Batteries and electrical devices

Abstract

This application provides a battery and an electrical device, relating to the field of battery technology. The battery includes a cell and a protection board. The cell includes a cell body and a negative electrode casing covering the cell body. A positive electrode post is disposed on the cell body and exposed in the negative electrode casing. The protection board has a first window, a second window, a first electrical connection portion exposed in the first window, and a second electrical connection portion exposed in the second window. The first electrical connection portion is connected to the positive electrode post via a first conductive adhesive, and the second electrical connection portion is connected to the negative electrode casing via a second conductive adhesive. This battery can increase the cell capacity.

Description

Technical Field

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

[0002] With the increasing popularity of portable electronic devices and the rising performance requirements, lithium-ion batteries have become a mainstream energy supply solution and are widely used.

[0003] Traditional steel-cased battery structures mainly consist of cells and protection boards. Electrical conduction between the cells and protection boards is achieved by welding nickel sheets. When welding nickel sheets, a solder pad area needs to be reserved and a certain amount of space is occupied, which reduces the effective volume utilization rate of the cells and affects the cell capacity. Utility Model Content

[0004] The purpose of this application includes, for example, providing a battery and power device that can increase cell capacity.

[0005] The embodiments of this application can be implemented as follows:

[0006] In a first aspect, embodiments of this application provide a battery comprising:

[0007] A battery cell, comprising a battery cell body and a negative electrode shell covering the battery cell body, wherein a positive electrode post is disposed on the battery cell body and the positive electrode post is exposed in the negative electrode shell;

[0008] The protective plate has a first window, a second window, a first electrical connection portion exposed in the first window, and a second electrical connection portion exposed in the second window. The first electrical connection portion is connected to the positive electrode post through a first conductive adhesive, and the second electrical connection portion is connected to the negative electrode shell through a second conductive adhesive.

[0009] Optionally, the first electrical connection portion is provided with a first antioxidant layer, the first antioxidant layer being connected to the first conductive adhesive, and / or, the second electrical connection portion is provided with a second antioxidant layer, the second antioxidant layer being connected to the second conductive adhesive.

[0010] Optionally, the first antioxidant layer is a nickel-gold alloy layer or an organic solderable protective layer, and / or the second antioxidant layer is a nickel-gold alloy layer or an organic solderable protective layer.

[0011] Optionally, the thickness of the first antioxidant layer is 3 to 8 μm, and / or the thickness of the second antioxidant layer is 3 to 8 μm.

[0012] Optionally, the first conductive adhesive is used to cure after thermal activation, and the end face area of ​​the positive electrode post is larger than the end face area of ​​the first antioxidant layer.

[0013] Optionally, the protective plate is a cuboid, with the first window located on one side of the protective plate and the second window located on the bottom surface of the protective plate.

[0014] Optionally, the negative electrode housing is provided with a notch to accommodate the protective plate.

[0015] Optionally, the negative electrode housing has a first surface and a second surface perpendicular to each other within the notch, the positive electrode post is exposed on the first surface, and the second electrical connection portion is connected to the second surface by a second conductive adhesive.

[0016] Optionally, the negative electrode housing also has an outer side surface connected to the second surface, and the side of the protective plate facing away from the positive electrode post is flush with the outer side surface.

[0017] Optionally, the thickness of both the first conductive adhesive and the second conductive adhesive is 50-100 μm.

[0018] Optionally, both the first conductive adhesive and the second conductive adhesive are graphene conductive silicone.

[0019] Secondly, this application also provides an electrical device, including the aforementioned battery.

[0020] The beneficial effects of the battery and power device provided in this application include, for example, in order to improve the cell capacity, a battery is designed, which includes a cell and a protection board. The cell includes a cell body and a negative electrode shell covering the cell body. A positive electrode post is provided on the cell body and exposed in the negative electrode shell. The protection board is provided with a first window, a second window, a first electrical connection portion exposed in the first window, and a second electrical connection portion exposed in the second window. The first electrical connection portion is connected to the positive electrode post through a first conductive adhesive, and the second electrical connection portion is connected to the negative electrode shell through a second conductive adhesive.

