Battery cell, battery device and electric device

Abstract

The utility model relates to the field of batteries, and discloses a single battery, a battery device and a power utilization device, the single battery comprises a shell component, a battery cover component and a battery cover component, the shell component is provided with a mounting hole; an electrode member housed in the case member; the pole component is mounted at the mounting hole and is connected with the electrode component; the sealing structure is matched with the pole part to realize sealing of the shell part at the mounting hole; wherein the sealing structure is matched with the pole component in an inserting manner; and / or the sealing structure is matched with the shell part in an inserting manner. The battery monomer disclosed by the utility model can form good position fixation on the sealing structure, realizes positioning of the sealing structure, reduces the probability of displacement of the sealing structure, reduces the risk of sealing failure caused by displacement of the sealing structure, also can play a certain binding role on the sealing structure, reduces the risk of deformation of the sealing structure, and improves the reliability of the battery. Therefore, the risk of sealing failure caused by deformation of the sealing structure can be reduced, and the reliability of the single battery is improved.

Description

Technical Field

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

[0002] New energy vehicles have experienced rapid development in recent years. In the electric vehicle sector, batteries, as the power source, play an irreplaceable and important role. A battery consists of a housing and multiple cells housed within it. Within the cell structure, the terminal and the housing must be sealed during installation. However, the reliability of this seal affects the reliability of the cell. Improving the seal between the terminal and the housing has become a pressing issue. Utility Model Content

[0003] The embodiments of the present application provide a battery cell, a battery device, and an electrical device, which can effectively improve the reliability of the battery cell, the battery device, and the electrical device.

[0004] In a first aspect, an embodiment of the present application provides a battery cell, comprising: a shell component provided with a mounting hole; an electrode component housed in the shell component; a pole component installed at the mounting hole and connected to the electrode component; a sealing structure cooperating with the pole component to achieve sealing of the shell component at the mounting hole; wherein the sealing structure and the pole component are plug-fitted together; and / or the sealing structure and the shell component are plug-fitted together.

[0005] In the above technical solution, since the sealing structure and the pole component can be plugged together, and / or the sealing structure can be plugged together with the shell component, the sealing structure can be well fixed in position and positioned, thereby reducing the probability of displacement of the sealing structure during assembly of the mounting holes of the pole component and the shell component, and reducing the risk of seal failure due to displacement of the sealing structure. The above structure can also play a certain restraining role on the sealing structure, reducing the risk of deformation of the sealing structure, thereby reducing the risk of seal failure due to deformation of the sealing structure. In other words, a battery cell using the above structure can improve the reliability of the sealing structure, which in turn is conducive to improving the sealing reliability of the pole component and improving the reliability of the battery cell.

[0006] In some embodiments of the present application, the pole component includes a pole body and an adapter. The pole body is installed in the mounting hole through the adapter and is connected to the electrode component. The adapter and the sealing structure are plugged in and fit together, and the adapter and the sealing structure surround the pole body.

[0007] In the above technical solution, the adapter of the pole component can be used to connect the shell component, which is beneficial to improving the problem of stress deformation of the shell component during the installation of the pole component to the shell component, reducing the probability of deformation or damage of the shell wall, and thus improving the reliability of the battery cell. It can also reduce the wall thickness of the shell component without deformation or damage of the shell wall, reduce the weight of the battery cell, and improve the energy density of the battery cell. Moreover, the plug-in fit of the sealing structure and the adapter can simplify the structural complexity of the pole body and reduce the manufacturing difficulty and cost of the pole component while satisfying the plug-in fit of the sealing structure and the pole component. The adapter can also provide rigid support for the sealing structure, reduce the probability of deformation of the sealing component during the fit with the pole body, and help improve the sealing reliability of the pole component and the reliability of the battery cell.

[0008] In some embodiments of the present application, one of the sealing structure and the adapter is provided with a groove, and the other is provided with a protrusion, which is disposed within the groove. In this technical solution, the sealing structure and the adapter are easily plugged into each other through the groove and the protrusion. This structure is relatively simple, can reduce manufacturing difficulty, and thus reduce costs.

[0009] In some embodiments of the present application, the sealing structure includes a first sealing portion and a second sealing portion connected to each other, the first sealing portion is arranged on the inner side of the adapter close to the pole body, and the second sealing portion is arranged on the outer side of the adapter away from the electrode component and extends toward the side away from the pole body.

[0010] In the above technical solution, by configuring the sealing structure as described above, the sealing contact surface between the sealing structure and the pole component can be increased, and specialized sealing can be performed on different parts of the pole body, thereby providing multi-faceted protection for the pole body. If a problem occurs with one of the first sealing portion and the second sealing portion, resulting in seal failure, the other can still provide a certain sealing effect, thereby reducing the probability of leakage, improving the sealing reliability of the sealing structure on the pole body, and thereby improving the reliability of the battery cell. Furthermore, configuring the sealing structure as described above is also advantageous in adapting to pole bodies with more complex structures, better adapting to the shape of the pole body, and reducing the probability of seal failure.

[0011] In some embodiments of the present application, the first sealing portion is provided with a groove or a protrusion.

[0012] In the above technical solution, since the terminal body is typically assembled into the mounting hole in a direction perpendicular to the shell wall, the provision of a groove or protrusion on the first sealing portion for plugging and mating with the terminal body simplifies the structure of the second sealing portion. This also reduces the impact of the groove or protrusion on the second sealing portion during compression of the second sealing portion against the shell wall by the terminal body, thereby facilitating a greater degree of compression of the second sealing portion and thereby enhancing the sealing properties of the second sealing portion, thereby achieving a better sealing effect. The above solution also reduces the protrusion height of the sealing structure relative to the shell wall while maintaining an appropriate degree of compression of the second sealing portion, thereby facilitating a reduction in the size of the battery cell and an increase in the volumetric energy density of the battery cell.

[0013] In some embodiments of the present application, the first sealing portion is provided with a groove, and the transition piece is provided with a protrusion.

[0014] In the above technical solution, since the first sealing portion is located on the inner side of the adapter, close to the pole body, and the space inside the pole body is limited, the adapter is provided with a protrusion. Specifically, the protrusion is provided on the inner side of the adapter, which facilitates the processing and manufacturing of the protrusion. The first sealing portion is provided with a groove, specifically, the groove is provided on the outer side of the first sealing portion. Since the outer side of the first sealing portion has a larger space, the processing and manufacturing of the groove is facilitated. It is understood that adopting this structure can reduce the processing difficulty of the groove and protrusion, and the groove and protrusion are also easier to assemble, thereby reducing costs.

[0015] In some embodiments of the present application, the protrusion includes a first part and a second part, the first part is connected to the adapter, and the second part is arranged on a side of the first part close to the pole body. In the circumferential direction of the adapter, the size of the second part is larger than the size of the first part.

[0016] In the above technical solution, by setting the protrusion into the above structure, a hook-shaped structure can be formed on the protrusion, which is not easy to separate after matching with the groove, thereby reducing the probability of loosening between the adapter and the first sealing part, improving the connection reliability between the adapter and the first sealing part, and further improving the overall sealing reliability of the sealing structure to the pole body, thereby improving the reliability of the battery cell.

[0017] In some embodiments of the present application, the ends of the second portion protrude relative to the ends of the first portion in the circumferential direction of the adapter. In this technical solution, the opposite ends of the protrusion can form a hook-shaped structure, thereby further improving the connection reliability between the protrusion and the groove, thereby further improving the sealing reliability of the sealing structure on the terminal body and improving the reliability of the battery cell.

[0018] In some embodiments of the present application, the thickness of the protrusion is less than the thickness of the adapter in the height direction of the pole body. In this technical solution, the first sealing portion and the pole body can always maintain a certain sealing contact surface in the height direction of the pole body, which helps to reduce the risk of leakage points between the protrusion and the groove, improve the sealing reliability of the first sealing portion to the pole body, and thus improve the sealing reliability of the entire sealing structure to the pole body, thereby improving the reliability of the battery cell. Adopting the above solution also helps to reduce the size and weight of the protrusion, reduce the weight of the pole component and the sealing structure, and thus reduce the weight of the battery cell, which helps to increase the volume energy density of the battery cell.

[0019] In some embodiments of the present application, the second sealing portion is provided with a groove or a protrusion.

[0020] In the above technical solution, since the second sealing portion is provided with a groove or a protrusion, the position where the adapter cooperates with the second sealing portion is on the outside, which allows for more space to be used to provide the protrusion or groove, thereby reducing the difficulty of processing the adapter and reducing costs. Moreover, whether the second sealing portion is provided with a groove or a protrusion, the groove and the protrusion are both located on the side of the adapter away from the shell component. Since the groove is prone to burrs during the manufacturing process, the above solution can reduce the risk of the burrs in the groove falling into the interior of the shell component, reduce the probability of the burrs piercing the insulating material inside the shell component, and cause the insulation performance between the positive and negative electrodes to deteriorate. It can also reduce the probability of the burrs and the electrolyte reacting chemically and affecting the chemical properties of the battery cell, and reduce the probability of the burrs piercing the separator and damaging the electrode components, thereby improving the reliability of the battery cell.

[0021] In some embodiments of the present application, the second sealing portion is provided with a protrusion, and the transition piece is provided with a groove.

[0022] In the above technical solution, since the second sealing portion plays a sealing role through compression deformation, the second sealing portion is provided with a protrusion, which will reduce the thickness of the second sealing portion compared to the groove provided on the second sealing portion, thereby weakening the sealing of the second sealing portion. The above solution can make the second sealing portion have a larger compression amount during the process of the pole body compressing the second sealing portion on the shell wall, thereby enabling the second sealing portion to have better sealing between the pole body and the shell wall, which is beneficial to improving the sealing of the battery cell and thus improving the reliability of the battery cell.

[0023] In some embodiments of the present application, the groove includes a first groove portion and a second groove portion that are connected to each other. The second groove portion is located on a side of the first groove portion away from the second sealing portion, and a width of the second groove portion is smaller than a width of the first groove portion.

[0024] In the above technical solution, by setting the groove into the above structure, the groove can form a stepped groove shape, which is not easy to separate after matching with the protrusion, thereby reducing the probability of loosening between the adapter and the second sealing part, improving the connection reliability between the adapter and the second sealing part, and then improving the overall sealing reliability of the sealing structure to the pole body, thereby improving the reliability of the battery cell.

[0025] In some embodiments of the present application, the grooves and protrusions are symmetrically arranged on at least two opposing sides of the adapter. In this embodiment, the adapter and at least two opposing sides of the sealing structure can be plugged together, which can better limit and secure the adapter and sealing structure, improve the reliability of the connection between the adapter and the sealing structure, and reduce the risk of seal failure due to an unreliable connection between the adapter and the sealing structure. This can further improve the sealing reliability of the sealing structure on the terminal component and improve the reliability of the battery cell.

[0026] In some embodiments of the present application, there are multiple grooves and protrusions, spaced apart along the circumference of the adapter. In this technical solution, by increasing the number of grooves and protrusions, more plug-in fitting structures can be provided along the circumference of the adapter and the sealing structure, thereby improving the connection reliability between the adapter and the sealing structure. The adapter can better restrain the sealing structure, further reducing the probability of deformation or displacement of the sealing structure, further improving the sealing reliability of the sealing structure, and improving the reliability of the battery cell.

[0027] In some embodiments of the present application, the sealing structure is injection molded on the adapter.

[0028] In the above technical solution, the sealing structure is injection molded on the adapter, which can form a seamless connection between the sealing structure and the adapter, effectively preventing the leakage of internal substances of the battery cell and the entry of external impurities, thereby improving the reliability of the seal. The above structure can also make the distribution of the sealing structure on the adapter more uniform, and can withstand pressure from all directions. This uniform force characteristic is conducive to improving the stability of the seal and reducing the problem of sealing failure caused by local uneven force. On the other hand, the above solution can also make the fixing of the sealing structure and the adapter more secure, and can reduce the installation steps, simplify the assembly steps, improve production efficiency, and also help to accurately control the size and shape of the sealing structure, so that the sealing structure and the adapter can be more perfectly matched, reduce installation problems caused by dimensional deviations, and help to improve production efficiency and product quality.

[0029] In some embodiments of the present application, the shell component includes a first wall, the first wall is provided with the mounting hole, the pole component includes a connecting component and a first insulating component, the pole body is connected to the electrode component, the connecting component is connected to the first wall, and is insulated and connected to the pole body through the first insulating component; wherein, the connecting component includes a vertical arm, the vertical arm extends in a direction away from the first wall, and along the thickness direction of the first wall, the projection of the vertical arm on the first wall at least partially overlaps with the projection of the pole body on the first wall.

[0030] In a second aspect, an embodiment of the present application provides a battery device, comprising: a battery cell as described in any of the above items.

[0031] In the above technical solution, since the sealing structure of the battery cell has high sealing reliability, the reliability of the battery cell can be improved, which is beneficial to improving the reliability of the battery device.

[0032] In a third aspect, an embodiment of the present application provides an electrical device, comprising: a battery cell as described in any one of the above items, or a battery device as described in the above items.

[0033] In the above technical solution, since the sealing structure of the battery cell has high sealing reliability, the battery cell can have high reliability. The battery device using the battery cell also has high reliability, thereby improving the reliability of the electrical device including the battery cell or the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0036] Figure 2 An exploded view of the structure of a battery device provided in some embodiments of the present application;

[0037] Figure 3 A schematic diagram of the internal structure of a battery cell provided in some embodiments of the present application;

[0038] Figure 4 for Figure 3 A partial enlarged schematic diagram of IV;

[0039] Figure 5 A schematic diagram of the plug-in cooperation between the sealing structure and the housing components provided in some embodiments of the present application;

[0040] Figure 6 Schematic diagram of the plug-in cooperation between the sealing structure, housing components, and pole components provided in some embodiments of the present application;

[0041] Figure 7 A schematic diagram of a three-dimensional structure of a sealing structure provided by some embodiments of the present application plugged into an adapter;

[0042] Figure 8 A schematic diagram of the structure of the sealing structure and the adapter plug-in provided in some embodiments of the present application;

[0043] Figure 9 Schematic diagram of an exploded view of a sealing structure and an adapter provided in some embodiments of the present application;

[0044] Figure 10 A schematic diagram of the three-dimensional structure of an adapter provided in some embodiments of the present application;

[0045] Figure 11 A schematic diagram of the structure of the sealing structure and the adapter plug-in provided in other embodiments of the present application;

[0046] Figure 12 A top view of an adapter provided in some other embodiments of the present application;

[0047] Figure 13 Cross-sectional views of adapters provided in other embodiments of the present application;

[0048] Figure 14 A schematic diagram of the structure of the sealing structure and the adapter provided in another embodiment of the present application;

[0049] Figure 15 A cross-sectional view of an adapter provided in yet another embodiment of the present application;

[0050] Figure 16 An exploded view of a battery cell provided in some embodiments of the present application;

[0051] Figure 17 Schematic diagram of the assembly of the pole component and the sealing structure provided in some embodiments of the present application;

[0052] Figure 18 This is a schematic diagram of the assembly of the pole component and the sealing structure provided in some embodiments of the present application after omitting the first insulating member.

[0053] icon:

[0054] 1000. Electrical devices;

[0055] 100. Battery device;

[0056] 10. Box body; 11. First box body; 12. Second box body;

[0057] 20. Battery cells;

[0058] 21. Housing member; 201. First wall; 201a. Mounting hole;

[0059] 22. Electrode components;

[0060] 23. Pole components;

[0061] 231, pole body; 233, adapter; 232, connecting component; 2321, vertical arm; 234, first insulating member; 2301, recess; 2302, protrusion;

[0062] 24. Sealing structure;

[0063] 241, first sealing portion; 242, second sealing portion;

[0064] 251, groove;

[0065] 2511, first groove portion; 2512, second groove portion;

[0066] 252, bulge;

[0067] 2521, Part 1; 2522, Part 2;

[0068] 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0069] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0070] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0071] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0072] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0073] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0074] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0075] The term "plurality" used in this application refers to two or more (including two).

