A battery pack with an integrated upper cover

Abstract

The application discloses a battery pack with an integrated cover, comprising a bottom box, a cover body and a sealing strip. The cover body comprises a top plate and a circumferential side plate arranged around the edge of the top plate, the circumferential side plate is a closed ring, the circumferential side plate forms a cavity and a bottom opening communicating with the cavity, the cover body is connected to the bottom box, the bottom box covers the bottom opening, and the cover body is an integrally formed part. The sealing strip is located between the bottom box and the cover body and is used for sealing the gap between the bottom box and the cover body. The cover body of the application is an integrally formed part, the traditional high baffle with a large weight is cancelled, the overall weight of the battery pack is reduced to realize light weight, and a large number of bolts are not needed in the assembly process. Not only the bolt purchasing and installation cost is reduced, but also the hidden dangers such as bolt loss and uneven tightening force are avoided, the assembly efficiency and connection reliability are improved, meanwhile, the sealing connection path of the cover body and the bottom box is shortened, the sealing strip laying length is correspondingly reduced, the potential sealing leakage point is reduced, the air tightness of the battery box body is greatly improved, and the use safety is enhanced.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, and more particularly to a battery pack with an integrated top cover. Background Technology

[0002] Existing battery packs typically consist of a base box and a top cover. The base box contains a cooling water circulation channel for cooling the battery modules, and an inlet and outlet are connected to one end of the base box along its length. The top cover includes a top wall and side walls on both sides of the top wall, which are connected to form a U-shaped top cover. Openings extending along the length of the base box are formed between the two side walls and the top wall. In the prior art, high baffles are fixed to both ends of the base box along its length, and these high baffles are connected to the base box and cover the openings on both sides of the base box.

[0003] However, the high baffle itself is quite heavy, increasing the overall weight of the battery pack, which in turn leads to increased vehicle load and energy consumption. Furthermore, the high baffle needs to be connected to the end of the base box, which has inlet and outlet water nozzles. During assembly, the proximity of the inlet and outlet water nozzles to the high baffle's connection to the base box restricts installation operations (such as welding), making operation inconvenient. Additionally, the high baffle is bolted to the U-shaped cover; due to the long edge of the U-shaped cover, a large number of bolt assemblies are required for assembly, which not only consumes manpower and time but also imposes stringent requirements on assembly precision, necessitating precise alignment of each bolt hole. Uneven tightening of individual bolts can easily occur, affecting the overall sealing and connection reliability of the battery pack. Furthermore, the perpendicularity between the high baffle and the base box is difficult to control precisely during assembly, negatively impacting subsequent installation procedures. Additionally, a large number of bolts are prone to loss or specification confusion during assembly and maintenance, causing inconvenience. Secondly, the long connection path between the high baffle and the base box increases the length of the sealing strip, raising installation difficulty and creating potential airtightness leaks along the sealing path, thus affecting the battery pack's safety.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] To solve one of the above-mentioned technical problems, this utility model provides a battery pack with an integrated top cover.

[0006] The present invention adopts the following technical solution:

[0007] A battery pack with an integrated top cover, comprising:

[0008] Base box;

[0009] The cover includes a top plate and peripheral side plates disposed around the edge of the top plate. The peripheral side plates are closed rings and enclose a cavity and a bottom opening communicating with the cavity. The cover is connected to a bottom box, and the bottom box covers the bottom opening. The cover is an integrally formed part.

[0010] A sealing strip is located between the bottom box and the cover to seal the gap between the bottom box and the cover.

[0011] Optionally, the bottom box includes a bottom plate and end beams;

[0012] The end beam is disposed on one side of the base plate along the thickness direction;

[0013] The end beams are located on opposite sides of the base plate;

[0014] The end beam is welded to the base plate;

[0015] The peripheral side plate of the cover is partially connected to the end beam, and the sealing strip is partially located on the end beam to seal the gap between the end beam and the peripheral side plate of the cover.

[0016] Optionally, along the thickness direction of the base plate, the ratio of the extension dimension of the end beam to the thickness of the base plate is (0.3 to 3):1.

[0017] Optionally, the end beam is welded to the base plate on the side closest to the edge of the base plate.

[0018] Optionally, the base plate has a water-cooling channel;

[0019] A water nozzle is provided on one side of the base plate along the thickness direction, and the water nozzle is connected to the water cooling channel;

[0020] The water nozzle is located on the outside of the end beam, and there is a gap between the water nozzle and the end beam;

[0021] Along the thickness direction of the base plate, the extension dimension of the end beam is not greater than the extension dimension of the water nozzle.

