Battery cell, battery, and electric apparatus

Abstract

A battery cell (20), a battery (100), and an electric apparatus. The battery cell (20) comprises a casing (401), electrode terminals (403), an electrode assembly (501), current collecting members (601), and protection structures (102), wherein the casing (401) comprises wall portions (402); the electrode terminals (403) are installed on a wall portion (402) in an insulated manner, and the wall portion (402) of the casing (401) on which the electrode terminals (403) are installed is called an end cap (404); the electrode assembly (501) is accommodated in the casing (401), the electrode assembly (501) comprises a main body (510) and tabs (520) extending from the main body (510), and the tabs (520) are formed at the end of the main body (510) close to the end cap (404); current collecting members (601) are at least partially arranged between the end cap (404) and the main body (510), and each current collecting member (601) comprises a terminal connection portion (610) and a tab connection portion (620), the terminal connection portion (610) being used for connecting an electrode terminal (403), and the tab connection portion (620) being used for connecting a tab (520); and the protection structure (102) is arranged between the tab (520) and the tab connection portion (620), so as to isolate at least a partial area of the tab (520) from the tab connection portion (620).

Description

Battery cells, batteries and electrical devices Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell, a battery, and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] In the development of battery technology, the reliability of batteries is an issue that cannot be ignored. Therefore, how to enhance the reliability of batteries is a technical problem that needs to be solved urgently. Technical Solutions

[0004] In view of the problems existing in the background technology, the embodiments of the present application provide a battery cell, a battery and an electrical device, aiming to improve the reliability of the battery.

[0005] In a first aspect, embodiments of the present application provide a battery cell, comprising a housing, electrode terminals, an electrode assembly, a current collecting member, and a protective structure. The housing comprises a wall; the electrode terminals are insulated and mounted on the wall. The wall of the housing to which the electrode terminals are mounted is referred to as an end cap. The electrode assembly is housed within the housing and comprises a main body and a tab extending from the main body. The tab is formed at one end of the main body proximate to the end cap. The current collecting member is at least partially disposed between the end cap and the main body. The current collecting member comprises a terminal connecting portion for connecting to the electrode terminals and a tab connecting portion for connecting to the tab. The protective structure is disposed between the tab and the tab connecting portion to isolate at least a portion of the tab from the tab connecting portion.

[0006] In the above solution, the protective structure is arranged between the pole tab and the pole tab connection part, isolating the edge corner area of ​​the pole tab and the pole tab connection part, reducing the risk of the pole tab being damaged due to contact friction in the edge corner area of ​​the pole tab and the pole tab connection part, and improving the reliability of the battery cell.

[0007] In some embodiments, in the thickness direction of the end cover, the tab connection portion is farther away from the end cover than the terminal connection portion, so that a gap is formed between the tab connection portion and the end cover, and the tab is at least partially accommodated in the gap after being bent.

[0008] In the above solution, in the thickness direction of the end cover, when the space occupied by the tab after bending is certain, the gap between the tab connection part and the end cover is used to accommodate part of the tab, which does not occupy additional internal space of the battery cell, thereby improving the energy density of the battery cell.

[0009] In some embodiments, the tab connection portion includes a first surface facing the end cover and a second surface facing away from the end cover, and a third surface connected to the first surface and the second surface; a gap is formed between the first surface and the end cover, and the tab is welded to the first surface.

[0010] In this solution, at least a portion of the tab is accommodated within the gap formed between the first surface and the end cap, reducing the tab's internal space occupation by the battery cell and facilitating increased energy density. Furthermore, the tab is welded to the first surface, and the tab connector provides support for the tab, reducing the risk of internal short circuits in the battery cell caused by the tab's insertion into the main body.

[0011] In some embodiments, the tab includes a main body connection portion, which is located between the main body and the second surface and is used to connect the main body; a current collecting component connection portion, which is accommodated in the gap and welded to the first surface; and a bending portion, which is used to connect the main body connection portion and the current collecting component connection portion and is bent around the third surface.

[0012] In the above scheme, the above design enables the main body, the main body connection part, the bending part, the current collecting component connection part, and the first surface to be connected in sequence and realize electrical connection. The pole tab is bent as a whole and forms a pole tab space to accommodate the pole tab connection part. The pole tab connection part is located in the bent pole tab space, which reduces the battery cell space occupied by the pole tab connection part and improves the energy density of the battery cell.

[0013] In some embodiments, the protective structure includes a first isolation portion, which is arranged between the current collecting component connection portion and the first surface, and is used to isolate at least part of the current collecting component connection portion from the first surface; a second isolation portion, which is arranged between the main body connection portion and the second surface, and is used to isolate at least part of the main body connection portion from the second surface; a third isolation portion, which is arranged between the bending portion and the third surface, and the two ends of the third isolation portion are respectively connected to the first isolation portion and the second isolation portion, and the third isolation portion is used to isolate the bending portion from the third surface.

[0014] In the above solution, the protective structure can completely separate the edge corner areas formed by the first surface, second surface and third surface of the tab and the tab connection part, reducing the risk of direct contact between the tab and the tab connection part, and effectively protecting the tab.

