Battery cell, battery device, and electric device

Abstract

A battery monomer (20), a battery device (100) and a power consumption device (1000), the battery monomer (20) comprises: a shell component (21) comprising a first wall (201) provided with a mounting hole (201a); an electrode component (22) accommodated in the shell component (21); a pole component (23) mounted at the mounting hole (201a) and comprising a pole body (231), a connecting component (232) and a first insulation piece (233), the pole body (231) is connected with the electrode component (22), the connecting component (232) is connected with the first wall (201), and the pole body (231) is connected and matched with the first insulation piece (233) in an insulated manner; wherein the connecting component (232) comprises a vertical arm (2321) extending away from the first wall (201), and a projection of the vertical arm (2321) on the first wall (201) at least partially overlaps with a projection of the pole body (231) on the first wall (201) in a thickness direction of the first wall (201).

Description

Battery cell, battery device and electric device TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery cell, a battery device and an electric device. BACKGROUND

[0002] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable important role. The battery is composed of a box body and a plurality of battery cells contained in the box body. Among them, as a core component of new energy vehicles, the battery has high requirements in terms of safety and service life. However, the pole of the battery cell needs to be connected with the adjacent battery cell or other power connection components, which causes the pole to be easily affected by external forces during the operation of the battery cell, and affects the reliability of the pole, and further affects the reliability of the battery cell.

[0003] SUMMARY

[0004] The embodiments of the present application provide a battery cell, a battery device and an electric device, which can improve the reliability of the battery cell, the battery device and the electric device.

[0005] In a first aspect, the embodiments of the present application provide a battery cell, comprising: a housing component comprising a first wall, the first wall being provided with a mounting hole; an electrode component accommodated in the housing component; a pole component mounted at the mounting hole and comprising a pole body, a connecting component and a first insulating piece, the pole body being connected with the electrode component, the connecting component being connected with the first wall and being in insulated connection with the pole body through the first insulating piece; wherein the connecting component comprises a vertical arm, the vertical arm extending 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 along the thickness direction of the first wall.

[0006] In the battery cell with the above structure, since the projection of the vertical arm on the first wall at least partially overlaps the projection of the pole body on the first wall along the thickness direction of the first wall, the vertical arm can limit the pole body, and since the vertical arm has high strength along the thickness direction of the first wall and is not easy to deform, the vertical arm can provide strong support and better limiting effect. When the pole body is subjected to an external force away from the first wall, the vertical arm can press against the pole body, so that the pole component as a whole has high structural strength, thereby reducing the probability of the pole body being pulled out of the housing component. In addition, the projection of the vertical arm on the first wall at least partially overlaps the projection of the pole body on the first wall, which can also reduce the probability of the pole body and the connecting component shaking, deforming or displacing when they are matched, and improve the installation stability of the pole body. That is, the above structure can improve the reliability of the pole component, and further improve the reliability of the battery cell.

[0007] In some embodiments of the present application, a projection of the stand arm on the first wall along the thickness direction of the first wall has a first inner contour and a first outer contour; a projection of the pole body on the first wall along the thickness direction of the first wall has a second outer contour; at least part of the first inner contour is located within the second outer contour.

[0008] In the above technical solution, under the premise that the stand arm can limit the pole body, the positional relationship between the first inner contour of the stand arm and the second outer contour of the pole body can be flexibly selected according to different requirements, thereby reducing the processing difficulty of the pole body and the stand arm, and improving the manufacturability of the pole component. On the other hand, the above solution can also improve the space utilization rate between the stand arm and the pole body. When part of the first inner contour is located within the second outer contour, a more compact layout can be achieved in a limited space, the gap between the components is fully utilized, and the overall structure is more compact. When the first inner contour is entirely located within the second outer contour, the space utilization rate can be further maximized, which is conducive to reducing the volume of the pole component, and further reducing the volume of the battery monomer and improving the battery energy density.

[0009] In some embodiments of the present application, at least part of the second outer contour is located within the first outer contour.

[0010] In the above technical solution, the second outer contour of the pole body can be partially or entirely located within the first outer contour of the stand arm, thereby improving the structural design flexibility of the stand arm and the pole body. When part of the second outer contour is located within the first outer contour, the relative positional relationship between the pole body and the stand arm can be flexibly adjusted according to requirements, different space limitations and functional requirements are adapted to, and diversified design of the pole component is possible. When the second outer contour is entirely located within the first outer contour, the positional distribution of the pole body and the stand arm can be more compact, which is conducive to reducing the volume of the pole component, saving the installation space of the pole component, thereby reducing the volume of the battery monomer and improving the battery energy density.

[0011] In some embodiments of the present application, part 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.

[0012] In the above technical solution, part of the first inner contour of the stand arm is located within the first outer contour of the stand arm, which can form a certain spatial hierarchy in the structure of the stand arm. Under the premise that the stand arm can limit the pole body, the space between the stand arm and the pole body is integrated, the space utilization rate is improved, the stand arm and the pole body are more compact, which is conducive to further reducing the volume of the battery monomer and improving the battery energy density.

[0013] The second outer contour of the pole body is entirely located within the first outer contour of the stand arm. On the one hand, the appearance of the stand arm as a whole can be relatively flat, and the pole body does not protrude from the outer side of the stand arm, which is conducive to making the pole component as a whole relatively regular, facilitating processing and manufacturing, and reducing the size of the pole component and improving the energy density of the battery. On the other hand, when the first insulating piece covers the outer side of the stand arm, the above scheme is also conducive to keeping the thickness of the first insulating piece on the outer side of the stand arm overall constant, which can reduce the problem of stress concentration of the first insulating piece and is conducive to reducing the risk of electrical breakdown. It can be seen that the above technical scheme is conducive to balanced control of the size, appearance, manufacturability and other properties of the pole component under the premise that the stand arm can limit the pole body.

[0014] In some embodiments of the present application, the stand arm is arranged around the pole body in the circumferential direction, the stand arm and the pole body are arranged in a nested manner, and the stand arm and the pole body are insulated by the first insulating piece.

[0015] In the above technical scheme, the stand arm and the pole body can be nested by the convex portion and the concave portion, thereby increasing the structural strength of the stand arm and the pole body as a whole. When the pole body is subjected to an external force in a direction away from the first wall, the nested structure formed by the stand arm and the pole body can better withstand stress, which is conducive to reducing the probability of deformation or damage, and further reducing the probability of the pole body being pulled out of the stand arm. The stand arm and the pole body can also be mechanically locked by the convex portion and the concave portion, making the connection between the stand arm and the pole body more secure, which is conducive to maintaining a relatively stable positional relationship between the stand arm and the pole body when the battery monomer is subjected to vibration, impact or other external forces, and reducing the risk of loosening or displacement. It can be seen that the stand 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 monomer.

[0016] In some embodiments of the present application, the connecting component and the first wall are integrally formed.

[0017] In the technical scheme, the vertical arm of the connecting component is used to limit the pole body, the connecting component and the first wall of the shell component are integrally formed, no connecting gap exists between the connecting component and the first wall, the weak point between the connecting component and the first wall is reduced, the overall structural strength of the connecting component and the shell component is higher and more stable, the stress can be better borne when the battery monomer is subjected to external impact, extrusion or vibration, the risk of deformation or damage is reduced, the limiting reliability of the vertical arm to the pole body is improved, and the installation stability and reliability of the pole body are further improved. In addition, the connecting component and the first wall are integrally formed, no gap exists between the connecting component and the first wall, the potential leakage path in the battery monomer is reduced, the sealing performance of the battery monomer is improved, and the reliability of the battery monomer is further improved. Moreover, the connecting component and the first wall are integrally formed, the assembly steps are reduced, the complexity in the manufacturing process of the battery monomer is reduced, the production efficiency is improved, the cost is reduced, the incidence of quality problems caused by poor connection of the connecting component and the shell component is reduced, and the consistency and quality stability of the battery monomer are improved.

[0018] In some embodiments of the present application, the vertical arm is perpendicular to the first wall.

[0019] In the technical scheme, the vertical structure formed by the vertical arm and the first wall of the shell component can provide more stable support for the pole body, the pole body can be kept in a relatively stable position, the force from the pole body can be better borne when the battery monomer is subjected to external force, the reliability of the pole component is improved, and the reliability of the battery monomer is further improved. In addition, the structure in which the vertical arm is perpendicular to the first wall is relatively simple, easy to manufacture and process, and the consistency and quality stability of the pole component are improved.

[0020] In some embodiments of the present application, the connecting component comprises a horizontal arm, the horizontal arm 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.

[0021] In the technical scheme, the connecting component with the above structure is used, the horizontal arm can prevent the vertical arm from directly contacting the first wall, that is, the horizontal arm can provide a position connected with the first wall, the horizontal arm is mainly used to connect the first wall and can provide suitable operation space, and the connection of the horizontal arm and the first wall is facilitated. On the other hand, the connecting component with the above structure can reduce the influence of the connection of the connecting component and the first wall on the vertical arm, reduce the probability of rupture or damage of the vertical arm, improve the stability and reliability of the vertical arm, and improve the reliability of the structure formed between the vertical arm and the pole body.

[0022] In some embodiments of the present application, the connecting component comprises 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, and the adapter surrounds the pole body and connects the horizontal arm and the first wall.

[0023] In the above technical solution, since the connecting component includes not only the vertical arm for limiting the pole body, but also the adapter connected with the first wall and the horizontal arm connecting the vertical arm and the adapter, the whole pole component can be assembled outside the shell component, and then connected with the first wall through the adapter, without assembling the parts of the pole component on the shell component, so that the assembly difficulty of the pole component is reduced, the installation and cooperation of the pole component and the shell component are facilitated, and the installation time and cost are saved.

[0024] Secondly, in the conventional pole component structure, the pole body needs to press on the sealing component placed on the first wall of the shell component to realize the sealing of the shell component, but such a sealing method requires a large pressure applied by the pole component to the first wall to ensure the required pre-tightening force, which easily causes deformation or damage of the first wall when the thickness of the shell component is thin. In the above structure of the application, 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 requirement between the adapter and the first wall is reduced, and a large force does not need to be applied to the pole component to meet the sealing requirement at the connection between the adapter and the first wall, so that the stress deformation problem of the first wall is improved, the wall thickness of the shell component is reduced, the weight of the battery monomer is reduced, and the battery energy density is improved.

[0025] In some embodiments of the 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 have higher structural strength, better withstand the force from the pole body when the battery monomer is subjected to external force, improve the reliability of the pole component, and further improve the reliability of the battery monomer. The structure that the horizontal arm is 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 pole component.

[0026] In some embodiments of the application, the pole body is provided with a protrusion, the vertical arm is provided with a recess, and the recess penetrates the vertical arm in a direction close to the electrode component and forms an opening on a side of the vertical arm close to the electrode component.

