Splicing support sealing structure and battery pack

Abstract

The utility model discloses a splicing support sealing structure and a battery pack, the splicing support sealing structure comprises more than two splicing support main bodies, each splicing support main body comprises a top surface, a bottom surface opposite to the top surface and a side edge vertical to the top surface and the bottom surface, the top surface is set as a horizontal plane, and the side edge of each splicing support main body comprises at least one splicing edge; the two splicing edges which abut against each other form a splicing gap, and the position of the splicing gap on the top face and the position of the splicing gap on the bottom face are arranged in a staggered mode in the horizontal direction of the horizontal plane. The sealing platforms are arranged between the splicing edges of the splicing support body and the adjacent splicing edges, longitudinal gaps below the sealing platforms can be shielded through the sealing layers, the sealing performance between the splicing edges is improved, and therefore the risk of glue leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core brackets, and in particular to a spliced ​​bracket sealing structure and a battery pack. Background Art

[0002] Existing battery packs are usually provided with a bracket structure for supporting battery cells. A number of holes corresponding to the number of battery cells are provided in the center of the bracket, and the edge is sealed and connected to the battery frame through foam. In some existing battery packs, in order to make the bracket meet the assembly of more groups of battery cells, the bracket is designed as an assembly structure to achieve that the bracket meets the needs of any number of battery groups, and the assembly shape of the bracket can be freely assembled according to actual needs, thereby improving product quality and production efficiency.

[0003] Most of the existing bracket joints do not involve sealing structures, or the sealing effect is poor. Since there are longitudinal gaps at the joints, there is a risk of glue leaking downward under the influence of gravity after glue filling, causing the glue to flow into the pressure relief cavity, causing safety hazards. Utility Model Content

[0004] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a splicing bracket sealing structure and a battery pack. The risk of glue leakage can be solved. A sealing platform is provided between the splicing edge and the adjacent splicing edge of the splicing bracket body. The longitudinal gap below the sealing platform can be shielded by the sealing layer to improve the sealing between the splicing edges, thereby avoiding the risk of glue leakage.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] A splicing bracket sealing structure includes more than two splicing bracket bodies, wherein the splicing bracket bodies include a top surface, a bottom surface opposite to the top surface, and side edges perpendicular to the top surface and the bottom surface, the top surface is set as a horizontal plane, and the side edges of the splicing bracket bodies include at least one splicing edge; two splicing edges abutting each other form a splicing gap, and the position of the splicing gap on the top surface and the position of the splicing gap on the bottom surface are staggered along the horizontal direction of the horizontal plane.

[0007] By adopting the above solution, the glue encounters greater resistance when flowing downward from the splicing gap, thereby achieving the effect of preventing glue leakage.

[0008] Furthermore, one side of the splicing edge close to the top surface is concave to form a stepped surface, and the stepped surfaces of the two splicing bracket bodies abutting against each other form a sealing platform; at least one bracket sealing layer is arranged on the sealing platform.

[0009] By adopting the above scheme, by setting a stepped surface on the splicing edge of the splicing bracket body, a sealing platform can be formed after splicing, and the splicing gap in the center of the sealing platform is covered and sealed by at least one sealing layer, which greatly improves the splicing sealing between the splicing bracket bodies, thereby effectively preventing glue from flowing into the pressure relief cavity from the splicing after glue injection.

[0010] Furthermore, the support sealing layer includes a first sealing layer and a second sealing layer, and the total height of the first sealing layer and the second sealing layer does not protrude from the top surface of the spliced ​​support body.

[0011] By adopting the above solution, it is prevented that a bulge appears on the top surface of the splicing bracket body, which may affect the assembly of the battery cell.

[0012] Furthermore, the distance from the top surface of the spliced ​​bracket body to the sealing platform is 0.8 mm-1.2 mm.

[0013] By adopting the above solution, it can be used to accommodate the support sealing layer and improve the sealing effect.

[0014] Furthermore, the splicing edges are concave or convex to form a splicing surface, and the convex splicing surface of the splicing edge of the splicing bracket body abuts against the concave splicing surface of the splicing edge of the adjacent splicing bracket body.

[0015] By adopting the above solution, the glue is blocked by the two splicing surfaces when flowing downward from the splicing gap, thereby further improving the effect of preventing glue leakage.

[0016] Furthermore, the shape of the splicing edge on the adjacent side edges is C-shaped, L-shaped, snake-shaped or tooth-shaped.

[0017] By adopting the above scheme, the C-shape, L-shape, serpentine shape or toothed shape is conducive to making the glue encounter greater resistance when flowing along the splicing gap, thereby achieving the effect of preventing glue leakage.

[0018] Furthermore, at least one of the spliced ​​bracket bodies has an unspliced ​​side edge, and the side edge is a plane and perpendicular to the horizontal plane.

[0019] By adopting the above solution, the fitting area between the edge of the main body of the spliced ​​bracket and the battery frame is increased, which is beneficial to improving the sealing performance.

[0020] Furthermore, the spliced ​​bracket bodies are spliced ​​together to form a bottom plate bracket, and a sealing assembly structure is provided around the edge of the bottom plate bracket.

[0021] By adopting the above solution, a sealed connection with the box frame can be achieved through the sealed assembly structure, thereby avoiding glue leakage between the bottom plate bracket and the box frame.

[0022] Furthermore, the sealing assembly structure includes: a sealing edge, which is enclosed along the edge of the bottom plate bracket to form a rectangular frame; and a bottom plate sealing layer, which is arranged along the bottom surface of the sealing edge and fits with the bottom surface of the bottom plate bracket.

[0023] By adopting the above scheme, the sealing edge can effectively seal the edge of the bottom plate bracket, and the bottom plate sealing layer can be used to block the arc gap at the edge of the splicing bracket body, thereby ensuring the sealing between the box frame and the bottom plate bracket.

[0024] A battery pack comprises a battery box, a battery cover, a box frame, a battery cell and a splicing bracket sealing structure. The box frame is provided with a matching surface, and the matching surface is sealed and assembled with the edge bottom surface of the splicing bracket body.

[0025] By adopting the above scheme, the sealing performance of the splicing between the spliced ​​bracket bodies can be improved, while ensuring the sealing performance between the bottom plate bracket spliced ​​by the spliced ​​bracket bodies and the mating surface, effectively avoiding the risk of glue flowing to the pressure relief cavity below after glue filling.

[0026] In summary, the splicing bracket sealing structure and battery pack provided by the utility model have the following technical effects:

[0027] 1. The base plate bracket of the battery cell is formed by splicing the main body of the splicing bracket, and the base plate bracket can be expanded at will according to the number of battery cell modules, thereby improving the degree of freedom of free assembly and meeting the expansion requirements of the battery cell;

[0028] 2. The joint edges between the main bodies of the spliced ​​brackets are formed with a sealing platform, which covers the longitudinal joint gap through a horizontal sealing layer to improve the sealing stability and prevent the glue from sliding down due to gravity, thereby effectively avoiding the phenomenon of glue seeping to the bottom after glue filling;

[0029] 3. The sealing layer is used to realize the assembly between adjacent splicing bracket bodies, which can meet the sealing requirements and relatively save assembly parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of a partially disassembled structure of an embodiment of the utility model;

[0031] Figure 2 for Figure 1 Enlarged view of area A in the middle;

[0032] Figure 3 This is a schematic diagram of a bottom plate bracket structure according to an embodiment of the utility model;

[0033] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the middle BB;

[0034] Figure 5 for Figure 4 A schematic structural diagram of another embodiment of the enlarged area;

[0035] Figure 6 This is a schematic diagram of a bottom plate bracket structure according to an embodiment of the utility model;

[0036] Figure 7 The figure is a schematic diagram of the structure of a splicing part of an embodiment of the utility model.

[0037] Among them, the meanings of the figure marks are as follows: 1. Splicing bracket body; 11. Top surface; 12. Bottom surface; 13. Side edge; 14. First splicing bracket; 15. Second splicing bracket; 16. Third intermediate bracket; 2. Splicing edge; 21. Step surface; 22. Sealing platform; 23. Splicing surface; 3. Bracket sealing layer; 31. First sealing layer; 32. Second sealing layer; 4. Bottom plate bracket; 5. Sealing assembly structure; 51. Sealing edge; 52. Bottom plate sealing layer; 6. Splicing gap. DETAILED DESCRIPTION

[0038] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0040] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0042] This utility model refers to Figure 1-Figure 5 As shown, a splicing bracket sealing structure is disclosed, including more than two splicing bracket main bodies 1, the splicing bracket main body 1 includes a top surface 11, a bottom surface 12 opposite to the top surface 11 and a side edge 13 perpendicular to the top surface 11 and the bottom surface 12, the top surface 11 is set as a horizontal plane, the side edge 13 of the splicing bracket main body 1 includes at least one splicing edge 2, two splicing edges 2 abutting each other form a splicing gap 6, and the position of the splicing gap 6 on the top surface 11 and the position of the splicing gap 6 on the bottom surface 12 are staggered along the horizontal direction of the horizontal plane.

