CN212517429U

CN212517429U - Explosion-proof cap of lithium cell

Info

Publication number: CN212517429U
Application number: CN202020891790.8U
Authority: CN
Inventors: 郑华峰
Original assignee: Individual
Current assignee: Li Hui
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-02-09
Anticipated expiration: 2030-05-25

Abstract

The utility model relates to a lithium battery technology field just discloses an explosion-proof cap of lithium cell, including lithium cell casing, first mounting groove has been seted up in lithium cell casing left side, fixed mounting has the lithium cell in the first mounting groove, lithium cell casing left side fixed mounting has the encapsulation end cover, the second mounting groove has been seted up on encapsulation end cover right side, encapsulation end cover left side fixedly connected with fixing base, the through-hole has been seted up in the fixing base left side, encapsulation end cover right side fixedly connected with runs through the encapsulation end cover and extends to the through-hole in and be located the explosion-proof cap in the second mounting groove, fixing base left side threaded connection has the visor, the thread groove with fixing base looks adaptation is seted up on the visor right side. This explosion-proof cap of lithium cell has solved only the terminal on the current lithium cell closing cap, does not have explosion-proof cap, so receive the temperature rise when leading to pressure increase in the battery, arouse the battery case to burst easily, cause the explosion, have the problem of potential safety hazard.

Description

Explosion-proof cap of lithium cell

Technical Field

The utility model relates to a lithium cell technical field specifically is an explosion-proof cap of lithium cell.

Background

Lithium batteries are batteries which use lithium metal or lithium alloy as positive and negative electrode materials and use non-aqueous electrolyte solution, and generally have two shapes: the battery is cylindrical or square, the inside of the battery adopts a spiral winding structure, polyethylene film isolating materials with very fine and strong permeability are used for spacing between a positive electrode and a negative electrode, the positive electrode comprises a current collector consisting of lithium cobaltate (or lithium nickel cobalt manganese oxide, lithium manganate, lithium iron phosphate and the like) and an aluminum foil, the negative electrode consists of a current collector consisting of a graphitized carbon material and a copper foil, and the battery is filled with organic electrolyte solution.

The existing lithium battery sealing cover is only provided with a binding post and is not provided with an explosion-proof cap, so that when the pressure in the battery is increased due to the rise of temperature, the explosion of a battery shell is easily caused, the potential safety hazard exists, and the problem is solved by providing the explosion-proof cap for the lithium battery.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a lithium cell explosion-proof cap, possess can in time discharge battery internal pressure and can avoid the user to miss the advantage that explosion-proof cap caused explosion-proof cap to damage, solved only the terminal on the current lithium cell closing cap, do not have explosion-proof cap, so receive the temperature rise when leading to the pressure increase in the battery, arouse the battery case to burst easily, cause the explosion, have the problem of potential safety hazard.

(II) technical scheme

For realize the aforesaid can in time discharge battery internal pressure and can avoid the user mistake to touch the purpose that explosion-proof cap caused explosion-proof cap to damage, the utility model provides a following technical scheme: an explosion-proof cap of a lithium battery comprises a lithium battery shell, wherein a first mounting groove is formed in the left side of the lithium battery shell, a lithium battery core is fixedly mounted in the first mounting groove, a packaging end cover is fixedly mounted in the left side of the lithium battery shell, a second mounting groove is formed in the right side of the packaging end cover, a fixing seat is fixedly connected to the left side of the packaging end cover, a through hole is formed in the left side of the fixing seat, an explosion-proof cap which penetrates through the packaging end cover, extends into the through hole and is positioned in the second mounting groove is fixedly connected to the right side of the packaging end cover, a protective cover is in threaded connection with the left side of the fixing seat, a threaded groove matched with the fixing seat is formed in the right side of the protective cover, exhaust holes communicated with the threaded groove are formed in the top and the bottom of, encapsulation end cover left side fixedly connected with is located the fixing base bottom and runs through the encapsulation end cover and extends to the negative pole double-screw bolt in the second mounting groove, encapsulation end cover left side fixedly connected with is located the fixing base top and runs through the encapsulation end cover and extends to the anodal double-screw bolt in the second mounting groove, equal threaded connection has coupling nut outside negative pole double-screw bolt and the anodal double-screw bolt.

Preferably, the lithium battery shell and the packaging end cover are both aluminum shells, and the outer diameter of the lithium battery shell is equal to that of the packaging end cover.

Preferably, the inner diameter of the first mounting groove is equal to the inner diameter of the second mounting groove, and the outer wall of the fixing seat is provided with threads.

Preferably, the distance between the exhaust hole and the right end face of the protective cover is greater than the length of the fixed seat, the diameter of the glass observation window is greater than the aperture of the through hole, and the circle center of the glass observation window and the circle center of the through hole are on the same horizontal straight line.

