Waterproof shell and battery pack thereof

Abstract

The utility model relates to the technical field of batteries, in particular to a waterproof shell and a battery pack thereof, the waterproof shell comprises a box body with a cavity and an upper cover covering the top of the box body, the upper cover extends downwards along the edge to form a convex part, a gap is formed between the outer side wall of the convex part and the side wall of the upper cover, and a sealing piece is arranged in the gap. One side face of the sealing piece is attached to the protruding part and the upper cover, and the other side face of the sealing piece is attached to the box body. The convex part is arranged on the bottom surface of the upper cover, and the sealing piece is arranged in the gap between the convex part and the side wall surface of the upper cover, so that one side surface of the sealing piece is attached to the outer side surface of the convex part and the bottom surface of the upper cover in the gap, and when the upper cover covers the box body, the other side surface of the sealing piece is attached to the inner side surface and the top surface of the box body to form a tightly closed shell structure; rainwater and other substances can be prevented from entering the shell, and the waterproof performance of the shell is improved. The utility model further discloses a battery pack.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a waterproof housing and a battery pack thereof. Background Art

[0002] As a core component of the power system of an electric motorcycle, the performance and development trend of the battery pack have an important impact on the overall performance and market competitiveness of the electric motorcycle; in the future, with the continuous progress of technology and the continuous development of the market, the electric motorcycle battery pack will develop in the direction of higher energy density, lighter weight, longer life, more intelligent and green environmental protection.

[0003] At present, the driving range of electric motorcycles is limited to a certain extent. To meet the market demand for a higher mileage, people often quickly replace multiple fully charged battery packs to achieve ultra-long mileage endurance; thus, a portable battery pack is required to improve the convenience of using the electric motorcycle. At the same time, a spare battery pack can be placed on the vehicle to cope with emergencies at any time. Of course, battery pack replacement cabinets can also be selected to be set up in some places.

[0004] However, in the actual application of life, it is often inevitable to encounter various bad weather such as rain. Although some battery packs can block water to a certain extent under the wrapping of the electric motorcycle, the waterproof performance of the housing of the battery pack itself is poor. When riding in the rain for a long time, it is easy to occur that the battery pack is short-circuited or burned after water enters. Summary of the Utility Model

[0005] One of the purposes of the present utility model is to provide a waterproof housing, aiming at the deficiencies existing in the above-mentioned prior art, and aiming to solve the technical problem of poor waterproof performance of the housing of the electric motorcycle.

[0006] To achieve the above purpose, the technical solution adopted by the present utility model is:

[0007] A waterproof housing includes a box body having a cavity and an upper cover covering the top of the box body. The upper cover extends downward along the edge to form a convex portion. There is a gap between the outer side wall of the convex portion and the side wall of the upper cover. A sealing member is arranged in the gap. One side surface of the sealing member is attached to the convex portion and the upper cover, and the other side surface of the sealing member is attached to the box body.

[0008] The present utility model is further arranged as: the sealing member includes a horizontal section and a vertical section fixedly connected to the horizontal section. The horizontal section and the vertical section are perpendicular to each other to form an "L" - shaped structure.

[0009] The present utility model is further arranged as: one side surface of the horizontal section is attached to the bottom surface of the upper cover, and the other side surface of the horizontal section is attached to the top surface of the box body to form a first sealing area.

[0010] The present utility model is further configured such that: one side surface of the vertical section is in contact with the outer side surface of the convex portion, and the other side surface of the vertical section is in contact with the inner wall of the box body to form a second sealing area.

[0011] The present utility model is further configured such that: the upper cover is provided with a plurality of first fixing holes, and each first fixing hole is provided with a fixing member. Correspondingly, the box body is provided with a plurality of second fixing holes, and the fixing member is inserted into the second fixing hole for fixation.

[0012] The present utility model is further configured such that: a plurality of third fixing holes are formed in the vertical section of the sealing member, and the first fixing holes, the third fixing holes, and the second fixing holes are arranged in sequence up and down on the same straight line so that the fixing member passes through the third fixing hole.

[0013] The present utility model is further configured such that: the convex portion is provided with a plurality of recessed positions, the sealing member is provided with a plurality of curved surface sections, and the box body is provided with a plurality of protruding strips. One side surface of the curved surface section is in contact with the recessed position, and the other side surface of the curved surface section is in contact with the protruding strip.

