Battery monomer, battery and electric equipment

Abstract

The embodiment of the utility model provides a battery monomer, a battery and electric equipment. The battery cell includes: a housing including a first wall; the electrode leading-out piece is at least partially arranged on one side, deviating from the interior of the battery monomer, of the first wall and is used for leading out electric energy of the battery monomer; the first insulating part is at least partially arranged between the first wall and the electrode leading-out part so as to insulate and isolate the first wall from the electrode leading-out part; wherein the first insulating part comprises a first positioning part, the electrode leading-out part comprises a second positioning part, and the first positioning part is matched with the second positioning part so as to position the electrode leading-out part. The battery monomer has relatively high production efficiency.

Description

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 the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the manufacturing process of batteries, the production efficiency of batteries is an issue that cannot be ignored. Therefore, how to improve the production efficiency of batteries is a technical problem that needs to be solved urgently in battery technology. Utility Model Content

[0004] The purpose of the present application is to provide a battery cell, a battery and an electrical device. The battery cell has a high production efficiency.

[0005] This application is achieved through the following technical solutions:

[0006] In a first aspect, the present application provides a battery cell, comprising: an outer shell, comprising a first wall; an electrode lead-out member, at least partially disposed on a side of the first wall facing away from the interior of the battery cell, for leading out electrical energy of the battery cell; a first insulating member, at least partially disposed between the first wall and the electrode lead-out member, to insulate and isolate the first wall from the electrode lead-out member; wherein the first insulating member comprises a first positioning portion, the electrode lead-out member comprises a second positioning portion, and the first positioning portion cooperates with the second positioning portion to position the electrode lead-out member.

[0007] According to the battery cell of the embodiment of the present application, the first insulating part includes a first positioning portion, and the electrode lead-out part includes a second positioning portion. The first positioning portion cooperates with the second positioning portion to achieve positioning of the electrode lead-out part, which facilitates positioning and assembly, improves the assembly convenience of the electrode lead-out part and the first insulating part, and improves the production efficiency of the battery cell.

[0008] According to some embodiments of the present application, one of the first positioning portion and the second positioning portion is a first protrusion, and the other of the first positioning portion and the second positioning portion is a first groove.

[0009] In the above solution, the first protrusion cooperates with the first groove, the structure is simple, and the assembly of the first insulating member and the electrode lead-out member is easy to achieve.

[0010] According to some embodiments of the present application, along the thickness direction of the first wall, a projection of the first protrusion on the first wall is polygonal or elliptical.

[0011] In the above solution, the projection of the first protrusion on the first wall is polygonal or elliptical, which can limit the rotation of the electrode lead-out member relative to the first insulating member and improve the positioning accuracy of the electrode lead-out member and the first insulating member.

[0012] According to some embodiments of the present application, the number of the first positioning portions and the number of the second positioning portions are both plural, and the first positioning portions correspond one to one to the second positioning portions.

[0013] In the above scheme, multiple first positioning parts and multiple second positioning parts cooperate to realize the assembly of the electrode lead-out part and the first insulating part at multiple positions, and can limit the rotation of the electrode lead-out part relative to the first insulating part, so that the first insulating part has a higher positioning effect on the electrode lead-out part.

[0014] According to some embodiments of the present application, the first insulating member includes a first surface facing away from the first wall, the first positioning portion is a first protrusion protruding from the first surface, and the second positioning portion is a first groove.

[0015] In the above solution, the matching structure of the first groove and the first protrusion is simple in structure, easy to process and easy to match.

[0016] According to some embodiments of the present application, along the thickness direction of the first wall, the cross-sectional area of ​​the first protrusion gradually decreases from an end close to the first wall to an end away from the first wall.

[0017] In the above solution, along the thickness direction of the first wall, the cross-sectional area of ​​the first protrusion gradually decreases toward the end away from the first wall, which can guide the first protrusion into the first groove to reduce the difficulty of inserting the first protrusion into the first groove.

[0018] According to some embodiments of the present application, the first groove extends to the edge of the electrode lead-out member.

[0019] In the above solution, the first groove extends to the edge of the electrode lead-out member, which facilitates processing of the first groove from the edge of the electrode lead-out member and reduces processing difficulty.

[0020] According to some embodiments of the present application, the first groove penetrates the electrode lead-out member along the thickness direction of the electrode lead-out member.

[0021] In the above solution, the first groove passes through the electrode lead-out member, which is convenient for processing and can reduce the weight of the electrode lead-out member.

[0022] According to some embodiments of the present application, the height of the first protrusion protruding from the first surface is H1, satisfying 0.5 mm≤H1≤1.5 mm.

[0023] In the above solution, the height H1 of the first protrusion protruding from the first surface satisfies the above range, so that the first protrusion and the first groove have a good positioning effect. If the height H1 of the first protrusion protruding from the first surface is less than 0.5 mm, the positioning effect between the first groove and the first protrusion is poor; if the height H1 of the first protrusion protruding from the first surface is greater than 1.5 mm, the first protrusion occupies a large assembly space in the thickness direction of the first wall.

[0024] According to some embodiments of the present application, the battery cell further includes: two electrode terminals, disposed on the first wall; the electrode lead-out member is provided with two first through holes, the two first through holes are respectively used to install the two electrode terminals, and the second positioning portion is located between the two first through holes.

[0025] In the above solution, the second positioning portion is located between the two first through holes, and the first insulating member positions the electrode lead member by cooperating with the second positioning portion, thereby reducing the machining accuracy of the first through holes.

[0026] According to some embodiments of the present application, the first wall includes a third positioning portion, the first insulating member includes a fourth positioning portion, and the third positioning portion cooperates with the fourth positioning portion to position the first insulating member.

[0027] In the above solution, the third positioning portion cooperates with the fourth positioning portion to facilitate positioning of the first wall on the first insulating member, thereby improving assembly efficiency.

[0028] According to some embodiments of the present application, along the thickness direction of the first wall, an area enclosed by the projection of the fourth positioning portion on the first wall at least partially overlaps with the projection of the first positioning portion on the first wall.

[0029] In the above solution, the area enclosed by the fourth positioning portion on the first wall at least partially overlaps with the projection of the first positioning portion on the first wall, so that the structure of the first insulating member is compact.

[0030] According to some embodiments of the present application, along the thickness direction of the first wall, a projection of the fourth positioning portion on the first wall falls within a projection of the first positioning portion on the first wall.

[0031] In the above solution, the projection of the fourth positioning portion on the first wall falls within the projection of the first positioning portion on the first wall, so that the structure of the first insulating member is relatively compact.

[0032] According to some embodiments of the present application, the first insulating member includes a first surface facing away from the first wall and a second surface facing the first wall, the first positioning portion is disposed on the first surface, and the fourth positioning portion is disposed on the second surface.

[0033] In the above solution, the first positioning portion and the fourth positioning portion are respectively located on two opposite surfaces of the first insulating member, so as to facilitate the assembly of the first insulating member with the electrode lead-out member and the first wall in the thickness direction of the first wall.

[0034] According to some embodiments of the present application, the first wall includes a third surface facing away from the interior of the battery cell, the third positioning portion is a second protrusion protruding from the third surface, and the fourth positioning portion is a second groove.

[0035] In the above solution, the third positioning portion is the second protrusion, the fourth positioning portion is the second groove, and the matching structure of the second protrusion and the second groove is simple in structure and easy to process.

[0036] According to some embodiments of the present application, the second groove penetrates the first insulating member along the thickness direction of the first insulating member.

[0037] In the above solution, the second groove passes through the first insulating member, which is convenient for processing and can reduce the weight of the first insulating member.