[0076] In this application, battery cells may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0077] The battery apparatus referred to in the embodiments of this application may refer to a battery assembly comprising one or more battery cells for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or in parallel via a busbar. In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0078] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing multiple battery cells to form an independent module. As an example, the battery module may be formed by bundling multiple battery cells with a cable tie.

[0079] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more battery cell assemblies housed within the housing. For example, the battery cell assemblies may be battery modules, which may be housed within the housing by securing the battery modules within the housing. For example, the battery cell assembly may also be housed within the housing by directly securing multiple battery cells to the housing. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0080] A battery cell includes a housing, electrode components, and an electrolyte. The housing is used to hold the electrode components and the electrolyte. The electrode components are composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet consists of 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. The negative current collector uncoated with the negative active material layer protrudes from the negative current collector coated with the negative active material layer. The negative current collector uncoated with the negative active material layer serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure that high currents can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together.

[0081] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode component may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0082] New energy vehicles have experienced rapid growth in recent years. Batteries, as the power source of electric vehicles, play an irreplaceable and important role. A battery consists of a housing and multiple cells housed within it. As a core component of new energy vehicles, batteries have high safety and service life requirements. In the battery cell structure, the terminal and the outer casing must be sealed during installation. However, the reliability of this seal affects the reliability of the battery cell. Improving the seal between the terminal and the outer casing has become a pressing issue.

[0083] In a typical battery cell, the pole is installed in the mounting hole of the outer shell. A sealing ring is required between the pole and the mounting hole, and during installation, the pole is sealed by pressing the sealing ring against the outer shell. However, during the process of pressing the sealing ring against the pole, if the placement of the sealing ring is offset, or if the sealing ring is deformed before placement and not restored, the sealing ring will not seal in place, causing the seal to fail. Especially for larger poles, the sealing ring size required is also relatively large, and the sealing ring is more likely to be offset or mispositioned during placement, and is more likely to be deformed, thereby further increasing the risk of seal failure.

[0084] Based on the above considerations, in order to solve the problem that the sealing ring used to seal the pole and the shell is easily displaced or deformed, which may easily lead to sealing failure and thus affect the reliability of the battery cell, the applicant has designed a battery cell, including: a shell component, an electrode component, a pole component and a sealing structure, the shell component is provided with a mounting hole; the electrode component is accommodated in the shell component; the pole component is installed at the mounting hole and is connected to the electrode component; the sealing structure cooperates with the pole component to realize the sealing of the shell component at the mounting hole; wherein the sealing structure and the pole component are plug-fitted; and / or the sealing structure and the shell component are plug-fitted.

[0085] In a battery cell of this structure, since the sealing structure and the pole component can be plugged together, and / or the sealing structure can be plugged together with the shell component, the sealing structure can be well fixed in position and positioned. This can reduce the probability of displacement of the sealing structure during assembly of the mounting holes of the pole component and the shell component, and reduce the risk of seal failure due to seal displacement. The above structure can also play a certain restraining role on the sealing structure, reducing the risk of deformation of the sealing structure, thereby reducing the risk of seal failure due to deformation of the sealing structure. In other words, a battery cell using the above structure can improve the reliability of the sealing structure, which in turn is conducive to improving the sealing reliability of the pole component, thereby improving the reliability of the battery cell.

[0086] The battery device disclosed in the embodiments of the present application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery cells, battery devices, etc. disclosed in the present application can be used to form the electrical device.

[0087] The present invention provides an electrical device that uses a battery device as a power source. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0088] For the convenience of description, the following embodiments are described by taking an electric device 1000 according to an embodiment of the present application as a vehicle as an example.

[0089] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle, and the battery device 100 can be provided at the bottom, head or tail of the vehicle. The battery device 100 can be used to power the vehicle. For example, the battery device 100 can serve as an operating power source for the vehicle. The vehicle can also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle during driving.

[0090] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0091] Please refer to Figure 2 , Figure 2 An exploded view of the structure of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes a housing 10 and a plurality of battery cells 20, which are used to be accommodated in the housing 10. The housing 10 is used to provide an assembly space for the battery cells 20, and the housing 10 can adopt a variety of structures. In some embodiments, the housing 10 can include a first housing body 11 and a second housing body 12, the first housing body 11 and the second housing body 12 covering each other, and the first housing body 11 and the second housing body 12 jointly define an assembly space for accommodating the battery cells 20. The second housing body 12 can be a hollow structure with one end open, and the first housing body 11 can be a plate-shaped structure, and the first housing body 11 covers the open side of the second housing body 12, so that the first housing body 11 and the second housing body 12 jointly define an assembly space; the first housing body 11 and the second housing body 12 can also be hollow structures with one side open, and the open side of the first housing body 11 covers the open side of the second housing body 12. Of course, the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0092] In the battery device 100, the multiple battery cells 20 can be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can be constructed by first connecting the multiple battery cells 20 in series, in parallel, or in a hybrid configuration to form a battery module. The multiple battery modules are then connected in series, in parallel, or in a hybrid configuration to form a single structure, which is then housed within the housing 10. The battery device 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 20.

[0093] Please refer to Figure 3 , Figure 3 This is a partial structural diagram of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes multiple rows of battery cells 20, which are arranged along the length of the housing 10, with each row of battery cells 20 including multiple battery cells 20 arranged along the width of the housing 10; alternatively, the multiple rows of battery cells 20 are arranged along the width of the housing 10, with each row of battery cells 20 including multiple battery cells 20 arranged along the length of the housing 10.

[0094] Each battery cell 20 can be a secondary battery or a primary battery, wherein a secondary battery refers to a battery cell 20 that can be activated by charging the active material after the battery cell is discharged and can continue to be used; it can also be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which is not limited in the embodiments of the present application. The battery cell 20 can be cylindrical, flat, rectangular or other shapes. For example, in Figure 3 In FIG, the battery cell 20 is in the shape of a rectangular parallelepiped.

[0095] According to some embodiments of the present application, referring to Figure 3 and Figure 4 The embodiment of the present application provides a battery cell 20 , including: a shell component 21 , an electrode component 22 , a pole component 23 and a sealing structure 24 .

[0096] The housing 21 has a mounting hole 201a. The electrode assembly 22 is housed within the housing 21. The pole assembly 23 is mounted within the mounting hole 201a and connected to the electrode assembly 22. A sealing structure 24 cooperates with the pole assembly 23 to seal the housing 21 at the mounting hole 201a. The sealing structure 24 and the pole assembly 23 are pluggable and mating, and / or the sealing structure 24 and the housing 21 are pluggable and mating.

[0097] The shell component 21 may refer to a shell structure for wrapping and protecting the chemical materials and components inside the battery. The shape of the shell component 21 may be, but is not limited to, a cuboid, a cube, a cylinder, etc. For example, referring to Figure 3 and Figure 16 The housing component 21 is in the shape of a rectangular parallelepiped. The mounting hole 201a may refer to a hole provided on the housing component 21, including but not limited to a hole provided in the first direction X, the second direction Y, or the third direction Z of the housing component 21, and is used to install the pole component 23.

[0098] The electrode component 22 may be composed of a positive electrode sheet, a negative electrode sheet and a separator, and the details may refer to the above description.

[0099] The terminal component 23 may be a component primarily made of a highly conductive metal material. It is a key component connecting the internal battery cell 20 to the external circuit, responsible for conducting the current generated within the battery cell 20 to the external circuit, or for introducing current from an external power source into the battery cell 20 during charging. By way of example, there may be one or more terminal components 23. When there is one terminal component 23, the terminal component 23 is a negative terminal. When there are multiple terminal components 23, some of the multiple terminal components 23 may be positive terminals, and the rest may be negative terminals, or all of the multiple terminal components 23 may be negative terminals.