[0014] The present utility model is further configured such that: the upper cover, the sealing member, and the box body are sequentially attached to form a channel for draining accumulated water at the position corresponding to the sealing member.

[0015] The present utility model is further configured such that: at least one side surface of the box body is provided with a plurality of stripes, and the channel is communicated with the stripes.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] By providing a convex portion on the bottom surface of the upper cover and arranging a sealing member in the gap between the convex portion and the side wall surface of the upper cover in the present application, one side surface of the sealing member is in contact with the outer side surface of the convex portion and the bottom surface of the upper cover in the gap. When the upper cover covers the box body, the other side surface of the sealing member is in contact with the inner side surface and the top surface of the box body to form a tightly sealed housing structure, which can prevent substances such as rainwater from entering the housing and improve the waterproof performance of the housing.

[0018] The second object of the present utility model is to provide a battery pack, including the housing described above and a battery cell assembly accommodated in the housing. Since the battery pack adopts the above housing, the battery pack can also avoid substances such as rainwater from entering the interior, avoid the phenomenon of short circuit or burning after the battery pack is flooded with water, and improve the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is the overall structural schematic diagram of the housing in the present utility model;

[0021] Figure 2 is the cross-sectional view of the housing in the present utility model;

[0022] Figure 3 is Figure 2 the enlarged view of part A in

[0023] Figure 4 is the structural schematic diagram of the upper cover in the present utility model;

[0024] Figure 5 is the structural schematic diagram of the seal in the present utility model;

[0025] Figure 6 is the structural schematic diagram of the box body in the present utility model;

[0026] Figure 7 is the overall structural schematic diagram of the battery pack in the present utility model;

[0027] Figure 8 is the cross-sectional view of the battery pack in the present utility model.

[0028] The label details involved in the above-mentioned drawings are as follows:

[0029] 1 - battery pack, 2 - battery cell assembly, 3 - housing;

[0030] 4 - upper cover, 41 - convex part, 411 - recessed position, 42 - gap, 43 - first fixing hole, 44 - fixing member;

[0031] 5 - seal, 51 - horizontal section, 52 - vertical section, 53 - third fixing hole, 54 - first sealing area, 55 - second sealing area, 56 - channel, 57 - curved surface section;

[0032] 6 - box body, 61 - cavity, 62 - second fixing hole, 63 - protruding strip, 64 - stripe. Detailed implementation manners

[0033] In the description of the present application, the term "at least two" means more than two (including two). Similarly, "a plurality of" means more than two (including two). Technical terms such as "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. Terms such as "fitting", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0034] In the description of the present application, the orientation or positional relationship indicated by technical terms such as "lateral", "length", "width", "height", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0035] In order to more clearly understand the above objects, technical solutions and advantages of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application, and a detailed understanding of how to solve the problems raised in the above background technology.

[0036] In the first aspect, as Figures 1 to 6 shown, a waterproof housing 3 includes a box body 6 having a cavity 61 and an upper cover 4 covering the top of the box body 6. The upper cover 4 extends downward along the edge to form a convex portion 41. There is a gap 42 between the outer side wall of the convex portion 41 and the side wall of the upper cover 4. A seal 5 is disposed in the gap 42. One side surface of the seal 5 is in contact with the convex portion 41 and the upper cover 4, and the other side surface of the seal 5 is in contact with the box body 6.

[0037] Specifically, including but not limited to, the upper cover 4 is a rectangular plate, the convex part 41 is arranged on the bottom surface of the upper cover 4, and the convex parts 41 enclose an annular frame, so that there is a gap 42 between the outer side wall of the convex part 41 and any side wall of the upper cover 4. Then, a seal 5 is attached to the upper cover 4 on the gap 42. One side surface of the seal 5 is attached to the outer side surface of the convex part 41 and the bottom surface of the upper cover 4 within the gap 42. When the upper cover 4 is installed on the top of the box body 6, the other side surface of the seal 5 is attached to the inner side surface and the top surface of the box body 6, thereby forming an L-shaped sealing structure. It should be noted that the seal 5, the upper cover 4 and the top cover are of a split structure, so they can be produced independently. The convex part 41 and the upper cover 4 are integrally formed by stamping. At the same time, the structure of the seal 5 corresponds to the structure of the convex part 41. Then, during installation, the seal 5 can be quickly installed on the upper cover 4 so that the seal 5 fits with the upper cover 4. Of course, in order to improve the fixing effect and sealing effect between the seal 5 and the upper cover 4, in some embodiments, a waterproof and sticky glue is coated on one side surface of the seal 5 that fits with the upper cover 4 to achieve preliminary fixing and also enhance the adaptability of the housing 3 in harsh environments.

