A temperature-adjustable helium inspection fixture device

Abstract

The utility model relates to a temperature-adjustable helium inspection fixture device, which is used to inspect a battery cover with a sealing gasket, wherein the battery cover has a pole bottom plate; the fixture device includes an upper plate, a lower plate, a temperature sensor, an electric heating patch and a frame, wherein the electric heating patch is located on the lower surface of the upper plate and is used to heat the pole bottom plate, and the temperature sensor is installed on the lower plate and is used to detect the temperature of the sealing gasket. The temperature-adjustable helium inspection fixture device has a simple and ingenious structure, and is provided with an upper plate, a lower plate, a temperature sensor, an electric heating patch and a frame, wherein the electric heating patch is installed on the upper plate, the temperature sensor is installed on the lower plate, and then the battery cover with the sealing gasket is installed between the temperature sensor and the electric heating patch, the pole bottom plate is heated by the electric heating patch, and the temperature sensor detects the temperature, thereby studying the influence of temperature on the sealing performance, optimizing the design parameters of the sealing gasket, improving the sealing reliability, and enhancing the user experience.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a temperature-adjustable helium inspection fixture device. Background Art

[0002] Lithium batteries are a type of chemical power source that uses lithium metal or lithium ions as electrode materials. They have the characteristics of high energy density, long life, low self-discharge rate, and fast charging capability. Lithium batteries are widely used in many fields such as portable electronic devices, electric vehicles, and energy storage systems.

[0003] In the production and use of lithium batteries, the performance of sealing gaskets is crucial to the airtightness and safety of the battery. An important means of evaluating the performance of sealing gaskets is helium testing, which determines the airtightness of the battery by testing the leakage rate of the battery under a certain pressure of helium.

[0004] However, the performance of the sealing gasket will be significantly affected by temperature. On the one hand, temperature will change the mechanical properties of the sealing gasket material, such as compression rebound performance and stress relaxation performance. As the temperature rises, the sealing gasket will become softer, the compression amount will increase, the rebound force will decrease, and stress relaxation may occur if it is under pressure for a long time, resulting in a decrease in the contact stress of the sealing surface. On the other hand, temperature will also cause thermal expansion or contraction of the sealing gasket material, causing its size to change, which in turn affects the matching state with the battery cover and shell.

[0005] The above temperature effect will be directly reflected in the helium test results. Lithium batteries undergo multiple high-temperature processes during production, such as liquid injection, formation, welding, etc. These processes will cause the temperature of the sealing gasket to rise instantly, causing dynamic changes in its compression. If helium testing is performed at room temperature, it is impossible to evaluate the sealing performance under these high-temperature process conditions.

[0006] In view of the complex influence of temperature on the performance of sealing gaskets and the results of helium inspection, it is necessary to develop an adjustable temperature helium inspection device to simulate various temperature conditions during battery production and use, and comprehensively evaluate the airtight performance of sealing gaskets. This can not only optimize the design parameters of sealing gaskets such as compression rate and contact size, but also provide a basis for production process optimization and reduce the airtightness defect rate. Utility Model Content

[0007] In order to overcome the defects in the above-mentioned prior art, the utility model aims to provide a temperature-adjustable helium detection fixture device. The fixture device has a simple and ingenious structure and is easy to operate. By setting an electric heating patch and a temperature sensor, the temperature-adjustable function of the helium detection fixture can be realized, the temperature detection range is expanded, and the design parameters of the sealing gasket can be optimized according to the detection results, thereby improving the sealing reliability and enhancing the user experience, which is conducive to the promotion and application of the above-mentioned fixture device in the market.

[0008] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a temperature-adjustable helium inspection fixture device, used to detect a battery cover with a sealing gasket, the battery cover having a pole bottom plate; the fixture device includes an upper plate, a lower plate, a temperature sensor, an electric heating patch and a frame, the electric heating patch is located on the lower surface of the upper plate and is used to heat the pole bottom plate, and the temperature sensor is installed on the lower plate and is used to perform temperature detection on the sealing gasket.

[0009] As a preferred solution of the utility model, the electric heating patch adopts a ring-shaped design and is closely attached to the lower surface of the upper plate.

[0010] As a preferred solution of the utility model, the lower plate is provided with a reserved hole, and the temperature sensor is installed in the reserved hole.

[0011] As a preferred solution of the present utility model, the temperature sensor adopts M6 thread type and is installed in the reserved hole.

[0012] As a preferred solution of the utility model, the distance between the upper plate and the lower plate can be adjusted by a driving mechanism and both are installed on the inner side of the frame.

[0013] As a preferred solution of the utility model, the driving mechanism is a cylinder, a cylinder mounting plate is installed on the top of the frame, and the cylinder is installed on the cylinder mounting plate and drives the upper plate.

[0014] As a preferred solution of the utility model, a guide column is installed below the upper plate, and correspondingly, the lower plate is provided with a guide hole, and the guide column can be slidably installed in the guide hole.

[0015] As a preferred solution of the utility model, a guide column is installed above the lower plate, and correspondingly, a guide hole is opened in the upper plate, and the guide column can be slidably installed in the guide hole.

[0016] As a preferred solution of the utility model, the upper plate is formed with a first mounting position for the battery cover to be embedded, and the lower plate is formed with a second mounting position corresponding to the first mounting position.

[0017] As a preferred solution of the utility model, a vacuum tube is installed at the bottom of the lower plate.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: an adjustable temperature helium detection fixture device in the utility model has a simple and ingenious structure. By arranging an upper plate, a lower plate, a temperature sensor, an electric heating patch and a frame, the electric heating patch is installed on the upper plate, the temperature sensor is installed on the lower plate, and then the battery cover with a sealing gasket is installed between the temperature sensor and the electric heating patch. The pole bottom plate is heated by the electric heating patch, and the temperature sensor performs temperature detection, so as to study the influence of temperature on the sealing performance, optimize the design parameters of the sealing gasket, improve the sealing reliability, enhance the user experience, and facilitate the promotion and application of the above-mentioned fixture device in the market.

[0019] Furthermore, the utility model can realize automatic adjustment of the position of the upper plate or the lower plate by arranging a driving mechanism, thereby ensuring the tightness of the upper and lower parts of the battery cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a temperature-adjustable helium inspection fixture device in an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a temperature-adjustable helium inspection fixture device in an embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the battery cover plate implemented in the utility model;

[0023] Figure 4 It is a structural schematic diagram of the middle upper plate implemented in the utility model;

[0024] Figure 5 It is a structural schematic diagram of the middle and lower plates implemented in the utility model.

[0025] Figure numerals: 1. Upper plate; 1-1. Mounting position one; 2. Lower plate; 2-1. Reserved hole; 2-2. Mounting position two; 3. Vacuum tube; 4. Temperature sensor; 5. Guide column; 6. Heating patch; 7. Frame; 8. Cylinder mounting plate; 9. Guide hole; 10. Sealing gasket; 11. Battery cover; 12. Pole bottom plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below by specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0028] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0029] The existing helium inspection fixture cannot detect the airtightness of lithium battery cover plates at different temperatures, and the existing temperature-controlled helium inspection equipment is expensive. In addition, the impact of temperature changes during the lithium battery production process on the sealing performance is still unclear.

[0030] Embodiment 1: In order to solve the above technical problems, Figures 1 to 5 As shown, a temperature-adjustable helium inspection fixture device in this embodiment is used to detect the airtightness of a battery cover plate 11 having a sealing gasket 10, specifically to detect the sealing at the sealing gasket 10, so as to ensure the performance of the battery. The battery cover plate 11 has a pole bottom plate 12. The pole bottom plate 12 in the battery generally refers to a metal plate or metal frame that connects the positive and negative poles (the poles are the exposed parts of the positive and negative electrodes of the battery, used to connect the external circuit) to the internal electrodes of the battery (such as positive electrode materials and negative electrode materials). The function of the pole bottom plate 12 is to ensure the stability of the electrical connection inside the battery, while providing mechanical support to ensure the integrity of the battery structure. In order to simplify the structure of the helium inspection fixture, thereby reducing the manufacturing cost, and then reducing the user's use cost. The fixture device in this embodiment is mainly composed of an upper plate 1, a lower plate 2, a temperature sensor 4, an electric heating patch 6 and a frame 7. The upper plate 1, the lower plate 2 and the frame 7 have simple structures and are easy to manufacture. The electric heating patch 6 is located on the lower surface of the upper plate 1 and is used to heat the pole bottom plate 12. The temperature sensor 4 is installed on the lower plate 2 and is used to detect the temperature of the sealing gasket 10. The electric heating patch 6 can adjust the temperature as needed. The electric heating patch 6 is located on one side of the battery cover 11 as a leak detection side, and the other side as a gas supply side. A vacuum tube 3 is installed at the bottom of the lower plate 2, and the vacuum tube 3 is connected to the upper part of the lower plate 2. The vacuum tube 3 is used to evacuate air to further ensure the airtightness between the upper plate 1 and the lower plate 2.

[0031] The helium detection fixture device in this embodiment realizes a low-cost adjustable temperature helium detection function by installing an electric heating patch 6 on the leak detection side to adjust the temperature and installing a temperature sensor 4 on the gas supply side to measure the temperature. Using this device, the airtightness of the battery cover 11 can be evaluated at different temperatures, and the influence of temperature on the sealing performance of the sealing gasket 10 or the sealing gasket can be studied. For the key temperature nodes in the lithium battery production process (such as laser welding, baking, etc.), the airtightness of the battery cover 11 is tested, and the influence of temperature changes on the sealing performance is estimated, thereby optimizing the design parameters of the sealing gasket 10, extending the battery life, reducing the use cost, and enhancing the user experience.

[0032] Since the sealing gasket 10 is usually annular, in this embodiment, in order to ensure the heating effect while reducing the impact of temperature on other parts of the battery, the above-mentioned electric heating patch 6 adopts an annular design and is closely attached to the lower surface of the above-mentioned upper plate 1. The annular design helps to provide a more uniform heating effect because it can heat around a central area or component, thereby reducing hot spots and cold spots and ensuring the consistency of the heating process. Placing the above-mentioned electric heating patch 6 closely to the lower surface of the above-mentioned upper plate 1 can reduce the loss of heat during the transfer process, improve thermal efficiency, and can also reach the required heating temperature faster while reducing energy consumption.

[0033] The lower plate 2 is provided with a reserved hole 2-1, and the temperature sensor 4 is installed in the reserved hole 2-1. The position of the reserved hole 2-1 can ensure that the temperature sensor 4 is close to or close to the component to be monitored, such as the sealing gasket 10, so as to obtain a more accurate temperature reading. By installing the temperature sensor 4 in the reserved hole 2-1, a protective installation environment can also be provided for the temperature sensor 4 to prevent it from being physically damaged. The reserved hole 2-1 can be used as a fixing point for the temperature sensor 4 to ensure that the position of the temperature sensor 4 in the fixture device is accurate, which is convenient for installation and maintenance. The design of the reserved hole 2-1 can optimize the spatial layout of the fixture device, so that the installation of the temperature sensor 4 does not occupy additional space, and does not affect the functions of other components, so that the overall structure of the fixture device is compact and occupies less space.

[0034] The above-mentioned reserved hole 2-1 can be a threaded hole, and the above-mentioned temperature sensor 4 adopts M6 thread type and is directly embedded in the above-mentioned reserved hole 2-1. The threaded design allows the temperature sensor 4 to be quickly installed and fixed in the reserved hole 2-1 by rotation, which simplifies the installation process. The threaded connection provides a mechanical locking mechanism to ensure that the temperature sensor 4 is firmly fixed in the fixture to prevent loosening due to vibration or impact. M6 is a standard thread size, and the use of standardized threads helps to simplify the production and assembly process, and also facilitates the replacement or upgrading of the sensor when necessary. The threaded connection can help to accurately align the temperature sensor 4 and the reserved hole 2-1, ensuring that the contact between the temperature sensor 4 and the monitored area is accurate and consistent.

[0035] In order to facilitate the adjustment of the spacing between the upper plate 1 and the lower plate 2, a driving mechanism is also designed in this embodiment, and the driving mechanism can adjust the upper plate 1 to move toward the lower plate 2 to adjust the distance between the upper plate 1 and the lower plate 2, so as to ensure the tightness of the contact between the upper plate 1 and the lower plate 2. The upper plate 1 and the lower plate 2 are both installed on the inner side of the frame 7. The frame 7 is composed of two vertical plates, which are in an "H" shape with the upper plate 1 or the lower plate 2. The driving mechanism is a cylinder, which is a simple and reliable driving method. It does not require a complex electrical control system and is relatively easy to maintain. The cylinder can respond quickly to the control signal to achieve rapid adjustment of the spacing between the upper plate 1 and the lower plate 2. In order to facilitate the installation of the cylinder, a cylinder mounting plate 8 is installed on the top of the frame 7. By drilling a hole in the cylinder mounting plate 8, the cylinder is fixed to the cylinder mounting plate 8 by fasteners such as fastening bolts and is installed on one side of the upper plate 1 to drive the upper plate 1.

[0036] A guide post 5 is installed below the upper plate 1, and correspondingly, a guide hole 9 is provided in the lower plate 2, and the guide post 5 can be slidably installed in the guide hole 9. The guide post 5 and the guide hole 9 provide precise guidance to ensure that the upper plate 1 and the lower plate 2 maintain linear motion during relative movement to avoid deviation or tilt. The sliding fit can reduce the friction between the upper plate 1 and the lower plate 2, making the drive mechanism smoother when adjusting the spacing. The use of the guide post 5 and the guide hole 7 can simplify the mechanical structure, reduce the number of parts, and reduce the overall complexity. The guide post 5 slides in the guide hole 9, which also helps to improve the stability of the entire device, especially when it is subjected to load or vibration. The design of the guide post 5 and the guide hole 9 facilitates the realization of automated control, and can be coordinated with a cylinder, etc. to improve detection efficiency.

[0037] In order to further ensure the tightness of the installation and thus ensure the detection effect, the upper plate 1 is formed with an installation position 1-1 for the battery cover 11 to be embedded, and the lower plate 2 is formed with an installation position 2-2 corresponding to the position of the installation position 1-1.

[0038] Embodiment 2: The feature that distinguishes this embodiment from Embodiment 1 is that: a temperature-adjustable helium inspection fixture device in this embodiment is provided with a guide column 5 installed above the above-mentioned lower plate 2, and correspondingly, a guide hole 9 is opened in the above-mentioned upper plate 1, and the above-mentioned guide column 5 can be slidably installed in the above-mentioned guide hole 9, so that the distance between the upper plate 1 and the lower plate 2 can be adjusted.

[0039] In the above embodiment, a temperature-adjustable helium inspection fixture device is assembled with the electric heating patch 6 attached to the surface of the upper plate 1; the temperature sensor 4 is directly installed in the reserved hole 2-1 on the lower plate 2, and the pole bottom plate 12 is heated by the electric heating patch 6, and the temperature sensor 4 monitors the temperature, so as to perform helium inspection on the battery cover plate 11 at the target temperature to evaluate its sealing performance at the actual working temperature. Under actual working conditions, the electric heating patch 6 heats the pole bottom plate 12, and the temperature sensor 4 is located at the top of the pole to simulate the actual working condition or ambient temperature, and finally a helium inspection is performed to measure its air tightness. Compared with conventional helium inspection fixtures, only a temperature adjustment module and a temperature measurement module are added, wherein the temperature adjustment module adopts an electric heating patch and the temperature measurement module adopts a temperature sensor. By adding these two modules, the temperature-adjustable function of the helium inspection fixture is realized, the detection temperature range is expanded, and the temperature-adjustable detection function is realized at a lower cost, which has good economy. Compared with the expensive temperature-controlled helium inspection equipment on the market, the temperature-adjustable helium inspection fixture device has a higher cost performance. By using the adjustable temperature helium test fixture, the air tightness test can be performed at a temperature close to the actual working environment of the battery, and the test results are more targeted and have reference value. By evaluating the sealing performance of the battery cover 11 at different temperatures, a basis for optimizing the design is provided.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0041] Although this article uses the following terms more often: 1. upper plate; 1-1. installation position 1; 2. lower plate; 2-1. reserved hole; 2-2. installation position 2; 3. vacuum tube; 4. temperature sensor; 5. guide column; 6. electric heating patch; 7. rack; 8. cylinder mounting plate; 9. guide hole; 10. sealing gasket; 11. battery cover; 12. pole bottom plate, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A temperature-adjustable helium inspection fixture device, characterized in that: Used for detecting a battery cover plate (11) having a sealing gasket (10), the battery cover plate (11) having a pole bottom plate (12); the fixture device comprises an upper plate (1), a lower plate (2), a temperature sensor (4), an electric heating patch (6) and a frame (7), the electric heating patch (6) being located on the lower surface of the upper plate (1) and being used for heating the pole bottom plate (12), and the temperature sensor (4) being installed on the lower plate (2) and being used for detecting the temperature of the sealing gasket (10).

2. The temperature-adjustable helium inspection fixture device according to claim 1, characterized in that: The electric heating patch (6) is of an annular design and is closely attached to the lower surface of the upper plate (1).

3. The temperature-adjustable helium inspection fixture device according to claim 1, characterized in that: The lower plate (2) is provided with a reserved hole (2-1), and the temperature sensor (4) is installed in the reserved hole (2-1).

4. The temperature-adjustable helium inspection fixture device according to claim 3, characterized in that: The temperature sensor (4) is of M6 thread type and is installed in the reserved hole (2-1).

5. The temperature-adjustable helium inspection fixture device according to claim 1, characterized in that: The distance between the upper plate (1) and the lower plate (2) can be adjusted by a driving mechanism and both are mounted on the inner side of the frame (7).

6. The temperature-adjustable helium inspection fixture device according to claim 5, characterized in that: The driving mechanism is a cylinder, a cylinder mounting plate (8) is mounted on the top of the frame (7), and the cylinder is mounted on the cylinder mounting plate (8) and drives the upper plate (1).

7. The temperature-adjustable helium inspection fixture device according to claim 5, characterized in that: A guide column (5) is installed below the upper plate (1), and correspondingly, a guide hole (9) is opened on the lower plate (2), and the guide column (5) can be slidably installed in the guide hole (9).

8. The temperature-adjustable helium inspection fixture device according to claim 5, characterized in that: A guide column (5) is installed above the lower plate (2), and correspondingly, a guide hole (9) is opened on the upper plate (1), and the guide column (5) can be slidably installed in the guide hole (9).

9. The temperature-adjustable helium inspection fixture device according to claim 1, characterized in that: The upper plate (1) is formed with a mounting position 1 (1-1) for the battery cover plate (11) to be embedded, and the lower plate (2) is formed with a mounting position 2 (2-2) corresponding to the position of the mounting position 1 (1-1).

10. The temperature-adjustable helium inspection fixture device according to claim 1, characterized in that: A vacuum tube (3) is installed at the bottom of the lower plate (2).

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