Battery cell, battery device and electric device

Abstract

The utility model relates to the field of batteries, and discloses a battery monomer, a battery device and a power utilization device, the battery monomer comprises: a housing part, which comprises a first wall provided with a mounting hole; an electrode member housed in the case member; the pole component is mounted at the mounting hole and comprises a pole body, a connecting component and a first insulating part, the pole body is connected with the electrode component, and the connecting component is connected with the first wall and is in insulated connection fit with the pole body through the first insulating part; wherein the connecting component comprises a vertical arm, the vertical arm extends in the direction away from the first wall, and the projection of the vertical arm on the first wall at least partially overlaps the projection of the pole body on the first wall in the thickness direction of the first wall. The pole component disclosed by the utility model has relatively high structural strength, the probability of shaking, deformation or displacement when the pole body is matched with the connecting component is reduced, the mounting stability of the pole body is improved, the reliability of the pole component is improved, and the reliability of the single battery is further 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] In recent years, new energy vehicles have experienced rapid development. In the electric vehicle sector, batteries, as the power source of electric vehicles, play an irreplaceable and important role. A battery consists of a housing and multiple battery cells housed within it. As a core component of new energy vehicles, batteries have high safety and service life requirements. However, because the battery cell terminals need to be connected to adjacent battery cells or other electrical components, they are susceptible to external forces during operation, affecting the reliability of the terminals and, in turn, the reliability of the battery cells. Utility Model Content

[0003] The embodiments of the present application provide a battery cell, a battery device, and an electrical device, which can 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, comprising a first wall, the first wall being provided with a mounting hole; an electrode component, housed in the shell component; a pole component, mounted at the mounting hole, and comprising a pole body, a connecting component and a first insulating component, the pole body being connected to the electrode component, the connecting component being connected to the first wall, and being insulated and connected to the pole body through the first insulating component; wherein the connecting component comprises a vertical arm, the vertical arm extending 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.

[0005] In the battery cell of the above structure, because the projection of the vertical arm on the first wall at least partially overlaps with the projection of the terminal body on the first wall in the thickness direction of the first wall, the vertical arm can limit the terminal body. Moreover, because the vertical arm has high strength in the thickness direction of the first wall and is not easily deformed, it can provide strong support and better limit the position. When the terminal body is subjected to an external force in a direction away from the first wall, the vertical arm can press against the terminal body, giving the terminal component as a whole a high structural strength and reducing the probability of the terminal body being pulled out of the housing component. Secondly, the projection of the vertical arm on the first wall at least partially overlaps with the projection of the terminal body on the first wall, which can also reduce the probability of shaking, deformation, or displacement when the terminal body and the connecting component are mated, thereby improving the installation stability of the terminal body. In other words, the adoption of the above structure can improve the reliability of the terminal component, thereby improving the reliability of the battery cell.

[0006] In some embodiments of the present application, along the thickness direction of the first wall, the projection of the vertical arm on the first wall has a first inner contour and a first outer contour; along the thickness direction of the first wall, the projection of the pole body on the first wall has a second outer contour; at least part of the first inner contour is located within the second outer contour.

[0007] In the above technical solution, under the premise that the vertical arm can limit the position of the pole body, the positional relationship between the first inner contour of the vertical arm and the second outer contour of the pole body can be flexibly selected according to different needs, reducing the processing difficulty of the pole body and the vertical arm and improving the manufacturability of the pole component. On the other hand, the above solution can also improve the space utilization between the vertical arm and the pole body. When the first inner contour is partially located within the second outer contour, a more compact layout can be achieved in a limited space, fully utilizing the gaps between the various components and making the overall structure more compact. When the first inner contour is entirely located within the second outer contour, the space utilization can be further maximized, which is conducive to reducing the volume of the pole component, thereby reducing the volume of the battery cell and increasing the battery energy density.

[0008] In some embodiments of the present application, at least a portion of the second outer contour is located within the first outer contour.

[0009] In the above technical solution, the second outer contour of the pole body can be partially or entirely within the first outer contour of the vertical arm, thereby increasing the structural design flexibility of the vertical arm and the pole body. When the second outer contour is partially within the first outer contour, the relative position of the pole body and the vertical arm can be flexibly adjusted as needed to accommodate different spatial constraints and functional requirements, thus providing the possibility for diversified design of the pole component. When the second outer contour is entirely within the first outer contour, the position distribution of the pole body and the vertical arm can be made more compact, which is conducive to reducing the volume of the pole component and saving the installation space of the pole component, thereby reducing the volume of the battery cell and increasing the battery energy density.

[0010] In some embodiments of the present application, a portion of the first inner contour is located within the first outer contour, and the entire second outer contour is located within the first outer contour.

[0011] In the above technical solution, a portion of the first inner contour of the vertical arm is located within the first outer contour of the vertical arm, which can form a certain spatial level in the structure of the vertical arm itself. On the premise that the vertical arm can limit the pole body, it is beneficial to integrate the space between the vertical arm and the pole body, improve space utilization, make the vertical arm and the pole body more compact, and help further reduce the volume of the battery cell and improve the battery energy density.

[0012] The entire second outer contour of the pole body is located within the first outer contour of the vertical arm. On the one hand, this can make the overall appearance of the vertical arm relatively flat, and the pole body will not protrude from the outside of the vertical arm, which is conducive to making the overall pole component more regular, convenient for processing and manufacturing, and can also reduce the size of the pole component and improve the energy density of the battery. On the other hand, when the first insulating member covers the outside of the vertical arm, the above solution is also conducive to keeping the overall thickness of the first insulating member on the outside of the vertical arm consistent, which can reduce the problem of stress concentration in the first insulating member and help reduce electrical breakdown. It can be seen that the above technical solution is conducive to balanced control of the size, appearance, manufacturability and other performance of the pole component under the premise that the vertical arm can play a limiting role on the pole body.

[0013] In some embodiments of the present application, the vertical arm is arranged around the circumference of the pole body, a recess is provided on the circumferential side of one of the vertical arm and the pole body, and a protrusion is provided on the circumferential side of the other of the vertical arm and the pole body, at least part of the protrusion extends into the recess, and the two are insulated and matched by a first insulating member.

[0014] In the above technical solution, the vertical arm and the pole body can be interlocked with each other through the protrusion and recess, thereby increasing the overall structural strength of the vertical arm and the pole body. When the pole body is subjected to an external force in the direction away from the first wall, the interlocking structure formed by the vertical arm and the pole body can better withstand stress, which helps reduce the probability of deformation or damage, and further reduces the probability of the pole body being pulled away from the vertical arm. The vertical arm and the pole body can also be mechanically locked through the protrusion and recess, making the connection between the vertical arm and the pole body more secure. This helps the vertical arm and the pole body maintain a relatively stable positional relationship when the battery cell is subjected to vibration, impact or other external forces, and is less likely to loosen or shift. It can be seen that the vertical arm and the pole body with the above structure can further improve the reliability and stability of the pole component as a whole, and further improve the reliability of the battery cell.

[0015] In some embodiments of the present application, the connecting component and the first wall are integrally formed.

[0016] In the above technical solution, since the vertical arm of the connecting component is used to limit the position of the terminal body, by integrally forming the connecting component and the first wall of the housing component, there is no connection gap between the connecting component and the first wall. This can reduce the weak points between the connecting component and the first wall, making the overall structural strength of the connecting component and the housing component higher and more secure. When the battery cell is subjected to external impact, extrusion, or vibration, it can better withstand stress and reduce the risk of deformation or damage. This helps to improve the reliability of the vertical arm limiting the position of the terminal body, further improving the installation stability and reliability of the terminal body. Secondly, the connecting component and the first wall are integrally formed, with no gap between them, which can reduce potential leakage paths in the battery cell, improve the sealing of the battery cell, and further improve the reliability of the battery cell. Moreover, the integral formation of the connecting component and the first wall can reduce the number of assembly steps, reduce the complexity of the battery cell manufacturing process, improve production efficiency, reduce costs, and reduce the incidence of quality problems caused by poor connection between the connecting component and the housing component, which helps to improve the consistency and quality stability of the battery cell.

[0017] In some embodiments of the present application, the vertical arm is perpendicular to the first wall.

[0018] In the above technical solution, the vertical structure formed by the vertical arm and the first wall of the housing component enables the vertical arm to provide more stable support for the terminal body, which helps maintain the terminal body in a relatively stable position. It also better withstands the forces acting on the terminal body when the battery cell is subjected to external forces, thereby improving the reliability of the terminal component and further improving the reliability of the battery cell. Secondly, the structure of the vertical arm perpendicular to the first wall is relatively simple and easy to manufacture and process, which helps to improve the consistency and quality stability of the terminal component.

[0019] In some embodiments of the present application, the connecting component includes a horizontal arm, which surrounds the pole body and connects the vertical arm and the first wall, and the horizontal arm and the vertical arm are arranged at an angle.

[0020] In the above technical solution, the cross arm, using the connecting component structure described above, prevents the vertical arm from directly contacting the first wall. Specifically, the cross arm provides a location for connection to the first wall. Since the cross arm is primarily used for connection to the first wall and provides suitable operating space, the connection between the cross arm and the first wall is facilitated. Furthermore, the connecting component structure described above can reduce the impact of the connecting component on the vertical arm during connection to the first wall, reducing the likelihood of cracking or damage to the vertical arm, thereby improving the stability and reliability of the vertical arm and enhancing the reliability of the structure formed between the vertical arm and the pole body.

[0021] In some embodiments of the present application, the connecting component includes a horizontal arm and an adapter. The horizontal arm surrounds the pole body and connects the vertical arm. The horizontal arm and the vertical arm are arranged at an angle. The adapter surrounds the pole body and connects the horizontal arm and the first wall.

[0022] In the above technical solution, since the connecting component includes not only the vertical arm that limits the pole body, but also an adapter connected to the first wall, and a horizontal arm connecting the vertical arm and the adapter, the entire pole component can be assembled outside the shell component and then connected to the first wall through the adapter. There is no need to assemble the various parts of the pole component on the shell component. This can reduce the difficulty of assembling the pole component, facilitate the installation and coordination of the pole component and the shell component, and save installation time and cost.