[0027] In the above technical solution, since the protrusion of the pole body is to be installed in cooperation with the recess of the vertical arm, by penetrating the recess through the vertical arm in a direction close to the electrode component and forming an opening, the protrusion can enter the recess from the opening below the vertical arm, facilitating the cooperation of the pole body and the vertical arm, reducing the installation difficulty of the pole body and the vertical arm, improving the assembly efficiency, and reducing the cost. The recess penetrates the vertical arm to the side close to the electrode component, which also reduces the weight of the vertical arm, thereby reducing the weight of the pole component and the weight of the battery monomer, and improving the battery energy density.

[0028] In some embodiments of the present application, the connecting component comprises a cross arm connected to the upright arm and provided with an avoiding slot communicating with the recess.

[0029] In the above technical solution, in the process of installing the pole body through the cooperation of the convex part and the recess of the upright arm, the avoiding slot can provide a lateral movement space for the convex part of the pole body, that is, provide a redundant space in the direction parallel to the first wall during the installation of the pole body and the cross arm, provide a certain fault tolerance for the cooperation of the convex part and the recess, and is beneficial to reduce the installation difficulty of the pole body and the upright arm, save the installation time, and improve the assembly efficiency. Moreover, the avoiding slot can reduce the weight of the cross arm, reduce the weight of the battery monomer, and improve the battery energy density.

[0030] In some embodiments of the present application, the avoiding slot penetrates the cross arm in a direction away from the electrode component.

[0031] In the above solution, the avoiding slot is a hole penetrating the cross arm, which can realize visual assembly of the convex part of the pole body and the recess of the upright arm during installation and cooperation, reduce the assembly difficulty, save the assembly time, and further reduce the weight of the cross arm and the overall weight of the pole component, thereby reducing the weight of the battery monomer and further improving the battery energy density.

[0032] In some embodiments of the present application, the first insulating piece comprises: an outer ring portion wrapped on a side of the upright arm away from the pole body; an inner ring portion arranged between the upright arm and the pole body and connected to the outer ring portion; a first extension portion arranged between the recess and the convex part and connected to the outer ring portion and the inner ring portion; and a second extension portion arranged in the avoiding slot and connected to the outer ring portion and the inner ring portion.

[0033] In the above technical solution, the first insulating piece with the above structure can insulate the outer side of the upright arm by the outer ring portion, insulate between the upright arm and the pole body by the inner ring portion, insulate between the recess and the convex part by the first extension portion, and insulate between the pole body and the avoiding slot by the second extension portion. Thus, the first insulating piece can have a more comprehensive and sufficient insulation effect, reduce the risk of electrical breakdown of the pole component, and also play a certain sealing role while playing an insulation role, thereby reducing the probability of leakage points on the pole component, improving the reliability of the pole component, and improving the reliability of the battery monomer.

[0034] 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 one-piece injection molded parts.

[0035] In the technical solution, the first insulating piece is an integral injection molding piece, which can prevent connection gaps from occurring 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. Moreover, the first insulating piece is an integral injection molding piece, which can improve the overall structural strength of the first insulating piece, reduce the probability of deformation or damage of the battery monomer when subjected to external forces, improve the reliability of the first insulating piece, and further improve the reliability of the battery monomer. Furthermore, the first insulating piece is an integral injection molding piece, which has a relatively simple process and can reduce costs and improve production capacity.

[0036] In some embodiments of the present application, the inner ring portion, the first extension portion and the second extension portion are integral injection molding pieces, and the outer ring portion is injection molded and connected to the inner ring portion.

[0037] In the technical solution, the first insulating piece is a split structure piece, which can be injection molded to form the inner ring portion, the first extension portion and the second extension portion first, and then injection molded to form the outer ring portion connected to the inner ring portion, the first extension portion and the second extension portion. This method has high operational flexibility, can adapt to different needs and different manufacturing processes, facilitates assembly and reduces costs.

[0038] 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 the side close to the pole body. The cantilever is pressed against the pole body by the first insulating piece.

[0039] In the technical solution, the connecting component not only includes the vertical arm cooperating with the pole body, but also includes the cantilever connected to the vertical arm and extending toward the side close to the pole body. Thus, the cantilever can limit the side of the pole body away from the first wall. After the vertical arm and the cantilever are connected to the pole body by the first insulating piece, a more stable and reliable structure can be formed, 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 of the pole body due to external forces, improving the reliability of the pole component, and further improving the reliability of the battery monomer. The first insulating piece 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 circuit.

[0040] In some embodiments of the present application, the pole component includes a sealing piece, which surrounds the pole body and is sealed between the pole body and the connecting component.

[0041] In the technical scheme, the sealing element is arranged between the pole post body and the connecting component, so that the sealing property between the pole post body and the connecting component is improved, the pole post component has self-sealing property, and the sealing property between the pole post component and the shell component is improved, thereby improving the reliability of the battery monomer.

[0042] In some embodiments of the present application, the sealing element and the first insulating element are integrally formed.

[0043] In the technical scheme, the above structure can reduce the process manufacturing difficulty of the assembly composed of the sealing element and the first insulating element, simplify the manufacturing process, reduce the cost, and improve the yield. Moreover, the sealing element and the first insulating element are integrally formed, so that there is no gap between the sealing element and the first insulating element, the leakage points on the pole post component can be reduced, the sealing property of the pole post component can be further improved, and the reliability of the battery monomer is improved.

[0044] In some embodiments of the present application, the pole post component includes a second insulating element, the second insulating element surrounds the pole post body and covers a side of the connecting component facing the shell component, and is connected with the connecting component.

[0045] Since the pole post component generally needs to be welded with the shell component in the conventional pole post structure, the connecting component of the present application is generally made of metal to facilitate welding with the shell component. In the technical scheme, the second insulating element can play an insulating role on the side of the pole post body close to the electrode component, so that the risk of short circuit caused by the contact between the electrode component and the connecting component during the connection of the pole post body and the electrode component can be reduced. Even if the connecting component is not a metal component, the second insulating element can also help to reduce the probability of short circuit caused by the contact between the electrode component and the first wall. That is, the above scheme can improve the reliability of the battery monomer during the production process, and is beneficial to improve the product yield.

[0046] In some embodiments of the present application, one of the second insulating element and the connecting component 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 scheme, on the one hand, this detachable structure is relatively simple and easy to install or detach, which can improve the assembly efficiency; on the other hand, this detachable structure facilitates the replacement or repair of the damaged component, which can reduce the use cost.

[0047] In some embodiments of the present application, the second insulating element and the first insulating element are integrally formed.

[0048] In the technical solution, the second insulating member and the first insulating member are integrally formed, which reduces the forming process of the second insulating member and the first insulating member, reduces the manufacturing steps, and improves the production efficiency. In addition, the second insulating member and the first insulating member are integrally formed, which eliminates the gap between the second insulating member and the first insulating member, reduces the leakage points on the pole part, and further improves the sealing performance of the pole part and the reliability of the battery cell.

[0049] In some embodiments of the present application, the pole part comprises a sealing member, the sealing member surrounds the pole body and is sealed between the pole body and the connecting part, and the sealing member, the first insulating member and the second insulating member are integrally formed.

[0050] In the technical solution, the sealing member, the first insulating member and the second insulating member can be integrally formed to form one part, which simplifies the forming process of the sealing member, the first insulating member and the second insulating member, reduces the manufacturing difficulty, and thus reduces the cost and improves the production efficiency. In addition, the sealing member, the first insulating member and the second insulating member can form a stable and reliable structure, which reduces the risk of deformation or damage of the sealing member, the first insulating member and the second insulating member when the battery cell is subjected to external action, improves the sealing performance and insulation performance of the pole part, and further improves the reliability of the pole part and the battery cell. The sealing member, the first insulating member and the second insulating member are integrally formed, which eliminates the gap between the three, further reduces the leakage points on the pole part, and further improves the sealing performance and insulation performance of the pole part, which is conducive to further improving the reliability of the battery cell.

[0051] In some embodiments of the present application, the battery cell comprises a third insulating member, the third insulating member covers one side of the first wall facing the housing part, the third insulating member is provided with a matching hole corresponding to the mounting hole, and a reference plane parallel to the first wall is provided, and the edge of the projection of the matching hole on the reference plane is located in the projection of the second insulating member on the reference plane.

[0052] In the above solution, the third insulating member can insulate the side of the first wall close to the electrode part, which reduces the risk of short circuit caused by contact between the electrode part and the housing part when the electrode part enters the housing or the electrode part is connected with the pole part. The matching hole corresponds to the mounting hole, which provides a passage for the connection of the pole body and the electrode part, and facilitates the connection of the pole body and the electrode part. The projections of the second insulating member and the third insulating member on the reference plane can partially overlap, which improves the insulation performance of the connection position of the second insulating member and the third insulating member, reduces the probability of gap, and improves the reliability of the battery cell.

[0053] In some embodiments of the present application, the second insulating member and the connecting part are detachably connected, and the third insulating member is provided with a limiting portion extending towards one side of the pole body and located at the side of the second insulating member close to the electrode part.

[0054] In the above scheme, the second insulating part and the connecting part are detachable, facilitating maintenance or replacement. The third insulating part can play a limiting role on the side of the second insulating part close to the electrode part through the limiting part, can hold the second insulating part when the second insulating part and the connecting part are separated, and can reduce the risk of insulation failure caused by the second insulating part falling into the housing part. The pole post part can have stable and reliable insulation, improving the reliability of the pole post part, and further improving the reliability of the battery monomer.

[0055] In some embodiments of the present application, the upright arm is connected to the first wall on the side away from the pole post body, the peripheral side of the pole post body is provided with a protrusion, and the upright arm has a stop end facing the inner side of the housing part, and the stop end is connected to the protrusion through the first insulating part.

[0056] In the above technical scheme, the connecting part can only include the upright arm, the upright arm is connected to the first wall, and the stop end of the upright arm close to the inner side of the housing part can stop the protrusion through the first insulating part. In this way, when the battery monomer is subjected to external force, the upright arm can limit the pole post body, reducing the probability of the pole post body being pulled out of the housing part. The structure of the above connecting part is relatively simple, the manufacturability is relatively good, the cost can be reduced, the size of the connecting part can be reduced, it can be applied to a battery monomer with a thin width, the overall weight of the pole post part can be reduced, and the energy density of the battery monomer can be improved.

[0057] In some embodiments of the present application, the housing part includes a housing and an end cover, the housing is provided with an opening, the end cover is arranged on the opening, and the end cover is provided with the first wall.

[0058] In the above technical scheme, the first wall can be arranged on the end cover of the housing part. In this way, the pole post part can be first mounted on the end cover, and then mounted on the housing together with the end cover. This way can reduce the assembly difficulty of the pole post part, improve the manufacturability, and improve the product yield. In addition, since the thickness of the end cover is usually greater than the thickness of the housing, the end cover can provide better support for the pole post part and better constrain the pole post part, reducing the probability of deformation or damage of the pole post part due to large stress. In addition, the pole post part is also easier to be sealed by the sealing ring on the end cover, reducing the risk of electrolyte leakage. That is, the above scheme can improve the reliability of the pole post part and the reliability of the battery monomer.

[0059] In some embodiments of the present application, the housing part includes a housing and an end cover, the housing is provided with an opening, the end cover is arranged on the opening, and the end cover is provided with the first wall.

