Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device includes a battery cell, a bus member, and a separator. The battery monomer comprises a shell, an electrode assembly and an electrode terminal, the electrode assembly is arranged in the shell, the shell comprises a wall part, the electrode terminal is arranged on the wall part and connected to the electrode assembly, and the electrode terminal exceeds the wall part in the direction away from the electrode assembly. At least part of the confluence component is located on the side, away from the electrode assembly, of the electrode terminal and connected to the electrode terminal. The separator comprises a main body part and a protruding part, the main body part is arranged on the side, away from the electrode assembly, of the wall part and abuts against the wall part, at least part of the protruding part protrudes out of the first surface, away from the wall part, of the main body part, the protruding part comprises a plurality of protruding sub-parts arranged along the periphery of the electrode terminal, and one end of each protruding sub-part is connected to the main body part; and the two adjacent convex sub-parts are arranged separately, so that the convex sub-parts are easy to deform towards the electrode terminals, the risk of short circuit is reduced, and the reliability of the battery device is improved.

Description

Technical Field

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

[0002] With the development of new energy technologies, batteries are becoming increasingly widely used. For example, batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace, among other fields.

[0003] The development of battery technology must take into account multiple design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, battery reliability must also be considered. Utility Model Content

[0004] Embodiments of the present application provide a battery device and an electrical device, which can improve reliability.

[0005] According to a first aspect of the present application, a battery device is provided, comprising a battery cell, a current collecting component, and an insulator. The battery cell comprises a housing, an electrode assembly, and an electrode terminal, wherein the electrode assembly is disposed within the housing, the housing comprising a wall portion, the electrode terminal being disposed within the wall portion and connected to the electrode assembly, the electrode terminal extending beyond the wall portion in a direction away from the electrode assembly; at least a portion of the current collecting component is located on a side of the electrode terminal away from the electrode assembly and is connected to the electrode terminal; the insulator comprises a main body portion and a protruding portion, the main body portion being disposed on a side of the wall portion away from the electrode assembly and abutting against the wall portion, the main body portion having a first surface facing away from the wall portion, at least a portion of the protruding portion protruding from the first surface in a direction away from the wall portion; the protruding portion comprises a plurality of protruding sub-parts, the plurality of protruding sub-parts being disposed along the periphery of the electrode terminal, one end of the protruding sub-part being connected to the main body portion, the other end of the protruding sub-part being abutted against the current collecting component, and two adjacent protruding sub-parts being disposed separately.

[0006] The pressure exerted by the current collector against the protruding sub-portions is directed toward the wall portion, while the pressure exerted by the wall portion against the main body portion is directed toward the current collector. Therefore, the separator as a whole is subjected to opposing pressures from the current collector and the wall portion. Under this opposing pressure, the multiple, separated protruding sub-portions disposed along the periphery of the electrode terminal are easily deformed and folded toward the electrode terminal, thereby reducing the spacing between the electrode terminal and the protruding sub-portions. This, to a certain extent, blocks or isolates weld particles generated during the welding of the current collector and the electrode terminal, reducing the possibility of weld particles entering between the separator and the wall portion, thereby reducing the risk of short circuits and improving the reliability of the battery device.

[0007] In some embodiments, each protruding sub - portion has two side surfaces along the circumferential direction of the electrode terminal, and the relatively - arranged side surfaces of two adjacent protruding sub - portions are in contact with each other. There will be no gap formed between two adjacent protruding sub - portions, and the welding particles will not fall onto the wall portion through the interface between two adjacent protruding sub - portions, which is beneficial to improving the effect of preventing welding particles from falling and further reducing the short - circuit risk.

[0008] In some embodiments, the protruding sub - portion includes a first end and a second end. The first end is connected to the main body portion, and the second end abuts against the current - collecting component. Along the direction from the first end to the second end, the dimension of at least one protruding sub - portion gradually decreases along the circumferential direction of the electrode terminal. Before assembly, a gap can be formed between at least some adjacent protruding sub - portions to provide a space for the deformation of the protruding sub - portion and reduce the possibility of interference when adjacent protruding sub - portions deform during the assembly process.

[0009] In some embodiments, the protruding sub - portion is directly connected to the main body portion. The movable range of the protruding sub - portion is larger, the protruding sub - portion is more likely to deform, and the amount of deformation is larger, which is beneficial to improving the effect of preventing particles from falling; alternatively, the protruding portion further includes a connecting sub - portion surrounding the electrode terminal. One side of the connecting sub - portion is connected to the main body portion, and each protruding sub - portion is connected to the other side of the connecting sub - portion, which can improve the structural strength of the protruding portion to a certain extent and reduce the risk of the protruding sub - portion breaking.

[0010] In some embodiments, along the direction perpendicular to the thickness direction of the wall portion, at least part of the protruding portion bends and extends and can deform in a direction away from the electrode terminal. Through the deformation of the protruding portion, the assembly tolerance between the separator and the electrode terminal can be absorbed, which is beneficial to improving the assembly efficiency. That is, even if the relative positions of multiple battery cells deviate due to stacking or other reasons with respect to the separator, the battery cells can squeeze the protruding portion to deform it to assemble the separator and the battery cells together.

[0011] In some embodiments, the cross - section of at least part of the protruding portion perpendicular to the circumferential direction of the electrode terminal is wavy. The bending of the protruding portion is smoother and gentler, and it is not easy to break due to stress concentration.

[0012] In some embodiments, the battery cell includes an insulating member. The insulating member is connected to the wall portion, at least partially surrounds the electrode terminal and is fixed to the electrode terminal. The electrode terminal extends beyond the insulating member in a direction away from the electrode assembly; a part of the protruding sub - portion is located between the current - collecting component and the insulating member. Along the thickness direction of the wall portion, the protruding sub - portion can also cover or block at least part of the insulating member and the position where the insulating member is connected to the wall portion, further reducing the possibility of welding particles falling between the separator and the wall portion, which is beneficial to improving the effect of preventing welding particles from falling, further reducing the short - circuit risk, and improving the reliability of the battery device.

[0013] In some embodiments, the portion of the electrode terminal that protrudes beyond the insulating member is spaced apart from the protruding sub-portion in a direction perpendicular to the thickness of the wall portion. A gap may be formed between the portion of the electrode terminal that protrudes beyond the insulating member and the protruding sub-portion in a direction perpendicular to the thickness of the wall portion, thereby reducing interference between the electrode terminal and the protruding sub-portion and improving assembly efficiency.

[0014] In some embodiments, the thickness of the portion of the protrusion located between the current collector and the insulating member is less than the dimension of the electrode terminal protruding from the insulating member. Along the thickness direction of the wall portion, the portion of the protrusion located between the current collector and the insulating member may be spaced apart from the insulating member. The protrusion can shield welding particles while preventing excessive thickness from interfering with the welding process between the current collector and the electrode terminal, thereby improving the welding process between the current collector and the electrode terminal.

