of the positive electrode sheet onto the negative electrode sheet is located within the negative electrode sheet. The positive electrode sheet is electrically connected to the positive electrode tab.

[0027] A solid electrolyte, along the thickness direction of the positive electrode, is located between the negative electrode and the positive electrode, and on the side of the positive electrode away from the negative electrode;

[0028] The insulating frame described in any one of the first aspects is arranged around the periphery of the positive electrode sheet and connected between the two solid electrolytes, and the positive electrode tab can pass through the insulating frame through the splicing gap between the first insulating member and the second insulating member.

[0029] Optionally, along the thickness direction of the positive electrode sheet, the difference between the size of the insulating frame and the thickness of the positive electrode sheet is -0.5μm to 0.5μm.

[0030] Compared with the prior art, this application has at least the following beneficial effects:

[0031] In this application, both the first and second insulating components are injection molded. During the fabrication of the insulating frame, the mold is placed on the solid electrolyte, positioned, and then glue is injected into the mold to form the first and second insulating components. This operation is simple and quick. In other words, firstly, only one positioning of the mold is required to ensure the insulating frame meets the required position, simplifying the manufacturing process, reducing the difficulty of manufacturing the insulating frame, and improving manufacturing efficiency. Secondly, the glue injection structure does not need to move along the periphery of the solid-state battery; glue can be injected into the mold through the injection hole, making the operation simple, convenient, and efficient. Furthermore, the resulting insulating frame has stable dimensions, facilitating mass production and reducing costs. Thirdly, there is no need to set up a structure to detect the movement trajectory of the glue injection structure, simplifying the structure of solid-state cell fabrication and saving costs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a solid-state battery cell provided in an embodiment of this application;

[0034] Figure 2 This is a schematic diagram of the structure of an insulating frame for a solid-state battery cell provided in an embodiment of this application;

[0035] Figure 3 This is a perspective view of the first and second insulating components provided in the embodiments of this application;

[0036] Figure 4 This is a perspective view of the second type of first insulating member and second insulating member provided in the embodiments of this application;

[0037] Figure 5 This is a perspective view of the third type of first insulating member and second insulating member provided in the embodiments of this application;

[0038] Figure 6 This is a schematic diagram of the structure of a mold provided in an embodiment of this application;

[0039] Figure 7 This is a schematic diagram of another mold structure provided in an embodiment of this application;

[0040] Figure 8 This is a perspective view of the first mold and the second mold provided in the embodiments of this application;

[0041] Figure 9 This is a perspective view of the second type of first mold and second mold provided in the embodiments of this application;

[0042] Figure 10 This is a perspective view of the third type of first mold and second mold provided in the embodiments of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1-Insulating frame; 11-First insulating component; 111-First frame edge; 1111-Strip notch; 112-Second frame edge; 113-Third frame edge; 114-Fourth frame edge; 12-Second insulating component; 121-Fifth frame edge; 122-Sixth frame edge; 123-Seventh frame edge;

[0045] 2-Negative electrode plate;

[0046] 3-Negative electrode tab;

[0047] 4- Positive electrode sheet;

[0048] 5-Positive electrode tab;

[0049] 6-Solid electrolyte;

[0050] 7- Mold; 71- First mold; 711- First cavity; 7111- First cavity segment; 7112- Second cavity segment; 7113- Third cavity segment; 7114- Fourth cavity segment; 712- First demolding opening; 713- Long frame; 714- First injection port; 72- Second mold; 721- Second cavity; 7211- Fifth cavity segment; 7212- Sixth cavity segment; 7213- Seventh cavity segment; 722- Second demolding opening; 723- Second injection port;

[0051] 10-Solid-state battery cells. Detailed Implementation

[0052] 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.

[0053] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0054] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0055] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0056] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0057] In view of the technical problems described in the background art, this application discloses an insulating frame, a mold, and a solid-state battery cell, which can effectively improve the efficiency of manufacturing the insulating frame and facilitate the improvement of the manufacturing efficiency of the solid-state battery cell.

[0058] The technical solution of this application will be described in detail below with reference to specific embodiments and accompanying drawings.

[0059] This application provides a solid-state battery cell, such as... Figure 1 and Figure 2 As shown, the solid-state battery cell 10 includes a negative electrode 2, a positive electrode 4, a solid electrolyte 6, and an insulating frame 1. The positive electrode 4 and the negative electrode 2 are aligned along the thickness direction of the positive electrode 4 (e.g., ...). Figure 1The positive electrode 4 is arranged in the direction shown in the middle (x). The area of ​​the positive electrode 4 is smaller than that of the negative electrode 2. Along the thickness direction of the positive electrode 4, the projection of the positive electrode 4 onto the negative electrode 2 is located inside the negative electrode 2. The positive electrode 4 is electrically connected to the positive electrode tab 5, and the negative electrode 2 is electrically connected to the negative electrode tab 3. Along the thickness direction of the positive electrode 4, the solid electrolyte 6 is located between the negative electrode 2 and the positive electrode 4, and on the side of the positive electrode 4 away from the negative electrode 2. The insulating frame 1 is arranged around the periphery of the positive electrode 4 and connected between the two solid electrolytes 6. The positive electrode tab 5 can pass through the insulating frame 1 through the splicing gap between the first insulating member 11 and the second insulating member 12.

