CN217544766U - Connection structure and power battery of utmost point post and top cap - Google Patents
Connection structure and power battery of utmost point post and top cap Download PDFInfo
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- CN217544766U CN217544766U CN202221330561.4U CN202221330561U CN217544766U CN 217544766 U CN217544766 U CN 217544766U CN 202221330561 U CN202221330561 U CN 202221330561U CN 217544766 U CN217544766 U CN 217544766U
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Abstract
The utility model discloses a connecting structure of a pole and a top cover and a power battery, which comprises a top cover plate, an insulating part, a sealing ring, a top cover insulating bracket, the pole and a pole switching piece, wherein a first through hole is arranged at the center of the insulating part, a second through hole is arranged on the top cover plate, a third through hole is arranged on the top cover insulating bracket, the upper surface of the top cover insulating bracket is attached to the lower surface of the top cover plate, and the third through hole corresponds to the second through hole; the pole, the insulating part and the top cover plate are connected in an integrated injection molding manner; the insulating part is positioned in the second through hole, and the edge of the top part of the insulating part extends in the radial direction to form an insulating table supported on the upper surface of the top cover plate; the utmost point post is T shape, and the horizontal part of utmost point post is pressed on the top surface of insulating part, and the vertical portion of utmost point post passes first, second, third through-hole, and flushes with top cap insulating support's lower surface to with the upper surface welding of utmost point post switching piece. The utility model discloses can promote battery package Z to space utilization, improve assembly efficiency, make the assembly size precision of utmost point post change control simultaneously.
Description
Technical Field
The utility model belongs to the power battery field, concretely relates to connection structure and power battery of utmost point post and top cap.
Background
In the conventional power battery, a positive pole post and a negative pole post are respectively connected with a positive pole lug and a negative pole lug of a naked electric core in a shell, and electrolyte is injected into the shell; therefore, high requirements are put forward on the sealing performance and the structural reliability of the power battery. The connection mode of present utmost point post and top cap mainly has two kinds: firstly, a pole column is welded with a top cover plate, and the pole column is fastened on the top cover plate and isolated and insulated through an insulating part; and secondly, the pole column penetrates through the top cover plate and is pressed and riveted on the top cover plate, and the insulation is separated and insulated through an insulating part. No matter welding or press riveting connection is carried out, the pole, the insulating part and the top cover plate are welded or press riveted after being assembled according to positions, so that the pole protrudes out of the plane of the top cover plate by 3.2-5mm in the Z direction (namely the vertical direction), the height of the pole is relatively high, the space utilization rate of the battery pack in the Z direction is relatively low, the assembly efficiency is relatively low, and the assembly size precision of the pole is not easy to control.
Disclosure of Invention
The utility model aims at providing a connection structure and power battery of utmost point post and top cap to promote battery package Z to space utilization, improve assembly efficiency, make the assembly size precision of utmost point post change control simultaneously.
The utility model discloses a connection structure of a pole and a top cover, which comprises a top cover plate, an insulating piece, a sealing ring, a top cover insulating support, a pole and a pole switching piece, wherein a first through hole is formed in the center of the insulating piece, a second through hole is formed in the top cover plate, a third through hole is formed in the top cover insulating support, the upper surface of the top cover insulating support is attached to the lower surface of the top cover plate, and the third through hole corresponds to the second through hole; the pole, the insulating part and the top cover plate are connected in an integrated injection molding manner; the insulating part is positioned in the second through hole, the edge of the top of the insulating part extends radially to form an insulating table supported on the upper surface of the top cover plate, the bottom surface of the insulating part is higher than the bottom surface of the second through hole, and a sealing ring accommodating cavity is formed between the bottom surface of the insulating part and the bottom surface of the second through hole; utmost point post is T shape, and the horizontal part of utmost point post is pressed at the top surface of insulating part (can not with the contact of top cover board upper surface), and first through-hole, second through-hole, third through-hole are passed to the vertical portion of utmost point post, and the lower terminal surface of the vertical portion of utmost point post flushes with the lower surface of top cap insulating support, and the lower terminal surface of the vertical portion of utmost point post and the upper surface welding of utmost point post switching piece, and the sealing washer is compressed and is in the sealing washer holding intracavity.
Preferably, a plurality of first arc injection molding holes are formed in the edge of the second through hole of the top cover plate, and the plurality of first arc injection molding holes are evenly distributed along the circumferential direction of the second through hole at equal intervals. During injection molding, the material of the insulating part (namely, the injection molding material) can enter a plurality of first arc injection molding holes, so that the structural strength between the insulating part and the top cover plate is increased, and the insulating part is prevented from rotating relative to the top cover plate.
Preferably, the inner side wall of the insulating part is provided with bosses which are axially and symmetrically distributed, the outer side wall of the vertical part of the pole is provided with grooves which are axially and symmetrically distributed, and the bosses extend into the grooves to be matched with the grooves, so that the pole is prevented from rotating relative to the insulating part, and the Z-direction play of the pole is prevented.
The pole in the connection structure can be a positive pole or a negative pole. If the positive pole is the positive pole, the pole switching piece is correspondingly a positive pole switching piece, and the positive pole is of an integrally formed structure. If the negative pole post, then utmost point post switching piece corresponds to be negative pole post switching piece, and the negative pole post includes negative pole post body and negative pole post bottom plate, and the negative pole post body is T shape, and the upper surface of negative pole post bottom plate welds with the bottom surface of the vertical portion of negative pole post body, and the lower surface of negative pole post bottom plate and the upper surface welding of negative pole post switching piece, and flushes with the lower surface of top cap insulating support.
The utility model discloses another kind of connection structure of utmost point post and top cap, including lamina tecti, insulating part, sealing washer, top cap insulating support, utmost point post and utmost point post switching piece, the first through-hole has been seted up at the center of insulating part, has seted up the second through-hole on the lamina tecti, has seted up the third through-hole on the top cap insulating support, the upper surface of lamina tecti insulating support and the lower surface laminating of lamina tecti, the third through-hole corresponds with the second through-hole; the connecting structure also comprises a top cover plate adapter, wherein a fourth through hole corresponding to the second through hole is formed in the center of the top cover plate adapter, and a positioning groove for accommodating the top cover plate adapter is formed in the edge of the second through hole of the top cover plate; the pole, the insulating part and the top cover plate adapter part are integrally connected in an injection molding manner, and the top cover plate adapter part is positioned in the positioning groove and welded with the top cover plate; the insulating part is positioned in the fourth through hole and the second through hole, the edge of the top of the insulating part extends radially to form an insulating table supported on the upper surface of the adapter of the top cover plate, the bottom surface of the insulating part is higher than the bottom surface of the second through hole, and a sealing ring accommodating cavity is formed between the bottom surface of the insulating part and the bottom surface of the second through hole; utmost point post is T shape, and the horizontal part of utmost point post is pressed at the top surface of insulating part (can not with top cap board adaptor upper surface contact), and first through-hole, second through-hole, third through-hole are passed to the vertical portion of utmost point post, and the lower terminal surface of the vertical portion of utmost point post flushes with top cap insulating support's lower surface, and the lower terminal surface of the vertical portion of utmost point post and the upper surface welding of utmost point post switching piece, and the sealing washer is compressed and is in the sealing washer holding intracavity. This kind of connection structure moulds plastics with utmost point post, insulating part and the integrative connection of moulding plastics of lamina tecti adaptor, and it is more convenient to mould plastics, but need place lamina tecti adaptor in the constant head tank and with lamina tecti welding after moulding plastics.
Preferably, a plurality of second arc injection molding holes are formed in the edge of a fourth through hole of the top cover plate adapter, and the plurality of second arc injection molding holes are evenly distributed along the circumference of the fourth through hole at equal intervals. During injection molding, the material (namely, injection molding material) of the insulating part can enter the second arc injection molding holes, so that the structural strength between the insulating part and the top cover plate adapter is improved, and the insulating part is prevented from rotating relative to the top cover plate adapter.
The inside wall of insulating part is provided with the boss of axial symmetry distribution, the recess of axial symmetry distribution is seted up to the lateral wall of the vertical portion of utmost point post, and the boss stretches into in the recess and the groove fit, has both prevented the relative insulating part of utmost point post and has rotated, has prevented the Z of utmost point post again to the drunkenness.
