Auxiliary monitoring device for super capacitor detection

By adding thermocouple detectors and temperature conducting elements to the supercapacitor test bench, the problem of monitoring abnormal temperature rise of supercapacitors was solved, safe and reliable temperature detection and early warning were achieved, and the risk of explosion was reduced.

CN223485323UActive Publication Date: 2025-10-28ZHAOQING BERYL ELECTRONICS TECH
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Patent Information

Application Number
CN202423052244.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-11
Publication Date
2025-10-28
Estimated Expiration
2034-12-11

AI Technical Summary

Technical Problem

During the production and testing of supercapacitors, some aged products may have defects such as incomplete charging and internal flaws, which may cause abnormal temperature rise and easily lead to explosion risks. Existing technologies lack effective temperature monitoring methods.

Method used

A thermocouple detector is added to the conventional test bench to monitor the temperature by keeping it close to the surface of the supercapacitor. The data is fed back to the terminal control host in real time. Combined with the design of the thermal conductive element and the fixing parts, it ensures that the detection terminal is stably fitted to achieve accurate temperature monitoring.

Benefits of technology

It realizes real-time monitoring of supercapacitor temperature, timely warns of abnormal conditions, reduces explosion risks, and improves test safety and reliability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an auxiliary monitoring device for detecting a super capacitor, which comprises a test board, wherein the test board is provided with a placing groove for placing the super capacitor; the fixing pieces are distributed at the positions, close to the placement groove, of the test board and are used for fixing the super capacitor; the thermocouple detector is arranged at the bottom of the test board; the thermocouple detector is provided with a thermocouple body and a detection terminal connected with the thermocouple body. According to the auxiliary monitoring device for super capacitor detection provided by the utility model, the thermocouple detector is additionally arranged on the basis of a conventional testboard, and the thermocouple detector is tightly attached to the surface of the super capacitor, so that the temperature state of the super capacitor can be monitored when the testboard performs charging, discharging and other tests on the super capacitor; and the signals are timely fed back to the host of the terminal control machine through a wire.
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Description

Technical Field

[0001] This utility model relates to the field of supercapacitor technology, and in particular to an auxiliary monitoring device for supercapacitor detection. Background Technology

[0002] Supercapacitors are novel energy storage devices that store energy through a double layer formed between electrodes and the electrolyte. When the electrodes come into contact with the electrolyte, the interaction of Coulomb forces, intermolecular forces, and interatomic forces creates a stable double layer of charges with opposite signs at the solid-liquid interface, known as the interfacial double layer. A double-layer supercapacitor can be viewed as two inactive porous plates suspended in the electrolyte, with a voltage applied to both plates. The potential applied to the positive plate attracts negative ions from the electrolyte, while the negative plate attracts positive ions, thus forming a double-layer capacitor on the surfaces of the two electrodes. Based on the electrode materials, double-layer supercapacitors can be classified into carbon electrode double-layer supercapacitors, metal oxide electrode supercapacitors, and organic polymer electrode supercapacitors.

[0003] All-tab supercapacitors are one type of capacitor. In actual production, supercapacitors require testing. The typical testing procedure for all-tab supercapacitors is: aging of the bare product → constant current charge-discharge test → electrical characteristic screening. During constant current charge-discharge, the focus is on the charge-discharge current and voltage. Because performance testing is conducted after aging, some aged products may exhibit incomplete charging, failure to charge, or internal defects. Products with these defects will experience a rapid temperature rise during high-current instantaneous testing, potentially leading to explosions and injuries. Therefore, an auxiliary monitoring device for supercapacitor testing is proposed. Utility Model Content

[0004] Therefore, it is necessary to provide an auxiliary monitoring device for supercapacitor testing to address the aforementioned technical problems. This device adds a thermocouple detector to a conventional testing bench to monitor the temperature of the supercapacitor under multiple testing conditions. In the event of a rapid temperature rise, the device can promptly provide feedback to the terminal control host, allowing personnel in the terminal control room to react in a timely manner and prevent further escalation of the problem.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An auxiliary monitoring device for supercapacitor detection includes:

[0007] A test stand, having an insertion slot for inserting a supercapacitor;

[0008] Fixing components are distributed on the test platform near the insertion slot to fix the supercapacitor.

[0009] A thermocouple detector is located at the bottom of the test stage;

[0010] The thermocouple detector has a thermocouple body and a detection terminal connected thereto;

[0011] The detection terminal penetrates the test bench and contacts the supercapacitor to form a temperature monitoring system.

[0012] Furthermore, the insertion groove is also provided with an embedding groove, in which a temperature-conducting element is embedded.

[0013] Furthermore, the temperature-conducting element includes a temperature-conducting skeleton and a heat insulation cover surrounding the temperature-conducting skeleton.

[0014] Furthermore, a weight-reducing groove is formed on the surface of the temperature-conducting frame, and a heat-collecting block is fixed in the middle of the temperature-conducting frame.

[0015] Furthermore, a detection groove is formed on the surface of the heat collection block, and a through groove is also formed at the position of the test platform corresponding to the detection groove. The detection groove and the through groove allow the detection terminal to pass through the test platform and fit with the supercapacitor.

[0016] Furthermore, U-shaped frames are fixed on both sides of the bottom of the test bench;

[0017] The inner side of the U-shaped frame is provided with a sliding groove, and two U-shaped frames are slidably assembled together through the sliding groove with a sliding seat, and the thermocouple body is fixedly installed on the sliding seat.

[0018] Furthermore, guide posts that are fixed to the slide groove are movably inserted on both sides of the surface of the sliding seat, and the sliding seat can slide along the height direction under the action of the guide posts.

[0019] Furthermore, a spring is also fitted onto the surface of the guide post;

[0020] One end of the spring is connected to the surface of the sliding seat, and the other end is fixed to the bottom wall of the groove. Under the action of the spring, the detection terminal can protrude from the outside of the detection groove in its natural state.

[0021] Furthermore, the thermocouple detector also includes wires, and the wires on the plurality of thermocouple detectors are electrically connected to an external terminal control host.

[0022] Furthermore, a buzzer alarm is electrically connected to the terminal control host.

[0023] Furthermore, the fastener includes a left fastener and a right fastener;

[0024] The left fixing component includes a left fixing seat fixed to one side of the test bench, and a test terminal is inserted into the left fixing seat;

[0025] The right fixing component includes a right fixing seat that is slidably disposed on the other side above the test platform. A movable rod is slidably inserted into the surface of the right fixing seat. One end of the movable rod is fixed with an abutment end. A compression spring that is fixed to the abutment end is also sleeved on the surface of the movable rod. One end of the compression spring is fixed to the right fixing seat.

[0026] The right fixed seat is also provided with a screw rod through its surface. One end of the screw rod is slidably assembled with a guide groove on the test bench, and a nut is threaded onto the top of the screw rod.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The auxiliary monitoring device for supercapacitor testing provided by this utility model adds a thermocouple detector to the conventional test bench, so that the thermocouple detector is in close contact with the surface of the supercapacitor. In this way, during the charging and discharging tests of the supercapacitor on the test bench, its temperature status can be monitored and fed back to the terminal control host in a timely manner through wires. This allows the operators in the terminal control room to judge whether there is an abnormal temperature of the supercapacitor itself under the test status by observing the data of the terminal control host, so as to react in time and reduce the occurrence of explosion and injury caused by abnormal temperature.

[0029] By using the U-shaped frame and spring, the detection terminals on the thermocouple detector can protrude from the outside of the detection slot in a natural state. After the supercapacitor is placed on the temperature-conducting element and fixed by the fastener, the monitoring terminal under pressure will move down, causing the spring to compress. The compressed spring will give the detection terminal an upward resistance force, thereby making the terminal to be detected fit tightly against the surface of the supercapacitor, achieving more stable temperature monitoring.

[0030] By designing the temperature-conducting element, the super detector can be placed in close contact with the temperature-conducting frame when the supercapacitor is placed on the test bench for testing. In this way, the temperature of the supercapacitor surface in other areas can be transferred through the temperature-conducting frame and transferred to the detection terminal in conjunction with the heat collection block. This makes the data from the detection terminal for stable testing of the supercapacitor more accurate and improves the practicality of the device. Attached Figure Description

[0031] Figure 1 A schematic diagram of the auxiliary monitoring device for supercapacitor testing provided by this utility model;

[0032] Figure 2A schematic diagram of the second state structure of the auxiliary monitoring device for supercapacitor detection provided by this utility model;

[0033] Figure 3 A schematic diagram of the test bench structure for the auxiliary monitoring device for supercapacitor testing provided by this utility model;

[0034] Figure 4 A schematic diagram of the insertion slot structure of the auxiliary monitoring device for supercapacitor testing provided by this utility model;

[0035] Figure 5 A schematic diagram of the fixture structure of the auxiliary monitoring device for supercapacitor testing provided by this utility model;

[0036] Figure 6 A schematic diagram of the temperature-conducting element structure of the auxiliary monitoring device for supercapacitor testing provided by this utility model;

[0037] Figure 7 A side view of the auxiliary monitoring device for supercapacitor testing provided by this utility model in the unmonitored state;

[0038] Figure 8 A schematic diagram of the auxiliary monitoring device for supercapacitor testing provided by this utility model under monitoring conditions;

[0039] Figure 9 A schematic diagram of the circuit connection structure of the auxiliary monitoring device for supercapacitor detection provided by this utility model.

[0040] The markings in the diagram are explained as follows:

[0041] Test stage 1, insertion slot 11, supercapacitor 12, embedding slot 13, through slot 14;

[0042] Fixing component 2, left fixing seat 21, test terminal 22, right fixing seat 23, movable rod 24, contact end 25, compression spring 26, screw 27, guide groove 28, nut 29;

[0043] Thermocouple detector 3, thermocouple body 31, detection terminal 32, wire 33;

[0044] Temperature-conducting element 4, temperature-conducting frame 41, heat insulation cover 42, weight reduction groove 43, heat collection block 44, detection groove 45;

[0045] 5. U-shaped frame; 51. Slide groove; 52. Sliding seat; 53. Guide column; 54. Spring;

[0046] Terminal control host 6, buzzer alarm 61. Detailed Implementation

[0047] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0048] As described in the background art, during actual product testing, some aged products may exhibit incomplete charging, failure to charge, or internal defects. Products with such defects will experience a rapid increase in temperature and internal pressure during high-current instantaneous testing, which can easily lead to explosions and injuries.

[0049] To solve this technical problem, this utility model provides an auxiliary monitoring device for supercapacitor detection, which is applied to supercapacitors.

[0050] For details, please refer to Figures 1-9 As shown, the auxiliary monitoring device for supercapacitor detection specifically includes:

[0051] Test stand 1, having an insertion slot 11 for inserting supercapacitor 12;

[0052] Fixing member 2 is located on the test platform 1 near the insertion slot 11 and is used to fix the supercapacitor 12.

[0053] Thermocouple detector 3 is located at the bottom of the test stage 1;

[0054] The thermocouple detector 3 has a thermocouple body 31 and a detection terminal 32 connected thereto;

[0055] The detection terminal 32 penetrates the test bench 1 and contacts the supercapacitor 12 to form a temperature monitoring system;

[0056] The thermocouple detector 3 also includes a wire 33, and the wires 33 on the plurality of thermocouple detectors 3 are electrically connected to the external terminal control host 6.

[0057] The auxiliary monitoring device for supercapacitor testing provided by this utility model adds a thermocouple detector 3 to the conventional test bench 1, so that the thermocouple detector 3 is in close contact with the surface of the supercapacitor 12. In this way, during the charging and discharging tests of the supercapacitor 12 on the test bench 1, its temperature status can be monitored, and the data can be fed back to the terminal control host 6 in a timely manner through the wire 33. This allows the operators in the terminal control room to judge whether there is an abnormal temperature of the supercapacitor 12 under the test status by observing the data of the terminal control host 6, so as to react in time and reduce the occurrence of explosions and injuries caused by abnormal temperatures.

