Battery cell, battery, electrical equipment, and method and equipment for manufacturing battery cells

Abstract

The present disclosure provides a battery cell, a battery, electrical equipment, and a manufacturing method and manufacturing equipment for a battery cell, which belong to the battery technical field. The battery cell includes an electrode assembly, a housing, and an end cover. The electrode assembly has a first tab. The housing has an opening and a first position limiting portion, and is configured to accommodate the electrode assembly. The end cover includes a cover body configured to close the opening. In the thickness direction of the end cover, the cover body is located on the side of the first position limiting portion away from the electrode assembly, and the first position limiting portion limits movement of the cover body relative to the housing in a direction toward the electrode assembly. The end cover further has a first protrusion protruding from the inner surface of the cover body toward the electrode assembly. The first protrusion is configured to be located beyond the first position limiting portion in the direction away from the cover body so that the first protrusion abuts against the first tab. This ensures good contact between the first protrusion and the first tab, reduces the risk of the first tab being restricted by the first position restricting portion and therefore unable to come into contact with the end cover, and ensures battery performance.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and specifically relates to battery cells, batteries, electrical equipment, and manufacturing methods and equipment for battery cells.

Background Art

[0002] Batteries are widely applied to electronic equipment such as mobile phones, notebook computers, electric vehicles, electric cars, electric airplanes, electric boats, electric vehicle toys, electric boat toys, electric airplane toys, and electric tools.

[0003] A battery cell generally includes a housing, an electrode assembly, and an end cover. The electrode assembly is accommodated in the housing, and the end cover is covered to cover an opening at one end of the housing and is electrically connected to a tab to function as an output electrode of the battery cell. A general battery cell is restricted by the structure of the housing, and there may be a case where the end cover and the tab cannot be in contact or the contact is poor, which affects the normal use of the battery cell.

Summary of the Invention

[0004] Embodiments of this application provide a battery cell, a battery, electrical equipment, and a manufacturing method and equipment for a battery cell that can ensure good contact between an end cover and a tab in the battery cell.

[0005] In the first aspect, an embodiment of the present application provides a battery cell. The battery cell includes an electrode assembly, a housing, and an end cover. The electrode assembly includes a first tab. The housing has an opening and a first position limiting portion, and is configured to accommodate the electrode assembly. The end cover includes a cover body, and the cover body is configured to close the opening. In the thickness direction of the end cover, the cover body is located on the side away from the electrode assembly of the first position limiting portion. The first position limiting portion restricts the movement of the cover body along the direction towards the electrode assembly with respect to the housing. The end cover further has a first convex portion protruding from the inner surface of the cover body towards the electrode assembly. The first convex portion is configured to be provided beyond the first position limiting portion in the direction away from the cover body such that the first convex portion abuts against the first tab.

[0006] In the above technical solution, the first convex portion of the end cover is provided to extend beyond the first position limiting portion in the direction away from the cover body and protrudes to abut against the first tab. Thereby, good contact between the first convex portion and the first tab is ensured, the current passing area between the first tab and the end cover is increased, the risk that the first tab cannot contact the end cover due to being restricted by the first position limiting portion of the housing is reduced, and the performance of the battery can be guaranteed.

[0007] In some embodiments, in the thickness direction, the first convex portion has a contact plane that abuts against the first tab, and the contact plane is provided to be closer to the electrode assembly than the entire first position limiting portion.

[0008] In the above technical solution, the contact plane of the first convex portion abuts against the first tab, the contact area between the first tab and the first convex portion is increased, and thus the current passing area between the first tab and the end cover is increased. The contact plane is provided to be closer to the electrode assembly than the entire first position limiting portion such that the first convex portion extends beyond the first position limiting portion in the direction away from the cover body.

[0009] In some embodiments, the battery cell further includes a first insulating member configured to separate the cover body and the housing so as to achieve an insulating connection between the cover body and the housing.

[0010] In the above technical solution, the first insulating member separates the cover body and the housing so as to maintain insulation therebetween.

[0011] In some embodiments, the first insulating member includes an insulating portion and a pressing portion. The insulating portion is configured to separate the cover body and the housing, and the pressing portion is connected to the insulating portion and configured to abut against the first tab.

[0012] In the above technical solution, the first insulating member includes an insulating portion and a pressing portion connected to the insulating portion. The insulating portion is configured to separate the cover body and the housing so as to achieve an insulating connection therebetween. By abutting the pressing portion against the first tab and restricting the first tab, the risk of short circuit between the positive and negative electrodes caused by the first tab bouncing up and contacting the first position limiting portion is reduced. That is, the first insulating member realizes insulation between the cover body and the housing and plays a role in restricting the first tab.

[0013] In some embodiments, in the thickness direction, the pressing portion extends in a direction from the insulating portion toward the tab so as to abut against the first tab.

[0014] In the above technical solution, in the thickness direction of the end cover, the pressing portion extends in a direction from the insulating portion toward the tab, whereby the pressing effect of the pressing portion on the first tab is better and the first tab is less likely to bounce up.

[0015] In some embodiments, the pressing portion is located on the outer peripheral side of the first convex portion, the first position limiting portion is located on the outer peripheral side of the pressing portion, and the pressing portion is configured to separate the first convex portion and the first position limiting portion.

[0016] In the above technical solution, since the pressing portion is located on the outer peripheral side of the first convex portion and the first position limiting portion is located on the outer peripheral side of the pressing portion, that is, the pressing portion is located between the first convex portion and the first position limiting portion, the pressing portion can play a role in separating the first convex portion and the first position limiting portion, and the risk of contact between the first convex portion and the first position limiting portion can be reduced.

[0017] In some embodiments, the pressing portion has an annular structure.

[0018] In the above technical solution, since the pressing portion has an annular structure, the first tab can be pressed over the entire circumference, and a better limiting role for the first tab can be achieved.

[0019] In some embodiments, the cover body is hermetically connected to the housing via the first insulating member.

[0020] In the above technical solution, the cover body is hermetically connected to the housing via the first insulating member, and the first insulating member plays a role of insulation and also plays a role of sealing between the cover body and the housing.