The pole in the connection structure can be a positive pole or a negative pole. If the positive pole is the positive pole, the pole switching piece is correspondingly a positive pole switching piece, and the positive pole is of an integrally formed structure. If the negative pole post, then utmost point post switching piece corresponds to be negative pole post switching piece, and the negative pole post includes negative pole post body and negative pole post bottom plate, and the negative pole post body is T shape, and the upper surface of negative pole post bottom plate welds with the bottom surface of the vertical portion of negative pole post body, and the lower surface of negative pole post bottom plate and the upper surface welding of negative pole post switching piece, and flushes with the lower surface of top cap insulating support.
Power battery, connection structure including above-mentioned utmost point post and top cap.
The utility model discloses has following effect:
(1) The upper surface of the top cover plate protrudes out of the horizontal part of only part of the insulating part and the pole, and the Z-direction protruding height of the pole is reduced to be less than 3mm, so that the Z-direction space utilization rate of the battery pack is improved.
(2) Directly mould plastics as an organic whole with utmost point post, insulating part, lamina tecti (or lamina tecti adaptor) three, improved assembly efficiency, make the assembly size precision of utmost point post change the control simultaneously.
Drawings
Fig. 1 is an exploded view of the pole, the insulating member, the top cover plate and the gasket in example 1.
FIG. 2 is a sectional view of example 1.
Fig. 3 is an exploded view of the pole, the insulating member, the top cover plate and the gasket in example 2.
FIG. 4 is a sectional view of embodiment 2.
Fig. 5 is an exploded view of the terminal post, the insulating member, the top cover plate and the gasket of example 3.
Detailed Description
Example 1: the connection structure of the pole and the top cover as shown in fig. 1 and fig. 2 comprises a top cover plate 1, an insulating part 2, a sealing ring 3, a top cover insulating support 4, a pole and a pole adapter sheet, wherein the pole is a positive pole 5, and the pole adapter sheet is a positive pole adapter sheet 6. First through-hole 21 has been seted up at the center of insulating part 2, the inside wall of insulating part 2 is provided with two bosss 22 of axial symmetric distribution, second through-hole 11 has been seted up on lamina tecti 1, four first arcs have been seted up at the edge of lamina tecti 1's second through-hole 11 and have been moulded plastics hole 12, four first arcs are moulded plastics hole 12 and are followed the equidistant evenly distributed of circumference of second through-hole 11, the third through-hole has been seted up on top cap insulating support 4, the upper surface of top cap insulating support 4 and the laminating of lamina tecti 1's lower surface, the third through-hole corresponds with second through-hole 11, the diameter of third through-hole is less than the diameter of second through-hole 11. Anodal post 5, insulating part 2 and 1 an organic whole injection moulding of lamina tecti are connected, and insulating part 2 is located second through-hole 11 and top edge radially extends, forms the insulating platform that supports at the lamina tecti upper surface, and the bottom surface of insulating part 2 is higher than the bottom surface of second through-hole 11, forms sealing washer holding chamber between the bottom surface of insulating part 2 and the bottom surface of second through-hole 11. Anodal post 5 is T shape, two recesses 51 that axial symmetric distributed are seted up to the lateral wall of the vertical portion of anodal post 5, the horizontal part pressure of anodal post 5 is at the top surface of insulating part 2 (can not with the contact of top cap board upper surface), two bosss 22 stretch into respectively in two recesses 51, with two recesses 51 cooperations, first through-hole 21 is passed to the vertical portion of anodal post 5, second through-hole 11, the third through-hole, the lower terminal surface of the vertical portion of anodal post 5 flushes with the lower surface of top cap insulating support 4, the lower terminal surface of the vertical portion of anodal post 5 and the upper surface welding of anodal post switching piece 6, anodal post switching piece 6 promotes top cap insulating support 4 compression sealing washer 3, make sealing washer 3 compressed in the sealing washer holding intracavity, sealing washer 3 is by the bottom surface of insulating part 2, the inside wall of second through-hole 11, the upper surface of top cap insulating support 4 and the lateral wall of anodal post 5 are around sealing well, reach the sealed purpose of utmost point post assembly structure well. The height of the insulating part 2 is 0.5 to 1.0mm higher than the upper surface of the top cover plate, the height of the top surface of the positive post 5 is 1.0 to 2.0mm higher than that of the insulating part 2, and the size range of the positive post 5 protruding out of the top cover plate is 1.5 to 3mm.
The embodiment also provides a power battery, which comprises the connecting structure of the pole and the top cover.
Example 2: like the connection structure of utmost point post and top cap shown in fig. 3, fig. 4, including lamina tecti 1, insulating part 2, sealing washer 3, top cap insulating support 4, utmost point post and utmost point post switching piece, utmost point post is the negative pole post, and utmost point post switching piece is negative pole post switching piece 9, and the negative pole post includes negative pole post body 7 and negative pole post bottom plate 8, and negative pole post body 7 is the T shape, and the upper surface of negative pole post bottom plate 8 welds with the bottom surface of the vertical portion of negative pole post body 7. First through-hole 21 has been seted up at the center of insulating part 2, the inside wall of insulating part 2 is provided with two bosss 22 of axial symmetric distribution, second through-hole 11 has been seted up on the lamina tecti 1, four first arcs have been seted up at the edge of the second through-hole 11 of lamina tecti 1 and have been moulded plastics hole 12, four first arcs are moulded plastics hole 12 along the equidistant evenly distributed of circumference of second through-hole 11, the third through-hole has been seted up on top cap insulating support 4, the upper surface of top cap insulating support 4 and the laminating of the lower surface of lamina tecti 1, the third through-hole corresponds with second through-hole 11, the diameter of third through-hole is less than the diameter of second through-hole 11. Negative pole post body 7, negative pole post bottom plate 8, insulator 2 and 1 an organic whole of lamina tecti are moulded plastics and are connected, and insulator 2 is located second through-hole 11 and top edge radially extends, forms the insulating stand that supports at the lamina tecti upper surface, and the bottom surface of insulator 2 is higher than the bottom surface of second through-hole 11, forms sealing washer holding chamber between the bottom surface of insulator 2 and the bottom surface of second through-hole 11. Two grooves 71 that axial symmetric distributed are seted up to the lateral wall of the vertical portion of negative pole post body 7, the horizontal part pressure of negative pole post body 7 is at the top surface of insulating part 2 (can not with top apron adaptor surface contact), two bosss 22 stretch into in two grooves 71 respectively, with two groove 71 cooperations, the vertical portion of negative pole post body 7 passes first through-hole 21, second through-hole 11, the third through-hole, the lower terminal surface of the vertical portion of negative pole post body 7 flushes with the bottom surface of insulating part 2, the lower surface of negative pole post bottom plate 8 flushes with the lower surface of top cap insulating support 4, the lower surface of negative pole post bottom plate 8 and the last surface weld of negative pole post adaptor piece 9, negative pole post adaptor piece 9 promotes top cap insulating support 4 compression sealing washer 3, make sealing washer 3 compressed in sealing washer holding intracavity, sealing washer 3 is by the bottom surface of insulating part 2, the inside wall of second through-hole 11, the upper surface of top cap insulating support 4 and the lateral wall four sides of negative pole post bottom plate 8 are around sealing, reach the sealed purpose to the negative pole post assembly structure. The insulating part 2 is 0.5 to 1.0mm higher than the upper surface of the top cover plate, the top surface of the negative pole column body 7 is 1.0 to 2.0mm higher than the top surface of the insulating part 2, and the size range of the negative pole column body 7 protruding out of the top cover plate is 1.5 to 3mm.
The embodiment also provides a power battery, which comprises the connecting structure of the pole and the top cover.
Example 3: as shown in fig. 5, most of the structure of the connection structure between the post and the top cover in this embodiment is the same as that in embodiment 1, except that: still include top apron adaptor 10, the fourth through-hole 14 that corresponds with second through-hole 11 has been seted up at the center of top apron adaptor 10, and four second arc injection molding holes 15 have been seted up at the edge of fourth through-hole 14 of top apron adaptor 10, and four second arc injection molding holes 15 are along the equidistant evenly distributed of circumference of fourth through-hole 14, and the constant head tank 13 that holds top apron adaptor 10 has been seted up at the edge of the second through-hole 11 of top apron 1. Anodal post 5, insulating part 2 and the integrative connection of moulding plastics of top apron adaptor 10, top apron adaptor 10 is located constant head tank 13 and welds with top apron 1. The insulating member 2 is positioned in the fourth through hole 14 and the second through hole 11, and the top edge extends radially to form an insulating stand supported on the upper surface of the top cover plate adapter.
The embodiment also provides a power battery, which comprises the connecting structure of the pole and the top cover.
Example 4: the connection structure of utmost point post and top cap in this embodiment, its most structure is the same with embodiment 2, the difference lies in: the top cover plate adapter is further included, a fourth through hole corresponding to the second through hole is formed in the center of the top cover plate adapter, four second arc injection molding holes are formed in the edge of the fourth through hole of the top cover plate adapter, the four second arc injection molding holes are evenly distributed along the circumference of the fourth through hole at equal intervals, and a positioning groove for containing the top cover plate adapter is formed in the edge of the second through hole of the top cover plate. The cathode column body, the cathode column bottom plate, the insulating part and the top cover plate adapter are connected in an integrated injection molding mode, and the top cover plate adapter is located in the positioning groove and welded with the top cover plate. The insulating part is positioned in the fourth through hole and the second through hole, and the edge of the top part of the insulating part extends in the radial direction to form an insulating table supported on the upper surface of the top cover plate adapter part.
The embodiment also provides a power battery, which comprises the connecting structure of the pole and the top cover.
Claims (10)
1. A connecting structure of a pole and a top cover comprises a top cover plate (1), an insulating piece (2), a sealing ring (3), a top cover insulating support (4), the pole and a pole adapter piece, wherein a first through hole (21) is formed in the center of the insulating piece (2), a second through hole (11) is formed in the top cover plate (1), a third through hole is formed in the top cover insulating support (4), the upper surface of the top cover insulating support (4) is attached to the lower surface of the top cover plate (1), and the third through hole corresponds to the second through hole (11); the method is characterized in that: the pole, the insulating part (2) and the top cover plate (1) are connected in an integrated injection molding manner; the insulating part (2) is positioned in the second through hole (11), the edge of the top of the insulating part radially extends to form an insulating table supported on the upper surface of the top cover plate, the bottom surface of the insulating part (2) is higher than that of the second through hole (11), and a sealing ring accommodating cavity is formed between the bottom surface of the insulating part (2) and the bottom surface of the second through hole (11); utmost point post is T shape, and the horizontal part of utmost point post is pressed at the top surface of insulating part (2), and the vertical portion of utmost point post passes first through-hole (21), second through-hole (11), third through-hole, and the lower terminal surface flushes with the lower surface of top cap insulating support (4) to with the upper surface welding of utmost point post switching piece, sealing washer (3) are compressed sealing washer holding intracavity.
2. The connection structure of the pole column and the top cover according to claim 1, characterized in that:
a plurality of first arc injection molding holes (12) are formed in the edge of a second through hole (11) of the top cover plate (1), and the plurality of first arc injection molding holes (12) are evenly distributed along the circumferential direction of the second through hole (11) at equal intervals.
3. The connection structure of the pole and the top cover according to claim 2, wherein:
the inside wall of insulating part (2) is provided with boss (22) that axial symmetry distributes, the recess that axial symmetry distributes is seted up to the lateral wall of the vertical portion of utmost point post, and boss (22) stretch into in the recess and the recess cooperation.
4. The connection structure of the pole and the top cover according to any one of claims 1 to 3, characterized in that: the post is a positive post (5), and the post switching sheet is a positive post switching sheet (6).
5. The connection structure of the pole and the top cover according to any one of claims 1 to 3, characterized in that: the utmost point post is the negative pole post, utmost point post switching piece is negative pole post switching piece (9), and the negative pole post includes negative pole post body (7) and negative pole post bottom plate (8), and negative pole post body (7) are T shape, and the upper surface of negative pole post bottom plate (8) welds with the bottom surface of the vertical portion of negative pole post body (7), and the lower surface of negative pole post bottom plate (8) welds with the upper surface of negative pole post switching piece (9), and flushes with the lower surface of top cap insulating support (4).
6. A connecting structure of a pole and a top cover comprises a top cover plate (1), an insulating part (2), a sealing ring (3), a top cover insulating support, the pole and a pole adapter plate, wherein a first through hole (21) is formed in the center of the insulating part (2), a second through hole (11) is formed in the top cover plate (1), a third through hole is formed in the top cover insulating support, the upper surface of the top cover insulating support is attached to the lower surface of the top cover plate (1), and the third through hole corresponds to the second through hole (11); the method is characterized in that: the top cover plate adapter (10) is further included, a fourth through hole (14) corresponding to the second through hole (11) is formed in the center of the top cover plate adapter (10), and a positioning groove (13) for containing the top cover plate adapter (10) is formed in the edge of the second through hole (11) of the top cover plate (1); the pole, the insulating part (2) and the top cover plate adapter part (10) are connected in an integrated injection molding mode, and the top cover plate adapter part (10) is located in the positioning groove (13) and welded with the top cover plate (1); the insulating part (2) is positioned in the fourth through hole (14) and the second through hole (11), the edge of the top of the insulating part radially extends to form an insulating table supported on the upper surface of the top cover plate adapter part, the bottom surface of the insulating part (2) is higher than that of the second through hole (11), and a sealing ring accommodating cavity is formed between the bottom surface of the insulating part (2) and the bottom surface of the second through hole (11); utmost point post is T shape, and the horizontal part pressure of utmost point post is at the top surface of insulating part (2), and the vertical portion of utmost point post passes first through-hole (21), second through-hole (11), third through-hole, and the lower terminal surface flushes with top cap insulating support's lower surface to with the upper surface welding of utmost point post switching piece, sealing washer (3) are compressed sealing washer holding intracavity.
7. The connection structure of the pole column and the top cover according to claim 6, characterized in that:
a plurality of second arc-shaped injection molding holes (15) are formed in the edge of a fourth through hole (14) of the top cover plate adapter piece (10), and the second arc-shaped injection molding holes (15) are uniformly distributed at equal intervals along the circumferential direction of the fourth through hole (14);
the inside wall of insulating part (2) is provided with the boss of axial symmetry distribution, the recess of axial symmetry distribution is seted up to the lateral wall of the vertical portion of utmost point post, and the boss stretches into in the recess and cooperates with the recess.
8. The connection structure of a pole column and a top cover according to claim 6 or 7, characterized in that: the post is a positive post (5), and the post switching sheet is a positive post switching sheet.
9. The connection structure of the post and the top cover according to claim 6 or 7, characterized in that: the utmost point post is the negative pole post, utmost point post switching piece is negative pole post switching piece, and the negative pole post includes negative pole post body and negative pole post bottom plate, and the negative pole post body is T shape, and the upper surface of negative pole post bottom plate and the bottom surface welding of the vertical portion of negative pole post body, the lower surface of negative pole post bottom plate and the upper surface welding of negative pole post switching piece, and flush with the lower surface of top cap insulating support.
10. A power battery, characterized by: the connecting structure of the pole and the top cover comprises the pole according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221330561.4U CN217544766U (en) | 2022-05-31 | 2022-05-31 | Connection structure and power battery of utmost point post and top cap |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221330561.4U CN217544766U (en) | 2022-05-31 | 2022-05-31 | Connection structure and power battery of utmost point post and top cap |
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| CN217544766U true CN217544766U (en) | 2022-10-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116111245A (en) * | 2023-02-17 | 2023-05-12 | 厦门海辰储能科技股份有限公司 | End cover assembly, energy storage device and electric equipment |
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2022
- 2022-05-31 CN CN202221330561.4U patent/CN217544766U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116111245A (en) * | 2023-02-17 | 2023-05-12 | 厦门海辰储能科技股份有限公司 | End cover assembly, energy storage device and electric equipment |
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Address after: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee after: Deep Blue Automotive Technology Co.,Ltd. Address before: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee before: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |