CN114024065A - Casing and cylindrical battery - Google Patents
Casing and cylindrical battery Download PDFInfo
- Publication number
- CN114024065A CN114024065A CN202111463101.9A CN202111463101A CN114024065A CN 114024065 A CN114024065 A CN 114024065A CN 202111463101 A CN202111463101 A CN 202111463101A CN 114024065 A CN114024065 A CN 114024065A
- Authority
- CN
- China
- Prior art keywords
- rivet
- hole
- bottom cover
- cylindrical battery
- housing
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 8
- 239000004734 Polyphenylene sulfide Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Embodiments of the present invention relate to a case including a top cover, a bottom cover, a side wall, an insulating pad, and a rivet. The top cover and the bottom cover are both circular, and the bottom cover is also provided with a through hole; the side wall is cylindrical, the top end of the side wall is hermetically connected with the periphery of the top cover, the bottom end of the side wall is hermetically connected with the periphery of the bottom cover, and the side wall, the top cover and the bottom cover are connected to form a cylindrical shell. The insulating pad is installed in the bottom top, and the insulating pad still includes along the insulating tube that perforates circumference and extend towards the through-hole direction, and the insulating tube is located the through-hole and extends to outside the bottom. The rivet includes rivet head and rivet axle, and the rivet head is connected in the one end of rivet axle and is located the outside of casing, and the rivet axle extends to in the casing along the insulating tube. The rivet is set to prevent that the axis of rivet axle for the bottom from rotating, prevents that the rivet axle from being rotated and taking place to rotate by cylinder electricity core, and then destroys the leakproofness of bottom.
Description
Technical Field
The invention relates to the field of battery production and manufacturing, in particular to a shell and a cylindrical battery.
Background
At present, a large-size cylindrical battery is researched in the market, and the cylindrical battery can be applied to the field of automobiles, such as the battery model 4680 for Tesla, the energy of the battery is greatly improved, and the battery is wide in application. In the production process of the large cylindrical battery, the bottom of the steel shell is connected to the positive output pole of the cylindrical battery core by a rivet, the output shaft of the rivet is a cylinder, one end of the output shaft penetrates through the bottom of the steel shell and is connected to the positive output stage of the battery, and the other end of the output shaft is located at the rivet head externally connected with the steel shell and is output through the rivet head. Cylinder electricity core and box hat all are the cylinder, and in the use, thereby cylinder electricity core can rotate for the box hat and produce torsion, further drives the rivet axle and rotates for the box hat, causes the junction leakproofness of rivet axle and box hat bottom to be destroyed, and irreversible destruction takes place for the rivet structure, and electrolyte in the box hat also can reveal away along rivet axle department, and then arouses scrapping of whole battery.
Disclosure of Invention
The invention aims to provide a shell and a cylindrical battery, which can prevent a rivet shaft from rotating relative to the axis of a bottom cover.
In order to solve the above technical problems, embodiments of the present invention provide a case including a top cover, a bottom cover, a side wall, an insulating pad, and a rivet.
The top cover and the bottom cover are both circular, and the bottom cover is also provided with a through hole; the side wall is cylindrical, the top end of the side wall is hermetically connected with the periphery of the top cover, the bottom end of the side wall is hermetically connected with the periphery of the bottom cover, the side wall, the top cover and the bottom cover are connected to form a cylindrical shell, and the bottom cover and the side wall are integrally formed, preferably a steel shell. The battery can be placed in the shell, the positive electrode of the battery is located at one end close to the bottom cover, the negative electrode of the battery is located at one end close to the top cover and is connected with the shell through the current collecting piece, and the whole shell is connected with the negative electrode of the battery.
The insulating pad is installed in the bottom top and is equipped with the perforation, and the perforation aligns with the through-hole, and the insulating pad still includes along the insulating tube that perforates circumference and extend towards the through-hole direction, and the insulating tube is located in the through-hole and outside extending to the bottom, and the positive pole and the bottom of battery are kept apart to the insulating pad, thereby avoid the anodal contact casing short circuit of battery. The insulating pad can be made of polyester material, and can also be made of polypropylene or polyphenylene sulfide. The insulating pad has a certain thickness to prevent short circuit caused by abrasion in the use process, and the size of the insulating pad is basically consistent with that of the bottom cover and covers the upper part of the bottom cover. The shape of the insulating tube is set according to the shape of the through hole, and the diameter of the insulating tube is slightly smaller than that of the through hole so as to be convenient to install and in the through hole. The position of the insulating tube also needs to be set according to the position of the through hole. The through hole is arranged at the center of the bottom cover, and the insulating tube also needs to be arranged at the center of the insulating pad and aligned with the through hole. The depth of the insulating tube only needs to be greater than the thickness of the bottom cover, namely the insulating tube only needs to extend to the outside of the bottom cover along the through hole to prevent the rivet shaft from contacting the bottom cover.
The rivet includes rivet head and rivet axle, and the rivet head is connected in the one end of rivet axle and is located the outside of casing, and the rivet axle extends to in the casing along the insulating tube, and the rivet axle is connected with the positive pole of battery, in the through-hole of insulating tube installation and bottom, can keep apart rivet axle and bottom effectively, prevents that the rivet axle from contacting the casing in order to take place short circuit phenomenon. The rivet is made of a conductive material, preferably an aluminum material.
The rivet is set to prevent that the axis of rivet axle for the bottom from rotating, prevents that the rivet axle from being rotated and taking place to rotate by cylinder electricity core, and then destroys the leakproofness of bottom.
In one embodiment, the radial cross-section of the rivet shaft is non-circularly symmetric, and the shape of the through-hole is complementary to the radial cross-sectional shape of the rivet shaft.
In one embodiment, the through hole of the bottom cover is offset from an axis of the bottom cover.
In one embodiment, the through hole is provided at the center of the bottom cover, and the rivet head is further provided with a fastener which is eccentrically provided with respect to the axis of the housing and is used to fix the rivet head to the bottom cover
In one embodiment, the bottom cover is further provided with a small hole at a position deviating from the through hole;
an eyelet is arranged on the insulating pad corresponding to the position of the small hole, the insulating pad is provided with an extension part extending towards the small hole along the circumferential direction of the eyelet, and the extension part extends to the outside of the bottom cover;
a threaded hole is formed in the position, corresponding to the small hole, of the rivet head;
the fastener is sealingly mounted with the extension and within the threaded bore.
In one embodiment, the housing further comprises a sealing ring tightly sleeved on the rivet shaft and located outside the bottom cover.
In one embodiment, the housing further comprises an insulating ring having a diameter larger than that of the rivet head and tightly fitted around the outer circumference of the sealing ring.
In one embodiment, a stop ring extending outwards along the circumferential direction of the rivet shaft is arranged at one end of the rivet shaft in the steel shell, and the outer diameter of the stop ring is larger than that of the through hole.
In one embodiment, the rivet is made of aluminum.
In one embodiment, the composition of the seal ring is a fluoroelastomer.
In one embodiment, the insulating ring is composed of resin.
The invention also relates to a cylindrical battery which comprises a cylindrical battery cell and the shell, wherein the cylindrical battery cell is arranged in the shell, and the positive output electrode of the cylindrical battery cell is positioned at one side close to the bottom cover and connected to the rivet shaft.
The invention overcomes the problem of insufficient anti-rotation capability of the riveting structure in the cylindrical battery, and the fastener can prevent the rivet shaft from rotating relative to the bottom cover.
Drawings
FIG. 1 is a schematic view of a housing of one embodiment of the present invention.
Fig. 2 is an exploded view of the housing of one embodiment of the present invention.
Fig. 3 is a schematic view of a bottom cover of one embodiment of the present invention.
Fig. 4 is a schematic view of an insulating pad of one embodiment of the present invention.
FIG. 5 is a schematic view of a rivet, seal ring, insulator ring, and fastener of one embodiment of the present invention.
Reference numerals: 100. a housing; 1. a bottom cover; 11. a through hole; 12. a small hole; 2. a side wall; 3. an insulating pad; 31. an insulating tube; 32. an extension portion; 4. riveting; 41. a rivet shaft; 42. a rivet head; 421. a threaded hole; 43. a stop ring; 5. a seal ring; 6. an insulating ring; 7. a fastener; 200. a cylindrical battery.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
The invention relates to a shell 100, wherein the shell 100 is used for mounting a cylindrical battery cell, and as shown in fig. 1, the shell 100 comprises a top cover, a bottom cover 1, a side wall 2, an insulating pad 3 and a rivet 4.
The top cover and the bottom cover 1 are both circular, and the bottom cover 1 is also provided with a through hole 11; the side wall 2 is cylindrical, the top end of the side wall 2 is hermetically connected with the periphery of the top cover, the bottom end of the side wall 2 is hermetically connected with the periphery of the bottom cover 1, the side wall 2 is connected with the top cover and the bottom cover 1 to form a cylindrical shell 100, and the bottom cover 1 and the side wall 2 are integrally formed, preferably a steel shell. The cylinder electricity core can be placed in casing 100, and the positive pole of cylinder electricity core is located the one end that is close to bottom 1, and the negative pole of cylinder electricity core is located the one end that is close to the top cap and connects in casing 100 through the current collector, and the negative pole of cylinder electricity core is all connected to whole casing 100.
The insulating pad 3 is installed above the bottom cover 1 and a through hole is arranged in the middle of the insulating pad, as shown in fig. 2 and 4, the through hole is aligned with the through hole 11, the insulating pad 3 further comprises an insulating tube 31 extending towards the direction of the through hole 11 along the circumferential edge of the through hole, the insulating tube 31 is located in the through hole 11 and extends out of the bottom cover 1, and the insulating pad 3 isolates the positive electrode of the battery from the bottom cover 1, so that the positive electrode of the battery is prevented from contacting the shell 100, and short circuit is avoided. The insulating pad 3 may be made of polyester, polypropylene or polyphenylene sulfide. The insulating pad 3 has a certain thickness to prevent short circuit due to abrasion in use, and the insulating pad 3 has a size substantially identical to that of the bottom cover 1 and covers the top of the bottom cover 1. The shape of the insulating tube 31 is set according to the shape of the through hole 11, and the diameter of the insulating tube 31 is slightly smaller than that of the through hole 11 to facilitate installation into the through hole 11. The position of the insulating tube 31 also needs to be set according to the position of the through hole 11, and in the embodiment shown in fig. 1, the through hole 11 is set at the center of the bottom cover 1, and the insulating tube 31 also needs to be set at the center of the insulating pad 3, aligned with the through hole 11. The depth of the insulating tube 31 only needs to be larger than the thickness of the bottom cover 1, that is, the insulating tube 31 only needs to extend along the through hole 11 to the outside of the bottom cover 1 to prevent the rivet shaft 41 from contacting the bottom cover 1.
The rivet 4 includes a rivet head 42 and a rivet shaft 41, as shown in fig. 2 and 5, the rivet shaft 1 extends from one side of the rivet head 42 toward the through hole, and the rivet head is located outside the case 100, the rivet shaft 41 extends into the case 100 along the insulating tube 31, the rivet shaft 41 is connected to the positive electrode of the battery, the insulating tube 31 is installed in the through hole 11 of the bottom cover 1, the rivet shaft 41 and the bottom cover 1 can be effectively isolated, and the rivet shaft 41 is prevented from contacting the case 100 to cause a short circuit phenomenon. The rivet 4 is made of a conductive material, preferably an aluminum material.
The rivet 4 is set to prevent the rivet shaft 41 from rotating relative to the axis of the bottom cover 1, and prevent the rivet shaft 41 from rotating by the cylindrical battery core, thereby damaging the sealing performance of the bottom cover 1. It will be appreciated that there are many embodiments for preventing rotation of the rivet shaft 41 relative to the axis of the bottom cover 1, for example, in the first embodiment, the rivet shaft 41 has a polygonal radial cross-section, the through-hole 11 has a shape complementary to the radial cross-section of the rivet shaft 41, and the inner wall of the non-circular through-hole 11 has a plurality of corners which are effective to catch the rivet shaft 41 having a non-circular cross-section to prevent rotation of the rivet shaft 41. It will be appreciated that other non-circular asymmetrical configurations may prevent the rivet shaft 41 from rotating, such as an oval or other irregular shape, and that due to the asymmetrical configuration of the through hole 11, the rivet shaft 41 needs to be aligned with the corresponding position of the through hole 11 when installed.
In a second embodiment, the through hole 11 of the bottom cover 1 deviates from the axis of the bottom cover 1, at this time, the through hole 11 may be circular, the rivet shaft 41 is of a cylindrical structure, the center of the circle of the through hole 11 deviates from the center of the bottom cover 1, that is, the axis of the rivet shaft 41 deviates from the center of the bottom cover 1, because the axis of the cylindrical battery cell overlaps with the axis of the bottom cover 1, and the cylindrical battery cell rotates relative to its own axis or the axis of the bottom cover 1, the rivet shaft 41 generates a driving force to move along the axis of the bottom cover 1 when being rotated by the cylindrical battery cell, and because the axis of the rivet shaft 41 is misaligned with the axis of the bottom cover 1, the rivet shaft 41 is limited by the through hole 11, thereby preventing the rivet shaft 41 from moving relative to the axis of the bottom cover 1. It should be understood that the cross-sectional shape of the rivet shaft 41 may be arbitrarily set in this embodiment.
