CN215933777U

CN215933777U - High-rate large-capacity simple battery sealing cover and cylindrical battery

Info

Publication number: CN215933777U
Application number: CN202122038439.1U
Authority: CN
Inventors: 丁坤; 王正伟; 王永琛; 刘付召
Original assignee: Phylion Battery Co Ltd
Current assignee: Phylion Battery Co Ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-03-01
Anticipated expiration: 2031-08-25

Abstract

The utility model relates to a high-magnification large-capacity simple battery sealing cover and a cylindrical battery, which comprise a cover plate, wherein one side of the cover plate is provided with a safety valve hole, the safety valve hole is sealed by a safety valve plate, the center of the cover plate is provided with an electrode hole, a pole column penetrates through the electrode hole, an insulating sealing element is arranged between the pole column and the cover plate, the pole column is connected with a first electrode through a first pole lug, an insulating support is arranged below the cover plate, the insulating support is provided with a avoidance hole matched with the safety valve hole and the center hole, and the cover plate penetrates through the insulating support and is fixedly connected with a second electrode. The utility model integrates the positive electrode and the negative electrode at one end, saves structural members, simplifies the structure, and uses the cover plate as an electrode, thereby leading the overcurrent to be larger and realizing the charge and discharge with large multiplying power.

Description

High-rate large-capacity simple battery sealing cover and cylindrical battery

Technical Field

The utility model relates to the technical field of cylindrical batteries, in particular to a high-rate high-capacity simple battery sealing cover and a cylindrical battery.

Background

A battery is an energy conversion and storage device that converts chemical or physical energy into electrical energy by reaction. The battery is a chemical power source, which is composed of two electrochemical active electrodes with different components to form positive and negative electrodes, the two electrodes are soaked in electrolyte capable of providing medium conduction, and when the two electrodes are connected to an external carrier, the energy is provided by converting the chemical energy in the two electrodes.

The current batteries with the same type are basically consistent in structure, lugs are usually arranged on two sides of the batteries, and positive and negative cover plates are independently assembled to form a component, so that the structure quantity is large, the process is complex, the forming process is multiple, the capacity of the batteries is inversely proportional to the internal structure of the batteries due to the fixed reason of the structure and the volume of the batteries, and therefore when the batteries are used for supplying power to electrical equipment with large power, the batteries with the same type are required to supply power, the quantity of the batteries is increased, and the expense is increased. In order to solve the problems, the high-capacity battery with the end-out lug is adopted in the prior art, and the energy storage dotting mode is adopted for welding, but the structural form can only be used for low-current discharging, the temperature rise is high during high-current discharging, and the service life and the safety of the existing battery cannot be ensured.

It is therefore desirable to design a high rate discharge battery with a simple structure.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defects of small battery capacity and small discharge current in the prior art, and provide the high-rate large-capacity simple battery sealing cover and the cylindrical battery, which have simple structures and can realize high-rate charge and discharge.

In order to solve the technical problem, the utility model provides a high-magnification large-capacity simple battery sealing cover which comprises a cover plate, wherein a safety valve hole is formed in one side of the cover plate and is sealed by a safety valve plate, an electrode hole is formed in the center of the cover plate, a pole column penetrates through the electrode hole, an insulating sealing element is arranged between the pole column and the cover plate, the pole column is connected with a first electrode through a first pole lug, an insulating support is arranged below the cover plate, a avoiding hole matched with the safety valve hole and the center hole is formed in the insulating support, and the cover plate penetrates through the insulating support and is fixedly connected with a second electrode.

Preferably, the cover plate and the second electrode are fixed by laser welding.

Preferably, the cover plate is provided with a groove which is recessed downwards, the insulating support is provided with a connecting hole matched with the groove, and the bottom surface of the groove penetrates through the connecting hole to be fixedly connected with the second electrode.

Preferably, the cover plate is connected with a second electrode through a second tab, the second tab is of a circular ring structure, a tab step extends upwards from an inner ring of the second tab, and the cover plate is fixed with the tab step.

Preferably, positioning grooves are formed below the cover plate corresponding to the electrode holes in the periphery, and positioning protrusions corresponding to the positioning grooves are formed in the insulating support.