[0015] In some embodiments, the protective structure is arranged on the electrode ear, wherein the first isolation portion is arranged on the side of the current collecting component connection portion facing the first surface, the second isolation portion is arranged on the side of the main body connection portion facing the second surface, and the third isolation portion is arranged on the side of the bending portion facing the third surface.

[0016] In the above solution, the protective structure is provided on the tab to completely separate the tab from the edge corner of the tab connection, reducing contact friction and protecting the tab from damage. Furthermore, the size of the protective structure can be adjusted according to the size of the tab to accommodate battery cells of different sizes.

[0017] In some embodiments, the protective structure is disposed on the tab connection portion, wherein the first isolation portion is disposed on the first surface, the second isolation portion is disposed on the second surface, and the third isolation portion is disposed on the third surface.

[0018] In the above scheme, the protective structure is arranged at the pole ear connection part, which can cover the edge corner area formed by the first surface, the second surface and the third surface that will come into direct contact with the pole ear, thereby avoiding direct contact between the pole ear and the edge corner area of ​​the pole ear connection part, reducing the risk of direct contact, and achieving the purpose of protecting the pole ear.

[0019] In some embodiments, the current collecting component connection portion is welded to the first surface, and weld print areas are formed on the first surface and the second surface respectively; there is a gap between the first isolation portion and the weld print area of ​​the first surface in the width direction of the end cover.

[0020] In the above solution, there is a distance between the first isolation portion and the weld mark area of ​​the first surface in the width direction of the end cover to avoid the weld mark area and prevent the protective structure from interfering with the weld mark area, resulting in poor welding between the tabs and the tab connecting parts.

[0021] In some embodiments, a projection of the second isolation portion on the second surface covers a weld print area of ​​the second surface.

[0022] In the above solution, the size of the second isolating portion in the width direction of the end cover is sufficient to ensure that the projection of the second isolating portion on the second surface completely covers the weld mark area of ​​the second surface, so that the second isolating portion can block the welding slag that may be generated by welding at the tab connection part, thereby reducing the risk of the welding slag falling into the main body and causing a short circuit in the main body.

[0023] In some embodiments, the thickness of the protective structure is T, satisfying 0.03 mm ≤ T ≤ 0.1 mm.

[0024] In the above solution, when the thickness of the protective structure is less than 0.03mm, the protective structure is too thin and easily cut by the edge corner area of ​​the tab connection, failing to effectively protect the tab. When the thickness of the protective structure is greater than 0.1mm, the protective structure is too thick and will excessively occupy the internal space of the battery cell, reducing the energy density of the battery cell.

[0025] In some embodiments, two ends of the protection structure extend beyond two ends of the tab in the length direction of the end cap.

[0026] In the above solution, the two ends of the protective structure extend beyond the two ends of the tab in the length direction of the end cover, so that the size of the protective structure is sufficient to completely isolate the edge corner area of ​​the tab and the tab connection part, reducing the risk of direct contact between the edge corner area of ​​the tab and the tab connection part, effectively protecting the tab and avoiding damage to the tab.

[0027] In some embodiments, the third surface is an arc-shaped surface, and the bent portion bends around the third surface and is disposed against it.

[0028] In the above scheme, the third surface is an arc-shaped surface, and the edge corner area of ​​the pole tab connection portion forms a smooth transition. When the bent portion abuts against the third surface, the edge corner area of ​​the pole tab connection portion will not cut the pole tab due to contact friction. At the same time, the bent portion abuts against the third surface, and the pole tab connection portion can support the pole tab to prevent the pole tab from being inserted into the main body and causing a short circuit in the electrode assembly.

[0029] In some embodiments, an opening is formed at one end of the shell, and the electrode assembly is accommodated in the shell through the opening; the wall portion provided with the electrode terminal is called an end cover, and the end cover is used to close the opening.

[0030] In the above solution, one end of the housing forms an opening, through which the electrode assembly is housed. The wall portion, also known as the end cap, on which the electrode terminal is located, closes the housing opening, creating a sealed space isolated from the outside world. The housing is formed by multiple walls, and the electrode terminal can be located on any wall to meet different manufacturing requirements.

[0031] In a second aspect, an embodiment of the present application provides a battery, which includes a box and the battery cells mentioned in any of the above embodiments, and the box is used to accommodate the battery cells.

[0032] In a third aspect, an embodiment of the present application provides an electrical device, comprising the battery provided in any one embodiment of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0034] In the attached figure:

[0035] FIG1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0036] FIG2 is a schematic diagram of the exploded structure of a battery provided in an embodiment of the present application;

[0037] FIG3 is a schematic diagram of the exploded structure of a battery cell provided in an embodiment of the present application;

[0038] FIG4 is a schematic structural diagram of a current collecting component provided in an embodiment of the present application;

[0039] FIG5 is a schematic diagram of welding a tab and a current collecting component according to an embodiment of the present application;

[0040] FIG6 is a cross-sectional view of a battery cell along the length direction of an end cap provided in an embodiment of the present application;

[0041] FIG7 is a partial enlarged view of a portion B in the cross-sectional view of the battery cell shown in FIG6 ;

[0042] FIG8 is a cross-sectional view of a battery cell along the width direction of an end cap provided in an embodiment of the present application;

[0043] FIG9 is a partial enlarged view of a portion C in the cross-sectional view of the battery cell shown in FIG8 ;

[0044] FIG10 is a schematic diagram of a protective structure provided in an embodiment of the present application provided at a tab connection portion;

[0045] FIG11 is a schematic structural diagram of another current collecting component provided in an embodiment of the present application.

[0046] Icon: vehicle 1000, battery 100, case 10, upper case 11, lower case 12, controller 200, motor 300, battery cell 20, shell 401, wall 402, electrode terminal 403, end cover 404, opening 405, electrode assembly 501, main body 510, tab 520, current collecting member 601, terminal connection portion 610, tab connection portion 620, first surface 621, second surface 622, third surface 623, gap 101, protective structure 102, first isolation portion 103, second isolation portion 104, third isolation portion 105, main body connection portion 521, current collecting member connection portion 522, bending portion 523, weld stamp area 524, length direction X, width direction Y, thickness direction Z. Modes for Carrying Out the Invention

[0047] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including", "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0049] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0050] In the description of this application, it should be noted that, unless otherwise clearly specified or limited, the terms "install", "connect", "connect", and "attach" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0052] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0053] The term "plurality" used in this application refers to two or more (including two).

[0054] In this application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this.

[0055] The battery referred to in the embodiments of this 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 this application may include a battery module or a battery pack. Batteries generally include a housing that encloses one or more battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0056] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is applied to the surface of the positive electrode collector. The positive electrode collector not coated with the positive active material layer protrudes from the positive electrode collector coated with the positive active material layer, and the positive electrode collector not coated with the positive active material layer serves as the positive electrode tab. For lithium-ion batteries, for example, the positive electrode current collector can be made of aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is applied to the surface of the negative electrode collector. The negative electrode collector not coated with the negative active material layer protrudes from the negative electrode collector coated with the negative active material layer, and the negative electrode collector not coated with the negative active material layer serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material layer can be made of carbon or silicon. To ensure that high current can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The separator can be made of PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly can be a wound structure or a laminated structure, but the embodiments of the present application are not limited to this.

[0057] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0058] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including", "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0059] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0060] In the description of this application, it should be noted that, unless otherwise clearly specified or limited, the terms "install", "connect", "connect", and "attach" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0062] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0063] The term "plurality" used in this application refers to two or more (including two).

[0064] In this application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this.

[0065] The battery referred to in the embodiments of this 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 this application may include a battery module or a battery pack. Batteries generally include a housing that encloses one or more battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0066] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is applied to the surface of the positive electrode collector. The positive electrode collector not coated with the positive active material layer protrudes from the positive electrode collector coated with the positive active material layer, and the positive electrode collector not coated with the positive active material layer serves as the positive electrode tab. For lithium-ion batteries, for example, the positive electrode current collector can be made of aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is applied to the surface of the negative electrode collector. The negative electrode collector not coated with the negative active material layer protrudes from the negative electrode collector coated with the negative active material layer, and the negative electrode collector not coated with the negative active material layer serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material layer can be made of carbon or silicon. To ensure that high current can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The separator can be made of PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly can be a wound structure or a laminated structure, but the embodiments of the present application are not limited to this.

[0067] The battery cell also includes a housing, which includes a wall. Electrode terminals are mounted on the wall and electrically connected to the tabs via a current collecting member. To increase the energy density of the battery cell, the tabs are attached to the side of the current collecting member facing the wall, with a portion of the tab accommodated in the gap between the current collecting member and the wall. However, this approach creates contact friction between the bent portion of the tab and the corner of the current collecting member. Because the tabs are very thin, this contact friction can easily damage the tabs during battery cell production and use, leading to electrical failure.

[0068] In view of this, embodiments of the present application provide a technical solution. A battery cell includes a housing, which includes a wall; an electrode terminal, insulated and mounted on the wall; an electrode assembly, disposed within the housing, which includes a main body and a tab extending from the main body, with the tab formed at one end of the main body near the wall; a current collecting member, which is at least partially disposed between the wall and the main body and includes a terminal connecting portion and a tab connecting portion. The terminal connecting portion is used to connect to the electrode terminal, and the tab connecting portion is used to connect to the tab; and a protective structure, disposed between the tab and the tab connecting portion, isolating at least a portion of the tab from the tab connecting portion. The technical solution provided by embodiments of the present application can reduce contact friction between the tab and the current collecting member, thereby protecting the tab and preventing damage to the tab.

[0069] The battery cells and batteries disclosed in the embodiments of the present application can be used in electrical devices to constitute the power supply system of the electrical devices, which is beneficial to improving the safety of the electrical devices.