[0021] By opening a first window and a second window on the protection board to expose the corresponding first electrical connection and second electrical connection, and using a first conductive adhesive and a second conductive adhesive to connect the first electrical connection and the second electrical connection to the positive terminal and the negative terminal shell respectively, the problem of the original nickel sheet occupying the cell space is solved by simplifying the protection board structure and optimizing the assembly method. This is conducive to increasing the cell capacity and meeting the current demand of electrical devices for both thinness and high energy density. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the battery in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the battery cell in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the protection plate in an embodiment of this application.

[0026] Icons: 10-Battery; 100-Cell; 110-Negative electrode casing; 111-Notch; 1111-First surface; 1112-Second surface; 112-Outer surface; 120-Positive electrode post; 200-Protection plate; 210-First electrical connection; 220-Second electrical connection. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0033] Existing steel-cased batteries typically consist of two independent modules: a battery cell and a protection board, connected by welding. The protection board features irregularly shaped nickel sheets as extensions of the conductive path, which are spot-welded to the positive and negative electrodes of the battery cell. While this design achieves basic electrical connection, it suffers from significant structural drawbacks: due to the length and thickness of the nickel sheets, additional space must be reserved on the bottom and sides of the protection board for welding operations, increasing its overall size and encroaching on the available space for the battery cell material, thus affecting the overall capacity performance of the cell. Furthermore, the nickel sheet welding process is complex, involves numerous steps, has high manufacturing costs, and impacts production efficiency. The embodiments of this application provide a battery that at least addresses the aforementioned technical problems.

[0034] Please refer to Figures 1-3 The battery 10 provided in the embodiments of this application includes a cell 100 and a protection board 200. The cell 100 includes a cell body and a negative electrode shell 110 covering the cell body. A positive electrode post 120 is provided on the cell body and is exposed in the negative electrode shell 110. The protection board 200 is provided with a first window, a second window, a first electrical connection portion 210 exposed in the first window, and a second electrical connection portion 220 exposed in the second window. The first electrical connection portion 210 is connected to the positive electrode post 120 through a first conductive adhesive, and the second electrical connection portion 220 is connected to the negative electrode shell 110 through a second conductive adhesive.

[0035] The protection board 200 has a first window and a second window, which expose the first electrical connection portion 210 and the second electrical connection portion 220 inside the protection board 200, respectively. The first electrical connection portion 210 and the second electrical connection portion 220 serve as metal pads, typically made of copper. The first electrical connection portion 210 is used for electrical connection with the positive terminal 120 of the battery cell 100, and the second electrical connection portion 220 is used for electrical connection with the negative terminal casing 110. These two electrical connections are achieved using a first conductive adhesive and a second conductive adhesive, respectively. This design replaces the original structure that required welding with irregularly shaped nickel sheets, thus saving the layout space of the nickel sheets on the protection board 200 and the process space required for welding.

[0036] In this embodiment, the nickel sheet structure is eliminated, and only the necessary metal pads are retained and directly connected to the positive and negative terminals of the cell 100 through conductive adhesive. The space occupied by the protection board 200 is significantly reduced, thereby providing more usable volume for the cell 100.

[0037] By replacing the existing nickel sheet welding structure with conductive adhesive bonding, and designing the window layout and corresponding electrical connection positions of the protection board 200, not only was a stable electrical connection achieved, but the utilization rate of the internal space of the battery 10 was also effectively improved. It is understandable that by simplifying the structure of the protection board 200 and optimizing the assembly method, the problem of the original nickel sheets occupying space in the battery cell 100 was solved, thereby contributing to an increase in the capacity of the battery cell 100.

