Pole, cover plate assembly and battery

Abstract

The utility model discloses a pole, a cover plate assembly and a battery, the pole comprises a pole body and a shell arranged around the pole body, and the shell and the pole body are insulated from each other; the shell comprises a shell body and an edge part, the shell body is arranged in the circumferential direction of the pole body, and the edge part extends from the shell body to the end part of the pole body; the shell body and the edge part are coated outside the pole column body, and at least part of the circumferential direction and the end part of the pole column body is limited in the shell. By arranging the shell on the pole body, welding installation between the pole body and the cover plate sheet can be conveniently achieved, the welding effect is improved, displacement of the pole body is prevented, the lap joint risk is reduced, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present application generally relates to the field of battery technology, and specifically to a pole, a cover plate assembly and a battery. Background Art

[0002] As the core components of power lithium batteries, the performance and function of battery structural parts are particularly important in the entire battery.

[0003] For square batteries, the cover is the most critical part of the battery structure. Among them, the battery pole is one of the important components in the battery structure. The insulation and sealing performance of the pole assembly and the cover as a whole affect the quality of the entire battery structure and even the quality of the entire battery. Poor insulation performance can easily cause battery short circuit, and poor sealing performance can easily cause electrolyte leakage and cause safety accidents.

[0004] However, the seal between the pole and the cover plate in the current battery structure is generally made by injection molding, which is costly. When the pole is welded to the busbar laser welding, the injection molding material of the top cover plate is easily melted, causing displacement of the pole, which in turn causes the risk of overlap and safety hazards. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a pole, a cover plate assembly and a battery, which can achieve sealing of the pole body and facilitate installation of the pole body.

[0006] In a first aspect, the present application provides a pole, the pole comprising: a pole body and a shell arranged around the pole body, wherein the shell and the pole body are insulated from each other;

[0007] The shell includes a shell body and an edge portion, the shell body is arranged around the circumference of the pole body, the edge portion extends from the shell body to the end of the pole body, the shell body and the edge portion are covered outside the pole body and at least part of the circumference and end of the pole body is restricted within the shell.

[0008] Optionally, the pole body includes a pole plate and a pole body, the pole plate includes a first surface and a second surface that are oppositely arranged, the pole body is arranged on the second surface, the pole plate is arranged in the shell and the first surface abuts the edge portion.

[0009] Optionally, one of the edge portions is a clamping portion, and the other edge portion is a supporting portion, a portion of the pole body is located between the clamping portion and the supporting portion, the clamping portion and the supporting portion clamp a portion of the pole body, and one end of the pole body protrudes from the clamping portion in the extension direction of the pole body.

[0010] The shell body, the supporting portion, and the pressing portion enclose a mounting cavity, the pole plate is placed in the mounting cavity, the pressing portion is pressed on the second surface, the supporting portion abuts against the first surface, and one end of the pole body protrudes from the mounting cavity.

[0011] Optionally, an insulating layer is provided between the shell and the pole body, and the insulating layer is provided on the surface of the shell and / or the pole body.

[0012] Optionally, an insulating member is further included, wherein the insulating member is sleeved between the pole body and the pressing portion, and is pressed onto the pole plate by the pressing portion.

[0013] Optionally, the insulating member includes a first insulating portion and a second insulating portion, two sides of the first insulating portion respectively abut against the second surface of the electrode plate and the pressing portion, and two sides of the second insulating portion respectively abut against the pressing portion and the electrode body.

[0014] Optionally, a seal is further included, which is arranged between the pole body and the support portion, and is used to insulate and seal the pole body and the support portion.

[0015] Optionally, an annular groove for fixing the sealing member is provided on the supporting portion, and a protrusion engaged with the annular groove is provided on the sealing member.

[0016] Optionally, an annular protrusion for fixing the sealing member is provided on the supporting portion; and a clamping groove for clamping with the annular protrusion is provided on the sealing member.

[0017] Optionally, the pressing portion is a bendable structure, and the end of the pressing portion is bent to form at least one laminated layer, and the laminated layer presses the pole body to the support portion;

[0018] Preferably, the stacked layers include at least two layers, and the bending directions of two adjacent stacked layers are opposite.

[0019] In a second aspect, the present application provides a cover plate assembly, comprising a cover plate sheet and a pole as described above, wherein at least one pole hole is provided on the cover plate sheet, and a shell of the pole is welded in the pole hole.

[0020] Optionally, the pole hole is a stepped hole, the pole hole includes a stepped platform, and the edge portion is welded to the stepped platform.

[0021] Optionally, it further comprises a plastic part arranged on a side of the cover plate away from the pole, and the plastic part is provided with a via hole matching the pole hole.

[0022] In a third aspect, the present application provides a battery, comprising a housing and a cover assembly as described above that is sealed to the housing.

[0023] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0024] The pole provided in the embodiment of the present application is convenient for welding and installation between the pole body and the cover plate by providing a shell on the pole body, thereby improving the welding effect, avoiding the displacement of the pole body caused by the melting of the injection material when the existing injection-molded top cover is welded to the pole, reducing the risk of overlap and reducing safety hazards; the edge portion is extended from the shell body to the end of the pole body, the shell body and the edge portion are covered outside the pole body and the circumference and end of the pole body are at least partially restricted in the shell, which can ensure the stability of the relative position of the pole body and protect the pole body, reduce the number of parts, reduce the positioning and assembly requirements, improve the assembly accuracy, and reduce the assembly cost of the pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 A schematic diagram of the structure of a pole provided in an embodiment of the present application;

[0027] Figure 2 An exploded schematic diagram of a pole provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure of a pole body provided in an embodiment of the present application;

[0029] Figure 4 A partially cutaway schematic diagram of a housing provided in an embodiment of the present application;

[0030] Figure 5 A partially cutaway schematic diagram of a pole provided in an embodiment of the present application;

[0031] Figure 6 A schematic cross-sectional view of a pole provided in an embodiment of the present application;

[0032] Figure 7 A schematic structural diagram of a sealing member provided in an embodiment of the present application;

[0033] Figure 8 A schematic structural diagram of a cover plate assembly provided in an embodiment of the present application;

[0034] Fig. 9A cross-sectional schematic diagram of a cover plate assembly provided in an embodiment of the present application;

[0035] Fig.10 An enlarged cross-sectional schematic diagram of a cover plate assembly provided in an embodiment of the present application.

[0036] In the figure:

[0037] 100, housing; 200, pole body; 300, insulating member; 400, sealing member;

[0038] 110, housing body; 120, edge portion; 121, pressing portion; 122, supporting portion; 1201, first through hole; 1202, second through hole;

[0039] 130, annular portion; 140, annular groove; 150, annular protrusion; 160, lamination layer; 141, first bottom surface; 151, first top surface;

[0040] 210, polar plate; 220, polar body; 211, first surface; 212, second surface; 221, middle hole; 222, opening;

[0041] 310, first insulating portion; 320, second insulating portion; 330, third through hole;

[0042] 410, first sealing portion; 420, second sealing portion; 430, protrusion; 440, slot; 450, fourth through hole; 401, first sealing surface; 402, second sealing surface; 441, second bottom surface; 431, second top surface; 421, third top surface;

[0043] 500, cover plate; 600, plastic part; 501, pole hole; 502, step platform; 503, via. DETAILED DESCRIPTION

[0044] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] Please see Figure 1-2 The present application provides a pole, which includes: a pole body 200 and a shell 100 arranged around the pole body 200, wherein the shell 100 and the pole body 200 are insulated from each other.

[0047] The shell 100 includes a shell body 110 and an edge portion 120. The shell body 110 is arranged around the circumference of the pole body 200. The edge portion 120 extends from the shell body 110 to the end of the pole body 200. The shell body 110 and the edge portion 120 are covered outside the pole body 200 and limit at least part of the circumference and end of the pole body 200 within the shell 100.

[0048] The pole provided in the embodiment of the present application is provided with a shell 100 on the pole body 200, so as to facilitate the welding installation between the pole body 200 and the cover plate 500, improve the welding effect, avoid the displacement of the pole body 200 caused by the melting of the injection molding material when the existing injection molding top cover is welded to the pole, reduce the overlap risk, and reduce the safety hazard.

[0049] In the embodiment of the present application, the shell body 110 is bent to form two edge portions 120, and the shell body 110 and the edge portions 120 are covered on the outside of the pole body 200, so that the relative position of the pole body 200 can be guaranteed to be stable and the pole body 200 can be protected, thereby reducing the number of parts, reducing the positioning and assembly requirements, improving the assembly accuracy, and reducing the assembly cost of the pole.

[0050] In the embodiment of the present application, one of the edge portions 120 is a clamping portion 121, and the other edge portion 120 is a supporting portion 122. A portion of the pole body 200 is located between the clamping portion 121 and the supporting portion 122. The clamping portion 121 and the supporting portion 122 clamp a portion of the pole body 200, and one end of the pole body 200 protrudes from the clamping portion 121 in the extension direction of the pole body 200.

[0051] In the embodiment of the present application, the clamping portion 121 and the supporting portion 122 are arranged relative to each other in the axial direction of the pole body 200, and the pole body 200 is clamped between the clamping portion 121 and the supporting portion 122. The clamping portion 121 is arranged on one side of the pole protruding end, and the supporting portion 122 is arranged on the side away from the pole protruding end. The protruding end of the pole can be used as the positive or negative pole of the battery.

[0052] Alternatively, if Figure 3As shown, the pole body 200 includes a pole plate 210 and a pole body 220, the pole plate 210 includes a first surface 211 and a second surface 212 arranged opposite to each other, the pole body 220 is arranged on the second surface 212, the pole plate 210 is arranged in the shell 100 and the first surface 211 abuts the edge portion 120; the cross-sectional radius of the pole plate 210 is greater than the cross-sectional radius of the pole body 220.

[0053] When set, the axis of the pole plate 210 coincides with the axis of the pole body 220, the pole plate 210 and the pole body 200 can be cylinders, prisms, etc., and the cross-sectional shapes of the pole plate 210 and the pole body 200 can be polygons such as circles, triangles, quadrilaterals, etc. In the embodiment of the present application, the cross-sectional shape is circular for exemplary description. In the embodiment of the present application, the cross-sectional radius is defined as the maximum distance from the edge of the cross section to the center of the cross section in the cross section perpendicular to the axis direction. In the embodiment of the present application, the cross-sectional shape and the cross-sectional radius of the pole plate 210 and the pole body 220 are not limited. In this embodiment, the cross-sectional radius is preferably the radius of the circular cross section.

[0054] In addition, in the embodiment of the present application, the pole body 220 is provided with a middle hole 221 at the position corresponding to the axis, and the middle hole 221 is used for CCD positioning during subsequent module assembly and bus welding, which facilitates the welding positioning of the bus.

[0055] The pole plate 210 is provided with at least one opening 222 at the edge along the circumferential position, and the insulating member 300 is provided with a protruding portion (not shown in the figure) that cooperates with the opening 222. During installation, the protruding portion is inserted into the opening 222 to prevent the insulating member 300 and the pole body 200 from rotating, thereby improving the installation accuracy and preventing the insulating member 300 from being damaged.

[0056] like Figure 4 As shown, the shell body 110, the support portion 122, and the pressing portion 121 enclose a mounting cavity; in this embodiment, the shell body 110 is in a ring shape surrounding the pole body 200, the pole plate 210 is placed in the mounting cavity, the pressing portion 121 is pressed on the second surface 212, the support portion 122 is against the first surface 211, and one end of the pole body 220 protrudes from the mounting cavity.

[0057] The pressing portion 121 can be arranged at the upper end of the shell body 110, and the supporting portion 122 is arranged at the lower end of the shell body 110 to limit the position of the pole body 200. The pressing portion 121 is provided with a first through hole 1201, one end of the pole body 200 passes through the first through hole 1201 and protrudes from the mounting cavity, and the supporting portion 122 is provided with a second through hole 1202, and the second through hole 1202 is used to electrically connect the pole body 200 with the connecting piece on the battery cell.

[0058] The shapes of the shell body 110, the support portion 122, and the pressing portion 121 can be adapted to the shapes of the pole plate 210 and the pole body 220, and the axes of the shell body 110, the support portion 122, and the pressing portion 121 can coincide with the axis of the pole body 200, and the cross-sectional shapes of the pole plate 210 and the pole body 200 can be polygonal such as a circle, a triangle, and a quadrilateral. In the embodiment of the present application, the shell body 110, the support portion 122, and the pressing portion 121 enclose a mounting cavity, which can be covered on the surface of the pole body 200 to achieve sealing of the pole body 200.

[0059] In one embodiment of the present application, an insulating layer is disposed between the housing 100 and the pole body 200 , and the insulating layer is disposed on the surface of the housing 100 and / or the pole body 200 .

