CN219811577U - Terminal structure for cylindrical secondary battery and cylindrical secondary battery - Google Patents
Terminal structure for cylindrical secondary battery and cylindrical secondary battery Download PDFInfo
- Publication number
- CN219811577U CN219811577U CN202320471222.6U CN202320471222U CN219811577U CN 219811577 U CN219811577 U CN 219811577U CN 202320471222 U CN202320471222 U CN 202320471222U CN 219811577 U CN219811577 U CN 219811577U
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- Prior art keywords
- mounting hole
- secondary battery
- cylindrical secondary
- insulating sleeve
- pressing block
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 58
- 238000003825 pressing Methods 0.000 claims abstract description 51
- 239000000758 substrate Substances 0.000 claims abstract description 35
- 238000004804 winding Methods 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000004411 aluminium Substances 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a terminal structure for a cylindrical secondary battery and a cylindrical secondary battery. The terminal structure for a cylindrical secondary battery described above includes a current collecting tray, a substrate, a first insulating sleeve, a pressing block, and an aluminum rivet. The current collecting disc is used for being welded with a winding core of the cylindrical secondary battery; the first insulating sleeve is provided with a first mounting hole; the base plate is provided with a second mounting hole and is used for connecting the shell of the cylindrical secondary battery, and the base plate is fixedly connected with the first insulating sleeve; the pressing block is welded with the current collecting disc, the pressing block is connected with the base plate, and a third mounting hole is formed in the pressing block; the aluminum rivet penetrates through the first mounting hole, the second mounting hole and the third mounting hole respectively, is clamped in the first insulating sleeve and is riveted with the pressing block. Specifically, through above structure make the rivet need not with current collecting tray welding, again because aluminium rivet weight is lighter for the weight of negative pole apron is lighter, and then makes the cost of production lower.
Description
Technical Field
The present utility model relates to the field of cylindrical battery production, and more particularly, to a terminal structure for a cylindrical secondary battery and a cylindrical secondary battery.
Background
Cylindrical secondary batteries are widely used in various products because they can be charged and discharged secondarily and have a high capacity. The cylindrical battery generally comprises a shell and a battery cell accommodated in the shell, wherein cover plates are arranged at two ends of the shell, the battery cell in the shell is welded with a current collecting disc, and the current collecting disc is welded with the cover plates to realize the conduction function of the cylindrical battery.
For example, chinese patent application No. CN202221393848.1 discloses a negative electrode current collecting plate and a cylindrical battery, the negative electrode current collecting plate including a main body, a first bonding pad for bonding with a negative electrode of a battery cell, and a second bonding pad for bonding with a case of the battery. When the cylindrical battery is assembled, the cathode current collecting disc is arranged at one end of the shell, and the first bonding pad and the second bonding pad are respectively welded with the cathode of the battery cell and the shell. When the negative electrode current collecting disc and the shell are subjected to pressure along the axial direction of the cylindrical battery in the sealing process, the first elastic connecting part and the second elastic connecting part are forced to elastically deform to play a role of buffering, so that the pulling and extrusion of the first bonding pad and the second bonding pad are reduced, and the welding spots of the first bonding pad and the second bonding pad are effectively prevented from being damaged. Therefore, the negative electrode current collecting disc can obviously improve the yield of the cylindrical battery.
However, the structural design of the anode current collecting plate and the cylindrical battery in the above patent has the following problems in the use process:
the first bonding pad of the negative electrode current collecting disc is welded with the negative electrode column, the first bonding pad and the negative electrode column of the battery cell are generally riveted through rivets, and then laser welding is carried out on the riveting position, so that the conduction function is realized. However, because the rivet needs to be welded with the current collecting disc, the rivet made of copper is generally selected for welding with the current collecting disc, so that the weight of the cathode cover plate is larger, and the production cost is higher.
Therefore, there is a need for an improvement in the structural position of the rivet so that the anode cover plate is lighter in weight and lower in production cost.
Disclosure of Invention
The object of the present utility model is to overcome the disadvantages of the prior art and to provide a terminal structure for a cylindrical secondary battery and a cylindrical secondary battery, in which a rivet is not required to be welded to a current collecting plate, so that a negative electrode cap plate is light in weight and low in production cost.
