Waterproof structure of battery box

Abstract

The battery box waterproof structure comprises an upper shell and a lower shell which are buckled with each other, the whole upper shell is a rectangular shell with an opening in the bottom, the edge of the opening in the bottom of the upper shell is overturned outwards to be provided with an upper connecting edge, and the whole lower shell is a rectangular shell with an opening in the top. The edge of the top opening of the lower shell is overturned outwards to be provided with a lower connecting edge, and the upper connecting edge and the lower connecting edge are correspondingly arranged; the upper connecting edge and the lower connecting edge are fixedly connected through a fixing bolt; a gasket is arranged between the upper connecting edge and the lower connecting edge; the upper shell and the lower shell are fixed through the bolts and are provided with the gaskets, so that water drops are prevented from entering; the annular groove is matched with the convex edge, so that the strength and the sealing effect are improved; the buckling edge of the upper connecting edge can prevent water drops from entering from the gap; for the change of internal and external pressure of the battery box, water can be effectively blocked even if negative pressure exists in the box when the battery box stops working.

Description

Technical Field

[0001] This utility model relates to the field of battery boxes, specifically a waterproof battery box structure. Background Technology

[0002] With increasing environmental awareness, electric ships, as a zero-emission, low-noise, and low-energy-consumption mode of transportation, have received growing attention. Batteries, as the energy source for electric ships, and battery boxes, are crucial components of the ship's electrical system, providing power storage and supply for the ship's equipment.

[0003] For example, patent CN222867775U discloses a liquid-cooled battery box, including: a lower box body; a liquid cooling plate, the liquid cooling plate being installed on the lower box body; a battery module, located inside the lower box body and above the liquid cooling plate; the liquid cooling plate is provided with a plurality of positioning holes, and the lower box body is provided with a plurality of mounting posts, the positioning holes being able to be inserted into the mounting posts.

[0004] The aforementioned patent effectively controls the battery temperature and temperature difference through a built-in liquid cooling system, enabling the battery to operate stably and reliably in a suitable environment. The overall cooling effect of the battery box is good, and the temperature rise within the battery module is low, thereby extending the cycle life of the battery cells. This allows the battery box to accommodate higher capacity battery cells, thus providing the ship with longer-lasting power. However, the disadvantage of the aforementioned patent is that the sealing of the aforementioned patent is generally achieved by covering the top of the lower box with a sealing gasket or sealant. This sealing method is suitable for small battery boxes, but its sealing effect is not good for large battery boxes.

[0005] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this invention is to provide a waterproof battery box structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] The battery box has a waterproof structure, including an upper shell and a lower shell that interlock. The upper shell is a rectangular shell with an opening at the bottom, and the edge of the bottom opening of the upper shell is turned outward to form an upper connecting edge. The lower shell is a rectangular shell with an opening at the top, and the edge of the top opening of the lower shell is turned outward to form a lower connecting edge. The upper and lower connecting edges are correspondingly arranged. The upper and lower connecting edges are fixedly connected by fixing bolts. A washer is also provided between the upper and lower connecting edges. The edge of the upper connecting edge is bent downward to form a fastening edge. The fastening edge covers the sides of the upper connecting edge, the lower connecting edge, and the washer.

[0009] Furthermore, a triangular lower stiffening plate is fixedly welded between the lower connecting edge and the side wall of the lower housing.

[0010] Furthermore, the upper surface of the lower connecting edge is stamped with an annular groove, and the lower surface of the upper connecting edge is processed with an annular convex ridge; wherein the cross-section of both the annular groove and the annular convex ridge is U-shaped.

[0011] Furthermore, a drying structure is also provided below the top of the upper housing.

[0012] Furthermore, the drying structure includes a desiccant placement box and a lid; the top of the desiccant placement box has an opening, and the bottom of the lid has an opening, with the lid fastened inside the desiccant placement box. At the same time, both the lid and the side walls of the desiccant placement box have several moisture inlets.

