Battery cell, battery device and electric device

Abstract

The utility model discloses a battery monomer, a battery device and a power utilization device, the battery monomer comprises a shell and an electrode assembly, the electrode assembly is accommodated in the shell, the electrode assembly comprises a plurality of pole pieces, each pole piece comprises a pole piece main body and a pole lug, and the root of the pole lug is connected to the pole piece main body; at least one tab comprises a first reinforcing rib and a second reinforcing rib, the first reinforcing rib and the second reinforcing rib are strip-shaped, an included angle between the length direction of the first reinforcing rib and the length direction of the second reinforcing rib is an acute angle, and one end, close to the root part, of the first reinforcing rib is connected with one end, close to the root part, of the second reinforcing rib. According to the battery monomer disclosed by the invention, the tabs can have relatively good structural strength, the stable and good contact area of the tabs and the connection points of the internal electrodes or the external circuits of the battery monomer can be ensured, and the resistance is kept at a relatively low level, so that current can smoothly pass through the tabs, and the charging and discharging efficiency of the battery monomer is improved.

Description

Technical Field

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

[0002] Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important part of the sustainable development of the automotive industry. For electric vehicles, battery technology is a crucial factor in their development. As the core component of a battery, the performance and stability of the battery cell play a decisive role in the overall quality of the battery. The tabs, as the key structure connecting the positive and negative electrodes to the external circuitry within the battery cell, are usually made of metal and possess good conductivity. However, the material properties of the tabs make them relatively soft. During battery cell production, assembly, and subsequent use, the battery cell is susceptible to various external forces. If the tabs are wrinkled or bent, poor contact may occur between the tabs and the internal electrodes or external circuitry of the battery cell, leading to increased resistance. This will affect the charging and discharging performance of the battery cell and even its lifespan. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide a battery cell that enables the tabs to have good structural strength, ensuring a stable and good contact area between the tabs and the connection points of the battery cell's internal electrodes or external circuits, maintaining a low resistance level, and allowing current to flow smoothly through the tabs, thereby improving the charging and discharging efficiency of the battery cell.

[0004] This application also proposes a battery device.

[0005] This application also proposes an electrical device.

[0006] A battery cell according to a first aspect of this application includes: a housing; an electrode assembly housed within the housing, the electrode assembly including a plurality of electrode plates, each electrode plate including an electrode plate body and an electrode tab, the root of the electrode tab being connected to the electrode plate body; at least one electrode tab including a first reinforcing rib and a second reinforcing rib, both the first reinforcing rib and the second reinforcing rib being strip-shaped, the angle between the length direction of the first reinforcing rib and the length direction of the second reinforcing rib being an acute angle, and the end of the first reinforcing rib near the root and the end of the second reinforcing rib near the root being connected.

[0007] In the above example, by extending the first and second reinforcing ribs in two different directions, the external force can be dispersed in different directions, preventing the force from concentrating at a single point or in a single direction on the tab, thereby reducing the local stress on the tab. Furthermore, when a reinforcing rib in one direction tends to deform under pressure, the reinforcing rib in the other direction can act as a restraint, thus helping to maintain the overall shape and structural integrity of the tab. This ensures that the tab has good structural strength when subjected to external forces during battery cell production, assembly, and subsequent use. The tab is less prone to wrinkling or bending, ensuring a stable and good contact area between the tab and the internal electrodes or external circuitry of the battery cell, maintaining a low resistance level, and allowing current to flow smoothly through the tab, thereby improving the charging and discharging efficiency of the battery cell.

[0008] In some embodiments of this application, the end of the electrode tab away from the root is the head of the electrode tab, and the opening of the angle formed between the first reinforcing rib and the second reinforcing rib faces the head.

[0009] In the example above, the angled opening formed between the first and second reinforcing ribs faces the head, dispersing external forces along the ribs and preventing stress concentration at the head, effectively preventing wrinkles and breakage. Furthermore, this design increases the structural strength of the tab, enabling it to withstand larger currents, reducing resistance, and improving charging and discharging efficiency. Simultaneously, the robust head structure helps maintain the stability of the connection between the tab and the external circuitry, ensuring the battery functions normally under complex operating conditions and extending battery life.

[0010] In some embodiments of this application, the included angle α between the length direction of the first reinforcing rib and the length direction of the second reinforcing rib satisfies: 30°≤a≤45°.

[0011] In the above examples, by meeting the aforementioned conditions, stress concentration can be effectively avoided, and the tensile and compressive strength of the electrode tabs can be significantly improved. Furthermore, different angles can adapt to complex and varied working environments, making the electrode tabs less prone to wrinkling and bending, and exhibiting good stability.

[0012] In some embodiments of this application, multiple first reinforcing ribs and multiple second reinforcing ribs are provided, and the multiple first reinforcing ribs and multiple second reinforcing ribs are arranged alternately. The end of the second reinforcing rib near the root is connected to the end of one first reinforcing rib near the root, and the end of the second reinforcing rib away from the root is connected to the end of another first reinforcing rib away from the root.

[0013] In the above example, multiple first and second reinforcing ribs are provided, and the multiple first and second reinforcing ribs are arranged in an alternating manner. This allows each tab to effectively disperse forces from all directions and improve the structural strength of the tab. This enhances the overall rigidity of the tab, enabling it to maintain a stable shape in complex working environments and reducing structural changes caused by vibration, impact, and other factors. It also ensures that the contact area between the tab and the connection point of the battery cell's internal electrodes or external circuits is stable and good, and the resistance is kept at a low level, allowing current to flow smoothly through the tab, thereby improving the charging and discharging efficiency of the battery cell.

[0014] In some embodiments of this application, the ends of the first reinforcing rib near the root and the ends of the second reinforcing rib near the root both extend to the root.

[0015] In the above example, by extending both the end of the first reinforcing rib near the root and the end of the second reinforcing rib near the root to the root, when the current flows from the electrode body towards the electrode tab, the first and second reinforcing ribs can increase the current flow area, thereby reducing the resistance of the current on the electrode tab, reducing the resistance loss of the battery cell during charging and discharging, and improving the energy efficiency of the battery cell.

[0016] In some embodiments of this application, the end of the tab away from the root is the head, the end of the first reinforcing rib near the head extends to the head, and / or, the end of the second reinforcing rib near the head extends to the head.

[0017] In the above example, by extending the first or second reinforcing rib to the head, external forces can be dispersed along the first and second reinforcing ribs, avoiding stress concentration at the head and effectively preventing wrinkles and breakage. Furthermore, this design increases the structural strength of the tab, enabling it to withstand larger currents and reducing resistance, thereby improving the charging and discharging efficiency of the battery cell. Simultaneously, the robust head structure helps maintain the stability of the connection between the tab and the external circuitry, ensuring the battery cell can operate normally under complex conditions and extending its lifespan.

[0018] In some embodiments of this application, the end of the electrode tab away from the root is the head, and the electrode tab includes a plurality of reinforcing ribs arranged sequentially along the direction from the root to the head, each of the reinforcing ribs including a first reinforcing rib and a second reinforcing rib.

[0019] In the example above, by setting multiple reinforcing ribs, the different positions of the tab can be adaptively reinforced according to actual needs, thereby effectively improving the overall structural strength of the tab, making the tab less prone to wrinkling and bending, enabling it to withstand greater current, reducing resistance, and thus improving the charging and discharging efficiency of the battery cell.

[0020] In some embodiments of this application, the connection between the first reinforcing rib and the second reinforcing rib is a pointed portion, wherein, in the direction from the root to the head, the pointed portion of one reinforcing rib is misaligned with the pointed portion of the other reinforcing rib.

[0021] In the example above, by staggering the two reinforcing ribs, the stress dispersion path can be effectively widened. When subjected to external force, the force is transmitted between the two reinforcing ribs, preventing stress concentration in a single area. This enhances the tensile and bending resistance of the tabs, effectively resisting complex external forces. Regarding structural stability, this staggered structure forms a mutually supporting system, enhancing the overall rigidity of the tabs. This allows them to maintain a stable shape under vibration and impact, reducing structural deformation. It ensures stable and good contact area at the connection points, keeping resistance at a low level, allowing current to flow smoothly through the tabs, thereby improving the charging and discharging efficiency of the battery cell.

[0022] In some embodiments of this application, the connection between the first reinforcing rib and the second reinforcing rib is a pointed portion, wherein, in the direction from the root to the head, the pointed portion of one reinforcing rib is opposite to the pointed portion of the other reinforcing rib.

[0023] In the above example, by arranging the first and second reinforcing ribs, the distance between two adjacent reinforcing ribs can be made more uniform, so that the reinforcing ribs can distribute the force more evenly, making the tabs less prone to wrinkling and deformation, ensuring that the contact area of ​​the connection point is stable and good, keeping the resistance at a low level, and allowing the current to pass through the tabs smoothly, thereby improving the charging and discharging efficiency of the battery cell.

[0024] In some embodiments of this application, among the plurality of reinforcing ribs, the reinforcing rib near the root extends to the root.

[0025] In the example above, by extending the reinforcing ribs near the root of the multiple reinforcing ribs to the root, the reinforcing ribs can increase the current flow area when the current flows from the electrode body to the electrode tab, thereby reducing the resistance of the current on the electrode tab, reducing the resistance loss of the battery cell during charging and discharging, and improving the energy efficiency of the battery cell.

[0026] In some embodiments of this application, among the plurality of reinforcing ribs, the reinforcing rib closest to the head extends to the head.

[0027] In the example above, by extending the reinforcing ribs to the head, external forces can be dispersed along the first and second reinforcing ribs, preventing stress concentration at the head and effectively preventing wrinkles and breakage. Furthermore, this design increases the structural strength of the tab, enabling it to withstand larger currents and reducing resistance, thereby improving the charging and discharging efficiency of the battery cell. Simultaneously, the robust head structure helps maintain the stability of the connection between the tab and the external circuitry, ensuring a stable and good contact area at the connection point, keeping resistance at a low level, and allowing current to flow smoothly through the tab, thus improving the charging and discharging efficiency of the battery cell.

[0028] In some embodiments of this application, the end of the electrode tab furthest from the root is the head. In the direction from the root to the head, the size of the electrode tab is H1, the size of the first reinforcing rib is H2, and the size of the second reinforcing rib is H3, satisfying: 1 / 10≤H2 / H1≤1, and / or, 1 / 10≤H3 / H1≤1.

[0029] In the above example, by satisfying the above conditions, the first reinforcing rib and the second reinforcing rib can better disperse the force on the tab, making the tab less prone to wrinkling and bending, ensuring a stable and good contact area at the connection point, keeping the resistance at a low level, and allowing the current to pass smoothly through the tab, thereby improving the charging and discharging efficiency of the battery cell.

[0030] In some embodiments of this application, the dimensions H1 of the electrode tab, H2 of the first reinforcing rib, and H3 of the second reinforcing rib satisfy: 2 / 3 ≤ H2 / H1 ≤ 1, and / or 2 / 3 ≤ H3 / H1 ≤ 1.

[0031] In the above example, by satisfying the above conditions, the first reinforcing rib and the second reinforcing rib can better disperse the force on the tab, making the tab less prone to wrinkling and bending, ensuring a stable and good contact area at the connection point, keeping the resistance at a low level, and allowing the current to pass smoothly through the tab, thereby improving the charging and discharging efficiency of the battery cell.

[0032] In some embodiments of this application, the first reinforcing rib and the second reinforcing rib are arranged on at least one side of the electrode tab.

[0033] In the above example, by arranging the first and second reinforcing ribs on the side of the electrode, the first and second reinforcing ribs can effectively enhance the structural strength of the electrode and better disperse the force on the electrode, making the electrode less prone to wrinkling and bending, ensuring a stable and good contact area at the connection point, keeping the resistance at a low level, and allowing the current to pass smoothly through the electrode, thereby improving the charging and discharging efficiency of the battery cell.

[0034] In some embodiments of this application, the first reinforcing rib and the second reinforcing rib are formed by stamping the tabs.

[0035] In the above example, by stamping the first and second reinforcing ribs on the tabs, production steps can be reduced, production efficiency can be improved, and production costs can be lowered. Furthermore, the first and second reinforcing ribs enhance the strength and toughness of the tabs. When subjected to external forces, the first and second reinforcing ribs can disperse stress, improving the tabs' tensile, bending, and torsional resistance. This ensures a stable and good contact area at the connection point, maintaining a low resistance level, allowing current to flow smoothly through the tabs, thereby improving the charging and discharging efficiency of the battery cell.

[0036] In some embodiments of this application, the electrode tab is a positive electrode tab, and the thickness D1 of the positive electrode tab satisfies: 10μm≤D1≤20μm, and / or, the electrode tab is a negative electrode tab, and the thickness D2 of the negative electrode tab satisfies: 3μm≤D2≤10μm.

[0037] In the above example, by designing the thickness of the tab, the structural strength of the tab can be improved, and the tensile, bending and torsional resistance of the tab can be enhanced. This ensures that the contact area of ​​the connection point is stable and good, the resistance is kept at a low level, and the current can pass through the tab smoothly, thereby improving the charging and discharging efficiency of the battery cell.

[0038] This application also proposes a battery device having the battery cells described in the above embodiments.

[0039] According to the battery device of the second aspect of this application, by providing the battery cells of the above embodiments, the tabs of the battery cells are not easily wrinkled or bent, ensuring a stable and good contact area at the connection point, maintaining a low resistance level, and allowing current to flow smoothly through the tabs, thereby improving the charging and discharging efficiency of the battery cells. Therefore, the battery device of this application can have better charging and discharging efficiency.

[0040] This application also proposes an electrical device.

[0041] According to an embodiment of the third aspect of this application, the power-consuming device may include a battery device for storing or providing electrical energy.

[0042] In the above example, by providing the battery device described above, the power-consuming device of this application can have high power consumption efficiency.

[0043] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0044] Figure 1 The electrical device provided in some embodiments of this application is a structural schematic diagram of a vehicle.

[0045] Figure 2 Exploded views of a single battery cell provided in some embodiments of this application.

[0046] Figure 3 A schematic diagram of the electrode tab and the reinforcing ribs disposed on the electrode tab provided in the first embodiment of this application.

[0047] Figure 4 A schematic diagram of the electrode tab and the reinforcing ribs disposed on the electrode tab provided in the second embodiment of this application.

[0048] Figure 5 A schematic diagram of the electrode tab and the reinforcing ribs disposed on the electrode tab provided in the third embodiment of this application.

[0049] Figure 6 This is a schematic diagram of the electrode tab and the reinforcing ribs disposed on the electrode tab, which are provided in the fourth embodiment of this application.

[0050] Figure 7 This is a schematic diagram of the electrode tab and the reinforcing rib provided on the electrode tab, which is provided in the fifth embodiment of this application.

[0051] Figure 8 This is a schematic diagram of the electrode tab and the reinforcing rib provided on the electrode tab, which is provided in the sixth embodiment of this application.

[0052] Figure 9 This is a schematic diagram of the electrode tab and the reinforcing ribs disposed on the electrode tab, provided in the seventh embodiment of this application.

[0053] Figure label:

[0054] 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor;

[0055] 10. Battery cell; 11. Casing; 12. Electrode assembly; 121. Tab; 122. Root; 123. Head;

[0056] 2. Reinforcing ribs; 21. First reinforcing rib; 22. Second reinforcing rib;

[0057] 31. Tip. Detailed Implementation

[0058] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0060] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0061] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0062] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0063] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0064] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0065] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0066] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include one or more battery cells, and when there are multiple battery cells, they are connected in series, parallel, or mixed connections via a busbar.

[0067] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0068] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0069] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0070] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0071] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0072] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0073] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0074] The technical solutions described in the embodiments of this application are applicable to various power devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0075] Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important part of the sustainable development of the automotive industry. For electric vehicles, battery technology is a crucial factor in their development. As the core component of a battery, the performance and stability of the battery cell play a decisive role in the overall quality of the battery. The tabs, as the key structure connecting the positive and negative electrodes to the external circuitry within the battery cell, are usually made of metal and possess good conductivity. However, the material properties of the tabs make them relatively soft. During battery cell production, assembly, and subsequent use, the battery cell is susceptible to various external forces. If the tabs are wrinkled or bent, poor contact may occur between the tabs and the internal electrodes or external circuitry of the battery cell, leading to increased resistance. This will affect the charging and discharging performance of the battery cell and even its lifespan.

[0076] Based on the above considerations, to prevent damage to the tabs, the applicant, after in-depth research, designed a battery cell comprising a casing and an electrode assembly. The tabs of the electrode assembly are provided with a first reinforcing rib and a second reinforcing rib. By having the first and second reinforcing ribs extend in two different directions, external forces can be dispersed in different directions, preventing force concentration at a single point or in a single direction on the tab, thereby reducing the local stress on the tab. Furthermore, when the reinforcing rib in one direction tends to deform under pressure, the reinforcing rib in the other direction can act as a restraint, thus helping to maintain the overall shape and structural integrity of the tab. This ensures that the tab has good structural strength when subjected to external forces during production, assembly, and subsequent use, preventing wrinkles and bends. It also ensures stable and good contact area between the tab and the internal electrodes or external circuits of the battery cell, maintaining a low resistance level, allowing current to flow smoothly through the tab, thereby improving the charging and discharging efficiency of the battery cell.

[0077] This application provides an electrical device that uses the battery cell of this application as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0078] For ease of explanation, the following embodiments use a vehicle 1000 as an example to describe in detail the structure of the electrical device, battery device 100 and battery cell 10 of this application.

[0079] Please refer to Figure 1 , Figure 1 This application provides a schematic diagram of the structure of an electrical device for a vehicle 1000, as shown in some embodiments. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle 1000 is equipped with a battery device 100, which can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power requirements of the vehicle 1000 during starting, navigation, and driving. In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 1000.

[0080] The battery cell 10 of the first aspect of this application is described below with reference to the figures.

[0081] Please refer to Figure 2 , Figure 2 An exploded view of a battery cell 10 provided in some embodiments of this application.

[0082] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the electrode tab 121 and the reinforcing ribs disposed on the electrode tab 121, provided in the first embodiment of this application.

[0083] In some embodiments of this application, such as Figures 2-3As shown, the battery cell 10 includes a housing 11 and an electrode assembly 12. The electrode assembly 12 is housed within the housing 11 and includes multiple electrode plates. Each electrode plate includes an electrode plate body and an electrode tab 121. The root 122 of the electrode tab 121 is connected to the electrode plate body. At least one electrode tab 121 includes a first reinforcing rib 21 and a second reinforcing rib 22. Both the first reinforcing rib 21 and the second reinforcing rib 22 are strip-shaped. The angle between the length direction of the first reinforcing rib 21 and the length direction of the second reinforcing rib 22 is an acute angle. The end of the first reinforcing rib 21 near the root 122 and the end of the second reinforcing rib 22 near the root 122 are connected.

[0084] For example, there may be one electrode assembly 12 or multiple electrode assemblies, and this application does not limit the number of electrode assemblies.

[0085] For example, at least one electrode tab 121 includes a first reinforcing rib 21 and a second reinforcing rib 22. That is, there are multiple electrode tabs 121, such as two or more. One electrode tab 121 may be provided with the first reinforcing rib 21 and the second reinforcing rib 22, or two or more electrode tabs 121 may all be provided with the first reinforcing rib 21 and the second reinforcing rib 22. Specifically, the electrode tab 121 may be a positive electrode tab 121, on which a reinforcing rib may be provided. The electrode tab 121 may also be a negative electrode tab 121, on which a reinforcing rib may be provided. Alternatively, a reinforcing rib may be provided only on the positive electrode tab 121, or only on the negative electrode tab 121.

[0086] For example, combined Figure 3 As shown, the first end of the first reinforcing rib 21 is connected to the first end of the second reinforcing rib 22, and the second ends of the first reinforcing rib 21 and the second reinforcing rib 22 are inclined in opposite directions. That is, the first reinforcing rib 21 and the second reinforcing rib 22 extend in two different directions. In other words, the first reinforcing rib 21 and the second reinforcing rib 22 form a "V"-shaped reinforcing rib. The "V"-shaped reinforcing rib can transmit force along both sides, significantly improving the bearing capacity of the local area. In addition, the "V"-shaped reinforcing rib has good structural stability and can effectively resist external forces.

[0087] Furthermore, when the tab 121 is subjected to force, the first reinforcing rib 21 and the second reinforcing rib 22 can disperse the external force in different directions. For example, when subjected to an oblique tensile force, the first reinforcing rib 21 can decompose part of the tensile force along its own extension direction, while the second reinforcing rib 22 can decompose another part of the force along its direction, so that the force is not concentrated at a certain point or in a certain direction on the tab 121, thereby reducing the local stress on the tab 121. Moreover, when the reinforcing rib in one direction is under pressure and tends to deform, the reinforcing rib in the other direction can play a restraining role, which helps to maintain the overall shape and structural integrity of the tab 121. This ensures that the tab 121 has good structural strength when subjected to external forces during the production, assembly, and subsequent use of the battery cell 10. The tab 121 is not easy to wrinkle or bend. If the tab 121 wrinkles or bends, it may cause poor contact between the tab 121 and the internal electrode or external circuit of the battery cell 10, resulting in increased resistance. The tab 121 is not easily wrinkled or bent, which ensures a stable and good contact area at the connection point and keeps the resistance at a low level, allowing the current to pass smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0088] In the above example, by having the first reinforcing rib 21 and the second reinforcing rib 22 extend in two different directions, the external force can be dispersed in different directions, preventing the force from concentrating at a single point or in a single direction on the tab 121, thereby reducing the local stress on the tab 121. Furthermore, when a reinforcing rib in one direction is subjected to pressure and tends to deform, the reinforcing rib in the other direction can act as a restraint, thus helping to maintain the overall shape and structural integrity of the tab 121. This ensures that the tab 121 has good structural strength when subjected to external forces during the production, assembly, and subsequent use of the battery cell 10. The tab 121 is less prone to wrinkling or bending, ensuring a stable and good contact area between the tab 121 and the connection points of the battery cell 10's internal electrodes or external circuits, maintaining a low resistance level, and allowing current to flow smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0089] In some embodiments of this application, such as Figure 3 As shown, the end of the tab 121 away from the root 122 is the head 123 of the tab 121, and the opening of the angle formed between the first reinforcing rib 21 and the second reinforcing rib 22 faces the head 123.

[0090] For example, the first reinforcing rib 21 and the second reinforcing rib 22 are of equal length and are symmetrical along a line of symmetry that extends from the head 123 to the root 122. More specifically, when the tab 121 is in a completely flat state, the side of the tab 121 that is connected to the electrode body is the first side, and the line of symmetry is perpendicular to the first side.

[0091] In the above example, the angled opening formed between the first reinforcing rib 21 and the second reinforcing rib 22 faces the head 123. This disperses external forces along the first and second reinforcing ribs 21 and 22, preventing stress concentration at the head 123 and effectively preventing wrinkles or breakage. Furthermore, this design increases the structural strength of the tab 121, enabling it to withstand larger currents, reducing resistance, and improving charging and discharging efficiency. Simultaneously, the robust head 123 structure helps maintain the stability of the connection between the tab 121 and the external circuitry, ensuring the battery functions normally under complex operating conditions and extending battery life.

[0092] In some embodiments of this application, such as Figure 3 As shown, the angle α between the length direction of the first reinforcing rib 21 and the length direction of the second reinforcing rib 22 satisfies: 0°<a<180°.

[0093] For example, the included angle α between the length direction of the first reinforcing rib 21 and the length direction of the second reinforcing rib 22 can be 15°, 30°, 45°, 60°, 75°, 90°, 105°, 120°, 135°, or 150°.

[0094] In the above example, by meeting the above conditions, stress concentration can be effectively avoided, and the tensile and compressive strength of tab 121121 can be significantly improved. Furthermore, different angles can adapt to complex and varied working environments, making tab 121121 less prone to wrinkling and bending, and exhibiting good stability.

[0095] In some embodiments of this application, such as Figure 3 As shown, the included angle α between the length direction of the first reinforcing rib 21 and the length direction of the second reinforcing rib 22 satisfies: 30°≤a≤45°.

[0096] For example, the included angle α between the length direction of the first reinforcing rib 21 and the length direction of the second reinforcing rib 22 can be 30°, 31°, 32°, 33°, 34°, 40°, 41°, 42°, 43°, or 44°.

[0097] In the above example, by meeting the above conditions, stress concentration can be effectively avoided, and the tensile and compressive strength of the tab 121 can be significantly improved. Furthermore, different angles can adapt to complex and varied working environments, making the tab 121 less prone to wrinkling and bending, and exhibiting good stability.

[0098] Please refer to Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the electrode tab 121 and the reinforcing ribs disposed on the electrode tab 121, provided in the second embodiment of this application. Figure 5 This is a schematic diagram of the electrode tab 121 and the reinforcing ribs disposed on the electrode tab 121, provided in the third embodiment of this application.

[0099] In some embodiments of this application, multiple first reinforcing ribs 21 and multiple second reinforcing ribs 22 are provided, and the multiple first reinforcing ribs 21 and multiple second reinforcing ribs 22 are arranged alternately. The end of the second reinforcing rib 22 near the root 122 is connected to the end of one first reinforcing rib 21 near the root 122, and the end of the second reinforcing rib 22 away from the root 122 is connected to the end of another first reinforcing rib 21 away from the root 122.

[0100] like Figure 3 As shown, there are two first reinforcing ribs 21 and two second reinforcing ribs 22. The two first reinforcing ribs 21 and the two second reinforcing ribs 22 are arranged alternately. The connection method of the first reinforcing rib 21 and the second reinforcing rib 22 located in the middle is as follows: the end of the second reinforcing rib 22 near the root 122 is connected to the end of one first reinforcing rib 21 near the root 122, and the end of the second reinforcing rib 22 away from the root 122 is connected to the end of the other first reinforcing rib 21 away from the root 122.

[0101] When the tab 121 is subjected to external force, the force is transmitted between the two first reinforcing ribs 21 and the two second reinforcing ribs 22, forming a multi-directional dispersion path. This greatly improves the tensile and compressive strength of the tab 121 and effectively reduces the probability of damage to the tab 121 due to uneven force distribution. Furthermore, referring to... Figure 3 As shown, the two first reinforcing ribs 21 and the two second reinforcing ribs 22 form a "W"-shaped reinforcing structure, which can further enhance the overall rigidity of the tab 121, so that it can maintain a stable shape in complex working environments, reduce structural changes caused by factors such as vibration and impact, and ensure that the contact area of ​​the tab 121 with the internal electrode or external circuit of the battery cell 10 is stable and good, and the resistance is kept at a low level, so that the current can pass through the tab 121 smoothly, thereby improving the charging and discharging efficiency of the battery cell 10.

[0102] like Figure 4As shown, there are four first reinforcing ribs 21 and four second reinforcing ribs 22. It is understood that the number of first reinforcing ribs 21 and second reinforcing ribs 22 can be set according to actual needs; for example, more than two are acceptable, and this application does not impose any restrictions. In this example, the "V"-shaped reinforcing structure constructed by the first reinforcing ribs 21 and second reinforcing ribs 22, two "V"-shaped reinforcing structures can construct a "W"-shaped reinforcing structure, and three or more "V"-shaped reinforcing structures can give the tab 121 better structural strength, thereby further enhancing the overall rigidity of the tab 121, maintaining its stable shape in complex working environments, reducing structural changes caused by vibration, impact, and other factors, ensuring stable and good contact area between the tab 121 and the internal electrodes or external circuits of the battery cell 10, keeping the resistance at a low level, allowing current to flow smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0103] For example, the included angle between the first reinforcing rib 21 and the second reinforcing rib 22 is α. The included angle α between each first reinforcing rib 21 and the second reinforcing rib 22 may be equal or unequal, and this application does not impose any limitation. It is understood that having different included angles α results in different force dispersion capabilities in the corresponding regions, thereby giving the corresponding tab 121 regions different structural strengths. The specific arrangement can be made according to actual needs, and this application does not impose any limitations.

[0104] In the above example, multiple first reinforcing ribs 21 and second reinforcing ribs 22 are provided, and the multiple first reinforcing ribs 21 and multiple second reinforcing ribs 22 are arranged in an alternating manner. This allows each tab 121 to effectively disperse the forces from all directions and improve the structural strength of the tab 121. This can better enhance the overall rigidity of the tab 121, enabling it to maintain a stable shape in complex working environments, reducing structural changes caused by factors such as vibration and impact. It can ensure that the contact area between the tab 121 and the connection point of the battery cell 10's internal electrodes or external circuits is stable and good, and the resistance is kept at a low level, allowing the current to pass smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0105] In some embodiments of this application, such as Figures 3-5 As shown, the end of the first reinforcing rib 21 near the root 122 and the end of the second reinforcing rib 22 near the root 122 both extend to the root 122.

[0106] In other words, the first reinforcing rib 21 near the root 122 and the second reinforcing rib 22 near the root 122 both extend to the root 122, which is equivalent to the first reinforcing rib 21 and the second reinforcing rib 22 being connected to the electrode body. When the current flows from the electrode body to the tab 121, the first reinforcing rib 21 and the second reinforcing rib 22 can increase the current flow area, thereby reducing the resistance of the current on the tab 121, reducing the resistance loss of the battery cell 10 during the charging and discharging process, and improving the energy efficiency of the battery cell 10.

[0107] In the above example, by making the end of the first reinforcing rib 21 near the root 122 and the end of the second reinforcing rib 22 near the root 122 both extend to the root 122, when the current flows from the electrode body to the tab 121, the first reinforcing rib 21 and the second reinforcing rib 22 can increase the current flow area, thereby reducing the resistance of the current on the tab 121, reducing the resistance loss of the battery cell 10 during the charging and discharging process, and improving the energy efficiency of the battery cell 10.

[0108] In some embodiments of this application, such as Figures 3-5 As shown, the end of the tab 121 away from the root 122 is the head 123, the first reinforcing rib 21 extends to the head 123 from the end near the head 123, and / or, the second reinforcing rib 22 extends to the head 123 from the end near the head 123.

[0109] For example, only the end of the first reinforcing rib 21 near the head 123 extends to the head 123.

[0110] For example, only the end of the second reinforcing rib 22 near the head 123 extends to the head 123.

[0111] For example, the first reinforcing rib 21 extends to the head 123 from one end near the head 123, while the second reinforcing rib 22 extends to the head 123 from one end near the head 123.

[0112] In the above example, by extending the first reinforcing rib 21 or the second reinforcing rib 22 to the head 123, external forces can be dispersed along the first reinforcing rib 21 and the second reinforcing rib 22, avoiding stress concentration at the head 123 and effectively preventing wrinkles or breakage of the head 123. Moreover, this design increases the structural strength of the tab 121, enabling it to withstand larger currents and reducing resistance, thereby improving the charging and discharging efficiency of the battery cell 10. Simultaneously, the robust head 123 structure helps maintain the stability of the connection between the tab 121 and the external circuitry, ensuring that the battery cell 10 can operate normally under complex conditions and extending its service life.

[0113] Please refer to Figures 6-9 , Figure 6 A schematic diagram of the electrode tab 121 and the reinforcing ribs disposed on the electrode tab 121, provided in the fourth embodiment of this application. Figure 7 A schematic diagram of the electrode tab 121 and the reinforcing ribs disposed on the electrode tab 121, provided in the fifth embodiment of this application. Figure 8 This is a schematic diagram of the electrode tab 121 and the reinforcing ribs disposed on the electrode tab 121, provided in the sixth embodiment of this application. Figure 9 A schematic diagram of the electrode tab 121 and the reinforcing ribs disposed on the electrode tab 121, provided in the seventh embodiment of this application.

[0114] In some embodiments of this application, the end of the tab 121 away from the root 122 is the head 123. The tab 121 includes a plurality of reinforcing ribs 2. The plurality of reinforcing ribs 2 are arranged sequentially along the direction from the root 122 to the head 123. Each reinforcing rib 2 includes a first reinforcing rib 21 and a second reinforcing rib 22.

[0115] For example, there may be two or more reinforcing ribs 2. Along the direction from the root 122 to the head 123, two adjacent reinforcing ribs 2 may be reinforcing ribs 2 with the same structure. For example, in two reinforcing ribs 2, the included angle between the first reinforcing rib 21 and the second reinforcing rib 22 is equal.

[0116] For example, there may be two or more reinforcing ribs 2. Along the direction from the root 122 to the head 123, two adjacent reinforcing ribs 2 may be reinforcing ribs 2 with different structures. For example, the included angle between the first reinforcing rib 21 and the second reinforcing rib 22 in the two reinforcing ribs 2 may be unequal.

[0117] Furthermore, it should be noted that this application includes not only the examples listed above, but also the angle between the first reinforcing rib 21 and the second reinforcing rib 22 can be set according to actual needs, and this application does not impose any restrictions.

[0118] For example, along the direction from the root 122 to the head 123, two adjacent reinforcing ribs 2 can be connected crosswise or spaced apart. The specific configuration can also be set according to actual needs, and this application does not impose any restrictions.

[0119] In the above example, by setting multiple reinforcing ribs 2, the tabs 121 can be adaptively reinforced at different positions according to actual needs, thereby effectively improving the overall structural strength of the tabs 121, making the tabs 121 less prone to wrinkling and bending, enabling them to withstand greater current, reducing resistance, and thus improving the charging and discharging efficiency of the battery cell 10.

[0120] In some embodiments of this application, such as Figure 6 and Figure 7As shown, the connection between the first reinforcing rib 21 and the second reinforcing rib 22 is a tip 31, wherein, in the direction from the root 122 to the head 123, the tip 31 of one reinforcing rib 2 is misaligned with the tip 31 of the other reinforcing rib 2.

[0121] For example, such as Figure 6 As shown, in the direction from the root 122 to the head 123, two reinforcing ribs 2 are spaced apart, and the tip 31 of one reinforcing rib 2 is misaligned with the tip 31 of the other reinforcing rib 2.

[0122] For example, such as Figure 7 As shown, in the direction from the root 122 to the head 123, two reinforcing ribs 2 are connected crosswise, and the tip 31 of one reinforcing rib 2 is misaligned with the tip 31 of the other reinforcing rib 2.

[0123] In the above example, by staggering the two reinforcing ribs 2, the stress dispersion path can be effectively widened. When subjected to external force, the force is transmitted between the two reinforcing ribs 2, avoiding stress concentration in a certain part, which can enhance the tensile and bending resistance of the tab 121 and effectively resist complex external forces. In terms of structural stability, this staggered structure forms a mutually supporting system, which enhances the overall rigidity of the tab 121, enabling it to maintain a stable shape when subjected to vibration and impact, reducing structural deformation, ensuring a stable and good contact area at the connection point, keeping the resistance at a low level, and allowing the current to flow smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0124] In some embodiments of this application, such as Figure 8 and Figure 9 As shown, the connection between the first reinforcing rib 21 and the second reinforcing rib 22 is a tip 31, wherein, in the direction from the root 122 to the head 123, the tip 31 of one reinforcing rib 2 is opposite to the tip 31 of the other reinforcing rib 2.

[0125] For example, such as Figure 8As shown, the two reinforcing ribs 2 are a first rib and a second rib. The tip 31 of the first rib near the head 123 of the tab 121 is opposite to the tip 31 of the second rib near the root 122 of the tab 121. Furthermore, the tip 31 of the first rib near the root 122 of the tab 121 is opposite to the tip 31 of the second rib near the head 123 of the tab 121. Further, the first rib is a reinforcing rib 2 near the head 123, and the second rib is a reinforcing rib 2 near the root 122. The tip 31 of the first rib near the root 122 of the tab 121 is connected to the tip 31 of the second rib near the head 123 of the tab 121. For this example, it should also be noted that this example is only for the purpose of description and is not a limitation of this application. In this example, the first rib is the reinforcing rib 2 near the head 123, and the second rib is the reinforcing rib 2 near the root 122. The tip 31 of the first rib near the root 122 of the tab 121 and the tip 31 of the second rib near the head 123 of the tab 121 can also be set separately. This application will not elaborate on other examples one by one.

[0126] For example, such as Figure 9 As shown, the two reinforcing ribs 2 are the first rib and the second rib. The tip 31 of the first rib near the head 123 of the tab 121 is opposite to the tip 31 of the second rib near the head 123 of the tab 121. Furthermore, the tip 31 of the first rib near the root 122 of the tab 121 is opposite to the tip 31 of the second rib near the root 122 of the tab 121.

[0127] In the above example, by arranging the first reinforcing rib 21 and the second reinforcing rib 22, the distance between two adjacent reinforcing ribs 2 can be made more uniform, so that the reinforcing ribs 2 can distribute the force more evenly, making the tab 121 less prone to wrinkling and deformation, ensuring that the contact area of ​​the connection point is stable and good, the resistance is kept at a low level, and the current can pass through the tab 121 smoothly, thereby improving the charging and discharging efficiency of the battery cell 10.

[0128] In some embodiments of this application, such as Figures 6-9 As shown, among the multiple reinforcing ribs 2, the reinforcing rib 2 near the root 122 extends to the root 122.

[0129] In other words, after the reinforcing rib 2 extends to the root 122, it is equivalent to the reinforcing rib 2 being connected to the electrode body. When the current flows from the electrode body to the tab 121, the reinforcing rib 2 can increase the current flow area, thereby reducing the resistance of the current on the tab 121, which reduces the resistance loss of the battery cell 10 during the charging and discharging process and can better improve the energy efficiency of the battery cell 10.

[0130] In the above example, by extending the reinforcing ribs 2 near the root 122 to the root 122, when the current flows from the electrode body to the tab 121, the reinforcing ribs 2 can increase the current flow area, thereby reducing the resistance of the current on the tab 121, reducing the resistance loss of the battery cell 10 during the charging and discharging process, and improving the energy efficiency of the battery cell 10.

[0131] In some embodiments of this application, such as Figures 6-9 As shown, among the multiple reinforcing ribs 2, the reinforcing rib 2 closest to the head 123 extends to the head 123.

[0132] In the above example, by extending the reinforcing rib 2 to the head 123, external forces can be dispersed along the first reinforcing rib 21 and the second reinforcing rib 22, preventing stress concentration at the head 123 and effectively preventing wrinkles or breakage of the head 123. Furthermore, this design increases the structural strength of the tab 121, enabling it to withstand larger currents and reducing resistance, thereby improving the charging and discharging efficiency of the battery cell 10. Simultaneously, the robust head 123 structure helps maintain the stability of the connection between the tab 121 and the external circuit, ensuring a stable and good contact area at the connection point, keeping the resistance at a low level, and allowing current to flow smoothly through the tab 121, thus improving the charging and discharging efficiency of the battery cell 10.

[0133] In some embodiments of this application, such as Figure 6 As shown, the end of the tab 121 away from the root 122 is the head 123. In the direction from the root 122 to the head 123, the size of the tab 121 is H1, the size of the first reinforcing rib 21 is H2, and the size of the second reinforcing rib 22 is H3, satisfying: 1 / 10≤H2 / H1≤1, and / or, 1 / 10≤H3 / H1≤1.

[0134] In other words, in the projection plane parallel to the direction from the root 122 to the head 123, the first reinforcing rib 21 may partially overlap with the second reinforcing rib 22, or the first reinforcing rib 21 may not overlap with the second reinforcing rib 22. Furthermore, it should be noted that even if the first reinforcing rib 21 partially overlaps with the second reinforcing rib 22, it may be as follows: Figure 9As shown, two reinforcing ribs 2 are spaced apart in the direction from the root 122 to the head 123. When the above conditions are met, the first reinforcing rib 21 and the second reinforcing rib 22 can effectively disperse stress when the tab 121 is under stress, avoiding the inability to effectively resist external forces due to excessively small size, or the abnormal concentration of local stress due to excessively large size, further enhancing the tensile and bending resistance of the tab 121. Regarding structural stability, the appropriate size ratio allows the first reinforcing rib 21 and the second reinforcing rib 22 to form a stable overall structure with the tab 121. Under complex working conditions such as vibration and impact, they can work together to maintain the stable shape of the tab 121, reducing the risk of structural deformation. This ensures a stable and good contact area at the connection point, keeping the resistance at a low level, allowing current to flow smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0135] In the above example, by satisfying the above conditions, the first reinforcing rib 21 and the second reinforcing rib 22 can better disperse the force on the tab 121, making the tab 121 less prone to wrinkling and bending, ensuring that the contact area of ​​the connection point is stable and good, the resistance is kept at a low level, and the current can pass smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0136] In some embodiments of this application, such as Figure 6 As shown, the dimensions H1 of the tab 121, H2 of the first reinforcing rib 21, and H3 of the second reinforcing rib 22 satisfy: 2 / 3≤H2 / H1≤1, and / or, 2 / 3≤H3 / H1≤1.

[0137] In other words, in the projection plane parallel to the direction from the root 122 to the head 123, the first reinforcing rib 21 may partially overlap with the second reinforcing rib 22, or the first reinforcing rib 21 may not overlap with the second reinforcing rib 22. Furthermore, it should be noted that even if the first reinforcing rib 21 partially overlaps with the second reinforcing rib 22, it may be as follows: Figure 9As shown, two reinforcing ribs 2 are spaced apart in the direction from the root 122 to the head 123. When the above conditions are met, the first reinforcing rib 21 and the second reinforcing rib 22 can effectively disperse stress when the tab 121 is under stress, avoiding the inability to effectively resist external forces due to excessively small size, or the abnormal concentration of local stress due to excessively large size, further enhancing the tensile and bending resistance of the tab 121. Regarding structural stability, the appropriate size ratio allows the first reinforcing rib 21 and the second reinforcing rib 22 to form a stable overall structure with the tab 121. Under complex working conditions such as vibration and impact, they can work together to maintain the stable shape of the tab 121, reducing the risk of structural deformation. This ensures a stable and good contact area at the connection point, keeping the resistance at a low level, allowing current to flow smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0138] In the above example, by satisfying the above conditions, the first reinforcing rib 21 and the second reinforcing rib 22 can better disperse the force on the tab 121, making the tab 121 less prone to wrinkling and bending, ensuring that the contact area of ​​the connection point is stable and good, the resistance is kept at a low level, and the current can pass smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0139] In some embodiments of this application, a first reinforcing rib 21 and a second reinforcing rib 22 are arranged on at least one side of the tab 121.

[0140] For example, the first reinforcing rib 21 and the second reinforcing rib 22 can be arranged on one side of the tab 121. The first reinforcing rib 21 and the second reinforcing rib 22 can effectively enhance the structural strength of the tab 121 and better disperse the force on the tab 121, making the tab 121 less prone to wrinkling and bending, ensuring that the contact area of ​​the connection point is stable and good, and keeping the resistance at a low level, so that the current can pass smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0141] For example, the first reinforcing rib 21 and the second reinforcing rib 22 can also be arranged on the two sides of the tab 121. The first reinforcing rib 21 and the second reinforcing rib 22 on the two sides can further enhance the structural strength of the tab 121 and further disperse the force on the tab 121, making the tab 121 less prone to wrinkling and bending, enabling it to withstand greater current, reduce resistance, and thereby improve the charging and discharging efficiency of the battery cell 10.

[0142] In the above example, by arranging the first reinforcing rib 21 and the second reinforcing rib 22 on the side of the tab 121, the first reinforcing rib 21 and the second reinforcing rib 22 can effectively enhance the structural strength of the tab 121 and better disperse the force on the tab 121, making the tab 121 less prone to wrinkling and bending, ensuring that the contact area of ​​the connection point is stable and good, and keeping the resistance at a low level, so that the current can pass smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0143] In some embodiments of this application, the first reinforcing rib 21 and the second reinforcing rib 22 are stamped from the tab 121.

[0144] Stamping is a simple and efficient method, eliminating the need for additional splicing or welding processes, reducing production steps, improving production efficiency, and lowering the defect rate caused by complex assembly processes. Furthermore, directly stamping the first reinforcing rib 21 and the second reinforcing rib 22 from the tab 121 avoids additional material procurement and waste, reducing production costs while ensuring the performance of the first and second reinforcing ribs 21 and 22. In addition, the first and second reinforcing ribs 21 and 22 enhance the strength and toughness of the tab 121. When subjected to external forces, the first and second reinforcing ribs 21 and 22 can disperse stress, improving the tab 121's tensile, bending, and torsional resistance.

[0145] In the above example, by stamping the first reinforcing rib 21 and the second reinforcing rib 22 on the tab 121, the production steps can be reduced, production efficiency can be improved, and production costs can be reduced. In addition, the first reinforcing rib 21 and the second reinforcing rib 22 can enhance the strength and toughness of the tab 121. When subjected to external force, the first reinforcing rib 21 and the second reinforcing rib 22 can disperse stress, improve the tensile, bending and torsional resistance of the tab 121, ensure that the contact area of ​​the connection point is stable and good, and keep the resistance at a low level, so that the current can pass smoothly through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10.

[0146] In some embodiments of this application, tab 121 is a positive tab, and the thickness D1 of the positive tab satisfies: 10μm≤D1≤20μm, and / or tab 121 is a negative tab, and the thickness D2 of the negative tab satisfies: 3μm≤D2≤10μm.

[0147] For example, the thickness D1 of the positive electrode tab satisfies: 10μm≤D1≤15μm.

[0148] For example, the thickness D1 of the positive electrode tab can be 10μm, 11μm, 12μm, 13μm, 14μm, 15μm, 16μm, 17μm, 18μm, 19μm, or 20μm.

[0149] For example, the thickness D2 of the negative electrode tab satisfies: 3μm≤D2≤8μm.