[0038] Through the above solution, the housing 3 has an L-shaped tightly sealed waterproof structure, which can prevent substances such as rainwater from entering the housing 3 and improve the waterproof performance of the housing 3.

[0039] As a specific embodiment of the improvement, as Figures 3 to 5 shown, the seal 5 includes a horizontal section 51 and a vertical section 52 fixedly connected to the horizontal section 51. The horizontal section 51 and the vertical section 52 are perpendicular to each other to form an "L" - shaped structure.

[0040] Specifically, including but not limited to, the seal 5 is set as a sealing ring to surround and fit the convex part. The horizontal section 51 is horizontally arranged along the width direction of the upper cover 4, and the vertical section 52 is vertically arranged along the height direction of the upper cover 4. The horizontal section 51 and the vertical section 52 are perpendicular to each other to form a structure with an L - shaped cross - section, and the horizontal section 51 and the vertical section 52 are integrally formed. At the same time, the set length of the horizontal section 51 is less than the length of the gap 42, and the set length of the vertical section 52 is greater than or equal to the set length of the convex part 41 extending downward to ensure the sealing area.

[0041] Through the above solution, the structural setting of the seal 5 can further enhance the sealing effect.

[0042] As a specific embodiment of the improvement, as Figures 3 to 5 shown, one side surface of the horizontal section 51 is attached to the bottom surface of the upper cover 4, and the other side surface of the horizontal section 51 is attached to the top surface of the box body 6 to form a first sealing area 54.

[0043] Specifically, including but not limited to, the top surface of the horizontal segment 51 is attached to the bottom surface of the upper cover 4 within the gap 42, and the bottom surface of the horizontal segment 51 is attached to the top surface of the side of the box body 6, thereby performing preliminary sealing and water blocking to form the first sealing area 54, and the first sealing area 54 is horizontally arranged, which can avoid a large amount of rainwater from entering from top to bottom.

[0044] Through the above solution, the setting of the first sealing area 54 can achieve the preliminary sealing and water blocking of the housing 3 and improve the waterproof effect of the housing 3.

[0045] As a specific embodiment of the improvement, as Figures 3 to 5 shown, one side surface of the vertical segment 52 is attached to the outer side surface of the convex part 41, and the other side surface of the vertical segment 52 is attached to the inner wall of the box body 6 to form the second sealing area 55.

[0046] Specifically, including but not limited to, the inner side surface of the vertical segment 52 is attached to the inner side surface of the box body 6, and the outer side surface of the vertical segment 52 is attached to the outer side surface of the convex package in the upper cover 4, thereby further sealing and water blocking to form the second sealing area 55. Since the horizontal segment 51 and the vertical segment 52 are integrally formed, the top surface of the vertical segment 52 is also attached to the bottom surface of the upper cover 4, so the second sealing area 55 is vertically arranged.

[0047] Through the above solution, the setting of the first sealing area 54 can achieve the further sealing and water blocking of the housing 3, thereby improving the waterproof effect of the housing 3 as a whole.

[0048] As a specific embodiment of the improvement, as Figure 3 、 Figure 4 and Figure 6 shown, the upper cover 4 is provided with a plurality of first fixing holes 43, and each first fixing hole 43 is provided with a fixing member 44. Correspondingly, the box body 6 is provided with a plurality of second fixing holes 62, and the fixing member 44 is inserted into the second fixing holes 62 for fixing.

[0049] Specifically, including but not limited to, both the first fixing holes 43 and the second fixing holes 62 are cylindrical through holes, the fixing members 44 are countersunk head screws, and the first fixing holes 43 and the second fixing holes 62 are both provided with thread structures for cooperating with the countersunk head screws for fixing, ensuring the airtightness of the housing 3 and preventing rainwater from entering from the upper cover 4. In this embodiment, both the first fixing holes 43 and the second fixing holes 62 are provided with 10, and correspondingly 10 fixing members 44 are installed, which are distributed at the four corners and four sides of the upper cover 4, and the first fixing holes 43 are arranged along the edge of the upper cover 4, and the second fixing holes 62 are arranged along the top surface of the same side. The first fixing holes 43 and the second fixing holes 62 are vertically corresponding, so that after the sealing member 5 is installed, the cover plate can be installed on the top of the box body 6 through the fixing members 44.

