CN219123431U - Positive electrode end structure of cylindrical power battery - Google Patents
Positive electrode end structure of cylindrical power battery Download PDFInfo
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- CN219123431U CN219123431U CN202223139514.4U CN202223139514U CN219123431U CN 219123431 U CN219123431 U CN 219123431U CN 202223139514 U CN202223139514 U CN 202223139514U CN 219123431 U CN219123431 U CN 219123431U
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- 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
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Abstract
The utility model discloses a positive electrode end structure of a cylindrical power battery, which comprises a cylindrical metal shell, a battery core, a positive electrode metal shell cover, an insulating supporting mechanism, a positive electrode conducting plate, an explosion-proof turnover piece, a screw and a confluence metal connecting piece, wherein the cylindrical metal shell cover is arranged on the positive electrode metal shell cover; the inner side of the insulating supporting mechanism is provided with a positive electrode conducting plate, the positive electrode conducting plate is connected with the battery cell, the upper side of the insulating supporting mechanism is provided with an explosion-proof turnover piece, and the explosion-proof turnover piece is in spot welding connection with the positive electrode conducting plate; the lower end of the positive metal shell cover is arranged in the upper end of the cylindrical metal shell, an insulating sheet is arranged between the positive metal shell cover and the cylindrical metal shell, and the lower side of the positive metal shell cover is contacted and abutted with the explosion-proof overturning sheet; the metal connecting piece that converges installs in the upside of anodal metal cap. The bus metal connecting piece fixed by the screw can conduct electricity outwards, so that the conductive performance is good, and the installation stability of a conductive circuit is good; the utility model has good explosion-proof performance, the installation stability of the positive electrode conducting plate and the explosion-proof overturning piece is good, and the installation of the positive electrode metal shell cover is stable.
Description
Technical Field
The utility model relates to the technical field of power batteries, in particular to a positive electrode end structure of a cylindrical power battery.
Background
The cylindrical lithium battery has the advantages of high capacity, high output voltage, good charge-discharge cycle performance, stable output voltage, high-current discharge, electrochemical stability, safety in use, wide working temperature range, environmental friendliness and the like, and is increasingly widely applied. Generally, a cylindrical lithium ion battery includes a battery case, an active material contained in the battery case, an electrolyte impregnated in the battery case, a sealing body mounted on the battery case, and a sealing ring interposed between the sealing body and the battery case.
Chinese patent application CN 214625136U discloses a cylindrical lithium battery, which comprises a metal casing, a battery cell arranged in the metal casing, a cap arranged on the upper opening of the metal casing, wherein the metal casing is connected with the negative electrode of the battery cell, and the cap is connected with the positive electrode of the battery cell; an explosion-proof structure is arranged in the cap and comprises a first aluminum substrate and a second aluminum substrate, the first aluminum substrate is connected with the second aluminum substrate through welding spots, and the first aluminum substrate is connected with the anode of the battery cell. The technical problem that this patent exists is: (1) The cylindrical lithium battery is in contact conduction with the external bus plate by virtue of the upper side of the cap, the problem of poor contact is easy to occur due to the contact conduction mode of the cap and the external bus plate, and the installation stability is not good enough; (2) The outer periphery of the first aluminum substrate of the explosion-proof structure is not arranged on the inner wall of the metal shell through the supporting mechanism, but is arranged on the lower side of the second aluminum substrate through the insulating mechanism, so that the stability is not good enough, and the explosion-proof performance is affected; (3) The lower end of the cap is arranged on the inner side of the insulation mechanism and is not supported and positioned by the upper end of the metal shell, so that the stability of the cap is not good enough.
Disclosure of Invention
The utility model aims to solve the technical problems of the prior art, and provides a positive electrode end structure of a cylindrical power battery, wherein the positive electrode end structure is provided with a confluence metal connecting sheet fixed by a screw, and the confluence metal connecting sheet can conduct electricity outwards, so that the conductive performance is good, and the installation stability of a conductive circuit is good; the positive electrode end structure is provided with the insulating supporting mechanism, the positive electrode conducting plate and the explosion-proof overturning piece are installed through the insulating supporting mechanism, the lower side of the middle part of the explosion-proof overturning piece is in spot welding connection with the upper side of the middle part of the positive electrode conducting plate, the explosion-proof overturning piece can overturn upwards, the explosion-proof performance is good, and the installation stability of the positive electrode conducting plate and the explosion-proof overturning piece is good; the lower extreme of this positive pole metal casing lid of positive pole end structure is installed in the upper end of cylinder type metal casing, is equipped with the insulating piece between positive pole metal casing lid and the cylinder type metal casing, can surround fixedly to the lower extreme of positive pole metal casing lid through the upper end of cylinder type metal casing, and positive pole metal casing lid installation is firm.
In order to solve the technical problems, the technical scheme of the utility model is as follows: the positive electrode end structure of the cylindrical power battery comprises a cylindrical metal shell, an electric core, a positive electrode metal shell cover, an insulating supporting mechanism, a positive electrode conducting plate, an explosion-proof turnover piece, a screw and a confluence metal connecting piece; the battery cell, the insulating supporting mechanism, the positive electrode conducting plate and the explosion-proof turnover piece are respectively arranged in the cylindrical metal shell, the insulating supporting mechanism is positioned above the battery cell, the positive electrode conducting plate is arranged on the inner side of the insulating supporting mechanism, the positive electrode conducting plate is connected with the battery cell, the explosion-proof turnover piece is arranged on the upper side of the insulating supporting mechanism, the middle part of the explosion-proof turnover piece can be turned upwards, and the lower side of the middle part of the explosion-proof turnover piece is in spot welding connection with the upper side of the middle part of the positive electrode conducting plate; the lower end of the positive electrode metal shell cover is arranged in the upper end of the cylindrical metal shell, an insulating sheet is arranged between the positive electrode metal shell cover and the cylindrical metal shell, and the lower side of the positive electrode metal shell cover is in contact and butt joint with the outer periphery of the explosion-proof turnover sheet; the metal connecting piece that converges installs in the upside of anodal metal cap, and metal connecting piece that converges and anodal metal cap are equipped with the screw respectively, the screw from last down the spiral into the screw.
Preferably, the positive electrode metal shell cover comprises a lower connecting part and an upper connecting part, the lower connecting part is annular as a whole, the upper end of the cylindrical metal shell is bent inwards and surrounds the lower connecting part of the positive electrode metal shell cover, and the insulating sheet is arranged between the lower connecting part and the upper end of the cylindrical metal shell; the upper connecting part protrudes upwards, and the middle part of the upper connecting part is provided with the screw hole.
Preferably, the thickness of the middle part of the upper connecting part of the positive electrode metal shell cover is 2-3 times of the thickness of the outer peripheral part, the screw passes through the screw hole downwards, and the lower end of the screw is not contacted with the explosion-proof turnover piece.
Preferably, the insulation supporting mechanism comprises an insulation outer ring, an insulation inner ring and an insulation upper ring, wherein the outer side of the insulation outer ring is connected with the inner wall of the cylindrical metal shell, the insulation inner ring is arranged on the inner side of the insulation outer ring, and the insulation upper ring is arranged on the upper sides of the insulation outer ring and the insulation inner ring; a positioning groove is formed in the inner side of the upper end of the insulating inner ring, and the outer peripheral part of the positive electrode conducting plate is arranged in the positioning groove of the insulating inner ring; the outer peripheral portion of the explosion-proof flip piece is mounted on the upper side of the insulating upper ring.
Preferably, the positive electrode end structure of the cylindrical power battery further comprises a flat gasket and a spring gasket, the flat gasket is arranged on the upper side of the converging metal connecting sheet, the spring gasket is arranged on the upper side of the flat gasket, the flat gasket and the spring gasket are respectively provided with a middle hole, and after the screw passes through the middle holes of the flat gasket and the spring gasket from top to bottom, the screw is screwed into the screw holes of the converging metal connecting sheet and the positive electrode metal shell cover from top to bottom.
Preferably, the positive electrode conductive plate is a porous circular metal aluminum plate, and the explosion-proof overturning sheet is a circular metal aluminum explosion-proof overturning sheet.
Preferably, the cylindrical metal shell is a cylindrical steel shell, and the positive electrode metal shell cover is a positive electrode aluminum shell cover.
The beneficial effects of the utility model are as follows: the bus metal connecting sheet fixed by the screw is arranged, and can conduct electricity outwards, so that compared with a traditional contact type conduction mode, the bus metal connecting sheet is good in conductivity and good in installation stability of a conductive circuit; the utility model is provided with the insulating supporting mechanism, the positive electrode conducting plate and the explosion-proof turnover piece are arranged through the insulating supporting mechanism, the lower side of the middle part of the explosion-proof turnover piece is in spot welding connection with the upper side of the middle part of the positive electrode conducting plate, when the electric core is inflated due to the problems of short circuit, overload and the like, the explosion-proof turnover piece can be jacked up upwards, the explosion-proof turnover piece can be turned upwards and is separated from contact with the positive electrode conducting plate, the explosion-proof performance is good, and the installation stability of the positive electrode conducting plate and the explosion-proof turnover piece is good; the lower end of the positive electrode metal shell cover is arranged in the upper end of the cylindrical metal shell, an insulating sheet is arranged between the positive electrode metal shell cover and the cylindrical metal shell, the lower end of the positive electrode metal shell cover can be surrounded and fixed through the upper end of the cylindrical metal shell, and the positive electrode metal shell cover is stably arranged.
Drawings
Fig. 1 is a longitudinal sectional view of the present utility model.
Fig. 2 is a longitudinal sectional view of the structure of the present utility model after the explosion-proof flip chip is flipped.
Detailed Description
The structural and operational principles of the present utility model will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the present utility model is a positive electrode terminal structure of a cylindrical power battery, characterized in that: the battery comprises a cylindrical metal shell 1, a battery core 2, an anode metal shell cover 3, an insulating supporting mechanism 4, an anode conducting plate 5, an explosion-proof turnover piece 6, a screw 7 and a confluence metal connecting piece 8; the battery cell 2, the insulating support mechanism 4, the positive electrode conducting plate 5 and the explosion-proof turnover sheet 6 are respectively arranged in the cylindrical metal shell 1, the insulating support mechanism 4 is positioned above the battery cell 2, the positive electrode conducting plate 5 is arranged on the inner side of the insulating support mechanism 4, the positive electrode conducting plate 5 and the battery cell 2 are connected with the conducting sheet 9, the explosion-proof turnover sheet 6 is arranged on the upper side of the insulating support mechanism 4, the middle part of the explosion-proof turnover sheet 6 can be turned upwards, and the lower side of the middle part of the explosion-proof turnover sheet 6 is in spot welding connection with the upper side of the middle part of the positive electrode conducting plate 5; the lower end of the positive electrode metal shell cover 3 is arranged in the upper end of the cylindrical metal shell 1, an insulating sheet 10 is arranged between the positive electrode metal shell cover 3 and the cylindrical metal shell 1, and the lower side of the positive electrode metal shell cover 3 is in contact and butt joint with the outer periphery of the explosion-proof turnover sheet 6; the metal connecting sheet 8 that converges installs in the upside of anodal metal cap 3, and metal connecting sheet that converges 8 and anodal metal cap 3 are equipped with screw 81, 31 respectively, screw 7 from top to bottom thread into screw 81, 31. The utility model is provided with the confluence metal connecting sheet 8 fixed by the screw 7, can conduct electricity outwards through the confluence metal connecting sheet 8, and has good conductivity and good installation stability of the conductive circuit compared with the traditional contact type conduction mode; the utility model is provided with an insulating supporting mechanism 4, the positive electrode conducting plate 5 and the explosion-proof turnover piece 6 are arranged through the insulating supporting mechanism 4, the lower side of the middle part of the explosion-proof turnover piece 6 is in spot welding connection with the upper side of the middle part of the positive electrode conducting plate 5, when the electric core 2 is inflated due to the problems of short circuit, overload and the like, referring to fig. 2, the explosion-proof turnover piece 6 can be jacked up to enable the explosion-proof turnover piece 6 to turn up and be separated from contact with the positive electrode conducting plate 5, the explosion-proof performance is good, and the installation stability of the positive electrode conducting plate 5 and the explosion-proof turnover piece 6 is good; the lower end of the positive electrode metal shell cover 3 is arranged in the upper end of the cylindrical metal shell 1, an insulating sheet 10 is arranged between the positive electrode metal shell cover 3 and the cylindrical metal shell 1, the lower end of the positive electrode metal shell cover 3 can be surrounded and fixed through the upper end of the cylindrical metal shell 1, and the positive electrode metal shell cover 3 is stably arranged.
As shown in fig. 1 and 2, the positive electrode metal casing cover 3 includes a lower connection portion 32 and an upper connection portion 33, the lower connection portion 32 is annular overall, the upper end of the cylindrical metal casing 1 is bent inwards and surrounds the lower connection portion 32 of the positive electrode metal casing cover 3, and the insulating sheet 10 is disposed between the lower connection portion 32 and the upper end of the cylindrical metal casing 1; the upper connecting part 33 protrudes upward, and the screw hole 31 is provided in the middle of the upper connecting part 33. The thickness of the middle part of the upper connecting part of the positive electrode metal shell cover 3 is 2-3 times of the thickness of the outer peripheral part, the screw 7 downwards passes through the screw hole 31, and the lower end of the screw 7 is not contacted with the explosion-proof turnover piece 6. So that the screw 7 can be ensured to be connected more firmly, and the screw 7 is prevented from propping the explosion-proof overturning piece 6.
As shown in fig. 1 and 2, the insulation support mechanism 4 includes an insulation outer ring 41, an insulation inner ring 42, and an insulation upper ring 43, wherein the outer side of the insulation outer ring 41 is connected with the inner wall of the cylindrical metal shell 1, the insulation inner ring 42 is mounted on the inner side of the insulation outer ring 41, and the insulation upper ring 43 is mounted on the upper sides of the insulation outer ring 41 and the insulation inner ring 42; a positioning groove 421 is formed on the inner side of the upper end of the insulating inner ring 42, and the outer peripheral portion of the positive electrode conductive plate 5 is mounted in the positioning groove 421 of the insulating inner ring 42; the outer peripheral portion of the explosion-proof flip chip 6 is attached to the upper side of the insulating upper ring 43. The positive electrode conductive plate 5, the explosion-proof flip piece 6, and the positive electrode metal cap 3 can be firmly supported and fixed by the cooperation of the insulating outer ring 41, the insulating inner ring 42, and the insulating upper ring 43.
As shown in fig. 1 and 2, the positive electrode end structure of the cylindrical power battery further comprises a flat gasket 11 and a spring gasket 12, the flat gasket 11 is arranged on the upper side of the metal bus connection sheet 3, the spring gasket 12 is arranged on the upper side of the flat gasket 11, the flat gasket 11 and the spring gasket 12 are respectively provided with a middle hole, and after the screw 7 passes through the middle holes of the flat gasket 11 and the spring gasket 12 from top to bottom, the screw 7 is screwed into the screw holes 81 and 31 of the metal bus connection sheet 8 and the positive electrode metal casing cover 3 from top to bottom. The use of spring washers 12 can increase the screw-on stability of the screw.
As shown in fig. 1 and 2, the positive electrode conductive plate 5 is a porous circular metal aluminum plate, and the explosion-proof overturning sheet 6 is a circular metal aluminum explosion-proof overturning sheet. The cylindrical metal shell 1 is a cylindrical steel shell, and the positive electrode metal shell cover 3 is a positive electrode aluminum shell cover.
In the foregoing, only the preferred embodiment of the present utility model is described, and any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical solutions of the present utility model fall within the scope of the technical solutions of the present utility model.
Claims (7)
1. The positive electrode end structure of the cylindrical power battery is characterized in that: the battery comprises a cylindrical metal shell, a battery cell, a positive electrode metal shell cover, an insulating supporting mechanism, a positive electrode conducting plate, an explosion-proof turnover piece, a screw and a confluence metal connecting piece; the battery cell, the insulating supporting mechanism, the positive electrode conducting plate and the explosion-proof turnover piece are respectively arranged in the cylindrical metal shell, the insulating supporting mechanism is positioned above the battery cell, the positive electrode conducting plate is arranged on the inner side of the insulating supporting mechanism, the positive electrode conducting plate is connected with the battery cell, the explosion-proof turnover piece is arranged on the upper side of the insulating supporting mechanism, the middle part of the explosion-proof turnover piece can be turned upwards, and the lower side of the middle part of the explosion-proof turnover piece is in spot welding connection with the upper side of the middle part of the positive electrode conducting plate; the lower end of the positive electrode metal shell cover is arranged in the upper end of the cylindrical metal shell, an insulating sheet is arranged between the positive electrode metal shell cover and the cylindrical metal shell, and the lower side of the positive electrode metal shell cover is in contact and butt joint with the outer periphery of the explosion-proof turnover sheet; the metal connecting piece that converges installs in the upside of anodal metal cap, and metal connecting piece that converges and anodal metal cap are equipped with the screw respectively, the screw from last down the spiral into the screw.
2. The positive electrode terminal structure of a cylindrical power cell according to claim 1, wherein: the positive electrode metal shell cover comprises a lower connecting part and an upper connecting part, the lower connecting part is annular as a whole, the upper end of the cylindrical metal shell is bent inwards and surrounds the lower connecting part of the positive electrode metal shell cover, and the insulating sheet is arranged between the lower connecting part and the upper end of the cylindrical metal shell; the upper connecting part protrudes upwards, and the middle part of the upper connecting part is provided with the screw hole.
3. The positive electrode terminal structure of a cylindrical power cell according to claim 2, wherein: the thickness of the middle part of the upper connecting part of the positive electrode metal shell cover is 2-3 times of the thickness of the outer peripheral part, the screw downwards passes through the screw hole, and the lower end of the screw is not contacted with the explosion-proof turnover piece.
4. The positive electrode terminal structure of a cylindrical power cell according to claim 1, wherein: the insulation supporting mechanism comprises an insulation outer ring, an insulation inner ring and an insulation upper ring, wherein the outer side of the insulation outer ring is connected with the inner wall of the cylindrical metal shell, the insulation inner ring is arranged on the inner side of the insulation outer ring, and the insulation upper ring is arranged on the upper sides of the insulation outer ring and the insulation inner ring; a positioning groove is formed in the inner side of the upper end of the insulating inner ring, and the outer peripheral part of the positive electrode conducting plate is arranged in the positioning groove of the insulating inner ring; the outer peripheral portion of the explosion-proof flip piece is mounted on the upper side of the insulating upper ring.
5. The positive electrode terminal structure of a cylindrical power cell according to claim 1, wherein: still include flat gasket and spring gasket, flat gasket sets up in the upside of converging metal connection piece, spring gasket sets up in the upside of flat gasket, flat gasket and spring gasket are equipped with the mesopore respectively, after the screw passed flat gasket and spring gasket's mesopore from last down, from last down the screw thread go into again to converging in the screw of metal connection piece and anodal metal cap.
6. The positive electrode terminal structure of a cylindrical power cell according to claim 1, wherein: the positive electrode conductive plate is a porous round metal aluminum plate, and the explosion-proof overturning sheet is a round metal aluminum explosion-proof overturning sheet.
7. The positive electrode terminal structure of a cylindrical power cell according to claim 1, wherein: the cylindrical metal shell is a cylindrical steel shell, and the positive electrode metal shell cover is a positive electrode aluminum shell cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223139514.4U CN219123431U (en) | 2022-11-25 | 2022-11-25 | Positive electrode end structure of cylindrical power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223139514.4U CN219123431U (en) | 2022-11-25 | 2022-11-25 | Positive electrode end structure of cylindrical power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219123431U true CN219123431U (en) | 2023-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223139514.4U Active CN219123431U (en) | 2022-11-25 | 2022-11-25 | Positive electrode end structure of cylindrical power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219123431U (en) |
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2022
- 2022-11-25 CN CN202223139514.4U patent/CN219123431U/en active Active
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