Battery monomer, battery and electric device

Abstract

The utility model provides a battery monomer, a battery and a power utilization device. The battery monomer comprises a shell, an electrode assembly and a switching assembly, the shell comprises a shell body and an anti-explosion valve, and the anti-explosion valve is installed on the shell body; the electrode assembly is mounted in the shell and comprises an electrode main body and a tab; the switching assembly is installed in the shell, the switching assembly comprises a first switching piece, the first switching piece is located between the anti-explosion valve and the electrode body in the first direction and connected with the shell and the electrode lug, a first channel is formed in the first switching piece, and a second channel is formed in the second direction. The first channel penetrates through the first adapter in the first direction. The gas generated by the electrode main body can be led to the area where the explosion-proof valve is located through the first channel, so that the gas accumulation in the area where the electrode main body is located can be reduced, the expansion of the shell is inhibited, the opening of the explosion-proof valve is facilitated, and the safety is improved.

Description

Technical Field

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

[0002] With the development of new energy technologies, batteries are used more and more widely, such as in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric airplanes and power tools.

[0003] Cylindrical batteries are a common type of battery. An adapter plate is typically installed between the cover and electrode assembly to connect the two for power transmission. However, the top cover of cylindrical batteries is small, and the adapter plate is blocked between the electrode assembly and the explosion-proof valve of the cover, which can prevent gases generated by the electrode assembly from reaching the explosion-proof valve. Utility Model Content

[0004] In view of the above problems, the present application provides a battery cell, a battery and an electrical device, wherein the battery cell is conducive to exhaust of the electrode assembly.

[0005] In the first aspect, some embodiments of the present application provide a battery cell, which includes a shell, an electrode assembly and a adapter assembly; the shell includes a shell and an explosion-proof valve, and the explosion-proof valve is installed on the shell; the electrode assembly is installed in the shell, and the electrode assembly includes an electrode body and a tab; the adapter assembly is installed in the shell, and the adapter assembly includes a first adapter, and along the first direction, the first adapter is located between the explosion-proof valve and the electrode body, and is respectively connected to the shell and the tab, and a first channel is provided on the first adapter, and the first channel passes through the first adapter along the first direction.

[0006] In the technical solution of the above embodiment, the first channel extends through the first adapter along the first direction, enabling medium flow between the electrode body area and the explosion-proof valve area without hindering exhaust from the electrode body. Gas generated by the electrode body can flow to the explosion-proof valve area through the first channel, thereby reducing gas accumulation in the electrode body area, inhibiting expansion of the housing, facilitating the opening of the explosion-proof valve, and improving safety.

[0007] According to some embodiments of the present application, the battery cell includes a first adapter member and a first current collecting member connected to the tab. The first current collecting member is provided with a first channel, which includes a first main channel and a first auxiliary channel. From the center of the first current collecting member to the outer edge, the first auxiliary channel and the first main channel are arranged in that order. The area of ​​the first main channel is larger than that of the first auxiliary channel. The first adapter member is connected to the first current collecting member and the housing, respectively. The first main channel and the first auxiliary channel form a double safety mechanism, increasing the medium flow path and facilitating exhaust from the electrode body.

[0008] In some embodiments of the present application, the battery cell provides a first current collecting portion that is fan-shaped and connected to the first adapter portion at the central angle of the fan-shaped portion. The first adapter portion is disc-shaped and, in a first direction, is located between the first current collecting portion and the explosion-proof valve. The first adapter can both transmit current and provide power-off protection.

[0009] According to the battery cells provided in some embodiments of the present application, the first main channel is arc-shaped, and the center of the arc coincides with the axis of the first collecting portion; the first auxiliary channel is rectangular, circular, triangular, trapezoidal, diamond-shaped or any combination thereof to facilitate exhaust of the electrode body.

[0010] According to some embodiments of the present application, the battery cell adapter assembly further includes a second adapter located between the explosion-proof valve and the electrode body along the first direction and connected to the housing and the tab, respectively. The second adapter is spaced apart from the first adapter. The second adapter is provided with a second channel extending through the second adapter along the first direction. The second adapter can both transmit current and facilitate exhaust from the electrode body.

[0011] According to some embodiments of the present application, the second adapter includes a second current collecting portion and a second adapter portion. The second current collecting portion is connected to the tab, and the second channel is located on the second current collecting portion. The second channel includes a second main channel and a second auxiliary channel. The second auxiliary channel and the second main channel are arranged in order from the center to the outer edge of the second current collecting portion. The area of ​​the second main channel is larger than that of the second auxiliary channel. Along the first direction, the second adapter portion is located between the second current collecting portion and the explosion-proof valve, and is connected to the second current collecting portion and the housing, respectively. The second main channel and the second auxiliary channel form a dual safety mechanism, increasing the medium flow path and facilitating exhaust of the electrode body.

[0012] According to some embodiments of the present application, the battery cell has a second current collecting section with a fan-shaped, central corner having a clearance groove for circumventing the first adapter. The second adapter is connected to the arc edge of the second current collecting section and is annular in shape, with its axis coinciding with the axis of the second current collecting section. The second adapter can both transmit current and provide power-off protection.

[0013] According to the battery cell provided in some embodiments of the present application, the second main channel is arc-shaped, and the center of the arc coincides with the axis of the second collecting portion; the second auxiliary channel is rectangular, circular, triangular, trapezoidal, diamond-shaped or any combination thereof to facilitate exhaust of the electrode body.

[0014] According to the battery cell provided in some embodiments of the present application, the adapter assembly also includes a first insulating part, including a mounting portion, which is respectively connected to the first collecting portion and the second collecting portion, and is used to isolate the first adapter from the second adapter; a third channel is provided on the mounting portion, and the third channel passes through the mounting portion along the first direction to facilitate the exhaust of the electrode body to reach the explosion-proof valve.

[0015] According to the battery cell provided in some embodiments of the present application, there are multiple third channels, and in the second direction, the multiple third channels are symmetrically arranged, and the second direction is perpendicular to the first direction; the third channel includes a third main channel and a third auxiliary channel, and along the center to the outer edge of the mounting portion, there are the third auxiliary channel and the third main channel, respectively, and the area of ​​the third main channel is larger than that of the third auxiliary channel; the third main channel is arc-shaped, and the center of the arc coincides with the axis of the mounting portion; the third auxiliary channel is any one of rectangular, circular, triangular, trapezoidal, and diamond-shaped, or a combination thereof, to facilitate exhaust of the electrode body.

[0016] According to some embodiments of the present application, the battery cell provided herein has a mounting portion located between the first current collecting portion and the second current collecting portion along the third direction, with the third direction, the second direction, and the first direction all being perpendicular. The first current collecting portion, the second current collecting portion, and the mounting portion are coplanar, thereby increasing the energy density of the battery cell.

[0017] According to the battery cell provided in some embodiments of the present application, the first insulating part also includes a supporting portion, which is annular and connected to the outer peripheral surface of the mounting portion; along the first direction, the second adapter portion is located between the explosion-proof valve and the supporting portion, and the supporting portion is in contact with the second adapter portion, which can improve the structural strength of the first insulating part and provide support for the second adapter portion.

[0018] According to the battery cells provided in some embodiments of the present application, the first current collecting part and the second current collecting part are both provided with overlapping edges; along the first direction, the overlapping edge is located between the explosion-proof valve and the mounting part, and is in contact with the mounting part; a plug-in protrusion is provided on the mounting part, and a socket is provided on the overlapping edge, and the plug-in protrusion is plug-connected to the socket, which can improve the connection strength between the first current collecting part, the second current collecting part and the mounting part.

[0019] According to the battery cell provided in some embodiments of the present application, the adapter assembly also includes a second insulating member, which is located between the explosion-proof valve and the overlapping edge along the first direction; the second insulating member is annular, with an avoidance hole provided in the center, and the first adapter portion is inserted into the avoidance hole; a fourth channel is provided on the second insulating member, and the fourth channel passes through the second insulating member along the first direction to facilitate the exhaust of the electrode body to enter the area where the explosion-proof valve is located.

[0020] According to the battery cells provided in some embodiments of the present application, the fourth channel is arc-shaped, and the center of the arc coincides with the axis of the second insulating member; there are multiple fourth channels, and they are distributed in a circular array around the axis of the second insulating member; along the first direction, the projection of the fourth channel at least partially overlaps with the projection of the first channel, the projection of the second channel, and the projection of the third channel, so as to facilitate exhaust of the electrode body.

[0021] According to the battery cell provided in some embodiments of the present application, the shell is cylindrical; the tabs include a positive tab and a negative tab, and along the first direction, the positive tab and the negative tab are both located between the explosion-proof valve and the electrode body; the positive tab is fan-shaped and connected to the first adapter; the negative tab is fan-shaped and connected to the second adapter, thereby providing a cylindrical battery with positive and negative electrodes output on the same side, and the exhaust of the electrode body can easily enter the area where the explosion-proof valve is located.

[0022] In a second aspect, some embodiments of the present application provide a battery comprising the battery cell provided by the above technical solution.

[0023] In a third aspect, some embodiments of the present application provide an electrical device, which includes a battery provided by the above technical solution, and the battery is used to supply power.

[0024] The technical solutions provided by the embodiments of the present disclosure bring at least the following beneficial effects:

[0025] The embodiments of the present application provide a battery cell, a battery, and an electrical device. The battery cell includes a housing, an electrode assembly, and an adapter assembly. The housing includes a shell and an explosion-proof valve mounted on the shell. The electrode assembly includes an electrode body and a tab. The adapter assembly includes a first adapter. Along a first direction, the first adapter is located between the explosion-proof valve and the electrode body. A first channel passes through the first adapter, and the first adapter does not hinder the exhaust of the electrode body. The gas generated by the electrode body can be passed to the area where the explosion-proof valve is located through the first channel, thereby reducing gas accumulation in the area where the electrode body is located, suppressing shell expansion, facilitating the opening of the explosion-proof valve, and improving safety.

[0026] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. Throughout the accompanying drawings, the same reference numerals are used to denote the same components.

[0028] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0029] Figure 2 A schematic diagram of disassembly of a battery provided in some embodiments of the present application;

[0030] Figure 3 A schematic structural diagram of a battery cell provided in some embodiments of the present application;

[0031] Figure 4 A schematic diagram of a disassembled adapter assembly provided in some embodiments of the present application;

[0032] Figure 5 A schematic structural diagram of a first insulating member provided in some embodiments of the present application;

[0033] Figure 6 A schematic structural diagram of a second insulating member provided in some embodiments of the present application;

[0034] Figure 7 A schematic structural diagram of a first adapter provided in some embodiments of the present application;

[0035] Figure 8 This is a schematic structural diagram of the second adapter provided in some embodiments of the present application.

[0036] In the attached figure:

[0037] 1000-Vehicle; 100-Battery; 200-Controller; 300-Motor;

[0038] 10-battery module; 20-box; 21-first box; 22-second box;

[0039] 1-battery cell; 2-housing; 21-electrode terminal; 22-explosion-proof valve; 23-cover plate; 24-housing body; 3-adapter assembly;

[0040] 31 - first insulating member; 311 - mounting portion; 3111 - plug-in protrusion; 312 - supporting portion; 313 - third channel; 3131 - third main channel; 3132 - third auxiliary channel;

[0041] 32-second insulating member; 321-fourth channel; 322-avoidance hole;

[0042] 33-first adapter; 331-first adapter portion; 332-first collector portion; 333-first channel; 3331-first main channel; 3332-first auxiliary channel; 334-lap edge; 3341-jack;

[0043] 34-second adapter; 341-second adapter portion; 342-second collector portion; 343-second channel; 3431-second main channel; 3432-second auxiliary channel;

[0044] X-third direction; Y-second direction; Z-first direction. DETAILED DESCRIPTION

[0045] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0046] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0047] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0048] In addition, the technical terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0049] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0050] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0051] The battery cell 1 mentioned in the embodiment of the present application may be a secondary battery cell. A secondary battery cell refers to a battery cell that can be continuously used by activating the active material by charging after the battery cell 1 is discharged.

[0052] The battery cell 1 may be an ion battery cell, and the ion battery cell includes but is not limited to a lithium ion battery cell, a sodium ion battery cell, a sodium lithium ion battery cell, a magnesium ion battery cell, and a calcium ion battery cell.