[0043] In a specific embodiment, see Figure 5 As shown, the splicing edge 2 is concave or convex to form a splicing surface 23, and the convex splicing surface 23 of the splicing edge 2 of the splicing bracket body 1 abuts against the concave splicing surface 23 of the splicing edge 2 of the adjacent splicing bracket body 1. The splicing edge 2 on the adjacent side edge 13 is C-shaped, L-shaped, serpentine or tooth-shaped, so that the glue is blocked by the two splicing surfaces 23 when flowing downward from the splicing gap, thereby further improving the anti-leakage effect. .

[0044] In this embodiment 1, refer to Figure 1-4 As shown, the splicing edge 2 is concave on one side close to the top surface 11 to form a stepped surface 21, and the splicing edge 2 of the splicing bracket main body 1 abuts against the splicing edge 2 of the adjacent splicing bracket main body 1, and the stepped surfaces 21 of the two splicing bracket main bodies 1 abutting against each other form a sealing platform 22; at least one layer of bracket sealing layer 3 is provided on the sealing platform 22, and by providing the step surface 21 on the splicing edge 2 of the splicing bracket main body 1, a sealing platform 22 can be formed after splicing, and the splicing gap in the center of the sealing platform 22 is covered and sealed by at least one layer of sealing layer, which greatly improves the splicing sealing between the splicing bracket main bodies 1, thereby effectively preventing the glue from flowing into the pressure relief cavity from the splicing after glue filling. The utility model also relates to a battery pack, including a battery box, a battery cover, a box frame, a battery cell and a splicing bracket sealing structure. Two or more splicing bracket main bodies 1 are spliced ​​to form a bottom plate bracket 4. The box frame is provided with a mating surface, and the mating surface is sealed in a fit with a bottom surface 12 of the bottom plate bracket 4. Specifically, the edge bottom surface 12 of the splicing bracket main body 1 is sealed in a fit with the mating surface, which can improve the sealing of the splicing between the splicing bracket main bodies 1, and at the same time ensure the sealing between the bottom plate bracket 4 spliced ​​by the splicing bracket main bodies 1 and the mating surface, effectively avoiding the risk of glue flowing to the pressure relief cavity below after glue filling.

[0045] In this embodiment 1, refer to Figure 1-4As shown, the bottom plate bracket 4 is formed by splicing more than two splicing bracket bodies 1. Specifically, the bottom plate bracket 4 is formed by splicing at least two third intermediate brackets 16. The third intermediate bracket 16 is provided with two oppositely arranged splicing edges 2 for linear splicing of more than two splicing bracket bodies 1, and has the condition of continued splicing and expansion of the edges. The projection of the splicing edge 2 on the horizontal plane is a serpentine bending design, forming a serpentine arc surface to cope with the staggered hole positions on the splicing bracket body 1 plate. The splicing edges 2 of the first splicing bracket 14 and the second splicing bracket 15 are staggered to cope with the staggered assembly of battery cells, ensuring that the splicing edge 2 can avoid the battery cells and improve the space utilization of the battery cell assembly. In other embodiments, the projection of the splicing edge 2 on the horizontal plane can also be other shapes, such as a straight line or a zigzag shape, which is not specifically limited in this embodiment.

[0046] In other embodiments, see Figure 6-7 As shown, the bottom plate bracket 4 is formed by splicing more than three splicing bracket bodies 1, and the splicing bracket body 1 includes a first splicing bracket 14, a second splicing bracket 15 and a third intermediate bracket 16, so that the bottom plate bracket 4 is linearly spliced ​​in sequence by the first splicing bracket 14, the second splicing bracket 15 and at least one third intermediate bracket 16 located between the first splicing bracket 14 and the second splicing bracket 15, and the third intermediate bracket 16 is provided with two oppositely arranged splicing edges 2. When one third intermediate bracket 16 is provided, the two splicing edges 2 of the third intermediate bracket 16 are respectively abutted against the splicing edges 2 of the first splicing bracket 14 and the second splicing bracket 15. When two or more third intermediate brackets 16 are provided, the two splicing edges 2 of the third intermediate bracket 16 are respectively abutted against the splicing edges 2 of the adjacent splicing bracket bodies 1. It is suitable for the situation where multiple splicing bracket bodies 1 are linearly spliced, and has the conditions for arbitrarily adding a third intermediate bracket 16 between the first splicing bracket 14 and the second splicing bracket 15. Of course, in some embodiments, the splicing edge 2 may also be in other shapes, such as a straight line or a zigzag shape, which is not specifically limited in this embodiment.

[0047] In other embodiments, the bottom plate bracket 4 is formed by splicing two splicing bracket bodies 1, and the two splicing bracket bodies 1 are respectively a first splicing bracket 14 and a second splicing bracket 15, and the first splicing bracket 14 and the second splicing bracket 15 are both provided with a splicing edge 2, and the two splicing edges 2 are arranged oppositely, and the splicing edge 2 is designed to be serpentine, forming a serpentine arc surface, so as to cope with the staggered hole positions on the splicing bracket body 1 plate, and the splicing edges 2 of the first splicing bracket 14 and the second splicing bracket 15 are staggered splicing to cope with the staggered assembled battery cells, so as to ensure that the splicing edge 2 can avoid the battery cells and improve the space utilization rate of the battery cell assembly. Except for the splicing edge 2, the first splicing bracket 14 and the second splicing bracket 15 are both designed in a straight line, so that the four edges of the bottom plate bracket 4 are all straight lines, which is conducive to the sealing connection between the bottom plate bracket 4 and the mating surface of the box frame. Of course, in some embodiments, the splicing edge 2 can also be other shapes, such as a straight line or a zigzag shape, which is not specifically limited in this embodiment.

[0048] In other embodiments, see Figure 6-7 As shown, the splicing bracket body 1 can be formed by splicing a plurality of pieces, and the splicing bracket body 1 has four splicing edges 2, which can achieve splicing effects in four directions. The shape of the splicing edge 2 includes but is not limited to C-shape, L-shape, straight line, serpentine or zigzag shape, which is not specifically limited in this embodiment.

[0049] In summary, at least one of the spliced ​​bracket bodies 1 has an unspliced ​​side edge 13, and the side edge 13 is a plane and perpendicular to the horizontal plane. The plane structure increases the fitting area between the edge of the spliced ​​bracket body 1 and the battery frame, which is beneficial to improving the sealing.

[0050] In this embodiment 1, refer to Figure 2 and Figure 4 As shown, the support sealing layer 3 includes a first sealing layer 31 and a second sealing layer 32, and the distance from the top surface 11 of the splicing support body 1 to the sealing platform 22 is 0.8mm-1.2mm, which can be used to accommodate the support sealing layer 3 and improve the sealing effect. The total height of the first sealing layer 31 and the second sealing layer 32 does not protrude from the top surface 11 of the splicing support body 1, which can prevent the top surface 11 of the splicing support body 1 from bulging and affecting the assembly of the battery cell. Specifically, the distance from the top surface 11 of the splicing support body 1 to the sealing platform 22 is preferably 1mm, the first sealing layer 31 is preferably a 0.5mm PC strip with adhesive backing, and the second sealing layer 32 is preferably a structural adhesive, so that the PC strip is pasted on the sealing platform 22, and then the PC strip is sealed and covered by the structural adhesive, which greatly improves the splicing sealing. In some embodiments, if the protrusion has no effect on the assembly of the support sealing layer 3, it can also be designed to be protruding, and this embodiment is not specifically limited.

[0051] In the above embodiments, see Figure 1 As shown, the splicing bracket body 1 is spliced ​​together to form a bottom plate bracket 4, and the edge of the bottom plate bracket 4 is provided with a sealing assembly structure 5 around it. The sealing assembly structure 5 can achieve a sealed connection with the box frame to avoid glue leakage between the bottom plate bracket 4 and the box frame. Specifically, the sealing assembly structure 5 includes a sealing edge 51 and a bottom plate sealing layer 52. The sealing edge 51 is enclosed along the edge of the bottom plate bracket 4 to form a rectangular frame; the bottom plate sealing layer 52 is arranged along the bottom surface 12 of the sealing edge 51 and fits with the bottom surface 12 of the bottom plate bracket 4. The sealing edge 51 can effectively seal the edge of the bottom plate bracket 4. The bottom plate sealing layer 52 can be used to block the arc gap at the edge of the splicing bracket body 1, thereby ensuring the sealing between the box frame and the bottom plate bracket 4. Specifically, the sealing edge 51 is preferably a structural adhesive, and the bottom plate sealing layer 52 is preferably foam.

[0052] In summary, the splicing bracket sealing structure and battery pack provided by the utility model have the following technical effects:

[0053] 1. By adopting a splicable splicing bracket body 1 to splice to form a bottom plate bracket 4 of the battery cell, the bottom plate bracket 4 can be expanded at will according to the number of battery cell modules, thereby improving the degree of freedom of free assembly and meeting the expansion requirements of the battery cell;

[0054] 2. The joint edge 2 between the main bodies 1 of the joint bracket is formed with a sealing platform 22, which covers the longitudinal joint gap through a horizontal sealing layer to improve the sealing stability and prevent the glue from sliding down due to gravity, thereby effectively avoiding the phenomenon of glue seeping to the bottom after glue filling;

[0055] 3. The sealing layer is used to realize the assembly between adjacent splicing bracket bodies 1, which can meet the sealing requirements and relatively save assembly parts.

[0056] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A splicing bracket sealing structure, characterized in that: The invention comprises two or more splicing bracket bodies (1), wherein the splicing bracket body (1) comprises a top surface (11), a bottom surface (12) opposite to the top surface (11), and a side edge (13) perpendicular to the top surface (11) and the bottom surface (12), wherein the top surface (11) is assumed to be a horizontal plane, and the side edge (13) of the splicing bracket body (1) comprises at least one splicing edge (2); Two mutually abutting splicing edges (2) form a splicing gap (6), and the position of the splicing gap (6) on the top surface (11) and the position of the splicing gap (6) on the bottom surface (12) are staggered along the horizontal direction of the horizontal plane.

2. A splicing bracket sealing structure according to claim 1, characterized in that: The side of the splicing edge (2) close to the top surface (11) is concave to form a stepped surface (21), and the stepped surfaces (21) of the two splicing bracket bodies (1) abutting against each other form a sealing platform (22); at least one bracket sealing layer (3) is provided on the sealing platform (22).

3. A splicing bracket sealing structure according to claim 2, characterized in that: The support sealing layer (3) comprises a first sealing layer (31) and a second sealing layer (32), and the total height of the first sealing layer (31) and the second sealing layer (32) does not protrude from the top surface (11) of the spliced ​​support body (1).

4. A spliced ​​bracket sealing structure according to claim 2, characterized in that: The distance from the top surface (11) of the spliced ​​bracket body (1) to the sealing platform (22) is 0.8 mm to 1.2 mm.

5. The spliced ​​bracket sealing structure according to claim 1, characterized in that: The splicing edge (2) is concave or convex to form a splicing surface (23), and the convex splicing surface (23) of the splicing edge (2) of the splicing bracket body (1) abuts against the concave splicing surface (23) of the splicing edge (2) of the adjacent splicing bracket body (1).

6. A spliced ​​bracket sealing structure according to claim 5, characterized in that: The shape of the splicing edge (2) on the adjacent side edges (13) is C-shaped, L-shaped, snake-shaped or tooth-shaped.

7. A spliced ​​bracket sealing structure according to any one of claims 1 to 6, characterized in that: At least one of the spliced ​​bracket bodies (1) has an unspliced ​​side edge (13), and the side edge (13) is a plane and is perpendicular to a horizontal plane.

8. A spliced ​​bracket sealing structure according to any one of claims 1 to 6, characterized in that: The spliced ​​bracket bodies (1) are spliced ​​together to form a bottom plate bracket (4), and a peripheral sealing assembly structure (5) is provided on the edge of the bottom plate bracket (4).

9. A spliced ​​bracket sealing structure according to claim 8, characterized in that: The sealing assembly structure (5) comprises: A sealing edge (51), the sealing edge (51) is formed along the edge of the bottom plate bracket (4) to form a rectangular frame; A bottom plate sealing layer (52), wherein the bottom plate sealing layer (52) is arranged along the bottom surface (12) of the sealing edge (51) and is in contact with the bottom surface (12) of the bottom plate bracket (4).

10. A battery pack, characterized in that: It comprises a battery box, a battery cover, a box frame, a battery cell and a splicing bracket sealing structure as claimed in any one of claims 1 to 9, wherein the box frame is provided with a mating surface, and the mating surface is sealed and assembled with the edge bottom surface (12) of the splicing bracket body (1).

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