CN220358203U - Battery cell - Google Patents
Battery cell Download PDFInfo
- Publication number
- CN220358203U CN220358203U CN202321833395.4U CN202321833395U CN220358203U CN 220358203 U CN220358203 U CN 220358203U CN 202321833395 U CN202321833395 U CN 202321833395U CN 220358203 U CN220358203 U CN 220358203U
- Authority
- CN
- China
- Prior art keywords
- steel
- current collecting
- battery
- bottom steel
- steel shell
- 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
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 139
- 239000010959 steel Substances 0.000 claims abstract description 139
- 238000004804 winding Methods 0.000 claims abstract description 19
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000008719 thickening Effects 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000007747 plating Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 238000003466 welding Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a battery, which has a steel shell and a bottom steel cover coating which are not damaged so as to avoid corrosion. The battery provided by the utility model comprises a steel shell, a winding core, a bottom steel cover and a negative electrode current collecting disc, wherein the winding core is arranged in the steel shell, one end of the steel shell is in open arrangement, the other end of the steel shell is in closed arrangement, two ends of the winding core respectively form a positive electrode lug and a negative electrode lug, the negative electrode current collecting disc and the bottom steel cover are arranged at the open end of the steel shell, the negative electrode current collecting disc is arranged between the negative electrode lug and the bottom steel cover, the negative electrode current collecting disc is welded to the negative electrode lug, the peripheral edges of the negative electrode current collecting disc are thickened to form a connecting structure, and the connecting structure is respectively combined with the bottom steel cover and the steel shell in a laser melting mode, so that the bottom steel cover seals the open end of the steel shell.
Description
Technical Field
The utility model relates to the field of batteries, in particular to a battery.
Background
The existing cylindrical battery comprises a steel shell, a winding core, a bottom steel cover, a pole column, an anode current collecting disc and a cathode current collecting disc, wherein an anode tab and a cathode tab are respectively formed at two ends of the winding core, and are of a full tab structure and are formed by kneading and flattening. One end of the steel shell of the battery is closed, the other end of the steel shell is open, the bottom steel cover is arranged at the open end and used as a negative electrode, and the pole is arranged at the closed end and used as a positive electrode. When the device is installed, the winding core is installed in the steel shell, the negative electrode current collecting disc is installed, the negative electrode current collecting disc is welded to the negative electrode lug in a laser welding mode, then the bottom steel cover is installed, the bottom steel cover is welded to the negative electrode current collecting disc in a laser welding mode, and finally the edge of the bottom steel cover is welded to the steel shell in a laser welding mode, so that sealing is achieved. During welding, laser is directly applied to the surfaces of the steel shell and the bottom steel cover, so that the surface coating (usually a nickel layer) of the steel shell is completely damaged, and the steel shell and the bottom steel cover which are lack of coating protection are easy to rust.
Accordingly, there is a need to provide a battery that avoids corrosion without damaging the steel can and bottom steel cover surface plating to overcome the above-mentioned drawbacks.
Disclosure of Invention
The utility model aims to provide a battery which is free from damage to the surface plating layers of a steel shell and a bottom steel cover and can avoid corrosion.
In order to achieve the above purpose, the utility model provides a battery, which comprises a steel shell, a winding core, a bottom steel cover and a negative electrode current collecting disc, wherein the winding core is arranged in the steel shell, one end of the steel shell is in open arrangement, the other end of the steel shell is in closed arrangement, two ends of the winding core respectively form a positive electrode lug and a negative electrode lug, the negative electrode current collecting disc and the bottom steel cover are arranged at the open end of the steel shell, the negative electrode current collecting disc is arranged between the negative electrode lug and the bottom steel cover, the negative electrode current collecting disc is welded to the negative electrode lug, the peripheral edges of the negative electrode current collecting disc are thickened to form a connecting structure, and the connecting structure is respectively combined with the bottom steel cover and the steel shell in a laser melting mode, so that the bottom steel cover seals the open end of the steel shell.
Preferably, the connection structure is a triangular structure, and the triangular structure is continuously thickened along the radial direction of the anode current collecting disc.
Preferably, the connection structure circumferentially surrounds the bottom steel cover.
Preferably, the connection structure circumferentially surrounds the open end of the steel shell.
Preferably, the periphery of the bottom steel cover is provided with a first bevel angle structure, the connecting structure is provided with a second bevel angle structure, the connecting structure is provided with a containing space for containing the bottom steel cover, the bottom steel cover is arranged in the containing space, and the first bevel angle structure is in fit connection with the second bevel angle structure.
Preferably, the edge of the opening end of the steel shell is provided with a third bevel structure, the connecting structure is provided with a fourth bevel structure, and the third bevel structure is in fit and butt joint with the fourth bevel structure.
Preferably, the connection structure is a T-shaped structure.
Preferably, the outer side surface of the connecting structure is flush with the outer side surface of the steel shell.
Preferably, the middle part of bottom steel lid has been seted up annotates the liquid hole, and first liquid flow hole has been seted up at the middle part of negative pole mass flow disc, and the second liquid flow hole has been seted up at the middle part of rolling up the core, annotates liquid hole, first liquid flow hole and second liquid flow hole three each other just to the intercommunication, annotates the liquid hole and seals through sealed nickel piece.
Preferably, the battery further comprises a pole and an anode current collecting disc, the closing end of the steel shell is provided with a mounting hole, the anode current collecting disc is mounted in the steel shell and welded on the anode lug, the pole is mounted in the mounting hole and is electrically connected with the anode current collecting disc, a first insulating piece is mounted between the anode current collecting disc and the steel shell, and a second insulating piece is mounted between the pole and the steel shell.
Compared with the prior art, the utility model adopts a laser melting mode to enable the connecting structure to be respectively combined with the bottom steel cover and the steel shell, laser is directly beaten on the connecting structure to enable the connecting structure to be melted, and the connecting structure can be tightly connected and combined with the bottom steel cover and the steel shell after cooling, so that reliable sealing is realized. Because laser is not directly beaten on the surface of the steel shell or the surface of the bottom steel cover, damage to the surface plating layer of the steel shell or the surface plating layer of the bottom steel cover is avoided, and corrosion caused by the damage of the plating layer on the surface of the steel shell or the surface of the bottom steel cover is avoided.
Drawings
Fig. 1 is a cross-sectional view of a battery of the present utility model.
Fig. 2 is a cross-sectional view of the battery shown in fig. 1 after disassembly of the anode current collecting disk and bottom steel cover.
Fig. 3 is a structural cross-sectional view of a negative current collecting plate according to another embodiment of the present utility model.
Detailed Description
In order to describe the technical content and constructional features of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
As shown in fig. 1 and 2, the present utility model provides a battery 100, which battery 100 includes a steel can 10, a winding core 20, a bottom steel cap 30, and a negative current collecting plate 40. The winding core 20 is installed in the steel shell 10, one end of the steel shell 10 is arranged in an open mode, the other end of the steel shell 10 is arranged in a closed mode, and the winding core 20 is installed in the steel shell 10 from the open end of the steel shell 10. The positive electrode tab 21 and the negative electrode tab 22 are formed at both ends of the winding core 20, respectively, and the negative electrode current collecting plate 40 and the bottom steel cover 30 are provided at the open end of the steel can 10. The negative electrode current collecting plate 40 is arranged between the negative electrode tab 22 and the bottom steel cover 30, and the negative electrode current collecting plate 40 is welded to the negative electrode tab 22. Specifically, the anode current collecting plate 40 is welded to the anode tab 22 by means of laser multi-point welding, so that the contact between the anode tab 22 and the anode current collecting plate 40 is good, the internal resistance is effectively reduced, and the effect of low internal resistance conduction is achieved.
The edges of the periphery of the anode current collecting disc 40 are thickened to form a connecting structure 41, and the connecting structure 41 is respectively combined with the bottom steel cover 30 and the steel shell 10 in a laser melting mode, so that the bottom steel cover 30 seals the open end of the steel shell 10. The utility model adopts a laser melting mode to combine the connecting structure 41 with the bottom steel cover 30 and the steel shell 10 respectively, the laser is directly beaten on the connecting structure 41 to melt the connecting structure 41, and the connecting structure 41 can be tightly connected and combined with the bottom steel cover 30 and the steel shell 10 after cooling, so that reliable sealing is realized. Since the laser is not directly applied to the surface of the steel shell 10 or the surface of the bottom steel cover 30, damage to the surface plating layer of the steel shell 10 or the surface plating layer of the bottom steel cover 30 is not caused, and corrosion of the surface of the steel shell 10 or the surface of the bottom steel cover 30 due to the damage of the plating layer is avoided. It can be understood that the connection structure 41 is combined with the bottom steel cover 30 after being melted, so that the connection structure 41 is more tightly combined with the bottom steel cover 30, has good contact property and small internal resistance, and is beneficial to realizing low internal resistance conduction. The anode current collecting plate 40 is preferably a nickel plate, but a copper-nickel plate or the like may be used.
The winding core 20 is formed by stacking or winding a positive plate, a negative plate and a diaphragm, the positive electrode tab 21 and the negative electrode tab 22 are obtained by rubbing two ends of the winding core 20, and the structure of the winding core 20 is well known to those skilled in the art, so that the description is omitted herein. The bottom steel cap 30 serves as the negative electrode of the battery 100. The battery 100 provided by the utility model is a cylindrical battery, and correspondingly, the steel shell 10 is of a cylindrical structure.
As shown in fig. 1 and 2, in the embodiment provided by the present utility model, the connection structure 41 is a triangular structure, the triangular structure is continuously thickened along the radial direction of the anode current collecting disc 40, and when laser is applied to the connection structure 41, the connection structure 41 is sufficiently melted, so that the connection structure 41 is better combined with the bottom steel cover 30 and the steel shell 10. Specifically, the connection structure 41 is circumferentially arranged around the bottom steel cover 30, and the connection structure 41 is bonded to the edge of the bottom steel cover 30 around the connection structure, so that the bonding area is large and the conductivity is improved. The connection structure 41 circumferentially surrounds the open end of the steel can 10, and the connection structure 41 is combined with the open end of the steel can 10 everywhere, so that the combination area is large and the combination strength is high.
Further, the periphery of the bottom steel cover 30 is provided with a first bevel structure 31, the connecting structure 41 is formed with a second bevel structure 42, the connecting structure 41 is formed with a containing space 43 for containing the bottom steel cover 30, the bottom steel cover 30 is arranged in the containing space 43, and the first bevel structure 31 is in fit connection with the second bevel structure 42, so that the contact area between the connecting structure 41 and the bottom steel cover 30 is increased, and stable combination is facilitated. The edge of the open end of the steel shell 10 is provided with a third bevel structure 11, the connecting structure 41 is provided with a fourth bevel structure 44, and the third bevel structure 11 is jointed with the fourth bevel structure 44, so that the contact area between the connecting structure 41 and the open end of the steel shell 10 is increased, and stable combination is facilitated. The outer side of the connection structure 41 is flush with the outer side of the steel can 10, making the appearance of the battery 100 more complete.
In another embodiment, as shown in fig. 3, the connecting structure 41 is a T-shaped structure, and the connecting structure 41 can be reliably and stably combined with the bottom steel cover 30 and the steel shell 10 respectively after being melted by laser.
As shown in fig. 1 and 2, the middle part of the bottom steel cover 30 is provided with an injection hole 32, the middle part of the negative electrode current collecting disc 40 is provided with a first liquid flow hole 45, the center of the winding core 20 is provided with a second liquid flow hole 23, and the injection hole 32, the first liquid flow hole 45 and the second liquid flow hole 23 are opposite to each other and communicated. In the injection, the electrolyte is injected into the core 20 through the injection hole 32, and the electrolyte diffuses outward from the core 20. After the pouring, the pouring hole 32 is sealed by a sealing nickel plate 33. The sealing nickel piece 33 is placed in the liquid injection hole 32, and after laser melting, the periphery of the sealing nickel piece 33 is bonded to the side wall of the liquid injection hole 32, thereby achieving sealing.
As shown in fig. 1 and 2, the battery 100 of the present utility model further includes a post 50 and a positive current collecting plate 60.
The mounting hole 12 is opened at the close-up end of the steel shell 10, the positive electrode current collecting plate 60 is mounted in the steel shell 10 and welded to the positive electrode tab 21, the pole 50 is mounted in the mounting hole 12, the pole 50 is electrically connected with the positive electrode current collecting plate 60, and the pole 50 serves as the positive electrode of the battery 100. A first insulating member 70 is installed between the positive current collecting disc 60 and the steel shell 10, a second insulating member 80 is installed between the pole column 50 and the steel shell 10, and the first insulating member 70 and the second insulating member 80 realize insulation of the positive electrode.
The foregoing disclosure is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.
Claims (10)
1. A battery, characterized in that: including steel shell, roll up core, bottom steel lid and negative pole current collecting tray, roll up the core install in the steel shell, the one end of steel shell is open to be arranged and the other end is the binding off to be arranged, the both ends of rolling up the core form anodal utmost point ear and negative pole utmost point ear respectively, negative pole current collecting tray with the bottom steel lid is located the open end of steel shell, negative pole current collecting tray locates between negative pole utmost point ear and the bottom steel lid, negative pole current collecting tray weld in negative pole utmost point ear, the edge thickening forms connection structure around the negative pole current collecting tray, connection structure through laser melting's mode respectively with the bottom steel lid with the steel shell combines, makes the bottom steel lid right the open end of steel shell seals.
2. The battery of claim 1, wherein the connection structure is a triangular structure that continuously thickens in a radial direction of the anode current collecting disk.
3. The battery of claim 1, wherein the connection structure circumferentially surrounds the bottom steel cover.
4. The battery of claim 1, wherein the connection structure circumferentially surrounds the open end of the steel can.
5. The battery of claim 1, wherein the periphery of the bottom steel cover is provided with a first bevel structure, the connecting structure is formed with a second bevel structure, the connecting structure is formed with a containing space for containing the bottom steel cover, the bottom steel cover is arranged in the containing space, and the first bevel structure is in fit connection with the second bevel structure.
6. The battery of claim 1, wherein the edge of the open end of the steel can is provided with a third bevel structure, the connecting structure is formed with a fourth bevel structure, and the third bevel is in abutting joint with the fourth bevel structure.
7. The battery of claim 1, wherein the connection structure is a T-shaped structure.
8. The battery of claim 1, wherein the outer side of the connecting structure is flush with the outer side of the steel can.
9. The battery of claim 1, wherein the middle part of the bottom steel cover is provided with a liquid injection hole, the middle part of the negative electrode current collecting disc is provided with a first liquid flow hole, the middle part of the winding core is provided with a second liquid flow hole, the liquid injection hole, the first liquid flow hole and the second liquid flow hole are opposite to each other and communicated, and the liquid injection hole is sealed by a sealed nickel sheet.
10. The battery of claim 1, further comprising a post and a positive current collecting plate, wherein the closed end of the steel can is provided with a mounting hole, the positive current collecting plate is mounted in the steel can and welded to the positive tab, the post is mounted in the mounting hole, the post is electrically connected with the positive current collecting plate, a first insulating member is mounted between the positive current collecting plate and the steel can, and a second insulating member is mounted between the post and the steel can.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321833395.4U CN220358203U (en) | 2023-07-12 | 2023-07-12 | Battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321833395.4U CN220358203U (en) | 2023-07-12 | 2023-07-12 | Battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220358203U true CN220358203U (en) | 2024-01-16 |
Family
ID=89503112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321833395.4U Active CN220358203U (en) | 2023-07-12 | 2023-07-12 | Battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220358203U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119050491A (en) * | 2024-07-16 | 2024-11-29 | 东莞市创明电池技术有限公司 | Method for manufacturing rechargeable cylindrical battery body |
| WO2025206569A1 (en) * | 2024-03-25 | 2025-10-02 | 주식회사 엘지에너지솔루션 | Battery cell, and battery pack and vehicle including same |
-
2023
- 2023-07-12 CN CN202321833395.4U patent/CN220358203U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025206569A1 (en) * | 2024-03-25 | 2025-10-02 | 주식회사 엘지에너지솔루션 | Battery cell, and battery pack and vehicle including same |
| CN119050491A (en) * | 2024-07-16 | 2024-11-29 | 东莞市创明电池技术有限公司 | Method for manufacturing rechargeable cylindrical battery body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN220358203U (en) | Battery cell | |
| WO2023185507A1 (en) | Cylindrical battery and manufacturing process therefor | |
| CN114678600A (en) | A Novel Cylindrical Full Tab Battery Structure and Its Assembly Welding Process | |
| CN201478392U (en) | High-power lithium ion power battery with collecting disc | |
| CN101877413A (en) | A single battery and a power battery pack comprising the single battery | |
| CN106169540B (en) | A kind of aluminum shell column lithium ion battery | |
| CN113131102A (en) | Battery and manufacturing method thereof | |
| JP2016004776A (en) | Secondary battery | |
| CN217239694U (en) | Cylinder lithium cell | |
| CN114709530B (en) | Soft-package full-lug cylindrical battery cell | |
| CN216213939U (en) | Battery cell, battery and electronic equipment | |
| CN218123567U (en) | Cylindrical lithium ion battery | |
| CN215815997U (en) | Battery cell and lithium ion battery | |
| CN201017923Y (en) | Battery cover board and battery | |
| CN212136590U (en) | Lithium ion battery negative pole piece and lithium ion battery | |
| CN201126833Y (en) | Aluminum alloy shell lithium-ion battery structure | |
| CN219626765U (en) | Cover plate assembly and battery | |
| CN113300032A (en) | High-capacity battery | |
| CN220172332U (en) | A cover assembly and battery | |
| CN218414703U (en) | Battery core connecting assembly and battery | |
| CN218299980U (en) | Battery core and battery pack | |
| CN218648037U (en) | Power battery top cover structure | |
| CN217641480U (en) | Battery cell | |
| CN218849720U (en) | Tab structure, electrode core and soft package battery | |
| CN214753930U (en) | A battery cover structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |