CN116845500A - Battery - Google Patents

Abstract

The invention relates to the technical field of energy batteries and discloses a battery, which includes a casing, a positive pole, an insulating sealing component and a riveting block. The positive pole is installed in the installation hole of the casing. One end of the positive pole is provided with a limiting protrusion, and the other end of the positive pole is provided with a limiting protrusion. Riveting ribs are provided, the upper insulating piece is arranged between the limiting protrusion and the outer surface of the housing, the sealing member is arranged between the outer wall of the positive pole and the inner wall of the mounting hole, the lower insulating piece is arranged on the inner surface of the housing, and the riveting block is arranged on the riveting ribs On the outer periphery, the riveting block includes a first riveting part and a second riveting part arranged in an up and down steps. The first riveting part passes through the lower insulating member and is in contact with the sealing member, and the second riveting part is in contact with the lower insulating member. The riveting block can enhance the structural strength of the positive side of the battery core and reduce the risk of fracturing of the lower insulating part caused by the riveting ribs. The first riveting part penetrates the lower insulating part and contacts the sealing part, avoiding the lower insulating part. In the height direction The space utilization of the battery is improved, and the cooperation between the second riveted part and the lower insulator ensures the insulation performance.

Description

Battery

Technical field

The invention relates to the technical field of energy batteries, and in particular to a battery.

Background technique

Energy batteries such as lithium and lithium iron phosphate have become one of the important research directions for power batteries for new energy vehicles due to their high energy density, high safety and low cost advantages. The battery mainly includes a casing, a roll core, positive and negative covers, positive poles and positive and negative current collecting plates. The first end of the casing is open, and the second end is provided with a mounting hole on the end face. The roll core is set inside the casing. , the negative cover sealing cover is located at the first end of the casing, the positive pole is installed in the mounting hole, and the positive current collecting plate is used to connect the positive ear and the positive pole of the winding core.

In the prior art, in order to ensure the insulation sealing between the positive pole and the casing and the reliable connection between the two, insulation layers are respectively provided on the outer surface and the inner surface of the casing to insulate the outer and inner ends of the positive pole. , and at the same time, a sealing ring is set in the mounting hole to seal the gap between the positive pole and the casing. The inner end of the positive pole is provided with a riveting rib that matches the insulation layer on the inner surface of the casing to provide support when the positive pole is riveted. The stress point, and because there are internal and external insulation layers, sealing rings, riveting ribs and other structures between the positive pole and the casing, the space in the height direction of the battery is occupied, affecting the use of effective space in the battery; at the same time Because the stress on the riveted ribs will squeeze the insulation layer on the inner surface of the casing, it can easily lead to extrusion rupture.

Contents of the invention

In view of this, the present invention provides a battery to solve the problem that the installation between the positive pole and the casing of the existing battery occupies the space in the height direction of the battery, which affects the utilization of the effective space in the battery. At the same time, the riveting ribs will cause damage to the casing. The insulation layer on the surface of the body is extruded, which can easily lead to extrusion rupture.

The invention provides a battery, which includes a casing, a positive pole, an insulating sealing component and a riveting block. The casing is provided with a mounting hole, the positive pole is installed in the mounting hole, and the positive pole is located on the A limiting protrusion is provided at one end outside the housing, and a riveting rib is provided at one end of the positive pole inside the housing. The limiting protrusion and the riveting rib respectively limit the two ends of the positive pole. , the insulating sealing assembly includes an upper insulating member, a sealing member and a lower insulating member, the upper insulating member is provided between the limiting protrusion and the outer surface of the housing, the sealing member is provided in contact with Between the outer wall of the positive pole and the inner wall of the mounting hole, the lower insulating member is disposed on the inner surface of the housing, the riveting block is disposed on the outer periphery of the riveting rib, the riveting block includes The first riveting part and the second riveting part are arranged in an up and down steps. The first riveting part passes through the lower insulating member and is in contact with the sealing member. The second riveting part is in contact with the lower insulating member. .

Beneficial effects: The two ends of the positive pole are limited by the limiting protrusions and riveting ribs to prevent the positive pole from protruding from the installation holes at both ends, and the upper insulator is arranged between the limiting protrusions and the outer surface of the casing. , the sealing member is disposed in contact between the outer wall of the positive electrode column and the inner wall of the mounting hole, and the lower insulating member is disposed on the inner surface of the casing, thereby achieving a mutually insulated and sealed fixed connection between the positive electrode column and the casing, and the riveting block is provided The outer periphery of the riveting rib can enhance the structural strength of the positive side of the battery core, and at the same time reduce the risk of fracturing of the lower insulating part caused by the riveting rib during riveting. The first riveting part of the riveting block is set through the lower insulating part to abut against the sealing part to avoid With the lower insulating piece opened, the structure is more compact and the space utilization of the battery is improved in the height direction. The cooperation between the second riveting part of the riveting block and the lower insulating piece ensures the insulation performance.