[0023] Secondly, in conventional pole component structures, the pole body needs to be pressed against the sealing component placed on the first wall of the shell component to achieve the sealing of the shell component. However, in this sealing method, in order to ensure the pre-tightening force required for sealing, the pressure applied by the pole component to the first wall is relatively large. When the thickness of the shell component is relatively thin, it is easy to cause deformation or damage to the first wall. When the connecting component of the above structure of the present application is used, when the pole component is installed on the first wall, since the connecting component can be insulated and connected with the pole body through the first insulating component, the sealing requirements between the adapter and the first wall can be reduced, and there is no need to apply a large force to the pole component to meet the sealing requirements of the connection between the adapter and the first wall, thereby improving the problem of stress deformation of the first wall, which is conducive to reducing the wall thickness of the shell component, reducing the weight of the battery cell, and thus improving the battery energy density.

[0024] In some embodiments of this application, the horizontal arm is perpendicular to the vertical arm. In this technical solution, the vertical structure formed by the horizontal arm and the vertical arm can provide higher structural strength, better withstand the forces acting on the terminal body when the battery cell is subjected to external forces, improve the reliability of the terminal component, and further improve the reliability of the battery cell. The structure of the horizontal arm perpendicular to the vertical arm is also relatively simple, easy to manufacture and process, and conducive to improving the consistency and quality stability of the terminal component.

[0025] In some embodiments of the present application, the pole body is provided with a convex portion, the vertical arm is provided with a concave portion, the concave portion passes through the vertical arm toward the electrode component, and an opening is formed on one side of the vertical arm close to the electrode component.

[0026] In the above technical solution, since the protrusion of the pole body must be assembled with the recess of the vertical arm, the recess is formed through the vertical arm toward the electrode component and has an opening. The protrusion can enter the recess through the opening below the vertical arm, facilitating the mating of the pole body and the vertical arm. This can reduce the difficulty of installing the pole body and the vertical arm, improve assembly efficiency, and reduce costs. The recess penetrating the vertical arm toward the electrode component also reduces the weight of the vertical arm, thereby reducing the weight of the pole component, and thus reducing the weight of the battery cell, thereby increasing the battery energy density.

[0027] In some embodiments of the present application, the connecting component includes a horizontal arm, which is connected to the vertical arm and is provided with an avoidance groove, which is connected to the recess.

[0028] In the above technical solution, during the installation of the pole body through the mating of the protrusion and the recess of the vertical arm, the avoidance groove can provide lateral movement space for the protrusion of the pole body. In other words, it provides redundant space parallel to the first wall when the pole body and the horizontal arm are installed, providing a certain degree of error tolerance for the mating of the protrusion and the recess, which helps to reduce the installation difficulty of the pole body and the vertical arm, save installation time, and improve assembly efficiency. In addition, the avoidance groove can reduce the weight of the horizontal arm, thereby reducing the weight of the battery cell and increasing the battery energy density.

[0029] In some embodiments of the present application, the avoidance groove passes through the cross arm in a direction away from the electrode component.

[0030] In the above scheme, the avoidance groove is a hole that passes through the cross arm. On the one hand, it can realize visual assembly of the convex part of the pole body and the concave part of the vertical arm during the installation and matching process, thereby reducing the assembly difficulty and saving assembly time. On the other hand, it can further reduce the weight of the cross arm and the overall weight of the pole component, thereby reducing the weight of the battery cell and further improving the battery energy density.

[0031] In some embodiments of the present application, the first insulating member includes: an outer ring portion, wrapped around the side of the vertical arm facing away from the pole body; an inner ring portion, arranged between the vertical arm and the pole body, and connected to the outer ring portion; a first extension portion, arranged between the recessed portion and the convex portion, and connecting the outer ring portion and the inner ring portion; a second extension portion, arranged in the avoidance groove, and connecting the outer ring portion and the inner ring portion.

[0032] In the above technical solution, the first insulating member of the above structure is adopted, the outer ring part can insulate the outer side of the vertical arm, the inner ring part can insulate between the vertical arm and the pole body, the first extension part can insulate between the concave part and the convex part, and the second extension part can insulate between the pole body and the avoidance groove. As a result, the first insulating member can play a more comprehensive and sufficient insulation effect, reducing the risk of electrical breakdown of the pole component, and can also play a certain sealing role while playing an insulating role, reducing the probability of leakage points on the pole component, thereby improving the reliability of the pole component and the reliability of the battery cell.

[0033] In some embodiments of the present application, the outer ring portion, the inner ring portion, the first extension portion, and the second extension portion are an integral injection molded part.

[0034] In the above technical solution, the first insulating member is a one-piece injection-molded part, which can eliminate the connection gaps between the outer ring portion, the inner ring portion, the first extension portion, and the second extension portion, thereby further reducing the risk of electrical breakdown. Furthermore, the first insulating member being a one-piece injection-molded part can also improve the overall structural strength of the first insulating member, reduce the probability of deformation or damage to the battery cell when subjected to external forces, improve the reliability of the first insulating member, and thus help improve the reliability of the battery cell. Furthermore, the first insulating member being a one-piece injection-molded part has a relatively simple process, which can reduce costs and increase production capacity.

[0035] In some embodiments of the present application, the inner ring portion, the first extension portion, and the second extension portion are an integral injection-molded part, and the outer ring portion is injection-molded and connected to the inner ring portion.

[0036] In the above technical solution, the first insulating part is a split structural part, and the inner ring part, the first extension part and the second extension part can be injection molded first, and then the outer ring part can be injection molded and connected to the inner ring part, the first extension part and the second extension part. This method has higher operational flexibility, can adapt to different needs, and is suitable for different manufacturing processes, facilitates assembly, and reduces costs.

[0037] In some embodiments of the present application, the connecting component includes a cantilever, which is provided at one end of the vertical arm away from the first wall and extends toward a side close to the pole body, and the cantilever presses the pole body through the first insulating member.

[0038] In the above technical solution, the connecting component includes not only a vertical arm that cooperates with the pole body, but also a cantilever connected to the vertical arm and extending toward the side close to the pole body. The cantilever can thus limit the side of the pole body that is away from the first wall. After the vertical arm and the cantilever are connected to the pole body through the first insulating member, a more stable and reliable structure can be formed, thereby improving the installation reliability of the pole body. Moreover, the structure formed by the vertical arm and the cantilever can better surround the pole body, providing better protection, reducing the risk of deformation or damage to the pole body due to external forces, improving the reliability of the pole component, and thus improving the reliability of the battery cell. The first insulating member can extend to the surface of the pole body through the cantilever, enhancing the insulation around the pole body and reducing the risk of short circuits.

[0039] In some embodiments of the present application, the pole component includes a seal, which surrounds the pole body and seals between the pole body and the connecting component.

[0040] In the above technical solution, by arranging a seal between the pole body and the connecting component, the sealing between the pole body and the connecting component can be improved, so that the pole component has self-sealing properties, thereby improving the sealing between the pole component and the shell component, which is beneficial to improving the reliability of the battery cell.

[0041] In some embodiments of the present application, the sealing component and the first insulating component are integrally formed.

[0042] In the above technical solution, the above structure can reduce the difficulty of manufacturing the assembly consisting of the seal and the first insulating member, simplifying the manufacturing process, reducing costs, and increasing production. Furthermore, the seal and the first insulating member are integrally formed, eliminating a gap between them. This reduces leakage points on the terminal component, further improving the sealing performance of the terminal component, and enhancing the reliability of the battery cell.

[0043] In some embodiments of the present application, the pole component includes a second insulating component, which surrounds the pole body, covers a side of the connecting component facing the inside of the housing component, and is connected to the connecting component.

[0044] Since the pole components generally need to be welded to the shell components in conventional pole structures, the connecting components of the present application are usually made of metal to facilitate welding with the shell components. In the above technical solution, the second insulating member can play an insulating role on the side of the pole body close to the electrode component, and can reduce the risk of short circuit caused by contact between the electrode component and the connecting member during the connection between the pole body and the electrode component. Even if the connecting member is not a metal member, the second insulating member is also helpful in reducing the probability of short circuit caused by contact between the electrode component and the first wall. In other words, the adoption of the above solution can improve the reliability of the battery cell during the production process, which is conducive to improving the product yield.

[0045] In some embodiments of the present application, one of the second insulating member and the connecting member is provided with a clamping portion, and the other is provided with a clamped portion, and the clamped portion and the clamping portion are detachably connected. In this solution, on the one hand, this detachable structure is relatively simple, easy to install or disassemble, and can improve assembly efficiency; on the other hand, this detachable structure facilitates the subsequent replacement or repair of damaged parts, which can reduce usage costs.

[0046] In some embodiments of the present application, the second insulating member and the first insulating member are integrally formed.

[0047] In the above technical solution, the second insulating member and the first insulating member are integrally formed, which simplifies the molding process for the second and first insulating members, reduces the number of production steps, and improves production output. Furthermore, the integral molding of the second and first insulating members eliminates gaps between them, reducing leakage points on the terminal component, further improving the sealing of the terminal component, and enhancing the reliability of the battery cell.

[0048] In some embodiments of the present application, the pole component includes a seal, which surrounds the pole body and seals between the pole body and the connecting component. The seal, the first insulating member, and the second insulating member are an integrally formed part.

[0049] In the above technical solution, the seal, the first insulating member, and the second insulating member can be integrally molded to form a single component. This simplifies the molding process of the seal, the first insulating member, and the second insulating member, reduces manufacturing difficulty, and thus reduces costs, which is conducive to increasing production. Furthermore, this solution can also enable the seal, the first insulating member, and the second insulating member to form a stable and reliable structure, which can reduce the risk of deformation or damage to the seal, the first insulating member, and the second insulating member when the battery cell is subjected to external forces, thereby improving the sealing and insulation of the pole component, and thus improving the reliability of the pole component and the battery cell. The seal, the first insulating member, and the second insulating member are integrally molded, and there is no gap between them. This can further reduce leakage points on the pole component, thereby further improving the sealing and insulation of the pole component, and helping to further improve the reliability of the battery cell.

