Aging jig for aluminum electrolytic capacitors

Abstract

This application relates to the field of aging equipment technology for aluminum electrolytic capacitors. The aging fixture for the aluminum electrolytic capacitor includes: a sealed chamber; a gas collection module; and an intermittent ventilation module. In order to solve the problem in the prior art that ordinary aging fixture equipment causes gas to be generated by the capacitor when applying rated voltage and high temperature to aluminum electrolytic capacitors, and the subsequent gas accumulation leads to accidents, this application designs a gas collection module and an intermittent ventilation module. By using the gas collection module and the intermittent ventilation module in combination, intermittent ventilation can be performed when applying rated voltage and high temperature, thereby helping to collect the gas generated by the capacitor and avoiding accidents. Moreover, compared with ordinary continuous ventilation equipment, intermittent ventilation effectively avoids temperature instability caused by excessive ventilation, helps maintain temperature uniformity, and is suitable for widespread use.

Description

Technical Field

[0001] This application relates to the field of aluminum electrolytic capacitor aging technology, and in particular to aging fixtures for aluminum electrolytic capacitors. Background Technology

[0002] As a key component widely used in electronic devices, the long-term reliability and lifespan of aluminum electrolytic capacitors are directly related to the stability of the entire product.

[0003] During the production process, aging testing is a key step in evaluating the performance of aluminum electrolytic capacitors and screening for early failures. This test typically applies the rated operating voltage to the capacitor at a high temperature to simulate long-term use conditions, thereby accelerating internal electrochemical reactions and exposing potential defects.

[0004] However, during the high-temperature and high-pressure aging process, the electrolyte inside the capacitor will continue to decompose and produce gases such as hydrogen and oxygen. If the gas cannot be discharged in time, it may cause the capacitor shell to bulge or even burst, resulting in test interruption and equipment damage. Hydrogen is flammable. When it accumulates in a confined space to reach a critical concentration, it may explode when it comes into contact with a spark or high temperature, threatening operational safety.

[0005] To address the issue of gas accumulation, some fixtures employ a continuous ventilation design. However, continuous airflow carries away a significant amount of heat, disrupting the uniformity and stability of the temperature field within the aging chamber. Temperature fluctuations can lead to inaccurate test data and reduce screening reliability.

[0006] In other words, existing technologies have the following technical problems: ordinary aging test fixtures are prone to the risk of gas not being able to escape in a timely manner during use. Therefore, an aging fixture for aluminum electrolytic capacitors is proposed to address the above problems. Summary of the Invention

[0007] This embodiment provides an aging fixture for aluminum electrolytic capacitors to solve the problem that ordinary aging test fixtures in the prior art are prone to gas not being able to be discharged in time during use.

[0008] According to one aspect of this application, an aging fixture for aluminum electrolytic capacitors is provided, the aging fixture for aluminum electrolytic capacitors comprising:

[0009] A sealed chamber is fixedly installed on the upper surface of a fixed base plate. A support base is fixedly installed in the inner cavity of the sealed chamber, and a capacitor fixing module is installed on the upper surface of the support base.

[0010] The capacitor fixing module is used to fix the capacitor;

[0011] A gas collection module is fixedly installed on the upper surface of the sealed chamber, and the gas collection module is used to collect the generated gas;

[0012] An intermittent ventilation module is fixedly installed on the side wall of the sealed chamber and is used to provide intermittent ventilation for the capacitor.

[0013] Furthermore, the support base has an internal cavity, and several air holes are provided on the upper wall of the internal cavity.

[0014] Furthermore, the gas collection module includes a fixed chamber, a gas collection bladder, and an air inlet pipe. The fixed chamber is fixedly disposed on the upper surface of the sealed chamber. A gas collection bladder is disposed in the inner cavity of the fixed chamber. One end of the air inlet pipe is fixedly connected to the inner cavity of the gas collection bladder. The other end of the air inlet pipe extends into the inner cavity of the sealed chamber. A check valve is installed on the air inlet pipe.

[0015] Furthermore, the capacitor fixing module includes a fixing plate, a fixing sleeve, a contact piece, and an anti-loosening unit. The fixing plate is fixedly installed on the upper surface of the support base, and fixing sleeves are installed on both sides of the upper surface of the fixing plate.

