Improved lithium battery cover plate

Abstract

The utility model discloses an improved lithium battery cover plate and relates to the technical field of lithium battery packaging. The surface of the bottom plate is fixedly provided with a pole and a concave elastic piece, the side wall of the concave elastic piece is provided with an air hole, the top surface of the bottom wall of the concave elastic piece is fixedly provided with an ejector rod, the top surface of the bottom plate is fixedly provided with a covering plate, the surface of the covering plate is provided with a fire extinguishing assembly and an extrusion assembly, and the fire extinguishing assembly is arranged right above the concave elastic piece. The extrusion assembly is arranged outside the fire extinguishing assembly, and the top face of the covering plate and the outer surface of the extrusion assembly are covered with buffering assemblies. The concave elastic piece bounces upwards to drive the ejector rod to stamp upwards, so that the ejector rod conducts the bottom of the fire extinguishing assembly, meanwhile, air pressure generated by gas accumulated in the extrusion assembly extrudes the fire extinguishing assembly, fire extinguishing powder in the fire extinguishing assembly is sprayed out, and the fire extinguishing powder enters the concave elastic piece and enters the lower portion of the bottom plate through the air holes; the active fire extinguishing capacity and the liquid splashing preventing capacity are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery packaging, in particular to an improved lithium battery cover plate. Background Art

[0002] With the rapid development of the new energy industry, lithium batteries are widely used in industries such as automobiles and communication equipment. However, due to the very active chemical properties of lithium metal, there are certain risks in the storage and use of lithium batteries, and they need to be packaged using a shell and cover with stable properties and reliable structure.

[0003] In the prior art, the lithium battery cover plate published in the Chinese patent with authorization announcement number CN215731926U will cause the top block to lift the cover plate to prevent the battery from bursting when the pressure inside the battery reaches above the critical value. The protective film can prevent the cover plate from flying off at high speed. It has a simple structure and high safety and sensitivity.

[0004] The above-mentioned prior art solution has the following defects: the air flow impact generated when the battery bursts is buffered by the cooperation between the air holes and the top block, but the air flow impact that can be buffered by the air holes is limited, and the impact that the top block can withstand is also limited. In addition, when the lithium battery bursts, gas and liquid splash and fire will occur. The above-mentioned solution lacks a further fire-proof and splash-proof structure, so the improvement of the overall safety performance of the lithium battery is limited.

[0005] Therefore, an improved lithium battery cover is proposed. Utility Model Content

[0006] The purpose of the present invention is to solve the problems mentioned in the above background technology and provide an improved lithium battery cover.

[0007] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0008] An improved lithium battery cover plate comprises a bottom plate, a pole and a concave spring sheet are fixedly mounted on the surface of the bottom plate, a ventilation hole is opened on the side wall of the concave spring sheet, a top rod is fixedly mounted on the top surface of the bottom wall of the concave spring sheet, a covering plate is fixedly mounted on the top surface of the bottom plate, a fire extinguishing assembly and an extrusion assembly are arranged on the surface of the covering plate, the fire extinguishing assembly is arranged directly above the concave spring sheet, the extrusion assembly is arranged outside the fire extinguishing assembly, and the top surface of the covering plate and the outer surface of the extrusion assembly are covered with a buffer assembly.

[0009] Furthermore, the fire extinguishing assembly includes a fire extinguishing powder box and a blocking ball, the fire extinguishing powder box is fixedly installed on the top surface of the covering plate, a rubber cover is fixedly installed on the top of the fire extinguishing powder box, the blocking ball is stuck on the surface of the covering plate, the blocking ball is arranged directly below the rubber cover, the bottom surface of the blocking ball is fitted with the top surface of the push rod, and the diameter of the blocking ball is larger than the diameter of the push rod.

[0010] Furthermore, the extrusion assembly includes an inner air inlet hole and a sealing cover, wherein the inner air inlet hole is opened on the surface of the covering plate and is arranged at the periphery of the fire extinguishing powder box, and the sealing cover is fitted on the top surface of the covering plate and is arranged at the periphery of the inner air inlet hole.

[0011] Furthermore, the buffer assembly includes an external air inlet hole and a flexible film, the external air inlet hole is opened on the surface of the cover plate and arranged outside the internal air inlet hole, and the flexible film is fitted and covered on the top surface of the cover plate and the outer surface of the sealing cover.

[0012] Furthermore, the number of the air holes is several and they are evenly distributed on the side wall of the concave spring sheet.

[0013] Furthermore, the number of the top rods is several and they are evenly distributed in an annular array.

[0014] The beneficial effects of the utility model are as follows:

[0015] The gas generated when an explosion and fire occurs inside the lithium battery impacts the concave spring piece, causing it to bounce upward. At the same time, the gas enters the extrusion assembly and the buffer assembly through the air vent. The concave spring piece bounces upward and drives the push rod to poke upward, so that the push rod connects the bottom of the fire extinguishing assembly. At the same time, the air pressure generated by the gas accumulated in the extrusion assembly squeezes the fire extinguishing assembly, causing the fire extinguishing powder in the fire extinguishing assembly to spray out. The fire extinguishing powder enters the concave spring piece and enters under the bottom plate through the air vent, which can extinguish the fire inside the battery. At the same time, the remaining gas enters the buffer assembly, and the expansion and deformation of the buffer assembly buffers the air pressure generated by the burst and prevents liquid splashing. The buffer assembly has the ability to actively extinguish fire and prevent liquid splashing, which can greatly improve the safety performance of lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an axonometric diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 It is an exploded view of the three-dimensional structure of the utility model;

[0018] Figure 3 It is a front cross-sectional view of a local three-dimensional structure of the utility model;

[0019] Figure numerals: 1, bottom plate; 2, pole; 3, concave spring piece; 4, air vent; 5, top rod; 6, cover plate; 7, fire extinguishing assembly; 701, fire extinguishing powder box; 702, rubber cover; 703, plugging ball; 8, extrusion assembly; 801, inner air inlet; 802, sealing cover; 9, buffer assembly; 901, outer air inlet; 902, flexible film. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figures 1 to 3 As shown, an improved lithium battery cover plate includes a base plate 1, a pole 2 and a concave spring piece 3 are fixedly installed on the surface of the base plate 1, a vent hole 4 is opened on the side wall of the concave spring piece 3, a top rod 5 is fixedly installed on the top surface of the bottom wall of the concave spring piece 3, a covering plate 6 is fixedly installed on the top surface of the base plate 1, a fire extinguishing assembly 7 and an extrusion assembly 8 are provided on the surface of the covering plate 6, the fire extinguishing assembly 7 is arranged directly above the concave spring piece 3, the extrusion assembly 8 is arranged outside the fire extinguishing assembly 7, and the top surface of the covering plate 6 and the outer surface of the extrusion assembly 8 are covered with a buffer assembly 9.

[0026] More specifically, the gas generated when an explosion and fire occurs inside the lithium battery impacts the concave spring piece 3, causing it to bounce upward. At the same time, the gas enters the extrusion component 8 and the buffer component 9 through the air vent 4. The concave spring piece 3 bounces upward and drives the push rod 5 to poke upward, so that the push rod 5 connects the bottom of the fire extinguishing component 7. At the same time, the air pressure generated by the gas accumulated in the extrusion component 8 squeezes the fire extinguishing component 7, so that the fire extinguishing powder in the fire extinguishing component 7 is sprayed out, and the fire extinguishing powder enters the concave spring piece 3 and enters under the bottom plate 1 through the air vent 4, which can extinguish the fire inside the battery. At the same time, the remaining gas enters the buffer component 9, and the expansion and deformation of the buffer component 9 buffers the air pressure generated by the burst and prevents liquid from splashing. The buffer component has the ability to actively extinguish fire and prevent liquid from splashing, which can greatly improve the safety performance of lithium batteries.

[0027] The fire extinguishing assembly 7 includes a fire extinguishing powder box 701 and a blocking ball 703. The fire extinguishing powder box 701 is fixedly installed on the top surface of the covering plate 6. A rubber cover 702 is fixedly installed on the top of the fire extinguishing powder box 701. The blocking ball 703 is plugged on the surface of the covering plate 6. The blocking ball 703 is arranged directly below the rubber cover 702. The bottom surface of the blocking ball 703 is fitted with the top surface of the top rod 5, and the diameter of the blocking ball 703 is larger than the diameter of the top rod 5.

[0028] Specifically, the top rod 5 moves upward to push the blocking ball 703 upward, so that the blocking ball 703 detaches from the surface of the covering plate 6 and enters the fire extinguishing powder box 701. The rolling of the blocking ball 703 on the top surface of the covering plate 6 will help the fire extinguishing powder in the fire extinguishing powder box 701 to mix and promote the reaction. Under the action of the extrusion component 8, the rubber cover 702 is squeezed, and the gas and powder in the fire extinguishing powder box 701 are pushed out to the concave spring piece 3 through the push of the rubber cover 702, and enter under the bottom plate 1 through the air vent 4, thereby realizing active fire extinguishing.

[0029] The extrusion assembly 8 includes an inner air inlet hole 801 and a sealing cover 802 . The inner air inlet hole 801 is opened on the surface of the cover plate 6 and is arranged outside the fire extinguishing powder box 701 . The sealing cover 802 is fitted on the top surface of the cover plate 6 and is arranged outside the inner air inlet hole 801 .

[0030] Specifically, the gas enters the interlayer between the fire extinguishing powder box 701 and the sealing cover 802 through the inner air inlet hole 801. Since the sealing cover 802 cannot be deformed, the gas gathers in the interlayer to generate a large air pressure. The air pressure force squeezes the rubber cover 702 to deform. The rubber cover 702 squeezes the air and fire extinguishing powder in the fire extinguishing powder box 701 downward to the concave spring piece 3, and enters under the bottom plate 1 through the air vent 4.