[0060] Therefore, the edges of the solid electrolyte 6 and the negative electrode 2 can be supported by the insulating frame 1, so that when the solid cell 10 is subjected to pressure, the edges of the solid electrolyte 6 and the negative electrode 2 can be effectively prevented from deforming and being damaged due to lack of support. At the same time, it can also effectively prevent the edges of the positive electrode 4 and the negative electrode 2 from short-circuiting, which is beneficial to improving the performance of the solid cell 10.

[0061] Along the thickness direction of the positive electrode sheet 4, the difference between the size of the insulating frame 1 and the thickness of the positive electrode sheet 4 is -0.5μm to 0.5μm.

[0062] Therefore, when pressing the solid-state cell 10 in the subsequent process, it can effectively prevent poor contact between the positive electrode 4 and the solid electrolyte 6 due to the dimension of the insulating frame 1 along the thickness direction of the positive electrode 4 being too large than the thickness of the positive electrode 4. It can also effectively prevent poor support effect of the insulating frame 1 on the solid electrolyte 6 and the negative electrode 2 due to the dimension of the insulating frame 1 along the thickness direction of the positive electrode 4 being too small than the thickness of the positive electrode 4. This avoids the situation where the edges of the solid electrolyte 6 and the negative electrode 2 are deformed or even damaged due to the poor support effect of the insulating frame 1 on the solid electrolyte 6 and the negative electrode 2.

[0063] Wherein, along the thickness direction of the positive electrode 4, the difference between the size of the insulating frame 1 and the size of the positive electrode 4 can be -0.5μm, 0.5μm, or any value between -0.5μm and 0.5μm, and is not limited here.

[0064] The insulating frame 1 for the solid-state battery cell 10 described above can be formed by dispensing. Specifically, during the fabrication of the solid-state battery cell 10, the dispensing nozzle of the dispensing structure slowly moves around the edge of the solid electrolyte 6 to dispense adhesive onto the solid electrolyte 6, forming the insulating frame 1. However, fabricating the insulating frame 1 by dispensing involves a long dispensing nozzle travel distance and a slow speed, resulting in low fabrication efficiency. Furthermore, the dispensing nozzle needs to change its direction multiple times during the dispensing process, requiring high precision in its position. Additionally, the dispensing amount and speed must be controlled to ensure the dispensing volume meets requirements, demanding high precision in dispensing volume, speed, and dispensing quantity detection. This makes the fabrication of the insulating frame 1 challenging and detrimental to cost control of the solid-state battery cell 10.

[0065] Based on this, such as Figures 2-5 As shown, the insulating frame 1 includes a first insulating member 11 and a second insulating member 12. The second insulating member 12 and the first insulating member 11 are spliced ​​together along the thickness direction of the positive electrode plate 4 to form a frame structure. The area enclosed by the frame structure is used to accommodate the positive electrode plate 4. The positive electrode tab 5 can pass through the splicing gap between the first insulating member 11 and the second insulating member 12 and exit the insulating frame 1. The first insulating member 11 and the second insulating member 12 are both injection molded by mold.

[0066] Therefore, by splicing the second insulating member 12 and the first insulating member 11 along the thickness direction of the positive electrode plate 4 to form a frame structure, the insulating frame 1 can be arranged around the periphery of the positive electrode plate 4 to support the edges of the solid electrolyte 6 and the negative electrode plate 2. At the same time, the positive electrode tab 5, which is electrically connected to the positive electrode plate 4, can easily extend out of the insulating frame 1, which facilitates the manufacturing of the solid-state battery cell 10. Furthermore, the first insulating member 11 and the second insulating member 12 can clamp and support the positive electrode tab 5, reducing the probability of deformation or movement of the positive electrode tab 5, which is beneficial to improving the quality of the solid-state battery cell 10.

[0067] Both the first insulating component 11 and the second insulating component 12 are injection molded. During the fabrication of the insulating frame 1, the mold is placed on the solid electrolyte 6, positioned, and then glue is injected into the mold to form the first insulating component 11 and the second insulating component 12. This operation is simple and quick. In other words, firstly, only one positioning of the mold is needed to ensure the insulating frame 1 meets the required position, simplifying the fabrication process, reducing the difficulty of fabricating the insulating frame 1, and improving the fabrication efficiency. Secondly, the glue injection structure does not need to move along the periphery of the solid-state battery; glue can be injected into the mold through the injection hole on the mold, making the operation simple, convenient, and efficient. Furthermore, the dimensions of the resulting insulating frame 1 are stable, facilitating mass production and reducing costs. Thirdly, there is no need to set up a structure to detect the movement trajectory of the glue injection structure (such as the injection nozzle), simplifying the fabrication structure of the solid-state cell 10 and saving costs.

[0068] The first insulating component 11 can be made of any of polyurethane, epoxy resin, acrylic, etc., which can give the first insulating component 11 good insulation properties.

[0069] Optionally, the first insulating component 11 can be any of polyurethane adhesive, epoxy resin adhesive, and acrylic adhesive, so that the first insulating component 11 can be bonded to the solid electrolyte 6, avoiding the displacement of the positive electrode plate 4 due to the movement of the first insulating component 11, which is beneficial to improving the performance of the solid cell 10.

[0070] The material of the second insulating component 12 can be the same as that of the first insulating component, so that when the first insulating component 11 and the second insulating component 12 are injection molded, there is no need to change the injection molding material, which is conducive to improving production efficiency and reducing costs.

[0071] For example, the material of the first insulating component 11 can be UV (Ultraviolet) curable insulating adhesive, so that after injection molding, the curing of the UV curable insulating adhesive can be accelerated by ultraviolet light irradiation or heating, which is beneficial to improving the manufacturing efficiency of the solid-state battery cell 10. In addition, the UV curable insulating adhesive has good adhesion and tensile strength, which is beneficial to improving the performance of the solid-state battery cell 10.

[0072] For example, when manufacturing the solid-state battery cell 10, a negative electrode 2 can be placed at the first positioning station of the positioning mechanism, and a solid electrolyte 6 can be stacked on the negative electrode 2, aligning the solid electrolyte 6 with the negative electrode 2. Then, a mold for manufacturing the first insulating component 11 is placed on the solid electrolyte 6. The injection nozzle of the injection structure can inject adhesive into the mold through the injection hole on the mold. After the adhesive in the mold has cured or partially cured, the mold is removed. Then, the positive electrode 4 is placed in the area enclosed by the first insulating component 11, and the positive electrode tab 5 extends out of the first insulating component 11. At the same time, another solid-state battery cell is placed at the second positioning station of the positioning mechanism. Electrolyte 6 is prepared, and the mold for making the second insulating component 12 is placed on the other solid electrolyte 6. Then, glue is injected into the mold for making the second insulating component 12. After the glue is cured or semi-cured, the mold is removed. Finally, the other solid electrolyte 6 and the second insulating component 12 are moved together to the first positioning station, and the second insulating component 12 is stacked on the first insulating component 11 together with the other solid electrolyte 6, so that the first insulating component 11 and the second insulating component 12 are spliced ​​together to form an insulating frame 1, thus completing the stacking of the negative electrode 2, solid electrolyte 6, insulating frame 1 and positive electrode 4. Finally, the above steps are repeated to complete the stacking operation of the solid cell 10.

[0073] The first insulating member 11 mentioned above can have various structural forms, and the second insulating member 12 can also have various structural forms, as long as the first insulating member 11 and the second insulating member 12 can be spliced ​​along the thickness direction of the positive electrode plate 4 to form a frame structure, and there is no limitation here.

[0074] In the first structural form of the first insulating member 11 and the second insulating member 12, such as Figure 3 As shown, the first insulating component 11 includes a first splicing frame, and the second insulating component 12 includes a second splicing frame. The first splicing frame and the second splicing frame are along the axial direction of the first splicing frame (e.g., ...). Figure 3 The first and second splicing frames are spliced ​​together in the direction shown by y1, and the inner contours of the first and second splicing frames are the same in size and shape, as are the outer contours of the first and second splicing frames.

[0075] Therefore, the first insulating member 11 can be formed to enclose an area for accommodating the positive electrode plate 4 after the first insulating member is manufactured, which facilitates the placement of the positive electrode plate 4 when manufacturing the solid-state battery cell 10 and helps to improve the manufacturing efficiency of the solid-state battery cell 10.

[0076] Along the axial direction of the first splicing frame, the thickness of the first splicing frame and the thickness of the second splicing frame can be the same. In this case, the mold for making the first splicing frame and the mold for making the second splicing frame can be the same, which reduces the difficulty of mold making.

[0077] Of course, the thickness of the first splicing frame and the thickness of the second splicing frame can also be different along the axial direction of the first splicing frame. In this case, the mold for making the first splicing frame and the mold for making the second splicing frame can only differ in the depth of the cavity along the axial direction of the first splicing frame, while the shape and other dimensions can be the same. This also makes the structure of the mold for making the first splicing frame and the structure of the mold for making the second splicing frame relatively simple and easy to implement.

[0078] In addition, when stacking solid-state cells 10, the axial direction of the first splicing frame can be parallel to the thickness direction of the positive electrode 4.

[0079] In the second type of structure of the first insulating member 11 and the second insulating member 12, such as Figure 4 As shown, the first insulating member 11 is a rectangular frame structure, comprising a first frame edge 111, a second frame edge 112, a third frame edge 113, and a fourth frame edge 114 connected in sequence; the second insulating member 12 is a rectangular frame structure with an opening on one side, comprising a fifth frame edge 121, a sixth frame edge 122, and a seventh frame edge 123, wherein the sixth frame edge 122 connects the fifth frame edge 121 and the seventh frame edge 123 along the axial direction of the rectangular frame structure (e.g., ...). Figure 4 (As shown in y2), the fifth frame edge 121, the sixth frame edge 122 and the seventh frame edge 123 are respectively spliced ​​with the second frame edge 112, the third frame edge 113 and the fourth frame edge 114. Along the axial direction of the square frame structure, the sum of the thicknesses of the fifth frame edge 121 and the second frame edge 112, the sum of the thicknesses of the sixth frame edge 122 and the third frame edge 113 and the sum of the thicknesses of the seventh frame edge 123 and the fourth frame edge 114 are all consistent with the thickness of the first frame edge 111.

[0080] Therefore, the thickness of the first frame edge 111 is greater than the thickness of the fifth frame edge 121, the sixth frame edge 122 and the seventh frame edge 123, so that when splicing the first insulating member 11 and the second insulating member 12, the first frame edge 111 can limit the fifth frame edge 121 and the seventh frame edge 123, which facilitates splicing and improves the manufacturing efficiency of the solid-state battery cell 10.

[0081] The first insulating element 11 is a square frame structure, which can be either a square frame structure or a rectangular frame structure, and is not limited here. The corresponding second insulating element 12 is a square frame structure with an opening on one side, which can be either a square frame structure with an opening on one side or a rectangular frame structure with an opening on one side, and is not limited here.

[0082] Furthermore, the thickness of the fifth frame edge 121 and the second frame edge 112 along the axial direction of the frame structure may be the same or different, and this is not limited here. The shapes of the fifth frame edge 121 and the second frame edge 112 may be the same, and their dimensions in the direction perpendicular to the axial direction of the frame structure may be the same, so that after the first insulating member 11 and the second insulating member 12 are spliced, the fifth frame edge 121 and the second frame edge 112 can be aligned along the axial direction of the frame structure.

[0083] Similarly, the thickness relationship between the sixth frame edge 122 and the third frame edge 113 along the axial direction of the frame structure, as well as their shape and dimensional relationship along the direction perpendicular to the axial direction of the frame structure, can be roughly the same as the implementation of the fifth frame edge 121 and the second frame edge 112. For details, please refer to the above, and it will not be repeated here.

[0084] The thickness relationship between the seventh frame edge 123 and the fourth frame edge 114 along the axial direction of the frame structure, as well as their shape and dimensional relationship along the direction perpendicular to the axial direction of the frame structure, can be roughly the same as the implementation of the fifth frame edge 121 and the second frame edge 112. For details, please refer to the above, and it will not be repeated here.

[0085] In the third structural form of the first insulating member 11 and the second insulating member 12, such as Figure 5 As shown, the first insulating member 11 has a rectangular frame structure. The first insulating member 11 includes a first frame edge 111, a second frame edge 112, a third frame edge 113, and a fourth frame edge 114 connected in sequence. The first frame edge 111 has an axial direction along the rectangular frame structure (e.g., Figure 5 The first surface and the second surface are opposite to each other (in the direction shown by y3). A strip-shaped notch 1111 is provided on the first surface, and the strip-shaped notch 1111 connects the inner side and the outer side of the square frame structure. The first insulating member 11 is a strip structure that matches the strip-shaped notch 1111, and the strip structure is embedded in the strip-shaped notch 1111.

[0086] Therefore, when splicing the first insulating component 11 and the second insulating component 12, the second insulating component 12 can be embedded in the strip-shaped notch 1111 on the first insulating component 11, which is quick and convenient.

[0087] It is understood that the strip-shaped notch 1111 connects the inner and outer sides of the rectangular structure. It can be that the first frame edge 111, the second frame edge 112, the third frame edge 113 and the fourth frame edge 114 enclose a space for placing the positive electrode plate 4. The inner side of the rectangular structure can be the inner side of the first frame edge 111 facing the space for placing the positive electrode plate 4, and the outer side of the rectangular structure can be the outer side of the first frame edge 111 away from the space for placing the positive electrode plate 4. The strip-shaped notch 1111 can penetrate the inner and outer sides of the first frame edge 111 in a direction perpendicular to the inner and outer sides of the first frame edge 111.