[0100] The sealing structure 24 may be a structure or component that seals between the pole component 23 and the mounting hole 201a. The sealing structure 24 may be a component disposed circumferentially around the pole component 23. For example, the sealing structure 24 may be a sealing ring. In the present application, the material of the sealing structure 24 may include, but is not limited to, rubber, plastic, or other elastic materials. Rubber materials may include, but are not limited to, fluororubber, silicone rubber, nitrile rubber, and the like, and plastic materials may include, but are not limited to, polytetrafluoroethylene, polyethylene, and the like.

[0101] In the above exemplary embodiment of the present application, the sealing structure 24 can be plugged into and matched with the pole component 23 (see Figure 4 Alternatively, the sealing structure 24 may be plug-fitted with the housing component 21 (see Figure 5 Alternatively, the sealing structure 24 can also be plugged into and matched with the pole component 23 and the housing component 21 at the same time (see Figure 6 ).

[0102] In the above technical solution, since the sealing structure 24 and the pole component 23 can be plugged in and matched, and / or the sealing structure 24 can be plugged in and matched with the shell component 21, the sealing structure 24 can be well fixed in position and positioned. This can reduce the probability of displacement of the sealing structure 24 during assembly of the pole component 23 and the mounting hole 201a of the shell component 21, and reduce the risk of seal failure due to displacement of the sealing structure 24. The above structure can also play a certain restraining role on the sealing structure 24, reducing the risk of deformation of the sealing structure 24, thereby reducing the risk of seal failure due to deformation of the sealing structure 24. In other words, the battery cell 20 using the above structure can improve the reliability of the sealing structure 24, which in turn is conducive to improving the sealing reliability of the pole component 23 and improving the reliability of the battery cell 20.

[0103] In some embodiments of the present application, reference is made to Figure 4 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 11 、 Figure 14 and Figure 16 The pole component 23 includes a pole body 231 and an adapter 233. The pole body 231 is installed in the mounting hole 201a through the adapter 233 and is connected to the electrode component 22. The adapter 233 and the sealing structure 24 are plugged together, and the adapter 233 and the sealing structure 24 surround the pole body 231.

[0104] The pole body 231 may be a component made of a metal material with good electrical conductivity. The material of the pole body 231 may be, but is not limited to, aluminum, copper, silver, or gold.

[0105] The adapter 233 may refer to a component in the pole component 23 that is installed in the mounting hole 201a and connected to the housing component 21. The adapter 233 may be, but is not limited to, a plate-shaped component or a block-shaped component. For example, referring to Figures 9 to 15 The adapter 233 may be an adapter plate. The adapter 233 may also be made of, but not limited to, metal or composite materials. Metal materials may include, but are not limited to, aluminum, copper, and steel. The adapter 233 and the housing component 21 may be connected by, but not limited to, welding, riveting, or clamping.

[0106] “The adapter 233 and the sealing structure 24 surround the pole body 231 ” can be understood as the adapter 233 and the sealing structure 24 being annular components. For example, the adapter 233 is an adapter plate with a hole in the middle, and the sealing structure 24 is a sealing ring.

[0107] In conventional pole component structures, the pole body needs to be pressed against a sealing component placed on the shell component to achieve sealing of the shell component. However, in this sealing method, in order to ensure the preload required for sealing, the pole component applies a relatively high pressure to the shell component. When the shell component is thin, it is easy to cause deformation or damage to the shell wall. In the solution of the present application, by configuring the pole component 23 into the above-mentioned structure, when the pole component 23 is installed in the mounting hole 201a, the preload required to meet the compression amount of the sealing structure 24 can act on the adapter 233, thereby reducing the stress on the shell component 21. This can improve the problem of stress deformation of the shell component 21 and reduce the probability of deformation or damage to the shell wall. This can improve the reliability of the shell component 21 and further improve the reliability of the battery cell 20.

[0108] Because adapter 233 surrounds pole body 231, it is larger than pole body 231. By plugging adapter 233 into sealing structure 24, adapter 233 provides a larger installation space, facilitating the installation and securing of sealing structure 24, thereby improving assembly accuracy and efficiency. Furthermore, this solution eliminates the need for sealing structure 24 to connect to pole body 231, simplifying the structural complexity of pole body 231. As a key component of pole assembly 23, this approach simplifies the manufacturing process for pole body 231, increases manufacturing difficulty, and improves product yield, thereby reducing costs.

[0109] The adapter 233 is typically a rigid component made of a material such as metal. By plugging and fitting the sealing structure 24 with the adapter 233, the sealing structure 24 can be assembled onto the pole body 231 together with the adapter 233. This, on the one hand, improves the positional accuracy of the sealing structure 24 during the mating process with the pole body 231, reduces the probability of seal failure due to displacement of the sealing structure 24, and helps improve the sealing reliability. On the other hand, the adapter 233 also provides rigid support for the sealing structure 24, improves the problem of deformation of the sealing structure 24, thereby reducing the probability of seal failure due to deformation of the sealing structure 24, and further improves the sealing reliability. In other words, the plugging and fitting of the sealing structure 24 with the adapter 233 helps improve the sealing reliability of the sealing structure 24 on the pole component 23.

[0110] In the above-described technical solution, the adapter 233 of the terminal component 23 can be used to connect to the housing component 21. This helps alleviate the problem of stress deformation of the housing component 21 during the installation of the terminal component 23 to the housing component 21, reduces the probability of deformation or damage to the housing wall, and thus improves the reliability of the battery cell 20. It can also reduce the wall thickness of the housing component 21 without causing deformation or damage to the housing wall, reducing the weight of the battery cell 20 and increasing the energy density of the battery cell 20. Moreover, the plug-in fit between the sealing structure 24 and the adapter 233 can simplify the structural complexity of the terminal body 231 while ensuring the plug-in fit between the sealing structure 24 and the terminal component 23, reducing the manufacturing difficulty and cost of the terminal component 23. The adapter 233 also provides rigid support for the sealing structure 24, reducing the probability of deformation of the sealing structure 24 during the mating process with the terminal body 231, thereby improving the sealing reliability of the terminal component 23 and the reliability of the battery cell 20.

[0111] In some embodiments of the present application, reference is made to Figure 4 、 Figures 7 to 15 One of the sealing structure 24 and the adapter 233 is provided with a groove 251 , and the other is provided with a protrusion 252 , and the protrusion 252 is provided in the groove 251 .

[0112] The groove 251 may refer to a concave area with a certain shape and size. The protrusion 252 may refer to a protruding structure with a certain shape. In the embodiment of the present application, the shapes and sizes of the groove 251 and the protrusion 252 are adapted to each other. The shapes of the groove 251 and the protrusion 252 may be, but are not limited to, a rectangular parallelepiped, a cylindrical shape, a stepped shape, etc. For example, referring to Figure 9 and Figure 10 , the shape of the groove 251 and the protrusion 252 is a rectangular parallelepiped. Figures 11 to 15 , the groove 251 and the protrusion 252 are in the shape of a cylinder.

[0113] In the example scenario above, refer to Figure 4 、 Figures 7 to 10 , the sealing structure 24 is provided with a groove 251, and the adapter 233 is provided with a protrusion 252. Alternatively, refer to Figures 11 to 15 The sealing structure 24 is provided with a protrusion 252 , and the adapter 233 is provided with a groove 251 .

[0114] In the above technical solution, the sealing structure 24 and the adapter 233 are easily plugged in and matched with each other through the groove 251 and the protrusion 252. The use of this structure is relatively simple, which can reduce the manufacturing difficulty and thus reduce the cost.