[0050] In some embodiments of the present application, the battery cell includes a third insulating member, which covers the side of the first wall facing the inside of the shell component. The third insulating member is provided with a mating hole, which corresponds to the mounting hole and serves as a reference surface parallel to the first wall. The edge of the mating hole in the orthographic projection of the reference surface is located within the orthographic projection of the second insulating member on the reference surface.

[0051] In the above solution, the third insulating member can insulate on the side of the first wall close to the electrode component, reducing the risk of short circuiting due to contact with the shell component when the electrode component is inserted into the shell or when the electrode component and the pole component are connected. The matching hole corresponds to the mounting hole, thereby providing a passage for connecting the pole body and the electrode component, facilitating the connection between the pole body and the electrode component. The projections of the second insulating member and the third insulating member on the reference surface can partially overlap, which can improve the insulation of the connection point between the second insulating member and the third insulating member, helping to reduce the probability of gaps and improve the reliability of the battery cell.

[0052] In some embodiments of the present application, the second insulating member and the connecting member are detachably connected, and the third insulating member is provided with a limiting portion, which extends toward one side of the pole body and is located on a side of the second insulating member close to the electrode member.

[0053] In the above solution, the second insulating member and the connecting member are detachable, facilitating repair or replacement. The third insulating member, through a stopper, acts as a limiter on the side of the second insulating member closest to the electrode member. This supports the second insulating member when it separates from the connecting member, reducing the risk of the second insulating member falling into the housing and causing insulation failure. This ensures stable and reliable insulation of the terminal member, improving the reliability of the terminal member and, in turn, the reliability of the battery cell.

[0054] In some embodiments of the present application, the side of the vertical arm facing away from the pole body is connected to the first wall, the peripheral side of the pole body is provided with a protrusion, and the vertical arm has a stop end facing the inner side of the shell component, and the stop end is connected to the protrusion through the first insulating member.

[0055] In the above technical solution, the connecting component can include only a vertical arm, which is connected to the first wall, and the abutting end of the vertical arm near the inner side of the shell component can pass through the abutting protrusion of the first insulating member. In this way, when the battery cell is subjected to external forces, the vertical arm can limit the terminal body, reducing the chance of the terminal body being pulled out of the shell component. The above connecting component has a relatively simple structure and good manufacturability, which can reduce costs and reduce the size of the connecting component, making it suitable for thin battery cells. It also reduces the overall weight of the terminal component, which is beneficial for improving the energy density of the battery cell.

[0056] In some embodiments of the present application, the shell component includes a shell and an end cover, the shell is provided with an opening, the end cover is covered on the opening, and is provided with a first wall.

[0057] In the above technical solution, a first wall can be provided on the end cap of the shell component, so that the pole component can be first installed on the end cap, and then installed on the shell together with the end cap. This method can reduce the difficulty of assembling the pole component, improve manufacturability, and help improve product yield. Moreover, because the thickness of the end cap is usually greater than the thickness of the shell, the end cap can provide better support for the pole component and better restrain the pole component, reducing the chance of deformation or damage of the pole component due to large force. Secondly, the pole component is also easier to seal on the end cap with a sealing ring, reducing the risk of electrolyte leakage. In other words, the above solution can improve the reliability of the pole component and the reliability of the battery cell.

[0058] In some embodiments of the present application, the shell component includes a shell and an end cover, the shell is provided with an opening and a first wall, and the end cover is provided to cover the opening.

[0059] In the above technical solution, a first wall can be provided on the shell of the housing component, thereby allowing the terminal component to be directly mounted on the housing. Since the terminal component does not occupy the space of the end cap, the internal space layout of the housing can be more compact, which is conducive to improving the energy density of the battery cell. The above solution also reduces the structural complexity of the end cap and the difficulty of assembling the end cap, thereby reducing the occurrence of electrolyte leakage caused by improper end cap assembly, thereby improving the reliability of the battery cell.

[0060] In a second aspect, an embodiment of the present application further provides a battery device comprising a battery cell as described in any of the above items.

[0061] In the above technical solution, since the terminal component of the battery cell has a high structural strength, the terminal component can withstand a large external force during the use of the battery device, and the probability of rupture or damage is higher. The battery cell can have a higher reliability, thereby improving the reliability of the battery device.

[0062] In a third aspect, an embodiment of the present application further 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.

[0063] In the above technical solution, since the pole component of the battery cell has a high structural strength, the pole component can withstand a large external force and is more likely to break or be damaged. The battery cell can have a high reliability, and the battery device using the battery cell also has a high reliability, thereby improving the reliability of the electrical device including the battery cell or the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] 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.

[0065] Figure 1 A schematic diagram of the structure of a vehicle is provided as the electrical device provided in some embodiments of the present application;

[0066] Figure 2 An exploded view of the structure of a battery device provided in some embodiments of the present application;

[0067] Figure 3 Schematic diagram of the internal structure of a battery cell provided in some embodiments of the present application Figure 1 ;

[0068] Figure 4 for Figure 3 Sectional view along line AA;

[0069] Figure 5 A top view of a pole component provided in some embodiments of the present application;

[0070] Figure 6 for Figure 5 Cross-sectional view along line BB;

[0071] Figure 7 for Figure 6 A schematic structural diagram of the embodiment of the pole component without the first insulating member;

[0072] Figure 8 for Figure 5 Cross-sectional view along line CC;

[0073] Figure 9 for Figure 8 A schematic structural diagram of the embodiment of the pole component without the first insulating member;

[0074] Figure 10 A schematic diagram of a partial structure of a battery cell provided in some embodiments of the present application;

[0075] Figure 11 A schematic diagram of the three-dimensional structure of a battery cell provided in some embodiments of the present application;

[0076] Figure 12 A partial view of an exploded view of a battery cell provided in some embodiments of the present application;

[0077] Figure 13 Schematic diagram of the internal structure of a battery cell provided in some embodiments of the present application Figure 2 ;

[0078] Figure 14 for Figure 13 A local enlarged schematic diagram of location I;

[0079] Figure 15 Schematic diagram of the internal structure of a battery cell provided in some embodiments of the present application Figure 3 ;

[0080] Figure 16 for Figure 15 A local enlarged schematic diagram of location II;

[0081] Figure 17 A schematic diagram of the three-dimensional structure of a pole component provided in some embodiments of the present application;

[0082] Figure 18 A schematic diagram of the three-dimensional structure of a connecting component provided in some embodiments of the present application;

[0083] Figure 19Schematic diagram of the three-dimensional structure of the pole component provided in other embodiments of the present application;

[0084] Figure 20 for Figure 19 An exploded view of a pole component provided in an embodiment;

[0085] Figure 21 Schematic diagram of the internal structure of a pole component provided in some other embodiments of the present application;

[0086] Figure 22 Schematic diagram of the three-dimensional structure of battery cells provided in other embodiments of the present application.

[0087] icon:

[0088] 1000. Electrical devices;

[0089] 100. Battery device;

[0090] 10. Box body; 11. First box body; 12. Second box body;

[0091] 20. Battery cells;

[0092] 21. Shell parts;

[0093] 201, first wall; 201a, mounting hole;

[0094] 211. Shell; 212. End cover;

[0095] 22. Electrode components;

[0096] 23. Pole components;

[0097] 231, pole body; 231a, second outer contour;

[0098] 232, connecting component; 2321, vertical arm; 2321a, first inner contour; 2321b, first outer contour; 2321c, opening; 2321d, stop end; 2322, horizontal arm; 2322a, avoidance groove; 2323, adapter; 2324, cantilever;

[0099] 233, first insulating member; 2331, outer ring portion; 2332, inner ring portion; 2333, first extension portion; 2334, second extension portion;

[0100] 234, seals;

[0101] 235, second insulating member;

[0102] 2301, concave portion; 2302, convex portion; 2303, engaging portion; 2304, engaged portion;

[0103] 24, third insulating member; 24a, matching hole; 241, limiting portion;

[0104] 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] The term "plurality" used in this application refers to two or more (including two).

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] New energy vehicles have experienced rapid development in recent years. Batteries, as the power source, play an irreplaceable and important role in electric vehicles. Batteries consist of a housing and multiple cells contained within it. As core components of new energy vehicles, batteries have high safety and longevity requirements.

[0119] In a typical battery, the battery includes multiple battery cells, which are connected in series, parallel, or mixed through a busbar, wiring harness, or adapter. This makes the battery cell terminals susceptible to external forces. It is common for the terminals to be subjected to external forces away from the outer casing. For ease of understanding, we can use the example of a battery cell terminal arranged at the top of the outer casing. In this case, the external force applied to the terminal away from the outer casing can refer to a vertical force. When the external force applied to the terminal is large, the probability of the terminal breaking is greater, which will affect the reliability of the terminal and, in turn, the reliability of the battery cell.

[0120] Based on the above considerations, and to address the problem of battery cell terminals being susceptible to breakage when subjected to significant external forces, the applicant has designed a battery cell comprising: a housing component, an electrode component, and a terminal component. The housing component includes a first wall having a mounting hole defined therein; the electrode component is housed within the housing component; the terminal component is mounted within the mounting hole and comprises a terminal body, a connecting component, and a first insulating member. The terminal body is connected to the electrode component, and the connecting component is connected to the first wall and insulated from the terminal body via the first insulating member. The connecting component includes a vertical arm extending away from the first wall, with the projection of the vertical arm on the first wall at least partially overlapping with the projection of the terminal body on the first wall along the thickness direction of the first wall.