Preferably, the negative pole of the lithium battery core is electrically connected with the negative pole stud, and the positive pole of the lithium battery core is electrically connected with the positive pole stud.

Preferably, the fixing seat is located between the negative stud and the positive stud, and the right side of the explosion-proof cap is provided with an explosion-proof indentation which is annular.

(III) advantageous effects

Compared with the prior art, the utility model provides an explosion-proof cap of lithium cell possesses following beneficial effect:

the explosion-proof cap of the lithium battery is provided with the explosion-proof cap, the right side of the explosion-proof cap is provided with the explosion-proof indentation, the shell at the explosion-proof indentation is thin, when the pressure in the battery is higher, the explosion-proof indentation can crack under the action of the pressure, so that the internal gas is discharged, the explosion is prevented, when a user uses the lithium battery, the protective cover is in threaded connection with the fixed seat through threads, the user can not mistakenly touch the explosion-proof cap to cause the damage of the explosion-proof cap, meanwhile, the chemical liquid in the battery can be prevented from flowing and scattering around when the explosion-proof cap is broken, the gas in the lithium battery can be discharged in time through the arrangement of the vent holes, the condition of the explosion-proof cap can be conveniently observed by the user through the arrangement of the glass observation window, so that the internal pressure of the battery can be discharged in time, and the damage of the explosion, therefore, the problems that only a binding post is arranged on the existing lithium battery sealing cover and an explosion-proof cap is not arranged, so that when the pressure is increased due to the rise of the temperature in the battery, the battery shell is easy to burst, explosion is caused, and potential safety hazards exist are solved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial cross-sectional view of the present invention;

fig. 3 is a partially enlarged schematic view of a portion a shown in fig. 2 according to the present invention.

In the figure: the lithium battery comprises a lithium battery shell 1, a first mounting groove 2, a lithium battery core 3, a packaging end cover 4, a second mounting groove 5, a fixing seat 6, a through hole 7, an explosion-proof cap 8, a protective cover 9, a thread groove 10, an exhaust hole 11, a mounting hole 12, a glass observation window 13, a negative stud 14, a positive stud 15 and a connecting nut 16.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, an explosion-proof cap for lithium battery comprises a lithium battery shell 1, a first mounting groove 2 is formed in the left side of the lithium battery shell 1, a lithium battery core 3 is fixedly mounted in the first mounting groove 2, a packaging end cover 4 is fixedly mounted on the left side of the lithium battery shell 1, the lithium battery shell 1 and the packaging end cover 4 are both aluminum shells, the outer diameter of the lithium battery shell 1 is equal to the outer diameter of the packaging end cover 4, a second mounting groove 5 is formed in the right side of the packaging end cover 4, the inner diameter of the first mounting groove 2 is equal to the inner diameter of the second mounting groove 5, a fixing seat 6 is fixedly connected to the left side of the packaging end cover 4, a thread is formed on the outer wall of the fixing seat 6, a through hole 7 is formed in the left side of the fixing seat 6, an explosion-proof cap 8, the explosion-proof indentation is annular, the left side of the fixing seat 6 is in threaded connection with the protective cover 9, the right side of the protective cover 9 is provided with a thread groove 10 matched with the fixing seat 6, the top and the bottom of the protective cover 9 are both provided with exhaust holes 11 communicated with the thread groove 10, the distance between the exhaust holes 11 and the right end face of the protective cover 9 is greater than the length of the fixing seat 6, the left side of the protective cover 9 is provided with a mounting hole 12 communicated with the thread groove 10, a glass observation window 13 positioned in the mounting hole 12 is fixedly installed in the protective cover 9, the diameter of the glass observation window 13 is greater than the aperture of the through hole 7, the circle center of the glass observation window 13 and the circle center of the through hole 7 are on the same horizontal straight line, the left side of the packaging end cover 4 is fixedly connected with a negative pole stud 14 positioned at the bottom of the fixing seat 6 and penetrating through the packaging end cover 4 and extending into the second mounting groove And the positive pole stud 15 is arranged in the two mounting grooves 5, the positive pole of the lithium battery cell 3 is electrically connected with the positive pole stud 15, the fixing seat 6 is positioned between the negative pole stud 14 and the positive pole stud 15, and the negative pole stud 14 and the positive pole stud 15 are both in threaded connection with a connecting nut 16.

