A waterproof battery box, battery module and electric bicycle

Abstract

The utility model discloses a waterproof battery box, battery module and electric bicycle relates to battery waterproof technical field. Waterproof battery box includes: casing, waterproof cover, casing includes and mutually buckling first casing and second casing along first direction, waterproof cover is located between first casing with second casing, and is connected with first casing and second casing respectively, wherein, the outer edge ring of waterproof cover is equipped with flange, and the flange forms the glue groove for filling sealant with the inner wall of second casing. By adopting the technology provided by the utility model, double protection can be provided for battery core, and the processing and assembling difficulty can be effectively reduced while ensuring the waterproof effect.

Description

Technical Field

[0001] This utility model relates to the field of battery waterproofing technology, specifically to a waterproof battery box, battery module, and electric bicycle. Background Technology

[0002] With technological advancements and increasing demand for convenient transportation, electric bicycles, with their advantages of convenience and economy, are gradually meeting the needs of short-distance urban travel. Since electric bicycles primarily use lithium and lead-acid batteries, the demand for battery waterproofing is also increasing. Currently, the waterproofing design of electric bicycles mainly involves adding sealing materials, such as rubber sealing rings or sealant, to the interface between the two casings of the battery. However, this type of waterproofing design has relatively low reliability, especially when the electric bicycle is involved in a collision or drop, the battery casing or the interface between the two casings is easily damaged, causing the battery waterproofing to fail.

[0003] Based on this, some manufacturers improve the battery's waterproof performance by increasing the sealing strength at the interface between the two casings. For example, Chinese utility model patent (CN214625264U) discloses a sheet metal casing for a battery module with high waterproof performance. The specific solution involves folding down the outer edge of the casing cover to form a folded plate surface. The casing and casing cover are connected by side screws that pass through through holes and are screwed into threaded holes, and a ring of sealant is applied at the interface. While this method effectively improves the battery's waterproof sealing, its processing is more difficult, significantly increasing the difficulty of battery assembly. Utility Model Content

[0004] This invention provides a waterproof battery box, battery module, and electric bicycle to solve the problem of low waterproof reliability in existing battery waterproof designs.

[0005] To solve the above-mentioned technical problems, in a first aspect, the present invention provides a waterproof battery box, which includes: a shell and a waterproof cover.

[0006] The housing includes a first housing and a second housing that are interlocked along a first direction; the waterproof cover is located between the first housing and the second housing and is connected to the first housing and the second housing respectively; wherein, the outer edge of the waterproof cover is provided with a flange, and the flange and the inner wall of the second housing form a groove for filling sealant.

[0007] The beneficial effects of the technical solution provided by this utility model compared to the prior art are as follows:

[0008] By adding a waterproof cover between the first and second housings, the battery cell can be provided with double-layer protection. The protection is achieved by the waterproof cover and the battery cover (first housing) in sequence. When the battery is hit, the waterproof cover can reduce the impact on the first housing, thereby reducing the possible damage to the interface between the first and second housings and avoiding waterproof failure.

[0009] The waterproof cover has a flange on its outer edge. This flange, through a gap with the second housing, forms a sealant groove for filling with sealant. This allows for a tight connection between the waterproof cover and the housing (including the first and second housings) after sealant application, thus improving the battery box's sealing performance. Compared to the current bent design of housings (such as the second housing), this structure effectively reduces processing and assembly difficulty while ensuring waterproofing.

[0010] In some embodiments, the flange includes a first flange and a second flange. The first flange forms a first adhesive groove with the inner wall of the second housing. At least a portion of the first housing is embedded in the first adhesive groove, and the second flange forms a second adhesive groove communicating with the first adhesive groove with the inner wall of the second housing. This improves the waterproofness of any interface between the first housing, the waterproof cover, and the second housing.

[0011] Furthermore, the width of the first glue-applying groove is greater than the width of the second glue-applying groove.

[0012] Using the above technical solution, the width of the first glue-applying groove is greater than the width of the second glue-applying groove. That is, the glue-applying groove is set to a structure with a wider upper section and a narrower lower section. This way, when the first shell is impacted, the impact force is mainly concentrated on the sealant in the first glue-applying groove, reducing the impact on the sealant in the second glue-applying groove, thereby effectively reducing the risk of waterproof failure.