[0015] In some embodiments, the protruding portion includes a first wall and a second wall. The first wall abuts against the current collecting member, and the second wall is connected between the first wall and the main body. At least a portion of the first wall is located between the current collecting member and the insulating member. The thickness of the portion of the first wall located between the current collecting member and the insulating member is less than the thickness of the main body and the thickness of the second wall. The greater thickness of the main body and the second wall provides relatively greater structural strength, thereby improving the structural strength of the separator and reducing the possibility of overall deformation of the separator.

[0016] In some embodiments, the electrode terminal includes a terminal plate, which is located on the side of the wall facing away from the electrode assembly. The terminal plate is rectangular, and the protrusion matches the shape of the terminal plate; at least some of the protrusions are formed at the corners of the protrusion. The shape of the protrusion matches the shape of the terminal plate, which ensures uniform spacing between each protrusion and the terminal plate, thereby improving the ability to prevent particle drop. At least some of the protrusions are formed at the corners of the protrusion, which facilitates the formation of smaller gaps between adjacent protrusions, further improving the ability to prevent particle drop.

[0017] In some embodiments, the protruding sub-portions formed at the corners of the protruding portion have an arcuate cross-section perpendicular to the thickness of the wall portion, while the remaining protruding sub-portions have a strip-shaped cross-section perpendicular to the thickness of the wall portion. The arcuate cross-section of the protruding sub-portions formed at the corners of the protruding portion makes the corners of the protruding portion smoother and the transition more gradual.

[0018] In some embodiments, the protrusion includes a first end and a second end, the first end being connected to the main body, the second end being abutted against the current collecting member, and the protrusion formed at the corner of the protrusion gradually decreasing in size along the circumference of the electrode terminal as it extends from the first end to the second end. Before assembly, a gap may be formed between any two adjacent protrusions to provide space for deformation of the protrusions and reduce the possibility of interference between the adjacent protrusions during deformation during assembly.

[0019] In some embodiments, the electrode terminal includes a terminal plate located on the side of the wall facing away from the electrode assembly. The terminal plate is cylindrical, and the protrusion matches the shape of the terminal plate. Multiple protrusions are evenly distributed along the circumference of the electrode terminal. The degree of deformation of each protrusion is relatively uniform, which facilitates the formation of a circular avoidance hole that matches the terminal plate and improves the effect of preventing particles from falling.

[0020] In some embodiments, the separator is provided with a relief hole, and a plurality of protrusions are arranged along the periphery of the relief hole. A portion of the electrode terminal is exposed through the relief hole on the side of the separator facing the current collecting member and connected to the current collecting member. The relief hole can be reduced in size by deforming the protrusions toward the electrode terminal, thereby preventing welding particles from falling onto the wall while facilitating assembly, thereby reducing the risk of short circuits and improving reliability.

[0021] In some embodiments, the housing includes a shell and an end cover, the shell has an opening, the end cover covers the opening, and the wall portion is the end cover.

[0022] According to the second aspect of the present application, an embodiment of the present application further provides an electrical device, which includes a battery device provided according to any embodiment of the present application, and the battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic structural diagram of a vehicle provided in some embodiments of the present application.

[0025] Figure 2 It is a schematic diagram of the exploded structure of the battery device provided in some embodiments of the present application.

[0026] Figure 3 This is a schematic diagram of the exploded structure of a battery cell of a battery device provided in some embodiments of the present application.

[0027] Figure 4 This is a schematic structural diagram of an isolation member and a battery cell of a battery device provided in some embodiments of the present application.

[0028] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of area A in the middle.

[0029] Figure 6 It is a schematic diagram of a partial cross-sectional structure of a battery device provided in some embodiments of the present application.

[0030] Figure 7 is Figure 6 The enlarged structural schematic diagram of area B in

[0031] Figure 8 is the partial structural schematic diagram of the separator and the battery cell of the battery device provided in some other embodiments of the present application.

[0032] Figure 9 is the partial cross-sectional structural schematic diagram of the battery device provided in some other embodiments of the present application.

[0033] Figure 10 is the partial cross-sectional structural schematic diagram of the battery device provided in some other embodiments of the present application.

[0034] Figure 11 is the exploded structural schematic diagram of the separator and the battery cell of the battery device provided in some other embodiments of the present application.

[0035] Figure 12 is Figure 11 The enlarged structural schematic diagram of area C in

[0036] In the drawings:

[0037] Vehicle 1000, battery device 100, controller 200, motor 300;

[0038] Battery cell 10, housing 11, wall portion 111, shell 11a, opening 11a1, end cap 11b, electrode assembly 12, electrode terminal 13, terminal board 131, insulating member 14, box body 20, first box body portion 21, second box body portion 22, bus bar component 30, separator 40, main body portion 41, first surface 411, protruding portion 42, protruding sub-portion 421, first end 421a, second end 421b, side surface 4211, first wall 4212, second wall 4213, connecting sub-portion 422, avoidance hole 43, flexible circuit board 50, thickness direction X. Detailed Description of the Embodiments

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the specification of this application 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 drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

[0041] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase may not necessarily refer to the same embodiment when it appears in various places in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0042] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", and "attached to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0044] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to this application.

[0045] The term "a plurality of" as used in this application means two or more (including two).

[0046] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism but also the case of approximately parallelism commonly recognized in engineering; at the same time, "perpendicular" also includes not only the case of absolute perpendicularity but also the case of approximately perpendicularity commonly recognized in engineering.

[0047] In the embodiments of the present application, the battery cell may be a secondary battery cell, which refers to a battery cell that can be activated by charging after discharging so as to be used continuously.

[0048] The battery cell may be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium-metal battery cell, a sodium-metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., and the embodiments of the present application are not limited thereto.

[0049] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc., and the present application has no special limitation.

[0050] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a busbar component.

[0051] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0052] The battery device generally includes a box body for encapsulating one or more battery cells. The box body can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0053] As an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties. The battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.

[0054] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0055] In some embodiments, the box body may be a part of the chassis structure of a vehicle. For example, a part of the box body may become at least a part of the floor of the vehicle, or a part of the box body may become at least a part of the cross beam and longitudinal beam of the vehicle.

[0056] In some embodiments, the battery device may be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0057] Battery devices generally use busbar components to connect each battery cell, and use a separator to partially separate the busbar components and the battery cells. The separator can also play a role in supporting the busbar components. For example, the separator can be a separator plate. The electrode terminals of the battery cells are connected to the busbar components by welding, and insulating parts are fixedly arranged around the electrode terminals to insulate and isolate the electrode terminals from the outer shell of the battery cells through the insulating parts. To ensure a certain assembly tolerance, the aperture of the avoidance hole corresponding to the electrode terminal on the separator is much larger than the outer diameter of the insulating part, resulting in a certain gap between the separator and the insulating part. However, the welding particles generated during the welding of the electrode terminals and the busbar components may fall between the outer shell of the battery cell and the separator through the gap between the separator and the insulating part, thus causing an internal short-circuit phenomenon.

