Super capacitor module based on independent power supply

Abstract

The utility model provides a super capacitor module based on independent power supply, which comprises a shell, a charging circuit, a super capacitor, a Boost circuit and a control circuit, the super capacitor, the charging circuit, the Boost circuit and the control circuit are all arranged in the shell, the super capacitor is composed of at least one 5F super capacitor unit, the charging circuit is connected with the Boost circuit, and the control circuit is connected with the charging circuit. The input side of the Boost circuit is connected with a super capacitor, the control circuit is integrated with a switched capacitor circuit, the voltage of a super capacitor unit is monitored and balanced in real time, the precision is balanced, and the charging circuit comprises a constant-current charging module and an overvoltage protection unit; according to the utility model, the problems of short cycle life, poor low-temperature performance and complex structure of the traditional lithium battery scheme are solved through the modularized energy storage architecture.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a supercapacitor module based on independent power supply. Background Technology

[0002] Current smart toilet flushing systems primarily rely on lithium battery packs for power. The technical limitations of lithium battery pack power include the following:

[0003] 1. Short cycle life: The charge-discharge cycle life of lithium battery packs is about 500 times, and the capacity decays to less than 80% of the initial value, which cannot meet the requirements of high-frequency use;

[0004] 2. Poor low-temperature performance: When the ambient temperature is below 5℃, the discharge efficiency drops by more than 40%, resulting in a significant decrease in stability during winter use;

[0005] 3. High size and complexity: Lithium battery packs require complex circuit boards and multi-layer protection structures, which occupy a lot of space and are difficult to assemble. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a supercapacitor module based on independent power supply that solves the problems of short cycle life, poor low-temperature performance and complex structure of traditional lithium battery solutions through a modular energy storage architecture.

[0007] This utility model is implemented using the following method: a supercapacitor module based on independent power supply, including a shell, a charging circuit, a supercapacitor, a boost circuit, and a control circuit. The supercapacitor, charging circuit, boost circuit, and control circuit are all disposed within the shell. The supercapacitor is composed of at least one 5F supercapacitor unit. The input side of the boost circuit is connected to the supercapacitor. The control circuit integrates a switched capacitor circuit to monitor and balance the voltage of the supercapacitor unit in real time, ensuring balancing accuracy. The charging circuit includes a constant current charging module and an overvoltage protection unit.

[0008] Furthermore, each capacitor unit of the supercapacitor uses nitrogen-doped porous carbon electrode material with a specific capacitance ≥200F / g, and the electrodes are fixed together by laser welding.

[0009] Furthermore, the outer shell has a thickness of 1.2±0.1mm, an internal hollow cavity, and heat dissipation fins on both sides of the cavity. The heat dissipation fins of the outer shell have a spacing of 5mm and a depth of 3mm, and the surface is sprayed with thermal grease to enhance heat dissipation performance.

[0010] Furthermore, the control circuit operates in a temperature range of -40℃ to 85℃ and has a built-in temperature compensation algorithm that automatically adjusts the equilibrium threshold according to the ambient temperature.

[0011] Furthermore, the output voltage of the Boost circuit is stabilized at 8.5V±0.5V, with a conversion efficiency of ≥92%.

[0012] Furthermore, the supercapacitor consists of at least one or more 5F supercapacitor units connected in parallel.

[0013] Furthermore, the outer shell is composed of an outer layer made of flame-retardant plastic material and an inner layer made of aluminum alloy.

[0014] Furthermore, the flame-retardant plastic material is flame-retardant ABS material.

[0015] The beneficial effects of this utility model are as follows: This utility model can solve the technical defects of existing lithium battery power supply solutions, such as short cycle life, poor low temperature adaptability and complex structure, by constructing a hybrid energy storage architecture based on supercapacitors. Through a composite shell, nitrogen-doped electrode supercapacitor group and synchronous rectification Boost circuit, it can realize long-term power supply for the electric flushing system of smart toilets; the module supports wide temperature range operation from -40℃ to 65℃, has a cycle life of over 500,000 cycles, and its volume is only 1 / 3 of that of traditional solutions, making installation convenient; the control circuit combined with temperature compensation algorithm further improves the stability and safety of the system. Attached Figure Description

[0016] Figure 1 This is a circuit block diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the outer shell.

[0018] In the diagram: outer shell-1, flame-retardant ABS outer layer-2, aluminum alloy inner layer-3, heat dissipation fins-4. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Example 1: Installation and Workflow of Supercapacitor Module

[0021] Installation steps:

[0022] The module is fixed to the inner left side of the smart toilet tank with M4 stainless steel screws, with a mounting hole spacing of 60mm.

[0023] Connect the CN3 interface of the module to the power interface of the toilet motherboard. The power cable is made of AWG18 silicone wire with a length of 10cm.

[0024] After the mains power is connected, the charging protection circuit automatically starts to charge the supercapacitor bank with constant current.

[0025] Circuit connection diagram ( Figure 1 ):

[0026] The positive terminal of the supercapacitor bank is connected to the input terminal of the Boost circuit, and the negative terminal is grounded.

[0027] The output of the Boost circuit is connected to the pulse valve drive of the toilet flushing circuit via a CN3 interface.

[0028] The detection pins of the dynamic equalization control module are connected to the positive terminals of each supercapacitor unit.

[0029] Workflow example:

[0030] When the mains power is normal: the charging circuit charges the supercapacitor bank with a current of 45mA, and the control module shuts down Q2 and Q7 to block the discharge circuit;

[0031] When the mains power is interrupted: When the user presses the flush button, Q2 and Q3 are turned on. When the voltage of the supercapacitor bank is >3.7V, the Boost circuit starts to boost the voltage to 8.5V, driving the pulse valve to work for 30 seconds;

[0032] When the voltage is below 3.7V: the control module cuts off the discharge circuit to prevent undervoltage damage to the circuit.

[0033] Example 2: Performance Test Data

[0034] Cyclic life test:

[0035] At 25℃, under charge-discharge cycling at 1A current, the measured number of cycles exceeded 520,000, with a capacity decay of only 4.3%.

[0036] Test method: Refer to GB / T 36280-2018 Supercapacitor Cycle Life Standard.

[0037] Low-temperature start-up test:

[0038] After being placed in a -30℃ constant temperature chamber for 24 hours, the module startup time was 2.8 seconds and the discharge efficiency was 83.1%.

[0039] Test equipment: High and low temperature test chamber (model GDJW-100C).

[0040] Structural reliability testing:

[0041] The composite casing was subjected to a 1.5-meter drop test, and the casing did not crack, while the internal circuitry functioned normally.

[0042] Vibration test (frequency 10Hz~200Hz, acceleration 5g), no abnormalities were observed after 2 hours.

[0043] The supercapacitor module mainly consists of a casing, a charging circuit, a supercapacitor, a boost circuit, and a control circuit.

[0044] Housing: Made of flame-retardant and impact-resistant materials, such as flame-retardant ABS, to ensure reliable and durable installation. The housing is designed with a hollow structure to accommodate other modules.

[0045] Charging circuit: Enables constant current charging to ensure that the charging current is not too large and could burn out the components.

[0046] Supercapacitors: Used to store electrical energy, providing a stable power source for smart toilets.

[0047] Boost circuit: Upgrades the supercapacitor module's power to 8.5V, sufficient for the smart toilet's flushing function.

[0048] Control circuit: Responsible for managing and controlling the power system of the entire supercapacitor module. It includes charging management circuit, voltage conversion circuit, and power distribution circuit, etc.

[0049] Topological innovation: Supercapacitors + Boost circuits replace lithium battery packs, eliminating redundant protection circuits;

[0050] Material innovation: a synergistic impact-resistant design combining a flame-retardant ABS shell with laser-welded capacitor banks;

[0051] Control innovation: Wide-temperature-range adaptive voltage compensation algorithm.

[0052] Please see Figure 1 As shown, the working principle of this utility model is as follows:

[0053] a) When mains power is available, the toilet mainboard can perform normal flushing. The module is connected to the toilet mainboard via CN3. The toilet mainboard provides power 1. To prevent excessive charging voltage, power 2 is obtained through U1. This power then passes through R3, Q4, Q5, and D5 to provide constant current charging for EC2, overvoltage protection, and unidirectional current conduction. Because of the presence of power 1, Q11 is always in the on state, keeping Q2 and Q7 in the off state. EC2 current cannot flow into the subsequent circuit, and power 3 is de-energized, thus preventing power 3 from interfering with power 1.

[0054] b) When there is no mains power, pressing the flush button activates Q1, Q7, and Q2. When the voltage of power supply 4 is greater than 3.7V, Q5 and D6 conduct, and current flows through Q5, activating the two self-locking circuits (Q9, R17, R15, C7) and (Q10, R18, R16, C8) shown in box 1. Then, Q3 conducts, and the power supply passes through the boost circuit shown in box 2 to obtain power supply 3. Power supply 3 supplies power to the flushing circuit in the toilet mainboard through CN3, enabling normal flushing. When the voltage of power supply 4 is lower than 3.7V, Q5 and D6 cannot conduct, and the subsequent circuits also cannot conduct, thus protecting the boost circuit (when the voltage is lower than 3.7V, the boost circuit is in an undervoltage state and cannot obtain a stable power supply 3).

[0055] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A supercapacitor module based on independent power supply, characterized in that: The device includes a housing, a charging circuit, a supercapacitor, a boost circuit, and a control circuit. The supercapacitor, charging circuit, boost circuit, and control circuit are all housed within the housing. The supercapacitor consists of at least one 5F supercapacitor unit. The input side of the boost circuit is connected to the supercapacitor. The control circuit integrates a switched capacitor circuit to monitor and balance the voltage of the supercapacitor units in real time, ensuring balancing accuracy. The charging circuit includes a constant current charging module and an overvoltage protection unit.

2. The supercapacitor module based on independent power supply according to claim 1, characterized in that: Each capacitor unit of the supercapacitor uses nitrogen-doped porous carbon electrode material with a specific capacitance ≥200F / g, and the electrodes are fixed together by laser welding.

3. A supercapacitor module based on independent power supply according to claim 1, characterized in that: The outer shell has a thickness of 1.2±0.1mm and an internal hollow cavity. Heat dissipation fins are provided on both sides of the cavity. The heat dissipation fins of the outer shell have a spacing of 5mm and a depth of 3mm. Thermal grease is sprayed on the surface to enhance heat dissipation performance.

4. A supercapacitor module based on independent power supply according to claim 1, characterized in that: The control circuit operates in a temperature range of -40℃ to 85℃ and has a built-in temperature compensation algorithm that automatically adjusts the equalization threshold according to the ambient temperature.

5. A supercapacitor module based on independent power supply according to claim 1, characterized in that: The output voltage of the Boost circuit is stable at 8.5V±0.5V, with a conversion efficiency of ≥92%.

6. A supercapacitor module based on independent power supply according to claim 1, characterized in that: The supercapacitor consists of at least one or more 5F supercapacitor units connected in parallel.

7. A supercapacitor module based on independent power supply according to claim 1, characterized in that: The outer shell is composed of an outer layer made of flame-retardant plastic and an inner layer made of aluminum alloy.

8. A supercapacitor module based on independent power supply according to claim 7, characterized in that: The flame-retardant plastic material is flame-retardant ABS.

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