End cover assembly, battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides an end cover assembly, a battery and electric equipment, the end cover assembly comprises a cover plate, a pole, a first insulating part and a second insulating part, the cover plate is provided with a mounting cavity, the pole is arranged in the mounting cavity, the first insulating part is arranged in the mounting cavity and is integrally formed between the cover plate and the pole through nanometer injection molding, and the second insulating part is arranged in the mounting cavity. The second insulating part is arranged on one side of the cover plate and connected with the first insulating part. By reducing the use of the riveting blocks, the height of the pole protruding out of the cover plate can be effectively reduced, so that the purpose of reducing the overall thickness of the end cover assembly is achieved, the overall height of the battery using the end cover assembly is further reduced, the miniaturization design of the battery is facilitated, and the energy density of the battery is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to an end cover assembly, a battery and an electrical device. Background Art

[0002] In the prior art, a cylindrical battery includes an end cap assembly, a housing, and a battery cell installed in the housing, wherein the end cap assembly is sealed and connected to the housing to cover the battery cell. The end cap assembly usually adopts a riveted structure, has many parts, and is costly.

[0003] Please combine the specific Figure 1 The existing end cap assembly 100 includes a cover plate 10, and a first insulating member 30 and a second insulating member 40 are respectively arranged on the upper and lower sides of the cover plate 10, wherein the direction of the cover plate 10 away from the battery cell is upward, and the direction of the cover plate 10 close to the battery cell is downward. A rivet block 60 is arranged above the first insulating member 30, and the pole 20 passes through the second insulating member 40, the cover plate 10, the first insulating member 30 and the rivet block 60 in sequence from the bottom of the second insulating member 40, and is finally riveted with the rivet block 60. The diameter of the lower end of the pole 20 is greater than the diameter of the upper end of the pole 20, and the lower end of the pole 20 presses the second insulating member 40 against the lower surface of the cover plate 10 to insulate the pole 20 from the cover plate 10. A sealing ring 50 is arranged between the pole 20 and the cover plate 10. The upper surface of the rivet block 60 is used to weld the busbar to electrically connect the two cylindrical batteries, thereby forming a battery module with multiple cylindrical batteries.

[0004] Since a certain welding depth needs to be met between the rivet block 60 and the busbar, the existing rivet block 60 needs to meet a certain thickness, resulting in a thicker end cover assembly 100, which in turn results in a taller battery as a whole, that is, the battery is longer in the up and down directions, which is not conducive to the miniaturization design of the battery, nor is it conducive to meeting the requirements of high energy density of the battery. Utility Model Content

[0005] The utility model aims to provide an end cover assembly, a battery and an electrical device, aiming to solve the technical problems that the existing end cover assembly is not conducive to the miniaturization design of the battery and is not conducive to meeting the high energy density requirements of the battery.

[0006] In a first aspect, the present application provides an end cover assembly, including a cover plate, a pole, a first insulating member and a second insulating member, the cover plate is provided with an installation cavity, the pole is provided in the installation cavity, the first insulating member is provided in the installation cavity, and is integrally formed between the cover plate and the pole by nano injection molding, and the second insulating member is provided on one side of the cover plate and connected to the first insulating member.

[0007] Optionally, the pole includes a first pole section and a second pole section connected to each other, the first pole section is located on a side of the installation cavity away from the second insulating member, the second pole section is located on a side of the installation cavity close to the second insulating member, and the diameter of the first pole section is greater than the diameter of the second pole section.

[0008] Optionally, the pole further includes an intermediate pole section connected between the first pole section and the second pole section, the intermediate pole section is provided with a first recessed portion, and the first insulating member has a protruding portion connected to the first recessed portion.

[0009] Optionally, the diameter of the first column section is larger than the diameter of the installation cavity, and the diameter of the second column section is smaller than the diameter of the installation cavity.

[0010] Optionally, at least a portion of the second column segment is located within the mounting cavity.

[0011] Optionally, the installation cavity includes a first cavity segment and a second cavity segment, the first cavity segment is located on a side of the second cavity segment away from the second insulating member, a plane perpendicular to the thickness direction of the cover plate is defined as the center plane, and a projection of the second cavity segment on the center plane falls within the projection of the first cavity segment on the center plane.

[0012] Optionally, the cover plate is further provided with at least one second recess, and the first insulating member has a stopper connected to the second recess.

[0013] Optionally, a first connection structure is provided on a surface of the second insulating member facing the first insulating member, and a second connection structure is provided on the first insulating member, and the first connection structure is fixedly connected to the second connection structure.

[0014] Optionally, the first connection structure includes a connection groove, and the second connection structure includes a connection protrusion connected to the connection groove by heat melting.

[0015] Optionally, the first connection structure includes a connection slot, and the second connection structure includes a connection buckle that is engaged with the connection slot.

[0016] Optionally, the material of the first insulating member is PPS, and the material of the second insulating member is PP.

[0017] In a second aspect, the present application provides a battery, comprising a shell, a battery cell and the above-mentioned end cover assembly, wherein the battery cell is installed in the shell, and the end cover assembly seals one side of the shell.

[0018] In a third aspect, the present application provides an electrical device including the above-mentioned battery.

[0019] The beneficial effect of the end cap assembly provided by the utility model is that compared with the existing end cap assembly adopting the riveted structure, the end cap assembly of the utility model forms the first insulating member between the cover plate and the pole through the nano injection molding process. On the one hand, the use of the riveted block is omitted, which can effectively reduce the height of the pole protruding from the cover plate, thereby achieving the purpose of reducing the overall thickness of the end cap assembly, and then reducing the overall height of the battery using the end cap assembly, which is conducive to the miniaturization design of the battery and effectively improves the energy density of the battery. On the other hand, the use of the sealing ring is omitted, which can reduce the production cost and assembly difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a structural schematic diagram of an end cover assembly in the prior art;

[0022] Figure 2 A cross-sectional view of an end cap assembly provided in an embodiment of the utility model;

[0023] Figure 3 An exploded view of an end cover assembly provided in an embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the structure of the end cover assembly provided in an embodiment of the utility model;

[0025] Figure 5 Another structural schematic diagram of the end cover assembly provided by the embodiment of the utility model;

[0026] Figure 6 A schematic diagram of the structure of a pole provided by an embodiment of the utility model;

[0027] Figure 7 A schematic structural diagram of a first insulating member provided in an embodiment of the utility model;

[0028] Figure 8 A schematic diagram of the structure of a second insulating member provided in an embodiment of the utility model;

[0029] Fig. 9 Another cross-sectional view of the end cap assembly provided by the embodiment of the utility model;

[0030] Fig.10 for Fig. 9 A magnified view of middle;

[0031] Fig.11 Another structural schematic diagram of the first insulating member provided in an embodiment of the utility model;

[0032] Fig.12 Another structural schematic diagram of the second insulating member provided in an embodiment of the utility model;

[0033] Fig.13 Another structural schematic diagram of the end cover assembly provided by the embodiment of the utility model;

[0034] Fig.14 Another cross-sectional view of the end cover assembly provided in the embodiment of the utility model.

[0035] Among them, the reference numerals in the figure are:

[0036] 100, end cover assembly; 10, cover plate; 20, pole;

[0037] 30. first insulating member; 40. second insulating member; 50. sealing ring;

[0038] 60. Riveting block; 11. Mounting cavity; 12. Second recess;

[0039] 111, first cavity section; 112, second cavity section; 21, first column section;

[0040] 22. middle column section; 23. second column section; 221. first recess;

[0041] 31. protrusion; 32. stopper; 33. connecting protrusion;

[0042] 34. Connecting buckle; 331. Boss; 41. Connecting groove;

[0043] 42. Connecting slot; 43. Through hole; 44. Supporting portion;

[0044] 411. Expansion part. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0046] Reference throughout the specification to "one embodiment" or "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 present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0047] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The end cover assembly 100, the battery and the electrical equipment in the embodiment of the utility model are now described.

[0051] The present application provides a battery, including a shell, a battery cell and an end cap assembly 100, wherein the battery cell is installed in the shell, and the end cap assembly 100 seals one side of the shell. Specifically, the battery also includes a current collecting plate, which is located between the battery cell and the end cap assembly 100, the battery cell is electrically connected to the current collecting plate, and the pole 20 in the end cap assembly 100 is electrically connected to the current collecting plate.

[0052] As mentioned in the background art, the existing battery has a thicker end cover assembly 100 as a whole, which results in the battery being taller as a whole, which is not conducive to the miniaturization design of the battery and is not conducive to meeting the requirements of high energy density of the battery.

[0053] To this end, the present application provides an end cap assembly 100, which has a thinner overall thickness than the existing end cap assembly 100. The battery provided by the present application can be smaller due to the use of the end cap assembly 100 provided by the present application, which is beneficial to improving the energy density of the battery.

[0054] Generally, a battery module includes a box and a plurality of batteries installed in the box, and the plurality of batteries are connected in series and / or in parallel. That is, for a battery module, the overall height of the batteries is reduced, which can improve the utilization rate of the internal space of the battery module.

[0055] For ease of description and understanding, please refer to Figure 2 , define Z1 direction as downward and Z2 direction as upward.

[0056] Please refer to Figures 2 to 5 The end cap assembly 100 provided in the present application includes a cover plate 10, a pole 20, a first insulating member 30 and a second insulating member 40. The cover plate 10 is provided with an installation cavity 11, the pole 20 is provided in the installation cavity 11, the first insulating member 30 is provided in the installation cavity 11, and is integrally formed between the cover plate 10 and the pole 20 by nano injection molding, and the second insulating member 40 is provided on one side of the cover plate 10 and connected to the first insulating member 30. Specifically, the cover plate 10 is sealed on one side of the shell, the second insulating member 40 is located in the shell and abuts against the lower surface of the cover plate 10, and the installation cavity 11 is opened on the upper surface of the cover plate 10 and passes through the lower surface of the cover plate 10. The first insulating member 30 is used to electrically isolate the pole 20 from the cover plate 10 to avoid short circuit of the battery using the end cap assembly 100.

[0057] Please combine Figure 1 In the end cap assembly 100, the first insulating member 30 is formed between the cover plate 10 and the pole 20 by a nano injection molding process. On the one hand, the use of the rivet block 60 is omitted, which can effectively reduce the height of the pole 20 protruding from the upper surface of the cover plate 10, thereby achieving the purpose of reducing the overall thickness of the end cap assembly 100. On the other hand, the use of the sealing ring 50 is omitted, which can reduce the production cost and assembly difficulty.

[0058] In another embodiment of the present application, please refer to Figure 2 and Figure 6 The pole 20 includes a first pole section 21 and a second pole section 23 connected to each other. The first pole section 21 is located on a side of the installation cavity 11 away from the second insulating member 40, and the second pole section 23 is located on a side of the installation cavity 11 close to the second insulating member 40. Specifically, the first pole section 21 is connected to the upper side of the second pole section 23, the first pole section 21 is located above the installation cavity 11, and the second pole section 23 is located below the installation cavity 11.

[0059] It is understandable that the diameter of the first column segment 21 may be larger than the diameter of the second column segment 23 , or may be smaller than the diameter of the second column segment 23 .

[0060] In the embodiment in which the diameter of the first column segment 21 is smaller than the diameter of the second column segment 23 , the second column segment 23 presses the first insulating member 30 against the lower surface of the cover plate 10 , so that the thickness below the cover plate 10 includes not only the thickness of the first insulating member 30 , but also the thickness of the second column segment 23 .