[0038] According to some embodiments of the present application, the height of the second protrusion protruding from the third surface is H2, satisfying 0.3mm≤H2≤1.5mm.

[0039] In the above solution, the height H2 of the second protrusion protruding from the third surface satisfies the above range, so that the second protrusion and the second groove have a better matching effect. If the height H2 of the second protrusion protruding from the third surface is too small, the positioning effect between the second groove and the second protrusion is poor; if the height H2 of the second protrusion protruding from the third surface is too large, the second protrusion occupies a larger assembly space in the thickness direction of the first wall.

[0040] According to some embodiments of the present application, the battery cell further includes: two electrode terminals, disposed on the first wall; the first insulating member is provided with two second through holes, the two second through holes are respectively used to install the two electrode terminals, and the fourth positioning portion is located between the two second through holes.

[0041] In the above solution, the fourth positioning portion is located between the two second through holes, and the first wall is positioned on the first insulating member by cooperating with the third positioning portion, which can reduce the processing accuracy of the second through holes.

[0042] According to some embodiments of the present application, the first wall is provided with two electrode mounting holes, the two electrode mounting holes are respectively used to mount the two electrode terminals, the hole diameter of the electrode mounting hole is D1, and the hole diameter of the second through hole is D2, satisfying D1 <D2。

[0043] In the above scheme, the diameter D1 of the electrode mounting hole and the diameter D2 of the second through hole satisfy the above relationship, so that the processing accuracy of the second through hole is relatively low. The first wall can be positioned on the first insulating member by cooperating with the fourth positioning portion and the third positioning portion.

[0044] According to some embodiments of the present application, 0.5 mm ≤ D2 - D1 ≤ 1 mm is satisfied.

[0045] In the above scheme, the difference between the aperture D2 of the second through hole and the aperture D1 of the electrode mounting hole satisfies the above relationship, and the electrode terminal and the second through hole have a certain assembly gap, which facilitates the assembly of the second through hole and the electrode terminal. If the difference between the aperture D2 of the second through hole and the aperture D1 of the electrode mounting hole is too small, it is not conducive to the assembly of the second through hole and the electrode terminal; if the difference between the aperture D2 of the second through hole and the aperture D1 of the electrode mounting hole is too large, there is a large gap between the outer peripheral surface of the electrode terminal and the hole wall of the second through hole, and the assembly effect of the first insulating member and the electrode terminal is poor.

[0046] According to some embodiments of the present application, the housing includes a shell and a cover, the shell has an opening, the cover closes the opening, and the first wall is the cover.

[0047] In the above solution, the first wall is a cover body, which facilitates the assembly of the first insulating member and the first wall.

[0048] According to some embodiments of the present application, the first wall is the wall with the largest area among all the walls of the battery cell.

[0049] In a second aspect, the present application provides a battery, comprising: a box body; a busbar component housed in the box body; a plurality of battery cells provided by any of the above embodiments housed in the box body, the plurality of battery cells being stacked along the thickness direction of the first wall, the electrode lead-out members of the plurality of battery cells being electrically connected via the busbar component.

[0050] According to the battery of the embodiment of the present application, the busbar component is electrically connected to the electrode lead-out member to facilitate electrical connection between multiple battery cells. The use of the above-mentioned battery cells improves the production efficiency of the battery.

[0051] According to some embodiments of the present application, the battery cell also includes an electrode assembly, which is accommodated in the outer shell, and the electrode assembly has a pole ear; the electrode lead-out member includes a first part and a second part, the first part is parallel to the first wall, the first part is electrically connected to the pole ear, and the second part is connected to the busbar component, and the plane where the connection surface of the second part and the busbar component is located intersects with the first wall.

[0052] In the above solution, the plane where the connection surface of the second portion and the busbar component is located intersects with the first wall, so as to facilitate the connection between the electrode lead-out member and the busbar component.

[0053] According to some embodiments of the present application, the second positioning portion is disposed on the first portion.

[0054] In the above solution, the second positioning portion is arranged on the first portion, so as to facilitate the assembly of the electrode lead-out member and the first insulating member.

[0055] According to some embodiments of the present application, the second part includes a first section, a second section and a third section, the first section extends from the first part in a direction away from the first wall, the second section connects the first section and the third section at an end of the first section away from the first wall, the third section extends from the second section in a direction close to the first wall, and the conduit component is connected to a side of the third section away from the first section.

[0056] In the above solution, the second portion is allowed to deform to absorb the expansion stress.

[0057] According to some embodiments of the present application, the first insulating member includes a main body and a protrusion, the main body is arranged between the electrode lead-out member and the first wall, the protrusion protrudes from the main body along the thickness direction of the first wall, the protrusion is inserted between the first section and the third section, and the first positioning portion is arranged on the main body.

[0058] In the above solution, the protrusion is inserted between the first section and the third section to support the third section, so as to facilitate welding of the third section and the collector component.

[0059] According to some embodiments of the present application, the housing further has a second wall disposed opposite to the first wall, and an edge of the second wall is recessed to form a recess, and the recess is used to accommodate the electrode lead-out piece of the battery cell adjacent to the second wall.

[0060] In the above solution, when multiple battery cells are stacked, the recessed portion can accommodate the electrode lead-out pieces of the battery cells adjacent to the second wall, making rational use of the assembly space and making the battery have a higher energy density.

[0061] In a third aspect, the present application provides an electrical device, comprising a battery cell provided by any of the above embodiments, wherein the battery cell is used to provide electrical energy.

[0062] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0064] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0065] Figure 2 An exploded view of a battery provided for some embodiments of the present application;

[0066] Figure 3 An exploded view of a battery cell provided for some embodiments of the present application;

[0067] Figure 4 A top view of a battery cell provided for some embodiments of the present application;

[0068] Figure 5 for Figure 4 Cross-sectional view in the AA direction;

[0069] Figure 6 for Figure 5 A partial enlarged view of point C;

[0070] Figure 7 A schematic diagram of the structure of an electrode lead-out member provided in some embodiments of the present application;

[0071] Figure 8 A schematic structural diagram of a first insulating member provided in some embodiments of the present application;

[0072] Fig. 9 for Figure 4 Cross-sectional view in the BB direction;

[0073] Fig.10 A schematic diagram of assembling the electrode lead-out member and the first wall provided in some embodiments of the present application;

[0074] In the drawings, the drawings are not drawn to scale.

[0075] Marking description: 100-battery; 101-box; 1011-first sub-box; 1012-second sub-box; 10-battery cell; 11-housing; 111-housing; 112-cover; 113-first wall; 113a-third surface; 1131-third positioning portion; 1132-electrode mounting hole; 114-second wall; 1141-recess; 12-electrode assembly; 121-ear; 13-electrode lead; 13a-fifth surface; 13b-sixth surface; 13c-side; 13d-connection surface; 131-second positioning portion =positioning portion; 132-first through hole; 133-first part; 134-second part; 1341-first section; 1342-second section; 1343-third section; 14-first insulating member; 14a-first surface; 14b-second surface; 141-first positioning portion; 142-fourth positioning portion; 143-second through hole; 144-body; 145-protrusion; 15-electrode terminal; 16-adapter; 17-second insulating member; 18-seal; 20-collector component; 200-controller; 300-motor; 1000-vehicle. DETAILED DESCRIPTION

[0076] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0078] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0079] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0080] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0081] In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "length", "width", "thickness", "inside", "outside", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0082] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0083] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the current collector not coated with the positive active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the current collector not coated with the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. In order to ensure that a large current is passed without melting, the number of positive tabs is multiple and stacked together, and the number of negative tabs is multiple and stacked together. The material of the isolation film can be PP (polypropylene) or PE (polyethylene), etc.