In the third embodiment, the through hole 11 is provided at the center of the bottom cover 1, as shown in fig. 2 and 3, the housing 100 further includes a fastener 74, and the fastener 74 is provided eccentrically with respect to the axis of the housing 100 and serves to fix the rivet head 42 to the bottom cover 1. Specifically, the bottom cover 1 is further provided with a small hole 12 at a position deviated from the through hole 11, an eyelet is provided on the insulating pad 3 at a position corresponding to the small hole 12, the insulating pad 3 is provided with an extension portion 32 extending from the outer periphery of the eyelet toward the small hole 12, the extension portion 32 extends to the outside of the bottom cover 1, the extension portion 32 is a hollow tube and is installed in the small hole 12, the fastener 74 can be installed in the extension portion 32, and the extension portion 32 can prevent the fastener 74 from contacting the bottom cover 1. The position deviating from the axis of the rivet shaft 41 on the rivet head 42 is provided with a threaded hole 421, the position of the threaded hole 421 corresponds to the position of the small hole 12, the fastener 74 is hermetically installed in the extension portion 32 and the threaded hole 421, one end of the fastener 74 penetrates through the extension portion 32 to reach the inside of the casing 100, the other end of the fastener is located outside the rivet head 42, the fastener 74 deviates from the center of the bottom cover 1, and when the cylindrical battery core rotates, the rivet 4 is limited by the fastener 74 and is fixed on the bottom cover 1. One end of the fastener 74 is located within the housing 100 and may contact the positive pole of the cylindrical cell, and the extension 32 may prevent the fastener 74 from contacting the inner wall of the aperture 12 and causing a short circuit.
Furthermore, a plurality of fasteners 74 can be arranged, a plurality of small holes 12 can be arranged on the bottom cover 1, a plurality of small holes 12 can be symmetrically arranged along the center of the bottom cover 1, and the plurality of fasteners 74 are respectively connected to the rivet head 42 through the small holes 12, so that the anti-rotation effect can be enhanced.
Further, the fastening member 74 may be provided with a sealing ring in a circumferential direction to enhance sealability between the fastening member 74 and the bottom cover 1, thereby preventing the electrolyte inside the case 100 from leaking. The fastener can be an anti-rotation rivet, and the shaft of the anti-rotation rivet needs to be matched with the small hole 12 to form tight connection. The fastener may also be a screw which, in cooperation with the bolt, prevents rotation of the rivet 4 after the screw has passed through the aperture 12.
The casing 100 further includes a sealing ring 5, as shown in fig. 2 and 5, the sealing ring 5 is tightly sleeved on the rivet shaft 41 and located outside the bottom cover 1, the sealing ring 5 has a certain elasticity, the diameter of the opening of the sealing ring 5 is slightly smaller than the diameter of the rivet shaft 41, and the sealing ring 5 is sleeved on the rivet shaft 41 to enable tight connection between the sealing ring 5 and the rivet shaft 41, so that electrolyte is prevented from leaking out of the casing 100 through the rivet shaft 41. In the embodiment shown in fig. 1, the diameter of the sealing ring 5 is smaller than the outer diameter of the rivet head 42, in order to ensure the sealing performance of the sealing ring 5, the opening of the sealing ring 5 is very small, and the outer diameter of the sealing ring 5 is small, so that the installation is convenient, and it can be understood that in other embodiments, the outer diameter of the sealing ring 5 may be larger than the rivet head 42, so that the sealing performance of the sealing ring 5 can be ensured. The seal ring 5 is preferably made of fluororubber, but may be made of other silicone materials.
The housing 100 further includes an insulating ring 6, and with continued reference to fig. 2 and 5, the insulating ring 6 has a diameter greater than or equal to the diameter of the rivet head 42 and is tightly fitted around the outer periphery of the sealing ring 5. The insulating ring 6 is located between the rivet head 42 and the bottom cover 1, and can prevent the contact between the rivet head 42 and the bottom cover 1 from causing a short circuit. The insulating ring 6 is made of a non-conductive flexible material such as polyester material, polypropylene, polyphenylene sulfide, and resin material, preferably resin material.
The end of the rivet shaft 41 located in the steel shell is further provided with a stop ring 43 extending outwards along the circumferential direction of the rivet shaft 41, the outer diameter of the stop ring 43 is larger than that of the through hole 11, in the embodiment shown in fig. 1, the stop ring 43 extends perpendicular to the direction of the rivet shaft 41, and the stop ring 43 is connected to the positive pole of the cylindrical battery cell. In the installation process of the casing 100, the seal ring 5 is installed on the rivet shaft 41, the periphery of the seal ring 5 is sleeved with the insulating ring 6, the insulating pad 3 is installed in the bottom cover 1, the insulating tube 31 is installed in the through hole 11 of the bottom cover 1, then the rivet shaft 41, the seal ring 5 and the insulating ring 6 penetrate into the casing 100 from the insulating tube 31 of the insulating pad 3, in order to prevent the rivet shaft 41 from sliding down from the insulating tube 31, one end, located in the casing 100, of the rivet shaft 41 is radially bent to form a stop ring 43, a cylindrical battery cell is installed in the casing 100, and then the positive output electrode of the cylindrical battery cell is connected to the stop ring 43 of the rivet shaft 41.