[0058] In view of this, the embodiments of the present application provide a technical solution, which sets the separator to at least include a main body part and a protruding part. The main body part abuts against the wall part of the battery cell. The protruding part is arranged along the outer periphery of the electrode terminal and includes a plurality of separated protruding sub-parts, and the protruding sub-parts abut against the busbar component. The pressing action of the busbar component on the protruding sub-parts is towards the wall part, and the pressing action of the wall part on the main body part is towards the busbar component. Therefore, the separator as a whole is subjected to opposite pressing actions from the busbar component and the wall part. Under this opposite pressing action, the plurality of separated protruding sub-parts arranged along the outer periphery of the electrode terminal are prone to converge and deform towards the electrode terminal to reduce the spacing distance between the electrode terminal and the protruding sub-parts, thereby blocking or isolating the welding particles generated when the busbar component and the electrode terminal are connected to a certain extent, reducing the possibility of the welding particles entering between the separator and the wall part, which is beneficial to reducing the short-circuit risk and improving the reliability of the battery device.

[0059] The technical solution provided by the embodiments of the present application can be used in battery devices and electrical equipment using the battery device as a power source.

[0060] The electrical equipment can be, but is not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toys can include fixed or mobile electric toys. For example, game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0061] For the convenience of description, the following embodiments take the electrical equipment as a vehicle as an example for description.

[0062] Figure 1 It is a schematic structural diagram of a vehicle provided by some embodiments of the present application. Refer to Figure 1, the vehicle 1000 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 100 is disposed inside the vehicle 1000, and the battery device 100 can be disposed at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can serve as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0063] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0064] Figure 2 is an exploded structural schematic diagram of the battery device provided in some embodiments of the present application. Refer to Figure 2 , the battery device 100 may include a box body 20 and a plurality of battery cells 10. The plurality of battery cells 10 are accommodated in the box body 20.

[0065] The box body 20 can be a component for accommodating the battery cells 10. The box body 20 provides a accommodation space for the battery cells 10, and the box body 20 can adopt various structures.

[0066] In some embodiments, the box body 20 can include a first box body part 21 and a second box body part 22. The first box body part 21 and the second box body part 22 cover each other, and the first box body part 21 and the second box body part 22 jointly define a accommodation space for accommodating the battery cells 10. The second box body part 22 can be a hollow structure with one end open. The first box body part 21 is a plate-like structure. The first box body part 21 covers the open side of the second box body part 22 to form the box body 20 with a accommodation space; both the first box body part 21 and the second box body part 22 can also be hollow structures with one side open, and the open side of the first box body part 21 covers the open side of the second box body part 22 to form the box body 20 with a accommodation space. Of course, the first box body part 21 and the second box body part 22 can be of various shapes, such as a cylinder, a cuboid, etc.

[0067] To improve the sealing performance after the connection between the first box body part 21 and the second box body part 22, a sealing member can also be provided between the first box body part 21 and the second box body part 22, such as sealant, sealing ring, etc.

[0068] Assuming that the first box body part 21 covers the top of the second box body part 22, the first box body part 21 can also be called the upper box cover, and the second box body part 22 can also be called the lower box body.

[0069] In the battery device 100, there may be one or more battery cells 10. If there are multiple battery cells 10, the multiple battery cells 10 can be connected in series, in parallel, or in a combined series-parallel connection. A combined series-parallel connection means that there are both series and parallel connections among the multiple battery cells 10.

[0070] The multiple battery cells 10 can be directly connected in series, in parallel, or in a combined series-parallel connection together, and then the whole formed by the multiple battery cells 10 is accommodated in the box body 20. Of course, it is also possible that the multiple battery cells 10 are first connected in series, in parallel, or in a combined series-parallel connection to form battery modules, and then the multiple battery modules are connected in series, in parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box body 20.

[0071] Exemplarily, the battery cell 10 can be the smallest unit that makes up the battery.

[0072] Figure 3 It is a schematic exploded view of the battery cell of the battery device provided in some embodiments of the present application. Figure 4 It is a schematic structural view of the separator and the battery cell of the battery device provided in some embodiments of the present application. Figure 5 It is Figure 4 An enlarged schematic structural view of area A in Figure 6 It is a schematic partial sectional view of the battery device provided in some embodiments of the present application. Figure 7 It is Figure 6 An enlarged schematic structural view of area B in

[0073] In some embodiments, referring to Figures 2 to 7 , the battery device 100 includes a battery cell 10, a current collecting component 30, and a separator 40. The battery cell 10 includes a housing 11, an electrode assembly 12, and an electrode terminal 13. The electrode assembly 12 is disposed in the housing 11. The housing 11 includes a wall portion 111. The electrode terminal 13 is disposed on the wall portion 111 and connected to the electrode assembly 12. The electrode terminal 13 extends beyond the wall portion 111 in a direction away from the electrode assembly 12. At least a part of the current collecting component 30 is located on a side of the electrode terminal 13 away from the electrode assembly 12 and connected to the electrode terminal 13. The separator 40 includes a main body portion 41 and a protruding portion 42. The main body portion 41 is disposed on a side of the wall portion 111 away from the electrode assembly 12 and abuts against the wall portion 111. The main body portion 41 has a first surface 411 facing away from the wall portion 111. At least a part of the protruding portion 42 protrudes from the first surface 411 in a direction away from the wall portion 111. The protruding portion 42 includes a plurality of protruding sub-portions 421. The plurality of protruding sub-portions 421 are disposed along the outer periphery of the electrode terminal 13. One end of the protruding sub-portion 421 is connected to the main body portion 41, and the other end abuts against the current collecting component 30. Adjacent two protruding sub-portions 421 are separated from each other.

[0074] The electrode assembly 12 is a component in the battery cell 10 where an electrochemical reaction occurs.

[0075] The number of electrode assemblies 12 can be one or more.

[0076] The housing 11 is a hollow structure, and a space is formed inside the housing for accommodating the electrode assembly 12 and the electrolyte. The shape of the housing 11 can be cylindrical, prismatic, rectangular or other shapes.

[0077] Optionally, the housing 11 may include a shell 11a and an end cover 11b, and the shell 11a and the end cover 11b may be independent components. The shell 11a has an opening, and the end cover 11b covers the opening of the shell 11a.

[0078] The housing 11a may be open at one end or at both ends. For example, the housing 11a is open at one end, and a single end cap 11b is provided to cover the opening of the housing 11a. As another example, the housing 11a may be open at both ends, and two end caps 11b are provided, each of which covers the two openings of the housing 11a.

[0079] The shell 11 a may include a plurality of integrally formed shell walls, and the end cover 11 b and the plurality of shell walls of the shell 11 a together enclose an inner space of the outer shell 11 .

[0080] The housing 11a can be made of a variety of materials, such as copper, iron, aluminum, and aluminum alloys. The material of the end cap 11b can be the same as or different from that of the housing 11a. Optionally, the end cap 11b can be made of a material with a certain hardness and strength (such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.). This makes the end cap 11b less likely to deform when subjected to compression or collision, thereby providing the battery cell 10 with greater structural strength and improved reliability.

[0081] The wall portion 111 may be an end cover 11 b or one of the walls of the housing 11 a .

[0082] The electrode terminal 13 is electrically connected to the electrode assembly 12 and is used to draw current from the electrode assembly 12. The electrode terminal 13 can be directly connected to the electrode assembly 12 or indirectly connected to the electrode assembly 12 via a switching component.

[0083] The electrode terminal 13 extends beyond the wall portion 111 in a direction away from the electrode assembly 12 . At least a portion of the electrode terminal 13 is located on a side of the wall portion 111 away from the electrode assembly 12 .

[0084] Optionally, the wall portion 111 may be provided with a through hole, and a portion of the electrode terminal 13 is located in the through hole, so that the electrode terminal 13 is connected to the electrode assembly 12 located inside the housing 11 through the through hole.

[0085] Optionally, the electrode terminal 13 may penetrate through the wall portion 111 in the thickness direction X of the wall portion 111, so that the electrode terminal 13 is connected to the electrode assembly 12 located inside the housing 11 and the bus bar component 30 located outside the housing 11.

[0086] The bus bar component 30 may be connected to the electrode terminal 13 by laser welding or other suitable welding methods. The bus bar component 30 is used to connect the electrode terminal 13 to the management system of the battery device 100.

[0087] The bus bar component 30 may be entirely located on the side of the electrode terminal 13 away from the electrode assembly 12, or may be partially located on the side of the electrode terminal 13 away from the electrode assembly 12.

[0088] The separator 40 may be entirely provided on the side of the wall portion 111 facing away from the electrode assembly 12. The bus bar component 30 is located on the side of the separator 40 facing away from the wall portion 111. The separator 40 is at least used to isolate the wall portion 111 and the bus bar component 30.

[0089] Optionally, the battery device 100 further includes a flexible circuit board 50. The flexible circuit board 50 is provided on the side of the separator 40 facing away from the wall portion 111 and is connected to the bus bar component 30. The separator 40 is also used to isolate the flexible circuit board 50 and the wall portion 111.

[0090] The separator 40 may be provided with an avoidance hole 43. A part of the electrode terminal 13 may be exposed through the avoidance hole 43 on the side of the separator 40 facing away from the wall portion 111 and is connected to the bus bar component 30.

[0091] Optionally, the shape of the avoidance hole 43 may match the shape of the portion of the electrode terminal 13 located outside the wall portion 111. Exemplarily, the portion of the electrode terminal 13 located outside the wall portion 111 may be rectangular, and the avoidance hole 43 may be a square hole; the portion of the electrode terminal 13 located outside the wall portion 111 may be cylindrical, and the avoidance hole 43 may be a circular hole. It can be understood that the outside of the wall portion 111 refers to the side of the wall portion 111 facing away from the electrode assembly 12.

[0092] Optionally, the separator 40 may be a plate-like structure to increase its isolation area.

[0093] The separator 40 may be connected to the bus bar component 30 by riveting, screwing, bonding, clamping or other suitable methods. The separator 40 may also be connected to the housing 20 or the support structure inside the housing 20 by riveting, screwing, bonding, clamping or other suitable methods to support the separator 40 through the housing 20 or the support structure.

[0094] The material of the separator 40 may include insulating materials.

[0095] The main body portion 41 is provided on the side of the wall portion 111 facing away from the electrode assembly 12. The main body portion 41 abuts against the wall portion 111, and there is a pressing action between the main body portion 41 and the wall portion 111 along the thickness direction X of the wall portion 111.

[0096] The main body portion 41 has a first surface 411 facing away from the wall portion 111 and a second surface facing the wall portion 111. The main body portion 41 can abut against the wall portion 111 through the second surface.

[0097] The protruding portion 42 can protrude from the first surface 411 as a whole in a direction away from the wall portion 111. The protruding portion 42 can also partially protrude from the first surface 411 in a direction away from the wall portion 111, and another part of the protruding portion 42 can be flush with the main body portion 41. In this case, the other part of the protruding portion 42 can abut against the wall portion 111.

[0098] The protruding sub - portion 421 can be directly connected to the main body portion 41 or indirectly connected to the main body portion 41 through other structures.

[0099] The separation of two adjacent protruding sub - portions 421 means that the two adjacent protruding sub - portions 421 are not connected or fixed to each other. The two adjacent protruding sub - portions 421 can be in contact or not in contact with each other.

[0100] In one example, a plurality of protruding sub - portions 421 of the protruding portion 42 can be arranged closely along the outer periphery of the electrode terminal 13, that is, two adjacent protruding sub - portions 421 are in contact with each other.

[0101] In another example, there can also be a certain gap between two adjacent protruding sub - portions 421.

[0102] One end of the protruding sub - portion 421 away from the main body portion 41 abuts against the bus bar component 30, and there is a pressing action between the protruding sub - portion 421 and the bus bar component 30 along the thickness direction X of the wall portion 111.

[0103] The other end of the protruding sub - portion 421 close to the main body portion 41 can be connected to the main body portion 41 or to other structures of the protruding portion 42. One end of the protruding sub - portion 421 away from the main body portion 41 is a free end, and the other end of the protruding sub - portion 421 close to the main body portion 41 is a fixed end. When the two ends of the protruding sub - portion 421 are subjected to opposite extrusion forces, the protruding sub - portion 421 can be deformed, thereby changing the position of the protruding sub - portion 421 relative to the electrode terminal 13.

[0104] Optionally, the protruding portion 42 and the main body portion 41 can be an integrally formed structure.

[0105] The pressing force of the busbar component 30 on the protruding sub-portions 421 is directed toward the wall portion 111, and the pressing force of the wall portion 111 on the main body 41 is directed toward the busbar component 30. Therefore, when the busbar component 30 and the electrode terminal 13 are connected, the separator 40 as a whole is subjected to the opposing pressing forces from the busbar component 30 and the wall portion 111. Under this opposing pressing force, the multiple separated protruding sub-portions 421 arranged along the periphery of the electrode terminal 13 are easily deformed and contracted toward the electrode terminal 13, thereby reducing the spacing between the electrode terminal 13 and the protruding sub-portions 421. This, to a certain extent, blocks or isolates welding particles generated when the busbar component 30 and the electrode terminal 13 are connected, reducing the possibility of welding particles entering between the separator 40 and the wall portion 111, thereby reducing the risk of short circuits and improving the reliability of the battery device 100.

[0106] The main body 41 is disposed on a side of the wall 111 away from the electrode assembly 12 . Along the thickness direction X, the main body 41 can cover at least a portion of the wall 111 , thereby replacing a traditional insulating patch and simplifying the structure and assembly process of the battery device 100 .

[0107] Before the busbar component 30 and the electrode terminal 13 are connected, there is no abutment between the main body 41 and the wall portion 111, and between the protruding sub-portion 421 and the busbar component 30, and the protruding sub-portion 421 will not be deformed. Therefore, a plurality of protruding sub-portions 421 can be enclosed to form a larger assembly space, reserving a larger assembly gap for the isolating member 40 and the electrode terminal 13, which is conducive to improving assembly efficiency.

[0108] It can be understood that in order to enable the busbar component 30 and the wall portion 111 to exert a pressing effect on the isolation member 40 after assembly, before assembly, along the thickness direction X of the wall portion 111, the distance between the portion of the main body 41 used to abut against the wall portion 111 and the end of the protruding sub-portion 421 used to abut against the busbar component 30 must be greater than the size of the electrode terminal 13 exceeding the wall portion 111.

[0109] In some embodiments, each protruding sub-portion 421 has two side surfaces 4211 along the circumference of the electrode terminal 13 , and the oppositely disposed side surfaces 4211 of two adjacent protruding sub-portions 421 are in contact with each other.

[0110] In order to facilitate the assembly of the isolation member 40 and the battery cell 10, before the busbar component 30 and the electrode terminal 13 are connected, two adjacent protrusions 421 can be spaced apart, that is, a certain gap is left between the oppositely arranged side surfaces 4211 of two adjacent protrusions 421, and the gap can provide space for the deformation of the protrusions 421.

[0111] After the bus bar component 30 and the electrode terminal 13 are connected, under the extrusion of the bus bar component 30 and the wall portion 111, the protruding sub - portion 421 is deformed towards the electrode terminal 13 until the gap between two adjacent protruding sub - portions 421 is eliminated, and the relatively arranged side surfaces 4211 of two adjacent protruding sub - portions 421 are in contact with each other.

[0112] It can be understood that there may be a certain abutting effect between two adjacent protruding sub - portions 421, or they may just be in contact.

[0113] In the embodiment of the present application, the relatively arranged side surfaces 42 eleven of two adjacent protruding sub - portions 421 are in contact with each other, and no gap is formed between two adjacent protruding sub - portions 421, so that the welding particles will not fall onto the wall portion 111 through the interface between two adjacent protruding sub - portions 421, which is beneficial to improving the effect of preventing welding particles from falling and further reducing the short - circuit risk.

[0114] In some embodiments, the protruding sub - portion 421 has a first end 421a and a second end 421b. The first end 421a is connected to the main body portion 41, and the second end 421b abuts against the bus bar component 30. Along the direction extending from the first end 421a to the second end 421b, the dimension of at least one protruding sub - portion 421 in the circumferential direction of the electrode terminal 13 gradually decreases.

[0115] The dimension of the protruding sub - portion 421 in the circumferential direction of the electrode terminal 13 can be the width of the protruding sub - portion 421. Along the direction extending from the first end 421a to the second end 421b, the width of at least part of the protruding sub - portion 421 gradually decreases.

[0116] In one example, the width of each protruding sub - portion 421 gradually decreases along the direction extending from the first end 421a to the second end 421b. Thus, before assembly, a certain gap can be formed between any two adjacent protruding sub - portions 421, and the dimension of this gap in the circumferential direction of the electrode terminal 13 gradually increases along the protruding direction of the protruding portion 42. After assembly, each protruding sub - portion 421 can produce a certain deformation, and the deformation degrees of multiple protruding sub - portions 421 are relatively uniform, and the cooperation effect between two adjacent protruding sub - portions 421 is better.

[0117] In another example, only the width of part of the protruding sub - portions 421 gradually decreases along the direction extending from the first end 421a to the second end 421b, and the width of the other part of the protruding sub - portions 421 is the same at any position. Before assembly, a gap is formed between at least part of two adjacent protruding sub - portions 421, and the dimension of this gap in the circumferential direction of the electrode terminal 13 gradually increases along the protruding direction of the protruding portion 42. After assembly, at least part of the protruding sub - portions 421 can be deformed close to the electrode terminal 13.

[0118] Optionally, the protruding sub-parts 421 with gradually decreasing widths and the protruding sub-parts 421 with the same width can be alternately arranged along the circumferential direction of the electrode terminal 13. Thus, a certain gap can also be formed between any two adjacent protruding sub-parts 421 before assembly. After assembly, a better matching effect can also be formed between two adjacent protruding sub-parts 421.

[0119] In the embodiment of the present application, at least part of the dimensions of the protruding sub-parts 421 along the circumferential direction of the electrode terminal 13 are set to gradually decrease along the direction extending from the first end 421a to the second end 421b. Before assembly, a gap can be formed between at least part of two adjacent protruding sub-parts 421 to provide a space for the deformation of the protruding sub-parts 421 and reduce the possibility of interference when two adjacent protruding sub-parts 421 are deformed during the assembly process.

[0120] In some embodiments, the protruding sub-parts 421 are directly connected to the main body part 41.

[0121] A crack is formed between two adjacent protruding sub-parts 421, and the crack penetrates the entire protruding part 42 along the direction extending from the first end 421a to the second end 421b.

[0122] The crack between two adjacent protruding sub-parts 421 can just extend to the connection position between the main body part 41 and the protruding part 42, or can extend to a part of the main body part 41.

[0123] In the embodiment of the present application, the protruding sub-parts 421 are directly connected to the main body part 41, so that the movable range of the protruding sub-parts 421 is larger, the protruding sub-parts 421 are more likely to be deformed, and the deformable amount is larger, which is beneficial to improving the effect of preventing particle dropping.

[0124] Figure 8 It is a partial structural schematic diagram of the separator and the battery cell of the battery device provided in some other embodiments of the present application. In some other embodiments, referring to Figure 8 , the protruding part 42 further includes a connecting sub-part 422 surrounding the electrode terminal 13. One side of the connecting sub-part 422 is connected to the main body part 41, and the other ends of the protruding sub-parts 421 are connected to the other side of the connecting sub-part 422. In other words, the connecting sub-part 422 is connected between the protruding sub-parts 421 and the main body part 41, and the protruding sub-parts 421 are indirectly connected to the main body part 41 through the connecting sub-part 422.

[0125] A crack is formed between two adjacent protruding sub-parts 421, and the crack extends to the connection position between the connecting sub-part 422 and the protruding sub-parts 421 along the direction extending from the first end 421a to the second end 421b. That is to say, the crack only penetrates a part of the protruding part 42 along the protruding direction of the protruding part 42, and the part of the protruding part 42 that is not penetrated by the crack can form the connecting sub-part 422.

[0126] In the embodiments of the present application, by providing the connecting sub - part 422, the structural strength of the protruding part 42 can be improved to a certain extent, and the risk of fracture of the protruding sub - part 421 can be reduced.

[0127] Figure 9 It is a partial cross - sectional structure schematic diagram of a battery device provided by some other embodiments of the present application. In some embodiments, referring to Figure 9 , along the direction X which is perpendicular to the thickness direction of the wall part 111, at least part of the protruding part 42 bends and extends, and can deform in a direction away from the electrode terminal 13.

[0128] Exemplarily, the part of the electrode terminal 13 that extends beyond the wall part 111 can be cylindrical, and the direction perpendicular to the thickness direction X of the wall part 111 is the radial direction of the electrode terminal 13.

[0129] Optionally, at least part of the protruding part 42 can bend and extend along an arc - shaped curve, or can also bend and extend along a broken line. A part of the protruding part 42 can arch in a direction away from the wall part 111.

[0130] At least part of the protruding part 42 bends and extends. Under the action of external extrusion, the bent and extended part of the protruding part 42 can easily deform. Through the deformation of the protruding part 42, the assembly tolerance between the separator 40 and the electrode terminal 13 can be absorbed, which is beneficial to improving the assembly efficiency. That is, even if the relative positions of multiple battery cells 10 deviate from the separator 40 due to stacking or other reasons, the battery cells 10 can squeeze the protruding part 42 to deform it so as to assemble the separator 40 and the battery cells 10 together.

[0131] In some embodiments, the cross - section of at least part of the protruding part 42 perpendicular to the circumferential direction of the electrode terminal is wavy. At least part of the protruding part 42 bends and extends along a wavy curve, and the bending of the protruding part 42 is smoother and more gentle, and it is not easy to break due to stress concentration.

[0132] In some embodiments, the battery cell 10 includes an insulating part 14. The insulating part 14 is connected to the wall part 111. The insulating part 14 at least partially surrounds the electrode terminal 13 and is fixed to the electrode terminal 13. The electrode terminal 13 extends beyond the insulating part 14 in a direction away from the electrode assembly 12. A part of the protruding sub - part 421 is located between the bus bar component 30 and the insulating part 14.

[0133] The insulating part 14 can surround at least part of the electrode terminal 13 and is fixed to the electrode terminal 13. The insulating part 14 is used to insulate and isolate the electrode terminal 13 and the wall part 111. Optionally, the insulating part 14 can be made of plastic.

[0134] The insulating member 14 can extend beyond the wall portion 111 in a direction away from the electrode assembly 12 to improve its insulation effect. The dimension by which the insulating member 14 extends beyond the wall portion 111 is smaller than the dimension by which the electrode terminal 13 extends beyond the wall portion 111. After the electrode terminal 13 is connected to the bus bar member 30, a gap can be formed between the insulating member 14 and the bus bar member 30.

[0135] A part of the protruding sub - portion 421 is located between the bus bar member 30 and the insulating member 14. Along the thickness direction X, the protruding sub - portion 421 can also cover or shield at least part of the insulating member 14 and the position where the insulating member 14 is in contact with the wall portion 111, further reducing the possibility of welding particles falling between the spacer 40 and the wall portion 111, being beneficial to improving the effect of preventing welding particles from falling, further reducing the short - circuit risk, and improving the reliability of the battery device 100.

[0136] In some embodiments, the portion of the electrode terminal 13 that extends beyond the insulating member 14 is spaced from the protruding sub - portion 421 in a direction perpendicular to the thickness direction X of the wall portion 111.

[0137] Optionally, along the thickness direction X, the projection of the portion of the electrode terminal 13 that extends beyond the insulating member 14 is separated from the projection of the protruding sub - portion 421. The projection of the portion of the electrode terminal 13 that extends beyond the insulating member 14 can be located within the projection of the avoidance hole 43.

[0138] A gap can be formed between the portion of the electrode terminal 13 that extends beyond the insulating member 14 and the protruding sub - portion 421 in a direction perpendicular to the thickness direction X of the wall portion 111, which is beneficial to reducing the interference phenomenon between the electrode terminal 13 and the protruding sub - portion 421 and improving the assembly efficiency.

[0139] The applicant recognizes that during the welding process of the bus bar member 30 and the electrode terminal 13, the portion of the spacer 40 located between the bus bar member 30 and the insulating member 14 may press against the insulating member 14 in a direction away from the bus bar member 30, lifting the bus bar member 30, affecting the welding between the bus bar member 30 and the electrode terminal 13. There may be problems such as poor soldering or other welding defects between the bus bar member 30 and the electrode terminal 13, affecting the connection reliability.

[0140] Therefore, in some embodiments, the thickness of the portion of the protruding sub - portion 421 located between the bus bar member 30 and the insulating member 14 is smaller than the dimension by which the electrode terminal 13 extends beyond the insulating member 14.

[0141] In one example, the thickness of the protruding sub - portion 421 is uniform. In another example, the thickness of the portion of the protruding sub - portion 421 located between the bus bar member 30 and the insulating member 14 is smaller than the thickness of other parts of the protruding sub - portion 421, which can appropriately increase the structural strength of the protruding sub - portion 421.

[0142] The portion of the protruding sub - part 421 located between the current - collecting component 30 and the insulating member 14 can abut against the current - collecting component 30.

[0143] Along the thickness direction X of the wall portion 111, the portion of the protruding sub - part 421 located between the current - collecting component 30 and the insulating member 14 can be spaced apart from the insulating member 14. The protruding sub - part 421 can block welding particles and will not affect the welding of the current - collecting component 30 and the electrode terminal 13 due to excessive thickness, which is beneficial to improving the welding effect of the current - collecting component 30 and the electrode terminal 13.

[0144] Figure 10 It is a partial cross - sectional structure schematic diagram of a battery device provided by some other embodiments of the present application. In some embodiments, referring to Figure 10 , the protruding sub - part 421 includes a first wall 4212 and a second wall 4213. The first wall 4212 abuts against the current - collecting component 30. The second wall 4213 is connected between the first wall 4212 and the main body portion 41. At least a part of the first wall 4212 is located between the current - collecting component 30 and the insulating member 14. The thickness of the portion of the first wall 4212 located between the current - collecting component 30 and the insulating member 14 is less than the thickness of the main body portion 41 and the thickness of the second wall 4213.

[0145] The whole of the first wall 4212 abuts against the current - collecting component 30, increasing the abutting area between the protruding sub - part 421 and the current - collecting component 30, which is beneficial to increasing the deformation degree of the protruding sub - part 421.

[0146] The second wall 4213 does not abut against the current - collecting component 30. In the thickness direction X, the projection of the second wall 4213 and the projection of the insulating member 14 do not overlap.

[0147] The thickness of the second wall 4213 can be the same as or different from the thickness of the main body portion 41.

[0148] In one example, the thickness of the first wall 4212 is uniform, that is, the thickness at any position of the first wall 4212 is the same. The thickness of the first wall 4212 is less than the thickness of the main body portion 41 and the thickness of the second wall 4213.

[0149] In another example, a part of the first wall 4212 close to the electrode terminal 13 is thinned and is located between the current - collecting component 30 and the insulating member 14. The thickness of the non - thinned part of the first wall 4212 can be the same as or different from the thickness of the main body portion 41 and the second wall 4213.

[0150] In the embodiments of the present application, the thicknesses of both the main body portion 41 and the second wall 4213 are set to be relatively large. The structural strength of the main body portion 41 and the second wall 4213 is relatively large, which is beneficial to improving the structural strength of the separator 40 and reducing the possibility of overall deformation of the separator 40.

[0151] In some embodiments, reference Figure 5 The electrode terminal 13 includes a terminal plate 131, which is located on the side of the wall portion 111 facing away from the electrode assembly 12. The terminal plate 131 is rectangular, and the protrusion 42 matches the shape of the terminal plate 131. At least part of the protrusion 421 is formed at the corner of the protrusion 42.

[0152] The electrode terminal 13 may further include a connecting portion for connecting the terminal plate 131 and the electrode assembly 12, wherein the connecting portion passes through the wall portion 111. The terminal plate 131 and the connecting portion may be connected by welding or other suitable means.

[0153] The protrusion 42 encloses a substantially rectangular space so as to mate with the terminal plate 131 .

[0154] At least a portion of the protruding sub-portion 421 has a smaller width along the circumference of the electrode terminal 13 , which can be used to form a corner of the protruding portion 42 .

[0155] The protrusion 42 has four corners, which can be formed by four protruding sub-parts 421 with smaller widths. The four protruding sub-parts 421 forming the corners of the protrusion 42 are respectively arranged corresponding to the four corners of the terminal plate 131.

[0156] The plurality of protruding sub-portions 421 may further include four protruding sub-portions 421 with larger widths, where the protruding sub-portions 421 with larger widths are located between two adjacent corners of the protruding portion 42 .

[0157] In this embodiment of the present application, the shape of the protrusion 42 is configured to match the shape of the terminal plate 131. This allows for uniform spacing between each protrusion 421 and the terminal plate 131, thereby improving the particle prevention effect. At least some of the protrusions 421 are formed at the corners of the protrusion 42, which facilitates the formation of a smaller gap between adjacent protrusions 421, further improving the particle prevention effect.

[0158] In some embodiments, the protruding sub-portions 421 formed at the corners of the protruding portion 42 have an arc-shaped cross-section perpendicular to the wall thickness direction X, and the other protruding sub-portions 421 have a strip-shaped cross-section perpendicular to the wall thickness direction X.

[0159] The cross section of the protruding sub-portion 421 formed at the corner of the protruding portion 42 is arc-shaped, so that the corner of the protruding portion 42 is smoother and the transition is more gradual. The remaining protruding sub-portions 421 extend straight between two adjacent corners.

[0160] In some embodiments, the protrusion 421 has a first end 421a and a second end 421b, the first end 421a is connected to the main body 41, and the second end 421b is abutted against the conduit component 30. The protrusion 421 forming the corner of the protrusion 42 gradually decreases in size along the circumference of the electrode terminal 13 along the direction extending from the first end 421a to the second end 421b.

[0161] Optionally, along the direction extending from the first end 421 a to the second end 421 b , the dimensions of the remaining protruding sub-portions 421 along the circumferential direction of the electrode terminal 13 may gradually decrease or remain unchanged.

[0162] Before assembly, a gap can be formed between any two adjacent protruding sub-portions 421, and the size of the gap along the circumference of the electrode terminal 13 gradually increases along the protruding direction of the protruding portion 42. After assembly, the protruding sub-portion 421 can deform closer to the electrode terminal 13, and a better fit can be formed between the two adjacent protruding sub-portions 421.

[0163] In the embodiment of the present application, the circumferential dimensions of the protruding sub-portions 421 used to form the corners of the protruding portion 42 along the electrode terminal 13 are set to gradually decrease along the protruding direction of the protruding portion 42. Before assembly, a gap can be formed between any two adjacent protruding sub-portions 421 to provide space for the deformation of the protruding sub-portions 421, thereby reducing the possibility of interference when two adjacent protruding sub-portions 421 are deformed during the assembly process.

[0164] Figure 11 1 is a schematic diagram of the exploded structure of the separator and battery cells of the battery device provided in some embodiments of the present application. Figure 12 yes Figure 11 FIG. 1 is a schematic diagram of the enlarged structure of the middle region C. In other embodiments, referring to FIG. Figure 11 and Figure 12 The electrode terminal 13 includes a terminal plate 131, which is located on the side of the wall portion 111 away from the electrode assembly 12. The terminal plate 131 is cylindrical, and the protrusion 42 matches the shape of the terminal plate 131. Multiple protrusions 421 are evenly distributed along the circumference of the electrode terminal 13.

[0165] The protrusion 42 encloses a substantially cylindrical space so as to mate with the terminal plate 131 .

[0166] The projection of each protruding sub-portion 421 along the thickness direction X may be fan-shaped, and the projections of each protruding sub-portion 421 are located on the same circular ring.

[0167] The plurality of protruding sub-portions 421 are evenly distributed along the circumference of the electrode terminal 13 , and the degree of deformation of each protruding sub-portion 421 is relatively uniform, which is conducive to forming a circular avoidance hole 43 that matches the terminal plate 131 and improving the effect of preventing particles from falling.

[0168] In some embodiments, the spacer 40 is provided with an avoidance hole 43, and a plurality of protruding sub-parts 421 are arranged along the outer periphery of the avoidance hole 43. A part of the electrode terminal 13 is exposed to the side of the spacer 40 facing the current collecting component 30 through the avoidance hole 43 and is connected to the current collecting component 30.

[0169] The part of the electrode terminal 13 that extends beyond the insulating part 14 can be exposed to the side of the spacer 40 facing the current collecting component 30 through the avoidance hole 43.

[0170] Along the thickness direction X, the surface of the electrode terminal 13 facing away from the electrode assembly 12 is connected to the current collecting component 30.

[0171] A plurality of protruding sub-parts 421 are arranged along the outer periphery of the avoidance hole 43. The size of the avoidance hole 43 can be reduced by the deformation of the protruding sub-parts 421 towards the electrode terminal 13, so as to block the welding particles from falling onto the wall part 111 on the basis of facilitating assembly, which is beneficial to reducing the short-circuit risk and improving the reliability.

[0172] In some embodiments, referring to Figure 3 and Figure 4 , the housing 11 includes a housing body 11a and an end cover 11b. The housing body 11a has an opening 11a1, and the end cover 11b covers the opening 11a1. The wall part 111 is the end cover 11b.

[0173] Exemplarily, one side of the housing body 11a along the thickness direction X has an opening 11a1, and the end cover 11b covers the opening 11a1.

[0174] As another example, both sides of the housing body 11a along the thickness direction X have openings 11a1, the number of end covers 11b is two, and the two end covers 11b respectively cover the two openings 11a1. The wall part 111 is one of the end covers 11b.

[0175] According to the second aspect of the present application, the embodiments of the present application further provide an electrical device, and the electrical device includes the battery device 100 provided in any embodiment of the present application, and the battery device 100 is used to provide electrical energy.

[0176] An embodiment of the present application provides a battery device 100, which includes battery cells 10, a busbar component 30, and a spacer 40. The battery cell 10 includes a housing 11, an electrode assembly 12, and an electrode terminal 13. The electrode assembly 12 is disposed within the housing 11. The housing 11 includes a wall portion 111. The electrode terminal 13 is disposed on the wall portion 111 and connected to the electrode assembly 12. The electrode terminal 13 extends beyond the wall portion 111 in a direction away from the electrode assembly 12. At least a part of the busbar component 30 is located on a side of the electrode terminal 13 away from the electrode assembly 12 and connected to the electrode terminal 13. The spacer 40 includes a main body portion 41 and a protruding portion 42, and is provided with an avoidance hole 43 for avoiding the electrode terminal 13. The main body portion 41 is disposed on a side of the wall portion 111 away from the electrode assembly 12 and abuts against the wall portion 111. The main body portion 41 has a first surface 411 facing away from the wall portion 111. At least a part of the protruding portion 42 protrudes from the first surface 411 in a direction away from the wall portion 111. Along a direction of the thickness direction X perpendicular to the wall portion 111, at least a part of the protruding portion 42 extends in a wavy shape and can be deformed in a direction away from the electrode terminal 13. The protruding portion 42 includes a plurality of protruding sub-portions 421. The plurality of protruding sub-portions 421 are disposed along the outer periphery of the electrode terminal 13. One end of the protruding sub-portion 421 away from the main body portion 41 abuts against the busbar component 30. Adjacent two protruding sub-portions 421 are separated. Before the busbar component 30 and the battery cell 10 are assembled, there is a gap between adjacent two protruding sub-portions 421. And along the thickness direction X of the wall portion 111, the distance between the portion of the main body portion 41 for abutting against the wall portion 111 and the end of the protruding sub-portion 421 for abutting against the busbar component 30 is greater than the dimension of the electrode terminal 13 extending beyond the wall portion 111. After assembly, the protruding sub-portion 421 can be deformed in a direction close to the electrode terminal 13 under the pressing action of the busbar component 30 and the wall portion 111, so that the avoidance hole 43 of the spacer 40 is reduced.

[0177] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit 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 make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the specification 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 falling within the scope of the claims.

Claims

1. A battery device, characterized in that, Comprising: A battery cell, including a housing, an electrode assembly, and an electrode terminal. The electrode assembly is disposed within the housing. The housing includes a wall portion, and the electrode terminal is disposed on the wall portion and connected to the electrode assembly. The electrode terminal extends beyond the wall portion in a direction away from the electrode assembly; A current collecting component, at least a part of which is located on a side of the electrode terminal away from the electrode assembly and is connected to the electrode terminal; And An insulator, including a main body portion and a protruding portion. The main body portion is disposed on a side of the wall portion away from the electrode assembly and abuts against the wall portion. The main body portion has a first surface facing away from the wall portion, and at least a part of the protruding portion protrudes from the first surface in a direction away from the wall portion; The protruding portion includes a plurality of protruding sub-portions, and the plurality of protruding sub-portions are arranged along the outer circumference of the electrode terminal. One end of the protruding sub-portion is connected to the main body portion, and the other end of the protruding sub-portion abuts against the current collecting component. Adjacent two of the protruding sub-portions are separated from each other.

2. The battery device according to claim 1, wherein Each of the protruding sub-portions has two side surfaces along the circumferential direction of the electrode terminal, and the relatively arranged side surfaces of adjacent two of the protruding sub-portions are in contact with each other.

3. The battery device according to claim 1, wherein The protruding sub-portion includes a first end and a second end. The first end is connected to the main body portion, and the second end abuts against the current collecting component. Along the direction extending from the first end to the second end, at least one of the protruding sub-portions gradually decreases in size along the circumferential direction of the electrode terminal.

4. The battery device according to claim 1, wherein The protruding sub-portion is directly connected to the main body portion; or, The protruding portion further includes a connecting sub-portion surrounding the electrode terminal. One side of the connecting sub-portion is connected to the main body portion, and each of the protruding sub-portions is connected to the other side of the connecting sub-portion.

5. The battery device according to claim 1, wherein Along the direction perpendicular to the thickness direction of the wall portion, at least a part of the protruding portion is bent and extended, and can be deformed in a direction away from the electrode terminal.

6. The battery device according to claim 5, wherein The cross-section of at least a part of the protruding portion perpendicular to the circumferential direction of the electrode terminal is wavy.

7. The battery device according to claim 1, wherein The battery cell includes an insulating member, the insulating member is connected to the wall portion, the insulating member at least partially surrounds the electrode terminal and is fixed to the electrode terminal, and the electrode terminal extends beyond the insulating member in a direction away from the electrode assembly; A part of the protruding sub-portion is located between the current collecting component and the insulating member.

8. The battery device according to claim 7, wherein The part of the electrode terminal extending beyond the insulating member is spaced apart from the protruding sub-portion along the direction perpendicular to the thickness direction of the wall portion.

9. The battery device according to claim 7, wherein A thickness of a portion of the protrusion located between the bus member and the insulating member is smaller than a dimension of the electrode terminal protruding from the insulating member.

10. The battery device according to claim 7, characterized in that The protruding portion includes a first wall and a second wall, the first wall abuts against the current collecting component, the second wall is connected between the first wall and the main body, and at least a portion of the first wall is located between the current collecting component and the insulating member; A thickness of a portion of the first wall located between the current collecting member and the insulating member is smaller than a thickness of the main body portion and a thickness of the second wall.

11. The battery device according to claim 1, wherein: The electrode terminal includes a terminal plate, the terminal plate is located on a side of the wall portion away from the electrode assembly, the terminal plate is rectangular, and the protrusion matches the shape of the terminal plate; At least part of the protruding sub-portions is formed at corners of the protruding portion.

12. The battery device according to claim 11, wherein: The protruding sub-portions formed at the corners of the protruding portion have an arc-shaped cross section perpendicular to the thickness direction of the wall portion, and the other protruding sub-portions have a strip-shaped cross section perpendicular to the thickness direction of the wall portion.

13. The battery device according to claim 11, wherein: The protruding portion includes a first end and a second end, the first end is connected to the main body, the second end is abutted against the conduit component, and the protruding portion formed at the corner of the protruding portion gradually decreases in size along the circumference of the electrode terminal along the direction extending from the first end to the second end.

14. The battery device according to claim 1, wherein: The electrode terminal includes a terminal plate, the terminal plate is located on a side of the wall portion away from the electrode assembly, the terminal plate is cylindrical, and the protrusion matches the shape of the terminal plate; The plurality of protruding sub-portions are evenly distributed along the circumference of the electrode terminal.

15. The battery device according to claim 1, wherein: The isolating member is provided with an avoidance hole, the plurality of protruding sub-portions are arranged along the periphery of the avoidance hole, a portion of the electrode terminal is exposed through the avoidance hole to a side of the isolating member facing the current collecting component and is connected to the current collecting component.

16. The battery device according to claim 1, wherein: The housing includes a shell and an end cover. The shell has an opening. The end cover covers the opening. The wall portion serves as the end cover.

17. An electrical device, characterized in that, The battery device comprises a battery device according to any one of claims 1 to 16, wherein the battery device is used to provide electrical energy.

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