Preferably, the grooves are symmetrically arranged on two sides of the electrode hole.

Preferably, the cover plate is connected to the second electrode through a second tab, a projection of a side surface of the second tab is a zigzag structure, one end of the second tab penetrates through the insulating support and is fixedly connected with the cover plate, and the other end of the second tab is located below the insulating support.

Preferably, the first tab is of an S-shaped structure, one end of the first tab is connected with the pole, and the other end of the first tab is provided with a through hole communicated with the cylindrical battery central tube.

High magnification large capacity utmost point simple cylinder battery is including foretell battery seal lid to and shell and roll up the core subassembly, roll up the core subassembly with be provided with insulating gasket between the shell bottom.

Preferably, the outer edge of the cover plate is provided with an installation step matched with the shell, the installation step is overlapped on the upper edge of the shell, and the cover plate and the shell are welded and fixed.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

the battery sealing cover integrates the positive electrode and the negative electrode at one end, saves structural members, simplifies the structure, and uses the cover plate as an electrode, so that the overcurrent is larger, and the high-rate charge and discharge are realized;

the high-rate large-capacity extremely-simple cylindrical battery integrates the positive electrode and the negative electrode at one end, and the cover plate is used as an electrode, so that the service life and the safety of the battery are improved;

drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which

FIG. 1 is a schematic view of a sealing cap according to an embodiment of the present invention;

FIG. 2 is an exploded view of an embodiment of the present invention;

FIG. 3 is a cross-sectional view of an embodiment of the present invention;

FIG. 4 is an exploded view of a second embodiment of the present invention;

FIG. 5 is a cross-sectional view of a second embodiment of the present invention;

fig. 6 is a schematic view of a first tab of the present invention;

fig. 7 is a cross-sectional view of an embodiment of a cylindrical battery of the present invention;

fig. 8 is a cross-sectional view of a cylindrical battery according to an embodiment of the present invention.

The specification reference numbers indicate: 100. a sealing cover; 110. a cover plate; 111. a safety valve bore; 112. a safety valve plate; 113. an electrode hole; 114. a groove; 115 positioning grooves; 116. mounting a step; 120. a pole column; 130. an insulating seal; 140. an insulating support; 141. avoiding holes; 142. connecting holes; 143. positioning the projection; 150. a first tab; 151. a through hole; 160. a second tab; 161. a tab step; 200. a housing; 300. a core assembly; 400. and an insulating gasket.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 1 and 2, a high-rate, large-capacity and compact battery sealing cap 100 according to an embodiment of the present invention is shown. The battery sealing cover 100 comprises a cover plate 110, wherein the cover plate 110 seals a cylindrical battery, and in order to ensure the safety of the battery in the charging and discharging processes, one side of the cover plate 110 is provided with a safety valve hole 111, and the safety valve hole 111 is sealed by a safety valve plate 112. In this embodiment the apron 110 center is provided with electrode hole 113, wear to be equipped with utmost point post 120 in the electrode hole 113, utmost point post 120 with be provided with insulating seal 130 between the apron 110, first electrode is connected through first utmost point ear 150 to utmost point post 120, because utmost point post 120 is long and thin structure, inconvenient direct fixation utmost point post 120 and first electrode, consequently set up first utmost point ear 150 in this embodiment and draw forth first electrode. An insulating support 140 is arranged below the cover plate 110, a relief hole 141 matched with the safety valve hole 111 and the central hole is formed in the insulating support 140, and the cover plate 110 penetrates through the insulating support 140 and is fixedly connected with the second electrode. I.e., the positive and negative poles of the cylindrical battery are disposed at the same end of the cylindrical battery, and the insulating sealing member 130 separates the terminal post 120 from the cap plate 110 and the first and

second tabs

150 and 160 to prevent short circuit. And the cover plate 110 leads out the other electrode of the cylindrical battery to serve as one electrode of the cylindrical battery, and the contact area between the cover plate 110 and the second electrode is larger, so that the overcurrent value of the large-capacity cylindrical battery can be designed to be larger, overcurrent is prevented, and the capacity and the safety of the battery are considered. Similarly, the positive and negative electrodes of the cylindrical battery are changed from the original arrangement at the two ends to the arrangement at one end, so the structural members originally arranged at the two ends of the cylindrical battery should be also arranged at one end, and in this embodiment, the cover plate 110 is used as an electrode of the cylindrical battery, i.e., the number of the structural members does not need to be increased on the basis of the original sealing cover 100 structure of the cylindrical battery, the number of the structural members is greatly reduced, and the structure of the sealing cover 100 of the cylindrical battery is greatly simplified.

