Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and relates to the technical field of batteries, the battery device comprises a shell, an electrode assembly, an electric adapter and lower plastic, the shell is provided with an end cover, the end cover is provided with an electrode terminal, the electrode assembly is arranged in the shell, the electrode assembly and the end cover are opposite and spaced, and the lower plastic is provided with an upper plastic; the electric adapter is arranged in the shell and located between the electrode assembly and the end cover, the electric adapter is connected with the electrode terminal and the electrode assembly, the lower plastic is arranged in the shell, the lower plastic is located between the electric adapter and the end cover and abuts against the electric adapter in the arrangement direction of the electrode assembly and the end cover, and the lower plastic is separated from the electrode assembly. And the side wall of the lower plastic cement is abutted against the shell. According to the battery device, the lower plastic cement is arranged to be separated from the electrode assembly, and the side wall of the lower plastic cement abuts against the shell, so that the probability of deformation of the electrode assembly can be reduced, the risk of short circuit in the battery device or self-discharge of the battery device can be reduced, and the reliability of the battery device can be improved.

Description

Technical Field

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

[0002] In related technologies, the battery device is provided with a lower plastic layer. The edge of the lower plastic layer can easily squeeze the electrode components in the battery device, causing the electrode components to deform. This can lead to the tabs being inserted downwards, resulting in a short circuit inside the battery device. If the electrode plates are wrinkled, it can cause self-discharge problems in the battery device, affecting the reliability of the battery device. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. Therefore, one objective of this application is to provide a battery device that can reduce the probability of electrode assembly deformation, lower the risk of internal short circuits or self-discharge within the battery device, and improve the reliability of the battery device.

[0004] This application also proposes an electrical device using the aforementioned battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, including: a housing, an electrode assembly, an electrical adapter, and a lower plastic. The housing has an end cap, on which electrode terminals are mounted. The electrode assembly is disposed within the housing, and the electrode assembly and the end cap are opposite to and spaced apart. The electrical adapter is disposed within the housing and located between the electrode assembly and the end cap, and the electrical adapter connects the electrode terminals and the electrode assembly. The lower plastic is disposed within the housing, and along the arrangement direction of the electrode assembly and the end cap, the lower plastic is located between the electrical adapter and the end cap and abuts against the electrical adapter. The lower plastic is spaced apart from the electrode assembly, and the sidewall of the lower plastic abuts against the housing.

[0006] In the above technical solution, by setting the lower plastic and the electrode assembly to be separated, and the sidewall of the lower plastic abutting against the outer shell, the probability of electrode assembly deformation can be reduced, the risk of short circuit or self-discharge of the battery device can be reduced, and the reliability of the battery device can be improved.

[0007] In some embodiments, the surface of the lower plastic facing the electrode assembly has a first boss and a second boss. The first boss is opposite to and abuts against the electrical adapter. The second boss is adjacent to the circumferential edge of the lower plastic and extends circumferentially along the lower plastic. The second boss is adjacent to the first boss. The outer circumferential surface of the second boss is configured as a guide bevel to facilitate the assembly of the lower plastic into the housing. The second boss is opposite to and spaced apart from the electrode assembly.

[0008] In the above technical solution, by setting the lower plastic to have a first boss and a second boss, the first boss can be opposite to and abut against the electrical adapter, and the second boss can be opposite to and spaced apart from the electrode assembly. While the lower plastic limits the electrical adapter, the electrode assembly can work normally, which can further improve the reliability of the electrode assembly and is more conducive to improving the reliability of the battery device.

[0009] In some embodiments, the protrusion height of the first boss is equal to the protrusion height of the second boss.

[0010] In the above technical solution, by setting the protrusion height of the first boss to be equal to the protrusion height of the second boss, it is more conducive to setting the second boss and the electrode assembly separately, which can achieve better protection of the electrode assembly, enabling the electrode assembly to work normally, further reducing the risk of short circuit or self-discharge of the battery device caused by electrode assembly deformation, which is more conducive to improving the reliability of the battery device, and also facilitates the production and processing of plastic, which helps to reduce costs.

[0011] In some embodiments, the protrusion height of the second boss is H1, and the width of the first boss is D1 along the arrangement direction of the first and second bosses, satisfying the relationship: 0.2≤H1 / D1≤0.6.

[0012] In the above technical solution, by reasonably setting the protrusion height of the second boss and the width of the first boss, the structure of the lower plastic can be stabilized, the lower plastic can play a good role in insulation and protection, and the second boss can be separated from the electrode assembly, which can protect the electrode assembly and enable the electrode assembly to work normally, which is more conducive to improving the reliability of the battery device.

[0013] In some embodiments, the protrusion height of the first boss is smaller than the protrusion height of the second boss.

[0014] In the above technical solution, by setting the protrusion height of the first boss to be smaller than that of the second boss, the second boss can play a better guiding role, allowing the lower plastic to be assembled more smoothly into the outer shell.

[0015] In some embodiments, the protrusion height of the second boss is H1, and the protrusion height of the first boss is H2, satisfying the relationship: 1 < H1 / H2 ≤ 1.2.

