Device for testing high-power density performance of electric double-layer capacitor energy storage component

Abstract

The invention relates to a high-power density performance testing device for a double-electric-layer capacitor energy storage component, a load unit of the device comprises a heat conduction cylinder, two ends of the heat conduction cylinder are respectively provided with a gas transmission hole, the outer side surface of the heat conduction cylinder is spirally wound with a heating resistance wire in insulation contact with the heat conduction cylinder along the axial direction, and one end of the heating resistance wire is connected to the negative electrode of a capacitor seat through a wire; the other end is a free end fixedly arranged on the surface of the heat conduction cylinder; the positive electrode of the capacitor seat is connected with a sliding conductor through a stretchable telescopic wire, and the sliding conductor is connected with a driving element so as to slide on the surface of the heating resistance wire in the axial direction of the heat conduction cylinder. The capacitor seat is also provided with a temperature sensor for detecting the temperature near the electric double-layer capacitor; the heat exchange unit is connected with the heat conduction cylinder; and the heat exchange unit absorbs part of heat transferred to the heat conduction cylinder by the heating resistance wire and then heats the electric double-layer capacitor. According to the invention, the load can be flexibly changed for high-power density testing, and power density performance testing at different temperatures can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage device power density detection equipment, in particular to a high power density performance testing device for electric double layer capacitor energy storage components. BACKGROUND

[0002] The high power density characteristic detection method of the electric double layer capacitor mainly includes constant current charge and discharge test, rapid charge and discharge test, high frequency alternating current impedance method, cycle life test and environmental adaptability test. Specifically, the constant current charge and discharge test is the most direct method to measure the energy density. A constant current source is used to fully charge and discharge the capacitor, the voltage fluctuation during the whole process is recorded, the effective charge quantity is calculated, and the energy density is converted into energy density combined with the volume or mass of the capacitor device; this method usually uses an electrochemical workstation or a battery test system, which has high precision voltage monitoring function and can identify millivolt level voltage fluctuation, and cooperates with precise current control module to automatically complete energy density calculation. The rapid charge and discharge test is to capture the instantaneous large current, and the key indicators are the internal resistance and self-discharge capacity of the capacitor. The microsecond level reaction is measured by using an electrochemical workstation, and a high frequency pulse is applied by using a rapid charge and discharge tester. The electrochemical workstation judges the characteristics of the active material through impedance spectrum, and the rapid charge and discharge tester verifies the instantaneous carrying capacity of the capacitor by changing the rate of 0.5V / s or more. The high frequency alternating current impedance method is used to measure the equivalent series resistance (ESR) of the capacitor. By applying a high frequency alternating current signal, the phase difference between voltage and current is measured, the ESR is calculated, and the peak power is calculated by substituting the formula.

[0003] The cycle life test uses a cycle charge and discharge tester to perform multiple charge and discharge cycles on the capacitor, aiming to simulate the high power density characteristics under real load conditions, and to evaluate the life and performance degradation of the capacitor. This method is not only used for high power density detection, but also for evaluating the overall performance and life of the capacitor. Another important aspect of the high functional density performance test of the energy storage component is the environmental adaptability test, one of the core performances of which is the influence of temperature on the high power density performance of the capacitor. For example, the temperature cycle test is carried out in the range of-40℃ to 85℃ to verify the shell sealing performance and the stability of the electrolyte; the high temperature storage test detects the capacity recovery rate after 300 hours of continuous storage at 85℃.

[0004] In the above existing double electric layer capacitor high power density test method, based on the simulation of the real work of the capacitor, there is no device in the existing detection equipment that can flexibly change the load. For the simulated discharge process, only constant power output can be performed under constant load to obtain the stability of the rated output power density. It is difficult to simulate the high power density characteristics under various loads. In addition, the temperature test is performed separately, and additional power consumption is required to ensure the heating process. Two different devices are required for testing, and the detection is not convenient. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a double electric layer capacitor energy storage component high power density performance test device to solve the problems in the prior art that the load size cannot be flexibly adjusted and temperature testing cannot be performed when simulating the discharge of the capacitor. In the simulation discharge process, the heat generated by the output power consumption is used for the test in the self-heating process, and the energy is fully recycled.