When in use, the explosion-proof cap 8 is arranged, and the shell at the explosion-proof indentation is thinner because the explosion-proof indentation is arranged at the right side of the explosion-proof cap 8, when the pressure in the battery is higher, the explosion-proof indentation will crack under the action of the pressure to discharge the internal gas, thereby preventing burst, and through the arrangement of the protective cover 9 and the fixed seat 6, when a user uses the lithium battery, the protective cover 9 is in threaded connection with the fixed seat 6 through threads, so that a user cannot touch the explosion-proof cap 8 by mistake to damage the explosion-proof cap 8, meanwhile, chemical liquid in the battery can be prevented from flowing around when the explosion-proof cap 8 is broken, and by arranging the vent holes 11, the gas in the lithium battery can be discharged in time, the situation of the explosion-proof cap 8 can be conveniently observed by a user through the glass observation window 13, thereby reached and in time discharged battery internal pressure and can avoid the user to miss the purpose that explosion-proof cap caused explosion-proof cap to damage.

In conclusion, the lithium battery explosion-proof cap is provided with the explosion-proof cap 8, the right side of the explosion-proof cap 8 is provided with the explosion-proof indentation, the shell at the explosion-proof indentation is thin, when the pressure in the battery is higher, the explosion-proof indentation can crack under the action of the pressure, so that the internal gas is discharged, and the explosion is prevented, the protective cover 9 and the fixing seat 6 are arranged, when a user uses the lithium battery, the protective cover 9 is in threaded connection with the fixing seat 6 through threads, so that the user cannot mistakenly touch the explosion-proof cap 8 to cause the breakage of the explosion-proof cap 8, and simultaneously, chemical liquid in the battery can be prevented from flowing and scattering around when the explosion-proof cap 8 is broken, the gas in the lithium battery can be discharged in time through the vent holes 11, the user can conveniently observe the condition of the explosion-proof cap 8 through the glass observation window 13, so that the internal pressure of the battery can be discharged in time, and the damage of the explosion, therefore, the problems that only a binding post is arranged on the existing lithium battery sealing cover and an explosion-proof cap is not arranged, so that when the pressure is increased due to the rise of the temperature in the battery, the battery shell is easy to burst, explosion is caused, and potential safety hazards exist are solved.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an explosion-proof cap of lithium cell, includes lithium cell shell (1), its characterized in that: the lithium battery shell is characterized in that a first mounting groove (2) is formed in the left side of the lithium battery shell (1), a lithium battery core (3) is fixedly mounted in the first mounting groove (2), a packaging end cover (4) is fixedly mounted on the left side of the lithium battery shell (1), a second mounting groove (5) is formed in the right side of the packaging end cover (4), a fixing seat (6) is fixedly connected to the left side of the packaging end cover (4), a through hole (7) is formed in the left side of the fixing seat (6), an explosion-proof cap (8) which penetrates through the packaging end cover (4), extends into the through hole (7) and is positioned in the second mounting groove (5) is fixedly connected to the right side of the packaging end cover (4), a protective cover (9) is in threaded connection with the left side of the fixing seat (6), a thread groove (10) matched with the fixing seat (6) is formed in the right side of the, mounting hole (12) that are linked together with thread groove (10) are seted up on visor (9) left side, fixed mounting has glass observation window (13) that is located mounting hole (12) in visor (9), encapsulation end cover (4) left side fixedly connected with is located fixing base (6) bottom and runs through encapsulation end cover (4) and extends to negative pole double-screw bolt (14) in second mounting groove (5), encapsulation end cover (4) left side fixedly connected with is located fixing base (6) top and runs through encapsulation end cover (4) and extends to positive pole double-screw bolt (15) in second mounting groove (5), negative pole double-screw bolt (14) and positive pole double-screw bolt (15) outer equal threaded connection have coupling nut (16).

2. The lithium battery explosion-proof cap according to claim 1, wherein: the lithium battery shell (1) and the packaging end cover (4) are both aluminum shells, and the outer diameter of the lithium battery shell (1) is equal to that of the packaging end cover (4).

3. The lithium battery explosion-proof cap according to claim 1, wherein: the internal diameter of first mounting groove (2) equals the internal diameter of second mounting groove (5), fixing base (6) outer wall is seted up threadedly.

4. The lithium battery explosion-proof cap according to claim 1, wherein: the distance between the exhaust hole (11) and the right end face of the protective cover (9) is greater than the length of the fixed seat (6), the diameter of the glass observation window (13) is greater than the aperture of the through hole (7), and the circle center of the glass observation window (13) and the circle center of the through hole (7) are on the same horizontal straight line.

5. The lithium battery explosion-proof cap according to claim 1, wherein: the cathode of the lithium battery core (3) is electrically connected with the cathode stud (14), and the anode of the lithium battery core (3) is electrically connected with the anode stud (15).

6. The lithium battery explosion-proof cap according to claim 1, wherein: the fixing seat (6) is located between the negative stud (14) and the positive stud (15), the right side of the explosion-proof cap (8) is provided with an explosion-proof indentation, and the explosion-proof indentation is annular.