[0013] In some embodiments, the first flange and the second flange are located on opposite sides of the waterproof cover along the first direction.

[0014] Using the above technical solution, the first flange and the inner wall of the second housing can be pressed together to fill the gap between the three. Pressing the sealant can cause the adhesive in the first adhesive groove to overflow into the second adhesive groove. When the adhesive is cured, the three can be tightly connected and waterproof.

[0015] In some embodiments, the second flange is further provided with a third flange for abutting against the inner wall of the second housing. The third flange, the second flange, and the inner wall of the second housing form the second sealant groove to prevent excessive overflow of sealant.

[0016] In some embodiments, the waterproof cover further includes a plurality of bosses located along the first direction on the side of the waterproof cover facing the first housing. By employing the above technical solution, the bosses can act as reinforcing ribs, enhancing the structural strength of the waterproof cover.

[0017] In some embodiments, the second housing further includes a plurality of ribs circumferentially disposed on the inner wall of the second housing, wherein the ribs abut against the flange along the first direction.

[0018] Using the above technical solution, the ribs and the first housing press against each other along the first direction to create a waterproof cover, allowing for further compression of the sealant filling the adhesive groove during battery box assembly. After the sealant cures, the waterproof cover is clamped and locked by the ribs of the first and second housings, preventing displacement of the waterproof cover due to external impact.

[0019] In some embodiments, the first housing has multiple locking holes circumferentially, and the inner wall of the second housing has multiple protrusions corresponding to the locking holes. By employing this technical solution, locking the first and second housings along the first direction allows for a more regular overall shape of the enclosure and avoids affecting the filling of the sealant.

[0020] In a second aspect, this application also provides a battery module, including the aforementioned waterproof battery box and battery cell, wherein the battery cell is housed between a second housing and a waterproof cover.

[0021] By adopting the above technical solution, the double-layer protective structure formed by the first shell and the waterproof cover can effectively prevent damage at the junction of the first shell and the second shell, thereby preventing waterproof failure and effectively extending the battery's lifespan.

[0022] Thirdly, this application also provides an electric bicycle, including one or more of the aforementioned battery modules. By adopting the above technical solution, the battery modules of the electric bicycle possess superior waterproof performance and impact resistance, enabling them to adapt to various complex weather conditions and road conditions, thereby improving the overall reliability of the vehicle and the user experience. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of 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, wherein:

[0024] Figure 1 This is an exploded view of an embodiment of a waterproof battery box provided by this utility model;

[0025] Figure 2 This is a cutaway perspective view of an embodiment of a waterproof battery box provided by this utility model;

[0026] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0027] Figure 4 This utility model provides a Figure 2 A magnified view of part A in the middle;

[0028] Figure 5 This is a three-dimensional structural schematic diagram of an embodiment of a waterproof cover for a waterproof battery box provided by this utility model;

[0029] Figure 6 This is a cross-sectional view of an embodiment of a waterproof cover for a waterproof battery box provided by this utility model;

[0030] Figure 7 This is a perspective view of an embodiment of the second shell of a waterproof battery box provided by this utility model;

[0031] Figure 8 This is a perspective view of an embodiment of a waterproof battery box provided by this utility model.

[0032] In the picture:

[0033] 10. Housing; 11. First housing; 110. Locking hole; 111. Handle; 12. Second housing; 120. Rib; 121. Column; 20. Waterproof cover; 21. Flange; 210. First flange; 211. Second flange; 212. Third flange; 22. Glue groove; 220. First glue groove; 221. Second glue groove; 23. Boss. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0035] For ease of description, this application will first combine the following descriptions with the specific structures of the waterproof battery box, battery module, and electric bicycle. Figure 1A first direction (Z) is defined. This first direction refers to the height direction of the waterproof battery box, such as the Z-direction. It is worth noting that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more.

[0036] See Figures 1 to 4 As shown, Figure 1 An exploded view of one embodiment of a waterproof battery box provided in this application is shown; Figure 2 This paper shows a cutaway perspective view of an embodiment of a waterproof battery box provided in this application; Figure 3 for Figure 2 A magnified view of part A in the middle; Figure 4 A partial schematic diagram of one embodiment of a waterproof battery box provided in this application is shown.