[0070] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles. Spacecraft include aircraft, rockets, space shuttles, and spacecraft. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Electric tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0071] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0072] Referring to FIG. 1 , FIG. 1 is a schematic diagram of the structure of a vehicle 1000 disclosed in some embodiments of the present application. A battery 100 is disposed within the vehicle 1000. The battery 100 may be disposed at the bottom, front, or rear of the vehicle 1000. The battery 100 may be used to power the vehicle 1000. For example, the battery 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements of the vehicle 1000 during startup, navigation, and driving.

[0073] In some embodiments of the present application, the battery 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0074] In some embodiments, referring to FIG. 2 , FIG. 2 is a schematic structural diagram of a battery 100 provided in some embodiments of the present application. The battery 100 includes a housing 10 and a battery cell 20. The housing 10 is used to accommodate the battery cell 20. The housing 10 can have various structures. In some embodiments, the housing 10 can include an upper housing 11 and a lower housing 12 , which cover each other and together define a storage space for accommodating the battery cell 20. The lower housing 12 can be a hollow structure with one end open, and the upper housing 11 can be a plate-like structure. The upper housing 11 covers the open side of the lower housing 12, so that the upper housing 11 and the lower housing 12 together define a storage space. The upper housing 11 and the lower housing 12 can also be hollow structures with one end open, with the open side of the upper housing 11 covering the open side of the lower housing 12. Of course, the box body 10 formed by the upper box body 11 and the lower box body 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0075] The battery 100 mentioned in the embodiment of the present application refers to a single physical module including one or more battery cells 20 to provide higher voltage and capacity. For example, the battery 100 mentioned in the present application may include a battery module or a battery pack, etc. There may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. Mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the case 10; of course, it is also possible that the multiple battery cells 20 are first connected in series, in parallel, or in a mixed connection to form a battery 100 in the form of a battery module, and the multiple battery modules are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the case 10. The battery 100 may also include other structures. For example, the battery 100 may also include a busbar component for achieving electrical connection between the multiple battery cells 20.

[0076] Each battery cell 20 can be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be cylindrical, flat, rectangular, or in other shapes.

[0077] 3 , the present application discloses a battery cell 20 . FIG3 is a schematic structural diagram of a battery cell 20 disclosed in some embodiments of the present application. The battery cell 20 includes a housing 401 , electrode terminals 403 , an electrode assembly 501 , a current collecting member 601 , and a protective structure 102 . The shell 401 includes a wall portion 402; the electrode terminal 403 is insulated and installed on the wall portion 402, and the wall portion 402 of the shell 401 on which the electrode terminal 403 is installed is called the end cover 404; the electrode assembly 501 is accommodated in the shell 401, and the electrode assembly 501 includes a main body 510 and a pole ear 520 extending from the main body 510, and the pole ear 520 is formed at one end of the main body 510 close to the end cover 404; the current collecting component 601 is at least partially arranged between the end cover 404 and the main body 510, and the current collecting component 601 includes a terminal connecting portion 610 and a pole ear connecting portion 620, the terminal connecting portion 610 is used to connect the electrode terminal 403, and the pole ear connecting portion 620 is used to connect the pole ear 520; the protective structure 102 is arranged between the pole ear 520 and the pole ear connecting portion 620 to isolate at least a part of the pole ear 520 from the pole ear connecting portion 620.

[0078] The housing 401 is composed of multiple walls 402, which enclose a closed space for accommodating the electrode assembly 501. The closed space can also accommodate electrolyte, such as electrolyte solution. The connection and sealing between the multiple walls 402 can be achieved by welding or other methods.

[0079] The housing 401 can have various shapes, such as a cylinder, a cuboid, etc. The shape of the housing 401 can be determined based on the specific shape of the electrode assembly 501. For example, if the electrode assembly 501 has a cylindrical structure, the housing 401 can be a cylindrical structure; if the electrode assembly 501 has a cuboid structure, the housing 401 can be a cuboid structure. In FIG3 , the housing 401 is illustratively a cuboid structure.

[0080] The shell 401 can be made of various materials. For example, the material of the shell 401 includes but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0081] The electrode terminal 403 can be installed on any wall portion 402. The wall portion 402 on which the electrode terminal 403 is installed in the battery cell 20 is called the end cap 404. The shape of the end cap 404 can be adapted to the shape of the shell 401 to match the shell 401. The material of the end cap 404 can be the same as or different from the material of the shell 401. Optionally, the end cap 404 can be made of a material with a certain hardness and strength (for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.). In this way, the end cap 404 is not easily deformed when squeezed or collided, so that the battery cell 20 can have higher structural strength and improved reliability. When the material of the end cap 404 is a conductive material such as copper or aluminum, an insulating member is provided between the contact surface of the end cap 404 and the electrode terminal 403 to isolate the electrode terminal 403 and the end cap 404 and reduce the risk of short circuit.

[0082] The end cover 404 is connected to the housing 401 by welding, bonding, clamping or other methods.

[0083] The housing 401 may be open at one end or at both ends. In some examples, the housing 401 may be open at one end, with one end cap 404 provided to cover the housing 401. In other examples, the housing 401 may be open at both ends, with two end caps 404 provided to cover the two openings of the housing 401, respectively.

