CN220569789U - Cylindrical secondary battery, battery pack and vehicle - Google Patents
Cylindrical secondary battery, battery pack and vehicle Download PDFInfo
- Publication number
- CN220569789U CN220569789U CN202321875575.9U CN202321875575U CN220569789U CN 220569789 U CN220569789 U CN 220569789U CN 202321875575 U CN202321875575 U CN 202321875575U CN 220569789 U CN220569789 U CN 220569789U
- Authority
- CN
- China
- Prior art keywords
- pole
- shell
- secondary battery
- positive electrode
- welded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 16
- 239000003292 glue Substances 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to a cylindrical secondary battery, a battery pack and a vehicle, comprising a shell, a top cover, an anode confluence disc, a pole core and a cathode confluence disc; the positive electrode of the electrode core is welded with the positive electrode confluence disc; the negative electrode of the electrode core is welded with a negative electrode confluence disc; the pole core, the positive electrode confluence disc and the negative electrode confluence disc are arranged in the shell, and the negative electrode side of the pole core faces to the inside of the shell; the top end of the shell is open, the bottom is closed, and a liquid injection hole is formed in the bottom surface of the shell; the top cover comprises a cover plate, a pressing plate, a pole and an insulating piece; the cover plate is arranged above the positive electrode confluence disc, and the bottom surface of the pole is welded with the positive electrode confluence disc; the insulating piece is sleeved outside the pole, and the insulating piece is attached to the upper part and the middle part of the pole; the pressing plate is sleeved outside the insulating piece, presses the insulating piece and is welded with the cover plate; the cover plate is welded at the top opening of the shell. The utility model reduces the whole process, improves the yield and reduces the cost.
Description
Technical Field
The utility model relates to the technical field of cylindrical secondary batteries, in particular to a cylindrical secondary battery, a battery pack and a vehicle.
Background
The current cylindrical secondary battery is roughly classified into two types, one of which is a battery having a post at each end, and a positive electrode and a negative electrode at each end (for example, patent document CN 219163530U); the other is a pole at one end, and the shell is electrified to be used as the other pole with opposite polarity (such as patent document CN 219086100U), and the scheme is widely adopted because of the convenience of battery integration. Under normal conditions, the shell can be negatively charged, the shell is integrally stamped into a hollow thin-wall cylinder shape, a small round hole is formed in the top end for integrating the positive pole post, and the bottom is open and integrated with the bottom cover plate to form a sealing structure. In the scheme, the bottom cover plate and the shell are sealed through welding or roller groove edge pressing, the process is complex, the yield is improved, and small pressure is caused to the cost.
Therefore, it is necessary to develop a cylindrical secondary battery, a battery pack, and a vehicle.
Disclosure of Invention
The utility model aims to provide a cylindrical secondary battery, a battery pack and a vehicle, which can reduce the overall process, improve the yield and reduce the cost.
The utility model relates to a cylindrical secondary battery, which comprises a shell, a top cover, an anode confluence disc, a pole core and a cathode confluence disc, wherein the top cover is arranged on the shell; the positive electrode of the electrode core is welded with the positive electrode confluence disc; the negative electrode of the electrode core is welded with a negative electrode confluence disc; the pole core, the positive electrode confluence disc and the negative electrode confluence disc are arranged in the shell, and the negative electrode side of the pole core faces to the inside of the shell; the top end of the shell is open, the bottom is closed, and a liquid injection hole is formed in the bottom surface of the shell;
the top cover comprises a cover plate, a pressing plate, a pole and an insulating piece; the cover plate is arranged above the positive electrode confluence disc, and the bottom surface of the pole is welded with the positive electrode confluence disc; the insulating piece is sleeved outside the pole, and the insulating piece is attached to the upper part and the middle part of the pole; the pressing plate is sleeved outside the insulating piece, presses the insulating piece and is welded with the cover plate; the cover plate is welded at the top opening of the shell.
Optionally, the device further comprises a sealing gasket, wherein the sealing gasket is sleeved outside the pole, and the sealing gasket is attached to the lower part of the pole and the cover plate, and is compressed by the pressing plate to realize sealing; the utility model realizes the insulation of the pole and the cover plate through the sealing gasket.
Optionally, the lower insulating adhesive is adhered to the lower surface of the cover plate; the utility model realizes the insulation of the anode bus plate and the cover plate through the lower insulating adhesive.
Optionally, the pole is of a three-layer round table structure, the diameter of the middle part is larger than that of the upper part and the lower part, and a pit is arranged in the middle of the top surface of the pole; a thinned area is arranged between the upper surface of the upper part and the lower surface of the lower part, and the thinned area is welded with the positive electrode bus plate to ensure firm welding.
Optionally, a notch is further arranged on the bottom surface, and the notch plays a role of an explosion-proof valve.
Optionally, a circular groove is further formed in the bottom surface, and the groove is provided with a plane and two inclined planes; the nicks are positioned on the plane of the grooves; the liquid injection hole is positioned in the middle area surrounded by the groove.
Optionally, the negative electrode busbar disc comprises a main body part and an edge part positioned around the main body part; when the electrode core is welded with the positive electrode confluence disc and the negative electrode confluence disc and then is put into the shell, the edge part of the negative electrode confluence disc can be extruded and deformed and tightly contacts with the inner wall of the cylindrical surface of the shell, so that electric conduction is realized.
Optionally, the battery further comprises insulating glue, wherein the insulating glue is adhered to the top of the positive side of the pole core and covers the outer side of the positive bus plate, and the short circuit between the positive pole and the shell is avoided through the insulating glue.
In a second aspect, a battery pack according to the present utility model employs a cylindrical secondary battery according to the present utility model.
In a third aspect, the utility model provides a vehicle employing a battery pack according to the utility model.
The utility model has the beneficial effects that: according to the utility model, the top cover and the pole are integrated to be used as the top cover, the shell is designed to be of a structure with an open top and a closed bottom, and the shell is welded with the top cover. The cylindrical secondary battery has simple integral process, improves the yield and reduces the cost.
Drawings
FIG. 1 is an external schematic view in the present embodiment;
fig. 2 is a schematic structural view of the housing in the present embodiment;
FIG. 3 is a schematic bottom view of the housing in the present embodiment;
fig. 4 is a bottom sectional view of the case in the present embodiment;
FIG. 5 is a schematic view of the top cover in the present embodiment;
FIG. 6 is a cross-sectional view of a pole in the present embodiment;
fig. 7 is a sectional view of the upper part of the battery cell in the present embodiment;
fig. 8 is a schematic structural diagram of a negative electrode bus plate in the present embodiment;
fig. 9 is a lower cross-sectional view of the battery cell in the present embodiment;
in the figure: 1. the device comprises a shell, 11, a cylindrical surface, 12, a bottom surface, 121, scores, 122, a liquid injection hole, 123, grooves, 1231, a plane, 1232, an inclined surface, 2, a top cover, 21, a cover plate, 22, a pressing plate, 23, a pole post, 231, a lower part, 2311, a lower surface, 232, a middle part, 233, a lower part, 2331, an upper surface, 234, pits, 235, a thinned area, 24, a sealing gasket, 25, an insulating piece, 26, a lower insulating adhesive, 3, a positive electrode bus plate, 4, a pole core, 5, a negative electrode bus plate, 52, an edge part, 6 and insulating adhesive.
Detailed Description
Further advantages and effects of the present utility model will become readily apparent to those skilled in the art from the disclosure herein, by referring to the following description of the embodiments of the present utility model with reference to the accompanying drawings and preferred examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
As shown in fig. 1 to 9, in the present embodiment, a cylindrical secondary battery includes a case 1, a top cover 2, a positive electrode bus plate 3, a pole core 4, and a negative electrode bus plate 5; the positive electrode of the electrode core 4 is welded with the positive electrode confluence disc 3; the negative electrode of the pole core 4 is welded with a negative electrode bus plate 5; the pole core 4, the positive electrode confluence disc 3 and the negative electrode confluence disc 5 are arranged in the shell 1, and the negative electrode side of the pole core 4 faces into the shell 1.
As shown in fig. 2, 3 and 4, in the present embodiment, the housing 1 includes a cylindrical surface 11 and a bottom surface 12. The bottom 12 is provided with a notch 121, a filling hole 122 and a groove 123. The groove 123 is annular and is formed by stamping. The groove 123 includes a flat surface 1231 and two inclined surfaces 1232. Score 121 is located on a plane 1231 of groove 123. The filling hole 122 is located in a central region enclosed by the recess 123. Score 121 acts as an explosion proof valve.
As shown in fig. 5, 6 and 7, in the present embodiment, the top cover 2 includes a cover plate 21, a pressing plate 22, a pole 23, a gasket 24, an insulating member 25 and a lower insulating paste 26.