[0031] The buffer assembly 9 includes an outer air inlet hole 901 and a flexible film 902 . The outer air inlet hole 901 is opened on the surface of the cover plate 6 and is arranged outside the inner air inlet hole 801 . The flexible film 902 is fitted and covered on the top surface of the cover plate 6 and the outer surface of the sealing cover 802 .

[0032] Specifically, excess gas enters the interlayer between the flexible film 902 and the cover plate 6 and the sealing cover 802 through the external air inlet 901, causing the flexible film 902 to deform and expand, thereby accommodating and buffering the gas generated by the explosion and preventing damage caused by gas and liquid splashing.

[0033] There are a plurality of air holes 4 evenly distributed on the side wall of the concave spring sheet 3 .

[0034] Specifically, a plurality of evenly distributed air holes 4 can quickly and evenly transmit the gas upward.

[0035] There are several push rods 5 distributed in a uniform annular array.

[0036] Specifically, by providing a plurality of ejector rods 5 to eject the blocking balls 703 , the fire extinguishing powder in the fire extinguishing powder box 701 can enter the concave shrapnel 3 and under the bottom plate 1 more quickly and evenly, thereby achieving rapid and active fire extinguishing.

[0037] In summary: the gas generated when an explosion and fire occurs inside the lithium battery impacts the concave spring piece 3, causing it to bounce upward. At the same time, the gas enters the extrusion component 8 and the buffer component 9 through the air vent 4. The concave spring piece 3 bounces upward and drives the push rod 5 to poke upward, so that the push rod 5 connects the bottom of the fire extinguishing component 7. At the same time, the air pressure generated by the gas accumulated in the extrusion component 8 squeezes the fire extinguishing component 7, so that the fire extinguishing powder in the fire extinguishing component 7 is sprayed out, and the fire extinguishing powder enters the concave spring piece 3 and enters under the bottom plate 1 through the air vent 4, which can extinguish the fire inside the battery. At the same time, the remaining gas enters the buffer component 9, and the expansion and deformation of the buffer component 9 buffers the air pressure generated by the burst and prevents liquid from splashing. It has the ability to actively extinguish fire and prevent liquid from splashing, and can greatly improve the safety performance of lithium batteries.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An improved lithium battery cover, characterized in that: The invention comprises a bottom plate (1), the bottom plate (1) having a pole (2) and a concave spring sheet (3) fixedly mounted on its surface, the side wall of the concave spring sheet (3) being provided with an air vent (4), a top rod (5) fixedly mounted on the top surface of the bottom wall of the concave spring sheet (3), a covering plate (6) fixedly mounted on the top surface of the bottom plate (1), a fire extinguishing assembly (7) and an extrusion assembly (8) being provided on the surface of the covering plate (6), the fire extinguishing assembly (7) being arranged directly above the concave spring sheet (3), the extrusion assembly (8) being arranged outside the fire extinguishing assembly (7), and the top surface of the covering plate (6) and the outer surface of the extrusion assembly (8) being covered with a buffer assembly (9).

2. The improved lithium battery cover according to claim 1, characterized in that: The fire extinguishing assembly (7) comprises a fire extinguishing powder box (701) and a blocking ball (703); the fire extinguishing powder box (701) is fixedly mounted on the top surface of a cover plate (6); a rubber cover (702) is fixedly mounted on the top of the fire extinguishing powder box (701); the blocking ball (703) is plugged and arranged on the surface of the cover plate (6); the blocking ball (703) is arranged directly below the rubber cover (702); the bottom surface of the blocking ball (703) is arranged to fit the top surface of a push rod (5); and the diameter of the blocking ball (703) is greater than the diameter of the push rod (5).

3. The improved lithium battery cover according to claim 2, characterized in that: The extrusion assembly (8) comprises an inner air inlet hole (801) and a sealing cover (802); the inner air inlet hole (801) is opened on the surface of the cover plate (6) and is arranged on the periphery of the fire extinguishing powder box (701); and the sealing cover (802) is fitted on the top surface of the cover plate (6) and is arranged on the periphery of the inner air inlet hole (801).

4. The improved lithium battery cover according to claim 3, characterized in that: The buffer component (9) comprises an external air inlet hole (901) and a flexible film (902); the external air inlet hole (901) is opened on the surface of the cover plate (6) and is arranged outside the internal air inlet hole (801); and the flexible film (902) is fitted and covered on the top surface of the cover plate (6) and the outer surface of the sealing cover (802).

5. The improved lithium battery cover according to claim 1, characterized in that: The number of the air holes (4) is several and they are evenly distributed on the side wall of the concave spring sheet (3).

6. The improved lithium battery cover according to claim 1, characterized in that: The number of the top rods (5) is several and they are distributed in a uniform annular array.

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