Battery monomer, battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery monomer, a battery device and electric equipment. In the embodiment of the invention, the matching piece and the matching hole which are matched in an inserting manner are arranged, so that the electrode terminal and the adapter are connected in an inserting manner, meanwhile, the matching piece is configured to comprise the main body part and the elastic part, and after the matching piece is inserted into the matching hole, the elastic part can be propped against the hole wall of the matching hole by utilizing the elasticity of the elastic part; and the plugging reliability of the matching piece and the matching hole is further improved, so that the electric connection reliability of the electrode terminal and the adapter piece is improved, and the electric connection reliability of the battery monomer is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to battery cells, battery devices, and electrical equipment. Background Art

[0002] In a battery device, the current flow between the electrode assembly of a battery cell and other components needs to be transmitted through intermediate media such as adapter parts and electrode terminals. However, the electrical connection reliability of the battery cell needs to be improved. Summary of the Utility Model

[0003] Based on this, the present application provides a battery cell, a battery device, and electrical equipment, which can improve the electrical connection reliability of the battery cell.

[0004] In a first aspect, the present application provides a battery cell, including a housing, an electrode assembly, an electrode terminal, and an adapter part. The electrode assembly is disposed inside the housing, the electrode terminal is disposed on the housing, and the electrode assembly is electrically connected to the electrode terminal by means of the adapter part. Wherein, one of the electrode terminal and the adapter part is provided with a fitting part, and the other is provided with a fitting hole. Define the one of the electrode terminal and the adapter part that is provided with the fitting part as the first target part, and the other that is provided with the fitting hole as the second target part. The fitting part includes a main body part connected to the first target part and an elastic part connected to the main body part. Both the main body part and the elastic part are inserted into the fitting hole, and the elastic part abuts against the hole wall of the fitting hole. The electrode terminal and the adapter part are connected by means of the fitting part and the fitting hole.

[0005] In the technical solution of the embodiment of the present application, by providing the fitting part and the fitting hole that are inserted and matched, the electrode terminal and the adapter part are fixedly connected by an insertion method. At the same time, by configuring the fitting part to include a main body part and an elastic part, after the fitting part is inserted into the fitting hole, the elastic part can be made to abut against the hole wall of the fitting hole by using the elasticity of the elastic part, further improving the insertion reliability of the fitting part and the fitting hole, thereby improving the electrical connection reliability of the electrode terminal and the adapter part, and further improving the electrical connection reliability of the battery cell. Compared with the method of electrically connecting the electrode terminal and the adapter part by welding, it can not only improve the situation where the electrode terminal and the adapter part are poorly electrically connected due to poor welding resulting in false soldering, but also improve the situation where metal dust, welding slag particles, etc. generated during the welding process fall into the interior of the battery cell, thereby improving the yield and reliability of the battery cell.

[0006] In some embodiments, the elastic part and the main body part define a deformable space.

[0007] In this way, not only can the elastic part abut against the hole wall of the fitting hole by means of the deformable space, but also during the process of inserting the fitting part into the fitting hole, the elastic part can be deformed in response to the abutment of the hole wall of the fitting hole, which is beneficial to the insertion and matching of the fitting part.

[0008] In some embodiments, the elastic portion has a first end connected to the main body portion, and a second end disposed opposite to the first end; the second end is configured as a free end.

[0009] Since the second end of the elastic part is a free end, the part of the elastic part other than the first end can be deformed more freely when subjected to a force, thereby being more conducive to plugging in the mating part.

[0010] In some embodiments, the second end is closer to the main body than the first end and is connected to an end of the first target component.

[0011] In this way, since the second end of the elastic part is closer to one end of the main body connected to the first target part, during the process of inserting the matching part into the matching hole, the first end of the elastic part enters the matching hole before the second end, so that the part of the elastic part except the first end can be deformed under the abutment of the hole wall of the matching hole, thereby making the process of the elastic part entering the matching hole smoother.

[0012] In some embodiments, the first end of the elastic portion is connected to an end of the main body portion facing away from the first target component.

[0013] This not only further facilitates the insertion of the elastic part into the matching hole, but also helps to reduce the space occupied by the matching hole.

[0014] In some embodiments, the direction from the first end to the second end is set at a preset angle with the opening direction of the mating hole, and the preset angle is greater than 0° and less than 90°; and / or, in the initial state, the elastic part extends in a straight line direction from the first end to the second end; and / or, the elastic part is constructed as a sheet-like component.

[0015] By controlling the preset angle, it is not only helpful for the elastic part to enter the matching hole, but also helpful to make the elastic part abut against the hole wall of the matching hole by means of the deformation of the elastic part. By setting the elastic part in the initial state to extend in a straight line from the first end to the second end, it is not only convenient to manufacture the elastic part, but also helpful to transmit the force more efficiently. By constructing the elastic part as a sheet component, it is not only convenient to process and manufacture, but also makes the elastic part have multi-directional elastic deformation ability, which is beneficial for the elastic part to produce elastic deformation under the action of the force, thereby facilitating the insertion of the matching piece and improving the insertion tightness of the matching piece.

[0016] In some embodiments, a portion of the main body is snap-fitted with the mating hole, and another portion is connected to the elastic portion, and there is a gap between the mating piece and the hole wall of the mating hole; the elastic portion is accommodated in the gap and abuts against the hole wall of the mating hole.

[0017] Thus, since a part of the main body portion is snap-fitted with the mating hole and the other part is in a relatively fixed state under the elastic action of the elastic portion, the insertion fastening property of the fitting is further improved.

[0018] In some embodiments, the mating hole has a first hole section and a second hole section that communicate with each other along the opening direction of the mating hole. One side of the first hole section facing away from the second hole section defines an opening of the mating hole; the main body portion includes a first main body section connected to the first target member, and a second main body section connected to one end of the first main body section facing away from the first target member; the second main body section is connected to the elastic portion; the first main body section is snap-fitted with the first hole section via the opening; the second main body section is located in the second hole section and has a gap with the hole wall of the second hole section.

[0019] Thus, since the second main body section of the main body portion is deeper into the mating hole than the first main body section and the elastic portion is connected to the second main body section, during the process of inserting the fitting into the mating hole, the elastic portion can enter the mating hole first following the second main body section, and the elastic portion can deform in response to the abutment of the hole wall of the mating hole, which is conducive to the fitting being inserted into the mating hole more smoothly. At the same time, since there is a gap between the second main body section and the hole wall of the second hole section, when the elastic portion enters the second hole section, the elastic portion is received in this gap, and the insertion fastening property of the fitting is improved by the abutment of the elastic portion with the hole wall of the second hole section.

[0020] In some embodiments, along the direction perpendicular to the opening direction of the mating hole, the maximum dimension of the first hole section is smaller than the minimum dimension of the second hole section.

[0021] After the elastic portion enters the second hole section via the first hole section, a part of the deformation acting force accumulated by the elastic portion in the first hole section is released in the second hole section, and the other part that is not released can make the elastic portion abut against the hole wall of the second hole section. In this way, it is difficult for the elastic portion to enter the first hole section from the second hole section. Thus, it is beneficial to improve the situation where the fitting comes out of the mating hole.

[0022] In some embodiments, the connection between the hole wall of the first hole section and the hole wall of the second hole section defines a stepped portion; the elastic portion abuts against the stepped portion.

[0023] Thus, under the abutment of the stepped portion, the elastic portion can be blocked from entering the first hole section, which is not only beneficial to further improving the situation where the fitting comes out of the mating hole, but also beneficial to further improving the insertion fastening property of the fitting and improving the situation where the fitting becomes loose.

[0024] In some embodiments, the main body portion has a first side and a second side that are oppositely arranged along the direction perpendicular to the opening direction of the mating hole, and at least one of the first side and the second side is provided with an elastic portion; on the side provided with the elastic portion, the first main body section protrudes relative to the second main body section.

[0025] In this way, the second main body section is recessed relative to the first main body section, thereby further increasing the deformable space defined between the elastic portion and the main body portion, thereby making it easier for the fitting to enter the first hole section, further facilitating the insertion of the fitting into the fitting hole.

[0026] In some embodiments, one of the first side and the second side is provided with an elastic portion; and on the side without the elastic portion, the second main body segment abuts against the hole wall of the second hole segment.

[0027] In this way, not only can the space occupied by the matching hole be reduced, but the plug-in fastening of the matching piece can also be further enhanced.

[0028] In some embodiments, there are multiple mating parts and mating holes, and all mating parts and all mating holes are arranged one by one; all mating parts are arranged around the first axis, and the extension direction of the first axis and the opening direction of the mating holes are parallel to each other.

[0029] Since the plug-in fitting part is arranged around the first axis, it can not only resist external forces in multiple directions and improve the tightness of the plug-in fitting, but also facilitate the use of limited space to achieve plug-in connection.

[0030] In some embodiments, all elastic parts are arranged on the side of the corresponding main body facing the first axis; or, all elastic parts are arranged on the side of the corresponding main body away from the first axis; or, among all elastic parts, there are elastic parts arranged on the side of the corresponding main body facing the first axis, and elastic parts arranged on the side of the corresponding main body away from the first axis.

[0031] In the case where all elastic parts are arranged on the side of the corresponding main part facing the first axis, not only can the space defined by the plug-in fitting part be more fully utilized to make the overall structure more compact, but also the risk of the first target part being deformed by the elastic part due to collision can be reduced during production and transportation. In the case where all elastic parts are arranged on the side of the corresponding main part away from the first axis, elastic parts of different structures can be arranged in the space outside the space defined by the plug-in fitting part, so as to further improve the plug-in tightness of the fitting. In the case where there are elastic parts arranged on the side of the corresponding main part facing the first axis and elastic parts arranged on the side of the corresponding main part away from the first axis among all elastic parts, not only can the space of each part on the relevant parts be fully utilized, but also elastic parts of different structures can be arranged in the space outside the space defined by the plug-in fitting part, so as to further improve the plug-in tightness of the fitting.

