CN218602576U

CN218602576U - Top cap subassembly, battery and battery package

Info

Publication number: CN218602576U
Application number: CN202222985503.1U
Authority: CN
Inventors: 靖梦圆; 袁铖; 林秀德
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-03-10
Anticipated expiration: 2032-11-09

Abstract

The embodiment of the application provides a top cap subassembly, battery and battery package, top cap subassembly includes: a plastic top cover sheet having a first stiffness; and the frame is arranged in the top cover plate and has second rigidity, and the second rigidity is greater than the first rigidity. Through embedding the great frame of rigidity in plastic top cap piece, making the top cap piece to the condition of predetermineeing thickness, compare with the same thickness top cap piece that does not embed the frame, can improve top cap subassembly's intensity, reduce the probability that top cap subassembly receives the external force deformation condition to take place, reduce the risk that top cap subassembly damaged to promote the compatibility to equipment.

Description

Top cap subassembly, battery and battery package

Technical Field

The utility model relates to a battery technology field especially relates to a top cap subassembly, battery and battery package.

Background

The power battery is a power supply for providing a power source for tools, and is a storage battery for providing power for electric automobiles, electric trains and electric bicycles, and has a wide application prospect in electric vehicles such as the electric automobiles and the electric bicycles, medium and large electric equipment such as energy storage equipment.

Among them, the top cover in the battery is generally thin and easily deformed, resulting in a decrease in compatibility with the device.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a top cover assembly, a battery and a battery pack, so that the phenomenon that the compatibility of equipment is reduced due to the fact that the top cover is thin and easy to deform is reduced.

The embodiment of the application provides a top cap assembly, includes:

a plastic top cover sheet having a first stiffness; and

a frame disposed within the top cover sheet, the frame having a second stiffness, the second stiffness being greater than the first stiffness.

In some embodiments, the frame comprises:

the rib structure comprises at least one rib, a plurality of ribs and a plurality of connecting pieces, wherein the at least one rib is arranged at intervals along a first direction, each rib extends along a second direction, and the second direction is perpendicular to the first direction;

and the connecting frame extends along the first direction and is connected with the at least one rib.

In some embodiments, in the first direction, a length of the attachment shelf is less than or equal to a length of the top flap; and/or

In the second direction, the length of each rib is smaller than or equal to the width of the top cover sheet.

In some embodiments, the thickness of the top cover sheet is greater than or equal to the thickness of the connecting frame in a third direction perpendicular to the first direction and the second direction, respectively; and/or the thickness of the top cover sheet is greater than or equal to the thickness of each rib.

In some embodiments, the top cover sheet is provided with a blast hole between two adjacent ribs.

In some embodiments, the link frame is annular and the blast hole is in an annular space of the link frame.

In some embodiments, the cap assembly further comprises:

the explosion-proof valve is arranged on one side of the top cover plate and covers and seals the explosion-proof hole;

and the reinforcing rib and the explosion-proof valve are arranged on the same side of the top cover plate and surround the explosion-proof valve.

In some embodiments, two reinforcing ribs are respectively arranged on the top cover sheet along two opposite sides of the explosion-proof valve, and each reinforcing rib is arranged in a crossed manner; and/or

The stiffener has a third stiffness that is greater than or equal to the first stiffness.

In some embodiments, the top cover sheet is further provided with a plurality of functional holes arranged along the first direction, and one rib is arranged between at least two of the functional holes.

An embodiment of the present application further provides a battery, including:

a housing having an accommodating space and an opening communicating with each other;

the battery cell is arranged in the accommodating space; and

a cap assembly connected to the housing and covering the opening; the cap assembly is as described in any of the above.

An embodiment of the present application further provides a battery pack, including:

a box body; and

the battery box comprises a box body, a plurality of batteries and a plurality of storage batteries, wherein the box body is provided with a box body, and the batteries are arranged in the box body.

In the top cap subassembly, battery and battery package that this application embodiment provided, through the great frame of embedding rigidity in plastic top cap piece, under the condition of will top cap piece preparation to predetermineeing thickness, compare with the same thickness top cap piece that does not embed the frame, can improve top cap subassembly's intensity, reduce the probability that top cap subassembly receives the external force deformation condition to take place, reduce the risk that top cap subassembly damaged to promote the compatibility to equipment.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application.

Fig. 2 is a schematic structural view of a battery in the battery pack shown in fig. 1.

Fig. 3 is a schematic structural diagram of a first cover assembly according to an embodiment of the present disclosure.

Fig. 4 is a first angled configuration of the cap assembly shown in fig. 3.

Fig. 5 is a schematic view of a second angle in the cap assembly shown in fig. 3.

Fig. 6 is a schematic structural diagram of a second structure of a top cover assembly according to an embodiment of the present application.

Description of the reference numerals

1-Battery pack 10-Box 20-Battery

21-housing 210-receiving space 212-opening

22-cell 23-top cap assembly 230-top cover sheet

2300-explosion proof hole 2302-functional hole 232-frame

2320-rib 2322-connecting frame 234-explosion-proof valve

236-reinforcing rib X-first direction Y-second direction

Z-third direction.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present disclosure. The embodiment of the application provides a battery pack 1, and the battery pack 1 comprises a box body 10 and a plurality of batteries 20, wherein the box body 10 is provided with a containing space. The plurality of batteries 20 are electrically connected to each other and disposed in the receiving space of the case 10. For example, the battery pack 1 may be applied to electric devices, such as portable electronic devices, e.g., mobile phones, digital cameras, and portable computers, and also electric devices, such as vehicles, e.g., electric cars and electric bicycles, and energy storage devices. The number of the batteries 20 may be selected according to the power consumption parameters of the electric device. It is understood that the capacity of the battery pack 1 is in positive correlation with the number of the batteries 20, and the larger the number of the batteries 20, i.e. the larger the capacity of the battery pack 1, the longer the battery pack 1 can supply power.

Referring to fig. 2 in conjunction with fig. 1, fig. 2 is a schematic structural diagram of a battery in the battery pack shown in fig. 1. The battery 20 includes a case 21, a cell 22, and a cap assembly 23, and the case 21 has a receiving space 210 and an opening 212 communicating with each other. The battery cell 22 is disposed in the accommodating space 210, and the battery cell 22 is a main component of the battery 20 and is also a main component of the power supply and charging functions of the battery 20. The cap assembly 23 is connected to the housing 21 and covers the opening 212. In the case of the battery 20 such as a lithium ion battery, an electrolyte, which is a medium for moving, for example, lithium ions, is also provided in the case 21. The casing 21 and the cap assembly 23 are used to encapsulate the battery cell 22, so as to prevent the battery cell 22 from being attacked by moisture, which may cause safety accidents.

Among them, the top cover assembly in the battery is generally thin, and the top cover assembly is generally long and is easily deformed, resulting in reduced compatibility with the device.

In order to solve the above problem, the embodiment of the present application improves the structure of the top cover assembly 23.

Referring to fig. 3 in conjunction with fig. 1 and fig. 2, fig. 3 is a first structural schematic diagram of a top cover assembly according to an embodiment of the present disclosure. The top cover assembly 23 includes a plastic top cover sheet 230 and a frame 232, the top cover sheet 230 being formed by plastic injection molding, the top cover sheet 230 having a first stiffness. The frame 232 is disposed within the top cover sheet 230, such as the frame 232 may be embedded within the top cover sheet 230. The frame 232 has a second stiffness that is greater than the first stiffness. It should be noted that the top cover sheet 230 is made of plastic, the top cover sheet 230 may have elasticity, and the first rigidity of the top cover sheet 230 may be measured by the elastic modulus. The frame 232 may be made of a relatively rigid or strong material, such as a metal, which is commonly used to make relatively rigid metals such as steel. The frame 232 is not easily deformed, and the second stiffness of the frame 232 can also be measured by the modulus of elasticity. The second stiffness is greater than the first stiffness, i.e., the modulus of elasticity of the material of the frame 232 is greater than the modulus of elasticity of the material of the top cover sheet 230.

In the top cap subassembly 23 that this application embodiment provided, through the great frame 232 of embedding rigidity in plastic top cap piece 230, under the condition with top cap piece 230 preparation to default thickness, compare with the same thickness top cap piece that does not embed the frame, can improve top cap subassembly 23's intensity, reduce top cap subassembly 23 and receive the probability that the external force deformation condition takes place, reduce the risk that top cap subassembly 23 damaged to promote the compatibility to equipment.

Illustratively, the top cover sheet 230 may be a rectangular sheet, and the size of the top cover sheet 230 is adapted to the size of the housing 21. The top cover 230 is formed by plastic injection molding, and when it is coupled to the housing 21, it can improve the sealing property of the coupling with the housing 21.

The frame 232 is embedded in the top cover sheet 230, and the shape of the frame 232 may take various forms.

Illustratively, the frame 232 includes a connecting frame 2322 and at least one rib 2320, the at least one rib 2320 is arranged at intervals along a first direction X, and each rib 2320 extends along a second direction Y, the second direction Y is perpendicular to the first direction X, for example, the first direction X may be a length direction of the top cover sheet 230, and the second direction Y may be a width direction of the top cover sheet 230. The connection frame 2322 extends in the first direction X and connects the at least one rib 2320.

Wherein, in the first direction X, the length of the connection frame 2322 is less than or equal to the length of the top cover sheet 230. In the second direction Y, the length of each rib 2320 is less than or equal to the width of the top sheet 230. It is understood that the connection frame 2322 connects all the ribs 2320, and the connection frame 2322 and all the ribs 2320 are embedded in the top cover sheet 230, the connection frame 2322 extends along the first direction X, and the length of the connection frame 2322 does not exceed the length of the top cover sheet 230. Each rib 2320 extends in the second direction, and the length of each rib 2320 does not exceed the width of the top cover sheet 230. The top cover assembly 23 arranged in this way can realize sufficient supporting strength, and can not extend out of the frame 232 made of metal, so that the aesthetic degree of the top cover assembly 23 is improved, and the interference to other structures can be reduced.

The number of the ribs 2320 may be set adaptively according to the devices to be provided on the top-cover sheet 230. For example, the top cover sheet 230 may be provided with a plurality of functional holes 2302 and an explosion-proof hole 2300, the explosion-proof hole 2300 being used to provide an outlet for the electrolyte when a thermal runaway phenomenon occurs in the battery 20. The functional hole 2302 is used to mount components such as positive and negative poles, or the functional hole 2302 may be a liquid injection hole through which an electrolyte may be added to the case 21 of the battery 20. The explosion proof hole 2300 and the plurality of functional holes 2302 may be arranged at intervals in the first direction X.

Among them, since the strength of the top cover sheet 230 around the explosion proof hole 2300 is weak, a frame 232 may be provided around the explosion proof hole 2300 to increase the strength of the top cover sheet 230 around the explosion proof hole 2300. For example, the explosion proof hole 2300 may be positioned between two adjacent ribs 2320. For another example, the connecting frame 2322 may have an annular shape, and the explosion-proof hole 2300 is located in an annular space of the connecting frame 2322. The top cover assembly 23 arranged in this way supports the top cover sheet 230 around the explosion-proof hole 2300 with weak strength, so that the strength of the top cover sheet 230 around the explosion-proof hole 2300 can be improved, and the probability of deformation of the top cover sheet 230 around the explosion-proof hole 2300 is reduced.

Illustratively, one rib 2320 may be provided between at least two of the plurality of functional apertures 2302. As shown in fig. 3, a rib 2320 may also be provided between each adjacent two of the functional apertures 2302. The ribs 2320 are uniformly arranged in the length direction, i.e., the first direction X, of the top sheet 230, so that the overall strength of the top sheet 230 can be improved, and the probability of deformation of the top sheet 230 can be reduced.

Similarly, the frame 232 does not extend beyond the top flap 230 in the thickness direction of the top flap 230, as would be the case if the frame 232 did not extend beyond the top flap 230 in both the length direction and the width direction of the top flap 230.

Referring to fig. 4 in conjunction with fig. 1 to 3, fig. 4 is a schematic view illustrating a first-angle structure of the top cover assembly shown in fig. 3. Illustratively, in a third direction Z perpendicular to the first direction X and the second direction Y, respectively, the third direction Z may be a thickness direction of the top cover sheet 230, for example. The thickness of the top sheet 230 is greater than or equal to the thickness of the connection frame 2322, and/or the thickness of the top sheet 230 is greater than or equal to the thickness of each rib 2320. It will be appreciated that the weight of the frame 232 is greater than that of the top cover sheet 230 due to the same volume of the frame 232. The thickness of the frame 232 is set to be not more than the thickness of the top cover sheet 230, so that the weight of the top cover assembly 23 can be reduced on the basis of ensuring the supporting strength of the top cover assembly 23, or the supporting strength of the top cover assembly 23 can be improved on the basis of ensuring that the top cover assembly 23 has a certain weight.

It should be noted that the explosion-proof hole 2300 occupies a larger area of the top cover plate 230 than the functional hole 2302 occupies the top cover plate 230, and a reinforcing structure may be further provided on the top cover plate 230 on the basis of the ribs 2320 and the connecting frame 2322 provided around the explosion-proof hole 2300.

For example, referring to fig. 5 in conjunction with fig. 1 to 4, fig. 5 is a schematic structural view of a second angle in the top cover assembly shown in fig. 3. The cap assembly 23 also includes an explosion-proof valve 234 and a stiffener 236. The explosion-proof valve 234 is disposed at one side of the top cover sheet 230 and covers the explosion-proof hole 2300. The reinforcing rib 236 and the explosion-proof valve 234 are arranged on the same side of the top cover plate 230 and surround the explosion-proof valve 234. For example, the explosion-proof valve 234 and the rib 236 are disposed on a side of the top cover sheet 230 facing away from the housing 21, which may also be referred to as an outer side of the battery 20. The reinforcement rib 236 is disposed around the explosion-proof valve 234, which can enhance the strength of the connection between the explosion-proof valve and the top cover plate 230 to reduce the probability of deformation of the connection.

The stiffener 236 may have a third stiffness that is greater than or equal to the first stiffness. It can be appreciated that the ribs 236 can be made of the same material as the top cover piece 230, such as by injection molding, and can be easily machined on the basis of increasing the strength of the top cover piece 230. The ribs 236 may also be made of a material having a different stiffness than the top sheet 230, such as a material having a greater stiffness than the top sheet 230, so as to enhance the reinforcing effect of the ribs 236.

The shape of the ribs 236 may be elongated or cross-shaped. Illustratively, two ribs 236 are provided on the top cover sheet 230 along opposite sides of the explosion-proof valve 234.

For example, each of the ribs 236 may be a long bar shape, two ribs 236 are parallel to each other along the first direction X and are disposed on the left and right sides of the explosion-proof valve 234, and/or two ribs 236 are parallel to each other along the second direction Y and are disposed on the upper and lower sides of the explosion-proof valve 234.

For another example, two ribs 236 are arranged in a cross, or each rib 236 is in a cross shape. The two ribs 236 are disposed opposite to each other along the first direction X on both left and right sides of the explosion-proof valve 234.

Of course, the rib 236 could have other shapes, such as a circular ring shape disposed around the explosion-proof valve 234. The ribs 236 are primarily intended to reinforce the top cover sheet 230 in the area adjacent the explosion-proof valve 234, and thus many differently shaped ribs 236 may be provided, which are merely illustrative and should not be construed as limiting the shape of the ribs 236.

In the top cap subassembly 23, battery 20 and battery package 1 that this application embodiment provided, through the great frame 232 of embedding rigidity in plastic top cover plate 230, make top cover plate 230 to the condition of presetting thickness, compare with the same thickness top cover plate that does not embed the frame, can improve top cap subassembly 23's intensity, reduce the probability that top cap subassembly 23 received the deformation condition of external force to take place, reduce the risk that top cap subassembly 23 damaged, thereby promote the compatibility to equipment. In addition, the provision of the reinforcing ribs 236 in the area of the top cover sheet 230 adjacent to the explosion-proof valve 234 increases the strength of the top cover sheet 230 adjacent to the explosion-proof valve 234 and reduces the risk of damage to the top cover assembly 23.

The top cover assembly, the battery and the battery pack provided by the embodiment of the application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A header assembly, comprising:

a plastic top cover sheet having a first stiffness; and

2. The header assembly of claim 1, wherein the frame comprises:

3. The header assembly of claim 2, wherein a length of the connecting frame is less than or equal to a length of the header flap in the first direction; and/or

4. The header assembly of claim 2, wherein a thickness of the header sheet is greater than or equal to a thickness of the connection frame in a third direction perpendicular to the first and second directions, respectively; and/or the thickness of the top cover sheet is greater than or equal to the thickness of each rib.

5. The header assembly of claim 2, wherein the header sheet is provided with a blast hole between two adjacent ribs.

6. The header assembly of claim 5, wherein the connecting frame is annular and the blast hole is in an annular space of the connecting frame.

7. The header assembly of claim 5, further comprising:

8. The top cap assembly of claim 7, wherein two of said ribs are disposed on said top cap piece along opposite sides of said explosion-proof valve, respectively, each of said ribs being disposed in a cross-over arrangement; and/or

9. The header assembly of claim 2, wherein the header sheet is further provided with a plurality of functional holes arranged in the first direction, and at least two of the functional holes are provided with one of the ribs therebetween.

10. A battery, comprising:

the battery cell is arranged in the accommodating space; and

a cap assembly connected to the housing and covering the opening; the cap assembly of any one of claims 1-9.

11. A battery pack, comprising:

a box body; and

a plurality of batteries, each of said batteries according to claim 10, said plurality of batteries being electrically connected to each other and disposed within said housing.