Specifically, because the contact area between the cover plate 110 and the second electrode is larger, the cover plate 110 and the second electrode are fixed by welding, and in order to avoid the problem that the welding heat input is too high and affects the quality of the cylindrical battery, in this embodiment, the cover plate 110 and the second electrode are fixed by laser welding. Laser welding is firmer, and the resistance after welding is lower, guarantees that the connection of apron 110 and second electrode can bear bigger current value, realizes big multiplying power charge-discharge.

Referring to fig. 2 and 3, in the first embodiment of the present invention, since the cover plate 110 is far away from the second electrode, the cover plate 110 is connected to the second electrode through the second tab 160, and the second tab 160 has a circular ring structure, so that the contact area between the second tab 160 and the cover plate 110 and the core assembly 300 is large enough. Since the projection of the circular second tab 160 covers a circle of the insulating support 140, in order to connect the cover plate 110 and the second tab 160, the cover plate 110 is provided with a groove 114 recessed downward, the insulating support 140 is provided with a connecting hole 142 matching with the groove 114, and the bottom surface of the groove 114 passes through the connecting hole 142 and is fixedly connected with the second tab 160. Because the distance between the cover plate 110 and the second tab 160 is relatively long, and the thickness of the cover plate 110 is relatively thin, in order to prevent the excessive downward depression of the groove 114 on the cover plate 110 from causing the insufficient strength of the groove 114, a tab step 161 extends upward from the inner ring of the second tab 160, and the groove 114 is fixed with the tab step 161. Since the tab step 161 extends upward to a certain height, the depth of the downward recess of the groove 114 may be reduced, thereby ensuring the strength of the cap plate 110. In order to ensure the matching of the groove 114 and the insulating support 140 during the assembly, a positioning groove is formed below the cover plate 110 corresponding to the electrode hole 113 for a circle, and the insulating support 140 is provided with a positioning protrusion 143 corresponding to the positioning groove. In this embodiment, the positioning groove is a square groove, and the positioning protrusion 143 is a square protrusion matching with the positioning groove, so that the cover plate 110 and the insulating support 140 do not rotate relatively, and the groove 114 is ensured to match with the connecting hole 142 on the insulating support 140. Further, in order to increase the contact area between the second electrode tab 160 and the cap plate 110 without affecting the strength of the cap plate 110, the grooves 114 are symmetrically disposed on both sides of the electrode hole 113.

Referring to fig. 4 and 5, in a second embodiment of the present invention, the cover plate 110 is a plane, and a certain distance exists between the cover plate and the second electrode, so that the cover plate 110 is connected to the second electrode through the second tab 160, a side projection of the second tab 160 is a zigzag structure, and a top projection is a sector, so that one end of the second tab 160 is higher and the other end is lower, and thus one end of the second tab 160 passes through the insulating support 140 and is fixedly connected to the cover plate 110, and the other end of the second tab 160 is located below the insulating support 140. The insulating support 140 supports both ends of the second tab 160 to ensure that the second tab 160 contacts the cap plate 110 and the core assembly 300, respectively.

Referring to fig. 6, in order to ensure the connection of the first tab 150 with the terminal 120 and the winding core assembly 300, the first tab 150 is of an S-shaped structure, so that the first tab 150 has elasticity along the axial direction of the cylindrical battery, when the first tab 150 has one end connected with the terminal 120, the winding core assembly 300 of the cylindrical battery is abutted against the other end of the first tab 150, and the first tab 150 can be tightly connected with the terminal 120 and the winding core assembly 300. In order to prevent the first tab 150 from blocking the central tube of the cylindrical battery, the first tab 150 is provided with a through hole 151 communicated with the central tube of the cylindrical battery.

