A supercapacitor energy storage circuit

Abstract

The application discloses a super capacitor energy storage circuit, comprising a thermoelectric power supply module, a DC-DC conversion module, a super capacitor group, a temperature acquisition module and a main control module, the thermoelectric power supply module comprises a low-temperature-difference power supply mode and a high-temperature-difference power supply mode, and is used for converting waste heat into electric energy, the DC-DC conversion module is used for converting the electric energy converted by the thermoelectric power supply module into stable direct-current voltage, the super capacitor group is used for storing the electric energy converted by the thermoelectric power supply module, the temperature acquisition module is used for collecting the hot-end temperature and the cold-end temperature of the thermoelectric power supply module in real time, and the main control module controls the thermoelectric power supply module to execute the high-temperature-difference power supply mode according to whether the difference between the hot-end temperature and the cold-end temperature exceeds a preset temperature difference threshold value. The application can control the power supply mode of the thermoelectric power supply module according to the temperature difference change between two ends of the thermoelectric power supply module, and ensures that the thermoelectric power supply module can adopt the most suitable power supply mode under any temperature difference state.

Description

[Technical Field] This utility model relates to the field of energy storage circuit technology, and in particular to a supercapacitor energy storage circuit. [Background Technology] Due to technological advancements and climate change, the global adoption rate of central air conditioning is continuously increasing. During operation, the exhaust ducts of central air conditioning systems are affected by the transmission medium (such as steam or hot airflow), which can easily create a temperature difference with the external environment, resulting in a large amount of residual heat remaining in the exhaust ducts.

[0003] Currently, thermoelectric power generation (TEG) is becoming a major trend in the utilization of waste heat from exhaust systems. However, existing technologies for using TEG to recover waste heat from pipelines are limited, especially in the energy storage stage, where suitable energy storage circuits are lacking. Current energy storage circuits struggle to adjust their operating status based on real-time temperature differences across the thermoelectric plate, leading to voltage overload or undervoltage during temperature fluctuations. This not only increases power generation losses but also exacerbates component wear, shortens circuit lifespan, and fails to achieve efficient waste heat recovery and stable energy storage, thus failing to meet the demands for energy conservation and long-term reliable circuit operation. [Utility Model Content] To solve the above-mentioned technical problems, this utility model provides a supercapacitor energy storage circuit.

[0005] To achieve the above objectives, this utility model is implemented by the following technical solution: A supercapacitor energy storage circuit includes: A thermoelectric power supply module, which includes a low temperature difference power supply mode and a high temperature difference power supply mode, is used to convert waste heat into electrical energy. A DC-DC conversion module, wherein the input terminal of the DC-DC conversion module is connected to the power output terminal of the thermoelectric power supply module, and the DC-DC conversion module is used to convert the electrical energy converted by the thermoelectric power supply module into a stable DC voltage; A supercapacitor bank, the input terminal of which is connected to the output terminal of the DC-DC conversion module, is used to store the electrical energy converted by the thermoelectric power supply module; A temperature acquisition module is provided, the power supply terminal of which is connected to the output terminal of the DC-DC conversion module. The temperature acquisition module is used to acquire the hot end temperature and cold end temperature of the thermoelectric power supply module in real time. The main control module has its input terminal connected to the signal output terminal of the temperature acquisition module and its output terminal connected to the switching terminal of the thermoelectric power supply module. The main control module controls the thermoelectric power supply module to execute the high temperature difference power supply mode if the difference between the hot end temperature and the cold end temperature exceeds a preset temperature difference threshold.

[0006] By adopting the above technical solution, the thermoelectric power supply module converts the waste heat in the central air conditioning duct into directly usable electrical energy, realizing the recovery and storage of waste heat in the duct, avoiding energy waste. Moreover, the main control module can control the power supply mode of the thermoelectric power supply module based on the temperature difference changes across the thermoelectric power supply module collected in real time by the temperature acquisition module. This ensures that the thermoelectric power supply module can adopt the most suitable power supply mode under any temperature difference condition, keeping the thermoelectric power supply module in the optimal power generation state and minimizing power generation losses. Secondly, adopting an appropriate power supply mode based on the temperature difference changes across the thermoelectric power supply module can avoid voltage overload or voltage undervoltage, reduce component losses, and extend the service life of the circuit.

[0007] As described above, in a supercapacitor energy storage circuit, the thermoelectric power supply module includes multiple TEG thermocouples and multiple drive units. The low temperature differential power supply mode divides the multiple TEG thermocouples into at least two groups of TEG units. Each TEG unit is composed of multiple TEG thermocouples connected in series. Each group of TEG units is connected in parallel, and the parallel port after parallel connection is connected to the input terminal of one of the drive units. The output terminal of the drive unit is connected to the input terminal of the DC-DC conversion module. The high temperature difference power supply mode is that each of the TEG temperature difference plates and each of the drive units are connected in series, and the series port after the series connection is connected to the input terminal of the DC-DC conversion module.

[0008] As described above, in a supercapacitor energy storage circuit, the driving unit includes a boost chip, which is used to boost the low voltage output by the TEG thermoelectric sensor.

[0009] As described above, in a supercapacitor energy storage circuit, the DC-DC conversion module includes: The DC-DC converter has its input terminal connected to the power output terminal of the thermoelectric power supply module, its output terminal connected to the input terminal of the supercapacitor bank, and its output terminal also connected to the power supply terminal of the temperature acquisition module.

[0010] As described above, in a supercapacitor energy storage circuit, the temperature acquisition module includes: A temperature sensor is provided, with its power supply terminal connected to the output terminal of the DC-DC conversion module and its signal output terminal connected to the input terminal of the main control module.

[0011] As described above, in a supercapacitor energy storage circuit, the main control module includes: The control chip has its input terminal connected to the signal output terminal of the temperature acquisition module. The control chip outputs a high temperature difference switching signal if the difference between the hot end temperature and the cold end temperature exceeds a preset temperature difference threshold. A switching unit is provided, the input of which is connected to the output of the control chip, and the output of which is connected to the switching terminal of the thermoelectric power supply module. When the switching unit receives the high temperature difference switching signal, it controls the thermoelectric power supply module to execute the high temperature difference power supply mode.

[0012] In the supercapacitor energy storage circuit described above, the switching unit is a double-pole double-throw switch.

[0013] The supercapacitor energy storage circuit described above further includes: The sampling module has its input terminal connected to the voltage feedback terminal of the supercapacitor bank and its output terminal connected to the voltage sampling terminal of the main control module. The sampling module is used to collect the voltage changes of the supercapacitor bank. The display module is connected to the display terminal of the main control module, and the display module is used to display the operating parameters of the supercapacitor energy storage circuit.

[0014] In the supercapacitor energy storage circuit described above, the sampling module includes a sampling resistor, one end of which is connected to the voltage feedback terminal of the supercapacitor bank, and the other end of which is connected to the voltage sampling terminal of the main control module.

[0015] In the supercapacitor energy storage circuit described above, the display module includes an OLED display screen, which is electrically connected to the main control module.

[0016] Compared with the prior art, the supercapacitor energy storage circuit proposed in this utility model has the following beneficial effects: 1. The supercapacitor energy storage circuit proposed in this utility model can control the power supply mode of the thermoelectric power supply module based on the temperature difference changes across the thermoelectric power supply module collected in real time by the temperature acquisition module. This ensures that the thermoelectric power supply module can adopt the most suitable power supply mode under any temperature difference condition, keeping the thermoelectric power supply module in the optimal power generation state and minimizing power generation losses. Secondly, adopting an appropriate power supply mode based on the temperature difference changes across the thermoelectric power supply module can avoid voltage overload or voltage undervoltage, reduce component losses, and extend the service life of the circuit.

[0017] 2. The supercapacitor energy storage circuit proposed in this utility model includes a thermoelectric power supply module, which can convert waste heat into directly usable electrical energy, thereby realizing the recovery and storage of waste heat in the pipeline and avoiding energy waste. [Attached Image Description] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a block diagram illustrating the circuit principle structure of this utility model; Figure 2 This is the circuit schematic diagram of this utility model; Figure 3 This is a circuit diagram of the thermoelectric power supply module of this utility model.

Detailed Implementation Methods

[0021] The supercapacitor energy storage circuit proposed in this specification is mainly used to store the electrical energy converted by the thermoelectric power supply module. The thermoelectric power supply module converts waste heat into electrical energy, which can be applied to waste heat in central air conditioning ducts, exhaust ducts in industrial workshops, or other scenarios with ductwork. This specification primarily uses central air conditioning ducts as an implementation scenario. Other implementation scenarios can be referred to in this specification, and will not be elaborated further here.

[0022] Specific embodiments, combined with Figures 1 to 3As shown, further illustrating the technical solution of this utility model, a supercapacitor energy storage circuit includes a thermoelectric power supply module 100, a DC-DC conversion module 200, a supercapacitor bank 300, a temperature acquisition module 400, and a main control module 500. The thermoelectric power supply module 100 includes a low temperature difference power supply mode and a high temperature difference power supply mode. The thermoelectric power supply module 100 is used to convert waste heat into electrical energy. The input terminal of the DC-DC conversion module 200 is connected to the power output terminal of the thermoelectric power supply module 100. The DC-DC conversion module 200 is used to convert the electrical energy converted by the thermoelectric power supply module 100 into a stable DC voltage. The input terminal of the supercapacitor bank 300 is connected to the DC-DC conversion module 200. The output terminal of the supercapacitor group 300 is connected to store the electrical energy converted by the thermoelectric power supply module 100. The power supply terminal of the temperature acquisition module 400 is connected to the output terminal of the DC-DC conversion module 200. The temperature acquisition module 400 is used to collect the hot end temperature and cold end temperature of the thermoelectric power supply module 100 in real time. The input terminal of the main control module 500 is connected to the signal output terminal of the temperature acquisition module 400. The output terminal of the main control module 500 is connected to the switching terminal of the thermoelectric power supply module 100. The main control module 500 controls the thermoelectric power supply module 100 to execute the high temperature difference power supply mode if the difference between the hot end temperature and the cold end temperature exceeds a preset temperature difference threshold.

[0023] The hot end of the thermoelectric power supply module 100 refers to the end that is in contact with the exhaust airflow from the duct, and the cold end of the thermoelectric power supply module 100 refers to the end that is far away from the exhaust airflow from the duct.

[0024] In this embodiment, the thermoelectric power supply module converts the waste heat in the central air conditioning duct into directly usable electrical energy, realizing the recovery and storage of waste heat in the duct, avoiding energy waste. Furthermore, the main control module can control the power supply mode of the thermoelectric power supply module based on the temperature difference changes across the two ends of the thermoelectric power supply module collected in real time by the temperature acquisition module. This ensures that the thermoelectric power supply module can adopt the most suitable power supply mode under any temperature difference condition, keeping the thermoelectric power supply module in the optimal power generation state and minimizing power generation losses. Secondly, adopting an appropriate power supply mode based on the temperature difference changes across the two ends of the thermoelectric power supply module can avoid voltage overload or voltage undervoltage, reduce component losses, and extend the service life of the circuit.

[0025] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the thermoelectric power supply module 100 includes a plurality of TEG temperature differential plates 110 and a plurality of drive units 120.

[0026] The driving unit 120[1][2] includes a boost chip, which is used to boost the low voltage output by the TEG thermocouple 110.

[0027] Alternatively, the boost chip in this embodiment is preferably SX1308.

[0028] Specifically, the thermoelectric power supply module 100 in this embodiment utilizes the Seebeck effect to generate electricity from waste heat. The Seebeck effect is a thermoelectric conversion effect, meaning that when there is a temperature difference between the two ends of a closed circuit composed of two different conductors or semiconductors, an electromotive force will be generated in the circuit, thereby forming a current. The TEG thermocouple 110 in this embodiment is the core power generation component of the thermoelectric power supply module 100. Based on the Seebeck effect, when there is a temperature difference between the two ends of the TEG thermocouple 110 (i.e., the end in contact with the exhaust airflow of the central air conditioning duct and the end away from the exhaust airflow in the central air conditioning duct), a DC electromotive force will be generated, thereby converting heat energy into electrical energy.

[0029] As a preferred embodiment, please refer to the accompanying drawings. Figure 3 As shown, the low temperature differential power supply mode divides the multiple TEG thermocouples 110 into at least two groups of TEG units. Each TEG unit is composed of multiple TEG thermocouples 110 connected in series. Each group of TEG units is connected in parallel, and the parallel port after the parallel connection is connected to the input terminal of one of the drive units 120. The output terminal of the drive unit 120 is connected to the input terminal of the DC-DC conversion module 200.

[0030] Alternatively, in this embodiment, the low temperature differential power supply mode divides the multiple TEG thermocouples 110 into two groups of TEG units, and each TEG unit is composed of four TEG thermocouples 110 connected in series.

[0031] Specifically, when the temperature difference between the hot end and cold end of the thermoelectric power supply module 100 is small, the voltage and current output of a single TEG thermocouple 110 are both low. Directly connecting it to the DC-DC converter module 200 will result in ineffective utilization due to the low output voltage and current. Connecting the TEG thermocouples 110 in series to form multiple TEG units can effectively improve the output voltage. According to the characteristics of series circuits, the total output voltage is the sum of the voltages of each series component. Secondly, multiple TEG units are connected in parallel. According to the characteristics of parallel circuits, the total output current is the sum of the currents of each parallel component, which can effectively increase the output current of the thermoelectric plate. Through the low temperature difference power supply mode, it is ensured that the thermoelectric power supply module 100 can still effectively recover heat energy under the low temperature difference state, thus avoiding energy waste.

[0032] As a preferred embodiment, please refer to the accompanying drawings. Figure 3 As shown, the high temperature difference power supply mode is that each of the TEG temperature difference plates 110 and each of the drive units 120 are connected in series, and the series port after the series connection is connected to the input terminal of the DC-DC conversion module 200.

[0033] Alternatively, the high temperature difference power supply mode of this embodiment includes four TEG thermoelectric plates 110 and four drive units 120, with the four TEG thermoelectric plates 110 and the four drive units 120 connected in series individually.

[0034] Specifically, when the temperature difference between the hot end and cold end of the thermoelectric power supply module 100 is large, a single TEG thermocouple 110 can output a higher voltage and current. At this time, by connecting each TEG thermocouple 110 in series with each drive unit 120, the output voltage can be increased to meet the operating voltage requirements of the DC-DC conversion module 200. If the connection method of low temperature difference power supply mode is still used at this time, the output voltage of the TEG thermocouple 110 itself is high under high temperature difference conditions, which will cause the output voltage after series and parallel connection to far exceed the withstand voltage value of the drive unit 120, causing the drive unit 120 to burn out.

[0035] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the DC-DC conversion module 200 includes a DC-DC converter, the input terminal of which is connected to the power output terminal of the thermoelectric power supply module 100, the output terminal of which is connected to the input terminal of the supercapacitor bank 300, and the output terminal of which is also connected to the power supply terminal of the temperature acquisition module 400.

[0036] The preferred model of the DC-DC converter is TXS0102DCUR.

[0037] In this embodiment, since the output voltage of the thermoelectric power supply module is greatly affected by temperature fluctuations, the unstable DC voltage output by the thermoelectric power supply module is converted into a stable DC voltage through the voltage regulation of the DC-DC converter. This provides a stable power supply voltage for other modules such as the supercapacitor bank and the temperature acquisition module, avoiding damage to the supercapacitor bank or large errors in the temperature signal acquired by the temperature acquisition module due to unstable input voltage.

[0038] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the supercapacitor bank 300 is composed of multiple supercapacitors connected in series.

[0039] The specific number of supercapacitors connected in series in the supercapacitor group 300 can be adjusted according to actual usage requirements. For example, if the storage capacity is to be increased, the number of series connections can be increased appropriately; otherwise, it can be reduced appropriately. This application does not make a specific limit on the specific number.

[0040] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the temperature acquisition module 400 includes a temperature sensor, the power supply terminal of which is connected to the output terminal of the DC-DC conversion module 200, and the signal output terminal of which is connected to the input terminal of the main control module 500.

[0041] The preferred model of the temperature sensor is DS18B20.

[0042] In this embodiment, the DC-DC conversion module provides a stable operating voltage for the temperature sensor. After the temperature sensor starts operating, it monitors the cold and hot junction temperatures of the thermoelectric power supply module in real time and converts the collected temperatures into digital signals, which are then transmitted to the main control module. The main control module then analyzes and processes the received digital signals. Secondly, the temperature sensor selected in this embodiment has an accuracy of ±0.4℃ within the range of -10℃ to 70℃. This provides high measurement accuracy for applications in pipelines, ensuring the accuracy of temperature signal acquisition and enabling the main control module to switch the power supply mode of the thermoelectric power supply module with greater precision.

[0043] Furthermore, as a preferred embodiment of this solution and not a limitation, the main control module 500 includes a control chip 510 and a switching unit 520. The input terminal of the control chip 510 is connected to the signal output terminal of the temperature acquisition module 400. The control chip 510 outputs a high temperature difference switching signal if the difference between the hot end temperature and the cold end temperature exceeds a preset temperature difference threshold. The input terminal of the switching unit 520 is connected to the output terminal of the control chip 510, and the output terminal of the switching unit 520 is connected to the switching terminal of the thermoelectric power supply module 100. When the switching unit 520 receives the high temperature difference switching signal, it controls the thermoelectric power supply module 100 to execute the high temperature difference power supply mode.

[0044] Specifically, after receiving the hot end temperature and cold end temperature of the thermoelectric power supply module 100 collected in real time by the temperature acquisition module 400, the control chip 510 analyzes and processes the hot end temperature and cold end temperature to obtain the current temperature difference value, and compares the current temperature difference value with the preset temperature difference threshold. If the preset temperature difference threshold is exceeded, the control chip 510 outputs a high temperature difference switching signal. When the switching unit 520 receives the high temperature difference switching signal, the switching unit 520 first disconnects the conduction circuit of the current low temperature difference power supply mode, and then switches to the conduction circuit of the high temperature difference power supply mode, so that the thermoelectric power supply module 100 can implement the high temperature difference power supply mode. Similarly, if the temperature difference is lower than the preset temperature difference threshold, the control chip 510 outputs a low temperature difference switching signal. When the switching unit 520 receives the low temperature difference switching signal, the switching unit 520 will first disconnect the conduction circuit of the current high temperature difference power supply mode, and then switch to the conduction circuit of the low temperature difference power supply mode, so that the thermoelectric power supply module 100 can implement the low temperature difference power supply mode.

[0045] It should be noted that the above-mentioned preset temperature difference threshold can be adjusted according to the actual use environment. In this embodiment, the preset temperature difference threshold is preferably 15℃.

[0046] In this embodiment, the main control module can control the power supply mode of the thermoelectric power supply module based on the temperature difference changes across the thermoelectric power supply module collected in real time by the temperature acquisition module. This ensures that the thermoelectric power supply module can adopt the most suitable power supply mode under any temperature difference condition, keeping the thermoelectric power supply module in the optimal power generation state and minimizing power generation losses. Secondly, adopting a suitable power supply mode based on the temperature difference changes across the thermoelectric power supply module can avoid voltage overload or voltage undervoltage, reduce component losses, and extend the service life of the circuit.

[0047] In a preferred embodiment, the control chip 510 is preferably an STM32F103RET6, and the switching unit 520 is preferably a double-pole double-throw switch.

[0048] Furthermore, as a preferred embodiment of this solution and not a limitation, it also includes a sampling module 600 and a display module 700. The input terminal of the sampling module 600 is connected to the voltage feedback terminal of the supercapacitor bank 300, and the output terminal of the sampling module 600 is connected to the voltage sampling terminal of the main control module 500. The sampling module 600 is used to collect the voltage changes of the supercapacitor bank 300. The display terminal of the display module 700 is connected to the display terminal of the main control module 300, and the display module 700 is used to display the operating parameters of the supercapacitor energy storage circuit.

[0049] The operating parameters include, but are not limited to, the capacitor voltage of the supercapacitor bank 300, the collected temperature information, and the power supply mode information.

[0050] In a preferred embodiment, the sampling module 600 includes a sampling resistor, one end of which is connected to the voltage feedback terminal of the supercapacitor group 300, and the other end of which is connected to the voltage sampling terminal of the main control module 500.

[0051] Specifically, the sampling resistor, supercapacitor bank 300, and main control module 500 form a voltage divider sampling circuit. When the supercapacitor bank 300 is working, the voltage across its terminals changes with the energy storage state (increasing during charging and decreasing during discharging). At this time, when the current output by the supercapacitor bank 300 flows through the sampling resistor, a voltage drop proportional to the voltage of the supercapacitor bank 300 (i.e., voltage change signal) is generated across the sampling resistor. After receiving the voltage change signal, the voltage sampling terminal of the main control module 500 analyzes and processes it, converting the acquired voltage change signal into the voltage value of the supercapacitor bank 300, thereby realizing the real-time acquisition of the voltage value of the supercapacitor bank 300.

[0052] In a preferred embodiment, the display module includes an OLED screen, which is electrically connected to the main control module 500.

[0053] In this embodiment, the operating parameters such as the supercapacitor's charge, output voltage, and temperature difference data of the thermoelectric power supply module are visualized through an OLED display, which helps users to promptly identify and troubleshoot any abnormalities.

[0054] Those skilled in the art should understand that the above description is one embodiment provided in conjunction with specific content, and does not imply that the specific implementation of this utility model is limited to these descriptions. Furthermore, due to differences in industry naming conventions, it is not limited to the above names or English names. Any methods or structures similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the scope of protection of this utility model.

Claims

1. A supercapacitor energy storage circuit, characterized in that, include: A thermoelectric power supply module, which includes a low temperature difference power supply mode and a high temperature difference power supply mode, is used to convert waste heat into electrical energy. A DC-DC conversion module, wherein the input terminal of the DC-DC conversion module is connected to the power output terminal of the thermoelectric power supply module, and the DC-DC conversion module is used to convert the electrical energy converted by the thermoelectric power supply module into a stable DC voltage; A supercapacitor bank, the input terminal of which is connected to the output terminal of the DC-DC conversion module, is used to store the electrical energy converted by the thermoelectric power supply module; A temperature acquisition module is provided, the power supply terminal of which is connected to the output terminal of the DC-DC conversion module. The temperature acquisition module is used to acquire the hot end temperature and cold end temperature of the thermoelectric power supply module in real time. The main control module has its input terminal connected to the signal output terminal of the temperature acquisition module and its output terminal connected to the switching terminal of the thermoelectric power supply module. The main control module controls the thermoelectric power supply module to execute the high temperature difference power supply mode if the difference between the hot end temperature and the cold end temperature exceeds a preset temperature difference threshold.

2. The supercapacitor energy storage circuit according to claim 1, characterized in that, The thermoelectric power supply module includes multiple TEG thermocouples and multiple drive units. The low temperature differential power supply mode divides the multiple TEG thermocouples into at least two groups of TEG units. Each TEG unit is composed of multiple TEG thermocouples connected in series. Each group of TEG units is connected in parallel. The parallel port after the parallel connection is connected to the input terminal of one of the drive units. The output terminal of the drive unit is connected to the input terminal of the DC-DC conversion module. The high temperature difference power supply mode is that each of the TEG temperature difference plates and each of the drive units are connected in series, and the series port after the series connection is connected to the input terminal of the DC-DC conversion module.

3. The supercapacitor energy storage circuit according to claim 2, characterized in that, The driving unit includes a boost chip, which is used to boost the low voltage output by the TEG thermocouple.

4. The supercapacitor energy storage circuit according to claim 1, characterized in that, The DC-DC conversion module includes: The DC-DC converter has its input terminal connected to the power output terminal of the thermoelectric power supply module, its output terminal connected to the input terminal of the supercapacitor bank, and its output terminal also connected to the power supply terminal of the temperature acquisition module.

5. A supercapacitor energy storage circuit according to claim 1, characterized in that, The temperature acquisition module includes: A temperature sensor is provided, with its power supply terminal connected to the output terminal of the DC-DC conversion module and its signal output terminal connected to the input terminal of the main control module.

6. A supercapacitor energy storage circuit according to claim 1, characterized in that, The main control module includes: The control chip has its input terminal connected to the signal output terminal of the temperature acquisition module. The control chip outputs a high temperature difference switching signal if the difference between the hot end temperature and the cold end temperature exceeds a preset temperature difference threshold. A switching unit is provided, the input of which is connected to the output of the control chip, and the output of which is connected to the switching terminal of the thermoelectric power supply module. When the switching unit receives the high temperature difference switching signal, it controls the thermoelectric power supply module to execute the high temperature difference power supply mode.

7. A supercapacitor energy storage circuit according to claim 6, characterized in that, The switching unit is a double-pole double-throw switch.

8. A supercapacitor energy storage circuit according to claim 1, characterized in that, Also includes: The sampling module has its input terminal connected to the voltage feedback terminal of the supercapacitor bank and its output terminal connected to the voltage sampling terminal of the main control module. The sampling module is used to collect the voltage changes of the supercapacitor bank. The display module is connected to the display terminal of the main control module, and the display module is used to display the operating parameters of the supercapacitor energy storage circuit.

9. A supercapacitor energy storage circuit according to claim 8, characterized in that, The sampling module includes a sampling resistor, one end of which is connected to the voltage feedback terminal of the supercapacitor bank, and the other end of which is connected to the voltage sampling terminal of the main control module.

10. A supercapacitor energy storage circuit according to claim 8, characterized in that, The display module includes an OLED display screen, which is electrically connected to the main control module.

Images