[0006] The present application is implemented by the following technical solutions: A double electric layer capacitor energy storage component high power density performance test device includes a capacitor seat for mounting a double electric layer capacitor and a load unit powered by the double electric layer capacitor. The load unit includes a heat-conducting cylinder with a gas inlet at each end. The outer surface of the heat-conducting cylinder is spirally wrapped with a heating resistance wire in insulating contact. One end of the heating resistance wire is connected to the negative electrode of the capacitor seat through a lead wire, and the other end is a free end fixed on the surface of the heat-conducting cylinder. The positive electrode of the capacitor seat is connected to a sliding conductor through a stretchable extension lead wire. The sliding conductor is connected to a driving element to slide along the axial direction of the heat-conducting cylinder on the surface of the heating resistance wire to change the resistance value of the connected circuit. The capacitor seat is also provided with a temperature sensor for detecting the temperature near the double electric layer capacitor. The device also includes a heat exchange unit connected to the heat-conducting cylinder. The heat exchange unit absorbs part of the heat transferred from the heating resistance wire to the heat-conducting cylinder and heats the double electric layer capacitor on the capacitor seat.

[0007] Further, the sliding conductor includes a mounting handle, a compression spring, a sliding column, and a contact plate. The end of the sliding seat is provided with a shaft sleeve. One end of the extension lead wire is inserted through the shaft sleeve and connected to the other end of the sliding column. The other end of the sliding column is fixed with the contact plate. The contact plate is in sliding contact with the outer side of the spiral structure formed by the heating resistance wire.

[0008] Further, the two side surfaces of the contact plate are provided with rounded surfaces.

[0009] Further, the contact plate contacts the next circle of heating resistance wire only when it slides away from the previous circle of heating resistance wire.

[0010] Further, the driving element comprises an inner insertion rod and a socket tube, the inner insertion rod is fixed perpendicularly to one side of the mounting handle, the inner insertion rod can move axially in the socket tube and is relatively stably installed in the socket tube after moving into position.

[0011] Further, the inner insertion rod is a screw rod, the screw rod has a through hole axially, the screw rod is installed in the socket tube in threaded cooperation, a guide rod is installed in the through hole in axial sliding cooperation, a transmission key is fixed on the rod wall of the guide rod, the transmission key is installed in a guide groove on the hole wall of the through hole in sliding cooperation, the guide groove is arranged parallel to the guide rod; one end of the guide rod is rotatably installed in the end of the socket tube and is in transmission connection with the main shaft of the micro motor installed in the end of the socket tube, when the main shaft of the micro motor rotates, the inner insertion rod is screwed into or out of the socket tube in threaded cooperation.

[0012] Further, a calculation unit is further included, the calculation unit obtains the displacement of the sliding conductor based on the rotation speed of the main shaft and the threaded pair transmission between the inner insertion rod and the socket tube to determine the resistance value of the heating resistance wire connected to the circuit: assuming that the rotation speed of the main shaft is n r / min, the displacement of the inner insertion rod axially moving is s mm per rotation of the main shaft, the displacement K of the sliding conductor is nts mm, t is the rotation time of the micro motor, the resistance value change amount of the heating resistance wire is nts*m, wherein m is the length of the heating resistance wire corresponding to the power load U per Q mm distance in the axial direction of the spiral type. 2 / (R0±ρntpL / QS), R0 is the original resistance value before adjusting the resistance value of the heating resistance wire connected to the circuit.

[0013] Further, the cavity wall of the installation cavity of the capacitor seat for installing the electric double layer capacitor has a sandwich space, one air hole of the heat conducting cylinder is connected to one air supply pipeline to input the air heated by the heat conducting cylinder into the sandwich space, and an exhaust valve is installed on one side of the sandwich space.

