CN217485657U

CN217485657U - Top cap subassembly, battery monomer, battery and consumer

Info

Publication number: CN217485657U
Application number: CN202221040732.XU
Authority: CN
Inventors: 陈圣旺; 张小平; 郭志君
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-09-23
Anticipated expiration: 2032-04-29
Also published as: WO2023207402A1

Abstract

The application relates to the technical field of batteries, and specifically discloses a top cover assembly, a battery monomer, a battery and electric equipment. The utility model provides a top cap subassembly includes base and valve block, and the outward flange of valve block is located to the base ring, is equipped with at least one on the valve block and connects nick and at least one blasting nick, connects the nick and links to each other with the blasting nick and encloses into two at least blasting regions, and wherein, the thickness dimension of the valve block of connecting the nick department is greater than the thickness dimension of the valve block of blasting nick department, and the thickness dimension of the valve block of connecting the nick department is less than the whole thickness dimension of valve block. Through the top cap subassembly of this application, form a plurality of fragments that break away from top cap subassembly when can preventing that the valve block from opening, security and reliability when improving top cap subassembly and using.

Description

Top cap subassembly, battery monomer, battery and consumer

Technical Field

The application relates to the technical field of batteries, and specifically discloses a top cover assembly, a battery monomer, a battery and electric equipment.

Background

With the increasing prominence of environmental problems, people are actively advocating low-carbon economy. New energy vehicles are emerging with increasingly severe air quality. Manufacturers and consumers are gradually accepting hybrid electric vehicles and pure electric vehicles as representative new energy vehicles. The power battery is used as a main power source of the new energy automobile and becomes one of the core components of the electric automobile.

In the existing scheme, in order to ensure that the power battery has high capacity and better safety and cycle life, a valve plate is arranged on a top cover plate of a common power battery, and the valve plate of the power battery can be opened in time to discharge gas generated in the power battery under special conditions (such as thermal runaway, short circuit and the like) of the power battery, so that the safety of the power battery is improved.

However, in practical use of the power battery, the whole valve plate is easily and completely broken and forms a plurality of fragments separated from the top cover plate, and the fragments are also easy to damage other parts and influence the safety of the power battery.

SUMMERY OF THE UTILITY MODEL

In view of the defects in the prior art, the application provides a top cover assembly, a single battery, a battery and electric equipment, which can solve the problem that a plurality of fragments separated from the top cover assembly are formed when a valve plate is opened.

In a first aspect, the present application provides a header assembly comprising:

a base;

the valve block, the base ring establish connect in the outward flange of valve block, be equipped with at least one connection nick and at least one blasting nick on the valve block, connect the nick with the blasting nick links to each other and encloses into two at least blasting regions, wherein, connect nick department the thickness size of valve block is greater than blasting nick department the thickness size of valve block, just connect nick department the thickness size of valve block is less than the whole thickness size of valve block.

In the technical scheme of this application, connect nick and blasting nick through the setting, make and connect nick and blasting nick and link to each other and enclose into two at least blasting regions, wherein at least one blasting region is including connecting the nick, wherein the thickness dimension of the valve block of connecting the nick department is greater than the thickness dimension of the valve block of blasting nick department, thereby when the valve block is opened, the valve block of connecting the nick department is more difficult for blasting nick department valve block to break off, thereby blast region links to each other with the valve block of connecting the nick department when the valve block is opened, form a plurality of fragments that break away from the top cap subassembly when preventing the valve block from opening, simultaneously to the impact force of the valve block of connecting the nick department when reducing the valve block and opening, prevent that the valve block of connecting the nick department from breaking, the thickness dimension of the valve block of connecting the nick department is less than the whole thickness dimension of valve block, thereby make the valve block of nick department connect the nick to buckle deformation more easily for the valve block whole, and reduce the impact force that the blasting region received effectively at buckling deformation's in-process, prevent that the valve block of connecting nick department from taking place the fracture, and simultaneously, link to each other and enclose into two at least blasting regions through connecting nick and blasting nick, separate into two at least blasting regions that are relatively little with the valve block, thereby reduce the regional impact force of blasting after separating, thereby further reduce the impact force that the valve block of connecting nick department bore, and then guarantee the reliability of being connected of the regional valve block of blasting and connecting nick department, form a plurality of fragments that break away from the top cap subassembly when preventing that the valve block from opening, security and reliability when improving the top cap subassembly and using.

In some embodiments, any one of said burst regions is provided with at least one said connecting score. Through all being equipped with at any blasting region and connecting the nick, when the valve block was opened, any blasting region opened the back under the effect of gas impact force respectively with be connected the valve block of nick department and link to each other, and then avoided any blasting region to break away from top cap subassembly and form the piece when the valve block is opened.

In some embodiments, the connecting score is a straight segment structure. The straightway structure is easier to bend and deform relative to structures with other shapes, such as an arc-shaped section, so that the impact force applied to the valve plate at the connecting nick is reduced, and the valve plate at the connecting nick is prevented from being broken.

In some embodiments, the connecting score has a length of 4mm or greater. Such setting can guarantee that the valve block of connecting nick department has certain joint strength, even still can reliably be connected with the blasting region after buckling deformation to prevent to connect the valve block of nick department and take place the fracture, and then break away from the base and form the piece after preventing the valve block blasting.

In some embodiments, at least one of the connection scores comprises a first connection score and a second connection score, and at least one of the blasting scores comprises a first blasting score, a second blasting score and a third blasting score, wherein the first connection score, the first blasting score, the second connection score and the second blasting score are sequentially connected end to end, and two ends of the third blasting score are respectively connected with the first blasting score and the second blasting score. Through connecting first nick, first blasting nick, second connection nick and second blasting nick end to end in proper order and close into blasting region, link to each other the both ends of third blasting nick with first blasting nick and second blasting nick respectively simultaneously, separate into two blasting regions with the valve block, and two blasting regions all include the connection nick, thereby can reduce the impact that the valve block of the connection nick department in any blasting region bore effectively, prevent the valve block of connection nick department from breaking, avoid any blasting region to break away from the top cap subassembly and form the piece.

In some embodiments, n connecting notches and 2n-1 blasting notches are arranged on the valve plate, wherein n is greater than or equal to 2, n connecting notches and 2n-1 blasting notches surround n blasting areas, any blasting area is a closed area surrounded by the connecting notches and the blasting notches, and only one connecting notch is arranged in any blasting area. Not only be limited to only including two blasting regions on the valve block in this application, in order to further reduce the impact force that any blasting region bore, still can separate into a plurality of blasting regions with the valve block through the setting of connecting nick and blasting nick, any blasting region in a plurality of corresponding blasting regions all includes a connection nick, any blasting region is opened the back under the effect of gas impact force and is linked to each other with the valve block of being connected nick department respectively, and then avoid any blasting region to break away from the top cap subassembly and form the piece when the valve block is opened.

In some embodiments, the connecting notch is spaced from the outer edge of the valve flap, and the bursting notch is spaced from the outer edge of the valve flap. Because the outward flange of valve block is located to the base ring in this application, sets up through the outward flange interval that will connect nick and valve block, can avoid locating the junction of valve block and base with connecting the nick to further improve the joint strength of the valve block of connecting the nick department. Because the blasting nick links to each other and encloses into the blasting region with connecting the nick, consequently, set up the blasting nick equally to the outward flange interval with the valve block and set up to be connected with connecting the nick and take the advantage of the situation, thereby be convenient for the blasting nick fracture when the valve block is opened.

In some embodiments, at least one reinforcing score is provided in any one of the burst regions, and both ends of the reinforcing score are connected to the burst scores located at both ends of the connecting score, respectively. Through setting up the enhancement nick, can improve the anti deformability of valve block to in top cap assembly's transport and transportation, can not lead to opening of valve block because of external force oppression, avoid the valve block under the condition of not discharging battery internal pressure yet, lose the effect promptly. Simultaneously, will strengthen the both ends of nick and link to each other with the blasting nick that is connected the both ends of nick respectively, make and connect the nick to locate in the region of strengthening the nick and blasting nick enclose, can not cause the influence to the joint strength who connects the nick.

In some embodiments, the thickness of the valve plate is smaller than that of the base, and at least one surface of the valve plate is recessed relative to the surface of the base on the same side. Above-mentioned structural design can guarantee the joint strength of other parts on base and the top cap subassembly, and the valve block breaks for the base takes place more easily simultaneously to when the inside gas of battery is discharged to needs, the blasting region of valve block can take place to break and open, and the valve block passes through pedestal connection on the other parts of top cap subassembly.

In a second aspect, the present application provides a battery cell having the top cap assembly of the above embodiment.

In a third aspect, the present application provides a battery having the battery cell of the above embodiment.

In a fourth aspect, the present application provides an electric device having the battery in the above embodiment.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure;

fig. 4 is an exploded schematic view of a battery cell according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a portion of a cap assembly according to an embodiment of the present disclosure;

FIG. 6 is a cross-sectional view taken along line A-A of a cap assembly according to one embodiment of the present application;

fig. 7 is an enlarged schematic structural diagram of a portion B of a top cover assembly according to an embodiment of the present disclosure;

FIG. 8 is an enlarged view of the top cover assembly of the present application;

fig. 9 is an enlarged schematic view of a portion D of a top cover assembly according to an embodiment of the present disclosure;

FIG. 10 is an enlarged schematic view of a portion E of the cap assembly according to an embodiment of the present disclosure;

fig. 11 is a partial structural schematic view of a cap assembly according to an embodiment of the present disclosure.

The reference numbers in the detailed description are as follows:

1: a vehicle;

10: battery, 11: controller, 12: a motor;

20: battery module, 21: battery cell, 211: a housing, 212: an electrode assembly;

30: case, 301: first part, 302: a second portion;

40: top cover assembly, 40 a: an electrode terminal;

41: a base;

42: valve plate, 421: first burst region, 422: second burst region, 423: a third blasting area;

431: first connecting score, 432: second connecting score, 433: a third connecting notch;

441: first blast score, 442: second blast score, 443: third blast score, 444: fourth blast score, 445: a fifth blasting notch;

451: first reinforcing score, 452: a second reinforcing score.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are merely used to more clearly illustrate the technical solutions of the present application, and therefore, the following embodiments are only used as examples, and the scope of the present application is not limited thereby.

