CN113540624A - Cylindrical lithium battery - Google Patents
Cylindrical lithium battery Download PDFInfo
- Publication number
- CN113540624A CN113540624A CN202110758260.5A CN202110758260A CN113540624A CN 113540624 A CN113540624 A CN 113540624A CN 202110758260 A CN202110758260 A CN 202110758260A CN 113540624 A CN113540624 A CN 113540624A
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- China
- Prior art keywords
- electrode
- shell
- lithium battery
- cylindrical lithium
- boss
- 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.)
- Pending
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 239000003792 electrolyte Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 239000000428 dust Substances 0.000 abstract description 7
- 238000005096 rolling process Methods 0.000 description 8
- 238000000605 extraction Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000003915 cell function Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
- 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
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
-
- 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
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- 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)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention relates to the technical field of lithium batteries, and provides a cylindrical lithium battery, which comprises: the cylindrical shell is provided with an opening end and a closed end, and a first through hole is formed in the center of the end face of the closed end; the electric core assembly is arranged in the shell and comprises a first electrode end close to the closed end and a second electrode end close to the open end, and the first electrode end and the second electrode end are different in electric property; the first current collecting plate is arranged in the shell and connected with the first electrode end of the electric core assembly, and a boss extending from the first through hole to the outside of the shell is arranged at the central part of the first current collecting plate; the first electrode leading-out end cover is arranged outside the shell and is connected with the boss; and the second electrode leading-out end cover is arranged at the opening end of the shell and connected with the second electrode end of the core assembly and the shell, and the second electrode leading-out end cover is hermetically connected with the shell. The cylindrical lithium battery provided by the invention avoids the phenomena of self-discharge and internal short circuit of the battery caused by metal dust generated in the sealing process of the battery.
Description
Technical Field
The invention belongs to the technical field of lithium batteries, and particularly relates to a cylindrical lithium battery.
Background
The lithium ion battery has the advantages of high energy density, long cycle life, good rate capability and safety, and environmental protection, and is an important energy product for modern electronic products and power automobiles. And the steel shell cylindrical lithium ion batteries have uniform types, high production automation degree, good battery consistency and convenient combination design, are the first choice in the fields of electronic products and power automobiles, and are applied in larger and larger scales.
The conventional cylindrical lithium battery generally comprises a shell with openings at two ends, a battery cell assembly, a positive end cover and a negative end cover, wherein the battery cell assembly is arranged in the shell; when a cylindrical lithium ion battery is packaged, a battery shell is generally required to be subjected to groove rolling treatment, and when the shell fixes a positive end cover, the groove rolling can provide an acting point for fixing the positive end cover, but nickel powder in the groove rolling process falls to cause a short circuit in the battery.
Disclosure of Invention
The invention aims to provide a cylindrical lithium battery, which aims to solve the technical problem that the internal short circuit of the battery is caused by the falling of nickel powder in the rolling groove process of the conventional cylindrical lithium battery.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is a cylindrical lithium battery including: the cylindrical shell is provided with an opening end and a closed end opposite to the opening end, and a first through hole is formed in the center of the end face of the closed end; the electric core assembly is arranged in the shell and comprises a first electrode end close to the closed end and a second electrode end close to the open end, and the first electrode end and the second electrode end are different in electric property; the first current collecting plate is arranged in the shell and connected with the first electrode end of the electric core assembly, and a boss extending from the first through hole to the outside of the shell is arranged at the central part of the first current collecting plate; the first electrode leading-out end cover is arranged outside the shell and is connected with the boss; the second electrode leading-out end cover is arranged on the shell, the open end of the shell is connected with the second electrode end of the electric core assembly and the shell, and the second electrode leading-out end cover is connected with the shell in a sealing mode.
Furthermore, a second collector plate is arranged between the second electrode leading-out end cover and the second electrode end of the electric core assembly.
Furthermore, a second through hole for filling electrolytic solution is formed in the boss.
Furthermore, a groove corresponding to the boss is formed in the first electrode leading-out end cover and used for positioning the first electrode leading-out end cover.
Further, the cylindrical lithium battery further comprises a first sealing member disposed between the first current collecting plate and the closed end of the case.
Furthermore, the first electrode end is provided with a plurality of concave surfaces, the first collector plate is provided with a plurality of convex parts protruding towards the concave surfaces, and the plurality of convex parts are arranged in the plurality of concave surfaces to be fixed.
Furthermore, the opening end of the shell is provided with a flange facing the inside of the shell, and the second electrode leading-out end cover is fixed by the flange.
Furthermore, an accommodating ring is formed between the side wall of the shell and the flange, and a connecting ring fixed on the accommodating ring is arranged on the second electrode leading-out end cover.
Further, a second sealing element is arranged between the second electrode leading-out end cover and the flanging.
Further, the boss and the first collector plate are integrally formed in a punch forming mode; or, the boss is welded to the central part of the first collector plate in a laser welding mode.
Compared with the prior art, the cylindrical lithium battery provided by the invention has no rolling groove sealing structure of the traditional cylindrical battery, the outer surface of the cylindrical shell has no concave or convex deformation, and the opening end of the cylindrical lithium battery is hermetically connected with the shell through the second electrode leading-out end cover to realize the encapsulation of the shell; in the process of rolling a groove and sealing a traditional cylindrical battery, metal deformation can cause pollution of metal dust to the interior of the battery; the structure of the invention completely avoids the generation of metal dust in the battery sealing process, thereby avoiding the self-discharge and internal short circuit phenomena of the battery caused by the metal dust generated in the battery sealing process.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a cylindrical lithium battery provided in an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is an enlarged view of a portion of FIG. 1 at B;
fig. 4 is a partially enlarged view of C in fig. 1.
Wherein, in the figures, the respective reference numerals:
1-a shell; 11-a closed end; 111-a first via; 12-an open end; 122-flanging; 123-a containment ring; 2-an electrical core assembly; 21-a first electrode end; 211-concave surface; 22-a second electrode end; 3-a first collector plate; 31-a boss; 311-a second via; 32-a convex part; 4-first electrode leading-out end cover; 41-groove; 42-a connecting ring; 5-a second electrode leading-out end cover; 6-a first seal; 7-second seal.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, a cylindrical lithium battery according to the present invention is now described, the cylindrical lithium battery including: the cylindrical shell 1 is provided with an opening end and a closed end opposite to the opening end, and a first through hole 111 is formed in the center of the end face of the closed end; the electric core assembly 2 is arranged in the shell 1 and comprises a first electrode end 21 close to the closed end 11 and a second electrode end 22 close to the open end 12, and the first electrode end 21 and the second electrode end 22 are different in electric property; a first current collecting plate 3 disposed in the case 1 and connected to the first electrode terminal 21 of the electrode assembly 2, the first current collecting plate 3 having a boss 31 extending from the first through hole 111 to the outside of the case 1 at a central portion thereof; the first electrode leading-out end cover 4 is arranged outside the shell 1 and is connected with the boss 31; and the second electrode leading-out end cover 5 is arranged at the open end 12 of the shell 1, and is connected with the second electrode end 22 of the electric core assembly 2 and the shell 1, and the second electrode leading-out end cover 5 is connected with the shell 1 in a sealing manner. During specific implementation, the electric core component 2 is a winding core formed by winding a positive plate, a negative plate and a diaphragm, the shell 1 can be a steel shell, the boss 31 can be formed by stamping with the first current collecting plate 3 integrally, the boss can also be welded at the central position of the first current collecting plate 3 in a laser welding mode, and the arrangement can be specifically selected according to actual needs. The first electrode terminal 21 may be a positive electrode terminal, and correspondingly, the second electrode terminal 22 is a negative electrode terminal; the first electrode terminal 21 can also be a negative electrode terminal, and correspondingly, the second electrode terminal 22 can be a positive electrode terminal, which is not limited herein and can be selectively arranged according to actual needs. For convenience of understanding, the first electrode terminal 21 is taken as a positive electrode terminal, and the second electrode terminal 22 is taken as a negative electrode terminal. The first electrode end 21 is connected with the first current collecting plate 3, the positive electrode of the first electrode end 21 is guided onto the first current collecting plate 3, because the central part of the first current collecting plate 3 is provided with a boss 31 extending from the first through hole 111 to the outside of the casing 1, and the first electrode leading-out end cover 4 is connected with the boss 31, the positive electrode on the first current collecting plate 3 is guided onto the first electrode leading-out end cover 4 outside the casing 1 through the boss 31; the second electrode leading-out end cover 5 is connected with the second electrode end 22 and the shell 1, so that the negative electrode of the second electrode end 22 can be led out to the shell 1 through the second electrode leading-out end cover 5, at the moment, the first electrode leading-out end cover 4 which is positioned outside the shell 1 and close to the closed end 11 of the shell 1 is different from the electrodes carried by the closed end 11 of the shell 1, and therefore the positive electrode and the negative electrode can be led out from the same end of the shell 1, and the installation and the overhaul of the cylindrical lithium battery on a power automobile are facilitated. Similarly, when the first electrode terminal 21 is a negative electrode terminal and the second electrode terminal 22 is a positive electrode terminal, the leading-out of the positive electrode and the leading-out of the negative electrode of the electrode are just opposite, and the description thereof is omitted.
Compared with the prior art, the cylindrical lithium battery provided by the invention has no rolling groove sealing structure of the traditional cylindrical battery, the outer surface of the cylindrical shell 1 has no concave or convex deformation, and the open end 12 of the cylindrical lithium battery is hermetically connected with the shell 1 through the second electrode leading-out end cover 5 to realize the encapsulation of the shell 1; in the process of rolling a groove and sealing a traditional cylindrical battery, metal deformation can cause pollution of metal dust to the interior of the battery; the structure of the invention completely avoids the generation of metal dust in the sealing process of the cylindrical lithium battery, thereby avoiding the self-discharge and internal short circuit of the battery caused by the metal dust generated in the sealing process of the cylindrical lithium battery.
In one embodiment, a second current collecting plate (not shown) is arranged between the second electrode leading end cap 5 and the second electrode end 22 of the electric core assembly 2. In specific implementation, for a cylindrical lithium battery with a second collector plate and a second electrode leading-out end cover 5 integrated, the second electrode leading-out end cover 5 is directly connected with a second electrode end 22 of the electrode core assembly 2; for the cylindrical lithium battery with the second current collecting plate and the second electrode leading-out end cover 5 separately arranged, the second electrode leading-out end cover 5 is connected with the second electrode end 22 of the electrode core assembly 2 through the second current collecting plate, and the second electrode leading-out end cover can be specifically and selectively arranged according to actual needs.
In an embodiment, referring to fig. 2, the boss 31 is provided with a second through hole 311 for filling the electrolyte. By providing the second through hole 311, when it is necessary to inject the electrolyte into the electric core assembly 2, the electrolyte can be injected into the electric core assembly 2 through the second through hole 311.
In an embodiment, the first electrode leading end cap 4 is provided with a groove 41 corresponding to the boss 31 for positioning the first electrode leading end cap 4. Through set up the recess 41 corresponding with boss 31 on first electrode extraction end cover 4 to and the cooperation of recess 41 and boss 31, when installing first electrode extraction end cover 4, can conveniently fix a position first electrode extraction end cover 4, improve the stability of first electrode extraction end cover 4 installation.
In one embodiment, the cylindrical lithium battery further includes a first sealing member 6, and the first sealing member 6 is disposed between the first current collecting plate 3 and the closed end 11 of the case 1. In specific implementation, because the casing 1 is different from the electrodes carried by the first electrode leading-out end cover 4 and the closed end 11 of the casing 1, that is, the electrodes carried by the first current collecting plate 3 and the closed end 11 of the casing 1 are also different, the first sealing member 6 is arranged between the first current collecting plate 3 and the closed end 11 of the casing 1, so that not only can the sealing between the first current collecting plate 3 and the closed end 11 of the casing 1 be realized, but also the first current collecting plate 3 and the casing 1 can be insulated, and the short circuit of the cylindrical lithium battery can be prevented.