[0032] In some embodiments, three matching pieces and three matching holes are provided; and / or, all matching pieces are arranged at equal intervals around the first axis.

[0033] Thus, by setting three mating pieces and three mating holes, a triangular plug-in structure can be formed, which is more conducive to improving the plug-in stability and tightness of the mating piece, thereby further improving the shaking or loosening of the mating piece. By arranging all the mating pieces at equal intervals around the first axis, it is not only helpful to complete the plug-in process more smoothly during the insertion of the mating piece into the mating hole, improving the situation where the mating piece is difficult to plug in and damaged due to excessive local force, but also conducive to achieving a more stable connection structure.

[0034] In some embodiments, a first protrusion is provided on the side of the second target part facing the first target part, and the first protrusion has a first surface set toward the first target part; the mating hole extends from the first surface in a direction away from the first target part; and the first surface and the opposite side of the first target part abut against each other.

[0035] Thus, by providing the first convex portion, it is not only beneficial to improve the structural strength of the second target part, but also beneficial to provide a longer matching hole, increase the contact area between the matching part and the hole wall of the matching hole, thereby making the plug-in fit between the matching part and the matching hole more secure, and further reducing the possibility of the matching part becoming loose or falling off. At the same time, by abutting the first surface and the side of the first target part opposite to each other, not only the space occupied inside the battery cell is reduced, but also the reliability of the connection between the electrode terminal and the adapter and the current carrying capacity can be improved.

[0036] In some embodiments, the first target part has a second protrusion disposed toward the second target part, and the second protrusion has a second surface disposed toward the second target part; the mating part is disposed on the second surface; and the second surface and the opposite side of the second target part abut against each other.

[0037] Thus, by providing the second convex portion, it is not only beneficial to improve the structural strength of the first target part, but also beneficial to improve the space utilization rate inside the battery cell. At the same time, by abutting the second surface and the side of the second target part opposite to each other, it is not only beneficial to reduce the space inside the battery cell, but also to improve the reliability of the connection between the electrode terminal and the adapter and improve the current capacity.

[0038] In some embodiments, a mating piece is provided on the adapter and a mating hole is provided on the electrode terminal; the adapter has a recessed portion on the side facing away from the electrode terminal and is recessed toward the electrode terminal, and the second protrusion is located on the side of the adapter facing the electrode terminal, and the second protrusion is defined by the recessed portion.

[0039] This helps reduce the space occupied by the adapter inside the battery cell, thereby helping to improve the energy density of the battery cell.

[0040] In some embodiments, the elastic part and the main body part are integrally formed parts.

[0041] Thus, by configuring the elastic part and the main body part as integrally formed parts, there is no connection interface between the two. This can not only improve the looseness, separation and other situations that may occur at the connection part, improve the connection strength, but also facilitate the manufacturing and forming.

[0042] In some embodiments, the fitting part and the first target part are integrally formed parts.

[0043] Thus, by configuring the fitting part and the first target part as integrally formed parts, there is no connection interface between the two. This can not only improve the looseness, separation and other situations that may occur at the connection part, improve the connection strength, but also facilitate the manufacturing and forming.

[0044] In a second aspect, the present application provides a battery device, including the battery cell in any of the above embodiments.

[0045] The battery device also has the advantages possessed by the battery cell in any of the above embodiments, which will not be elaborated here.

[0046] In a third aspect, the present application provides an electrical equipment, including the battery device in any of the above embodiments.

[0047] The electrical equipment also has the advantages possessed by the battery device in any of the above embodiments, which will not be elaborated here.

[0048] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] By reading the detailed description of the following embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the embodiments and are not considered as a limitation to the present application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0050] Figure 1 is a schematic structural diagram of a vehicle in some embodiments of the present application;

[0051] Figure 2 is an exploded structural diagram of a battery device in some embodiments of the present application;

[0052] Figure 3 is an exploded structural diagram of a battery cell in some embodiments of the present application;

[0053] Figure 4 Schematic cross-sectional structure diagram of a partial structure of a battery cell in some embodiments of the present application;

[0054] Figure 5 Schematic partial structure diagram of an electrode terminal and an adapter cooperating with each other in some embodiments of the present application;

[0055] Figure 6 Is Figure 5 Schematic enlarged partial structure diagram at position A in

[0056] Figure 7 Schematic cross-sectional structure diagram of a partial structure of a battery cell in some other embodiments of the present application;

[0057] Figure 8 Is Figure 7 Schematic three-dimensional structure diagram of the adapter shown;

[0058] Figure 9 Is Figure 7 Schematic cross-sectional structure diagram of the electrode terminal shown in

[0059] Figure 10 Schematic structure diagram of a fitting in some embodiments of the present application;

[0060] Figure 11 Schematic structure diagram of a fitting in some other embodiments of the present application;

[0061] Figure 12 Schematic structure diagram of a fitting in some other embodiments of the present application;

[0062] Figure 13 Schematic structure diagram of a fitting in some further embodiments of the present application;

[0063] Figure 14 Schematic structure diagram of a mating hole in some embodiments of the present application;

[0064] Figure 15 Schematic cross-sectional structure diagram of a fitting and a mating hole cooperating with each other in some other embodiments of the present application;

[0065] Figure 16 Schematic three-dimensional structure diagram of an adapter in some embodiments of the present application;

[0066] Figure 17 Schematic structure diagram of an electrode terminal in some embodiments of the present application;

[0067] Figure 18 Schematic cross-sectional structure diagram of a partial structure of a battery cell in some other embodiments of the present application;

[0068] Figure 19Schematic perspective view of the adapter in some other embodiments of the present application.

[0069] Description of reference numerals:

[0070] Vehicle 1;

[0071] Battery device 10, controller 20, motor 30;

[0072] Battery cell 100, housing 110, housing body 111, end cap 112, electrode assembly 120, electrode terminal 130, adapter 140, fitting P1, main body part P11, first side c1, second side c2, first main section Z1, second main section Z2, elastic part P12, first end e1, second end e2, deformable space E, fitting hole P2, first hole section K1, opening u, second hole section K2, step part J, limiting part X, interval g, first convex part T1, first surface b1, second convex part T2, second surface b2, recessed part W;

[0073] Box body 200, first part 210, second part 220;

[0074] First aperture d1, second aperture d2, first thickness d3, second thickness d4, third thickness d5, first length d6, preset angle α, preset direction Y, first axis L1;

[0075] First direction F1, second direction F2, third direction F3. Detailed implementation manners

[0076] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill 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" and any variations thereof in the specification and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion.

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

[0079] Reference to "embodiments" in this document means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0080] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally represents an "or" relationship between the associated objects before and after.

[0081] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0082] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0083] In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside 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 this application can be understood according to specific circumstances.

[0084] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more widespread. Power batteries are not only applied to energy storage power systems such as hydroelectric, thermal, wind, and solar power stations, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0085] In the related art, the electrode terminal of a battery cell is electrically connected to an electrode assembly by means of an adapter, and a laser welding process is usually used to connect the electrode terminal and the adapter. However, in this process, not only is it easy to have a situation of poor welding due to insufficient penetration depth, which affects the reliability of the electrical connection between the adapter and the electrode terminal, but also impurities such as metal dust and welding slag particles are easily generated. If these impurities fall into the interior of the battery cell, it will affect the yield and reliability of the battery cell.

[0086] Based on this, in order to improve the reliability of the battery cell, the embodiments of the present application provide a battery cell. By changing the connection method between the adapter and the electrode terminal, the reliability of the electrical connection between the adapter and the electrode terminal is improved, thereby improving the reliability of the battery cell. Specifically, by configuring the connection method between the adapter and the electrode terminal as a plug-in method and making there be an elastic abutting force between the two, the connection tightness and reliability between the adapter and the electrode terminal are improved, thereby improving the reliability of the electrical connection between the adapter and the electrode terminal, and further improving the reliability of the battery cell.

[0087] The battery cell disclosed in the embodiments of the present application can be but is not limited to being used in electrical equipment such as vehicles, ships or aircraft. A power supply system of the electrical equipment can be formed by using the battery cell disclosed in the present application and some other components. In this way, it is beneficial to improve the reliability of the overall device.

[0088] The embodiments of the present application provide an electrical equipment using a battery device including a battery cell as a power supply. The electrical equipment is a device that uses electrical energy as an energy source and realizes corresponding functions by consuming electrical energy. Exemplarily, the electrical equipment can be but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecrafts, etc. Among them, the electric toy can include fixed or mobile electric toys. For example, game consoles, electric vehicle toys, electric ship toys, electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.

[0089] The electrical equipment of the embodiments of the present application may include a device main body and a power supply device. The power supply device is used to supply power to the device main body, and the power supply device may include a battery cell or a battery pack. The device main body refers to the main structure that consumes electrical energy to realize corresponding functions. For example, if the electrical equipment is a mobile phone, the device main body is the part that can realize functions such as communication, and power is supplied to the part that can realize functions such as communication through the battery cell or the battery pack. For example, if the electrical equipment is a car, the device main body is the part that can carry people and drive on the road, and power is supplied to the part that can carry people and drive on the road through the battery cell or the battery pack. The power supply device refers to a device that can output electrical energy. Exemplarily, electrical energy can be output through a battery pack composed of battery cells.

[0090] For the convenience of description, in the following embodiments, a power-consuming device in an embodiment of the present application is taken as an example of a vehicle for illustration.