[0013] Furthermore, the desiccant placement box has ear plates extending outward on both sides, with through holes on the ear plates, and the ear plates are fixedly installed on the top of the upper housing by bolts.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The upper and lower connecting edges are fixed with bolts and have washers to prevent water droplets from entering; the annular groove and the convex ridge cooperate to increase strength and improve the sealing effect; the upper connecting edge can prevent water droplets from entering from the gap.

[0016] Despite pressure changes inside and outside the battery box, even when the box is under negative pressure during shutdown, it effectively prevents water from entering. Additionally, a drying structure is located at the bottom of the top of the upper casing, allowing moisture to enter and be absorbed by the desiccant, ensuring a dry environment inside the box, extending the lifespan of the battery box and related equipment, and improving safety and reliability. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the waterproof structure of the battery box.

[0018] Figure 2 This is an exploded view of the waterproof structure of the battery box.

[0019] Figure 3 This is a side view of the waterproof structure of the battery box.

[0020] Figure 4 for Figure 3 Sectional view along the AA direction.

[0021] Figure 5 for Figure 4 A magnified view of a portion of point a.

[0022] Figure 6 In some embodiments Figure 4A magnified view of a portion of point a.

[0023] Figure 7 This is a schematic diagram of the upper shell in the waterproof structure of the battery box.

[0024] Figure 8 This is a schematic diagram of the drying structure in the waterproof structure of the battery box. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] Please see Figure 1-8 The battery box has a waterproof structure, including an upper shell 100 and a lower shell 200 that are interlocked. The upper shell 100 is a rectangular shell with an opening at the bottom, and the edge of the bottom opening of the upper shell 100 is turned outward to form an upper connecting edge 101. The lower shell 200 is a rectangular shell with an opening at the top, and the edge of the top opening of the lower shell 200 is turned outward to form a lower connecting edge 201. The upper connecting edge 101 and the lower connecting edge 201 are correspondingly arranged. The upper connecting edge 101 and the lower connecting edge 201 are fixedly connected by fixing bolts 300.

[0027] Meanwhile, a gasket 301 is also provided between the upper connecting edge 101 and the lower connecting edge 201. The gasket 301 is used to seal between the upper connecting edge 101 and the lower connecting edge 201 to prevent water droplets from entering between the upper connecting edge 101 and the lower connecting edge 201.

[0028] Meanwhile, since the upper connecting edge 101 and the lower connecting edge 201 are generally processed by bending, and since the upper connecting edge 101 and the lower connecting edge 201 are relatively thin, and since the lower connecting edge 201 is a load-bearing component (bearing the weight of the upper shell) and is prone to deformation, in this solution, a triangular lower stiffening plate 202 is also fixedly welded between the lower connecting edge 201 and the side wall of the lower shell 200 to enhance the structural strength of the lower connecting edge 201 and prevent its deformation;

[0029] In some embodiments of this solution, the battery box for electric ships is generally large, which results in the upper connecting edge 101 and the lower connecting edge 201 also being large. Maintaining the flatness of the surfaces of the upper connecting edge 101 and the lower connecting edge 201 is difficult to process. Furthermore, if the flatness of the surfaces of the upper connecting edge 101 and the lower connecting edge 201 is poor (e.g., the upper connecting edge 101 and the lower connecting edge 201 are bent), even with the addition of a gasket 301, it is difficult to guarantee a seal between the upper connecting edges 101 and the lower connecting edges 201. Therefore, in this solution, if... Figure 6 As shown, an annular groove 203 is stamped on the upper surface of the lower connecting edge 201, and an annular ridge 103 is processed on the lower surface of the upper connecting edge 101; the cross-sections of the annular groove 203 and the annular ridge 103 are both U-shaped; the annular groove 203 and the annular ridge 103 not only increase the structural strength of the upper connecting edge 101 and the lower connecting edge 201, but also, when the upper housing 100 and the lower housing 200 are assembled, the lower end of the annular ridge 103 is located directly above the annular groove 203. At this time, the annular ridge 103 forces the gasket 301 to deform further at this location, causing the gasket 301 to fill into the annular groove 203, thereby increasing the contact area between the gasket 301 and the sealed surface, and thus improving the sealing effect;

[0030] In this design, the battery cells inevitably generate heat during battery use, which heats the air inside the battery box, increasing the pressure. Normally, a pressure relief valve is installed on the battery box to release this air. However, when the battery box stops working, the air temperature inside drops, and since the pressure relief valve has already released the air, a negative pressure will form inside the battery box.

[0031] If water droplets are attached to the sides of the upper connecting edge 101, the lower connecting edge 201 and the gasket 301, these water droplets can easily enter the battery box through the gap between the upper connecting edge 101, the lower connecting edge 201 and the gasket 301.

[0032] Therefore, in this solution, the edge of the upper connecting edge 101 is bent downward to form a fastening edge 104; the fastening edge 104 covers the side of the upper connecting edge 101, the lower connecting edge 201 and the washer 301 to prevent water droplets from adhering to the gap between the upper connecting edge 101, the lower connecting edge 201 and the washer 301, thereby preventing water droplets from entering.

[0033] Meanwhile, as it is used, some moisture will inevitably enter the battery box. Therefore, in this solution, a drying structure 400 is provided below the top of the upper housing 100. The drying structure 400 includes a desiccant placement box 401 and a cover 403. The top of the desiccant placement box 401 is open, and ear plates 402 are provided on both sides of the desiccant placement box 401 extending outward. The ear plates 402 are provided with through holes and are fixedly installed on the top of the upper housing 100 by bolts. The bottom of the cover 403 is open and is fastened inside the desiccant placement box 401. At the same time, the side walls of the cover 403 and the desiccant placement box 401 are provided with several moisture inlet holes 404.

[0034] When this solution is put into use, the desiccant is placed in the desiccant placement box 401. The moisture in the battery box enters the drying structure 400 through the moisture inlet 404 and is finally absorbed by the desiccant, ensuring the dryness of the environment inside the battery box.

[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A waterproof battery box structure, comprising an upper shell and a lower shell that interlock, characterized in that, The upper housing is a rectangular shell with an opening at the bottom, and the edge of the bottom opening of the upper housing is turned outward to form an upper connecting edge. The lower housing is a rectangular shell with an opening at the top, and the edge of the top opening of the lower housing is turned outward to form a lower connecting edge. The upper and lower connecting edges are correspondingly arranged. The upper and lower connecting edges are fixedly connected by fixing bolts. A washer is also provided between the upper and lower connecting edges. The edge of the upper connecting edge is bent downward to form a fastening edge. The fastening edge covers the sides of the upper connecting edge, the lower connecting edge, and the washer.

2. The waterproof battery box structure according to claim 1, characterized in that, A triangular lower stiffening plate is also fixedly welded between the lower connecting edge and the side wall of the lower shell.

3. The waterproof battery box structure according to claim 1, characterized in that, The upper surface of the lower connecting edge is stamped with an annular groove, and the lower surface of the upper connecting edge is processed with an annular convex ridge; the cross-sections of the annular groove and the annular convex ridge are both U-shaped.

4. The waterproof battery box structure according to claim 1, characterized in that, A drying structure is also provided below the top of the upper shell.

5. The waterproof battery box structure according to claim 4, characterized in that, The drying structure includes a desiccant placement box and a lid; the top of the desiccant placement box is open and the bottom of the lid is open. The lid is fastened inside the desiccant placement box, and both the lid and the side walls of the desiccant placement box have several water vapor inlets.

6. The waterproof battery box structure according to claim 5, characterized in that, The desiccant placement box has ear plates extending outward on both sides. The ear plates have through holes and are fixedly installed on the top of the upper shell by bolts.

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