[0021] In some embodiments, the housing further has a second position limiting portion. In the thickness direction, the cover body is located on the side facing the electrode assembly of the second position limiting portion, and both the second position limiting portion and the first position limiting portion limit the movement of the cover body in the thickness direction with respect to the housing.

[0022] In the above technical solution, both the second position limiting part and the first position limiting part of the housing limit the cover body, and cooperate to limit the movement of the cover body in the thickness direction with respect to the housing. The first position limiting part limits the movement of the cover body along the direction towards the electrode assembly with respect to the housing, and the second position limiting part limits the movement of the cover body along the direction away from the electrode assembly with respect to the housing.

[0023] In some embodiments, the second position limiting part is a bending structure formed by bending a part of the housing inward to the position of the opening.

[0024] In the above technical solution, the second position limiting part is a bending structure formed by bending a part of the housing inward to the position of the opening. That is, according to the method of bending the housing, the second position limiting part can be formed at the position of the opening of the housing, and the forming is simple.

[0025] In some embodiments, the end cover further has a second convex part protruding from the outer surface of the cover body in a direction away from the electrode assembly, and the outer surface of the second convex part is aligned with the outer surface of the second position limiting part.

[0026] In the above technical solution, the outer surface of the second convex part is aligned with the outer surface of the second position limiting part, which contributes to the connection between the second convex part and the bus bar member, and ensures that the second convex part and the bus bar member have a relatively large contact area after connection, contributing to the passage of electric current.

[0027] In some embodiments, the first convex part is welded to the first tab.

[0028] In the above technical solution, since the first convex part is welded to the first tab, the first convex part always has good contact with the first tab. The method of connecting the first convex part and the first tab by welding is simple to implement.

[0029] In a second aspect, an embodiment of the present application provides a battery. This battery includes a battery cell according to any one of the embodiments of the first aspect and a housing for housing the battery cell.

[0030] In a third aspect, an embodiment of the present application provides an electrical equipment. This electrical equipment includes a battery according to any one of the embodiments of the second aspect.

[0031] In a fourth aspect, an embodiment of the present application provides a method for manufacturing a battery cell. The method for manufacturing a battery cell includes the steps of providing an electrode assembly including a first tab, providing a housing having an opening and a first position limiting portion, providing an end cover, housing the electrode assembly in the housing, and covering the end cover to cover the opening. The end cover includes a cover body configured to close the opening. In the thickness direction of the end cover, the cover body is located on the side away from the electrode assembly of the first position limiting portion. The first position limiting portion limits the movement of the cover body along the direction towards the electrode assembly with respect to the housing. The end cover further has a first convex portion protruding from the inner surface of the cover body towards the electrode assembly. The first convex portion is configured to be provided beyond the first position limiting portion in the direction away from the cover body such that the first convex portion abuts against the first tab.

[0032] In the fifth aspect, the embodiment of the present application provides a manufacturing facility for battery cells. The manufacturing facility for battery cells includes a first providing device that provides an electrode assembly including a first tab, a second providing device that provides a housing having an opening and a first position limiting portion, a third providing device that provides an end cover, and an assembling device that houses the electrode assembly in the housing and covers the end cover so as to cover the opening. The end cover includes a cover body, the cover body is configured to close the opening, in the thickness direction of the end cover, the cover body is located on the side away from the electrode assembly of the first position limiting portion, the first position limiting portion limits the movement of the cover body along the direction towards the electrode assembly with respect to the housing, the end cover further has a first convex portion protruding in the direction from the inner surface of the cover body towards the electrode assembly, and the first convex portion is configured to be provided beyond the first position limiting portion in the direction away from the cover body so that the first convex portion abuts against the first tab.

Brief Description of the Drawings

[0033] To more clearly explain the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly described below. The drawings only show some embodiments of the present application and do not limit the scope. A person skilled in the art can also obtain other related drawings based on these drawings without using inventive capabilities.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, hereinafter, with reference to the drawings showing the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly described. The described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without using inventive capabilities also fall within the protection scope of the present application.

[0035] Unless otherwise specified, all technical terms and scientific terms used in the present application have the meanings commonly understood by those skilled in the art. The terms used in the specification of the present application are only for explaining specific embodiments and do not limit the present application. The terms "including", "having", and any variations thereof in the description of the specification, claims, and the above drawings of the present application mean non-exclusive inclusion. The terms "first", "second", etc. in the specification, claims, or drawings of the present application are only for distinguishing different elements and do not define a specific order or primary and secondary.

[0036] When the present application describes "embodiment", it means that the specific features, configurations, or characteristics described using the embodiment are included in at least one embodiment of the present application. When this term is used in each part of the specification, it does not necessarily refer to the same embodiment, nor is it an independent or selectable embodiment that excludes other embodiments.

[0037] In the description of this application, unless there are clear definitions or limitations, the terms "mounting", "associating", "connecting", and "attaching" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a direct connection, an indirect connection through an intermediate object, or the interiors of two elements may communicate with each other. A person skilled in the art can understand the specific meanings of the above terms in this application according to the specific situation.

[0038] In the embodiments of this application, the same symbols indicate the same components. And for the sake of simplicity, in different embodiments, the detailed descriptions of the same components are omitted. The dimensions such as the thickness and length of various components in the embodiments of this application shown in the drawings, as well as the dimensions such as the thickness and length of the entire integrated device, are only for illustrative purposes and do not limit this application.

[0039] "A plurality" described in this application refers to two or more (including two).

[0040] In this application, the battery cell includes, for example, a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., and is not limited thereto in the embodiments of this application. The battery cell has a cylindrical shape, a laminate shape, a square shape, or other shapes, and is not limited thereto in the embodiments of this application. The battery cell is generally divided into three types: a cylindrical battery cell, a square battery cell, and a soft-pack battery cell according to the packaging method, and is not limited thereto in the embodiments of this application.

[0041] The battery described in the embodiments of this application refers to a single physical module including one or more battery cells to provide a higher voltage and capacity. For example, the battery described in this application includes a battery module or a battery pack, etc. The battery generally includes a housing for packaging one or more battery cells. The housing can prevent the charge and discharge of the battery cells from being affected by liquid or other foreign substances.

[0042] The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode plate, a negative electrode plate, and a separator. The battery cell mainly functions by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the uncoated positive electrode current collector of the positive electrode active material layer protrudes with respect to the positive electrode current collector coated with the positive electrode active material layer, and the uncoated positive electrode current collector of the positive electrode active material layer is used as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector is aluminum, and the positive electrode active material is lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, the uncoated negative electrode current collector of the negative electrode active material layer protrudes with respect to the negative electrode current collector coated with the negative electrode active material layer, and the uncoated negative electrode current collector of the negative electrode active material layer is used as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon-based or silicon-based, etc. In order to ensure that it does not melt when a large current flows, the positive electrode tab is a stack of multiple ones, and the negative electrode tab is a stack of multiple ones. The material of the separator is PP (polypropylene) or PE (polyethylene), etc. Also, the electrode assembly may have a wound structure or a laminated structure, and the embodiments of the present application are not limited thereto.

[0043] In a general battery cell, the end cover is electrically connected to the tab and functions as the output electrode (positive output electrode or negative output electrode) of the battery cell. However, after actual assembly, it is easy to occur that the end cover and the tab cannot be in good contact, and the battery cell cannot be used normally. In a battery cell, generally, the housing has a position limiting portion, and the position limiting portion functions to limit the end cover so as to limit the movement of the end cover in the direction towards the electrode assembly. In this case, the tab may also be limited by the position limiting portion. Therefore, it has been found by the inventor that the end cover and the tab cannot be in normal contact or the contact is poor, and the battery cell cannot be used normally.

[0044] In view of this situation, in the technical solution according to the embodiment of the present application, the end cover includes a cover body and a first convex portion. The cover body is configured to close the opening of the housing. The cover body is located on the side away from the electrode assembly of the first position limiting portion. The first convex portion is provided so as to exceed the first position limiting portion in the direction away from the cover body such that the first convex portion abuts against the first tab. Thereby, good contact between the first convex portion and the first tab is ensured, the current passing area between the first tab and the end cover is increased, and it is reduced that the first tab is restricted by the first position limiting portion of the housing and cannot contact the end cover, so that the performance of the battery can be guaranteed.

[0045] The technical solution described in the embodiment of the present application is applicable to batteries and electrical equipment using the batteries. Examples of the electrical equipment include vehicles, mobile phones, portable devices, notebook computers, ships, aircraft, electric toys, and electric tools. Vehicles include fuel vehicles, natural gas vehicles, or new energy vehicles. New energy vehicles include electric vehicles, hybrid vehicles, or range extender electric vehicles. Aircraft include airplanes, rockets, space shuttles, and spaceships. Electric toys include fixed or mobile ones, such as game consoles, electric vehicle toys, electric boat toys, and electric airplane toys. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools. Examples include electric drills, electric grinders, electric wrenches, electric drivers, electric hammers, impact electric drills, concrete vibrators, and electric cutters. In the embodiment of the present application, the above electrical equipment is not particularly limited.

[0046] For the sake of simplicity in the following description, an example where the electrical equipment is a vehicle will be described.

[0047] Referring to FIG. 1, FIG. 1 is a schematic configuration diagram of a vehicle 1000 according to some embodiments of the present application. A battery 100 is disposed inside the vehicle 1000, and the battery 100 is disposed at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used, for example, as a power supply for operating the vehicle 1000 to supply power to the vehicle 1000.

[0048] The vehicle 1000 further includes a control device 200 and an engine 300, and the control device 200 controls power supply from the battery 100 to the engine 300 and is used, for example, to satisfy the power requirements for starting, navigation, and work electricity during driving of the vehicle 1000.

[0049] In some embodiments of the present application, the battery 100 is not only used as a power supply for operating the vehicle 1000, but can also be used as a drive power supply for the vehicle 1000 to provide driving power to the vehicle 1000 instead of or partially replacing gasoline or natural gas.

[0050] In some embodiments, referring to FIG. 2, FIG. 2 is a schematic configuration diagram of the battery 100 according to some embodiments of the present application. The battery 100 includes a housing 10 and battery cells 20, and the housing 10 is configured to accommodate the battery cells 20.

[0051] The housing 10 includes a first part 11 and a second part 12. When the first part 11 and the second part 12 are combined, a housing chamber 13 for accommodating the battery cells 20 is formed. The first part 11 and the second part 12 can be of various shapes such as a cuboid, a cylinder, etc. The first part 11 has a hollow structure with an open side on one side, and the second part 12 also has a hollow structure with an open side on one side. The housing 10 having the housing chamber 13 may be formed by covering the open side of the second part 12 so as to cover the open side of the first part 11. As shown in FIG. 2, the first part 11 has a hollow structure with an open side on one side, the second part 12 has a plate-like structure, and the housing 10 having the housing chamber 13 may be formed by covering the open side of the first part 11 with the second part 12. Exemplarily, in FIG. 2, both the first part 11 and the second part 12 have a cuboid structure.

[0052] Sealing is achieved between the first part 11 and the second part 12 by a sealing member, and the sealing member is a seal ring, a seal adhesive, etc.

[0053] In the battery 100, there may be one battery cell 20 or a plurality of battery cells 20. When there are a plurality of battery cells 20, the plurality of battery cells 20 may be connected in series, in parallel, or in a connection method including both. The connection method including both means that among the plurality of battery cells 20, there are those connected in series and those connected in parallel. First, a plurality of battery cells 20 are connected in series, in parallel, or in a connection method including both to form a battery module, and then a plurality of battery modules are further connected in series, in parallel, or in a connection method including both to be integrally formed and accommodated in the housing 10. Alternatively, all the battery cells 20 may be directly connected in series, in parallel, or in a connection method including both, and the integrated unit composed of all the battery cells 20 may be accommodated in the housing 10.

[0054] In some embodiments, the battery 100 may further include a busbar member. In this case, the plurality of battery cells 20 are electrically connected via the busbar member to realize a connection in a manner including series connection, parallel connection, or both of the plurality of battery cells 20.

