CN216720022U

CN216720022U - High-safety high-magnification cylindrical battery

Info

Publication number: CN216720022U
Application number: CN202220237197.0U
Authority: CN
Inventors: 冯树南; 王举; 郭春泰; 何伟; 杨益志; 罗朝晖
Original assignee: Lanjing New Energy Jiaxing Co ltd
Current assignee: Lanjing New Energy Jiaxing Co ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-06-10
Anticipated expiration: 2032-01-28

Abstract

The utility model provides a high-safety high-magnification cylindrical battery, wherein a winding core is fixedly arranged inside a shell through a cover plate assembly, the cover plate assembly comprises an upper cover plate, a lower cover plate and a sealing insulating piece, the periphery of the lower cover plate is hermetically connected to an inner ring at the upper end of the shell through the sealing insulating piece, the lower end of the winding core is fixedly connected to the bottom of the shell through a second bus disc, the upper end of the winding core is fixedly connected to the lower end of the lower cover plate through a first bus disc, the upper cover plate is fixedly arranged at the upper end of the lower cover plate, the outer edge of the upper cover plate is clamped to the inner ring at the upper end of the shell, and the first insulating piece is arranged between the upper cover plate and the lower cover plate. The shell is directly connected with the cathode or anode bus-bar tray, no pole post treatment is carried out on the shell, the cost is reduced, heat can be directly transferred to the shell through the bus-bar tray, the heat transfer efficiency is improved, and meanwhile, the cylindrical winding core is changed into the structure that the anode and the cathode are on the same side by adopting the double-layer design of the upper cover plate and the lower cover plate, so that the production is convenient.

Description

High-safety high-magnification cylindrical battery

Technical Field

The utility model belongs to the field of battery manufacturing, and particularly relates to a high-safety high-magnification cylindrical battery.

Background

The cylindrical battery is a battery with high capacity, long cycle life and wide use environment temperature, and is divided into different systems of lithium iron phosphate, lithium cobaltate, lithium manganate and cobalt-manganese mixed ternary materials, and the shell is divided into a steel shell and a polymer; 1) the traditional cylindrical battery cover plate has a complex structure; the cap is used as a positive electrode, the shell is used as a negative electrode, and the positive electrode and the negative electrode are conductively connected from two ends of the cylindrical battery when the battery module is assembled, so that the design and welding of an external module bus bar are inconvenient; in addition, the power performance of the battery is influenced because the pole lugs are few. 2. In the cylindrical battery in the prior art, the anode and the cathode are all led to the same side by riveting the pole at the bottom of the U-shaped shell, and the riveting of the pole in the shell greatly increases the cost; 3) the traditional cylindrical winding core adopts one or 2 tab structures, so that the resistance is large, and the rate capability of the winding core is poor; 4) the large cylinder adopts a full tab flattening process, firstly, the axial space needs to occupy several millimeters, and in addition, the tab is easy to be reversely inserted and short-circuited in the flattening process, so that the safety risk exists; 5) with the increase of the size of a cylinder, the conventional tab form or structure form is difficult to rapidly conduct heat and transfer heat; 6) the large cylinder structural design generally only has an explosion-proof valve, and measures are not taken in the aspect of preventing overcharge to influence the safety performance of the winding core.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a high-safety high-rate cylindrical battery, so as to solve the problems of the prior art that the cylindrical battery has a complicated structure and the safety performance is low as the diameter of the cylinder increases.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a high safe high magnification cylinder type battery, which comprises a housin, roll up core and apron subassembly, the casing is the tubbiness structure, it passes through inside apron subassembly fixed mounting to the casing to roll up the core, the apron subassembly includes the upper cover plate, apron and sealed insulator down, the apron periphery is through sealed insulator sealing connection to casing upper end inner circle down, the lower extreme of rolling up the core converges through the second and coils fixed connection to the casing bottom, the upper end of rolling up the core converges through the first lower extreme of converging dish fixed connection to apron down, the upper end fixed mounting upper cover plate of apron down, upper cover plate outer fringe joint to casing upper end inner circle, and set up first insulator between upper cover plate and the apron down.