As shown in fig. 6, in the present embodiment, the pole 23 has a three-layer truncated cone structure, which is divided into a lower portion 231, a middle portion 232, and an upper portion 233, and the diameter of the middle portion 232 is larger than the diameters of the upper portion 233 and the lower portion 231. A pit 234 is formed in the center of the three-layer truncated cone structure, so that a thinned area 235 is formed between the upper surface 2331 of the upper portion 233 and the lower surface 2311 of the lower portion 231, and the thinned area 235 is welded with the positive electrode collector plate 3, so as to ensure reliable welding of the electrode post 23 and the positive electrode collector plate 3.
As shown in fig. 7, in this embodiment, the cover plate 21 is disposed above the positive electrode busbar 3, the insulating member 25 is sleeved outside the pole 23, and the insulating member 25 is attached to the upper portion 233 and the middle portion 232 of the pole 23. The pressing plate 22 is sleeved outside the insulating piece 25, and the pressing plate 22 presses the insulating piece 25 and is welded with the cover plate 21. The sealing gasket 24 is sleeved outside the pole 23, and the sealing gasket 24 is attached to the lower part 231 of the pole 23 and the cover plate 21, and is compressed by the pressing plate 22 to realize sealing. Insulation of the pole 23 from the cover plate 21 is achieved by an insulation 25. The lower insulating glue 26 is adhered to the lower surface of the cover plate 21, and insulation between the positive electrode bus plate 3 and the cover plate 21 is achieved through the lower insulating glue 26. The insulating glue 6 is adhered to the top of the positive electrode side of the electrode core 4 and covers the outer side of the positive electrode bus plate 3, so that the short circuit between the positive electrode and the shell is avoided.
As shown in fig. 7 and 9, in the present embodiment, the positive electrode bus plate 3 is welded to the positive electrode of the pole piece 4, and the negative electrode bus plate 5 is welded to the negative electrode of the pole piece 4.
As shown in fig. 8, in the present embodiment, the anode bus plate 5 is divided into a main body portion 51 and an edge portion 52, and the diameter of the edge portion 52 is larger than the diameter of the inner wall of the case 1. When the electrode core 4 is welded with the positive electrode confluence disc 3 and the negative electrode confluence disc 5 and then put into the shell, the edge part 52 of the negative electrode confluence disc 5 is extruded and deformed and tightly contacts with the inner wall of the cylindrical surface 11 of the shell 1, so that electric conduction is realized.
In this embodiment, the assembly process of the cylindrical secondary battery is as follows:
step 1: the positive electrode of the electrode core 4 is welded with the positive electrode bus plate 3 and is adhered with insulating glue 6;
step 2: the negative electrode of the pole core 4 is welded with a negative electrode confluence disc 5;
step 3: the pole piece 4 is inserted into the housing 1, wherein the negative side of the pole piece 4 faces into the housing 1;
step 4: welding a top cover 2;
step 5: the top cover 2 is welded with the anode bus plate 3 and the shell 1;
step 6: after the liquid injection and formation, the liquid injection hole 122 is sealed by welding the sealing nail.
In this embodiment, a battery pack employing a cylindrical secondary battery as described in this embodiment.
In this embodiment, a vehicle employs the battery pack as described in this embodiment.
The embodiments described above are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the embodiments described above, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the present utility model should be made in the equivalent manner, and are included in the scope of the present utility model.
Claims (10)
1. A cylindrical secondary battery comprises a shell (1), a top cover (2), a positive electrode confluence disc (3), a pole core (4) and a negative electrode confluence disc (5); the positive electrode of the electrode core (4) is welded with the positive electrode confluence disc (3); the negative electrode of the pole core (4) is welded with a negative electrode confluence disc (5); the pole core (4), the positive electrode confluence disc (3) and the negative electrode confluence disc (5) are arranged in the shell (1), and the negative electrode side of the pole core (4) faces into the shell (1); the method is characterized in that: the top end of the shell (1) is open, the bottom is closed, and a liquid injection hole (122) is formed in the bottom surface (12) of the shell (1);
the top cover (2) comprises a cover plate (21), a pressing plate (22), a pole (23) and an insulating piece (25); the cover plate (21) is arranged above the positive electrode confluence disc (3), and the bottom surface of the pole post (23) is welded with the positive electrode confluence disc (3); the insulating piece (25) is sleeved outside the pole (23), and the insulating piece (25) is attached to the upper part (233) and the middle part (232) of the pole (23) uniformly; the pressing plate (22) is sleeved outside the insulating piece (25), and the pressing plate (22) presses the insulating piece (25) and is welded with the cover plate (21); the cover plate (21) is welded at the top opening of the shell (1).
2. The cylindrical secondary battery according to claim 1, wherein: the sealing device further comprises a sealing gasket (24), the sealing gasket (24) is sleeved outside the pole (23), the sealing gasket (24) is attached to the lower portion (231) of the pole (23) and the cover plate (21) in a homogeneous mode, and the sealing gasket is compressed and sealed through the pressing plate (22).
3. The cylindrical secondary battery according to claim 1, wherein: the lower insulating adhesive (26) is adhered to the lower surface of the cover plate (21).
4. The cylindrical secondary battery according to claim 1, wherein: the pole (23) is of a three-layer round table structure, the diameter of the middle part (232) is larger than that of the upper part (233) and the lower part (231), and a pit (234) is formed in the middle of the top surface of the pole (23).
5. The cylindrical secondary battery according to claim 1, wherein: the bottom surface (12) is also provided with a notch (121).
6. The cylindrical secondary battery according to claim 5, wherein: the bottom surface (12) is also provided with a circular groove (123), and the groove (123) is provided with a plane (1231) and two inclined planes (1232); the nicks (121) are positioned on the plane (1231) of the grooves (123); the liquid injection hole (122) is positioned in the middle area surrounded by the groove (123).
7. The cylindrical secondary battery according to claim 3, wherein: the negative electrode busbar (5) comprises a main body (51) and edge parts (52) positioned around the main body (51).
8. The cylindrical secondary battery according to claim 1, wherein: the solar cell further comprises insulating glue (6), wherein the insulating glue (6) is adhered to the top of the positive side of the pole core (4) and covers the outer side of the positive bus plate (3).
9. A battery pack, characterized in that: a cylindrical secondary battery according to any one of claims 1 to 8.
10. A vehicle, characterized in that: use of a battery pack according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321875575.9U CN220569789U (en) | 2023-07-17 | 2023-07-17 | Cylindrical secondary battery, battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321875575.9U CN220569789U (en) | 2023-07-17 | 2023-07-17 | Cylindrical secondary battery, battery pack and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220569789U true CN220569789U (en) | 2024-03-08 |
Family
ID=90088674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321875575.9U Active CN220569789U (en) | 2023-07-17 | 2023-07-17 | Cylindrical secondary battery, battery pack and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220569789U (en) |
-
2023
- 2023-07-17 CN CN202321875575.9U patent/CN220569789U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216389535U (en) | Cylindrical lithium ion battery and battery module thereof | |
| CN114628866A (en) | High-energy-density cylindrical battery and assembly process thereof | |
| CN213026404U (en) | Power battery pole column assembly, power battery top cover and power battery | |
| CN109216596A (en) | A kind of battery | |
| CN216793840U (en) | Battery and battery pack | |
| CN210110855U (en) | Battery top cap and contain its battery | |
| CN208674180U (en) | A kind of battery | |
| CN215834573U (en) | Novel cylindrical lithium ion battery and battery module thereof | |
| CN220569789U (en) | Cylindrical secondary battery, battery pack and vehicle | |
| CN217387315U (en) | Battery structure subassembly, battery and electric vehicle | |
| CN216903151U (en) | Novel cylindrical battery and battery module | |
| CN116111242A (en) | Lithium battery steel shell assembly and lithium battery comprising same | |
| CN217361741U (en) | Punching press shell and cylinder battery | |
| CN219144424U (en) | Novel cylindrical battery structure | |
| CN214280083U (en) | Integrated cylindrical full-lug battery shell cover and battery with shell cover | |
| CN217903264U (en) | Cylindrical battery shell and cylindrical battery | |
| CN219717024U (en) | Cylindrical battery and battery pack comprising same | |
| CN219658936U (en) | Large cylindrical battery | |
| CN218997024U (en) | Novel terminal structure | |
| CN213071223U (en) | Button cell | |
| CN219371172U (en) | Cover plate and battery | |
| CN219513232U (en) | Cylindrical battery | |
| CN219371163U (en) | Lithium battery steel shell assembly and lithium battery comprising same | |
| CN219086102U (en) | Screw-thread sealed high-multiplying-power cylindrical battery | |
| CN216850107U (en) | Lithium battery top cover assembly and secondary battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |