CN218896756U

CN218896756U - Explosion-proof shell of lithium battery

Info

Publication number: CN218896756U
Application number: CN202320092346.3U
Authority: CN
Inventors: 邹楚楠; 高雪源; 吴波; 沈跃钢; 余敦龙; 庄小飞; 秦俊琦
Original assignee: Changzhou Baojie Chongpian Co ltd
Current assignee: Changzhou Baojie Chongpian Co ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-04-21
Anticipated expiration: 2033-01-31

Abstract

The utility model discloses an explosion-proof shell of a lithium battery, which has the technical key points that: including the explosion-proof case that is used for installing lithium cell body, the buffer board is installed to the bottom of explosion-proof case, and installs two symmetrical first guide bars on the side surface, install fire-retardant rubber pad on the buffer board, the lithium cell body is placed fire-retardant rubber pad is last, and wherein two slidable mounting has first grip block on the first guide bar, one side of first grip block supports and ends on the lithium cell body, and is in through the fix with screw on the first guide bar, the buffer board of explosion-proof case bottom installation can slow down the dynamics that the lithium cell body received external force impact, reduces the influence that the lithium cell body received, produces the clearance between plectane and the annular slab, conveniently arranges the pressure, reduces the inside pressure of explosion-proof case 1, through the reaction force of first spring, makes things convenient for the plectane to reset after arranging the pressure to accomplish, improves the sealing performance of arranging the pressure pipe.

Description

Explosion-proof shell of lithium battery

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to an explosion-proof shell of a lithium battery.

Background

Lithium batteries are a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material. The lithium battery has the characteristics of light weight, large energy storage, no pollution, long service life and the like, so the lithium battery is widely applied to various industries, such as national defense industry, aviation field, small to new energy automobiles, UPS energy storage base stations and the like.

For example, chinese patent with publication number CN215418334U discloses an explosion-proof square lithium battery shell, which comprises a square shell, and a positive electrode cover plate and a negative electrode cover plate which are respectively arranged at two ends of the square shell; the positive electrode cover plate is characterized in that one end of the positive electrode cover plate is provided with a positive electrode explosion-proof hole; one end of the negative electrode cover plate is provided with a negative electrode explosion-proof hole; the positive explosion-proof hole and the negative explosion-proof hole have the same structure; explosion-proof adhesive films and explosion-proof sheets are arranged in the anode explosion-proof holes and the cathode explosion-proof holes.

The explosion-proof square lithium battery shell has the advantage of ensuring that the lithium battery cannot leak electrolyte; however, the explosion-proof square lithium battery case still has some disadvantages, such as: on the one hand, inconvenient row presses, when lithium cell receives the influence of external force, leads to the increase of battery internal pressure easily, and thereby the casing is difficult to bear battery internal pressure when pressure is great produces the explosion, causes harm, and on the other hand, lithium cell buffer property is general, receives the influence of external force easily, causes lithium cell inside to receive the influence, leads to the increase of battery internal pressure easily, reduces the security.

Disclosure of Invention

The utility model aims to provide an explosion-proof shell of a lithium battery, which solves the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a lithium battery explosion-proof housing, includes the explosion-proof case that is used for installing the lithium battery body, the buffer board is installed to the bottom of explosion-proof case, and installs two symmetrical first guide bars on the side surface, install fire-retardant rubber pad on the buffer board, the lithium battery body is placed fire-retardant rubber pad is last, wherein two slidable mounting has first grip block on the first guide bar, one side of first grip block is supported and is stopped on the lithium battery body, and through the screw fixation on the first guide bar, install spacing subassembly on the first grip block, one side block of spacing subassembly is in on the upper surface of lithium battery body;

the explosion-proof box is characterized in that the pressure discharge pipes are arranged on two sides of the explosion-proof box, annular plates are arranged in the pressure discharge pipes, supporting bars are arranged on the explosion-proof box, sliding bars are inserted into the supporting bars, limit nuts are connected to the end portions of the sliding bars in a threaded mode, circular plates are fixedly arranged at the other ends of the sliding bars, and first springs are fixedly arranged between the circular plates and the supporting bars.

Preferably, a plurality of longitudinal and transverse anti-slip grooves are formed in the upper surface of the buffer plate.

Preferably, the limiting component comprises a Z-shaped fixing plate, a connecting lug and a locking screw, wherein the connecting lug is fixedly installed on the back surface of the first clamping plate, one side of the connecting lug is inserted on the locking screw, the other side of the connecting lug is installed on the lithium battery body in a clamping mode, and the end portion of the locking screw is in threaded connection with the connecting lug.

Preferably, two second guide rods are mounted on the inner wall of the explosion-proof box, a second clamping plate is mounted on the second guide rods in a sliding manner, a spring piece is mounted on the back surface of the second clamping plate, one side of the spring piece abuts against the surface of the lithium battery body, and one side of the spring piece abuts against the inner wall of the explosion-proof box.

Preferably, the spring member includes two mounting pieces and a second spring, two ends of the second spring are respectively and fixedly mounted between the two mounting pieces, one mounting piece is fixedly mounted on the second clamping plate, and the other mounting piece is abutted against the inner wall of the explosion-proof box.

Preferably, a rubber sealing piece is arranged on one side of the circular plate, and the rubber sealing piece is fixed on the annular plate.

Preferably, a sealing cover plate is arranged above the explosion-proof box, a junction box is arranged on the sealing cover plate, a binding post is arranged in the junction box, and the binding post is electrically connected with the power transmission end of the lithium battery body through a wire.

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

first, in this lithium cell explosion-proof housing, be favorable to reducing the influence that the lithium cell body received external environment through the explosion-proof case, improve the barrier property to the lithium cell body, the buffer board of explosion-proof bottom of the case portion installation can slow down the lithium cell body and receive the dynamics that external force was strikeed, reduce the influence that the lithium cell body received, can improve the flame retardant efficiency of buffer board through fire-retardant rubber pad, and play the effect of isolating the damping kinetic energy that disappears simultaneously to the lithium cell body, the first grip block of installation on the first guide bar is convenient to fix the lithium cell body, can restrict the vertical direction of lithium cell body through spacing subassembly, improve the fastness of lithium cell body installation in the explosion-proof case;

in the second, this explosion-proof casing of lithium cell, the pressure exhaust pipe of installation on the explosion-proof case is convenient excretes the inside pressure of explosion-proof case, conveniently to slide bar slidable mounting through the support bar, and when internal pressure was big, can drive the plectane of installation on the slide bar and remove to the outside for produce the clearance between plectane and the annular plate, conveniently arrange the pressure, through the reaction force of fixed mounting first spring between plectane and the support bar, make things convenient for the plectane to reset after arranging the pressure completion, improve the sealing performance of pressure exhaust pipe.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is one of the cross-sectional views of the structure of the present utility model;

FIG. 3 is a second cross-sectional view of the structure of the present utility model;

fig. 4 is a partial enlarged view of fig. 3 at a.

In the figure: 1. an explosion-proof box; 2. a lithium battery body; 3. a buffer plate; 4. a flame retardant rubber pad; 5. a first guide bar; 6. a first clamping plate; 7. a limit component; 71. a Z-shaped fixing plate; 72. a connecting lug; 73. a locking screw; 8. a pressure discharge pipe; 9. an annular plate; 10. a support bar; 11. a slide bar; 12. a limit nut; 13. a circular plate; 14. a first spring; 15. an anti-skid groove; 16. a second guide bar; 17. a second clamping plate; 18. a spring member; 181. a mounting piece; 182. a second spring; 19. a rubber sealing sheet; 20. sealing the cover plate; 21. a junction box; 22. and (5) a binding post.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides a lithium cell explosion-proof housing, including being used for installing the explosion-proof case 1 of lithium cell body 2, buffer board 3 is installed to the bottom of explosion-proof case 1, and install two symmetrical first guide bars 5 on the side surface, install fire-retardant rubber pad 4 on the buffer board 3, lithium cell body 2 is placed on fire-retardant rubber pad 4, slidable mounting has first grip block 6 on two first guide bars 5 wherein, one side of first grip block 6 is supported and is stopped on lithium cell body 2, and fix on first guide bar 5 through the screw, install spacing subassembly 7 on first grip block 6, one side block of spacing subassembly 7 is on the upper surface of lithium cell body 2, be favorable to reducing the influence that lithium cell body 2 received external environment through explosion-proof case 1, improve the barrier property to lithium cell body 2, the buffer board 3 of explosion-proof case 1 bottom installation can slow down the dynamics that lithium cell body 2 received external force impact, reduce the influence that lithium cell body 2 received, can improve the fire-retardant effect of buffer board 3 through fire-retardant rubber pad 4, and simultaneously to the effect that the lithium cell body 2 is removed on isolating quantity, first guide bar 5 carries out the firm restriction of lithium cell body 2, the lithium cell body 2 is installed in the first direction of the lithium cell body 2 is fixed through the first guide bar 7, the vertical restriction of the lithium cell body 2 is carried out the vertical restriction of the installation of the vertical position of the lithium cell body 2 is convenient;

the pressure discharge pipes 8 are arranged on two sides of the explosion-proof box 1, the annular plates 9 are arranged in the pressure discharge pipes 8, the supporting rods 10 are arranged on the explosion-proof box 1, the sliding rods 11 are inserted into the supporting rods 10, limiting nuts 12 are in threaded connection with the end parts of the sliding rods 11, circular plates 13 are fixedly arranged at the other ends of the supporting rods, first springs 14 are fixedly arranged between the circular plates 13 and the supporting rods 10, the pressure discharge pipes 8 arranged on the explosion-proof box 1 conveniently discharge the pressure inside the explosion-proof box 1, the sliding rods 11 are conveniently and slidably arranged through the supporting rods 10, when the internal pressure is high, the circular plates 13 arranged on the sliding rods 11 can be driven to move outwards, gaps are formed between the circular plates 13 and the annular plates 9, the pressure is conveniently discharged, the circular plates 13 are conveniently reset after the pressure discharge is completed through the reaction force of the first springs 14, and the sealing performance of the pressure discharge pipes 8 is improved.

In this embodiment, preferably, the upper surface of the buffer plate 3 is provided with a plurality of longitudinal and transverse anti-slip grooves 15, and the friction force with the lithium battery body 2 can be increased and the anti-slip performance can be improved by the anti-slip grooves 15 formed on the surface of the buffer plate 3.

In this embodiment, preferably, the limiting component 7 includes a Z-shaped fixing plate 71, a connecting lug 72 and a locking screw 73, the connecting lug 72 is fixedly installed on the back of the first clamping plate 6, one side of the connecting lug 72 is inserted on the locking screw 73, and the other side of the connecting lug is installed on the lithium battery body 2 in a clamping manner, the end part of the locking screw 73 is in threaded connection with the connecting lug 72, the Z-shaped fixing plate 71 and the connecting lug 72 are conveniently fixed through the locking screw 73, and the installation firmness of the Z-shaped fixing plate 71 to the lithium battery body 2 is improved.

In this embodiment, preferably, two second guide rods 16 are installed on the inner wall of the explosion-proof case 1, a second clamping plate 17 is slidably installed on the second guide rods 16, a spring member 18 is installed on the back surface of the second clamping plate 17, one side of the spring member 18 abuts against the surface of the lithium battery body 2, one side of the spring member 18 abuts against the inner wall of the explosion-proof case 1, the second clamping plate 17 slidably installed on the second guide rods 16 is used for facilitating the second clamping plate 17 to abut against the surface of the lithium battery body 2 through the reaction force of the spring member 18, and the firmness of the lithium battery body 2 is improved.

In this embodiment, preferably, the spring member 18 includes two mounting pieces 181 and a second spring 182, two ends of the second spring 182 are respectively and fixedly mounted between the two mounting pieces 181, one mounting piece 181 is fixedly mounted on the second clamping plate 17, and the other mounting piece 181 abuts against the inner wall of the explosion-proof box 1, and the second spring 182 is conveniently fixed by the two mounting pieces 181, so as to be mounted on the back surface of the second clamping plate 17.

In this embodiment, preferably, a rubber sealing piece 19 is disposed on one side of the circular plate 13, the rubber sealing piece 19 is fixed on the annular plate 9, and the sealing performance between the annular plate 9 and the circular plate 13 is improved by the rubber sealing piece 19, so that impurities and moisture are reduced from entering the explosion-proof box 1.

In this embodiment, preferably, the sealing cover plate 20 is installed to the top of explosion-proof box 1, installs terminal box 21 on the sealing cover plate 20, installs terminal 22 in the terminal box 21, and terminal 22 passes through wire and the transmission end electric connection of lithium cell body 2, conveniently seals explosion-proof box 1 through sealing cover plate 20, through terminal 22 of installing in the terminal box 21, conveniently with lithium cell body 2 electric connection, make things convenient for lithium cell body 2 to supply power.

The working principle of the utility model is as follows: this explosion-proof casing of lithium cell is when using, place lithium cell body 2 on fire-retardant rubber pad 4, first grip block 6 of installing on the first guide bar 5 is fixed lithium cell body 2, can restrict lithium cell body 2 vertical direction through spacing subassembly 7, improve the fastness of lithium cell body 2 at explosion-proof case 1 internal installation, the pressure tube 8 of arranging of installing on the explosion-proof case 1 excretes the inside pressure of explosion-proof case 1, slide bar 11 slidable mounting through support bar 10, when internal pressure is big, can drive the plectane 13 of installing on the slide bar 11 and move to the outside, make and produce the clearance between plectane 13 and the annular plate 9, arrange the pressure, through the reaction force of fixed mounting first spring 14 between plectane 13 and the support bar 10, make things convenient for plectane 13 to reset after arranging the pressure, improve the sealing performance of arranging the pressure tube 8, the buffer plate 3 of explosion-proof case 1 bottom installation can slow down the dynamics that lithium cell body 2 received external force impact, reduce the influence that lithium cell body 2 received, can improve the fire-retardant effect of buffer plate 3 through fire-retardant rubber pad 4, and simultaneously to the effect that the kinetic energy that the lithium cell body 2 was removed to the volume of isolating.

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

Claims

1. The utility model provides an explosion-proof casing of lithium cell, is including explosion-proof case (1) that are used for installing lithium cell body (2), its characterized in that: the lithium battery pack comprises a lithium battery body (2), and is characterized in that a buffer plate (3) is arranged at the bottom of the explosion-proof box (1), two symmetrical first guide rods (5) are arranged on the side surfaces of the buffer plate (3), a flame-retardant rubber pad (4) is arranged on the buffer plate (3), first clamping plates (6) are slidably arranged on the two first guide rods (5), one side of each first clamping plate (6) is abutted to the lithium battery body (2) and fixed on the corresponding first guide rod (5) through screws, a limiting component (7) is arranged on each first clamping plate (6), and one side of each limiting component (7) is clamped on the upper surface of the corresponding lithium battery body (2);

the explosion-proof box is characterized in that the pressure discharge pipes (8) are arranged on two sides of the explosion-proof box (1), annular plates (9) are arranged in the pressure discharge pipes (8), support bars (10) are arranged on the explosion-proof box (1), sliding bars (11) are inserted into the support bars (10), limit nuts (12) are connected with the end portions of the sliding bars (11) in a threaded mode, circular plates (13) are fixedly arranged at the other ends of the sliding bars, and first springs (14) are fixedly arranged between the circular plates (13) and the support bars (10).

2. The explosion-proof housing of a lithium battery according to claim 1, wherein: a plurality of longitudinal and transverse anti-slip grooves (15) are formed in the upper surface of the buffer plate (3).

3. The explosion-proof housing of a lithium battery according to claim 1, wherein: spacing subassembly (7) are including Z fixed plate (71), engaging lug (72) and locking screw (73), engaging lug (72) fixed mounting is in on the back of first grip block (6), one side cartridge of engaging lug (72) is in locking screw (73), and the opposite side is installed in the block on lithium cell body (2), the tip of locking screw (73) with engaging lug (72) threaded connection.

4. The explosion-proof housing of a lithium battery according to claim 1, wherein: install two second guide bars (16) on the inner wall of explosion-proof case (1), slidable mounting has second grip block (17) on second guide bar (16), install spring piece (18) on the back of second grip block (17), and one side is supported and is stopped on the surface of lithium cell body (2), one side of spring piece (18) is supported and is stopped on the inner wall of explosion-proof case (1).

5. The explosion-proof housing of a lithium battery according to claim 4, wherein: the spring piece (18) comprises two mounting plates (181) and a second spring (182), two ends of the second spring (182) are respectively and fixedly mounted between the two mounting plates (181), one mounting plate (181) is fixedly mounted on the second clamping plate (17), and the other mounting plate (181) is abutted against the inner wall of the explosion-proof box (1).

6. The explosion-proof housing of a lithium battery according to claim 1, wherein: a rubber sealing piece (19) is arranged on one side of the circular plate (13), and the rubber sealing piece (19) is fixed on the annular plate (9).

7. The explosion-proof housing of a lithium battery according to claim 1, wherein: the anti-explosion lithium battery is characterized in that a sealing cover plate (20) is arranged above the anti-explosion box (1), a junction box (21) is arranged on the sealing cover plate (20), a binding post (22) is arranged in the junction box (21), and the binding post (22) is electrically connected with a power transmission end of the lithium battery body (2) through a wire.