CN116315331A - Battery top cover and battery - Google Patents
Battery top cover and battery Download PDFInfo
- Publication number
- CN116315331A CN116315331A CN202310073493.0A CN202310073493A CN116315331A CN 116315331 A CN116315331 A CN 116315331A CN 202310073493 A CN202310073493 A CN 202310073493A CN 116315331 A CN116315331 A CN 116315331A
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- China
- Prior art keywords
- top cover
- riveting
- cover plate
- battery
- rivet
- 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.)
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- 239000011810 insulating material Substances 0.000 claims abstract description 10
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 9
- 230000004308 accommodation Effects 0.000 claims description 5
- 239000004809 Teflon Substances 0.000 claims description 4
- 229920006362 Teflon® Polymers 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 239000004734 Polyphenylene sulfide Substances 0.000 description 7
- 229920000069 polyphenylene sulfide Polymers 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a battery top cover and a battery, and relates to the technical field of batteries. The battery top cover comprises a top cover plate, a pole column and a riveting piece; the riveting piece is made of insulating materials and comprises a riveting part positioned at the outer side of the top cover plate and a boss part positioned in the mounting hole of the top cover plate, and the riveting piece is provided with a first through hole penetrating through the boss part; the pole penetrates through the first through hole of the riveting piece and is riveted with the top cover plate, the pole comprises a riveting cap arranged on the outer side of the top cover plate and a column body penetrating through the first through hole, the riveting cap and the column body are integrally formed, and the unilateral extending size of the riveting cap relative to the column body is larger than or equal to 2mm. The battery top cover provided by the embodiment can improve the overcurrent capacity of the battery core, and is beneficial to realizing quick charge and quick discharge of the battery.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery top cover and a battery.
Background
Along with the development of new energy industry, in order to cater to the long duration of people to new energy automobile, shorten the charging time, and the hot spot demand of energy storage market high-rate charging and discharging, battery etc. are all developing towards high-rate, fast-charging direction, and the top cap is as the main structure of electric core, must carry out technical scheme innovation in order to cater to this demand.
The current battery cell top cover, the mainstream is still the riveting form, and current riveting top cover usually contains utmost point post, riveting piece or rivet, goes up the plastic, specifically adopts the pressure riveting mode to combine riveting piece or rivet and utmost point post and rivet to on the lamina tecti, goes up the plastic and plays insulating effect, because utmost point post and riveting piece are not an entity, and then can lead to the big problem of internal resistance of battery cell structure spare, is unfavorable for filling the market trend of putting soon.
Disclosure of Invention
The invention solves the problems that: how to improve the fast charge and fast discharge performance of the battery.
In order to solve the problems, the invention provides a battery top cover, which comprises a top cover plate, a pole column and a riveting piece; the riveting piece is made of insulating materials and comprises a riveting part positioned at the outer side of the top cover plate and a boss part positioned in the mounting hole of the top cover plate, and the riveting piece is provided with a first through hole penetrating through the boss part; the pole penetrates through the first through hole of the riveting piece and is riveted with the top cover plate, the pole comprises a riveting cap arranged on the outer side of the top cover plate and a column body penetrating through the first through hole, the riveting cap and the column body are integrally formed, and the unilateral extending size of the riveting cap relative to the column body is larger than or equal to 2mm.
Optionally, the riveting part is provided with a first accommodating groove with an opening facing away from the top cover plate, and the inner side wall of the first accommodating groove is provided with a first rotation stopping protrusion; the riveting cap is located in the first accommodating groove, and a first rotation stopping groove matched with the first rotation stopping protrusion is formed in the outer edge of the riveting cap.
Alternatively, the bottom wall of the first receiving groove is inclined and gradually becomes greater in depth in the direction of the first through hole from the edge of the caulking portion toward the center.
Optionally, the outer side wall of the top cover plate is provided with a second accommodating groove, the riveting part is located in the second accommodating groove, and the outer side wall of the riveting part is in contact with the inner side wall of the second accommodating groove.
Optionally, an outer side wall of the top cover plate is provided with a first annular boss surrounding the riveting portion, and an inner side wall of the first annular boss is in contact with the outer side wall of the riveting portion.
Optionally, a second rotation stopping protrusion is arranged on the outer side wall of the top cover plate, and extends along the radial direction of the mounting hole; the riveting part is provided with a second rotation stopping groove matched with the second rotation stopping protrusion on one side facing the top cover plate.
