A leakage detection device for a lithium battery

Abstract

The utility model discloses a kind of leakage detection devices of lithium battery, including detection box, detection platform is equipped in the detection box inside, electrolyte gas sensor is installed on detection platform;Driving mechanism that can be used to drive detection platform centrifugal motion is installed on the detection box. The present application starts detection after battery is placed to detection platform, judges detection starting time, detects electrolyte gas concentration change value by electrolyte gas sensor after centrifugal high-speed rotation to carry out leakage detection, not only guarantee that lithium battery is not damaged in the process of movement, effectively shorten the time of battery detection simultaneously, improve the efficiency of entire leakage detection manufacturing process. And the present application is under micro-negative pressure state, carries out high-speed centrifugal leakage detection device, detects the numerical change before and after centrifugation by electrolyte gas sensor, quickly and effectively completes leakage detection. Efficiency is high and will not cause damage to battery.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, specifically to a lithium battery leakage detection device. Background Technology

[0002] Lithium-ion batteries are currently recognized as the best and most promising energy storage components. Compared to lead-acid batteries and nickel-metal hydride batteries, lithium-ion batteries are green batteries with a series of superior performance characteristics and have been widely used in mobile phones, laptops, power tools, and new energy vehicles.

[0003] After the lithium battery is filled with electrolyte, it is necessary to detect any leakage to prevent leaking batteries from flowing into the end user and causing a safety accident. Currently, battery leakage detection mainly involves manual inspection by inverting and standing still, and inspection by inverting and squeezing. Manual inspection by inverting and standing still is inefficient and the results are poor due to human factors, while inspection by inverting and squeezing has a certain probability of damaging the battery's appearance. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to solve the problems of low detection efficiency and damage to the battery in lithium battery leakage detection.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A lithium battery leakage detection device includes a detection chamber, inside which is a detection platform, on which an electrolyte gas sensor is installed; the detection chamber is equipped with a drive mechanism for driving the centrifugal motion of the detection platform.

[0007] This application detects leakage by placing the battery on a testing platform and determining the start time of the test. After high-speed centrifugal rotation, the electrolyte gas sensor detects changes in electrolyte gas concentration to perform leakage detection. This not only ensures that the lithium battery is not damaged during movement, but also effectively shortens the battery testing time and improves the efficiency and accuracy of the entire leakage detection process.

[0008] As a further embodiment of this utility model: a vacuum pump is provided on the outside of the detection chamber, and the vacuum pump is connected to the inner cavity of the detection chamber through a pipeline.

[0009] This application utilizes a high-speed centrifugal leakage detection device under slight negative pressure, employing an electrolyte gas sensor to detect numerical changes before and after centrifugation, to quickly and effectively detect leakage. It is highly efficient and does not damage the battery.

[0010] As a further embodiment of this invention, a vacuum valve is provided on the pipeline between the vacuum pump and the inner cavity of the detection chamber.

[0011] The vacuum valve in this application is used to control the opening and closing of the vacuum pump for drawing vacuum.

[0012] As a further embodiment of this utility model: the driving mechanism includes a drive motor, a rotating shaft and a slip ring, wherein the top of the rotating shaft passes through the detection box and is connected to the drive motor located on the outside of the box, and the bottom of the rotating shaft is rotatably connected to the inner bottom plate of the detection box through the slip ring, and the detection platform is mounted on the rotating shaft.

[0013] As a further embodiment of this utility model: the top of the testing platform is provided with several battery mounting slots, and the outer side of the battery mounting slots is provided with positioning blocks for fixing the batteries.

[0014] This application performs leakage testing by detecting changes in the battery through a gas sensor after it is subjected to slight negative pressure and high-speed centrifugal rotation. The testing platform can detect multiple batteries simultaneously and can also be adjusted according to different battery models to meet the requirements of leakage detection.

[0015] As a further embodiment of this utility model: the detection platform is rectangular, the rotating shaft passes through the middle of the detection platform, and several battery mounting slots are distributed equidistantly on the detection platform.

[0016] As a further embodiment of this utility model: the detection platform is disc-shaped, with a rotating shaft passing through the middle of the detection platform, and several battery mounting slots are distributed in a ring array on the detection platform.

[0017] As a further aspect of this invention, the electrolyte gas sensor is an electrochemical gas sensor.

[0018] As a further embodiment of this utility model: the detection box includes an upper sealing box and a lower sealing box, wherein the upper sealing box can be detachably installed on top of the lower sealing box.

[0019] As a further embodiment of this utility model, a sealing ring is provided at the connection between the upper sealing box and the lower sealing box. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the lithium battery leakage detection device according to an embodiment of the present invention;

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Drive motor; 2. Upper sealed housing; 3. Rotating shaft; 4. Lower sealed housing; 5. Positioning block; 6. Electrolyte gas sensor; 7. Detection platform; 8. Slip ring; 9. Vacuum pump; 10. Vacuum valve; 11. Battery; 12. Sealing ring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Reference Figure 1 A lithium battery leakage detection device includes a drive motor 1, an upper sealed housing 2, a rotating shaft 3, a lower sealed housing 4, a positioning block 5, an electrolyte gas sensor 6, a detection platform 7, a slip ring 8, a vacuum pump 9, a vacuum valve 10, a battery 11, and a sealing ring 12.

[0025] Reference Figure 1 The upper sealing box 2 can be detachably installed on top of the lower sealing box 4, and a sealing ring 12 is provided at the connection between the upper sealing box 2 and the lower sealing box 4 to ensure that the connection between the upper sealing box 2 and the lower sealing box 4 is sealed after installation. The sealing ring 12 can be made of rubber.

[0026] Furthermore, two sealing rings 12 can be provided, one embedded in the bottom of the upper sealing box 2 and the other embedded in the top of the lower sealing box 4; when the upper sealing box 2 and the lower sealing box 4 are connected, the two sealing rings are in contact and together achieve the sealing effect of the upper sealing box 2 and the lower sealing box 4.

[0027] Reference Figure 1 The lower sealing box 4 is equipped with a detection platform 7 inside, and a rotating shaft 3 is located in the middle of the detection platform 7. The top of the rotating shaft 3 passes through the upper sealing box 2 and is connected to the drive motor 1 located above the upper sealing box 2. The bottom of the rotating shaft 3 is movably connected to the inner bottom wall of the lower sealing box 4 through a slip ring 8. By controlling the operation of the drive motor 1, the drive motor 1 can drive the rotating shaft 3 to rotate, thereby driving the detection platform 7 connected to the rotating shaft 3 to rotate.

[0028] The testing platform 7 can adopt a rectangular design. The top of the testing platform 7 is provided with several battery mounting slots, which are distributed in an array at equal intervals. Each battery mounting slot is provided with a positioning block 5 for fixing the battery 11 on its outer side.

[0029] Alternatively, the testing platform 7 can be designed as a disc, with several battery mounting slots on the top of the testing platform 7 arranged in a circular array, and each battery mounting slot has a positioning block 5 on its outer side for fixing the battery 11.

[0030] The positioning block 5 can fix the battery 11 in the battery mounting slot. When the rotating shaft 3 rotates, it drives the detection platform 7 to rotate, which in turn drives the battery 11 to rotate.

[0031] Reference Figure 1 An electrolyte gas sensor 6 is provided on the detection platform 7 and on the outside of each battery mounting slot. The electrolyte gas sensor 6 is an electrochemical gas sensor, which is a conventional detection device. This application has not made any improvements to it, but only uses it. Therefore, its principle and specific structure will not be described in detail.

[0032] Reference Figure 1 A vacuum pump 9 is installed on the outside of the upper sealed chamber 2. The vacuum pump 9 is connected to the inner cavity of the chamber through a pipe. A vacuum valve 10 is also provided on the pipe. The vacuum pump 9 and the vacuum valve 10 are used to adjust the detection environment so that the inside of the chamber is in a slightly negative pressure state.

[0033] The specific operating principle of this application is as follows:

[0034] Battery 11 is placed flat on the testing platform 7, and electrolyte gas sensor 6 is installed facing the battery filling port. Battery 11 is positioned by positioning block 5. Then, the upper sealing box 2 and the lower sealing box 4 are fixed.

[0035] During testing, the vacuum pump 9 is controlled to create a vacuum, bringing the cavity environment to a slightly negative pressure state. Then, the drive motor 1 drives the detection platform 7 and the battery 11 to rotate at high speed. After rotating for a certain period of time, the electrolyte gas sensor 6 detects the change in the concentration of the battery electrolyte gas before and after centrifugation, thus quickly and effectively completing the leakage detection.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lithium battery leakage detection device, comprising a detection housing, characterized in that, The detection chamber is equipped with a detection platform (7), and an electrolyte gas sensor (6) is installed on the detection platform (7); the detection chamber is equipped with a drive mechanism that can drive the centrifugal motion of the detection platform (7).

2. The lithium battery leakage detection device according to claim 1, characterized in that: The detection chamber is equipped with a vacuum pump (9) on its exterior, and the vacuum pump (9) is connected to the interior cavity of the detection chamber through a pipeline.

3. The lithium battery leakage detection device according to claim 2, characterized in that: A vacuum valve (10) is installed on the pipeline between the vacuum pump (9) and the inner cavity of the detection chamber.

4. The lithium battery leakage detection device according to claim 1, characterized in that: The driving mechanism includes a drive motor (1), a rotating shaft (3) and a slip ring (8). The top of the rotating shaft (3) passes through the detection box and is connected to the drive motor (1) located on the outside of the box. The bottom of the rotating shaft (3) is rotatably connected to the inner bottom plate of the detection box through the slip ring (8). The detection platform (7) is mounted on the rotating shaft (3).

5. The lithium battery leakage detection device according to claim 4, characterized in that: The top of the testing platform (7) is provided with several battery mounting slots, and the outside of the battery mounting slots is provided with positioning blocks (5) for fixing the batteries.

6. The lithium battery leakage detection device according to claim 5, characterized in that: The testing platform (7) is rectangular in shape, with the rotating shaft (3) passing through the middle of the testing platform (7), and several battery mounting slots are distributed equidistantly on the testing platform (7).

7. A lithium battery leakage detection device according to claim 5, characterized in that: The testing platform (7) is disc-shaped, with a rotating shaft (3) extending from the center of the testing platform (7), and several battery mounting slots arranged in a ring array on the testing platform (7).

8. The lithium battery leakage detection device according to claim 1, characterized in that: The electrolyte gas sensor (6) is an electrochemical gas sensor.

9. A lithium battery leakage detection device according to claim 1, characterized in that: The testing chamber includes an upper sealing chamber (2) and a lower sealing chamber (4), wherein the upper sealing chamber (2) can be detachably installed on top of the lower sealing chamber (4).

10. A lithium battery leakage detection device according to claim 9, characterized in that: A sealing ring (12) is provided at the connection between the upper sealing box (2) and the lower sealing box (4).

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