[0055] The busbar member can be a metal conductor such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0056] Referring to FIGS. 3 and 4, FIG. 3 is an exploded view of the battery cell 20 according to some embodiments of the present application, and FIG. 4 is a cross-sectional view of the battery cell 20 shown in FIG. 3. The battery cell 20 includes an electrode assembly 21, a housing 22, and an end cover 23. The electrode assembly 21 includes a first tab 212. The housing 22 has an opening 221 and a first position limiting portion 222, and the housing 22 is configured to accommodate the electrode assembly 21. The end cover 23 includes a cover body 231, and the cover body 231 is configured to close the opening 221. In the thickness direction Z of the end cover 23, the cover body 231 is located on the side away from the electrode assembly 21 of the first position limiting portion 222, and the first position limiting portion 222 restricts the movement of the cover body 231 along the direction toward the electrode assembly 21 with respect to the housing 22. The end cover 23 further has a first convex portion 232 protruding from the inner surface of the cover body 231 toward the electrode assembly 21, and the first convex portion 232 is configured to be provided beyond the first position limiting portion 222 in the direction away from the cover body 231 so that the first convex portion 232 abuts against the first tab 212.

[0057] The first convex portion 232 of the end cover 23 is provided beyond the first position limiting portion 222 in the direction away from the cover body 231, so as to protrude and contact the first tab 212. Thereby, good contact between the first convex portion 232 and the first tab 212 is ensured, the current passing area between the first tab 212 and the end cover 23 is increased, and the risk that the first tab 212 cannot contact the end cover 23 due to being restricted by the first position limiting portion 222 of the housing 22 is reduced, and the performance of the battery 100 can be guaranteed.

[0058] Here, when the first convex portion 232 contacts the first tab 212, electrical connection between the end cover 23 and the first tab 212 is realized. In some embodiments, the first convex portion 232 may be fixedly connected to the first tab 212. For example, by welding the first convex portion 232 to the first tab 212, the first convex portion 232 can always be in good contact with the first tab 212. The method of connecting the first convex portion 232 and the first tab 212 by welding is easy to implement.

[0059] In some embodiments, in the thickness direction Z of the end cover 23, since the first convex portion 232 has a contact plane 2321 that contacts the first tab 212, the contact area between the first tab 212 and the first convex portion 232 is increased, and thus the current passing area between the first tab 212 and the end cover 23 is increased. The contact plane 2321 is provided closer to the electrode assembly 21 than the entire first position limiting portion 222 so that the first convex portion 232 exceeds the first position limiting portion 222 in the direction away from the cover body 231.

[0060] In the actual assembly process, after the cover body 231 of the end cover 23 covers the opening 221 of the housing 22 and the contact plane 2321 contacts the first tab 212, the first convex portion 232 and the first tab 212 are integrally welded outside the end cover 23. For example, the first convex portion 232 and the first tab 212 are welded by laser welding.

[0061] In some embodiments, the electrode assembly 21 includes a main body portion 211, a first tab 212, and a second tab 213, and the first tab 212 and the second tab 213 have opposite polarities to each other. Both the first tab 212 and the second tab 213 protrude from the main body portion 211, the first tab 212 is electrically connected to the end cover 23, and the second tab 213 is electrically connected to the housing 22.

[0062] The first tab 212 and the second tab 213 may be installed at opposite ends of the main body portion 211, or may be installed at the same end of the main body portion 211. In FIG. 4, the first tab 212 and the second tab 213 are respectively installed at opposite ends of the main body portion 211.

[0063] The main body portion 211 includes a positive electrode plate, a negative electrode plate, and a separator. The main body portion 211 may be a wound structure formed by winding the positive electrode plate, the separator, and the negative electrode plate, or may be a stacked structure formed by laminating the positive electrode plate, the separator, and the negative electrode plate of the main body portion 21.

[0064] The positive electrode plate includes a positive electrode current collector and positive electrode active material layers coated on both opposite sides of the positive electrode current collector. The negative electrode plate includes a negative electrode current collector and negative electrode active material layers coated on both opposite sides of the negative electrode current collector. The main body portion 211 is a portion of the electrode assembly 21 corresponding to the region where the active material layer of the electrode plate is coated, and the tab is a portion of the electrode assembly 21 corresponding to the region where the active material layer of the electrode plate is not coated.

[0065] One of the first tab 212 and the second tab 213 is a positive electrode tab and the other is a negative electrode tab. That is, when the first tab 212 is a positive electrode tab, the second tab 213 is a negative electrode tab. When the first tab 212 is a negative electrode tab, the second tab 213 is a positive electrode tab. The positive electrode tab is the region where the positive electrode active material layer is not coated on the positive electrode plate, and the negative electrode tab is the region where the negative electrode active material layer is not coated on the negative electrode plate.

[0066] In an embodiment of the present application, the housing 22 is configured to accommodate the electrode assembly 21. When the cover body 231 of the end cover 23 is covered to cover the opening 221 of the housing 22, a sealed space 24 for accommodating the electrode assembly 21 and the electrolyte is formed by the end cover 23 and the housing 22, and the electrolyte can be an electrolytic solution.

[0067] The housing 22 can be of various shapes such as, for example, a cylindrical shape or a rectangular parallelepiped shape. The shape of the housing 22 may be determined according to the specific shape of the electrode assembly 21. For example, when the electrode assembly 21 has a cylindrical structure, the housing 22 also has a cylindrical structure. When the electrode assembly 21 has a rectangular parallelepiped structure, the housing 22 also has a rectangular parallelepiped structure. Exemplarily, in FIG. 4, the housing 22 has a hollow cylindrical structure.

[0068] The housing 22 can be made of a metal material such as, for example, copper, iron, aluminum, steel, or an aluminum alloy.

[0069] In some embodiments, as shown in FIG. 4, the housing 22 includes a housing body 223 and a shield 224. The housing body 223 has a hollow structure with both ends open. When the shield 224 is connected to one end of the housing body 223, the other end of the housing body 223 is formed as the opening 221, and the cover body 231 of the end cover 23 is covered to cover the opening 221.

[0070] Exemplarily, the first tab 212 of the electrode assembly 21 is electrically connected to the end cover 23, and the second tab 213 of the electrode assembly 21 is electrically connected to the shield 224 of the housing 22. The first tab 212 and the end cover 23, and the second tab 213 and the shield 224 can be connected by welding.

[0071] The shielding body 224 and the housing main body 223 may have an integrally formed structure or may be separate from each other. When the shielding body 224 and the housing main body 223 are separate from each other, the configurations of the shielding body 224 and the end cover 23 may be the same or different. The connection method between the shielding body 224 and the housing main body 223 may be the same as or different from the connection method between the end cover 23 and the housing main body 223. The connection method between the shielding body 224 and the second tab 213 may be the same as or different from the connection method between the end cover 23 and the first tab 212.

[0072] Exemplarily, in FIG. 4, the housing main body 223 has a cylindrical structure, the shielding body 224 has a plate-like structure, and the shielding body 224 and the housing main body 223 are separate from each other.

[0073] In some embodiments, in the thickness direction Z of the end cover 23, the first position limiting portion 222 of the housing 22 covers at least a part of the first tab 212, and the first position limiting portion 222 restricts the electrode assembly 21 from exiting the housing 22 through the opening 221 of the housing 22.

[0074] Specifically, the first position limiting portion 222 is formed on the housing main body 223 of the housing 22. Exemplarily, the first position limiting portion 222 is an annular structure protruding from the inner peripheral surface of the housing main body 223.

[0075] Optionally, a roll press groove 2231 is formed at a position on the outer peripheral surface of the housing main body 223 corresponding to the first position limiting portion 222. In the actual molding process, roll pressing is performed to form the roll press groove 2231 on the outer peripheral surface of the housing main body 223 in a roll pressing manner, so as to form the first position limiting portion 222 protruding inward on the inner peripheral surface of the housing main body 223.

[0076] Note that the cover body 231 of the end cover 23 and the housing 22 may be insulatingly connected or electrically connected. The shielding body 224 and the housing body 223 may be integrated, or the shielding body 224 and the housing body 223 may be separate from each other. When the shielding body 224 and the housing body 223 are electrically connected, the cover body 231 and the housing body 223 of the housing 22 can be insulatingly connected to reduce the short-circuit risk. When the shielding body 224 and the housing body 223 are separate from each other and are insulatingly connected, the cover body 231 and the housing body 223 of the housing 22 can be electrically connected to reduce the short-circuit risk.

[0077] In some embodiments, referring to FIG. 5, FIG. 5 is a partially enlarged view of the battery cell 20 shown in FIG. 4. The battery cell 20 further includes a first insulating member 25, and the first insulating member 25 is configured to separate the cover body 231 and the housing 22 so as to achieve an insulating connection between the cover body 231 and the housing 22 and maintain insulation therebetween. Realizing the insulating connection between the cover body 231 and the housing 22 through the first insulating member 25 means realizing the insulating connection between the cover body 231 and the housing body 223 of the housing 22 through the first insulating member 25.

[0078] Since the cover body 231 and the housing 22 are insulatingly connected through the first insulating member 25, even if the housing 22 and the end cover 23 have charges of different polarities, it is less likely that a short circuit will occur due to the contact between the cover body 231 and the housing 22. However, if the first tab 212 bounces up and contacts the first position limiting portion 222 of the housing 22, there is still a risk of short circuit.

[0079] In the embodiments of the present application, since the first convex portion 232 of the end cover 23 is provided beyond the first position limiting portion 222 in the direction in which it is separated from the cover body 231 and the first convex portion 232 is in contact with the first tab 212, the first convex portion 232 restricts the first tab 212, and the risk of short - circuit between the positive and negative electrodes caused by the tab bouncing up and contacting the first position limiting portion 222 can be reduced.

[0080] Here, the first insulating member 25 can be made of an insulating material such as plastic or rubber.

[0081] The end cover 23 functions as one output electrode of the battery cell 20, and the housing body 223 or the shielding body 224 of the housing 22 functions as the other output electrode of the battery cell 20. The end cover 23 can be set as the positive output electrode and the housing body 223 or the shielding body 224 as the negative output electrode, or the end cover 23 can be set as the negative output electrode and the housing body 223 or the shielding body 224 as the positive output electrode. The positive output electrode and the negative output electrode are the parts of the battery cell 20 that are connected to other components to output the electrical energy of the battery cell 20. In the example where two battery cells 20 are electrically connected by a bus bar member to realize the series connection of the two battery cells 20, the positive output electrode of one battery cell 20 and the negative output electrode of the other battery cell 20 are welded to the same bus bar member.

[0082] In some embodiments, the cover body 231 is hermetically connected to the housing 22 via the first insulating member 25, that is, the first insulating member 25 plays a role of insulation and also a role of sealing between the cover body 231 and the housing 22.

[0083] In some embodiments, the first insulating member 25 includes an insulating portion 251 and a pressing portion 252. The insulating portion 251 is configured to separate the cover body 231 and the housing 22 so as to achieve an insulating connection therebetween. The pressing portion 252 is connected to the insulating portion 251. By abutting the pressing portion 252 against the first tab 212 and restricting the first tab 212, the risk of short - circuit between the positive and negative electrodes due to the first tab 212 springing up and contacting the first position - limiting portion 222 is reduced. That is, the first insulating member 25 realizes insulation between the cover body 231 and the housing 22 and also plays a role in restricting the first tab 212.

[0084] Exemplarily, the cover body 231 is hermetically connected to the housing 22 through the insulating portion 251 of the first insulating member 25.

[0085] In some embodiments, the insulating portion 251 includes a first insulating segment 2511, a second insulating segment 2512, and a third insulating segment 2513, and the pressing portion 252, the first insulating segment 2511, the second insulating segment 2512, and the third insulating segment 2513 are connected in sequence. The first insulating segment 2511 and the third insulating segment 2513 are respectively located on both sides of the cover body 231 in the thickness direction Z of the end cover 23. The cover body 231 is abutted against the first position - limiting portion 222 through the first insulating segment 2511. Thereby, the first position - limiting portion 222 plays a role in restricting the cover body 231 so as to limit the movement of the cover body 231 in the direction towards the electrode assembly 21. The second insulating segment 2512 is located between the inner circumferential surface of the housing 22 and the outer circumferential surface of the cover body 231. The insulating portion 251 configured in such a manner plays an excellent insulating role and also an excellent sealing role between the cover body 231 and the housing 22.

[0086] Exemplarily, the first insulating segment 2511, the second insulating segment 2512, and the third insulating segment 2513 are all annular structures extending in the circumferential direction of the cover body 231.

[0087] In some embodiments, in the thickness direction Z of the end cover 23, the pressing portion 252 extends in a direction from the insulating portion 251 toward the tab so that the pressing portion 252 abuts against the first tab 212. According to such a configuration, the pressing effect of the pressing portion 252 on the first tab 212 is better, and it is difficult for the first tab 212 to bounce up.

[0088] Exemplarily, in the thickness direction Z of the end cover 23, the pressing portion 252 extends in a direction from the first insulating segment 2511 of the insulating portion 251 toward the first tab 212.

[0089] In some embodiments, the pressing portion 252 is located on the outer peripheral side of the first convex portion 232, the first position limiting portion 222 is located on the outer peripheral side of the pressing portion 252, and the pressing portion 252 is configured to separate the first convex portion 232 and the first position limiting portion 222.

[0090] That is, the pressing portion 252 is located between the first convex portion 232 and the first position limiting portion 222. Thereby, the pressing portion 252 plays a role of separating the first convex portion 232 and the first position limiting portion 222, and reduces the risk that the first convex portion 232 and the first position limiting portion 222 come into contact and cause a short circuit.

[0091] In some embodiments, the pressing portion 252 has an annular structure. According to the pressing portion 252 having such a configuration, the first tab 212 can be pressed over the entire circumference, and a better limiting role can be played for the first tab 212.

[0092] Exemplarily, the pressing portion 252 is an annular structure formed on the outer peripheral side of the first convex portion 232. According to the pressing portion 252 having such a configuration, complete isolation from the first convex portion 232 and the first position limiting portion 222 can be realized.

[0093] In the embodiments of the present application, the pressing portion 252 abutting against the first tab 212 may mean that the pressing portion 252 directly abuts against the first tab 212, or the pressing portion 252 indirectly abuts against the first tab 212.

[0094] In some embodiments, the battery cell 20 further includes a second insulating member 26 configured to separate the first tab 212 from the first position limiting portion 222. In the thickness direction Z of the end cover 23, the second insulating member 26 covers a part of the first tab 212, and the pressing portion 252 abuts against the first tab 212 through a portion of the second insulating member 26 that covers the first tab 212. The pressing portion 252 abuts against the second insulating member 26 in a direction toward the electrode assembly 21, and can prevent the second insulating member 26 from bouncing up.

[0095] The second insulating member 26 can be made of an insulating material such as plastic or rubber.

[0096] Exemplarily, the second insulating member 26 includes an enclosing portion 261 and a covering portion 262. The enclosing portion 261 is configured to surround the outer periphery of the main body portion 211 of the electrode assembly 21. The covering portion 262 is connected to one end of the enclosing portion 261 in the thickness direction Z of the end cover 23. In the thickness direction Z of the end cover 23, the covering portion 262 covers a part of the first tab 212, and the pressing portion 252 abuts against the first tab 212 through the covering portion 262.

[0097] In some embodiments, as shown in FIG. 5, the housing 22 has a second position limiting portion 225. In the thickness direction Z, the cover body 231 is located on the side facing the electrode assembly 21 of the second position limiting portion 225, and both the second position limiting portion 225 and the first position limiting portion 222 limit the movement of the cover body 231 in the thickness direction Z with respect to the housing 22.

[0098] Here, the first position limiting portion 222 limits the movement of the cover body 231 along the direction toward the electrode assembly 21 with respect to the housing 22, and the second position limiting portion 225 limits the movement of the cover body 231 along the direction away from the electrode assembly 21 with respect to the housing 22.

[0099] Optionally, the second position limiting part 225 is a bending structure formed by bending a part of the housing 22 inward to the position of the opening 221. That is, according to the method of bending the housing 22, the second position limiting part 225 can be formed at the position of the opening 221 of the housing 22, and the forming is simple. In the process of assembling the battery cell 20, first, the electrode assembly 21 is accommodated in the housing 22, and then the end cover 23 is covered to cover the opening 221 of the housing 22. Finally, the second position limiting part 225 is formed by bending the housing 22, thereby realizing the position limitation for the end cover 23.

[0100] Specifically, the second position limiting part 225 is a bending structure formed by bending a part of the housing body 223 of the housing 22 inward to the position of the opening 221.

[0101] Exemplarily, the second position limiting part 225 is an annular structure.

[0102] In some embodiments, as shown in FIG. 5, when the cover body 231 and the housing 22 are insulated and connected via the first insulating member 25, the second position limiting part 225 is abutted against the cover body 231 via the third insulating segment 2513. Thus, the third insulating segment 2513 is configured to be located between the inner surface of the second position limiting part 225 and the outer surface of the cover body 231 in the thickness direction Z of the end cover 23.

[0103] In some other embodiments, when the cover body 231 and the housing 22 are electrically connected, the first position limiting part 222 and the second position limiting part 225 are respectively abutted against the inner surface and the outer surface of the cover body 231 directly. In this case, the housing body 223 of the housing 22 and the shielding body 224 are insulated and connected.

[0104] In some embodiments, referring to FIG. 6, FIG. 6 is a partially shown view of the battery cell 20 shown in FIG. 4. The end cover 23 further has a second convex portion 233 protruding in a direction away from the electrode assembly 21 from the outer surface of the cover body 231. The outer surface of the second convex portion 233 and the outer surface of the second position limiting portion 225 are aligned. Thereby, it contributes to the connection between the second convex portion 233 and the bus bar member, ensures that the second convex portion 233 and the bus bar member have a relatively large contact area after connection, and contributes to the passage of current.

[0105] Exemplarily, the second position limiting portion 225 is configured to surround the outer periphery of the second convex portion 233.

[0106] In some embodiments, the second position limiting portion 225 and the second convex portion 233 are respectively two output electrodes of the battery cell 20. The second convex portion 233 may be used as the positive output electrode and the second position limiting portion 225 may be used as the negative output electrode, or the second convex portion 233 may be used as the negative output electrode and the second position limiting portion 225 may be used as the positive output electrode. In an example where two battery cells 20 are electrically connected by a bus bar member to realize the series connection of the two battery cells 20, the second position limiting portion 225 of one battery cell 20 and the second convex portion 233 of the other battery cell 20 are welded to the same bus bar member.

[0107] The outer surface of the second convex portion 233 and the outer surface of the second position limiting portion 225 are aligned, which contributes to the connection of the outer surface of the second position limiting portion 225 to another bus bar member after the outer surface of the second convex portion 233 is connected to one bus bar member.

[0108] In some embodiments, as shown in FIG. 6, the end cover 23 is provided with a liquid injection hole 234, and the electrolyte can be injected into the battery cell 20 through the liquid injection hole 234. The outer peripheral surface of the first convex portion 232 is located on the outer peripheral side of the liquid injection hole 234, and a rectifying passage 235 is provided in the first convex portion 232. The rectifying passage 235 is configured to rectify the electrolyte so that it flows out of the outer peripheral surface of the first convex portion 232.

[0109] When injecting the electrolytic solution into the inside of the battery cell 20 through the liquid injection hole 234, the electrolytic solution can flow laterally from the rectifying passage 235 and finally flow out to the outside of the outer peripheral surface of the first convex portion 232. Therefore, the efficiency of liquid injection can be improved, efficient liquid injection can be realized, and the electrolytic solution can easily infiltrate into the electrode plates in the electrode assembly 21.

[0110] Exemplarily, the liquid injection hole 234 and the outer peripheral surface of the first convex portion 232 are coaxially installed.

[0111] The rectifying passage 235 in the first convex portion 232 may have one or a plurality. When there are a plurality of rectifying passages 235, the plurality of rectifying passages 235 can be arranged on the first convex portion 232 at intervals in the circumferential direction around the liquid injection hole 234.

[0112] In some embodiments, the electrode assembly 21 has a central hole 214, and in the thickness direction Z of the end cover 23, the rectifying passage 235 and the central hole 214 are coaxially installed. Thereby, the electrolytic solution that has entered the liquid injection hole 234 can directly enter the central hole 214 and infiltrate into the electrode plates in the electrode assembly 21.

[0113] In some embodiments, the end cover 23 is provided with a recess 236, and the recess 236 is configured to be recessed in a direction away from the electrode assembly 21 from the end in contact with the first tab 212 of the first convex portion 232. Both ends of the rectifying passage 235 penetrate the inner peripheral surface of the recess 236 and the outer peripheral surface of the first convex portion 232, respectively. The end cover 23 has a liquid outflow surface 237 located in the recess 236, the bottom end of the liquid injection hole 234 penetrates the liquid outflow surface 237, and in the thickness direction Z of the end cover 23, the liquid outflow surface 237 is farther from the electrode assembly 21 than the contact plane 2321 of the first convex portion 232. Therefore, the liquid outflow surface 237 and the first tab 212 are spaced apart in the thickness direction Z of the end cover 23. According to such a configuration, after the electrode liquid enters the inside of the battery cell 20 through the liquid injection hole 234, it first enters the recess 236 and then enters the rectifying passage 235. In this way, it can contribute to the electrolytic solution flowing laterally and flowing out to the outside of the outer peripheral surface of the first convex portion 232.

[0114] Exemplarily, the rectifying path 235 is a groove that is installed on the abutting plane 2321 and penetrates the inner peripheral surface of the recess 236 and the outer peripheral surface of the first convex portion 232.

[0115] In some embodiments, the battery cell 20 further includes a closing member 27 that closes the liquid injection hole 234. After injecting liquid into the battery cell 20 through the liquid injection hole 234, the liquid injection hole 234 is closed by the closing member 27.

[0116] A method for manufacturing the battery cell 20 according to an embodiment of the present application is described with reference to FIG. 7, which is a flowchart of a method for manufacturing the battery cell 20 according to some embodiments of the present application. The manufacturing method includes the following steps. S100 provides an electrode assembly 21 including the first tab 212. S200 provides a housing 22 having an opening 221 and a first position limiting portion 222. S300 provides an end cover 23. S400 houses the electrode assembly 21 in the housing 22. S500 covers the end cover 23 so as to cover the opening 221 of the housing 22.

[0117] Here, the end cover 23 includes a cover body 231, the cover body 231 is configured to close the opening 221, in the thickness direction Z of the end cover 23, the cover body 231 is located on the side away from the electrode assembly 21 of the first position limiting portion 222, and the first position limiting portion 222 restricts the movement of the cover body 231 along the direction toward the electrode assembly 21 with respect to the housing 22. The end cover 23 further has a first convex portion 232 protruding from the inner surface of the cover body 231 toward the electrode assembly 21, and the first convex portion 232 is configured to be provided beyond the first position limiting portion 222 in the direction away from the cover body 231 so that the first convex portion 232 abuts against the first tab 212.

[0118] In the above method, the order of step S100, step S200, and step S300 is not restricted. For example, it may be executed in the order of step S300, step S200, and step S100.

[0119] Regarding the configuration of the battery cell 20 that can be manufactured by the manufacturing method according to each of the above embodiments, since the battery cell 20 according to each of the above embodiments can be referred to, the description thereof is omitted here.

[0120] In addition, the embodiments of the present application further provide a manufacturing facility 2000 for the battery cell 20. Referring to FIG. 8, FIG. 8 is a schematic block diagram of the manufacturing facility 2000 for the battery cell 20 according to some embodiments of the present application. The manufacturing facility 2000 includes a first providing device 2100, a second providing device 2200, a third providing device 2300, and an assembling device 2400.

[0121] The first providing device 2100 is configured to provide an electrode assembly 21 including a first tab 212. The second providing device 2200 is configured to provide a housing 22 having an opening 221 and a first position limiting portion 222. The third providing device 2300 is configured to provide an end cover 23. The assembling device 2400 is configured to accommodate the electrode assembly 21 in the housing 22 and cover the end cover 23 so as to cover the opening 221.

[0122] Here, the end cover 23 includes a cover body 231, the cover body 231 is configured to close the opening 221, in the thickness direction Z of the end cover 23, the cover body 231 is located on the side away from the electrode assembly 21 of the first position limiting portion 222, and the first position limiting portion 222 restricts the movement of the cover body 231 along the direction toward the electrode assembly 21 with respect to the housing 22. The end cover 23 further has a first convex portion 232 protruding from the inner surface of the cover body 231 toward the electrode assembly 21, and the first convex portion 232 is configured to be provided beyond the first position limiting portion 222 in the direction away from the cover body 231 so that the first convex portion 232 abuts against the first tab 212.

[0123] Regarding the configuration of the battery cell 20 that can be manufactured by the manufacturing facility 2000 according to the above embodiments, since the battery cell 20 according to each of the above embodiments can be referred to, the description thereof is omitted here.

[0124] Unless there is a contradiction, the embodiments and features in the embodiments in this application can be combined with each other.

[0125] The above embodiments are merely for explaining the technical solutions of this application and do not limit this application. For those skilled in the art, this application may have various changes and variations. As long as it does not deviate from the spirit and gist of this application, all changes, equivalent substitutions, improvements, etc. made are included within the protection scope of this application.

Description of Reference Numerals

[0126] 10 housing 11 first part 12 second part 13 accommodation chamber 20 battery cell 21 electrode assembly 211 main body part 212 first tab 213 second tab 214 central hole 22 housing 221 opening 222 first position limiting part 223 housing main body 2231 roll press groove 224 shielding body 225 second position limiting part 23 end cover 231 cover main body 232 first convex part 2321 abutting plane 233 second convex part 234 liquid injection hole 235 rectifying passage 236 concave part 237 liquid outflow surface 24 sealed space 25 First insulating member 251 Insulating portion 2511 First insulating segment 2512 Second insulating segment 2513 Third insulating segment 252 Pressing portion 26 Second insulating member 261 Surrounding portion 262 Covering portion 27 Closing member 100 Battery 200 Control device 300 Engine 1000 Vehicle 2000 Manufacturing equipment 2100 First providing device 2200 Second providing device 2300 Third providing device 2400 Assembly device Z Thickness direction

Claims

1. comprising an electrode assembly, a housing, and an end cover, the electrode assembly includes a main body portion and a first tab, the first tab protruding from the main body portion, the housing has an opening and a first position limiting portion, and is configured to accommodate the electrode assembly, the end cover includes a cover main body, the cover main body being configured to close the opening, in the thickness direction of the end cover, the cover main body being located on the side away from the electrode assembly of the first position limiting portion, the first position limiting portion restricting the movement of the cover main body along the direction towards the electrode assembly with respect to the housing, the end cover further has a first convex portion protruding from the inner surface of the cover main body towards the electrode assembly, the first convex portion being provided beyond the first position limiting portion in the direction away from the cover main body such that the first convex portion abuts against the first tab, and the first tab being configured to be electrically connected to the end cover, in the thickness direction, the first convex portion has a contact plane that abuts against the first tab, and the contact plane is provided closer to the electrode assembly than the entire first position limiting portion. A battery cell characterized by the above.

2. The battery cell further includes a first insulating member configured to separate the cover main body and the housing so as to achieve an insulating connection between the cover main body and the housing. The battery cell according to claim 1, characterized by the above.

3. The cover main body is hermetically connected to the housing via the first insulating member. The battery cell according to claim 2, characterized by the above.

4. The housing further has a second position limiting portion. In the thickness direction, the cover body is located on the side facing the electrode assembly of the second position limiting portion, and both the second position limiting portion and the first position limiting portion limit the movement of the cover body in the thickness direction with respect to the housing. The battery cell according to any one of claims 1 to 3, characterized in that.

5. The second position limiting portion is a bent structure formed at the position of the opening by bending a part of the housing inward. The battery cell according to claim 4, characterized in that.

6. The end cover further has a second convex portion protruding from the outer surface of the cover body in a direction away from the electrode assembly, and the outer surface of the second convex portion and the outer surface of the second position limiting portion are aligned. The battery cell according to claim 4 or 5, characterized in that.

7. The first convex portion is welded to the first tab. The battery cell according to any one of claims 1 to 6, characterized in that.

8. A battery cell according to any one of claims 1 to 7, and A housing for housing the battery cell and A battery comprising.

9. An electrical equipment comprising the battery according to claim 8.

10. Providing an electrode assembly including a main body portion and a first tab, the first tab protruding with respect to the main body portion; Providing a housing having an opening and a first position limiting portion; Providing an end cover; Accommodating the electrode assembly in the housing; Covering the end cover so as to cover the opening, including. The end cover includes a cover body, the cover body is configured to close the opening, in the thickness direction of the end cover, the cover body is located on the side away from the electrode assembly of the first position limiting portion, and the first position limiting portion restricts the movement of the cover body along the direction towards the electrode assembly with respect to the housing. The end cover further has a first convex portion protruding from the inner surface of the cover body towards the electrode assembly, and the first convex portion is provided beyond the first position limiting portion in the direction away from the cover body so that the first convex portion abuts against the first tab, and the first tab is configured to be electrically connected to the end cover. In the thickness direction, the first convex portion has a contact plane that abuts against the first tab, and the contact plane is provided closer to the electrode assembly than the entire first position limiting portion. A method for manufacturing a battery cell, characterized in that.

11. A first providing device that provides an electrode assembly including a main body portion and a first tab, the first tab protruding with respect to the main body portion, A second providing device that provides a housing having an opening and a first position limiting portion, A third providing device that provides an end cover, An assembling device that houses the electrode assembly in the housing and covers the end cover so as to cover the opening, and is provided with. The end cover includes a cover body, the cover body is configured to close the opening, in the thickness direction of the end cover, the cover body is located on the side away from the electrode assembly of the first position limiting portion, and the first position limiting portion restricts the movement of the cover body along the direction towards the electrode assembly with respect to the housing. The end cover further has a first convex portion that protrudes in a direction from the inner surface of the cover body toward the electrode assembly, and the first convex portion is provided beyond the first position limiting portion in a direction away from the cover body such that the first convex portion abuts against the first tab, and the first tab is configured to be electrically connected to the end cover. In the thickness direction, the first convex portion has a contact plane that abuts against the first tab, and the contact plane is provided closer to the electrode assembly than the entire first position limiting portion. A manufacturing facility for a battery cell, characterized by the above.

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