[0016] Furthermore, a plurality of electrical contacts are provided in the inner cavity of the fixed sleeve, and the plurality of electrical contacts are arranged in a ring in the inner cavity of the fixed sleeve.

[0017] Furthermore, the anti-loosening unit includes a compression plate, a circular fixed shell, a first movable slider, a second movable slider, a spring, and an adjusting screw. The first movable slider is disposed in the inner cavity of the circular fixed shell and slides in cooperation with the circular fixed shell. The circular fixed shell is fixedly disposed on the bottom surface of the support base. Compression plates are fixedly disposed on both sides of the upper surface of the first movable slider. The compression plates extend into the inner cavity of the fixed sleeve and contact the contact plate. One side of the compression plate has an inclined structure.

[0018] Furthermore, a second movable slider is slidably connected in the inner cavity of the circular fixed shell. One end of a spring is fixedly connected to the upper surface of the second movable slider, and the other end of the spring is fixedly connected to the bottom surface of the first movable slider. One end of an adjusting screw is rotatably connected to the bottom surface of the second movable slider. The other end of the adjusting screw penetrates the bottom wall of the inner cavity of the circular fixed shell and extends to the outside of the wall. The adjusting screw and the circular fixed shell are threaded together.

[0019] Furthermore, the intermittent ventilation module includes a connecting cylinder, a movable piston, a movable guide rod, and a rotating disk. One end of the connecting cylinder is rotatably connected to the side wall of the sealing chamber. The movable piston is slidably connected in the inner cavity of the connecting cylinder. One end of the movable guide rod is fixedly connected to one side wall of the movable piston. The other end of the movable guide rod passes through the inner wall of the connecting cylinder and extends to the outside of the wall.

[0020] Furthermore, an air inlet pipe and an output hose are fixedly connected to the inner cavity of the connecting cylinder. Both the air inlet pipe and the output hose are equipped with check valves. One end of the output hose extends into the inner cavity of the support base and is fixedly connected to the support base.

[0021] Furthermore, the rotating disk is disposed on the side wall of the fixed stand and is rotatably connected to the fixed stand. The fixed stand is fixedly disposed on the upper surface of the fixed base plate. One end of the moving guide rod is rotatably connected to the side wall of the rotating disk. A servo motor is fixedly connected to the side wall of the fixed stand, and the end of the output shaft of the servo motor is fixedly connected to the center of the rotating disk.

[0022] In order to solve the problem in the prior art where ordinary aging fixture equipment generates gas in aluminum electrolytic capacitors when applying rated voltage and high temperature, and the subsequent gas accumulation leads to accidents, this application designs a gas collection module and an intermittent ventilation module. By using the gas collection module and the intermittent ventilation module together, intermittent ventilation can be performed when applying rated voltage and high temperature, which helps to collect the gas generated by the capacitor and avoid accidents. Moreover, compared with ordinary continuous ventilation equipment, intermittent ventilation effectively avoids temperature instability caused by excessive ventilation and helps maintain temperature uniformity, making it suitable for widespread use. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall internal structure of one embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the overall external structure of one embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the internal front view structure of one embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the structure of a capacitor fixing module according to an embodiment of this application;

[0028] Figure 5 This is one embodiment of the present application. Figure 4 A magnified schematic diagram of the structure at point A;

[0029] Figure 6 This is a schematic diagram of the structure of an intermittent ventilation module according to an embodiment of this application.

[0030] In the picture:

[0031] Fixed base plate 1, sealing chamber 2, chamber cover 201, support base 3, air hole 301, bracket 4; capacitor fixing module 5, fixing plate 501, fixing sleeve 502, electrical contact piece 503, extrusion piece 504, circular fixing shell 505, first moving slider 506, second moving slider 507, spring 508, adjusting screw 509; capacitor 6; gas collection module 7, fixed chamber 701, gas collection bag 702, air inlet pipe 703; intermittent ventilation module 8, connecting cylinder 801, moving piston 802, moving guide rod 803, fixed foot 804, rotating disk 805, servo motor 806, air inlet pipe 807, output hose 808. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0033] Please see Figure 1-6 As shown, an aging fixture for aluminum electrolytic capacitors includes:

[0034] A sealed chamber 2 is fixedly installed on the upper surface of a fixed base plate 1. A support base 3 is fixedly installed in the inner cavity of the sealed chamber 2, and a capacitor fixing module 5 is installed on the upper surface of the support base 3.

[0035] The capacitor fixing module 5 is used to fix the capacitor 6;

[0036] Gas collection module 7 is fixedly installed on the upper surface of the sealed chamber 2, and is used to collect the generated gas;

[0037] Intermittent ventilation module 8 is fixedly installed on the side wall of the sealed chamber 2, and is used to intermittently ventilate the capacitor 6.

[0038] Through the above technical solution, by using the gas collection module 7 and the intermittent ventilation module 8 together, intermittent ventilation can be carried out when the rated voltage and high temperature are applied, which helps to collect the gas generated by the capacitor, avoids accidents, and compared with ordinary continuous ventilation equipment, intermittent ventilation effectively avoids temperature instability caused by excessive ventilation, helps to maintain temperature uniformity, and is suitable for widespread use.

[0039] The support base 3 has an internal cavity, and a plurality of air holes 301 are provided on the upper wall of the internal cavity of the support base 3.

[0040] Preferably, the cover 201 is hinged or detachably mounted at the top opening of the sealed chamber 2 for opening or closing the sealed chamber 2 to facilitate the placement or removal of the capacitor 6; when the cover 201 is closed, its edge is provided with a sealing ring to ensure that the internal environment of the sealed chamber 2 is sealed and to prevent gas leakage.

[0041] The gas collection module 7 includes a fixed chamber 701, a gas collection bladder 702, and an air inlet pipe 703. The fixed chamber 701 is fixedly disposed on the upper surface of the sealed chamber 2. The gas collection bladder 702 is disposed in the inner cavity of the fixed chamber 701. One end of the air inlet pipe 703 is fixedly connected to the inner cavity of the gas collection bladder 702. The other end of the air inlet pipe 703 extends into the inner cavity of the sealed chamber 2. A check valve is installed on the air inlet pipe 703. Through this technical solution, when the capacitor generates gas due to high temperature, the gas can enter the interior of the gas collection bladder 702 through the air inlet pipe 703, thereby realizing the gas collection function.

[0042] The capacitor fixing module 5 includes a fixing plate 501, a fixing sleeve 502, a contact piece 503, and an anti-loosening unit. The fixing plate 501 is fixedly installed on the upper surface of the support base 3, and the fixing sleeve 502 is installed on both sides of the upper surface of the fixing plate 501.

[0043] The inner cavity of the fixed sleeve 502 is provided with a contact piece 503, and a plurality of contact pieces 503 are provided, which are arranged in a ring in the inner cavity of the fixed sleeve 502.

[0044] The anti-loosening unit includes a pressing plate 504, a circular fixed shell 505, a first movable slider 506, a second movable slider 507, a spring 508, and an adjusting screw 509. The first movable slider 506 is disposed in the inner cavity of the circular fixed shell 505 and slides with the circular fixed shell 505. The circular fixed shell 505 is fixedly disposed on the bottom surface of the support base 3. Pressing plates 504 are fixedly disposed on both sides of the upper surface of the first movable slider 506. The pressing plates 504 extend into the inner cavity of the fixed sleeve 502 and contact the contact plate 503. One side of the pressing plate 504 has an inclined structure.

[0045] A second movable slider 507 is slidably connected within the inner cavity of the circular fixed shell 505. One end of a spring 508 is fixedly connected to the upper surface of the second movable slider 507. The other end of the spring 508 is fixedly connected to the bottom surface of the first movable slider 506. One end of an adjusting screw 509 is rotatably connected to the bottom surface of the second movable slider 507. The other end of the adjusting screw 509 penetrates the bottom wall of the inner cavity of the circular fixed shell 505 and extends outside the wall. The adjusting screw 509 and the circular fixed shell 505 are threaded together. This technical solution achieves... Manually rotating the adjusting screw 509 can move the second movable slider 507, thereby pushing the spring 508 to contract. The elasticity generated by the contraction of the spring 508 can then push the first movable slider 506 to move, thereby moving the pressing plate 504. The movement of the pressing plate 504 can cause the contact plate 503 to tighten inward, thus making full contact with the pin of the capacitor 6 and keeping it secure. The spring 508 plays a role in continuous elastic compression, which can keep the contact point stable when the temperature changes, avoiding failure caused by poor contact.

