CN221176539U

CN221176539U - Upper cover subassembly, battery package and consumer of battery package

Info

Publication number: CN221176539U
Application number: CN202322670932.4U
Authority: CN
Inventors: 邓庆明; 旷刚; 钟耀田; 蒙永锦; 刘志元
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2024-06-18
Anticipated expiration: 2033-09-28

Abstract

The utility model provides an upper cover assembly of a battery pack, the battery pack and electric equipment. The upper cover assembly of the battery pack comprises a body part, a mounting part and a first connecting piece. At least one mounting part and the body part are integrally formed, one side of the mounting part along the thickness direction of the body part protrudes, a first accommodating cavity is formed at the other side of the mounting part along the thickness direction of the body part, and a connecting hole is formed at the top of the mounting part; the first connecting piece is opposite to the connecting hole and is fixedly arranged in the first accommodating cavity. The upper cover assembly can serve as a main force receiving portion connected to the outside. Through installation department and body integrated into one piece, improve upper cover assembly's structural strength, reduce manufacturing cost, improve sealing performance. Through connecting hole and first connecting piece cooperation to and first connecting piece and installation department fixed connection, simplify the assembly process of battery package, improve production efficiency.

Description

Upper cover subassembly, battery package and consumer of battery package

Technical Field

The utility model relates to the technical field of automobiles, in particular to an upper cover assembly of a battery pack, the battery pack and electric equipment.

Background

The power battery structure is usually connected with the vehicle body through a tray welding lifting lug. However, this increases the overall weight of the bag, reduces the battery energy density, and reduces the efficiency of assembly.

Disclosure of utility model

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the utility model is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To at least partially solve the above problems, a first aspect of the present utility model provides a cap assembly of a battery pack, comprising:

A body portion;

At least one mounting part, at least one mounting part and the body part are integrally formed, the mounting part protrudes along one side of the thickness direction of the body part, a first accommodating cavity is formed on the other side of the mounting part along the thickness direction of the body part, and a connecting hole is formed at the top of the mounting part; and; and

The first connecting piece is opposite to the connecting hole and fixedly arranged in the first accommodating cavity.

According to the upper cover assembly of the battery pack of the first aspect of the present utility model, the upper cover assembly can serve as a main force receiving portion connected to the outside. Through installation department and body integrated into one piece, improve upper cover assembly's structural strength, reduce manufacturing cost, improve sealing performance. Through connecting hole and first connecting piece cooperation to and first connecting piece and installation department fixed connection, simplify the assembly process of battery package, improve production efficiency.

Optionally, the first connector is configured as a cylinder with an opening towards the connection hole; and/or

The first connecting piece is welded with the inner wall surface of the mounting part.

Optionally, the side wall of the mounting part is provided in a stepped structure.

Optionally, a second accommodating cavity is formed on one side, close to the first accommodating cavity, of the body part, and the second accommodating cavity is communicated with the first accommodating cavity.

Optionally, a glue layer is arranged in the second accommodating cavity; and/or

And a glue layer is arranged in the first accommodating cavity.

Optionally, the adhesive layer is a foaming adhesive layer and/or a structural adhesive layer.

Optionally, the device further comprises a second connecting piece for connecting to an external structure, the second connecting piece passing through the connecting hole and being fixedly connected with the first connecting piece so as to fixedly connect the body part to the external structure.

Optionally, an inner wall of the first connecting piece is provided with an internal thread;

the connecting end of the second connecting piece and the first connecting piece is provided with external threads meshed with the internal threads.

Optionally, a plurality of the mounting portions are disposed at intervals along a length direction and/or a width direction of the body.

Optionally, the battery pack further comprises a connecting part, wherein the connecting part is arranged on the periphery of the body part and is used for being connected with the lower shell of the battery pack.

The second aspect of the present utility model provides a battery pack, which includes the upper cover assembly, the lower housing, and the battery cell, wherein the upper cover assembly covers the lower housing to form a containing cavity, and the battery cell is contained in the containing cavity.

According to the battery pack disclosed by the utility model, the battery pack is convenient to install, high in structural strength, good in sealing performance and low in manufacturing cost, and meanwhile, the energy density and the electricity storage capacity of the battery pack can be improved under the same external size.

A third aspect of the present utility model provides an electric device, including the device theme and the battery pack described above, where the battery pack is installed in the device main body and is used to supply power to the device main body.

The electric equipment provided by the third aspect of the utility model has the advantages of improving energy density and electricity storage capacity, improving safety performance, facilitating installation and maintenance, reducing cost, reducing weight and the like.

Drawings

The following drawings of embodiments of the present utility model are included as part of the utility model. Embodiments of the present utility model and their description are shown in the drawings to explain the principles of the utility model. In the drawings of which there are shown,

Fig. 1 is a perspective view illustrating a cap assembly of a battery pack according to a preferred embodiment of the present utility model;

Fig. 2 is a sectional view of a cap assembly of a battery pack according to a preferred embodiment of the present utility model; and

Fig. 3 is an enlarged schematic view of the portion a in fig. 2.