[0058] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0059] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0060] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0061] Example 1

[0062] Please refer to Figures 1-9 An auxiliary monitoring device for supercapacitor testing includes: a test platform 1 having an insertion slot 11 for inserting a supercapacitor 12; a fixing member 2 distributed on the test platform 1 near the insertion slot 11 for fixing the supercapacitor 12; and a thermocouple detector 3 located at the bottom of the test platform 1.

[0063] The thermocouple detector 3 has a thermocouple body 31 and a detection terminal 32 connected thereto, wherein the detection terminal 32 passes through the test bench 1 and contacts the supercapacitor 12 to form temperature monitoring;

[0064] The thermocouple detector 3 also includes a wire 33, and the wires 33 on the plurality of thermocouple detectors 3 are electrically connected to the external terminal control host 6.

[0065] In this embodiment, a thermocouple detector 3 is designed on the test bench 1, which is used to test the supercapacitor 12 in a conventional manner. When the supercapacitor 12 is placed on the test bench 1 and fixed by the fastener 2, the bottom of the supercapacitor 12 will be in contact with the detection terminal 32 of the thermocouple detector 3. In this way, the temperature of the supercapacitor 12 when it is being tested can be detected through the detection terminal 32, and the detected temperature is fed back to the terminal control host 6 through the wire 33. The staff in the terminal control room can monitor the status of the supercapacitor 12 by observing the temperature data displayed on the terminal control host 6. If the temperature exceeds the normal detection temperature of the supercapacitor 12, the staff will react quickly to avoid further serious consequences.

[0066] Example 2

[0067] The auxiliary monitoring device for supercapacitor detection provided in Example 1 has been further optimized, specifically, as follows: Figure 9 As shown, this embodiment adds a buzzer alarm 61 based on the above embodiment 1, as detailed below:

[0068] The terminal control host 6 is also electrically connected to a buzzer alarm 61, such as Figure 9 The diagram shows the connection status between the terminal control host 6, the buzzer alarm 61, and the thermocouple detector 3. In practical applications, a temperature threshold can be designed on the terminal control host 6, for example, it can be set to 100 degrees. When the thermocouple detector 3 is attached to the surface of the supercapacitor 12 to detect the temperature, the detected temperature will be continuously updated on the display screen of the terminal control host 6 through the wire 33. When the temperature exceeds 100 degrees, the threshold preset by the terminal control host 6 is triggered, which will trigger the alarm function of the buzzer alarm 61, and further help to remind the staff around the terminal control host 6 to take emergency measures to prevent the temperature from rising further.

[0069] The aforementioned buzzer alarm 61 can be installed in the terminal control room, so that when data is observed through the display screen of the terminal control host 6 in the terminal control room, the alarm of the buzzer alarm 61 can be received in a timely manner.

[0070] Example 3

[0071] The auxiliary monitoring device for supercapacitor detection provided in Example 1 or 2 can be further optimized, such as... Figure 4 , Figure 5 and Figure 6 As shown, the insertion groove 11 is also provided with an embedding groove 13, and a temperature conducting element 4 is embedded in the embedding groove 13.

[0072] The temperature-conducting element 4 includes a temperature-conducting frame 41 and a heat insulation cover 42 surrounding the temperature-conducting frame 41. After the temperature-conducting element 4 is assembled inside the embedding groove 13, the heat insulation cover 42 can separate the temperature-conducting frame 41 from the test stage 1 so that the temperature on the supercapacitor 12 can be uniformly transferred through the temperature-conducting frame 41.

[0073] The surface of the temperature-conducting frame 41 is provided with a weight-reducing groove 43, and a heat collection block 44 is fixed in the middle of the temperature-conducting frame 41.

[0074] The surface of the heat collection block 44 is provided with a detection groove 45, and the test platform 1 is also provided with a through groove 14 at the position corresponding to the detection groove 45. The detection terminal 32 can pass through the test platform 1 and be attached to the supercapacitor 12 due to the action of the detection groove 45 and the through groove 14.

[0075] In this embodiment, both the heat-conducting frame 41 and the heat-collecting block 44 are made of heat-conducting metals, such as silver or copper.

[0076] like Figure 8 As shown, after actual assembly, the detection terminal 32 on the thermocouple detector 3 is located inside the detection groove 45 and is in contact with the inner wall of the detection groove 45. In this way, after the supercapacitor 12 is placed on the surface of the temperature-conducting element 4 and fixed by the fixing member 2, the temperature-conducting element 4 can uniformly transfer the temperature of the surface of the supercapacitor 12. With the design of the heat collection block 44, the detection terminal 32 can receive a more accurate temperature, thereby achieving more accurate monitoring of the temperature of the supercapacitor 12 during the detection process.

[0077] Example 4

[0078] The auxiliary monitoring device for supercapacitor detection provided in Example 3 has been further optimized, such as... Figure 6 and Figure 7 As shown, U-shaped frames 5 are fixed on both sides of the bottom of the test bench 1;

[0079] The inner side of the U-shaped frame 5 is provided with a sliding groove 51, and two U-shaped frames 5 are slidably assembled with a sliding seat 52 through the sliding groove 51. The thermocouple body 31 is fixedly installed on the sliding seat 52.

[0080] The sliding seat 52 is also movably inserted on both sides of its surface, and guide posts 53 fixed to the sliding groove 51 are provided. The sliding seat 52 can slide along the height direction under the action of the guide posts 53.

[0081] A spring 54 is also fitted on the surface of the guide post 53. One end of the spring 54 is connected to the surface of the sliding seat 52, and the other end is fixed to the bottom wall of the slide groove 51. The detection terminal 32 can protrude from the outside of the detection groove 45 in a natural state due to the force of the spring 54.

[0082] like Figure 3 As shown, the supercapacitor 12 is not placed on the temperature-conducting frame 41 at this time, so the detection terminal 32 will protrude from the outside of the detection groove 45. At this time, the spring 54 is in the extended state. Then, the supercapacitor 12 is placed on the surface of the temperature-conducting frame 41 and fixed by the fastener 2. At this time, the detection terminal 32 under pressure will drive the thermocouple body 31 and the sliding seat 52 to move down. The downward sliding seat 52 will cause the spring 54 to be compressed. The compressed spring 54 will give the sliding seat 52 an upward supporting force, which will make the detection terminal 32 more closely adhere to the surface of the supercapacitor 12 for temperature detection.

[0083] Example 5

[0084] The auxiliary monitoring device for supercapacitor detection provided in Example 4 has been further optimized, such as... Figure 3 , Figure 4 and Figure 5 As shown, the fixing member 2 includes a left fixing member and a right fixing member;

[0085] The left fixing component includes a left fixing seat 21 fixed on one side above the test bench 1, and a test terminal 22 is inserted into the left fixing seat 21.

[0086] The right fixing component includes a right fixing seat 23 that is slidably disposed on the other side above the test bench 1. A movable rod 24 is slidably inserted into the surface of the right fixing seat 23. One end of the movable rod 24 is fixed with an abutment end 25. A compression spring 26 that is fixed to the abutment end 25 is also sleeved on the surface of the movable rod 24. One end of the compression spring 26 is fixed to the right fixing seat 23.

[0087] Among them, the surface of the right fixed seat 23 is also provided with a screw 27, one end of the screw 27 is slidably assembled with the guide groove 28 on the test bench 1, and the top end of the screw 27 is threaded with a nut 29.

[0088] First, place the supercapacitor 12 on the surface of the temperature-conducting frame 41 on the test bench 1, and connect one end of the supercapacitor 12 to the test terminal 22. Then, move the right fixing seat 23 on the surface of the test bench 1 so that the contact end 25 on it is pressed against the surface of the supercapacitor 12. Then, rotate the nut 29 to lock it on the test bench 1 through the screw 27, thus completing the fixing of the supercapacitor 12, and the test can be carried out.

[0089] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0090] Obviously, the embodiments described above are only some of the embodiments of the present invention, rather than all of the embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of protection of the present invention patent.

Claims

1. An auxiliary monitoring device for supercapacitor detection, characterized in that, It includes: Test stand (1), having an insertion slot (11) for inserting a supercapacitor (12); Fixing member (2), which is located on the test platform (1) near the insertion slot (11), is used to fix the supercapacitor (12); Thermocouple detector (3) is located at the bottom of the test stand (1); The thermocouple detector (3) has a thermocouple body (31) and a detection terminal (32) connected thereto. The detection terminal (32) passes through the test bench (1) and contacts the supercapacitor (12) to form a temperature monitoring system; The thermocouple detector (3) also includes wires (33), and the wires (33) on the multiple thermocouple detectors (3) are electrically connected to the external terminal control host (6).

2. The auxiliary monitoring device for supercapacitor detection according to claim 1, characterized in that, An embedding groove (13) is also provided in the insertion groove (11), and a temperature-conducting element (4) is embedded in the embedding groove (13).

3. The auxiliary monitoring device for supercapacitor detection according to claim 2, characterized in that, The temperature-conducting element (4) includes a temperature-conducting skeleton (41) and a heat insulation cover (42) arranged around the periphery of the temperature-conducting skeleton (41).

4. The auxiliary monitoring device for supercapacitor detection according to claim 3, characterized in that, The surface of the heat-conducting frame (41) is provided with a weight-reducing groove (43), and a heat-collecting block (44) is fixed in the middle of the heat-conducting frame (41).

5. The auxiliary monitoring device for supercapacitor detection according to claim 4, characterized in that, The surface of the heat collection block (44) is provided with a detection groove (45), and the test platform (1) is also provided with a through groove (14) at the position corresponding to the detection groove (45). The detection terminal (32) can pass through the test platform (1) and fit with the supercapacitor (12) due to the action of the detection groove (45) and the through groove (14).

6. The auxiliary monitoring device for supercapacitor detection according to claim 5, characterized in that, The test bench (1) has U-shaped frames (5) fixed on both sides of its bottom. The inner side of the U-shaped frame (5) is provided with a sliding groove (51), and the two U-shaped frames (5) are slidably assembled together with a sliding seat (52) through the sliding groove (51). The thermocouple body (31) is fixedly installed on the sliding seat (52).

7. The auxiliary monitoring device for supercapacitor detection according to claim 6, characterized in that, The sliding seat (52) is also movably inserted on both sides of its surface with guide posts (53) fixed to the slide groove (51). The sliding seat (52) can slide along the height direction under the action of the guide posts (53).

8. The auxiliary monitoring device for supercapacitor detection according to claim 7, characterized in that, The surface of the guide post (53) is also fitted with a spring (54); One end of the spring (54) is connected to the surface of the sliding seat (52), and the other end is fixed to the bottom wall of the groove (51). Under the force of the spring (54), the detection terminal (32) can protrude from the outside of the detection groove (45) in its natural state.

9. The auxiliary monitoring device for supercapacitor detection according to claim 1, characterized in that, A buzzer alarm (61) is also electrically connected to the terminal control host (6).

10. The auxiliary monitoring device for supercapacitor detection according to claim 1, characterized in that, The fastener (2) includes a left fastener and a right fastener; The left fixing component includes a left fixing seat (21) fixed on one side above the test bench (1), and a test terminal (22) is inserted into the left fixing seat (21). The right fixing component includes a right fixing seat (23) that is slidably disposed on the other side above the test platform (1). A movable rod (24) is slidably inserted on the surface of the right fixing seat (23). One end of the movable rod (24) is fixed with an abutment end (25). A compression spring (26) that is fixed to the abutment end (25) is also sleeved on the surface of the movable rod (24). One end of the compression spring (26) is fixed to the right fixing seat (23). Among them, the surface of the right fixed seat (23) is also provided with a screw (27), one end of the screw (27) is slidably assembled with the guide groove (28) on the test bench (1), and the top end of the screw (27) is threaded with a nut (29).