Lithium battery thermal runaway testing device

Abstract

The utility model provides a lithium battery thermal runaway testing device, which relates to the technical field of lithium battery testing and comprises a testing box, a lithium battery body arranged at the bottom of the inner wall of the testing box, a temperature sensor fixedly mounted on one side of the inner wall of the testing box, and a controller fixedly mounted on one side of the outer wall of the testing box. One side of the outer wall of the controller is electrically connected with the outer surface wall of the temperature sensor, the back surface of the test box is in contact with a water tank, and a top plate is placed at the top of the water tank. According to the lithium battery cooling device, the water pump is turned on, cold water flows in the circulating water pipe to take away heat adsorbed on the circulating water pipe and return to the water tank, so that the lithium battery is cooled, and when the temperature of the lithium battery continuously rises, the alarm is started through the controller to remind workers of thermal runaway of the lithium battery. And the accuracy of the thermal runaway test on the lithium battery is improved, so that the use effect of the thermal runaway test device for the lithium battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery testing, in particular to a lithium battery thermal runaway testing device. Background Art

[0002] Lithium batteries are rechargeable batteries that use lithium ions as charge carriers. They have the characteristics of high energy density, light weight, long cycle life and low self-discharge rate. They are widely used in mobile electronic devices (such as mobile phones, tablets), electric vehicles, drones, energy storage systems and other fields. The function of lithium batteries is to convert chemical energy into electrical energy for use.

[0003] Existing, such as a lithium battery multi-mode thermal runaway test device in Chinese patent number CN215578714U, includes a box, the inner wall of the box is fixedly connected with an upper fixed plate and a lower fixed plate, the lower side wall of the upper fixed plate and the upper side wall of the lower fixed plate are both provided with grooves, lithium batteries are placed in the two grooves together, and an alarm mechanism is provided in the box, the alarm mechanism includes a fixed box fixedly connected to the inner wall of the box, the inner wall of the fixed box is embedded with two first metal blocks and two second metal blocks, the inner wall of the fixed box is sealed and slidably connected with a moving plate, and the side wall of the fixed box is fixedly connected with a fixed plate. The utility model accelerates the air flow around the lithium battery by starting the fan, realizes the cooling of the lithium battery, and when the buzzer sounds an alarm, it can also remind employees that the lithium battery has thermal runaway phenomenon, and employees do not need to check the lithium battery regularly, which reduces the workload of employees.

[0004] In the prior art, lithium batteries may experience abnormal conditions such as overheating, combustion or explosion due to various reasons during the charging or discharging process, which requires a thermal runaway test for the lithium batteries. However, current detection devices are not accurate in testing the thermal runaway of lithium batteries, which reduces the effectiveness of the testing device. Utility Model Content

[0005] The utility model aims to solve the problem that the existing equipment cannot accurately test the thermal runaway of lithium batteries due to the current testing device when the equipment is in use, and proposes a thermal runaway testing device for lithium batteries.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a lithium battery thermal runaway test device, comprising a test box, a lithium battery body is placed at the bottom of the inner wall of the test box, a temperature sensor is fixedly installed on one side of the inner wall of the test box, a controller is fixedly installed on one side of the outer wall of the test box, and one side of the outer wall of the controller is electrically connected to the outer wall of the temperature sensor, the back of the test box is in contact with a water tank, a top plate is placed on the top of the water tank, a circulating water pipe is fixedly passed through the top of the top plate, and the outer wall of the circulating water pipe is connected to the interior of the test box, a water pump is fixedly installed on the outer wall of the circulating water pipe, and the bottom of the water pump is in contact with the top of the top plate, and a plurality of through holes are opened on the top of the top plate.

[0007] Preferably, a dustproof net is fixedly installed on the top of the top plate, and two cross columns are fixedly installed between the inner surface walls of the water tank.

[0008] Preferably, a forward and reverse motor is fixedly mounted on one side of the outer wall of one of the horizontal columns, a threaded rod is fixedly mounted on one side of the outer wall of the forward and reverse motor, and the outer wall of the threaded rod is movably inserted into the interior of the other horizontal column.

[0009] Preferably, the outer wall of the threaded rod is threadedly connected with a fixing plate, and the inner wall of the fixing plate is provided with a fan assembly.

[0010] Preferably, a limiting rod is fixedly installed between opposite sides of the outer walls of the two horizontal columns, and the inner surface wall of the fixed plate is movably sleeved on the outer surface wall of the limiting rod.

[0011] Preferably, an alarm is fixedly mounted on one side of the outer wall of the test box, and a water inlet pipe is fixedly inserted on one side of the outer wall of the water tank.