[0046] In practice, the contact piece 503 is electrically connected to an external power source via a wire (not shown) to apply a rated voltage to the pins of the capacitor 6; the connection point of the wire is located outside the fixed sleeve 502 and is isolated from the adjustment mechanism of the adjusting screw 509 to ensure the stability of the electrical connection when the temperature changes.

[0047] When the extrusion plate 504 is driven by the adjusting screw 509, the contact plate 503 maintains close contact with the lead of the capacitor 6 under the elastic action of the spring 508, preventing poor contact caused by vibration or thermal expansion and contraction during voltage application.

[0048] The intermittent ventilation module 8 includes a connecting cylinder 801, a movable piston 802, a movable guide rod 803, and a rotating disk 805. One end of the connecting cylinder 801 is rotatably connected to the side wall of the sealing chamber 2. The movable piston 802 is slidably connected in the inner cavity of the connecting cylinder 801. One end of the movable guide rod 803 is fixedly connected to one side wall of the movable piston 802. The other end of the movable guide rod 803 passes through the inner wall of the connecting cylinder 801 and extends to the outside of the wall.

[0049] An air inlet pipe 807 and an output hose 808 are fixedly connected in the inner cavity of the connecting cylinder 801. Both the air inlet pipe 807 and the output hose 808 are equipped with check valves. One end of the output hose 808 extends into the inner cavity of the support base 3 and is fixedly connected to the support base 3.

[0050] The rotating disk 805 is disposed on the side wall of the fixed stand 804 and rotatably connected to the fixed stand 804. The fixed stand 804 is fixedly disposed on the upper surface of the fixed base plate 1. One end of the moving guide rod 803 is rotatably connected to the side wall of the rotating disk 805. A servo motor 806 is fixedly connected to the side wall of the fixed stand 804. The output shaft end of the servo motor 806 is fixedly connected to the center of the rotating disk 805. Through this technical solution, the servo motor 806 can control the rotating disk 805 to rotate, thereby driving the moving guide rod 803 to move in the opposite direction. The piston moves back and forth, causing the piston 802 to move reciprocally within the cavity of the connecting cylinder 801. When the piston 802 moves downward, it can draw in external gas through the air inlet pipe 807. When the piston 802 moves upward, it can output gas through the output hose 808 and deliver it to the cavity of the support base 3. The gas is then ejected through the air hole 301, thereby generating an upward airflow. This causes the gas generated by the capacitor 6 to move upward and enter the gas collection module 7 for collection. Through intermittent ventilation, the temperature instability caused by excessive ventilation is effectively avoided.

[0051] Preferably, a heating element is installed on the inner wall of the sealed chamber 2. The heating element can be a heating wire to apply a high-temperature environment. The temperature of the heating element is controlled by an external temperature controller and kept within a preset range to simulate the aging conditions of aluminum electrolytic capacitors. The power cord of the heating element is connected to an external control system to ensure temperature uniformity and avoid heat loss due to intermittent ventilation.

[0052] Specifically, the servo motor 806 is controlled by an external controller, which can be a PLC or a timing circuit, and operates in a preset intermittent mode.

[0053] In Example 1, the controller starts the servo motor 806 every 5 minutes, driving the rotating disk 805 to rotate 180 degrees, which in turn drives the moving guide rod 803 to make the moving piston 802 complete one reciprocating motion, thereby achieving intermittent ventilation. The duration of each ventilation is adjustable, ensuring that the airflow pushes the gas upward into the gas collection bag 702 while maintaining the temperature stability inside the sealed chamber 2.

[0054] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An aging fixture for aluminum electrolytic capacitors, characterized in that: The aging fixture for the aluminum electrolytic capacitor includes: A sealed chamber (2) is fixedly installed on the upper surface of a fixed base plate (1). A support seat (3) is fixedly installed in the inner cavity of the sealed chamber (2). A capacitor fixing module (5) is installed on the upper surface of the support seat (3). The capacitor fixing module (5) is used to fix the capacitor (6); Gas collection module (7), which is fixedly installed on the upper surface of the sealed chamber (2), is used to collect the generated gas; Intermittent ventilation module (8) is fixedly installed on the side wall of the sealed chamber (2) and is used to provide intermittent ventilation for the capacitor (6).

2. The aging fixture for aluminum electrolytic capacitors according to claim 1, characterized in that: The support base (3) has an internal cavity, and several air holes (301) are provided on the upper wall of the internal cavity of the support base (3).

3. The aging fixture for aluminum electrolytic capacitors according to claim 1, characterized in that: The gas collection module (7) includes a fixed chamber (701), a gas collection bag (702), and an air inlet pipe (703). The fixed chamber (701) is fixedly installed on the upper surface of the sealed chamber (2). The gas collection bag (702) is installed in the inner cavity of the fixed chamber (701). One end of the air inlet pipe (703) is fixedly connected to the inner cavity of the gas collection bag (702). The other end of the air inlet pipe (703) extends into the inner cavity of the sealed chamber (2). A check valve is installed on the air inlet pipe (703).

4. The aging fixture for aluminum electrolytic capacitors according to claim 3, characterized in that: The capacitor fixing module (5) includes a fixing plate (501), a fixing sleeve (502), a contact piece (503), and an anti-loosening unit. The fixing plate (501) is fixedly installed on the upper surface of the support base (3), and fixing sleeves (502) are installed on both sides of the upper surface of the fixing plate (501).

5. The aging fixture for aluminum electrolytic capacitors according to claim 4, characterized in that: The inner cavity of the fixed sleeve (502) is provided with a contact plate (503), and there are several contact plates (503) arranged in a ring in the inner cavity of the fixed sleeve (502).

6. The aging fixture for aluminum electrolytic capacitors according to claim 4, characterized in that: The anti-loosening unit includes a compression plate (504), a circular fixed shell (505), a first movable slider (506), a second movable slider (507), a spring (508), and an adjusting screw (509). The first movable slider (506) is disposed in the inner cavity of the circular fixed shell (505) and slides with the circular fixed shell (505). The circular fixed shell (505) is fixedly disposed on the bottom surface of the support base (3). Compression plates (504) are fixedly disposed on both sides of the upper surface of the first movable slider (506). The compression plates (504) extend into the inner cavity of the fixed sleeve (502) and contact the contact plate (503). One side of the compression plate (504) has an inclined structure.

7. The aging fixture for aluminum electrolytic capacitors according to claim 6, characterized in that: A second movable slider (507) is slidably connected in the inner cavity of the circular fixed shell (505). One end of a spring (508) is fixedly connected to the upper surface of the second movable slider (507). The other end of the spring (508) is fixedly connected to the bottom surface of the first movable slider (506). One end of an adjusting screw (509) is rotatably connected to the bottom surface of the second movable slider (507). The other end of the adjusting screw (509) penetrates the bottom wall of the inner cavity of the circular fixed shell (505) and extends to the outside of the wall. The adjusting screw (509) and the circular fixed shell (505) are threaded together.

8. The aging fixture for aluminum electrolytic capacitors according to claim 1, characterized in that: The intermittent ventilation module (8) includes a connecting cylinder (801), a movable piston (802), a movable guide rod (803), and a rotating disk (805). One end of the connecting cylinder (801) is rotatably connected to the side wall of the sealing chamber (2). The movable piston (802) is slidably connected in the inner cavity of the connecting cylinder (801). One end of the movable guide rod (803) is fixedly connected to one side wall of the movable piston (802). The other end of the movable guide rod (803) penetrates the inner wall of the connecting cylinder (801) and extends to the outside of the wall.

9. The aging fixture for aluminum electrolytic capacitors according to claim 8, characterized in that: An air inlet pipe (807) and an output hose (808) are fixedly connected in the inner cavity of the connecting cylinder (801). Both the air inlet pipe (807) and the output hose (808) are equipped with check valves. One end of the output hose (808) extends into the inner cavity of the support base (3) and is fixedly connected to the support base (3).

10. The aging fixture for aluminum electrolytic capacitors according to claim 8, characterized in that: The rotating disk (805) is located on the side wall of the fixed stand (804) and is rotatably connected to the fixed stand (804). The fixed stand (804) is fixedly located on the upper surface of the fixed base plate (1). One end of the moving guide rod (803) is rotatably connected to the side wall of the rotating disk (805). A servo motor (806) is fixedly connected to the side wall of the fixed stand (804). The end of the output shaft of the servo motor (806) is fixedly connected to the center of the rotating disk (805).

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