[0088] Among them, the strip structure can be a quadrangular prism structure, which makes the cavity structure of the mold for making the second insulating part 12 simpler and easier to realize.

[0089] This application also discloses a mold for manufacturing the insulating frame 1 for the solid-state battery cell 10 according to any of the above embodiments, such as... Figures 6-10 As shown, mold 7 includes a first mold 71 and a second mold 72, wherein the first mold 71 is used for injection molding the first insulating part 11; and the second mold 72 is used for injection molding the second insulating part 12.

[0090] Therefore, by injection molding the first insulating part 11 through the first mold 71 and the second insulating part 12 through the second mold 72, the efficiency of manufacturing the first insulating part 11 and the second insulating part 12 is greatly improved, which is conducive to improving the manufacturing efficiency of the solid-state battery cell 10 and effectively improving the dimensional stability of the first insulating part 11 and the second insulating part 12. Moreover, it can be molded in one step without the need to control the movement trajectory of the injection nozzle during injection, which is suitable for mass production and effectively reduces costs.

[0091] The structures of the first mold 71 and the second mold 72 may be the same or different, and no limitation is made here.

[0092] Optionally, such as Figure 6 , Figure 9 and Figure 10 As shown, the first mold 71 has a first cavity 711 that matches the first insulating member 11. The first cavity 711 extends through one side surface of the first mold 71 along the axial direction of the frame structure to form a first demolding opening 712. The second mold 72 has a second cavity 721 that matches the second insulating member 12. The second cavity 721 extends through one side surface of the second mold 72 along the axial direction of the frame structure to form a second demolding opening 722.

[0093] Therefore, when manufacturing the first insulating component 11, the first mold 71 is placed with the first demolding opening 712 facing the solid electrolyte 6. After the adhesive has cured or partially cured, the first mold 71 can be removed by simply pulling it away from the solid electrolyte 6. The operation is simple and convenient. Similarly, when manufacturing the second insulating component 12, the second mold 72 is placed with the second demolding opening 722 facing the solid electrolyte 6. After the adhesive has cured or partially cured, the second mold 72 can be removed by pulling it away from the solid electrolyte 6. The second insulating component 12 can then be formed on the surface of the solid electrolyte 6. The operation is simple and convenient.

[0094] For example, such as Figure 3 and Figure 6As shown, when the first insulating member 11 includes a first splicing frame and the second insulating member 12 includes a second splicing frame, and the inner contours of the first and second splicing frames have the same dimensions and shapes, and the outer contours of the first and second splicing frames have the same dimensions and shapes, the first cavity 711 of the first mold 71 matches the first splicing frame, and the second cavity 721 of the second mold 72 matches the second splicing frame. That is, both the first cavity 711 and the second cavity 721 can be annular cavities, such as square annular cavities, and the shape of the first cavity 711 is consistent with the shape of the second cavity 721. Along the direction perpendicular to the axial direction of the first splicing frame, the width of the first cavity 711 is the same as the width of the second cavity 721. In addition, along the axial direction of the first splicing frame, the depth of the first cavity 711 and the depth of the second cavity 721 can also be the same. In this way, the first mold 71 and the second mold 72 can be identical, which facilitates the manufacturing of the mold 7.

[0095] like Figure 4 and Figure 9As shown, when the first insulating member 11 is a square frame structure, the first insulating member 11 includes a first frame edge 111, a second frame edge 112, a third frame edge 113, and a fourth frame edge 114 connected in sequence; the second insulating member 12 is a square frame structure with an opening on one side, the second insulating member 12 includes a fifth frame edge 121, a sixth frame edge 122, and a seventh frame edge 123. Along the axial direction of the square frame structure, when the sum of the thicknesses of the fifth frame edge 121 and the second frame edge 112, the sum of the thicknesses of the sixth frame edge 122 and the third frame edge 113, and the sum of the thicknesses of the seventh frame edge 123 and the fourth frame edge 114 are all consistent with the thickness of the first frame edge 111, the first cavity 711 of the first mold 71 matches the square frame structure, and the second cavity 721 of the second mold 72 matches the square frame structure with an opening on one side. That is, the first cavity 711 may include a first cavity segment 7111, a second cavity segment 7112, a third cavity segment 7113, and a fourth cavity segment 7114 connected in sequence. The first cavity segment 7111 can be injection molded to form a first frame edge 111, the second cavity segment 7112 can be injection molded to form a second frame edge 112, the third cavity segment 7113 can be injection molded to form a third frame edge 113, and the fourth cavity segment 7114 can be injection molded to form a fourth frame edge 114. The second cavity 721 may include a fifth cavity segment 7211, a sixth cavity segment 7212, and a seventh cavity segment 7213. The sixth cavity segment 721... 2 connects the fifth cavity segment 7211 and the seventh cavity segment 7213. The fifth cavity segment 7211 can be injection molded into the fifth frame edge 121, the sixth cavity segment 7212 can be injection molded into the sixth frame edge 122, and the seventh cavity segment 7213 can be injection molded into the seventh frame edge 123. Along the axial direction of the frame structure, the sum of the depths of the fifth cavity segment 7211 and the second cavity segment 7112, the sum of the depths of the sixth cavity segment 7212 and the third cavity segment 7113, and the sum of the depths of the seventh cavity segment 7213 and the fourth cavity segment 7114 are all consistent with the depth of the first cavity segment 7111.

[0096] In addition, along the axial direction of the frame structure, the depth of the fifth type cavity segment 7211 may be the same as or different from the depth of the second type cavity segment 7112, the depth of the sixth type cavity segment 7212 may be the same as or different from the depth of the third type cavity segment 7113, and the depth of the seventh type cavity segment 7213 may be the same as or different from the depth of the fourth type cavity segment 7114.

[0097] The shape of the fifth cavity segment 7211 is the same as that of the second cavity segment 7112, and the width of the fifth cavity segment 7211 is the same as that of the second cavity segment 7112 in the direction perpendicular to the axial direction of the frame structure, so that the fifth frame edge 121 and the second frame edge 112 can be aligned along the axial direction of the frame structure after splicing.

[0098] like Figure 5 and Figure 10As shown, when the first insulating member 11 is a square frame structure, the first insulating member 11 includes a first frame edge 111, a second frame edge 112, a third frame edge 113 and a fourth frame edge 114 connected in sequence. The first frame edge 111 is provided with a strip-shaped notch 1111 that connects the inner and outer sides of the square frame structure. When the first insulating member 11 is a strip-shaped structure that matches the strip-shaped notch 1111, the first cavity 711 of the first mold 71 matches the square frame structure, and the second cavity 721 of the second mold 72 matches the strip-shaped structure. That is, the first cavity 711 can be an annular cavity, such as a square annular cavity. The first cavity 711 may include a first cavity segment 7111, a second cavity segment 7112, a third cavity segment 7113, and a fourth cavity segment 7114 connected in sequence. A boss may be provided in the first cavity segment 7111 so that after the glue is injected into the first cavity segment 7111, a first frame edge 111 with a strip-shaped notch 1111 can be injection molded. The second cavity segment 7112 can be injection molded to form a second frame edge 112, the third cavity segment 7113 can be injection molded to form a third frame edge 113, and the fourth cavity segment 7114 can be injection molded to form a fourth frame edge 114. The second cavity 721 can be a groove, and the groove can be as follows: Figure 10 As shown, it extends along the extension direction of the first cavity segment 7111 so that a strip structure can be injection molded after the glue is injected into the second cavity 721.

[0099] Optionally, both the first mold 71 and the second mold 72 may be square molds 7, with the inner contour of the first mold 71 and the inner contour of the second mold 72 having the same size and shape, and the outer contour of the first mold 71 and the outer contour of the second mold 72 having the same size and shape.

[0100] Therefore, the external shape and size of the first mold 71 are the same as those of the second mold 72. When the first insulating component 11 and the second insulating component 12 are manufactured on the solid electrolyte 6 through the first mold 71 and the second mold 72, the positioning structure and positioning operation of the first mold 71 are the same as those of the second mold 72. This facilitates the injection molding of the first insulating component 11 and the second insulating component 12 and improves the manufacturing efficiency of the solid battery cell 10.

[0101] In addition, both the first mold 71 and the second mold 72 are square molds 7, which can effectively reduce the weight of the first mold 71 and the second mold 72 and facilitate the movement of the first mold 71 and the second mold 72.

[0102] Optionally, such as Figures 6-10 As shown, the first mold 71 has two long side frames 713 arranged opposite to each other and a plurality of first liquid injection ports 714 connected to the first cavity 711. The plurality of first liquid injection ports 714 are respectively arranged on the two long side frames 713, and the number of first liquid injection ports 714 arranged on the two long side frames 713 is equal and their positions are opposite.

[0103] Therefore, glue can be injected into the first cavity 711 simultaneously through multiple first injection ports 714, which improves the glue injection efficiency and thus effectively improves the manufacturing efficiency of the first insulating component 11, thereby making the manufacturing efficiency of the solid-state battery cell 10 even higher.

[0104] By setting an equal number of first injection ports 714 on the two long frame 713 and positioning them opposite each other, the time required to fill the first cavity 711 with glue can be effectively shortened, which is beneficial to improving the manufacturing efficiency of the first insulating component 11, thereby making the manufacturing efficiency of the solid-state battery cell 10 higher.

[0105] It is understandable that the equal number and relative positions of the first injection ports 714 set on the two long sidewalls 713 mean that the first mold 71 also has two short sidewalls set opposite to each other and a width center line that bisects the short sidewalls. The width center line is parallel to the long sidewalls 713, and the first injection ports 714 set on the two long sidewalls 713 are symmetrically set about the width center line.

[0106] The number of first injection ports 714 can be two, three or more, and there is no limitation here.

[0107] Of course, in other embodiments, the first injection port 714 may also be located on the short frame, or a portion of the multiple first injection ports 714 may be located on the short frame and another portion on the long frame 713, which is not limited here.

[0108] like Figures 6-10 As shown, the long frame 713 has a first surface, a second surface, and an outer surface connected between the first surface and the second surface, which are arranged opposite to each other along the axial direction of the frame structure. A portion of the first demolding opening 712 is located on the first surface, and a plurality of first liquid injection ports 714 are located on the second surface or on the outer surface.

[0109] This greatly facilitates the injection of adhesive into the mold cavity, which is beneficial to improving the manufacturing efficiency of the first insulating component 11 and the second insulating component 12.

[0110] Correspondingly, the second mold 72 may have at least one second injection port 723 connected to the second cavity 721. The position of the at least one second injection port 723 on the second mold 72 may be approximately the same as the position of the first injection port 714 on the first mold 71. For details, please refer to the above description, which will not be repeated here.

[0111] In addition, the first mold 71 is a transparent structure, and / or the second mold 72 is a transparent structure.

[0112] Therefore, after injecting glue into the first mold 71 and the second mold 72, the curing of the glue can be accelerated by ultraviolet light irradiation, thereby improving the production efficiency of the insulating frame 1.

[0113] The material of the first mold 71 can be plexiglass, polycarbonate, polypropylene, etc., and there is no limitation here.

[0114] In some embodiments, the roughness of the cavity wall of the first mold 71 is 0.1 μm to 0.8 μm, and / or the roughness of the cavity wall of the second mold 72 is 0.1 μm to 0.8 μm.

[0115] Therefore, the cavity wall of the first mold 71 can be relatively smooth, making it less likely for glue to accumulate or for the surface of the injection-molded first insulating part 11 to form strings, thus improving the quality of the first insulating part 11. At the same time, it also makes it less difficult to achieve the desired roughness of the cavity wall of the first mold 71, thus reducing the cost of manufacturing the first mold 71. Similarly, the cavity wall of the second mold 72 can be relatively smooth, making it less likely for glue to accumulate or for the surface of the injection-molded second insulating part 12 to form strings, thus improving the quality of the second insulating part 12. At the same time, it also makes it less difficult to achieve the desired roughness of the cavity wall of the second mold 72, thus reducing the cost of manufacturing the second mold 72.

[0116] The roughness of the cavity wall of the first mold 71 can be 0.1μm, 0.8μm, or any value between 0.1μm and 0.8μm, and is not limited here.

[0117] The roughness of the cavity wall of the second mold 72 can be 0.1μm, 0.8μm, or any value between 0.1μm and 0.8μm, and is not limited here.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An insulating frame (1) for solid-state battery cells, characterized in that, The solid-state battery cell (10) includes a positive electrode plate (4) and a positive electrode tab (5) that are electrically connected to each other, and the insulating frame (1) includes: First insulating component (11); The second insulating element (12) and the first insulating element (11) are spliced ​​together along the thickness direction of the positive electrode sheet (4) to form a frame structure. The area enclosed by the frame structure is used to accommodate the positive electrode sheet (4). The positive electrode tab (5) can pass through the insulating frame (1) through the splicing gap between the first insulating element (11) and the second insulating element (12). The first insulating element (11) and the second insulating element (12) are both injection molded by mold (7).

2. The insulating frame (1) for solid-state battery cells according to claim 1, characterized in that, The first insulating component (11) includes a first splicing frame, and the second insulating component (12) includes a second splicing frame. The first splicing frame and the second splicing frame are spliced ​​along the axial direction of the first splicing frame, and the inner contour of the first splicing frame and the inner contour of the second splicing frame are the same in size and shape. The outer contour of the first splicing frame and the outer contour of the second splicing frame are the same in size and shape.

3. The insulating frame (1) for solid-state battery cells according to claim 1, characterized in that, The first insulating member (11) has a square frame structure and includes a first frame edge (111), a second frame edge (112), a third frame edge (113) and a fourth frame edge (114) connected in sequence. The second insulating member (12) is a square frame structure with an opening on one side. The second insulating member (12) includes a fifth frame edge (121), a sixth frame edge (122) and a seventh frame edge (123). The sixth frame edge (122) is connected between the fifth frame edge (121) and the seventh frame edge (123). Along the axial direction of the square frame structure, the fifth frame edge (121), the sixth frame edge (122) and the seventh frame edge (123) are respectively spliced ​​with the second frame edge (112), the third frame edge (113) and the fourth frame edge (114). Along the axial direction of the square frame structure, the sum of the thicknesses of the fifth frame edge (121) and the second frame edge (112), the sum of the thicknesses of the sixth frame edge (122) and the third frame edge (113) and the sum of the thicknesses of the seventh frame edge (123) and the fourth frame edge (114) are all consistent with the thickness of the first frame edge (111).

4. The insulating frame (1) for solid-state battery cells according to claim 1, characterized in that, The first insulating member (11) is a square frame structure. The first insulating member (11) includes a first frame edge (111), a second frame edge (112), a third frame edge (113) and a fourth frame edge (114) connected in sequence. The first frame edge (111) has a first surface and a second surface that are opposite to each other along the axial direction of the square frame structure. A strip-shaped notch (1111) is provided on the first surface. The strip-shaped notch (1111) connects the inner side and the outer side of the square frame structure. The first insulating element (11) is a strip structure that matches the strip-shaped notch (1111), and the strip structure is embedded in the strip-shaped notch (1111).

5. A mold (7), characterized in that, The mold (7) is used to manufacture the insulating frame (1) for the solid-state battery cell (10) according to any one of claims 1-4, and the mold (7) comprises: The first mold (71) is used for injection molding the first insulating part (11); The second mold (72) is used for injection molding the second insulating part (12).

6. The mold (7) according to claim 5, characterized in that, The first mold (71) has a first cavity (711) that matches the first insulating member (11), and the first cavity (711) extends through one side surface of the first mold (71) along the axial direction of the frame structure to form a first demolding opening (712); The second mold (72) has a second cavity (721) that matches the second insulating member (12), the second cavity (721) extending through one side surface of the second mold (72) along the axial direction of the frame structure to form a second demolding opening (722).

7. The mold (7) according to claim 6, characterized in that, Both the first mold (71) and the second mold (72) are square molds (7). The inner contours of the first mold (71) and the second mold (72) are the same in size and shape, and the outer contours of the first mold (71) and the second mold (72) are the same in size and shape.

8. The mold (7) according to claim 7, characterized in that, The first mold (71) has two long side frames (713) arranged opposite to each other and a plurality of first liquid injection ports (714) connected to the first cavity (711). The plurality of first liquid injection ports (714) are respectively arranged on the two long side frames (713), and the number of first liquid injection ports (714) arranged on the two long side frames (713) is equal and their positions are opposite.

9. The mold (7) according to claim 8, characterized in that, The long frame (713) has a first surface, a second surface and an outer surface connected between the first surface and the second surface, which are arranged opposite to each other along the axial direction of the frame structure. A portion of the first demolding opening (712) is located on the first surface, and a plurality of the first liquid injection ports (714) are located on the second surface or on the outer surface.

10. The mold (7) according to any one of claims 5-9, characterized in that, The first mold (71) is a transparent mold (7), and / or the second mold (72) is a transparent mold (7).

11. The mold (7) according to any one of claims 5-9, characterized in that, The roughness of the cavity wall of the first mold (71) is 0.1 μm to 0.8 μm, and / or the roughness of the cavity wall of the second mold (72) is 0.1 μm to 0.8 μm.

12. A solid-state battery cell (10), characterized in that, include: Negative electrode plate (2); A positive electrode (4) is arranged along the thickness direction of the negative electrode (2). The area of ​​the positive electrode (4) is smaller than the area of ​​the negative electrode (2). Along the thickness direction of the positive electrode (4), the projection of the positive electrode (4) onto the negative electrode (2) is located within the negative electrode (2). The positive electrode (4) is electrically connected to the positive electrode tab (5). Solid electrolyte (6), along the thickness direction of the positive electrode (4), the solid electrolyte (6) is located between the negative electrode (2) and the positive electrode (4), and on the side of the positive electrode (4) away from the negative electrode (2); The insulating frame (1) according to any one of claims 1-4 is arranged around the periphery of the positive electrode plate (4) and connected between the two solid electrolytes (6), and the positive electrode tab (5) can pass through the insulating frame (1) through the splicing gap between the first insulating member (11) and the second insulating member (12).

13. The solid-state battery cell (10) according to claim 12, characterized in that, Along the thickness direction of the positive electrode sheet (4), the difference between the size of the insulating frame (1) and the thickness of the positive electrode sheet (4) is -0.5μm to 0.5μm.

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