The aim of the utility model is realized by the following technical scheme:
a terminal structure for a cylindrical secondary battery, comprising:
the current collecting disc is used for being welded with a winding core of the cylindrical secondary battery;
the terminal structure further comprises a terminal body, wherein the terminal body comprises a first insulating sleeve, a pressing block and an aluminum rivet, and the first insulating sleeve is provided with a first mounting hole;
the periphery of the base plate is used for being connected with the shell of the cylindrical secondary battery, and the first insulating sleeve is positioned in the second mounting hole and fixedly connected with the base plate;
the pressing block is positioned between the current collecting disc and the substrate, the pressing block is welded with the current collecting disc, the pressing block is connected to the substrate in an insulating manner, and a third mounting hole is formed in the pressing block;
the aluminum rivet penetrates through the first mounting hole, the second mounting hole and the third mounting hole respectively, the first insulating sleeve is sleeved on the aluminum rivet, and the end part of the aluminum rivet is riveted with the peripheral wall of the pressing block.
In one embodiment, the pressing block is further provided with a riveting groove, the riveting groove is communicated with the third mounting hole, and the end portion of the aluminum rivet is located in the riveting groove.
In one embodiment, the second mounting hole comprises a mounting hole body and an embedded groove which are communicated, the first insulating sleeve is located on the mounting hole body and fixedly connected with the substrate, the terminal structure further comprises a second insulating sleeve, the second insulating sleeve is connected to the pressing block, and the second insulating sleeve is located in the embedded groove and connected with the substrate.
In one embodiment, the second insulating sleeve comprises an insulating sleeve body and a boss protruding from the insulating sleeve body, the insulating sleeve body is connected to the substrate, the boss is embedded into the embedded groove, and two side surfaces of the boss are respectively connected with the substrate and the pressing block.
In one embodiment, the insulator sleeve body has a diameter greater than the collector plate.
In one embodiment, the terminal structure further comprises a sealing ring, wherein the sealing ring is located in the embedded groove, and the sealing ring is fixedly connected with the substrate.
In one embodiment, the sealing ring is provided with a fourth mounting hole, and the aluminum rivet penetrates through the fourth mounting hole.
In one embodiment, the pressure block is clamped between the collecting disc and the sealing ring.
In one embodiment, the aluminum rivet comprises a clamping piece and a riveting piece, wherein the clamping piece is fixedly connected with the riveting piece, the clamping piece is sleeved on the first insulating sleeve, and the riveting piece is riveted with the pressing block.
A cylindrical secondary battery comprising a case connected with the substrate, a winding core welded with the current collecting tray, and the terminal structure for a cylindrical secondary battery according to any of the embodiments.
Compared with the prior art, the utility model has at least the following advantages:
the terminal structure for the cylindrical secondary battery, the pressing block is welded with the collecting disc, the first mounting hole is formed in the first insulating sleeve, the second mounting hole is formed in the base plate, the third mounting hole is formed in the pressing block, the aluminum rivet is respectively arranged in the first mounting hole, the second mounting hole and the third mounting hole in a penetrating mode, the aluminum rivet is clamped on the first insulating sleeve, the periphery of the aluminum rivet is riveted with the peripheral wall of the pressing block, so that the aluminum rivet does not need to be welded with the collecting disc, and the weight of the negative electrode cover plate is light due to the fact that the aluminum rivet is light in material.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view showing a structure in which a terminal structure for a cylindrical secondary battery according to an embodiment is connected to a cylindrical secondary battery case;
fig. 2 is a structural sectional view showing a connection of the terminal structure for a cylindrical secondary battery shown in fig. 1 with a cylindrical secondary battery case;
fig. 3 is a schematic structural view of a terminal structure for a cylindrical secondary battery shown in fig. 1;
fig. 4 is a structural sectional view at A-A of the terminal structure for a cylindrical secondary battery shown in fig. 3;
fig. 5 is a structural sectional view of the terminal structure for a cylindrical secondary battery shown in fig. 3, which is connected with an aluminum rivet at A-A.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The utility model provides a terminal structure for a cylindrical secondary battery, which comprises a current collecting disc, a substrate and a terminal body. Wherein the current collecting disc is used for being welded with a winding core of the cylindrical secondary battery; the terminal body comprises a first insulating sleeve, a pressing block and an aluminum rivet, and the first insulating sleeve is provided with a first mounting hole; the periphery of the base plate is used for being connected with the shell of the cylindrical secondary battery, and the first insulating sleeve is positioned in the second mounting hole and fixedly connected with the base plate; the pressing block is positioned between the current collecting disc and the substrate, the pressing block is welded with the current collecting disc, the pressing block is connected to the substrate in an insulating manner, and a third mounting hole is formed in the pressing block; the aluminum rivet penetrates through the first mounting hole, the second mounting hole and the third mounting hole respectively, the aluminum rivet is sleeved on the first insulating sleeve, and the periphery of the aluminum rivet is riveted with the peripheral wall of the pressing block.