In an optional embodiment, a first deformation relief groove is provided on a side of the lower insulating member facing the housing, and the first deformation relief groove is at least partially located below the sealing member.

Beneficial effects: By arranging the first deformation release groove on the lower insulating member, when the sealing member is subjected to the contact force of the riveting block, the sealing member itself will be squeezed and deformed toward the first deformation release groove, thereby releasing the deformation amount of the sealing member. On the one hand, the pressure cracking failure of the seal is avoided; on the other hand, the extension deformation of the seal also increases the sealing area of the seal, thereby improving the sealing performance.

In an optional embodiment, a second deformation release groove is further provided on a side of the lower insulating member facing the housing, and the second deformation release groove is provided corresponding to the second riveting portion.

Beneficial effect: the second deformation release groove can cause the lower insulating part to deform along the second deformation releasing groove when the second riveting part is forced to squeeze the lower insulating part, thereby releasing the extrusion deformation of the lower insulating part. The amount can prevent the lower insulating part from cracking and failure due to excessive pressure, and protect the lower insulating part.

In an optional embodiment, the first deformation release groove is set as an annular groove along the circumferential direction of the seal; and/or the second deformation release groove is opened along the length direction of the lower insulating member. , and the second deformation release groove is connected with the first deformation release groove.

Beneficial effects: The annular groove allows the seal to deform circumferentially toward the annular groove when it is squeezed, increasing the amount of deformation release space and minimizing the risk of seal fracturing. The second deformation release groove is along the length direction of the lower insulator. It is opened so that the extrusion deformation of the lower insulating part in the length direction of the second riveting part can be effectively released, and the risk of fracturing of the lower insulating part can be reduced as much as possible.

In an optional embodiment, the sealing member includes a first sealing portion and a second sealing portion, and the first sealing portion abuts against the outer surface of the housing and the limiting protrusion. between the bottom surfaces, and the end of the first sealing part is in contact with the upper insulator, the second sealing part is in contact between the outer wall of the positive pole and the inner wall of the mounting hole, and The bottom of the second sealing part is in contact with the first riveting part, and the first deformation relief groove is at least partially located below the second sealing part.

Beneficial effect: the first sealing part is provided in contact between the outer surface of the housing and the bottom surface of the limiting protrusion, thereby sealing the outer surface of the housing and the bottom surface of the limiting protrusion, and the second sealing part is in contact with It is disposed between the outer wall of the positive pole and the inner wall of the mounting hole, thereby sealing the outer wall of the positive pole and the inner wall of the mounting hole. At the same time, the end of the first sealing part is in contact with the upper insulator, and the bottom of the second sealing part is Being in contact with the first riveting part can enhance the sealing performance.

In an optional embodiment, a side of the limiting protrusion facing the housing is provided with a first sealing surface and a second sealing surface arranged in an up and down steps, and the first sealing portion sealingly fits the On the first sealing surface, the second sealing part is sealingly attached to the second sealing surface; and/or, the upper insulating member includes a first insulating part and a second insulating part, and the first The insulating part covers the outer periphery of the limiting protrusion, the second insulating part is disposed between the bottom surface of the limiting protrusion and the outer surface of the housing, and the inner surface of the second insulating part The end is in contact with the first sealing part.

Beneficial effect: By arranging upper and lower double mesa surfaces (first sealing surface and second sealing surface) on the side of the limiting protrusion facing the housing, and the double mesa surfaces cooperate with the first sealing part and the second sealing part respectively, thereby achieving the sealing effect. The stepped seal between the positive pole and the casing has excellent sealing performance; the first insulating part covers the outer periphery of the limit protrusion, which can protect the limit protrusion and avoid collision damage to the limit protrusion. The two insulating parts are arranged between the bottom surface of the limiting protrusion and the outer surface of the housing, thereby achieving insulation between the limiting protrusion and the housing.

In an optional embodiment, a limiting groove is provided on the outer surface of the housing along the circumference of the mounting hole, and both the second insulating part and the first sealing part are provided in the limiting groove. Inside.

Beneficial effects: The second insulating part and the first sealing part can be positioned and installed through the limiting groove, thereby improving the accuracy of their installation on the housing.

In an optional embodiment, one end of the positive pole located in the housing is provided with a groove, and the riveting rib is formed in the circumferential direction of the groove. The battery further includes a groove provided on the housing. The positive electrode current collecting plate in the body is provided with a boss on one side of the positive electrode current collecting plate facing the positive pole. The boss is engaged in the groove, and the top surface of the boss is suitable for connecting with the positive pole. The groove bottom surface of the groove is fit and welded.

Beneficial effects: By clamping the boss of the positive electrode current collecting plate into the groove of the positive pole, and welding the matching parts of the top surface of the boss and the bottom surface of the groove, the two are welded and fixed, and the boss is The cooperation between the top surface of the table and the bottom surface of the groove increases the welding area, and the groove reduces the welding thickness of the positive pole, thereby reducing the difficulty of welding, improving assembly efficiency, and also reducing internal contact resistance and increasing This improves the overcurrent capability of the battery and improves product yield.

In an optional embodiment, a supporting rib is provided on a side of the lower insulating member away from the housing, and the supporting rib abuts the positive electrode current collecting plate to support the positive electrode current collecting plate. The installation plays a supporting and positioning role.

In an optional embodiment, the opening of the groove is provided with rounded corners, and the boss is clamped in the groove through the rounded corners; and/or the battery further includes An electrode group and a negative electrode current collecting plate, the electrode group is arranged in the housing, the positive electrode lug of the electrode group is connected to the positive electrode current collecting plate, the negative electrode current collecting plate is connected to the negative electrode lug of the electrode group and The housings are all connected.

Beneficial effects: By rounding the opening of the groove, the boss can be easily clamped in the groove through the rounding, which reduces the assembly difficulty of the two and improves the assembly efficiency; the pole assembly is used to accommodate and release electricity. The positive current collecting plate is connected to the positive ear of the electrode group to realize the collection and extraction of the positive current of the electrode group through the positive current collecting plate, and the negative electrode current collecting plate can collect and introduce the negative current of the electrode group to the casing.

Description of the drawings

In order to more clearly explain the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description The drawings illustrate some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 is a schematic three-dimensional structural diagram of a battery according to an embodiment of the present invention;

Figure 2 is a top view of a battery according to an embodiment of the present invention;

Figure 3 is a cross-sectional view along the A-A direction in Figure 2;

Figure 4 is a partial cross-sectional enlarged schematic diagram of a battery according to an embodiment of the present invention;

Figure 5 is a cross-sectional view of the positive pole according to the embodiment of the present invention;

Figure 6 is a schematic three-dimensional structural diagram of the positive pole according to the embodiment of the present invention;

Figure 7 is a schematic three-dimensional structural diagram of a seal according to an embodiment of the present invention;

Figure 8 is a cross-sectional view of the seal according to the embodiment of the present invention;

Figure 9 is a cross-sectional view of the positive electrode current collecting plate according to the embodiment of the present invention;

Figure 10 is a schematic three-dimensional structural diagram of the positive electrode current collecting plate according to the embodiment of the present invention;

Figure 11 is a schematic three-dimensional structural diagram of the riveting block according to the embodiment of the present invention;

Figure 12 is a cross-sectional view of the riveting block according to the embodiment of the present invention.

Explanation of reference symbols:

1. Housing; 2. Positive pole; 21. Groove; 211. Round corner; 22. Riveting rib; 23. Limiting protrusion; 231. First sealing surface; 232. Second sealing surface; 3. Upper Insulating piece; 31. First insulating part; 32. Second insulating part; 4. Seal; 41. First sealing part; 42. Second sealing part; 5. Lower insulating part; 51. First deformation release groove; 52. Second deformation release groove; 53. Support rib; 6. Riveting block; 61. First riveting part; 62. Second riveting part; 63. Riveting hole; 631. Installation step; 7. Positive electrode collecting plate; 71. Boss; 8. Electrode group; 9. Negative electrode current collecting plate; 10. Negative electrode cover.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

As shown in Figures 1 to 12, according to an embodiment of the present invention, on the one hand, a battery is provided, including a case 1, a positive pole 2, an insulating seal 4 and a riveting block 6, wherein the case 1 is provided with The positive pole 2 is installed in the mounting hole. One end of the positive pole 2 located outside the housing 1 is provided with a limiting protrusion 23. One end of the positive pole 2 located inside the housing 1 is provided with a riveting rib 22 and a limiting protrusion 23. and riveting ribs 22 respectively limit the two ends of the positive pole 2. The insulating sealing assembly includes an upper insulating member 3, a sealing member 4 and a lower insulating member 5. The upper insulating member 3 is disposed between the limiting protrusion 23 and the housing 1. Between the outer surfaces, the sealing member 4 is disposed in contact between the outer wall of the positive pole 2 and the inner wall of the mounting hole, the lower insulating member 5 is disposed on the inner surface of the housing 1, and the riveting block 6 is disposed on the outer periphery of the riveting rib 22. The riveting block 6 includes a first riveting part 61 and a second riveting part 62 arranged in an up and down steps. The first riveting part 61 passes through the lower insulating member 5 and abuts against the sealing member 4 . The second riveting part 62 abuts against the lower insulating member 5 . catch.

In the battery of this embodiment, the two ends of the positive pole 2 are respectively limited by the limiting protrusions 23 and the riveting ribs 22 to prevent the positive pole 2 from coming out of the mounting holes at both ends. The upper insulating member 3 is arranged on the limiting protrusion. 23 and the outer surface of the housing 1, the sealing member 4 is provided in contact between the outer wall of the positive pole 2 and the inner wall of the mounting hole, and the lower insulating member 5 is provided on the inner surface of the housing 1, thereby realizing the positive pole 2 The fixed connection with the casing 1 is insulated and sealed, and the riveting block 6 is arranged on the outer periphery of the riveting rib 22, which can enhance the structural strength of the positive side of the battery core and at the same time reduce the risk of fracturing of the lower insulating member 5 by the riveting rib 22 during riveting. , the first riveting part 61 of the riveting block 6 passes through the lower insulating member 5 and contacts the sealing member 4, avoiding the lower insulating member 5. The structure is more compact and the space utilization of the battery is improved in the height direction. The riveting block The cooperation between the second riveted part 62 of 6 and the lower insulating member 5 ensures the insulation performance.

In this embodiment, the casing 1 is a hollow cylindrical casing with one end closed and the other end open. The mounting hole is set on the closed end face. The positive pole 2 is insulated and sealed in the mounting hole. The open part is suitable for setting the negative electrode cover. plate 10, thereby achieving a sealed assembly of the housing 1.

The positive pole 2 is used to draw out the positive current. As far as the shape is concerned, specifically, the installation hole is a circular hole, and the positive pole 2 is also a circular cylinder. The limiting protrusion 23 and the riveting rib 22 can be placed on the positive pole. 2. After being plugged into the installation hole, stamping or extrusion is used. There is no specific limitation in this embodiment.

In this embodiment, a groove 21 is provided at one end of the positive pole 2 located in the housing 1. A riveting rib 22 is formed in the circumferential direction of the groove 21. The riveting rib 22 not only limits the position but also plays a role in the welding of the positive pole 2. The role of force support.

The riveting block 6 is arranged on the outer periphery of the riveting rib 22, so that the circumferential area of the riveting rib 22 is extended, increasing the stress-bearing area between the riveting rib 22 and the upper insulator 3, thereby reducing the instantaneous impact of riveting on the upper insulator. 3 to reduce the risk of fracturing. At the same time, the riveting block 6 also enhances the structural strength of the riveting rib 22, thereby enhancing the structural strength of the positive side of the battery core.

Specifically, the riveting ribs 22 are annular ribs arranged along the circumferential direction of the groove 21, and the riveting block 6 is also an annular block with a riveting hole 63 in the middle. The riveting block 6 is sleeved on the outer periphery of the positive pole 2 through the riveting hole 63, and The inner wall of the riveting hole 63 is provided with a mounting step 631, and the riveting rib 22 is clamped on the mounting step 631, thereby ensuring reliable cooperation between the riveting block 6 and the riveting rib 22.

In this embodiment, the diameter of the first riveting part 61 is smaller than the diameter of the second riveting part 62, and the outer end of the first riveting part 61 is connected to the inner end of the second riveting part 62, and the installation step 631 is formed on the first riveting part. 61 and the second riveting part 62. During installation, firstly, the riveting block 6 is sleeved on the outer periphery of the groove 21 of the positive pole 2 through the riveting hole 63, and the riveting ribs 22 in the circumferential direction of the groove 21 are directed toward the groove. 21 can be bent externally to form an annular rib, and the annular rib is stuck in the installation step 631, so that the first riveting part 61 and the sealing member 4 are tightly pressed.

The battery of this embodiment also includes a positive current collecting plate 7 disposed in the casing 1. The positive current collecting plate 7 is provided with a boss 71 on a side facing the positive pole 2. The boss 71 is engaged in the groove 21 and is convex. The top surface of the platform 71 is suitable for welding with the bottom surface of the groove 21 . By clamping the boss 71 of the positive electrode current collecting plate 7 into the groove 21 of the positive electrode column 2, and welding the matching parts of the top surface of the boss 71 and the bottom surface of the groove 21, the welding of the two is achieved. Fixed, the cooperation between the top surface of the boss 71 and the bottom surface of the groove 21 increases the welding area, and the groove 21 reduces the welding thickness of the positive pole 2, thereby reducing the welding difficulty, improving the assembly efficiency, and also reducing the The internal contact resistance is reduced, the overcurrent capacity of the battery is increased, and the product yield is improved.

The positive current collecting plate 7 is used for converging the positive current of the battery. The positive current collecting plate 7 can be set as a circular disk. The middle of the circular disk is provided with a boss 71. The boss 71 can cooperate with the groove 21 on the positive pole 2. . In this embodiment, the groove 21 is a cylindrical groove 21, and the boss 71 is a hollow circular platform, which can be formed by stamping or extruding the middle part of the positive electrode current collecting plate 7. The size of the circular platform is smaller than that of the groove 21. The inner diameter is so that the boss 71 can be clamped in the groove 21 .

Furthermore, the opening of the groove 21 is provided with a rounded corner 211 , and the boss 71 is engaged in the groove 21 through the rounded corner 211 . By performing rounding 211 on the opening of the groove 21 , the boss 71 can be easily engaged in the groove 21 through the rounding 211 , thereby reducing the assembly difficulty of the two and improving the assembly efficiency.

It can be understood that after the riveting rib 22 is installed on the installation step 631 in the riveting block 6, the side of the riveting rib 22 away from the limiting protrusion 23 and the side of the second riveting portion 62 away from the limiting protrusion 23 are flush, and They are all in contact with the side of the positive electrode current collecting plate 7 facing the positive electrode column 2, so that when the positive electrode column 2 and the positive electrode current collecting plate 7 are welded together through the boss 71 and the groove 21, the riveting ribs 22 and the riveting block 6 are both riveted. The instantaneous impulse force will squeeze the lower insulating member 5.

In terms of specific materials, both the upper insulating member 3 and the lower insulating member 5 can be made of insulating and elastic materials such as rubber, sponge or foam.

In this embodiment, a first deformation relief groove 51 is provided on a side of the lower insulating member 5 facing the housing 1 , and the first deformation relief groove 51 is at least partially located below the sealing member 4 . By providing the first deformation release groove 51 on the lower insulating member 5 , when the seal 4 is subjected to the contact force of the riveting block 6 , the seal 4 itself will be squeezed and deformed toward the first deformation release groove 51 , thereby releasing the seal 4 The amount of deformation not only prevents the seal 4 from cracking and failing under pressure, but also increases the sealing area of the seal 4, thereby improving the sealing performance.

In terms of the configuration shape, the lower insulating member 5 is a circular gasket. The middle part of the circular gasket is provided with a circular hole for the positive pole 2 to pass through. The first deformation relief groove 51 can be along the sealing member 4 or the circular hole. The annular groove 21 is provided in the circumferential direction, so that when the seal 4 is squeezed, it can deform in the circumferential direction toward the annular groove 21, thereby increasing the amount of deformation release space and minimizing the risk of fracturing of the seal 4.

In this embodiment, a second deformation release groove 52 is also provided on the side of the lower insulating member 5 facing the housing 1 . The second deformation release groove 52 is provided correspondingly to the second riveting portion 62 . The second deformation release groove 52 can cause the lower insulator 5 to deform along the second deformation release groove 52 when the second riveting portion 62 is forced to squeeze the lower insulator 5 , thereby releasing the lower insulator 5 . The extrusion deformation amount prevents the lower insulating member 5 from being cracked and failed due to excessive pressure, and plays a protective role in the lower insulating member 5 .

In this embodiment, the second deformation release groove 52 is connected with the first deformation release groove 51 , and the second deformation release groove 52 is opened along the length direction of the lower insulating member 5 so that the second riveting portion 62 is aligned with the lower insulating member 5 . The extrusion deformation in the length direction can be effectively released, thereby reducing the risk of fracturing of the lower insulating member 5 as much as possible.

The second deformation release groove 52 is specifically a rectangular groove 21. The length of the rectangular groove 21 extends to the outer end of the second riveting part 62, so that the second riveting part 62 can effectively squeeze and deform the lower insulating member 5. freed.

It should be noted here that the inner end of the first riveting part 61 is the end that is in contact with the outer wall surface of the positive electrode post 2 , the outer end of the first rivet part 61 is the end away from the positive electrode post 2 , and the second rivet part 62 is The inner end is the end close to the positive pole 2 and is in contact with the end of the riveting rib 22 . The outer end of the second riveting portion 62 is the end away from the positive pole 2 .

Furthermore, a supporting rib 53 is provided on the side of the lower insulating member 5 away from the housing 1 . The supporting rib 53 abuts the positive electrode current collecting plate 7 to support and position the installation of the positive electrode current collecting plate 7 .