[0038] In this embodiment, the first electrical connection portion 210 is provided with a first antioxidant layer, and / or the second electrical connection portion 220 is provided with a second antioxidant layer. The first antioxidant layer is connected to the first conductive adhesive, and the second antioxidant layer is connected to the second conductive adhesive.

[0039] Since the first electrical connection portion 210 and the second electrical connection portion 220 are respectively used to establish electrical connections with the positive electrode post 120 and the negative electrode shell 110 of the battery cell 100 through the first conductive adhesive and the second conductive adhesive, in order to prevent the surfaces of the first electrical connection portion 210 and the second electrical connection portion 220 from undergoing oxidation reaction due to prolonged exposure to air, which would affect the bonding quality and conductivity between the conductive adhesive and the electrical connection portion, a first anti-oxidation layer and a second anti-oxidation layer can be respectively provided on the surfaces of the first electrical connection portion 210 and the second electrical connection portion 220. The first anti-oxidation layer is in direct contact with the first conductive adhesive, and the second anti-oxidation layer is in direct contact with the second conductive adhesive, thereby isolating the external environment and delaying or preventing the oxidation of the metal surface of the electrical connection portion.

[0040] As part of a conductive metal structure, the surface of the electrical connection is susceptible to oxidation from moisture, oxygen, or other corrosive substances in the air when unprotected. This oxide layer reduces the adhesion strength and electrical conductivity between the conductive adhesive and the metal surface of the electrical connection, thus affecting the overall electrical connection reliability of the battery 10. This embodiment addresses this by providing a first anti-oxidation layer and a second anti-oxidation layer on the surfaces of the first electrical connection 210 and the second electrical connection 220, respectively. This maintains good conductivity and stability of the bonding interface during the application and bonding of the conductive adhesive, ensuring that the conductive adhesive adheres firmly to the anti-oxidation layer and achieves good current conduction performance.

[0041] It should be noted that the main purpose of introducing the antioxidant layer is to form a chemically stable, highly conductive, and non-reactive intermediate layer between the electrical connection and the conductive adhesive through a combination of material selection and surface treatment processes, thereby maintaining the stability of the electrical connection during the long-term use of the battery 10.

[0042] In this embodiment, the first antioxidant layer is a nickel-gold alloy layer or an organic solderable protective layer, and / or, the second antioxidant layer is a nickel-gold alloy layer or an organic solderable protective layer.

[0043] It should be noted that the metal surfaces of the first electrical connection portion 210 and the second electrical connection portion 220 are prone to oxidation when exposed to air. The formation of oxides significantly reduces their conductivity and the bonding strength with the conductive adhesive. Therefore, it is particularly important to select a material that can effectively isolate oxygen and moisture while possessing good conductivity and interfacial adhesion properties as the anti-oxidation layer.

[0044] In an optional embodiment, both the first and second anti-oxidation layers are nickel-gold alloy layers. It should be noted that nickel in the nickel-gold alloy layer has high chemical stability, enabling it to form a dense oxide film on the metal substrate surface to prevent further oxidation, while gold has excellent conductivity and corrosion resistance. The alloy layer formed by the combination of these two elements not only possesses excellent anti-oxidation properties but also good conductivity, which helps improve the uniformity of the conductive adhesive's spread and its adhesion strength on its surface.

[0045] The forming process of the nickel-gold alloy layer is as follows: First, windows are opened on the side of the protective plate 200 to expose the corresponding electrical connection parts. In this embodiment, a first window and a second window are opened on the side of the protective plate 200, exposing the first electrical connection part 210 and the second electrical connection part 220 respectively. After exposing the electrical connection parts, pretreatment is required, such as degreasing, micro-etching, and activation, to remove oxides, grease, and other contaminants from the metal surface and improve the adhesion of subsequent plating layers. Subsequently, a dense nickel layer is deposited on the surface of the electrical connection parts using a chemical nickel plating process. This nickel layer not only has good corrosion resistance and wear resistance, but also achieves uniform coverage without external current. In addition, the nickel layer can serve as the bottom support for the subsequent gold plating process. After the nickel layer is deposited, the electroplating gold process is performed immediately. By setting appropriate current density, plating solution composition, and electroplating time, gold elements are uniformly deposited on the surface of the nickel layer, ultimately forming a nickel-gold alloy layer.