[0060] In the technical solution, the first wall is arranged on the shell of the shell member, and thus the pole member can be directly mounted on the shell. Since the pole member does not occupy the space of the end cover, the space layout inside the shell can be more compact, and the energy density of the battery monomer can be improved. The technical solution can also reduce the structural complexity of the end cover, reduce the assembly difficulty of the end cover, and thus reduce the electrolyte leakage caused by improper assembly of the end cover, and further improve the reliability of the battery monomer.

[0061] In a second aspect, the embodiments of the present application also provide a battery device comprising the battery monomer according to any one of the preceding embodiments.

[0062] In the technical solution, the pole member of the battery monomer has high structural strength, and can withstand a large external force during use of the battery device, and has a high probability of rupture or damage. Thus, the battery monomer can have high reliability, and the reliability of the battery device can be improved.

[0063] In a third aspect, the embodiments of the present application also provide a power consumption device comprising the battery monomer according to any one of the preceding embodiments, or the battery device according to the preceding embodiments.

[0064] In the technical solution, the pole member of the battery monomer has high structural strength, and can withstand a large external force, and has a high probability of rupture or damage. Thus, the battery monomer can have high reliability, and the battery device using the battery monomer also has high reliability, and thus the reliability of the power consumption device comprising the battery monomer or the battery device can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0065] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and should not be considered as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0066] FIG. 1 is a structural schematic diagram of a power consumption device as a vehicle according to some embodiments of the present application;

[0067] FIG. 2 is an exploded view of a battery device according to some embodiments of the present application;

[0068] FIG. 3 is a schematic diagram of the internal structure of a battery monomer according to some embodiments of the present application;

[0069] FIG. 4 is a sectional view of FIG. 3 along line A-A;

[0070] FIG. 5 is a top view of a pole member according to some embodiments of the present application;

[0071] Fig. 6 is a sectional view of Fig. 5 taken along line B-B;

[0072] Fig. 7 is a structural schematic diagram of the pole part in the embodiment of Fig. 6 without the first insulating member;

[0073] Fig. 8 is a sectional view of Fig. 5 taken along line C-C;

[0074] Fig. 9 is a structural schematic diagram of the pole part in the embodiment of Fig. 8 without the first insulating member;

[0075] Fig. 10 is a partial structural schematic diagram of a battery cell according to some embodiments of the present application;

[0076] Fig. 11 is a perspective structural schematic diagram of a battery cell according to some embodiments of the present application;

[0077] Fig. 12 is a partial view of an exploded view of a battery cell according to some embodiments of the present application;

[0078] Fig. 13 is a schematic diagram of an internal structure of a battery cell according to some embodiments of the present application;

[0079] Fig. 14 is a partial enlarged schematic diagram of I of Fig. 13;

[0080] Fig. 15 is a schematic diagram of an internal structure of a battery cell according to some embodiments of the present application;

[0081] Fig. 16 is a partial enlarged schematic diagram of II of Fig. 15;

[0082] Fig. 17 is a perspective structural schematic diagram of a pole part according to some embodiments of the present application;

[0083] Fig. 18 is a perspective structural schematic diagram of a connecting part according to some embodiments of the present application;

[0084] Fig. 19 is a perspective structural schematic diagram of a pole part according to some other embodiments of the present application;

[0085] Fig. 20 is an exploded view of the pole part according to the embodiment of Fig. 19;

[0086] Fig. 21 is a schematic diagram of an internal structure of a pole part according to some other embodiments of the present application;

[0087] Fig. 22 is a perspective structural schematic diagram of a battery cell according to some other embodiments of the present application.

[0088] Fig. 22 is a perspective structural schematic diagram of a battery cell according to some other embodiments of the present application.

[0089] 1000, an electrical device;

[0090] 100, a battery device;

[0091] 10, box; 11, first box body; 12, second box body;

[0092] 20, battery cell;

[0093] 21, housing component;

[0094] 201, first wall; 201a, mounting hole;

[0095] 211, housing; 212, end cover;

[0096] 22, electrode component;

[0097] 23, pole component;

[0098] 231, pole body; 231a, second outer contour;

[0099] 232, connecting component; 2321, vertical arm; 2321a, first inner contour; 2321b, first outer contour; 2321c, opening; 2321d, abutting end; 2322, horizontal arm; 2322a, avoiding slot; 2323, adapter; 2324, cantilever;

[0100] 233, first insulation; 2331, outer ring portion; 2332, inner ring portion; 2333, first extension; 2334, second extension;

[0101] 234, sealing component;

[0102] 235, second insulation;

[0103] 2301, recess; 2302, protrusion; 2303, clamping portion; 2304, clamped portion;

[0104] 24, third insulation; 24a, mating hole; 241, limiting portion;

[0105] 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0106] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0107] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an overly literal sense unless expressly so defined herein.

[0108] Reference throughout this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment.

[0109] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0110] The term "and / or" in this application is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0111] In the embodiments of the present application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are only exemplary and should not constitute any limitation on the present application.

[0112] "Multiple" appearing in the present application means two or more (including two).

[0113] In this application, the battery cell can include lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-hydrogen battery, nickel-cadmium battery, lead-acid battery, etc. The embodiments of the present application are not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The embodiments of the present application are not limited thereto. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cell, square battery cell and soft package battery cell, and the embodiments of the present application are not limited thereto.

[0114] The battery apparatus mentioned in the embodiments of the present application can refer to one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component. In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0115] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0116] In some embodiments, the battery apparatus can be a battery pack, which includes a box and one or more battery cell assemblies accommodated in the box. As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box. As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells in the box. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell.

[0117] The battery cell includes a shell, an electrode component, and an electrolyte, the shell being used to accommodate the electrode component and the electrolyte. The electrode component is composed of a positive electrode tab, a negative electrode tab, and a separator film. The battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. The positive electrode tab includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer being coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protruding from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serving as a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode tab includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer being coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protruding from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer serving as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that no fusing occurs when passing a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0118] The material of the separator film can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode component can be a roll structure or a laminated structure, and the embodiments of the present application are not limited thereto.

[0119] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable important role. The battery is composed of a box body and a plurality of battery cells accommodated in the box body. Among them, the battery as a core component of new energy vehicles has high requirements in terms of safety and service life.

[0120] In a general battery, the battery includes a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel, or in a mixed connection manner through a busbar, a wire harness, or an adapter. This can cause the pole of the battery cell to be easily affected by external forces. Among them, the pole being affected by an external force away from the shell is more common. For the convenience of understanding, the pole arrangement of the battery cell on the top of the shell is taken as an example for illustration. At this time, the pole being affected by an external force away from the shell can be a vertical force. When the pole is affected by a large external force, the probability of the pole being broken is relatively large, which can affect the reliability of the pole and further affect the reliability of the battery cell.

[0121] Based on the above considerations, in order to solve the problem that the pole column of the battery monomer is easy to break when subjected to a large external force, the applicant designs a battery monomer, which comprises a shell component, an electrode component and a pole column component. The shell component comprises a first wall provided with a mounting hole; the electrode component is accommodated in the shell component; the pole column component is installed at the mounting hole and comprises a pole column body, a connecting component and a first insulating piece, the pole column body is connected with the electrode component, the connecting component is connected with the first wall, and the connecting component is connected with the pole column body through the first insulating piece; wherein the connecting component comprises a vertical arm, the vertical arm extends 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 column body on the first wall along the thickness direction of the first wall.

[0122] In the battery monomer with the above structure, since the projection of the vertical arm on the first wall at least partially overlaps the projection of the pole column body on the first wall along the thickness direction of the first wall, the vertical arm can limit the pole column body, and since the vertical arm has high strength along the thickness direction of the first wall and is not easy to deform, the vertical arm can provide strong support and better limiting effect. When the pole column body is subjected to an external force away from the first wall, the vertical arm can press against the pole column body, so that the pole column component as a whole has high structural strength, thereby reducing the probability of the pole column body being pulled out of the shell component. Secondly, the projection of the vertical arm on the first wall at least partially overlaps the projection of the pole column body on the first wall, which can also reduce the probability of the pole column body and the connecting component shaking, deforming or displacing when they are matched, and improve the installation stability of the pole column body. That is, the above structure can improve the reliability of the pole column component, and further improve the reliability of the battery monomer.

[0123] The battery monomer or the battery device disclosed in the embodiments of the present application can be used in, but is not limited to, an electric device such as a vehicle, a ship or an aircraft. The power supply system of the electric device can be composed of the battery monomer disclosed in the present application, so that the application range of the battery monomer can be improved.

[0124] The embodiments of the present application provide an electric device using a battery device as a power supply. The electric device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy and an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0125] The following embodiments are described by taking a vehicle as an example for convenience of description.

[0126] Please refer to FIG. 1, which is a structural schematic diagram of a vehicle as the power utilization device according to some embodiments of the present application. 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 a range extended vehicle, etc. The vehicle is internally provided with a battery device 100, which can be arranged at the bottom, the head, or the tail of the vehicle. The battery device 100 can be used for power supply of the vehicle, for example, the battery device 100 can be used as the operating power source of the vehicle. The vehicle can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle during starting, navigation, and driving.

[0127] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of the vehicle, but also be used as the driving power source of the vehicle, to replace or partially replace the fuel or natural gas to provide driving power for the vehicle.

[0128] Please refer to FIG. 2, which is an exploded structural diagram of the battery device 100 according to some embodiments of the present application. The battery device 100 includes a box body 10 and a plurality of battery monomers 20, and the battery monomers 20 are arranged in the box body 10. The box body 10 is used to provide an assembly space for the battery monomers 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 are overlapped with each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery monomers 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate structure, which is overlapped with the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define the assembly space; the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 is overlapped with the open side of the second box body 12. Of course, the box body 10 formed by the first box body 11 and the second box body 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0129] In the battery device 100, the plurality of battery monomers 20 can be connected in series, in parallel, or in a mixed manner, and the mixed manner means that the plurality of battery monomers 20 are connected in series and in parallel. The plurality of battery monomers 20 can be directly connected in series, in parallel, or in a mixed manner, and then the whole of the plurality of battery monomers 20 is accommodated in the box body 10; of course, the battery device 100 can also be that the plurality of battery monomers 20 are first connected in series, in parallel, or in a mixed manner to form a battery module, and then a plurality of battery modules are connected in series, in parallel, or in a mixed manner to form a whole, which is accommodated in the box body 10. The battery device 100 can further include other structures, for example, the battery device 100 can further include a current collecting component for realizing electrical connection between the plurality of battery monomers 20.

[0130] Referring to FIG. 2, the battery device 100 includes a plurality of rows of battery cells 20 arranged along a length direction of the case 10, and each row of battery cells 20 includes a plurality of battery cells 20 arranged along a width direction of the case 10; or the plurality of rows of battery cells 20 are arranged along the width direction of the case 10, and each row of battery cells 20 includes a plurality of battery cells 20 arranged along the length direction of the case 10.

[0131] Each battery cell 20 can be a secondary battery or a primary battery. The secondary battery refers to a battery cell 20 that can be activated by charging after discharging. The secondary battery can 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, or the like. The shape of the battery cell 20 can be a cylinder, a flat body, a cuboid, or the like. In FIG. 2, the shape of the battery cell 20 is a cuboid.

[0132] According to some embodiments of the present application, referring to FIGS. 3-9, the present application provides a battery cell 20, including a housing component 21, an electrode component 22, and a post component 23.

[0133] The housing component 21 includes a first wall 201 provided with a mounting hole 201a. The electrode component 22 is received in the housing component 21. The post component 23 is mounted at the mounting hole 201a and includes a post body 231 connected to the electrode component 22, a connecting component 232 connected to the first wall 201, and a first insulating member 233 insulatingly connected to the post body 231. The connecting component 232 includes a vertical arm 2321 extending away from the first wall 201, and a projection of the vertical arm 2321 on the first wall 201 at least partially overlaps a projection of the post body 231 on the first wall 201 along a thickness direction of the first wall 201.

[0134] The shell member 21 can refer to a housing structure for wrapping and protecting the internal chemical materials and components of the battery. The shell member 21 can include a plurality of shell walls that communicate to enclose the housing structure. The first wall 201 can refer to one of the plurality of shell walls, which can be, but is not limited to, a top wall, a bottom wall, a front side wall, a rear side wall, a left side wall, or a right side wall of the shell member 21, and the like. The number of shell walls varies depending on the shape of the shell member 21, which can be, but is not limited to, a cuboid, a cube, a cylinder, and the like. For example, referring to FIGS. 3 and 11, the shape of the shell member 21 is a cuboid, and the first wall 201 is a top wall of the shell member 21. The mounting hole 201a can refer to a through hole passing through the first wall 201 for mounting the pole member 23.

[0135] The electrode member 22 can refer to a member composed of a positive electrode tab, a negative electrode tab, and a separator, which will be described in detail below.

[0136] The pole member 23 can refer to a member made of a metal material having good electrical conductivity, which is a key member for connecting the inside of the battery monomer 20 to an external circuit, and is responsible for leading the electric current generated inside the battery monomer 20 to the external circuit or leading the electric current of an external power source into the battery monomer 20 when charging.

[0137] As an example, the number of pole members 23 can be one or more. When the pole member 23 is one, the pole member 23 is a negative pole. When the pole member 23 is a plurality, some of the plurality of pole members 23 can be positive poles, and the rest can be negative poles, or all of the plurality of pole members 23 can be negative poles.

[0138] The pole body 231 can refer to a member made of a metal material having good electrical conductivity. The material of the pole body 231 can be, but is not limited to, aluminum, copper, silver, gold, and the like.

[0139] The connecting member 232 can refer to a member for connecting the pole body 231 and the first wall 201.

[0140] The first insulating member 233 can refer to a member for insulating between the connecting member 232 and the pole body 231. The material of the first insulating member 233 can be, but is not limited to, rubber or plastic, and the like. The rubber can be, but is not limited to, silicone rubber, fluororubber, and the like. The plastic can be, but is not limited to, polypropylene, polyethylene, and the like. Since the shell member 21 is usually made of a metal material, the connecting member 232 is connected to the pole body 231 in an insulated manner through the first insulating member 233, thereby reducing the risk of short circuit between the pole body 231 and the first wall 201 and improving the reliability of the battery monomer 20.

[0141] The "connecting component 232 includes a vertical arm 2321" can be understood as the connecting component 232 can only include the vertical arm 2321, or the connecting component 232 can include other components in addition to the vertical arm 2321, and the other components of the connecting component 232 are not specifically limited in this example. The vertical arm 2321 can refer to a plate-like or block-like structure that stands up relative to the first wall 201, and the vertical arm 2321 can generally refer to an arm plate with a thickness less than a height, so that the vertical arm 2321 has greater strength and support. The thickness direction of the vertical arm 2321 can be the second direction Y of FIGS. 6-10, and the height direction can be the third direction Z of FIGS. 6-10.

[0142] The "vertical arm 2321 extends in a direction away from the first wall 201" can be understood as the vertical arm 2321 and the first wall 201 can be arranged at an included angle, which can be an angle greater than 0 degrees and less than 180 degrees, which is not limited here.

[0143] The "thickness direction of the first wall 201" can be the third direction Z of FIGS. 3, 11, and 12 as an example.

[0144] The "projection of the vertical arm 2321 on the first wall 201 at least partially overlaps the projection of the pole body 231 on the first wall 201" can be understood as the projection of the vertical arm 2321 on the first wall 201 can partially overlap the projection of the pole body 231 on the first wall 201 (see FIG. 4), or the entire projection of the vertical arm 2321 on the first wall 201 overlaps the projection of the pole body 231 on the first wall 201. Whether the projection of the vertical arm 2321 partially overlaps the projection of the pole body 231 or fully overlaps 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, and when the pole body 231 is subjected to a force in the thickness direction of the first wall 201, the vertical arm 2321 can stop the pole body 231 by the first insulating member 233 to limit displacement of the pole body 231.

[0145] Since the vertical arm 2321 is a structure similar to a vertical plate with a width less than a height, the vertical arm 2321 has strong strength and support in the thickness direction of the first wall 201. When the pole body 231 is subjected to a force in a direction away from the first wall 201, the vertical arm 2321 can provide stronger support and limiting action for the pole body 231, and since the vertical arm 2321 has a low probability of deformation, it can also provide more stable and reliable support and limiting action for the pole body 231. That is, by using the vertical arm 2321 with the above structure, the structural strength of the pole component 23 as a whole can be improved, thereby improving the reliability of the pole component 23.

[0146] Especially for the battery monomer with thinner thickness (the thickness of the battery monomer can refer to the size in the second direction Y of FIG. 11), such as the blade battery and the like, due to the small thickness of the battery monomer, the electrode component is usually arranged on the small face of the shell component, which causes the limited space for the pole component, and the size of the pole component is small. It is difficult to improve the structural strength of the pole component under the premise of ensuring the welding surface of the pole and the bus bar and the like meets the requirements. In the scheme of the application, the vertical arm 2321 and the pole body 231 adopt the above structure, which can reduce the size of the connecting component 232 in the thickness direction of the battery monomer 20 (refer to the second direction Y of FIG. 11) under the premise of improving the overall structural strength of the pole component 23, is conducive to making the pole component 23 of the battery monomer 20 with thinner thickness have higher strength, reducing the probability of fracture of the pole body 231 when subjected to external force, improving the reliability of the pole component 23, and further improving the reliability of the battery monomer 20 with thinner thickness. On the other hand, in the battery monomer 20 with thinner thickness, the above structure is also conducive to increasing the area of the side of the pole body 231 away from the first wall 201 under the premise that the structural strength of the pole component 23 can meet the requirements, and further increasing the area of the welding joint surface of the pole body 231 and the bus bar and the like, and improving the current carrying capacity of the pole body 231.

[0147] Secondly, in the battery monomer 20 of the above scheme, since the size of the connecting component 232 in the thickness direction of the battery monomer 20 can be relatively small, it is also conducive to reducing the volume of the connecting component 232, and further reducing the volume of the pole component 23, and improving the volume energy density of the battery monomer 20.

[0148] In the battery monomer 20 with the above structure, since 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 in the thickness direction of the first wall 201, the vertical arm 2321 can play a limiting role on the pole body 231, and since the vertical arm 2321 has high strength in the thickness direction of the first wall 201 and is not easy to deform, it can play a strong supporting role and a better limiting role. When the pole body 231 is subjected to external force in the direction away from the first wall 201, the vertical arm 2321 can press against the pole body 231, so that the pole component 23 as a whole has high structural strength, and the probability of the pole body 231 being pulled out of the shell component 21 is reduced. Secondly, 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, which can also reduce the probability of shaking, deformation or displacement of the pole body 231 and the connecting component 232 when they are matched, and improve the installation stability of the pole body 231. That is, the above structure can improve the reliability of the pole component 23, and further improve the reliability of the battery monomer 20.

[0149] In some embodiments of the present application, referring to FIG. 4, FIG. 7, FIG. 9 and FIG. 10, the projection of the upright arm 2321 on the first wall 201 along the thickness direction of the first wall 201 has a first inner contour 2321a and a first outer contour 2321b; the projection of the pole body 231 on the first wall 201 along the thickness direction of 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.

[0150] The "thickness direction of the first wall 201" refers to the third direction Z of FIG. 3.

[0151] The "first inner contour 2321a of the upright arm 2321" can refer to the inner edge line of the figure formed by the projection of the upright arm 2321 on the first wall 201, referring to FIG. 4, FIG. 7, FIG. 9, since FIG. 4 is a sectional view of FIG. 3 along the A-A line, the first inner contour 2321a can be an auxiliary dotted line made on the inner side of the upright arm 2321.

[0152] The "first outer contour 2321b of the upright arm 2321" can refer to the outer edge line of the figure formed by the projection of the upright arm 2321 on the first wall 201, referring to FIG. 4, FIG. 7, FIG. 9, since FIG. 4 is a sectional view of FIG. 3 along the A-A line, the first outer contour 2321b can be an auxiliary dotted line made on the outer side of the upright arm 2321.

[0153] Referring to FIG. 4, the "second outer contour 231a of the pole body 231" can refer to the outer edge line of the figure formed by the projection of the pole body 231 on the first wall 201.

[0154] The first inner contour 2321a can be partially located within the second outer contour 231a, as an example, the first inner contour 2321a and the second outer contour 231a can be irregular contours, including but not limited to tooth-shaped contours, wave-shaped contours, etc., and as an example, referring to FIG. 4, part of the first inner contour 2321a and the second outer contour 231a have an overlapping area.

[0155] The first inner contour 2321a can also be entirely located within the second outer contour 231a, as an example, the first inner contour 2321a and the second outer contour 231a can be regular contours, including but not limited to circles, rectangles or racetrack shapes, etc., and as an example, referring to FIG. 10, the connecting component 232 can only include the upright arm 2321, the upright arm 2321 connects the first wall 201, one end of the pole body 231 close to the inner side of the housing component 21 is provided with a protruding edge, and the protruding edge is located on the side of the upright arm 2321 close to the housing component 21, thereby, along the thickness direction of the first wall 201 (i.e., the third direction X of FIG. 10), the first inner contour 2321a is entirely located within the second outer contour 231a.

[0156] In the technical solution, the first inner contour 2321a of the stand arm 2321 and the second outer contour 231a of the pole body 231 can be arranged in different positions according to different requirements, under the premise that the stand arm 2321 can limit the pole body 231, thereby reducing the processing difficulty of the pole body 231 and the stand arm 2321 and improving the manufacturability of the pole part 23. On the other hand, the arrangement can also improve the space utilization between the stand arm 2321 and the pole body 231. When the first inner contour 2321a is partially located in the second outer contour 231a, a more compact layout can be achieved in a limited space, the gap between the components is fully utilized, and the overall structure is more compact. When the first inner contour 2321a is entirely located in the second outer contour 231a, the space utilization can be further maximized, which is beneficial to reducing the volume of the pole part 23 and the battery monomer 20 and improving the battery energy density.

[0157] In some embodiments of the present application, at least part of the second outer contour 231a is located in the first outer contour 2321b.

[0158] The second outer contour 231a of the pole body 231 can be partially located in the first outer contour 2321b of the stand arm 2321, that is, the second outer contour 231a can partially exceed the first outer contour 2321b. For example, the second outer contour 231a can be an irregular contour, including but not limited to a tooth-shaped contour or a wave-shaped contour, and the like.

[0159] The second outer contour 231a of the pole body 231 can also be entirely located in the first outer contour 2321b of the stand arm 2321, that is, the second outer contour 231a does not exceed the first outer contour 2321b. For details, refer to FIG. 4.

[0160] In the technical solution, the second outer contour 231a of the pole body 231 can be partially or entirely located in the first outer contour 2321b of the stand arm 2321, thereby improving the structural design flexibility of the stand arm 2321 and the pole body 231. When the second outer contour 231a is partially located in the first outer contour 2321b, the relative position relationship between the pole body 231 and the stand arm 2321 can be flexibly adjusted according to requirements, which adapts to different space limitations and functional requirements and provides the possibility for diversified design of the pole part 23. When the second outer contour 231a is entirely located in the first outer contour 2321b, the position distribution of the pole body 231 and the stand arm 2321 can be more compact, which is beneficial to reducing the volume of the pole part 23, saving the installation space of the pole part 23, thereby reducing the volume of the battery monomer 20 and improving the battery energy density.

[0161] In some embodiments of the present application, referring to FIG. 4, part of the first inner contour 2321a of the first outer contour 2321b is located in the first outer contour 2321b, and all of the second outer contour 231a is located in the first outer contour 2321b.

[0162] In the above technical solution, part of the first inner contour 2321a of the stand arm 2321 is located in the first outer contour 2321b of the stand arm 2321, which can form a certain spatial hierarchy in the structure of the stand arm 2321, and under the premise that the stand arm 2321 can limit the pole body 231, it is beneficial to integrate the space between the stand arm 2321 and the pole body 231, improve the space utilization, make the stand arm 2321 and the pole body 231 more compact, and further reduce the volume of the battery monomer 20 and improve the battery energy density.

[0163] All of the second outer contour 231a of the pole body 231 is located in the first outer contour 2321b of the stand arm 2321, which can make the overall appearance of the stand arm 2321 relatively flat, and the pole body 231 will not protrude from the outside of the stand arm 2321, which is beneficial to make the overall pole part 23 relatively regular, facilitate processing and manufacturing, and also reduce the size of the pole part 23 and improve the battery energy density. On the other hand, when the first insulating piece 233 covers the outside of the stand arm 2321, the above scheme is also beneficial to keep the overall thickness of the first insulating piece 233 on the outside of the stand arm 2321, which can reduce the problem of stress concentration of the first insulating piece 233 and reduce the risk of electrical breakdown. It can be seen that the above technical solution is beneficial to balanced control of the size, appearance, manufacturability and other properties of the pole part 23 under the premise that the stand arm 2321 can limit the pole body 231.

[0164] In some embodiments of the present application, referring to FIG. 4, FIG. 5, FIG. 7 to FIG. 9, FIG. 12, FIG. 17 to FIG. 20, the stand arm 2321 is arranged around the pole body 231 in the circumferential direction, one of the stand arm 2321 and the pole body 231 is provided with a recess 2301 on the circumferential side, and the other of the stand arm 2321 and the pole body 231 is provided with a protrusion 2302 on the circumferential side. At least part of the protrusion 2302 extends into the recess 2301, and the two are insulated by the first insulating piece 233.

[0165] The stand arm 2321 is arranged around the pole body 231 in the circumferential direction, which can be understood as that the stand arm 2321 is a ring-shaped arm plate, which is beneficial to provide limiting effect to multiple positions of the pole body 231 in the circumferential direction, and enhance the limiting effect of the stand arm 2321 to the pole body 231. For example, referring to FIG. 4, FIG. 12, FIG. 17 to FIG. 20, the stand arm 2321 is a ring-shaped component.

[0166] The recess 2301 can be, but is not limited to, a groove, a through hole, etc. The protrusion 2302 can refer to a structure protruding from the surface of the standing arm 2321 or the pole body 231. As an example, referring to FIGS. 17, 19 and 20, the protrusion 2302 is a protruding tooth.

[0167] Referring to FIGS. 17 to 20, the standing arm 2321 can be provided with the recess 2301, and the recess 2301 can be one or more. When the recess 2301 is multiple, the multiple recesses 2301 are arranged at intervals along the circumferential side of the standing arm 2321. The pole body 231 can be provided with the protrusion 2302, and the protrusion 2302 can be one or more. When the protrusion 2302 is multiple, the multiple protrusions 2302 are arranged at intervals along the circumferential side of the pole body 231.

[0168] The standing arm 2321 can also be provided with the protrusion 2302, and the protrusion 2302 can be one or more. When the protrusion 2302 is multiple, the multiple protrusions 2302 are arranged at intervals along the circumferential side of the standing arm 2321. The pole body 231 can be provided with the recess 2301, and the recess 2301 can be one or more. When the recess 2301 is multiple, the multiple recesses 2301 are arranged at intervals along the circumferential side of the pole body 231.

[0169] “at least part of the protrusion 2302 extends into the recess 2301” can mean that part of the protrusion 2302 extends into the recess 2301, or the entire protrusion 2302 extends into the recess 2301.

[0170] “the standing arm 2321 and the pole body 231 are insulated by the first insulation 233” can be understood as that the first insulation 233 is at least partially arranged between the standing arm 2321 and the pole body 231 to insulate the standing arm 2321 and the pole body 231 from each other. Accordingly, it can be understood that a gap will be reserved between the protrusion 2302 and the recess 2301, and the first insulation 233 will be filled in the gap, thereby insulating the protrusion 2302 and the recess 2301.

[0171] In the technical solution, the stand arm 2321 and the pole body 231 can be embedded with each other through the convex part 2302 and the concave part 2301, so that the structural strength of the stand arm 2321 and the pole body 231 as a whole can be increased. When the pole body 231 is subjected to an external force in a direction away from the first wall 201, the embedded structure of the stand arm 2321 and the pole body 231 can better withstand stress, which is conducive to reducing the probability of deformation or damage and further reducing the probability of the pole body 231 being pulled away from the stand arm 2321. The stand arm 2321 and the pole body 231 can also be mechanically locked through the convex part 2302 and the concave part 2301, so that the connection between the stand arm 2321 and the pole body 231 is more firm, which is conducive to maintaining a relatively stable positional relationship between the stand arm 2321 and the pole body 231 when the battery monomer 20 is subjected to vibration, impact or other external forces, and is not prone to loosening or displacement. It can be seen that the stand arm 2321 and the pole body 231 with the above structure can further improve the reliability and stability of the pole part 23 as a whole and further improve the reliability of the battery monomer 20.

[0172] In some embodiments of the present application, referring to FIG. 10, the connecting part 232 and the first wall 201 are integrally formed.

[0173] In the technical solution, since the stand arm 2321 of the connecting part 232 is used to limit the pole body 231, by integrally forming the connecting part 232 and the first wall 201 of the shell part 21, there is no connection gap between the connecting part 232 and the first wall 201, which can reduce the weak point between the connecting part 232 and the first wall 201, so that the overall structural strength of the connecting part 232 and the shell part 21 is higher and more firm. When the battery monomer 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 limiting reliability of the stand arm 2321 to the pole body 231 and further improving the installation stability and reliability of the pole body 231.

[0174] Secondly, the connecting part 232 and the first wall 201 are integrally formed and have no gap between them, which can reduce the potential leakage path in the battery monomer 20, is conducive to improving the sealing performance of the battery monomer 20, and further improves the reliability of the battery monomer 20. Moreover, the integrally formed connecting part 232 and the first wall 201 can also reduce the assembly steps, which can reduce the complexity of the manufacturing process of the battery monomer 20, improve production efficiency, reduce costs, and also reduce the incidence of quality problems caused by poor connection of the connecting part 232 and the shell part 21, which is conducive to improving the consistency and quality stability of the battery monomer 20.

[0175] In some embodiments of the present application, the stand arm 2321 is perpendicular to the first wall 201.

[0176] In the technical solution, the vertical structure formed by the vertical arm 2321 and the first wall 201 of the shell component 21 can provide more stable support for the pole body 231, which is conducive to keeping the pole body 231 in a relatively stable position and better bearing the force from the pole body 231 when the battery monomer 20 is subjected to external force, thereby improving the reliability of the pole component 23 and further improving the reliability of the battery monomer 20. In addition, the structure of the vertical arm 2321 perpendicular to the first wall 201 is relatively simple and easy to manufacture and process, which is conducive to improving the consistency and quality stability of the pole component 23.

[0177] In some embodiments of the present application, referring to FIGS. 5-9, 12, 14, 16-20, the connecting component 232 includes a horizontal arm 2322, the horizontal arm 2322 surrounds the pole body 231 and connects the vertical arm 2321 and the first wall 201, and the horizontal arm 2322 and the vertical arm 2321 are arranged at an angle.

[0178] The horizontal arm 2322 can refer to an arm plate substantially horizontally arranged. In the example, the horizontal arm 2322 and the vertical arm 2321 can both be annular components arranged around the circumference of the pole body 231. In the example, the connecting component 232 can only include the vertical arm 2321 and the horizontal arm 2322, and the horizontal arm 2322 is connected to the first wall 201.

[0179] The "horizontal arm 2322 and vertical arm 2321 are arranged at an angle" can mean that there is an angle between the horizontal arm 2322 and the vertical arm 2321, which can be substantially 90 degrees, so that the horizontal arm 2322 can be connected to the first wall 201 and the vertical arm 2321 can be closer to the circumference of the pole body 231 to better limit the circumference.

[0180] In the technical solution, the connecting component 232 with the above structure can make the vertical arm 2321 not in direct contact with the first wall 201, that is, the horizontal arm 2322 can provide a position connected to the first wall 201. Since the horizontal arm 2322 is mainly used to connect the first wall 201 and can provide a suitable operation space, it is convenient for the connection of the horizontal arm 2322 and the first wall 201. On the other hand, the connecting component 232 with the above structure can also reduce the influence of the connection of the connecting component 232 and the first wall 201 on the vertical arm 2321, reduce the probability of rupture or damage of the vertical arm 2321, improve the stability and reliability of the vertical arm 2321, and improve the reliability of the structure formed between the vertical arm 2321 and the pole body 231.

[0181] Optionally, referring to FIGS. 17-20, the vertical arm 2321 and the horizontal arm 2322 are integrally formed.

[0182] In the optional example, referring to FIG. 17 and FIG. 18, the stand arm 2321 and the cross arm 2322 can be runway-shaped as a whole; or, referring to FIG. 19 and FIG. 20, the stand arm 2321 and the cross arm 2322 can be circular as a whole.

[0183] With the scheme, the consistency of the connecting component 232 as a whole is better, the structural strength is higher, and the reliability of the connecting component 232 can be improved. On the other hand, the stand arm 2321 and the cross arm 2322 are integrally formed, which can also reduce the processing difficulty of the connecting component 232 and reduce the cost.

[0184] In some embodiments of the present application, referring to FIG. 5 to FIG. 9, FIG. 12 to FIG. 16, the connecting component 232 includes a cross arm 2322 and an adapter 2323, the cross arm 2322 surrounds the pole body 231 and connects the stand arm 2321, the cross arm 2322 and the stand arm 2321 are arranged at an angle, and the adapter 2323 surrounds the pole body 231 and connects the cross arm 2322 and the first wall 201.

[0185] The adapter 2323 can refer to a component for connecting the cross arm 2322 and the first wall 201. The adapter 2323 can be, but is not limited to, a plate-shaped component or a block-shaped component, etc. For example, referring to FIG. 5 and FIG. 12, the adapter 2323 can be an adapter plate. The adapter 2323 can also be, but is not limited to, a metal material piece, a composite material piece, etc., and the metal material includes, but is not limited to, aluminum, copper, steel, etc. The connection mode of the adapter 2323 and the first wall 201 can be, but is not limited to, welding, riveting or clamping, etc.

[0186] The "adapter 2323 surrounds the pole body 231" can mean that the adapter 2323 is a ring-shaped component, which can be specifically referred to FIG. 12.

[0187] In the above technical scheme, since the connecting component 232 includes not only the stand arm 2321 for limiting the pole body 231, but also the adapter 2323 connected with the first wall 201 and the cross arm 2322 connecting the stand arm 2321 and the adapter 2323, the entire pole component 23 can be assembled outside the shell component 21, and then connected with the first wall 201 through the adapter 2323, without assembling each part of the pole component 23 on the shell component 21. Therefore, the assembly difficulty of the pole component 23 can be reduced, the installation and cooperation of the pole component 23 and the shell component 21 can be facilitated, and the installation time and cost can be saved.

[0188] Secondly, in the conventional pole post component structure, the pole post body needs to press on the sealing component placed on the first wall of the shell component to realize the sealing of the shell component, but such a sealing mode requires a large pre-tightening force for ensuring the sealing, and when the thickness of the shell component is thin, the first wall is prone to deformation or damage due to the large pressure applied by the pole post component to the first wall. The connecting component 232 in the above structure of the present application can be insulated and connected with the pole post body 231 through the first insulating piece 233 when the pole post component 23 is installed to the first wall 201, so that the sealing requirement between the connecting component 2323 and the first wall 201 can be reduced, and a large force does not need to be applied to the pole post component 23 to meet the sealing requirement at the connecting position of the connecting component 2323 and the first wall 201, thereby the stress deformation problem of the first wall 201 can be improved, the wall thickness of the shell component 21 can be reduced, the weight of the battery monomer 20 can be reduced, and the battery energy density can be improved.

[0189] In some embodiments of the present application, the horizontal arm 2322 is perpendicular to the vertical arm 2321.

[0190] In the above technical solution, the vertical structure formed by the horizontal arm 2322 and the vertical arm 2321 can have higher structural strength, better withstand the force from the pole post body 231 when the battery monomer 20 is subjected to external force, improve the reliability of the pole post component 23, and further improve the reliability of the battery monomer 20. The structure that the horizontal arm 2322 is perpendicular to the vertical arm 2321 is also relatively simple, easy to manufacture and process, and is conducive to improving the consistency and quality stability of the pole post component 23.

[0191] In some embodiments of the present application, referring to FIGS. 7, 14 and 16, the pole post body 231 is provided with a protruding portion 2302, the vertical arm 2321 is provided with a recessed portion 2301, the recessed portion 2301 penetrates the vertical arm 2321 in a direction close to the electrode component 22, and an opening 2321c is formed on the side of the vertical arm 2321 close to the electrode component 22.

[0192] In the above technical solution, since the protruding portion 2302 of the pole post body 231 is to be installed in cooperation with the recessed portion 2301 of the vertical arm 2321, by penetrating the recessed portion 2301 through the vertical arm 2321 in a direction close to the electrode component 22 and forming the opening 2321c, the protruding portion 2302 can enter the recessed portion 2301 from the opening 2321c below the vertical arm 2321, facilitating the cooperation of the pole post body 231 and the vertical arm 2321, reducing the installation difficulty of the pole post body 231 and the vertical arm 2321, improving the assembly efficiency, and reducing the cost. The penetration of the recessed portion 2301 through the vertical arm 2321 towards the side close to the electrode component 22 can also reduce the weight of the vertical arm 2321, thereby reducing the weight of the pole post component 23 and the weight of the battery monomer 20, improving the battery energy density.

[0193] In some embodiments of the present application, referring to FIGS. 7, 14 and 16, the connecting component 232 includes a cross arm 2322 connecting the vertical arm 2321 and provided with an avoiding groove 2322a communicating with the recess 2301.

[0194] The avoiding groove 2322a can refer to an avoiding space provided on the cross arm 2322 close to the inner side of the shell component 21. In the example scheme, the avoiding groove 2322a can be, but is not limited to, a groove or a hole penetrating through the cross arm 2322, which is not specifically limited here.

[0195] In the above technical scheme, in the process of installing the pole body 231 through the cooperation of the convex part 2302 and the recess 2301 of the vertical arm 2321, the avoiding groove 2322a can provide a lateral movement space for the convex part 2302 of the pole body 231, that is, provide a redundant space in the direction parallel to the first wall 201 when the pole body 231 and the cross arm 2322 are installed, provide a certain fault tolerance for the cooperation of the convex part 2302 and the recess 2301, and be beneficial to reduce the installation difficulty of the pole body 231 and the vertical arm 2321, save the installation time, and improve the assembly efficiency. Moreover, the avoiding groove 2322a can reduce the weight of the cross arm 2322, reduce the weight of the battery monomer 20, and improve the battery energy density.

[0196] In some embodiments of the present application, referring to FIGS. 7, 14 and 16, the avoiding groove 2322a penetrates through the cross arm 2322 in a direction away from the electrode component 22.

[0197] In the above scheme, the avoiding groove 2322a is a hole penetrating through the cross arm 2322, which can realize visual assembly of the convex part 2302 of the pole body 231 and the recess 2301 of the vertical arm 2321 during installation and cooperation, reduce the assembly difficulty, save the assembly time, and 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 monomer 20 and further improving the battery energy density.

[0198] In some embodiments of the present application, referring to FIGS. 6 and 8, the first insulating piece 233 includes an outer ring part 2331, an inner ring part 2332, a first extension part 2333 and a second extension part 2334. The outer ring part 2331 is wrapped on one side of the vertical arm 2321 away from the pole body 231; the inner ring part 2332 is arranged between the vertical arm 2321 and the pole body 231 and connected to the outer ring part 2331; the first extension part 2333 is arranged between the recess 2301 and the convex part 2302 and connected to the outer ring part 2331 and the inner ring part 2332; and the second extension part 2334 is arranged in the avoiding groove 2322a and connected to the outer ring part 2331 and the inner ring part 2332.

[0199] The outer ring portion 2331 can refer to a portion of the first insulating member 233 located outside the stand arm 2321.

[0200] The inner ring portion 2332 can refer to a portion of the first insulating member 233 located between the stand arm 2321 and the pole body 231.

[0201] The first extension portion 2333 can refer to a portion of the first insulating member 233 located between the concave portion 2301 and the convex portion 2302.

[0202] The second extension portion 2334 can refer to a portion of the first insulating member 233 located inside the avoiding groove 2322a.

[0203] In the above technical solution, the first insulating member 233 with the above structure can insulate the outer side of the stand arm 2321 through the outer ring portion 2331, insulate between the stand arm 2321 and the pole body 231 through the inner ring portion 2332, insulate between the concave portion 2301 and the convex portion 2302 through the first extension portion 2333, and insulate between the pole body 231 and the avoiding groove 2322a through the second extension portion 2334. Thus, the first insulating member 233 can have a more comprehensive and sufficient insulation effect, reduce the risk of electrical breakdown of the pole component 23, and also play a certain sealing role while insulating, thereby reducing the probability of a leakage point on the pole component 23, improving the reliability of the pole component 23, and improving the reliability of the battery monomer 20.

[0204] 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 one-piece injection molded members.

[0205] In the above technical solution, the first insulating member 233 is a one-piece injection molded member, which can prevent connection gaps from occurring 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. Moreover, the first insulating member 233 being a one-piece injection molded member can improve the overall structural strength of the first insulating member 233, reduce the probability of deformation or damage of the battery monomer 20 when subjected to external forces, improve the reliability of the first insulating member 233, and thereby facilitate the improvement of the reliability of the battery monomer 20. Furthermore, the first insulating member 233 being a one-piece injection molded member has a relatively simple process, which can reduce costs and improve production capacity.

[0206] In some embodiments of the present application, the inner ring portion 2332, the first extension portion 2333, and the second extension portion 2334 are one-piece injection molded members, and the outer ring portion 2331 is injection molded and connected to the inner ring portion 2332.

[0207] In the technical scheme, the first insulating piece 233 is a split structure, and the inner ring portion 2332, the first extension portion 2333, and the second extension portion 2334 can be formed by injection molding first, and then the outer ring portion 2331 connected with the inner ring portion 2332, the first extension portion 2333, and the second extension portion 2334 can be formed by injection molding. This way has high operation flexibility, can adapt to different needs, and is suitable for different manufacturing processes, facilitates assembly, and reduces cost.

[0208] In some embodiments of the present application, referring to FIG. 21, the connecting component 232 includes a cantilever arm 2324 arranged at one end of the vertical arm 2321 away from the first wall 201 and extending towards the side close to the pole body 231, and the cantilever arm 2324 is pressed against the pole body 231 by the first insulating piece 233.

[0209] The cantilever arm 2324 can be an arm plate in a suspended state relative to the vertical arm 2321, so that the vertical arm 2321 and the cantilever arm 2324 as a whole have an L shape. In this embodiment, the connecting component 232 can further include a horizontal arm 2322, or include the horizontal arm 2322 and the adapter 2323.

[0210] In the technical scheme, the connecting component 232 not only includes the vertical arm 2321 matched with the pole body 231, but also includes the cantilever arm 2324 connected with the vertical arm 2321 and extending towards the side close to the pole body 231, so that the cantilever arm 2324 can limit the side of the pole body 231 away from the first wall 201, and the vertical arm 2321 and the cantilever arm 2324 can form a more stable and reliable structure after being connected with the pole body 231 by the first insulating piece 233, thereby improving the installation reliability of the pole body 231. Moreover, the structure formed by the vertical arm 2321 and the cantilever arm 2324 can better surround the pole body 231, thereby providing better protection and reducing the risk of deformation or damage of the pole body 231 due to external forces, improving the reliability of the pole component 23 and the reliability of the battery monomer 20.

[0211] In some embodiments of the present application, referring to FIGS. 6-9, 12, 14, and 16, the pole component 23 includes a sealing piece 234 surrounding the pole body 231 and sealed between the pole body 231 and the connecting component 232.