[0084] The battery cell includes a shell, an electrode terminal, an electrode lead-out member and a first insulating member. The shell includes a shell and a cover. The electrode assembly is arranged in the shell. The electrode terminal is inserted into the cover. The electrode lug of the electrode assembly is connected to one end of the electrode terminal. The electrode lead-out member is connected to the other end of the electrode terminal. The electrode lead-out member is used to lead out the electric energy of the battery cell. The first insulating member is arranged between the first wall and the electrode lead-out member to insulate and isolate the first wall from the electrode lead-out member. The electrode lead-out member is provided with a through hole to allow the electrode terminal to pass through. The electrode lead-out member is usually riveted to the electrode terminal.

[0085] The development of battery technology must take into account many design factors at the same time, such as performance parameters such as energy density, discharge capacity, charge and discharge rate, and also the production efficiency of the battery.

[0086] The inventors have found that during the production process of battery cells, the assembly of the first insulating member and the electrode lead-out member is usually achieved by matching the through hole provided in the electrode lead-out member for the power supply terminal to pass through with the through hole provided in the first insulating member for the power supply terminal to pass through, which requires a high processing accuracy of the through hole. If the processing error of the through hole is large, the matching of the electrode lead-out member and the first insulating member is more difficult, resulting in a low assembly efficiency of the battery cell, affecting the production efficiency of the battery cell.

[0087] In view of this, in order to solve the problem of low production efficiency of battery cells caused by the difficulty in assembling the first insulating part and the electrode lead-out part, the inventor has designed a battery cell after in-depth research, in which a first positioning portion is set on the first insulating part and a second positioning portion is set on the electrode lead-out part. The first positioning portion cooperates with the second positioning portion to realize positioning of the electrode lead-out part by the first insulating part, which facilitates positioning and assembly, improves the convenience of assembling the electrode lead-out part and the first insulating part, and improves the production efficiency of the battery cell.

[0088] The battery cells disclosed in the embodiments of the present application can be used, but not limited to, in electrical equipment such as vehicles, ships or aircraft. The power supply system of the electrical equipment can be composed of the battery cells and batteries disclosed in the present application.

[0089] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0090] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0091] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power requirements during the startup, navigation and operation of the vehicle 1000.

[0092] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0093] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0094] Please refer to Figure 2 , Figure 2 An exploded view of a battery provided for some embodiments of the present application. The battery 100 includes a housing 101 and a battery cell 10, and the battery cell 10 is contained in the housing 101. The housing 101 is used to provide a storage space for the battery cell 10, and the housing 101 can adopt a variety of structures. In some embodiments, the housing 101 may include a first sub-housing 1011 and a second sub-housing 1012, and the first sub-housing 1011 and the second sub-housing 1012 cover each other, and the first sub-housing 1011 and the second sub-housing 1012 jointly define a storage space for accommodating the battery cell 10. The second sub-box 1012 may be a hollow structure with one end open, and the first sub-box 1011 may be a plate-like structure, and the first sub-box 1011 covers the open side of the second sub-box 1012, so that the first sub-box 1011 and the second sub-box 1012 jointly define a storage space; the first sub-box 1011 and the second sub-box 1012 may also be hollow structures both with one side open, and the open side of the first sub-box 1011 covers the open side of the second sub-box 1012.

[0095] In the battery 100, there may be multiple battery cells 10, and the multiple battery cells 10 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 10 are both connected in series and in parallel. The multiple battery cells 10 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 10 is accommodated in the box 101; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 10 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 101. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar 20 for realizing electrical connection between the multiple battery cells 10.

[0096] The battery cell 10 may be a secondary battery or a primary battery; the battery cell 10 may be a lithium-ion battery, a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.

[0097] Please refer to Figure 3 , Figure 3 An exploded view of a battery cell provided in some embodiments of the present application. Figure 3 As shown, the battery cell 10 includes a housing 11, an electrode assembly 12, an electrode lead 13 and an electrode terminal 15. The housing 11 includes a shell 111 and a cover 112. The shell 111 has an opening, and the cover 112 closes the opening to isolate the internal environment of the battery cell 10 from the external environment.

[0098] The shell 111 is a component used to cooperate with the cover 112 to form the internal environment of the battery cell 10, wherein the formed internal environment can be used to accommodate the electrode assembly 12, electrolyte and other components. The shell 111 and the cover 112 can be independent components. The shell 111 can be of various shapes and sizes. Specifically, the shape of the shell 111 can be determined according to the specific shape and size of the electrode assembly 12. The material of the shell 111 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. The embodiment of the present application takes the shell 111 as a rectangular parallelepiped as an example.

[0099] The cover 112 refers to a component that covers the opening of the shell 111 to isolate the internal environment of the battery cell 10 from the external environment. Without limitation, the shape of the cover 112 can be adapted to the shape of the shell 111 to match the shell 111. Optionally, the cover 112 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the cover 112 is not easily deformed when squeezed and collided, so that the battery cell 10 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 15 can be provided on the cover 112. The electrode terminal 15 can be used to electrically connect to the electrode assembly 12 for outputting or inputting electrical energy of the battery cell 10. The material of the cover 112 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this. In some embodiments, a second insulating member 17 may be provided inside the cover 112 to isolate the electrical connection components in the housing 111 from the cover 112 to reduce the risk of short circuit. For example, the second insulating member 17 may be made of plastic, rubber, or the like.

[0100] The electrode assembly 12 is a component in the battery cell 10 where electrochemical reactions occur. One or more electrode assemblies 12 may be included in the housing 111. The electrode assembly 12 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the battery cell assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the pole ear 121. The positive pole ear and the negative pole ear may be located together at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the pole ear 121 connects the electrode terminal 15 to form a current loop.

[0101] The electrode lead-out member 13 is a member for leading out the electric energy of the battery cell 10. The electrode lead-out member 13 is connected to the electrode terminal 15 and the current collecting member 20 (see Figure 2 ) is connected to the electrode lead-out piece 13.

[0102] A first insulating member 14 is disposed between the electrode lead-out member 13 and the cover body 112 for insulating and isolating the electrode lead-out member 13 from the cover body 112 .

[0103] See also Figure 3 , and see further Figure 4 , Figure 4 A top view of a battery cell provided in some embodiments of the present application, Figure 5 for Figure 4 The cross-sectional view in the AA direction, Figure 6 for Figure 5 A partial enlarged view of point C of the battery cell 10. According to some embodiments of the present application, the present application provides a battery cell 10. The battery cell 10 includes a shell 11, an electrode lead-out member 13 and a first insulating member 14. The shell 11 includes a first wall 113, and at least a portion of the electrode lead-out member 13 is disposed on a side of the first wall 113 that is away from the interior of the battery cell 10, and the electrode lead-out member 13 is used to lead out the electrical energy of the battery cell 10. At least a portion of the first insulating member 14 is disposed between the first wall 113 and the electrode lead-out member 13 to insulate and isolate the first wall 113 from the electrode lead-out member 13. Among them, the first insulating member 14 includes a first positioning portion 141, and the electrode lead-out member 13 includes a second positioning portion 131, and the first positioning portion 141 cooperates with the second positioning portion 131 to position the electrode lead-out member 13.

[0104] The first wall 113 is a wall of the outer shell 11 . The first wall 113 and other walls of the outer shell 11 define a receiving space, and the electrode assembly 12 is disposed in the receiving space.