[0037] In some embodiments, the waterproof battery box includes: a housing 10 and a waterproof cover 20. The housing 10 includes a first housing 11 and a second housing 12 that are interlocked along a first direction. The waterproof cover 20 is located between the first housing 11 and the second housing 12 and is connected to the first housing 11 and the second housing 12 respectively. The outer edge of the waterproof cover 20 is provided with a flange 21, and the flange 21 and the inner wall of the second housing 12 form a sealant groove 22 for filling with sealant.

[0038] In this embodiment of the application, by adding a waterproof cover 20 between the first housing 11 and the second housing 12, the battery cell can be provided with double-layer protection. The protection is achieved by the waterproof cover 20 and the first housing 11 in sequence. When the battery is hit, the waterproof cover 20 can reduce the impact on the first housing 11, thereby reducing the possible damage to the interface between the first housing 11 and the second housing 12 and avoiding waterproof failure.

[0039] In some applications, such as when the battery end cap (first housing 11) breaks, the waterproof cover 20 can be used as the battery end cap to protect the battery inside the second housing 12.

[0040] For example, combined Figure 4As shown, the outer edge of the waterproof cover 20 is provided with a flange 21, which includes a first flange 210 and a second flange 211. A sealant groove 22 is formed between the flange 21 and the second housing 12 to allow for the filling of sealant. This ensures a tight connection between the waterproof cover 20 and the first housing 11 and the second housing 12 after the sealant is filled, thereby improving the sealing performance of the battery box. Specifically, the first flange 210 and the inner wall of the second housing 12 form a first sealant groove 220, wherein at least a portion of the first housing 11 is embedded in the first sealant groove 220, and the second flange 211 and the inner wall of the second housing 12 form a second sealant groove 221 communicating with the first sealant groove 220. After the sealant cures, it effectively improves the waterproof performance of any interface between the first housing 11, the waterproof cover 20, and the second housing 12. Furthermore, the two-section sealant application enhances the overall sealant area, improving the waterproof reliability of the battery box.

[0041] In some implementations, the width of the first glue dispensing groove 220 is greater than the width of the second glue dispensing groove 221. For example, in combination with... Figure 2 and Figure 3 As shown, the width of the first glue-applying groove 220 is greater than the width of the second glue-applying groove 221, that is, the glue-applying groove 22 is set to a structure with a wider upper section and a narrower lower section (e.g., Figure 4 As shown, when the first housing 11 is impacted, the impact force is mainly concentrated on the sealant in the first sealant groove 220, reducing the impact on the sealant in the second sealant groove 221, thereby effectively reducing the risk of waterproof failure.

[0042] In some embodiments, the first flange 210 and the second flange 211 are located on opposite sides of the waterproof cover 20 along a first direction. Exemplarily, the first flange 210 and the inner wall of the second housing 12 can be pressed together and sealant can be filled into the gap between the three. Pressing the sealant can cause the adhesive in the first adhesive groove 220 to overflow into the second adhesive groove 221. After the adhesive cures, the three (first housing 11, second housing 12 and waterproof bracket) can be tightly connected and waterproofed.

[0043] In some implementation schemes, combined Figure 4 As shown, the second flange 211 is also provided with a third flange 212 for abutting against the inner wall of the second housing 12. The third flange 212, the second flange 211 and the inner wall of the second housing 12 form a second sealant groove 221 to prevent excessive overflow of sealant.

[0044] See Figure 5 As shown, Figure 5 A perspective structural schematic diagram of an embodiment of a waterproof cover 20 for a waterproof battery box provided in this application is shown.

[0045] In some embodiments, the waterproof cover 20 further includes a plurality of bosses 23, which are located along a first direction on the side of the waterproof cover 20 facing the first housing 11. In this embodiment, the bosses 23 can serve as reinforcing ribs to enhance the structural strength of the waterproof cover 20. For example, Figure 5 Two bosses 23 are shown, but this application does not limit the number of bosses 23; they can still be four, six, etc. The waterproof cover 20 has multiple recesses along its circumference, which are used to reserve space so that bolts can lock the first housing 11 and the second housing 12 in the first direction.

[0046] Furthermore, the waterproof cover 20 is also provided with slots for inserting wire harnesses to constrain the wire harnesses (such as busbar harnesses, current and voltage acquisition harnesses, etc.) that the battery cell needs to connect, thereby improving internal tidiness.

