CN217691381U - Riveting assembly structure of battery top cover and integrated battery top cover assembly - Google Patents

Abstract

The utility model discloses a riveting assembly structure of battery top cap and integral type battery top cap subassembly, riveting assembly structure include utmost point post and set up the utmost point post hole site on the battery top cap, utmost point post hole site includes the utmost point post hole, and utmost point post is located utmost point post hole top, and the upper mouth in utmost point post hole is formed with the location body along circumference, and the location body sets up around the fixed part ground of utmost point post, is equipped with first restriction body on the location body, is provided with the sealing member between the fixed part of location body and utmost point post; the inner wall of the positioning body is provided with second limiting bodies which are continuously arranged or a plurality of second limiting bodies which are arranged at intervals, a first sealing part which is attached to the lower edge of the fixing part of the pole is formed on the sealing element, the second limiting bodies are pressed on the first sealing part, an insulating element is arranged between the first limiting bodies and the fixing part of the pole, and the sealing element is made of insulating materials; the riveting assembly structures are respectively assembled at two ends of the battery top cover. The assembly is simple and convenient, the assembly efficiency is improved, and the manufacturing cost is low.

Description

Riveting assembly structure of battery top cover and integrated battery top cover assembly

Technical Field

The utility model relates to a technical field of battery top cap, concretely relates to riveting assembly structure and integral type battery top cap subassembly of battery top cap.

Background

The power battery is an important component of the new energy vehicle, and the existing new energy battery mostly adopts a lithium ion battery as the power battery. For a power lithium battery, besides the key components such as the battery core and the BMS, the structure of the battery shell is also an important factor for the safety of the power lithium battery. Wherein, utmost point post is battery module's component, and the installation of general utmost point post is in utmost point post hole lower lip edge department through the becket welding on battery module's top cap, then make the sealing member obtain fixedly at the lower tip of utmost point post, and play utmost point post and top cap insulating effect, nevertheless only through the becket welding, make the sealing member respectively with utmost point post and top cap between the tight fit degree relatively poor, lead to the leakproofness poor, make battery module's stability in use poor, there is the potential safety hazard, and structural strength is also relatively poor.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one technical defect, the utility model provides a following technical scheme:

the riveting assembly structure of the battery top cover comprises a pole and a pole hole site arranged on the battery top cover, wherein the pole hole site comprises a pole hole, the pole is positioned above the pole hole, a positioning body is formed at the upper opening of the pole hole along the circumferential direction, the positioning body is arranged around a fixing part of the pole, a first limiting body continuously arranged around an electric connection part of the pole or a plurality of first limiting bodies arranged at intervals are arranged on the positioning body, and a sealing element is arranged between the positioning body and the fixing part of the pole; a distance exists between the limiting body and the electric connection part of the pole; the inner wall of the positioning body is provided with second limiting bodies which are continuously arranged or a plurality of second limiting bodies which are arranged at intervals, a first sealing part which is attached to the lower edge of the fixing part of the pole is formed on the sealing element, the second limiting bodies are pressed on the first sealing part, an insulating element is arranged between the first limiting bodies and the fixing part of the pole, and the sealing element is made of insulating materials.

According to utmost point post riveting assembly structure above, be formed with the second sealing on the sealing member, the laminating of second sealing and the downside of insulating part.

According to the pole riveting assembly structure, the second sealing part comprises a sealing ring body formed on the sealing element, and the sealing ring body is embedded into the annular groove at the upper edge of the fixing part of the pole; the upper side of the sealing ring body is flush with the upper side of the fixing part of the pole, and the sealing ring body and the fixing part are both attached to the lower side surface of the insulating part.

According to the pole riveting and assembling structure, the second limiting body comprises a concave part formed by rolling grooves on the outer wall of the positioning body, so that the inner wall of the positioning body forms a convex part corresponding to the concave part, and a first sealing part which is turned inwards on the sealing element and is tightly attached to the lower edge of the fixing part of the pole is formed.

According to the pole riveting and assembling structure, the insulating part is provided with a plurality of first convex parts, the pole is provided with a plurality of first concave parts, and the first convex parts are correspondingly embedded into the first concave parts.

According to above utmost point post riveting assembly structure, the insulating part is formed with the second convex part and arranges the first insulating bulge loop in the interval including the insulating ring body that is located the electric connection portion of utmost point post on the insulating ring body, be formed with the second concave part that corresponds with second convex part position on the first restriction body, the second convex part corresponds imbeds in the second concave part.

According to the pole riveting assembly structure, the first plastic part is covered on the positioning body and comprises the covering ring piece covering the top of the positioning body and the covering ring body formed on the edge of the covering ring piece, the electric connection part of the pole penetrates through the inner hole of the covering ring piece, the inner wall of the covering ring body is provided with the positioning block and the convex hull corresponding to the concave position, the positioning groove corresponding to the positioning block is formed in the positioning body, the positioning block is correspondingly inserted into the positioning groove, and the convex hull is correspondingly buckled into the concave.

According to the pole riveting and assembling structure, the second insulating convex rings arranged in the intervals are formed on the cladding ring pieces.

As another aspect of the present invention, an integrated battery top cap assembly includes a battery top cap, and a positive electrode assembly and a negative electrode assembly disposed on the battery top cap; anodal subassembly and negative pole subassembly adopt as above the riveting assembly structure of battery top cap, be provided with explosion-proof valve opening and first notes liquid hole on the battery top cap, be provided with the explosion-proof valve block in the explosion-proof valve opening.

According to above integral type battery top cap subassembly, still mould the piece including the second that fits in battery top cap bottom surface, port department all is fixed with solid fixed ring under the utmost point post hole that is used for anodal subassembly assembly on the battery top cap and the utmost point post hole of negative pole subassembly assembly, form the catching groove between solid fixed ring and the second restriction body, be provided with respectively on the second mould the piece with be used for anodal subassembly assembly on the battery top cap two second through-holes that utmost point post hole and the utmost point post hole position of negative pole subassembly assembly correspond, the last port limit of two second through-holes is formed with the buckle, the buckle lock joint is in the catching groove, it annotates the liquid hole with the second that first notes liquid hole position corresponds to be provided with on the second mould the piece, and sink the groove under with explosion-proof valve hole position corresponds, sink the bottom in groove and be provided with a plurality of perforation.

Compared with the prior art, the beneficial effects of the utility model are that:

1. utilize the internal wall of location body to form the second restriction body, in order to suppress the first sealing portion deformation back of sealing member, thereby with the fixed part of utmost point post, sealing member and insulating part are fixed between the first restriction body and the second restriction body of location body, and obtain sealed, stable assembly, it is inseparabler to reach the cooperation between utmost point post and the sealing member, promote the sealing performance between utmost point post and the utmost point post hole, and the steadiness of structure is better, and remove the technology that utilizes welded fastening utmost point post in the traditional mode, make the assembly simple and convenient, promote assembly efficiency, low in manufacturing cost.

2. The first piece of moulding in advance adopts the first piece of moulding in advance to utilize the convex closure to detain in going into the sunken, should mould the piece in the locating piece embedding constant head tank to fix, so that the structure is reliable, the assembly is simple, high-efficient, also is convenient for dismantle the recovery, reaches green's purpose.

3. Utilize solid fixed ring to fix at utmost point post hole end opening edge for form the catching groove between solid fixed ring and the second restriction portion, thereby the second is moulded a laminating and is gone into in the catching groove and fix the second through the buckle that the second moulded a piece after battery top cap lower surface, makes the assembly simple and convenient, promotes assembly efficiency.

Drawings

FIG. 1 is a cross-sectional view of a unitary cell cap assembly;

FIG. 2 is a cross-sectional view of the unitary cell top cap assembly (II);

FIG. 3 is an exploded view of the unitary header assembly;

FIG. 4 is an exploded view of the unitary top cap assembly (II);

FIG. 5 is a schematic view of the overall construction of the one-piece header assembly;

fig. 6 is a schematic structural diagram of an integrated battery top cover assembly with an integrated structure of a battery top cover and an explosion-proof valve plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only 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 all belong to the protection scope of the present invention.

The embodiment is as follows:

as shown in fig. 1-5, the integrated battery top cover 1 assembly described in the present embodiment is applied to one end of a battery shell of a power battery, and includes a battery top cover 1, and a positive electrode assembly 101 and a negative electrode assembly 102 disposed on the battery top cover 1; be provided with explosion-proof valve opening 12 and first notes liquid hole 13 on battery top cap 1, be provided with explosion-proof valve block 9 in the explosion-proof valve opening 12, wherein 2 formula structures as an organic whole of utmost point post in the anodal subassembly 101 adopts the aluminium piece, and utmost point post 2 in the negative pole subassembly 102 is split type structure, by the copper aluminium alloy of aluminium piece and the compound formation of copper piece looks, anodal subassembly 101 and negative pole subassembly 102 include the riveting assembly structure of battery top cap 1, consequently, utmost point post 2 in the anodal subassembly 101 and utmost point post 2 in the negative pole subassembly 102 utilize the riveting assembly structure to assemble to the both ends of battery top cap 1, and explosion-proof valve opening 12 and first notes liquid hole 13 are located between anodal subassembly 101 and the negative pole subassembly 102, and the last port of explosion-proof valve opening 12 is pasted and is had diaphragm 10.

The explosion-proof valve plate 9 and the explosion-proof valve hole 12 can be welded and fixed, please refer to fig. 1; or the explosion-proof valve plate 9 can also be an integrated structure combined with the battery top cover 1, please refer to fig. 6, and is formed in the explosion-proof valve hole 12.

Specifically, the riveting assembly structure of the battery top cover 1 comprises a pole post 2 and a pole post hole 11 arranged on the battery top cover 1, the pole post 2 is positioned above the pole post hole 11, a positioning body 111 is formed on the upper opening of the pole post hole 11 along the circumferential direction, the positioning body 111 is arranged around a fixing part 21 of the pole post 2, a first limiting body 112 continuously arranged around an electric connection part 22 of the pole post 2 or a plurality of first limiting bodies 112 arranged at intervals are arranged on the positioning body 111, and a sealing member 3 is arranged between the positioning body 111 and the fixing part 21 of the pole post 2; a distance exists between the limiting body and the electric connection part 22 of the pole 2, and the second limiting body 113 has electric conductivity and is isolated by the distance based on an aluminum top cover sheet formed by mutually combining the positioning body 111, the battery top cover 1, the first limiting body 112 and the second limiting body; the inner wall of the positioning body 111 is formed with a second limiting body 113 which is continuously arranged or a plurality of second limiting bodies 113 which are arranged at intervals, the sealing element 3 is formed with a first sealing part 31 which is attached to the lower edge of the fixing part 21 of the pole 2, the second limiting body 113 is pressed on the first sealing part 31, an insulating part 8 is arranged between the first limiting body 112 and the fixing part 21 of the pole 2, and the sealing element 3 is a sealing ring made of insulating material.

In this embodiment, the sealing member 3 is formed with a second sealing portion 32, the second sealing portion 32 is attached to the lower side surface of the insulating member 8, and the sealing performance of the pole 2 is improved after the pole is assembled, and the second sealing portion 32 is an annular ring.

Preferably, in order to make the assembly of the insulating member 8 easier, the second sealing portion 32 comprises a sealing ring body formed on the sealing member 3, which is embedded in an upper edge annular groove 211 of the fixing portion 21 of the pole 2; the upper side of the sealing ring body is flush with the upper side of the fixing part 21 of the pole 2 and is attached to the lower side of the insulating part 8.

In this embodiment, the second limiting body 113 includes a recess 114 formed by rolling a groove on the outer wall of the positioning body 111, so that a protrusion 117 corresponding to the position of the recess 114 is formed on the inner wall of the positioning body 111, so as to form the first sealing portion 31 folded inwards on the sealing member 3 and tightly attached to the lower edge of the fixing portion 21 of the pole 2, and the protrusion 117 is formed to deform the lower edge of the sealing member 3 so as to form the first sealing portion 32, thereby completing the assembly and fixation of the insulating member 8, the sealing member 3 and the fixing portion 21 of the pole 2 between the first limiting body 112 and the second limiting body 113, so that the sealing performance is better, and the structure is stable after the assembly.

In this embodiment, the insulating member 8 is formed with a plurality of first convex portions 81, the terminal post 2 is formed with a plurality of first concave portions 212, and the first convex portions 81 are correspondingly embedded into the first concave portions 212, so that the insulating member 8 is prevented from being displaced after being assembled, and the insulating member 8 is reliably positioned.

Preferably, the insulating part 8 includes the insulating ring body 80 that is located the electric connection portion 22 of utmost point post 2, is formed with the second convex part 82 on the insulating ring body 80 and arranges the first insulating bulge loop 83 in the interval in, is formed with the second concave part 116 that corresponds with second convex part 82 position on the first regulating body 112, and the second convex part 82 corresponds imbeds in the second concave part 116, to reliable insulating isolation between the first regulating body 112 and the electrically conductive spliced pole of utmost point post 2 to reach effective location to the insulating part 8.

In this embodiment, the positioning device further includes a first plastic part 5 covering the positioning body 111, the first plastic part 5 includes a covering ring 51 covering the top of the positioning body 111, and a covering ring 52 formed on the edge of the covering ring 51, the electrical connection portion 22 of the pole 2 penetrates through an inner hole of the covering ring 51, a positioning block 522 and a convex hull 521 corresponding to the position of the concave 114 are formed on an inner wall of the covering ring 52, a positioning groove 115 corresponding to the positioning block 522 is formed on the positioning body 111, the positioning block 522 is correspondingly inserted into the positioning groove 115, the convex hull 521 is correspondingly buckled into the concave 114, and the positioning body 111 is assembled on the positioning body 111 through the first plastic part 5 which is pre-injection molded, and of course, the positioning body 111 can also be assembled in a direct injection molding and encapsulation molding manner.

Preferably, the covering ring 51 is formed with a second insulating protruding ring 53 disposed in the space, which provides reliable insulation between the first limiting body 112 and the conductive connection post of the terminal 2, and can achieve effective positioning of the first plastic part 5.

Still mould a 6 including the second that pastes in battery top cap 1 bottom surface, be used for utmost point post hole 11 lower port of anodal subassembly 101 assembly and utmost point post hole 11 lower port department of negative pole subassembly 102 assembly on the battery top cap 1 all to be fixed with solid fixed ring 4, form catching groove 7 between solid fixed ring 4 and the second restriction body 113, be provided with on the second mould 6 respectively with battery top cap 1 on be used for utmost point post hole 11 of anodal subassembly 101 assembly and two second through-holes that utmost point post hole 11 position of negative pole subassembly 102 assembly corresponds, the last port limit of two second through-holes is formed with buckle 62, buckle 62 lock joint is in catching groove 7.

The second plastic part 6 is provided with a second liquid injection hole 64 corresponding to the first liquid injection hole 13 and a sinking groove 63 corresponding to the explosion-proof valve hole 12, and the bottom of the sinking groove 63 is provided with a plurality of through holes 631; the sink groove 63 is provided to buffer the pressure in the battery from impacting the explosion-proof valve.

The specific assembling process of assembling the positive electrode assembly 101 and the negative electrode assembly 102 to the two ends of the battery top cover 1 includes the steps of firstly sleeving the sealing element 3 on the fixing part 21 of the pole post 2, embedding the second sealing part 32 of the sealing element 3 into the annular groove 211 of the fixing part 21, enabling the lower edge of the sealing element 3 to be in a vertical state, then enabling the pole post 2 and the insulating element 8 to penetrate through the pole post hole 11 from bottom to top, enabling the pole post hole 11 to be arranged above the pole post hole 11, enabling the fixing part 21 of the pole post 2 to be arranged in a cavity formed by enclosing of the positioning body 111, enabling the upper end of the electric connecting part 22 of the pole post 2 to penetrate through a hole formed by enclosing of the first limiting body 112, enabling the upper side face of the fixing part 21 of the pole post 2 to be attached to the insulating element 8, enabling the insulating element 8 to be attached to the lower side face of the first limiting body 112, then implementing a groove rolling process on the battery top cover 1 with the pole posts 2 assembled at the pole post holes 11 at the two ends in a groove rolling device, so as to roll the outer wall at the root part of the positioning body 111 to form a recess 114, correspondingly, a bulge 117 corresponding to the position of the recess 114 is formed on the inner wall of the positioning body 111, the lower edge of the sealing element 3 is folded inwards to form a first sealing part 31 attached to the lower edge of the fixing part 21 of the pole 2 by the formation of the bulge 117, the first sealing part 31 is pressed by the bulge 117 to complete the fixation of the pole 2 in a cavity surrounded by the positioning body 111, then the fixing ring 4 is welded and fixed at the lower ports of the two pole holes 11, a buckling groove 7 is formed between the fixing ring 4 and the second limiting body 113, the positioning body 111 is covered with the first plastic part 5, the convex hull 521 of the first plastic part 5 is correspondingly buckled in the recess 114, the positioning block 522 of the first plastic part 5 is correspondingly inserted into the positioning groove 115, the pre-injection molded second plastic part 6 is attached to the bottom surface of the battery top cover 1, and the buckle 62 is buckled in the buckling groove 7 to complete the assembly of the battery top cover 1, if the explosion-proof valve plate 9 is of a welded structure, after the fixing ring 4 is welded, the explosion-proof valve plate 9 is welded in the explosion-proof valve hole 12.

Above only the utility model discloses a preferred embodiment, the utility model discloses a scope not only limits in above-mentioned embodiment, and the fan belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The riveting assembly structure of the battery top cover comprises a pole (2) and a pole hole (11) arranged on the battery top cover (1), and is characterized in that the pole (2) is positioned above the pole hole (11), a positioning body (111) is formed on the upper opening of the pole hole (11) along the circumferential direction, the positioning body (111) is arranged around a fixing part (21) of the pole (2), a first limiting body (112) continuously arranged around an electric connection part (22) of the pole (2) or a plurality of first limiting bodies (112) arranged at intervals are arranged on the positioning body (111), and a sealing element (3) is arranged between the positioning body (111) and the fixing part (21) of the pole (2); a distance exists between the limiting body and the electric connection part (22) of the pole (2); the inner wall of the positioning body (111) is provided with second limiting bodies (113) which are continuously arranged or a plurality of second limiting bodies (113) which are arranged at intervals, a first sealing part (31) which is attached to the lower edge of a fixing part (21) of the pole (2) is formed on the sealing element (3), the second limiting bodies (113) are pressed on the first sealing part (31), an insulating element (8) is arranged between the first limiting bodies (112) and the fixing part (21) of the pole (2), and the sealing element (3) is made of insulating materials.

2. The rivet press-fitting structure of a battery top cap according to claim 1, wherein the sealing member (3) is formed with a second sealing portion (32), and the second sealing portion (32) is fitted to the lower side of the insulating member (8).

3. The rivet press assembly structure of the battery top cover according to claim 2, characterized in that the second sealing portion (32) comprises a sealing ring body formed on the sealing member (3), the sealing ring body is embedded in the upper edge ring groove (211) of the fixing portion (21) of the terminal post (2); the upper side of the sealing ring body is flush with the upper side of the fixing part (21) of the pole (2) and is attached to the lower side of the insulating part (8).

4. The rivet pressing assembly structure of the battery top cover according to any one of claims 1 to 3, characterized in that the second limiting body (113) comprises a recess (114) formed by rolling grooves on the outer wall of the positioning body (111) and a protrusion (117) formed on the inner wall of the positioning body (111) and corresponding to the position of the recess (114), so as to form a first sealing part (31) which is folded inwards on the sealing member (3) and is tightly attached to the lower edge of the fixing part (21) of the pole (2).

5. The rivet pressing assembly structure of the battery top cover according to any one of claims 1 to 3, characterized in that a plurality of first convex portions (81) are formed on the insulating member (8), a plurality of first concave portions (212) are formed on the pole (2), and the first convex portions (81) are correspondingly embedded in the first concave portions (212).

6. The riveting assembly structure of the battery top cover according to claim 5, characterized in that the insulating member (8) comprises an insulating ring body (80) positioned at the electric connection part (22) of the pole (2), a second convex part (82) and a first insulating convex ring (83) arranged in the interval are formed on the insulating ring body (80), a second concave part (116) corresponding to the second convex part (82) is formed on the first limiting body (112), and the second convex part (82) is correspondingly embedded into the second concave part (116).

7. The riveting assembly structure of the battery top cover according to claim 4, further comprising a first plastic part (5) covered on the positioning body (111), wherein the first plastic part (5) comprises a wrapping ring sheet (51) covering the top of the positioning body (111) and a wrapping ring body (52) formed on the edge of the wrapping ring sheet (51), the electric connection part (22) of the pole (2) penetrates through the inner hole of the wrapping ring sheet (51), a positioning block (522) and a convex hull (521) corresponding to the position of the recess (114) are formed on the inner wall of the wrapping ring body (52), a positioning groove (115) corresponding to the positioning block (522) is formed on the positioning body (111), the positioning block (522) is correspondingly inserted into the positioning groove (115), and the convex hull (521) is correspondingly buckled into the recess (114).

8. The rivet press-fitting structure of battery top cap according to claim 7, characterized in that the wrapping ring piece (51) is formed with a second insulating collar (53) disposed in the space.

9. An integrated battery top cover component comprises a battery top cover (1), and a positive electrode component (101) and a negative electrode component (102) which are arranged on the battery top cover (1); the battery top cover is characterized in that the positive electrode assembly (101) and the negative electrode assembly (102) adopt the terminal post riveting assembly structure of the battery top cover according to any one of claims 5 to 8, an explosion-proof valve hole (12) and a first liquid injection hole (13) are arranged on the battery top cover (1), and an explosion-proof valve plate (9) is arranged in the explosion-proof valve hole (12).

10. The integrated battery top cover assembly according to claim 9, further comprising a second plastic part (6) attached to the bottom surface of the battery top cover (1), wherein a fixing ring (4) is fixed at the lower port of the pole hole (11) for assembling the positive pole assembly (101) and the lower port of the pole hole (11) for assembling the negative pole assembly (102) on the battery top cover (1), a buckling groove (7) is formed between the fixing ring (4) and the second limiting body (113), two second through holes corresponding to the positions of the pole hole (11) for assembling the positive pole assembly (101) and the pole hole (11) for assembling the negative pole assembly (102) on the battery top cover (1) are formed on the second plastic part (6), a buckle (62) is formed at the edge of the upper ports of the two second through holes, the buckle (62) is buckled in the buckling groove (7), a second through hole (64) corresponding to the position of the first liquid injection hole (13) and a plurality of sinking grooves (63) corresponding to the positions of the explosion-proof liquid injection hole (12) are formed on the second plastic part (6), and a plurality of sinking grooves (63) are formed at the bottom of the sinking grooves (63).

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