Waterproof plug assembly of upper cover of battery pack and battery pack

Abstract

The utility model provides a battery pack upper cover waterproof plug assembly and a battery pack, a fixed plug comprises a fixed plate and a plugging part located at one side of the fixed plate, the lower surface of the fixed plate is provided with a first assembling part, a waterproof piece comprises a bottom plate, an upper cover plate and a connecting part, and the connecting part can be bent to enable the upper cover plate to be opposite to the bottom plate in position. A penetrating through hole is formed in the center of the bottom plate, the fixing plate is located between the bottom plate and the upper cover plate, the inserting part penetrates through the through hole, a second assembling part is arranged on the surface, close to the fixing plate, of the bottom plate, and more uniform pressure is formed on the bottom plate of the waterproof part through concave-convex matching of the first assembling part and the second assembling part. The plane of the bottom plate, the plane of the fixing plate for fixing the plug and the plane of the upper cover of the battery pack are tightly attached, the waterproof failure risk caused by uneven stress of the waterproof part is avoided, the upper cover plate covers the fixing plate and the inserting part, and the waterproof performance can be further improved.

Description

[Technical Field]

[0001] This utility model relates to the field of battery technology, and in particular to a waterproof plug assembly for a battery pack cover and a battery pack. [Background Technology]

[0002] The growing consumer demand is driving the large-scale application of lithium battery products in the two-wheeled vehicle sector. The application markets in different regions represent the increasing application scenarios of lithium battery products in the two-wheeled vehicle sector, which also puts forward higher requirements for the performance of lithium battery products. Among them, lithium batteries, as the power source of electric two-wheeled vehicles, are key components of electric two-wheeled vehicles, and the sealing of the battery in two-wheeled vehicles is a problem that needs to be solved for the entire battery pack.

[0003] Currently, the battery packs used in two-wheeled electric vehicles on the market are as follows: Figure 1 The 2+6 pin connector shown uses a combination of bolt fixing and sealing gaskets to ensure the battery pack connector is waterproof. Specifically, two screws pass through bolt holes on both sides of the connector to fix the connector and sealing gasket to the battery cover. The sealing gasket is located between the lower surface of the connector and the upper cover. The upper surface of the connector has no waterproof measures, resulting in poor waterproof performance. Furthermore, the middle of the connector is not fixed, causing uneven stress on the sealing gasket and incomplete compression, which further affects the waterproof performance of the product.

[0004] Therefore, it is necessary to provide a new type of waterproof plug assembly for the battery pack cover and the battery pack to overcome the above-mentioned defects. [Utility Model Content]

[0005] The purpose of this utility model is to provide a waterproof plug assembly for a battery pack cover and a battery pack, so as to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, in a first aspect, this utility model provides a waterproof plug assembly for a battery pack cover, including a fixing plug and a waterproof component; the fixing plug includes a fixing plate and a plug-in portion located on one side of the fixing plate, the fixing plate includes an upper surface and a lower surface opposite to the upper surface, the fixing plate has a plurality of first bolt holes, the first bolt holes penetrating the upper surface and the lower surface; the waterproof component includes a base plate, an upper cover plate and a connecting portion connecting the base plate and the upper cover plate, the connecting portion can be bent so that the upper cover plate and the base plate are positioned opposite each other, the base plate has a through hole in its center, the base plate also has a plurality of through second bolt holes; the fixing plate is located between the base plate and the upper cover plate, and the plug-in portion passes through the through hole, the second bolt holes are positioned opposite to the first bolt holes, the fixing plug and the waterproof component can be fixed to the battery pack cover by bolts passing through the first bolt holes and the second bolt holes in sequence; the lower surface of the fixing plate is provided with a first mounting portion, and the surface of the base plate near the fixing plate is provided with a second mounting portion, the first mounting portion and the second mounting portion having a concave-convex fit.

[0007] In a preferred embodiment, the first mounting portion is an annular groove surrounding the insertion portion, and the second mounting portion is an annular protrusion holding the protrusion within the groove.

[0008] In a preferred embodiment, the lower surface of the fixing plate is provided with a plurality of limiting blocks, and the bottom plate is provided with a plurality of limiting holes, the limiting holes being positioned opposite to the limiting blocks and the limiting blocks passing through the limiting holes.

[0009] In a preferred embodiment, the limiting block is located between adjacent first bolt holes, and the limiting hole is located between adjacent second bolt holes.

[0010] In a preferred embodiment, a recess is formed at the center of the fixing plate, and the insertion portion includes a positive terminal and a negative terminal, which are located within the recess; a flange is provided on the surface of the upper cover plate near the fixing plate, the flange is engaged within the recess and abuts against the positive terminal and the negative terminal.

[0011] In a preferred embodiment, the top cover plate further extends to form a semi-circular gripper portion.

[0012] In a preferred embodiment, the waterproof component is a rubber waterproof component.

[0013] Secondly, the present invention provides a battery pack, including a plurality of batteries, a housing and a top cover, wherein the housing has a receiving space, the plurality of batteries are received in the receiving space, the top cover is disposed on the housing and the top cover seals the receiving space, and the top cover is provided with a waterproof plug assembly for the battery pack top cover as described in any one of the first aspects.

[0014] Compared to existing technologies, the waterproof plug assembly and battery pack provided by this utility model include a fixed plug comprising a fixed plate and a plug-in portion located on one side of the fixed plate. The fixed plate has several first bolt holes penetrating the upper and lower surfaces. A first mounting portion is provided on the lower surface of the fixed plate. The waterproof component includes a base plate, an upper cover plate, and a connecting portion connecting the base plate and the upper cover plate. The connecting portion can be bent to make the upper cover plate and the base plate align. A through hole is provided in the center of the base plate. The base plate also has several through second bolt holes. The fixed plate is located between the base plate and the upper cover plate, and the plug-in portion passes through the through hole. The second bolt holes are connected to the first... With bolt holes positioned opposite each other, the fixing plug and waterproof component can be fixed to the battery pack cover by passing bolts through the first bolt hole and the second bolt hole in sequence. A second mounting part is provided on the surface of the base plate near the fixing plate. The first mounting part and the second mounting part cooperate to form a more uniform pressure on the base plate of the waterproof component, so that the plane of the base plate, the plane of the fixing plate of the fixing plug and the plane of the battery pack cover form a tight fit, thereby forming a stable waterproof sealing layer. This avoids the risk of waterproof failure caused by uneven stress on the waterproof component. Furthermore, the top cover plate covers the fixing plate and the plug-in part, which can further improve the waterproof performance. [Attached Image Description]

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural diagram of a 2+6 pin-shaped plug in the prior art;

[0017] Figure 2 A structural diagram of the waterproof plug assembly for the battery pack cover provided by this utility model;

[0018] Figure 3 An exploded structural diagram of the waterproof plug assembly for the battery pack cover provided by this utility model;

[0019] Figure 4 Partial structural diagram of the waterproof plug assembly for the battery pack cover provided by this utility model;

[0020] Figure 5 This is another exploded structural diagram of the waterproof plug assembly for the battery pack cover provided by this utility model.

Detailed Implementation Methods

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations. 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 to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] Please see Figure 2 This is a structural diagram of the waterproof plug assembly 100 for the battery pack cover provided by this utility model. The waterproof plug assembly 100 for the battery pack cover provided by this utility model can form a stable waterproof sealing structure, avoiding the risk of waterproof failure caused by uneven stress on the fixing structure of existing plugs, and reducing the risk of safety accidents due to water ingress into the battery pack. Specifically, the waterproof plug assembly 100 includes a fixing plug 10 and a waterproof component 20.

[0023] Please refer to the following: Figures 3 to 5 The fixed plug 10 includes a fixed plate 11 and a plug-in portion 12 located on one side of the fixed plate 11. The fixed plate 11 and the plug-in portion 12 are integrally formed. The fixed plate 11 can be fixed to the battery pack cover, and the plug-in portion 12 can serve as a bridge connecting the battery pack to an external power source or external load. The fixed plate 11 includes an upper surface 111 and a lower surface 112 opposite to the upper surface 111. The fixed plate 11 has a plurality of first bolt holes 113, which penetrate the upper surface 111 and the lower surface 112. The lower surface 112 of the fixed plate 11 is provided with a first assembly portion 114, which is used for assembly with the waterproof component 20.

[0024] The waterproof component 20 includes a base plate 21, a top cover plate 22, and a connecting portion 23 connecting the base plate 21 and the top cover plate 22. The connecting portion 23 can be bent towards the base plate 21 so that the top cover plate 22 is positioned opposite the base plate 21. Alternatively, the connecting portion 23 can be bent away from the base plate 21 so that the top cover plate 22 is away from the base plate 21, thereby opening the top cover plate of the waterproof component 20 to connect an external power source or external load using a fixed plug. The base plate 21 has a through hole 211 at its center and several through bolt holes 212. Specifically, the base plate 21, top cover plate 22, and connecting portion 23 are integrally formed. The waterproof component 20 is a rubber waterproof component with a certain degree of elasticity and excellent sealing performance.

[0025] Furthermore, the fixing plate 11 is located between the base plate 21 and the upper cover plate 22, and the plug-in part 12 passes through the through hole 211, that is, the upper cover plate 22 covers the fixing plate 11 and the plug-in part 12. The second bolt hole 212 is opposite to the first bolt hole 113. By passing bolts through the first bolt hole 113 and the second bolt hole 212 in sequence, the fixing plug 10 and the waterproof component 20 can be fixed to the battery pack cover. Furthermore, a second mounting portion 213 is provided on the surface of the base plate 21 near the fixing plate 11. The first mounting portion 114 and the second mounting portion 213 are in a concave-convex fit. Through the concave-convex fit between the first mounting portion 114 and the second mounting portion 213, when the fixing plug 10 and the waterproof component 20 are fixed to the battery pack cover with bolts passing through the first bolt hole 113 and the second bolt hole 212, the concave-convex fit structure can form a more uniform pressure on the base plate 21 of the waterproof component 20, so that the plane of the base plate 21, the plane of the fixing plate 11 of the fixing plug 10 and the plane of the battery pack cover form a tight fit, thereby forming a stable waterproof sealing layer, achieving the design intention of waterproof plug and improving waterproof performance.

[0026] Therefore, the waterproof plug assembly 100 for the battery pack cover provided by this utility model includes a fixed plug 10 comprising a fixed plate 11 and a plug-in portion 12 located on one side of the fixed plate 11. The fixed plate 11 has a plurality of first bolt holes 113 penetrating the upper surface 111 and the lower surface 112. The lower surface 112 of the fixed plate 11 is provided with a first assembly portion 114. The waterproof component 20 includes a base plate 21, an upper cover plate 22, and a connecting portion 23 connecting the base plate 21 and the upper cover plate 22. The connecting portion 23 can be bent so that the upper cover plate 22 and the base plate 21 are positioned opposite each other. The center of the base plate 21 has a through hole 211, and the base plate 21 also has a plurality of through second bolt holes 212. The fixed plate 11 is located between the base plate 21 and the upper cover plate 22, and the plug-in portion 12 passes through the through hole 211. The second bolt hole 212 is positioned opposite to the first bolt hole 113. By passing bolts through the first bolt hole 113 and the second bolt hole 212 in sequence, the fixing plug 10 and the waterproof component 20 can be fixed to the battery pack cover. The bottom plate 21 is provided with a second mounting part 213 near the fixing plate 11. The first mounting part 114 and the second mounting part 213 are in concave-convex cooperation, which forms a more uniform pressure on the bottom plate 21 of the waterproof component 20. This makes the plane of the bottom plate 21, the plane of the fixing plate 11 of the fixing plug 10 and the plane of the battery pack cover fit tightly together, thereby forming a stable waterproof sealing layer. This avoids the risk of waterproof failure caused by uneven stress on the waterproof component. Furthermore, the top cover plate 22 covers the fixing plate 11 and the plug-in part 12, which can further improve the waterproof performance.

[0027] In some embodiments, the first mounting portion 114 is an annular groove surrounding the plug portion 12, and the second mounting portion 213 is an annular protrusion that engages within the groove. Understandably, since the plug portion 12 is located at the center of the fixing plate 11, and the first mounting portion 114 surrounds the plug portion 12, the first mounting portion 114 is close to the center of the fixing plate. The first mounting portion 114 and the second mounting portion 213 engage together, creating uniform pressure during assembly. This ensures a tighter fit between the fixing plate 11 of the fixing plug 10 and the base plate 21 of the waterproof component 20, preventing uneven stress on the waterproof component and subsequent waterproofing failure. Specifically, there can be multiple first mounting portions 114 and second mounting portions 213, with multiple annular grooves corresponding one-to-one with multiple annular protrusions. These annular grooves and protrusions can, for example, be spiral-shaped.

[0028] Furthermore, the lower surface 112 of the fixing plate 11 is provided with a plurality of limiting blocks 115, and the base plate 21 is provided with a plurality of limiting holes 214. The limiting holes 214 are positioned opposite to the limiting blocks 115, and the limiting blocks 115 pass through the limiting holes 214. Specifically, the limiting blocks 115 are located between adjacent first bolt holes 113, and the limiting holes 214 are located between adjacent second bolt holes 212. By cooperating with the limiting holes 214, the limiting blocks 115 can play a limiting role during assembly, preventing positional displacement, and making the fixing plug 10 fit more tightly with the waterproof component 20, thereby enhancing the waterproof performance.

[0029] In some embodiments, a recess 116 is formed in the center of the fixing plate 11, and the plug-in portion 12 includes a positive terminal 121 and a negative terminal 122, which are located within the recess 116. A flange 221 is provided on the surface of the upper cover plate 22 near the fixing plate 11. The flange 221 is engaged within the recess 116 and abuts against the positive terminal 121 and the negative terminal 122. The flange 221 further prevents external impurities from contaminating the fixing plug 10 and further improves waterproof performance.

[0030] In this embodiment, the upper cover plate 22 also extends to form a semi-circular gripper portion 222. The gripper portion 222 is formed by the upper cover plate 22 extending along the horizontal plane and extends beyond the edge of the upper cover plate 22 that is aligned with the bottom plate 21. The gripper portion 222 is convenient for gripping when the upper cover plate is opened, making it more convenient to use.

[0031] When assembling the waterproof plug assembly 100 of the battery pack cover provided by this utility model onto the battery pack cover, first place the waterproof plug assembly 100 in the corresponding mounting hole on the cover, align the first bolt hole 113 and the second bolt hole 212 with the bolt holes of the cover to be fixed, and then fix the plug 10 and the waterproof component 20 in the cover with screws (fixed torque) to complete the plug installation.

[0032] The waterproof plug assembly 100 provided by this utility model achieves waterproofing by: when the plug 10 and waterproof component 20 are fixed to the battery pack cover, the cooperation between the limiting block 115 and the limiting hole 214 provides excellent positioning for the waterproof component; simultaneously, the first assembly part 114 and the second assembly part 213 engage in assembly and mutual compression to generate pressure. When the screws fix the plug 10 and waterproof component to the cover through the first bolt hole 113 and the second bolt hole 212, a uniform pressure is applied to the base plate 21 of the waterproof component 20, resulting in a tight fit between the rubber gasket plane of the waterproof component 20, the fixing plate plane of the plug, and the plane of the cover. Combined with the concave-convex fit of the first assembly part 114 and the second assembly part 213, a stable waterproof sealing layer is formed, thus achieving the design intent of a waterproof plug. This utility model improves the failure risk of existing 2+6 pin-shaped plug waterproof structures, while reducing operational difficulty and material costs, and lowering the risk of safety accidents due to waterproofing failure.

[0033] This utility model also provides a cylindrical battery, including a plurality of batteries, a housing, and a top cover. The housing has a receiving space in which the plurality of batteries are received. The top cover is disposed on the housing and seals the receiving space. The top cover is provided with a waterproof plug assembly 100 for the battery pack top cover as described in any of the above-mentioned embodiments. It should be noted that the embodiments of the waterproof plug assembly 100 for the battery pack top cover provided by this utility model are all applicable to the battery pack provided in this embodiment and can achieve the same / similar technical effects.

[0034] In summary, the waterproof plug assembly 100 for the battery pack cover and the battery pack provided by this utility model include a fixed plug 10 comprising a fixed plate 11 and a plug-in portion 12 located on one side of the fixed plate 11. The fixed plate 11 has a plurality of first bolt holes 113 penetrating the upper surface 111 and the lower surface 112. The lower surface 112 of the fixed plate 11 is provided with a first assembly portion 114. The waterproof component 20 includes a base plate 21, an upper cover plate 22, and a connecting portion 23 connecting the base plate 21 and the upper cover plate 22. The connecting portion 23 can be bent so that the upper cover plate 22 and the base plate 21 are positioned opposite each other. The center of the base plate 21 has a through hole 211, and the base plate 21 also has a plurality of through second bolt holes 212. The fixed plate 11 is located between the base plate 21 and the upper cover plate 22, and the plug-in portion 12 passes through the through hole 21. 1. The second bolt hole 212 is positioned opposite to the first bolt hole 113. By passing bolts through the first bolt hole 113 and the second bolt hole 212 in sequence, the fixing plug 10 and the waterproof component 20 can be fixed to the battery pack cover. The bottom plate 21 is provided with a second mounting part 213 near the fixing plate 11. The first mounting part 114 and the second mounting part 213 are in concave-convex cooperation, which forms a more uniform pressure on the bottom plate 21 of the waterproof component 20. This makes the plane of the bottom plate 21, the plane of the fixing plate 11 of the fixing plug 10 and the plane of the battery pack cover fit tightly together, thereby forming a stable waterproof sealing layer. This avoids the risk of waterproof failure caused by uneven stress on the waterproof component. Furthermore, the top cover plate 22 covers the fixing plate 11 and the plug-in part 12, which can further improve the waterproof performance.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A waterproof plug assembly for a battery pack cover, characterized in that, The device includes a fixed plug and a waterproof component. The fixed plug includes a fixed plate and a plug-in portion located on one side of the fixed plate. The fixed plate includes an upper surface and a lower surface opposite to the upper surface. The fixed plate has several first bolt holes that penetrate the upper and lower surfaces. The waterproof component includes a base plate, a top cover plate, and a connecting portion connecting the base plate and the top cover plate. The connecting portion can be bent so that the top cover plate is positioned opposite the base plate. The base plate has a through hole in its center and several through second bolt holes. The fixed plate is located between the base plate and the top cover plate, and the plug-in portion passes through the through hole. The second bolt holes are opposite to the first bolt holes. The fixed plug and the waterproof component can be fixed to the battery pack cover by bolts passing through the first and second bolt holes in sequence. The lower surface of the fixed plate has a first mounting portion, and the surface of the base plate near the fixed plate has a second mounting portion. The first mounting portion and the second mounting portion are in a concave-convex fit.

2. The waterproof plug assembly for the battery pack cover as described in claim 1, characterized in that, The first assembly part is an annular groove surrounding the insertion part, and the second assembly part is an annular protrusion that is held in the groove.

3. The waterproof plug assembly for the battery pack cover as described in claim 1, characterized in that, The lower surface of the fixing plate is provided with a plurality of limiting blocks, and the bottom plate is provided with a plurality of limiting holes, the limiting holes being opposite to the limiting blocks and the limiting blocks passing through the limiting holes.

4. The waterproof plug assembly for the battery pack cover as described in claim 3, characterized in that, The limiting block is located between adjacent first bolt holes, and the limiting hole is located between adjacent second bolt holes.

5. The waterproof plug assembly for the battery pack cover as described in claim 1, characterized in that, The center of the fixing plate is recessed, and the plug-in part includes a positive terminal and a negative terminal, which are located in the recess. The surface of the upper cover plate near the fixing plate is provided with a flange, which is engaged in the recess and abuts against the positive terminal and the negative terminal.

6. The waterproof plug assembly for the battery pack cover as described in claim 1, characterized in that, The top cover plate also extends to form a semi-circular gripper.

7. The waterproof plug assembly for the battery pack cover as described in any one of claims 1-6, characterized in that, The waterproof component is a rubber waterproof component.

8. A battery pack, characterized in that, The device includes several batteries, a housing, and a top cover. The housing has a receiving space in which several batteries are received. The top cover is disposed on the housing and seals the receiving space. The top cover is provided with a waterproof plug assembly for the battery pack top cover as described in any one of claims 1-7.

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