[0016] In the above technical solution, by reasonably setting the protrusion height of the second boss and the protrusion height of the first boss, the structure of the lower plastic can be stabilized, and the lower plastic can play a good role in insulation and protection. The second boss can also play a good guiding role, so that the lower plastic and the shell can be assembled smoothly. Furthermore, the second boss can be spaced apart from the electrode assembly, which can achieve a better protection effect for the electrode assembly, allowing the electrode assembly to work normally and further improving the reliability of the battery device.

[0017] In some embodiments, along the arrangement direction of the first boss and the second boss, the width dimension of the second boss is D2, and the protrusion height dimension of the first boss is H2, satisfying the relationship: 0.3H2≤D2≤0.6H2.

[0018] In the above technical solution, by reasonably setting the protrusion height of the first boss and the width of the second boss, the probability of deformation of the electrode assembly can be reduced, the effect of the first boss in abutting and limiting the electrical adapter can be enhanced, and the reliability of the second boss can be further improved.

[0019] In some embodiments, the first boss is arc-shaped and extends circumferentially along the lower plastic.

[0020] In the above technical solution, by constructing the first boss as an arc shape, the structural stability of the lower plastic and battery device can be improved, the stability of the electrical adapter can be improved, and the reliability of the battery device can be further improved.

[0021] In some embodiments, the second boss is annular.

[0022] In the above technical solution, the second protrusion is annular, which makes the shapes of the first protrusion and the second protrusion fit together. This helps to improve the overall structure of the lower plastic, allowing the lower plastic to be smoothly assembled with the outer shell. This also helps to improve the structural stability of the battery device and improve the insulation of the lower plastic, thus reducing the risk of internal short circuits in the battery device.

[0023] In some embodiments, there are multiple first bosses, which are arranged sequentially at intervals along the circumference of the lower plastic.

[0024] In the above technical solution, the multiple first protrusions can more evenly bear the pressure on the lower plastic, reduce the risk of damage to the internal components of the battery device due to excessive local pressure, reduce the probability of deformation, displacement or detachment of the lower plastic during long-term use, and further improve the reliability of the battery device. In addition, the multiple first protrusions can abut against the electrical adapter along the circumference of the lower plastic, which can further enhance the effect of the first protrusions on the abutment and limiting of the electrical adapter.

[0025] In some embodiments, the battery device is constructed in a cylindrical shape.

[0026] In the above technical solution, the lower plastic can be tightly fitted to the outer shell, which can improve the overall integrity of the battery device and help improve the sealing performance of the lower plastic.

[0027] Secondly, embodiments of this application also provide an electrical device, including the battery device described in the above embodiments.

[0028] 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

[0029] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0030] Figure 1 Schematic diagram of an electrical device provided for some embodiments of this application;

[0031] Figure 2 Schematic diagram of a battery device provided for some embodiments of this application;

[0032] Figure 3 Top view of a battery device provided for some embodiments of this application;

[0033] Figure 4 for Figure 3 Schematic diagram of the cross section at point AA;

[0034] Figure 5 for Figure 4 A magnified view of a portion of region B in the middle;

[0035] Figure 6 A schematic diagram illustrating the assembly of the end cap and electrical adapter according to some embodiments of this application;

[0036] Figure 7 This is an exploded view of the end cap and electrical adapter provided in some embodiments of this application.

[0037] Figure label:

[0038] Electrical appliance 100,

[0039] Battery device 110,

[0040] Outer shell 10, end cap 11, shell sidewall 12,

[0041] Electrode assembly 20,

[0042] Electrical adapter 30, first positioning part 31,

[0043] Lower plastic part 40, lower plastic body 41, first boss 42, second boss 43, second positioning part 44

[0044] Electrode terminal 50,

[0045] Insulation layer 60,

[0046] Controller 120, motor 130. Detailed Implementation

[0047] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0048] 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 described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims and foregoing drawings of this application are intended to cover non-exclusive inclusion.

[0050] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0053] In this application, "multiple" refers to two or more.

[0054] In this application, the battery device can be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., and the embodiments of this application are not limited in this regard. The battery device can be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited in this regard either. Battery devices are generally divided into three types according to their packaging method: cylindrical battery devices, prismatic battery devices, and pouch battery devices, and the embodiments of this application are not limited in this regard either.

[0055] A battery device may include a casing, electrode assemblies, and an electrolyte. The casing houses the electrode assemblies and the electrolyte. The electrode assemblies consist of a positive electrode, a negative electrode, and a separator. The battery device primarily operates by the movement of metal ions between the positive and negative electrode assemblies. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated positive current collector protrudes beyond the coated positive current collector, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the negative current collector without the negative active material layer protrudes from the one with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0056] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0057] In recent years, with the continuous development of new energy vehicles, battery devices, as the power source of electric vehicles, play an irreplaceable and crucial role. As a core component of new energy vehicles, battery devices require high reliability.

[0058] In related technologies, the battery device is provided with a lower plastic layer. The edge of the lower plastic layer can easily squeeze the electrode components in the battery device, causing the electrode components to deform. This can lead to the tabs being inserted downwards, resulting in a short circuit inside the battery device. If the electrode plates are wrinkled, it can cause self-discharge problems in the battery device, affecting the reliability of the battery device.

[0059] Based on the above considerations, in order to solve the problem of low reliability of battery devices, a battery device was designed after in-depth research, including: a shell, an electrode assembly, an electrical adapter, and a lower plastic. The shell has an end cap, on which electrode terminals are installed. The electrode assembly is located inside the shell, opposite to and spaced apart from the end cap. The electrical adapter is located inside the shell and between the electrode assembly and the end cap, connecting the electrode terminals and the electrode assembly. The lower plastic is located inside the shell, along the arrangement direction of the electrode assembly and the end cap, between the electrical adapter and the end cap, and abuts against the electrical adapter. The lower plastic is spaced apart from the electrode assembly, and its sidewall abuts against the shell.

[0060] In this type of battery device, by separating the lower plastic from the electrode assembly and having the sidewall of the lower plastic abut against the outer casing, the probability of electrode assembly deformation can be reduced, thereby lowering the risk of short circuits or self-discharge within the battery device and improving the reliability of the battery device.

[0061] The batteries disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. Any electrical device that can be connected to the battery device disclosed in this application is also an applicable electrical device for the battery device disclosed in this application, which helps to broaden the applicability of the battery device.

[0062] For ease of explanation, the following embodiments use a vehicle as an example of an electrical device 100 according to some embodiments of this application.

[0063] like Figure 1 As shown, Figure 1This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle can be a new energy vehicle, such as a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle. A battery device 110 can be installed inside the vehicle, and the battery device 110 can be located at the bottom, front, or rear of the vehicle. The battery device 110 can be used to supply power to the vehicle; for example, the battery device 110 can serve as the vehicle's operating power source or its main power source. The vehicle may also include a controller 120 and a motor 130. The controller 120 controls the battery device 110 to supply power to the motor 130. The battery device 110 is used to meet the power needs of the vehicle during starting, navigation, and driving. The battery device 110 is connected to the vehicle to realize its application within the vehicle.

[0064] like Figure 2 As shown, Figure 2 The diagram below shows a battery device 110 provided in some embodiments of this application. The battery device 110 includes a housing 10, an electrode assembly 20, an electrical adapter 30, and a lower plastic 40. The electrode assembly 20, the electrical adapter 30, and the lower plastic 40 are installed inside the housing 10. The housing 10 can be of various shapes, such as a cylinder, a cuboid, etc.

[0065] According to some embodiments of this application, such as Figures 2-7 As shown, the battery device 110 may include: a housing 10, an electrode assembly 20, an electrical adapter 30, and a lower plastic 40. The housing 10 has an end cap 11, on which electrode terminals 50 are mounted. The electrode assembly 20 is disposed inside the housing 10, and the electrode assembly 20 and the end cap 11 are opposite to and spaced apart. The electrical adapter 30 is disposed inside the housing 10 and located between the electrode assembly 20 and the end cap 11. The electrical adapter 30 connects the electrode terminals 50 and the electrode assembly 20. The lower plastic 40 is disposed inside the housing 10. Along the arrangement direction of the electrode assembly 20 and the end cap 11, the lower plastic 40 is located between the electrical adapter 30 and the end cap 11 and abuts against the electrical adapter 30. The lower plastic 40 is spaced apart from the electrode assembly 20, and the sidewall of the lower plastic 40 abuts against the housing 10.

[0066] The outer casing 10 has an end cap 11. When the battery device 110 is placed vertically, the end cap 11 can be located at at least one end of the outer casing 10 along the height direction of the battery device 110. Figure 2 When the orientation is set, the height direction of the battery device 110 is as follows: Figure 2In the Z direction. As an example, the housing 10 may include a housing sidewall 12 and two end caps 11. The housing sidewall 12 may have end caps 11 at both ends along the height direction of the battery device 110. The housing sidewall 12 can be assembled with the two end caps 11, and the housing sidewall 12 and the two end caps 11 together define an installation space. The electrode assembly 20, the electrical adapter 30, and the lower plastic 40 can all be installed in the installation space. The end caps 11 may be equipped with electrode terminals 50, which can be fixedly connected to the end caps 11 by snap-fit, welding, or other methods. The housing 10 also contains an electrode assembly 20, which can be arranged opposite to and spaced apart from the end caps 11 along the height direction of the battery device 110. The electrical adapter 30 is located inside the housing 10, between the electrode assembly 20 and the end caps 11. The electrical adapter 30 can electrically connect the electrode terminals 50 and the electrode assembly 20, and the electrode terminals 50 can be connected to the tabs of the electrode assembly 20 through the electrical adapter 30. The lower plastic 40 can be disposed inside the housing 10, along the arrangement direction of the electrode assembly 20 and the end cap 11 (i.e., the height direction of the battery device 110). The lower plastic 40 can be located between the electrical adapter 30 and the end cap 11, and can be located on the side of the electrical adapter 30 away from the electrode assembly 20. The lower plastic 40 can abut against the electrical adapter 30, and can limit the electrical adapter 30, thereby reducing the probability of the electrical adapter 30 moving along the arrangement direction of the electrode assembly 20 and the end cap 11. This is beneficial to improving the stability of the electrical adapter 30 assembled in the battery device 110, and thus improving the reliability of the battery device 110. As an example, the electrical adapter 30 may have a first positioning part 31, and the lower plastic 40 may have a second positioning part 44. The first positioning part 31 may be one of a positioning notch and a positioning post, and the second positioning part 44 may be the other of a positioning notch and a positioning post. The positioning post may be assembled with the positioning notch, and the positioning post may abut against the inner wall of the positioning notch for limiting, thereby enabling the electrical adapter 30 and the lower plastic 40 to be positioned quickly, making the assembly process simpler and improving the assembly efficiency of the battery device 110.

[0067] Along the arrangement direction of the electrode assembly 20 and the end cap 11, the lower plastic 40 can be spaced apart from the electrode assembly 20. This reduces the probability of deformation of the tabs, electrodes, and separators in the electrode assembly 20, and lowers the probability of internal short circuits or self-discharge in the battery device 110, thus improving the reliability of the electrode assembly 20 and the battery device 110. The sidewall of the lower plastic 40 can abut against the outer casing 10. When the battery device 110 is impacted, the lower plastic 40 can act as a buffer and protect it. The lower plastic 40 can fill the gap between the electrode terminals 50 and the outer casing 10, providing a sealing effect and reducing the probability of external moisture and air entering the battery device 110, thus extending the service life of the battery device 110.

[0068] In the above technical solution, by setting the lower plastic 40 to be spaced apart from the electrode assembly 20, and the sidewall of the lower plastic 40 to abut against the outer shell 10, the probability of deformation of the electrode assembly 20 can be reduced, the risk of short circuit or self-discharge of the battery device 110 can be reduced, and the reliability of the battery device 110 can be improved.

[0069] According to some embodiments of this application, such as Figures 3-6 As shown, the surface of the lower plastic 40 facing the electrode assembly 20 has a first boss 42 and a second boss 43. The first boss 42 is opposite to and abuts against the electrical adapter 30. The second boss 43 is adjacent to the circumferential edge of the lower plastic 40 and extends along the circumferential direction of the lower plastic 40. The second boss 43 is adjacent to the first boss 42. The outer circumferential surface of the second boss 43 is constructed as a guide slope to facilitate the assembly of the lower plastic 40 into the housing 10. The second boss 43 is opposite to and spaced apart from the electrode assembly 20.

[0070] The lower plastic 40 includes a lower plastic body 41, which can be constructed as a plate-like structure with a circular cross-section. Along the arrangement direction of the lower plastic 40 and the electrode assembly 20 (i.e., the height direction of the battery device 110), the surface of the lower plastic body 41 facing the electrode assembly 20 has a first protrusion 42 and a second protrusion 43. The lower plastic body 41 can be integrally formed with the first protrusion 42 and the second protrusion 43, which can protrude towards the electrode assembly 20. The first protrusion 42 can be positioned opposite and abut against the electrical adapter 30 along the height direction of the battery device 110, thus limiting the electrical adapter 30 and reducing the probability of it shifting along the height direction of the battery device 110. The second protrusion 43 can be adjacent to the circumferential edge of the lower plastic body 41 and can extend circumferentially along the lower plastic body 41. Along the radial direction of the lower plastic 40, the first boss 42 may be located inside the second boss 43, the second boss 43 may be adjacent to the first boss 42, and the second boss 43 and the first boss 42 may be constructed as an integral structure.

[0071] The outer peripheral surface of the second protrusion 43 can be constructed as a guide slope. From the lower plastic body 41 to the electrode assembly 20, the cross-sectional area of ​​the second protrusion 43 can gradually decrease, and the distance between the outer peripheral surface of the second protrusion 43 and the outer shell 10 can gradually increase. The guide slope can play a guiding role during assembly, enabling the lower plastic 40 to be accurately aligned with the assembly position on the outer shell 10, reducing assembly errors, facilitating the assembly of the lower plastic 40 into the outer shell 10, and reducing the probability of assembly difficulties or component damage caused by positional misalignment. When the lower plastic 40 is assembled into the outer shell 10, the second protrusion 43 and the electrode assembly 20 can be opposite each other and spaced apart along the height direction of the battery device 110. The separation between the second protrusion 43 and the electrode assembly 20 can reduce the probability of deformation of the electrode assembly 20, reduce the risk of short circuit or self-discharge inside the battery device 110, and improve the reliability of the battery device 110.

[0072] In the above technical solution, by setting the lower plastic 40 to have a first protrusion 42 and a second protrusion 43, the first protrusion 42 can be opposite to and abut against the electrical adapter 30, and the second protrusion 43 can be opposite to and spaced apart from the electrode assembly 20. While the lower plastic 40 limits the electrical adapter 30, the electrode assembly 20 can work normally, which can further improve the reliability of the electrode assembly 20 and is more conducive to improving the reliability of the battery device 110.

[0073] According to some embodiments of this application, such as Figure 6 and Figure 7 As shown, the protrusion height of the first boss 42 is equal to the protrusion height of the second boss 43.

[0074] The lower plastic part 40 can be located between the electrical adapter 30 and the end cap 11, and can be located on the side of the electrical adapter 30 away from the electrode assembly 20. The first boss 42 and the electrical adapter 30 are opposite and abut against each other, and the electrical adapter 30 is located between the first boss 42 and the electrode assembly 20, with the first boss 42 spaced apart from the electrode assembly 20. The protrusion height of the first boss 42 is equal to the protrusion height of the second boss 43, which is more conducive to the second boss 43 and the electrode assembly 20 being spaced apart, achieving a better protection effect for the electrode assembly 20, enabling the electrode assembly 20 to work normally, further reducing the risk of short circuit or self-discharge of the battery device 110 due to deformation of the electrode assembly 20, and further improving the reliability of the battery device 110. Furthermore, by setting the protrusion height of the first boss 42 to be equal to the protrusion height of the second boss 43, the production and processing of the lower plastic part 40 can be facilitated, which helps to reduce costs.

[0075] In the above technical solution, by setting the protrusion height of the first boss 42 to be equal to the protrusion height of the second boss 43, it is more conducive to setting the second boss 43 and the electrode assembly 20 separately, which can achieve better protection of the electrode assembly 20, enabling the electrode assembly 20 to work normally, further reducing the risk of short circuit or self-discharge of the battery device 110 due to deformation of the electrode assembly 20, which is more conducive to improving the reliability of the battery device 110, and also facilitates the production and processing of the lower plastic 40, which helps to reduce costs.

[0076] According to some embodiments of this application, the protrusion height of the second boss 43 is H1, and the width of the first boss 42 is D1 along the arrangement direction of the first boss 42 and the second boss 43, satisfying the relationship: 0.2≤H1 / D1≤0.6.

[0077] The unit of the protrusion height of the second boss 43 is the same as the unit of the width of the first boss 42. The unit of the protrusion height of the second boss 43 and the unit of the width of the first boss 42 can both be "mm". The second boss 43 protrudes towards the electrode assembly 20 along the arrangement direction of the lower plastic 40 and the electrode assembly 20. The protrusion height of the second boss 43 is H1. Along the arrangement direction of the first boss 42 and the second boss 43 (i.e., the radial direction of the lower plastic 40), the first boss 42 has a certain width dimension, which is D1, satisfying the relationship: 0.2D1≤H1≤0.6D1. For example, the protrusion height of the second boss 43 can be 0.2D1, 0.3D1, 0.5D1, 0.6D1, etc. The protrusion height of the second boss 43 can be within the range of 0.2D1 to 0.6D1, including any value including the endpoint value; any value is an optional protrusion height of the second boss 43 in this invention. If the protrusion height of the second boss 43 is less than 0.2D1, it may cause structural instability of the lower plastic 40 and may affect the insulation of the lower plastic 40. If the protrusion height of the second boss 43 is greater than 0.2D1, it may cause the second boss 43 to contact the electrode assembly 20, causing deformation of the electrode assembly 20, which may lead to an internal short circuit or self-discharge of the battery device 110. Therefore, the protrusion height of the second protrusion 43 is between 0.2D1 and 0.6D1, which not only stabilizes the structure of the lower plastic 40 and allows it to provide good insulation and protection, but also allows the second protrusion 43 to be spaced apart from the electrode assembly 20, thus protecting the electrode assembly 20 and ensuring its normal operation, which is more conducive to improving the reliability of the battery device 110.

[0078] In the above technical solution, by reasonably setting the protrusion height of the second protrusion 43 and the width of the first protrusion 42, the structure of the lower plastic 40 can be stabilized, the lower plastic 40 can play a good role in insulation and protection, and the second protrusion 43 can be spaced apart from the electrode assembly 20, which can achieve the effect of protecting the electrode assembly 20. The electrode assembly 20 can work normally, which is more conducive to improving the reliability of the battery device 110.

[0079] According to some embodiments of this application, the protrusion height of the first boss 42 is smaller than the protrusion height of the second boss 43.

[0080] The first boss 42 and the electrical adapter 30 are opposite and abut against each other. The electrical adapter 30 is located between the first boss 42 and the electrode assembly 20. The first boss 42 is spaced apart from the electrode assembly 20. The protrusion height of the first boss 42 can be smaller than the protrusion height of the second boss 43, that is, the distance between the first boss 42 and the electrode assembly 20 is smaller than the distance between the second boss 43 and the electrode assembly 20. The second boss 43 is spaced apart from the electrode assembly 20, that is, the protrusion height of the second boss 43 can be slightly larger than the protrusion height of the first boss 42. The outer peripheral surface of the second boss 43 is constructed as a guide slope. By setting the protrusion height of the second boss 43 to be greater than that of the first boss 42, the second boss 43 can preferentially contact the outer shell 10 when the lower plastic 40 and the outer shell 10 are assembled together. This increases the contact area between the second boss 43 and the outer shell 10, and the second boss 43 can play a good guiding role, thereby enabling the lower plastic 40 to be assembled into the outer shell 10 more smoothly.

[0081] In the above technical solution, by setting the protrusion height of the first boss 42 to be smaller than that of the second boss 43, the second boss 43 can play a better guiding role, so that the lower plastic 40 can be more smoothly assembled into the outer shell 10.

[0082] According to some embodiments of this application, the protrusion height of the second boss 43 is H1, and the protrusion height of the first boss 42 is H2, satisfying the relationship: 1 < H1 / H2 ≤ 1.2.

[0083] The unit of the protrusion height of the second boss 43 is the same as that of the first boss 42, and both units can be "mm". For example, the protrusion height of the second boss 43 can be 1.05H2, 1.08H2, 1.12H2, 1.2H2, etc. The protrusion height of the second boss 43 can be within the range of H2 to 1.2H2, and these are all optional protrusion height dimensions of the second boss 43 in this invention. That is, the protrusion height of the second boss 43 can be greater than that of the first boss 42. If the protrusion height of the second protrusion 43 is less than or equal to H2, it will lead to structural instability of the lower plastic 40, potentially affecting its insulation and guiding effect, and increasing assembly difficulty. If the protrusion height of the second protrusion 43 is greater than 1.2H2, it may become too large, potentially causing the second protrusion 43 to contact the electrode assembly 20, resulting in an internal short circuit or self-discharge of the battery device 110. Therefore, a protrusion height of the second protrusion 43 between H2 and 1.2H2 ensures structural stability of the lower plastic 40, providing good insulation and protection, while also allowing the second protrusion 43 to act as a guide, facilitating smooth assembly of the lower plastic 40 and the outer casing 10. Furthermore, the second protrusion 43 can be spaced apart from the electrode assembly 20, protecting it and ensuring its normal operation, thus improving the reliability of the battery device 110.

[0084] In the above technical solution, by reasonably setting the protrusion height of the second boss 43 and the protrusion height of the first boss 42, the structure of the lower plastic 40 can be stabilized, enabling the lower plastic 40 to play a good role in insulation and protection. The second boss 43 can also play a good guiding role, allowing the lower plastic 40 and the outer shell 10 to be assembled smoothly. Furthermore, the second boss 43 can be spaced apart from the electrode assembly 20, which can better protect the electrode assembly 20, allowing the electrode assembly 20 to work normally and further improving the reliability of the battery device 110.

[0085] According to some embodiments of this application, along the arrangement direction of the first boss 42 and the second boss 43, the width dimension of the second boss 43 is D2, and the protrusion height dimension of the first boss 42 is H2, satisfying the relationship: 0.3H2≤D2≤0.6H2.

[0086] In this design, the unit of the width dimension of the second protrusion 43 is the same as the unit of the protrusion height dimension of the first protrusion 42. Both the unit of the width dimension of the second protrusion 43 and the unit of the protrusion height dimension of the first protrusion 42 can be "mm". For example, the width dimension of the second protrusion 43 can be 0.3H2, 0.35H2, 0.4H2, 0.6H2, etc. The width dimension of the second protrusion 43 can be within the range of 0.3H2 to 0.6H2, including any value including the endpoint value. Any value is an optional width dimension of the second protrusion 43 in this invention. If the width dimension of the second protrusion 43 is less than 0.3H2, when the battery device 110 is compressed, the second protrusion 43 is prone to deformation, which may cause deformation of the electrode assembly 20, affecting the normal operation of the electrode assembly 20 and easily leading to a short circuit inside the battery device 110 or self-discharge of the battery device 110. If the width of the second protrusion 43 is greater than 0.6H2, the excessive width of the second protrusion 43 will increase the radial dimension of the lower plastic 40, which may cause the first protrusion 42 to abut against the center of the electrical adapter 30, affecting the effect of the first protrusion 42 in abutting and limiting the electrical adapter 30. Therefore, the width of the second protrusion 43 is between 0.3H2 and 0.6H2. When the battery device 110 is compressed, if the second protrusion 43 contacts the electrode assembly 20, the contact area between the second protrusion 43 and the electrode assembly 20 can be increased, which can reduce the probability of deformation of the electrode assembly 20, enhance the effect of the first protrusion 42 in abutting and limiting the electrical adapter 30, and further improve the reliability of the second protrusion 43.

[0087] In the above technical solution, by reasonably setting the protrusion height of the first boss 42 and the width of the second boss 43, the probability of deformation of the electrode assembly 20 can be reduced, the effect of the first boss 42 on the contact and limiting of the electrical adapter 30 can be enhanced, and the reliability of the second boss 43 can be further improved.

[0088] According to some embodiments of this application, such as Figure 6 and Figure 7 As shown, the first boss 42 is arc-shaped and extends circumferentially along the lower plastic 40.

[0089] The first protrusion 42 can be constructed in an arc shape and can extend circumferentially along the lower plastic 40. When the lower plastic 40 is subjected to pressure, it can reduce the risk of structural damage or deformation due to excessive local stress, thereby improving the structural stability of the lower plastic 40 and the battery device 110. Furthermore, by constructing the first protrusion 42 in an arc shape, the contact area between the first protrusion 42 and the electrical adapter 30 can be increased, thereby enhancing the limiting effect of the first protrusion 42 on the electrical adapter 30, improving the stability of the electrical adapter 30, and further improving the reliability of the battery device 110.

[0090] In the above technical solution, by constructing the first boss 42 as an arc shape, the structural stability of the lower plastic 40 and the battery device 110 can be improved, the stability of the electrical adapter 30 can be improved, and the reliability of the battery device 110 can be further improved.

[0091] According to some embodiments of this application, such as Figure 7 As shown, the second boss 43 is annular.

[0092] The second protrusion 43 is adjacent to the circumferential edge of the lower plastic body 41. The second protrusion 43 is annular and extends circumferentially along the lower plastic body 40. The first protrusion 42 and the second protrusion 43 are adjacent and their shapes are matched, which helps to improve the overall structural integrity of the lower plastic body 40. The annular second protrusion 43 can provide guidance for the assembly of the lower plastic body 40 along its circumference, so that the lower plastic body 40 and the outer shell 10 can be assembled smoothly, which helps to improve the structural stability of the battery device 110. In addition, the second protrusion 43 can better isolate the electrode assembly 20, electrical adapter 30 and other components from the outer shell 10, which can improve the insulation of the lower plastic body 40 and reduce the risk of internal short circuits in the battery device 110.

[0093] In the above technical solution, the second protrusion 43 is annular, which makes the shapes of the first protrusion 42 and the second protrusion 43 compatible. This is beneficial to improving the structural integrity of the lower plastic 40, allowing the lower plastic 40 to be smoothly assembled with the outer shell 10, which is beneficial to improving the structural stability of the battery device 110, and also improves the insulation of the lower plastic 40, which is beneficial to reducing the risk of internal short circuits in the battery device 110.

[0094] According to some embodiments of this application, such as Figure 6 and Figure 7 As shown, there are multiple first protrusions 42, which are arranged sequentially at intervals along the circumference of the lower plastic 40.

[0095] The device may have multiple first protrusions 42, which are arranged sequentially and at intervals along the circumference of the lower plastic 40. Each first protrusion 42 can be adjacent to a second protrusion 43, and the interval between any two adjacent first protrusions 42 can be equal. Multiple first protrusions 42 can more evenly bear the pressure on the lower plastic 40, reducing the risk of damage to internal components of the battery device 110 due to excessive local pressure. Multiple first protrusions 42 can provide multiple support points for the lower plastic 40 along its circumference, which helps reduce the probability of deformation, displacement, or detachment of the lower plastic 40 during long-term use, further improving the reliability of the battery device 110. Furthermore, by providing multiple first protrusions 42, which can all abut against the electrical adapter 30 along the circumference of the lower plastic 40, the effect of the first protrusions 42 in abutting and limiting the electrical adapter 30 can be further enhanced.

[0096] In the above technical solution, the multiple first protrusions 42 can more evenly bear the pressure borne by the lower plastic 40, reducing the risk of damage to the internal components of the battery device 110 due to excessive local pressure. This helps to reduce the probability of deformation, displacement or detachment of the lower plastic 40 during long-term use, and further improves the reliability of the battery device 110. In addition, the multiple first protrusions 42 can abut against the electrical adapter 30 along the circumference of the lower plastic 40, which can further enhance the effect of the first protrusions 42 in abutting and limiting the electrical adapter 30.

[0097] According to some embodiments of this application, such as Figure 2 As shown, the battery device 110 is cylindrical in shape.

[0098] The battery device 110 can be constructed as a cylinder, and the cross-section of the outer casing 10 can be constructed as a circle. The second protrusion 43 of the lower plastic 40 is constructed as an annular shape, the first protrusion 42 of the lower plastic 40 is constructed as an arc shape, and the cross-section of the lower plastic body 41 can be constructed as a circle. The sidewall of the lower plastic 40 abuts against the outer casing 10, thereby allowing the lower plastic 40 to fit tightly against the outer casing 10, which can improve the overall integrity of the battery device 110 and is beneficial to improving the sealing performance of the lower plastic 40.

[0099] The battery device 110 may have a housing 10, which may include a housing sidewall 12 and two end caps 11. The housing sidewall 12 may have end caps 11 at both ends along the height direction of the battery device 110, and the cross-section of the end caps 11 may be circular. The housing sidewall 12 may be constructed as a tubular structure and may be assembled with the two end caps 11. The battery device 110 may be symmetrically arranged about the midpoint along the height direction of the battery device 110. Electrode terminals 50 may be installed on both end caps 11 along the height direction of the battery device 110, and the electrode terminals 50 on the two end caps 11 may be respectively configured as the positive and negative terminals of the battery device 110. There may be two lower plastic parts 40 and two electrical adapters 30. Both lower plastic parts 40 may abut against the corresponding end caps 11. The first protrusions 42 of both lower plastic parts 40 may abut against the corresponding electrical adapters 30, and the second protrusions 43 of both lower plastic parts 40 may be spaced apart from the corresponding electrical adapters 30. Each electrical adapter 30 can be located between the electrode assembly 20 and the corresponding end cap 11, and each electrical adapter 30 can connect the corresponding electrode terminal 50 and the electrode assembly 20.

[0100] In the above technical solution, the lower plastic 40 can be tightly fitted with the outer shell 10, which can improve the overall integrity of the battery device 110 and improve the sealing performance of the lower plastic 40.

[0101] As an example, along the arrangement direction of the electrode assembly 20 and the housing sidewall 12, an insulating layer 60 can be provided between the electrode assembly 20 and the housing sidewall 12. The insulating layer 60 can be an insulating adhesive layer. The insulating layer 60 can separate the electrode assembly 20 from the housing sidewall 12, reducing the risk of the housing 10 becoming electrified due to contact between the electrode assembly 20 and the housing sidewall 12, which can further improve the reliability of the battery device 110 and enable the battery device 110 to operate normally. Along the height direction of the battery device 110, the upper end of the insulating layer 60 is set at a height higher than the surface of the second protrusion 43 facing the electrode assembly 20, thereby improving the reliability of the insulating layer 60, further reducing the risk of the housing 10 becoming electrified, and further improving the reliability of the battery device 110.

[0102] According to some embodiments of this application, this application also provides an electrical device 100, including a battery device 110 of any of the above schemes.

[0103] The power-consuming device 100 can be any of the aforementioned devices using the battery device 110. Using the battery device 110 in the above embodiments can improve the reliability of the power-consuming device 100.

[0104] According to some embodiments of this application, the battery device 110 includes a housing 10, an electrode assembly 20, an electrical adapter 30, and a lower plastic 40. The housing 10 has a housing sidewall 12 and two end caps 11, with electrode terminals 50 mounted on the end caps 11. The electrode assembly 20 is disposed within the housing 10, and the electrode assembly 20 and the end caps 11 are opposite to and spaced apart along the height direction of the battery device 110. The electrical adapter 30 is disposed within the housing 10, located between the electrode assembly 20 and the end caps 11, and connects the electrode terminals 50 and the electrode assembly 20. The lower plastic 40 is disposed inside the outer casing 10, along the arrangement direction of the electrode assembly 20 and the end cap 11. The lower plastic 40 is located between the electrical adapter 30 and the end cap 11. The lower plastic 40 has a first boss 42 and a second boss 43. The first boss 42 abuts against the electrical adapter 30, and the second boss 43 is spaced apart from the electrode assembly 20. The sidewall of the lower plastic 40 abuts against the outer casing 10. The outer peripheral surface of the second boss 43 is constructed as a guide slope. The protrusion height of the first boss 42 is equal to the protrusion height of the second boss 43. The protrusion height of the second boss 43 is half the width of the first boss 42, and the width of the second boss 43 is half the protrusion height of the first boss 42. The first protrusion 42 is arc-shaped and extends along the circumference of the lower plastic 40. There are multiple first protrusions 42, which are arranged sequentially at intervals along the circumference of the lower plastic 40. The second protrusion 43 is annular, and the battery device 110 is cylindrical.

[0105] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0106] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: The housing has an end cap on which electrode terminals are mounted; An electrode assembly is disposed within the housing, and the electrode assembly and the end cap are opposite to and spaced apart from each other. An electrical adapter is disposed within the housing and located between the electrode assembly and the end cap, the electrical adapter connecting the electrode terminal and the electrode assembly; The lower plastic is disposed inside the housing, along the arrangement direction of the electrode assembly and the end cap. The lower plastic is located between the electrical adapter and the end cap and abuts against the electrical adapter. The lower plastic is spaced apart from the electrode assembly, and the sidewall of the lower plastic abuts against the housing.

2. The battery device according to claim 1, characterized in that, The lower plastic surface facing the electrode assembly has a first boss and a second boss. The first boss is opposite to and abuts against the electrical adapter. The second boss is adjacent to the circumferential edge of the lower plastic and extends along the circumferential direction of the lower plastic. The second boss is adjacent to the first boss. The outer circumferential surface of the second boss is constructed as a guide slope to facilitate the assembly of the lower plastic into the housing. The second boss is opposite to and spaced apart from the electrode assembly.

3. The battery device according to claim 2, characterized in that, The protrusion height of the first boss is equal to the protrusion height of the second boss.

4. The battery device according to claim 2, characterized in that, The protrusion height of the second boss is H1, and the width of the first boss is D1 along the arrangement direction of the first boss and the second boss, satisfying the relationship: 0.2≤H1 / D1≤0.

6.

5. The battery device according to claim 2, characterized in that, The protrusion height of the first boss is smaller than that of the second boss.

6. The battery device according to claim 5, characterized in that, The protrusion height of the second boss is H1, and the protrusion height of the first boss is H2, satisfying the relationship: 1 < H1 / H2 ≤ 1.

2.

7. The battery device according to claim 2, characterized in that, Along the arrangement direction of the first boss and the second boss, the width dimension of the second boss is D2, and the protrusion height dimension of the first boss is H2, satisfying the relationship: 0.3H2≤D2≤0.6H2.

8. The battery device according to claim 2, characterized in that, The first boss is arc-shaped and extends circumferentially along the lower plastic.

9. The battery device according to any one of claims 2-8, characterized in that, The second boss is annular.

10. The battery device according to claim 9, characterized in that, There are multiple first protrusions, and the multiple first protrusions are arranged at intervals along the circumference of the lower plastic.

11. The battery device according to any one of claims 1-8, characterized in that, The battery device is cylindrical in shape.

12. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-11.

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