[0121] In a battery cell of this structure, because 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 in the thickness direction of the first wall, the vertical arm can limit the pole body. Since the vertical arm has high strength in the thickness direction of the first wall and is not easily deformed, it can provide strong support and better limit the position. When the pole body is subjected to an external force in a direction away from the first wall, the vertical arm can press against the pole body, giving the pole component as a whole a high structural strength and reducing the chance of the pole body being pulled out of the housing component. Secondly, because 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, it can also reduce the chance of shaking, deformation, or displacement when the pole body and the connecting component are mated, thereby improving the installation stability of the pole body. In other words, the above-mentioned structure can improve the reliability of the pole component, thereby improving the reliability of the battery cell.

[0122] The battery cells or battery devices disclosed in the embodiments of this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery cells disclosed in this application can be used to form such an electrical device, thereby increasing the scope of application of the battery cells.

[0123] The embodiments of the present application provide 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 vehicle, a ship, a spacecraft, and the like. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy, and an electric airplane toy, and the like. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0124] 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.

[0125] Please refer to Figure 1 , Figure 1The power-consuming device provided for some embodiments of the present application is a schematic structural diagram of a vehicle. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and 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 may also include a controller 200 and a motor 300, and 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] Please refer to Figure 2 The battery device 100 includes multiple rows of battery cells 20, which are arranged along the length direction of the box body 10, and each row of battery cells 20 includes multiple battery cells 20 arranged along the width direction of the box body 10; or, multiple rows of battery cells 20 are arranged along the width direction of the box body 10, and each row of battery cells 20 includes multiple battery cells 20 arranged along the length direction of the box body 10.

[0130] 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 2 In FIG, the battery cell 20 is in the shape of a rectangular parallelepiped.

[0131] According to some embodiments of the present application, referring to Figures 3 to 9 The embodiment of the present application provides a battery cell 20 , including: a shell component 21 , an electrode component 22 and a pole component 23 .

[0132] The housing component 21 includes a first wall 201, which is provided with a mounting hole 201a. The electrode component 22 is housed in the housing component 21. The pole component 23 is mounted in the mounting hole 201a and includes a pole body 231, a connecting component 232, and a first insulating member 233. 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 via the first insulating member 233. The connecting component 232 includes a vertical arm 2321, which extends 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.

[0133] The shell component 21 may refer to a shell structure for wrapping and protecting the chemical materials and components inside the battery. The shell component 21 may include multiple shell walls, which are connected and combined to form a shell structure. The first wall 201 may refer to one of the multiple shell walls, which 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 11 The housing component 21 is in the shape of a cuboid, and the first wall 201 is the top wall of the housing component 21. The mounting hole 201a may be a through hole penetrating the first wall 201, for mounting the pole component 23.

[0134] 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.

[0135] The pole component 23 may refer to a component mainly made of a metal material with good conductivity. It is a key component connecting the internal and external circuits of the battery cell 20. It is responsible for conducting the current generated inside the battery cell 20 to the external circuit, or introducing the current of the external power supply into the battery cell 20 during charging.

[0136] As an example, the number of pole components 23 can be one or more. When there is one pole component 23, the pole component 23 is a negative pole; when there are multiple pole components 23, some of the multiple pole components 23 can be positive poles and the rest can be negative poles, or all of the multiple pole components 23 can be negative poles.

[0137] 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.

[0138] The connecting member 232 may refer to a member for connecting the pole body 231 and the first wall 201 .

[0139] The first insulating member 233 may be a member used to insulate the connection member 232 from the pole body 231. The first insulating member 233 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 233. 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.

[0140] "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 Figures 6 to 10 The second direction Y, the height direction may refer to Figures 6 to 10 The third direction Z.

[0141] “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.

[0142] “Along the thickness direction of the first wall 201 ”, as an example, the thickness direction of the first wall 201 may refer to Figure 3 、 Figure 11 and Figure 12 The third direction Z.

[0143] “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 (see Figure 4 ), 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 233, thereby limiting the displacement of the pole body 231.

[0144] 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.

[0145] Especially for thinner battery cells (the thickness of the battery cell can be referred to Figure 11 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 11 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.

[0146] 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.

[0147] 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.

[0148] In some embodiments of the present application, reference is made to Figure 4 、 Figure 7 、 Figure 9 and Figure 10 Along the thickness direction of the first wall 201, the projection of the vertical arm 2321 on the first wall 201 has a first inner contour 2321a and a first outer contour 2321b; along the thickness direction of the first wall 201, the projection of the pole body 231 on the first wall 201 has a second outer contour 231a; at least part of the first inner contour 2321a is located within the second outer contour 231a.

[0149] "Thickness direction of the first wall 201" Figure 3 The third direction Z.

[0150] The “first inner contour 2321a of the vertical arm 2321” may refer to the inner edge of the figure formed by the projection of the vertical arm 2321 on the first wall 201, as shown in FIG. Figure 4 、 Figure 7 、 Figure 9 ,because Figure 4 for Figure 3 In the cross-sectional view taken along line AA, the first inner contour 2321 a may be an auxiliary dotted line drawn on the inner side of the vertical arm 2321 .

[0151] The “first outer contour 2321b of the vertical arm 2321” may refer to the outer edge of the figure formed by the projection of the vertical arm 2321 on the first wall 201, as shown in FIG. Figure 4 、 Figure 7 、 Figure 9 ,because Figure 4 for Figure 3 In the cross-sectional view taken along line AA, the first outer contour 2321 b may be an auxiliary dotted line drawn on the outer side of the vertical arm 2321 .

[0152] Reference Figure 4 The “second outer contour 231 a of the pole body 231 ” may refer to an outer edge line of a figure formed by the projection of the pole body 231 on the first wall 201 .

[0153] The first inner contour 2321a may be partially located in the second outer contour 231a. As an example, the first inner contour 2321a and the second outer contour 231a may be irregular contours, including but not limited to tooth-shaped contours, wavy contours, etc. For example, referring to Figure 4 , part of the first inner contour 2321a and the second outer contour 231a have an overlapping area.

[0154] The first inner contour 2321a may also be entirely located within the second outer contour 231a. As an example, the first inner contour 2321a and the second outer contour 231a may be regular contours, including but not limited to circular, rectangular, or racetrack shapes, etc. For example, referring to Figure 10 The connecting part 232 may only include a vertical arm 2321, the vertical arm 2321 is connected to the first wall 201, and a convex edge is provided at one end of the pole body 231 close to the inner side of the shell part 21, and the convex edge is located on the side of the vertical arm 2321 close to the inner side of the shell part 21, thereby, in the thickness direction of the first wall 201 (i.e. Figure 10 In the third direction X), the first inner contour 2321a is entirely located in the second outer contour 231a.

[0155] In the above technical solution, while ensuring that the vertical arm 2321 can limit the position of the pole body 231, the positional relationship between the first inner contour 2321a of the vertical arm 2321 and the second outer contour 231a of the pole body 231 can be flexibly selected according to different requirements, thereby reducing the difficulty in processing the pole body 231 and the vertical arm 2321 and improving the manufacturability of the pole component 23. Furthermore, the above solution can also improve the space utilization between the vertical arm 2321 and the pole body 231. When the first inner contour 2321a is partially located within the second outer contour 231a, a more compact layout can be achieved within the limited space, fully utilizing the gaps between the various components and making the overall structure more compact. When the first inner contour 2321a is entirely located within the second outer contour 231a, the space utilization can be further maximized, which helps to reduce the volume of the pole component 23, and thus reduce the volume of the battery cell 20, thereby increasing the battery energy density.

[0156] In some embodiments of the present application, at least a portion of the second outer profile 231 a is located within the first outer profile 2321 b .

[0157] The second outer contour 231a of the pole body 231 may be partially located within the first outer contour 2321b of the vertical arm 2321, that is, the second outer contour 231a may partially exceed the first outer contour 2321b. As an example, the second outer contour 231a may be an irregular contour, including but not limited to a tooth-shaped contour or a wavy contour, etc.

[0158] The second outer contour 231a of the pole body 231 may also be entirely located within the first outer contour 2321b of the vertical arm 2321, that is, the second outer contour 231a does not exceed the first outer contour 2321b. Figure 4 .

[0159] In the above technical solution, the second outer contour 231a of the pole body 231 can be partially or completely located within the first outer contour 2321b of the arm 2321, thereby increasing the structural design flexibility of the arm 2321 and the pole body 231. When the second outer contour 231a is partially located within the first outer contour 2321b, the relative position of the pole body 231 and the arm 2321 can be flexibly adjusted as needed to accommodate different spatial constraints and functional requirements, thus enabling diverse designs for the pole component 23. When the second outer contour 231a is entirely located within the first outer contour 2321b, the positional distribution of the pole body 231 and the arm 2321 can be made more compact, which helps reduce the volume of the pole component 23, saves installation space for the pole component 23, and thus reduces the volume of the battery cell 20 and improves the battery energy density.

[0160] In some embodiments of the present application, reference is made to Figure 4 , a portion of the first inner contour 2321a is located within the first outer contour 2321b, and the entire second outer contour 231a is located within the first outer contour 2321b.

[0161] In the above technical solution, a portion of the first inner contour 2321a of the vertical arm 2321 is located within the first outer contour 2321b of the vertical arm 2321, which can form a certain spatial hierarchy in the structure of the vertical arm 2321 itself. On the premise that the vertical arm 2321 can limit the pole body 231, it is beneficial to integrate the space between the vertical arm 2321 and the pole body 231, improve space utilization, and make the vertical arm 2321 and the pole body 231 more compact, which is beneficial to further reduce the volume of the battery cell 20 and improve the battery energy density.

[0162] The entire second outer contour 231a of the pole body 231 is located within the first outer contour 2321b of the vertical arm 2321. This, on the one hand, allows the vertical arm 2321 to have a relatively flat overall appearance, and the pole body 231 does not protrude beyond the outside of the vertical arm 2321. This helps to make the pole component 23 more uniform overall, facilitates processing and manufacturing, and can also reduce the size of the pole component 23, thereby increasing the battery's energy density. On the other hand, when the first insulating member 233 covers the outside of the vertical arm 2321, the above solution also helps to maintain the overall thickness of the first insulating member 233 on the outside of the vertical arm 2321, which can reduce the problem of stress concentration in the first insulating member 233 and help reduce electrical breakdown. It can be seen that the above technical solution, while ensuring that the vertical arm 2321 can limit the pole body 231, is conducive to balanced control of the size, appearance, manufacturability, and other properties of the pole component 23.

