Lithium battery storage box with automatic pressure relief function

Abstract

This invention provides a lithium battery storage box with automatic pressure relief function, relating to the field of lithium battery storage boxes. It includes: a box body, a venting plate, a clamping assembly, and a pressure relief cylinder. The box body has an inner frame on its inner side, and a gas storage chamber is provided between the inner frame and the box body. A baffle is sealed to the top of the gas storage chamber. A smoke detector is installed on the inner end of the inner frame. A pipe connects the venting plate to the gas storage chamber, and the venting plate is also provided with five rows of venting nozzles. Two sets of clamping assemblies are provided, respectively placed at both ends of the inner side of the box body. The pressure relief cylinder is sealed and inserted into a sealed pipe on one side of the gas storage chamber. An outer baffle is provided at the outer end of the pressure relief cylinder, and two sets of inner connecting plates are provided at the inner end. The inner connecting plates are slidably inserted into guide posts on the inner side of the inner frame and are each fitted with a spring. When the lithium battery burns, carbon dioxide is released to reduce combustion, and the lithium battery can also be clamped and buffered for protection. Furthermore, it can automatically relieve pressure when the internal pressure of the box is too high.

Description

Technical Field

[0001] This invention relates to the field of lithium battery storage box technology, and in particular to a lithium battery storage box with automatic pressure relief function. Background Technology

[0002] With the widespread application of lithium batteries in electric vehicles, especially in new energy vehicles, their safety issues are becoming increasingly prominent. Under abnormal conditions such as overcharging, over-discharging, short circuits, and high temperatures, lithium batteries may experience thermal runaway, leading to a rapid increase in the internal temperature of the battery, generating a large amount of gas and heat, and potentially causing the battery to burn. Therefore, storage boxes are needed to physically isolate and protect lithium batteries.

[0003] Currently, lithium battery storage boxes cannot effectively prevent the combustion of lithium batteries once they catch fire, nor can they open the pressure relief channel in time when the internal pressure of the battery rises sharply. As a result, they cannot effectively prevent the battery from expanding, rupturing, or even exploding. Summary of the Invention

[0004] To address the problems in the background art, the present invention provides a lithium battery storage box with an automatic pressure relief function. When the lithium battery is burning, it can spray carbon dioxide gas to reduce combustion, clamp and buffer the lithium battery, and automatically relieve pressure when the internal pressure of the box is too high.

[0005] The present invention provides a lithium battery storage box with automatic pressure relief function, specifically including: a box body, a vent plate, a clamping assembly and a pressure relief cylinder; The inner side of the box is provided with an inner frame, and an air storage chamber is provided between the inner frame and the box. A baffle is sealed to the top of the air storage chamber. A smoke detector is installed on the inner end of the inner frame. A top cover is fixed to the top of the box, and a sealing door is installed in the middle of the top cover. The box is also equipped with a set of air outlet plates, which are located between the inner frame and the lithium battery and are connected to the air storage chamber by a pipe. A solenoid valve is installed on the pipe, and the air outlet plates are also equipped with five rows of air nozzles. The clamping assembly has two sets, which are respectively placed at both ends of the inner side of the box and clamp the lithium battery; the pressure relief cylinder is sealed and inserted into the sealing tube on one side of the gas storage chamber. The outer end of the pressure relief cylinder is provided with an outer baffle and is attached to the outer end face of the sealing tube. The inner end is provided with two sets of inner connecting plates, which slide through the guide post on the inner side of the inner frame and are respectively fitted with springs.

[0006] Furthermore, one end of the baffle frame has a concave structure and an inflation tube is inserted therethrough. The top end of the inflation tube is equipped with an inflation connector, and the bottom end is connected to a one-way valve.

[0007] Furthermore, a controller is installed at the outer end of the housing. The bottom of the controller has an external connection port. The power cord of the controller passes through the sealing block inside the gas storage chamber and is connected to the lithium battery. The connection line of the smoke detector passes through the sealing block and is connected to the controller.

[0008] Furthermore, the sealing door is fastened to the top cover and fixed with bolts. The bottom side of the sealing door is connected to a pressure plate by two sets of springs, and the pressure plate presses against the top of the lithium battery.

[0009] Furthermore, the air outlet nozzles on the left and right outer rows of the air outlet chamber plate are tilted outward at 45° respectively.

[0010] Furthermore, the clamping assembly includes an electric push rod, a push plate, a U-shaped clamping plate, and an inner clamping plate; The electric push rods are respectively sealed and inserted into both ends of the gas storage chamber, and the telescopic front end of the electric push rod is fixedly connected to the push plate. The push plate and the U-shaped clamping plate are connected by four sets of guide rods, and springs are respectively installed on the four sets of guide rods. The two sets of inner clamping plates are respectively placed at both ends of the inner side of the U-shaped clamping plate and are respectively connected by two sets of guide rods, and springs are also installed on the two sets of guide rods.

[0011] Furthermore, the pressure relief cylinder is provided with pressure relief strip holes facing each other at one end near the outer baffle. When the pressure relief cylinder slides outward in the sealing tube, the pressure relief strip holes slide out of the sealing tube, and the inside of the box communicates with the outside through the pressure relief strip holes.

[0012] The lithium battery storage box with automatic pressure relief function provided by the present invention has the following beneficial effects: This invention can spray carbon dioxide gas to reduce combustion when a lithium battery is burning, and can also clamp and buffer the lithium battery for protection. It can also automatically relieve pressure when the internal pressure of the casing is too high.

[0013] In addition, by setting up a gas storage chamber, a smoke detector, and a gas outlet plate, when the lithium battery inside the box burns, the smoke detector feeds a signal back to the controller, which controls the solenoid valve to open, allowing the carbon dioxide gas inside the gas storage chamber to flow out through the gas outlet plate and the gas nozzle, thereby reducing the combustion of the lithium battery.

[0014] In addition, by setting up a clamping assembly, the two ends and sides of the lithium battery are clamped by a U-shaped clamping plate and an inner clamping plate. The clamping force of the U-shaped clamping plate on the lithium battery can be adjusted by an electric push rod, and the lithium battery can be better protected by the spring buffer.

[0015] In addition, by setting up a pressure relief cylinder, when the internal pressure of the box is too high, the pressure relief cylinder is pushed outward by the outer baffle, so that the pressure relief strip holes on the upper and lower sides leak out from the sealing tube. The inside of the box is connected to the outside through the pressure relief strip holes, which can automatically perform pressure relief protection and further protect the lithium battery. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0017] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0018] In the attached diagram: Figure 1 A schematic diagram of the overall structure of the present invention is shown; Figure 2 The present invention is shown Figure 1 Schematic diagram of the mid-rear side view structure; Figure 3 The present invention is shown Figure 1 A schematic diagram of the structure after the central sealing door is opened upwards; Figure 4 The present invention is shown Figure 1 Top view of the structure after disassembly of the top cover and sealing door; Figure 5 The present invention is shown Figure 4 A schematic diagram of the structure after the middle frame has been removed upwards; Figure 6 The present invention is shown Figure 5 A schematic diagram of the structure of the middle box and one end of the inner frame after vertical sectioning; Figure 7 The present invention is shown Figure 6 Enlarged structural diagram at point A in the middle; Figure 8 The present invention is shown Figure 7 A schematic diagram of the structure when the pressure relief cylinder slides outward to relieve pressure. Figure 9 A schematic diagram of the air outlet plate in this invention is shown; Figure 10 A schematic diagram of the clamping assembly in this invention is shown; Figure 11 A schematic diagram of the pressure relief cylinder in this invention is shown.

[0019] List of reference numerals 1. Housing; 101. Inner frame; 1011. Guide column; 102. Gas storage chamber; 1021. Sealing block; 1022. Sealing through pipe; 103. Baffle frame; 1031. Inflation pipe; 1032. One-way valve; 104. Smoke detector; 105. Controller; 1051. External connection port; 1052. Power cord; 106. Top cover; 1061. Sealing door; 1062. Pressure plate; 2. Gas outlet plate; 201. Solenoid valve; 202. Gas outlet nozzle; 3. Clamping assembly; 301. Electric push rod; 302. Push plate; 303. U-shaped clamping plate; 304. Inner clamping plate; 4. Pressure relief cylinder; 401. Outer baffle; 402. Pressure relief strip hole; 403. Inner connecting plate. Detailed Implementation

[0020] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0021] Example 1: Please refer to Figures 1 to 11 : This invention proposes a lithium battery storage box with automatic pressure relief function, comprising: a box body 1, an air outlet plate 2, a clamping assembly 3, and a pressure relief cylinder 4; The inner side of the box 1 is provided with an inner frame 101, and a gas storage chamber 102 is provided between the inner frame 101 and the box 1. A baffle 103 is sealed to the top side of the gas storage chamber 102. A smoke detector 104 is installed on the inner end of the inner frame 101. A top cover 106 is fixed to the top of the box 1. A sealing door 1061 is installed in the middle of the top cover 106. Inside the housing 1, there is also a set of air outlet plate 2. The air outlet plate 2 is located between the inner frame 101 and the lithium battery, and is connected to the air storage chamber 102 by a pipe. A solenoid valve 201 is installed on the pipe, and the air outlet plate 2 is also provided with five rows of air outlet nozzles 202. Two sets of clamping components 3 are provided and are respectively placed at both ends of the inner side of the housing 1 to clamp the lithium battery; the pressure relief cylinder 4 is sealed and inserted into the sealing tube 1022 on one side of the gas storage chamber 102. The outer end of the pressure relief cylinder 4 is provided with an outer baffle 401 and is attached to the outer end face of the sealing tube 1022. The inner end is provided with two sets of inner connecting plates 403, and the inner connecting plates 403 are slidably inserted into the guide post 1011 on the inner side of the inner frame 101 and are respectively fitted with springs.

[0022] In embodiments of the present invention, such as Figure 4 , Figure 5As shown, one end of the baffle 103 has a concave structure and an inflation tube 1031 is inserted therethrough. The top end of the inflation tube 1031 is provided with an inflation connector and the bottom end is connected to a one-way valve 1032. Carbon dioxide gas can be filled into the gas storage chamber 102 through the gas tube on the external gas cylinder connected to the inflation connector, and the one-way valve 1032 is used to prevent the carbon dioxide gas inside the gas storage chamber 102 from flowing out.

[0023] In embodiments of the present invention, such as Figure 1 , Figure 6 As shown, a controller 105 is also installed on the outer end of the housing 1. The bottom of the controller 105 is provided with an external connection port. The power cord 1052 of the controller 105 passes through the sealing block 1021 inside the gas storage chamber 102 and is connected to the lithium battery. The connection line of the smoke detector 104 passes through the sealing block 1021 and is connected to the controller 105. The controller 105 is also electrically connected to the solenoid valve 201 and the electric push rod 301. The smoke detector 104 can feed back the detected smoke signal to the controller 105. The controller 105 can also control the solenoid valve 201 and the electric push rod 301.

[0024] In embodiments of the present invention, such as Figure 3 As shown, the sealing door 1061 is fastened to the top cover 106 and fixed with bolts. The bottom side of the sealing door 1061 is connected to the pressure plate 1062 by two sets of springs, and the pressure plate 1062 presses on the top of the lithium battery. The pressure plate 1062 and the springs press and protect the top of the lithium battery.

[0025] In embodiments of the present invention, such as Figure 4 , Figure 9 As shown, the two outer rows of air outlet nozzles 202 on the left and right sides of the air outlet plate 2 are tilted outward at 45°. After the solenoid valve 201 is opened, the carbon dioxide gas inside the air storage chamber 102 flows out through the air outlet plate 2 and the air outlet nozzles 202.

[0026] In embodiments of the present invention, such as Figure 4 , Figure 10 As shown, the clamping assembly 3 includes an electric push rod 301, a push plate 302, a U-shaped clamping plate 303, and an inner clamping plate 304. The electric push rod 301 is sealed and inserted into both ends of the gas storage chamber 102, and the telescopic front end of the electric push rod 301 is fixedly connected to the push plate 302. The push plate 302 and the U-shaped clamping plate 303 are connected by four sets of guide rods, and each of the four sets of guide rods is fitted with a spring. The two sets of inner clamping plates 304 are respectively placed at both ends of the inner side of the U-shaped clamping plate 303 and are connected by two sets of guide rods, and each of the two sets of guide rods is also fitted with a spring. The U-shaped clamping plate 303 and the inner clamping plate 304 clamp the two ends and the sides of the lithium battery. The clamping force of the U-shaped clamping plate 303 on the lithium battery can be adjusted by the electric push rod 301, and the lithium battery can be better protected by the spring buffer.

[0027] In embodiments of the present invention, such as Figure 4 , Figures 6 to 8 As shown, the pressure relief cylinder 4 is provided with pressure relief strip holes 402 facing each other at one end near the outer baffle 401. When the pressure relief cylinder 4 slides outward in the sealing tube 1022, the pressure relief strip holes 402 slide out of the sealing tube 1022, and the inside of the box 1 is connected to the outside through the pressure relief strip holes 402. When the pressure inside the box 1 is too high, the outer baffle 401 presses the pressure relief cylinder 4 to slide outward, so that the pressure relief strip holes 402 facing each other leak out from the sealing tube 1022. The inside of the box 1 is connected to the outside through the pressure relief strip holes 402, which can automatically perform pressure relief protection and further protect the lithium battery.