[0105] At least part of the electrode lead-out members 13 are arranged on the side of the first wall 113 away from the inside of the battery cell 10. Part of the electrode lead-out members 13 may be arranged on the side of the first wall 113 away from the inside of the battery cell 10, or all of the electrode lead-out members 13 may be arranged on the side of the first wall 113 away from the inside of the battery cell 10. Here, the side of the first wall 113 away from the inside of the battery cell 10 refers to the side of the first wall 113 away from the electrode assembly 12.

[0106] At least part of the first insulating member 14 is disposed between the first wall 113 and the electrode lead-out member 13 . Alternatively, all of the first insulating member 14 may be disposed between the first wall 113 and the electrode lead-out member 13 .

[0107] The first positioning portion 141 is a positioning structure of the first insulating member 14, and the second positioning portion 131 is a positioning structure of the electrode lead-out member 13. The first positioning portion 141 corresponds to the second positioning portion 131, and the first positioning portion 141 and the second positioning portion 131 can cooperate with each other. When the first positioning portion 141 cooperates with the second positioning portion 131, the first insulating member 14 and the electrode lead-out member 13 are positioned and assembled.

[0108] According to the battery cell 10 of the embodiment of the present application, a first positioning portion 141 is provided on the first insulating member 14, and a second positioning portion 131 is provided on the electrode lead-out member 13. The first positioning portion 141 cooperates with the second positioning portion 131 to realize positioning of the electrode lead-out member 13 by the first insulating member 14, which facilitates positioning and assembly, improves the convenience of assembling the electrode lead-out member 13 and the first insulating member 14, and improves the production efficiency of the battery cell 10.

[0109] According to some embodiments of the present application, one of the first positioning portion 141 and the second positioning portion 131 is a first protrusion, and the other of the first positioning portion 141 and the second positioning portion 131 is a first groove.

[0110] The first positioning portion 141 may be a first protrusion, and the second positioning portion 131 may be a first groove; or the first positioning portion 141 may be a first groove, and the second positioning portion 131 may be a first protrusion.

[0111] The first protrusion is arranged corresponding to the first groove, and the first protrusion can be inserted into the first groove to realize the assembly of the first insulating member 14 and the electrode lead-out member 13 .

[0112] In the above solution, the first protrusion cooperates with the first groove, and the structure is simple, which facilitates the assembly of the first insulating member 14 and the electrode lead-out member 13 .

[0113] According to some embodiments of the present application, along the thickness direction Z of the first wall 113 , the projection of the first protrusion on the first wall 113 is polygonal or elliptical.

[0114] In the figure, the direction indicated by the letter Z is the thickness direction of the first wall 113 .

[0115] For example, the projection of the first protrusion on the first wall 113 is in a square shape.

[0116] In the above scheme, along the thickness direction Z of the first wall 113 , the projection of the first protrusion on the first wall 113 is polygonal or elliptical, which can limit the rotation of the electrode lead-out member 13 relative to the first insulating member 14 and improve the positioning accuracy of the electrode lead-out member 13 and the first insulating member 14 .

[0117] According to some embodiments of the present application, the number of the first positioning portions 141 and the number of the second positioning portions 131 are both plural, and the first positioning portions 141 correspond to the second positioning portions 131 one by one.

[0118] The first positioning portions 141 correspond to the second positioning portions 131 one by one, and each first positioning portion 141 cooperates with one second positioning portion 131 .

[0119] The cooperation between the multiple first positioning portions 141 and the multiple second positioning portions 131 can realize the assembly of the electrode lead-out member 13 and the first insulating member 14 at multiple positions, and can limit the rotation of the electrode lead-out member 13 relative to the first insulating member 14, so that the first insulating member 14 has a higher positioning effect on the electrode lead-out member 13.

[0120] See also Figure 6 , and see further Figure 7 and Figure 8 , Figure 7 A schematic diagram of the structure of the electrode lead-out member provided in some embodiments of the present application, Figure 8 According to some embodiments of the present application, the first insulating member 14 includes a first surface 14a away from the first wall 113, the first positioning portion 141 is a first protrusion protruding from the first surface 14a, and the second positioning portion 131 is a first groove.

[0121] The first surface 14a is a surface of the first insulating member 14 that is away from the first wall 113. The first positioning portion 141 is a first protrusion protruding from the first surface 14a, that is, the first protrusion protrudes from the first surface 14a along the thickness direction Z of the first wall 113.

[0122] The second positioning portion 131 is a first groove provided in the electrode lead-out member 13. The first groove may be formed by a surface of the electrode lead-out member 13 close to the first insulating member 14 being recessed in a direction away from the first insulating member 14. The first groove may not penetrate the electrode lead-out member 13 along the thickness direction Z of the first wall 113, or the first groove may penetrate the electrode lead-out member 13 along the thickness direction Z of the first wall 113, for example, the first groove may be a structure similar to a through hole.

[0123] In the above solution, the matching structure of the first groove and the first protrusion is simple in structure, easy to process and easy to match.

[0124] According to some embodiments of the present application, Figure 6 As shown, along the thickness direction Z of the first wall 113 , the cross-sectional area of ​​the first protrusion gradually decreases from an end close to the first wall 113 to an end away from the first wall 113 .

[0125] The cross-sectional area of ​​the first protrusion refers to the area of ​​the first protrusion cut by a plane perpendicular to the thickness direction Z of the first wall 113 .

[0126] Along the thickness direction Z of the first wall 113, the cross-sectional area of ​​the first protrusion at the end away from the first wall 113 is the smallest. When the first protrusion is inserted into the first groove, the first protrusion can be guided into the first groove, making it easier for the first protrusion to enter the first groove, thereby reducing the difficulty of inserting the first protrusion into the first groove.

[0127] According to some embodiments of the present application, Figure 7 As shown, the first groove extends to the edge of the electrode lead-out member 13 .

[0128] The electrode lead-out member 13 includes a fifth surface 13a away from the first insulating member 14, a sixth surface 13b facing the first insulating member 14, and a side surface 13c, the fifth surface 13a and the sixth surface 13b are arranged opposite to each other along the thickness direction Z of the first wall 113, and the side surface 13c of the electrode lead-out member 13 connects the fifth surface 13a and the sixth surface 13b. The first groove is formed by the sixth surface 13b being recessed toward the fifth surface 13a.

[0129] The first groove extending to the edge of the electrode lead-out member 13 means that the first groove extends to the side surface 13 c of the electrode lead-out member 13 .

[0130] In the above solution, the first groove extends to the edge of the electrode lead-out member 13, which facilitates processing of the first groove from the edge of the electrode lead-out member 13 and reduces processing difficulty.

[0131] According to some embodiments of the present application, Figure 7 As shown, the first groove penetrates the electrode lead-out member 13 along the thickness direction of the electrode lead-out member 13 .

[0132] The thickness direction of the electrode lead-out member 13 may be parallel to the thickness direction Z of the first wall 113 .

[0133] The first groove penetrates the electrode lead-out member 13 along the thickness direction of the electrode lead-out member 13 , that is, the first groove extends from the sixth surface 13 b to the fifth surface 13 a along the thickness direction of the electrode lead-out member 13 .

[0134] In the above solution, the first groove passes through the electrode lead-out member 13 , which is convenient for processing and can reduce the weight of the electrode lead-out member 13 .

[0135] According to some embodiments of the present application, the first groove may not penetrate the electrode lead-out member 13 along the thickness direction of the electrode lead-out member 13 .

[0136] According to some embodiments of the present application, the height of the first protrusion protruding from the first surface 14a is H1, which satisfies 0.5 mm≤H1≤1.5 mm.

[0137] The height H1 of the first protrusion protruding from the first surface 14 a refers to the distance between the surface of the first protrusion away from the first surface 14 a and the first surface 14 a along the thickness direction Z of the first wall 113 .

[0138] Optionally, the height H1 of the first protrusion protruding from the first surface 14a may be 0.5 mm, 0.75 mm, 1 mm, 1.25 mm, 1.5 mm, etc.

[0139] The height H1 of the first protrusion protruding from the first surface 14a satisfies the above range, so that the first protrusion and the first groove have a good positioning effect. If the height H1 of the first protrusion protruding from the first surface 14a is less than 0.5mm, the positioning effect between the first groove and the first protrusion is poor; if the height H1 of the first protrusion protruding from the first surface 14a is greater than 1.5mm, the first protrusion occupies a large assembly space in the thickness direction Z of the first wall 113.

[0140] According to some embodiments of the present application, Figure 3 and Figure 7 As shown, the battery cell 10 also includes two electrode terminals 15 , which are disposed on the first wall 113 ; the electrode lead-out member 13 is provided with two first through holes 132 , which are respectively used to install the two electrode terminals 15 , and the second positioning portion 131 is located between the two first through holes 132 .

[0141] For the convenience of introduction, the two electrode terminals 15 mentioned here may be two positive electrode terminals, or may be two negative electrode terminals. It should be noted that the battery cell includes two positive electrode terminals and two negative electrode terminals, the two positive electrode terminals cooperate with one electrode lead-out member and one first insulating member, and the two negative electrode terminals cooperate with another electrode lead-out member and another first insulating member.

[0142] The two first through holes 132 correspond to the two electrode terminals 15 one by one, and each electrode terminal 15 is installed in one first through hole 132 .

[0143] like Figure 3 and Figure 7 As shown, the two first through holes 132 are spaced apart along the second direction Y, and the second direction Y may be the width direction of the battery cell 10 .

[0144] Optionally, the electrode terminal 15 may be cylindrical to facilitate processing and manufacturing. Correspondingly, the first through hole 132 may be a circular hole.

[0145] The second positioning portion 131 is located between the two first through holes 132 . The first insulating member 14 can position the electrode lead-out member 13 by cooperating with the second positioning portion 131 and the first positioning portion 141 , thereby reducing the machining accuracy of the first through holes 132 .

[0146] According to some embodiments of the present application, Figure 3 , Figure 6 and Figure 8 As shown, the first wall 113 includes a third positioning portion 1131 , and the first insulating member 14 includes a fourth positioning portion 142 . The third positioning portion 1131 cooperates with the fourth positioning portion 142 to position the first insulating member 14 .

[0147] The third positioning portion 1131 is a positioning structure on the first wall 113 , and the fourth positioning portion 142 is a positioning structure on the first insulating member 14 . The fourth positioning portion 142 is disposed corresponding to the third positioning portion 1131 , and the fourth positioning portion 142 can cooperate with the third positioning portion 1131 .

[0148] The third positioning portion 1131 cooperates with the fourth positioning portion 142 to facilitate positioning of the first wall 113 on the first insulating member 14 , thereby improving assembly efficiency.

[0149] According to some embodiments of the present application, Figure 6 and Figure 8 As shown, along the thickness direction Z of the first wall 113 , the area enclosed by the projection of the fourth positioning portion 142 on the first wall 113 at least partially overlaps with the projection of the first positioning portion 141 on the first wall 113 .

[0150] The area enclosed by the projection of the fourth positioning portion 142 on the first wall 113 is also the area enclosed by the projection outline of the fourth positioning portion 142 on the first wall 113. The area enclosed by the projection of the fourth positioning portion 142 on the first wall 113 at least partially overlaps with the projection of the first positioning portion 141 on the first wall 113, and the area enclosed by the projection of the fourth positioning portion 142 on the first wall 113 may partially overlap with the projection of the first positioning portion 141 on the first wall 113, or the area enclosed by the projection of the fourth positioning portion 142 on the first wall 113 may completely overlap with the projection of the first positioning portion 141 on the first wall 113.

[0151] In the above solution, the area enclosed by the fourth positioning portion 142 on the first wall 113 at least partially overlaps with the projection of the first positioning portion 141 on the first wall 113 , so that the structure of the first insulating member 14 is compact.

[0152] According to some embodiments of the present application, Figure 6 and Figure 8 As shown, along the thickness direction Z of the first wall 113 , the projection of the fourth positioning portion 142 on the first wall 113 falls within the projection of the first positioning portion 141 on the first wall 113 .

[0153] The projection of the fourth positioning portion 142 on the first wall 113 falls within the projection of the first positioning portion 141 on the first wall 113 , that is, along the thickness direction Z of the first wall 113 , the fourth positioning portion 142 overlaps with the first positioning portion 141 , making the structure of the first insulating member 14 more compact.

[0154] According to some embodiments of the present application, Figure 6 and Figure 8As shown, the first insulating member 14 includes a first surface 14a away from the first wall 113 and a second surface 14b facing the first wall 113, the first positioning portion 141 is disposed on the first surface 14a, and the fourth positioning portion 142 is disposed on the second surface 14b.

[0155] The first surface 14a and the second surface 14b are two surfaces opposite to each other in the thickness direction of the first insulating member 14, and the thickness direction of the first insulating member 14 may be parallel to the thickness direction Z of the first wall 113. The first positioning portion 141 is a positioning structure disposed on the first surface 14a, and the fourth positioning portion 142 is a positioning structure disposed on the second surface 14b.

[0156] In the above solution, the first positioning portion 141 and the fourth positioning portion 142 are respectively located on two opposite surfaces of the first insulating member 14 to facilitate the assembly of the first insulating member 14 with the electrode lead-out member 13 and the first wall 113 on opposite sides of the thickness direction Z of the first wall 113.

[0157] According to some embodiments of the present application, Figure 6 and Figure 8 As shown, the first wall 113 includes a third surface 113 a facing away from the interior of the battery cell 10 , the third positioning portion 1131 is a second protrusion protruding from the third surface 113 a , and the fourth positioning portion 142 is a second groove.

[0158] The second groove may have a variety of shapes, which are not limited in the present application. For example, the second groove may be an elongated circular groove, that is, the two ends of the second groove in the length direction are semicircular structures, and the middle section of the second groove is linear.

[0159] The first wall 113 also includes a fourth surface (not shown in the figure) facing the inside of the battery cell 10. The third surface 113a and the fourth surface are two surfaces opposite to each other in the thickness direction Z of the first wall 113. The third positioning portion 1131 protrudes from the third surface 113a, and the fourth positioning portion 142 is a second groove formed by being recessed in the second surface 14b. In the above scheme, the third positioning portion 1131 is a second protrusion, and the fourth positioning portion 142 is a second groove. The matching structure of the second protrusion and the second groove is simple in structure and easy to process.

[0160] According to some embodiments of the present application, Figure 6 As shown, the second groove penetrates the first insulating member 14 along the thickness direction of the first insulating member 14 .

[0161] The thickness direction of the first insulating member 14 may be parallel to the thickness direction Z of the first wall 113 .

[0162] The second groove penetrates the first insulating member 14 along the thickness direction of the first insulating member 14 , that is, the second groove extends from the second surface 14 b to the first surface 14 a along the thickness direction of the first insulating member 14 , that is, the second groove is a through hole.

[0163] The fourth positioning portion 142 is a through hole, and the third positioning portion 1131 is a second protrusion. The second protrusion cooperates with the through hole provided on the first insulating member 14 to achieve positioning of the first wall 113 on the first insulating member 14 .