[0150] For example, the thickness D2 of the negative electrode tab can be 3μm, 4μm, 5μm, 6μm, 7μm, 8μm, 9μm, or 10μm.

[0151] In the above example, by designing the thickness of the tab 121, the structural strength of the tab 121 can be improved, and the tensile, bending and torsional resistance of the tab 121 can be enhanced. This ensures that the contact area of ​​the connection point is stable and good, the resistance is kept at a low level, and the current can pass through the tab 121 smoothly, thereby improving the charging and discharging efficiency of the battery cell 10.

[0152] For example, the tab 121 can be made of metal material. Specifically, the positive tab can be aluminum tab 121 and the negative tab can be copper tab 121.

[0153] This application also proposes a battery device 100 having the battery cell 10 of the above embodiments.

[0154] According to the battery device 100 of the present application, by providing the battery cell 10 of the above embodiment, since the tab 121 of the battery cell 10 is not easily wrinkled or bent, the contact area of ​​the connection point can be ensured to be stable and good, the resistance is kept at a low level, and the current can smoothly pass through the tab 121, thereby improving the charging and discharging efficiency of the battery cell 10. Therefore, the battery device 100 of the present application can have better charging and discharging efficiency.

[0155] The aforementioned battery device 100 can be applied to, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among these, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., while spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0156] This application also proposes an electrical device.

[0157] According to the embodiments of this application, the power-consuming device may include a battery device 100, which is used to store or provide electrical energy.

[0158] In the above example, by providing the battery device 100 of the above example, the power-consuming device of this application can have high power consumption efficiency.

[0159] Since the battery device 100 and the power-consuming device of this application adopt all the technical solutions of all the above embodiments, they also have all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be repeated here. In the description of this specification, the descriptions of terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0160] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery cell (10) characterized by, include: Shell (11); An electrode assembly (12) is housed within the housing (11). The electrode assembly (12) includes multiple electrode plates, each electrode plate including an electrode plate body and an electrode tab (121). The root (122) of the electrode tab (121) is connected to the electrode plate body. At least one electrode tab (121) includes a first reinforcing rib (21) and a second reinforcing rib (22). Both the first reinforcing rib (21) and the second reinforcing rib (22) are strip-shaped. The angle between the length direction of the first reinforcing rib (21) and the length direction of the second reinforcing rib (22) is an acute angle. The end of the first reinforcing rib (21) near the root (122) and the end of the second reinforcing rib (22) near the root (122) are connected.

2. The battery cell (10) according to claim 1, characterized in that The end of the tab (121) away from the root (122) is the head (123) of the tab (121), and the opening of the angle formed between the first reinforcing rib (21) and the second reinforcing rib (22) faces the head (123).

3. The battery cell (10) according to claim 1, characterized in that The included angle α between the length direction of the first reinforcing rib (21) and the length direction of the second reinforcing rib (22) satisfies: 30°≤a≤45°.

4. The battery cell (10) according to claim 1, characterized in that Multiple first reinforcing ribs (21) and multiple second reinforcing ribs (22) are provided, and the multiple first reinforcing ribs (21) and multiple second reinforcing ribs (22) are arranged alternately. The end of the second reinforcing rib (22) near the root (122) is connected to the end of one first reinforcing rib (21) near the root (122), and the end of the second reinforcing rib (22) away from the root (122) is connected to the end of another first reinforcing rib (21) away from the root (122).

5. The battery cell (10) according to claim 1, characterized in that The first reinforcing rib (21) and the second reinforcing rib (22) both extend to the root (122) at one end near the root (122).

6. The battery cell (10) according to claim 1, characterized in that The end of the tab (121) away from the root (122) is the head (123), the first reinforcing rib (21) extends to the head (123) from the end near the head (123), and / or the second reinforcing rib (22) extends to the head (123) from the end near the head (123).

7. The battery cell (10) according to claim 1, characterized in that The end of the electrode tab (121) away from the root (122) is the head (123). The electrode tab (121) includes a plurality of reinforcing ribs (2). Along the direction from the root (122) to the head (123), the plurality of reinforcing ribs (2) are arranged in sequence. Each reinforcing rib (2) includes a first reinforcing rib (21) and a second reinforcing rib (22).

8. The battery cell (10) according to claim 7, characterized in that The connection between the first reinforcing rib (21) and the second reinforcing rib (22) is a tip (31), wherein, in the direction from the root (122) to the head (123), the tip (31) of one reinforcing rib (2) is misaligned with the tip (31) of the other reinforcing rib (2).

9. The battery cell (10) according to claim 7, characterized in that The connection between the first reinforcing rib (21) and the second reinforcing rib (22) is a tip (31), wherein, in the direction from the root (122) to the head (123), the tip (31) of one reinforcing rib (2) is opposite to the tip (31) of the other reinforcing rib (2).

10. The battery cell (10) according to claim 7, characterized in that Of the plurality of reinforcing ribs (2), the reinforcing rib (2) closest to the root (122) extends to the root (122).

11. The battery cell (10) according to claim 7, characterized in that Of the plurality of reinforcing ribs (2), the reinforcing rib (2) closest to the head (123) extends to the head (123).

12. The battery cell (10) according to claim 1, characterized in that The end of the tab (121) away from the root (122) is the head (123). In the direction from the root (122) to the head (123), the size of the tab (121) is H1, the size of the first reinforcing rib (21) is H2, and the size of the second reinforcing rib (22) is H3, satisfying: 1 / 10≤H2 / H1≤1, and / or, 1 / 10≤H3 / H1≤1.

13. The battery cell (10) according to claim 12, characterized in that The dimensions H1 of the tab (121), H2 of the first reinforcing rib (21), and H3 of the second reinforcing rib (22) satisfy: 2 / 3≤H2 / H1≤1, and / or, 2 / 3≤H3 / H1≤1.

14. The battery cell (10) according to claim 1, characterized in that The first reinforcing rib (21) and the second reinforcing rib (22) are arranged on at least one side of the tab (121).

15. The battery cell (10) according to claim 1, characterized in that The first reinforcing rib (21) and the second reinforcing rib (22) are stamped from the tab (121).

16. The battery cell (10) according to claim 1, characterized in that The tab (121) is a positive tab, and the thickness D1 of the positive tab satisfies: 10μm≤D1≤20μm, and / or the tab (121) is a negative tab, and the thickness D2 of the negative tab satisfies: 3μm≤D2≤10μm.

17. A battery device (100), characterized by Includes the battery cell (10) according to any one of claims 1-16.

18. An electrical device, comprising: Includes the battery device (100) of claim 17, the battery device (100) being used to provide or store electrical energy.

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