[0053] A battery cell 1 typically includes an electrode assembly. This assembly comprises an electrode body, which includes a positive electrode sheet, a negative electrode sheet, and a separator. During the charge and discharge process of the battery cell 1, active ions (e.g., lithium ions) are inserted and removed between the positive and negative electrode sheets. The separator, positioned between the positive and negative electrode sheets, prevents short circuits and provides ion channels for the active ions to pass through.

[0054] In some embodiments, the battery cell 1 further includes an electrolyte, which functions to conduct ions between the positive and negative electrodes. The electrolyte may be in liquid, gel, or solid form.

[0055] In some embodiments, the electrode assembly is provided with tabs that can conduct current away from the electrode body. The tabs include a positive electrode tab and a negative electrode tab.

[0056] In some embodiments, the battery cell 1 may include a housing 2. The housing 2 is used to encapsulate components such as the electrode assembly and the electrolyte. The housing 2 may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0057] The battery 100 mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells 1 to provide higher voltage and capacity.

[0058] In some embodiments, the battery 100 may be a battery module 10 . When there are multiple battery cells 1 , the multiple battery cells 1 are arranged and fixed to form a battery module 10 .

[0059] In some embodiments, the battery 100 may be a battery pack, which includes a case 20 and a battery cell 1 . The battery cell 1 or the battery module 10 is accommodated in the case 20 .

[0060] In some embodiments, the box 20 may serve as part of the chassis structure of the vehicle 1000. For example, a portion of the box 20 may form at least a portion of the floor of the vehicle 1000, or a portion of the box 20 may form at least a portion of the cross member and longitudinal member of the vehicle 1000.

[0061] In some embodiments, the battery 100 may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0062] With the large-scale application of cylindrical batteries, the limitations of cylindrical batteries have gradually become apparent. An adapter is required to connect the cover plate and the electrode assembly of the cylindrical battery. However, due to the small size of the cover plate of the cylindrical battery and the limited space in the axial direction of the cylindrical battery, the exhaust of the electrode assembly is easily hindered by the adapter, which can easily cause the cylindrical battery to expand, posing a safety risk.

[0063] In view of this, an embodiment of the present application provides a technical solution, wherein a battery cell 1 includes a housing 2, an electrode assembly, and an adapter assembly 3; the housing 2 includes a shell and an explosion-proof valve 22, the explosion-proof valve 22 being mounted on the shell; the electrode assembly is mounted within the shell, and the electrode assembly includes an electrode body and a tab; the adapter assembly 3 is mounted within the shell, and the adapter assembly 3 includes a first adapter 33. The first adapter 33 is located between the explosion-proof valve 22 and the electrode body along a first direction Z, and is connected to the shell and the tab, respectively. The first adapter 33 is provided with a first channel 333. The first channel 333 passes through the first adapter 33 along the first direction Z, enabling medium flow between the electrode body region and the explosion-proof valve 22 region without hindering exhaust from the electrode body. Gas generated by the electrode body can flow to the explosion-proof valve 22 region through the first channel 333, thereby reducing gas accumulation in the electrode body region, inhibiting shell expansion, facilitating the opening of the explosion-proof valve 22, and improving safety.

[0064] The technical solutions described in the embodiments of the present application are applicable to a battery 100 and an electrical device using the battery 100 , which may be a vehicle 1000 , a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle 1000 may be a fuel vehicle, a gas vehicle, or a new energy vehicle, wherein the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. The electric tools may include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0065] The battery described in the embodiments of the present application is not limited to being applicable to the electrical devices described above, but for the sake of simplicity, the following embodiments are described using electric vehicles as an example.

[0066] Please refer to Figure 1 , Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application.

[0067] The vehicle 1000 may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc. A battery 100 is provided inside the vehicle 1000. The battery 100 may be provided at the bottom, head, or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000. For example, the battery 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements for starting, navigating, and driving the vehicle 1000.

[0068] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0069] Please refer to Figure 2 , Figure 2 Schematic diagram of the disassembly of the battery provided in some embodiments of the present application.

[0070] The battery 100 includes a housing 20 and a battery cell 1, and the battery cell 1 is housed in the housing 20. The housing 20 is used to provide a placement location for the battery cell 1. There may be multiple battery cells 1 in the battery 100, and the multiple battery cells 1 may be connected in series, in parallel, or in a mixed connection. Mixed connection means that the multiple battery cells 1 are both connected in series and in parallel. The multiple battery cells 1 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 1 is housed in the housing 20; of course, the battery 100 can also be in the form of a battery module 10 composed of multiple battery cells 1 first connected in series, in parallel, or in a mixed connection, and the multiple battery modules 10 are then connected in series, in parallel, or in a mixed connection to form a whole, and housed in the housing 20.

[0071] The housing 20 may include a first housing 21 and a second housing 22. The first housing 21 and the second housing 22 may overlap to define a placement area for accommodating the battery cells. The first housing 21 and the second housing 22 may be of various shapes, such as a rectangular parallelepiped or a cylinder. The first housing 21 may be a hollow structure with one side open, and the second housing 22 may also be a hollow structure with one side open. The open side of the second housing 22 overlaps the open side of the first housing 21, forming the housing 22 with a placement space.

[0072] The battery 100 may further include other structures. For example, the battery 100 may further include a busbar component for achieving electrical connection between the plurality of battery cells 1 .

[0073] Please refer to Figure 3 、 Figure 4 and Figure 7 , Figure 3 A schematic structural diagram of a battery cell provided in some embodiments of the present application; Figure 4 A schematic diagram of a disassembled adapter assembly provided in some embodiments of the present application; Figure 7 This is a schematic structural diagram of the first adapter provided in some embodiments of the present application.

[0074] On the first aspect, some embodiments of the present application provide a battery cell 1, which includes an outer shell 2, an electrode assembly and an adapter assembly 3. The outer shell 2 includes a shell and an explosion-proof valve 22, and the explosion-proof valve 22 is installed on the shell; the electrode assembly is installed in the shell, and the electrode assembly includes an electrode body and a tab; the adapter assembly 3 is installed in the shell, and the adapter assembly 3 includes a first adapter 33. Along the first direction Z, the first adapter 33 is located between the explosion-proof valve 22 and the electrode body, and is respectively connected to the shell and the tab. A first channel 333 is provided on the first adapter 33, and along the first direction Z, the first channel 333 passes through the first adapter 33.

[0075] The housing has a storage space inside. The housing includes a housing body and a cover plate 23 disposed at at least one end of the housing body. The cover plate 23 is provided with an electrode terminal 21 and an explosion-proof valve 22. The electrode terminal 21 is insulated from the cover plate 23. The electrode assembly is installed in the storage space within the housing. The tabs include a positive tab and a negative tab. The positive tab and the negative tab can extend from the same end of the electrode body or from both ends of the electrode body. When the first adapter 33 is connected to the tab and the housing respectively, the first adapter 33 can be connected to the electrode terminal 21 and the tab (positive tab or negative tab) respectively, or the first adapter 33 can be connected to the cover plate 23 and the tab (positive tab or negative tab) respectively.

[0076] In the technical solution of the above embodiment, the battery cell includes a housing 2, an electrode assembly, and an adapter assembly 3. The housing 2 includes a shell and an explosion-proof valve 22 mounted on the shell. The electrode assembly includes an electrode body and a tab. The adapter assembly 3 includes a first adapter 33. Along a first direction Z, the first adapter 33 is located between the explosion-proof valve 22 and the electrode body. A first channel 333 is provided on the first adapter 33. The first channel 333 passes through the first adapter 33 along the first direction Z, enabling the flow of medium (gas and / or liquid) between the area where the electrode body is located and the area where the explosion-proof valve 22 is located, without hindering the exhaust of the electrode body. The gas generated by the electrode body can be passed to the area where the explosion-proof valve 22 is located through the first channel 333, thereby reducing gas accumulation in the area where the electrode body is located, suppressing shell expansion, facilitating the opening of the explosion-proof valve 22, and improving safety.

[0077] In some embodiments of the present application, Figure 7 As shown, the first adapter 33 includes a first collecting part 332 and a first adapter part 331. The first collecting part 332 is connected to the pole ear. The first collecting part 332 is provided with a first channel 333. The first channel 333 includes a first main channel 3331 and a first auxiliary channel 3332. From the center to the outer edge of the first collecting part 332, there are the first auxiliary channel 3332 and the first main channel 3331 in sequence. The area of ​​the first main channel 3331 is larger than that of the first auxiliary channel 3332. The first adapter part 331 is respectively connected to the first collecting part 332 and the shell.

[0078] The first current collecting portion 332 and the first adapter portion 331 can be integrally formed or separately formed and then connected. The first adapter 33 serves as a conductor. The first current collecting portion 332 is connected to the tab (either the positive or negative tab), collecting the current from the tab and transferring it to the first adapter portion 331. The first adapter portion 331 is connected to the housing (either the cover plate 23 or the electrode terminal 21), transmitting current to the housing.

[0079] In the technical solution of the above embodiment, a first channel 333 is provided on the first flow collecting portion 332, which collects current without obstructing the exhaust of the electrode assembly. The first channel 333 comprises a first main channel 3331 and a first auxiliary channel 3332. This dual-channel design, firstly, increases the flow path for the medium and secondly, provides a double insurance mechanism to prevent obstruction of the electrode assembly exhaust caused by blockage of a single channel. The first main channel 3331, serving as the primary channel for the medium, has a larger area than the first auxiliary channel 3332, thereby improving the flow of the medium.

[0080] In some embodiments of the present application, Figure 7 As shown, the first collecting portion 332 is fan-shaped and connected to the first adapter portion 331 at the central angle of the fan; the first adapter portion 331 is disc-shaped, and in the first direction Z, the first adapter portion 331 is located between the first collecting portion 332 and the explosion-proof valve 22.

[0081] From the center to the outer edge of the housing, the first adapter portion 331 and the first current collecting portion 332 are integrally formed. In the first direction Z, the first adapter portion 331 is located between the first current collecting portion 332 and the explosion-proof valve 22. The first adapter portion 331 contacts the housing, while the first current collecting portion 332 does not. The first current collecting portion 332 collects the current from the tabs and transmits it to the housing (the cover plate 23 or the electrode terminal 21) through the first adapter portion 331.

[0082] In the technical solution of the above embodiment, the first collecting part 332 is fan-shaped, and the first adapter part 331 is connected to the central angle of the first collecting part 332, which can reduce the cross-sectional area at the junction of the first adapter part 331 and the first collecting part 332, so that the first adapter 33 can safely transmit current when the current is normal, and can fuse when the current is abnormal (significantly increased) to reduce the risk and achieve power-off protection.

[0083] In some embodiments of the present application, Figure 7 As shown, the first main channel 3331 is arc-shaped, and the arc center coincides with the axis of the first collecting portion 332; the first auxiliary channel 3332 is rectangular, circular, triangular, trapezoidal, diamond-shaped or any combination thereof.

[0084] The first auxiliary channel 3332 is located between the first main channel 3331 and the first adapter 331. There can be one or more first auxiliary channels 3332. When there is one first auxiliary channel 3332, its shape can be any of rectangular, circular, triangular, trapezoidal, or rhombus-shaped. When there are multiple first auxiliary channels 3332, their shapes can be any combination of the aforementioned shapes. There can be only one first main channel 3331. The arc center of the first main channel 3331 coincides with the axis of the first manifold 332, and the central angle of the first main channel 3331 is smaller than the central angle of the first manifold 332.

[0085] In the technical solution of the above embodiment, the first main channel 3331 is arc-shaped, with the center of the arc coinciding with the axis of the first collecting portion 332. This increases the span of the first collecting portion 332 and facilitates exhaust from the electrode body. The first auxiliary channel 3332 is located between the first main channel 3331 and the first adapter portion 331, thereby increasing the exhaust path and further facilitating exhaust from the electrode body.

[0086] Please refer to Figure 4 and Figure 8 , Figure 8 This is a schematic structural diagram of the second adapter provided in some embodiments of the present application.

[0087] In some embodiments of the present application, the adapter assembly 3 also includes a second adapter 34. Along the first direction Z, the second adapter 34 is located between the explosion-proof valve 22 and the electrode body, and is respectively connected to the shell and the electrode ear; the second adapter 34 is spaced apart from the first adapter 33; a second channel 343 is provided on the second adapter 34, and the second channel 343 passes through the second adapter 34 along the first direction Z.

[0088] The second adapter 34 is spaced apart from the first adapter 33, and may be in the order of the cover plate 23, the first adapter 33, the second adapter 34, and the electrode assembly in the first direction Z, or in the order of the cover plate 23, the second adapter 34, the first adapter 33, and the electrode assembly in the first direction Z, or the first adapter 33 and the second adapter 34 may be spaced apart on a plane perpendicular to the first direction Z.

[0089] The first adapter 33 is connected to the housing and the tab, respectively. The second adapter 34 is connected to the housing and the tab, respectively. When connected, if the first adapter 33 is connected to the positive tab, the second adapter 34 is connected to the negative tab; if the first adapter 33 is connected to the negative tab, the second adapter 34 is connected to the positive tab. If the first adapter 33 is connected to the electrode terminal 21, the second adapter 34 is connected to the cover plate 23; if the first adapter 33 is connected to the cover plate 23, the second adapter 34 is connected to the electrode terminal 21.

[0090] In the technical solution of the above embodiment, the adapter assembly 3 includes a first adapter 33 and a second adapter 34. Both first and second adapters 33 and 34 are located on the same side of the electrode body. Accordingly, the positive and negative electrode tabs are connected to the same end of the electrode body, which can reduce the space occupied by the tabs and thus improve the energy density of the battery cell. In addition, the second adapter 34 is provided with a second channel 343 to facilitate exhaust from the electrode body.

[0091] In some embodiments of the present application, Figure 8 As shown, the second adapter 34 includes a second collecting part 342 and a second adapter part 341. The second collecting part 342 is connected to the pole ear. The second channel 343 is located on the second collecting part 342. The second channel 343 includes a second main channel 3431 and a second auxiliary channel 3432. Along the center to the outer edge of the second collecting part 342, there are the second auxiliary channel 3432 and the second main channel 3431 in sequence. The area of ​​the second main channel 3431 is larger than that of the second auxiliary channel 3432. Along the first direction Z, the second adapter part 341 is located between the second collecting part 342 and the explosion-proof valve 22, and is respectively connected to the second collecting part 342 and the shell.

[0092] The second current collecting part 342 and the second adapter part 341 can be integrally formed or separately formed and then connected. The second current collecting part serves as a conductor. In the first direction Z, the second adapter part 341 is located between the second current collecting part 342 and the explosion-proof valve 22. The second adapter part 341 contacts the housing (electrode terminal 21 or cover plate 23), while the second current collecting part 342 does not contact the housing. The second current collecting part 342 is connected to the electrode tab, and the second adapter part 341 is connected to the housing. The second current collecting part 342 can collect the current from the electrode tab and transfer it to the housing through the second adapter part 341.

[0093] In the technical solution of the above embodiment, a second channel 343 is provided on the second flow collecting portion 342, which collects current without hindering the exhaust of the electrode assembly. The second channel 343 comprises a second main channel 3431 and a second auxiliary channel 3432. This dual-channel design not only increases the flow path for the medium but also provides a dual safety mechanism for facilitating the exhaust of the electrode assembly. The area of ​​the second main channel 3431 is larger than that of the second auxiliary channel 3432, which improves the flow of the medium.

[0094] In some embodiments of the present application, Figure 8 As shown, the second collecting part 342 is fan-shaped, and an avoidance groove is provided at the central angle of the fan, and the avoidance groove is used to avoid the first adapter 33; the second adapter part 341 is connected to the arc edge of the second collecting part 342, and the second adapter part 341 is circular, and the axis coincides with the axis of the second collecting part 342.

[0095] The central angle of the sector is provided with an avoidance groove to avoid the first adapter portion 331 of the first current collecting member. The second adapter portion 341 is integrally formed with the second current collecting portion 342. The second adapter portion 341 is connected to the arc edge of the second current collecting portion 342. The second current collecting portion 342 collects the current and transfers it to the second adapter portion 341.

[0096] In the technical solution of the above embodiment, the second current collecting portion 342 is fan-shaped to facilitate current collection. The second adapter portion 341 is annular, coaxially arranged with the second current collecting portion 342, and connected to the arc edge of the second current collecting portion 342. Therefore, the portion of the second adapter portion 341 not connected to the second current collecting portion 342 has a small cross-section. This allows the second adapter 34 to safely transmit current when the current is normal, and to melt due to Joule heating when the current is abnormal (suddenly increased), reducing risks.

[0097] In some embodiments of the present application, Figure 8 As shown, the second main channel 3431 is arc-shaped, and the center of the arc coincides with the axis of the second collecting portion 342; the second auxiliary channel 3432 is rectangular, circular, triangular, trapezoidal, diamond-shaped or any one or a combination thereof.

[0098] Along the radial direction of the second collecting section 342, from the center to the outer edge, there are, in order, the second auxiliary channel 3432 and the second main channel 3431. There can be one or more second auxiliary channels 3432. When there is one second auxiliary channel 3432, its shape can be any one of a rectangle, a circle, a triangle, a trapezoid, and a diamond; when there are multiple second auxiliary channels 3432, their shape can be any combination of the above shapes. There can be one second main channel 3431, the arc center of the second main channel 3431 coincides with the axis of the second collecting section 342, and the central angle of the second main channel 3431 is smaller than the central angle of the second collecting section 342.

[0099] In the technical solution of the above embodiment, the second main channel 3431 is arc-shaped, with the center of the arc coinciding with the axis of the second manifold 342. This increases the span of the second manifold 342 and facilitates exhaust of the electrode body. The second auxiliary channel 3432 is located between the avoidance groove and the first main channel 3331, providing an additional exhaust path between the second main channel 3431 and the avoidance groove, further facilitating exhaust of the electrode body.

[0100] Please refer to Figure 4 and Figure 5 , Figure 5 A schematic structural diagram of the first insulating member provided in some embodiments of the present application.

[0101] In some embodiments of the present application, the adapter assembly 3 also includes a first insulating part 31, the first insulating part 31 includes a mounting portion 311, the mounting portion 311 is respectively connected to the first collecting portion 332 and the second collecting portion 342, isolating the first adapter 33 and the second adapter 34; a third channel 313 is provided on the mounting portion 311, and the third channel 313 passes through the mounting portion 311 along the first direction Z.

