Explosion-proof flame-retardant structure of lithium battery

Abstract

The explosion-proof flame-retardant structure comprises a lithium battery box, pressure relief explosion-proof structures are fixedly mounted on the left side and the right side of the upper end of the lithium battery box, and a flame-retardant structure is mounted in the lithium battery box. By installing the pressure relief explosion-proof structure, when electrolyte gas is generated inside, the gas can be ejected out through the pressure relief assembly, the gas enables the top cover to be jacked up under the action of the elastic piece, the pressure relief channel is opened, the gas can be released, then the possibility of explosion is reduced, the elastic piece is restored to the initial state when the gas is exhausted to a certain degree, and the explosion-proof effect is achieved. According to the flame-retardant structure, automatic pressure relief is facilitated, explosion and installation are further avoided in cooperation with an explosion-proof shell made of an explosion-proof plate, flame-retardant materials are made by adding brominated flame retardants and can restrain or delay combustion, and drying agents and dry powder are arranged in a storage box, so that the dry powder can be released when a fire occurs in the storage box and the fire is burnt into the storage box; and the fire extinguishing effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to an explosion-proof and flame-retardant structure of a lithium battery. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and non-aqueous electrolyte solutions. The chemical properties of lithium metal are very active, which makes the processing, storage, and use of lithium metal very demanding on the environment. With the development of science and technology, lithium batteries have become mainstream.

[0003] The chemical substances in lithium batteries are dangerous and can easily cause fires and explosions. Therefore, in order to ensure the safe use of lithium batteries, a series of fire and explosion prevention measures must be taken. When the electrolyte of existing lithium batteries leaks, there is no pressure relief structure, which causes gas to accumulate inside and cause an explosion. In addition, the flame retardant structure in the lithium battery box is simple and the flame retardant effect is poor. Utility Model Content

[0004] The purpose of the utility model is to provide an explosion-proof and flame-retardant structure of a lithium battery to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an explosion-proof and flame-retardant structure of a lithium battery, comprising a lithium battery box, wherein the left and right sides of the upper end of the lithium battery box are fixedly installed with a pressure relief and explosion-proof structure, and a flame-retardant structure is installed inside the lithium battery box.

[0006] The pressure relief and explosion-proof structure comprises a cylinder, which is fixed on the upper end of the lithium battery box, and a pressure relief component is installed in the cylinder.

[0007] The flame retardant structure comprises a second flame retardant component, which is slidably mounted in the middle of the lithium battery box, and a first flame retardant component is arranged at the left and right ends of the second flame retardant component and inside the lithium battery box.

[0008] As a further preferred embodiment of the present technical solution, the lithium battery box includes an explosion-proof shell, which is made of an explosion-proof plate, a cover plate 1 is bolted to the top side of the explosion-proof shell, handles are fixedly connected to the left and right sides of the cover plate 1, and a slide groove is opened in the middle position of the inner wall of the explosion-proof shell.

[0009] As a further preferred embodiment of the present technical solution, the pressure relief assembly includes a bracket, the bracket is fixedly connected to the inner wall of the cylinder near the upper side, the bracket is embedded with an elastic member, the upper end of the elastic member is embedded with a top cover, the top cover is located above the cylinder, the bottom side of the top cover is fixedly connected with an annular pad, and the bottom side of the annular pad is in contact with the top side of the cylinder.

[0010] In the above technical solution, the gas, under the action of the elastic member, causes the top cover to be lifted, the pressure relief channel to be opened, and the gas can be released, thereby reducing the possibility of explosion. When the gas is discharged to a certain extent, the elastic member returns to its initial state, facilitating automatic pressure relief.

[0011] As a further preferred embodiment of the present technical solution, the flame retardant component 1 includes flame retardant material 2, the flame retardant material 2 is connected to the inner wall of the explosion-proof shell, the inner side of the flame retardant material 2 is coated with adhesive, and the flame retardant material 1 is bonded to the adhesive.

[0012] As a further preferred embodiment of the present technical solution, the flame retardant material 1 and the flame retardant material 2 are prepared by adding a brominated flame retardant.

[0013] In the above technical solution, the flame retardant material is prepared by adding a brominated flame retardant, which can inhibit or delay combustion.

[0014] As a further preferred embodiment of the present technical solution, the second flame retardant component includes a slide plate, the outer wall of the slide plate is slidably connected to the inner wall of the slide groove, a storage box is fixedly connected between the two slide plates, and a cover plate 2 is bolted to the top side of the storage box.

[0015] In the above technical solution, the external storage box is installed in a sliding manner to facilitate replacement.

[0016] As a further preferred embodiment of the present technical solution, a desiccant is provided on the inner wall of the storage box, and the interior of the storage box is filled with dry powder.

[0017] In the above technical solution, desiccant and dry powder are arranged in the storage box, so that when a fire occurs inside and burns to the storage box, the dry powder can be released, thereby playing a role in extinguishing the fire.

[0018] The utility model provides an explosion-proof and flame-retardant structure of a lithium battery, which has the following beneficial effects:

[0019] (1) The utility model installs a pressure relief and explosion-proof structure. When electrolyte gas is generated inside, the gas can be pushed out through the pressure relief component. Under the action of the elastic member, the gas causes the top cover to be lifted up, the pressure relief channel is opened, and the gas can be released, thereby reducing the possibility of explosion. When the gas is discharged to a certain extent, the elastic member returns to its initial state, which is convenient for automatic pressure relief. In combination with the explosion-proof housing made of explosion-proof panels, explosion can be further avoided.

[0020] (2) The utility model has a flame retardant structure installed, and the flame retardant material is made by adding a brominated flame retardant, which can inhibit or delay combustion. A desiccant and dry powder are arranged in the storage box, so that when a fire occurs inside and burns to the storage box, the dry powder can be released to extinguish the fire. The desiccant can prolong the fire extinguishing effect of the dry powder and avoid moisture. In addition, the storage box is installed in a sliding manner, which is convenient for replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the explosion-proof and flame-retardant structure of the utility model;

[0022] Figure 2 The utility model is Figure 1 Schematic diagram of the split structure;

[0023] Figure 3 The utility model is Figure 2 A magnified view of Figure A;

[0024] Figure 4 The utility model is Figure 2 Structural schematic diagram of the flame retardant structure;

[0025] Figure 5 The utility model is Figure 4 A schematic diagram of the internal structure of a flame retardant component;

[0026] In the figure: 1. lithium battery box; 2. pressure relief explosion-proof structure; 3. flame retardant structure; 11. explosion-proof shell; 12. cover plate 1; 13. handle; 14. slide; 21. cylinder; 22. pressure relief component; a1. bracket; a2. elastic member; a3. top cover; a4. ring pad; 31. flame retardant component 1; 32. flame retardant component 2; b1. flame retardant material 1; b2. adhesive; b3. flame retardant material 2; c1. slide plate; c2. storage box; c3. cover plate 2; c4. desiccant; c5. dry powder. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] The utility model provides a technical solution: Figure 1 As shown, in the present embodiment, a lithium battery explosion-proof and flame-retardant structure comprises a lithium battery box 1, a pressure relief explosion-proof structure 2 is fixedly installed on the left and right sides of the upper end of the lithium battery box 1, a flame-retardant structure 3 is installed inside the lithium battery box 1, the lithium battery box 1 comprises an explosion-proof shell 11, the explosion-proof shell 11 is made of an explosion-proof plate, a cover plate 12 is bolted to the top side of the explosion-proof shell 11, handles 13 are fixedly connected to the left and right sides of the cover plate 12, and a slide groove 14 is provided in the middle position of the inner wall of the explosion-proof shell 11.

[0029] like Figure 2 and Figure 3As shown, the pressure relief and explosion-proof structure 2 includes a cylinder 21, which is fixed at the upper end of the lithium battery box 1, and a pressure relief component 22 is installed in the cylinder 21. The pressure relief component 22 includes a bracket a1, and the bracket a1 is fixedly connected to the inner wall of the cylinder 21 at the top. An elastic member a2 is embedded in the bracket a1, and a top cover a3 is embedded at the upper end of the elastic member a2. The top cover a3 is located above the cylinder 21, and a circular ring pad a4 is fixedly connected to the bottom side of the top cover a3. The bottom side of the circular ring pad a4 contacts the top side of the cylinder 21. By installing the pressure relief and explosion-proof structure 2, when electrolyte gas is generated inside, the gas can be pushed out through the pressure relief component 22. The gas pushes up the top cover a3 under the action of the elastic member a2, and the pressure relief channel is opened, so that the gas can be released, thereby reducing the possibility of explosion. When the gas is discharged to a certain extent, the elastic member a2 returns to its initial state, which is convenient for automatic pressure relief, and cooperates with the explosion-proof housing 11 made of explosion-proof panels to further avoid explosion.

[0030] like Figure 4 and Figure 5 As shown, the flame retardant structure 3 includes a flame retardant component 2 32, which is slidably installed in the middle position of the lithium battery box 1, and a flame retardant component 1 31 is arranged at the left and right ends of the flame retardant component 2 32 and located inside the lithium battery box 1, and the flame retardant component 1 31 includes a flame retardant material 2 b3, and the flame retardant material 2 b3 is connected to the inner wall of the explosion-proof shell 11, and the inner side of the flame retardant material 2 b3 is coated with an adhesive b2, and the flame retardant material 1 b1 is bonded to the adhesive b2, and the flame retardant material 1 b1 and the flame retardant material 2 b3 are prepared by adding a bromine flame retardant, and the flame retardant component 2 32 includes a slide plate c1, and the outer wall of the slide plate c1 is slidably connected to the inner wall of the slide groove 14, and the two slide plates c 1 is fixedly connected with a storage box c2, a cover plate c3 is bolted to the top side of the storage box c2, a desiccant c4 is arranged on the inner wall of the storage box c2, and the storage box c2 is filled with dry powder c5. The flame retardant structure 3 is installed, and the flame retardant material arranged therein is made by adding a bromine flame retardant, which can inhibit or delay combustion. The desiccant c4 and the dry powder c5 are arranged in the storage box c2, so that a fire occurs inside and burns to the storage box c2, and the dry powder can be released, thereby playing a role in extinguishing the fire. The desiccant c4 can prolong the fire extinguishing effect of the dry powder c5 and avoid moisture. In addition, the storage box c2 is installed in a sliding manner, which is convenient for replacement.

[0031] The utility model provides an explosion-proof and flame-retardant structure of a lithium battery, and the specific working principle is as follows: the lithium battery is installed inside 11, and when electrolyte gas is generated inside, the gas can be pushed out through the pressure relief component 22, and the gas causes the top cover a3 to be lifted up under the action of the elastic member a2, and the pressure relief channel is opened, and the gas can be released, and the gas is discharged to a certain extent so that the elastic member a2 returns to its initial state; if a fire occurs inside, it is blocked by the flame retardant material b1 and the flame retardant material b3, and when the fire burns to the storage box c2, the dry powder c5 is released to extinguish the fire.

[0032] 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 variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof and flame-retardant structure of a lithium battery, comprising a lithium battery box (1), characterized in that: A pressure relief and explosion-proof structure (2) is fixedly installed on the left and right sides of the upper end of the lithium battery box (1), and a flame retardant structure (3) is installed inside the lithium battery box (1); The pressure relief explosion-proof structure (2) comprises a cylinder (21), the cylinder (21) is fixed to the upper end of the lithium battery box (1), and a pressure relief component (22) is installed in the cylinder (21); The flame retardant structure (3) comprises a second flame retardant component (32), wherein the second flame retardant component (32) is slidably mounted in the middle of the lithium battery box (1), and a first flame retardant component (31) is arranged at the left and right ends of the second flame retardant component (32) and located inside the lithium battery box (1).

2. The explosion-proof and flame-retardant structure of a lithium battery according to claim 1, characterized in that: The lithium battery box (1) comprises an explosion-proof shell (11), the explosion-proof shell (11) is made of an explosion-proof plate, a cover plate (12) is bolted to the top side of the explosion-proof shell (11), handles (13) are fixedly connected to the left and right sides of the cover plate (12), and a slide groove (14) is provided in the middle of the inner wall of the explosion-proof shell (11).

3. The explosion-proof and flame-retardant structure of a lithium battery according to claim 1, characterized in that: The pressure relief assembly (22) comprises a bracket (a1), the bracket (a1) is fixedly connected to the inner wall of the cylinder (21) at the top, an elastic member (a2) is embedded in the bracket (a1), a top cover (a3) ​​is embedded in the upper end of the elastic member (a2), the top cover (a3) ​​is located above the cylinder (21), and a circular ring pad (a4) is fixedly connected to the bottom side of the top cover (a3), and the bottom side of the circular ring pad (a4) is in contact with the top side of the cylinder (21).

4. The explosion-proof and flame-retardant structure of a lithium battery according to claim 1, characterized in that: The flame retardant component 1 (31) includes flame retardant material 2 (b3), the flame retardant material 2 (b3) is connected to the inner wall of the explosion-proof shell (11), the inner side of the flame retardant material 2 (b3) is coated with adhesive (b2), and the flame retardant material 1 (b1) is bonded to the adhesive (b2).

5. The explosion-proof and flame-retardant structure of a lithium battery according to claim 4, characterized in that: The flame retardant material 1 (b1) and the flame retardant material 2 (b3) are prepared by adding a bromine-based flame retardant.

6. The explosion-proof and flame-retardant structure of a lithium battery according to claim 1, characterized in that: The second flame retardant component (32) comprises a slide plate (c1), the outer wall of the slide plate (c1) is slidably connected to the inner wall of the slide groove (14), a storage box (c2) is fixedly connected between the two slide plates (c1), and a cover plate (c3) is bolted to the top side of the storage box (c2).

7. The explosion-proof and flame-retardant structure of a lithium battery according to claim 6, characterized in that: The inner wall of the storage box (c2) is provided with a desiccant (c4), and the interior of the storage box (c2) is filled with dry powder (c5).

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