CN217903377U - Switching subassembly, battery monomer, battery and power consumption device - Google Patents

Abstract

The application relates to a switching subassembly, battery monomer, battery and power consumption device, the switching subassembly includes: a current collecting member having a terminal connecting portion, a fusing portion, and a tab connecting portion, the fusing portion being connected between the terminal connecting portion and the tab connecting portion; the insulating protection component is arranged for covering the fusing part and is used for keeping the relative positions of the terminal connecting part and the lug connecting part fixed when the fusing part is fused; the fusing part is provided with a first matching part at least on one surface in the thickness direction, and one of the first matching part and the insulating protection component is at least partially arranged in a protruding mode in the thickness direction and embedded in the other one of the first matching part and the insulating protection component. The battery cell can meet the requirement of electric connection between the electrode assembly and the electrode terminal, and the safety performance of the battery cell can be improved.

Description

Switching subassembly, battery monomer, battery and power consumption device

Technical Field

The application relates to the technical field of batteries, in particular to a switching assembly, a battery monomer, a battery and an electric device.

Background

Batteries are widely used in electronic devices such as mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, and the like.

In the development of battery technology, in addition to improving the performance of the battery, how to ensure the connection safety between the electrode assembly and the electrode terminal of each battery cell of the battery is also an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a switching subassembly, battery monomer, battery and power consumption device, and the switching subassembly can be used for battery monomer to realize the electric connection demand between electrode subassembly and the electrode terminal to can improve the free security performance of battery.

In one aspect, an adapter assembly is provided according to an embodiment of the present application, including: a current collecting member having a terminal connecting portion, a fusing portion, and a tab connecting portion, the fusing portion being connected between the terminal connecting portion and the tab connecting portion; the insulating protection component is arranged for covering the fusing part and is used for keeping the relative positions of the terminal connecting part and the lug connecting part fixed when the fusing part is fused; the fuse part is provided with a first matching part at least on one surface in the thickness direction, and one of the first matching part and the insulating protection component is at least partially arranged in a protruding mode in the thickness direction and embedded in the other.

Among the technical scheme of this application embodiment, switching subassembly includes mass flow part and insulating protective member, and the mass flow part includes terminal connecting portion, fusing portion and utmost point ear connecting portion, and terminal connecting portion can be used for being connected with electrode terminal, and utmost point ear connecting portion can be used for being connected with utmost point ear electricity, and fusing portion connects between terminal connecting portion and utmost point ear connecting portion and fuses when the electric current of the mass flow part of flowing through surpasss and predetermines the threshold value for utmost point ear and electrode terminal disconnection guarantee the free safety of battery. And, insulating protective member cladding fusing portion sets up for when fusing portion fusing, can guarantee to keep terminal connecting portion and utmost point ear connecting portion's relative position fixed, avoid the two overlap joint once more to bring the potential safety hazard to battery monomer. Simultaneously, through being formed with first cooperation portion with fusing part at least on the ascending surface of thickness direction, one in first cooperation portion and the insulating protective member is at least partly along the protruding setting of thickness direction and inlay in another's inside, can improve the sealing performance of being connected the composition surface between fusing part and the insulating protective member, and sealed effect is better, and the battery is safer.

According to an aspect of an embodiment of the present application, the first fitting portion is formed by removing a part of material of the fusion portion in a thickness direction.

By making the first fitting portion formed by removing a part of the material of the fusing portion in the thickness direction, the molding of the first fitting portion is facilitated. In addition, the arrangement does not increase the overcurrent area of the fusing part, and the fusing part is guaranteed to be fused before the terminal connecting part and the lug connecting part when the current flowing through the current collecting part exceeds a preset threshold value.

According to an aspect of an embodiment of the present application, the first mating portion includes a plurality of first embossments, each of the first embossments being recessed from a surface of the fuse portion in a thickness direction toward an inside of the fuse portion, and the insulating protective member is at least partially embedded in each of the first embossments.

Through making first cooperation portion include a plurality of first knurling to make insulating protective member at least part inlay in each first knurling, guarantee that first cooperation portion and insulating protective member realize the multiple spot connection, improve the inseparability ability of the two composition surface, and then improve the sealing performance requirement of being connected between insulating protective member and the fusing.

According to an aspect of an embodiment of the present application, a depth of the first embossing is less than or equal to a thickness dimension of the fusing part in a thickness direction.

Through making the degree of depth of first knurling be less than or equal to the thickness dimension of fuse portion, promptly for first knurling can be the recess form, also can be so that the form of through-hole, and the structure is diversified, can be according to the area demand that flows, connects sealed grade demand and adjusts.

According to an aspect of an embodiment of the present application, a depth of the first embossing is smaller than a thickness dimension of the fusing part formed with the first fitting part at both surfaces in the thickness direction.

When the degree of depth through making first knurling is less than the thickness size of fuse portion, all form first cooperation portion in the ascending both sides of thickness direction of fuse portion, can effectual improvement fuse portion both sides in thickness direction separately and the sealing performance of the composition surface between the insulating protection piece.

According to an aspect of an embodiment of the present application, a depth of the first embossment is less than one-half of a thickness dimension of the fusing part in a thickness direction.

Through the setting, when fusing part both sides on thickness direction all were formed with first cooperation portion, even two first cooperation portions set up on thickness direction relatively, can not run through fusing part, do benefit to the shaping that both sides all were provided with the switching subassembly of first cooperation portion.

According to an aspect of an embodiment of the present application, the orthographic projection shape of the first embossments in the thickness direction is circular, elliptical or polygonal.

Through making first knurling adopt above-mentioned structural shape, can guarantee and be connected the demand between the insulating protective part, optimize the sealed effect between the two contact surface.

According to an aspect of an embodiment of the present application, in a thickness direction, an aperture of the first embossing is reduced stepwise or gradually in a direction from a surface of the fusing part toward an inside of the fusing part.

According to an aspect of an embodiment of the present application, the fuse portion has a first connection region connected to the terminal connection portion, a second connection region connected to the tab connection portion, and a transition connection region connected between the first connection region and the second connection region, wherein a distribution density of the first embossings in the transition connection region is less than a distribution density of the first embossings in the first connection region and a distribution density of the second embossings in the second connection region, respectively.

The distribution density of the first embossments in the transition connection area is respectively smaller than that of the first embossments in the first connection area and that of the second connection area, so that the sealing performance of the insulation protection component and the fusing part on the joint surfaces of the first connection area and the second connection area can be improved.

According to an aspect of the embodiment of the present application, the depth a of the first embossing satisfies a range of 0mm < a ≦ 3mm in the thickness direction.

Through making the degree of depth a of first knurling adopt above-mentioned value range, can enough guarantee with the sealing performance of insulating protective member between the faying surface, can also do benefit to the processing of first knurling simultaneously.

According to an aspect of the embodiment of the present application, the terminal connecting portion is provided with a recess portion recessed in the thickness direction, and a second fitting portion is formed on a bottom wall of the recess portion, the second fitting portion including a plurality of second embossments, each of the second embossments being formed by recessing the bottom wall in an inside of the bottom wall in the thickness direction.

The switching subassembly that this application embodiment provided, through be formed with second cooperation portion on the diapire at the concave part, second cooperation portion includes a plurality of second knurling, can increase the roughness of the diapire of concave part for when terminal connection portion when carrying out laser welding with electrode terminal, reduce laser and be reflected, improve laser energy utilization and rate, guarantee the welding demand.

According to one aspect of the embodiment of the application, the current collecting component is a plate-shaped structural body as a whole, the fusing part is provided with a notch penetrating along the thickness direction, the notch is used for reducing the flow area of at least partial section of the fusing part, and the orthographic projection of the insulating protection component in the thickness direction covers the notch.

According to the switching assembly provided by the embodiment of the application, the whole current collecting component is a plate-shaped structure body, so that the processing and forming are facilitated, and the connection requirements between the current collecting component and an electrode terminal and between the current collecting component and a tab are met. The setting of breach does benefit to the area that reduces the fusing part and corresponds the area that overflows, improves switching subassembly's security performance, and insulating protective parts covers the breach at the orthographic projection of thickness direction for when fusing part takes place in the position of breach, insulating protective parts can guarantee that the relative position of the remaining both sides part of fusing part keeps unchangeable, and then satisfies the fixed demand of relative position who keeps terminal connecting portion and utmost point ear connecting portion when fusing part fuses.

In another aspect, a battery cell according to an embodiment of the present application includes: a housing; an electrode assembly disposed in the case, the electrode assembly including tabs; an end cap assembly disposed to close the opening of the case, the end cap assembly including an electrode terminal; as above, the adapter assembly has a tab connecting portion for connecting a tab and a terminal connecting portion for connecting an electrode terminal.

In another aspect, a battery is provided according to an embodiment of the present application, which includes the battery cell described above.

In another aspect, an electric device is provided according to an embodiment of the present application, which includes the battery as described above.

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 additional 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 illustration of a vehicle according to some embodiments of the present application;

fig. 2 is an exploded view of a battery provided by some embodiments of the present application;

fig. 3 is an exploded view of a battery cell according to some embodiments of the present disclosure;

FIG. 4 is an isometric view of an adapter assembly provided by some embodiments of the present application;

FIG. 5 is a top view of an adapter assembly provided at some times herein;

FIG. 6 isbase:Sub>A sectional view taken along A-A in FIG. 5;

FIG. 7 is a partial cross-sectional view of an adapter assembly according to other embodiments of the present application;

FIG. 8 is a partial cross-sectional view of an adapter assembly provided in accordance with further embodiments of the present application;

fig. 9 is a partial cross-sectional view of a current collecting member of a transition assembly according to still other embodiments of the present application;

fig. 10 is a partial cross-sectional view of a current collecting member of a patching assembly provided in accordance with still other embodiments of the present application;

FIG. 11 is a top view of an adapter assembly according to further embodiments of the present application;

FIG. 12 is an isometric view of an adapter assembly provided in accordance with still other embodiments of the present application;

fig. 13 is a top view of an adapter assembly according to further embodiments of the present application.

The reference numbers in the detailed description are as follows:

1000-a vehicle;

100-a battery; 200-a controller; 300-a motor;

10-a box body; 11-a first part; 12-a second part; 13-a containment space;

20-a battery cell;

21-a housing;

22-an end cap assembly; 221-cover plate; 222-electrode terminals;

23-an electrode assembly; 231-a tab;

24-a transition assembly;

241-a current collecting member;

2411-a terminal connection part; 2411 a-a recess; 2411 b-a second mating portion; 2411 c-second embossing;

2412-a fusing part; 2412 a-a first connection region; 2412 b-a transitional linking area; 2412 c-a second linker region; 2412 d-gap;

2413, forming a tab connection part;

2414-a first mating part; 2414 a-first embossing;

242-insulating shield member;

x-thickness direction.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present application more clearly, and therefore are only used as examples, and the protection 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 understood as having a common meaning 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, merely for convenience of description and simplified description, and 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 therefore 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 this application, the battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, and the embodiment of the present application is not limited thereto. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charge or discharge of battery cells.

The battery monomer comprises an electrode assembly, electrolyte, an end cover assembly and a switching assembly, wherein the electrode assembly comprises a positive pole piece, a negative pole piece and a separator. The battery cell mainly depends on metal ions to move between the positive pole piece and the negative pole piece to work. The positive pole piece comprises a positive current collector and a positive active substance layer, and the positive active substance layer is coated on the surface of the positive current collector; the positive electrode current collector comprises a positive electrode current collecting part and a positive electrode lug connected to the positive electrode current collecting part, wherein the positive electrode current collecting part is coated with a positive electrode active substance layer, and the positive electrode lug is not coated with the positive electrode active substance layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece comprises a negative pole current collector and a negative pole active substance layer, and the negative pole active substance layer is coated on the surface of the negative pole current collector; the negative current collector comprises a negative current collecting part and a negative electrode lug connected to the negative current collecting part, wherein the negative current collecting part is coated with a negative active material layer, and the negative electrode lug is not coated with the negative active material layer. The material of the negative electrode current collector may be copper, the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material may be carbon, silicon, or the like. The material of the spacer may be PP (polypropylene) or PE (polyethylene).

The end cap assembly includes electrode terminals and the adapter assembly is used to electrically connect tabs of the electrode assembly with the electrode terminals. The applicant notices that after the current flowing through the switching assembly exceeds a preset threshold value and is fused, the problem that the connection between the insulating protection component and the current collecting component is unreliable exists, and potential safety hazards are brought to a single battery.

In order to solve the problem that the insulation performance of the switching assembly is poor after the switching assembly is fused, the applicant makes further intensive research and discovers that the insulating protection component of the switching assembly is easy to deform in the transportation or compression process of a battery monomer, so that a joint surface between the switching assembly and a current collecting component is easy to warp to generate a gap, the reliability of connection between the insulating protection component and the current collecting component is influenced, and the tightness of the insulating protection component for wrapping a fusing part is influenced, so that the connection performance and the sealing performance between the insulating protection component and the current collecting component of the switching assembly are poor, the insulating protection component and the fusing part are relatively displaced and even fall off, or after the switching assembly is fused, electrolyte enters the fusing part, the electric connection between a terminal connecting part and a tab connecting part is reestablished, and potential safety hazards are brought to the battery monomer.

Based on the above consideration, in order to solve the problems of poor connection reliability and poor sealing performance of the adaptor assembly, the inventors have conducted extensive research and designed an adaptor assembly, which includes a current collecting part and an insulation protection part, wherein the current collecting part includes a terminal connection part, a fusing part and a tab connection part, the fusing part is connected between the terminal connection part and the tab connection part, and the fusing part is used for fusing when the current flowing through the current collecting part exceeds a preset threshold value; and the insulating protection component is arranged to cover the fusing part and is used for keeping the relative position of the terminal connecting part and the lug connecting part fixed when the fusing part is fused. The fusing part is provided with a first matching part on at least one surface in the thickness direction, and one of the first matching part and the insulating protection component is at least partially arranged in a protruding mode in the thickness direction and is embedded in the other one of the first matching part and the insulating protection component.

In such a junction assembly, the fusing part is connected between the terminal connection part and the tab connection part and fuses when the current flowing through the current collecting member exceeds a preset threshold value, so that the tab is disconnected from the electrode terminal, and the safety of the battery cell is ensured. And the insulating protection component covers the fusing part, so that when the fusing part is fused, the relative position of the terminal connecting part and the lug connecting part can be kept fixed, and the potential safety hazard brought to the single battery by lapping the terminal connecting part and the lug connecting part again is avoided. Simultaneously, through being formed with first cooperation portion with fusing portion at least on one surface of thickness direction, one in first cooperation portion and the insulating protective member is at least partly along thickness direction protrusion setting and inlay in another's inside, can improve the connection compactness of being connected the composition face between fusing portion and the insulating protective member for the battery is safer.

The adapter assembly described in the embodiments of the present application is suitable for a battery cell, a battery, and an electric device using the battery.

The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool and the like. The vehicle can be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range extending vehicle and the like; spacecraft include aircraft, rockets, space shuttles, spacecraft, and the like; the electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric power tools include metal cutting electric power tools, grinding electric power tools, assembly electric power tools, and electric power tools for railways, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. The embodiment of the present application does not specifically limit the above power utilization device.

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 1000 according to some embodiments of the present disclosure. The vehicle 1000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or an extended range automobile, etc. The battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, and for example, the battery 100 may serve as an operation power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to supply power to the motor 300, for example, for starting, navigation, and operational power requirements while the vehicle 1000 is traveling.

In some embodiments of the present application, the battery 100 may be used not only as an operating power source of the vehicle 1000, but also as a driving power source of the vehicle 1000, instead of or in part of fuel or natural gas, to provide driving power for the vehicle 1000.

Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present disclosure. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The case 10 is used to provide a receiving space for the battery cells 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 cover each other, and the first portion 11 and the second portion 12 together define a receiving space 13 for receiving the battery cell 20. The second part 12 may be a hollow structure with one open end, the first part 11 may be a plate-shaped structure, and the first part 11 covers the open side of the second part 12, such that the first part 11 and the second part 12 together define the accommodating space 13. The first portion 11 and the second portion 12 may be both hollow structures with one side open, and the open side of the first portion 11 may cover the open side of the second portion 12. Of course, the case 10 formed by the first and second portions 11 and 12 may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 100, a plurality of battery cells may be provided, and the plurality of battery cells may be connected in series or in parallel or in series-parallel, where in series-parallel refers to that the plurality of battery cells are connected in series or in parallel. The plurality of battery cells may be directly connected in series or in parallel or in series-parallel, and the whole body formed by the plurality of battery cells is accommodated in the case 10. Of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells in series, in parallel, or in series-parallel, and a plurality of battery modules are connected in series, in parallel, or in series-parallel to form a whole and accommodated in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for achieving electrical connection between the plurality of battery cells.

Wherein each battery cell 20 may be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell 20 may be cylindrical, flat, rectangular parallelepiped, or other shape.

Referring to fig. 3, fig. 3 is an exploded schematic view of a battery cell 20 according to some embodiments of the present disclosure. The battery cell 20 refers to the smallest unit constituting the battery. The battery cell 20 includes a case 21, an electrode assembly 23, an end cap assembly 22, and an adaptor assembly 24.

The case 21 is an assembly for mating with the end cap assembly 22 to form an internal environment of the battery cell 20, wherein the formed internal environment may be used to house the electrode assembly 23, electrolyte, and other components. The housing 21 and the end cap assembly 22 may be separate components, and an opening may be formed in the housing 21, and the opening may be covered by the end cap assembly 22 to form the internal environment of the battery cell 20. Without limitation, the end cap assembly 22 and the housing 21 may be integrated, and specifically, the end cap assembly 22 and the housing 21 may form a common connecting surface before other components are inserted into the housing, and when it is required to enclose the inside of the housing 21, the end cap assembly 22 covers the housing 21. The housing 21 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 21 may be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 21 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment.

The end cap assembly 22 refers to a member that covers an opening of the case 21 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap assembly 22 may be adapted to the shape of the housing 21 to fit the housing 21. Alternatively, the end cap assembly 22 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the end cap assembly 22 is not easily deformed when being impacted, and the battery cell 20 may have a higher structural strength, and the safety performance may be improved. Functional components such as electrode terminals 222, a cap plate 221, etc., may be included on the end cap assembly 22. The electrode terminal 222 may be used to electrically connect with the electrode assembly 23 for outputting or inputting electric energy of the battery cell 20. The end cap assembly 22 may be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present invention is not limited thereto. In some embodiments, an insulator 26 may also be provided on the inside of the end cap assembly 22, and the insulator 26 may be used to isolate the electrode assembly 23 within the case 21 from the end cap assembly 22 to reduce the risk of short circuits. Illustratively, the insulator may be plastic, rubber, or the like.

The electrode assembly 23 is a part in which electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 may be contained within the case 21. The electrode assembly 23 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided 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 23, and the portions of the positive and negative electrode tabs having no active material each constitute a tab 231. 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 tab 231 is connected to the electrode terminal 222 to form a current loop.

The adaptor assembly 24 is used for connecting the tabs 231 of the electrode assembly 23 with the electrode terminals 222 of the end cap assembly 22 to form a current loop, and can be fused when the battery cell 20 is disconnected, so that the current flowing through the electrode assembly 23 exceeds a preset threshold value, thereby ensuring the safety of the battery.

Referring to fig. 4-6, fig. 4 is an isometric view of an adapter assembly 24 according to some embodiments of the present disclosure, fig. 5 isbase:Sub>A top view of an adapter assembly 24 according to some embodiments of the present disclosure, and fig. 6 isbase:Sub>A cross-sectional view taken alongbase:Sub>A-base:Sub>A of fig. 5.

The junction module 24 includes a current collecting member 241 and an insulation shielding member 242, the current collecting member 241 has a terminal connection portion 2411, a fusing portion 2412 and a tab connection portion 2413, the fusing portion 2412 is connected between the terminal connection portion 2411 and the tab connection portion 2413, and the fusing portion 2412 is configured to fuse when a current flowing through the current collecting member 241 exceeds a predetermined threshold and/or when a temperature is too high. The insulating shield member 242 is provided to cover the fusion portion 2412, and the insulating shield member 242 is used to maintain the relative positions of the terminal connection portion 2411 and the tab connection portion 2413 fixed when the fusion portion 2412 is fused. The fusing portion 2412 has a first matching portion 2414 formed on at least one surface in the thickness direction X, and one of the first matching portion 2414 and the insulating protection member 242 is at least partially protruded along the thickness direction X and is embedded in the other.

Alternatively, the terminal connection part 2411 may be used to connect with the electrode terminal 222 of the end cap assembly 22, and the tab connection part 2413 may be used to connect with the tab 231 of the electrode assembly 23.

Alternatively, the fusing portion 2412 may be connected between the terminal connection portion 2411 and the tab connection portion 2413, and the fusing portion 2412 may be integrally formed with the terminal connection portion 2411 and the tab connection portion 2413.

Alternatively, the flow area of at least a partial region of the fusing part 2412 may be smaller than the flow area of the terminal connection part 2411 and the flow area of the tab connection part 2413. So that the fusing part 2412 is fused when the current flowing through the current collecting member 241 exceeds a preset threshold range.

Alternatively, the fusing part may be notched on one side in the width direction thereof, notched on both sides in the width direction thereof, or one or more through holes may be provided in a region between both sides in the width direction, so that the flow area of at least a partial region of the fusing part is smaller than the flow area of the terminal connection part 2411 and the flow area of the tab connection part 2413. Alternatively, the width direction of the fusing part is perpendicular to the thickness direction X.

Alternatively, the preset threshold range is not limited to a specific value, and may be set according to the safety level of the battery cell 20 to which the adapter assembly 24 is applied,

optionally, the insulating shield member 242 is disposed over the fuse portion 2412, which may be understood as the fuse portion 2412 is surrounded by the insulating shield member 242, and the fuse portion 2412 may be located inside the insulating shield member 242.

Alternatively, the insulating protection member 242 serves to maintain the relative positions of the terminal connection portion 2411 and the tab connection portion 2413 fixed when the fusing portion 2412 is fused, and it may be understood that, when the current flowing through the current collecting member 241 exceeds a preset threshold value, the fusing portion 2412 is fused to be divided into two parts, one of which is connected to the terminal connection portion 2411 and the other of which is connected to the tab connection portion 2413. Since the two portions of the fusing part 2412 after fusing are located in the insulating protection member 242, even if the fusing part 2412 is fused, the positions of the two portions separately formed in the insulating protection member 242 are kept unchanged, and thus the relative positions of the terminal connection part 2411 and the tab connection part 2413 are kept unchanged.

Alternatively, the first matching portion 2414 formed on at least one surface of the fusing portion 2412 in the thickness direction X may be a protrusion or a depression, and one of the first matching portion 2414 and the insulating protection member 242 is at least partially protruded in the thickness direction X and embedded in the other. The first matching portion 2414 may be at least partially protruded along the thickness direction X and embedded inside the insulating protection member 242, and of course, the insulating protection member 242 may be at least partially protruded along the thickness direction X and embedded inside the first matching portion 2414.

In the adapting assembly 24 provided in the embodiment of the present application, the terminal connection portion 2411 may be used to be connected to the electrode terminal 222, the tab connection portion 2413 may be used to be electrically connected to the tab 231, and the fusing portion 2412 is connected between the terminal connection portion 2411 and the tab connection portion 2413 and is fused when the current flowing through the current collecting member 241 exceeds the preset threshold value, so that the tab 231 is disconnected from the electrode terminal 222, and the safety of the battery cell 20 is ensured. In addition, the insulating protection member 242 covers the fusing part 2412, so that when the fusing part 2412 is fused, the relative positions of the terminal connecting part 2411 and the tab connecting part 2413 can be kept fixed, and the potential safety hazard to the single battery 20 caused by the secondary overlapping of the terminal connecting part 2411 and the tab connecting part can be avoided. Meanwhile, a first matching part 2414 is formed on at least one surface of the fusing part 2412 in the thickness direction X, one of the first matching part 2414 and the insulating protective component 242 is at least partially arranged in a protruding mode in the thickness direction X and is embedded in the other one of the first matching part 2414 and the insulating protective component 242, so that even if the single battery 20 where the adapter assembly 24 is located is pressed or transported, the sealing performance of a connection joint surface between the fusing part 2412 and the insulating protective component 242 can be improved, even if the fusing part 2412 is fused, the sealing performance between the fusing part 2412 and the insulating protective component 242 can be guaranteed, and the phenomenon that the residual part of the fusing part 2412 after being fused is overlapped again due to the fact that foreign matters enter the fusing part 2412 is avoided.

In addition, one of the first matching portion 2414 and the insulating protection member 242 is at least partially arranged in a protruding manner along the thickness direction X and is embedded in the other one, so that the connection strength between the two fused portions 2412 and the insulating protection member 242 can be ensured, the change of the relative position between the fused portions 2412 and the insulating protection member 242 is avoided, the residual portions after the fused portions 2412 are effectively prevented from being overlapped again, and the safety performance of the single battery 20 is improved.

As shown with reference to fig. 4-6, in some alternative implementations, the first mating portion 2414 is formed by removing a portion of material from the fuse portion 2412 in the thickness direction X.

The removal of the partial material may be understood as removing a partial material on the fusion portion 2412 by punching, milling or the like at one side of the fusion portion 2412 in the thickness direction X to form the first fitting portion 2414.

The first fitting portion 2414 may be a groove shape smaller than the thickness of the fusion portion 2412, or may be a hole shape equal to the thickness of the fusion portion 2412.

The adapter assembly 24 provided in the embodiment of the present application facilitates the molding of the first matching portion 2414 by removing a portion of the material from the first matching portion 2414 in the thickness direction X by the fusing portion 2412. In addition, the above arrangement does not increase the flow area of the fusing portion 2412, and ensures that the fusing portion 2412 fuses prior to the terminal connection portion 2411 and the tab connection portion 2413 when the current flowing through the current collecting member 241 exceeds a predetermined threshold value.

In some optional implementations, in the adapter assembly 24 provided in this embodiment of the application, the first matching portion 2414 includes a plurality of first embossments 2414a, each of the first embossments 2414a is recessed from a surface of the fuse portion 2412 in the thickness direction X toward an inside of the fuse portion 2412, and the insulating protection member 242 is at least partially embedded in each of the first embossments 2414 a.

The number of the first embossments 2414a may be set according to the size of the fusion portion 2412, and the first embossments 2414a may be grooves extending in the thickness direction X or holes extending in the thickness direction X.

The insulation shield member 242 has protrusions matching the shape of the first embossings 2414a, and the protrusions of the insulation shield member 242 extend into the first embossings 2414a and are embedded in the first embossings 2414 a.

In the adapter assembly 24 provided in the embodiment of the present application, the first matching portion 2414 includes a plurality of first embossings 2414a, and the insulating protection member 242 is at least partially embedded in each of the first embossings 2414a, so as to ensure that the first matching portion 2414 and the insulating protection member 242 realize multi-point connection, improve the tightness of the joint surface between the first matching portion 2414 and the insulating protection member 242, and further improve the sealing performance requirement of the connection between the insulating protection member 242 and the fusing portion 2412.

In some alternative embodiments, the depth of the first embossing 2414a is less than or equal to the thickness dimension of the fusing part 2412 in the thickness direction X.

Alternatively, the depth of the first embossment 2414a may be equal to the thickness of the fusion portion 2412 along the thickness direction X, that is, the first embossment 2414a may also be disposed through the fusion portion 2412 in the thickness direction X, and the first embossment 2414a may be entirely in the form of a through hole

Referring to fig. 7, fig. 7 is a partial cross-sectional view of an adapter assembly 24 according to further embodiments of the present application.

In some embodiments, the first embossing 2414a may have a depth smaller than the thickness of the fusion portion 2412 in the thickness direction X, that is, the first embossing 2414a is not disposed through the fusion portion 2412 in the thickness direction X, and has a bottom wall in the thickness direction X, and the first embossing 2414a may have a groove form as a whole.

The adapter assembly 24 provided by the embodiment of the application is characterized in that the depth of the first embossing 2414a is smaller than or equal to the thickness of the fusing part 2412, that is, the first embossing 2414a can be in a groove form, and can also be in a through hole form, the structure is diversified, and the connection sealing grade requirement can be selected according to the flow area requirement.

Referring to fig. 8, fig. 8 is a partial cross-sectional view of an adapter assembly 24 according to further embodiments of the present application.

In some alternative embodiments, the first embossing 2414a has a depth smaller than a thickness dimension of the fusing part 2412 in the thickness direction X, and the fusing part 2412 is formed with first fitting parts 2414 on both surfaces in the thickness direction X.

Alternatively, when the depth of the first embossing 2414a is smaller than the thickness dimension of the fusing part 2412 along the thickness direction X, the fusing part 2412 may be formed with first matching parts 2414 on both surfaces in the thickness direction X, and the fusing part 2412 may be disposed oppositely between the two first matching parts 2414 in the thickness direction X, or may be disposed in a staggered manner.

Alternatively, the first matching portions 2414 formed on both sides of the fusing portion 2412 in the thickness direction X may have the same or different depths of the first embossments 2414a in the thickness direction X.

In the adapter assembly 24 according to the embodiment of the present application, when the depth of the first embossing 2414a is smaller than the thickness dimension of the fusing portion 2412, the first matching portions 2414 are formed on both sides of the fusing portion 2412 in the thickness direction X, so that the sealing performance of the joint surface between each of both sides of the fusing portion 2412 in the thickness direction X and the insulating shield member 242 can be effectively improved.

In some alternative embodiments, the depth of the first embossment 2414a in the thickness direction X is less than one-half of the thickness dimension of the fuse portion 2412. That is, the depth of the first embossing 2414a is less than half of the thickness dimension of the fusing part 2412.

Through the above arrangement, when the fusing portion 2412 is formed with the first matching portions 2414 on both sides of the thickness direction X, even if the two first matching portions 2414 are oppositely arranged in the thickness direction X, the fusing portion 2412 may not be penetrated, which is beneficial to the formation of the adapter assembly 24 with the first matching portions 2414 on both sides.

In some alternative embodiments, the adapter assembly 24 provided in the embodiments of the present application has a circular, elliptical or polygonal orthographic shape of the first embossments 2414a along the thickness direction X.

Alternatively, the orthographic shape of the first embossments 2414a in the thickness direction X may be circular.

Alternatively, the orthographic shape of the first embossments 2414a in the thickness direction X may be an ellipse.

Alternatively, the orthographic shape of the first embossment 2414a along the thickness direction X may also be rectangular, pentagonal, hexagonal, or the like.

Alternatively, when the orthographic projection shape of the first embossments 2414a is a polygon in the thickness direction X, it may be a regular polygon, for example, it may be a square, a regular pentagon, a regular hexagon, or the like.

By adopting the above structural shape for the first embossing 2414a, the requirement for connection with the insulating protection member 242 can be ensured, and the sealing effect between the two contact surfaces can be optimized.

Referring to fig. 9 and 10, fig. 9 is a partial sectional view of a current collecting member 241 of a junction module 24 according to still other embodiments of the present application, and fig. 10 is a partial sectional view of a current collecting member 241 of a junction module 24 according to still other embodiments of the present application.

In some alternative embodiments, the adapter assembly 24 provided in the embodiments of the present application has a pore size of the first embossing 2414a that decreases or gradually decreases in a section-by-section manner along the thickness direction X.

Alternatively, the first embossments 2414a are variable cross-sectional structures in the thickness direction X.

As shown in fig. 9, alternatively, the apertures of the first embossments 2414a may be reduced section by section, that is, the first embossments 2414a may be stepped, and a stepped surface may be formed between adjacent sections to limit the portion of the insulating shield member 242 extending into the first embossments 2414a from being separated from the first embossments 2414 a.

As shown in fig. 10, alternatively, the pore size of the first embossing 2414a may be gradually decreased. With the above arrangement, the first embossing 2414a may have a tapered shape, such that the small end faces the portion of the insulating shield member 242 extending into the first embossing 2414a, and the portion of the insulating shield member 242 extending into the first embossing 2414a can be limited from being separated from the first embossing 2414 a.

Through the arrangement, the connection strength between the first embossing 2414a and the insulating protection component 242 can be improved, and the sealing performance of the joint surface of the first embossing 2414a and the insulating protection component is further ensured.

Referring to fig. 11, fig. 11 is a top view of an adapter assembly 24 according to further embodiments of the present application.

In some alternative embodiments, the fuse portion 2412 has a first connection region 2412a, a second connection region 2412c and a transition connection region 2412b, the first connection region 2412a is connected to the terminal connection portion 2411, the second connection region 2412c is connected to the tab connection portion 2413, and the transition connection region 2412b is connected between the first connection region 2412a and the second connection region 2412c, wherein the distribution density of the first embossings 2414a at the transition connection region 2412b is less than the distribution density of the first embossings 2414a at the first connection region 2412a and the distribution density of the second connection region 2412c, respectively.