[0061] In this embodiment, the diameter of the first column section 21 is greater than the diameter of the second column section 23. Compared with the embodiment in which the diameter of the first column section 21 is smaller than the diameter of the second column section 23, the second column section 23 does not need to press the first insulating member 30, that is, the thickness of the structure used to press the first insulating member 30 is omitted, which can effectively reduce the thickness below the cover plate 10. In this way, on the one hand, the overall thickness of the end cap assembly 100 can be further reduced. On the other hand, in the battery, the direction of the cover plate 10 close to the battery cell is the bottom of the cover plate 10. Reducing the thickness below the cover plate 10 can save the Z-direction space inside the battery, so that the battery can be further miniaturized. In addition, it is also beneficial to improve the energy density of the battery.

[0062] After the end cap assembly 100 is assembled into a battery with other components, such as a housing and a battery cell, the end cap assembly 100 sometimes needs to withstand a force in the Z1 direction. For example, when a busbar is welded on the first column segment 21, the first column segment 21 needs to withstand a press-fitting force in the Z1 direction. In the embodiment in which the diameter of the first column segment 21 is smaller than the diameter of the second column segment 23, the pole 20 is easily separated from the first insulating member 30 under the action of the thrust in the Z1 direction. In the embodiment in which the diameter of the first column segment 21 is larger than the diameter of the second column segment 23, when the pole 20 is subjected to a thrust in the Z1 direction, the first column segment 21 squeezes the first insulating member 30 and the cover plate 10 in turn, that is, the first column segment 21 is stuck on the first insulating member 30. In this way, on the one hand, the ability of the pole 20 to withstand the thrust in the Z1 direction can be improved, and on the other hand, the risk of the pole 20 being separated from the first insulating member 30 is greatly reduced.

[0063] Among them, busbar refers to a connecting bar with a multi-layer composite structure, also called a composite busbar, busbar, bar sheet, aluminum sheet, etc., which can be used to achieve electrical connection between two batteries.

[0064] In another embodiment of the present application, please refer to Figure 2 and Figure 6The pole 20 further includes an intermediate pole section 22 connected between the first pole section 21 and the second pole section 23, the intermediate pole section 22 is provided with a first recess 221, and the first insulating member 30 has a protrusion 31 connected to the first recess 221. Specifically, the first pole section 21, the intermediate pole section 22 and the second pole section 23 are sequentially connected from top to bottom, and the diameter of the first pole section 21 is greater than the diameter of the intermediate pole section 22. The first recess 221 is provided on the outer circumferential surface of the intermediate pole section 22, and the first recess 221 is connected end to end and is arranged around the intermediate pole section 22 along the circumferential direction of the intermediate pole section 22.

[0065] In some other embodiments, the first recess 221 may be disconnected at both ends, for example, the first recess 221 does not surround the middle column section 22. For another example, the first recess 221 is arranged in a thread shape around the outer circumference of the middle column section 22, which is not limited here.

[0066] In some other embodiments, at least two first recesses 221 are provided, and all first recesses 221 are arranged at intervals along a predetermined direction, for example, all first recesses 221 are arranged at intervals along the up-down direction. For another example, all first recesses 221 are arranged at intervals along the circumference of the middle column section 22. Of course, all first recesses 221 can also be arranged at intervals along other directions, which is not limited here.

[0067] By providing the first recess 221 on the outer circumferential surface of the middle column section 22, the first insulating member 30 is formed with a protrusion 31 inserted into the first recess 221. In this way, on the one hand, the movement of the pole 20 in the Z1 direction and the Z2 direction can be restricted, further reducing the risk of the pole 20 being separated from the first insulating member 30. On the other hand, the contact surface path between the pole 20 and the first insulating member 30 is increased, making the leakage path of the electrolyte in the battery more complicated, effectively reducing the risk of electrolyte leakage.