[0115] In some embodiments of the present application, reference is made to Figure 8 、 Figure 9 、 Figure 11 and Figure 14 The sealing structure 24 includes a first sealing portion 241 and a second sealing portion 242 connected to each other. The first sealing portion 241 is arranged on the inner side of the adapter 233 close to the pole body 231, and the second sealing portion 242 is arranged on the outer side of the adapter 233 away from the electrode component 22 and extends to the side away from the pole body 231.

[0116] The first sealing portion 241 may be the inner portion of the sealing structure 24, and the second sealing portion 242 may be the outer portion of the sealing structure 24. The first sealing portion 241 and the second sealing portion 242 may be made of the same or different materials.

[0117] Reference Figure 4 The first sealing portion 241 can seal the end of the pole body 231 in the first direction X, and the second sealing portion 242 can seal the end of the pole body 231 in the third direction Z. By setting the sealing structure 24 to this structure, the sealing contact surface between the sealing structure 24 and the pole body 231 can be increased, thereby improving the sealing reliability.

[0118] In the above technical solution, by configuring the sealing structure 24 as described above, the sealing contact surface between the sealing structure 24 and the pole component 23 can be increased, and specialized sealing can be performed on different parts of the pole body 231, thereby providing multi-faceted protection for the pole body 231. If a problem occurs with one of the first sealing portion 241 and the second sealing portion 242, resulting in seal failure, the other can still provide a certain sealing effect, thereby reducing the probability of leakage, improving the sealing reliability of the sealing structure 24 on the pole body 231, and thereby improving the reliability of the battery cell 20. Furthermore, configuring the sealing structure 24 as described above is also advantageous in adapting to the more complex structure of the pole body 231, better adapting to the shape of the pole body 231, and reducing the probability of seal failure.

[0119] In some embodiments of the present application, reference is made to Figure 4 、 Figures 8 to 10, the first sealing portion 241 is provided with a groove 251 or a protrusion 252 .

[0120] The first sealing portion 241 may be provided with a groove 251 (see Figure 4 、 Figures 8 to 10 ), the adapter 233 is provided with a protrusion 252; or, the first sealing portion 241 is provided with a protrusion 252, and the adapter 233 is provided with a groove 251.

[0121] In the above technical solution, since the pole body 231 is typically assembled into the mounting hole 201a in a direction perpendicular to the shell wall, the provision of a groove 251 or a protrusion 252 on the first sealing portion 241 for plugging and mating with the pole body 231 can simplify the structure of the second sealing portion 242. Furthermore, during the process of the pole body 231 compressing the second sealing portion 242 against the shell wall, the impact of the groove 251 or the protrusion 252 on the second sealing portion 242 can be reduced, thereby facilitating a greater compression of the second sealing portion 242 and thereby enhancing the sealing performance of the second sealing portion 242, thereby achieving a better sealing effect. The above solution can also reduce the protrusion height of the sealing structure 24 relative to the shell wall while maintaining an appropriate compression of the second sealing portion 242, thereby facilitating a reduction in the size of the battery cell 20 and an increase in the volumetric energy density of the battery cell 20.

[0122] In some embodiments of the present application, reference is made to Figure 4 、 Figures 8 to 10 The first sealing portion 241 is provided with a groove 251 , and the adapter 233 is provided with a protrusion 252 .

[0123] In the above technical solution, since the first sealing portion 241 is located on the inner side of the adapter 233 near the pole body 231, and the space inside the pole body 231 is limited, the adapter 233 is provided with a protrusion 252. In other words, the protrusion 252 is provided on the inner side of the adapter 233, which facilitates the processing and manufacturing of the protrusion 252. The first sealing portion 241 is provided with a groove 251. In other words, the groove 251 is provided on the outer side of the first sealing portion 241. Since the outer side of the first sealing portion 241 has a larger space, the processing and manufacturing of the groove 251 is facilitated. It can be understood that the above structure can reduce the processing difficulty of the groove 251 and the protrusion 252, and the groove 251 and the protrusion 252 are also easy to assemble, which can reduce costs.

[0124] In some embodiments of the present application, reference is made to Figure 9 and Figure 10 The protrusion 252 includes a first part 2521 and a second part 2522. The first part 2521 is connected to the adapter 233, and the second part 2522 is arranged on a side of the first part 2521 close to the pole body 231. In the circumferential direction of the adapter 233, the size of the second part 2522 is larger than the size of the first part 2521.

[0125] The first portion 2521 may refer to the portion of the protrusion 252 connected to the adapter 233 . The second portion 2522 may refer to the portion of the protrusion 252 away from the adapter 233 .

[0126] The “circumferential direction of the adapter 233” may refer to the circumferential direction of the adapter 233 parallel to the first direction X and the second direction Y. “In the circumferential direction of the adapter 233, the size of the second portion 2522 is larger than the size of the first portion 2521”, which can be understood as referring to Figure 9 and Figure 10 A step structure with a wide outside and a narrow inside can be formed between the second part 2522 and the first part 2521, which is similar to a hook-shaped structure. Since the shapes of the protrusion 252 and the groove 251 match each other, the same step groove is also formed in the groove 251. In this way, after the protrusion 252 and the groove 251 cooperate with each other, the protrusion 252 is not easy to separate from the groove 251 along the first direction X and the second direction Y.

[0127] In the above technical solution, by setting the protrusion 252 into the above structure, a hook-shaped structure can be formed on the protrusion 252, which is not easy to separate after cooperating with the groove 251, thereby reducing the probability of loosening between the adapter 233 and the first sealing part 241, improving the connection reliability between the adapter 233 and the first sealing part 241, and further improving the overall sealing reliability of the sealing structure 24 to the pole body 231, thereby improving the reliability of the battery cell 20.

[0128] In some embodiments of the present application, reference is made to Figure 9 and Figure 10 In the circumferential direction of the adapter 233 , the two ends of the second portion 2522 are protruded relative to the two ends of the first portion 2521 .

[0129] In the above technical solution, hook-shaped structures can be formed at both opposite ends of the protrusion 252, thereby further improving the connection reliability between the protrusion 252 and the groove 251, thereby further improving the sealing reliability of the sealing structure 24 on the pole body 231 and improving the reliability of the battery cell 20.

[0130] In some embodiments of the present application, reference is made to Figure 8 In the height direction of the pole body 231 , the thickness of the protrusion 252 is smaller than the thickness of the adapter 233 .

[0131] Reference Figure 8 , the height direction of the pole body 231 can refer to Figure 8 In the third direction Z, the thickness of the protrusion 252 may be referred to as H1, and the thickness of the adapter 233 may be referred to as H2. Figure 8 It can be seen that H1 is smaller than H2.

[0132] As an example, one end of the protrusion 252 in the height direction of the pole body 231 is flush with the end surface of the adapter 233; or, the other end of the protrusion 252 in the height direction of the pole body 231 is flush with the end surface of the adapter 233; or, both ends of the protrusion 252 in the height direction of the pole body 231 are not flush with the end surface of the adapter 233.

[0133] In the above technical solution, the first sealing portion 241 and the pole body 231 can always maintain a certain sealing contact surface along the height direction of the pole body 231, which helps reduce the risk of leakage points between the protrusion 252 and the groove 251, improves the sealing reliability of the first sealing portion 241 on the pole body 231, and thus improves the sealing reliability of the sealing structure 24 as a whole on the pole body 231, thereby improving the reliability of the battery cell 20. Adopting the above solution also helps to reduce the size and weight of the protrusion 252, reduce the weight of the pole component 23 and the sealing structure 24, and thus reduce the weight of the battery cell 20, which helps to increase the volumetric energy density of the battery cell 20.

[0134] In some embodiments of the present application, reference is made to Figures 11 to 15 , the second sealing portion 242 is provided with a groove 251 or a protrusion 252 .

[0135] The second sealing portion 242 may be provided with a groove 251 , and the adapter 233 may be provided with a protrusion 252 ; or the second sealing portion 242 may be provided with a protrusion 252 , and the adapter 233 may be provided with a groove 251 .

[0136] In the above technical solution, since the second sealing portion 242 is provided with a groove 251 or a protrusion 252, the adapter 233 mates with the second sealing portion 242 on the outside, leaving more space for the protrusion 252 or groove 251. This helps reduce the difficulty of manufacturing the adapter 233 and lowers costs. Furthermore, whether the second sealing portion 242 is provided with a groove 251 or a protrusion 252, both the groove 251 and the protrusion 252 are located on the side of the adapter 233 away from the housing component 21. Since the groove 251 is prone to burrs during the manufacturing process, the above solution can reduce the risk of burrs from the groove 251 falling into the interior of the housing component 21, reducing the chance of burrs piercing the insulating material inside the housing component 21 and causing a decrease in insulation performance between the positive and negative electrodes. It also reduces the chance of burrs chemically reacting with the electrolyte and affecting the chemical properties of the battery cell 20, and reduces the chance of burrs piercing the separator and damaging the electrode component 22, thereby improving the reliability of the battery cell 20.

[0137] In some embodiments of the present application, reference is made to Figures 11 to 15 The second sealing portion 242 is provided with a protrusion 252 , and the adapter 233 is provided with a groove 251 .

[0138] In the above technical solution, since the second sealing portion 242 plays a sealing role through compression deformation, the second sealing portion 242 is provided with a protrusion 252. Compared with the groove 251, the protrusion 252 provided on the second sealing portion 242 will reduce the thickness of the second sealing portion 242, thereby weakening the sealing of the second sealing portion 242. The above solution can make the second sealing portion 242 have a larger compression amount during the process of the pole body 231 compressing the second sealing portion 242 on the shell wall, thereby enabling the second sealing portion 242 to have better sealing between the pole body 231 and the shell wall, which is beneficial to improving the sealing of the battery cell 20 and thereby improving the reliability of the battery cell 20.

[0139] In some embodiments of the present application, reference is made to Figure 13 and Figure 15 The groove 251 includes a first groove portion 2511 and a second groove portion 2512 that are connected to each other. The second groove portion 2512 is located on a side of the first groove portion 2511 away from the second sealing portion 242 , and a width of the second groove portion 2512 is smaller than a width of the first groove portion 2511 .

[0140] Reference Figure 13 and Figure 15 "The second groove portion 2512 is provided on a side of the first groove portion 2511 away from the second sealing portion 242, and the width of the second groove portion 2512 is smaller than the width of the first groove portion 2511". It can be understood that the groove 251 is in the shape of a stepped groove that is wide inside and narrow outside. Correspondingly, the protrusion 252 that cooperates therewith is in a hook-shaped structure, so that after the protrusion 252 and the groove 251 cooperate with each other, the protrusion 252 is not easy to separate from the groove 251 along the first direction X and the second direction Y.

[0141] In the above technical solution, by setting the groove 251 into the above structure, the groove 251 can form a stepped groove shape, which is not easy to separate after cooperating with the protrusion 252, thereby reducing the probability of loosening between the adapter 233 and the second sealing part 242, improving the connection reliability of the adapter 233 and the second sealing part 242, and further improving the overall sealing reliability of the sealing structure 24 to the pole body 231, thereby improving the reliability of the battery cell 20.

[0142] Optionally, refer to Figure 13 The second groove portion 2512 may be tapered, and the width of the second groove portion 2512 gradually decreases as it approaches the first groove portion 2511. The tapered groove has a lower machining accuracy requirement, which can reduce machining difficulty and cost.

[0143] Optionally, refer to Figure 15Second groove 2512 can be spherical in shape. The spherical groove evenly distributes the force applied by protrusion 252 in all directions, reducing local stress concentration. Furthermore, the spherical groove and protrusion 252 form a larger contact area, providing stronger connection strength. Furthermore, the shape of the spherical groove also makes it easier to align and insert protrusion 252 during installation, improving installation efficiency and accuracy and helping to reduce installation errors.

[0144] In some embodiments of the present application, reference is made to Figure 9 、 Figure 10 、 Figure 12 The groove 251 and the protrusion 252 are symmetrically arranged on at least two opposite sides of the adapter 233 .

[0145] It can be understood that the groove 251 and the protrusion 252 can be arranged on opposite sides of the adapter 233 in the first direction X; or, the groove 251 and the protrusion 252 can be arranged on opposite sides of the adapter 233 in the second direction Y; or, the groove 251 and the protrusion 252 can be arranged on opposite sides of the adapter 233 in the first direction X and on opposite sides of the second direction Y.

[0146] In the above technical solution, at least two opposite sides of the adapter 233 and the sealing structure 24 can be plugged in and matched, which can better limit and fix the adapter 233 and the sealing structure 24, improve the combination reliability of the adapter 233 and the sealing structure 24, and reduce the risk of sealing failure due to unreliable connection between the adapter 233 and the sealing structure 24, thereby improving the sealing reliability of the sealing structure 24 to the pole component 23 and improving the reliability of the battery cell 20.

[0147] In some embodiments of the present application, reference is made to Figure 9 、 Figure 10 、 Figure 12 There are multiple grooves 251 and protrusions 252, and they are arranged at intervals along the circumference of the adapter 233.

[0148] In the above technical solution, by increasing the number of grooves 251 and protrusions 252, more plug-in fitting structures can be provided in the circumferential direction of the adapter 233 and the sealing structure 24, thereby improving the connection reliability of the adapter 233 and the sealing structure 24. The adapter 233 can better restrain the sealing structure 24, further reduce the probability of deformation or displacement of the sealing structure 24, further improve the sealing reliability of the sealing structure 24, and improve the reliability of the battery cell 20.

[0149] In some embodiments of the present application, the sealing structure 24 is injection molded on the adapter 233 .

[0150] In the above technical solution, the sealing structure 24 is injection molded on the adapter 233, which can form a seamless connection between the sealing structure 24 and the adapter 233, effectively preventing the leakage of internal substances of the battery cell 20 and the entry of external impurities, thereby improving the reliability of the seal. The above structure can also make the distribution of the sealing structure 24 on the adapter 233 more uniform, and can withstand pressure from all directions. This uniform force characteristic is conducive to improving the stability of the seal and reducing the problem of sealing failure caused by local uneven force. On the other hand, the above solution can also make the fixing of the sealing structure 24 and the adapter 233 more secure, and can reduce the installation steps, simplify the assembly steps, improve production efficiency, and is also conducive to accurately controlling the size and shape of the sealing structure 24, so that the sealing structure 24 and the adapter 233 can be more perfectly matched, reducing installation problems caused by dimensional deviations, and helping to improve production efficiency and product quality.

[0151] In some embodiments of the present application, reference is made to Figure 3 、 Figure 4 、 Figure 17 and Figure 18 The shell component 21 includes a first wall 201, which is provided with a mounting hole 201a. The pole component 23 includes a connecting component 232 and a first insulating component 234. The pole body 231 is connected to the electrode component 22, and the connecting component 232 is connected to the first wall 201, and is insulated and connected to the pole body 231 through the first insulating component 234; wherein, the connecting component 232 includes a vertical arm 2321, which extends in a direction away from the first wall 201. Along the thickness direction of the first wall 201, the projection of the vertical arm 2321 on the first wall 201 at least partially overlaps with the projection of the pole body 231 on the first wall 201.

[0152] The shell component 21 may include multiple shell walls, which communicate and enclose a shell structure. The first wall 201 may refer to one of the multiple shell walls, and may be, but not limited to, the top wall, bottom wall, front side wall, rear side wall, left side wall, or right side wall of the shell component 21. The number of shell walls varies depending on the shape of the shell component 21, wherein the shape of the shell component 21 may be, but not limited to, a cuboid, a cube, a cylinder, etc. For example, referring to Figure 3 and Figure 16 The shell component 21 is in the shape of a cuboid, and the first wall 201 is the top wall of the shell component 21 .

[0153] The connecting component 232 may be a component used to connect the pole body 231 and the adapter 233 .

