Battery pack waterproof structure and battery pack

Abstract

The utility model relates to the technical field of battery pack waterproofing, and particularly discloses a battery pack waterproof structure and a battery pack, a mounting cavity is formed between a shell and an upper cover, and a first frame is arranged in the mounting cavity; a U-shaped groove is formed between the outer side wall of the first frame and the inner side wall of the shell and filled with glue, a plurality of first protruding ribs are arranged at the position, corresponding to the U-shaped groove, of the lower end of the upper cover, the first protruding ribs are inserted into the U-shaped groove, and a plurality of second protruding ribs are arranged at the position, corresponding to the U-shaped groove, of the lower end of the upper cover. Enabling the glue to flow and fill gaps among the first frame, the shell and the upper cover; the U-shaped groove is formed between the outer side wall of the first frame and the inner side wall of the shell, and after the U-shaped groove is filled with the glue, the first protruding rib extending out of the upper cover is inserted into the U-shaped groove, so that a gap is filled with the glue, the sealing waterproof effect is achieved, the glue using amount is small, the glue using amount is not limited by the wall thickness of the shell, and the sealing waterproof requirement of the thin-wall shell battery pack is met.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack waterproofing, and in particular to a battery pack waterproofing structure and a battery pack. Background Art

[0002] Due to the complexity of usage scenarios and harsh conditions, travel battery packs such as two-wheeled vehicles and balance vehicles basically require the shell structure to achieve IPX7 waterproof level. There are two commonly used implementation schemes: the first scheme is overall glue filling. When the battery pack is assembled, before or after closing the cover, a sufficient amount of glue is poured into the shell through the reserved through holes to fill the internal gaps and completely wrap and cover the battery cells, protection plates, etc. to achieve the overall isolation and waterproof effect. However, this scheme has the problems of large glue consumption, high cost, and the internal structure cannot be disassembled. During the production process, if low-value components such as the shell are defective, the entire battery pack will be scrapped, increasing production costs; the second scheme is to design a glue groove for glue sealing in the shell, and design a concave and convex glue groove on the joint surface of the upper and lower shells. By evenly applying glue in the glue groove, and then assembling the upper and lower shells and holding the pressure for a certain period of time, the shell is tightened and sealed and waterproof after the glue is cured. Although this scheme reduces the amount of glue used, it is limited by the thickness of the shell wall and the small size of the glue groove. It has high requirements on the bonding strength of the glue and is not convenient for rework.

[0003] Since battery packs for two-wheeled vehicles and balance bikes have many size and weight restrictions, their battery packs usually have a small cross-section, a small square or nearly circular shape, but are usually long in length, and the main outer shell is mostly thin-walled metal, the wall thickness of which cannot meet the width requirement of the glue groove. If an overall glue filling solution is used, it is not conducive to weight control. Therefore, the existing waterproof protection solutions cannot meet the design requirements of this type of battery pack. Utility Model Content

[0004] In response to the above-mentioned problems such as high overall glue filling cost and glue groove sealing being limited by the outer wall thickness, the utility model provides a battery pack waterproof structure and a battery pack, which have the advantages of small glue consumption and not being limited by the shell wall thickness, and is suitable for the sealing and waterproofing needs of thin-wall shell battery packs.

[0005] In order to solve the above technical problems, the specific solutions provided by the utility model are as follows:

[0006] A battery pack waterproof structure comprises a shell and an upper cover connected to the shell, an installation cavity is formed between the shell and the upper cover, and a first frame is arranged in the installation cavity;

[0007] A U-shaped groove is formed between the outer wall of the first frame and the inner wall of the shell, and the U-shaped groove is filled with glue. A plurality of first protruding ribs are arranged at the lower end of the upper cover at a position corresponding to the U-shaped groove, and the plurality of first protruding ribs are inserted into the U-shaped groove to allow the glue to flow and fill the gaps between the first frame, the shell and the upper cover.

[0008] In some embodiments, an L-shaped groove is formed on the outer wall of the first frame, and the L-shaped groove includes a first side wall and a second side wall that are perpendicular to each other, and the first side wall is parallel to the inner wall of the shell. A U-shaped groove is formed between the first side wall, the second side wall and the inner wall of the shell, and glue is filled in the U-shaped groove to form a sealed and waterproof structure to achieve a protective effect for the battery pack.

[0009] In some embodiments, a plurality of second protruding ribs are provided on the first side wall, which can improve the strength of the first frame and reduce the amount of glue used, and can also play a guiding role in the process of filling glue, so that the glue can better penetrate into the gap between the first frame and the inner wall of the shell, thereby achieving better sealing and waterproofing effect.

[0010] In some embodiments, a plurality of notches are formed on the first side wall, which play a guiding role in the process of filling glue, so that the glue can better penetrate into the gap between the first frame and the inner wall of the shell, thereby achieving a better sealing and waterproof effect.

[0011] In some embodiments, a positioning notch for mounting and connecting with the shell is formed on the second side wall, and a positioning protrusion for matching with the positioning notch is formed on the inner side wall of the shell. Through the alignment relationship between the positioning notch and the positioning protrusion, a quick assembly effect of the first frame is achieved.

[0012] In some embodiments, a limiter is provided in the shell for limiting the installation depth of the first frame, so as to limit the installation depth of the first frame to better control the insertion of the first protruding rib into the U-shaped groove, so that the glue flows and fills the gap between the first frame, the shell and the upper cover.

[0013] In some embodiments, a first positioning hole is formed on the shell, and a second positioning hole matching the first positioning hole is formed on the upper cover. Locking screws are passed through the first positioning hole and the second positioning hole to achieve a fastened assembly effect between the shell and the upper cover, and also to achieve a detachable effect between the shell and the upper cover.

[0014] In some embodiments, a third protruding rib is disposed on the inner wall or the outer wall of the shell to improve the pressure-bearing strength of the inner wall of the shell, thereby improving the pressure-bearing strength of the battery pack.

[0015] In some embodiments, the glue is a silicone sealant, which has both an adhesive effect and is easy to remove, so that the battery pack can be disassembled and repaired.

[0016] The utility model also provides a battery pack, comprising a battery cell assembly and any one of the above described battery pack waterproof structures;

[0017] The battery core assembly is arranged in the installation cavity, which has the advantages of using less glue and not being limited by the thickness of the shell wall.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: a battery pack waterproof structure and a battery pack provided by the utility model are provided, by setting a first frame in the installation cavity, forming a U-shaped groove between the outer wall of the first frame and the inner wall of the shell, and after filling the U-shaped groove with glue, inserting the first protruding rib extending from the upper cover, and utilizing the first protruding rib to make the glue flow and fill the gap between the first frame, the shell and the upper cover, thereby achieving a sealing and waterproof effect, and is not limited by the wall thickness of the shell, and requires a small amount of glue, which effectively reduces production costs and is beneficial to weight control. At the same time, it is also convenient for rework processing and disassembly of the internal structure, and valuable battery cell components can be reused, which is suitable for the sealing and waterproof requirements of thin-walled shell battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a battery pack waterproof structure provided in Embodiment 1 of the present utility model;

[0020] Figure 2 for Figure 1 Section view in the AA direction;

[0021] Figure 3 An exploded view of a battery pack waterproof structure provided in Embodiment 1 of the present utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the first frame and the shell provided in the second embodiment of the present utility model;

[0023] Figure 5 This is a front view of a battery pack waterproof structure provided in Embodiment 3 of the present utility model;

[0024] Figure 6 for Figure 5 Section view in the AA direction;

[0025] Figure 7 An exploded view of a battery pack waterproof structure provided in Embodiment 3 of the present utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the first frame and the shell provided in the third embodiment of the present utility model;

[0027] 1-housing; 101-first positioning hole;

[0028] 2-upper cover; 201-second positioning hole;

[0029] 3-Install the cavity;

[0030] 4- First border;

[0031] 5- Glue;

[0032] 6- first protruding rib;

[0033] 7-L-shaped groove; 71-first side wall; 72-second side wall;

[0034] 8- second protruding rib;

[0035] 9- notch;

[0036] 10- Positioning notch;

[0037] 11- positioning protrusion;

[0038] 12-limiting piece;

[0039] 13-Locking screw;

[0040] 14- third protruding rib;

[0041] 15-Battery cell assembly. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0044] For example, a waterproof structure of a battery pack includes a shell and an upper cover connected to the shell cover, an installation cavity is formed between the shell and the upper cover, and a first frame is arranged in the installation cavity; a U-shaped groove is formed between the outer wall of the first frame and the inner wall of the shell, and the U-shaped groove is filled with glue, and a plurality of first protruding ribs are arranged at the lower end of the upper cover at the position corresponding to the U-shaped groove, and the plurality of first protruding ribs are inserted into the U-shaped groove to allow the glue to flow and fill the gaps between the first frame, the shell and the upper cover.

[0045] A battery pack waterproof structure and a battery pack provided in this embodiment form a U-shaped groove between the outer wall of the first frame and the inner wall of the shell. After the U-shaped groove is filled with glue, the first protruding rib extending from the upper cover is inserted to fill the gap with glue to achieve a sealing and waterproof effect. A small amount of glue is used and is not limited by the wall thickness of the shell. It is suitable for the sealing and waterproof requirements of thin-walled shell battery packs.

[0046] Embodiment 1:

[0047] like Figure 1-Figure 3 As shown, a waterproof structure of a battery pack includes a shell 1 and an upper cover 2 connected to the shell 1. It can be understood that the shell 1 can be a rectangular or cylindrical shape, with an opening for loading the battery cell assembly 15, and the upper cover 2 is covered at the opening of the shell 1 to form a sealed installation cavity 3 between the upper cover 2 and the shell 1.

[0048] A first frame 4 is arranged in the installation cavity 3, a U-shaped groove is formed between the outer wall of the first frame 4 and the inner wall of the shell 1, the U-shaped groove is filled with glue 5, and a plurality of first protruding ribs 6 are arranged at the position corresponding to the U-shaped groove at the lower end of the upper cover 2. The plurality of first protruding ribs 6 are inserted into the U-shaped groove to allow the glue 5 to flow and fill the gaps between the first frame 4, the shell 1 and the upper cover 2.

[0049] For example, four first protruding ribs 6 are formed at the lower end of the edge of the upper cover 2, and the four first protruding ribs 6 are evenly spaced and distributed at the edge of the upper cover 2. The length of the first protruding rib 6 protruding from the upper cover 2 is less than the depth of the U-shaped groove, so that the first protruding rib 6 can be fully inserted into the U-shaped groove, and play a certain role in squeezing and causing the glue 5 in the U-shaped groove. At the same time, the glue 5 in the U-shaped groove and the first protruding rib 6 can also be used to achieve a tight connection between the upper cover 2 and the shell 1. Of course, the specific structure, position and number of the first protruding rib 6 are not limited here, and can be adjusted according to actual needs, as long as the first protruding rib 6 can be inserted into the U-shaped groove, and play a certain role in squeezing and causing the glue 5 in the U-shaped groove.

[0050] During the specific assembly, the first frame 4 is installed through the opening of the shell 1 to form a U-shaped groove between the outer wall of the first frame 4 and the inner wall of the shell 1. Then, glue 5 is filled in the U-shaped groove. After the filling is completed, the upper cover 2 is placed on the opening of the shell 1, and the first protruding rib 6 is inserted into the U-shaped groove. Since the first protruding rib 6 occupies part of the space in the U-shaped groove, it will cause the glue 5 to flow, so that the glue 5 penetrates and fills the gaps between the first frame 4, the shell 1 and the upper cover 2, such as the gap between the outer wall of the first frame 4 and the inner wall of the shell 1, and the gap between the edge of the opening of the shell 1 and the edge of the upper cover 2.

[0051] A battery pack waterproof structure and a battery pack provided in this example are provided, by setting a first frame 4 in the installation cavity 3, forming a U-shaped groove between the outer wall of the first frame 4 and the inner wall of the shell 1, filling the U-shaped groove with glue 5, and inserting the first protruding rib 6 extending from the upper cover 2, and using the first protruding rib 6 to make the glue 5 flow and fill the gap between the first frame 4, the shell 1 and the upper cover 2, so as to achieve a sealing and waterproof effect, and is not limited by the wall thickness of the shell 1, and the amount of glue required is small, which effectively reduces the production cost and is conducive to weight control. At the same time, it is also convenient for rework processing and disassembly of the internal structure, and the valuable battery cell components 15 can be reused, which is suitable for the sealing and waterproof requirements of battery packs with thin-walled shells 1.

[0052] Embodiment 2:

[0053] refer to Figure 4 In this example, an L-shaped groove 7 is formed on the outer wall of the first frame 4, and the L-shaped groove 7 includes a first side wall 71 and a second side wall 72 which are perpendicular to each other. The first side wall 71 is parallel to the inner wall of the shell 1. A U-shaped groove is formed between the first side wall 71, the second side wall 72 and the inner wall of the shell 1, and glue 5 is filled in the U-shaped groove to form a sealed and waterproof structure to achieve a protective effect on the battery pack.

[0054] An L-shaped groove 7 is formed on the outer wall of the first frame 4 to ensure that a portion of the inner wall of the shell 1 relative to the first side wall 71 is the contact surface between the shell 1 and the glue 5, thereby ensuring the bonding effect between the glue 5 and the shell 1. At the same time, it also ensures that there is enough contact surface between the first frame 4 and the glue 5, so that after the first protruding rib 6 is inserted into the U-shaped groove, a sealing and waterproof effect can be established between the first frame 4, the shell 1 and the upper cover 2 through the glue 5.

[0055] In this example, a plurality of second protruding ribs 8 are provided on the first side wall 71. On the one hand, the second protruding ribs 8 can improve the strength of the first frame 4 and reduce the amount of glue 5 used. On the other hand, they can also play a guiding role in the process of filling the glue 5, so that the glue 5 can better penetrate into the gap between the first frame 4 and the inner wall of the shell 1, thereby achieving better sealing and waterproofing effect.

[0056] For example, the shell 1 is a rectangular structure, the first frame 4 is a square structure, the second protruding ribs 8 can be ten or twenty, and the two second protruding ribs 8 are evenly spaced on the first side wall 71. Since the first frame 4 is a square structure, the first side wall 71 is a square side wall, and the second protruding ribs 8 are evenly spaced around the square side wall.

[0057] A battery pack waterproof structure provided in this example utilizes a U-shaped groove formed between the first side wall 71, the second side wall 72 and the inner wall of the shell 1 to ensure the contact surface between the glue 5 and the first frame 4 and the shell 1, so as to ensure that a sealing and waterproof effect is established between the first frame 4, the shell 1 and the upper cover 2 through the glue 5, and a plurality of second protruding ribs 8 are arranged on the first side wall 71, which serve to increase the strength of the first frame 4, reduce the amount of glue 5, and have a diversion effect when filling the glue 5, thereby achieving a better sealing and waterproof effect.

[0058] Embodiment three:

[0059] refer to Figure 5-Figure 8 In this example, a plurality of notches 9 are formed on the first side wall 71, which play a guiding role in the process of filling the glue 5, so that the glue 5 can better penetrate into the gap between the first frame 4 and the inner wall of the shell 1, thereby achieving a better sealing and waterproof effect.

[0060] For example, the housing 1 is a cylindrical structure, the first frame 4 is an annular structure, the number of the notch portions 9 is six, and the six notch portions 9 are evenly spaced and formed on the annular side wall.

[0061] In some embodiments, a positioning notch 10 for installation and connection with the shell 1 is formed on the second side wall 72, and a positioning protrusion 11 for matching with the positioning notch 10 is formed on the inner wall of the shell 1. Through the alignment relationship between the positioning notch 10 and the positioning protrusion 11, a quick assembly effect of the first frame 4 is achieved.

[0062] For example, the number of positioning notches 10 and positioning protrusions 11 are six, and the six positioning notches 10 match the six positioning protrusions 11 one by one, so that the first frame 4 can utilize the alignment relationship between the positioning notches 10 and the positioning protrusions 11 to be accurately positioned in the installation cavity 3, thereby realizing a U-shaped groove structure formed between the inner wall of the shell 1.

[0063] A stopper 12 for limiting the installation depth of the first frame 4 is provided in the housing 1 to limit the installation depth of the first frame 4, so as to better control the first protruding rib 6 to be inserted into the U-shaped groove, so that the glue 5 flows and fills the gap between the first frame 4, the housing 1 and the upper cover 2. The stopper 12 can be an independent waterproof plate located inside the housing 1, or it can be a stopper structure formed by other component structures installed inside the housing 1 and capable of limiting the installation depth of the first frame 4.

[0064] A first positioning hole 101 is provided on the shell 1, and a second positioning hole 201 matching the first positioning hole 101 is provided on the upper cover 2. Locking screws 13 are inserted into the first positioning hole 101 and the second positioning hole 201 to achieve a fastening and assembly effect between the shell 1 and the upper cover 2, and also to achieve a detachable effect between the shell 1 and the upper cover 2.

[0065] A third protruding rib 14 is provided on the inner wall or outer wall of the housing 1 to improve the pressure-bearing strength of the inner wall of the housing 1, thereby improving the pressure-bearing strength of the battery pack. For example, the third protruding rib 14 is formed on the inner wall of the housing 1, and there are multiple third protruding ribs 14, and the third protruding ribs 14 are evenly spaced.

[0066] In order to facilitate the separation of the upper cover 2 and the shell 1 during the disassembly and repair process of the battery pack, the glue 5 is a silicone sealant. The silicone sealant has an adhesive effect to ensure the sealing and waterproof effect formed between the first frame 4, the shell 1 and the upper cover 2. At the same time, it is also easy to remove, so that the upper cover 2 and the shell 1 are easy to disassemble during the repair process.

[0067] Embodiment 4:

[0068] refer to Figure 2 The utility model also provides a battery pack, which includes a battery cell assembly 15 and a battery pack waterproof structure in any of the above embodiments. The battery cell assembly 15 is arranged in the installation cavity 3. By arranging a first frame 4 in the installation cavity 3, a U-shaped groove is formed between the outer wall of the first frame 4 and the inner wall of the shell 1. After the glue 5 is filled in the U-shaped groove, the first protruding rib 6 extending from the upper cover 2 is inserted to fill the gap with the glue 5 to achieve a sealing and waterproof effect. The amount of glue used is small and is not limited by the wall thickness of the shell 1. It is suitable for the sealing and waterproof requirements of the battery pack with a thin-walled shell 1.

[0069] In summary, the utility model provides a battery pack waterproof structure and a battery pack, which form a U-shaped groove between the outer wall of the first frame and the inner wall of the shell by setting a first frame in the installation cavity, and after filling the U-shaped groove with glue, insert the first protruding rib extending from the upper cover, and use the first protruding rib to make the glue flow and fill the gap between the first frame, the shell and the upper cover to achieve a sealing and waterproof effect. It is not limited by the wall thickness of the shell, and the amount of glue required is small, which effectively reduces the production cost and is beneficial to weight control. It is also convenient for rework and disassembly of the internal structure, and valuable battery cell components can be reused. It is suitable for the sealing and waterproof needs of thin-walled shell battery packs.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0072] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

Claims

1. A battery pack waterproof structure, It is characterized in that It comprises a shell (1) and an upper cover (2) connected to the shell (1), an installation cavity (3) is formed between the shell (1) and the upper cover (2), and a first frame (4) is arranged in the installation cavity (3); A U-shaped groove is formed between the outer wall of the first frame (4) and the inner wall of the shell (1), and the U-shaped groove is filled with glue (5). A plurality of first protruding ribs (6) are arranged at the lower end of the upper cover (2) at positions corresponding to the U-shaped groove. The plurality of first protruding ribs (6) are inserted into the U-shaped groove so that the glue (5) flows and fills the gaps between the first frame (4), the shell (1) and the upper cover (2).

2. The battery pack waterproof structure according to claim 1, It is characterized in that An L-shaped groove (7) is formed on the outer side wall of the first frame (4), and the L-shaped groove (7) comprises a first side wall (71) and a second side wall (72) which are perpendicular to each other, and the first side wall (71) is parallel to the inner side wall of the shell (1).

3. The battery pack waterproof structure according to claim 2, It is characterized in that A plurality of second protruding ribs (8) are provided on the first side wall (71).

4. The battery pack waterproof structure according to claim 2, It is characterized in that A plurality of notch portions (9) are formed on the first side wall (71).

5. The battery pack waterproof structure according to claim 3 or 4, It is characterized in that The second side wall (72) is formed with a positioning notch (10) for mounting and connecting with the shell (1), and the inner side wall of the shell (1) is formed with a positioning protrusion (11) for matching with the positioning notch (10).

6. The battery pack waterproof structure according to claim 1, It is characterized in that A limiting member (12) for limiting the installation depth of the first frame (4) is arranged in the housing (1).

7. The battery pack waterproof structure according to claim 1, It is characterized in that The shell (1) is provided with a first positioning hole (101), the upper cover (2) is provided with a second positioning hole (201) matching the first positioning hole (101), and locking screws (13) are inserted into the first positioning hole (101) and the second positioning hole (201).

8. The battery pack waterproof structure according to claim 1, It is characterized in that A third protruding rib (14) is provided on the inner wall or the outer wall of the shell (1).

9. The battery pack waterproof structure according to claim 1, It is characterized in that The glue (5) is a silicone sealant.

10. A battery pack, It is characterized in that A battery pack waterproof structure comprising a battery cell assembly and any one of claims 1 to 9; The battery core assembly (15) is arranged in the installation cavity (3).

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