[0012] Preferably, a water outlet pipe is fixedly inserted into one side of the outer wall of the water tank, and a water valve is fixedly installed on the outer wall of the water outlet pipe.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. In the utility model, first, after the lithium battery has been used in the test box for a period of time, through the action of the temperature sensor and the controller, when the temperature reaches a set value, the water pump is turned on, and the cold water in the water tank passes through the inside of the test box to take away the heat adsorbed on the circulating water pipe, so as to cool the lithium battery. When the temperature detected by the temperature sensor continues to rise, the alarm is activated through the controller to prompt the staff that the lithium battery has thermal runaway, thereby improving the accuracy of the thermal runaway test of the lithium battery, thereby improving the use effect of the lithium battery thermal runaway test device.

[0015] 2. In the utility model, the forward and reverse motors are started to drive the fixing plate to move back and forth on the threaded rod and the limit rod, thereby moving the fan assembly back and forth and cooling the water in the water tank to ensure that the water in the circulating water pipe is always in a cold water state, thereby improving the efficiency of cooling the lithium battery. Secondly, the dustproof net is used to effectively prevent external dust from entering the water tank through multiple through holes or falling on the fan assembly. After a certain period of time, the internal water is replaced through the water inlet pipe, the water outlet pipe and the water valve, thereby improving the use effect of the lithium battery thermal runaway test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a rear view of the subjective structure of the lithium battery thermal runaway test device proposed by the utility model;

[0017] Figure 2 The disassembly diagram of the thermal runaway test device for lithium batteries proposed in the utility model;

[0018] Figure 3 This is a partial disassembled diagram of the lithium battery thermal runaway test device proposed in the utility model;

[0019] Figure 4 This is a partial diagram of the lithium battery thermal runaway test device proposed in the utility model.

[0020] Legend:

[0021] 1. Test box; 2. Lithium battery body; 3. Temperature sensor; 4. Controller; 5. Water tank; 6. Top plate; 7. Circulating water pipe; 8. Water pump; 9. Through hole; 10. Dust net; 11. Horizontal column; 12. Forward and reverse motor; 13. Threaded rod; 14. Fixed plate; 15. Fan assembly; 16. Limit rod; 17. Alarm; 18. Water inlet pipe; 19. Water outlet pipe; 20. Water valve. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model is further described below in conjunction with the drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0024] Embodiment 1, as Figure 1-Figure 4As shown, the utility model provides a lithium battery thermal runaway test device, including a test box 1, a lithium battery body 2 is placed at the bottom of the inner wall of the test box 1, a temperature sensor 3 is fixedly installed on one side of the inner wall of the test box 1, a controller 4 is fixedly installed on one side of the outer wall of the test box 1, and one side of the outer wall of the controller 4 is electrically connected to the outer wall of the temperature sensor 3, the back of the test box 1 is in contact with a water tank 5, a top plate 6 is placed on the top of the water tank 5, a circulating water pipe 7 is fixedly penetrated through the top of the top plate 6, and the outer wall of the circulating water pipe 7 is connected to the interior of the test box 1, a water pump 8 is fixedly installed on the outer wall of the circulating water pipe 7, and the bottom of the water pump 8 is in contact with the top of the top plate 6, and a plurality of through holes 9 are opened on the top of the top plate 6.

[0025] The effect achieved by the entire embodiment 1 is that after the lithium battery body 2 is started by an external power supply in the test box 1 and works for a period of time, the temperature sensor 3 is installed on one side of the inner wall of the test box 1. Since the temperature sensor 3 and the controller 4 are electrically connected, when the temperature generated by the lithium battery during operation reaches a certain value, the water pump 8 is turned on to allow the water in the water tank 5 to enter the interior of the test box 1 along the circulating water pipe 7. The cold water flows in the circulating water pipe 7 to take away the heat adsorbed on the circulating water pipe 7 and return to the water tank 5, thereby cooling the lithium battery. When the temperature of the lithium battery continues to rise and the temperature detected by the temperature sensor 3 continues to rise to a certain value, the alarm 17 is activated through the controller 4 to remind the staff that the lithium battery has thermal runaway, thereby improving the accuracy of the thermal runaway test of the lithium battery, thereby improving the use effect of the lithium battery thermal runaway test device.

[0026] Embodiment 2, as Figure 2-Figure 4 As shown, a dustproof net 10 is fixedly installed on the top of the top plate 6, and two cross columns 11 are fixedly installed between the inner walls of the water tank 5, and a forward and reverse motor 12 is fixedly installed on one side of the outer wall of one of the cross columns 11, and a threaded rod 13 is fixedly installed on one side of the outer wall of the forward and reverse motor 12, and the outer wall of the threaded rod 13 is movably inserted into the inside of the other cross column 11, and the outer wall of the threaded rod 13 is threadedly connected with a fixing plate 14, and a fan assembly 15 is arranged on the inner wall of the fixing plate 14, and a limiting rod 16 is fixedly installed between the opposite sides of the outer walls of the two cross columns 11, and the inner wall of the fixing plate 14 is movably sleeved on the outer wall of the limiting rod 16, an alarm 17 is fixedly installed on one side of the outer wall of the test box 1, a water inlet pipe 18 is fixedly inserted on one side of the outer wall of the water tank 5, a water outlet pipe 19 is fixedly inserted on one side of the outer wall of the water tank 5, and a water valve 20 is fixedly installed on the outer wall of the water outlet pipe 19.