Further, roll up the core and include positive plate, negative plate and barrier film, positive plate and negative plate parallel arrangement each other, and the barrier film is located between positive plate and the negative plate, roll up the core and be the positive plate, negative plate and barrier film superpose the post-forming cylinder structure each other, the upper end of positive plate sets up a plurality of first bosss, and a plurality of first bosss form anodal ear along with the positive plate after convoluteing, the negative plate lower extreme sets up a plurality of second bosss, and a plurality of second bosss form the negative pole ear along with the negative plate after convoluteing, anodal ear fixed connection is to the lower extreme of first disc that converges, negative pole ear fixed connection is to the upper end of second disc that converges.

Furthermore, a second insulating part is arranged between the first confluence disc and the lower cover plate, and one end of the first confluence disc penetrates through the second insulating part and then is fixedly connected to the lower end of the lower cover plate.

Further, the lower cover plate comprises a first plate body and a first groove-shaped boss arranged at the upper end of the first plate body, the outer edge of the first plate body is connected to the inner ring at the upper end of the shell through a sealing insulator in a sealing mode, a liquid injection hole and an explosion-proof nick are arranged on the first groove-shaped boss respectively, a seal nail is installed in the liquid injection hole, the liquid injection hole and the explosion-proof nick do not interfere with each other, a first through hole is further formed in the first plate body, a turnover disc is arranged in the first through hole, the turnover disc is of a concave structure on the first plate body, and the plate body, the turnover disc and the first groove-shaped boss are of a stamping integrated structure.

Further, first dish that converges includes disk body and electrically conductive handle, disk body lower extreme fixed connection to positive ear, the disk body is through the lower extreme of electrically conductive handle fixed connection to first plate body.

Furthermore, a second through hole and a third through hole are formed in the first insulating part, the inner diameter of the third through hole is larger than the outer diameter of the turnover disc, the third through hole and the first through hole are arranged concentrically, and the periphery of the first groove-shaped boss is located in the second through hole.

Further, the upper cover plate comprises a second groove-shaped boss arranged at the timely upper end of the second plate body, the outer edge of the second plate body is clamped to the inner ring at the upper end of the shell, the lower end of the second plate body is connected to the upper end of the lower cover plate through a sealing insulating piece in a contact mode, a fourth through hole is formed in the second plate body, the first groove-shaped boss is located in the fourth through hole, the upper end of the second groove-shaped boss is flush with the upper end of the first groove-shaped boss, a groove is formed in the lower end of the second groove-shaped structure, and the turnover disc is located in the groove.

Furthermore, a positioning column is installed at the bottom of the shell, a positioning hole is formed in the middle of the second confluence disc, and the periphery of the positioning column is located in the positioning hole.

Furthermore, the inner ring at the upper end of the shell is respectively provided with a first clamping table and a second clamping table which are annular, the first clamping table is positioned at the upper end of the second clamping table, the periphery of the confluence disc is fixedly installed between the second clamping table and the roll core, the periphery of the upper cover plate and the periphery of the lower cover plate are fixedly installed between the first clamping table and the second clamping table, and the sealing insulating pieces are positioned between the periphery of the confluence disc and the second clamping table and between the periphery of the lower cover plate and the inner ring of the shell.

Compared with the prior art, the high-safety high-magnification cylindrical battery has the following beneficial effects: the casing and negative pole or anodal converge the dish and directly link, do not do utmost point post processing on the casing, reduce cost, the heat can directly transmit the casing through converging the dish, improve heat transfer efficiency, adopt the double-deck design of upper cover plate and lower apron simultaneously, lower apron and positive pole or negative pole converge the dish welding electrically conductive, the upper cover plate compresses tightly the mode of apron through the roll slot turn-ups, on the electric conductance to the upper cover plate of cylinder casing, the cylinder rolls up the core and becomes positive negative pole at the homonymy, the production of being convenient for improves production efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is an exploded view of a high-safety high-rate cylindrical battery according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a high-safety high-magnification cylindrical battery according to an embodiment of the utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic view of a core structure according to an embodiment of the present invention;

fig. 5 is a schematic structural view of the positive plate according to the embodiment of the present invention;

FIG. 6 is a schematic view of a lower cover plate according to an embodiment of the present invention;

FIG. 7 is a schematic view of a first insulating member according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an upper cover plate according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first bus tray according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a second bus tray according to an embodiment of the present invention.

Description of reference numerals:

1-a shell; 11-a positioning post; 12-a first chuck table; 13-a second chuck; 2-a winding core; 21-a positive plate; 22-positive tab; 3-a first confluence disc; 31-a tray body; 32-a conductive handle; 4-a second confluence disc; 41-positioning holes; 5-lower cover plate; 51-a first plate body; 52-first groove-shaped boss; 53-liquid injection hole; 54-explosion-proof scoring; 55-turning over the disc; 6-a first insulator; 61-a second via; 62-a third via; 7-upper cover plate; 71-a second plate body; 72-a second groove-shaped boss; 73-fourth via; 8-sealing the insulator; 9-second insulator.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1-10, a high-safety high-magnification cylindrical battery comprises a casing 1, a winding core 2 and a cover plate assembly, wherein the casing 1 is a barrel-shaped structure, the winding core 2 is fixedly mounted inside the casing 1 through the cover plate assembly, the cover plate assembly comprises an upper cover plate 7, a lower cover plate 5 and a sealing insulator 8, the periphery of the lower cover plate 5 is hermetically connected to an inner ring at the upper end of the casing 1 through the sealing insulator 8, the lower end of the winding core 2 is fixedly connected to the bottom of the casing 1 through a second bus disc 4, the upper end of the winding core 2 is fixedly connected to the lower end of the lower cover plate 5 through a first bus disc 3, the upper cover plate 7 is fixedly mounted at the upper end of the lower cover plate 5, the outer edge of the upper cover plate 7 is clamped to the inner ring at the upper end of the casing 1, a first insulator 6 is arranged between the upper cover plate 7 and the lower cover plate 5, the casing 1 is directly connected with a cathode or anode bus disc, no post treatment is performed on the casing 1, reduce cost, the heat can directly transmit casing 1 through converging the dish simultaneously, improve heat transfer efficiency, make things convenient for the heat transfer design and the equipment of module or system simultaneously, adopt upper cover plate 7 and lower cover plate 5's double-deck design simultaneously, lower cover plate 5 and anodal or negative pole converge the dish welding electrically conductive, upper cover plate 7 compresses tightly the mode of apron through the roller slot turn-ups, on cylindrical housing 1's conductance arrives upper cover plate 7, the cylinder battery becomes positive negative pole at the homonymy, make things convenient for busbar design and welding of battery when constituteing module or system.

The winding core 2 comprises a positive plate 21, a negative plate and an isolating film, wherein the positive plate 21 and the negative plate are arranged in parallel, the isolating film is positioned between the positive plate 21 and the negative plate, the winding core 2 is a cylindrical structure formed by winding the positive plate 21, the negative plate and the isolating film after being stacked, a plurality of first bosses are arranged at the upper end of the positive plate 21, a positive lug 22 is formed after the first bosses are wound along with the positive plate 21, a plurality of second bosses are arranged at the lower end of the negative plate, a plurality of second bosses form negative lugs after the second bosses are wound along with the negative plate, the positive lug 22 is fixedly connected to the lower end of the first bus plate 3, the negative lug is fixedly connected to the upper end of the second bus plate 4, as shown in figure 5, a multi-lug structure is formed on the positive plate 21 and the negative plate through laser cutting or die cutting, according to the design size and the die cutting distance, the lug width and the lug distance are gradually increased from the inner part of the winding core 2 to the outer part of the winding core 2, the heights of the lugs can be the same or increased, after the lugs of the winding core 2 consisting of the positive plate 21, the negative plate and the isolating film are bent and leveled, the lugs of a radial structure are formed, the shapes can have different numbers, the structure has stacked lugs as shown in figure 5, and gaps are reserved among the lugs, so that the gaps are convenient for the absorption of electrolyte and are used as electrolyte absorption channels of the winding core 2, the electrolyte injection time is greatly shortened, the electrolyte injection efficiency is improved, and the positive and negative pole plates have a multi-lug structure, so that the electric conduction and heat conduction capability is improved compared with that of a single lug or 2 lug structure of a traditional cylindrical battery; meanwhile, a certain gap is formed among the multiple tabs, and gaps exist among the tabs after the tabs are shaped and become channels of electrolyte, so that the electrolyte absorption is facilitated compared with a full-tab kneading square mode.

