CN217823023U - Explosion-proof small-size lithium cell - Google Patents

Abstract

The utility model belongs to the technical field of the lithium cell, and an explosion-proof small-size lithium cell is disclosed, include: the top of the shell is connected with a top cover; the mounting seat is arranged in the shell, and a lithium battery body is fixed on the top side of the mounting seat; through holes symmetrically formed in two ends of the shell, and fixing frames facing the through holes are fixed on two sides of the outer wall of the shell; the inside of fixed frame is provided with the fixed plate, and the one end both sides that fixed frame is close to the casing all are connected with the blast pipe, the one end of fixed plate is fixed with the second spring towards the through-hole, the utility model discloses a cooperation of shutoff head, baffle, second spring, fixed frame and blast pipe isotructure, when intensification and production high temperature pressure rapidly in the casing, can make through-hole and automatic intercommunication of blast pipe to outwards discharge high temperature high-pressure gas, effectively prevented the heat in the casing from piling up, avoided lithium cell body to explode, improved the security greatly.

Description

Explosion-proof small-size lithium cell

Technical Field

The utility model belongs to the technical field of the lithium cell, concretely relates to explosion-proof small-size lithium cell.

Background

Lithium batteries are batteries containing lithium in an electrochemical system, and can be roughly divided into lithium metal batteries and lithium ion batteries, and the lithium metal has very high requirements on the environment for processing, storage and use due to the very active chemical characteristics of the lithium metal.

However, the conventional small lithium battery has many disadvantages in application, for example, the explosion-proof effect is poor, when the lithium battery has a short circuit or other faults, the lithium battery is heated rapidly and the inside of the lithium battery expands, so that the inside of the shell is heated rapidly, a large amount of high-temperature and high-pressure gas is generated, and if the gas is not discharged in time, the battery is extremely easy to explode along with the lapse of time, thereby greatly affecting the safety.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an explosion-proof small-size lithium cell to the explosion-proof effect who proposes in solving above-mentioned background is poor, and high temperature high-pressure gas is difficult to the exhaust problem.

In order to achieve the above purpose, the utility model provides a following technical scheme: an explosion-proof small lithium battery comprising: the top of the shell is connected with a top cover; the mounting seat is arranged in the shell, and a lithium battery body is fixed on the top side of the mounting seat; the shell comprises through holes symmetrically formed in two ends of the shell, and fixing frames facing the through holes are fixed on two sides of the outer wall of the shell; a fixed plate is arranged in the fixed frame, exhaust pipes are connected to two sides of one end, close to the shell, of the fixed frame, a second spring facing the through hole is fixed to one end of the fixed plate, a baffle is connected to one end, opposite to the fixed plate, of the second spring, and a blocking head matched with the through hole is installed on the side wall of the baffle; and the guide rod penetrates between the fixed plate and the second spring, and one end of the guide rod is fixedly connected with the baffle.

Preferably, the explosion-proof small lithium battery further comprises: the sliding columns are symmetrically fixed at two ends of the baffle plate, and the sliding chutes are symmetrically arranged on two sides of the inner wall of the fixed frame; and the sliding column is matched with the sliding groove.

Preferably, the explosion-proof small lithium battery further comprises: the pressing plate is fixed on the bottom side of the top cover; and the bottom side of the pressing plate is abutted against the lithium battery body.

Preferably, still including setting up the telescopic cylinder in first spring, and telescopic cylinder's both ends respectively with top cap and clamp plate fixed connection.

Preferably, the anti-skid device further comprises an insulating pad arranged at the bottom of the pressing plate, and the bottom of the insulating pad is provided with an anti-skid convex line.

Preferably, the anti-skid device further comprises a base plate fixed at the bottom of the shell, and the bottom of the base plate is provided with an anti-skid groove.

Compared with the prior art, the beneficial effects of the utility model are that:

in the utility model, through the matching of the sealing head, the baffle, the second spring, the fixing frame, the exhaust pipe and other structures, when the temperature in the shell rapidly rises and high-temperature pressure is generated, the through hole can be automatically communicated with the exhaust pipe, so that high-temperature and high-pressure gas is discharged outwards, heat accumulation in the shell is effectively prevented, explosion of the lithium battery body is avoided, and the safety is greatly improved;

simultaneously, through the cooperation of traveller and spout, more steady reliable when can making the baffle remove has further reduced and has rocked the incline, has improved stability greatly, and through the cooperation of first spring and clamp plate, can be further to the lithium cell body consolidate the protection to it is not hard up to have avoided the lithium cell body to take place, has improved the security greatly.

Drawings

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

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic structural view of the baffle plate of the present invention when connected to the fixed frame;

FIG. 4 is an enlarged view of portion B of FIG. 1;

in the figure: 1. a lithium battery body; 2. a mounting seat; 3. a housing; 4. a top cover; 5. a first spring; 6. pressing a plate; 7. an exhaust pipe; 8. a fixing frame; 9. a through hole; 10. plugging the head; 11. a baffle plate; 12. a guide bar; 13. a fixing plate; 14. a second spring; 15. a chute; 16. a traveler; 17. a telescopic cylinder.

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 efforts all belong to the protection scope of the present invention.