Description of the reference numerals

10: Body part

11: Second accommodation chamber

20: Mounting part

21: First accommodation chamber

22: Step structure

31: First connecting piece

32: Second connecting piece

40: Adhesive layer

50: Connecting part

60: Vehicle body cross beam

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. It will be apparent, however, to one skilled in the art that embodiments of the utility model may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the embodiments of the utility model.

Herein, ordinal words such as "first" and "second" cited in the present utility model are merely identifiers and do not have any other meaning, such as a particular order or the like. Also, for example, the term "first component" does not itself connote the presence of "second component" and the term "second component" does not itself connote the presence of "first component".

In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used merely to indicate relative positional relationships between the relevant portions, and do not limit the absolute positions of the relevant portions.

Herein, "equal," "same," etc. are not strictly mathematical and/or geometric limitations, but also include deviations that may be appreciated by those skilled in the art and allowed by fabrication or use, etc.

Unless otherwise indicated, numerical ranges herein include not only the entire range within both of its endpoints, but also the several sub-ranges contained therein.

Referring to fig. 1 to 3, the present utility model provides a cap assembly of a battery pack, which includes a body part 10, a mounting part 20, and a first connector 31. The mounting portion 20 protrudes along one side of the thickness direction of the body portion 10, the other side of the mounting portion 20 along the thickness direction of the body portion 10 forms a first accommodating cavity 21, a connecting hole is formed in the top of the mounting portion 20, and at least one mounting portion 20 is integrally formed with the body portion 10. Preferably, the mounting portion 20 is integrally stamped and formed with the body portion 10. The first connecting piece 31 is opposite to the connecting hole and fixedly arranged in the first accommodating cavity 21. In the utility model, the mounting part 20 is arranged on the body part 10 of the upper cover assembly, so that the original bearing structure of the battery pack, such as the arrangement of lifting lugs, can be omitted, or the bearing requirement on the original bearing structure is reduced, the whole weight of the battery pack can be effectively reduced, the energy density of the battery can be improved, and the cruising ability and performance of the electric automobile can be improved; the welding procedure during installation can be omitted; meanwhile, the space utilization rate inside the battery pack is improved. This helps to increase the energy density and the amount of electricity stored in the battery pack at the same external dimensions; in addition, omitting the tray structure can reduce raw materials and manufacturing costs. By integrally forming the mounting part 20 and the body part 10, better structural design can be realized, and the structural strength of the upper cover assembly is improved; the number of parts can be reduced, thereby reducing the weight of the battery pack, and simultaneously, the assembly steps of the parts and the manufacturing cost are reduced. In addition, the integral molding can ensure the sealing performance of the battery pack. The mounting portion 20 protrudes upward in the thickness direction of the body portion 10, and can effectively improve the strength of the body portion 10. By providing the connection hole with the first connection member 31, for example, the mounting portion 20 and the vehicle body cross member can be connected by using a bolt, thereby fixing the battery pack to the vehicle body cross member, the assembly process of the battery pack can be simplified, and the production efficiency can be improved. In addition, the battery pack can be conveniently disassembled and maintained by the connecting mode. Fixedly connecting the first connecting member 31 with the mounting portion 20 can effectively reduce the number of parts and assembly steps, and contribute to improvement of production efficiency and reduction of cost of the battery pack.

In some embodiments of the present application, the plurality of mounting portions 20 are spaced apart along the length and/or width of the body portion 10. For example, the body portion may be arranged in an array with the corner positions in the middle position or densely arranged in a heavy-load-bearing position. With promotion structure overall stability, realize more even load transfer route and better stress dispersion effect.

In some embodiments of the present application, the upper cover assembly further includes a second connection member 32, the second connection member 32 being for connection to an external structure, the second connection member 32 being fixedly connected with the first connection member 31 through the connection hole to fixedly connect the body portion 10 to the external structure. In the present embodiment, the second connector 32 includes, but is not limited to, a bolt, a rivet. Specifically, the second connection member 32 is fixed to the first connection member 31 and then riveted with the external structure, or the second connection member 32 is fixed to the external structure and then riveted with the first connection member 31.