In one embodiment, the first electrode terminal 21 is provided with a plurality of concave surfaces 211, the first current collecting plate 3 is provided with a plurality of convex portions 32 protruding toward the concave surfaces 211, and the plurality of convex portions 32 are fitted into the plurality of concave surfaces 211 to be fixed. During concrete implementation, set up a plurality of convex parts 32 on first current collector 3, convex part 32 is towards concave surface 211 protrusion, thereby can put into concave surface 211 with fixed, make first current collector 3 fixed with the better location of electric core subassembly 2 terminal surfaces, the laser welding of being convenient for, the production efficiency of product has been improved, and then the manufacturing cost of product has been reduced, the market competitiveness of product has been improved, form the welded plate after comparing current battery utmost point group terminal surface whole to be rubbed flat, the battery utmost point group terminal surface that corresponds with convex part 32 that sets up on first current collector 3 is rubbed the square and is just welded, other parts of electric core subassembly 2 terminal surfaces still are erect the state, electrolyte is more permeable, improve electrolyte permeation efficiency. Preferably, each protrusion 32 extends along the radius direction of the first current collecting plate 3, i.e. is arranged in a reflective manner from the center of the first current collecting plate 3 to the circumferential direction of the first current collecting plate 3, so that it is more stable and reliable when it is matched with the end face of the current core assembly 2.
In one embodiment, referring to fig. 3 in combination, the open end 12 of the housing 1 is provided with a flange 122 facing the inside of the housing 1, and the flange 122 fixes the second electrode lead-out end cap 5. By providing the flange 122 facing the inside of the case 1 at the open end 12 of the case 1, not only the second electrode leading end cap 5 can be fixed, but also the function of sealing the open end 12 of the case 1 can be achieved. The connection mode of the second electrode leading-out end cap 5 and the electric core assembly 2 can be various, for example, the connection mode of the first current collecting plate 3 and the electric core assembly 2 can be adopted, specifically, a plurality of concave surfaces 211 can be arranged at one end of the electric core assembly 2 close to the second electrode leading-out end cap 5, protrusions matched with the plurality of concave surfaces 211 are arranged on the second electrode leading-out end cap 5, and the concave surfaces 211 are arranged through the protrusions to fix. Of course, the connection between the second electrode leading-out end cap 5 and the electric core assembly 2 can also adopt other ways, and those skilled in the art can select the arrangement according to the actual needs.
Further, referring to fig. 4, as a specific embodiment of the cylindrical lithium battery provided by the present invention, an accommodating ring 123 is formed between the sidewall of the casing 1 and the flange 122, and the second electrode leading end cap 5 is provided with a connecting ring 42 fixed to the accommodating ring 123. The connecting ring 42 can be fixed to the accommodating ring 123 in various ways, for example, the connecting ring 42 can be welded in the accommodating ring 123, and the connecting ring 42 can be in interference fit or snap fit with the accommodating ring 123 as long as the connecting ring 42 can be fixed to the accommodating ring 123; of course, it can be understood that the housing 1 can also be fixed by welding the flange 122 directly to the second electrode leading end cap 5, and those skilled in the art can select the arrangement according to the actual requirement.
In one embodiment, a second seal 7 is provided between the second electrode lead end cap 5 and the flange 122. By the provision of the second sealing member 7, the inner space of the cylindrical lithium battery and the outer space of the cylindrical lithium battery can be isolated.
In one embodiment, the boss 31 is laser welded to the first electrode lead end cap 4. Through drawing forth 4 laser welds of end cover with boss 31 and first electrode, can guarantee better that boss 31 and first electrode draw forth the fixed connection between the end cover 4, can also seal the second through-hole 311 that supplies the electrolyte to pour into simultaneously, avoid appearing boss 31 and first electrode in the use or transportation and draw forth the connection between the end cover 4 and take place not hard up, and appear that electrolyte spills over the problem that the cylindrical lithium cell function is influenced.