Referring to fig. 1 to 2, an explosion-proof small lithium battery includes: the top of the shell 3 is connected with a top cover 4; the mounting seat 2 is arranged in the shell 3, and the top side of the mounting seat 2 is fixed with the lithium battery body 1; through holes 9 symmetrically formed at two ends of the shell 3, and fixing frames 8 facing the through holes 9 are fixed on two sides of the outer wall of the shell 3; a fixing plate 13 is arranged inside the fixing frame 8, the two sides of one end, close to the shell 3, of the fixing frame 8 are both connected with the exhaust pipes 7, a second spring 14 facing the through hole 9 is fixed at one end of the fixing plate 13, a baffle plate 11 is connected to one end, opposite to the fixing plate 13, of the second spring 14, and a blocking head 10 matched with the through hole 9 is installed on the side wall of the baffle plate 11; a guide rod 12 penetrating between the fixing plate 13 and the second spring 14, and one end of the guide rod 12 is fixedly connected with the baffle plate 11.

Through the technical scheme:

specifically, when the rapid temperature rise and produce high temperature pressure in casing 3, under inside and outside air pressure difference's effect, powerful atmospheric pressure can promote shutoff head 10 motion, make shutoff head 10 drive baffle 11 and slide in fixed frame 8, then baffle 11 drives guide arm 12 and moves and extrude second spring 14 on fixed plate 13, thereby can make through-hole 9 and blast pipe 7 intercommunication, and then make high temperature high pressure gas pass through-hole 9 and blast pipe 7 automatic outwards discharge, effectively prevented that the heat in casing 3 from piling up, lithium cell body 1 has been avoided exploding, the security has been improved greatly, and high temperature heat discharges the back, under second spring 14's bounce-back, can close through-hole 9 once more, excellent in use effect.

Further, aiming at the shell 3, a base plate can be additionally arranged at the bottom of the shell, and an anti-skid groove is formed in the bottom of the base plate, so that the base plate has the function of supporting and preventing moisture.

Referring to fig. 3 and 4, in the present invention, there is provided a further embodiment, the explosion-proof small lithium battery further comprising: sliding columns 16 symmetrically fixed at two ends of the baffle 11 and sliding chutes 15 symmetrically arranged on two sides of the inner wall of the fixed frame 8; and the sliding column 16 is matched with the sliding chute 15; a plurality of first springs 5 fixed on the bottom side of the top cover 4 and a pressing plate 6 connected to the bottom ends of the first springs 5; and the bottom side of the pressing plate 6 is abutted against the lithium battery body 1.

Through the technical scheme:

specifically, when the device is used, the sliding column 16 is driven by the baffle plate 11 to slide in the sliding groove 15, and under the matching of the sliding column 16 and the sliding groove 15, the baffle plate 11 can move more stably and reliably, the shaking deflection is further reduced, and the stability is greatly improved;

and under the elastic action of the first spring 5, the pressing plate 6 can be tightly propped against the lithium battery body 1 downwards, so that the lithium battery body 1 can be further reinforced and protected, the loosening of the lithium battery body 1 is avoided, and the safety is greatly improved.

Furthermore, the first spring 5 provided as described above may be additionally provided with a telescopic tube 17 inside thereof, and both ends of the telescopic tube 17 are fixedly connected to the top cover 4 and the pressing plate 6, respectively, whereby the first spring 5 can be supported and fixed by the telescopic tube 17.

Furthermore, the bottom of the pressing plate 6 can be provided with an insulating pad, and the bottom of the insulating pad is provided with anti-skid convex lines, so that the insulating pad has an anti-skid function.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various 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 (6)

1. An explosion-proof small lithium battery, comprising:

the top of the shell (3) is connected with a top cover (4);

the mounting seat (2) is arranged in the shell (3), and the top side of the mounting seat (2) is fixed with the lithium battery body (1);

through holes (9) symmetrically formed in two ends of the shell (3), and fixing frames (8) facing the through holes (9) are fixed on two sides of the outer wall of the shell (3);

a fixing plate (13) is arranged inside the fixing frame (8), two sides of one end, close to the shell (3), of the fixing frame (8) are connected with exhaust pipes (7), one end of the fixing plate (13) is fixedly provided with a second spring (14) facing the through hole (9), one end, opposite to the fixing plate (13), of the second spring (14) is connected with a baffle (11), and a blocking head (10) matched with the through hole (9) is installed on the side wall of the baffle (11);

the guide rod (12) penetrates through the space between the fixing plate (13) and the second spring (14), and one end of the guide rod (12) is fixedly connected with the baffle (11).

2. An explosion proof lithium miniature cell as set forth in claim 1, further comprising:

sliding columns (16) symmetrically fixed at two ends of the baffle (11) and sliding chutes (15) symmetrically arranged at two sides of the inner wall of the fixed frame (8);

and the sliding column (16) is matched with the sliding groove (15).

3. An explosion-proof small lithium battery as claimed in claim 2, characterized in that: the explosion-proof small lithium battery further comprises:

a plurality of first springs (5) fixed on the bottom side of the top cover (4) and a pressure plate (6) connected with the bottom ends of the first springs (5);

and the bottom side of the pressing plate (6) is abutted against the lithium battery body (1).

4. An explosion-proof small lithium battery as claimed in claim 3, characterized in that: the spring pressing device is characterized by further comprising a telescopic cylinder (17) arranged in the first spring (5), and two ends of the telescopic cylinder (17) are fixedly connected with the top cover (4) and the pressing plate (6) respectively.

5. An explosion-proof small lithium battery as claimed in claim 4, characterized in that: the anti-skid device is characterized by further comprising an insulating pad arranged at the bottom of the pressing plate (6), and anti-skid ribs are arranged at the bottom of the insulating pad.

6. An explosion-proof small lithium battery as claimed in claim 5, characterized in that: the anti-skidding type automobile seat further comprises a base plate fixed at the bottom of the shell (3), and an anti-skidding groove is formed in the bottom of the base plate.

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