Lithium battery performance detection device in high and low temperature environment

Abstract

The utility model discloses a lithium battery performance detection device in high and low temperature environments, and relates to the technical field of lithium batteries. A low-temperature testing machine is arranged at the side end of the high-temperature testing machine; a test battery is arranged in the low-temperature test machine; the side end of the high-temperature testing machine is fixedly connected with a conveying belt; the top end of the high-temperature testing machine is in sliding connection with automatic sealing glass; a tested battery is moved into the high-temperature testing machine, heat is discharged into the high-temperature testing machine through an exhaust pipe, fan blades are rotated through a motor, heat airflow is disturbed through rotation of the fan blades, hot airflow can flow in the high-temperature testing machine, the heat can make uniform contact with the tested battery, and the heat is prevented from being transmitted in the fixed direction; and then the tested battery is moved into the low-temperature testing machine to be subjected to low-temperature testing, high-temperature testing and low-temperature testing can be carried out at the same stage, and the testing convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a lithium battery performance testing device under high and low temperature environments. Background Technology

[0002] Lithium-ion batteries, as chemical power sources with high energy density and long cycle life, are widely used in electric vehicles, energy storage systems, and consumer electronics. However, the performance degradation and thermal runaway risk of lithium-ion batteries under extreme temperature environments remain key issues restricting their safety and reliability.

[0003] Currently, high-temperature testing of lithium batteries is mainly achieved through enclosed heating devices or water bath heating. For example, some testing devices use electric heating tubes to heat the water tank, use clamping mechanisms to fix the battery and simulate a high-temperature environment, or use heating components to locally heat the battery.

[0004] Currently, high-temperature and low-temperature tests usually need to be conducted in stages, resulting in long testing cycles and low equipment reuse rates. For example, ultra-high temperature storage tests require dedicated water bath heating devices, while ultra-low temperature tests require independent temperature control systems, which complicates the testing process. Furthermore, unreasonable layout of heating components or simple heat dissipation structures at high temperatures cause heat to be transferred along a fixed direction, resulting in significant temperature differences in different areas of the battery and affecting the consistency of test results. Utility Model Content

[0005] The purpose of this invention is to provide a lithium battery performance testing device under high and low temperature environments, so as to solve the technical problems of inconvenience in conducting high and low temperature tests on lithium batteries and uneven temperature testing in the prior art.

[0006] The technical problem to be solved by this utility model can be achieved through the following technical solution:

[0007] A lithium battery performance testing device under high and low temperature environments includes a high-temperature testing machine; a low-temperature testing machine is provided on the side of the high-temperature testing machine; a test battery is provided inside the low-temperature testing machine; a conveyor belt is fixedly connected to the side of the high-temperature testing machine; an automatically sealing glass is slidably connected to the top of the high-temperature testing machine; an exhaust pipe is fixedly connected to the inner wall of the high-temperature testing machine; a motor is fixedly connected to the inner wall of the top of the high-temperature testing machine; and the output end of the motor has fan blades.

[0008] As a further embodiment of this utility model: a No. 1 cylinder is fixedly connected to the inner wall of the high temperature testing machine; an impact plate is fixedly connected to the side end of the No. 1 cylinder, and the impact plate is located on the side close to the test battery.

[0009] As a further embodiment of this utility model: an electric push rod is fixedly connected to the side end of the conveyor belt; an electric suction cup is fixedly connected to the side end of the electric push rod, and the electric suction cup is located on the side close to the test battery.

[0010] As a further embodiment of this utility model: a No. 3 cylinder is fixedly connected to the inner wall of the high temperature testing machine; a piercing knife is fixedly connected to the side end of the No. 3 cylinder.

[0011] As a further embodiment of this utility model: a guide plate is fixedly connected inside the high temperature testing machine, and the guide plate has a hole groove inside; a second cylinder is fixedly connected to the inner side wall of the high temperature testing machine; a connecting plug is fixedly connected to the side end of the second cylinder.

[0012] The beneficial effects of this utility model are as follows: The test battery is moved into the high-temperature test chamber, and the heat is discharged into the high-temperature test chamber through the exhaust pipe. The fan blades are rotated by the motor, and the rotation of the fan blades disrupts the heat airflow. The heat airflow can flow inside the high-temperature test chamber, which can make the heat contact the test battery evenly and avoid the heat from being transferred in a fixed direction, thus avoiding inconsistent test results. Then the test battery is moved into the low-temperature test chamber for low-temperature testing. High and low temperature tests can be carried out in the same stage, which improves the convenience of testing. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the impact plate structure in this utility model;

[0016] In the diagram: 1. High-temperature testing machine; 2. Low-temperature testing machine; 3. Test battery; 4. Conveyor belt; 5. Automatic sealing glass; 6. Exhaust pipe; 7. Motor; 8. Fan blade; 9. Impact plate; 10. Cylinder No. 1; 11. Connecting plug; 12. Cylinder No. 2; 13. Cylinder No. 3; 14. Piercing knife; 15. Guide plate; 16. Electric push rod; 17. Electric suction cup. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1-2As shown, a lithium battery performance testing device under high and low temperature environments includes a high-temperature testing machine 1; a low-temperature testing machine 2 is provided on the side of the high-temperature testing machine 1; a test battery 3 is provided inside the low-temperature testing machine 2; a conveyor belt 4 is fixedly connected to the side of the high-temperature testing machine 1; an automatically sealing glass 5 is slidably connected to the top of the high-temperature testing machine 1; an exhaust pipe 6 is fixedly connected to the inner wall of the high-temperature testing machine 1; a motor 7 is fixedly connected to the inner wall of the top of the high-temperature testing machine 1; and the output end of the motor 7 has fan blades 8.

[0019] First, the test battery 3 is subjected to a high-temperature test using a high-temperature tester 1. The test battery 3 is moved into the high-temperature tester 1, and the automatic sealing glass 5 is closed. The heat is discharged into the high-temperature tester 1 through the exhaust pipe 6. The fan blade 8 is rotated by the motor 7. The rotation of the fan blade 8 disrupts the heat airflow, allowing the heat airflow to flow inside the high-temperature tester 1. This avoids the heat airflow being concentrated in one area, ensuring that the heat is evenly contacted with the test battery 3 and preventing the heat from being transferred in a fixed direction, thus avoiding inconsistent test results. Then, the test battery 3 is moved to one side of the low-temperature tester 2 via the conveyor belt 4. With the help of the electric suction cup 17, it is moved into the low-temperature tester 2 for low-temperature testing. High and low temperature tests can be performed in the same stage, improving the convenience of testing.

[0020] A cylinder 10 is fixedly connected to the inner wall of the high-temperature testing machine 1; an impact plate 9 is fixedly connected to the side end of the cylinder 10, and the impact plate 9 is located on the side close to the test battery 3.

[0021] When the test battery 3 is under high and low temperature testing, an impact test can be performed according to the test requirements to test the impact resistance of the test battery 3 in high and low temperature environments. The impact plate 9 is impacted towards the test battery 3 by the first cylinder 10 to test the performance of the test battery 3 under different temperature environments.

[0022] An electric push rod 16 is fixedly connected to the side end of the conveyor belt 4; an electric suction cup 17 is fixedly connected to the side end of the electric push rod 16, and the electric suction cup 17 is located on the side close to the test battery 3.

[0023] During operation, the test battery 3 is transported by the conveyor belt 4 to one side of the high temperature testing machine 1. The electric push rod 16 causes the electric suction cup 17 to push the test battery 3 into the interior of the high temperature testing machine 1 for testing. After the test battery 3 is tested, it is fixed by the electric suction cup 17. The electric push rod 16 moves the electric suction cup 17 to move the test battery 3 onto the conveyor belt 4. The electric push rod 16 and the electric suction cup 17 facilitate the movement of the test battery 3.

[0024] The inner wall of the high-temperature testing machine 1 is fixedly connected to a third cylinder 13; a piercing knife 14 is fixedly connected to the side end of the third cylinder 13.

[0025] According to the testing requirements of test battery 3, a puncture test can be performed to test whether the test battery 3 will burn after being punctured in different environments. After the test battery 3 is inside the high temperature testing machine 1, the puncture knife 14 is moved and inserted into the interior of the test battery 3 by the No. 3 cylinder 13 to perform the puncture test. Different testing methods can meet the quality requirements of the test battery 3 in various environments and under various conditions.

[0026] A guide plate 15 is fixedly connected inside the high temperature testing machine 1, and the guide plate 15 has a hole groove inside; a second cylinder 12 is fixedly connected to the inner side wall of the high temperature testing machine 1; a connecting plug 11 is fixedly connected to the side end of the second cylinder 12.

[0027] The guide plate 15 is located below the fan blade 8. The guide plate 15 can guide the airflow of the fan blade 8 to both sides. Some gas can flow downward through the holes and slots of the guide plate 15 to avoid the gas from concentrating and flowing to the top of the test battery 3. During the high and low temperature test, the connecting plug 11 is inserted into the interior of the test battery 3 through the second cylinder 12 to connect the power supply and check whether the test battery 3 can operate normally.

[0028] The working principle of this utility model is as follows: During operation, the test battery 3 is conveyed by the conveyor belt 4 to one side of the high-temperature testing machine 1. The electric push rod 16 causes the electric suction cup 17 to push the test battery 3 into the high-temperature testing machine 1 for testing. After testing, the test battery 3 is fixed by the electric suction cup 17. The electric push rod 16 moves the electric suction cup 17 to move the test battery 3 onto the conveyor belt 4. The electric push rod 16 and the electric suction cup 17 facilitate the movement of the test battery 3. First, the high-temperature testing machine 1 performs a high-temperature test on the test battery 3. Battery 3 is moved into the high-temperature testing machine 1, and the automatic sealing glass 5 is closed. Heat is discharged into the high-temperature testing machine 1 through the exhaust pipe 6. The fan blade 8 is rotated by the motor 7, and the rotation of the fan blade 8 disrupts the heat airflow, allowing the heat airflow to flow freely inside the high-temperature testing machine 1. This prevents the heat airflow from being concentrated in one area, ensuring that the heat is evenly distributed to the test battery 3 and avoiding heat transfer in a fixed direction, which would lead to inconsistent test results. Then, the test battery 3 is moved to one side of the low-temperature testing machine 2 by the conveyor belt 4, and then moved into the low-temperature testing machine 2 by the electric suction cup 17. Low-temperature testing can be performed simultaneously with high- and low-temperature testing, improving testing convenience. The guide plate 15 is located below the fan blade 8, directing the airflow from the fan blade 8 to both sides. Some gas can flow downwards through the slots in the guide plate 15, preventing gas from concentrating at the top of the test battery 3. During high- and low-temperature testing, the connecting plug 11 is inserted into the test battery 3 via the second cylinder 12 to establish a power connection and check if the test battery 3 functions normally. When the test battery 3 is under high- and low-temperature testing, an impact test can be performed according to testing requirements to further test its performance. The impact resistance of battery 3 in high and low temperature environments is tested by impacting the impact plate 9 towards battery 3 using cylinder 10, which can test the performance of battery 3 under different temperature conditions. According to the testing requirements of battery 3, puncture test can be performed to test whether battery 3 will burn after being punctured under different environments. After battery 3 is placed inside the high temperature testing machine 1, puncture knife 14 is moved and inserted into the interior of battery 3 by cylinder 13 to perform puncture test. Different testing methods can meet the quality requirements of battery 3 in various environments and under various conditions.

[0029] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A lithium battery performance testing device under high and low temperature environments, characterized in that, The system includes a high-temperature testing machine (1); a low-temperature testing machine (2) is provided on the right side of the high-temperature testing machine (1); both the high-temperature testing machine (1) and the low-temperature testing machine (2) are equipped with test batteries (3); a conveyor belt (4) is fixedly connected to the front end of the high-temperature testing machine (1); an automatic sealing glass (5) is slidably connected to the top end of the high-temperature testing machine (1); an exhaust pipe (6) is fixedly connected to the right inner wall of the high-temperature testing machine (1); a motor (7) is fixedly connected to the inner wall of the top end of the high-temperature testing machine (1); and the output end of the motor (7) has fan blades (8).

2. The lithium battery performance testing device under high and low temperature environments according to claim 1, characterized in that, A cylinder (10) is fixedly connected to the left inner wall of the high temperature testing machine (1); an impact plate (9) is fixedly connected to the side end of the cylinder (10), and the impact plate (9) is located on the left side of the test battery (3).

3. The lithium battery performance testing device under high and low temperature environments according to claim 1, characterized in that, An electric push rod (16) is fixedly connected to the front end of the conveyor belt (4); an electric suction cup (17) is fixedly connected to the push rod of the electric push rod (16), and the electric suction cup (17) is located on the side close to the test battery (3).

4. The lithium battery performance testing device under high and low temperature environments according to claim 1, characterized in that, The inner wall of the high temperature testing machine (1) is fixed with a No. 3 cylinder (13); a piercing knife (14) is fixed to the left end of the No. 3 cylinder (13).

5. The lithium battery performance testing device under high and low temperature environments according to claim 1, characterized in that, The high temperature testing machine (1) has a guide plate (15) fixed inside, and the guide plate (15) has a slot; the inner side wall of the high temperature testing machine (1) is fixed with a second cylinder (12); the side end of the second cylinder (12) is fixed with a connecting plug (11).

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