[0154] The first insulating member 234 may be a member used to insulate the connection member 232 from the pole body 231. The first insulating member 234 may be made of, but is not limited to, rubber or plastic. Rubber may be, but is not limited to, silicone rubber, fluororubber, etc., and plastic may be, but is not limited to, polypropylene, polyethylene, etc. Since the housing 21 is typically made of metal, the connection member 232 is insulated and connected to the pole body 231 via the first insulating member 234. This reduces the risk of a short circuit between the pole body 231 and the first wall 201, thereby improving the reliability of the battery cell 20.

[0155] "The connection part 232 includes the vertical arm 2321" can be understood as the connection part 232 can only include the vertical arm 2321, or the connection part 232 can include other parts in addition to the vertical arm 2321. In this example, there is no specific limitation on the other parts of the connection part 232. The vertical arm 2321 can refer to a plate-like or block-like structural member standing upright relative to the first wall 201. The vertical arm 2321 can generally refer to an arm plate with a thickness less than its height, so that the vertical arm 2321 has greater strength and support. For example, the thickness direction of the vertical arm 2321 can refer to Figure 17 and Figure 18 The second direction Y, the height direction may refer to Figure 17 and Figure 18 The third direction Z.

[0156] “The vertical arm 2321 extends in a direction away from the first wall 201 ” can be understood as that the vertical arm 2321 and the first wall 201 can be set at an angle, and the angle can be greater than 0 degrees and less than 180 degrees, which is not limited here.

[0157] “Along the thickness direction of the first wall 201 ”, as an example, the thickness direction of the first wall 201 may refer to Figure 4 The third direction Z.

[0158] “The projection of the vertical arm 2321 on the first wall 201 at least partially overlaps with the projection of the pole body 231 on the first wall 201”, it can be understood that the projection of the vertical arm 2321 on the first wall 201 can partially overlap with the projection of the pole body 231 on the first wall 201 (refer to Figure 18), or the projection of the vertical arm 2321 on the first wall 201 completely overlaps with the projection of the pole body 231 on the first wall 201. Regardless of whether the projection of the vertical arm 2321 partially or completely overlaps with the projection of the pole body 231, the vertical arm 2321 can limit the pole body 231 in the thickness direction of the first wall 201. When the pole body 231 is subjected to a force along the thickness direction of the first wall 201, the vertical arm 2321 can stop the pole body 231 through the first insulating member 234, thereby limiting the displacement of the pole body 231.

[0159] Because the vertical arm 2321 is similar to a vertical plate and is narrower than its height, it provides greater strength and support in the thickness direction of the first wall 201. When the pole body 231 is subjected to a force directed away from the first wall 201, the vertical arm 2321 can provide stronger support and restraint for the pole body 231. Furthermore, because the vertical arm 2321 is less likely to deform, it also provides a more stable and reliable support and restraint for the pole body 231. In other words, by employing the vertical arm 2321 structured as described above, the overall structural strength of the pole assembly 23 can be increased, thereby improving the reliability of the pole assembly 23.

[0160] Especially for thinner battery cells (the thickness of the battery cell can be referred to Figure 16 The dimension in the second direction Y), such as the blade battery, etc., due to the small thickness of the battery cell, the electrode components are usually arranged on the small surface of the shell component, which results in limited space for the pole component, and the size of the pole component is relatively small. Under the premise of ensuring that the welding surface of the pole and busbar and other components meets the requirements, it is difficult to improve the structural strength of the pole component. In the solution of the present application, the vertical arm 2321 and the pole body 231 adopt the above structure to reduce the thickness direction of the connecting component 232 in the battery cell 20 (refer to Figure 16 The dimension in the second direction (Y) of the electrode assembly 23 is advantageously used to provide greater strength to the electrode assembly 23 of thinner battery cells 20, reducing the probability of fracture of the electrode body 231 when subjected to external forces, thereby improving the reliability of the electrode assembly 23, and thereby improving the reliability of thinner battery cells 20. Furthermore, in thinner battery cells 20, the above-described structure, while ensuring that the structural strength of the electrode assembly 23 meets the requirements, also helps to increase the area of ​​the electrode body 231 on the side facing away from the first wall 201, thereby increasing the area of ​​the welded joint surface between the electrode body 231 and components such as the busbar, thereby improving the current carrying capacity of the electrode body 231.

[0161] Secondly, in the battery cell 20 of the above solution, since the size of the connecting component 232 in the thickness direction of the battery cell 20 can be relatively small, it is also beneficial to reduce the volume of the connecting component 232, thereby reducing the volume of the terminal component 23 and improving the volume energy density of the battery cell 20.

[0162] In the battery cell 20 of the above structure, since the projection of the vertical arm 2321 on the first wall 201 at least partially overlaps the projection of the terminal body 231 on the first wall 201 in the thickness direction of the first wall 201, the vertical arm 2321 can limit the terminal body 231. Moreover, since the vertical arm 2321 has high strength in the thickness direction of the first wall 201 and is not easily deformed, it can provide strong support and better limit the position. When the terminal body 231 is subjected to an external force in a direction away from the first wall 201, the vertical arm 2321 can press against the terminal body 231, thereby providing the terminal component 23 with a higher overall structural strength and reducing the possibility of the terminal body 231 being pulled out of the housing component 21. Secondly, the projection of the vertical arm 2321 on the first wall 201 at least partially overlaps with the projection of the terminal body 231 on the first wall 201, which can also reduce the probability of shaking, deformation, or displacement of the terminal body 231 and the connecting component 232 when they are mated, thereby improving the installation stability of the terminal body 231. In other words, the adoption of the above structure can improve the reliability of the terminal component 23, and thus improve the reliability of the battery cell 20.

[0163] In some embodiments of the present application, reference is made to Figure 17 and Figure 18 The vertical arm 2321 is arranged around the circumference of the pole body 231, and a recess 2301 is provided on the circumferential side of one of the vertical arm 2321 and the pole body 231, and a protrusion 2302 is provided on the circumferential side of the other of the vertical arm 2321 and the pole body 231, at least part of the protrusion 2302 extends into the recess 2301, and the two are insulated and matched by a first insulating member 234.

[0164] The phrase "the vertical arm 2321 is disposed circumferentially around the pole body 231" can be understood as meaning that the vertical arm 2321 is an annular arm plate, which facilitates providing a position-limiting function at multiple positions around the pole body 231, thereby enhancing the position-limiting effect of the vertical arm 2321 on the pole body 231. For example, the vertical arm 2321 is an annular component.

[0165] The recessed portion 2301 may be, but is not limited to, a groove, a through hole, etc. The protruding portion 2302 may refer to a structure protruding from the surface of the vertical arm 2321 or the pole body 231 . As an example, the protruding portion 2302 may be a protruding tooth.

[0166] A recess 2301 may be provided on the circumferential side of the vertical arm 2321, and the recess 2301 may be one or more. When there are multiple recesses 2301, the multiple recesses 2301 are spaced apart along the circumferential side of the vertical arm 2321. The pole body 231 may be provided with a protrusion 2302, and the protrusion 2302 may be one or more. When there are multiple protrusions 2302, the multiple protrusions 2302 are spaced apart along the circumferential side of the pole body 231.

[0167] The circumferential side of the vertical arm 2321 may also be provided with a protrusion 2302, and the protrusion 2302 may be one or more. When there are multiple protrusions 2302, the multiple protrusions 2302 are arranged at intervals along the circumferential side of the vertical arm 2321. The pole body 231 may be provided with a recess 2301, and the recess 2301 may be one or more. When there are multiple recesses 2301, the multiple recesses 2301 are arranged at intervals along the circumferential side of the pole body 231.

[0168] “At least a portion of the convex portion 2302 extends into the concave portion 2301 ” may mean that a portion of the convex portion 2302 extends into the concave portion 2301 , or the entire convex portion 2302 extends into the concave portion 2301 .