[0091] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle 1 in some embodiments of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery device 10 is disposed inside the vehicle 1. The battery device 10 can be disposed at the bottom, head, or tail of the vehicle 1. The battery device 10 can be used for power supply of the vehicle 1. For example, the battery device 10 can be used as an operating power source of the vehicle 1. The vehicle 1 may further include a controller 20 and a motor 30. The controller 20 is used to control the battery device 10 to supply power to the motor 30. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1.

[0092] In some embodiments of the present application, the battery device 10 can not only be used as an operating power source of the vehicle 1, but also be used as a driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0093] To meet different power usage requirements, the battery device 10 may include a plurality of battery cells 100. A battery cell 100 refers to the smallest unit that makes up a battery module or a battery pack. The plurality of battery cells 100 can be connected in series and / or in parallel via electrode terminals for various application scenarios. The battery mentioned in the present application includes a battery module or a battery pack. Among them, the plurality of battery cells 100 can be connected in series, in parallel, or in a series-parallel combination. A series-parallel combination means a combination of series and parallel connections. The battery device 10 can also be referred to as a battery pack. In the embodiments of the present application, the plurality of battery cells 100 can directly form a battery pack, or can first form a battery module, and then the battery module forms a battery pack.

[0094] Please refer to Figure 2 , Figure 2 which is an exploded structural diagram of the battery device 10 in some embodiments of the present application. Figure 2In this case, the battery device 10 may include a plurality of battery modules and a housing 200, and the plurality of battery modules are accommodated inside the housing 200. The housing 200 is used to accommodate the battery cells 100 to prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells 100. The housing 200 may be a simple three-dimensional structure such as a single cuboid, cylinder or sphere, or a complex three-dimensional structure composed of a combination of simple three-dimensional structures such as a cuboid, cylinder or sphere. The embodiments of the present application do not limit this. The material of the housing 200 may be an alloy material such as aluminum alloy or ferroalloy, or a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber reinforced epoxy resin. The embodiments of the present application also do not limit this.

[0095] In some embodiments, the housing 200 may include a first part 210 and a second part 220. The first part 210 and the second part 220 are covered with each other, and the first part 210 and the second part 220 jointly define a space for accommodating the battery cells 100. The second part 220 may be a hollow structure with one end open, and the first part 210 may be a plate-like structure. The first part 210 covers the open side of the second part 220 so that the first part 210 and the second part 220 jointly define a space for accommodating the battery cells 100. The first part 210 and the second part 220 may also both be hollow structures with one side open, and the open side of the first part 210 covers the open side of the second part 220.

[0096] The battery module may include a plurality of battery cells 100. The plurality of battery cells 100 may first be connected in series, parallel or in a hybrid connection to form a battery module, and then a plurality of battery modules are connected in series, parallel or in a hybrid connection to form a battery. In the present application, the battery cell 100 may include a lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc. The embodiments of the present application do not limit this. The battery cell 100 may be in the shape of a cylinder, a flat body, a cuboid or other shapes. The embodiments of the present application also do not limit this. For the sake of brevity of description, the following embodiments will be described by taking the cubic battery cell 100 as an example.

[0097] Please refer to Figure 3 , Figure 3 which is an exploded schematic view of the battery cell 100 in some embodiments of the present application. The battery cell 100 refers to the smallest unit that makes up the battery device 10. The battery cell 100 includes a housing 110, an electrode assembly 120 and other functional components.

[0098] The housing 110 includes a housing body 111 and an end cap 112. The housing body 111 is a component for cooperating with the end cap 112 to form the internal environment of the battery cell 100, wherein the formed internal environment can be used to accommodate the electrode assembly 120, the electrolyte (not shown in the figure), and other components. The housing body 111 and the end cap 112 can be independent components. An opening can be provided on the housing body 111, and the end cap 112 is covered at the opening to form the internal environment of the battery cell 100. Without limitation, the end cap 112 and the housing body 111 can also be integrated. Specifically, the end cap 112 and the housing body 111 can first form a common connection surface before other components are put into the housing. When it is necessary to encapsulate the interior of the housing body 111, the end cap 112 is then covered on the housing body 111. The housing body 111 can be in various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing body 111 can be determined according to the specific shape and size of the electrode assembly 120. The material of the housing body 111 can be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereto. The opening of the housing body 111 can be located on the side or bottom of the housing body 111, and the embodiments of the present application do not limit this.

[0099] The end cap 112 refers to a component that can cover the opening of the housing body 111 to isolate the internal environment of the battery cell 100 from the external environment. Without limitation, the shape of the end cap 112 can be adapted to the shape of the housing body 111 to cooperate with the housing body 111. For example, the end cap 112 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 112 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 100 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 130 can be provided on the end cap 112. The electrode terminals 130 can be used to electrically connect with the electrode assembly 120 for outputting or inputting the electrical energy of the battery cell 100. In some embodiments, a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 100 reaches a threshold can also be provided on the end cap 112. In some embodiments, a liquid injection hole can also be provided on the end cap 112 for injecting electrolyte into the interior of the battery cell 100. The material of the end cap 112 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special restrictions on this. In some embodiments, an insulating member can also be provided on the inner side of the end cap 112, and the insulating member can be used to isolate the electrical connection components in the housing body 111 from the end cap 112 to reduce the risk of short circuit. Exemplarily, the material of the insulating member can be plastic, rubber, etc. In some embodiments, a pressure relief mechanism can also be provided on the housing body 111 and / or the end cap 112. The pressure relief mechanism is used to release the internal pressure when the internal pressure or temperature of the battery cell 100 reaches a threshold to improve the safety performance of the battery cell 100. The threshold design varies according to different design requirements. The threshold may depend on one or several materials of the electrode assembly 120 and the separator in the battery cell 100. The pressure relief mechanism can adopt forms such as explosion-proof valves, gas valves, pressure relief valves or safety valves, and can specifically adopt pressure-sensitive or temperature-sensitive elements or structures, that is, when the internal pressure or temperature of the battery cell 100 reaches the threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is damaged, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0100] The electrode assembly 120 is a component in the battery cell 100 where an electrochemical reaction occurs. One or more electrode assemblies 120 can be contained within the housing body 111. The electrode assembly 120 is mainly formed by winding or laminating a positive electrode plate and a negative electrode plate, and generally, a separator is provided between the positive electrode plate and the negative electrode plate. The portions of the positive electrode plate and the negative electrode plate having active materials constitute the main body portion of the electrode assembly 120, and the portions of the positive electrode plate and the negative electrode plate without active materials respectively constitute electrode tabs (not shown in the figure). The positive electrode tab and the negative electrode tab can be located together at one end of the main body portion or separately at both ends of the main body portion, can be located at the top of the main body portion, or can be located on the side wall of the main body portion, and no specific limitation is made here. During the charging and discharging process of the battery device 10, the positive electrode active material and the negative electrode active material react with the electrolyte, and the electrode tabs are connected to the electrode terminals 130 to form a current loop. The separator is used to isolate the positive electrode plate and the negative electrode plate and prevent electrons in the battery cell 100 from freely passing through, allowing ions in the electrolyte to flow freely between the positive electrode plate and the negative electrode plate. The separator can be a thin film made of materials such as PE (polyethylene) or PP (polypropylene).

[0101] According to some embodiments of the present application, please continue to refer to Figure 3 and, in combination with reference to Figures 4 to 6 , Figure 4 is a schematic cross-sectional structure diagram of a partial structure of the battery cell 100 in some embodiments of the present application, Figure 5 is a schematic partial structure diagram of the electrode terminal 130 and the adapter 140 cooperating with each other in some embodiments of the present application, Figure 6 is Figure 5 a schematic diagram of a partial enlarged structure at A in , the battery cell 100 includes a housing 110, an electrode assembly 120, an electrode terminal 130, and an adapter 140. The electrode assembly 120 is disposed within the housing 110, and the electrode terminal 130 is disposed on the housing 110. The electrode assembly 120 is electrically connected to the electrode terminal 130 by means of the adapter 140. Among them, one of the electrode terminal 130 and the adapter 140 is provided with a fitting P1, and the other is provided with a fitting hole P2. Define the one of the electrode terminal 130 and the adapter 140 provided with the fitting P1 as the first target member, and the other provided with the fitting hole P2 as the second target member. The fitting P1 includes a main body portion P11 connected to the first target member and an elastic portion P12 connected to the main body portion P11. Both the main body portion P11 and the elastic portion P12 are inserted into the fitting hole P2, and the elastic portion P12 abuts against the hole wall of the fitting hole P2. The electrode terminal 130 and the adapter 140 are connected by means of the fitting P1 and the fitting hole P2.

[0102] The electrode terminal 130 refers to a conductive member provided on the end cap 112 or the housing body 111. The electrode terminal 130 is connected to the tab of the electrode assembly 120 to output the electrical energy of the battery cell 100 or charge the battery cell 100. Generally, there are two electrode terminals 130 of the battery cell 100. The two electrode terminals 130 are respectively connected to the positive and negative tabs of the electrode assembly 120. The electrode terminal 130 connected to the positive tab is the positive electrode terminal, and the electrode terminal 130 connected to the negative tab is the negative electrode terminal. The two electrode terminals 130 can be provided on the same side or different sides of the battery cell 100.

[0103] Exemplarily, taking Figure 3 as an example, the first direction F1 and the second direction F2 are respectively the length direction and the width direction of the battery cell 100, and the third direction F3 is the height direction of the battery cell 100. The first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other in pairs. The length direction, the width direction and the height direction are relative to Figure 3 the illustrated situation, and are only for schematically explaining the dimensions of the three directions, and no specific limitations are made here.

[0104] For example, when there are electrode terminals 130 on one side of the battery cell 100 along the third direction F3, there can be two electrode terminals 130 on one side of the battery cell 100 along the third direction F3, and the two electrode terminals 130 can be the positive electrode terminal and the negative electrode terminal; when there are electrode terminals 130 on both opposite sides of the battery cell 100 along the third direction F3, there is one electrode terminal 130 on each of the two opposite sides of the battery cell 100 along the third direction F3. One side of the battery cell 100 along the third direction F3 is the positive electrode terminal, and the other side is the negative electrode terminal.

[0105] Exemplarily, taking Figure 3 as an example, there are two electrode terminals 130. The two electrode terminals 130 are provided on one side of the battery cell 100 along the third direction F3, and the two electrode terminals 130 are provided on the surface of the end cap 112 facing away from the housing body 111. Of course, in some other embodiments, the electrode terminal 130 can also be provided on one side surface of the housing body 111. No specific limitations are made here.

[0106] The adapter 140 refers to the conductive member provided in the battery cell 100. Specifically, the adapter 140 connects the tab of the electrode assembly 120 to the electrode terminal 130 to achieve the electrical connection between the electrode assembly 120 and the electrode terminal 130. Generally, there are two adapters 140, and the two adapters 140 correspond to the two electrode terminals 130 respectively. Each adapter 140 is connected to the corresponding electrode terminal 130, and each adapter 140 is connected to the corresponding tab. That is to say, each tab is connected to the corresponding electrode terminal 130 through the adapter 140 to facilitate the connection between the tab and the electrode terminal 130, and the connection is more stable.

[0107] Exemplarily, a fitting P1 may be provided on the electrode terminal 130, and a fitting hole P2 may be provided on the adapter 140. At this time, the electrode terminal 130 is the first target member, and the adapter 140 is the second target member; alternatively, a fitting hole P2 may be provided on the electrode terminal 130, and a fitting P1 may be provided on the adapter 140. At this time, the electrode terminal 130 is the second target member, and the adapter 140 is the first target member. For example, Figures 3 to 6 taking... as an example, the situation where the electrode terminal 130 is the second target member and the adapter 140 is the first target member is shown. Another example, Figures 7 to 9 taking... as an example, Figure 7 is a schematic cross-sectional structure diagram of a part of the structure of the battery cell 100 in some other embodiments of the present application, Figure 8 is Figure 7 a schematic three-dimensional structure diagram of the adapter 140 shown, Figure 9 is Figure 7 a schematic cross-sectional structure diagram of the electrode terminal 130 shown in, showing the situation where the electrode terminal 130 is the first target member and the adapter 140 is the second target member. There is no specific limitation here.

[0108] The fitting P1 and the fitting hole P2 are mutually cooperating structures. The main body portion P11 of the fitting P1 constitutes the main structure of the fitting P1. The main body portion P11 can be connected to the first target member by means of snap connection, interference fit, welding or other means. For example, the main body portion P11 and the first target member can be integrally formed. The elastic portion P12 is a component that can deform under the action of a force. The elastic portion P12 will generate an elastic force after being deformed by the force, and will keep in closer contact with the related components abutting against the elastic portion P12 under the action of the elastic force. The elastic portion P12 can be connected to the main body portion P11 by means of snap connection, interference fit, welding or other means. For example, the elastic portion P12 and the main body portion P11 can be integrally formed. The fitting hole P2 is a hole opened on the second target member. The fitting hole P2 can be a through hole or a blind hole. Taking Figures 4 to 6For example, it shows the situation where the mating hole P2 is formed on the surface of the electrode terminal 130 facing the electrode assembly 120. The opening direction of the mating hole P2 and the third direction F3 are parallel to each other. The mating hole P2 is a blind hole and does not penetrate through the electrode terminal 130.

[0109] The mating part P1 can be a conductive part. In this way, the overcurrent capacity can be further increased. The main body part P11 and the elastic part P12 are inserted into the mating hole P2 along the opening direction of the mating hole P2 and are in plug-in fit with the mating hole P2. The elastic part P12 abuts against the hole wall of the mating hole P2, that is, the elastic part P12 is deformed under the pressure of the hole wall of the mating hole P2, and the elastic part P12 generates an elastic force. Under the action of the elastic force, it contacts the hole wall of the mating hole P2 more tightly.

[0110] Thus, by providing the mating part P1 and the mating hole P2 in plug-in fit, the electrode terminal 130 and the adapter 140 are connected by plugging. At the same time, by configuring the mating part P1 to include the main body part P11 and the elastic part P12, after the mating part P1 is inserted into the mating hole P2, the elastic part P12 can be made to abut against the hole wall of the mating hole P2 by using the elasticity of the elastic part P12, further improving the plugging reliability of the mating part P1 and the mating hole P2, thereby improving the electrical connection reliability between the electrode terminal 130 and the adapter 140, and further improving the electrical connection reliability of the battery cell 100. Compared with using the welding method to electrically connect the electrode terminal 130 and the adapter 140, it can not only improve the situation where the electrode terminal 130 and the adapter 140 are poorly electrically connected due to poor welding resulting in virtual welding, but also improve the situation where metal dust, welding slag particles, etc. generated during the welding process fall into the interior of the battery cell 100, thereby improving the yield and reliability of the battery cell 100. Further, when using the laser welding process, limited by the penetration depth of the laser welding method, the adapter 140 needs to be set as thin as possible. However, when using the plugging method in the embodiments of the present application, the thickness of the adapter 140 has little influence on the connection strength of the plugging connection, so the adapter plate can be set thicker, which is beneficial to improving the overcurrent capacity of the adapter 140. At the same time, when the mating part P1 is a conductive part, the overcurrent capacity can be further enhanced. In this way, it is beneficial to improve the charging and discharging rate of the battery cell 100 and has a positive impact on the safety of the battery cell 100 under extreme operating conditions. Therefore, the plugging method provided by the embodiments of the present application can improve the reliability, yield, and safety of the battery cell 100.

[0111] According to some embodiments of the present application, please continue to refer to Figure 6 and, in combination with referring to Figure 10 Figure 10 is a schematic structural diagram of the mating part P1 in some embodiments of the present application. The elastic part P12 and the main body part P11 define a deformable space E.

[0112] At least part of the boundary of the deformable space E is jointly formed by the elastic part P12 and the main body part P11. That is, at least part of the elastic part P12 is not connected to and does not contact the main body part P11, and defines the deformable space E. The elastic part P12 can undergo elastic deformation under the action of a force. The main body part P11 can be relatively rigid or play a supporting role relative to the elastic part P12. When the elastic part P12 undergoes elastic deformation, the size of the deformable space E changes accordingly. For example, when the elastic part P12 is subjected to a pressing force, at least part of the elastic part P12 can be recessed toward the inside of the deformable space E, and the size of the deformable space E will decrease. When the pressing force applied to the elastic part P12 decreases, at least part of the elastic part P12 can protrude toward the outside of the deformable space E, and the size of the deformable space E will increase.

[0113] The deformation mode of the deformable space E depends on the material, structure, and force-bearing situation of the elastic part P12. For example, the elastic part P12 can be made of an elastic material or can have elasticity through its structure. Exemplarily, Figure 10 taking... as an example, one end of the elastic part P12 can be connected to the main body part P11, and the other end is not connected to the main body part P11. In this way, the elastic part P12 has a part that can undergo elastic deformation. Another example is Figure 11 taking... as an example. Figure 11 This is a schematic structural diagram of the fitting P1 in some other embodiments of the present application. The elastic part P12 includes a spring, and the spring is connected between another part of the elastic part P12 and the main body part P11. The material of another part of the elastic part P12 can be an elastic material or not. No specific limitation is made here.

[0114] In this way, not only can the elastic part P12 be abutted against the hole wall of the mating hole P2 by means of the deformable space E, but also during the process of inserting the fitting P1 into the mating hole P2, the elastic part P12 can deform in response to the abutment of the hole wall of the mating hole P2, which is beneficial to the insertion of the fitting P1.

[0115] Of course, in some other embodiments, the deformable space E may not be defined between the elastic part P12 and the main body part P11. For example, the elastic part P12 can be directly provided on one side of the main body part P11, and the side of the elastic part P12 and the main body part P11 facing each other are in contact. The material of the elastic part P12 has elasticity, and the material of the elastic part P12 can be rubber, silica gel, or other materials. At this time, when the fitting P1 is inserted into the mating hole P2, the elastic part P12 is compressed, and the elastic part P12 will store elastic potential energy. Under the action of the elastic potential energy, the elastic part P12 is in close contact with the hole wall of the mating hole P2. No specific limitation is made here.

[0116] According to some embodiments of the present application, continue to refer to Figure 10 , the elastic part P12 has a first end e1 connecting to the main body part P11, and a second end e2 disposed opposite to the first end e1. The second end e2 is configured as a free end.

[0117] The first end e1 of the elastic part P12 is connected to the main body part P11, and the first end e1 can be regarded as a fixed end. The second end e2 is a free end, that is, the second end e2 is not connected to the main body part P11. That is to say, the free end and the fixed end are relative. At least a part of the elastic part P12 between the first end e1 and the second end e2 is not connected to the main body part P11, and the part of the elastic part P12 at the second end e2 and the part adjacent to the second end e2 are not connected to the main body part P11. In this way, the second end e2 of the elastic part P12 is not connected to the main body part P11. Thus, the part of the elastic part P12 not connected to the main body part P11 and the main body part P11 define the deformable space E as described above.

[0118] Since the second end e2 of the elastic part P12 is a free end, the free end is not restricted by connection and can be deformed flexibly according to the direction and magnitude of the acting force. The deformation can be swinging, stretching, compression, etc., which can be determined according to the structure of the elastic part P12. In this way, the elastic part P12 has a flexible deformation ability. Thus, the part of the elastic part P12 except the first end e1 can deform more freely when subjected to an acting force, which is more beneficial to the plug-in fitting P1.