Optionally, a step structure is formed at the connection part of the column part of the pole and the riveting cap.
Optionally, the material of the riveting piece is PPS material, PPS modified material or Teflon.
Optionally, the pole is formed into the rivet cap by a spin riveting process.
Optionally, the battery top cover further comprises a lower plastic and a sealing ring; the lower plastic is located on the inner side of the top cover plate and is provided with a second through hole corresponding to the mounting hole, the sealing ring is arranged at the mounting hole, and the pole sequentially penetrates through the first through hole of the riveting piece, the sealing ring and the second through hole of the lower plastic and is riveted with the top cover plate.
Optionally, the pole comprises a positive pole and a negative pole, the riveting piece comprises a positive pole riveting piece and a negative pole riveting piece, the positive pole is riveted with the top cover plate through the positive pole riveting piece, and the negative pole is riveted with the top cover plate through the negative pole riveting piece;
the surface of the positive electrode riveting piece is coated with a conductive layer or a conductive medium is doped in the insulating material of the positive electrode riveting piece, so that the positive electrode post and the top cover plate are electrically connected.
The invention also provides a battery comprising a battery top cover as described in any one of the above.
Compared with the prior art, the invention has the following beneficial effects:
in the invention, the pole is of a cap-pole integrated structure, namely, the riveting cap and the pole body of the pole are of an integrated structure, and the riveting cap of the pole is formed by deforming the end part of the pole body in the riveting process. Compared with a combined pole structure formed by riveting a pole and a top cover plate by adopting a riveting block or a rivet, the pole structure has small internal resistance, can improve the overcurrent efficiency of a battery core, and is beneficial to realizing quick charge and quick discharge of a battery; in addition, in the prior art, the riveting cap of the pole structure is formed through the riveting block or the rivet, and is limited by the size of the riveting block or the rivet, and the top area of the finally formed riveting cap is often smaller, unlike the pole of the invention is a cap-column integrated riveting cap which is formed by deforming the end part of the column part in the riveting process, the top area of the formed riveting cap is larger, and the top area of the riveting cap formed after riveting can be further increased by adopting the column part with larger diameter.
Drawings
Fig. 1 is a schematic view of a partial cross-sectional structure of a battery top cover provided by an embodiment of the present invention before riveting a pole;
fig. 2 is a schematic view of a partial cross-sectional structure of a battery top cover according to an embodiment of the present invention;
fig. 3 is a schematic view of a partial cross-sectional structure of a battery top cover according to another embodiment of the present invention;
fig. 4 is a schematic view of a partial cross-sectional structure of a battery top cover according to another embodiment of the present invention;
fig. 5 is a schematic structural view of a riveting member of a battery top cover according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a post of a battery top cover according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a post of a battery top cover before riveting according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a top cover plate of a battery top cover according to an embodiment of the present invention;
fig. 9 is a schematic structural view of a riveting member for a battery top cover according to another embodiment of the present invention;
fig. 10 is a schematic diagram of the overall structure of a battery top cover according to an embodiment of the present invention;
fig. 11 is a schematic overall sectional structure of a battery top cover according to an embodiment of the present invention.
Reference numerals illustrate:
1. a top cover plate; 11. a second accommodation groove; 12. a first annular boss; 13. a second rotation stopping protrusion; 14. a second annular boss; 2. a pole; 201. a positive electrode post; 202. a negative electrode post; 21. riveting a cap; 22. a column portion; 23. a base; 220. a step structure; 221. an annular protrusion; 211. a first rotation stopping groove; 3. a rivet; 301. positive electrode riveting piece; 302. a negative electrode rivet; 31. a caulking portion; 32. a boss portion; 311. a first accommodation groove; 312. a first rotation stopping protrusion; 313. a second rotation stopping groove; 314. an annular groove; 4. a seal ring; 5. lower plastic; 201. a positive electrode post; 202. a negative electrode post; 301. positive electrode riveting piece; 302. and a negative electrode rivet.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. In addition, the term "plurality" in the present invention means that the number is larger than 1, and for example, "plurality" means that two or more are included.
Referring to fig. 2 and 3, an embodiment of the present invention provides a battery top cover, which includes a top cover plate 1, a pole 2, and a rivet 3; the riveting piece 3 is made of insulating materials, the riveting piece 3 comprises a riveting part 31 positioned at the outer side of the top cover plate 1 and a boss part 32 positioned in a mounting hole of the top cover plate 1, and the riveting piece 3 is provided with a first through hole penetrating through the boss part 32; the pole 2 penetrates through the first through hole of the riveting piece 3 and is riveted with the top cover plate 1, the pole 2 comprises a riveting cap 21 positioned on the outer side of the top cover plate 1 and a column portion 22 penetrating through the first through hole, the riveting cap 21 and the column portion 22 are integrally formed, and the unilateral extension dimension d of the riveting cap 21 relative to the column portion 22 is larger than or equal to 2mm.
Specifically, the battery top cover is generally composed of a top cover plate 1, a post assembly, an explosion-proof valve, etc., for assembly with a battery case to form a sealed space for accommodating an electric core and an electrolyte. The top cover plate 1 is provided with a mounting hole penetrating through the thickness direction of the top cover plate 1, namely, the mounting hole is vertical in fig. 1, the pole column assembly comprises a pole column 2, the pole column 2 penetrates through the mounting hole and is riveted on the top cover plate 1, the riveting piece 3 is arranged between the pole column 2 and the top cover plate 1 and comprises a riveting part 31 and a boss part 32, the riveting cap 21 and the column part 22 of the pole column 2 can be prevented from being in contact with the top cover plate 1, and an insulating effect is achieved.
"outside of the top cover plate 1", i.e., the side of the top cover plate 1 facing the outside of the battery, or the side of the top cover plate 1 facing away from the battery, correspondingly, "outside side wall of the top cover plate 1", i.e., a side wall body of the top cover plate 1 facing the outside of the battery, "inside of the top cover plate 1", i.e., the side of the top cover plate 1 facing the inside of the battery, or the side of the top cover plate 1 facing the battery. The "single-side protruding dimension d" is the length of the bill of the rivet cap 21 extending outwardly.
In this embodiment, the pole 2 is of a cap-and-post integrated structure, that is, the riveting cap 21 and the cylindrical portion 22 of the pole 2 are of an integrated structure, the riveting cap 21 of the pole 2 is formed by deforming the end of the cylindrical portion 21 through a riveting process, specifically, the mating form of the pole 2 and the rivet 3 before riveting is shown with reference to fig. 1, and the mating form of the pole 2 and the rivet 3 after the riveting to form the riveting cap 21 is shown with reference to fig. 2. Compared with a combined pole structure formed by riveting a pole and a top cover plate by adopting a riveting block or a rivet, the pole structure of the embodiment has small internal resistance, can improve the overcurrent efficiency of the battery core, and is beneficial to realizing the quick charge and quick discharge of the battery; in addition, in the prior art, the riveting cap of the pole structure is formed by the riveting block or the rivet, and is limited by the size of the riveting block or the rivet, and the top area of the finally formed riveting cap is often smaller, unlike the pole 2 of the embodiment is a cap-column integrated riveting cap 21 formed by deforming the end part of the column part 21 in the riveting process, the top area of the formed riveting cap 21 is larger, and the top area of the riveting cap 21 formed after riveting can be further increased by adopting the column part 22 with a larger diameter, specifically, in the embodiment, the single-side extension d of the riveting cap 21 of the pole 2 is larger than or equal to 2mm, which is far larger than 0.2mm-0.5mm in the prior art, so that the top area of the riveting cap 21 is very large, namely, a large-area riveting plane is formed, and the large-area riveting plane is directly connected with an external circuit such as a BUSBAR (BUSBAR), so that the overcurrent capacity of a battery core can be improved, and the battery can be rapidly charged and discharged.
Preferably, the diameter of the column portion 22 of the pole 2 may be set to be greater than or equal to 10mm, the single-side protruding dimension d of the riveting cap 21 formed after riveting is greater than or equal to 2mm, and further, the diameter of the top surface of the riveting cap 21 may be greater than or equal to 14mm, and the top surface is welded with the BUSBAR, so that the overcurrent area of the pole 2 and the BUSBAR (BUSBAR) can be greatly increased, the overcurrent capacity of the battery core is improved, and the fast charge and fast discharge performance of the battery is improved.
In some embodiments, referring to fig. 2, fig. 3 and fig. 10, the battery top cover provided by the embodiments of the present invention may further include a lower plastic 5 and a sealing ring 4; the lower plastic 5 is located at the inner side of the top cover plate 1 and is provided with a second through hole corresponding to the mounting hole of the top cover plate 1, the sealing ring 4 is arranged at the mounting hole of the top cover plate 1, and the pole 22 sequentially penetrates through the first through hole of the riveting piece 3, the sealing ring 4 and the second through hole of the lower plastic 5 and is riveted with the top cover plate 1.
In some embodiments, as shown in connection with fig. 5 and 6, the rivet portion 31 is provided with a first receiving groove 311 open away from the top cover plate 1, and the inner side wall of the first receiving groove 311 is provided with a first rotation stopping protrusion 312; the rivet cap 21 is positioned in the first receiving groove 311, and the outer edge of the rivet cap 21 is provided with a first rotation stopping groove 211 engaged with the first rotation stopping protrusion 312.
In this embodiment, the matching or matching of the groove and the protrusion refers to that the shape and the size of the groove and the protrusion are approximately the same, and the groove and the protrusion can be in plug-in fit.
In this embodiment, the riveting cap 21 formed by riveting is disposed on the riveting portion 31 of the riveting member 3, and the first accommodating groove 311 is disposed on the riveting portion 31, which is beneficial to the preparation and molding of the riveting cap 21, and is beneficial to control and grasp of riveting process parameters, and improvement of molding quality of the riveting cap 21. In addition, after riveting, the first rotation stopping protrusion 312 is engaged with the first rotation stopping groove 211, so that the riveting cap 21 and the riveting member 3 are tightly combined together, and the pole 2 can be effectively prevented from rotating relative to the riveting member 3, and the riveting reliability is improved.
In some embodiments, the bottom wall of the first receiving groove 311 is inclined and has a gradually increasing depth in the direction of the first through hole from the edge of the rivet portion 31 toward the center. In this way, the rivet cap 21 formed in the first accommodating groove 311 has a thickness gradient shape with a thin middle thick edge, which is advantageous to form the rivet cap 21, and is advantageous to welding the rivet cap 21 and an external circuit such as a bus bar, so that poor connection such as welding through caused by too thin root of the rivet cap 21 can be avoided.
In some embodiments, referring to fig. 4, the outer side wall of the top cover plate 1 is provided with a second receiving groove 11, the mounting hole is disposed in the second receiving groove 11, the riveting portion 31 is disposed in the second receiving groove 11, and the outer side wall of the riveting portion 31 contacts with the inner side wall of the second receiving groove 11.
In this embodiment, through setting up second holding tank 11 on lamina tecti 1, set up riveting part 31 in the second holding tank 11 for the lateral wall of riveting part 31 with the inside wall contact of second holding tank 11 can carry out spacingly to riveting part 31 through second holding tank 11, can avoid riveting piece 3 to remove on the one hand, is favorable to carrying out the riveting process, and on the other hand can avoid riveting part 31 deformation to break when riveting, guarantees reliability and insulating effect of riveting piece 3.
In some embodiments, as shown in fig. 2 and 8, the outer side wall of the top cover plate 1 is provided with a first annular boss 12 disposed around the rivet portion 31, and the inner side wall of the first annular boss 12 is in contact with the outer side wall of the rivet portion 31.
In this embodiment, through setting up first annular boss 12 on lamina tecti 1, the inside wall of first annular boss 12 with the lateral wall contact of riveting part 31 can carry out spacingly through first annular boss 12 to riveting part 31, can avoid riveting piece 3 to remove on the one hand, is favorable to carrying out the riveting process, and on the other hand can avoid riveting part 31 deformation to break when riveting, guarantees reliability and insulating effect of riveting piece 3.
In some embodiments, as shown in fig. 8 and 9, the outer side wall of the top cover plate 1 is provided with a second rotation stopping protrusion 13, and the second rotation stopping protrusion 13 extends along the radial direction of the mounting hole; the side of the rivet portion 31 facing the top cover plate 1 has a second rotation-stopping recess 313 that matches the second rotation-stopping protrusion 13.
In the present embodiment, the second rotation stopping protrusion 13 provided on the top cover plate 1 can be inserted into the second rotation stopping groove 313 of the caulking portion 31, thereby preventing the caulking member 3 from rotating with respect to the top cover plate 1 and improving caulking reliability.
Optionally, the top cover plate 1 may further be provided with a second annular boss 14, where the second annular boss 14 is located on the inner side of the first annular boss 12, and the top cover plate 1 may further be provided with an annular groove 314 matched with the second annular boss 13, after riveting, the second rotation stopping protrusion 13 is engaged with the second rotation stopping groove 313, and the second annular boss 14 is engaged with the annular groove 314, so that the riveting piece 3 and the top cover plate 1 are tightly combined together, and riveting quality can be improved. In addition, both ends of the second rotation stopping protrusion 13 of the top cover plate 1 may be connected with the first annular boss 12 and the second annular boss 14, respectively, to strengthen the strength of the second rotation stopping protrusion 12.
In some embodiments, as shown in fig. 6, the connection of the cylindrical portion 22 of the pole 2 and the rivet cap 21 has a stepped structure 220.
The step structure 220 at the joint of the column portion 22 and the rivet cap 21 can strengthen the root portion of the rivet cap 21, and avoid breakage at the root portion when the rivet cap 21 is prepared and molded. In addition, since the rivet cap 21 is formed by extrusion-deforming the end of the cylindrical portion 22, the stepped structure 220 may be formed as one annular protrusion 221 on the cylindrical body before the rivet, and as shown in fig. 7, the annular protrusion 221 divides the cylindrical body into two sections, one of which is deformed into the rivet cap 21 during the rivet process and the other of which is the cylindrical portion 22 located in the mounting hole, so that the annular protrusion 221 structure facilitates the extrusion molding of the rivet cap 21 and the control of the size of the rivet cap 21 after the molding.
In some embodiments, the material of the rivet 3 is PPS material, PPS modified material, or teflon.
PPS (polyphenylene sulfide) material, PPS modified material and teflon are all insulating materials, and have impact resistance, wear resistance and good mechanical properties, and can play a role in riveting and assembling and simultaneously play a role in insulating the pole 2 and the top cover plate 1.
Of course, other materials having good mechanical properties can be used for the rivet 3, which is not limited by the present invention.
In some embodiments, the pole 2 is formed into the rivet cap 21 using a spin riveting process.
The riveting cap 21 formed by the spin riveting process is large in single-side extending size d, a large-area riveting plane is formed at the top of the riveting cap 21, and then the riveting cap is connected with an external circuit such as a bus bar (BUSBAR), so that the overcurrent capacity of the battery core can be improved, and quick charging and quick discharging of the battery can be realized.
In some embodiments, as shown in fig. 10 and 11, in the battery top cover of the present embodiment, the electrode post 2 includes a positive electrode post 201 and a negative electrode post 202, the rivet 3 includes a positive electrode rivet 301 and a negative electrode rivet 302, the positive electrode post 201 is riveted with the top cover plate 1 through the positive electrode rivet 301, and the negative electrode post 202 is riveted with the top cover plate 1 through the negative electrode rivet 302, wherein a surface of the positive electrode rivet 301 is coated with a conductive layer or a conductive medium is doped in an insulating material of the positive electrode rivet 301, so that the positive electrode post 201 is electrically connected with the top cover plate 1.
The solution of the embodiment is suitable for the solution that the positive electrode of the battery core is electrically connected with the top cover plate 1 and is electrically connected with the positive electrode post 201 through the top cover plate 1.
Of course, the present invention is not limited to the above-mentioned scheme, for example, the positive electrode of the battery cell may be electrically connected to the positive electrode post 201 through the adaptor, and in this case, the positive electrode rivet 301 and the negative electrode rivet 302 are both made of insulating materials, and there is no need to coat a conductive layer on the surface or dope a conductive medium in the insulating materials.
In some embodiments, as shown in fig. 2, 3 and 6, the pole 2 further comprises a base 23 located inside the top cover plate 1, and an end of the cylindrical portion 22 remote from the rivet cap 21 is connected to the base 23, and the radial dimensions of the base 23 and the rivet cap 21 are both larger than the radial dimensions of the mounting hole of the top cover plate 1, so that the top cover plate 1 is confined between the base 23 and the rivet cap 21. Alternatively, the base 23, the cylindrical portion 22 and the rivet cap 21 may be of unitary construction, i.e., the entire pole 2 is of unitary construction, such as the positive pole 201 of fig. 11; alternatively, the pole 2 may be a split structure, that is, the column portion 22 and the rivet cap 21 are integrated, and the base 23 and the column portion 22 are split structure and connected by riveting and extrusion, for example, the negative pole 202 in fig. 11.
The embodiment of the invention also provides a battery, which comprises the battery top cover. The battery provided in this embodiment is a secondary battery, for example, a lithium ion battery.
The battery in this embodiment and the battery top cover have the same or similar embodiments and beneficial effects based on the same inventive concept, and are not described here again.
Although the invention is disclosed above, the scope of the invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications will fall within the scope of the invention.
Claims (12)
1. The battery top cover is characterized by comprising a top cover plate (1), a pole column (2) and a riveting piece (3); the riveting piece (3) is made of insulating materials, the riveting piece (3) comprises a riveting part (31) positioned at the outer side of the top cover plate (1) and a boss part (32) positioned in a mounting hole of the top cover plate (1), and the riveting piece (3) is provided with a first through hole penetrating through the boss part (32); the pole (2) passes through the first through hole of the riveting piece (3) and is riveted with the top cover plate (1), the pole (2) comprises a riveting cap (21) positioned on the outer side of the top cover plate (1) and a column part (22) passing through the first through hole, the riveting cap (21) and the column part (22) are integrally formed, and the single-side stretching size of the riveting cap (21) relative to the column part (22) is larger than or equal to 2mm.
2. The battery top cover according to claim 1, characterized in that the rivet portion (31) is provided with a first receiving groove (311) open facing away from the top cover plate (1), the inner side wall of the first receiving groove (311) being provided with a first rotation stopping protrusion (312); the riveting cap (21) is positioned in the first accommodating groove (311), and a first rotation stopping groove (211) matched with the first rotation stopping protrusion (312) is formed in the outer edge of the riveting cap (21).
3. The battery top cover according to claim 2, wherein the bottom wall of the first receiving groove (311) is inclined and gradually becomes larger in depth in the direction of the first through hole from the edge of the caulking portion (31) toward the center.
4. The battery top cover according to claim 1, wherein the outer side wall of the top cover plate (1) is provided with a second accommodation groove (11), the caulking portion (31) is located in the second accommodation groove (11), and the outer side wall of the caulking portion (31) is in contact with the inner side wall of the second accommodation groove (11).
5. The battery top cover according to claim 1, characterized in that the outer side wall of the top cover plate (1) is provided with a first annular boss (12) provided around the caulking portion (31), and the inner side wall of the first annular boss (12) is in contact with the outer side wall of the caulking portion (31).
6. The battery top cover according to claim 1, characterized in that the outer side wall of the top cover plate (1) is provided with a second rotation stopping protrusion (13), the second rotation stopping protrusion (13) extending in the radial direction of the mounting hole; the side of the riveted part (31) facing the top cover plate (1) is provided with a second rotation stopping groove (313) matched with the second rotation stopping protrusion (13).
7. The battery top cover according to claim 1, characterized in that the connection of the cylindrical portion (22) of the pole (2) and the rivet cap (21) has a stepped structure (220).
8. Battery top cover according to claim 1, characterized in that the material of the rivet (3) is PPS material, PPS modified material or teflon.
9. Battery top cover according to claim 1, characterized in that the pole (2) is formed with the rivet cap (21) using a spin riveting process.
10. The battery top cover according to claim 1, further comprising a lower plastic (5) and a sealing ring (4); the lower plastic (5) is located at the inner side of the top cover plate (1) and is provided with a second through hole corresponding to the mounting hole, the sealing ring (4) is arranged at the mounting hole, and the pole (2) sequentially penetrates through the first through hole of the riveting piece (3), the sealing ring (4) and the second through hole of the lower plastic (5) and is riveted with the top cover plate (1).
11. The battery top cover according to any one of claims 1 to 10, wherein the post (2) comprises a positive post (201) and a negative post (202), the rivet (3) comprises a positive rivet (301) and a negative rivet (302), the positive post (2) is riveted with the top cover plate (1) by the positive rivet (301), and the negative post (2) is riveted with the top cover plate (1) by the negative rivet (302);
the surface of the positive electrode riveting piece (301) is coated with a conductive layer or a conductive medium is doped in the insulating material of the positive electrode riveting piece (301), so that the positive electrode post (201) is electrically connected with the top cover plate (1).
12. A battery comprising a battery top cover according to any one of claims 1-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310073493.0A CN116315331A (en) | 2023-02-07 | 2023-02-07 | Battery top cover and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310073493.0A CN116315331A (en) | 2023-02-07 | 2023-02-07 | Battery top cover and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116315331A true CN116315331A (en) | 2023-06-23 |
Family
ID=86780584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310073493.0A Pending CN116315331A (en) | 2023-02-07 | 2023-02-07 | Battery top cover and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116315331A (en) |
-
2023
- 2023-02-07 CN CN202310073493.0A patent/CN116315331A/en active Pending
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