[0060] In the embodiments of the present application, the setting of the insulating layer is not limited. The insulating layer can be an insulating material coating, and can be an inorganic material or an organic material. For example, the inorganic material can be aluminum oxide, silicon nitride, etc.; the organic material can be polytetrafluoroethylene (FEP), polyimide (PI), polytetrafluoroethylene (PTFE), polyphenylene sulfide (PPS), polyvinylidene fluoride (PVDF), polyphenylene oxide (PPO), etc.

[0061] In another embodiment of the present application, Figure 5 and Figure 6 As shown, the pole further includes an insulating member 300 , which is disposed between the pole body 200 and the pressing portion 121 , and is pressed onto the pole plate 210 by the pressing portion 121 .

[0062] In the embodiment of the present application, the material of the insulating member 300 has high temperature resistance, no deformation and high insulation properties, for example, it can be aluminum oxide, silicon nitride, polytetrafluoroethylene (FEP), polyimide (PI), polytetrafluoroethylene (PTFE), polyphenylene sulfide (PPS), polyvinylidene fluoride (PVDF), polyphenylene oxide (PPO), etc.

[0063] Optionally, the insulating member 300 includes a first insulating portion 310 and a second insulating portion 320 , wherein two sides of the first insulating portion 310 respectively abut against the second surface 212 of the electrode plate 210 and the clamping portion 121 , and two sides of the second insulating portion 320 respectively abut against the clamping portion 121 and the electrode body 220 .

[0064] Among them, a third through hole 330 is provided on the insulating member 300, and the third through hole 330 is used for the pole body 220 to pass through. The third through hole 330 coincides with the axis of the pole body 200. The first insulating part 310 is sleeved on the pole body 220 and then embedded in the installation cavity. The two sides of the first insulating part 310 are respectively abutted against the second surface 212 and the clamping part 121; the outer diameter of the first insulating part 310 can be greater than the outer diameter of the pole plate 210, and the inner diameter of the shell body 110 can be greater than or equal to the outer diameter of the first insulating part 310. The first insulating part 310 can prevent the shell 100 from contacting the pole body 200, thereby achieving insulation between the shell 100 and the pole body 200.

[0065] The second insulating part 320 is installed on the second surface 212 of the pole body 220 and then embedded in the second through hole 1202. The diameter of the second through hole 1202 can be greater than or equal to the outer diameter of the second insulating part 320. The two sides of the second insulating part 320 are respectively abutted against the clamping part 121 and the pole body 220 to achieve insulation between the shell 100 and the pole body 200.

[0066] In the present application, the pole further includes a seal 400 , which is disposed between the pole body 200 and the support portion 122 , and is used to insulate and seal the pole body 200 and the support portion 122 .

[0067] like Figure 7 As shown, the sealing member 400 includes a first sealing portion 410 and a second sealing portion 420, the first sealing portion 410 includes a first sealing surface 401 and a second sealing surface 402 arranged opposite to each other, the first sealing surface 401 is in sealing contact with the first surface 211 of the electrode plate 210, the second sealing surface 402 is in sealing contact with the support portion 122, the second sealing portion 420 is arranged on the second sealing surface 402, the second sealing portion 420 is embedded in the second through hole 1202, the two sides of the first sealing portion 410 are respectively in contact with the support portion 122 and the first surface 211, the support portion 122 is provided with a support surface, and the first sealing portion 410 is in contact with the support surface.

[0068] The sealing member 400 is provided with a fourth through hole 450, the axis of which coincides with the axis of the second through hole 1202, and the fourth through hole 450 is used to electrically connect the pole body 200 with the connector of the battery cell. The outer diameter of the second sealing portion 420 is greater than or equal to the diameter of the second through hole 1202, and the second sealing portion 420 can be compressed and arranged in the second through hole 1202 to achieve sealing and insulation of the pole body 200 and the support portion 122 in the second through hole 1202, and insulation of the connector of the battery cell and the housing 100 can be achieved.

[0069] Optionally, the support portion 122 is provided with an annular groove 140 for fixing the seal 400, and the seal 400 is provided with a protrusion 430 engaged with the annular groove 140. The annular groove 140 is provided on the support surface, and the protrusion 430 is provided on the second sealing surface 402. The annular groove 140 and the protrusion 430 can realize the fixed connection of the seal 400, improve the sealing degree of the pole, and prevent the pole body 200 from shaking.

[0070] Optionally, the support portion 122 is provided with an annular protrusion 150 for fixing the seal 400; the seal 400 is provided with a clamping groove 440 clamped with the annular protrusion 150. The annular protrusion 150 is provided on the support surface, and the clamping groove 440 is provided on the second sealing surface 402. The annular protrusion 150 and the clamping groove 440 can realize the fixed connection of the seal 400, improve the sealing degree of the pole, and prevent the pole body 200 from shaking.

[0071] It should be noted that the annular groove 140 is recessed on the support surface toward the side away from the pole body 200, and the annular protrusion 150 is protruding on the support surface toward the side close to the pole body 200. By extending the sealing member 400 and the support surface in two directions, the sealing contact area between the second sealing surface 402 and the support surface can be increased, thereby improving the sealing degree.

[0072] In the embodiment of the present application, the cross-sectional shapes of the annular groove 140 , the protruding portion 430 , the annular protrusion 150 and the locking groove 440 are not limited, and their cross-sectional shapes may be square, trapezoidal, etc.

[0073] Optionally, the support portion 122 is provided with an annular groove 140 and an annular protrusion 150 for fixing the seal 400, and the annular groove 140 and the annular protrusion 150 are both arranged on the support surface, and the annular groove 140 and the annular protrusion 150 are both arranged to be closed circles. The number of the annular groove 140 and the annular protrusion 150 can be set to one or more, and can be set as needed in different embodiments. By setting one or more annular grooves 140 and annular protrusions 150, the sealing between the support surface and the second sealing surface 402 can be improved, playing a role of multiple sealing, extending the battery leakage path, and improving the sealing effect of the seal.

[0074] In this embodiment, the positions of the annular groove 140 and the annular protrusion 150 are not limited. When setting, the support portion 122 includes an annular protrusion 150 arranged between the annular protrusion 150 and the fourth through hole 450. The annular protrusion 150 can be formed by bending the end of the support portion 122 upward, which can facilitate the setting of the annular protrusion 150, that is, the second through hole 1202 is formed around the annular protrusion 150, and the sealing degree at the position of the second through hole 1202 can be improved by the annular protrusion 150.

[0075] In this embodiment, the sizes of the annular groove 140 and the annular protrusion 150 are not limited. For example, the outer diameter of the annular groove 140 can be larger than the outer diameter of the first sealing portion 410. After the pole is pressed in the accommodating cavity and the seal is squeezed, the outer diameter surface of the annular groove 140 can be in sealing contact with the outer diameter surface of the first sealing portion 410 to improve the sealing effect. Of course, in other embodiments, the inner diameter of the annular groove 140 can be smaller than the inner diameter of the first sealing portion 410 to further improve the sealing effect.

[0076] The annular groove 140 includes a first bottom surface 141 , the annular protrusion 150 includes a first top surface 151 , the protrusion 430 includes a second top surface 431 , the slot 440 includes a second bottom surface 441 , the second top surface 431 is in sealing contact with the first bottom surface 141 , and the second bottom surface 441 is in sealing contact with the first top surface 151 .

[0077] In the present application, in the initial state or when the seal 400 is in an uncompressed state, the distance between the first bottom surface 141 and the first top surface 151 is less than or equal to the distance between the second bottom surface 441 and the second top surface 431, and the compression degree of the seal 400 can be limited by limiting the distance between the second bottom surface 441 and the second top surface 431. For example, the compression amount of the seal 400 is 10%-50%, and the sealing degree between the seal 400 and the pole body 200 and the support portion 122 can be controlled by controlling the compression amount of the seal 400.

[0078] The second sealing portion 420 includes a third top surface 421, and the distance from the third top surface 421 to the second bottom surface 441 is greater than the distance from the second top surface 431 to the second bottom surface 441, and the distance from the third top surface 421 to the second bottom surface 441 is greater than the distance from the first top surface 151 to the side surface of the support portion 122 away from the installation cavity. By extending the length of the second sealing portion 420 to the outside of the support portion 122, the sealing degree and insulation performance of the second through hole 1202 are improved, effectively preventing internal leakage of the battery and improving the battery life.

[0079] In a possible embodiment of the present application, the pressing portion 121 is a bendable structure, and an end of the pressing portion 121 is bent to form at least one laminated layer 160 , and the laminated layer 160 presses the pole body 200 against the support portion 122 .

[0080] In the embodiment of the present application, the number of bending layers of the clamping portion 121 is not limited, and can be set as needed in different embodiments. The number of the laminated layers 160 can be one layer, two layers, three layers or more layers. Optionally, the laminated layer 160 includes at least two layers, and the bending directions of two adjacent laminated layers 160 are opposite. By setting at least two layers of laminated layers 160, the degree of compression of the clamping portion 121 can be improved, the connection strength of the pole can be improved, and the pole body 200 can be prevented from shaking.

[0081] When provided, the pressing portion 121 is used to be formed by bending the protruding portion 430 toward the center direction of the pole body 200 after the pole body 200 is placed in the installation cavity. When the number of layers of the laminated layer 160 is one, the protruding portion 430 is bent once toward the center direction of the pole body 200, and when the number of layers of the laminated layer 160 is two, the protruding portion 430 is bent once toward the center direction of the pole body 200 and then continues to bend away from the center direction of the pole body 200.

[0082] In the embodiment of the present application, when the pressing part 121 is formed by bending the housing body 110, the pressing part 121 can also compress the sealing member 400 through the insulating member 300 and the pole body 200 when bending, so as to control the compression amount of the sealing member 400 to be 10%-50%. In the present application, the friction between the sealing member 400 and the pole body 200 is increased by compressing the sealing member 400, so as to prevent the pole body 200 from rotating relative to the housing 100.

[0083] In addition, the support portion 122 can be arranged in a similar manner to the clamping portion 121 , and the support portion 122 can be formed by bending one end of the shell body 110 , and the support portion 122 is formed by bending the other end of the shell body 110 toward the center direction of the pole body 200 .

[0084] In an embodiment of the present application, a method for forming a pole is provided, the method comprising:

[0085] S100, sleeve the housing body 110 onto the pole body 200;

[0086] S200, respectively extend one end of the shell body 110 toward the end of the pole body 200 to form edge portions 120 at both ends of the body, the shell body 110 and the edge portions 120 are wrapped around the pole body 200 to form the pole, and the two edge portions 120 can confine a portion of the pole body 200 within the shell 100.

[0087] In the embodiment of the present application, the edge portion 120 forms a supporting portion 122 at one end of the shell body 110 and forms a clamping portion 121 at the other end. It can be understood that the formation order of the supporting portion 122 and the clamping portion 121 is not limited in the embodiment of the present application.

[0088] In one embodiment of the present application, during the specific operation:

[0089] S201 , bend one end of the shell body 110 toward the center direction of the pole body 200 to form the support portion 122 , and fix the sealing member 400 on the support portion 122 .

[0090] S202 , placing the pole body 200 in the housing body 110 and making contact with the sealing member 400 .

[0091] S203 , sleeve the insulating member 300 on the pole body 200 .

[0092] S204 , bend the other end of the shell body 110 toward the center direction of the pole body 200 to form a pressing portion 121 .

[0093] In the embodiment of the present application, the pressing portion 121 and the supporting portion 122 are realized by bending, which can simplify the structure of the pole body 200 assembly, reduce the number of parts, reduce positioning and assembly requirements, improve assembly accuracy, and reduce the assembly cost of the pole.

[0094] Based on the same concept, Figure 8-10 As shown, the present application provides a cover plate assembly, including a cover plate sheet 500 and a pole as described above, wherein at least one pole hole 501 is provided on the cover plate sheet 500 , and the support portion 122 of the pole is welded in the pole hole 501 .

[0095] When setting, the pole hole 501 is a stepped hole, the pole hole 501 includes a stepped platform 502, and the support portion 122 is welded on the stepped platform 502. The large hole diameter of the stepped hole matches the outer diameter of the shell body 110, and the inner diameter of the stepped hole matches the diameter of the first through hole 1201 to achieve the fixation and installation of the pole body 200. The second sealing portion 420 of the seal 400 can extend to the inner diameter of the pole hole 501 to improve the sealing effect. The support portion 122 can be fixedly arranged on the stepped platform 502 by ultrasonic welding or the like to achieve the installation of the pole.

[0096] The cover plate assembly further comprises a plastic part 600 disposed on the side of the cover plate 500 away from the pole, and the plastic part 600 is provided with a through hole 503 matching the pole hole 501. The through hole 503 can realize the electrical connection between the connecting piece of the battery and the pole body 200.

[0097] The present application also provides a method for forming a cover plate assembly, the method comprising:

[0098] The pole is placed in the pole hole 501 of the cover plate 500 , and the housing 100 and the cover plate 500 are welded.

[0099] In the embodiment of the present application, the welding position of the shell 100 and the cover plate 500 is not limited. The surface of the shell body 110 can be welded to the surface of the cover plate 500, and the support part 122 can also be welded to the surface of the step platform 502 to improve the connection strength and sealing performance of the cover plate assembly.

[0100] Based on the same concept, the present application provides a battery, comprising a housing and a cover assembly as described above and sealed to the housing.

[0101] 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 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.

[0102] 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0103] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0104] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A pole, characterized in that: The pole comprises: a pole body and a shell arranged around the pole body, wherein the shell and the pole body are insulated from each other; The shell includes a shell body and an edge portion, the shell body is arranged around the circumference of the pole body, the edge portion extends from the shell body to the end of the pole body, the shell body and the edge portion are covered outside the pole body and at least part of the circumference and end of the pole body is restricted within the shell.

2. The pole according to claim 1, characterized in that: The pole body includes a pole plate and a pole body, the pole plate includes a first surface and a second surface that are oppositely arranged, the pole body is arranged on the second surface, the pole plate is arranged in the shell and the first surface abuts against the edge portion.

3. The pole according to claim 2, characterized in that: One of the edge portions is a clamping portion, and the other edge portion is a supporting portion. A portion of the pole body is located between the clamping portion and the supporting portion. The clamping portion and the supporting portion clamp a portion of the pole body, and one end of the pole body protrudes from the clamping portion in the extension direction of the pole body.

4. The pole according to claim 3, characterized in that: The shell body, the supporting portion, and the pressing portion enclose a mounting cavity, the pole plate is placed in the mounting cavity, the pressing portion is pressed on the second surface, the supporting portion abuts against the first surface, and one end of the pole body protrudes from the mounting cavity.

5. The pole according to any one of claims 1 to 4, characterized in that: An insulating layer is arranged between the shell and the pole body, and the insulating layer is arranged on the surface of the shell and / or the pole body.

6. The pole according to claim 4, characterized in that: It also includes an insulating member, which is arranged between the pole body and the pressing portion and is pressed onto the pole plate by the pressing portion.

7. The pole according to claim 6, characterized in that: The insulating member includes a first insulating portion and a second insulating portion, wherein two sides of the first insulating portion are respectively in contact with the second surface of the electrode plate and the pressing portion, and two sides of the second insulating portion are respectively in contact with the pressing portion and the electrode body.

8. The pole according to claim 3, characterized in that: It also includes a seal, which is arranged between the pole body and the support portion, and is used to insulate and seal the pole body and the support portion.

9. The pole according to claim 8, characterized in that: The support portion is provided with an annular groove for fixing the sealing member, and the sealing member is provided with a protrusion engaged with the annular groove.

10. The pole according to claim 8, characterized in that: The support portion is provided with an annular protrusion for fixing the sealing member; the sealing member is provided with a clamping groove clamped with the annular protrusion.

11. The pole according to claim 3, characterized in that: The pressing portion is a bendable structure, and the end of the pressing portion is bent to form at least one stacking layer, and the stacking layer presses the pole body to the support portion.

12. The pole according to claim 11, characterized in that: The stacked layers include at least two layers, and the bending directions of two adjacent stacked layers are opposite.

13. A cover plate assembly, characterized in that: It comprises a cover plate and a pole as claimed in any one of claims 1 to 12, wherein the cover plate is provided with at least one pole hole, and a shell of the pole is welded in the pole hole.

14. The cover plate assembly according to claim 13, characterized in that: The pole hole is a stepped hole, the pole hole includes a stepped platform, and the edge portion is welded to the stepped platform.

15. The cover plate assembly according to claim 13, characterized in that: It also includes a plastic part arranged on a side of the cover plate away from the pole, and the plastic part is provided with a through hole matched with the pole hole.

16. A battery, characterized in that: It comprises a shell and a cover plate assembly as described in any one of claims 13-15 which is sealed and connected to the shell.

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