A second insulating part 9 is arranged between the first confluence disc 3 and the lower cover plate 5, one end of the first confluence disc 3 is fixedly connected to the lower end of the lower cover plate 5 after passing through the second insulating part 9, the first confluence disc 3 and the second confluence disc 4 are respectively welded with two pole tabs of the winding core 2, the surfaces of the first confluence disc 3 and the second confluence disc 4 are uneven, the groove positions are matched with the shapes of the tabs of the winding core 2, the tabs are compressed for laser welding, the center positions are flanged towards the same side and are matched with the center hole position of the winding core 2 for positioning, as shown in figure 9, the first confluence disc 3 comprises a disc body 31 and a conductive handle 32, the lower end of the disc body 31 is fixedly connected to the positive pole tab 22, the disc body 31 is fixedly connected to the lower end of the first plate body 51 through the conductive handle 32, the conductive handle 32 has a raised reinforcing rib structure and notches for convenient bending, the conductive handle 32 can be provided with a plurality of notches, as electrically conductive weak position, exceed certain electric current this position and take place the fusing, the core 2 is rolled up in the fusing disconnection when taking place outside short circuit and produce the heavy current improves the security, the second converges 4 dish that converges unsmooth in surface, the groove position matches with 2 utmost point ear shapes of book core, it is used for laser welding to compress tightly utmost point ear, the second converges 4 middle parts of dish and is equipped with locating

hole

41, 1 bottom installation reference column 11 of casing, the second converges 4 middle parts of dish and is equipped with locating

hole

41, 11 peripheries of reference column are located locating hole 41, the positioning action has been played, the equipment of being convenient for.

The lower cover plate 5 comprises a first plate body 51 and a first groove-shaped boss 52 arranged at the upper end of the first plate body 51, the outer edge of the first plate body 51 is connected to the inner ring at the upper end of the shell 1 in a sealing way through a sealing insulating part 8, the first groove-shaped boss 52 is respectively provided with a liquid injection hole 53 and an explosion-proof nick 54, a seal nail is arranged in the liquid injection hole 53, the liquid injection hole 53 and the explosion-proof nick 54 are not interfered with each other, a first through hole is also arranged on the first plate body 51, a turnover disc 55 is arranged in the first through hole, the turnover disc 55 is of a concave structure on the first plate body 51, the explosion-proof nick 54 is used as an explosion-proof valve, the internal pressure of the winding core 2 can be broken and released under the failure conditions of thermal runaway and the like, gas is generated in the winding core 2 under the overcharging or other abuse conditions, when the pressure reaches a fixed value, the turnover disc 55 is turned over to be outwards protruded from the bulge in the winding core 2, and then is in contact with the upper cover plate 7 to carry out short-circuit discharge after the outwards protruded, the energy of the winding core 2 is released to be in a safe charge state, or when overcharging, the external current flows away through a short circuit, the charge state of the winding core 2 cannot rise any more, so that the overcharge safety is improved, and the plate body, the turnover disc 55 and the first groove-shaped boss 52 are of a stamping integrated structure, so that the production efficiency is improved, and the manufacturing cost is reduced.

The first insulating part 6 is provided with a second through hole 61 and a third through hole 62, the inner diameter of the third through hole 62 is larger than the outer diameter of the turnover disc 55, the third through hole 62 and the first through hole are concentrically arranged, and the periphery of the first groove-shaped boss 52 is positioned in the second through hole 61.

The upper cover plate 7 comprises a second groove-shaped boss 72 arranged at the upper end of the second plate body 71 in time, the outer edge of the second plate body 71 is clamped to the inner ring at the upper end of the shell 1, the lower end of the second plate body 71 is connected to the upper end of the lower cover plate 5 through a sealing insulator 8 in a contact mode, a fourth through hole 73 is formed in the second plate body 71, the first groove-shaped boss 52 is located in the fourth through hole 73, the upper end of the second groove-shaped boss 72 is flush with the upper end of the first groove-shaped boss 52, a groove is formed in the lower end of the second groove-shaped structure, and the turnover disc 55 is located in the groove.

The bottom of the shell 1 is provided with a positioning column 11, the middle of the second confluence disc 4 is provided with a positioning hole 41, and the periphery of the positioning column 11 is positioned in the positioning hole 41.

The inner ring of the upper end of the shell 1 is respectively provided with a first clamping table 12 and a second clamping table 13 in an annular shape, the first clamping table 12 is positioned at the upper end of the second clamping table 13, the periphery of the confluence disc is fixedly arranged between the second clamping table 13 and the winding core 2, the periphery of the upper cover plate 7 and the periphery of the lower cover plate 5 are fixedly arranged between the first clamping table 12 and the second clamping table 13, the sealing insulating piece 8 is positioned between the periphery of the confluence disc and the second clamping table 13 and between the periphery of the lower cover plate 5 and the inner ring of the shell 1, the inner ring of the first clamping table 12 is in contact connection with the periphery of the second groove-shaped boss 72 so as to increase the contact area between the shell 1 and the second groove-shaped boss 72, meanwhile, the lower end of the second groove-shaped boss 72 is provided with a groove, the turnover disc 55 is positioned in the groove, and the groove provides a turnover space for the turnover disc 55.

An assembly process of a high-safety high-magnification cylindrical battery comprises the following steps:

s1, cutting the upper end of the positive plate 21 and the lower end of the negative plate into tooth-shaped structures by a worker through laser;

s2, the worker sequentially superimposes the positive plate 21, the isolation film and the negative plate and winds the positive plate, the isolation film and the negative plate into a cylindrical winding core 2, the electrode lugs are bent and guided in the winding process, all the electrode lugs are bent and inclined towards the center of the winding core 2, the tooth-shaped structure at the upper end of the positive plate 21 is shaped into the positive electrode lug 22, the tooth-shaped structure at the lower end of the negative plate is shaped into the negative electrode lug, and the shaping method is that the multiple electrode lugs on the winding core 2 are flattened and pressed into a planar state;

s3, fixedly connecting the lower end of the first current collecting disc 3 to the positive electrode lug 22 and fixedly connecting the upper end of the second current collecting disc 4 to the negative electrode lug by workers, and positioning and installing the winding core 2 into the shell 1 through the second current collecting disc 4 by the workers;

s4, placing a sealing insulating sheet on the first bus bar disc 3 on one side of the opening end of the shell 1 by a worker to prevent the first bus bar disc 3 from contacting with the shell 1 to cause short circuit, and extruding the shell 1 in the axial direction to form a second clamping table 13 at the position of an inner ring at the upper end of the shell 1 close to the first bus bar disc 3;

s5, fixedly welding the conductive handle 32 of the first confluence disc 3 to the lower end of the lower cover plate 5 by a worker, bending the conductive handle 32, covering the lower cover plate 5 on a platform on the upper edge of the roller groove, and attaching the lower cover plate 5 to the shell 1, wherein an insulating sealing element between the lower cover plate 5 and the shell 1 is preassembled on the lower cover plate 5, and the outer edge of the lower cover plate 5 abuts against the upper end of the second clamping table 13;

s6, sequentially placing the first insulating part 6 and the upper cover plate 7 at the upper end of the lower cover plate 5 by a worker, and flanging the outer edge of the upper end of the shell 1 to form a first clamping table 12, wherein the first clamping table 12 is a fixing structure of the upper cover plate 7 and the lower cover plate 5.

In order to improve the conductive capability of the shell 1 and the upper cover plate 7, the upper cover plate 7 and the first clamping platform 12 can be welded by laser welding, resistance welding, brazing and the like;

the battery assembly process is simple, the shell 1 is directly connected and contacted with the bus disc at the bottom of the winding core 2, heat transfer is easy, and meanwhile, the low resistance is beneficial to the multiplying power performance of the battery; in addition, through two upper and lower apron designs, the electricity of battery is guided to the homonymy, and the design and the connection of busbar when being convenient for constitute module or system improve the security performance simultaneously to design explosion-proof valve and tilting mechanism on the apron.

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 utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a high safe high magnification cylinder type battery which characterized in that: including casing (1), roll up core (2) and apron subassembly, casing (1) is the tubbiness structure, roll up core (2) through apron subassembly fixed mounting to casing (1) inside, the apron subassembly includes upper cover plate (7), lower cover plate (5) and sealed insulator (8), lower cover plate (5) periphery is through sealed insulator (8) sealing connection to casing (1) upper end inner circle, the lower extreme of rolling up core (2) converges dish (4) fixed connection to casing (1) bottom through the second, the upper end of rolling up core (2) is through the lower extreme of first dish (3) fixed connection to lower cover plate (5), the upper end fixed mounting upper cover plate (7) of lower cover plate (5), upper cover plate (7) outer fringe joint to casing (1) upper end inner circle, and set up first insulator (6) between upper cover plate (7) and lower cover plate (5).