[0102] When the mounting portion 311 isolates the first adapter 33 and the second adapter 34, it may be the first collecting portion 332, the mounting portion 311, the second collecting portion 342, and the electrode body in sequence along the first direction Z; it may be the second collecting portion 342, the mounting portion 311, the first collecting portion 332, and the electrode body in sequence along the first direction Z; or it may be that on a plane perpendicular to the first direction Z, the mounting portion 311 is located between the first collecting portion 332 and the second collecting portion 342.

[0103] In the technical solution of the above embodiment, the adapter assembly 3 is provided with a first insulating member 31, which provides a mounting location for the first adapter 33 and the second adapter 34. The first insulating member 31 physically isolates the first adapter 33 from the second adapter 34, thereby improving reliability. The third channel 313 extends through the mounting portion 311 along the first direction Z, enabling medium flow between the area where the electrode body is located and the area where the explosion-proof valve 22 is located, thereby facilitating the exhaust of the electrode body to reach the explosion-proof valve 22.

[0104] In some embodiments of the present application, Figure 5 As shown, there are multiple third channels 313, and in the second direction Y, the multiple third channels 313 are symmetrically arranged, and the second direction Y is perpendicular to the first direction Z; the third channel 313 includes a third main channel 3131 and a third auxiliary channel 3132, and along the center to the outer edge of the mounting portion 311, there are the third auxiliary channel 3132 and the third main channel 3131 in sequence, and the area of ​​the third main channel 3131 is larger than the area of ​​the third auxiliary channel 3132.

[0105] For example, there may be two third channels 313, which are symmetrical in the second direction Y. That is, within the plane where the mounting portion 311 is located, the two third channels 313 may overlap when folded in half perpendicular to the second direction Y. Each third channel 313 includes a third main channel 3131 and a third auxiliary channel 3132. The number of third main channels 3131 may be one or more, and the number of third auxiliary channels 3132 may be one or more.

[0106] In the technical solution of the above embodiment, multiple third channels 313 are symmetrically arranged to improve medium circulation and facilitate exhaust from various locations on the end face of the electrode body (the end face of the electrode body facing the third channels 313). The third main channel 3131, serving as the primary exhaust path, has an area larger than that of the third auxiliary channel 3132, further improving exhaust efficiency.

[0107] In some embodiments of the present application, Figure 5 As shown, the third main channel 3131 is arc-shaped, and the center of the arc coincides with the axis of the mounting portion 311; the third auxiliary channel 3132 is rectangular, circular, triangular, trapezoidal, diamond-shaped or any one of their combinations.

[0108] In each third channel 313 , there may be one third main channel 3131 and multiple third auxiliary channels 3132 . The shapes of the multiple third auxiliary channels 3132 may be rectangular, circular, triangular, trapezoidal, or diamond, or any combination thereof.

[0109] In the technical solution of the above embodiment, the third main channel 3131 is arc-shaped, which can increase the span on the mounting portion 311 and facilitate exhaust of the electrode body. The third auxiliary channel 3132, as a supplement to the third main channel 3131, can further facilitate exhaust of the electrode body.

[0110] In some embodiments of the present application, Figure 4 、 Figure 5 、 Figure 7 and Figure 8 As shown, along the third direction X, the mounting portion 311 is located between the first collecting portion 332 and the second collecting portion 342 , and the third direction X, the second direction Y and the first direction Z are all perpendicular to each other.

[0111] The first collecting section 332, the second collecting section 342, and the mounting section 311 are located on the same plane, perpendicular to the first direction Z. The first collecting section 332 and the second collecting section 342 are fan-shaped, and the mounting section 311 is connected between the first collecting section 332 and the second collecting section 342. The mounting section 311, the first collecting section 332, and the second collecting section 342 form a circular plate that blocks the electrode body from the cover plate 23. The first channel 333, the second channel 343, and the third channel 313 each allow exhaust gas from the electrode body to pass through.

[0112] In the technical solution of the above embodiment, along the third direction X, the mounting portion 311 is located between the first current collecting portion 332 and the second current collecting portion 342, and the first current collecting portion 332, the second current collecting portion 342, and the mounting portion 311 are on the same plane, which can reduce the space occupied by the adapter assembly 3 in the first direction Z, thereby improving the energy density of the battery cell.

[0113] In some embodiments of the present application, Figure 5 、 Figure 7 and Figure 8 As shown, the first collecting part 332 and the second collecting part 342 are both provided with overlapping edges 334; along the first direction Z, the overlapping edge 334 is located between the explosion-proof valve 22 and the mounting part 311, and is in contact with the mounting part 311; the mounting part 311 is provided with a plug-in protrusion 3111, and the overlapping edge 334 is provided with a plug-in hole 3341, and the plug-in protrusion 3111 is plug-connected with the plug-in hole 3341.

[0114] Mounting portion 311 is provided with a plug-in protrusion 3111, which can be cylindrical, rectangular, conical, or wedge-shaped. Insertion hole 3341 matches plug-in protrusion 3111. Overlapping edge 334 overlaps mounting portion 311, while plug-in protrusion 3111 is inserted into insertion hole 3341, plugging into insertion hole 3341. When plugging protrusion 3111 and insertion hole 3341 are plugged together, they can achieve a clearance fit, a transition fit, or an interference fit.

[0115] In the technical solution of the above embodiment, the first collecting part 332 and the second collecting part 342 are both overlapped and connected with the mounting part 311 through the overlapping edge 334, so that the mounting part 311 can provide the first collecting part 332 and the second collecting part 342 with a limit in the first direction Z; the first collecting part 332 and the second collecting part 342 are both plug-connected with the mounting part 311, so that the mounting part 311 can provide the first collecting part 332 and the second collecting part 342 with a limit in the second direction Y and the third direction X, thereby fixing the relative positions of the first collecting part and the second collecting part, thereby improving the reliability of the connection.

[0116] In some embodiments of the present application, Figure 5 and Figure 8 As shown, the first insulating member 31 also includes a support portion 312, which is annular and connected to the outer peripheral surface of the mounting portion 311; along the first direction Z, the second adapter portion 341 is located between the explosion-proof valve 22 and the support portion 312, and the support portion 312 is in contact with the second adapter portion 341.

[0117] The mounting portion 311 and support portion 312 are integrally formed. The outer circumference of the mounting portion 311 is connected to the annular support portion 312, forming a first mounting groove and a second mounting groove. The first adapter 33 is mounted within the first mounting groove, the second manifold 342 of the second adapter 34 is located within the second mounting groove, and the second adapter portion 341 of the second adapter 34 is in contact with the support portion 312.