[0164] In the above solution, the second groove passes through the first insulating member 14 , which is convenient for processing and can reduce the weight of the first insulating member 14 .

[0165] According to some embodiments of the present application, the height of the second protrusion protruding from the third surface 113a is H2, satisfying 0.3 mm≤H2≤1.5 mm.

[0166] The height H2 of the second protrusion protruding from the third surface 113 a refers to the distance between the surface of the second protrusion away from the third surface 113 a and the third surface 113 a along the thickness direction Z of the first wall 113 .

[0167] Optionally, the height H2 of the second protrusion protruding from the third surface 113a may be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, etc.

[0168] The height H2 of the second protrusion protruding from the third surface 113a satisfies the above range, so that the second protrusion and the second groove have a good matching effect. If the height H2 of the second protrusion protruding from the third surface 113a is less than 0.3mm, the positioning effect between the second groove and the second protrusion is poor; if the height H2 of the second protrusion protruding from the third surface 113a is greater than 1.5mm, the second protrusion occupies a large assembly space in the thickness direction Z of the first wall 113.

[0169] According to some embodiments of the present application, Figure 3 and Figure 8 As shown, the battery cell 10 also includes two electrode terminals 15, which are disposed on the first wall 113; the first insulating member 14 is provided with two second through holes 143, which are respectively used to install the two electrode terminals 15, and the fourth positioning portion 142 is located between the two second through holes 143.

[0170] The two second through holes 143 are arranged at intervals along the second direction Y. Optionally, the second through holes 143 may be round holes.

[0171] The two second through holes 143 correspond to the two electrode terminals 15 one by one, and each electrode terminal 15 is installed in one second through hole 143 .

[0172] The fourth positioning portion 142 is located between the two second through holes 143 . The fourth positioning portion 142 cooperates with the third positioning portion 1131 to achieve positioning of the first wall 113 on the first insulating member 14 , which can reduce the machining accuracy of the second through holes 143 .

[0173] According to some embodiments of the present application, Figure 3 As shown, the first wall 113 is provided with two electrode mounting holes 1132, the two electrode mounting holes 1132 are respectively used to mount two electrode terminals 15, the hole diameter of the electrode mounting hole 1132 is D1, and the hole diameter of the second through hole 143 is D2, satisfying D1 <D2。

[0174] It should be noted that the two electrode mounting holes mentioned here refer to holes for mounting two positive electrode terminals, or holes for mounting two negative electrode terminals. Correspondingly, the first wall 113 is provided with two other electrode mounting holes 1132 for mounting two electrode terminals 15 of opposite polarity to the two electrode terminals 15 mentioned above.

[0175] The two electrode mounting holes 1132 correspond to the two electrode terminals 15 one by one, and each electrode terminal 15 is mounted in one electrode mounting hole 1132. Figure 3 As shown, two electrode mounting holes 1132 are arranged at intervals along the second direction Y. Optionally, the electrode mounting holes 1132 may be round holes.

[0176] The aperture D1 of the electrode mounting hole 1132 and the aperture D2 of the second through hole 143 satisfy the above relationship, so that the processing accuracy of the second through hole 143 is relatively low. The first wall 113 can be positioned on the first insulating member 14 by cooperating with the fourth positioning portion 142 and the third positioning portion 1131 .

[0177] According to some embodiments of the present application, 0.5 mm ≤ D2 - D1 ≤ 1 mm is satisfied.

[0178] Optionally, the difference D2-D1 between the aperture D2 of the second through hole 143 and the aperture D1 of the electrode mounting hole 1132 may be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc.

[0179] The difference between the aperture D2 of the second through hole 143 and the aperture D1 of the electrode mounting hole 1132 satisfies the above relationship, and the electrode terminal 15 and the second through hole 143 have a certain assembly gap, which facilitates the assembly of the second through hole 143 and the electrode terminal 15. If the difference between the aperture D2 of the second through hole 143 and the aperture D1 of the electrode mounting hole 1132 is too small, the assembly difficulty of the electrode terminal 15 with the second through hole 143 and the electrode mounting hole 1132 increases, which is not conducive to the assembly of the second through hole 143 and the electrode terminal 15; if the difference between the aperture D2 of the second through hole 143 and the aperture D1 of the electrode mounting hole 1132 is too large, there is a large gap between the outer peripheral surface of the electrode terminal 15 and the hole wall of the second through hole 143, and the assembly effect of the first insulating member 14 and the electrode terminal 15 is poor.

[0180] See also Figure 3 , and see further Fig. 9 , Fig. 9 for Figure 4 According to some embodiments of the present application, Figure 3 As shown, the battery cell 10 further includes a seal 18 , which is sleeved on the electrode terminal 15 , and is disposed between the electrode terminal 15 and the electrode mounting hole 1132 .

[0181] The sealing member 18 is made of insulating material and can be a sealing ring to facilitate assembly with the electrode terminal 15 .

[0182] Optionally, the outer diameter of the partial seal 18 is smaller than the aperture of the electrode mounting hole 1132 , so that the partial seal 18 can be inserted into the electrode mounting hole 1132 following the electrode terminal 15 .

[0183] According to some embodiments of the present application, Figure 3 As shown, the housing 11 includes a shell 111 and a cover 112 , the shell 111 has an opening, the cover 112 closes the opening, and the first wall 113 is the cover 112 .

[0184] The first wall 113 is a cover 112 , which facilitates the assembly of the first insulating member 14 and the first wall 113 .

[0185] According to some embodiments of the present application, the first wall 113 is the wall with the largest area among all the walls of the battery cell 10 .

[0186] The battery cell 10 may be in a rectangular parallelepiped shape, and the first wall 113 is the wall with the largest area among all the walls of the battery cell 10. In other words, the large surface of the battery cell 10 is set as the first wall 113. The thickness direction Z of the first wall 113 may be the thickness direction of the battery cell 10.

[0187] According to some embodiments of the present application, the present application also provides a battery 100, such as Figure 2 As shown, the battery 100 includes a case 101, a busbar 20 and a plurality of battery cells 10. The busbar 20 is accommodated in the case 101. The plurality of battery cells 10 are stacked along the thickness direction Z of the first wall 113, and the electrode lead-out members 13 of the plurality of battery cells 10 are electrically connected through the busbar 20.

[0188] The busbar component 20 can connect the electrode lead-out pieces 13 of two adjacent battery cells 10, or the busbar component 20 can also connect the electrode lead-out pieces 13 of two battery cells 10 that are spaced apart. For example, one end of the busbar component 20 is connected to the electrode lead-out piece 13 of one battery cell 10, and the other end of the busbar component 20 is connected to the electrode lead-out piece 13 that is separated from the battery cell 10 by one or more battery cells 10.

[0189] According to the battery 100 of the embodiment of the present application, the busbar component 20 is electrically connected to the electrode lead-out member 13 to facilitate electrical connection between the plurality of battery cells 10 ; the use of the above-mentioned battery cells 10 improves the production efficiency of the battery 100 .

[0190] See also Figure 3 and Figure 7 , and see further Fig.10 , Fig.10 Schematic diagram of assembly of electrode lead-out member and first wall provided in some embodiments of the present application. According to some embodiments of the present application, Figure 3 and Figure 7 As shown, the battery cell 10 also includes an electrode assembly 12, which is accommodated in the outer shell 11, and the electrode assembly 12 has a pole ear 121; the electrode lead-out member 13 includes a first part 133 and a second part 134, the first part 133 is parallel to the first wall 113, the first part 133 is electrically connected to the pole ear 121, and the second part 134 is connected to the busbar component 20, and the plane where the connection surface between the second part 134 and the busbar component 20 is located intersects with the first wall 113.

[0191] The first part 133 and the second part 134 are two parts of the electrode lead-out member 13. The first part 133 is electrically connected to the tab 121, and the second part 134 is connected to the busbar 20, so as to realize the connection between the electrode lead-out member 13 and the tab 121 and the busbar 20 on different surfaces.

[0192] The first portion 133 is parallel to the first wall 113, that is, the thickness direction of the first portion 133 is parallel to the thickness direction Z of the first wall 113. When the first wall 113 is a component with a convex bulge, the first portion 133 is parallel to the relatively flat and larger portion of the first wall 113. The first portion 231 is parallel to the first wall 213, which means that the first portion 231 is arranged opposite to the first wall 213, or in other words, the largest surface of the first portion 231 is arranged opposite to the first wall 213, and does not mean that both surfaces of the first portion 231 arranged along the thickness direction Z of the first wall 213 are parallel to the first wall 213.

[0193] The plane where the connection surface 13d of the second portion 134 and the busbar component 20 is located intersects with the first wall 113. For example, the angle θ between the plane where the connection surface 13d of the second portion 134 and the busbar component 20 is located and the first wall 113 is 60 degrees to 120 degrees. Preferably, the angle θ between the plane where the connection surface 13d of the second portion 134 and the busbar component 20 is located and the first wall 113 is 85 degrees to 95 degrees. Preferably, the connection surface 13d of the second portion 134 and the busbar component 20 may be perpendicular to the first wall 113. The battery cell 10 also includes a converter 16, and the first portion 133 is electrically connected to the pole lug 121. The first portion 133 may be electrically connected to the pole lug 121 through the electrode terminal 15 and the converter 16. For example, as Fig. 9 As shown, the tab 121 is connected to the adapter 16 , the adapter 16 is connected to the electrode terminal 15 , and the electrode terminal 15 is connected to the first portion 133 , thereby achieving electrical connection between the tab 121 and the first portion 133 .

[0194] The battery 100 further includes a second insulating member 17 , which is disposed between the first wall and the adapter 16 to insulate and isolate the first wall and the adapter 16 .

[0195] In the above solution, the plane where the connection surface between the second portion 134 and the busbar component 20 is located intersects with the first wall 113 , so as to realize the connection between the electrode lead-out member 13 and the busbar component 20 .

[0196] The second portion 134 and the first portion 133 are sequentially arranged along the first direction X, and the connecting surface 13 d is a surface of the electrode lead-out member 13 in the first direction X that is closest to the edge of the first wall 113 .

[0197] According to some embodiments of the present application, the second positioning portion 131 is disposed on the first portion 133 .

[0198] The second positioning portion 131 is disposed on the first portion 133 to facilitate the assembly of the electrode lead-out member 13 and the first insulating member 14 , and at the same time, facilitate the electrical connection between the first portion 133 and the electrode tab 121 .

[0199] According to some embodiments of the present application, Figure 7 and Fig. 9 As shown, the second part 134 includes a first section 1341, a second section 1342 and a third section 1343, the first section 1341 extends from the first part 133 in a direction away from the first wall 113, the second section 1342 connects the first section 1341 and the third section 1343 at an end of the first section 1341 away from the first wall 113, the third section 1343 extends from the second section 1342 in a direction close to the first wall 113, and the conduit component 20 is connected to the side of the third section 1343 away from the first section 1341.

[0200] The first section 1341 is connected to the first part 133, the second section 1342 is connected to the third section 1343 and the first section 1341, and the third section 1343 is used to connect with the third section 1343. The structure is simple, and the second part 134 can be bent into shape.

[0201] When the first portion 133 and the second portion 134 are integrally formed, the electrode lead-out member 13 may be a bent structure so that the second portion 134 can be deformed to absorb expansion stress. For example, during the use of the battery 100, the battery cell 10 expands the housing 11 due to internal pressure or temperature increase, and the electrode lead-out member 13 can be deformed to absorb the expansion stress.

[0202] The second portion 134 may be U-shaped to facilitate processing and manufacturing.

[0203] According to some embodiments of the present application, Figure 8 and Fig. 9 As shown, the first insulating member 14 includes a main body 144 and a protrusion 145. The main body 144 is arranged between the electrode lead-out member 13 and the first wall 113. The protrusion 145 protrudes from the main body 144 along the thickness direction Z of the first wall 113. The protrusion 145 is inserted between the first section 1341 and the third section 1343. The first positioning portion 141 is arranged on the main body 144.

[0204] Optionally, the protrusion 145 may protrude from the body 144 along the thickness direction Z of the first wall 113 toward a side away from the interior of the battery cell 10 .

[0205] In the above solution, the protrusion 145 is inserted between the first section 1341 and the third section 1343 to support the third section 1343 so as to facilitate welding of the third section 1343 and the collector component 20 .

[0206] According to some embodiments of the present application, Fig. 9As shown, the housing 11 further has a second wall 114 disposed opposite to the first wall 113 , and the edge of the second wall 114 is recessed to form a recess 1141 , which is used to accommodate the electrode lead-out member 13 of the battery cell 10 adjacent to the second wall 114 .

[0207] The second wall 114 and the first wall 113 are two walls of the housing 11 that are disposed opposite to each other along the thickness direction Z of the first wall 113 .

[0208] The edge of the second wall 114 is recessed toward the first wall 113 along the thickness direction Z of the first wall 113 to form a recessed portion 1141 . The recessed depth of the recessed portion 1141 is greater than the height of the electrode lead-out member 13 protruding from the first wall 113 .

[0209] An insulating layer may be provided on the surface of the second wall 114 so that when a plurality of battery cells 10 are stacked, the second wall 114 is insulated and isolated from the electrode lead-out members 13 of adjacent battery cells 10 .

[0210] In the above solution, when multiple battery cells 10 are stacked, the recess 1141 can accommodate the electrode lead-out member 13 of the battery cell 10 adjacent to the second wall 114, making rational use of the assembly space so that the battery 100 has a higher energy density.

[0211] According to some embodiments of the present application, the present application further provides an electrical device, which includes the battery cell 10 provided by any of the above embodiments, and the battery cell 10 is used to provide electrical energy.

[0212] The electrical equipment may be any of the aforementioned devices or systems using the battery cell 10 .

[0213] According to some embodiments of this application, please refer to Figures 2 to 9The present application provides a battery cell 10, which is a flat rectangular parallelepiped. The battery cell 10 includes a shell 11, an electrode assembly 12, an electrode lead-out member 13, a first insulating member 14, an electrode terminal 15, a transition member 16, a second insulating member 17, and a sealing member 18. The shell 11 includes a shell 111 and a cover 112. The shell 111 has an opening, and the cover 112 closes the opening. The cover 112 is a first wall 113. The electrode assembly 12 is disposed in the shell 111, and the electrode assembly 12 has a pole ear 121. The electrode lead-out member 13 is located on the side of the first wall 113 away from the inside of the battery cell 10. The electrode lead-out member 13 includes a first part 133 and a second part 134. The first part 133 is provided with a second positioning portion 131. The second part 134 and the first part 133 are sequentially arranged along the first direction X. The first direction X can be the length direction of the battery cell 10; the side of the second part 134 away from the first part 133 is used to connect with the current collecting component 20. The first insulating member 14 is disposed between the first wall 113 and the electrode lead-out member 13 to insulate and isolate the first wall 113 from the electrode lead-out member 13 .