[0027] The effect achieved by the entire embodiment 2 is that after the water in the water tank 5 cools down the lithium battery in the test box 1, the forward and reverse motor 12 is started to drive the threaded rod 13 to rotate inside one of the horizontal columns 11. Since a limit rod 16 is installed between the two horizontal columns 11, and the fixed plate 14 is movably sleeved on the limit rod 16, the fixed plate 14 moves back and forth on the threaded rod 13 and the limit rod 16 at the same time, causing the fan assembly 15 on the fixed plate 14 to move back and forth to cool the water, thereby improving the cooling effect of the lithium battery in the test box 1. Secondly, the water valve 20 is opened, and under the action of the water inlet pipe 18 and the water outlet pipe 19, after a certain period of time, the water in the water tank 5 can be replaced, which further improves the cooling effect of the lithium battery, thereby improving the use effect of the lithium battery thermal runaway test device.

[0028] Working principle: First, when the lithium battery is tested for thermal runaway, the lithium battery is allowed to work in the test box 1 for a period of time and generates heat, which is detected by the temperature sensor 3. When the temperature reaches a certain value, the water pump 8 is turned on by the controller 4, so that the water in the water tank 5 enters the test box 1 along the circulating water pipe 7, so as to take away the heat adsorbed on the circulating water pipe 7, so as to achieve the effect of cooling the lithium battery. At the same time, the forward and reverse motor 12 installed on one of the horizontal columns 11 is started to drive the fixing plate 14 to move back and forth on the threaded rod 13 and the limit rod 16, and the water is cooled by the reciprocating fan assembly 15, so that the water in the water tank 5 is always kept in a cold water state, so as to ensure the cooling effect of the lithium battery in the test box 1. When the temperature sensor 3 detects that the temperature of the lithium battery continues to rise, the alarm 17 is started by the controller 4 to remind the staff that the lithium battery has a thermal runaway. In general, it not only improves the cooling effect of the lithium battery when it is working, but also ensures the accuracy of the test of the lithium battery, and also improves the use effect of the lithium battery thermal runaway test device.

[0029] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. Lithium battery thermal runaway test device, characterized by: The invention comprises a test box (1), wherein a lithium battery body (2) is placed at the bottom of the inner wall of the test box (1), a temperature sensor (3) is fixedly mounted on one side of the inner wall of the test box (1), a controller (4) is fixedly mounted on one side of the outer wall of the test box (1), and one side of the outer wall of the controller (4) is electrically connected to the outer wall of the temperature sensor (3), the back of the test box (1) is in contact with a water tank (5), a top plate (6) is placed on the top of the water tank (5), a circulating water pipe (7) is fixedly passed through the top of the top plate (6), and the outer wall of the circulating water pipe (7) is connected to the inside of the test box (1), a water pump (8) is fixedly mounted on the outer wall of the circulating water pipe (7), and the bottom of the water pump (8) is in contact with the top of the top plate (6), and a plurality of through holes (9) are opened on the top of the top plate (6).

2. The lithium battery thermal runaway test device according to claim 1, characterized in that: A dustproof net (10) is fixedly installed on the top of the top plate (6), and two cross columns (11) are fixedly installed between the inner surface walls of the water tank (5).

3. The lithium battery thermal runaway test device according to claim 2, characterized in that: A forward and reverse motor (12) is fixedly mounted on one side of the outer wall of one of the transverse columns (11), a threaded rod (13) is fixedly mounted on one side of the outer wall of the forward and reverse motor (12), and the outer wall of the threaded rod (13) is movably inserted into the interior of the other transverse column (11).

4. The lithium battery thermal runaway test device according to claim 3, characterized in that: The outer wall of the threaded rod (13) is threadedly connected to a fixing plate (14), and the inner wall of the fixing plate (14) is provided with a fan assembly (15).

5. The lithium battery thermal runaway test device according to claim 4, characterized in that: A limiting rod (16) is fixedly installed between opposite sides of the outer walls of the two transverse columns (11), and the inner surface wall of the fixed plate (14) is movably sleeved on the outer surface wall of the limiting rod (16).

6. The lithium battery thermal runaway test device according to claim 5, characterized in that: An alarm (17) is fixedly mounted on one side of the outer wall of the test box (1), and a water inlet pipe (18) is fixedly inserted on one side of the outer wall of the water tank (5).

7. The lithium battery thermal runaway test device according to claim 6, characterized in that: A water outlet pipe (19) is fixedly inserted into one side of the outer wall of the water tank (5), and a water valve (20) is fixedly installed on the outer wall of the water outlet pipe (19).

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