[0046] In another optional embodiment, both the first and second antioxidant layers are organic solderable protective layers (OSP). It should be noted that organic solderable protective layers are typically composed of organic compounds with a certain molecular weight, capable of forming a dense protective film on the metal surface to physically isolate oxygen and moisture from the air, thereby slowing down the oxidation process of the metal surface. Simultaneously, such materials possess a certain degree of thermal stability and chemical inertness, and are not prone to decomposition or adverse reactions with other materials during the coating and curing process of conductive adhesive, thus maintaining a stable connection interface. Furthermore, organic solderable protective layers can be formed through a simple coating process, offering high process compatibility and cost advantages.

[0047] In this embodiment, the thickness of the first antioxidant layer is 3-8 μm, and / or the thickness of the second antioxidant layer is 3-8 μm.

[0048] To ensure that the antioxidant layer can effectively isolate oxygen and moisture in the air without causing spatial burden on the assembly structure or affecting the bonding quality of the conductive adhesive, the thickness of the antioxidant layer is limited to 3–8 μm.

[0049] In practical applications, the thickness of the anti-oxidation layer directly affects its protective performance. If the thickness is too thin, for example, less than 3μm, a continuous and dense protective layer may not be formed, leading to localized exposure of the metal surface and thus affecting its oxidation resistance and conductivity. Furthermore, an excessively thin coating is more prone to peeling due to wear or stress during subsequent processing or use, reducing long-term reliability. Conversely, if the anti-oxidation layer is too thick, for example, exceeding 8μm, it not only increases manufacturing costs but may also affect the overall spatial layout of the protective plate 200 due to coating volume expansion.

[0050] It should be noted that the thickness range of the anti-oxidation layer is not arbitrarily set, but rather an optimized result based on a comprehensive evaluation of anti-oxidation performance, conductivity, and process compatibility. Anti-oxidation layers such as nickel-gold alloy layers or organic solderable protective layers, within a thickness range of 3–8 μm, can effectively balance oxidation resistance and machinability. Within this range, the anti-oxidation layer possesses sufficient density to prevent oxidation reactions without significantly interfering with the curing process of the conductive adhesive, thus ensuring good interfacial adhesion and stable electrical conductivity.

[0051] In this embodiment, the first conductive adhesive is used to cure after thermal activation, and the end face area of ​​the positive electrode post 120 is larger than the end face area of ​​the first antioxidant layer.

[0052] It should be noted that the first conductive adhesive is a type of conductive adhesive that cures after heat activation. This type of conductive adhesive has a certain degree of fluidity and plasticity in its initial state. Under heating conditions, it undergoes a chemical cross-linking reaction, eventually forming a solid connection layer with a certain mechanical strength and conductivity. This ensures that the first electrical connection part 210 of the protection board 200 can establish a stable electrical connection with the positive terminal post 120 of the battery cell 100. Of course, the second conductive adhesive can also be a type of conductive adhesive that cures after heat activation, ensuring that the second electrical connection part 220 and the negative terminal shell 110 establish a stable electrical connection.

[0053] Because this type of conductive adhesive has a certain degree of fluidity before curing, if the geometric relationship of the bonding interface is not properly designed during actual operation, there is a risk that the conductive adhesive will spread outward and overflow into unexpected areas during the bonding process, which may contaminate other metal parts or affect the insulation performance of the overall structure of the battery 10.

[0054] The end face of the positive electrode post 120 is the surface of the positive electrode post 120 facing the first electrical connection portion 210, and the end face of the first anti-oxidation layer is the surface of the first anti-oxidation layer facing away from the first electrical connection portion 210. By limiting the end face area of ​​the positive electrode post 120 to be larger than the end face area of ​​the first anti-oxidation layer, when the first conductive adhesive is coated on the surface of the first anti-oxidation layer and bonded, the first conductive adhesive can obtain a certain lateral extension space on the end face of the positive electrode post 120, thereby effectively controlling its flow range. Since the end face size of the positive electrode post 120 is relatively large, the first conductive adhesive is confined to the area covered by the end face of the positive electrode post 120 under pressure, reducing the possibility of the first conductive adhesive flowing to the negative electrode shell 110.

[0055] In this embodiment, the protective plate 200 is a cuboid, with a first window opened on one side of the protective plate 200 and a second window opened on the bottom surface of the protective plate 200.

[0056] It is understandable that by opening the first window and the second window on two different surfaces of the protective plate 200, on the one hand, it can effectively avoid mutual interference between the electrical connection between the first electrical connection part 210 and the positive terminal post 120 and the electrical connection between the second electrical connection part 220 and the negative terminal shell 110, and on the other hand, it can facilitate the operation of the operator.

[0057] In other embodiments, the protection plate 200 may have only one window exposing an electrical connection portion. This connection portion is connected to the positive terminal 120 and the negative terminal housing 110 respectively via two conductive adhesives. One of the conductive adhesives is annular, surrounding the other conductive adhesive and spaced apart from it. Both conductive adhesives are connected to the electrical connection portion. The annular conductive adhesive is connected to the negative terminal housing 110, and the other conductive adhesive is connected to the positive terminal 120. The other conductive adhesive can be annular or rectangular. Furthermore, to prevent conductivity between the two conductive adhesives, insulating adhesive can be provided in the gap between them.

[0058] In some embodiments, the negative electrode casing 110 is provided with a notch 111 for accommodating the protection plate 200. It is understood that the shape of the battery cell 100 matches that of the negative electrode casing 110, and it also has a notch. The protection plate 200 is accommodated in the notch 111, so that the protection plate 200 does not protrude from the outside of the battery cell 100, which helps to ensure the flatness of the overall outer surface of the battery 10.

[0059] The negative electrode housing 110 has a first surface 1111 and a second surface 1112 that are perpendicular to each other within the notch 111, and the positive electrode post 120 is exposed on the first surface 1111; the second electrical connection part 220 is connected to the second surface 1112 through the second conductive adhesive.

[0060] It should be noted that the first surface 1111, as the exposed area of ​​the positive terminal 120, provides a positioning reference for the bonding of the first conductive adhesive between the first electrical connection 210 and the positive terminal 120; while the second surface 1112, as the interface in contact with the second conductive adhesive corresponding to the second electrical connection 220, undertakes the function of negative electrode conduction. By attaching the protective plate 200 to these two mutually perpendicular surfaces and bonding it with conductive adhesive, not only can the stability of the electrical connection be achieved, but the protective plate 200 can also be limited by the notch 111 structure in both the direction perpendicular to the first surface 1111 and the direction perpendicular to the second surface 1112, thereby reducing the space occupied by the protective plate 200 in the directions perpendicular to the first surface 1111 and the second surface 1112.

[0061] When the battery 10 is square, the first surface 1111 can be parallel to two sides of the battery 10 in the width direction at the same time, and the second surface 1112 is connected to one of the sides. At this time, the protection plate 200 reduces the space occupied in the direction perpendicular to the first surface 1111, that is, the protection plate 200 reduces the space occupied in the width direction of the battery 10; the protection plate 200 reduces the space occupied in the direction perpendicular to the second surface 1112, that is, the protection plate 200 reduces the space occupied in the length direction of the battery 10.

[0062] In this embodiment, the negative electrode shell 110 also has an outer side surface 112 connected to the second surface 1112, and the side of the protective plate 200 facing away from the positive electrode post 120 is flush with the outer side surface 112.

[0063] In the existing technical solution that uses nickel strips to connect the protection board 200 and the cell 100, in order to achieve the electrical connection between the protection board 200 and the negative electrode shell 110, the nickel strips usually need to be extended from the bottom of the protection board 200 and bent to the outer side 112 of the negative electrode shell 110 for welding. This results in the side of the protection board 200 not being flush with the outer side 112 of the negative electrode shell 110, which limits the expansion of the cell 100 volume and thus indirectly affects the improvement of the battery 10 capacity.

[0064] By eliminating the nickel sheet structure and using conductive adhesive to directly establish an electrical connection between the second electrical connection part 220 and the second surface 1112, the protection plate 200 can complete the electrical connection with the negative electrode shell 110 without relying on the nickel sheet. The side of the protection plate 200 away from the positive electrode post 120 can be flush with the outer side 112 of the negative electrode shell 110. For the square battery 10, this provides more usable volume for the cell 100 in the width direction of the battery 10, which is beneficial to increasing the capacity of the cell 100.

[0065] In this embodiment, the thickness of both the first conductive adhesive and the second conductive adhesive is 50-100 μm.

[0066] In existing technologies that weld nickel sheets to the battery cell 100, the nickel sheet itself has a certain thickness, typically about 100 μm, to ensure sufficient structural support and conductivity during welding. Furthermore, a layer of solder paste needs to be applied between the nickel sheet and the protection board 200 to achieve effective bonding during welding; this solder paste layer is generally between 50 and 100 μm thick. Therefore, after stacking, the total thickness occupied by the nickel sheet and solder paste often exceeds 150 μm. This space not only increases the overall thickness of the protection board 200 but also compresses the usable volume of the battery cell 100, thus limiting the capacity increase of the battery 10.

[0067] By directly using conductive adhesive as the connection medium between the protection board 200 and the battery cell 100, only a conductive adhesive layer with a thickness of 50-100 μm is needed between the first electrical connection part 210 and the positive electrode post 120, and between the second electrical connection part 220 and the negative electrode shell 110, to complete the electrical connection and mechanical fixing functions. This design not only reduces the thickness originally occupied by the nickel sheet and solder paste, but also avoids the problem of additional structural height increase caused by the soldering process, thus significantly reducing the overall thickness of the protection board 200 and freeing up more space for the capacity expansion of the battery cell 100.

[0068] In this embodiment, both the first conductive adhesive and the second conductive adhesive are graphene conductive silicone.

[0069] Graphene is a two-dimensional material composed of a single layer of carbon atoms arranged in a hexagonal lattice. It possesses extremely high electron mobility, excellent mechanical strength, and outstanding thermal conductivity. When graphene is dispersed in a silicone matrix as a conductive filler, the resulting graphene-conductive silicone not only retains the inherent elasticity and aging resistance of silicone but also exhibits excellent conductivity. It can achieve high volumetric conductivity at a low filling ratio, thereby meeting the electrical connection requirements between the positive electrode post 120 and the first electrical connection portion 210, and between the negative electrode shell 110 and the second electrical connection portion 220 in battery 10.

[0070] It should be noted that while existing nickel-plated welding methods can ensure a stable conductive path, the process is complex. In this embodiment, graphene conductive silicone replaces the traditional welding structure, simplifying the assembly process. Furthermore, its elasticity and compressibility provide stress buffering capabilities at the interface between the protection plate 200 and the cell 100, improving assembly yield and enhancing the structural stability of the battery 10 under complex conditions such as vibration and impact. In addition, the graphene conductive silicone retains a certain degree of flexibility after curing, effectively compensating for stress accumulation caused by differences in the thermal expansion coefficients of different materials, preventing breakage or debonding at the connection interface due to long-term use.

[0071] In addition to graphene conductive silicone, in other embodiments, the first conductive adhesive and the second conductive adhesive can also be silver powder-filled conductive silicone, copper powder-filled conductive adhesive, or carbon nanotube conductive adhesive. Alternatively, the first conductive adhesive and the second conductive adhesive can also be conductive adhesives that cure at room temperature. Such conductive adhesives do not require heating for activation and are more convenient to use.

[0072] An embodiment of this application also provides an electrical device, including the battery 10 described above.

[0073] It should be noted that the battery 10 is suitable for electrical devices that are sensitive to internal space, such as smartphones, tablets, and laptops. These devices typically require the battery 10 to have high energy density and good assembly compatibility in order to meet the overall battery life requirements.

[0074] In summary, this application provides a battery 10 and an electrical device. By opening windows and corresponding electrical connection parts on the protection board 200, and replacing the existing nickel sheet welding structure of the battery 10 with a conductive adhesive bonding structure, not only is a stable electrical connection achieved, but the utilization rate of the internal space of the battery 10 is also effectively improved. By simplifying the structure of the protection board 200 and optimizing the assembly method, the problem of the original nickel sheet occupying space in the battery cell 100 is solved, thereby facilitating the increase of the battery cell 100 capacity and meeting the current dual requirements of electrical devices for thinness and high energy density.

[0075] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery, characterized by, include: A battery cell (100) includes a battery cell body and a negative electrode shell (110) covering the battery cell body. A positive electrode post (120) is disposed on the battery cell body and is exposed in the negative electrode shell (110). The protection plate (200) is provided with a first window, a second window, a first electrical connection part (210) exposed in the first window and a second electrical connection part (220) exposed in the second window. The first electrical connection part (210) is connected to the positive electrode post (120) through a first conductive adhesive, and the second electrical connection part (220) is connected to the negative electrode shell (110) through a second conductive adhesive.

2. The battery of claim 1, wherein, The first electrical connection portion (210) is provided with a first antioxidant layer, which is connected to the first conductive adhesive, and / or the second electrical connection portion (220) is provided with a second antioxidant layer, which is connected to the second conductive adhesive.

3. The battery of claim 2, wherein, The first antioxidant layer is a nickel-gold alloy layer or an organic solderable protective layer, and / or the second antioxidant layer is a nickel-gold alloy layer or an organic solderable protective layer.

4. The battery of claim 2, wherein, The thickness of the first antioxidant layer is 3-8 μm, and / or the thickness of the second antioxidant layer is 3-8 μm.

5. The battery of claim 2, wherein, The first conductive adhesive is used to cure after thermal activation, and the end face area of ​​the positive electrode post (120) is larger than the end face area of ​​the first antioxidant layer.

6. The battery of claim 1, wherein, The protective plate (200) is a cuboid, with the first window located on one side of the protective plate (200) and the second window located on the bottom surface of the protective plate (200).

7. The battery of claim 1, wherein, The negative electrode housing (110) is provided with a notch (111) to accommodate the protective plate (200).

8. The battery of claim 7, wherein, The negative electrode casing (110) has a first surface (1111) and a second surface (1112) that are perpendicular to each other within the notch (111), and the positive electrode post (120) is exposed on the first surface (1111); The second electrical connection part (220) is connected to the second surface (1112) through the second conductive adhesive.

9. The battery of claim 8, wherein, The negative electrode shell (110) also has an outer side (112) connected to the second surface (1112), and the side of the protective plate (200) facing away from the positive electrode post (120) is flush with the outer side (112).

10. The battery of claim 1, wherein, The thickness of both the first conductive adhesive and the second conductive adhesive is 50-100 μm.

11. The battery according to claim 1, characterized in that, Both the first conductive adhesive and the second conductive adhesive are graphene conductive silicone.

12. An electrical device, characterized by Includes the battery as described in any one of claims 1-11.

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