2. The cylindrical battery of high safety and high rate according to claim 1, wherein: roll up core (2) and include positive plate (21), negative plate and barrier film, positive plate (21) and the mutual parallel arrangement of negative plate, and the barrier film is located between positive plate (21) and the negative plate, roll up core (2) and be positive plate (21), negative plate and barrier film superpose back coiling shaping's cylinder structure each other, the upper end of positive plate (21) sets up a plurality of first bosss, and a plurality of first bosss form anodal ear (22) along with positive plate (21) coiling back, the negative plate lower extreme sets up a plurality of second bosss, and a plurality of second bosss form the negative pole ear along with the negative plate coiling back, anodal ear (22) fixed connection is to the lower extreme of first dish (3) that converges, negative pole ear fixed connection is to the upper end of second dish (4) that converges.

3. The cylindrical battery of high safety and high rate according to claim 1, wherein: set up second insulator (9) between first dish (3) of converging and apron (5) down, and the one end of first dish (3) of converging passes second insulator (9) back fixed connection to the lower extreme of apron (5) down.

4. The cylindrical battery of high safety and high rate according to claim 1, wherein: lower cover plate (5) are including first plate body (51) and first cell type boss (52) that upper end set up, first plate body (51) outer fringe is through sealed insulating part (8) sealing connection to casing (1) upper end inner circle, be equipped with respectively on first cell type boss (52) and annotate liquid hole (53) and explosion-proof nick (54), install the staple in annotating liquid hole (53), and annotate liquid hole (53) and explosion-proof nick (54) mutually noninterfere, still be equipped with first through-hole on first plate body (51), set up upset disc (55) in the first through-hole, upset disc (55) are sunken type structure on first plate body (51), and the plate body, upset disc (55) and first cell type boss (52) are integrative punching press structure.

5. The high-safety high-rate cylindrical battery as defined in claim 3, wherein: the first bus bar (3) comprises a disc body (31) and a conductive handle (32), the lower end of the disc body (31) is fixedly connected to the positive lug (22), and the disc body (31) is fixedly connected to the lower end of the first plate body (51) through the conductive handle (32).

6. The high-safety high-rate cylindrical battery as defined in claim 4, wherein: the first insulating part (6) is provided with a second through hole (61) and a third through hole (62), the inner diameter of the third through hole (62) is larger than the outer diameter of the turnover disc (55), the third through hole (62) and the first through hole are arranged concentrically, and the periphery of the first groove-shaped boss (52) is positioned in the second through hole (61).

7. The cylindrical battery of high safety and high rate according to claim 6, wherein: the upper cover plate (7) comprises a second plate body (71) and a second groove-shaped boss (72) arranged at the upper end of the second plate body (71), the outer edge of the second plate body (71) is clamped to the inner ring at the upper end of the shell (1), the lower end of the second plate body (71) is connected to the upper end of the lower cover plate (5) through a sealing insulator (8) in a contact mode, a fourth through hole (73) is formed in the second plate body (71), the first groove-shaped boss (52) is located in the fourth through hole (73), the upper end of the second groove-shaped boss (72) is flush with the upper end of the first groove-shaped boss (52), a groove is formed in the lower end of the second groove-shaped structure, and the turnover disc (55) is located in the groove.

8. The cylindrical battery of high safety and high rate according to claim 1, wherein: the bottom of the shell (1) is provided with a positioning column (11), the middle of the second confluence disc (4) is provided with a positioning hole (41), and the periphery of the positioning column (11) is positioned in the positioning hole (41).

9. The cylindrical battery of high safety and high rate according to claim 1, wherein: the inner ring of the upper end of the shell (1) is respectively provided with a first clamping table (12) and a second clamping table (13), the first clamping table (12) is located at the upper end of the second clamping table (13), the periphery of the confluence disc is fixedly installed between the second clamping table (13) and the winding core (2), the upper cover plate (7) is peripheral, the lower cover plate (5) is fixedly installed between the first clamping table (12) and the second clamping table (13), and the sealing insulating piece (8) is located between the periphery of the confluence disc and the second clamping table (13) and between the periphery of the lower cover plate (5) and the inner ring of the shell (1).