Alternatively, the first connection region 2412a, the transition region, and the second connection region 2412c may be disposed sequentially. Optionally, the transition region has an open area that is less than the open area of the first connection region 2412a and the open area of the second connection region 2412 c.

Alternatively, the distribution density of the first embossments 2414a at the transition attachment area 2412b is less than the distribution density of the first embossments 2414a at the first attachment area 2412a and the distribution density of the second attachment area 2412c, respectively. It is understood that the number of the first embossments 2414a distributed per unit area in the transitional attachment area 2412b is smaller than the number of the first embossments 2414a distributed per unit area in the first attachment area 2412a and the second attachment area 2412 c.

For example, if the first embossments 2414a are distributed 5 per unit area of the transition connection region 2412b, the first embossments 2414a may be distributed 10 per unit area of the first connection region 2412a and the second connection region 2412c, which is not limited to the above distribution density for better understanding of the present application, and may be specifically set according to the size of the adapter module 24, the connection strength requirement between the current collecting member 241 and the insulation shielding member 242, and the like.

The adapter assembly 24 of the present embodiment is formed by making the distribution density of the first embossments 2414a at the transitional attachment area 2412b less than the distribution density of the first embossments 2414a at the first attachment area 2412a and the distribution density of the second attachment area 2412c, respectively. The sealing performance between the insulating protection member 242 and the fuse portion 2412 at the interface of the first connection region 2412a and the second connection region 2412c can be increased.

Referring to FIGS. 9-11, in some alternative embodiments, the depth a of the first embossment 2414a in the thickness direction X can range from 0mm < a ≦ 3mm.

Alternatively, the depth a of the first embossment 2414a may be any value between 0mm and 3mm, including 3mm.

Alternatively, the depth of the first embossing 2414a may be any of 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm.

The adapter assembly 24 provided by the embodiment of the application can ensure the sealing performance of the joint surface between the adapter assembly and the insulating protection component 242 and is beneficial to processing the first embossing 2414a by enabling the depth a of the first embossing 2414a to adopt the value range.

Referring to fig. 12, fig. 12 is an isometric view of an adapter assembly 24 according to further embodiments of the present application.

In some alternative embodiments, the terminal connecting portion 2411 is provided with a recess 2411a recessed in the thickness direction X, a second mating portion 2411b is formed on a bottom wall of the recess 2411a, the second mating portion 2411b includes a plurality of second embossings 2411c, and each of the second embossings 2411c is formed by recessing the bottom wall in the thickness direction X toward the inside of the bottom wall.

The recess 2411a is used to mate with the electrode terminal 222, and the shape of the recess 2411a may be matched with the shape of the electrode terminal 222 to ensure the electrical connection requirement with the electrode terminal 222.

The orthographic projection shape of each second embossment 2411c in the thickness direction X may be circular, elliptical, or polygonal.

Alternatively, the thickness of the second embossments 2411c may be smaller than the thickness of the bottom wall of the recesses 2411a in the thickness direction X.

In the adapter module 24 provided by the embodiment of the application, the second matching portion 2411b is formed on the bottom wall of the concave portion 2411a, and the second matching portion 2411b comprises the plurality of second embossments 2411c, so that the roughness of the bottom wall of the concave portion 2411a can be increased, when the terminal connecting portion 2411 is subjected to laser welding with the electrode terminal 222, laser is prevented from being reflected, the utilization rate of laser energy is improved, and the welding requirement is ensured.

As shown in fig. 12, as an alternative embodiment, the current collecting member 241 is a plate-shaped structural body as a whole, the fusing portion 2412 is provided with a notch 2412d penetrating in the thickness direction X, the notch 2412d is used for making the flow area of the fusing portion 2412 smaller than the flow area of the terminal connecting portion 2411 and the flow area of the tab connecting portion 2413, and the orthogonal projection of the insulating protection member 242 in the thickness direction X covers the notch 2412d.

Alternatively, the current collecting member 241 may be understood as a plate-shaped structure as a whole, that is, the current collecting member 241 may be substantially a plate-shaped structure, which allows a convex portion or a concave portion to be provided, in most areas of the current collecting member 241.

Alternatively, the gap 2412d may be U-shaped groove-shaped with an opening.

Alternatively, the fusing portion 2412 may be provided with a notch 2412d on one side in the width direction thereof, or provided with notches 2412d on both sides in the width direction thereof.

Alternatively, the flow area of the fusing part 2412, the flow area of the terminal connecting part 2411 and the flow area of the tab connecting part 2413 may be understood as a cross-sectional area of the fusing part 2412, a cross-sectional area of the terminal connecting part 2411 and a cross-sectional area of the tab connecting part 2413 in the arrangement direction of the fusing part 2412, the terminal connecting part 2411 and the tab connecting part 2413.

Alternatively, the arrangement direction of the fusing part 2412, the terminal connecting part 2411 and the tab connecting part 2413 is perpendicular to the thickness direction X.

Alternatively, when the fuse portion 2412 includes the first connection region 2412a, the transition connection region 2412b and the second connection region 2412c, the gap 2412d may be specifically located in the transition connection region 2412b, so that the flow area of the fuse portion 2412 at least at the transition connection region 2412b is smaller than the flow area of the terminal connection region 2411 and the flow area of the tab connection region 2413.

Optionally, the fuse portion 2412 is provided with the notch 2412d at a position inside the insulating shield member 242, and the insulating shield member 242 is provided to surround the fuse portion 2412.

Referring to fig. 13, fig. 13 is a top view of an adapter assembly 24 according to still other embodiments of the present application. It is understood that the gap 2412d is not limited to a U-shaped channel, as shown in FIG. 13, but may also be a closed hole in some embodiments.

In the adapting module 24 provided by the embodiment of the present application, the current collecting part 241 is a plate-shaped structure, which is beneficial to processing and forming, and ensures the connection requirement between the current collecting part and the electrode terminal 222 and between the current collecting part and the tab 231. The setting of breach 2412d is favorable to reducing the area that overflows that fusing portion 2412 corresponds the region, improves adapter assembly 24's security performance, insulating protective component 242 covers breach 2412d at the orthographic projection of thickness direction X for when fusing portion 2412 takes place to fuse in the position of breach 2412d, insulating protective component 242 can guarantee that the relative position of the remaining both sides part of fusing portion 2412 keeps unchangeable, and then satisfies the fixed demand in relative position who keeps terminal connecting portion 2411 and utmost point ear connecting portion 2413 when fusing portion 2412 fuses.

In some alternative embodiments, the terminal connection part 2411, the fusing part 2412, and the tab connection part 2413 may be an integrated structure to secure connection strength therebetween.

Alternatively, the tab connection portion 2413 may be two spaced and parallel plate-shaped units, and the two plate-shaped units are spaced and connected to the fusing portion 2412, respectively. May be an integral sheet structure as long as it can satisfy the connection requirement with the tab 231.

According to some embodiments of the present application, there is also provided a battery cell 20, where the battery cell 20 includes a housing 21, an electrode assembly 23, an end cap assembly 22, and the adapter assembly 24 of any of the above aspects, the electrode assembly 23 is disposed in the housing 21, and the electrode assembly 23 includes tabs 231. The end cap assembly 22 is disposed to close the opening of the housing 21, the end cap assembly 22 includes an electrode terminal 222, a tab connection portion 2413 for connecting with the tab 231, and a terminal connection portion 2411 for connecting with the electrode terminal 222.

According to the battery cell 20 provided by the embodiment of the application, the switching assembly 24 provided by the embodiments is included, so that the sealing performance between the current collecting part 241 and the insulating protection part 242 is good, and the overall safety performance of the battery cell 20 is high.

According to some embodiments of the present application, there is also provided a battery including the battery cell 20 according to any of the above aspects.

According to some embodiments of the present application, there is also provided an electric device, including the battery according to any of the above aspects, and the battery is used for supplying electric energy to the electric device.

The powered device may be any of the aforementioned battery-powered devices or systems.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present 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 (15)

1. A patching assembly, comprising:

a current collecting member having a terminal connecting portion, a fusing portion, and a tab connecting portion, the fusing portion being connected between the terminal connecting portion and the tab connecting portion;

the insulation protection component is arranged to cover the fusing part and is used for keeping the relative position of the terminal connecting part and the lug connecting part fixed when the fusing part is fused;

the fusing part is provided with a first matching part at least on one surface in the thickness direction, and one of the first matching part and the insulating protection component is at least partially arranged in a protruding mode in the thickness direction and embedded in the other one of the first matching part and the insulating protection component.

2. The adapter assembly of claim 1, wherein the first mating portion is formed by removing a portion of material from the fuse portion in the thickness direction.

3. The adapter assembly of claim 1, wherein the first mating portion includes a plurality of first embossments, each of the first embossments being recessed from a surface of the fuse portion in the thickness direction toward an interior of the fuse portion, the insulative shield member being at least partially embedded within each of the first embossments.

4. The adapter assembly of claim 3, wherein a depth of the first embossment, in the thickness direction, is less than or equal to a thickness dimension of the fuse portion.

5. The adapter assembly of claim 4, wherein a depth of the first embossment in the thickness direction is less than a thickness dimension of the fuse portion, the fuse portion being formed with the first mating portion on both of the surfaces in the thickness direction.

6. The adapter assembly of claim 5, wherein a depth of the first embossment is less than one-half of a thickness dimension of the fuse portion.

7. The adapter assembly of claim 3 wherein the orthographic shape of the first embossment is circular, oval or polygonal along the thickness direction.

8. The adapter assembly of claim 3, wherein the first embossed aperture decreases or tapers in a direction from a surface of the fuse portion toward an interior of the fuse portion in the thickness direction.

9. The adapter assembly of claim 3, wherein the fuse portion has a first connection region connected to the terminal connection portion, a second connection region connected to the tab connection portion, and a transition connection region connected between the first connection region and the second connection region, wherein a distribution density of the first embossments in the transition connection region is less than a distribution density of the first embossments in the first connection region and a distribution density of the second embossments in the second connection region, respectively.

10. The adapter assembly of claim 3, wherein the depth a of the first embossment, in the thickness direction, ranges from 0mm < a ≦ 3mm.

11. The adapter assembly according to any one of claims 1 to 10, wherein the terminal connecting portion is provided with a recess recessed in the thickness direction, a bottom wall of the recess is formed with a second fitting portion including a plurality of second embossments, each of the second embossments being formed by the bottom wall being recessed inside the bottom wall in the thickness direction.

12. The adapter assembly according to any one of claims 1 to 10, wherein the current collecting member is a plate-shaped structural body as a whole, the fusing part is provided with a notch penetrating along the thickness direction, the notch is used for reducing the flow area of at least partial sections of the fusing part, and an orthographic projection of the insulating protection member in the thickness direction covers the notch.

13. A battery cell, comprising:

a housing;

an electrode assembly disposed within the case, the electrode assembly including tabs;

an end cap assembly disposed to close the opening of the case, the end cap assembly including an electrode terminal;

the adapter assembly of any of claims 1-12, wherein the tab connection portion is configured to connect to the tab, and the terminal connection portion is configured to connect to the electrode terminal.

14. A battery comprising the cell of claim 13.

15. An electric device comprising the battery of claim 14.

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