[0047] See Figures 6 to 7 As shown, Figure 6 A cross-sectional view is shown of an embodiment of a waterproof cover 20 for a waterproof battery box provided in this application; Figure 7 A perspective view of an embodiment of the second housing 12 of a waterproof battery box provided in this application is shown.

[0048] In some embodiments, the second housing 12 further includes a plurality of ribs 120 circumferentially disposed on the inner wall of the second housing 12, wherein the ribs 120 abut against the flange 21 in a first direction.

[0049] In this embodiment of the application, combined with Figure 4 and Figure 6 , Figure 7 As shown, the rib 120 and the first housing 11 press against each other along the first direction to prevent the waterproof cover 20 from shifting, so that the sealant filling the glue groove 22 can be further squeezed during battery box assembly. After the sealant cures, the waterproof cover 20 is clamped and locked by the rib 120 of the first housing 11 and the second housing 12 to prevent the waterproof cover 20 from shifting after being subjected to external impact.

[0050] Combination Figure 8 As shown, Figure 8 A perspective view of one embodiment of a waterproof battery box provided in this application is shown.

[0051] In some implementation schemes, combined Figure 7 and Figure 8 As shown, the first housing 11 is provided with a plurality of locking holes 110 along the circumference, and the inner wall of the second housing 12 is provided with a plurality of protrusions 121 corresponding to the locking holes 110. By locking the first housing 11 and the second housing 12 along the first direction, the overall shape of the box can be made more regular and the filling of the sealant can be avoided.

[0052] For example, the first housing 11 is also provided with a handle 111, which can be folded and accommodated in the upper groove of the first housing 11. The second housing 12 may also be made of metal to further improve the overall structural strength of the battery box.

[0053] In some embodiments, this application also provides a battery module including the aforementioned waterproof battery box and battery cell, with the battery cell housed between the second housing 12 and the waterproof cover 20.

[0054] In this embodiment, the double-layer protective structure formed by the first housing 11 and the waterproof cover 20 effectively prevents damage at the junction of the first housing 11 and the second housing 12, thereby preventing waterproofing failure and effectively extending the battery's lifespan.

[0055] In some embodiments, this application also provides an electric bicycle including one or more battery modules. In the embodiments of this application, by giving the battery module of the electric bicycle better waterproof performance and impact resistance, it can adapt to various complex weather conditions and road conditions, improving the reliability of the entire vehicle and the user experience.

[0056] 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, should be included within the protection scope of this utility model.

Claims

1. A waterproof battery box, characterized in that, include: The housing includes a first housing and a second housing that are interlocked together along a first direction; A waterproof cover is located between the first housing and the second housing, and is connected to both the first housing and the second housing respectively; The waterproof cover has a flange around its outer edge, which forms a groove for filling sealant with the inner wall of the second housing.

2. The waterproof battery box according to claim 1, characterized in that, The flange includes a first flange and a second flange. The first flange and the inner wall of the second housing form a first glue-applying groove. At least a portion of the first housing is embedded in the first glue-applying groove. The second flange and the inner wall of the second housing form a second glue-applying groove that communicates with the first glue-applying groove.

3. The waterproof battery box according to claim 2, characterized in that, The width of the first glue-applying groove is greater than the width of the second glue-applying groove.

4. The waterproof battery box according to claim 2, characterized in that, The first flange and the second flange are located on opposite sides of the waterproof cover along the first direction.

5. The waterproof battery box according to claim 2, characterized in that, The second flange is further provided with a third flange for abutting against the inner wall of the second housing, and the third flange, the second flange and the inner wall of the second housing form the second glue groove.

6. The waterproof battery box according to claim 1, characterized in that, The waterproof cover also includes a plurality of protrusions, which are located along the first direction on the side of the waterproof cover facing the first housing.

7. The waterproof battery box according to any one of claims 1 to 6, characterized in that, The second housing further includes a plurality of ribs circumferentially disposed on the inner wall of the second housing, wherein the ribs abut against the flange along the first direction.

8. The waterproof battery box according to any one of claims 1 to 6, characterized in that, The first housing has multiple locking holes circumferentially, and the inner wall of the second housing has multiple protrusions corresponding to the locking holes.

9. A battery module, characterized in that, The waterproof battery box according to any one of claims 1 to 8 further includes a battery cell housed between a second housing and a waterproof cover.

10. An electric bicycle, characterized in that, It includes one or more battery modules as described in claim 9.

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