[0050] Through the above solution, the mutual cooperation of the first fixing hole 43, the fixing member 44, and the second fixing hole 62 can, on the one hand, fix the upper cover 4 to the top of the box body 6, and on the other hand, under the locking of the fixing member 44, the sealing member 5 can be extruded to ensure the sealing effect.

[0051] As a specific embodiment of the improvement, as Figures 3 to 6 shown, a plurality of third fixing holes 53 are provided on the vertical section 52 of the sealing member 5, and the first fixing hole 43, the third fixing hole 53, and the second fixing hole 62 are arranged in sequence up and down on the same straight line so that the fixing member 44 passes through the third fixing hole 53.

[0052] Specifically, including but not limited to, the third fixing holes 53 correspond to the first fixing hole 43 and the second fixing hole 62 and there are also 10 of them, and they are arranged on the same straight line in the vertical direction. In this embodiment, the third fixing holes 53 can be formed holes or semi-formed holes, but the diameter of the third fixing holes 53 should be larger than the diameter of the first fixing hole 43 or the second fixing hole 62 to prevent the fixing member 44 from piercing the sealing member 5 when inserted and ensure the service life of the sealing member 5.

[0053] Through the above solution, the third fixing holes 53 are provided on the sealing member 5, and the upper cover 4, the sealing member 5, and the box body 6 are limited and fixed by the fixing member 44, which can prevent the offset or misalignment installation of the sealing member 5.

[0054] As a specific embodiment of the improvement, as Figures 3 to 6 shown, the convex part 41 is provided with a plurality of recessed positions 411, the sealing member 5 is provided with a plurality of curved sections 57, and the box body 6 is provided with a plurality of protruding strips 63. One side of the curved section 57 is attached to the recessed position 411, and the other side of the curved section 57 is attached to the protruding strip 63.

[0055] Specifically, including but not limited to, the recessed position 411 is provided corresponding to the first fixing hole 43 opened on the upper cover 4. The recessed position 411 can be in the structure of an arc, a rectangle, a trapezoid, etc. Those skilled in the art can choose the setting according to actual application requirements; the curved section 57 is provided corresponding to the third fixing hole 53 opened on the horizontal section 51 of the sealing member 5, that is, an arc structure is formed after the horizontal section 51 and the vertical section 52 of the sealing member 5 are connected at this place; the protruding strip 63 is provided on the inner side surface of the box body 6 corresponding to the second fixing hole 62. The protruding strip 63 is arranged along the inner wall surface of the box body 6 and extends from the top surface to the bottom surface of the box body 6, effectively enhancing the strength of the box body 6. And both sides of the curved section 57 are respectively attached to the recessed position 411 and the protruding strip 63, so that the upper cover 4, the sealing member 5, and the box body 6 are sequentially fitted and installed. At the same time, the recessed position 411 and the curved section 57 form an avoidance area for the installation of the fixing member 44, and the second fixing hole 62 is opened at the center of the protruding strip 63, so that the fixing member 44 can be directly inserted into the second fixing hole 62 for fixation.

[0056] Through the above solution, the settings and cooperation of the recessed position 411, the curved surface section 57, and the protruding strip 63 can effectively form an avoidance space, facilitating the installation of the fixing member 44 and ensuring the sealing effect of the housing 3.

[0057] As a specific implementation of the improvement, as Figure 3 shown, the upper cover 4, the seal 5, and the box body 6 are sequentially attached to form a channel 56 for draining accumulated water at the corresponding seal 5.

[0058] Specifically, including but not limited to, in this embodiment, since the lateral section 51 of the seal 5 is smaller than the length of the gap 42 of the upper cover 4, after the upper cover 4 and the box body 6 are fixedly installed with each other, a notch-shaped channel 56 is formed at the corresponding lateral section 51. Since the seal 5 itself has a certain elasticity and is usually made of elastic materials such as rubber, silicone rubber, fluororubber, etc., the formation of this channel 56 can ensure that the sealing ring is closely attached under the extrusion of the upper cover 4 and the box body 6, and at the same time, it can also drain the accumulated water. When the housing 3 is placed sideways, it is inevitable that there will be a certain amount of accumulated water on the surface, and at this time, it can flow out through the channel 56.