[0084] The main body 510 of the electrode assembly 501 is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The main body 510 can be formed by winding, stacking, or rolling. The tabs 520 of the electrode assembly 501 include a positive tab and a negative tab, hereinafter collectively referred to as tabs 520.

[0085] The electrode assembly 501 is housed in the housing 401 , and the number of the electrode assembly 501 can be one or more. For example, in FIG3 , there are two electrode assemblies 501 housed in the housing 401 .

[0086] The tab 520 extends from the main body 510 and is formed at one end of the main body 510 near the end cap 404 so as to be electrically connected to the electrode terminal 403 for inputting or outputting electrical energy.

[0087] The current collecting member 601 is used to electrically connect the tabs 520 and the electrode terminals 403. Ultrasonic pre-welding can be performed before connecting the tabs 520 and the current collecting member 601 to strengthen the tabs 520 and 520. The terminal connecting portion 610 of the current collecting member 601 and the electrode terminals 403 can be connected by laser welding or ultrasonic welding, and the tab connecting portion 620 and the tab 520 can also be connected by ultrasonic welding or laser welding to ensure a secure connection.

[0088] The current collecting member 601 may be a metal conductor, for example, copper, iron, aluminum, alloy, or the like.

[0089] The material of the terminal connection portion 610 and the material of the tab connection portion 620 in the current collecting member 601 may be the same or different.

[0090] The current collecting member 601 includes a tab connection portion 620 and a terminal connection portion 610 . The terminal connection portion 610 is a boss protruding from the surface of the current collecting member 601 . The boss may be made of a metal conductor to facilitate electrical connection with the electrode terminal 403 .

[0091] The shape of the boss can be a circular boss, a square boss, etc., and the size of the contact area between the boss and the electrode terminal 403 meets the welding connection requirements of the electrode terminal 403.

[0092] The protective structure 102 may be a polyester polymer with good mechanical ductility, flexibility, and heat resistance, such as Mylar film. The protective structure 102 is disposed between the tab 520 and the tab connection portion 620 and may be bonded or heat-fused to either or both of the tab 520 and the tab connection portion 620 to isolate at least a portion of the tab 520 from the edge corner of the tab connection portion 620.

[0093] According to an embodiment of the present application, since the pole tab connection portion 620 is relatively thin, the edges of the edge corner area are sharp, and the single-layer pole tab 520 itself is also very thin, the protective structure 102 is arranged between the pole tab 520 and the pole tab connection portion 620, isolating the pole tab 520 from the edge corner area of ​​the pole tab connection portion 620, reducing the risk of damage to the pole tab 520 caused by contact friction between the pole tab 520 and the edge corner area of ​​the pole tab connection portion 620, and improving the reliability of the battery cell 20.

[0094] In some embodiments, please refer to Figures 4 to 7. In the thickness direction Z of the end cover 404, the tab connection portion 620 is farther away from the end cover 404 than the terminal connection portion 610, so that a gap 101 is formed between the tab connection portion 620 and the end cover 404, and the tab 520 is at least partially accommodated in the gap 101 after being bent.

[0095] In the thickness direction Z of the end cover 404, since the terminal connection part 610 protrudes from the tab connection part 620 and is electrically connected to the electrode terminal 403, a gap 101 is formed between the tab connection part 620 and the end cover 404, and the tab 520 can be at least partially accommodated in the gap 101 after being bent.

[0096] According to an embodiment of the present application, in the thickness direction Z of the end cover 404, when the space occupied by the pole tab 520 after being bent is certain, the gap 101 between the pole tab connecting portion 620 and the end cover 404 is used to accommodate part of the pole tab 520, without occupying additional internal space of the battery cell 20, thereby improving the energy density of the battery cell 20.

[0097] In some embodiments, referring to Figures 4 and 5 , Figure 4 is a schematic diagram of the structure of a current collecting member 601 according to an embodiment of the present application, and Figure 5 is a schematic diagram of the welding of a tab 520 to the current collecting member 601 according to an embodiment of the present application. The tab connection portion 620 includes a first surface 621 facing toward the end cap 404, a second surface 622 facing away from the end cap 404, and a third surface 623 connected to the first and second surfaces 621 and 622. A gap 101 is formed between the first surface 621 and the end cap 404, and the tab 520 is welded to the first surface 621.

[0098] According to the embodiment of the present application, at least a portion of the tab 520 is accommodated in the gap 101 formed between the first surface 621 and the end cap 404, thereby reducing the internal space occupied by the tab 520 in the battery cell 20 and facilitating an increase in the energy density of the battery cell 20. Furthermore, the tab 520 is welded to the first surface 621, and the tab connection portion 620 provides support for the tab 520, thereby reducing the risk of internal short circuits in the battery cell 20 caused by the tab 520 being inserted into the body 510.

[0099] In some embodiments, referring to Figures 8 and 9 , Figure 8 is a cross-sectional view of a battery cell 20 provided in an embodiment of the present application along the width direction Y of the end cap 404, and Figure 9 is a partially enlarged view of the cross-sectional view of the battery cell 20 shown in Figure 8 . The tab 520 includes a main body connection portion 521 , which is located between the main body 510 and the second surface 622 and is used to connect the main body 510 ; a current collecting member connection portion 522 , which is accommodated in the gap 101 and welded to the first surface 621 ; and a bend portion 523 , which is used to connect the main body connection portion 521 and the current collecting member connection portion 522 and is bent around the third surface 623 .