[0163] In some embodiments of the present application, reference is made to Figure 4 、 Figure 5 、 Figures 7 to 9 、 Figure 12 、 Figures 17 to 20 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 233.

[0164] “The vertical arm 2321 is arranged around the circumference of the pole body 231” can be understood as the vertical arm 2321 being an annular arm plate, which is conducive to providing a limiting effect on multiple positions of the circumference of the pole body 231, thereby enhancing the limiting effect of the vertical arm 2321 on the pole body 231. For example, referring to Figure 4 、 Figure 12 、 Figures 17 to 20 , the vertical arm 2321 is a ring-shaped component.

[0165] The concave portion 2301 may be, but is not limited to, a groove, a through hole, etc. The convex portion 2302 may refer to a structure protruding from the surface of the vertical arm 2321 or the pole body 231. For example, Figure 17 、 Figure 19 and Figure 20 , the protrusion 2302 is a protruding tooth.

[0166] Reference Figures 17 to 20The vertical arm 2321 may be provided with a recess 2301 on its circumferential side, 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 233” can be understood as follows: the first insulating member 233 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 233 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] In some embodiments of the present application, reference is made to Figure 10 , the connecting component 232 and the first wall 201 are integrally formed.

[0172] In the above technical solution, since the vertical arm 2321 of the connecting component 232 is used to limit the pole body 231, by integrally forming the connecting component 232 and the first wall 201 of the shell component 21, there is no connection gap between the connecting component 232 and the first wall 201, which can reduce the weak points between the connecting component 232 and the first wall 201, so that the overall structural strength of the connecting component 232 and the shell component 21 is higher and stronger. When the battery cell 20 is subjected to external impact, extrusion or vibration, it can better withstand stress and reduce the risk of deformation or damage, which is conducive to improving the reliability of the vertical arm 2321 to limit the pole body 231, and further improving the installation stability and reliability of the pole body 231.

[0173] Secondly, the connecting component 232 and the first wall 201 are integrally formed, with no gap between them. This can reduce potential leakage paths in the battery cell 20, thereby improving the sealing of the battery cell 20 and further enhancing the reliability of the battery cell 20. Furthermore, the integral formation of the connecting component 232 and the first wall 201 can reduce assembly steps, reduce complexity in the manufacturing process of the battery cell 20, improve production efficiency, reduce costs, and reduce the incidence of quality problems caused by poor connection between the connecting component 232 and the housing component 21, thereby improving the consistency and quality stability of the battery cell 20.

[0174] In some embodiments of the present application, the vertical arm 2321 is perpendicular to the first wall 201 .

[0175] In the above technical solution, the vertical structure formed by the vertical arm 2321 and the first wall 201 of the housing component 21 enables the vertical arm 2321 to provide more stable support for the pole body 231, which helps to maintain the pole body 231 in a relatively stable position. It can also better withstand the force applied to the pole body 231 when the battery cell 20 is subjected to external forces, thereby improving the reliability of the pole component 23 and further improving the reliability of the battery cell 20. Secondly, the structure of the vertical arm 2321 perpendicular to the first wall 201 is relatively simple and easy to manufacture and process, which helps to improve the consistency and quality stability of the pole component 23.

[0176] In some embodiments of the present application, reference is made to Figures 5 to 9 、 Figure 12 、 Figure 14 、 Figures 16 to 20The connecting component 232 includes a horizontal arm 2322, which surrounds the pole body 231 and connects the vertical arm 2321 and the first wall 201. The horizontal arm 2322 and the vertical arm 2321 are arranged at an angle.

[0177] The horizontal arm 2322 may be a substantially horizontal arm plate. In this exemplary embodiment, both the horizontal arm 2322 and the vertical arm 2321 may be annular components disposed around the circumference of the pole body 231. Furthermore, in this exemplary embodiment, the connecting component 232 may only include the vertical arm 2321 and the horizontal arm 2322, with the horizontal arm 2322 connected to the first wall 201.

[0178] “The horizontal arm 2322 and the vertical arm 2321 are arranged at an angle” may mean that there is an angle between the horizontal arm 2322 and the vertical arm 2321, and the angle may be approximately 90 degrees, so that the horizontal arm 2322 can be connected to the first wall 201, so that the vertical arm 2321 can be closer to the circumferential side of the pole body 231, thereby playing a better circumferential limiting role.

[0179] In the above technical solution, the cross arm 2322 of the connecting member 232 having the above structure can prevent the vertical arm 2321 from directly contacting the first wall 201. That is, the cross arm 2322 can provide a location for connection with the first wall 201. Since the cross arm 2322 is primarily used for connection with the first wall 201 and can provide a suitable operating space, the connection between the cross arm 2322 and the first wall 201 is facilitated. Furthermore, the connecting member 232 having the above structure can also reduce the impact on the vertical arm 2321 when the connecting member 232 is connected to the first wall 201, thereby reducing the probability of the vertical arm 2321 being broken or damaged. This can improve the stability and reliability of the vertical arm 2321, and enhance the reliability of the structure formed between the vertical arm 2321 and the pole body 231.

[0180] Optionally, refer to Figures 17 to 20 The vertical arm 2321 and the horizontal arm 2322 are integrally formed parts.

[0181] In this alternative example, refer to Figure 17 and Figure 18 , the vertical arm 2321 and the horizontal arm 2322 can be runway-shaped as a whole; or, referring to Figure 19 and Figure 20 The vertical arm 2321 and the horizontal arm 2322 can be circular as a whole.

[0182] With this solution, the overall consistency of the connecting member 232 is better, the structural strength is higher, and the reliability of the connecting member 232 can be improved. On the other hand, the vertical arm 2321 and the horizontal arm 2322 are integrally formed, which can also reduce the processing difficulty of the connecting member 232 and reduce costs.

[0183] In some embodiments of the present application, reference is made to Figures 5 to 9 、 Figures 12 to 16 The connecting component 232 includes a horizontal arm 2322 and an adapter 2323. The horizontal arm 2322 surrounds the pole body 231 and connects the vertical arm 2321. The horizontal arm 2322 and the vertical arm 2321 are arranged at an angle. The adapter 2323 surrounds the pole body 231 and connects the horizontal arm 2322 and the first wall 201.

[0184] The adapter 2323 may refer to a component for connecting the cross arm 2322 and the first wall 201. The adapter 2323 may be, but is not limited to, a plate-shaped component or a block-shaped component. For example, referring to Figure 5 and Figure 12 Adapter 2323 may be an adapter plate. Adapter 2323 may also be made of, but not limited to, metal or composite materials. Metal materials include, but are not limited to, aluminum, copper, and steel. Adapter 2323 and first wall 201 may be connected by, but not limited to, welding, riveting, or clamping.

[0185] "The adapter 2323 surrounds the pole body 231" may mean that the adapter 2323 is a ring-shaped component. For details, please refer to Figure 12 .

[0186] In the above technical solution, since the connecting component 232 includes not only the vertical arm 2321 that limits the pole body 231, but also the adapter 2323 connected to the first wall 201, and the horizontal arm 2322 connecting the vertical arm 2321 and the adapter 2323, the entire pole component 23 can be assembled outside the shell component 21 and then connected to the first wall 201 through the adapter 2323. There is no need to assemble the various parts of the pole component 23 on the shell component 21. This can reduce the difficulty of assembling the pole component 23, facilitate the installation and coordination of the pole component 23 and the shell component 21, and save installation time and cost.

[0187] Secondly, in conventional pole component structures, the pole body needs to be pressed against the sealing component placed on the first wall of the shell component to achieve sealing of the shell component. However, in this sealing method, in order to ensure the preload force required for sealing, the pole component applies a large pressure to the first wall. When the shell component is thin, it is easy to cause deformation or damage to the first wall. When the connecting component 232 of the above-mentioned structure of the present application is used, when the pole component 23 is installed on the first wall 201, because the connecting component 232 can be insulated and connected to the pole body 231 through the first insulating member 233, the sealing requirements between the adapter 2323 and the first wall 201 can be reduced, and there is no need to apply a large force to the pole component 23 to meet the sealing requirements at the connection between the adapter 2323 and the first wall 201. Therefore, the problem of stress deformation of the first wall 201 can be improved, which is conducive to reducing the wall thickness of the shell component 21, reducing the weight of the battery cell 20, and thus improving the battery energy density.

[0188] In some embodiments of the present application, the horizontal arm 2322 is perpendicular to the vertical arm 2321 .

[0189] In the above technical solution, the vertical structure formed by the horizontal arm 2322 and the vertical arm 2321 can provide higher structural strength, better withstand the force acting on the terminal body 231 when the battery cell 20 is subjected to external forces, improve the reliability of the terminal component 23, and further improve the reliability of the battery cell 20. The structure of the horizontal arm 2322 perpendicular to the vertical arm 2321 is also relatively simple, easy to manufacture and process, and conducive to improving the consistency and quality stability of the terminal component 23.

[0190] In some embodiments of the present application, reference is made to Figure 7 、 Figure 14 and Figure 16 The pole body 231 is provided with a convex portion 2302, and the vertical arm 2321 is provided with a concave portion 2301. The concave portion 2301 passes through the vertical arm 2321 in the direction close to the electrode component 22, and an opening 2321c is formed on one side of the vertical arm 2321 close to the electrode component 22.