[0059] Through the above solution, the formation of the channel 56 can ensure the close attachment of the upper cover 4, the seal 5, and the box body 6, improve the sealing effect, and remove the accumulated water on the surface of the housing 3.

[0060] As a specific implementation of the improvement, as Figure 6 shown, multiple stripes 64 are provided on at least one side surface of the box body 6, and the channel 56 is communicated with the stripes 64.

[0061] Specifically, including but not limited to, the formation of the channel 56 is along the length of the box body 6, and multiple stripes 64 are provided on the outer surface of the box body 6. The stripes 64 are provided as groove structures in the shapes of arcs, rectangles, and trapezoids. This embodiment is preferably a rectangular structure, and the stripes 64 penetrate through the entire side surface of the box body 6, so that the channel 56 is communicated with the stripes 64.

[0062] Through the above solution, the setting of the stripes 64 can, on the one hand, increase the heat dissipation area of the box body 6 to improve the heat dissipation effect of the housing 3, and on the other hand, can cooperate with the channel 56 to drain the accumulated water on the surface of the housing 3 as much as possible.

[0063] Secondly, as Figure 7 and Figure 8As shown in the figure, the present utility model provides a battery pack 1, which includes the housing 3 described above and a battery cell assembly 2 accommodated in the housing 3. The battery cell assembly 2 includes a battery cell module, a silica gel pad disposed between the bottom of the battery cell module and the bottom surface of the box body 6, an EVA film disposed in contact with the inner side wall of the box body 6 on the side of the battery module, etc. The EVA film can fill the gap generated by the protruding strip 63 to prevent the shaking or displacement of the battery module. In addition, a handle is installed on the bottom surface of the upper cover 4, which is convenient for the extraction and transportation of the entire battery pack 1 and improves the convenience of the battery pack 1.

[0064] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any technical solutions falling within the idea of the present utility model belong to the protection scope of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A waterproof housing, comprising a box body having a cavity and an upper cover covering the top of the box body, characterized in that, The upper cover extends downward along the edge to form a convex part. There is a gap between the outer side wall of the convex part and the side wall of the upper cover. A seal is arranged in the gap. One side surface of the seal is attached to the convex part and the upper cover, and the other side surface of the seal is attached to the box body.

2. The waterproof housing according to claim 1, characterized in that, The seal includes a horizontal section and a vertical section fixedly connected to the horizontal section. The horizontal section and the vertical section are perpendicular to each other to form an "L" - shaped structure.

3. A waterproof housing according to claim 2, characterized in that, One side surface of the horizontal section is attached to the bottom surface of the upper cover, and the other side surface of the horizontal section is attached to the top surface of the box body to form a first sealing area.

4. A waterproof housing according to claim 3, characterized in that, One side surface of the vertical section is attached to the outer side surface of the convex part, and the other side surface of the vertical section is attached to the inner wall of the box body to form a second sealing area.

5. A waterproof housing according to claim 4, characterized in that, The upper cover is provided with a plurality of first fixing holes, and each first fixing hole is installed with a fixing member. Correspondingly, the box body is provided with a plurality of second fixing holes, and the fixing member is inserted into the second fixing holes for fixation.

6. The waterproof housing according to claim 5, characterized in that, A plurality of third fixing holes are formed in the vertical section of the seal. The first fixing holes, the third fixing holes, and the second fixing holes are arranged in sequence up and down on the same straight line so that the fixing member passes through the third fixing holes.

7. The waterproof housing according to claim 6, characterized in that, The convex part is provided with a plurality of recessed positions, the seal is provided with a plurality of curved surface segments, and the box body is provided with a plurality of protruding strips. One side surface of the curved surface segment is attached to the recessed position, and the other side surface of the curved surface segment is attached to the protruding strip.

8. A waterproof housing according to claim 7, characterized in that, The upper cover, the seal, and the box body are attached in sequence to form a channel for draining accumulated water at the position corresponding to the seal.

9. A waterproof housing according to claim 8, wherein, At least one side surface of the box body is provided with a plurality of stripes, and the channel is communicated with the stripes.

10. A battery pack, characterized in that, It includes the housing according to any one of claims 1 - 9 and a battery cell assembly accommodated in the housing.

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