[0028] The specific usage and function of this embodiment are as follows: In this invention, carbon dioxide gas is filled into the gas storage chamber 102 via a gas pipe connected to an inflation connector on an external gas cylinder, and a one-way valve 1032 is used to prevent the carbon dioxide gas inside the gas storage chamber 102 from flowing out. The lithium battery is placed inside the housing 1, and the electric push rod 301 is controlled by the controller 105 to push the push plate 302. The U-shaped clamping plate 303 and the inner clamping plate 304 clamp the two ends and sides of the lithium battery, and the clamping force of the U-shaped clamping plate 303 on the lithium battery can be adjusted by the electric push rod 301. Inside the housing 1... When the lithium battery catches fire, the smoke detector 104 sends a signal to the controller 105, which controls the solenoid valve 201 to open, allowing the carbon dioxide gas inside the gas storage chamber 102 to flow out through the gas outlet plate 2 and the gas outlet nozzle 202, thus reducing the combustion of the lithium battery. When the pressure inside the housing 1 is too high, the outer baffle 401 pushes the pressure relief cylinder 4 to slide outward, causing the upper and lower opposing pressure relief strip holes 402 to leak out from the sealing pipe 1022. The inside of the housing 1 is connected to the outside through the pressure relief strip holes 402, which can automatically perform pressure relief protection and further protect the lithium battery.

[0029] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0030] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0031] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A lithium battery storage box with automatic pressure relief function, comprising: Box body (1), air outlet plate (2), clamping assembly (3) and pressure relief cylinder (4); The box (1) is characterized in that an inner frame (101) is provided on the inner side of the box (1), and an air storage chamber (102) is provided between the inner frame (101) and the box (1). A baffle (103) is sealed to the top side of the air storage chamber (102). A smoke detector (104) is installed on the inner end of the inner frame (101). A top cover (106) is fixed to the top of the box (1), and a sealing door (1061) is installed in the middle of the top cover (106). The housing (1) is also equipped with a set of air outlet plate (2). The air outlet plate (2) is located between the inner frame (101) and the lithium battery, and is connected to the gas storage chamber (102) by a pipe. A solenoid valve (201) is installed on the pipe. The air outlet plate (2) is also equipped with five air outlet nozzles (202). The clamping assembly (3) has two sets, which are respectively placed at both ends of the inner side of the box (1) to clamp the lithium battery; the pressure relief cylinder (4) is sealed and inserted into the sealing tube (1022) on one side of the gas storage chamber (102). The outer end of the pressure relief cylinder (4) is provided with an outer baffle (401) and attached to the outer end face of the sealing tube (1022). The inner end is provided with two sets of inner connecting plates (403), and the inner connecting plates (403) slide through the guide post (1011) on the inner side of the inner frame (101) and are respectively fitted with springs.

2. A lithium battery storage box with automatic pressure relief function according to claim 1, characterized in that: One end of the baffle (103) is recessed and an inflation tube (1031) is inserted therethrough. The top end of the inflation tube (1031) is provided with an inflation connector and the bottom end is connected to a one-way valve (1032).

3. A lithium battery storage box with automatic pressure relief function according to claim 1, characterized in that: The outer end of the housing (1) is also equipped with a controller (105). The bottom end of the controller (105) is provided with an external connection hole. The power cord (1052) of the controller (105) passes through the sealing block (1021) inside the gas storage chamber (102) and is connected to the lithium battery. The connection line of the smoke detector (104) passes through the sealing block (1021) and is connected to the controller (105).

4. A lithium battery storage box with automatic pressure relief function according to claim 1, characterized in that: The sealing door (1061) is fastened to the top cover (106) and fixed with bolts. The bottom side of the sealing door (1061) is connected to a pressure plate (1062) by two sets of springs, and the pressure plate (1062) presses on the top of the lithium battery.

5. A lithium battery storage box with automatic pressure relief function according to claim 1, characterized in that: The air outlet nozzles (202) on the left and right outer rows of the air outlet plate (2) are tilted outward at 45° respectively.

6. A lithium battery storage box with automatic pressure relief function according to claim 1, characterized in that: The clamping assembly (3) includes an electric push rod (301), a push plate (302), a U-shaped clamping plate (303), and an inner clamping plate (304). The electric push rods (301) are respectively sealed and inserted into both ends of the gas storage chamber (102), and the telescopic front end of the electric push rods (301) is fixedly connected to the push plate (302). The push plate (302) and the U-shaped clamping plate (303) are connected by four sets of guide rods, and springs are respectively installed on the four sets of guide rods. The two sets of inner clamping plates (304) are respectively placed at both ends of the inner side of the U-shaped clamping plate (303) and are respectively connected by two sets of guide rods, and springs are also respectively installed on the two sets of guide rods.

7. A lithium battery storage box with automatic pressure relief function according to claim 1, characterized in that: The pressure relief cylinder (4) is provided with pressure relief strip holes (402) facing each other at one end near the outer baffle (401). When the pressure relief cylinder (4) slides outward in the sealing tube (1022), the pressure relief strip holes (402) slide out of the sealing tube (1022), and the inside of the box (1) is connected to the outside through the pressure relief strip holes (402).

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