The terminal structure for the cylindrical secondary battery, the pressing block is welded with the collecting disc, the first mounting hole is formed in the first insulating sleeve, the second mounting hole is formed in the base plate, the third mounting hole is formed in the pressing block, the aluminum rivet is respectively arranged in the first mounting hole, the second mounting hole and the third mounting hole in a penetrating mode, the aluminum rivet is clamped on the first insulating sleeve in a riveting mode, the aluminum rivet is riveted with the pressing block, the aluminum rivet does not need to be welded with the collecting disc, the weight of the negative electrode cover plate is light due to the fact that the aluminum rivet is light, and therefore production cost is low.
In order to better understand the technical scheme and beneficial effects of the present utility model, the following describes the present utility model in further detail with reference to specific embodiments:
as shown in fig. 1 to 4, a terminal structure 10a for a cylindrical secondary battery of an embodiment includes a current collecting plate 100, a substrate 300, and a terminal body 20. The current collecting plate 100 is used for welding with a winding core 10c of the cylindrical secondary battery 10, the terminal body 20 comprises a first insulating sleeve 200, a pressing block 400 and an aluminum rivet 500, the first insulating sleeve 200 is provided with a first mounting hole 210, the base plate 300 is provided with a second mounting hole 310, the periphery of the base plate 300 is used for being connected with a shell 10b of the cylindrical secondary battery 10, and the base plate 300 is fixedly connected with the first insulating sleeve 200. The press block 400 is positioned between the current collecting plate 100 and the substrate 300, the press block 400 is welded with the current collecting plate 100, the press block 400 is connected to the substrate 300 in an insulating manner, so that no current passes between the press block and the substrate, and the press block 400 is provided with a third mounting hole 410. Further, the aluminum rivet 500 is respectively inserted into the first mounting hole 210, the second mounting hole 310 and the third mounting hole 410, the aluminum rivet 500 is engaged with the first insulating cover 200, and the periphery of the aluminum rivet 500 is riveted with the peripheral wall of the press block 400 so that the aluminum rivet 500 is abutted against the current collecting plate 100.
In this embodiment, the first insulating sleeve 200 is provided with the first mounting hole 210, the substrate 300 is provided with the second mounting hole 310, the pressing block 400 is provided with the third mounting hole 410, the aluminum rivet 500 sequentially penetrates through the first mounting hole 210, the second mounting hole 310 and the third mounting hole 410, the periphery of the end portion of the aluminum rivet 500 is riveted with the pressing block 400, the pressing block 400 is welded with the current collecting plate 100, and the end portion of the aluminum rivet 500 is abutted with the current collecting plate 100, so that the conduction function of the cylindrical secondary battery 10 is realized.
The terminal structure 10a for a cylindrical secondary battery described above, the press block 400 is welded with the current collecting plate 100, the first mounting hole 210 is provided in the first insulating sleeve 200, the second mounting hole 310 is provided in the base plate 300, the third mounting hole 410 is provided in the press block 400, and the aluminum rivet 500 is clamped on the first insulating sleeve 200 because the aluminum rivet 500 is respectively provided in the first mounting hole 210, the second mounting hole 310 and the third mounting hole 410, and the aluminum rivet 500 is riveted with the press block 400, so that the aluminum rivet 500 does not need to be welded with the current collecting plate 100, and the weight of the negative electrode cover plate is lighter because the aluminum rivet 500 is lighter, so that the production cost is lower.
As shown in fig. 2 and 4, in one embodiment, the press block 400 is further provided with a caulking groove 420, the caulking groove 420 communicates with the third installation hole 410, and an end of the aluminum rivet 500 is positioned in the caulking groove 420 so that the aluminum rivet 500 is caulking with the press block 400.
As shown in fig. 2 and 4, in one embodiment, the second mounting hole 310 includes a mounting hole body 311 and an embedded groove 312 that are in communication, the first insulating sleeve 200 is located in the mounting hole body 310 and is fixedly connected to the substrate 300, the terminal structure 10a further includes a second insulating sleeve 700, the second insulating sleeve 700 is connected to the press block 400, and the second insulating sleeve 700 is located in the embedded groove 312 and is connected to the substrate 300, so that no current passes between the press block 400 and the substrate 300. It will be appreciated that the second insulating sheath 700 is provided between the press 400 and the substrate 300, and the second insulating sheath 700 may allow no current to pass between the press 400 and the substrate 300, thereby preventing a short circuit of the battery.
As shown in fig. 2 and 4, in one embodiment, the second insulating sleeve 700 includes an insulating sleeve body 710 and a boss 720 protruding from the insulating sleeve body, the insulating sleeve body 710 is connected to the substrate 300, the boss 720 is embedded in the embedded groove 312, and two sides of the boss 720 are respectively connected to the substrate 300 and the pressing block 400, so that the second insulating sleeve 700 is embedded between the pressing block 400 and the substrate 300.
As shown in fig. 2, in one embodiment, the diameter of the insulating sleeve body 710 is greater than the diameter of the current collecting plate 100. It will be appreciated that the diameter of the insulating sleeve body 710 is greater than the diameter of the current collecting plate 100, further preventing current on the current collecting plate 100 from passing through the substrate.
As shown in fig. 2, in one embodiment, the terminal structure 10a further includes a seal ring 600, where the seal ring 600 is located in the embedded groove 312, and the seal ring 600 is fixedly connected to the substrate 300. It can be appreciated that the sealing ring 600 functions as a seal such that the electrolyte within the cylindrical secondary battery 10 cannot flow out from the substrate 300.
As shown in fig. 4 and 5, in one embodiment, the sealing ring 600 is provided with a fourth mounting hole 610, and the aluminum rivet 500 is inserted through the fourth mounting hole 610. It can be appreciated that the sealing ring 600 is located above the pressing block 400, and the sealing ring 600 is provided with a fourth mounting hole 610, so that the aluminum rivet 500 is inserted into the fourth mounting hole 610, and the aluminum rivet 500 can be riveted with the pressing block 400.
As shown in fig. 2, in one embodiment, a press block 400 is sandwiched between a current collecting plate 100 and a seal ring 600. It will be appreciated that one end of the press block 400 is welded to the current collecting plate 100, the other end is connected to the sealing ring 600, and the circumferential wall of the middle portion of the press block 400 is riveted with the aluminum rivet 500.
As shown in fig. 4 and 5, in one embodiment, the aluminum rivet 500 includes a clamping member 510 and a riveting member 520, the clamping member 510 is fixedly connected with the riveting member 520, the clamping member 510 is clamped in the first insulating sleeve 200, and the riveting member 520 is riveted with the pressing block 400. It can be understood that the aluminum rivet 500 has a T shape, the clamping member 510 is clamped to the first insulating sleeve 200, the riveting member 520 is respectively inserted into the first mounting hole 210, the second mounting hole 310 and the third mounting hole 410, and the periphery of the end of the riveting member 520 is riveted with the pressing block 400.
As shown in fig. 1 and 2, the present utility model also provides a cylindrical secondary battery 10 including a case 10b, a winding core 10c, and a terminal structure 10a for a cylindrical secondary battery according to any of the embodiments, the case 10b being connected to a substrate 300, the winding core 10c being welded to a current collecting tray 100.
Compared with the prior art, the utility model has at least the following advantages:
the terminal structure for the cylindrical secondary battery, the pressing block is welded with the collecting disc, the first mounting hole is formed in the first insulating sleeve, the second mounting hole is formed in the base plate, the third mounting hole is formed in the pressing block, the aluminum rivet is respectively arranged in the first mounting hole, the second mounting hole and the third mounting hole in a penetrating mode, the aluminum rivet is clamped on the first insulating sleeve in a riveting mode, the aluminum rivet is riveted with the pressing block, the aluminum rivet does not need to be welded with the collecting disc, the weight of the negative electrode cover plate is light due to the fact that the aluminum rivet is light, and therefore production cost is low.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A terminal structure for a cylindrical secondary battery includes a current collecting plate for welding with a winding core of the cylindrical secondary battery, and a base plate, characterized in that,
the terminal structure further comprises a terminal body, wherein the terminal body comprises a first insulating sleeve, a pressing block and an aluminum rivet, and the first insulating sleeve is provided with a first mounting hole;
the periphery of the base plate is used for being connected with the shell of the cylindrical secondary battery, and the first insulating sleeve is positioned in the second mounting hole and fixedly connected with the base plate;
the pressing block is positioned between the current collecting disc and the substrate, the pressing block is welded with the current collecting disc, the pressing block is connected to the substrate in an insulating manner, and a third mounting hole is formed in the pressing block;
the aluminum rivet penetrates through the first mounting hole, the second mounting hole and the third mounting hole respectively, the first insulating sleeve is sleeved on the aluminum rivet, and the end part of the aluminum rivet is riveted with the peripheral wall of the pressing block.
2. The terminal structure for a cylindrical secondary battery according to claim 1, wherein the pressing block is further provided with a caulking groove, the caulking groove communicates with the third mounting hole, and an end of the aluminum rivet is located in the caulking groove.
3. The terminal structure for a cylindrical secondary battery according to claim 1, wherein the second mounting hole includes a mounting hole body and an embedded groove which are communicated, the first insulating sleeve is located in the mounting hole body and fixedly connected with the substrate, the terminal structure further includes a second insulating sleeve connected to the pressing block, and the second insulating sleeve is located in the embedded groove and connected with the substrate.
4. The terminal structure for a cylindrical secondary battery according to claim 3, wherein the second insulating sleeve comprises an insulating sleeve body and a boss protruding from the insulating sleeve body, the insulating sleeve body is connected to the substrate, the boss is embedded in the embedded groove, and both sides of the boss are connected to the substrate and the pressing block, respectively.
5. The terminal structure for a cylindrical secondary battery according to claim 4, wherein the diameter of the insulating sleeve body is larger than the diameter of the current collecting tray.
6. The terminal structure for a cylindrical secondary battery according to claim 3, further comprising a sealing ring, the sealing ring being positioned in the embedded groove, the sealing ring being fixedly connected with the base plate.
7. The terminal structure for a cylindrical secondary battery according to claim 6, wherein the sealing ring is provided with a fourth mounting hole, and the aluminum rivet is inserted through the fourth mounting hole.
8. The terminal structure for a cylindrical secondary battery according to claim 6, wherein the pressing block is sandwiched between the current collecting plate and the sealing ring.
9. The terminal structure for a cylindrical secondary battery according to claim 1, wherein the aluminum rivet includes a clamping member fixedly connected with the caulking member, the clamping member is sleeved on the first insulating sleeve, and the caulking member is riveted with the pressing block.
10. A cylindrical secondary battery comprising a case connected to the base plate, a winding core welded to the current collecting tray, and the terminal structure for a cylindrical secondary battery according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320471222.6U CN219811577U (en) | 2023-03-03 | 2023-03-03 | Terminal structure for cylindrical secondary battery and cylindrical secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320471222.6U CN219811577U (en) | 2023-03-03 | 2023-03-03 | Terminal structure for cylindrical secondary battery and cylindrical secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219811577U true CN219811577U (en) | 2023-10-10 |
Family
ID=88209243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320471222.6U Active CN219811577U (en) | 2023-03-03 | 2023-03-03 | Terminal structure for cylindrical secondary battery and cylindrical secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219811577U (en) |
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2023
- 2023-03-03 CN CN202320471222.6U patent/CN219811577U/en active Active
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