[0214] The electrode lead-out member 13 includes a fifth surface 13a facing away from the first insulating member 14 and a sixth surface 13b facing the first insulating member 14. The second positioning portion 131 is a first groove arranged on the sixth surface 13b. The first groove is formed by the sixth surface 13b being recessed in a direction away from the first insulating member 14, and the first groove penetrates the electrode lead-out member 13 along the thickness direction Z of the first wall 113.

[0215] The first insulating member 14 includes a first surface 14a away from the first wall 113 and a second surface 14b facing the first wall 113. The first insulating member 14 includes a first positioning portion 141 and a fourth positioning portion 142. The first positioning portion 141 is a first protrusion protruding from the first surface 14a, and the fourth positioning portion 142 is a second groove disposed on the second surface 14b. The first protrusion is inserted into the first groove to position the electrode lead-out member 13.

[0216] The first wall 113 includes a third surface 113a facing away from the interior of the battery cell 10 and a fourth surface facing the interior of the battery cell 10. The first wall 113 includes a third positioning portion 1131, which is a second protrusion protruding from the third surface 113a. The second protrusion is inserted into the second groove to position the first insulating member 14.

[0217] The battery cell 10 provided in the embodiment of the present application cooperates with the first positioning portion 141 and the second positioning portion 131 to facilitate the positioning of the first insulating member 14 on the electrode lead-out member 13; and cooperates with the third positioning portion 1131 and the fourth positioning portion 142 to facilitate the positioning of the first wall 113 on the first insulating member 14, thereby facilitating positioning and assembly and improving the production efficiency of the battery cell 10.

[0218] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, characterized in that: include: a housing including a first wall; An electrode lead-out member, at least partially disposed on a side of the first wall away from the interior of the battery cell, for leading out electrical energy from the battery cell; A first insulating member, at least partially disposed between the first wall and the electrode lead-out member to insulate and isolate the first wall from the electrode lead-out member; Wherein, the first insulating member includes a first positioning portion, the electrode lead-out member includes a second positioning portion, and the first positioning portion cooperates with the second positioning portion to position the electrode lead-out member; The first wall includes a third positioning portion, the first insulating member includes a fourth positioning portion, and the third positioning portion cooperates with the fourth positioning portion to position the first insulating member.

2. The battery cell according to claim 1, characterized in that: One of the first positioning portion and the second positioning portion is a first protrusion, and the other of the first positioning portion and the second positioning portion is a first groove.

3. The battery cell according to claim 2, characterized in that: Along the thickness direction of the first wall, the projection of the first protrusion on the first wall is polygonal or elliptical.

4. The battery cell according to claim 1, characterized in that: The number of the first positioning parts and the number of the second positioning parts are both plural, and the first positioning parts correspond to the second positioning parts one by one.

5. The battery cell according to claim 2, characterized in that: The first insulating member includes a first surface facing away from the first wall, the first positioning portion is a first protrusion protruding from the first surface, and the second positioning portion is a first groove.

6. The battery cell according to claim 5, characterized in that: Along the thickness direction of the first wall, the cross-sectional area of ​​the first protrusion gradually decreases from an end close to the first wall to an end far away from the first wall.

7. The battery cell according to claim 5, characterized in that: The first groove extends to an edge of the electrode lead-out member.

8. The battery cell according to claim 5, characterized in that: The first groove penetrates the electrode lead-out member along a thickness direction of the electrode lead-out member.

9. The battery cell according to claim 5, characterized in that: A height of the first protrusion protruding from the first surface is H1, which satisfies 0.5 mm≤H1≤1.5 mm.

10. The battery cell according to claim 1, characterized in that: The battery cell further comprises: two electrode terminals, disposed on the first wall; The electrode lead-out member is provided with two first through holes, the two first through holes are respectively used to install the two electrode terminals, and the second positioning portion is located between the two first through holes.

11. The battery cell according to claim 1, characterized in that: Along the thickness direction of the first wall, an area enclosed by the projection of the fourth positioning portion on the first wall at least partially overlaps with the projection of the first positioning portion on the first wall.

12. The battery cell according to claim 11, characterized in that: Along the thickness direction of the first wall, a projection of the fourth positioning portion on the first wall falls within a projection of the first positioning portion on the first wall.

13. The battery cell according to claim 1, characterized in that: The first insulating member includes a first surface facing away from the first wall and a second surface facing the first wall. The first positioning portion is disposed on the first surface, and the fourth positioning portion is disposed on the second surface.

14. The battery cell according to claim 1, characterized in that: The first wall includes a third surface facing away from the interior of the battery cell, the third positioning portion is a second protrusion protruding from the third surface, and the fourth positioning portion is a second groove.

15. The battery cell according to claim 14, characterized in that: The second groove penetrates the first insulating member along a thickness direction of the first insulating member.

16. The battery cell according to claim 14, characterized in that: A height of the second protrusion protruding from the third surface is H2, which satisfies 0.3 mm ≤ H2 ≤ 1.5 mm.

17. The battery cell according to claim 1, characterized in that: The battery cell further comprises: two electrode terminals, disposed on the first wall; The first insulating member is provided with two second through holes, the two second through holes are respectively used to install the two electrode terminals, and the fourth positioning portion is located between the two second through holes.

18. The battery cell according to claim 17, characterized in that: The first wall is provided with two electrode mounting holes, the two electrode mounting holes are used to mount the two electrode terminals respectively, the hole diameter of the electrode mounting hole is D1, and the hole diameter of the second through hole is D2, satisfying D1 <D2。 19. The battery cell according to claim 18, characterized in that: Satisfies 0.5mm≤D2-D1≤1mm.

20. The battery cell according to claim 1, characterized in that The housing comprises a shell and a cover, the shell has an opening, the cover closes the opening, and the first wall is the cover.

21. The battery cell according to any one of claims 1 to 20, characterized in that: The first wall is a wall having the largest area among all the walls of the battery cell.

22. A battery, characterized in that: include: Box; A confluence component is contained in the box; A plurality of battery cells as described in any one of claims 1 to 21 are accommodated in the box body, the plurality of battery cells are stacked along the thickness direction of the first wall, and the electrode lead-out members of the plurality of battery cells are electrically connected through the busbar component.

23. The battery according to claim 22, characterized in that The battery cell further comprises an electrode assembly, the electrode assembly is accommodated in the housing, and the electrode assembly has a tab; The electrode lead-out member includes a first part and a second part, the first part is parallel to the first wall, the first part is electrically connected to the electrode tab, the second part is connected to the busbar component, and the plane where the connection surface of the second part and the busbar component lies intersects with the first wall.

24. The battery according to claim 23, characterized in that The second positioning portion is disposed on the first portion.

25. The battery according to claim 23, characterized in that The second part includes a first section, a second section and a third section, the first section extends from the first part in a direction away from the first wall, the second section connects the first section and the third section at an end of the first section away from the first wall, the third section extends from the second section in a direction close to the first wall, and the conduit component is connected to a side of the third section away from the first section.

26. The battery according to claim 25, characterized in that The first insulating member includes a body and a protrusion, the body is arranged between the electrode lead-out member and the first wall, the protrusion protrudes from the body along the thickness direction of the first wall, the protrusion is inserted between the first section and the third section, and the first positioning portion is arranged on the body.

27. The battery according to any one of claims 22 to 26, characterized in that The housing further comprises a second wall disposed opposite to the first wall, and an edge of the second wall is recessed to form a concave portion, and the concave portion is used to accommodate the electrode lead-out member of the battery cell adjacent to the second wall.

28. An electrical equipment, characterized in that: The invention comprises a battery cell as claimed in any one of claims 1 to 21, wherein the battery cell is used to provide electrical energy.

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