[0022] Optionally, an avoidance notch is provided on the side of the end beam near the water nozzle;

[0023] The water nozzle is fully welded to the base plate.

[0024] Optionally, the side of the end beam away from the bottom plate has a sealing mating surface;

[0025] The peripheral side plate is provided with a flanged edge;

[0026] The sealing strip is provided between the sealing mating surface of the flange and the end beam.

[0027] Optionally, a plurality of connecting holes are provided on the sealing mating surface, and each connecting hole is arranged at intervals along the length direction of the end beam;

[0028] One end of the fastener passes through the flange and the sealing strip and is connected to the connecting hole, while the other end of the fastener is confined to the flange.

[0029] Optionally, the end beam includes a rivet nut, a connector, and two strips;

[0030] Two strips are spaced apart and arranged in parallel, and the connector is located between the two strips and connects the two strips;

[0031] A gap cavity is formed between the two strips;

[0032] One of the strips is welded to the base plate, and a rivet nut is connected to the other strip. The rivet nut has the connecting hole and is located in the gap cavity between the two strips.

[0033] Optionally, any of the aforementioned integrated battery packs with a top cover includes a module beam;

[0034] The modular beam is located on the side of the end beam away from the edge of the base plate, and the modular beam is connected to both the base plate and the end beam.

[0035] The battery modules of the battery pack are fixed to the module beam.

[0036] By adopting the above technical solution, this application has the following beneficial effects:

[0037] The integrated battery pack cover of this application is a one-piece molded part, eliminating the traditional heavy baffle, reducing the overall weight of the battery pack to achieve lightweighting, and eliminating the need for a large number of bolts during assembly. This not only reduces bolt procurement and installation costs, but also avoids the hidden dangers of bolt loss and uneven tightening force, improving assembly efficiency and connection reliability. At the same time, it shortens the sealing connection path between the cover and the bottom box, correspondingly reducing the length of the sealing strip, reducing potential sealing leaks, significantly improving the airtightness of the battery box, and enhancing the safety of use.

[0038] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0039] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0040] Figure 1 This is a schematic diagram of the structure of the battery pack with an integrated top cover provided in an embodiment of this application;

[0041] Figure 2 Another perspective view of the battery pack with an integrated top cover provided in an embodiment of this application;

[0042] Figure 3 A partial structural diagram of the battery pack with an integrated top cover provided in an embodiment of this application;

[0043] Figure 4 A schematic diagram of the bottom tank connection water nozzle of the battery pack with integrated top cover provided in an embodiment of this application;

[0044] Figure 5 A cross-sectional view of a partial structure of the battery pack with an integrated top cover provided in an embodiment of this application;

[0045] Figure 6 A schematic diagram of the bottom box and module beam structure of the integrated battery pack with an integrated top cover provided in this application embodiment.

[0046] In the diagram: bottom box 1, bottom plate 11, end beam 12, rivet nut 121, connecting hole 1211, connecting body 122, strip 123, clearance notch 1231, cover 2, top plate 21, side plate 22, flange 221, sealing strip 3, module beam 4, water nozzle 5.

[0047] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0049] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] like Figures 1 to 6 As shown, this application provides an integrated battery pack with a top cover, including a bottom box 1, a cover 2, and a sealing strip 3. The cover 2 includes a top plate 21 and peripheral side plates 22 disposed around the edge of the top plate 21. The peripheral side plates 22 are closed rings, forming a cavity and a bottom opening communicating with the cavity. The cover 2 is connected to the bottom box 1, and the bottom box 1 covers the bottom opening. The cover 2 is an integrally formed part. The sealing strip 3 is located between the bottom box 1 and the cover 2, i.e., compressed and disposed between the two, for sealing the gap between the bottom box 1 and the cover 2. The cover 2 of this application is an integrally formed part, eliminating the traditional heavy high baffle, reducing the overall weight of the battery pack to achieve lightweighting, and eliminating the need for bolt fixing during assembly. This not only reduces bolt procurement and installation costs, but also avoids the hidden dangers of bolt loss and uneven tightening force, improving assembly efficiency and connection reliability. Meanwhile, the structural design of this application also shortens the sealing connection path between the cover 2 and the bottom box 1, correspondingly reducing the length of the sealing strip, reducing potential sealing leaks, significantly improving the airtightness of the battery box, and enhancing the safety of use.

[0052] In one possible implementation, such as Figure 3 , Figure 4 and Figure 6 As shown, the bottom box 1 includes a bottom plate 11 and end beams 12. The end beams 12 are disposed on one side of the bottom plate 11 along its thickness direction, and on opposite sides of the bottom plate 11. The end beams 12 can be welded to the bottom plate 11. The peripheral side plate 22 of the cover 2 is partially connected to the end beams 12. The sealing strip 3 is partially located on the end beams 12 to seal the gap between the end beams 12 and the peripheral side plate 22 of the cover 2. The sealing strip 3 can effectively seal the gap between the end beams 12 and the peripheral side plate 22 of the cover 2, reliably preventing moisture, dust, and other impurities from entering the battery pack and ensuring safe battery operation. The sealing strip 3 can be a closed ring extending around the edge of the cover 2.

[0053] Along the thickness direction of the base plate 11, the ratio of the extension dimension of the end beam 12 to the thickness of the base plate 11 is (0.3~3):1. The small dimensional difference between the end beam 12 and the base plate 11 facilitates welding the end beam 12 to the base plate. For example, the end beam can be easily welded to the base plate 11 from the outside, without needing to weld the end beam 12 to the inside of the base plate 11.

[0054] like Figure 3 , Figure 4 and Figure 6 As shown, the end beam 12 is welded to the base plate 11 on the side closest to its edge (i.e., the outer side). The base plate 11 and the end beam 12 have small thicknesses; that is, their heights are very small along the height of the battery pack, and the height difference between them is small. This allows for convenient welding of the end beam directly from the outside, unlike in the prior art where the end beam 12 is too tall, creating a large gap between it and the water nozzle 5, hindering welding operations and requiring welding to be performed on the side of the end beam 12 closest to the center of the base plate (the inner side). The structural design of this application simplifies the assembly of the end beam 12 and improves welding quality.

[0055] In one possible implementation, such as Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the base plate 11 has a water-cooling channel. A water nozzle 5 is provided on one side of the base plate 11 along its thickness direction, and the water nozzle 5 connects to the water-cooling channel. The water nozzle 5 is located outside the end beam 12, and there is a gap between the water nozzle 5 and the end beam 12. Along the thickness direction of the base plate 11, the extension dimension of the end beam 12 is not greater than the extension dimension of the water nozzle 5. Along the thickness direction of the base plate 11, that is, along the height of the battery pack, the water nozzle 5 is relatively higher than the end beam 12. A low operating space is formed between the water nozzle 5 and the end beam 12, which reduces the welding difficulty and facilitates the welding equipment to extend into the operating space to perform welding operations between the end beam 12 and the base plate 11.

[0056] like Figure 4As shown, an avoidance notch 1231 is provided on the side of the end beam 12 near the water nozzle 5, and the water nozzle 5 is fully welded to the base plate 11 around its perimeter. The avoidance notch 1231 avoids the installation position of the water nozzle 5, providing ample and unobstructed operating space for the full welding of the water nozzle 5 around its perimeter, and also increases the gap between the water nozzle and the end beam 12, facilitating the welding of the end beam 12 to the base plate 11. The avoidance notch 1231 avoids the problem of mutual welding interference between the end beam 12 and the water nozzle 5. The water nozzle 5 is fully welded to the base plate 11 around its perimeter, which greatly improves the sealing performance and structural strength of the connection between the water nozzle 5 and the water cooling channel, effectively preventing coolant leakage and ensuring the stable operation of the water cooling system.

[0057] like Figure 5 As shown, the end beam 12 has a sealing mating surface on the side opposite to the base plate 11, and the peripheral side plate 22 has a flange 221 along its edge. A sealing strip 3 (partial sealing strip) is provided between the flange 221 and the sealing mating surface of the end beam 12. The flange 221 increases the structural strength of the peripheral side plate 22 and facilitates its close connection with the base box. A sealing strip 3 can be provided between the flange and the base box. The sealing strip 3 is compressed between the two to seal the gap between them, effectively preventing moisture, dust and other impurities from entering the battery pack, thus ensuring that the battery pack meets the sealing standards.

[0058] like Figure 4 As shown, multiple connecting holes 1211 are provided on the sealing mating surface. These connecting holes 1211 are spaced apart sequentially along the length of the end beam 12. One end of a fastener passes through the flange 221 and the sealing strip 3 and connects to the connecting hole 1211, while the other end of the fastener is confined to the flange 221. This ensures a uniform and stable connection between the cover's two peripheral side plates 22 and the end beam 12, preventing uneven local stress that could lead to sealing gaps. Simultaneously, the other end of the fastener, located on the flange 221, will not protrude and interfere with other components, and the spaced connecting holes 1211 ensure that the sealing strip 3 is uniformly compressed, further improving sealing reliability.

[0059] In one possible implementation, the end beam 12 includes a rivet nut 121, a connector 122, and two strips 123. The two strips 123 are spaced apart and arranged parallel to each other. The connector 122 is located between the two strips 123 and connects the two strips 123. A gap cavity is formed between the two strips 123. One strip 123 is welded to the base plate 11, and the rivet nut 121 is connected to the other strip 123. The rivet nut 121 has the connecting hole 1211 and is located in the gap cavity between the two strips 123. The side of the strip 123 with the rivet nut 121 facing away from the base plate 11 is a sealing mating surface. The clearance notch 1231 is provided on the side of the strip 123 near the water nozzle 5. A stable gap cavity is formed between the two parallel and spaced strips 123, and the overall structure has high strength. The rivet nut 121 is set on the strip 123 on the side away from the bottom plate 11. The gap cavity formed between the two strips 123 can accommodate the rivet nut 121, making full use of the space. The rivet nut is located in the gap cavity and does not protrude outward, so it will not interfere with other structures.

[0060] In one possible implementation, the integrated battery pack includes a module beam 4 located on the side of the end beam 12 away from the edge of the base plate 11. The module beam 4 is connected to both the base plate 11 and the end beam 12, and the battery modules of the battery pack are fixed to the module beam 4. The module beam 4 is used to connect and fix to the end plate of the battery module. The module beam 4 and the end beam 12 can be connected by welding or fastening to form an integrated structure with good structural stability.

[0061] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A battery pack with an integrated top cover, characterized in that, include: Base box; The cover includes a top plate and peripheral side plates disposed around the edge of the top plate. The peripheral side plates are closed rings and enclose a cavity and a bottom opening communicating with the cavity. The cover is connected to a bottom box, and the bottom box covers the bottom opening. The cover is an integrally formed part. A sealing strip is located between the bottom box and the cover to seal the gap between the bottom box and the cover.

2. The battery pack with an integrated top cover according to claim 1, characterized in that, The bottom box includes a bottom plate and end beams; The end beam is disposed on one side of the base plate along the thickness direction; The end beams are located on opposite sides of the base plate; The end beam is welded to the base plate; The peripheral side plate of the cover is partially connected to the end beam, and the sealing strip is partially located on the end beam to seal the gap between the end beam and the peripheral side plate of the cover.

3. The battery pack with an integrated top cover according to claim 2, characterized in that, Along the thickness direction of the base plate, the ratio of the extension dimension of the end beam to the thickness of the base plate is (0.3 to 3):

1.

4. The battery pack with an integrated top cover according to claim 2, characterized in that, The end beam is welded to the base plate on the side closest to the edge of the base plate.

5. The battery pack with an integrated top cover according to claim 2, characterized in that, The base plate has a water cooling channel; A water nozzle is provided on one side of the base plate along the thickness direction, and the water nozzle is connected to the water cooling channel; The water nozzle is located on the outside of the end beam, and there is a gap between the water nozzle and the end beam; Along the thickness direction of the base plate, the extension dimension of the end beam is not greater than the extension dimension of the water nozzle.

6. The battery pack with an integrated top cover according to claim 5, characterized in that, An avoidance notch is provided on the side of the end beam closest to the water nozzle; The faucet is fully welded to the base plate around its periphery.

7. The battery pack with an integrated top cover according to claim 2, characterized in that, The side of the end beam away from the bottom plate has a sealing mating surface; The peripheral side plate is provided with a flanged edge; The sealing strip is provided between the sealing mating surface of the flange and the end beam.

8. The battery pack with an integrated top cover according to claim 7, characterized in that, Multiple connection holes are provided on the sealing mating surface, and each connection hole is arranged at intervals along the length direction of the end beam. One end of the fastener passes through the flange and the sealing strip and is connected to the connecting hole, while the other end of the fastener is confined to the flange.

9. The battery pack with an integrated top cover according to claim 8, characterized in that, The end beam includes a rivet nut, a connector, and two strips; Two strips are spaced apart and arranged in parallel, and the connector is located between the two strips and connects the two strips; A gap cavity is formed between the two strips; One of the strips is welded to the base plate, and a rivet nut is connected to the other strip. The rivet nut has the connecting hole and is located in the gap cavity between the two strips.

10. The battery pack with an integrated top cover according to any one of claims 2-9, characterized in that, Including modular beams; The modular beam is located on the side of the end beam away from the edge of the base plate, and the modular beam is connected to both the base plate and the end beam. The battery modules of the battery pack are fixed to the module beam.

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