In this embodiment, the supporting ribs 53 are annular ribs arranged around the lower insulating member 5 , which can support and position the positive electrode current collecting plate 7 in the circumferential direction. The specific annular ribs can be stamped, extruded or Shaped by machining.

In this embodiment, the seal 4 includes a first sealing part 41 and a second sealing part 42, wherein the first sealing part 41 is disposed in contact between the outer surface of the housing 1 and the bottom surface of the limiting protrusion 23, and The end of the first sealing part 41 is in contact with the upper insulator 3 , the second sealing part 42 is in contact between the outer wall of the positive pole 2 and the inner wall of the mounting hole, and the bottom of the second sealing part 42 is riveted with the first Part 61 is in contact. In this arrangement, the first sealing portion 41 is disposed between the outer surface of the housing 1 and the bottom surface of the limiting protrusion 23, thereby sealing the outer surface of the housing 1 and the bottom surface of the limiting protrusion 23. The two sealing parts 42 are in contact with each other between the outer wall of the positive pole 2 and the inner wall of the mounting hole, thereby sealing the outer wall of the positive pole 2 and the inner wall of the mounting hole. At the same time, the end of the first sealing part 41 is in contact with the upper insulator. 3, the bottom of the second sealing part 42 is in contact with the first riveting part 61, so that the sealing performance can be enhanced.

Specifically, the sealing member 4 is a Z-shaped sealing ring, the top of the Z-shaped sealing ring is the first sealing part 41 , and the bottom of the Z-shaped sealing ring is the second sealing part 42 .

In terms of specific installation and cooperation, in this embodiment, the side of the limiting protrusion 23 facing the housing 1 is provided with a first sealing surface 231 and a second sealing surface 232 arranged in an up and down steps, and the first sealing portion 41 seals and fits On the first sealing surface 231, the second sealing portion 42 is sealingly attached to the second sealing surface 232. By providing upper and lower double mesa surfaces (first sealing surface 231 and second sealing surface 232) on the side of the limiting protrusion 23 facing the housing 1, and the double mesa surfaces cooperate with the first sealing part 41 and the second sealing part 42 respectively, Thereby, the stepped sealing between the positive pole 2 and the housing 1 is achieved, and the sealing performance is excellent.

In this embodiment, the upper insulating member 3 includes a first insulating part 31 and a second insulating part 32. The first insulating part 31 covers the outer periphery of the limiting protrusion 23, and the second insulating part 32 is disposed on the limiting protrusion 23. between the bottom surface of the first insulating part 23 and the outer surface of the housing 1 , and the inner end of the second insulating part 32 is in contact with the first sealing part 41 . In this arrangement, the first insulating part 31 covers the outer periphery of the limiting protrusion 23, which can protect the limiting protrusion 23 and prevent the limiting protrusion 23 from being damaged by collision. The second insulating part 32 is disposed on the limiting protrusion 23. between the bottom surface of the protrusion 23 and the outer surface of the housing 1, thereby achieving insulation between the limiting protrusion 23 and the housing 1.

Specifically, the upper insulating member 3 is a U-shaped member with an escape hole in the middle to facilitate the passage of the positive pole 2. The vertical part of the U-shaped member is the first insulating portion 31, which is wrapped around the outer periphery of the limiting protrusion 23. The horizontal part of the profile is the second insulating part 32 , which is disposed between the bottom surface of the limiting protrusion 23 and the outer surface of the housing 1 .

In addition, in this embodiment, a limiting groove is provided on the outer surface of the housing 1 along the circumferential direction of the mounting hole. The second insulating part 32 and the first sealing part 41 are both disposed in the limiting groove, so as to protect the second insulation through the limiting groove. The part 32 and the first sealing part 41 are positioned and installed to improve the accuracy of their installation on the housing 1.

The battery of this embodiment also includes an electrode group 8 , which is arranged in the housing 1 . The positive electrode lug of the electrode group 8 is connected to the positive electrode current collecting plate 7 . The electrode group 8 is used to accommodate and release electricity, and the positive electrode current collector plate 7 is connected to the positive electrode lug of the electrode group 8 to realize the positive electrode current of the electrode group 8 being drawn out through the positive electrode current collector plate 7 .

Specifically, the pole group 8 is a wound cylindrical battery core, and its size is smaller than the inner cavity size of the casing 1 so that it can be placed in the casing 1. The pole group 8 is provided with positive and negative electrode lugs to facilitate the placement. Positive current and negative current are drawn out.

At the same time, it also includes a negative electrode current collecting plate 9, which is connected to both the negative electrode lug of the electrode group 8 and the casing 1, so as to converge and introduce the negative electrode current of the electrode group 8 to the casing 1. Specifically, the negative electrode current collecting plate 9 is welded to the negative electrode lug of the electrode group 8 for converging the negative electrode current of the electrode group 8 and then outputting the negative electrode current. In this embodiment, the negative electrode current collecting plate 9 is welded to the housing 1, so the negative electrode current collector The flow plate 9 and the housing 1 are negatively charged as a whole.

In addition to the above settings, in order to seal the casing 1, the battery also includes a negative electrode cover 10. The negative electrode cover 10 is sealingly connected to the opening of the casing 1, thereby sealing the casing 1 and thereby completing the battery. Assembly work.

As far as the welding method is concerned, there are: Penetration welding process can be used to connect between the ears and between the negative electrode cover 10 and the casing 1 .

It should be noted that the battery in this embodiment can be a cylindrical battery, a rectangular battery, etc., which can be selected according to needs, and is not specifically limited in this embodiment.

To facilitate understanding, the assembly process of the battery in this embodiment is introduced as follows:

The positive pole 2 is installed in the mounting hole of the housing 1 .

Specifically, the positive pole 2 is inserted into the mounting hole of the casing 1, and the limiting protrusion 23 on the positive pole 2 is located outside the casing 1, and the riveting rib 22 on the positive pole 2 is located inside the casing 1 to pass through. The limiting protrusions 23 and the riveting ribs 22 limit the two ends of the positive pole 2 to prevent them from coming out of the installation holes and improve the reliability of the cooperation between the positive pole 2 and the housing 1 .

The upper insulating member 3 is disposed between the limiting protrusion 23 and the outer surface of the housing 1 , the sealing member 4 is disposed between the outer wall of the positive pole 2 and the inner wall of the mounting hole, and the lower insulating member 5 is disposed on the housing 1 on the inner surface.

Specifically, the first insulating part 31 of the upper insulating member 3 is wrapped around the outer periphery of the limiting protrusion 23 , and the second insulating part 32 of the upper insulating member 3 is disposed on the bottom surface of the limiting protrusion 23 and the shell 1 Between the outer surfaces, the first sealing portion 41 of the sealing member 4 is disposed in contact between the outer surface of the housing 1 and the bottom surface of the limiting protrusion 23 , and the end of the first sealing portion 41 is in contact with the second insulating portion. 32 abutting, the second sealing portion 42 of the sealing member 4 is abutting and disposed between the outer wall of the positive pole 2 and the inner wall of the mounting hole. In this arrangement, the first insulating part 31 covers the outer periphery of the limiting protrusion 23, which can protect the limiting protrusion 23 and prevent the limiting protrusion 23 from being damaged by collision. The second insulating part 32 realizes protection against the limiting protrusion 23. The first sealing part 41 seals between the outer surface of the housing 1 and the bottom surface of the limiting protrusion 23, and the second sealing part 42 seals between the outer wall of the positive pole 2 and the mounting hole. The inner walls are sealed and the end of the first sealing part 41 is in contact with the second insulating part 32, which can enhance the sealing performance.

The riveting block 6 is arranged on the outer periphery of the riveting rib 22. The first riveting portion 61 of the riveting block 6 passes through the lower insulating member 5 and contacts the sealing member 4. The second riveting portion 62 of the riveting block 6 is in contact with the inner surface of the housing 1. A lower insulating piece 5 is provided between them.

Specifically, the riveting block 6 is arranged on the outer periphery of the riveting rib 22, which can enhance the structural strength of the positive side of the battery core and at the same time reduce the risk of fracturing of the lower insulating member 5 by the riveting rib 22 during riveting. The first riveting portion 61 of the riveting block 6 The contact between the lower insulating member 5 and the sealing member 4 is avoided, which improves the space utilization of the battery in the height direction. The cooperation between the second riveting portion 62 of the riveting block 6 and the lower insulating member 5 ensures the insulation performance.

Further, the assembly method of the battery also includes: setting a groove 21 at one end of the positive pole 2 located in the housing 1; setting a boss 71 on the side of the positive current collecting plate 7 facing the positive pole 2, and the boss 71 is engaged with the positive pole 2. In the groove 21 , the top surface of the boss 71 is suitable for welding with the bottom surface of the groove 21 . By clamping the boss 71 of the positive electrode current collecting plate 7 into the groove 21 of the positive electrode column 2, and welding the matching parts of the top surface of the boss 71 and the bottom surface of the groove 21, the welding of the two is achieved. Fixed, the cooperation between the top surface of the boss 71 and the bottom surface of the groove 21 increases the welding area, and the groove 21 reduces the welding thickness of the positive pole 2, thereby reducing the welding difficulty, improving the assembly efficiency, and also reducing the The internal contact resistance is reduced, the overcurrent capacity of the battery is increased, and the product yield is improved.

To sum up, the battery of this embodiment has the following advantages: by welding and connecting the bottom surface of the groove 21 of the positive pole 2 and the top surface of the boss 71 of the current collecting plate, the welding area is increased and the contact is reduced. The internal resistance increases the overcurrent capacity of the battery; through the double-table sealing design of the first sealing surface 231 and the second sealing surface 232 on the positive pole 2 and the first sealing part 41 and the second sealing part 42, the Sealing performance: the first riveting part 61 of the riveting block 6 directly contacts the seal 4, avoiding the lower insulator 5, improving the space utilization of the battery in the height direction, and through the second riveting part of the riveting block 6 62 is in contact with the lower insulating member 5 to ensure the insulation performance, thereby providing a battery that can improve the overcurrent capacity and space utilization of the battery.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the appended rights. within the scope of the requirements.

Claims (10)

1. A battery, characterized in that it includes: The shell is provided with mounting holes; The positive pole is installed in the installation hole. One end of the positive pole located outside the housing is provided with a limiting protrusion. One end of the positive pole located within the housing is provided with a riveting rib. The limiting protrusion The riveting ribs and the riveting ribs respectively limit the two ends of the positive pole; An insulating sealing assembly includes an upper insulating member, a sealing member and a lower insulating member. The upper insulating member is provided between the limiting protrusion and the outer surface of the housing. The sealing member is provided in contact with the housing. Between the outer wall of the positive pole and the inner wall of the mounting hole, the lower insulating member is provided on the inner surface of the housing; The riveting block is arranged on the outer periphery of the riveting rib. The riveting block includes a first riveting part and a second riveting part arranged in an up and down step. The first riveting part passes through the lower insulating member and the sealing member. The second riveting part is in contact with the lower insulating piece. 2. The battery according to claim 1, wherein a first deformation release groove is provided on a side of the lower insulator facing the housing, and the first deformation release groove is at least partially located on the sealing member. below. 3. The battery according to claim 2, wherein the lower insulating member is further provided with a second deformation release groove on a side facing the housing, and the second deformation release groove is connected to the second riveting portion. Corresponding settings. 4. The battery according to claim 3, wherein the first deformation release groove is set as an annular groove along the circumferential direction of the seal; and/or the second deformation release groove is formed along the lower insulation The length direction of the component is opened, and the second deformation release groove is connected with the first deformation release groove. 5. The battery according to any one of claims 2 to 4, wherein the sealing member includes: A first sealing portion is provided in contact between the outer surface of the housing and the bottom surface of the limiting protrusion, and the end of the first sealing portion is in contact with the upper insulating member; The second sealing part is disposed in contact between the outer wall of the positive pole and the inner wall of the mounting hole, and the bottom of the second sealing part is in contact with the first riveting part, and the first deformation The release groove is located at least partially below the second sealing portion. 6. The battery according to claim 5, wherein the side of the limiting protrusion facing the housing is provided with a first sealing surface and a second sealing surface arranged in up and down steps, and the first sealing surface The first sealing part is sealingly attached to the first sealing surface, and the second sealing part is sealingly attached to the second sealing surface; And/or, the upper insulating member includes: a first insulating part covering the outer periphery of the limiting protrusion; a second insulating part disposed on the bottom surface of the limiting protrusion and the outer surface of the housing. between the surfaces, and the inner end of the second insulating part is in contact with the first sealing part. 7. The battery according to claim 6, wherein a limiting groove is provided on the outer surface of the housing along the circumferential direction of the mounting hole, and the second insulating part and the first sealing part are both provided on inside the limiting groove. 8. The battery according to any one of claims 1 to 4, wherein one end of the positive pole located in the housing is provided with a groove, and the riveting rib is formed in the circumferential direction of the groove, so The battery further includes a positive current collecting plate located in the housing, a boss is provided on one side of the positive current collecting plate facing the positive pole, the boss is engaged in the groove, and the positive current collecting plate is engaged with the groove. The top surface of the boss is suitable for welding with the bottom surface of the groove. 9. The battery according to claim 8, wherein a supporting rib is provided on a side of the lower insulating member away from the housing, and the supporting rib abuts the positive electrode current collecting plate. 10. The battery according to claim 8, wherein the opening of the groove is provided with a rounded corner, and the boss is engaged in the groove through the rounded corner; And/or, the battery further includes: an electrode group, arranged in the housing, the positive electrode lug of the electrode group is connected to the positive electrode current collecting plate; the negative electrode current collecting plate is connected to the negative electrode lug of the electrode group. are connected to the housing.