It should be noted that technical terms or scientific terms used in the embodiments of the present application should be given ordinary meanings as understood by those skilled in the art to which the embodiments of the present application belong, unless otherwise specified.

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, and are used only for convenience in describing the embodiments of the present application and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the embodiments of the present application.

Furthermore, the technical terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles and electric automobiles, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding. In order to ensure that the power battery has high capacity and better safety and cycle life, the valve plate is arranged on the top cover plate of the common power battery, and the valve plate of the power battery can be opened in time to discharge gas generated in the power battery under special conditions (such as thermal runaway, short circuit and the like) of the power battery, so that the safety of the power battery is improved.

The inventor notices that in the practical use of the power battery, the whole valve plate is easily and completely flushed and forms a plurality of fragments separated from the top cover plate, and the fragments separated from the top cover plate easily damage other parts in the power battery, so that the safety of the power battery is influenced.

In order to solve the problem that the valve plate forms a plurality of fragments separated from the top cover assembly in the opening process, the applicant researches and discovers that the valve plate is provided with a blasting indentation area, and the thickness of the valve plate at the blasting indentation area is smaller than that of the valve plate body, so that the blasting indentation area is easy to break relative to other areas on the valve plate, and the valve plate is opened. The fractured burst region may break away from the connection with the cap assembly and form fragments that may impact or damage other components within the battery. Consequently need set up the connecting portion that are used for connecting the blasting region to prevent that the blasting region from forming the piece that breaks away from the top cap subassembly, and connecting portion need have certain shock resistance, prevent when the valve block is opened, connecting portion breaking occur, make the regional piece that breaks away from the top cap subassembly that forms of blasting.

Based on above consideration, in order to solve the problem that the valve block forms a plurality of fragments that break away from top cap assembly in the opening process, the inventor has conducted extensive research, a top cap assembly has been designed, through set up the connection nick on top cap assembly, connect blasting nick and top cap assembly through connecting the nick, thereby prevent to explode regional formation when the valve block is opened and break away from a plurality of fragments of top cap assembly, and simultaneously, in order to reduce the impact force to connecting the nick, separate into the blasting region more than two at least with the valve block, improve the connection reliability of connecting the nick. When the valve block is opened, because the valve block is separated into a plurality of blasting regions to linking to each other at least part of blasting region through connecting the nick with the top cap subassembly, thereby can reducing the impact force to the valve block of connecting the nick department, make blasting region still can link to each other with the valve block of connecting the nick department after opening, thereby form the problem that breaks away from a plurality of fragments of top cap subassembly when reducing or having avoided the valve block to open.

The application provides a top cap assembly, and including this kind of top cap assembly's battery and the consumer that uses this battery. Such a cap assembly is applicable to any battery such as a battery module and a battery pack, or a primary battery and a secondary battery, for example, a secondary battery including a nickel hydrogen battery, a nickel cadmium battery, a lead acid (or lead storage) battery, a lithium ion battery, a sodium ion battery, a polymer battery, and the like. The battery is suitable for various electric equipment using the battery, such as mobile phones, portable equipment, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships, spacecrafts and the like, for example, the spacecrafts comprise airplanes, rockets, space shuttles, spacecrafts and the like; the battery is used for providing electric energy for the electric equipment.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the above-described battery and electric equipment, but may be applied to all batteries including a box and electric equipment using the battery.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1 according to some embodiments of the present disclosure. The vehicle 1 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like. The interior of the vehicle 1 is provided with a battery 10, and the battery 10 may be provided at the bottom or at the head or tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, and for example, the battery 10 may serve as an operation power source of the vehicle 1. The vehicle 1 may further include a controller 11 and a motor 12, the controller 11 being configured to control the battery 10 to power the motor 12, for example, for start-up, navigation, and operational power requirements while the vehicle 1 is traveling.

In some embodiments of the present application, the battery 10 may be used not only as an operation power source of the vehicle 1, but also as a driving power source of the vehicle 1, instead of or in part of fuel or natural gas, to provide driving power for the vehicle 1.

In order to meet different power requirements, the battery 10 may include a plurality of battery cells 21, and the battery cells 21 refer to the smallest unit constituting the battery module 20 or the battery pack. A plurality of battery cells 21 may be connected in series and/or in parallel via electrode terminals to be applied to various applications. The battery referred to in this application includes a battery module 20 or a battery pack. The plurality of battery cells 21 may be connected in series, in parallel, or in series-parallel, where series-parallel refers to a mixture of series connection and parallel connection. Battery 10 may also be referred to as a battery pack. In the embodiment of the present application, the plurality of battery cells 21 may directly constitute the battery pack, or the battery module 20 may be first constituted, and then the battery module 20 may constitute the battery pack.

Fig. 2 shows a schematic structural view of the battery 10 according to an embodiment of the present application. In fig. 2, the battery 10 may include a plurality of battery modules 20 and a case 30, and the plurality of battery modules 20 are accommodated inside the case 30. The case 30 is used to accommodate the battery cells 21 or the battery module 20 to prevent liquid or other foreign substances from affecting the charge or discharge of the battery cells 21. The box body 30 may be a single cuboid, a cylinder, a sphere, or other simple three-dimensional structure, or may be a complex three-dimensional structure formed by combining cuboid, cylinder, or sphere, which is not limited in the embodiments of the present application. The material of the box 30 may be an alloy material such as an aluminum alloy and an iron alloy, a polymer material such as polycarbonate and polyisocyanurate foam, or a composite material of glass fiber and epoxy resin, which is not limited in the embodiment of the present invention.

In some embodiments, the case 30 may include a first portion 301 and a second portion 302, the first portion 301 and the second portion 302 cover each other, and the first portion 301 and the second portion 302 jointly define a space for accommodating the battery cell 21. The second part 302 may be a hollow structure with one open end, the first part 301 may be a plate-shaped structure, and the first part 301 covers the open side of the second part 302, so that the first part 301 and the second part 302 jointly define a space for accommodating the battery unit 21; the first portion 301 and the second portion 302 may be hollow structures with one side open, and the open side of the first portion 301 covers the open side of the second portion 302.

Fig. 3 shows a schematic structural view of the battery module 20 according to an embodiment of the present application. In fig. 3, the battery module 20 may include a plurality of battery cells 21, the plurality of battery cells 21 may be connected in series or in parallel or in series-parallel to form the battery module 20, and the plurality of battery modules 20 may be connected in series or in parallel or in series-parallel to form the battery 40. In the present application, the battery cells 21 may include a lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiment of the present application. The battery cell 21 may be a cylinder, a flat body, a rectangular parallelepiped, or another shape, which is not limited in the present embodiment. The battery cells 21 are generally divided into three types in an encapsulated manner: the battery pack is composed of a cylindrical battery cell 21, a square battery cell 21 and a soft package battery cell 21, which are not limited in the embodiment of the present application. However, for the sake of brevity, the following embodiments are described by taking the square battery cell 21 as an example.

Fig. 4 is an exploded schematic view of a battery cell 21 according to some embodiments of the present disclosure. The battery cell 21 refers to the smallest unit constituting the battery 10. As shown in fig. 4, the battery cell 21 includes a cap assembly 40, a case 211, and an electrode assembly 212.

The top cap assembly 40 refers to a member that covers the opening of the case 211 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the cap assembly 40 may be adapted to the shape of the housing 211 to fit the housing 211. Alternatively, the top cap assembly 40 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the top cap assembly 40 is not easily deformed when being impacted, the battery cell 21 may have a higher structural strength, and the safety performance may be improved. Functional parts such as the electrode terminals 40a may be provided on the top cap assembly 40. The electrode terminal 40a may be used to electrically connect with the electrode assembly 212 for outputting or inputting electric energy of the battery cell 21. In some embodiments, a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold value may be further disposed on the cap assembly 40. In some embodiments, an insulator may also be provided on the inside of the cap assembly 40, which may be used to isolate the electrical connection components within the housing 211 from the cap assembly 40 to reduce the risk of short circuits. Illustratively, the insulator may be plastic, rubber, or the like.

The case 211 is an assembly for fitting the cap assembly 40 to form an internal environment of the battery cell 21, wherein the formed internal environment may be used to house the electrode assembly 212, an electrolyte (not shown in the drawings), and other components. The housing 211 and the cap assembly 40 may be separate components, and an opening may be formed in the housing 211, and the cap assembly 40 may cover the opening at the opening to form an internal environment of the battery cell 21. Without limitation, the top cover assembly 40 and the housing 211 may be integrated, and specifically, the top cover assembly 40 and the housing 211 may form a common connection surface before other components are inserted into the housing, and when it is required to seal the inside of the housing 211, the top cover assembly 40 covers the housing 211. The housing 211 may be of various shapes and various sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism shape, and the like. Specifically, the shape of the case 211 may be determined according to the specific shape and size of the electrode assembly 212. The material of the housing 211 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this application.

The electrode assembly 212 is a component in the battery cell 21 where electrochemical reactions occur. One or more electrode assemblies 212 may be contained within the housing 211. The electrode assembly 212 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally disposed between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode tabs having the active material constitute the body portion of the electrode assembly 212, and the portions of the positive and negative electrode tabs having no active material each constitute a tab (not shown in the drawings). The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively. During the charge and discharge of the battery, the positive and negative active materials react with the electrolyte, and the tabs are connected to the electrode terminals 40a to form a current loop.

In some embodiments of the present application, as shown in FIG. 5, and with further reference to FIGS. 6-40. The top cover assembly 40 comprises a base 41 and a valve plate 42, the base 41 is connected to the outer edge of the valve plate 42 in an encircling manner, at least one connecting notch and at least one explosion notch are arranged on the valve plate 42, the connecting notch is connected with the explosion notch and surrounds at least two explosion areas, the thickness of the valve plate 42 at the connecting notch is larger than that of the valve plate 42 at the explosion notch, and the thickness of the valve plate 42 at the connecting notch is smaller than that of the whole valve plate 42.

As shown in fig. 6 to 10, the cover assembly 40 includes a cover plate (not shown) in addition to the base 41 and the valve plate 42. The base 41 may be a part of the top cover plate, or the base 41 is connected to the top cover plate and used for supporting the valve sheet 42. The valve plate 42 can be a sheet formed by stamping a metal sheet, the valve plate 42 is provided with a connecting notch and a blasting notch, the connecting notch and the blasting notch are formed on the surface of the valve plate 42 in a stamping mode, specifically, the connecting notch can be arranged on the single-side surface of the valve plate 42, or simultaneously arranged on the two side surfaces of the valve plate 42, and similarly, the blasting notch can be arranged on the single-side surface of the valve plate 42, or simultaneously arranged on the two side surfaces of the valve plate 42.

The explosion area is an area which can be decompressed when the valve plate 42 is opened, and is formed by connecting and enclosing the connecting nicks and the explosion nicks. The thickness of the base 41 is T1, the overall thickness of the valve plate 42 is T2, the thickness of the valve plate 42 at the connecting notch is T3, and the thickness of the valve plate 42 at the blasting notch is T4. Specifically, the overall thickness dimension of the valve sheet 42 is the thickness dimension of the valve sheet 42 where no notch is provided. The thickness T3 of the valve sheet 42 at the connecting notch is larger than the thickness T4 of the valve sheet 12 at the explosion notch, namely the depth of the explosion notch is larger than the depth of the connecting notch, and the thickness T3 of the valve sheet 12 at the connecting notch is smaller than the whole thickness T2 of the valve sheet 42, so that the valve sheet 42 at the explosion notch is thinnest in the whole thickness direction of the valve sheet 42. The thickness of the valve plate 42 at the connecting notch is between the whole thickness of the valve plate 42 and the thickness of the valve plate 42 at the blasting notch, so that the valve plate 42 at the connecting notch has certain connecting strength and certain flexibility. When the gas pressure in the single battery body reaches the safety pressure relief threshold value of the battery, the valve plate 42 at the explosion notch is broken, the valve plate 42 at the connection notch is still connected with the base 41, the explosion area rotates and bends around the connection notch under the impact of the gas pressure, the impact force of the gas is reduced in the process, and finally after the pressure relief is finished, the explosion area is still connected with the valve plate 41 at the connection notch.

It should be further noted that, in some embodiments of the present application, the horizontal direction in fig. 6 is the thickness direction of the valve sheet 42 and the base 41, that is, the direction perpendicular to the two side surfaces of the valve sheet 42 is the thickness direction of the valve sheet 42 and the base 41.

In the technical scheme of this application, through setting up connection nick and blasting nick, make connection nick and blasting nick link to each other and enclose into two at least blasting regions, wherein at least one blasting region is including connecting the nick, wherein the thickness dimension of the valve block 42 of connection nick department is greater than the thickness dimension of the valve block 42 of blasting nick department, thereby when valve block 42 is opened, the valve block 42 of connection nick department is more difficult for the valve block 42 of blasting nick department to break off, thereby blasting region links to each other with the valve block 42 of connection nick department when valve block 42 is opened, form a plurality of fragments that break away from top cap subassembly 40 when preventing valve block 42 from opening, simultaneously in order to reduce the impact force of the valve block 42 of connection nick department when valve block 42 opens, prevent that the valve block 42 of connection nick department from breaking off, the thickness dimension of the valve block 42 of connection nick department is less than 42's whole thickness dimension, thereby make the valve block 42 of connecting nick department buckle deformation for valve block 42 is whole more easily, and reduce the impact force that the blasting region received effectively at the in-process of buckling deformation, prevent that the valve block 42 of connecting nick department from taking place the fracture, and simultaneously, link to each other and enclose into two at least blasting regions through connecting nick and blasting nick, separate into two at least blasting regions that are relatively little with valve block 42, thereby reduce the blasting region's after separating the impact force, thereby further reduce the impact force that the valve block 42 of connecting nick department bore, and then guarantee blasting region and the reliability of being connected of the valve block 42 of connecting nick department, form a plurality of fragments that break away from top cap assembly 40 when preventing valve block 42 from opening, security and reliability when improving top cap assembly 40 uses.

In some embodiments of the present application, as illustrated in fig. 5 and 11, each burst region is provided with at least one connecting score.

As shown in fig. 5, in some embodiments of the present application, the valve sheet 42 comprises a first burst area 421 and a second burst area 422, wherein the first burst area 421 comprises a first connecting score 431 and the second burst area 422 comprises a second connecting score 432.