On the basis of the above embodiment, the inner wall of the first connecting member 31 is provided with the female screw; the connection ends of the second connection member 32 and the first connection member 31 are provided with external threads engaged with the internal threads. The bolt has fine suitability with threaded connection, can adjust parameters such as length, intensity of bolt as required, helps satisfying the installation demand of different motorcycle types. Simultaneously, bolted connection dismantles conveniently, when needs change or maintenance battery package, can dismantle the battery package through loosening the bolt easily, greatly reduced the degree of difficulty and the cost of maintenance. In addition, the bolted connection has high tensile strength, shear strength and vibration resistance, and can effectively firmly connect the battery pack mounting portion 20 with the vehicle body cross member, contributing to ensuring structural stability of the battery pack and safety during running of the vehicle. In some embodiments of the present application, the bolting may achieve good air tightness by means of a compression gasket or the like, preventing moisture and dust from entering the inside of the battery pack, thereby improving the safety and sealability of the battery pack.

On the basis of the above embodiment, the second connector 32 is formed by using a rivet which is inserted into the first connector 31, and applying a force to the shank portion using a special tool (e.g., a riveter) so that the shank portion is compressed and expands to form a "back" within the first connector 31. At the same time, the head will tightly fix the workpiece. Rivet connections can provide high strength connections that can withstand large tensile, shear and vibratory loads. By means of back riveting, the rivet can ensure good sealing performance between workpieces. Rivet connections generally do not require the addition of additional metallic material compared to welded or threaded connections, and therefore can reduce weight and material costs.

In some embodiments of the present application, the first connection member 31 is configured as a cylinder having an opening toward the connection hole. In this embodiment, the first connecting member 31 is a cylinder having one end opening or both ends opening. When the cylinder body is open at one end, the opening faces the connecting hole so as to be connected with the second connecting piece 32 extending into the mounting part 20 through the side wall of the cylinder body, and one end (namely, the bottom) of the cylinder body, which is not open along the thickness direction of the body part 10, can be abutted with the second connecting piece 32 to form the limit of the second connecting piece 32. When the cylinder body is opened at two ends, the second connecting piece 32 can penetrate through the first connecting piece 31 to extend into the battery pack, so that the connection strength between the second connecting piece 32 and the battery pack is enhanced.

In some embodiments of the present application, the first connection member 31 is welded to the inner wall surface of the mounting portion 20. The welded connection has higher tensile and shear strength, and the welded connection of the first connecting member 31 and the mounting portion 20 can effectively improve the overall strength of the battery pack structure. The welded connection may be achieved by melting the base metal to form a weld, thereby achieving good gas tightness. This helps prevent moisture and dust from entering the inside of the battery pack, improving the safety and durability of the battery pack. As can be seen from the above embodiments, in the embodiment in which the first connecting member 31 is open at least at one end in the thickness direction of the body portion 10, and in the embodiment in which only one end is open, by welding the first connecting member 31 with the mounting portion 20, preferably, the first connecting member 31 is welded with the mounting portion 20 in a sealing manner, as shown in fig. 3, the position B is a welding area between the first connecting member 31 and the mounting portion 20, and welding areas are arranged between the upper end surface and the side wall of the first connecting member 31 and the mounting portion 20, and the welding areas between the first connecting member 31 and the mounting portion 20 are filled with welding materials to form a relative seal between the battery pack and the outside in the mounting portion 20, so as to meet the application requirements of the battery pack, etc. requiring waterproof and dustproof.

In some embodiments of the present application, the side walls of the mounting portion 20 are provided as a stepped structure 22. It will be appreciated that the side walls of the mounting portion comprise an inner wall and an outer wall, alternatively the inner wall and/or the outer wall may be provided with a stepped configuration. As shown in fig. 3, the step structure 22 may be provided in one stage or in multiple stages. The step structure 22 may strengthen the sidewall strength of the mounting part 20 to some extent, improving the structural stability of the entire battery pack. In addition, the step structure 22 can provide different installation positions and postures, so that the installation flexibility of the installation part 20 is improved, the installation requirements of different vehicle types can be met, and the universality of the battery pack is improved.

In some embodiments of the present application, the body part 10 forms the second receiving chamber 11 toward the other direction of the thickness direction of the body part 10. The second accommodating chamber 11 is used for accommodating other structures of the battery pack, such as a battery cell, a heat sink, etc.

On the basis of the above embodiment, the second accommodation chamber 11 communicates with the first accommodation chamber 21. As can be seen from the foregoing embodiments, the first accommodation chamber 21 is sealed relatively to the outside of the battery pack, so that the first accommodation chamber 21 is sealed relatively to the outside of the battery pack, and thus the inside of the battery pack can be secured relatively to the outside of the battery pack.

In some embodiments of the application, a glue layer 40 is provided in the second receiving chamber 11.

In some embodiments of the present application, a glue layer 40 is provided within the first receiving chamber 21. By the arrangement of the adhesive layer 40, the stress peak value at the convex hull can be effectively reduced, and structural cracking is avoided.

The glue layer 40 in the above embodiment is a foamed glue layer 40 and/or a structural glue layer 40. Preferably, the glue layer 40 is formed by glue filling and solidification. Optionally, the first containing chamber 21 and/or the second containing chamber 11 are automatically filled with a foaming glue. The first receiving chamber 21 and/or the second receiving chamber 11 use a structural adhesive. In some implementations of the present embodiment, the foaming glue is filled into the first accommodating cavity 21 and the second accommodating cavity 11, and the glue layer 40 is formed in the first accommodating cavity 21 and the second accommodating cavity 11 after foaming and solidification. In other implementations of this embodiment, the first receiving cavity 21 is filled with the structural adhesive, and after the structural adhesive is gelled, the structural adhesive is filled into the second receiving cavity 11. In the foregoing embodiment, after the upper cover assembly is filled with the glue, the first connecting member 31 is isolated from the inside of the battery pack, and the upper cover assembly can be directly connected with the battery cell, thereby ensuring good sealing performance inside the battery pack. The glue layer 40 can provide a good seal against moisture and dust entering the interior of the battery pack. The adhesive layer 40 has elasticity, and can effectively absorb vibration and impact, and improve the impact resistance and vibration resistance of the battery pack; the glue layer 40 can also play a certain role in sound insulation and noise reduction, and can also improve the heat preservation performance and the insulation performance of the battery pack.

In the present utility model, the secondary sealing can be formed by the welded connection of the first connector 31 and the mounting portion 20 and the provision of the adhesive layer 40, and the sealability of the battery pack can be ensured. Specifically, the first sealing is achieved by at least one of the pre-tightening force of the bolts, the elasticity of the washers, and the welded connection, and the second sealing is achieved by the filling of the glue layer 40.

In some embodiments of the present application, the battery pack further includes a connection part 50, the connection part 50 being disposed at the outer circumference of the body part 10 for connection with the lower case of the battery pack. Preferably, the connection part 50 is provided with a connection hole, and the upper cover assembly is connected with the lower case by a bolt.

The utility model also provides a battery pack, which comprises the upper cover assembly, the lower shell and the battery cell, wherein the upper cover assembly is covered on the lower shell to form a containing cavity, and the battery cell is contained in the containing cavity. The upper cover assembly has the advantages of high structural strength, good sealing performance and low manufacturing cost while being convenient to install, and meanwhile, the energy density and the electricity storage capacity of the battery pack can be improved under the same external size.

The utility model also provides electric equipment, which comprises the equipment main body and the battery pack, wherein the battery pack is arranged on the equipment main body and is used for supplying power to the equipment main body. The electric equipment provided by the utility model has the advantages of improving the energy density and the electricity storage capacity, improving the safety performance, facilitating the installation and the maintenance, reducing the cost, lightening the weight and the like. Wherein the consumer is, for example, a vehicle.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the utility model. Terms such as "disposed" or the like as used herein may refer to either one element being directly attached to another element or one element being attached to another element through an intermediate member. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.

The present utility model has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed.

Claims

1. A cover assembly for a battery pack, comprising:

A body portion;

at least one mounting part, at least one mounting part and the body part are integrally formed, the mounting part protrudes along one side of the thickness direction of the body part, a first accommodating cavity is formed on the other side of the mounting part along the thickness direction of the body part, and a connecting hole is formed at the top of the mounting part; and

2. The cover assembly of the battery pack according to claim 1, wherein the first connection member is configured as a cylinder having an opening toward the connection hole; and/or

3. The upper cover assembly of the battery pack according to claim 1, wherein the sidewall of the mounting part is provided in a stepped structure.

4. The upper cover assembly of the battery pack according to claim 1, wherein a second receiving chamber is formed at a side of the body portion adjacent to the first receiving chamber, and the second receiving chamber communicates with the first receiving chamber.

5. The upper cover assembly of the battery pack as claimed in claim 4, wherein,

An adhesive layer is arranged in the second accommodating cavity; and/or

And a glue layer is arranged in the first accommodating cavity.

6. The battery pack cover assembly of claim 5, wherein the glue layer is a foam glue layer and/or a structural glue layer.

7. The lid assembly of claim 1, further comprising a second connector for connecting to an external structure, the second connector fixedly connected to the first connector through the connection hole to fixedly connect the body portion to the external structure.

8. The battery pack top cover assembly of claim 7, wherein,

The inner wall of the first connecting piece is provided with an internal thread;

9. The battery pack cover assembly according to claim 1, wherein a plurality of the mounting portions are provided at intervals in a length direction and/or a width direction of the body.

10. The upper cover assembly of the battery pack according to claim 1, further comprising a connection portion provided at an outer circumference of the body portion for connection with a lower case of the battery pack.

11. A battery pack comprising the upper cover assembly and the lower case according to any one of claims 1 to 10, and a battery cell, the upper cover assembly being covered on the lower case to form a receiving cavity, the battery cell being received in the receiving cavity.

12. A powered device comprising a device body and the battery pack of claim 11, the battery pack being mounted to the device body and configured to supply power to the device body.