[0191] In the above technical solution, since the protrusion 2302 of the pole body 231 is to be assembled with the recess 2301 of the arm 2321, the recess 2301 is extended through the arm 2321 toward the electrode component 22, and an opening 2321c is formed. The protrusion 2302 can enter the recess 2301 through the opening 2321c below the arm 2321, thereby facilitating the mating of the pole body 231 and the arm 2321. This can reduce the difficulty of installing the pole body 231 and the arm 2321, improve assembly efficiency, and reduce costs. The recess 2301 extends through the arm 2321 toward the side closest to the electrode component 22, further reducing the weight of the arm 2321, thereby reducing the weight of the pole component 23, and further reducing the weight of the battery cell 20, thereby increasing the battery energy density.

[0192] In some embodiments of the present application, reference is made to Figure 7 、 Figure 14 and Figure 16 The connecting component 232 includes a horizontal arm 2322 , which is connected to the vertical arm 2321 and is provided with an avoidance groove 2322 a , which is connected to the recess 2301 .

[0193] The avoidance groove 2322a may refer to an avoidance space provided on the inner side of the cross arm 2322 close to the housing component 21. In this exemplary embodiment, the avoidance groove 2322a may be, but is not limited to, a groove or a hole passing through the cross arm 2322, and no specific limitation is made here.

[0194] In the above technical solution, during the installation of the pole body 231 through the mating of the protrusion 2302 and the recess 2301 of the vertical arm 2321, the avoidance groove 2322a can provide lateral movement space for the protrusion 2302 of the pole body 231. That is, it provides redundant space in a direction parallel to the first wall 201 when the pole body 231 and the horizontal arm 2322 are installed. This provides a certain degree of error tolerance for the mating of the protrusion 2302 and the recess 2301, which helps to reduce the installation difficulty of the pole body 231 and the vertical arm 2321, save installation time, and improve assembly efficiency. In addition, the avoidance groove 2322a can reduce the weight of the horizontal arm 2322, thereby reducing the weight of the battery cell 20 and improving the battery energy density.

[0195] In some embodiments of the present application, reference is made to Figure 7 、 Figure 14 and Figure 16 The avoidance groove 2322 a passes through the cross arm 2322 in a direction away from the electrode component 22 .

[0196] In the above scheme, the avoidance groove 2322a is a hole that passes through the cross arm 2322. On the one hand, it can enable the convex portion 2302 of the pole body 231 and the concave portion 2301 of the vertical arm 2321 to be visually assembled during the installation and matching process, thereby reducing the assembly difficulty and saving assembly time. In addition, it can further reduce the weight of the cross arm 2322 and the overall weight of the pole component 23, thereby reducing the weight of the battery cell 20 and further improving the battery energy density.

[0197] In some embodiments of the present application, reference is made to Figure 6 and Figure 8 The first insulating member 233 includes an outer ring portion 2331, an inner ring portion 2332, a first extension portion 2333, and a second extension portion 2334. The outer ring portion 2331 wraps around the side of the vertical arm 2321 facing away from the pole body 231. The inner ring portion 2332 is located between the vertical arm 2321 and the pole body 231 and connects the outer ring portion 2331. The first extension portion 2333 is located between the concave portion 2301 and the convex portion 2302 and connects the outer ring portion 2331 and the inner ring portion 2332. The second extension portion 2334 is located within the avoidance groove 2322a and connects the outer ring portion 2331 and the inner ring portion 2332.

[0198] The outer ring portion 2331 may refer to a portion of the first insulating member 233 located outside the vertical arm 2321 .

[0199] The inner ring portion 2332 may refer to a portion of the first insulating member 233 located between the vertical arm 2321 and the pole body 231 .

[0200] The first extension portion 2333 may refer to a portion of the first insulating member 233 located between the concave portion 2301 and the convex portion 2302 .

[0201] The second extension portion 2334 may refer to a portion of the first insulating member 233 located in the avoiding groove 2322 a .

[0202] In the above technical solution, the first insulating member 233 of the above structure is adopted, the outer ring part 2331 can insulate the outer side of the vertical arm 2321, the inner ring part 2332 can insulate between the vertical arm 2321 and the pole body 231, the first extension part 2333 can insulate between the recessed part 2301 and the convex part 2302, and the second extension part 2334 can insulate between the pole body 231 and the avoidance groove 2322a. Therefore, the first insulating member 233 can play a more comprehensive and sufficient insulation effect, reducing the risk of electrical breakdown of the pole component 23, and can also play a certain sealing role while playing an insulating role, reducing the probability of leakage points on the pole component 23, thereby improving the reliability of the pole component 23 and the reliability of the battery cell 20.

[0203] In some embodiments of the present application, the outer ring portion 2331 , the inner ring portion 2332 , the first extension portion 2333 and the second extension portion 2334 are an integral injection molded part.

[0204] In the above technical solution, the first insulating member 233 is an integral injection-molded part, which eliminates any gaps between the outer ring portion 2331, the inner ring portion 2332, the first extension portion 2333, and the second extension portion 2334, thereby further reducing the risk of electrical breakdown. Furthermore, the integral injection-molded part of the first insulating member 233 can also improve the overall structural strength of the first insulating member 233, reduce the probability of deformation or damage to the battery cell 20 when subjected to external forces, improve the reliability of the first insulating member 233, and thus help improve the reliability of the battery cell 20. Furthermore, the integral injection-molded part of the first insulating member 233 simplifies the process, reduces costs, and increases production capacity.

[0205] In some embodiments of the present application, the inner ring portion 2332 , the first extension portion 2333 and the second extension portion 2334 are an integral injection molded part, and the outer ring portion 2331 is injection molded and connected to the inner ring portion 2332 .

[0206] In the above technical solution, the first insulating part 233 is a split structural part, and the inner ring part 2332, the first extension part 2333 and the second extension part 2334 can be injection molded first, and then the outer ring part 2331 can be injection molded, which is connected to the inner ring part 2332, the first extension part 2333 and the second extension part 2334. This method has higher operational flexibility, can adapt to different needs, and is suitable for different manufacturing processes, which is convenient for assembly and reduces costs.

[0207] In some embodiments of the present application, reference is made to Figure 21 The connecting component 232 includes a cantilever 2324 , which is provided at one end of the vertical arm 2321 away from the first wall 201 and extends toward a side close to the pole body 231 . The cantilever 2324 presses against the pole body 231 through the first insulating member 233 .

[0208] The cantilever 2324 may refer to an arm plate that is suspended relative to the vertical arm 2321, thereby making the vertical arm 2321 and the cantilever 2324 form an L-shape as a whole. In this embodiment, the connecting component 232 may further include a cross arm 2322, or include a cross arm 2322 and an adapter 2323.

[0209] In the above technical solution, the connecting component 232 includes not only a vertical arm 2321 that cooperates with the pole body 231, but also a cantilever 2324 that connects to the vertical arm 2321 and extends toward the side closer to the pole body 231. Thus, the cantilever 2324 can limit the side of the pole body 231 that faces away from the first wall 201. When the vertical arm 2321 and the cantilever 2324 are connected to the pole body 231 via the first insulating member 233, a more stable and reliable structure is formed, thereby improving the installation reliability of the pole body 231. Furthermore, the structure formed by the vertical arm 2321 and the cantilever 2324 can better surround and protect the pole body 231, reducing the risk of deformation or damage to the pole body 231 due to external forces, thereby improving the reliability of the pole component 23 and, consequently, the reliability of the battery cell 20. The first insulating member 233 can extend to the surface of the pole body 231 through the cantilever 2324 , thereby enhancing the insulation around the pole body 231 and reducing the risk of short circuit.

[0210] In some embodiments of the present application, reference is made to Figures 6 to 9 、 Figure 12 、 Figure 14 and Figure 16 The pole component 23 includes a seal 234 , which surrounds the pole body 231 and seals between the pole body 231 and the connecting component 232 .

[0211] The seal 234 is a component used to prevent leakage of internal materials within the battery cell 20 and to prevent external materials (such as moisture and dust) from entering the battery cell 20. The seal 234 is typically made of a material with excellent elasticity and sealing properties, including but not limited to rubber and silicone. The phrase "the seal 234 surrounds the terminal body 231" may indicate that, in this embodiment, the seal 234 is an annular component, providing a more comprehensive sealing effect.

[0212] In the above technical solution, by arranging a seal 234 between the pole body 231 and the connecting component 232, the sealing between the pole body 231 and the connecting component 232 can be improved, so that the pole component 23 has self-sealing properties, thereby improving the sealing between the pole component 23 and the shell component 21, which is beneficial to improving the reliability of the battery cell 20.

[0213] In some embodiments of the present application, the sealing member 234 and the first insulating member 233 are integrally formed.

[0214] As an example, the sealing member 234 and the first insulating member 233 may be integrally injection molded.

[0215] In the above technical solution, the above structure can reduce the difficulty of manufacturing the assembly formed by the seal 234 and the first insulating member 233, simplifying the manufacturing process, reducing costs, and improving production. Furthermore, the seal 234 and the first insulating member 233 are integrally formed, eliminating a gap between the seal 234 and the first insulating member 233. This reduces leakage points on the terminal component 23, further improving the sealing performance of the terminal component 23, and enhancing the reliability of the battery cell 20.

[0216] In some embodiments of the present application, reference is made to Figures 6 to 9 、 Figure 12 、 Figure 14 and Figure 16 The pole component 23 includes a second insulating member 235 , which surrounds the pole body 231 , covers a side of the connecting member 232 facing the inside of the housing component 21 , and is connected to the connecting member 232 .

[0217] The second insulating member 235 may be a component that can play an insulating role, and its material may be the same as or different from the first insulating member 233. The second insulating member 235 may also be, but is not limited to, an insulating sheet, an insulating film, etc. For example, referring to Figure 12 , the second insulating member 235 can be a plastic plate.

[0218] “The second insulating member 235 surrounds the pole body 231 ” can be understood as the second insulating member 235 being an annular member, thereby being able to insulate the circumference of the pole body 231 , thereby providing a more comprehensive insulation effect.