The invention also relates to a cylindrical battery 200, wherein the cylindrical battery 200 comprises a cylindrical battery core and the shell 100, the cylindrical battery core is arranged in the shell 100, and a positive output pole of the cylindrical battery core is positioned at one side close to the bottom cover 1 and connected to the rivet shaft 41. Specifically, the cylindrical battery 200 further includes two current collecting plates, the two current collecting plates are respectively connected to the positive output electrode and the negative output electrode of the battery, the current collecting plate of the negative output electrode is directly connected to the top cover, and the current collecting plate of the positive output electrode is connected to the rivet shaft 41 on the bottom cover 1. The invention designs a plurality of schemes to prevent the rivet 4 from rotating relative to the axis of the bottom cover 1 and fix the rivet 4 on the bottom cover 1, thereby improving the sealing property of the bottom cover 1 and prolonging the service life of the battery.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (12)
1. A housing for mounting a cylindrical electrical core, the housing comprising:
the top cover is circular;
the bottom cover is circular and is provided with a through hole;
the side wall is cylindrical, the top end of the side wall is hermetically connected with the periphery of the top cover, and the bottom end of the side wall is hermetically connected with the periphery of the bottom cover;
the insulating pad is arranged above the bottom cover and is provided with a through hole, the through hole is aligned with the through hole, the insulating pad further comprises an insulating tube which extends along the circumferential direction of the through hole and towards the direction of the through hole, and the insulating tube is positioned in the through hole and extends out of the bottom cover;
the rivet comprises a rivet head and a rivet shaft, the rivet head is connected to one end of the rivet shaft and is positioned outside the shell, and the rivet shaft extends into the shell along the insulating tube;
the rivet is configured to prevent rotation of the rivet shaft relative to an axis of the bottom cover.
2. The housing of claim 1 wherein the rivet shaft is non-circularly symmetric in radial cross-section, and the through-hole is complementary in shape to the rivet shaft in radial cross-sectional shape.
3. The housing of claim 1, wherein the through-hole of the bottom cover is offset from an axis of the bottom cover.
4. The housing of claim 1,
the through hole is formed in the center of the bottom cover, and the rivet head is further provided with a fastener which is eccentrically arranged relative to the axis of the shell and used for fixing the rivet head to the bottom cover.
5. The housing of claim 4,
a small hole is formed in the position, deviating from the through hole, of the bottom cover;
an eyelet is arranged on the insulating pad corresponding to the position of the small hole, the insulating pad is provided with an extension part extending towards the small hole along the circumferential direction of the eyelet, and the extension part extends to the outside of the bottom cover;
a threaded hole is formed in the position, corresponding to the small hole, of the rivet head;
the fastener is sealingly mounted with the extension and within the threaded bore.
6. The housing of claim 1 further comprising a seal ring tightly fitted over the rivet shaft and located outside the bottom cover.
7. The housing of claim 6 further comprising an insulating ring having a diameter greater than the diameter of the rivet head and closely fitting around the outer periphery of the seal ring.
8. The cylindrical battery casing as claimed in claim 1, wherein the rivet shaft is provided with a stop ring at its end inside the steel casing, the stop ring extending outward in the circumferential direction of the rivet shaft, and the stop ring has an outer diameter larger than the through hole.
9. The cylindrical battery case of claim 1, wherein the rivet is made of aluminum.
10. The cylindrical battery can according to claim 6, wherein the composition of the sealing ring is fluororubber.
11. The cylindrical battery case of claim 7, wherein the insulating ring is composed of resin.
12. A cylindrical battery, characterized in that the cylindrical battery comprises:
the housing of claim 1;
the cylindrical battery cell is installed in the shell, and the positive output electrode of the cylindrical battery cell is located close to one side of the bottom cover and connected to the rivet shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111463101.9A CN114024065B (en) | 2021-12-02 | 2021-12-02 | Shell and cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111463101.9A CN114024065B (en) | 2021-12-02 | 2021-12-02 | Shell and cylindrical battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114024065A true CN114024065A (en) | 2022-02-08 |
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|---|---|
| CN114024065B (en) | 2024-02-27 |
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