[0212] The sealing member 234 can refer to a component for preventing the leakage of substances inside the battery monomer 20 and for preventing external substances such as moisture, dust, and the like from entering the inside of the battery monomer 20. The sealing member 234 is generally made of a material having good elastic sealing properties and can include, but is not limited to, rubber, silicone, and the like. The "sealing member 234 surrounds the pole post body 231" can refer to the fact that the sealing member 234 is a ring-shaped component in this embodiment and can serve to provide a more comprehensive sealing effect.

[0213] In the above technical solution, by providing the sealing member 234 between the pole post body 231 and the connecting component 232, the sealing property between the pole post body 231 and the connecting component 232 can be improved, the pole post component 23 can have self-sealing properties, and the sealing property of the pole post component 23 and the shell component 21 can be further improved, which is beneficial to improving the reliability of the battery monomer 20.

[0214] In some embodiments of the present application, the sealing member 234 and the first insulating member 233 are integrally formed.

[0215] For example, the sealing member 234 and the first insulating member 233 can be integrally injection molded.

[0216] In the above technical solution, the use of the above structure can reduce the process difficulty of the assembly composed of the sealing member 234 and the first insulating member 233, simplify the manufacturing process, reduce the cost, and improve the yield. Moreover, the sealing member 234 and the first insulating member 233 are integrally formed, so that there is no gap between the sealing member 234 and the first insulating member 233, which can reduce the leakage points on the pole post component 23, further improve the sealing property of the pole post component 23, and improve the reliability of the battery monomer 20.

[0217] In some embodiments of the present application, referring to FIGS. 6 to 9, 12, 14, and 16, the pole post component 23 includes a second insulating member 235, the second insulating member 235 surrounds the pole post body 231 and covers a side of the connecting component 232 facing the inside of the shell component 21, and is connected to the connecting component 232.

[0218] The second insulating member 235 can refer to a component that can serve as an insulating member, and the material thereof can be the same as or different from that of the first insulating member 233. The second insulating member 235 can also be, but is not limited to, an insulating sheet, an insulating film, and the like. For example, referring to FIG. 12, the second insulating member 235 can be a plastic plate.

[0219] The "second insulating member 235 surrounds the pole post body 231" can be understood as the fact that the second insulating member 235 is a ring-shaped component, which can serve to provide a more comprehensive insulation effect.

[0220] The "second insulation piece 235 covers the side of the connecting part 232 facing into the shell part 21" can be understood as that the second insulation piece 235 can be attached to the side of the connecting part 232 facing into the shell part 21, or the second insulation piece 235 can be spaced apart from the side of the connecting part 232 facing into the shell part 21, as long as the connecting part 232 and the electrode part 22 are isolated.

[0221] The connecting manner of the second insulation piece 235 and the connecting part 232 can be, but is not limited to, clamping, screwing, bonding, and the like, which is not specifically limited here.

[0222] Since the pole part is generally welded to the shell part in the conventional pole structure, the connecting part 232 of the application is usually made of metal to facilitate welding to the shell part 21. In the above technical solution, the second insulation piece 235 can play an insulating role on the side of the pole body 231 close to the electrode part 22, which can reduce the risk of short circuit caused by the contact between the electrode part 22 and the connecting part 232 during the connection of the pole body 231 and the electrode part 22. Even if the connecting part 232 is not a metal piece, the second insulation piece 235 can also help reduce the probability of short circuit caused by the contact between the electrode part 22 and the first wall 201. That is, the above solution can improve the reliability of the battery monomer 20 during production and manufacturing, and is beneficial to improve the product yield.

[0223] In some embodiments of the application, referring to FIGS. 12 and 14, one of the second insulation piece 235 and the connecting part 232 is provided with a clamping part 2303, and the other is provided with a clamped part 2304. The clamped part 2304 and the clamping part 2303 are detachably connected.

[0224] The clamping part 2303 and the clamped part 2304 can refer to components that can be clamped with each other. As an example, the clamping part 2303 can be a clamping groove, and the clamped part 2304 can be a clamping protrusion or a clamping hook; or the clamping part 2303 is a clamping hook, and the clamped part 2304 is a clamping buckle. The clamping part 2303 and the clamped part 2304 can also have other clamping structures, which are not specifically limited in the application.

[0225] In the above technical solution, the second insulation piece 235 and the connecting part 232 can be detachably connected through the clamping part 2303 and the clamped part 2304. On the one hand, such a detachable structure is relatively simple and easy to install or detach, which can improve the assembly efficiency. On the other hand, such a detachable structure facilitates the replacement or repair of damaged parts, which can reduce the use cost.

[0226] In some embodiments of the application, the second insulation piece 235 and the first insulation piece 233 are integrally formed.

[0227] It can be understood that the second insulation part 235 and the first insulation part 233 can be integrally injection molded. For example, a small hole for allowing liquid injection material to pass through can be arranged on the connecting part 232. The injection material heated and melted can form the first insulation part 233 on the outer side of the vertical arm 2321, and another part of the injection material can pass through the small hole to form the first insulation part 233 on the side of the connecting part 232 close to the shell part 21.

[0228] In the above technical solution, the second insulation part 235 and the first insulation part 233 are integrally molded, which can reduce the molding process of the second insulation part 235 and the first insulation part 233, reduce the manufacturing steps, and improve the yield. Moreover, the second insulation part 235 and the first insulation part 233 are integrally molded, which can also make the second insulation part 235 and the first insulation part 233 seamless, reduce the leakage points on the pole part 23, and further improve the sealing performance of the pole part 23 and the reliability of the battery monomer 20.

[0229] In some embodiments of the present application, referring to FIGS. 6 and 8, the pole part 23 includes a sealing part 234, which surrounds the pole body 231 and is sealed between the pole body 231 and the connecting part 232. The sealing part 234, the first insulation part 233, and the second insulation part 235 are integrally molded.

[0230] In the above technical solution, the sealing part 234, the first insulation part 233, and the second insulation part 235 can be integrally molded to form one part, which can simplify the molding process of the sealing part 234, the first insulation part 233, and the second insulation part 235, reduce the manufacturing difficulty, and thus reduce the cost, which is conducive to improving the yield. Moreover, the above solution can also make the sealing part 234, the first insulation part 233, and the second insulation part 235 form a stable and reliable structure, which can reduce the risk of deformation or damage of the sealing part 234, the first insulation part 233, and the second insulation part 235 when the battery monomer 20 is subjected to external action, improve the sealing performance and insulation performance of the pole part 23, and further improve the reliability of the pole part 23 and the battery monomer 20. The sealing part 234, the first insulation part 233, and the second insulation part 235 are integrally molded, which can also make them seamless, further reduce the leakage points on the pole part 23, and thus further improve the sealing performance and insulation performance of the pole part 23, which is conducive to further improving the reliability of the battery monomer 20.

[0231] In some embodiments of the application, referring to FIG. 14 and FIG. 16, the battery cell 20 comprises a third insulating member 24, which covers a side of the first wall 201 facing into the housing member 21, and is provided with a fitting hole 24a corresponding to the mounting hole 201a. With reference to a reference plane parallel to the first wall 201, the edge of the projection of the fitting hole 24a on the reference plane is within the projection of the second insulating member 235 on the reference plane.

[0232] The third insulating member 24 can be a component that functions as insulation, and can be made of the same material as the first insulating member 233. The third insulating member 24 can be, but is not limited to, an insulating plate, an insulating film, or the like. For example, referring to FIG. 14 and FIG. 16, the third insulating member 24 can be a plastic member. The fitting hole 24a can be a through hole formed in the third insulating member 24, and can provide a passage for the connection of the pole body 231 and the electrode member 22, so that the tab of the electrode member 22 can pass through the pole body 231, or so that part of the pole body 231 can pass through the tab of the electrode member 22.

[0233] The reference plane can be a plane perpendicular to the third direction Z. The edge of the projection of the fitting hole 24a on the reference plane being within the projection of the second insulating member 235 on the reference plane means that the size of the fitting hole 24a is smaller than that of the second insulating member 235, and the fitting hole 24a is covered by the second insulating member 235, so that the projections of the second insulating member 235 and the third insulating member 24 on the reference plane overlap.

[0234] In the above scheme, the third insulating member 24 can insulate the side of the first wall 201 close to the electrode member 22, so as to reduce the risk of short circuit caused by the contact between the electrode member 22 and the housing member 21 when the electrode member 22 enters the housing or when the electrode member 22 and the pole member 23 are connected. The fitting hole 24a corresponds to the mounting hole 201a, so as to provide a passage for the connection of the pole body 231 and the electrode member 22, facilitating the connection of the pole body 231 and the electrode member 22. The edge of the projection of the fitting hole 24a on the reference plane parallel to the first wall 201 is within the projection of the second insulating member 235 on the reference plane, so that the projections of the second insulating member 235 and the third insulating member 24 on the reference plane partially overlap, which can improve the insulation of the connection position of the second insulating member 235 and the third insulating member 24, and reduce the probability of the occurrence of gaps, thereby improving the reliability of the battery cell 20.

[0235] In some embodiments of the application, referring to FIG. 14 and FIG. 16, the second insulating member 235 and the connecting member 232 are detachably connected, and the third insulating member 24 is provided with a limiting portion 241 extending toward the side of the pole body 231 and located at the side of the second insulating member 235 close to the electrode member 22.

[0236] The detachable connection manner of the second insulating member 235 and the connecting component 232 can be, but is not limited to, threaded connection or buckle connection, etc. Since the size of the pole component 23 is generally small, the second insulating member 235 and the connecting component 232 are connected in this manner, which is easy to operate and convenient for disassembly and replacement, and can reduce the manufacturing cost.

[0237] The limiting portion 241 can refer to a structure or component capable of limiting the pole body 231. The "limiting portion 241 extends towards the 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 that the limiting portion 241 can be, but is not limited to, L-shaped or arc-shaped, etc. Exemplarily, referring to FIGS. 14 and 16, the limiting portion 241 is L-shaped.

[0238] In the above scheme, the second insulating member 235 and the connecting component 232 are detachable, which is convenient for maintenance or replacement. The third insulating member 24 can limit the side of the second insulating member 235 close to the electrode component 22 through the limiting portion 241, which can support the second insulating member 235 when the second insulating member 235 and the connecting component 232 are separated, thereby reducing the risk of falling of the second insulating member 235 into the shell component 21 and causing insulation failure, and can make the pole component 23 have stable and reliable insulation, improve the reliability of the pole component 23, and further improve the reliability of the battery monomer 20.

[0239] In some embodiments of the present application, referring to FIG. 10, the standing arm 2321 is connected to the first wall 201 away from the side of the pole body 231, the pole body 231 is provided with a protrusion 2302, and the standing arm 2321 has an abutting end 2321d facing the inner side of the shell component 21, and the abutting end 2321d is connected to the protrusion 2302 through the first insulating member 233.

[0240] In the above technical scheme, the connecting component 232 can only include the standing arm 2321, the standing arm 2321 is connected to the first wall 201, and the abutting end 2321d of the standing arm 2321 close to the inner side of the shell component 21 can abut against the protrusion 2302 through the first insulating member 233, which can make the standing arm 2321 limit the pole body 231 when the battery monomer 20 is subjected to external force, thereby reducing the probability of the pole body 231 being pulled out of the shell component 21. The structure of the above connecting component 232 is relatively simple, the manufacturability is good, the cost can be reduced, and the size of the connecting component 232 can be reduced, which can be suitable for thin-width battery monomers 20, and can also reduce the overall weight of the pole component 23, which is conducive to improving the energy density of the battery monomer 20.

[0241] In some embodiments of the present application, referring to Figures 3, 11, 13 and 15, the shell component 21 comprises a shell 211 and an end cover 212, the shell 211 is provided with an opening, and the end cover 212 covers the opening and is provided with the first wall 201.

[0242] The shell 211 can refer to the main part of the shell component 21, which is internally provided with a cavity, and the opening is in communication with the cavity.

[0243] The end cover 212 can refer to a plate-shaped component, which is covered on the opening to form a closed containing space inside the shell component 21 for placing the electrode component 22 and the electrolyte.

[0244] In the above technical solution, the first wall 201 can be provided on the end cover 212 of the shell component 21, so that the pole column component 23 can be first installed on the end cover 212, and then installed on the shell 211 together with the end cover 212. In this way, the assembly difficulty of the pole column component 23 can be reduced, the manufacturability can be improved, and the product yield can be improved. Moreover, since the thickness of the end cover 212 is usually greater than the thickness of the shell 211, the end cover 212 can provide better support for the pole column component 23 and better constrain the pole column component 23, thereby reducing the probability of deformation or damage of the pole column component 23 due to large stress. In addition, the pole column component 23 is also easier to seal through the sealing ring on the end cover 212, thereby reducing the risk of electrolyte leakage. That is, the above solution can improve the reliability of the pole column component 23 and the reliability of the battery monomer 20.

[0245] In some embodiments of the present application, referring to Figure 22, the shell component 21 comprises a shell 211 and an end cover 212, the shell 211 is provided with an opening and is provided with the first wall 201, and the end cover 212 covers the opening.

[0246] In the above technical solution, the first wall 201 can be provided on the shell 211 of the shell component 21, so that the pole column component 23 can be directly installed on the shell 211. Since the pole column component 23 does not occupy the space of the end cover 212, the space layout inside the shell 211 can be more compact, which is conducive to improving the energy density of the battery monomer 20. The above solution can also reduce the structural complexity of the end cover 212 and reduce the assembly difficulty of the end cover 212, thereby reducing the situation of electrolyte leakage caused by improper assembly of the end cover 212, and further improving the reliability of the battery monomer 20.

[0247] Referring to Figures 17 and 18, the battery monomer 20 provided by the embodiments of the present application comprises a shell component 21, an electrode component 22 and a pole column component 23.

[0248] The pole column component 23 is in the shape of a runway as a whole, and comprises a pole column body 231 and a welded pressing ring. The welded pressing ring is arranged around the circumference of the pole column body 231, and comprises a vertical arm 2321 and a horizontal arm 2322 which are perpendicular to each other. The vertical arm 2321 is provided with a plurality of through holes on the circumferential side thereof, and the pole column body 231 is provided with a plurality of protruding teeth on the circumferential side thereof. The plurality of protruding teeth and the plurality of through holes are in one-to-one correspondence, and the protruding teeth extend into the through holes. Since the pole column body 231 and the vertical arm 2321 form a meshing structure which cooperates with each other, the pole column body 231 and the vertical arm 2321 are filled with a plastic member by injection molding, so as to insulate the pole column body 231 and the vertical arm 2321, and insulate the protruding teeth and the through holes.

[0249] The horizontal arm 2322 can be mounted in the mounting hole 201a of the first wall 201 of the shell component 21 and welded with the first wall 201. Alternatively, the pole column component 23 further comprises an adapter plate, the horizontal arm 2322 is welded with the adapter plate, and the adapter plate is mounted in the mounting hole 201a of the first wall 201 of the shell component 21 and welded with the first wall 201.

[0250] Referring to FIGS. 19 and 20, the battery monomer 20 provided by another embodiment of the present application is substantially the same as the battery monomer 20 of the above-mentioned embodiment in structure, except that the pole column component 23 is in the shape of a circle as a whole.

[0251] The embodiments of the present application further provide a battery device 100 comprising the battery monomer 20 according to any one of the preceding embodiments.

[0252] In the above technical solution, since the pole column component 23 of the battery monomer 20 has high structural strength, the pole column component 23 can withstand a large external force during use of the battery device 100, and the probability of rupture or damage is relatively high. Therefore, the battery monomer 20 can have high reliability, and the reliability of the battery device 100 can be improved.

[0253] The embodiments of the present application further provide a power consumption device 1000 comprising the battery monomer 20 according to any one of the preceding embodiments, or the battery device 100 according to the preceding embodiment.

[0254] In the above technical solution, since the pole column component 23 of the battery monomer 20 has high structural strength, the pole column component 23 can withstand a large external force, and the probability of rupture or damage is relatively high. Therefore, the battery monomer 20 can have high reliability, and the battery device 100 using the battery monomer 20 also has high reliability. Therefore, the reliability of the power consumption device 1000 comprising the battery monomer 20 or the battery device 100 can be improved.

[0255] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0256] The above merely describes preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, all the embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions, if not specifically described. All the technical features and optional technical features of the present application can be combined with each other to form new technical solutions, if not specifically described. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery cell, wherein, The application relates to a shell component, an electrode component, and a pole component. The shell component comprises a first wall provided with a mounting hole. The electrode component is accommodated in the shell component. The pole component is mounted at the mounting hole and comprises a pole body connected to the electrode component, a connecting component connected to the first wall, and a first insulation member insulatingly connected to the pole body. The connecting component comprises a vertical arm extending away from the first wall, and a projection of the vertical arm on the first wall at least partially overlaps a projection of the pole body on the first wall along a thickness direction of the first wall.

2. The battery cell of claim 1, wherein, The projection of the vertical arm on the first wall along the thickness direction of the first wall has a first inner contour and a first outer contour. The projection of the pole body on the first wall along the thickness direction of the first wall has a second outer contour. At least part of the first inner contour is located in the second outer contour.

3. The battery cell of claim 2, wherein, At least part of the second outer contour is located in the first outer contour.

4. The battery cell of claim 3, wherein, Part of the first inner contour is located in the first outer contour, and all of the second outer contour is located in the first outer contour.

5. The battery cell of any one of claims 1 to 4, wherein, The vertical arm is arranged around the pole body in a circumferential direction, a circumferential side of one of the vertical arm and the pole body is provided with a recess, and a circumferential side of the other of the vertical arm and the pole body is provided with a protrusion, at least part of the protrusion extends into the recess, and the recess and the protrusion are insulatingly connected by the first insulation member.

6. The battery cell of any one of claims 1 to 5, wherein, The connecting component and the first wall are integrally formed.

7. The battery cell of any one of claims 1 to 6, wherein, The vertical arm is perpendicular to the first wall.

8. The battery cell of any one of claims 1 to 7, wherein, The connecting component comprises a horizontal arm arranged around the pole body and connected to the vertical arm and the first wall, and the horizontal arm and the vertical arm are arranged at an angle.

9. The battery cell of any one of claims 1 to 8, wherein, The connecting component comprises a horizontal arm arranged around the pole body and connected to the vertical arm, and a transfer member arranged around the pole body and connected to the horizontal arm and the first wall.

10. The battery cell of claim 8 or 9, wherein, The horizontal arm is perpendicular to the vertical arm.

11. The battery cell of claim 5, wherein, The pole body is provided with the protrusion, the vertical arm is provided with the recess, the recess penetrates the vertical arm in a 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 of claim 11, wherein, The connecting component comprises a horizontal arm connected to the vertical arm and provided with a avoiding slot communicating with the recess.

13. The battery cell of claim 12, wherein, The avoiding slot penetrates the horizontal arm in a direction away from the electrode component.

14. The battery cell of claim 13, wherein, The first insulation member comprises: an outer ring portion wrapped on a side of the vertical arm 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 recess and the protrusion and connected to the outer ring portion and the inner ring portion; a second extension portion arranged in the avoiding slot and connected to the outer ring portion and the inner ring portion.

15. The battery cell of claim 14, wherein, The outer ring portion, the inner ring portion, the first extension portion, and the second extension portion are integrally injection molded.

16. The battery cell of claim 14, wherein, The inner ring portion, the first extension portion and the second extension portion are integrally injection molded, and the outer ring portion is injection molded and connected to the inner ring portion.

17. The battery cell of any one of claims 1-16, wherein, The connecting member includes a cantilevered arm provided at an end of the vertical arm away from the first wall and extending toward a side close to the pole body.

18. The battery cell of any one of claims 1-17, wherein, The pole member includes a sealing member surrounding the pole body and sealed between the pole body and the connecting member.

19. The battery cell of claim 18, wherein, The sealing member and the first insulating member are integrally formed.

20. The battery cell of any one of claims 1-19, wherein, The pole member includes a second insulating member surrounding the pole body and covering a side of the connecting member toward the inside of the housing member and connected to the connecting member.

21. The battery cell of claim 20, wherein, 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 of claim 20 or 21, wherein, The second insulating member and the first insulating member are integrally formed.

23. The battery cell of any one of claims 20-22, wherein, The pole member includes a sealing member surrounding the pole body and sealed between the pole body and the connecting member, and the sealing member, the first insulating member and the second insulating member are integrally formed.

24. The battery cell of any one of claims 20-23, wherein, The battery cell includes a third insulating member covering a side of the first wall toward the inside of the housing member, the third insulating member is provided with a fitting hole corresponding to the mounting hole, and a reference plane parallel to the first wall, an edge of a normal projection of the fitting hole on the reference plane is located within a normal projection of the second insulating member on the reference plane.

25. The battery cell of claim 24, wherein, The second insulating member and the connecting member are detachably connected, the third insulating member is provided with a limiting portion extending toward a side of the pole body and located at a side of the second insulating member close to the pole member.

26. The battery cell of any one of claims 1-4, wherein, The vertical arm is connected to the first wall at a side away from the pole body, the pole body is provided with a protrusion at a circumferential side, the vertical arm has a stop end facing the inside of the housing member, and the stop end is connected to the protrusion through the first insulating member.

27. The battery cell of any one of claims 1-26, wherein, The housing member includes a housing and an end cover, the housing is provided with an opening, the end cover is provided on the opening and provided with the first wall.

28. The battery cell of any one of claims 1-26, wherein, The housing member includes a housing and an end cover, the housing is provided with an opening and provided with the first wall, and the end cover is provided on the opening.

29. A battery device, wherein, The battery cell includes the battery cell as claimed in any one of claims 1 to 28.

30. An electrical device, comprising: The battery device includes the battery cell as claimed in any one of claims 1 to 28 or the battery device as claimed in claim 29.

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