[0100] According to an embodiment of the present application, the above-mentioned design enables the main body 510, the main body connection portion 521, the bending portion 523, the current collecting component connection portion 522, and the first surface 621 to be connected in sequence and realize electrical connection. The pole tab 520 is bent as a whole, and a pole tab space is formed to accommodate the pole tab connection portion 620. The pole tab connection portion 620 is located in the bent pole tab space, which reduces the extra space of the battery cell 20 occupied by the pole tab connection portion 620 and improves the energy density of the battery cell 20.

[0101] In some embodiments, referring to Figures 8 and 9, the protective structure 102 includes a first isolation portion 103, which is arranged between the current collecting component connection portion 522 and the first surface 621, and is used to isolate at least part of the current collecting component connection portion 522 from the first surface 621; a second isolation portion 104, which is arranged between the main body connection portion 521 and the second surface 622, and is used to isolate at least part of the main body connection portion 521 from the second surface 622; a third isolation portion 105, which is arranged between the bending portion 523 and the third surface 623, and the two ends of the third isolation portion 105 are respectively connected to the first isolation portion 103 and the second isolation portion 104, and the third isolation portion 105 is used to isolate the bending portion 523 from the third surface 623.

[0102] According to an embodiment of the present application, the protective structure 102 includes a first isolating portion 103, a second isolating portion 104, and a third isolating portion 105, which are arranged in a one-to-one correspondence with the current collecting component connection portion 522, the main body connection portion 521, and the bending portion 523. The edge corner area formed by the first surface 621, the second surface 622, and the third surface 623 of the pole tab 520 and the pole tab connection portion 620 can be completely separated, thereby reducing the risk of direct contact between the pole tab 520 and the edge corner area of ​​the pole tab connection portion 620, and effectively protecting the pole tab 520.

[0103] In some embodiments, referring to Figures 6-9, the protective structure 102 is arranged on the pole ear 520, wherein the first isolation portion 103 is arranged on the side of the current collecting component connection portion 522 facing the first surface 621, the second isolation portion 104 is arranged on the side of the main body connection portion 521 facing the second surface 622, and the third isolation portion 105 is arranged on the side of the bending portion 523 facing the third surface 623.

[0104] According to an embodiment of the present application, the protective structure 102 is provided on the tab 520 and can be integrated with the tab 520 by bonding or hot-melting, so that the edge corners of the tab 520 and the tab connection portion 620 are completely separated, reducing contact friction, thereby protecting the tab 520 and preventing damage to the tab 520. Furthermore, the size of the protective structure 102 can be adjusted according to the size of the tab 520 to accommodate battery cells 20 of different sizes.

[0105] In some embodiments, referring to Figure 10, Figure 10 is a schematic diagram of the protective structure 102 provided in an embodiment of the present application being arranged on the pole tab connection portion 620, the protective structure 102 being arranged on the pole tab connection portion 620, wherein the first isolation portion 103 is arranged on the first surface 621, the second isolation portion 104 is arranged on the second surface 622, and the third isolation portion 105 is arranged on the third surface 623.

[0106] According to an embodiment of the present application, the protective structure 102 is arranged at the pole tab connection portion 620, and can cover the edge corner area formed by the first surface 621, the second surface 622 and the third surface 623 that will come into direct contact with the pole tab 520, thereby avoiding direct contact between the pole tab 520 and the edge corner area of ​​the pole tab connection portion 620, reducing the risk of direct contact, and achieving the purpose of protecting the pole tab 520.

[0107] In some embodiments, referring to FIG5 , FIG5 is a schematic diagram of welding the electrode tab 520 and the current collecting component 601 provided in an embodiment of the present application, wherein the current collecting component connecting portion 522 is welded to the first surface 621 , and weld print areas 524 are formed on the first surface 621 and the second surface 622 , respectively; there is a gap between the first isolation portion 103 and the weld print area 524 of the first surface 621 in the width direction Y of the end cover 404 .

[0108] The current collecting component connection portion 522 and the pole tab connection portion 620 are generally connected by ultrasonic welding. After the current collecting component connection portion 522 is welded to the pole tab connection portion 620, corresponding weld print areas 524 will be formed on the first surface 621 and the second surface 622. The shape of the weld print area 524 is different depending on the welding method. For example, in the embodiment of the present application, the current collecting component connection portion 522 is welded to the pole tab connection portion 620 by ultrasonic welding, and the weld print area 524 formed therefrom is arranged in a point array. The specific shape of the weld print area 524 formed can be a rectangle, a trapezoid, etc.

[0109] The distance between the first isolation portion 103 and the weld print area 524 of the first surface 621 in the width direction Y of the end cover 404 meets the distance requirement for welding the current collecting member connection portion 522 to the tab connection portion 620 .