In one embodiment, the boss 31 is integrally stamped and formed with the first collector plate 3; alternatively, the boss 31 is welded to the center of the first collector plate 3 by laser welding.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A cylindrical lithium battery, comprising:
the cylindrical shell is provided with an opening end and a closed end opposite to the opening end, and a first through hole is formed in the center of the end face of the closed end;
the electric core assembly is arranged in the shell and comprises a first electrode end close to the closed end and a second electrode end close to the open end, and the first electrode end and the second electrode end are different in electric property;
the first current collecting plate is arranged in the shell and connected with the first electrode end of the electric core assembly, and a boss extending from the first through hole to the outside of the shell is arranged at the central part of the first current collecting plate;
the first electrode leading-out end cover is arranged outside the shell and is connected with the boss;
the second electrode leading-out end cover is arranged on the shell, the open end of the shell is connected with the second electrode end of the electric core assembly and the shell, and the second electrode leading-out end cover is connected with the shell in a sealing mode.
2. A cylindrical lithium battery as claimed in claim 1, wherein a second current collecting plate is provided between said second electrode lead-out end cap and said second electrode terminal of said cell assembly.
3. The cylindrical lithium battery as claimed in claim 1 or 2, wherein the boss is provided with a second through-hole for electrolyte injection.
4. The cylindrical lithium battery of claim 1 wherein the first electrode lead-out end cap defines a recess corresponding to the boss for locating the first electrode lead-out end cap.
5. A cylindrical lithium battery as claimed in claim 1, further comprising a first seal member disposed between said first current collector and said closed end of said casing.
6. A cylindrical lithium battery according to claim 1, wherein the first electrode terminal is provided with a plurality of concave surfaces, and the first current collecting plate is provided with a plurality of convex portions protruding toward the concave surfaces, the plurality of convex portions being fitted into the plurality of concave surfaces to be fixed.
7. The cylindrical lithium battery of claim 1 wherein the open end of the casing is provided with a flange facing the inside of the casing, the flange securing the second electrode lead-out end cap.
8. The cylindrical lithium battery as claimed in claim 7, wherein a receiving ring is formed between the side wall of the case and the flange, and the second electrode lead-out end cap is provided with a connection ring fixed to the receiving ring.
9. The cylindrical lithium battery as claimed in claim 7, wherein a second sealing member is provided between the second electrode lead-out end cap and the flange.
10. The cylindrical lithium battery of claim 1, wherein the boss is integrally press-molded with the first current collecting plate; or, the boss is welded to the central part of the first collector plate in a laser welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110758260.5A CN113540624A (en) | 2021-07-05 | 2021-07-05 | Cylindrical lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110758260.5A CN113540624A (en) | 2021-07-05 | 2021-07-05 | Cylindrical lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113540624A true CN113540624A (en) | 2021-10-22 |
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ID=78126784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110758260.5A Pending CN113540624A (en) | 2021-07-05 | 2021-07-05 | Cylindrical lithium battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN113540624A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204171A (en) * | 2021-11-24 | 2022-03-18 | 深圳市比克动力电池有限公司 | Preparation method of battery and cylindrical lithium battery |
| WO2023140454A1 (en) * | 2022-01-19 | 2023-07-27 | 삼성에스디아이 (주) | Secondary battery |
| DE102022109888A1 (en) | 2022-04-25 | 2023-10-26 | Bayerische Motoren Werke Aktiengesellschaft | Energy storage cell with integrated fire protection element |
-
2021
- 2021-07-05 CN CN202110758260.5A patent/CN113540624A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204171A (en) * | 2021-11-24 | 2022-03-18 | 深圳市比克动力电池有限公司 | Preparation method of battery and cylindrical lithium battery |
| CN114204171B (en) * | 2021-11-24 | 2024-08-09 | 深圳市比克动力电池有限公司 | Preparation method of battery and cylindrical lithium battery |
| WO2023140454A1 (en) * | 2022-01-19 | 2023-07-27 | 삼성에스디아이 (주) | Secondary battery |
| DE102022109888A1 (en) | 2022-04-25 | 2023-10-26 | Bayerische Motoren Werke Aktiengesellschaft | Energy storage cell with integrated fire protection element |
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