[0118] In the technical solution of the above embodiment, the support portion 312 is connected to the outer circumference of the mounting portion 311, which can improve the structural strength of the first insulating member 31. In addition, the support portion 312 is in contact with the second adapter portion 341, providing support for the second adapter portion 341, thereby improving the connection strength between the second adapter portion 341 and the housing.

[0119] Please refer to Figure 4 and Figure 6 , Figure 6 This is a schematic structural diagram of the second insulating member provided in some embodiments of the present application.

[0120] In some embodiments of the present application, the adapter assembly 3 also includes a second insulating member 32, which is located between the explosion-proof valve 22 and the overlapping edge 334 along the first direction Z; the second insulating member 32 is annular, with an avoidance hole 322 provided in the center, and the first adapter portion 331 is inserted into the avoidance hole 322; a fourth channel 321 is provided on the second insulating member 32, and the fourth channel 321 passes through the second insulating member 32 along the first direction Z.

[0121] In the first direction Z, the second insulating member 32 is located between the explosion-proof valve 22 and the overlapping edge 334, and the second insulating member 32 is in contact with the overlapping edge 334. A clearance hole 322 is provided in the center of the second insulating member 32. The first adapter 331 passes through the clearance hole 322 and can be connected to the housing (electrode terminal 21 or cover plate 23). The second adapter 341 is located outside the circumference of the second insulating member 32.

[0122] In the technical solution of the above embodiment, the second insulating member 32 is located between the explosion-proof valve 22 and the overlapping edge 334 in the first direction Z, and can press the first adapter 33 and the second adapter 34 against the first insulating member 31 to prevent the overlapping edge 334 from falling off the mounting portion 311. The fourth channel 321 penetrates the second insulating member 32 along the first direction Z. Thus, the medium in the area where the explosion-proof valve 22 is located and the area where the electrode assembly is located can flow through the fourth channel 321, facilitating the flow of exhaust gas from the electrode body into the area where the explosion-proof valve 22 is located.

[0123] In some embodiments of the present application, Figure 6 As shown, the fourth channel 321 is arc-shaped, and the center of the arc coincides with the axis of the second insulating member 32; there are multiple fourth channels 321, and they are distributed in a circular array around the axis of the second insulating member 32; along the first direction Z, the projection of the fourth channel 321 at least partially overlaps with the projection of the first channel 333, the projection of the second channel 343, and the projection of the third channel 313.

[0124] In the first direction Z, the first channel 333, the second channel 343, and the third channel 313 are located on the same plane, and the fourth channel 321 is located between the plane and the explosion-proof valve 22. Exhaust gas from the electrode body can pass through the first channel 333 and / or the second channel 343 and / or the third channel 313, and then enter the area where the explosion-proof valve 22 is located through the fourth channel 321. When projected along the first direction Z, the projections of the multiple fourth channels 321 can overlap with the projection of the first main channel 3331, or the projection of the fourth channel 321 can cover the projection of the first main channel 3331; can overlap with the projection of the second main channel 3431, or the projection of the fourth channel 321 can cover the projection of the second main channel 3431; and can overlap with the projection of the third main channel 3131, or the projection of the fourth channel 321 can cover the projection of the third main channel 3131.

[0125] In the technical solution of the above embodiment, multiple fourth channels 321 are distributed in a circular array around the axis of the second insulating member 32, facilitating exhaust from various locations on the end surface of the electrode body. In the first direction Z, the projection of the fourth channels 321 at least partially overlaps with the projections of the first channel 333, the second channel 343, and the third channel 313. Consequently, the fourth channels 321 can directly communicate with the first channel 333, the second channel 343, and the third channel 313, reducing medium flow resistance and facilitating exhaust from the electrode body.

[0126] In some embodiments of the present application, Figure 3 As shown, the shell is cylindrical; the tabs include a positive tab and a negative tab. Along the first direction Z, the positive tab and the negative tab are both located between the explosion-proof valve 22 and the electrode body; the positive tab is fan-shaped and connected to the first adapter 33; the negative tab is fan-shaped and connected to the second adapter 34.

[0127] The housing is cylindrical, with a cover plate 23 at one end. The electrode body is also cylindrical, with both the positive and negative electrode tabs extending toward one end of the cover plate 23. The positive electrode tab is fan-shaped, fitting over and welded to the first current collector 332; the negative electrode tab is fan-shaped, fitting over and welded to the second current collector 342. The first adapter 33 is made of aluminum, with the first adapter 331 connected to the electrode terminal 21, which serves as the positive electrode. The second adapter 34 is made of copper, with the second adapter 341 connected to the cover plate 23, which serves as the negative electrode.

[0128] In the technical solution of the above embodiment, the battery cell is a cylindrical battery with positive and negative electrodes on the same side, the electrode terminal 21 is the positive electrode, and the cover plate 23 is the negative electrode. The gas generated by the electrode body can enter the area where the explosion-proof valve 22 is located through the adapter component 3, making it easier to open the explosion-proof valve 22.

[0129] In a second aspect, some embodiments of the present application provide a battery comprising the battery cell of any of the above embodiments.

[0130] The battery provided in the embodiment of the present application has all the beneficial effects of the battery cell in any of the embodiments of the first aspect described above. For details, please refer to the specific description of the battery cell in the above embodiments, which will not be repeated in this embodiment.

[0131] In a third aspect, some embodiments of the present application provide an electrical device, which includes a battery according to any of the above embodiments, and the battery is used for supplying power.

[0132] The electrical device provided in the embodiment of the present application has all the beneficial effects of the battery cell in any embodiment of the first aspect described above. For details, please refer to the specific description of the battery cell in the above embodiments, and this embodiment will not be repeated here.

[0133] The present embodiment provides a battery cell, which includes a housing 2, an electrode assembly, and an adapter assembly 3. The housing 2 includes a shell and an explosion-proof valve 22 mounted on the shell. The electrode assembly includes an electrode body and a tab. The adapter assembly 3 includes a first adapter 33. Along a first direction Z, the first adapter 33 is located between the explosion-proof valve 22 and the electrode body. A first channel 333 runs through the first adapter 33, and the first adapter 33 does not obstruct exhaust from the electrode body. Gas generated by the electrode body can flow to the area where the explosion-proof valve 22 is located through the first channel 333, thereby reducing gas accumulation in the area where the electrode body is located, suppressing shell expansion, facilitating the opening of the explosion-proof valve 22, and improving safety.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell, characterized in that: include: An outer shell, comprising a shell and an explosion-proof valve, wherein the explosion-proof valve is mounted on the shell; An electrode assembly is installed in the housing, and the electrode assembly includes an electrode body and an electrode tab; An adapter assembly is installed in the shell, and the adapter assembly includes a first adapter. Along the first direction, the first adapter is located between the explosion-proof valve and the electrode body, and is respectively connected to the shell and the electrode ear. The first adapter is provided with a first channel, and the first channel passes through the first adapter along the first direction.

2. The battery cell according to claim 1, wherein: The first adapter comprises: a first current collecting portion connected to the tab, the first current collecting portion being provided with the first channel, the first channel comprising a first main channel and a first auxiliary channel, the first auxiliary channel and the first main channel being arranged from the center to the outer edge of the first current collecting portion, the area of ​​the first main channel being larger than the area of ​​the first auxiliary channel; The first adapter portion is connected to the first collecting portion and the shell respectively.

3. The battery cell according to claim 2, characterized in that: The first collecting portion is fan-shaped and connected to the first connecting portion at the central angle of the fan-shaped portion; The first adapter portion is disc-shaped and is located between the first collecting portion and the explosion-proof valve in the first direction.

4. The battery cell according to claim 3, characterized in that The first main channel is arc-shaped, and the center of the arc coincides with the axis of the first collecting portion; The first auxiliary channel is in any one of rectangular, circular, triangular, trapezoidal, and diamond shapes, or a combination thereof.

5. The battery cell according to claim 2, characterized in that: The adapter assembly further includes: a second adapter, located between the explosion-proof valve and the electrode body along the first direction, and connected to the housing and the electrode tab respectively; The second adapter is spaced apart from the first adapter; The second adapter is provided with a second channel, and the second channel passes through the second adapter along the first direction.

6. The battery cell according to claim 5, characterized in that The second adapter comprises: a second current collecting portion connected to the tab, the second channel being located on the second current collecting portion, the second channel comprising a second main channel and a second auxiliary channel, the second auxiliary channel and the second main channel being arranged in order from the center to the outer edge of the second current collecting portion, the area of ​​the second main channel being larger than that of the second auxiliary channel; The second adapter portion is located along the first direction between the second flow collecting portion and the explosion-proof valve, and is connected to the second flow collecting portion and the shell respectively.

7. The battery cell according to claim 6, characterized in that The second collecting portion is fan-shaped, and a avoidance groove is provided at the central angle of the fan-shaped portion, and the avoidance groove is used to avoid the first adapter; The second transition portion is connected to the arc edge of the second current collecting portion. The second transition portion is in a circular ring shape, and the axis thereof coincides with the axis of the second current collecting portion.

8. The battery cell according to claim 7, characterized in that The second main channel is arc-shaped, and the center of the arc coincides with the axis of the second collecting portion; The second auxiliary channel is in any one of rectangular, circular, triangular, trapezoidal, and diamond shapes, or a combination thereof.

9. The battery cell according to claim 7, characterized in that: The adapter assembly further includes: a first insulating member, comprising a mounting portion, wherein the mounting portion is connected to the first current collecting portion and the second current collecting portion, respectively, and is used to isolate the first adapter from the second adapter; The mounting portion is provided with a third channel, and the third channel passes through the mounting portion along the first direction.

10. The battery cell according to claim 9, characterized in that There are multiple third channels, and the multiple third channels are symmetrically arranged in the second direction, and the second direction is perpendicular to the first direction; The third channel includes a third main channel and a third auxiliary channel, and along the center to the outer edge of the mounting portion, there are the third auxiliary channel and the third main channel in sequence, and the area of ​​the third main channel is larger than the area of ​​the third auxiliary channel; The third main channel is arc-shaped, and the center of the arc coincides with the axis of the mounting portion; The third auxiliary channel is in any one of rectangular, circular, triangular, trapezoidal, and diamond shapes, or a combination thereof.

11. The battery cell according to claim 10, characterized in that Along the third direction, the mounting portion is located between the first collecting portion and the second collecting portion, and the third direction, the second direction and the first direction are all perpendicular to each other.

12. The battery cell according to claim 11, characterized in that The first insulating member further comprises: a supporting portion, the supporting portion being annular and connected to the outer peripheral surface of the mounting portion; Along the first direction, the second adapter portion is located between the explosion-proof valve and the supporting portion, and the supporting portion is in contact with the second adapter portion.

13. The battery cell according to claim 11, characterized in that The first current collecting portion and the second current collecting portion are both provided with overlapping edges; Along the first direction, the overlapping edge is located between the explosion-proof valve and the mounting portion, and is in contact with the mounting portion; The mounting portion is provided with an inserting protrusion, the overlapping edge is provided with an inserting hole, and the inserting protrusion is plug-connected with the inserting hole.

14. The battery cell according to claim 13, characterized in that The adapter assembly further includes: a second insulating member, located between the explosion-proof valve and the overlapping edge along the first direction; The second insulating member is annular and has a avoidance hole at the center, and the first adapter portion is inserted into the avoidance hole; A fourth channel is provided on the second insulating member, and the fourth channel passes through the second insulating member along the first direction.

15. The battery cell according to claim 14, characterized in that The fourth channel is arc-shaped, and the center of the arc coincides with the axis of the second insulating member; There are a plurality of fourth channels, and the fourth channels are distributed in a circular array around the axis of the second insulating member; Along the first direction, the projection of the fourth channel at least partially overlaps with the projection of the first channel, the projection of the second channel, and the projection of the third channel.

16. The battery cell according to claim 5, characterized in that The shell is cylindrical; The electrode tabs include a positive electrode tab and a negative electrode tab, and along the first direction, the positive electrode tab and the negative electrode tab are both located between the explosion-proof valve and the electrode body; The positive electrode tab is fan-shaped and connected to the first adapter; The negative electrode tab is fan-shaped and connected to the second adapter.

17. A battery, characterized in that: The battery cell comprises the battery cell according to any one of claims 1 to 16.

18. An electrical device, characterized in that: The battery of claim 17 is included for supplying power.

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