[0110] According to an embodiment of the present application, there is a distance between the first isolation portion 103 and the weld print area 524 of the first surface 621 in the width direction Y of the end cover 404 to avoid the weld print area 524 and prevent the protective structure 102 from interfering with the weld print area 524, resulting in poor welding between the tab 520 and the tab connecting portion 620.

[0111] In some embodiments, the projection of the second isolation portion 104 on the second surface 622 covers the weld print area 524 of the second surface 622 .

[0112] According to an embodiment of the present application, the size of the second isolation portion 104 in the width direction Y of the end cover 404 is sufficient to ensure that the projection of the second isolation portion 104 on the second surface 622 completely covers the weld print area 524 of the second surface 622, so that the second isolation portion 104 can block the welding slag that may be generated by welding of the tab connection portion 620, thereby reducing the risk of the welding slag falling into the main body 510 and causing a short circuit in the main body 510.

[0113] In some embodiments, the thickness of the protective structure 102 is T, which satisfies 0.03 mm ≤ T ≤ 0.1 mm.

[0114] According to an embodiment of the present application, when the thickness of the protective structure 102 is less than 0.03 mm, the protective structure 102 is too thin and easily cut by the edge corner area of ​​the tab connection portion 620, failing to effectively protect the tab 520. When the thickness of the protective structure 102 is greater than 0.1 mm, the protective structure 102 is too thick and will excessively occupy the internal space of the battery cell 20, reducing the energy density of the battery cell 20.

[0115] In some embodiments, referring to FIG. 5 , both ends of the protection structure 102 extend beyond both ends of the tab 520 in the length direction X of the end cap 404 .

[0116] According to an embodiment of the present application, the two ends of the protective structure 102 extend beyond the two ends of the pole lug 520 in the length direction X of the end cover 404, so that the size of the protective structure 102 is sufficient to completely isolate the pole lug 520 from the edge corner area of ​​the pole lug connecting portion 620, thereby reducing the risk of direct contact between the pole lug 520 and the edge corner area of ​​the pole lug connecting portion 620, effectively protecting the pole lug 520, and avoiding damage to the pole lug 520.

[0117] In some embodiments, referring to Figure 11, which is a schematic structural diagram of another current collecting member 601 provided in an embodiment of the present application, the third surface 623 is an arcuate surface, and the bent portion 523 is bent around and abuts against the third surface 623.

[0118] According to an embodiment of the present application, the third surface 623 is an arc-shaped surface, and the edge corner area of ​​the pole tab connection portion 620 forms a smooth transition. When the bending portion 523 abuts against the third surface 623, the edge corner area of ​​the pole tab connection portion 620 will not cut the pole tab 520 due to contact friction. At the same time, the bending portion 523 abuts against the third surface 623, and the pole tab connection portion 620 can support the pole tab 520 to prevent the pole tab 520 from being inserted into the main body 510 and causing a short circuit in the electrode assembly 501.

[0119] In some embodiments, an opening 405 is formed at one end of the shell 401 , and the electrode assembly 501 is accommodated in the shell 401 through the opening 405 ; the wall portion 402 provided with the electrode terminal 403 is called an end cap 404 , which is used to close the opening 405 .

[0120] According to the embodiment of the present application, an opening 405 is formed at one end of the housing 401. The electrode assembly 501 is accommodated in the housing 401 through the opening 405. The wall portion 402 provided with the electrode terminal 403 is also called an end cap 404. The end cap 404 is used to seal the opening 405 of the housing 401, thereby forming a sealed space in the housing 401 that is isolated from the outside world. The housing 401 is formed by enclosing multiple walls 402. The electrode terminal 403 can be installed in any wall 402 to meet different manufacturing requirements.

[0121] According to some embodiments proposed in this application, a battery 100 is further proposed. The battery 100 includes a housing 10 and the battery cells 20 mentioned in any of the above embodiments. The housing 10 is used to accommodate the battery cells 20 .

[0122] According to some embodiments of the present application, an electrical device is also provided, comprising the battery 100 described in the above embodiments, and configured to provide electrical energy to the electrical device. The electrical device may include, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, a power tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. The spacecraft may include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0123] According to some embodiments of the present application, a battery cell 20 is provided. The battery cell 20 includes a housing 401, an electrode terminal 403, an electrode assembly 501, a current collecting member 601, and a protective structure 102. The housing 401 includes a wall 402, and the electrode terminal 403 is insulated and mounted on the wall 402. The wall 402 of the battery cell 20 on which the electrode terminal 403 is mounted is also called an end cap 404. The electrode assembly 501 is disposed within the housing 401. The electrode assembly 501 includes a main body 510 and a tab 520 extending from the main body 510. The tab 520 is formed at one end of the main body 510 near the end cap 404. The tab 520 includes a main body connecting portion 521, a current collecting member connecting portion 522, and a bent portion 523. The current collecting member connection portion 522 is at least partially disposed between the end cap 404 and the main body 510. The current collecting member 601 includes a terminal connection portion 610 and a tab connection portion 620. The tab connection portion 620 includes a first surface 621 facing the end cap 404, a second surface 622 facing away from the end cap 404, and a third surface 623 connected to the first surface 621 and the second surface 622. In the thickness direction Z of the end cap 404, a gap 101 is formed between the first surface 621 and the end cap 404. The tab 520 is at least partially accommodated in the gap 101 after being bent. The current collecting member connection portion 522 is welded to the first surface 621. The protective structure 102 is arranged between the pole tab 520 and the pole tab connection part 620. The protective structure 102 includes a first isolating part 103, a second isolating part 104, and a third isolating part 105. The first isolating part 103 is arranged between the current collecting component connection part 522 and the first surface 621, the second isolating part 104 is arranged between the main body connection part 521 and the second surface 622, and the third isolating part 105 is arranged between the bending part 523 and the third surface 623. The protective structure 102 can isolate the edge corner area formed by the first surface 621, the second surface 622 and the third surface 623 of the pole tab connection part 620, avoid direct contact between the pole tab 520 and the edge corner area of ​​the pole tab connection part 620, protect the pole tab 520, reduce the risk of damage to the pole tab 520, and improve the reliability of the battery 100.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still make equivalent substitutions for the technical solutions described in the aforementioned embodiments. However, these modifications or substitutions do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A battery cell, characterized in that, Comprising: A housing, including a wall portion; An electrode terminal, insulatingly mounted on the wall portion; An electrode assembly, accommodated in the housing, the electrode assembly including a main body and a tab extending from the main body, the tab being formed at one end of the main body close to the wall portion; A current collecting member, at least part of the current collecting member being disposed between the wall portion and the main body, the current collecting member including a terminal connection portion and a tab connection portion, the terminal connection portion being used for connecting the electrode terminal, and the tab connection portion being used for connecting the tab; A protection structure, the protection structure being disposed between the tab and the tab connection portion to isolate at least part of the area of the tab from the tab connection portion.

2. The battery cell according to claim 1, characterized in that, In the thickness direction of the wall portion, the tab connection portion is farther from the wall portion than the terminal connection portion, so as to form a gap between the tab connection portion and the wall portion, and at least part of the tab is accommodated in the gap after being bent.

3. The battery cell according to claim 2, characterized in that, The tab connection portion includes a first surface facing the wall portion and a second surface facing away from the wall portion which are oppositely disposed, and a third surface connecting the first surface and the second surface; The gap is formed between the first surface and the wall portion, and the tab is welded to the first surface.

4. The battery cell according to claim 3, wherein The tab includes: A main body connection portion, the main body connection portion being located between the main body and the second surface and being used for connecting the main body; A current collecting member connection portion, the current collecting member connection portion being accommodated in the gap and welded to the first surface; A bending portion, the bending portion being used for connecting the main body connection portion and the current collecting member connection portion and being bent around the third surface.

5. The battery cell according to claim 4, wherein The protection structure includes: a first isolation portion, the first isolation portion being disposed between the current collecting member connection portion and the first surface and being used for isolating at least part of the current collecting member connection portion from the first surface; A second isolation portion, the second isolation portion being disposed between the main body connection portion and the second surface and being used for isolating at least part of the main body connection portion from the second surface; A third isolation portion, the third isolation portion being disposed between the bending portion and the third surface, and two ends of the third isolation portion being respectively connected to the first isolation portion and the second isolation portion, the third isolation portion being used for isolating the bending portion from the third surface.

6. The battery cell according to claim 5, wherein The protection structure is disposed on the tab, wherein the first isolation portion is disposed on one side of the current collecting member connection portion facing the first surface, the second isolation portion is disposed on one side of the main body connection portion facing the second surface, and the third isolation portion is disposed on one side of the bending portion facing the third surface.

7. The battery cell according to claim 5, characterized in that, The protection structure is disposed on the tab connection portion, wherein the first isolation portion is disposed on the first surface, the second isolation portion is disposed on the second surface, and the third isolation portion is disposed on the third surface.

8. The battery cell according to claim 5, characterized in that, The current collecting member connection portion is welded to the first surface, and welding mark regions are respectively formed on the first surface and the second surface; There is a spacing between the first isolation portion and the welding mark region of the first surface in the width direction of the wall portion.

9. The battery cell according to claim 8, wherein The projection of the second isolation part on the second surface covers the solder printing area of the second surface.

10. The battery cell according to claim 1, characterized in that, The thickness of the protection structure is T, satisfying 0.03 mm ≤ T ≤ 0.1 mm.

11. The battery cell according to claim 1, characterized in that, Both ends of the protection structure extend beyond both ends of the tab in the length direction of the wall part.

12. The battery cell according to claim 4, wherein, The third surface is an arc surface, and the bending part bends around the third surface and is arranged in abutment.

13. The battery cell according to claim 1, characterized in that, One end of the housing is formed with an opening, and the electrode assembly is accommodated in the housing through the opening; An end cap that closes the opening; Wherein, the end cap is the wall part.

14. A battery, characterized in that, Comprising: The battery cell according to any one of claims 1-13, and; A box body for accommodating the battery cell.

15. An electrical device, characterized in that, Including the battery according to claim 14 for providing electric energy.

Images