[0119] According to some embodiments of the present application, continue to refer to Figure 6 and Figure 10 , the second end e2 is closer to the end of the main body part P11 connecting the first target part than the first end e1. Exemplarily, taking Figure 6 as an example, the adapter 140 is the first target part, and the second end e2 is closer to the first target part than the first end e1.

[0120] Since the second end e2 of the elastic part P12 is closer to the end of the main body part P11 connecting the first target part, when the fitting P1 is inserted into the fitting hole P2, the first end e1 of the elastic part P12 enters the fitting hole P2 before the second end e2. In this way, when the first end e1 enters the fitting hole P2, the hole wall of the fitting hole P2 presses against the side of the elastic part P12 facing the hole wall of the fitting hole P2. As the elastic part P12 continues to extend into the fitting hole P2, the hole wall of the fitting hole P2 continuously presses against the elastic part P12. Thus, the part of the elastic part P12 except the first end e1 can deform under the pressing action of the hole wall of the fitting hole P2, and further makes the process of the elastic part P12 entering the fitting hole P2 smoother.

[0121] Of course, in some other embodiments, please refer to Figure 12 , Figure 12 which is a schematic structural diagram of the fitting P1 in some other embodiments of the present application. The second end e2 is farther from the main body P11 than the first end e1, and the end connecting the first target member is at the first end e1. In this way, during the process of inserting the elastic part P12 into the fitting hole P2, the second end e2 enters the fitting hole P2 earlier than the first end e1. At this time, in the initial stage of inserting the elastic part P12 into the fitting hole P2, the elastic part P12 can be deformed first, so that the second end e2 is closer to the main body P11, so that it can enter the fitting hole P2 together with the main body P11. There is no specific limitation here.

[0122] It can be understood that compared with the Figure 12 shown situation, in the Figure 10 shown situation, it is more convenient for the fitting P1 to enter the fitting hole P2. At the same time, after the fitting P1 enters the fitting hole P2, it is also more difficult for the fitting P1 to escape from the fitting hole P2. That is, in the Figure 10 shown situation, the insertion fastening property of the fitting P1 will be higher. Of course, in the Figure 12 shown situation, the elastic part P12 abuts against the hole wall of the fitting hole P2, so that the fitting P1 also has a certain insertion fastening property.

[0123] According to some embodiments of the present application, please continue to refer to Figure 6 and Figure 10 , the first end e1 of the elastic part P12 is connected to the end of the main body P11 facing away from the first target member.

[0124] In this way, at the initial stage of inserting the fitting P1 into the fitting hole P2, the first end e1 of the elastic part P12 and the end of the main body P11 facing away from the first target member can enter the fitting hole P2 together. From the initial stage to the completion stage of insertion, the elastic part P12 continuously abuts against the hole wall of the fitting hole P2. In this way, it is not only further beneficial to insert the elastic part P12 into the fitting hole P2, but also beneficial to reduce the space occupied by the fitting hole P2.

[0125] Of course, in some other embodiments, please refer to Figure 13 , Figure 13 which is a schematic structural diagram of the fitting P1 in still some other embodiments of the present application. The end of the main body P11 facing away from the first target member is connected to the first end e1 of the elastic part P12 between the first end e1 of the main body P11 connecting the first target member. At this time, it is also beneficial to insert the elastic part P12 into the fitting hole P2.

[0126] According to some embodiments of the present application, please continue to refer to Figure 6 and Figure 10, the direction in which the first end e1 points to the second end e2 is set at a preset angle α with respect to the opening direction of the mating hole P2, where the preset angle α is greater than 0° and less than 90°.

[0127] Taking Figure 10 as an example and with reference to Figure 6 , the direction in which the first end e1 points to the second end e2 is the preset direction Y, the opening direction of the mating hole P2 and the third direction F3 are parallel to each other, the dashed line in the figure extends along the third direction F3, and the preset angle α can be regarded as the angle formed between the preset direction Y and the dashed line. Exemplarily, the preset angle α can be 3°, 5°, 10°, 20°, 30°, 40°, 50°, 60° or 80°. There is no specific limitation here.

[0128] It should be noted that, as shown in Figure 10 , when the mating part P1 is not installed in the mating hole P2, the preset angle α is greater than 0° and less than 90°; or as shown in Figure 6 , when the mating part P1 is installed in the mating hole P2, the preset angle α is greater than 0° and less than 90°. There is no specific limitation here.

[0129] In this way, by controlling the preset angle α, the elastic part P12 is arranged to be inclined relative to the main body part P11 approximately, which not only helps the elastic part P12 to enter the mating hole P2, but also facilitates the elastic part P12 to abut against the hole wall of the mating hole P2 by virtue of the deformation of the elastic part P12.

[0130] According to some embodiments of the present application, please continue to refer to Figure 10 , Figure 12 and Figure 13 , in the initial state, the elastic part P12 extends along a straight line direction from the first end e1 to the second end e2.

[0131] The "initial state" means the state in which the elastic part P12 does not produce elastic deformation. When the elastic part P12 produces elastic deformation, the elastic part P12 may still extend along a straight line direction from the first end e1 to the second end e2, or may extend along a curved line direction from the first end e1 to the second end e2. It can be determined according to the specific magnitude of the acting force, the size of the mating hole P2, and the material and structure of the elastic part P12. There is no specific limitation here. It should be noted that when the mating part P1 is not installed in the mating hole P2, the elastic part P12 does not produce elastic deformation, and at this time, the elastic part P12 is in the initial state.

[0132] Since the straight line is the shortest distance between two points, by setting the elastic part P12 in the initial state to extend along a straight line direction from the first end e1 to the second end e2, the force transmission path is shorter, which is beneficial to more efficiently transmit the acting force. At the same time, it is also convenient to manufacture the elastic part P12.

[0133] Of course, in some other embodiments, in the initial state, the elastic part P12 extends along a curved direction from the first end e1 to the second end e2. In this way, when a force acts on the elastic part P12, the force can be distributed along the tangent direction of the curve, and this distribution can reduce the possibility of local stress concentration. At the same time, the elastic part P12 extending in the curved direction can provide elastic deformation ability in more angles. No specific limitation is made here.

[0134] According to some embodiments of the present application, please continue to refer to Figure 10 , Figure 12 and Figure 13 , the elastic part P12 is configured as a sheet-like component.

[0135] By configuring the elastic part P12 as a sheet-like component, it is not only convenient for processing and manufacturing, but also enables the elastic part P12 to have elastic deformation ability in multiple directions, which is beneficial for the elastic part P12 to generate elastic deformation under the action of a force, thereby facilitating the insertion of the fitting P1 and improving the insertion fastening property of the fitting P1.

[0136] Exemplarily, taking Figure 10 as an example, the first end e1 of the elastic part P12 is connected to one end of the main body part P11 facing away from the first target part, and the direction from the first end e1 to the second end e2 is set at a preset angle α with the opening direction of the mating hole P2. The preset angle α is greater than 0° and less than 90°. In the initial state, the elastic part P12 extends along a straight line direction from the first end e1 to the second end e2. The elastic part P12 is configured as a sheet-like component. In this way, the advantages possessed in the situations illustrated in the foregoing some embodiments can be simultaneously achieved, further improving the convenience, fastening property and reliability of the insertion.

[0137] According to some embodiments of the present application, please continue to refer to Figure 6 , and in combination with reference to Figure 14 , Figure 14 is a schematic structural view of the mating hole P2 in some embodiments of the present application. A part of the main body part P11 is snap-fitted with the mating hole P2, and another part is connected to the elastic part P12, and there is a gap g between the fitting P1 and the hole wall of the mating hole P2. The elastic part P12 is accommodated in the gap g and abuts against the hole wall of the mating hole P2.

[0138] The elastic part P12 abuts against the hole wall of the second hole section K2, which may include the situation where the second end e2 of the elastic part P12 abuts against the hole wall of the second hole section K2, the first end e1 of the elastic part P12 abuts against the hole wall of the second hole section K2, and the part of the elastic part P12 located between the first end e1 and the second end e2 abuts against the hole wall of the second section. No specific limitation is made here. In Figure 6In the illustrated case, the mating hole P2 is a blind hole. The hole wall of the second hole section K2 includes a side hole wall and a bottom hole wall. The first end e1 of the elastic part P12 abuts against the bottom hole wall of the second hole section K2, and the second end e2 of the elastic part P12 abuts against the side hole wall of the second hole section K2.

[0139] In this way, since a part of the main body part P11 is in snap-fit with the mating hole P2, and the other part is in a relatively fixed state under the elastic action of the elastic part P12, the insertion fastening performance of the fitting part P1 is further improved.

[0140] According to some embodiments of the present application, please continue to refer to Figure 6 、 Figure 10 and Figure 14 , the mating hole P2 has a first hole section K1 and a second hole section K2 that communicate with each other along the opening direction of the mating hole P2. The side of the first hole section K1 facing away from the second hole section K2 defines an opening u of the mating hole P2. The main body part P11 includes a first main body section Z1 connected to the first target part, and a second main body section Z2 connected to one end of the first main body section Z1 facing away from the first target part. The second main body section Z2 is connected to the elastic part P12. The first main body section Z1 is in snap-fit with the first hole section K1 through the opening u. The second main body section Z2 is located in the second hole section K2 and has a gap g with the hole wall of the second hole section K2.

[0141] Exemplarily, the first main body section Z1 and the second main body section Z2 can both extend along the third direction F3. The first hole section K1 and the second hole section K2 can also both extend along the third direction F3. The gap g can be formed by a change in the size of the main body part P11, or by a change in the hole diameter of the mating hole P2, or by a combined change in the size of the main body part P11 and the hole diameter of the mating hole P2, and no specific limitation is made here. Taking Figure 6 、 Figure 10 and Figure 14 as an example, it is shown that the gap g is formed by a combined change in the size of the main body part P11 and the hole diameter of the mating hole P2.