Referring to fig. 7 and 8, schematic diagrams of a first embodiment and a second embodiment of a high-rate large-capacity very simple cylindrical battery according to the present invention are shown. The cylindrical battery comprises the battery sealing cover 100, a shell 200 and a winding core assembly 300, wherein an insulating gasket 400 is arranged between the winding core assembly 300 and the bottom of the shell 200, so that short circuit is prevented. Further, in order to facilitate the connection between the cover plate 110 and the housing 200, a positioning groove with an installation step 115 matched with the housing 200 is arranged at the outer edge of the cover plate 110; 116, the mounting step 115 locates the slot; 116 are placed on the upper edge of the housing 200, and the cover plate 110 is welded and fixed with the housing 200. In the first and second embodiments of the present invention, the second tab 160 has a circular ring shape and a zigzag shape, respectively.

In the utility model, the positive electrode and the negative electrode of the cylindrical battery are arranged on the same side, the cover plate 110 is designed into one external conducting electrode, the contact area of the lug and other structural members is increased, and the over-flow is improved, so that the problems related to temperature rise during the high-rate charge and discharge of the battery are avoided, and the service life and the safety of the battery are improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. High magnification large capacity utmost point simple battery seals lid, its characterized in that, including the apron, apron one side is provided with the safety valve hole, the safety valve hole is sealed by the safety valve piece, the apron center is provided with the electrode hole, wear to be equipped with utmost point post in the electrode hole, utmost point post with be provided with insulating seal between the apron, utmost point post passes through first utmost point ear and connects first electrode, the apron below is provided with insulating support, be provided with on the insulating support with the hole of dodging that safety valve hole and centre bore match, the apron passes insulating support fixed connection second electrode.

2. The high-rate, large-capacity, extremely-simple battery sealing cover according to claim 1, characterized in that: the cover plate and the second electrode are fixed by laser welding.

3. The high-rate, large-capacity, extremely-simple battery sealing cover according to claim 1, characterized in that: the cover plate is provided with a groove which is sunken downwards, a connecting hole matched with the groove is formed in the insulating support, and the bottom surface of the groove penetrates through the connecting hole to be fixedly connected with the second electrode.

4. The high-rate, large-capacity, extremely-simple battery seal cover according to claim 3, characterized in that: the cover plate is connected with a second electrode through a second lug, the second lug is of a circular ring structure, a lug step extends upwards from the inner ring of the second lug, and the cover plate is fixed with the lug step.

5. The high-rate, large-capacity, extremely-simple battery seal cover according to claim 4, characterized in that: the electrode plate is characterized in that a positioning groove is formed in the periphery of the electrode hole, corresponding to the lower portion of the cover plate, and a positioning bulge corresponding to the positioning groove is formed in the insulating support.

6. The high-rate, large-capacity, extremely-simple battery seal cover according to claim 3, characterized in that: the grooves are symmetrically arranged on two sides of the electrode hole.

7. The high-rate, large-capacity, extremely-simple battery sealing cover according to claim 1, characterized in that: the cover plate is connected with a second electrode through a second pole lug, the projection of the side surface of the second pole lug is of a Z-shaped structure, one end of the second pole lug penetrates through the insulating support and is fixedly connected with the cover plate, and the other end of the second pole lug is located below the insulating support.

8. The high-rate, large-capacity, extremely-simple battery sealing cover according to claim 1, characterized in that: the first pole lug is of an S-shaped structure, one end of the first pole lug is connected with the pole, and the other end of the first pole lug is provided with a through hole communicated with the cylindrical battery central tube.

9. The high-rate large-capacity extremely simple cylindrical battery is characterized in that: comprising the battery sealing cover according to any one of claims 1-8, and an outer casing and a roll core assembly, wherein an insulating gasket is arranged between the roll core assembly and the bottom of the outer casing.

10. The high-rate, large-capacity, very simple cylindrical battery of claim 9, wherein: the outer edge of the cover plate is provided with an installation step matched with the shell, the installation step is placed on the upper edge of the shell, and the cover plate is fixed with the shell in a welded mode.