[0169] “The vertical arm 2321 and the pole body 231 are insulated and matched by the first insulating member 234” can be understood as follows: the first insulating member 234 is at least partially arranged between the vertical arm 2321 and the pole body 231 to insulate the vertical arm 2321 and the pole body 231 from each other. Accordingly, it can be understood that a gap is reserved between the protrusion 2302 and the recess 2301, and the first insulating member 234 is filled in the gap, thereby insulating the protrusion 2302 and the recess 2301.

[0170] In the above technical solution, the vertical arm 2321 and the terminal body 231 can be interlocked via the protrusion 2302 and the recess 2301, thereby increasing the overall structural strength of the vertical arm 2321 and the terminal body 231. When the terminal body 231 is subjected to an external force in a direction away from the first wall 201, the interlocking structure formed by the vertical arm 2321 and the terminal body 231 can better withstand the stress, thereby reducing the probability of deformation or damage, and further reducing the probability of the terminal body 231 being pulled away from the vertical arm 2321. The vertical arm 2321 and the terminal body 231 can also be mechanically locked by the protrusion 2302 and the recess 2301, thereby further strengthening the connection between the vertical arm 2321 and the terminal body 231. This helps the vertical arm 2321 and the terminal body 231 maintain a relatively stable positional relationship when the battery cell 20 is subjected to vibration, impact, or other external forces, and is less likely to loosen or move. It can be seen that the use of the vertical arm 2321 and the pole body 231 of the above structure can further improve the reliability and stability of the pole component 23 as a whole, and further improve the reliability of the battery cell 20.

[0171] Example 1

[0172] The battery cell 20 provided in the embodiment of the present application includes a shell component 21 , an electrode component 22 , a pole component 23 and a sealing structure 24 .

[0173] The housing member 21 is provided with a mounting hole 201 a . The electrode member 22 is accommodated in the housing member 21 .

[0174] The pole component 23 is mounted in the mounting hole 201a and includes a pole body 231, a connecting component 232, an adapter 233, and a first insulating component 234. The pole body 231 is connected to the electrode component 22. The connecting component 232, the adapter 233, and the first insulating component 234 are arranged around the circumference of the pole body 231. The adapter 233 is an adapter plate and is welded to the housing component 21. The connecting component 232 is a welding pressure ring and is welded to the adapter 233. The first insulating component 234 is an injection molded part and is injection molded between the connecting component 232 and the pole body 231 to insulate the connecting component 232 from the pole body 231.

[0175] The sealing structure 24 is a sealing ring that plugs into and mates with the adapter 233. The sealing structure 24 is an injection-molded part. During manufacturing, the adapter 233 can be placed in the production mold for the sealing ring, allowing the sealing structure 24 to be injection-molded onto the adapter 233, creating an integrated structure. The adapter 233 has multiple protrusions 252 on its inner ring, and multiple grooves 251 on its outer periphery. The multiple grooves 251 and the multiple protrusions 252 are arranged in a one-to-one correspondence and plug-fit together, forming an inlaid structure between the sealing structure 24 and the adapter 233. This prevents the sealing structure 24 from shifting or flipping during assembly with the pole body 231.

[0176] Example 2

[0177] An embodiment of the present application provides another battery cell 20. The structure of the battery cell 20 in this embodiment is substantially the same as that of the battery cell 20 in the first embodiment, except that: a plurality of grooves 251 are provided on the side of the adapter 233 facing away from the shell component 21. The plurality of grooves 251 are blind grooves and are arranged at intervals along the circumference of the adapter 233. A plurality of protrusions 252 are provided on the circumferential side of the sealing structure 24. The plurality of protrusions 252 and the plurality of grooves 251 are arranged in a one-to-one correspondence and are plugged together.

[0178] In a second aspect, an embodiment of the present application provides a battery device 100 , comprising: a battery cell 20 as described in any of the above items.

[0179] In the above technical solution, since the sealing structure 24 of the battery cell 20 has high sealing reliability, the reliability of the battery cell 20 can be improved, which is beneficial to improving the reliability of the battery device 100.

[0180] In a second aspect, an embodiment of the present application provides an electrical device 1000 , comprising: a battery cell 20 as described in any one of the above items, or a battery device 100 as described in the above items.

[0181] In the above technical solution, since the sealing structure 24 of the battery cell 20 has a high sealing reliability, the battery cell 20 can have a high reliability. The battery device 100 using the battery cell 20 also has a high reliability, thereby improving the reliability of the electrical device 1000 including the battery cell 20 or the battery device 100.

[0182] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0183] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution. Unless otherwise specified, all technical features and optional technical features of the present application can be combined with each other to form a new technical solution. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A battery cell, characterized in that: include: A housing component having a mounting hole; an electrode component housed in the housing component; A pole component is installed at the mounting hole and connected to the electrode component; a sealing structure, cooperating with the pole component to achieve sealing of the housing component at the mounting hole; The sealing structure and the pole component are plug-fitted together; and / or the sealing structure and the housing component are plug-fitted together.

2. The battery cell according to claim 1, wherein: The pole component includes a pole body and an adapter. The pole body is installed in the mounting hole through the adapter and is connected to the electrode component. The adapter and the sealing structure are plug-fitted and the adapter and the sealing structure surround the pole body.

3. The battery cell according to claim 2, characterized in that: One of the sealing structure and the adapter is provided with a groove, and the other is provided with a protrusion, and the protrusion is arranged in the groove.

4. The battery cell according to claim 3, characterized in that The sealing structure includes a first sealing portion and a second sealing portion connected to each other. The first sealing portion is arranged on the inner side of the adapter close to the pole body, and the second sealing portion is arranged on the outer side of the adapter away from the electrode component and extends to a side away from the pole body.

5. The battery cell according to claim 4, characterized in that The first sealing portion is provided with the groove or the protrusion.

6. The battery cell according to claim 5, characterized in that The first sealing portion is provided with the groove, and the adapter is provided with the protrusion.

7. The battery cell according to claim 6, characterized in that The protrusion includes a first part and a second part, the first part is connected to the adapter, and the second part is provided on a side of the first part close to the pole body. In the circumferential direction of the adapter, the size of the second part is larger than that of the first part.

8. The battery cell according to claim 7, characterized in that In the circumferential direction of the adapter, two ends of the second part are protruded relative to two ends of the first part.

9. The battery cell according to any one of claims 6 to 8, characterized in that: In the height direction of the pole body, the thickness of the protrusion is smaller than the thickness of the adapter.

10. The battery cell according to claim 4, characterized in that The second sealing portion is provided with the groove or the protrusion.

11. The battery cell according to claim 10, characterized in that The second sealing portion is provided with the protrusion, and the adapter is provided with the groove.

12. The battery cell according to claim 10, characterized in that The groove includes a first groove portion and a second groove portion that are connected to each other. The second groove portion is provided on a side of the first groove portion away from the second sealing portion, and a width of the second groove portion is smaller than a width of the first groove portion.

13. The battery cell according to any one of claims 3 to 12, characterized in that: The groove and the protrusion are symmetrically arranged on at least two opposite sides of the adapter.

14. The battery cell according to any one of claims 3 to 13, characterized in that: There are a plurality of grooves and protrusions, which are arranged at intervals along the circumference of the adapter.

15. The battery cell according to any one of claims 2 to 14, characterized in that: The sealing structure is injection-molded on the adapter.

16. The battery cell according to any one of claims 2 to 15, characterized in that: The shell component includes a first wall, the first wall is provided with the mounting hole, the pole component includes a connecting component and a first insulating component, the pole body is connected to the electrode component, the connecting component is connected to the first wall, and is insulated and connected to the pole body through the first insulating component; wherein the connecting component includes a vertical arm, the vertical arm extends in a direction away from the first wall, and along the thickness direction of the first wall, the projection of the vertical arm on the first wall at least partially overlaps with the projection of the pole body on the first wall.

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

18. An electrical device, characterized in that: include: The battery cell according to any one of claims 1 to 16, or the battery device according to claim 17.

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