[0219] “The second insulating member 235 covers the side of the connecting member 232 facing the inside of the shell member 21” can be understood as that the second insulating member 235 can be fitted with the side of the connecting member 232 facing the inside of the shell member 21, or the second insulating member 235 can be separated from the side of the connecting member 232 facing the inside of the shell member 21, and it is sufficient to isolate the connecting member 232 and the electrode member 22.

[0220] The connection method between the second insulating member 235 and the connecting component 232 can be, but is not limited to, snap connection, screw connection, bonding, etc., and is not specifically limited here.

[0221] Since the pole component generally needs to be welded to the shell component in a conventional pole structure, the connecting component 232 of the present application is usually made of metal to facilitate welding with the shell component 21. In the above technical solution, the second insulating member 235 can play an insulating role on the side of the pole body 231 close to the electrode component 22, and can reduce the risk of the electrode component 22 and the connecting member 232 contacting each other and causing a short circuit during the connection between the pole body 231 and the electrode component 22. Even if the connecting member 232 is not a metal member, the second insulating member 235 is also beneficial to reduce the probability of the electrode component 22 and the first wall 201 contacting each other and causing a short circuit. In other words, the adoption of the above solution can improve the reliability of the battery cell 20 during the production process, which is beneficial to improving the product yield.

[0222] In some embodiments of the present application, reference is made to Figure 12 and Figure 14 One of the second insulating member 235 and the connecting member 232 is provided with a clamping portion 2303, and the other is provided with a clamped portion 2304. The clamped portion 2304 and the clamping portion 2303 are detachably connected.

[0223] The engaging portion 2303 and the engaged portion 2304 may be components that engage with each other. For example, the engaging portion 2303 may be a slot, and the engaged portion 2304 may be a protrusion or hook; alternatively, the engaging portion 2303 may be a hook, and the engaged portion 2304 may be a buckle. The engaging portion 2303 and the engaged portion 2304 may also have other engaging structures, which are not specifically limited in this application.

[0224] In the above technical solution, the second insulating member 235 and the connecting member 232 can be detachably connected through the clamping portion 2303 and the clamped portion 2304. On the one hand, this detachable structure is relatively simple and easy to install or disassemble, which can improve assembly efficiency; on the other hand, this detachable structure facilitates the subsequent replacement or repair of damaged parts, which can reduce the cost of use.

[0225] In some embodiments of the present application, the second insulating member 235 and the first insulating member 233 are integrally formed.

[0226] It can be understood that the second insulating member 235 and the first insulating member 233 can be integrally injection molded. As an example, a small hole for liquid injection material to pass through can be provided on the connecting member 232. A portion of the injection material melted by heat can form the first insulating member 233 on the outer side of the vertical arm 2321, and the other portion can be molded through the small hole on the side of the connecting member 232 close to the shell member 21.

[0227] In the above technical solution, the second insulating member 235 and the first insulating member 233 are integrally formed, which simplifies the molding process for the second insulating member 235 and the first insulating member 233, reduces the number of manufacturing steps, and improves production output. Furthermore, the integral molding of the second insulating member 235 and the first insulating member 233 eliminates a gap between the second insulating member 235 and the first insulating member 233, reducing leakage points on the terminal component 23, further improving the sealing of the terminal component 23, and enhancing the reliability of the battery cell 20.

[0228] In some embodiments of the present application, reference is made to Figure 6 and Figure 8 The pole component 23 includes a seal 234 , which surrounds the pole body 231 and seals between the pole body 231 and the connecting component 232 . The seal 234 , the first insulating member 233 and the second insulating member 235 are integrally formed.

[0229] In the above technical solution, the seal 234, first insulating member 233, and second insulating member 235 can be integrally molded into a single component. This simplifies the molding process for the seal 234, first insulating member 233, and second insulating member 235, reduces manufacturing complexity, and thus reduces costs, thereby facilitating increased production. Furthermore, this solution allows the seal 234, first insulating member 233, and second insulating member 235 to form a stable and reliable structure. This reduces the risk of deformation or damage to the seal 234, first insulating member 233, and second insulating member 235 when the battery cell 20 is subjected to external forces, thereby improving the sealing and insulation of the terminal component 23, and thereby enhancing the reliability of the terminal component 23 and the battery cell 20. The integral molding of the seal 234, first insulating member 233, and second insulating member 235 also creates a seamless gap between them, further reducing leakage points on the terminal component 23, thereby further improving the sealing and insulation of the terminal component 23, and further enhancing the reliability of the battery cell 20.

[0230] In some embodiments of the present application, reference is made to Figure 14 and Figure 16 The battery cell 20 includes a third insulating member 24, which covers the side of the first wall 201 facing the inside of the shell component 21. The third insulating member 24 is provided with a matching hole 24a, which corresponds to the mounting hole 201a and serves as a reference surface parallel to the first wall 201. The edge of the orthographic projection of the matching hole 24a on the reference surface is located within the orthographic projection of the second insulating member 235 on the reference surface.

[0231] The third insulating member 24 may refer to a component that plays an insulating role, and its material may refer to the first insulating member 233. The third insulating member 24 may be, but is not limited to, an insulating plate, an insulating film, etc. For example, referring to Figure 14 and Figure 16 The third insulating member 24 may be a plastic member. The mating hole 24a may be a through hole formed in the third insulating member 24, which may provide a passage for connecting the pole body 231 and the electrode component 22, allowing the tab of the electrode component 22 to pass through and connect to the pole body 231, or allowing a portion of the pole body 231 to pass through and connect to the tab of the electrode component 22.

[0232] The reference surface may refer to a plane perpendicular to the third direction Z. “The edge of the orthographic projection of the fitting hole 24 a on the reference surface is located within the orthographic projection of the second insulating member 235 on the reference surface” can be understood as meaning that the fitting hole 24 a is smaller than the second insulating member 235 and is covered by the second insulating member 235 , thereby causing the projections of the second insulating member 235 and the third insulating member 24 on the reference surface to overlap.

[0233] In the above solution, the third insulating member 24 can insulate on the side of the first wall 201 close to the electrode component 22, reducing the risk of a short circuit caused by contact with the shell component 21 when the electrode component 22 is inserted into the shell or when the electrode component 22 and the pole component 23 are connected. The matching hole 24a corresponds to the mounting hole 201a, thereby providing a passage when the pole body 231 is connected to the electrode component 22, facilitating the connection between the pole body 231 and the electrode component 22. The edge of the matching hole 24a, as projected on a reference surface parallel to the first wall 201, is located within the orthographic projection of the second insulating member 235 on the reference surface, thereby allowing the projections of the second insulating member 235 and the third insulating member 24 on the reference surface to partially overlap, thereby improving the insulation of the connection position between the second insulating member 235 and the third insulating member 24, which is beneficial to reducing the probability of gaps and improving the reliability of the battery cell 20.

[0234] In some embodiments of the present application, reference is made to Figure 14 and Figure 16 The second insulating member 235 and the connecting member 232 are detachably connected. The third insulating member 24 is provided with a limiting portion 241 . The limiting portion 241 extends toward one side of the pole body 231 and is located on a side of the second insulating member 235 close to the electrode member 22 .

[0235] The removable connection between the second insulating member 235 and the connecting member 232 may be, but is not limited to, a threaded connection or a snap-fit ​​connection. Since the pole member 23 is generally small, this connection between the second insulating member 235 and the connecting member 232 is easy to operate and convenient for removal and replacement, thereby reducing manufacturing costs.

[0236] The limiting portion 241 may refer to a structure or component that can limit the position of the pole body 231. "The limiting portion 241 extends toward one side of the pole body 231 and is located on the side of the second insulating member 235 close to the electrode component 22" can be understood as, the limiting portion 241 may be, but not limited to, L-shaped or arc-shaped. For example, referring to Figure 14 and Figure 16 , the limiting portion 241 is L-shaped.

[0237] In the above solution, the second insulating member 235 and the connecting member 232 are detachable, facilitating maintenance or replacement. The third insulating member 24, through the limiting portion 241, can limit the second insulating member 235 on the side closest to the electrode member 22. This can support the second insulating member 235 when the second insulating member 235 and the connecting member 232 are separated, reducing the risk of the second insulating member 235 falling into the housing member 21 and causing insulation failure. This ensures that the pole member 23 has stable and reliable insulation, improves the reliability of the pole member 23, and thus helps improve the reliability of the battery cell 20.

[0238] In some embodiments of the present application, reference is made to Figure 10 The side of the vertical arm 2321 facing away from the pole body 231 is connected to the first wall 201, and a protrusion 2302 is provided on the peripheral side of the pole body 231. The vertical arm 2321 has a stop end 2321d facing the inner side of the shell component 21, and the stop end 2321d is connected to the protrusion 2302 through the first insulating member 233.

[0239] In the above technical solution, the connecting component 232 may only include a vertical arm 2321, which is connected to the first wall 201, and the abutting end 2321d of the vertical arm 2321 near the inner side of the shell component 21 can pass through the abutting protrusion 2302 of the first insulating member 233. In this way, when the battery cell 20 is subjected to external forces, the vertical arm 2321 can limit the terminal body 231, reducing the probability of the terminal body 231 being pulled out of the shell component 21. The above-mentioned connecting component 232 has a relatively simple structure and good manufacturability, which can reduce costs. It can also reduce the size of the connecting component 232, making it suitable for thin battery cells 20. It can also reduce the overall weight of the terminal component 23, which is conducive to improving the energy density of the battery cell 20.

[0240] In some embodiments of the present application, reference is made to Figure 3 、 Figure 11 、 Figure 13 and Figure 15 The shell component 21 includes a shell 211 and an end cover 212 . The shell 211 is provided with an opening. The end cover 212 is covered on the opening and is provided with a first wall 201 .

[0241] The shell 211 may refer to the main body of the shell component 21 , which has a cavity inside and the opening communicates with the cavity.

[0242] The end cap 212 may be a plate-shaped component. The end cap 212 is provided on the opening by covering to form a closed accommodation space inside the shell component 21 for placing the electrode component 22 and the electrolyte.

[0243] In the above technical solution, a first wall 201 can be provided on the end cap 212 of the shell component 21, so that the pole component 23 can be first installed on the end cap 212 and then installed on the shell 211 together with the end cap 212. This method can reduce the difficulty of assembling the pole component 23, improve manufacturability, and help improve product yield. Moreover, because the thickness of the end cap 212 is generally greater than the thickness of the shell 211, the end cap 212 can provide better support for the pole component 23 and better restrain the pole component 23, reducing the chance of deformation or damage to the pole component 23 due to large forces. Secondly, the pole component 23 can also be more easily sealed on the end cap 212 by the sealing ring, reducing the risk of electrolyte leakage. In other words, the above solution can improve the reliability of the pole component 23 and the reliability of the battery cell 20.

[0244] In some embodiments of the present application, reference is made to Figure 22 The shell component 21 includes a shell 211 and an end cover 212. The shell 211 is provided with an opening and a first wall 201. The end cover 212 is covered on the opening.

[0245] In the above technical solution, the housing 211 of the housing component 21 can be provided with a first wall 201, thereby allowing the pole component 23 to be directly mounted on the housing 211. Since the pole component 23 does not occupy the space of the end cover 212, the spatial layout inside the housing 211 can be more compact, which is conducive to improving the energy density of the battery cell 20. The above solution also reduces the structural complexity of the end cover 212 and the difficulty of assembling the end cover 212, thereby reducing the occurrence of electrolyte leakage due to improper assembly of the end cover 212, thereby improving the reliability of the battery cell 20.

[0246] Reference Figure 17 and Figure 18 The battery cell 20 provided in the embodiment of the present application includes: a shell component 21, an electrode component 22 and a pole component 23.

[0247] The pole component 23 is generally racetrack-shaped and includes a pole body 231 and a welding ring. The welding ring is arranged circumferentially around the pole body 231 and comprises a vertical arm 2321 and a horizontal arm 2322. The vertical arm 2321 is provided with a plurality of through-holes around the circumference of the pole body 231. The pole body 231 is also provided with a plurality of protruding teeth, each corresponding to a plurality of through-holes. The protruding teeth extend into the through-holes, forming a mutually mating engagement structure between the pole body 231 and the vertical arm 2321. A plastic component is injection-molded between the vertical arm 2321 and the pole body 231 to provide insulation between the vertical arm 2321 and the pole body 231, as well as between the protruding teeth and the through-holes.

[0248] In which, the cross arm 2322 can be installed in the mounting hole 201a of the first wall 201 of the shell component 21 and welded to the first wall 201; or, the pole component 23 also includes an adapter plate, the cross arm 2322 is welded to the adapter plate, and the adapter plate is installed in the mounting hole 201a of the first wall 201 of the shell component 21 and welded to the first wall 201.

[0249] Reference Figure 19 and Figure 20 Another embodiment of the present application provides a battery cell 20 , and the structure of the battery cell 20 of this embodiment is substantially the same as that of the battery cell 20 of the above embodiment, except that the pole component 23 is generally circular.

[0250] The embodiment of the present application further provides a battery device 100 , comprising a battery cell 20 as described in any of the above items.

[0251] In the above technical solution, since the terminal component 23 of the battery cell 20 has a high structural strength, the terminal component 23 can withstand a large external force during the use of the battery device 100, and the probability of rupture or damage is higher. The battery cell 20 can have a higher reliability, thereby improving the reliability of the battery device 100.

[0252] The embodiment of the present application further provides an electrical device 1000 , comprising the battery cell 20 as described above, or the battery device 100 as described above.

[0253] In the above technical solution, since the terminal component 23 of the battery cell 20 has a high structural strength, the terminal component 23 can withstand a large external force and has a higher probability of rupture or damage. 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.

[0254] 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.

[0255] 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: The housing component includes a first wall, wherein the first wall is provided with a mounting hole; an electrode component housed in the housing component; a pole component, mounted at the mounting hole, and comprising a pole body, a connecting component, and a first insulating member, wherein 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 via the first insulating member; The connecting component includes a vertical arm extending in a direction away from the first wall. Along the thickness direction of the first wall, a projection of the vertical arm on the first wall at least partially overlaps with a projection of the pole body on the first wall.

2. The battery cell according to claim 1, wherein: Along the thickness direction of the first wall, the projection of the vertical arm on the first wall has a first inner contour and a first outer contour; Along the thickness direction of the first wall, the projection of the pole body on the first wall has a second outer contour; At least a portion of the first inner contour is located within the second outer contour.

3. The battery cell according to claim 2, characterized in that: At least a portion of the second outer contour is located within the first outer contour.

4. The battery cell according to claim 3, characterized in that A portion of the first inner contour is located within the first outer contour, and the entire second outer contour is located within the first outer contour.

5. The battery cell according to any one of claims 1 to 4, characterized in that: The vertical arm is arranged around the circumference of the pole body, a concave portion is provided on the circumferential side of one of the vertical arm and the pole body, and a convex portion is provided on the circumferential side of the other of the vertical arm and the pole body, at least a portion of the convex portion extends into the concave portion, and the two are insulated and matched by the first insulating member.

6. The battery cell according to any one of claims 1 to 5, characterized in that: The connecting component and the first wall are integrally formed.

7. The battery cell according to any one of claims 1 to 6, characterized in that: The vertical arm is perpendicular to the first wall.

8. The battery cell according to any one of claims 1 to 7, characterized in that: The connecting component includes a transverse arm, which surrounds the pole body and connects the vertical arm and the first wall. The transverse arm and the vertical arm are arranged at an angle.

9. The battery cell according to any one of claims 1 to 8, characterized in that: The connecting component includes a transverse arm and an adapter. The transverse arm surrounds the pole body and connects the vertical arm. The transverse arm and the vertical arm are arranged at an angle. The adapter surrounds the pole body and connects the transverse arm and the first wall.

10. The battery cell according to claim 8 or 9, characterized in that: The horizontal arm is perpendicular to the vertical arm.

11. The battery cell according to claim 5, characterized in that The pole body is provided with the convex portion, the vertical arm is provided with the concave portion, the concave portion penetrates the vertical arm toward the direction close to the electrode component, and an opening is formed on a side of the vertical arm close to the electrode component.

12. The battery cell according to claim 11, characterized in that The connecting component includes a transverse arm, the transverse arm is connected to the vertical arm and is provided with an avoidance groove, and the avoidance groove is connected to the recess.

13. The battery cell according to claim 12, characterized in that: The avoidance groove passes through the cross arm in a direction away from the electrode component.

14. The battery cell according to claim 13, characterized in that The first insulating member comprises: An outer ring portion wrapped around a side of the vertical arm facing away from the pole body; An inner ring portion is provided between the vertical arm and the pole body and is connected to the outer ring portion; a first extension portion, disposed between the concave portion and the convex portion and connecting the outer ring portion and the inner ring portion; The second extension portion is disposed in the avoidance groove and connects the outer ring portion and the inner ring portion.

15. The battery cell according to claim 14, characterized in that The outer ring portion, the inner ring portion, the first extension portion and the second extension portion are an integral injection molded part.

16. The battery cell according to claim 14, characterized in that The inner ring portion, the first extension portion and the second extension portion are an integral injection molded part, and the outer ring portion is injection molded and connected to the inner ring portion.

17. The battery cell according to any one of claims 1 to 16, characterized in that: The connecting component includes a cantilever, which is provided at one end of the vertical arm away from the first wall and extends toward a side close to the pole body. The cantilever is pressed against the pole body through the first insulating member.

18. The battery cell according to any one of claims 1 to 17, characterized in that: The pole component includes a sealing member surrounding the pole body and sealing between the pole body and the connecting member.

19. The battery cell according to claim 18, characterized in that The sealing member and the first insulating member are integrally formed.

20. The battery cell according to any one of claims 1 to 19, characterized in that: The pole component includes a second insulating component. The second insulating component surrounds the pole body, covers a side of the connecting component facing the inside of the shell component, and is connected to the connecting component.

21. The battery cell according to claim 20, characterized in that One of the second insulating member and the connecting member is provided with a clamping portion, and the other is provided with a clamped portion, and the clamped portion and the clamping portion are detachably connected.

22. The battery cell according to claim 20 or 21, characterized in that: The second insulating member and the first insulating member are integrally formed.

23. The battery cell according to any one of claims 20 to 22, characterized in that: The pole component includes a sealing member, which surrounds the pole body and seals between the pole body and the connecting member. The sealing member, the first insulating member, and the second insulating member are an integrally formed member.

24. The battery cell according to any one of claims 20 to 23, characterized in that: The battery cell includes a third insulating member, which covers the side of the first wall facing the inside of the shell component. The third insulating member is provided with a matching hole, which corresponds to the mounting hole and serves as a reference surface parallel to the first wall. The edge of the matching hole on the orthographic projection of the reference surface is located within the orthographic projection of the second insulating member on the reference surface.

25. The battery cell according to claim 24, characterized in that The second insulating member and the connecting member are detachably connected. The third insulating member is provided with a limiting portion, which extends toward one side of the pole body and is located on a side of the second insulating member close to the electrode member.

26. The battery cell according to any one of claims 1 to 4, characterized in that: The side of the vertical arm facing away from the pole body is connected to the first wall. A convex portion is provided on the peripheral side of the pole body. The vertical arm has a stop end facing the inner side of the shell component. The stop end is connected to the convex portion through the first insulating member.

27. The battery cell according to any one of claims 1 to 26, characterized in that: The shell component includes a shell and an end cover. The shell is provided with an opening. The end cover is arranged to cover the opening and is provided with the first wall.

28. The battery cell according to any one of claims 1 to 26, characterized in that: The shell component includes a shell and an end cover. The shell is provided with an opening and the first wall. The end cover is provided to cover the opening.

29. A battery device, characterized in that: The invention comprises the battery cell according to any one of claims 1 to 28.

30. An electrical device, characterized in that: The method comprises the battery cell according to any one of claims 1 to 28, or the battery device according to claim 29.

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