[0014] Further, the capacitor seat is provided with a control valve on one side to enable the sandwich space to be in communication with the cold air source and the air supply pipeline, and the sandwich space is in communication with the installation cavity through a plurality of air permeable holes.

[0015] Further, the air inlet joint is installed on the capacitor seat, the air inlet joint has a first hole section, a second hole section and a third hole section with gradually increased hole diameters, the third hole section is arranged close to the capacitor seat, the outlet end of the air supply pipeline is connected with one end of the control valve, the other end of the control valve is connected with a plug-in pipe section inserted into the interlayer space, the plug-in pipe section is axially installed on the air inlet joint, and the part of the plug-in pipe section located in the air inlet joint is provided with two rings of air holes spaced from each other, the plug-in pipe section at the position between the two rings of air holes is provided with a partition part for blocking the plug-in pipe section, and the first ring of air holes close to the capacitor seat of the plug-in pipe section is provided with a positioning collar; further comprising a sealing ring axially and tightly sleeved on the outside of the plug-in pipe section, the sealing ring is connected and installed in the second hole section through a return spring, and the return spring is installed in the first hole section, and the second ring of air holes of the plug-in pipe section is located in the first hole section, when the airflow pushes the sealing ring to move to the positioning collar through the second ring of air holes, the airflow can enter the interlayer space through the first ring of air holes.

[0016] The beneficial effects of the present application are: The double electric layer capacitor energy storage component high power density performance testing device uses the spiral heating resistance wire as a load to perform different power outputs, and uses the heat generated by the heating resistance wire to be delivered into the capacitor seat, so as to improve the working temperature of the double electric layer capacitor, to achieve the purpose of testing the power density of the double electric layer capacitor at different temperatures, and to directly use part of the energy in the capacitor discharge process for heating in the temperature test, so that the energy recycling is realized.

[0017] Other advantages, objects, and features of the present application will be apparent to those skilled in the art from the following specification, which is to be taken in conjunction with the accompanying drawings, wherein: BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of one embodiment of the present application; Figure 2 It is a structural schematic view of the sliding conductor and the driving element in the present application; Figure 3 It is a partial sectional view of the capacitor seat in the present application; Figure 4 It is a structural enlarged view of A in the present application. Figure 3

[0019] ​In the figure: capacitor seat 1, interlayer space 101, air hole 102, mounting cavity 103, heating resistance wire 2, flexible wire 3, sliding conductor 4, mounting handle 401, shaft sleeve 402, compression spring 403, sliding column 404, contact plate 405, driving element 5, inner plug 501, socket 502, transmission key 503, guide rod 504, micro motor 505, heat-conducting cylinder 6, air supply pipeline 7, temperature sensor 8, double-layer capacitor 9, control valve 10, plug-in pipe section 11, air inlet joint 12, first circle of air holes 13, positioning collar 14, sealing ring 15, reset spring 16, second circle of air holes 17, partition 18. DETAILED DESCRIPTION