[0142] Thus, since the second main body section Z2 of the main body portion P11 is deeper into the mating hole P2 than the first main body section Z1, and the elastic portion P12 is connected to the second main body section Z2, during the insertion of the fitting P1 into the mating hole P2, the elastic portion P12 can enter the mating hole P2 following the second main body section Z2 first. The elastic portion P12 can deform in response to the abutment against the hole wall of the mating hole P2, which is conducive to the smoother insertion of the fitting P1 into the mating hole P2. At the same time, since there is a gap g between the second main body section Z2 and the hole wall of the second hole section K2, when the elastic portion P12 enters the second hole section K2, the elastic portion P12 is received in the gap g, and the insertion fastening property of the fitting P1 is improved through the abutment between the elastic portion P12 and the hole wall of the second hole section K2.

[0143] According to some embodiments of the present application, please continue to refer to Figure 14 , along the direction perpendicular to the opening direction of the mating hole P2, the maximum dimension of the first hole section K1 is smaller than the minimum dimension of the second hole section K2. For example, the aperture of the first hole section K1 is the first aperture d1, the aperture of the second hole section K2 is the second aperture d2, and the maximum value of the first aperture d1 is smaller than the minimum value of the second aperture d2.

[0144] The first hole section K1 and the second hole section K2 can be equal-diameter holes or non-equal-diameter holes. Taking Figure 14 as an example, the situation where both the first hole section K1 and the second hole section K2 are equal-diameter holes is schematically shown, and the first aperture d1 and the second aperture d2 do not change in the third direction F3. In the case where the first hole section K1 and the second hole section K2 are non-equal-diameter holes, as long as the fitting P1 and the mating hole P2 are inserted and mated, the main body portion P11 is clamped and mated with the first hole section K1, and the elastic portion P12 abuts against the hole wall of the second hole section K2, which is not specifically limited herein.

[0145] After the elastic portion P12 enters the second hole section K2 via the first hole section K1, a part of the deformation acting force accumulated by the elastic portion P12 in the first hole section K1 is released in the second hole section K2, and the other part that is not released can make the elastic portion P12 abut against the hole wall of the second hole section K2. In this way, it is difficult for the elastic portion P12 to enter the first hole section K1 from the second hole section K2. Thus, it is beneficial to improve the situation where the fitting P1 is disengaged from the mating hole P2.

[0146] According to some embodiments of the present application, please continue to refer to Figure 6 and Figure 14 , the connection between the hole wall of the first hole section K1 and the hole wall of the second hole section K2 defines a stepped portion J, and the elastic portion P12 abuts against the stepped portion J.

[0147] Thus, under the abutment of the step portion J, the elastic portion P12 can be blocked from entering the first hole section K1, which is not only beneficial to further improving the situation of the fitting P1 being disengaged from the fitting hole P2, but also beneficial to further enhancing the insertion fastening property of the fitting P1 and improving the situation of the fitting P1 becoming loose.

[0148] According to some embodiments of the present application, please continue to refer to Figures 6 to 13 , the main body portion P11 has a first side c1 and a second side c2 that are oppositely arranged along a direction perpendicular to the opening direction of the fitting hole P2, and at least one of the first side c1 and the second side c2 is provided with an elastic portion P12. On the side where the elastic portion P12 is provided, the first main body section Z1 protrudes relative to the second main body section Z2.

[0149] Exemplarily, taking Figures 6 to 13 as an example, the situation where the first side c1 is provided with the elastic portion P12 is illustrated. Also exemplarily, taking Figure 15 as an example, Figure 15 is a schematic cross-sectional structure diagram of the fitting P1 and the fitting hole P2 in some other embodiments of the present application, illustrating the situation where both the first side c1 and the second side c2 are provided with the elastic portion P12. It can be understood that in the Figures 6 to 13 illustrated situation, it is beneficial to reduce the space occupied by the fitting P1 and the fitting hole P2 while having a certain abutting force. In the Figure 15 illustrated situation, the two sides of the main body portion P11 are both subjected to the abutting force of the elastic portion P12, so that the cooperation between the adapter 140 and the electrode terminal 130 is more firm, further reducing the risk of loosening.

[0150] In this way, the second main body section Z2 is recessed relative to the first main body section Z1, so that the deformable space E defined between the elastic portion P12 and the main body portion P11 can be further increased, and further, the process of the fitting P1 entering the first hole section K1 becomes easier, which is further beneficial to inserting the fitting P1 into the fitting hole P2.

[0151] According to some embodiments of the present application, please continue to refer to Figure 6 , Figure 10 and Figure 14 , one of the first side c1 and the second side c2 is provided with the elastic portion P12. On the side where the elastic portion P12 is not provided, the second main body section Z2 abuts against the hole wall of the second hole section K2. Taking Figure 6 , Figure 10 and Figure 14 as an example, the first side c1 is provided with the elastic portion P12 and the second side c2 is not provided with the elastic portion P12.

[0152] In this way, the contact area between the main body portion P11 and the hole wall of the mating hole P2 is further increased, further improving the insertion fastening performance of the mating member P1. At the same time, the space occupied by the mating hole P2 can also be reduced.

[0153] According to some embodiments of the present application, please continue to refer to Figures 4 to 6 , Figure 10 and Figure 14 , the thickness of the first main body segment Z1 is the first thickness d3, the thickness of the second main body segment Z2 is the second thickness d4, the thickness of the elastic portion P12 is the third thickness d5, the length of the elastic portion P12 is the first length d6, and the first thickness d3 is greater than the sum of the second thickness d4 and the third thickness d5. The second hole diameter d2, the first thickness d3, the third thickness d5, the first length d6, and the preset angle α satisfy: d3 + d5 ≤ d4 ≤ L * sinα.

[0154] In this way, a deformable space E is defined between the elastic portion P12 and the main body portion P11. When the mating member P1 is inserted into the mating hole P2, a gap g is defined between the second hole segment K2 and the second main body segment Z2, and the elastic portion P12 abuts against the hole wall of the second hole segment K2, and the preset angle α decreases. Further, the preset angle α is less than 90°, and by controlling the sizes of the second hole diameter d2, the first thickness d3, the third thickness d5, the first length d6 and selecting the corresponding material of the elastic portion P12, the preset angle α can be made smaller, so that the abutting force generated by the elastic portion P12 on the hole wall of the second hole segment K2 can be greater, thereby making the cooperation between the adapter 140 and the electrode terminal 130 more stable and reliable.

[0155] According to some embodiments of the present application, please continue to refer to Figure 6 , and in combination with reference to Figure 16 and Figure 17 , Figure 16 is a three-dimensional structural schematic diagram of the adapter 140 in some embodiments of the present application, Figure 17 is a structural schematic diagram of the electrode terminal 130 in some embodiments of the present application. A plurality of mating members P1 and mating holes P2 are provided, and all the mating members P1 and all the mating holes P2 are arranged in one-to-one correspondence. All the mating members P1 are arranged around the first axis L1, and the extending direction of the first axis L1 and the opening direction of the mating hole P2 are parallel to each other. Correspondingly, all the mating holes P2 are also arranged around the first axis L1.

[0156] Since the plug-in mating part is arranged around the first axis L1, the mating piece P1 is roughly annular in layout, and the mating hole P2 is roughly annular in layout, so that the plug-in mating part can be constrained from multiple directions when subjected to external forces, and thus can resist external forces in multiple directions, thereby improving the tightness of the plug-in mating. At the same time, when the adapter 140 and the electrode terminal 130 are plug-connected, it is convenient to position them during the assembly process. In addition, it is also beneficial to use limited space to achieve plug-in connection.

[0157] According to some embodiments of this application, please continue to refer to Figure 9 and Figure 16 , all the elastic parts P12 are arranged on the side of the corresponding main body P11 facing the first axis L1; or, all the elastic parts P12 are arranged on the side of the corresponding main body P11 away from the first axis L1; or, among all the elastic parts P12, there are elastic parts P12 arranged on the side of the corresponding main body P11 facing the first axis L1, and elastic parts P12 arranged on the side of the corresponding main body P11 away from the first axis L1.

[0158] For example, Figure 16 As an example, the situation where all elastic parts P12 are arranged on the side of the corresponding main body part P11 away from the first axis L1 is illustrated. Figure 7 and Figure 9 As an example, the situation where all elastic parts P12 are arranged on the side of the corresponding main body part P11 facing the first axis L1 is illustrated. Figure 7 and Figure 9 In this cross-sectional view, only a portion of the mating part P1 is shown.

[0159] In this way, when all elastic parts P12 are arranged on the side of the corresponding main body P11 facing the first axis L1, not only can the space defined by the plug-in fitting part be more fully utilized to make the overall structure more compact, but also the risk of the first target part being collided and causing the elastic part P12 to deform can be reduced during production and transportation. When all elastic parts P12 are arranged on the side of the corresponding main body P11 away from the first axis L1, the space outside the space defined by the plug-in fitting part can be used to configure elastic parts P12 of different structures, so as to further improve the plug-in tightness of the fitting part P1. When there are elastic parts P12 arranged on the side of the corresponding main body P11 facing the first axis L1 and elastic parts P12 arranged on the side of the corresponding main body P11 away from the first axis L1 among all elastic parts P12, not only can the space of each part on the relevant parts be fully utilized, but also elastic parts P12 of different structures can be configured in the space outside the space defined by the plug-in fitting part, so as to further improve the plug-in tightness of the fitting part P1.

[0160] According to some embodiments of the present application, continue to refer to Figures 7 to 9 , Figure 16 and Figure 17 , both the fitting P1 and the fitting hole P2 are provided with three; and / or, all the fittings P1 are arranged at equal intervals around the first axis L1.

[0161] When all the fittings P1 are arranged at equal intervals around the first axis L1, since the fitting holes P2 and the fittings P1 are provided in a one-to-one correspondence, all the fitting holes P2 are also arranged at equal intervals around the first axis L1.

[0162] In this way, by setting both the fitting P1 and the fitting hole P2 to three, a triangular plug-in structure can be generally formed, which is more conducive to improving the plug-in stability and fastening of the fitting P1, thereby further improving the situation of shaking or loosening of the fitting P1. By arranging all the fittings P1 at equal intervals around the first axis L1, not only can it help to complete the plug-in process more smoothly during the insertion of the fitting P1 into the fitting hole P2, improve the situation of difficult plug-in and damage to the fitting P1 caused by excessive local force, but also is conducive to achieving a more stable connection structure.

[0163] Of course, in some other embodiments, both the fitting P1 and the fitting hole P2 can be set to two, four, five or other numbers. In some other embodiments, all the fittings P1 are arranged at unequal intervals around the first axis L1. It can be set in combination with the structure of each component, the available space, the structure of the fitting P1 and the connection requirements, and no specific limitation is made here.

[0164] According to some embodiments of the present application, continue to refer to Figures 7 to 9 , and with reference to Figure 18 , Figure 18 is a schematic cross-sectional structure view of a part of the battery cell 100 in some other embodiments of the present application. A first convex portion T1 is provided on the side of the second target member facing the first target member, and the first convex portion T1 has a first surface b1 facing the first target member. The fitting hole P2 extends from the first surface b1 in a direction away from the first target member. The first surface b1 and the side of the first target member opposite to each other are in contact with each other.

[0165] Exemplarily, taking Figure 7 and Figure 8 as an example, it shows the case where the adapter 140 is the second target member and the electrode terminal 130 is the first target member. A first convex portion T1 is provided on the side of the adapter 140 facing the electrode terminal 130, and the first surface b1 and the electrode terminal 130 are in contact with each other. Another example is taking Figure 18For example, the case where the adapter 140 is the first target member and the electrode terminal 130 is the second target member is illustrated. A first protrusion T1 is provided on the side of the electrode terminal 130 facing the adapter 140. In Figure 18 the illustrated case, the mating hole P2 is generally provided within the first protrusion T1. Of course, the mating hole P2 may also extend along the third direction F3 to a portion of the electrode terminal 130 where it does not protrude, and no specific limitation is made here. At this time, a protrusion may or may not be provided on the side of the adapter 140 facing the electrode terminal 130. With reference to Figure 18 and Figure 19 , Figure 19 is a perspective structural view of the adapter 140 in some other embodiments of the present application, illustrating the case where no protrusion is provided on the side of the adapter 140 facing the electrode terminal 130.

[0166] Furthermore, with reference to Figure 18 , taking the electrode terminal 130 being provided on the end cap 112 as an example, a through hole (not labeled in the figure) may be provided on the end cap 112 corresponding to the electrode terminal 130. Functional components such as upper plastic, lower plastic, and a seal may be correspondingly provided on the end cap 112. A space for accommodating the first protrusion T1 may be formed at the through hole of the end cap 112. In this way, the space utilization rate inside the battery cell 100 can be further improved.

[0167] Thus, by providing the first protrusion T1, it is not only beneficial to improve the structural strength of the second target member, but also beneficial to provide a longer mating hole P2, increasing the contact area between the mating member P1 and the hole wall of the mating hole P2, thereby facilitating a more secure plug-in fit between the mating member P1 and the mating hole P2 and further reducing the possibility of the mating member P1 becoming loose or falling off. At the same time, by abutting the first surface b1 and the side of the first target member facing each other, not only is the space inside the battery cell occupied reduced, but also the connection reliability between the electrode terminal 130 and the adapter 140 can be improved and the overcurrent capacity can be increased.

[0168] It can be understood that in the case where the first convex portion T1 is provided on the side of the electrode terminal 130 facing the adapter 140, providing the mating hole P2 on the first convex portion T1 not only does not additionally occupy the internal space of the electrode terminal 130, but also can increase the structural strength of the electrode terminal 130. Further, when a busbar component (not shown in the figure) of the electrode terminal 130 is provided on the side of the electrode terminal 130 facing away from the adapter 140, the connection manner between the electrode terminal 130 and the busbar component is more flexible. For example, mounting holes (not shown in the figure) can be provided on the side of the electrode terminal 130 facing away from the adapter 140, and the electrode terminal 130 is connected to the busbar component by means of the mounting holes. Of course, the connection manner between the electrode terminal 130 and the busbar component can also be other manners, and other functional holes or other structures can also be provided on the side of the electrode terminal 130 facing away from the adapter 140, and no specific limitation is made here.

[0169] According to some embodiments of the present application, please continue to refer to Figures 4 to 6 , the first target member has a second convex portion T2 facing the second target member, and the second convex portion T2 has a second surface b2 facing the second target member. The fitting member P1 is provided on the second surface b2. The second surface b2 and the side of the second target member facing each other are in contact with each other.

[0170] Exemplarily, taking Figure 4 and Figure 5 as an example, the case where the first target member is the adapter 140 and the second target member is the electrode terminal 130 is illustrated. A second convex portion T2 is provided on the side of the adapter 140 facing the electrode terminal 130, and the second surface b2 is in contact with the electrode terminal 130.

[0171] Further, in combination with referring to Figure 4 and Figure 5 , taking the electrode terminal 130 being provided on the end cap 112 as an example, as shown in the foregoing some embodiments, a space for accommodating the second convex portion T2 can be formed at the through hole of the end cap 112. In this way, the space utilization rate inside the battery cell 100 can be further improved.

[0172] In this way, by providing the second convex portion T2, it is not only beneficial to improve the structural strength of the first target member, but also beneficial to improve the space utilization rate inside the battery cell 100.

[0173] Of course, in some other embodiments, corresponding convex portions may be provided on both the sides of the adapter 140 and the electrode terminal 130 facing each other, and the two convex portions can be abutted against each other. In still other embodiments, when a corresponding convex portion is provided on one of the adapter 140 and the electrode terminal 130, a concave portion for accommodating the corresponding convex portion may be provided on the other of the adapter 140 and the electrode terminal 130. By means of the cooperation between the corresponding convex portion and concave portion, the fastening property and reliability of the connection between the adapter 140 and the electrode terminal 130 are further improved.

[0174] According to some embodiments of the present application, please continue to refer to Figure 4 and Figure 5 , a fitting P1 is provided on the adapter 140, a fitting hole P2 is provided on the electrode terminal 130, a recessed portion W recessed toward the electrode terminal 130 is provided on the side of the adapter 140 facing away from the electrode terminal 130, and a second convex portion T2 is located on the side of the adapter 140 facing the electrode terminal 130 and is defined by the recessed portion W.

[0175] Exemplarily, the second convex portion T2 can be formed by an integral molding method. For example, according to the structure of the adapter 140, the second convex portion T2 can be made by a bending process, a stamping process, a die-casting process, a forging process or other processes, which are not specifically limited herein. Of course, the second convex portion T2 may also not be formed by an integral molding method, which is not limited herein.

[0176] In this way, it is beneficial to reduce the space occupied by the adapter 140 inside the battery cell 100, thereby being beneficial to improving the energy density of the battery cell 100.

[0177] According to some embodiments of the present application, please continue to refer to Figure 6 and Figure 14 , a limiting portion X is provided on the hole wall of the fitting hole P2; along the direction pointing to the inside of the battery cell 100 along the central axis of the fitting hole P2, the limiting portion X is located downstream of the elastic portion P12.

[0178] Exemplarily, taking Figure 14 as an example, the limiting portion X may be the step portion J shown in some of the foregoing embodiments. Of course, the limiting portion X may also be a protruding portion protruding from the hole wall of the fitting hole P2, which is not specifically limited herein.

[0179] In this way, by providing the limiting portion X, the risk of the fitting P1 coming out of the fitting hole P2 can be further improved, and the insertion fastening property of the fitting P1 is improved.

[0180] According to some embodiments of the present application, please continue to refer to Figures 4 to 6 , Figure 15 and Figure 18, the sides of the electrode terminal 130 and the adapter 140 facing each other are in contact with each other.

[0181] By bringing the sides of the electrode terminal 130 and the adapter 140 facing each other into contact with each other, not only the internal space of the battery cell 100 occupied is reduced, but also the connection reliability between the electrode terminal 130 and the adapter 140 can be improved and the overcurrent capacity can be enhanced.

[0182] According to some embodiments of the present application, please continue to refer to Figure 10 , Figure 12 and Figure 13 , the elastic part P12 and the main body part P11 are integrally formed.

[0183] In this way, there is no connection interface between the elastic part P12 and the main body part P11. This can not only improve the situations such as loosening and separation that may occur at the connection part, enhance the connection strength, but also be beneficial to the manufacturing and forming.

[0184] According to some embodiments of the present application, the fitting P1 and the first target part are integrally formed.

[0185] In this way, there is no connection interface between the fitting P1 and the first target part. This can not only improve the situations such as loosening and separation that may occur at the connection part, enhance the connection strength, but also be beneficial to the manufacturing and forming.

[0186] According to some embodiments of the present application, the present application embodiment provides a battery device 10, including the battery cell 100 in any of the above embodiments. The advantages possessed by the battery cell 100 in any of the above embodiments are also possessed by the battery device 10, and will not be elaborated herein.

[0187] According to some embodiments of the present application, the present application embodiment provides an electrical device, including the battery device 10 in any of the above embodiments. The battery device 10 is used to supply power to the electrical device. The electrical device can be any of the devices or systems that use the battery device 10 described above. The advantages possessed by the battery device 10 in any of the above embodiments are also possessed by the electrical device, and will not be elaborated herein.