When the valve sheet 42 is opened, the first burst area 421 is still connected to the valve sheet 42 at the first connecting notch 431 after being opened by the gas impact force, so that the first burst area 421 is prevented from being separated from the base 41 and forming fragments when the valve sheet 42 is opened. Similarly, the second burst area 422 is still connected to the valve plate 42 at the second connecting notch 432 after being opened by the gas impact, so that the second burst area 422 is prevented from being separated from the base 41 and forming fragments when the valve plate 42 is opened.

As shown in fig. 11, in some embodiments of the present application, the valve panel 42 comprises a first burst region 421, a second burst region 422 and a third burst region 423, wherein the first burst region 421 comprises a first connecting score 431, the second burst region 422 comprises a second connecting score 432 and the third burst region 423 comprises a third connecting score 433.

By arranging the connecting nicks on any one of the blasting areas, when the valve plate 42 is opened, any one of the blasting areas is respectively connected with the valve plate 42 at the corresponding connecting nick, so that the situation that any one of the blasting areas is separated from the top cover assembly 40 and forms fragments when the valve plate 42 is opened is avoided.

In some embodiments of the present application, as shown in fig. 5, the connecting score is a straight segment structure.

Specifically, the connecting nicks and the blasting nicks are integrally encircled to form a runway-shaped structure, and the blasting area is arranged inside the runway-shaped structure. Wherein. The runway type structure comprises two opposite straight line segments and two opposite arc segments, the straight line segments and the arc segments are alternately arranged in sequence and are connected end to end, and the first connecting nick 431 and the second connecting nick 432 are respectively arranged on the straight line segments on two sides and are respectively in a straight line segment structure.

The straight line section structure is easier to bend and deform, such as an arc section, compared with other shapes of structures, so that the impact force applied to the valve plate 42 at the connecting notch is reduced, and the valve plate 42 at the connecting notch is prevented from being broken.

In some embodiments of the present application, as shown in fig. 5, the length of the connecting score is 4mm or greater.

The length direction of the connecting score, i.e., the extending direction of the straight line segment in fig. 5, is the horizontal direction in fig. 5. If in other embodiments of the present application, the connecting notch is a straight line segment and extends along the vertical direction, and the length direction of the connecting notch is the vertical direction.

Such setting can guarantee that the valve block 42 of connecting the nick department has certain joint strength, even still can reliably be connected with blasting region after buckling deformation to prevent to connect the valve block 42 fracture of nick department, and then prevent that valve block 42 from opening the back and forming a plurality of fragments that break away from top cap assembly 40.

In some embodiments of the present application, as shown in fig. 5, the at least one connecting score includes a first connecting score 431 and a second connecting score 432, and the at least one blasting score includes a first blasting score 441, a second blasting score 442 and a third blasting score 443, wherein the first connecting score 431, the first blasting score 441, the second connecting score 432 and the second blasting score 442 are sequentially connected end to end, and both ends of the third blasting score 443 are respectively connected to the first blasting score 441 and the second blasting score 442.

Specifically, the first connection notch 431, the first blasting notch 441, the second connection notch 432 and the second blasting notch 442 are sequentially connected end to end and are enclosed to form a blasting area, and the blasting area is divided into a first blasting area 421 and a second blasting area 421 by arranging a third blasting notch 443, so that when the valve sheet 42 is opened, the first blasting area 421 and the second blasting area 422 are respectively opened along the third blasting notch 443. Wherein, first blasting region 421 is equipped with first connection nick 431, and second blasting region 422 is equipped with second connection nick 432 to first blasting region 421 after opening links to each other with valve block 42 of first connection nick 431 department, and second blasting region 422 after opening links to each other with valve block 42 of second connection nick 432 department.

Through connecting first connection nick 431, first blasting nick 441, second connection nick 432 and second blasting nick 442 end to end in proper order and surround into the blasting region, link to each other the both ends of third blasting nick 443 with first blasting nick 441 and second blasting nick 442 respectively simultaneously, separate into two blasting regions with valve block 42, and two blasting regions all include the connection nick, thereby can reduce the impact that the valve block 42 of the connection nick department in any blasting region bore effectively, prevent that the valve block 42 of connection nick department from breaking, avoid any blasting region to break away from top cap subassembly 40 and form the piece.

In some embodiments of the present application, as shown in fig. 5 and 11, n connection scores and 2n-1 blasting scores are arranged on the valve sheet 42, where n is greater than or equal to 2, n connection scores and 2n-1 blasting scores surround n blasting areas, any blasting area is a closed area surrounded by the connection scores and the blasting scores, and there is only one connection score in any blasting area.

As shown in fig. 5, when n is equal to 2, 2 connecting scores are provided on the valve plate 42, that is, the first connecting score 431 and the second connecting score 432, and 3 blasting scores are further provided on the valve plate 42, that is, the first blasting score 441, the second blasting score 442 and the third blasting score 443, and the first connecting score 431, the second connecting score 432, the first blasting score 441, the second blasting score 442 and the third blasting score 443 surround 2 blasting areas, that is, the first blasting area 421 and the second blasting area 422, wherein the first blasting area 421 is provided with the first connecting score 421, and the second blasting area 422 is provided with the second connecting score 422.

As shown in fig. 11, when n is equal to 3, 3 connecting scores are provided on the valve plate 42, that is, the first connecting score 431, the second connecting score 432 and the third connecting score 433, and 5 blasting scores are further provided on the valve plate 42, that is, the first blasting score 441, the second blasting score 442, the third blasting score 443, the fourth blasting score 444 and the fifth blasting score 445, and 3 blasting regions, that is, the first blasting region 421, the second blasting region 422 and the third blasting region 423, are defined by the 3 connecting scores and the 5 blasting scores, wherein the first blasting region 421 is provided with the first connecting score 431, the second blasting region 422 is provided with the second connecting score 432, and the third blasting region 423 is provided with the third connecting score 433.

In turn, when n equals 4, 4 connecting scores are provided on the valve plate 42, and for the case that n equals 3, one more connecting score may be provided on the straight line segment where the first connecting score 431 is located or the straight line segment where the second connecting score 432 is located, and two blasting scores are correspondingly added, wherein one blasting score is used to connect the adjacent connecting score, and the other blasting score is used to connect the third blasting score 443, or other blasting scores, and form a closed structure. By parity of reasoning, n connecting nicks and 2n-1 blasting nicks can be arranged, so that the valve plate 4 is divided into n blasting areas, and any blasting area is provided with the connecting nick.

Not only be limited to only including two blasting regions on the valve block 42 in this application, in order to further reduce the impact force that any blasting region bore, still can separate into a plurality of blasting regions with the valve block through the setting of connecting nick and blasting nick, any blasting region in a plurality of corresponding blasting regions all includes a connection nick, any blasting region is opened the back under the effect of gas impact force and is linked to each other with the valve block 42 of connecting nick department respectively, and then avoid any blasting region to break away from top cap subassembly 40 and form the piece when valve block 42 is opened.

In some embodiments of the present application, as shown in fig. 5 to 7, the connecting notch is spaced apart from the outer edge of the valve plate 42, and the burst notch is spaced apart from the outer edge of the valve plate 42.

The outer edge of valve plate 42 is the connection between valve plate 42 and base 41. Because the base 41 ring in this application locates the outward flange of valve block 42, through the outward flange interval setting that will connect nick and valve block 42, can avoid locating the junction of valve block 42 and base 41 with connecting the nick to further improve the joint strength of the valve block 42 who connects the nick department. Because the blasting nick links to each other and encloses into the blasting region with connecting the nick, consequently, set up the blasting nick equally to set up to the outward flange interval with valve block 42 to with be connected the nick and be connected in a smooth manner, thereby be convenient for the blasting nick fracture when valve block 42 is opened.

In some embodiments of the present application, as shown in fig. 5, at least one reinforcing score is provided in any one of the burst regions, and both ends of the reinforcing score are connected to the burst scores located at both ends of the connecting score, respectively.

The reinforcing scores may also be formed on the surface of the valve sheet 42 by stamping, thereby improving the deformation resistance of the valve sheet 42. In some embodiments of the present application, the reinforcing score includes a first reinforcing score 451 and a second reinforcing score 452, wherein the first reinforcing score 451 is provided at the first burst area 421 and the second reinforcing score 452 is provided at the second burst area 422. The first reinforcing notch 451 and the second reinforcing notch 452 are similar to circular arc structures, two ends of the circular arc structure of the first reinforcing notch 451 are connected with the first blasting notch 441 and the second blasting notch 442 at two ends of the first connecting notch 431 respectively, the circular arc protrusion of the circular arc structure of the first reinforcing notch 451 is convexly arranged close to the third blasting notch 443, two ends of the circular arc structure of the second reinforcing notch 452 are connected with the first blasting notch 441 and the second blasting notch 442 at two ends of the second connecting notch 432 respectively, and the circular arc protrusion of the circular arc structure of the second reinforcing notch 452 is convexly arranged close to the third blasting notch 443.

Through setting up the enhancement nick, can improve the resistance to deformation ability of valve block 42 to in the transport and the transportation of top cap subassembly 40, can not lead to opening of valve block 42 because of external force oppression, avoid the valve block not having discharge under the condition of battery internal pressure yet, lose the effect promptly. Simultaneously, will strengthen the both ends of nick and link to each other with the blasting nick of being connected the both ends of nick respectively, make and connect the nick and locate in strengthening the region that nick and blasting nick enclose, can not connect the joint strength of nick and cause the influence.

In some embodiments of the present application, as shown in fig. 5 and 6, the overall thickness dimension of the valve sheet 42 is smaller than that of the base 41, and at least one surface of the valve sheet 42 is recessed with respect to the surface of the base 41 on the same side.

Specifically, the overall thickness dimension of the valve sheet 42 is T2, the thickness dimension of the base 41 is T1, and T2 is smaller than T1. Wherein, one side surface of the valve plate 42 is flush with one side surface of the base 41, and the other side surface of the valve plate 42 is recessed relative to the other side surface of the base 41. In other embodiments of the present application, both side surfaces of the valve sheet 42 may be recessed with respect to both side surfaces of the base 41.

Above-mentioned structural design can guarantee the joint strength of other parts on base 41 and the top cap subassembly 40, and valve block 42 breaks or warp for base 41 more easily simultaneously to when the inside gas of needs discharge battery, the blasting nick district of valve block 42 breaks and opens, thereby carries out the pressure release, and the blasting region after opening is fixed in base 41 through the valve block 42 of connecting the nick department.

According to some embodiments of the present application, there is provided a battery cell 21 having the cap assembly 40 of any of the above embodiments.

According to some embodiments of the present application, there is provided a battery 10 having the battery cell 21 of any of the above-described embodiment modes.

According to some embodiments of the present application, there is provided a power consumption apparatus having the battery 10 of any of the above embodiments, and the battery 10 is used for supplying power to a power consumption device.

The electric device can be any one of the aforementioned devices or systems using batteries.

According to some embodiments of the present disclosure, as shown in fig. 5 to 10, the top cover assembly 40 includes a base 41 and a valve plate 42, wherein the valve plate 42 is provided with a first connecting notch 431, a second connecting notch 432, a first blasting notch 441, a second blasting notch 442 and a third blasting notch 443, the first connecting notch 431, the second connecting notch 432, the first blasting notch 441, the second blasting notch 442 and the third blasting notch 443 enclose a blasting area, and the valve plate 42 is divided into a first blasting area 421 and a second blasting area 422 by the third blasting notch 443, the first blasting area 421 is provided with the first connecting notch 431, and the second blasting area 422 is provided with the second connecting notch 432. The thickness of the valve plate 42 at the first connecting notch 431 and the thickness of the valve plate 42 at the second connecting notch 432 are both T3, the whole thickness of the valve plate 42 is T2, the thickness of the valve plate 42 at the first explosion notch 441, the thickness of the valve plate 42 at the second explosion notch 442 and the thickness of the valve plate 42 at the third explosion notch 443 are both T4, wherein T3 is greater than T4, and T3 is less than T2. When the gas pressure in the battery reaches the safety pressure relief threshold value of the battery, the valve plates 42 at the first blasting notch 441, the second blasting notch 442 and the third blasting notch 443 all break, the first blasting area 421 rotates and bends around the first connecting notch 431 under the impact of the gas pressure, the second blasting area 422 rotates and bends around the second connecting notch 432 under the impact of the gas pressure, the impact force of the gas is reduced in the process, and finally after the pressure relief is finished, the first blasting area 421 is connected with the valve plate 42 at the first connecting notch 431, the second blasting area 422 is connected with the valve plate 42 at the second connecting notch 432, and further the first blasting area 421 and the second blasting area 422 are prevented from being separated from the top cover assembly 40 and forming fragments.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present application, and are intended to be covered by the claims and the specification of the present application. In particular, the features mentioned in the embodiments can be combined in any manner, as long as no structural conflict exists. This application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A header assembly, comprising:

a base;

the valve block, the base ring establish connect in the outward flange of valve block, be equipped with at least one connection nick and at least one blasting nick on the valve block, connect the nick with the blasting nick links to each other and encloses into two at least blasting regions, wherein, connect nick department the thickness dimension of valve block is greater than blasting nick department the thickness dimension of valve block, just connect nick department the thickness dimension of valve block is less than the whole thickness dimension of valve block.

2. The cap assembly of claim 1, wherein any one of the burst regions is provided with at least one of the connecting scores.

3. The header assembly of claim 2, wherein the connecting score is a straight segment structure.

4. The header assembly of claim 3, wherein the connecting score has a length of 4mm or greater.

5. The cap assembly of claim 2, wherein the at least one connection score comprises a first connection score and a second connection score, and the at least one explosion score comprises a first explosion score, a second explosion score and a third explosion score, wherein the first connection score, the first explosion score, the second connection score and the second explosion score are sequentially connected end to end, and two ends of the third explosion score are respectively connected with the first explosion score and the second explosion score.

6. The top cover assembly of claim 2, wherein n connecting scores and 2n-1 blasting scores are arranged on the valve plate, wherein n is greater than or equal to 2, n connecting scores and 2n-1 blasting scores surround n blasting areas, any blasting area is a closed area surrounded by the connecting scores and the blasting scores, and only one connecting score is arranged in any blasting area.

7. The header assembly of any one of claims 1-6, wherein the connection score is spaced from an outer edge of the valve flap and the burst score is spaced from an outer edge of the valve flap.

8. The assembly of any one of claims 1 to 6, wherein at least one reinforcing score is provided in each of the burst areas, and both ends of the reinforcing score are connected to the burst scores at both ends of the connecting score, respectively.

9. The cover assembly of any one of claims 1 to 6, wherein the valve plate has an overall thickness dimension less than that of the base, and at least one surface of the valve plate is recessed relative to a surface of the base on the same side.

10. A battery cell having the top cap assembly according to any one of claims 1 to 9.

11. A battery having the battery cell of claim 10.

12. An electrical device, characterized by a battery according to claim 11.