CN218827733U

CN218827733U - Riveting structure for power battery and power battery

Info

Publication number: CN218827733U
Application number: CN202222787490.7U
Authority: CN
Inventors: 王有生; 李华; 覃太平
Original assignee: Changzhou Red Fairy Precision Technology Co Ltd
Current assignee: Changzhou Red Fairy Precision Technology Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-04-07
Anticipated expiration: 2032-10-21

Abstract

The utility model relates to a power battery technical field relates to a riveted structure and power battery for power battery. The riveting structure comprises a shell, a pole, a sealing seat and a partition plate; the shell is provided with a mounting hole; the pole comprises a riveting part and a connecting part which are connected, the riveting part sequentially penetrates through the sealing seat and the partition plate, and at least part of the connecting part is abutted against one side of the sealing seat, which is far away from the partition plate; the outer wall of utmost point post is equipped with the groove of bending, and after riveting portion bent, riveting portion is buckled and the butt is kept away from one side of seal receptacle in the baffle from bending the groove towards the baffle from the baffle. In the riveting structure of this embodiment, through set up the groove of bending at the outer wall of utmost point post, when riveting the utmost point post, riveting portion can be towards the groove of bending deformation to it is sealed to make utmost point post carry out the riveting to seal receptacle and baffle, and the deformation of utmost point post when can accommodating the riveting through setting up the groove of bending can improve the riveting intensity and the riveting efficiency of utmost point post from this, and the riveting yield also can improve.

Description

Riveting structure for power battery and power battery

Technical Field

The utility model relates to a power battery technical field especially relates to a riveted structure and power battery for power battery.

Background

With the development of the times, the power battery with the characteristics of energy conservation and environmental protection is gradually popularized and applied in the field of new energy. The existing riveting technology of the cylindrical riveting structure has high riveting reject ratio mainly because the riveting bending part is easy to break, the manufacturing cost of the component is high and the assembly is complex.

Therefore, there is a need for improvement in view of the above problems to change the present situation.

SUMMERY OF THE UTILITY MODEL

The utility model provides a riveted structure and power battery for the fracture appears easily in the riveting department of solving current power battery and leads to the higher problem of defective rate of processing.

The utility model provides a riveted structure for power battery, include:

the shell is provided with a mounting hole;

the sealing seat is inserted into the mounting hole, and at least part of the sealing seat abuts against the outer side of the shell;

the partition plate is arranged in the shell and is positioned on one side of the shell, which is far away from the sealing seat; and

the terminal post comprises a riveting part and a connecting part which are connected, the riveting part sequentially penetrates through the sealing seat and the partition plate, and at least part of the connecting part is abutted against one side of the sealing seat, which is far away from the partition plate; the outer wall of the pole is provided with a bending groove, and after the riveting portion is bent, the riveting portion is bent from the bending groove towards the partition plate and abuts against one side, away from the sealing seat, of the partition plate; wherein, the depth dimension of the bending groove is 0.1-3mm, the angle of the bending groove is a, and 0 degree < a <180 degrees.

According to the utility model discloses an embodiment, riveted structure still includes the sealing ring, the seal receptacle the baffle with the casing encloses to close and forms the seal groove, the sealing ring holding in the seal groove, just riveting portion butt in the outer wall of sealing ring.

According to the utility model discloses an embodiment, the seal receptacle seted up communicate in the first accepting groove of seal groove, the baffle seted up communicate in the second accepting groove of seal groove, first accepting groove with the second accepting groove is used for the crimping portion in accept during the outer wall of sealing ring the sealing ring.

According to the utility model discloses an embodiment, utmost point post still includes spacing portion, spacing portion certainly the outer wall of connecting portion outwards extends, just spacing portion butt in the seal receptacle is kept away from one side of baffle.

According to an embodiment of the present invention, a positioning shoulder groove is formed on a side of the housing away from the partition plate, and at least a portion of the sealing seat is accommodated in the positioning shoulder groove;

and/or one side of the partition board facing the sealing seat is provided with a first positioning groove, and the edge of the mounting hole at least partially extends towards the inside of the first positioning groove.

According to the utility model discloses an embodiment, the second constant head tank has still been seted up to the baffle, the second constant head tank is located and is kept away from one side of first constant head tank, the second constant head tank is used for holding after the riveting portion bends riveting portion.

According to the utility model discloses an embodiment, sealed hole has been seted up to utmost point post, sealed hole along being on a parallel with casing the central axis's direction sets up and runs through utmost point post sets up, riveted structure still includes seal structure, seal structure insert establish and seal in the sealed hole.

According to the utility model discloses an embodiment, sealed hole is including the sealed chute and the connecting hole portion that are linked together, sealed chute certainly the connecting hole portion orientation is kept away from the axis direction of sealed hole extends, seal structure is equipped with sealed inclined plane, seal structure inserts and locates in the connecting hole portion, just sealed inclined plane with the laminating of sealed chute is sealed.

According to the utility model discloses an embodiment, seal structure includes sealing member and sealing washer, the sealing washer cover is located on the sealing member, the sealing member inlays to be located in the sealing hole, just the sealing washer seal in the sealing hole with between the sealing member.

The utility model also provides a power battery, include as above-mentioned arbitrary one riveted structure.

Implement the embodiment of the utility model provides a, following beneficial effect has:

in the riveting structure of this embodiment, through set up the groove of bending at the outer wall of utmost point post, when riveting the utmost point post, riveting portion can be towards the groove of bending deformation to it is sealed to make utmost point post carry out the riveting to seal receptacle and baffle, and the deformation of utmost point post when can accommodating the riveting through setting up the groove of bending can improve the riveting intensity and the riveting efficiency of utmost point post from this, and the riveting yield also can improve.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

fig. 1 is a schematic structural diagram of a power battery according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a riveted structure in an embodiment of the invention;

fig. 3 is a cross-sectional view of a riveted structure in an embodiment of the invention after riveting;

FIG. 4 is an exploded view of a riveted structure in an embodiment of the invention;

reference numerals:

10. riveting structure;

100. a housing; 110. mounting holes; 120. positioning the shoulder groove;

200. a pole column; 210. riveting the pressing part; 220. a connecting portion; 230. bending the groove; 240. sealing the hole; 241. sealing the chute; 242. a connection hole portion; 250. a limiting part;

300. a sealing seat; 310. a first receiving groove;

400. a partition plate; 410. a second receiving groove; 420. a sealing groove; 430. a first positioning groove; 440. a second positioning groove;

500. a seal ring;

600. a sealing structure; 610. a seal member; 611. sealing the inclined plane; 620. and (5) sealing rings.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 4, the embodiment of the present invention provides a power battery and a riveting structure 10 for the power battery, specifically, the riveting structure 10 includes a housing 100, a pole 200, a sealing seat 300 and a partition 400; the housing 100 is provided with a mounting hole 110; the sealing seat 300 is inserted into the mounting hole 110, and at least a part of the sealing seat 300 abuts against the outer side of the housing 100; the partition 400 is disposed inside the casing 100, and the partition 400 is located on a side of the casing 100 away from the sealing seat 300; the pole 200 comprises a riveting part 210 and a connecting part 220 which are connected, the riveting part 210 sequentially penetrates through the sealing seat 300 and the partition board 400, and at least part of the connecting part 220 abuts against one side of the sealing seat 300, which is far away from the partition board 400; the outer wall of the pole post 200 is provided with a bending groove 230, and after the riveting portion 210 is bent, the riveting portion 210 is bent from the bending groove 230 toward the separator 400 and abuts against one side of the separator 400 away from the sealing seat 300.

In the riveted structure 10 of the present embodiment, by providing the bending groove 230 on the outer wall of the pole post 200, when riveting the pole post 200, the riveting portion 210 can be deformed toward the bending groove 230 so that the pole post 200 can be rivet-pressed and sealed with the seal receptacle 300 and the separator 400, and by providing the bending groove 230, the deformation of the pole post 200 during riveting can be accommodated, whereby the riveting strength and the riveting efficiency of the pole post 200 can be improved, and the riveting yield can be improved. Specifically, the depth dimension L of the bending groove is 0.1-3mm, the angle of the bending groove is a, and 0 ° < a <180 °.

It should be noted that, compared to the riveting structure of the existing battery, because the bending groove 230 in this embodiment is not provided, in the riveting process, a stress concentration phenomenon easily occurs at the bending portion of the pole, and a fracture phenomenon easily occurs due to deformation of the local structure at this position, which is just one of the reasons that the riveting structure of the power battery in the prior art is poor in strength, the riveting structure 10 of the power battery of this application can improve the stress concentration phenomenon by providing the bending groove 230 on the outer wall of the pole 200, and when the riveting portion 210 bends relative to the connecting portion 220, the deformation of the local structure can extend toward the bending groove 230, and at the same time, the overall strength of the pole 200 cannot be reduced, and after the riveting portion 210 bends, the inner walls of the bending groove 230 are mutually attached to each other, and the purpose of improving the riveting strength of the pole 200 can be achieved by the above arrangement, and at the same time, the structure is simple, and the processing cost can also be controlled.

Specifically, as shown in fig. 2, in this embodiment, the bending groove 230 may be a V-shaped groove, and an opening of the V-shaped groove extends toward a direction away from the central axis of the terminal post 200, as shown in fig. 3, after the riveting portion 210 is riveted and bent, inner walls of the V-shaped groove may be attached to each other, so that the inner side surface of the terminal post 200 is flat, and the overall strength is high. In other embodiments, the bending groove 230 may also be a circle, a semicircle or an irregular shape, and is specifically designed according to the actual riveting requirement of the pole 200, which is not limited herein.

Further, as shown in fig. 2 to fig. 4, the riveting structure 10 further includes a sealing ring 500, the sealing seat 300, the partition plate 400 and the housing 100 enclose to form a sealing groove 420, the sealing ring 500 is accommodated in the sealing groove 420, and the riveting portion 210 abuts against an outer wall of the sealing ring 500.

When the riveting structure 10 of this embodiment is assembled, firstly, the insulating sealing seat 300 (which may be made of a plastic material) is sleeved on the connecting portion 220 of the post 200, and then the insulating sealing seat 300 and the connecting portion are inserted into the mounting hole 110, then the insulating separator 400 (which may be made of a plastic material) is placed inside the housing 100, and the separator 400 is attached to the inner side surface of the housing 100 and is sleeved on the outer side of the connecting portion 220, at this time, the riveting portion 210 penetrates through the separator 400 and extends into the housing 100, and then the sealing ring 500 is sleeved on the post 200 so as to be located in the sealing groove 420, as shown in the placing direction shown in fig. 2 and 3, the riveting portion 210 is riveted from bottom to top, so that the riveting portion 210 is pressed on the side of the separator 400 away from the sealing seat 300, thereby compressing the sealing ring 500 to achieve the sealing effect, and simultaneously, the sealing seat 300 and the separator 400 can be fixed on the post 200 and the housing 100; in this embodiment, seal between the post 200 and the casing 100, the seal receptacle 300 and the partition 400 by providing the seal ring 500, the sealing state inside the casing 100 can be ensured, so as to improve the durability of the power battery, specifically, the seal ring 500 can be made of flexible materials such as rubber and silica gel, so as to ensure the sealing effect of the riveted structure 10.

In an embodiment, the seal holder 300 defines a first receiving groove 310 communicating with the seal groove 420, the partition 400 defines a second receiving groove 410 communicating with the seal groove 420, and the first receiving groove 310 and the second receiving groove 410 are used for receiving the seal ring 500 when the rivet 210 is pressed against the outer wall of the seal ring 500.

It is understood that, in the preferred embodiment, the sealing ring 500 is required to be generally flexible and have a certain deformation space, and by arranging the first receiving groove 310 and the second receiving groove 410 to cooperate with the sealing groove 420, when the rivet portion 210 is crimped on the sealing ring 500, the sealing ring 500 may extend towards the first receiving groove 310 and/or the second receiving groove 410 to increase the contact area between the sealing ring 500 and the sealing seat 300 and between the sealing seat 300 and the partition 400, thereby improving the sealing effect of the sealing ring 500.

Specifically, the pole 200 further includes a limiting portion 250, the limiting portion 250 extends outward from the outer wall of the connecting portion 220, and the limiting portion 250 abuts against one side of the sealing seat 300 away from the partition 400.

By arranging the limiting portion 250 on the side of the connecting portion 220 away from the riveting portion 210, when the riveting structure 10 of the embodiment is assembled, the limiting portion 250 can abut against the sealing seat 300 to limit the position between the two, and after the riveting portion 210 is riveted and bent, the riveting portion 210, the connecting portion 220 and the limiting portion 250 can form an i-shaped structure, so that the sealing seat 300, the partition plate 400 and the sealing ring 500 can be fixed and fixed on the housing 100.

In one embodiment, a positioning shoulder groove 120 is formed on a side of the casing 100 away from the partition 400, and the seal holder 300 is at least partially received in the positioning shoulder groove 120.

With this arrangement, when the seal holder 300 is combined with the housing 100, since the seal holder 300 is at least partially received in the positioning shoulder groove 120, the positioning shoulder groove 120 can not only position the installation of the seal holder 300 to ensure the installation accuracy of the caulking structure 10, but also make the structure between the seal holder 300 and the housing 100 more compact.

Further, a first positioning groove 430 is formed on a side of the partition 400 facing the sealing seat 300, and an edge of the mounting hole 110 at least partially extends into the first positioning groove 430.

Through setting up first positioning groove 430 on baffle 400, when baffle 400 is assembled in casing 100, because the partial structure of casing 100 in mounting hole 110 department extends towards the inside of casing 100, so this partial structure can correspond with first positioning groove 430, not only can fix a position the installation of baffle 400, can make the structure between baffle 400 and casing 100 more compact simultaneously, thereby reduce the occupation space of baffle 400 in casing 100 is inside, with the space that can hold energy storage component of improvement casing 100, excellent in use effect.

In an embodiment, the partition board 400 further defines a second positioning groove 440, the second positioning groove 440 is disposed on a side away from the first positioning groove 430, and the second positioning groove 440 is used for accommodating the riveting portion 210 after the riveting portion 210 is bent.

From this setting, after riveting portion 210 is riveted and is buckled, riveting portion 210 can cooperate with second constant head tank 440 of baffle 400, and second constant head tank 440 not only can fix a position riveting portion 210's mounted position this moment, also can make baffle 400 and utmost point post 200 have more compact structure on the central line extending direction of riveted structure 10 simultaneously, excellent in use effect.

Specifically, the terminal post 200 is opened with a sealing hole 240, the sealing hole 240 is disposed along a direction parallel to the central axis of the housing 100 and penetrates through the terminal post 200, and the riveting structure 10 further includes a sealing structure 600, and the sealing structure 600 is inserted and sealed in the sealing hole 240.

In this embodiment, through having seted up sealed hole 240 on utmost point post 200, sealed hole 240 can be used for power battery's notes liquid operation, annotates the liquid operation through sealed hole 240 towards the inside of casing 100 promptly, and after annotating the liquid completion, can seal sealed hole 240 through the seal structure 600 that sets up, simple structure, and the assembly is convenient.

Further, the sealing hole 240 includes a sealing inclined groove 241 and a connecting hole portion 242 which are communicated with each other, the sealing inclined groove 241 extends from the connecting hole portion 242 towards the axial direction far away from the sealing hole 240, the sealing structure 600 is provided with a sealing inclined surface 611, the sealing structure 600 is inserted into the connecting hole portion 242, and the sealing inclined surface 611 and the sealing inclined groove 241 are in fit sealing.

With the arrangement, after the sealing structure 600 is assembled in the sealing hole 240, the sealing inclined plane 611 of the sealing structure 600 can be attached to the sealing inclined groove 241 of the sealing hole 240, so that the contact area between the sealing inclined plane and the sealing inclined groove is increased, and meanwhile, the connecting hole part 242 can be matched with the sealing structure 600 to position the mounting position of the sealing inclined plane and the sealing inclined groove, so that the structure is simple, and the sealing effect is good.

In one embodiment, the sealing structure 600 includes a sealing member 610 and a sealing ring 620, the sealing ring 620 is sleeved on the sealing member 610, the sealing member 610 is embedded in the sealing hole 240, and the sealing ring 620 is sealed between the sealing hole 240 and the sealing member 610.

In this embodiment, the sealing ring 620 may be made of a flexible material, such as rubber, silica gel, etc., which is resistant to corrosion of electrolyte, and after the sealing element 610 and the sealing hole 240 are combined and fixed, the sealing element 610 and the sealing hole 240 may be sealed by the sealing ring 620; in other embodiments, the sealing ring 620 may also be formed by curing a sealant, which is not described herein. After the sealing structure 600 is fixedly connected to the sealing hole 240, a busbar or a load may be welded to the pole 200 and/or the sealing structure 600.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but 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 thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A riveted joint structure for a power battery, characterized by comprising:

the shell is provided with a mounting hole;

the sealing seat is inserted into the mounting hole and at least partially abuts against the outer side of the shell;

the terminal post comprises a riveting part and a connecting part which are connected, the riveting part is sequentially arranged in the sealing seat and the partition plate in a penetrating manner, and at least part of the connecting part is abutted against one side of the sealing seat, which is far away from the partition plate; the outer wall of the pole is provided with a bending groove, and after the riveting portion is bent, the riveting portion is bent from the bending groove towards the partition plate and abuts against one side, away from the sealing seat, of the partition plate; wherein, the depth dimension of the bending groove is 0.1-3mm, the angle of the bending groove is a, and 0 degree < a <180 degrees.

2. The riveting structure for the power battery as claimed in claim 1, wherein the riveting structure further comprises a sealing ring, the sealing seat, the partition plate and the casing are enclosed to form a sealing groove, the sealing ring is accommodated in the sealing groove, and the riveting portion abuts against the outer wall of the sealing ring.

3. The riveting structure for the power battery as recited in claim 2, wherein the seal seat defines a first receiving groove communicated with the seal groove, the partition defines a second receiving groove communicated with the seal groove, and the first receiving groove and the second receiving groove are configured to receive the seal ring when the rivet portion is pressed against the outer wall of the seal ring.

4. The riveting structure for the power battery according to claim 1, wherein the pole further comprises a limiting part, the limiting part extends outwards from the outer wall of the connecting part, and the limiting part abuts against one side, away from the partition plate, of the sealing seat.

5. The riveting structure for the power battery as recited in claim 1, wherein a positioning shoulder groove is formed on one side of the shell away from the partition plate, and the sealing seat is at least partially accommodated in the positioning shoulder groove;

6. The riveting structure for the power battery as claimed in claim 5, wherein the partition board is further provided with a second positioning groove, the second positioning groove is arranged on one side far away from the first positioning groove, and the second positioning groove is used for accommodating the riveting portion after the riveting portion is bent.

7. The riveted structure for the power battery according to claim 1, wherein the pole is provided with a sealing hole, the sealing hole is arranged in a direction parallel to the central axis of the shell and penetrates through the pole, and the riveted structure further comprises a sealing structure which is inserted and sealed in the sealing hole.

8. The riveting structure for the power battery according to claim 7, wherein the sealing hole comprises a sealing inclined groove and a connecting hole part which are communicated, the sealing inclined groove extends from the connecting hole part towards the axial direction far away from the sealing hole, the sealing structure is provided with a sealing inclined surface, the sealing structure is inserted into the connecting hole part, and the sealing inclined surface is in fit sealing with the sealing inclined groove.

9. The riveted joint structure for the power battery according to claim 7, wherein the sealing structure comprises a sealing element and a sealing ring, the sealing ring is sleeved on the sealing element, the sealing element is embedded in the sealing hole, and the sealing ring is sealed between the sealing hole and the sealing element.

10. A power cell comprising a riveted joint structure according to any one of claims 1 to 9.