[0068] In another embodiment of the present application, please refer to Figure 2 , the diameter of the first column section 21 is larger than the diameter of the installation cavity 11, and the diameter of the second column section 23 is smaller than the diameter of the installation cavity 11. In the nano injection molding process, the pole 20 is inserted into the installation cavity 11 from the top of the cover plate 10. The diameter of the first column section 21 is larger than the diameter of the installation cavity 11, so that there is a facing area between the first column section 21 and the cover plate 10. When the pole 20 is subjected to a thrust in the Z1 direction, the deformation of the inner edge of the cover plate 10, that is, the edge of the installation cavity 11 of the cover plate 10, can be reduced, which is beneficial to improve the service life of the end cover assembly 100.

[0069] In another embodiment of the present application, please refer to Figure 2, at least part of the second column section 23 is located in the mounting cavity 11. In this way, when the thickness of the second column section 23 is the same, the thickness of the second column section 23 protruding below the cover plate 10 can be reduced, which is conducive to saving the Z-direction space inside the battery.

[0070] In another embodiment of the present application, please refer to Figure 3 The mounting cavity 11 includes a first cavity section 111 and a second cavity section 112. The first cavity section 111 is located on the side of the second cavity section 112 away from the second insulating member 40. The plane perpendicular to the thickness direction of the cover plate 10 is defined as the central plane. The projection of the second cavity section 112 on the central plane falls within the projection of the first cavity section 111 on the central plane. Specifically, the thickness direction of the cover plate 10 is parallel to the up-down direction. The first cavity section 111 is located above the second cavity section 112. The cross-sections of the first cavity section 111 and the second cavity section 112 are both circular, and the diameter of the first cavity section 111 is greater than the diameter of the second cavity section 112. The arrangement of the first cavity section 111 enables the first column section 21 to be arranged closer to the second insulating member 40, that is, the thickness of the first column section 21 protruding above the cover plate 10 can be further reduced. This is conducive to reducing the overall thickness of the end cap assembly 100, thereby facilitating the miniaturization of the battery.

[0071] In some other embodiments, the cross-section of the first cavity segment 111 can be a regular shape, such as a rectangle, trapezoid or other polygon, or an irregular shape, as long as the projection of the second cavity segment 112 on the central plane falls within the projection of the first cavity segment 111 on the central plane, and no limitation is made here.

[0072] In another embodiment of the present application, please refer to Figure 2 , Figure 7 and Fig.11 , the cover plate 10 is also provided with at least one second recess 12, and the first insulating member 30 has a stopper 32 connected to the second recess 12. Specifically, the second recess 12 is provided on the inner wall surface of the second cavity section 112, the upper end of the second recess 12 penetrates the first cavity section 111 and communicates with the first cavity section 111, and the lower end of the second recess 12 penetrates the lower surface of the cover plate 10. By providing the second recess 12 on the second cavity section 112, the first insulating member 30 is formed with a stopper 32 inserted into the second recess 12. In this way, the first insulating member 30 can be limited from rotating relative to the cover plate 10, which greatly improves the stability and service life of the end cover assembly 100.

[0073] In another embodiment of the present application, the second recess 12 extends in the up-down direction. Of course, in some other embodiments, the second recess 12 may extend in a direction inclined to the up-down direction.

[0074] It is understandable that the number of the second recesses 12 may be one, two or more. In this embodiment, illustratively, the number of the second recesses 12 is four, and the four second recesses 12 are arranged at intervals along the circumference of the second cavity segment 112 .

[0075] Likewise, the cross section of the second recess 12 may be of a regular shape or an irregular shape, which is not limited herein.

[0076] In another embodiment of the present application, please refer to Figure 2 and Figure 3 , a first connecting structure is provided on the surface of the second insulating member 40 facing the first insulating member 30, the first insulating member 30 is provided with a second connecting structure, and the first connecting structure is fixedly connected to the second connecting structure. Specifically, the first connecting structure is provided on the upper surface of the second insulating member 40, and the first connecting structure is connected to the second connecting structure by snap-fitting or hot-melting. The first connecting structure is fixedly connected to the second connecting structure, which can limit the movement of the second insulating member 40 relative to the first insulating member 30 to ensure that the battery using the end cap assembly 100 can be used normally. The fixed connection between the first connecting structure and the second connecting structure is achieved by snap-fitting or hot-melting, which can reduce the difficulty of assembly.

[0077] In another embodiment of the present application, please refer to Figure 2 , Figure 5 , Figure 7 and Figure 8 , the first connection structure includes a connection groove 41, and the second connection structure includes a connection protrusion 33 connected to the connection groove 41 by heat melting. Specifically, the connection groove 41 is opened on the upper surface of the second insulating member 40 and penetrates the lower surface of the second insulating member 40 in the up-down direction. The connection protrusion 33 is arranged at the lower end of the first insulating member 30, and the connection protrusion 33 is inserted into the connection groove 41 and fixedly connected to the connection groove 41 by heat melting. This connection method can reduce the structural complexity of the first connection structure and the second connection structure, thereby reducing the difficulty of production.

[0078] The cross-section of the connecting groove 41 can be regular or irregular, and the shape of the connecting protrusion 33 is adapted to the shape of the connecting groove 41. For example, when the overall shape of the connecting groove 41 is cylindrical, the shape of the connecting protrusion 33 is also cylindrical, so as to improve the assembly quality and thus improve the connection stability.

[0079] The number of the connecting grooves 41 may be one, two or more, and similarly, the number of the connecting protrusions 33 may be one, two or more. By way of example, in this embodiment, four connecting grooves 41 and four connecting protrusions 33 are provided, and a through hole 43 is provided on the second insulating member 40, and the through hole 43 passes through the upper and lower surfaces of the second insulating member 40. The through hole 43 is provided corresponding to the second column section 23 to expose the second column section 23. The four connecting grooves 41 are arranged at intervals around the through hole 43, and the four connecting protrusions 33 correspond to the four connecting grooves 41 one by one.

[0080] In another embodiment of the present application, please refer to Fig. 9 and Fig.10 , the end of the connecting groove 41 close to the cover plate 10, that is, the upper end of the connecting groove 41 expands outward to form a flared portion 411, and the diameter of the flared portion 411 gradually increases from bottom to top. The connecting protrusion 33 is close to the end of the cover plate 10, that is, the upper end of the connecting protrusion 33 protrudes to form a boss 331, and the diameter of the boss 331 gradually increases from bottom to top. When the connecting protrusion 33 is hot-melt connected to the connecting groove 41, the boss 331 at the upper end of the connecting protrusion 33 is located in the flared portion 411 of the connecting groove 41. The projection of the boss 331 on the central plane is projection A, and the projection of the flared portion 411 on the central plane is projection B. Projection A and projection B at least partially overlap, that is, the flared portion 411 at least covers part of the boss 331. Such an arrangement ensures that the cover plate 10 is not exposed between the first insulating member 30 and the second insulating member 40 , thereby reducing the possibility of foreign matter overlapping the cover plate 10 , thereby improving the insulation performance between the collecting plate and the cover plate 10 .

[0081] In another embodiment of the present application, please refer to Figures 11 to 14 The first connection structure includes a connection slot 42, and the second connection structure includes a connection buckle 34 that is engaged with the connection slot 42. Specifically, the connection slot 42 is provided on the upper surface of the second insulating member 40 and passes through the lower surface of the second insulating member 40, and the connection buckle 34 is provided at the lower end of the first insulating member 30. Compared with the hot melt connection method, the clamping method adopted in this embodiment can reduce the use of hot melt tools, thereby improving assembly efficiency.

[0082] In another embodiment of the present application, the material of the first insulating member 30 is PPS, and the material of the second insulating member 40 is PP. Compared with PP, PPS has the advantages of high temperature resistance and corrosion resistance. The first insulating member 30 is nano-injection molded between the pole 20 and the cover plate 10. In order to meet the high strength requirements of the first insulating member 30, the material of the first insulating member 30 is PPS. As for the second insulating member 40, its strength requirement is not high, so relatively cheap PP is selected. In this way, the production cost of the end cap assembly 100 is greatly reduced.

[0083] In another embodiment of the present application, please refer to Figure 8 and Fig.12 The lower surface of the second insulating member 40 is raised to form a support portion 44, which is arranged corresponding to the connecting groove 41 or the connecting slot 42, and the connecting groove 41 or the connecting slot 42 passes through the support portion 44. The support portion 44 is used to support the current collecting plate, which is used to be welded to the tab of the battery cell. The setting of the support portion 44 can prevent the current collecting plate from pulling the tab due to vibration.

[0084] It is understandable that the pole 20 can be an aluminum pole 20, or a copper-aluminum composite pole 20, etc. The material of the cover plate 10 can be aluminum, or other materials such as steel. The material of the pole 20 and the material of the cover plate 10 are not particularly limited here.

[0085] The present application also provides an electric device, including the above-mentioned battery. The battery used in the electric device adopts the above-mentioned end cover assembly 100, so that the electric device can accommodate the battery in a smaller space, which is conducive to improving the space utilization rate of the electric device.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An end cap assembly, characterized in that: include: A cover plate (10), wherein the cover plate (10) is provided with a mounting cavity (11); A pole (20) is arranged in the installation cavity (11); A first insulating member (30) is disposed in the mounting cavity (11) and is integrally formed between the cover plate (10) and the pole (20) by nano injection molding; A second insulating member (40) is disposed on one side of the cover plate (10) and is connected to the first insulating member (30).

2. The end cap assembly according to claim 1, characterized in that: The pole (20) comprises a first pole section (21) and a second pole section (23) which are connected to each other; the first pole section (21) is located on a side of the installation cavity (11) away from the second insulating member (40); the second pole section (23) is located on a side of the installation cavity (11) close to the second insulating member (40); and the diameter of the first pole section (21) is greater than the diameter of the second pole section (23).

3. The end cap assembly according to claim 2, characterized in that: The pole (20) satisfies at least one of the following conditions: The pole (20) further comprises an intermediate pole section (22) connected between the first pole section (21) and the second pole section (23); the intermediate pole section (22) is provided with a first recess (221); and the first insulating member (30) has a protrusion (31) connected to the first recess (221); The diameter of the first column section (21) is greater than the diameter of the installation cavity (11), and the diameter of the second column section (23) is smaller than the diameter of the installation cavity (11); At least a portion of the second column section (23) is located in the installation cavity (11).

4. The end cap assembly according to claim 1, characterized in that: The installation cavity (11) comprises a first cavity section (111) and a second cavity section (112); the first cavity section (111) is located on a side of the second cavity section (112) away from the second insulating member (40); a plane perpendicular to the thickness direction of the cover plate (10) is defined as a central plane; a projection of the second cavity section (112) on the central plane falls within a projection of the first cavity section (111) on the central plane.

5. The end cap assembly according to claim 1, characterized in that: The cover plate (10) is further provided with at least one second recess (12), and the first insulating member (30) has a stopper (32) connected to the second recess (12).

6. The end cap assembly according to claim 1, characterized in that: A first connection structure is provided on the surface of the second insulating member (40) facing the first insulating member (30), and the first insulating member (30) is provided with a second connection structure, and the first connection structure is fixedly connected to the second connection structure.

7. The end cap assembly according to claim 6, characterized in that: The first connection structure comprises a connection groove (41), and the second connection structure comprises a connection protrusion (33) connected to the connection groove (41) by thermal melting; Alternatively, the first connection structure comprises a connection slot (42), and the second connection structure comprises a connection buckle (34) that is snap-connected to the connection slot (42).

8. The end cap assembly according to claim 1, characterized in that: The material of the first insulating member (30) is PPS, and the material of the second insulating member (40) is PP.

9. A battery, characterized in that: The invention comprises a shell, a battery cell and an end cover assembly (100) according to any one of claims 1 to 8, wherein the battery cell is installed in the shell, and the end cover assembly (100) seals one side of the shell.

10. An electrical equipment, characterized in that: A battery comprising the battery of claim 9.

Images