[0188] According to some embodiments of the present application, please refer to Figures 4 to 6 , Figure 10 , Figure 14, an embodiment of the present application provides a battery cell 100, which includes an electrode assembly 120, an electrode terminal 130, and an adapter 140. The electrode assembly 120 is electrically connected to the electrode terminal 130 by means of the adapter 140. One of the electrode terminal 130 and the adapter 140 is provided with a mating part P1, and the other is provided with a mating hole P2. Define the one of the electrode terminal 130 and the adapter 140 that is provided with the mating part P1 as the first target part, and the other that is provided with the mating hole P2 as the second target part. The mating part P1 includes a main body part P11 connected to the first target part, and an elastic part P12 connected to the main body part P11. Both the main body part P11 and the elastic part P12 are inserted into the mating hole P2, and the elastic part P12 abuts against the hole wall of the mating hole P2. The electrode terminal 130 and the adapter 140 are connected by means of the mating part P1 and the mating hole P2. The elastic part P12 and the main body part P11 define a deformable space E. The elastic part P12 has a first end e1 connecting the main body part P11, and a second end e2 disposed opposite to the first end e1. The second end e2 is configured as a free end. The second end e2 is closer to the end of the main body part P11 connecting the first target part than the first end e1. The first end e1 of the elastic part P12 is connected to the end of the main body part P11 facing away from the first target part. The direction from the first end e1 to the second end e2 of the elastic part P12 is set at a preset angle α with the opening direction of the mating hole P2, the preset angle α is greater than 0° and less than 90°. In the initial state, the elastic part P12 extends linearly from the first end e1 to the second end e2. The elastic part P12 is configured as a sheet-like component. The mating hole P2 has a first hole section K1 and a second hole section K2 communicating along the opening direction of the mating hole P2. One side of the first hole section K1 facing away from the second hole section K2 defines an opening u of the mating hole P2. The main body part P11 includes a first main body section Z1 connected to the first target part, and a second main body section Z2 connected to the end of the first main body section Z1 facing away from the first target part. The second main body section Z2 is connected to the elastic part P12. The first main body section Z1 is snap-fitted with the first hole section K1 through the opening u. The second main body section Z2 is located in the second hole section K2 and has a gap g with the hole wall of the second hole section K2. The elastic part P12 is accommodated in the gap g and abuts against the hole wall of the second hole section K2. The aperture of the first hole section K1 is smaller than the aperture of the second hole section K2, and a step J is defined at the connection of the hole wall of the first hole section K1 and the hole wall of the second hole section K2. The elastic part P12 abuts against the step J. A plurality of mating parts P1 and mating holes P2 are provided, and all the mating parts P1 and all the mating holes P2 are provided in one-to-one correspondence. All the mating parts P1 are arranged around a first axis L1, and the extending direction of the first axis L1 and the opening direction of the mating hole P2 are parallel to each other.

[0189] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell (100), characterized in that: The invention comprises a housing (110), an electrode assembly (120), an electrode terminal (130) and a switching component (140), wherein the electrode assembly (120) is arranged in the housing (110), the electrode terminal (130) is arranged on the housing (110), and the electrode assembly (120) is electrically connected to the electrode terminal (130) by means of the switching component (140); Wherein, one of the electrode terminal (130) and the adapter (140) is provided with a matching piece (P1), and the other is provided with a matching hole (P2); the one of the electrode terminal (130) and the adapter (140) provided with the matching piece (P1) is defined as a first target piece, and the other provided with the matching hole (P2) is defined as a second target piece; The matching component (P1) includes a main body (P11) connected to the first target component, and an elastic part (P12) connected to the main body (P11); the main body (P11) and the elastic part (P12) are both inserted into the matching hole (P2), and the elastic part (P12) abuts against the hole wall of the matching hole (P2); the electrode terminal (130) and the adapter (140) are connected by means of the matching component (P1) and the matching hole (P2).

2. The battery cell (100) according to claim 1, characterized in that: The elastic portion (P12) and the main body portion (P11) define a deformable space (E).

3. The battery cell (100) according to claim 2, characterized in that: The elastic portion (P12) has a first end (e1) connected to the main body portion (P11), and a second end (e2) arranged opposite to the first end (e1); The second end (e2) is configured as a free end.

4. The battery cell (100) according to claim 3, characterized in that: The second end (e2) is closer to the main body (P11) than the first end (e1) and is connected to one end of the first target component.

5. The battery cell (100) according to claim 4, characterized in that: The first end (e1) of the elastic portion (P12) is connected to an end of the main body portion (P11) that is away from the first target part.

6. The battery cell (100) according to claim 3, characterized in that: The direction from the first end (e1) to the second end (e2) is arranged at a preset angle (α) with the direction in which the matching hole (P2) is opened, and the preset angle (α) is greater than 0° and less than 90°; and / or In an initial state, the elastic portion (P12) extends from the first end (e1) to the second end (e2) along a straight line; and / or The elastic portion (P12) is configured as a sheet-like member.

7. The battery cell (100) according to any one of claims 1 to 6, characterized in that: A portion of the main body (P11) is snap-fitted with the matching hole (P2), and another portion is connected to the elastic portion (P12), and a gap (g) is provided between the matching piece (P1) and the hole wall of the matching hole (P2); The elastic portion (P12) is accommodated in the space (g) and abuts against the hole wall of the matching hole (P2).

8. The battery cell (100) according to claim 7, characterized in that: The matching hole (P2) comprises a first hole section (K1) and a second hole section (K2) which are connected along the opening direction of the matching hole (P2), and the first hole section (K1) defines an opening (u) of the matching hole (P2) on a side facing away from the second hole section (K2); The main body (P11) comprises a first main body section (Z1) connected to the first target part, and a second main body section (Z2) connected to an end of the first main body section (Z1) away from the first target part; the second main body section (Z2) is connected to the elastic part (P12); The first main body section (Z1) is snap-fitted with the first hole section (K1) via the opening (u); the second main body section (Z2) is located in the second hole section (K2) and has the spacing (g) between the second main body section (Z2) and the hole wall of the second hole section (K2).

9. The battery cell (100) according to claim 8, characterized in that: Along a direction perpendicular to the opening direction of the matching hole (P2), the maximum dimension of the first hole segment (K1) is smaller than the minimum dimension of the second hole segment (K2).

10. The battery cell (100) according to claim 9, characterized in that: A step portion (J) is defined at a connection between the hole wall of the first hole section (K1) and the hole wall of the second hole section (K2); The elastic portion (P12) abuts against the step portion (J).

11. The battery cell (100) according to claim 8, characterized in that: The main body (P11) has a first side (c1) and a second side (c2) which are arranged opposite to each other in a direction perpendicular to the opening direction of the matching hole (P2), and at least one of the first side (c1) and the second side (c2) is provided with the elastic part (P12); On the side where the elastic portion (P12) is provided, the first main body section (Z1) is arranged to protrude relative to the second main body section (Z2).

12. The battery cell (100) according to claim 11, characterized in that: One of the first side (c1) and the second side (c2) is provided with the elastic portion (P12); On the side where the elastic portion (P12) is not provided, the second main body section (Z2) abuts against the hole wall of the second hole section (K2).

13. The battery cell (100) according to any one of claims 1 to 6, characterized in that: The matching pieces (P1) and the matching holes (P2) are both provided in plurality, and all the matching pieces (P1) and all the matching holes (P2) are provided in one-to-one correspondence; All the matching parts (P1) are arranged around a first axis (L1), and an extension direction of the first axis (L1) and an opening direction of the matching holes (P2) are parallel to each other.

14. The battery cell (100) according to claim 13, characterized in that: All the elastic parts (P12) are arranged on a side of the corresponding main body part (P11) facing the first axis (L1); or All the elastic parts (P12) are arranged on a side of the corresponding main body part (P11) away from the first axis (L1); or Among all the elastic parts (P12), there are elastic parts (P12) arranged on the side of the corresponding main body (P11) facing the first axis (L1), and elastic parts (P12) arranged on the side of the corresponding main body (P11) away from the first axis (L1).

15. The battery cell (100) according to claim 13, characterized in that: The number of the mating piece (P1) and the number of the mating hole (P2) are both three; and / or All the matching parts (P1) are arranged at equal intervals around the first axis (L1).

16. The battery cell (100) according to any one of claims 1 to 6, characterized in that: A first convex portion (T1) is provided on a side of the second target part facing the first target part, and the first convex portion (T1) has a first surface (b1) arranged toward the first target part; The matching hole (P2) is extended from the first surface (b1) in a direction away from the first target part; the first surface (b1) and the first target part are in contact with each other at opposite sides.

17. The battery cell (100) according to any one of claims 1 to 6, characterized in that: The first target part has a second convex portion (T2) disposed toward the second target part, and the second convex portion (T2) has a second surface (b2) disposed toward the second target part; The matching piece (P1) is arranged on the second surface (b2); the second surface (b2) and the second target piece are in contact with each other at opposite sides thereof.

18. The battery cell (100) according to claim 17, characterized in that: The adapter (140) is provided with the matching piece (P1), and the electrode terminal (130) is provided with the matching hole (P2); The adapter (140) has a recessed portion (W) on a side facing away from the electrode terminal (130) and is recessed toward the electrode terminal (130); the second protrusion (T2) is located on a side of the adapter (140) facing the electrode terminal (130); and the second protrusion (T2) is defined by the recessed portion (W).

19. The battery cell (100) according to any one of claims 1 to 6, characterized in that: The elastic part (P12) and the main body part (P11) are integrally formed.

20. The battery cell (100) according to any one of claims 1 to 6, characterized in that: The matching part (P1) and the first target part are integrally formed.

21. A battery device (10), characterized in that: Comprising the battery cell (100) according to any one of claims 1 to 20.

22. An electrical equipment, characterized in that: Comprising a battery device (10) as claimed in claim 21.

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