Cylindrical battery gas production pressure detection device

Abstract

The utility model provides a cylindrical battery gas production pressure detection device comprising a pedestal, the pedestal is fixedly provided with a vertical frame, the pedestal is provided with a test outer cylinder, the test outer cylinder is internally provided with a test inner cylinder, the vertical frame is fixedly provided with a slide rail and a driving device, the slide rail is movably provided with a lifting frame, and the lifting frame is fixedly provided with a sealing cover and a tester. The sealing cover is provided with a guide hole communicated with a tester, a sealing piece is fixedly installed on the sealing cover, the sealing cover is provided with an electric connection terminal, and the driving device is in driving connection with the lifting frame through a lead screw. During use, a battery to be tested is placed in the test inner cylinder, then the test inner cylinder is placed in the test outer cylinder, the driving device is started, the lifting frame is driven to descend, the sealing cover covers and presses the opening of the test inner cylinder in a sealing mode, the electric connection terminal is connected with the electrode of the battery, operation before testing is completed rapidly, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of detection technology, specifically relating to a device for detecting the gas production pressure of a cylindrical battery. Background Technology

[0002] Lithium-ion batteries play a crucial role in various fields such as consumer electronics, electric vehicles, and energy storage due to their high energy density, excellent cycle stability, and superior rate performance. During battery operation, lithium ions migrate in the electrolyte and shuttle between the positive and negative electrodes. Interfacial reactions occur at the interface between the electrolyte and the positive and negative electrodes, sometimes producing gas. If the gas distribution is uneven or excessive gas is produced, it will lead to an increase in interfacial impedance (such as film impedance and charge transfer impedance), and will also cause problems such as abnormal electrode stress distribution, abnormal battery heat generation, and abnormal internal resistance. With the increase in energy density of lithium nickel cobalt manganese oxide and silicon-oxygen or silicon-carbon systems, the increase in nickel and silicon content will significantly exacerbate interfacial side reactions and increase gas production, thereby adversely affecting the battery's electrical performance and safety performance.

[0003] To study the gas generation analysis and long-term gas pressure detection of high-nickel and high-silicon battery systems, people have developed a new battery gas generation pressure detection device. However, the existing detection device is inconvenient for placing and removing batteries, which greatly affects the detection efficiency.

[0004] Chinese utility model patent CN222719085U discloses a cylindrical battery gas generation pressure detection device, including a cylindrical sleeve. The bottom end of the cylindrical sleeve has a first flange and a second flange for sealing connection, with the inner circumferential wall of the second flange joint sealed to the outer circumferential wall of the cylindrical sleeve via a first sealing component. The top end of the cylindrical sleeve has a third flange and a fourth flange for sealing connection, with the inner circumferential wall of the fourth flange joint sealed to the outer circumferential wall of the cylindrical sleeve via a second sealing component. A pressure sensor is located on the top surface of the third flange base, and an air hole is provided on the base corresponding to the pressure sensor position. This utility model provides a cylindrical battery gas generation pressure detection device with good sealing performance, effectively avoiding gas leakage under high pressure conditions. However, it is inconvenient to place and remove the battery, significantly affecting the detection efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a cylindrical battery gas generation pressure detection device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cylindrical battery gas generation pressure detection device, comprising a base, on which a support frame is fixedly installed, a test outer cylinder on the base, a test inner cylinder placed inside the test outer cylinder, a slide rail and a drive device fixedly installed on the support frame, a lifting frame movably installed on the slide rail, a sealing cover and a tester fixedly installed on the lifting frame, a guide hole connected to the tester on the sealing cover, a sealing element fixedly installed on the sealing cover, and an electrical connection terminal on the sealing cover, and the drive device driving the lifting frame via a lead screw.

[0007] Preferably, the driving device includes a drive motor and a locking mechanism, wherein the locking mechanism is fixedly connected to the lead screw.

[0008] Preferably, the inner test cylinder is made of rubber, and the inner test cylinder has a flange, and the flange has a raised ring.

[0009] Preferably, the sealing element is made of rubber.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The base of this utility model is equipped with a test outer cylinder, inside which a test inner cylinder is placed for easy battery placement and cleaning. A slide rail and a drive device are fixedly installed on the upright frame. A lifting frame is movably installed on the slide rail, and a sealing cover and a tester are fixedly installed on the lifting frame. The sealing cover has a guide hole connected to the tester and an electrical connection terminal. The drive device drives the lifting frame to move via a lead screw. In use, the battery to be tested is placed in the test inner cylinder, and then the test inner cylinder is placed inside the test outer cylinder. The drive device is activated, causing the lifting frame to descend, pressing the sealing cover against the opening of the test inner cylinder. The electrical connection terminal connects to the battery's electrodes, quickly completing the pre-test operation and improving testing efficiency. Attached Figure Description

[0012] Figure 1 This is the first perspective structural view of this utility model.

[0013] Figure 2 This is the second perspective structural view of this utility model.

[0014] Figure 3 This is a structural view of the inner cylinder of the test tube of this utility model.

[0015] Figure 4 This is a structural view of the lifting frame of this utility model.

[0016] The diagram is labeled as follows: 1. Base; 2. Stand; 3. Outer test cylinder; 4. Inner test cylinder; 5. Slide rail; 6. Drive unit; 7. Lifting frame; 8. Sealing cover; 9. Tester; 10. Guide hole; 11. Seal; 12. Electrical connection terminal; 13. Lead screw; 14. Drive motor; 15. Locking mechanism; 16. Flange; 17. Protruding ring. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1:

[0019] like Figures 1-4 As shown, this utility model provides a cylindrical battery gas pressure detection device, including a base 1, on which a support frame 2 is fixedly installed. The base 1 has a test outer cylinder 3, and a test inner cylinder 4 is placed inside the test outer cylinder 3. The support frame 2 is fixedly installed with a slide rail 5 and a drive device 6. A lifting frame 7 is movably installed on the slide rail 5. A sealing cover 8 and a tester 9 are fixedly installed on the lifting frame 7. The sealing cover 8 has a guide hole 10 connected to the tester 9, a sealing element 11 is fixedly installed on the sealing cover 8, and an electrical connection terminal 12 is provided on the sealing cover 8. The drive device 6 is driven and connected to the lifting frame 7 through a lead screw 13. The drive device 6 includes a drive motor 14 and a locking mechanism 15, which is fixedly connected to the lead screw 13. The test inner cylinder 4 is made of rubber and has a flange 16 with a raised ring 17. The sealing element 11 is also made of rubber.

[0020] Through the above technical solution, the base 1 of this utility model is provided with a test outer cylinder 3, and a test inner cylinder 4 is placed inside the test outer cylinder 3, which facilitates the removal and placement of batteries and the cleaning of the test inner cylinder 4. The upright frame 2 is fixedly installed with a slide rail 5 and a drive device 6. The slide rail 5 is movably installed with a lifting frame 7. The lifting frame 7 is fixedly installed with a sealing cover 8 and a tester 9. The sealing cover 8 is provided with a guide hole 10 connected to the tester 9. The sealing cover 8 is provided with an electrical connection terminal 12. The drive device 6 drives the lifting frame 7 to move through a lead screw 13. In use, the battery to be tested is placed in the test inner cylinder 4, and then the test inner cylinder 4 is placed in the test outer cylinder 3. The drive device 6 is started, and the lifting frame 7 is driven to descend, so that the sealing cover 8 presses against the opening of the test inner cylinder 4. The electrical connection terminal 12 is connected to the electrode of the battery, which quickly completes the pre-test operation and improves the testing efficiency.

[0021] Example 2:

[0022] like Figures 1-4As shown, this embodiment is used to detect gas pressure changes generated during the operation of a high-nickel, high-silicon cylindrical battery. The device achieves rapid battery installation and sealing through a liftable sealing structure, and is equipped with a precise pressure detection system.

[0023] The core components include a base 1, a support frame 2, an outer test cylinder 3, an inner test cylinder 4, a lifting mechanism, and a sealing detection system. The base 1 serves as the support platform for the entire device, with the support frame 2 fixedly mounted on top of it. The outer test cylinder 3 is mounted on the base 1, and the inner test cylinder 4 can be placed inside it. The inner test cylinder 4 is used to hold the battery under test; this separate inner and outer cylinder design facilitates battery placement, removal, cleaning, and maintenance.

[0024] A vertical slide rail 5 and a drive unit 6 are mounted on the upright frame 2. A lifting frame 7 is movably mounted on the slide rail 5, and the lifting frame 7 can move up and down along the slide rail 5 under the drive of the drive unit 6. A sealing cover 8 and a tester 9 are fixedly mounted on the lifting frame 7. The sealing cover 8 is designed with a guide hole 10 communicating with the tester 9, for transmitting the gas pressure generated inside the battery to the tester 9 for measurement. The sealing cover 8 is also equipped with a sealing element 11 to ensure the sealing performance between it and the inner test cylinder 4.

[0025] The sealing cap 8 is equipped with electrical connection terminals 12 for establishing an electrical connection with the electrodes of the battery under test. The drive unit 6 is connected to the lifting frame 7 via a lead screw 13 mechanism, converting the rotational motion of the lead screw 13 into the linear motion of the lifting frame 7. This transmission method has high positioning accuracy and stability, ensuring uniform and reliable sealing pressure between the sealing cap 8 and the inner test cylinder 4.

[0026] In actual operation, the battery to be tested is first placed into the inner test cylinder 4, and then the inner test cylinder 4 containing the battery is placed into the outer test cylinder 3. After the drive device 6 is started, the lifting frame 7 lowers the sealing cover 8 until the sealing cover 8 is in tight contact with the opening of the inner test cylinder 4. During this process, the sealing element 11 is compressed to form a reliable sealing environment. At the same time, the electrical connection terminal 12 on the sealing cover 8 is automatically connected to the battery electrode, completing the circuit conduction.

[0027] The gas generated during battery operation is conducted to the tester 9 through the guide hole 10 on the sealing cover 8. The tester 9 monitors and records the gas pressure changes in real time. After the test is completed, the drive device 6 drives the lifting frame 7 to rise, and the sealing cover 8 separates from the inner test cylinder 4. At this time, the inner test cylinder 4 and the battery can be easily removed. The entire testing process is simple to operate and greatly improves the testing efficiency.

[0028] The apparatus of this embodiment is particularly suitable for studying the gas generation characteristics of high-nickel, high-silicon batteries. Since these batteries generate a significant amount of gas during charging and discharging, accurately measuring their gas generation pressure is crucial for evaluating battery performance and safety. Through optimized structural design, the apparatus overcomes the inconvenience of battery handling in traditional testing devices, significantly improving testing efficiency.

[0029] The inner test cylinder 4 in the device can be removed separately for cleaning or replacement, avoiding frequent cleaning of the outer test cylinder 3 and reducing maintenance workload. The lifting and lowering movement of the sealing cover 8 is driven by the lead screw 13, ensuring the uniformity and repeatability of the sealing pressure. The setting of the electrical connection terminal 12 allows for convenient charge and discharge testing of the battery, while monitoring changes in gas production pressure.

[0030] Example 3:

[0031] like Figures 1-4 As shown, the drive device 6 in this embodiment includes a drive motor 14 and a locking mechanism 15, which is fixedly connected to the lead screw 13. The locking mechanism 15 is used to lock the lead screw 13 after the lifting frame 7 descends to the sealing cover 8 to cover the inner cylinder 4 of the pressure test, to prevent the sealing cover 8 from loosening and to ensure the accuracy of the battery gas pressure detection.

[0032] In the specific implementation process, the drive motor 14 drives the lead screw 13 to rotate through the transmission mechanism. The rotation of the lead screw 13 is converted into the linear motion of the lifting frame 7, causing the lifting frame 7 to move up and down along the slide rail 5. When the lifting frame 7 descends to the point where the sealing cover 8 contacts the test inner cylinder 4, the sealing element 11 of the sealing cover 8 forms a tight fit with the opening of the test inner cylinder 4, ensuring the airtightness of the test environment. At this time, the locking mechanism 15 is activated to lock the lead screw 13, preventing the lead screw 13 from undergoing slight displacement due to external vibration or changes in the internal air pressure of the battery, thereby avoiding gas leakage or pressure measurement errors caused by the loosening of the sealing cover 8.

[0033] The locking mechanism 15 can employ an electromagnetic brake or a mechanical caliper structure. In the electromagnetic brake configuration, when the lifting frame 7 reaches the predetermined position, the control system sends a signal to the electromagnetic brake, causing it to clamp the lead screw 13 and prevent further rotation. In the mechanical caliper configuration, the locking mechanism 15 uses a spring or hydraulically driven caliper to clamp the lead screw 13, achieving locking. Regardless of the method used, the locking mechanism 15 must have a rapid response capability to ensure that the sealing cover 8 is immediately fixed after being pressed, avoiding seal failure due to delayed locking.

[0034] During the test, the battery undergoes a chemical reaction inside the inner test cylinder 4, generating gas. This gas enters the tester 9 through the guide hole 10 of the sealing cover 8, and the tester 9 monitors the gas pressure changes in real time. Due to the locking mechanism 15, the sealing cover 8 remains stably pressed throughout the test, ensuring the sealing of the inner test cylinder 4 is not disturbed, thereby improving the accuracy and repeatability of the pressure test. After the test is completed, the drive motor 14 rotates in the reverse direction, the locking mechanism 15 is released, the lifting frame 7 rises, and the sealing cover 8 separates from the inner test cylinder 4, facilitating the removal of the battery and cleaning of the inner test cylinder 4.

[0035] Example 4:

[0036] like Figures 1-4 As shown, the test inner cylinder 4 in this embodiment is made of rubber, a material with good elasticity and sealing performance. The rubber test inner cylinder 4 can accommodate cylindrical batteries of different sizes, and can produce appropriate deformation when the battery is placed inside, thereby achieving stable fixation of the battery. The rubber material also has a certain cushioning effect, which can prevent damage to the battery due to external vibration or impact during testing. The selection of the rubber material for the test inner cylinder 4 needs to consider its resistance to electrolyte corrosion; materials with good chemical stability, such as fluororubber or nitrile rubber, are typically used.

[0037] A flange 16 is provided at the opening of the inner test cylinder 4. This flange 16 extends outward from the cylinder body of the inner test cylinder 4 to form an annular protrusion. The main function of the flange 16 is to provide a contact surface with the sealing cap 8, ensuring that the sealing cap 8 can be smoothly pressed onto the inner test cylinder 4. The width and thickness of the flange 16 are carefully designed to ensure sufficient strength to withstand the sealing pressure while avoiding excessive increase in the overall size of the device. The upper surface of the flange 16 is flattened to ensure uniform contact with the sealing element 11 of the sealing cap 8.

[0038] A raised ring 17 is also provided on the upper surface of the flange 16. The raised ring 17 is located at the inner edge of the flange 16 and is an annular protrusion. Its cross-sectional shape can be semi-circular, trapezoidal, or other shapes suitable for sealing. The main function of the raised ring 17 is to enhance the sealing effect. When the sealing cap 8 is pressed down, the raised ring 17 will first contact the sealing element 11 and undergo compression deformation, forming the first line of sealing defense. This design can significantly improve the sealing pressure and maintain good sealing performance even when high-pressure gas is generated inside the battery during testing.

[0039] Example 5:

[0040] like Figures 1-4As shown, the sealing element 11 in this embodiment is made of rubber. Rubber has good elasticity and deformation capacity. When the sealing cap 8 is pressed against the opening of the test inner cylinder 4 by the driving device 6, the rubber sealing element 11 can fully conform to the edge of the opening of the test inner cylinder 4, forming a reliable sealing contact surface. This elastic deformation characteristic allows the sealing element 11 to adapt to test inner cylinder 4 openings of different sizes, ensuring an effective sealing effect under various working conditions. The rubber material also has excellent chemical corrosion resistance, resisting the erosion of corrosive substances such as electrolyte vapor that may be present in the battery gas.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A device for detecting the gas production pressure of a cylindrical battery, comprising a base on which a support frame is fixedly mounted, characterized in that, The base is provided with a test outer cylinder, and a test inner cylinder is placed inside the test outer cylinder. The upright is fixedly installed with a slide rail and a drive device. The slide rail is movably installed with a lifting frame. The lifting frame is fixedly installed with a sealing cover and a tester. The sealing cover is provided with a guide hole connected to the tester. The sealing cover is fixedly installed with a sealing element. The sealing cover is provided with an electrical connection terminal. The drive device is driven and connected to the lifting frame through a lead screw.

2. The cylindrical battery gas generation pressure detection device according to claim 1, characterized in that, The driving device includes a drive motor and a locking mechanism, and the locking mechanism is fixedly connected to the lead screw.

3. The cylindrical battery gas generation pressure detection device according to claim 1, characterized in that, The test inner cylinder is made of rubber and has a flange with a raised ring.

4. The cylindrical battery gas generation pressure detection device according to claim 1, characterized in that, The sealing element is made of rubber.

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