[0020] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0021] Please refer to Figure 1As one of the embodiments of the present application, a high power density performance testing device for electric double layer capacitor energy storage components is introduced in detail. In terms of structure, it mainly includes a capacitor seat 1 for installing the electric double layer capacitor 9 and a load unit powered by the electric double layer capacitor 9 as the object of the output power of the electric double layer capacitor. The load unit is directly powered by the electric double layer capacitor 9, and the input power, the real-time power size change trend, can reflect the power output trend of the electric double layer capacitor 9. In this embodiment, the load unit includes a heat-conducting cylinder 6 with a gas inlet hole at each end. Specifically, there is a connecting pipe at each end of the heat-conducting cylinder 6, and the pipe opening is the gas inlet hole. A heating resistance wire 2 in insulating contact with the heat-conducting cylinder 6 is spirally wound on the outer surface of the heat-conducting cylinder 6 along the axial direction. One end of the heating resistance wire 2 is connected to the negative electrode of the capacitor seat 1 through a wire, and the other end is a free end fixed on the surface of the heat-conducting cylinder 6, that is, it can be exposed outside the side surface of the heat-conducting cylinder 6. Specifically, the positive electrode of the capacitor seat 1 is connected to a sliding conductor 4 through a stretchable extension wire 3. The sliding conductor 4 is connected to a driving element 5. The driving element 5 drives the sliding conductor 4 to move, that is, to slide along the axial direction of the heat-conducting cylinder 6 on the surface of the heating resistance wire 2 and maintain conductive contact, so as to change the resistance value of the heating resistance wire 2 connected to the circuit. In specific production, the surface of the heating resistance wire 2 in direct contact with the heat-conducting cylinder 6 can be brushed with insulating material, and the remaining part is in exposed state of contactable conduction. In addition, in this embodiment, a temperature sensor 8 for detecting the temperature near the electric double layer capacitor 9 is specially arranged on the capacitor seat 1, so as to view the temperature change trend of the capacitor in the output power process in real time. In addition, the heat-conducting cylinder 6 is connected to a heat exchange unit. After absorbing part of the heat transferred from the heating resistance wire 2 to the heat-conducting cylinder 6, the heat exchange unit is used to heat the electric double layer capacitor 9 on the capacitor seat 1, so as to simulate the power output trend of the capacitor under the corresponding temperature or in the corresponding temperature range. In practice, a current meter can be connected in series in the circuit where the heating resistance wire 2 is located. When the resistance value of the heating resistance wire 2 is adjusted to the set value, the temperature of the environment where the capacitor is located is changed, the corresponding current value is recorded, and the power of the load unit composed of the heating resistance wire 2 is calculated according to the formula P=I2R, so as to obtain the power output trend of the electric double layer capacitor 9 and reflect the power density characteristics.

[0022] Specifically, in this embodiment, as Figure 2As shown, the sliding conductor 4 includes a mounting handle 401, a compression spring 403, a sliding column 404, and a contact plate 405. A bushing 402 is mounted on the end of the sliding block, with rounded corners at the end of the bushing 402. One end of the telescopic wire 3 passes freely through the bushing 402 and connects to one end of the sliding column 404. The other end of the sliding column 404 is fixed with the contact plate 405. The contact plate 405 slides in contact with the outer surface of the spiral structure formed by the winding of the heating resistance wire 2. Thus, when the contact plate 405 moves, the compression spring 403 can maintain sufficient and reliable contact with the heating resistance wire 2. In addition, the two sides of the contact plate 405 are rounded to prevent the contact plate 405 from hitting and jamming with the heating resistance wire 2, and to better cooperate with the elastic force of the compression spring 403 to ensure stable contact between the contact plate 405 and the heating resistance wire 2. In practice, it is best to make contact with the next heating resistor 2 only when the contact plate 405 has slid away from the previous heating resistor 2. This way, the calculated change in the length of the heating resistor 2 connected to the circuit will be more accurate.

[0023] Continue reading Figure 2 In this embodiment, the driving element 5 includes an inner rod 501 and a socket tube 502. The inner rod 501 is vertically fixed to one side of the mounting handle 401 so as to move the mounting handle 401, that is, to move the sliding conductor 4. The inner rod 501 can move axially within the socket tube 502 and, after moving into place, is relatively stably installed within the socket tube 502 to maintain the stability of the position of the sliding conductor 4.

[0024] As one specific implementation structure, the inner insertion rod 501 in this embodiment is a lead screw with an axial through hole, i.e., the lead screw has a shaft hole. This lead screw is threadedly installed inside the socket tube 502. A guide rod 504 is axially slidably installed in the through hole. A transmission key 503 is fixed on the wall of this guide rod 504. The transmission key 503 is slidably installed in a guide groove on the wall of the through hole. This guide groove is parallel to the guide rod 504 so that when the guide rod 504 rotates in place, it drives the inner insertion rod 501 to rotate, thus moving axially. In practice, one end of the guide rod 504 is rotatably installed inside the end of the socket tube 502, and the rest is inserted into the aforementioned through hole or shaft hole. One end of the guide rod 504 is connected to the main shaft of the micro motor 505 installed at the end of the socket tube 502. When the main shaft of the micro motor 505 rotates, the inner insert rod 501 is screwed in or out of the socket tube 502 in a threaded fit, so as to change the position of the sliding conductor 4, change the length of the heating resistance wire 2 connected to the circuit, and change the resistance value of the load unit.

[0025] In specific implementation, this embodiment may further include a calculation unit. This calculation unit calculates the displacement of the sliding conductor 4 based on the spindle speed and the threaded transmission between the inner insertion rod 501 and the socket tube 502, thereby determining the resistance value of the heating resistance wire 2 connected to the circuit. Specifically, the spindle speed can be set to nr / min, and the axial displacement of the inner insertion rod 501 is p mm for each rotation of the spindle. Then, the displacement K of the sliding conductor 4 is K = ntp mm, where t is the rotation time of the micro motor 505. Based on the above settings, the actual length change of the heating resistance wire 2 connected to the circuit is ntpL / Q mm. On the axial direction of the spiral of the heating resistance wire 2, each Q mm distance corresponds to a length L mm of the heating resistance wire 2 (the specific calculation can be performed by actual measurement or adaptively calculated based on the spiral pitch and spiral radius), and its corresponding power load is U. 2 / (R0±ρntpL / QS), R0 is the original resistance value of the heating resistance wire 2 when it was first connected to the circuit in a certain adjustment, ρ is the resistivity of the heating resistance wire 2, and S is the cross-sectional area of ​​the heating resistance wire 2.

[0026] In this embodiment, as Figures 3-4 The capacitor base 1 has a cavity 103 for mounting the double-layer capacitor 9. The cavity wall has a double-layer space 101. A vent hole of the heat-conducting cylinder 6 is connected to the aforementioned heat exchange unit, specifically an air supply pipe connected to the heat exchange unit. The air passing through the heat-conducting cylinder 6 is heated and then input into the double-layer space 101 to heat the working environment of the double-layer capacitor 9. An exhaust valve can also be installed on one side of the double-layer space 101 to exhaust the air. To enable the heat exchange unit to have a cooling effect at the same time, a very simple method is to provide a control valve 10 on one side of the capacitor base 1. This control valve 10 allows the double-layer space 101 to be uniformly connected to the cold air source and the air supply pipe 7. The double-layer space 101 is connected to the mounting cavity 103 through several vent holes 102 to blow hot air or cold / room temperature air towards the double-layer capacitor 9. During cooling, one inlet of the control valve 10 can be directly connected to the atmosphere to reduce the operating temperature of the double-layer capacitor 9 by air cooling; or it can be connected to a dedicated cooling system for cooling.

[0027] like Figures 3-4In the embodiment, the air inlet joint 12 is mounted on the capacitor seat 1, the air inlet joint 12 has a first hole section, a second hole section and a third hole section with gradually increasing hole diameters, specifically, the third hole section is arranged close to the capacitor seat 1, the outlet end of the air supply pipeline is connected with one end of the control valve 10 to input the hot air flow, and the other end of the control valve 10 is connected with the plug-in pipe section 11 inserted into the interlayer space 101, the plug-in pipe section 11 is axially mounted on the air inlet joint 12, and the part of the plug-in pipe section 11 located in the air inlet joint 12 is provided with two rings of air holes, i.e., the first ring of air holes 13 and the second ring of air holes 17, the plug-in pipe section 11 between the two rings of air holes has a partition 18 blocking the plug-in pipe section 11, the partition 18 divides the plug-in pipe section 11 into two independent channels, and on the first ring of air holes 13 of the plug-in pipe section 11 close to the capacitor seat 1, a positioning collar 14 is arranged to limit the moving position of the sealing ring 15 mentioned below. The sealing ring 15 is axially and sealingly fitted on the outside of the plug-in pipe section 11, the sealing ring 15 is connected and mounted in the second hole section by the return spring 16, and the return spring 16 is mounted in the first hole section. In specific manufacturing, the second ring of air holes 17 of the plug-in pipe section 11 is located in the first hole section, when the air flow is delivered by the pump (not shown in the figure) on the air supply pipeline 7 or the pipeline of the cooling air flow, the corresponding air flow enters the air inlet joint 12 through the second ring of air holes 17 and pushes the sealing ring 15 to move to the positioning collar 14, at this time, the air flow can enter the interlayer space 101 through the first ring of air holes 13, thereby realizing the effect of cooling and heating and achieving the purpose of changing the working environment temperature of the double-layer capacitor 9.

[0028] In the above description of the present application, it should be noted that the terms "one side", "the other side" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit it, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A device for testing high power density performance of an electric double layer capacitor energy storage component, comprising a capacitor seat (1) for mounting an electric double layer capacitor (9), and a load unit powered by the electric double layer capacitor (9), characterized in that, The load unit comprises a heat-conducting cylinder (6) with gas inlet holes at both ends, the outer surface of the heat-conducting cylinder (6) is spirally wound with a heating resistance wire (2) in insulated contact, one end of the heating resistance wire (2) is connected to the negative pole of the capacitor holder (1) through a wire, and the other end is fixedly arranged on the free end of the surface of the heat-conducting cylinder (6); the positive pole of the capacitor holder (1) is connected with a sliding conductor (4) through a stretchable extension wire (3), the sliding conductor (4) is connected with a driving element (5) to slide on the surface of the heating resistance wire (2) along the axial direction of the heat-conducting cylinder (6) to change the resistance value of the access circuit. The capacitor holder (1) is further provided with a temperature sensor (8) for detecting the temperature near the electric double layer capacitor (9). The heat exchange unit connected with the heat-conducting cylinder (6) absorbs part of the heat transferred from the heating resistance wire (2) to the heat-conducting cylinder (6) and is used for heating the electric double layer capacitor (9) on the capacitor holder (1). 2.The device for testing high power density performance of electric double layer capacitor energy storage component according to claim 1, wherein, The sliding conductor (4) comprises a mounting handle (401), a compression spring (403), a sliding column (404) and a contact plate (405), the end of the sliding seat is provided with a shaft sleeve (402), one end of the extension wire (3) is arranged to pass through the shaft sleeve (402) and is connected with one end of the sliding column (404), the other end of the sliding column (404) is fixedly provided with the contact plate (405), and the contact plate (405) is in sliding contact with the outer side of the spiral structure of the heating resistance wire (2). 3.The device for testing high power density performance of electric double layer capacitor energy storage component according to claim 2, wherein, The two side surfaces of the contact plate (405) are provided with rounded surfaces. 4.The device for testing high power density performance of electric double layer capacitor energy storage component according to claim 3, wherein, The contact plate (405) contacts the next heating resistance wire (2) only when it slides away from the previous heating resistance wire (2). 5.The high power density performance testing device for electric double layer capacitor energy storage components of claim 2, wherein, The driving element (5) comprises an inner insertion rod (501) and a socket tube (502), the inner insertion rod (501) is fixedly arranged on one side of the mounting handle (401) in a vertical manner, the inner insertion rod (501) can move axially in the socket tube (502) and is relatively stably arranged in the socket tube (502) after being moved into position. 6.The high power density performance testing device for electric double layer capacitor energy storage components of claim 5, wherein, The inner insertion rod (501) is a screw rod, the screw rod is axially provided with a through hole, the screw rod is threadedly arranged in the socket tube (502) in a sliding fit manner, a guide rod (504) is axially arranged in the through hole in a sliding fit manner, a transmission key (503) is fixedly arranged on the rod wall of the guide rod (504), the transmission key (503) is slidingly arranged in a guide groove on the hole wall of the through hole, and the guide groove is arranged in parallel with the guide rod (504); one end of the guide rod (504) is rotatably arranged in the end portion of the socket tube (502) and is in transmission connection with the main shaft of a micro motor (505) arranged on the end portion of the socket tube (502), when the main shaft of the micro motor (505) rotates, the inner insertion rod (501) is screwed into or out of the socket tube (502) in a threadedly matched manner. 7.The high power density performance testing device for electric double layer capacitor energy storage components of claim 6, wherein, Also include a computing unit, the computing logic of the computing unit is: the main shaft rotation speed is n r / min, the main shaft rotates a circle, the displacement of the interpolation rod (501) axial movement is p millimeter, the displacement K of the sliding conductor (4) is ntp millimeter, wherein t is the rotation time of the micro motor (505), the actual length variation of the heating resistance wire (2) connected to the circuit is ntpL / Q millimeter, wherein in the axial direction of the spiral type winding of the heating resistance wire (2), the length of the heating resistance wire (2) corresponding to every Q millimeter distance is L millimeter, and the corresponding power load is U 2 / (R0±ρntpL / QS), R0 is the original resistance value of the heating resistance wire (2) originally connected to the circuit in the first adjustment, ρ is the resistivity of the heating resistance wire (2), and S is the cross-sectional area of the heating resistance wire (2). 8.The high power density performance testing device for electric double layer capacitor energy storage components of claim 1, wherein, The cavity wall of the installation cavity (103) of the capacitor holder (1) for installing the electric double layer capacitor (9) has a sandwich space (101), one air hole of the heat conducting cylinder (6) is connected with one air supply pipeline of the heat exchange unit to input the air heated by the heat conducting cylinder (6) into the sandwich space (101), and an exhaust valve is installed on one side of the sandwich space (101). 9.The high power density performance testing device for electric double layer capacitor energy storage components of claim 8, wherein, One side of the capacitor holder (1) is provided with a control valve (10) to make the sandwich space (101) in communication with a cold air source and an air supply pipeline (7), and the sandwich space (101) is in communication with the installation cavity (103) through a plurality of air holes (102). 10.The device for testing high power density performance of electric double layer capacitor energy storage component according to claim 9, wherein, An air inlet connector (12) is installed on the capacitor holder (1), the air inlet connector (12) has a first hole section, a second hole section and a third hole section with gradually increasing hole diameters, the third hole section is arranged close to the capacitor holder (1), one end of the control valve (10) is connected with the outlet end of the air supply pipeline, the other end of the control valve (10) is connected with a plug-in pipe section (11) inserted into the sandwich space (101), the plug-in pipe section (11) is axially installed on the air inlet connector (12), and the part of the plug-in pipe section (11) located in the air inlet connector (12) is provided with two rings of air holes spaced from each other, the plug-in pipe section (11) at the position between the two rings of air holes is provided with a partition part (18) for blocking the plug-in pipe section (11), and the plug-in pipe section (11) is provided with a positioning collar (14) at the position of the first ring of air holes (13) close to the capacitor holder (1). Further comprising a sealing ring (15) axially and dynamically sealingly fitted on the outside of the plug-in pipe section (11), the sealing ring (15) is connected and installed in the second hole section through a return spring (16), the return spring (16) is installed in the first hole section, the second ring of air holes (17) of the plug-in pipe section (11) is located in the first hole section, when the air flow pushes the sealing ring (15) to move to the positioning collar (14) through the second ring of air holes (17), the air flow can enter into the sandwich space (101) through the first ring of air holes (13).

Images