Energy storage power supply system and working method

Abstract

The application relates to the energy storage field and discloses an energy storage power supply system and a working method. The system comprises an energy collection module, an energy storage module and an energy control module. The energy collection module is used for converting collected energy into electric energy. The energy storage module is connected with the energy collection module and is used for storing electric energy. The energy control module is connected with the energy storage module and is used for controlling the energy storage module to discharge according to the real-time voltage of the energy storage module, so that the real-time voltage decreases from a first preset voltage to a second preset voltage. The application can stably supply power to the main body when the energy storage module has sufficient power, fully utilize the stored electric energy in the energy storage module, establish a three-level energy storage architecture of the energy storage module buffer + hysteresis control + wide voltage buck-boost, reduce the frequent charging and discharging loss of the battery caused by energy output fluctuation, realize full-working-condition adaptive energy storage, flexibly adapt to the diversified power module demand, flexibly adjust the charging and power supply mode, and maximize the solar energy utilization rate.

Description

Technical Field

[0001] This application relates to the field of energy conversion and storage technology, specifically to an energy storage power system and its operating method. Background Technology

[0002] Energy storage power systems can be built based on renewable energy sources, such as wind and solar energy, and electromagnetic radiation energy, such as microwave and infrared energy. These energy sources can be converted into electrical energy and directly stored in energy storage batteries or energy storage modules to power the power modules, thus providing a more stable and sustainable energy support for mankind.

[0003] However, in existing technologies, energy storage elements cannot effectively store the electrical energy obtained from energy conversion, nor can they stably output energy that meets the operating requirements of subsequent circuits. Summary of the Invention

[0004] In view of this, this application provides an energy storage power system and its operating method to solve the problems of poor solar energy storage effect and limited energy utilization.

[0005] In a first aspect, this application provides an energy storage power system, which includes: an energy harvesting module, an energy storage module, and an energy control module;

[0006] The energy harvesting module is used to collect energy and convert the collected energy into electrical energy;

[0007] An energy storage module, connected to an energy harvesting module, is used to store electrical energy;

[0008] An energy control module, connected to an energy storage module, is used to control the discharge of the energy storage module based on its real-time voltage, thereby reducing the real-time voltage of the energy storage module from a first preset voltage to a second preset voltage.

[0009] The energy storage power system provided in this application collects energy and converts it into electrical energy through an energy harvesting module. The electrical energy is stored in the energy storage module, and the energy control module controls the energy storage module to discharge from a first preset voltage to a second preset voltage according to the real-time voltage of the energy storage module. It can stably supply power to the main body when the energy storage module has sufficient power, making full use of the electrical energy stored in the energy storage module. At the same time, it can establish a three-level energy storage architecture of energy storage module buffer + hysteresis control + wide voltage buck-boost, reducing the frequent charging and discharging losses of the battery due to energy output fluctuations, realizing adaptive energy storage under all working conditions, and flexibly adapting to the needs of diverse power modules, flexibly adjusting charging and power supply methods, and maximizing energy utilization.

[0010] In one optional embodiment, the energy control module includes a comparator circuit and a first switch; a first terminal of the comparator circuit is connected to the energy storage module, a second terminal of the comparator circuit is connected to the first switch, and the first switch is connected to the output terminal of the energy storage module; the comparator circuit is used to detect the real-time voltage of the energy storage module after storing electrical energy, and when the detected real-time voltage reaches a first preset voltage, it controls the first switch to close so that the energy storage module discharges; until the real-time voltage drops to a second preset voltage after discharge, it controls the first switch to open so that the energy storage module stops discharging.

[0011] This embodiment controls the switch based on a preset voltage range using a comparison circuit. After storing a certain amount of electrical energy in the energy storage module, it can discharge it once and ensure charging enable control under the same conditions, stabilize the power supply, and fix the discharge amount. This avoids the inability to store energy when the energy collection is weak, and also avoids excessive voltage when the energy collection is strong, thus achieving adaptive energy storage under all operating conditions.

[0012] In another optional implementation, the system further includes: a buck-boost converter circuit, the input terminal of which is connected to the output terminal of the energy storage module via a first switch; the buck-boost converter circuit converts the output voltage of the energy storage module to a first preset voltage and outputs it to the subsequent circuit, the first preset voltage being greater than the minimum input voltage of the subsequent circuit.

[0013] This implementation method, by deploying a buck-boost integrated conversion circuit, can provide a stable and compatible voltage input for subsequent circuits, thereby ensuring stable power supply under different energy scenarios and improving energy utilization efficiency.

[0014] In another alternative embodiment, the energy storage power system is also connected to a receiving module, which includes a battery and a power consumption module; the input terminal of the battery is connected to the output terminal of the buck-boost converter circuit to enable the energy storage module to charge the battery; the power consumption module is connected to the output terminal of the battery, and also to the output terminal of the buck-boost converter circuit or the output terminal of the energy storage module to enable the energy storage module to charge the battery and supply power to the power consumption module.

[0015] This implementation method, by charging the battery and supplying power to the power module, can directly supply power to the power module when the battery is fully charged, thereby improving energy utilization. It also provides two access methods for the power module, enabling power supply to the power module in different ways. When connected to the buck-boost integrated conversion circuit, it provides the hardware foundation for energy input statistics of the energy storage power system, while when connected to the energy storage module, it improves power supply efficiency and meets different power needs.

[0016] In another alternative implementation, a protection unit is provided between the output terminal of the buck-boost converter circuit and the input terminal of the battery. The protection unit is configured to disconnect when the battery charge reaches a preset charge level.

[0017] This embodiment protects the battery during discharge by deploying a protection unit before the battery, preventing it from being overcharged and remaining in a fully charged state for a long time, thus extending the lifespan of the lithium battery.

[0018] In one optional implementation, the output terminal of the battery is also connected to the input terminal of the energy storage module, which is also used to receive electrical energy transmitted by the battery. When the rated discharge current of the battery cannot meet the power demand of the power consumption module, the battery discharges to the energy storage module.

[0019] This embodiment uses the battery to reverse charge the energy storage module. When the energy storage is insufficient and the rated discharge current of the battery cannot meet the power demand of the power consumption module, the stored power in the battery is transferred to the energy storage module, which then supplies power to the power consumption module. The output voltage of the energy storage module is stabilized by a buck-boost converter circuit to meet the power demand of the power consumption module, thereby ensuring a stable power supply to the power consumption module.

[0020] Secondly, this application provides a method for operating an energy storage power system applied to the first aspect above or any corresponding embodiment, the method comprising:

[0021] The energy control module obtains the real-time voltage of the energy storage module;

[0022] When the real-time voltage reaches the first preset voltage, the energy control module generates a first command and sends it to the first switch, so that the first switch closes based on the first command and the energy storage module begins to discharge.

[0023] When the real-time voltage drops to the second preset voltage, the energy control module generates a second command and sends it to the first switch, so that the first switch opens based on the second command and the energy storage module ends the discharge.

[0024] The working method of the energy storage power system provided in this application enables the energy control module to obtain the real-time voltage of the energy storage module. When the real-time voltage reaches a first preset voltage, the first switch is closed, and the energy storage module begins to discharge. When the real-time voltage drops to a second preset voltage, the first switch is opened, and the energy storage module ends its discharge. This method can stably supply power to the main body when the energy storage module has sufficient charge, making full use of the electrical energy stored in the energy storage module. At the same time, it can establish a three-level energy storage architecture of energy storage module buffer + hysteresis control + wide voltage buck-boost, reducing the frequent charging and discharging losses of the battery due to energy output fluctuations, realizing adaptive energy storage under all operating conditions, and flexibly adapting to the needs of diverse power modules, flexibly adjusting charging and power supply methods, and maximizing energy utilization.

[0025] In one optional implementation, in response to the real-time voltage of the energy storage module dropping from a first preset voltage to a second preset voltage, the output voltage of the energy storage module is converted and output to the subsequent circuit at a stable first preset voltage.

[0026] This implementation method, through voltage regulation, can provide a stable and compatible voltage input to the subsequent circuits, thereby ensuring stable power supply under different energy scenarios and improving energy utilization efficiency.

[0027] In one alternative implementation, when the rated discharge current of the battery in the subsequent circuit cannot meet the power demand of the power consumption module, the energy storage module receives a third command from the battery, and after the energy of the battery is transferred to the energy storage module, the energy storage module supplies power to the power consumption module.

[0028] This implementation method provides a stable and continuous power supply to the power module through reverse charging, ensuring the normal operation of the power module.

[0029] Thirdly, this application provides an electronic device including the energy storage power system of the first aspect or any corresponding embodiment described above.

[0030] This application achieves the following beneficial effects by establishing a three-stage energy storage architecture consisting of energy storage module buffering + hysteresis control + wide voltage buck-boost:

[0031] First, it can collect and store a wide range of current input generated after external energy conversion, which reduces the requirements for the hardware configuration of the energy storage power system.

[0032] Secondly, it can reduce battery losses caused by frequent charging and discharging due to energy fluctuations, and significantly extend battery life.

[0033] Third, it can achieve full-condition self-adaptation and flexibly adjust the charging and discharging strategy to adapt to the diverse power consumption module requirements, greatly improving energy utilization efficiency.

[0034] Fourth, it can achieve charging enable control and stably output energy to meet the working requirements of subsequent circuits. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a structural block diagram of an existing energy storage power system;

[0037] Figure 2 This is a structural block diagram of an energy storage power system according to an embodiment of this application;

[0038] Figure 3 This is a structural block diagram of another energy storage power system according to an embodiment of this application;

[0039] Figure 4a This is a structural block diagram of the hysteresis circuit of another energy storage power system according to an embodiment of this application;

[0040] Figure 4b This is a block diagram of the control circuit composed of dual comparators and a microcontroller in another energy storage power system according to an embodiment of this application;

[0041] Figure 5 This is a structural block diagram of another energy storage power system according to an embodiment of this application;

[0042] Figure 6 This is a structural block diagram of another energy storage power system according to an embodiment of this application;

[0043] Figure 7 This is a structural block diagram of another energy storage power system according to an embodiment of this application;

[0044] Figure 8 This is a structural block diagram of yet another energy storage power system according to an embodiment of this application;

[0045] Figure 9 This is a flowchart illustrating the operation method of an energy storage power system according to an embodiment of this application;

[0046] Figure 10 This is a structural block diagram of an electronic device according to an embodiment of this application.

[0047] Figure captions:

[0048] 10-Energy harvesting module; 20-Energy storage module; 30-Energy control module; 301-Comparison circuit; 302-First switch; 40-Boost-buck converter circuit. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] The relevant technologies include the following energy storage power systems: such as Figure 1As shown, existing energy storage systems convert energy into electrical energy and store it directly in batteries or capacitors, which then supply power to the power-consuming modules. This method cannot effectively store the electrical energy converted from energy, nor can it stably output energy that meets the operating requirements of subsequent circuits; moreover, this method has low efficiency in a single charge and discharge cycle.

[0051] In summary, the energy utilization rate of energy conversion circuits in related technologies is limited. Therefore, this application provides an energy storage power system that achieves the effect of adaptive energy storage under all operating conditions and full utilization of energy by establishing a three-level energy storage architecture of energy storage module buffer + hysteresis control + wide voltage boost / buck.

[0052] According to an embodiment of this application, an energy storage power system embodiment is provided. It should be noted that, as used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0053] This embodiment provides an energy storage power system. Figure 2 This is a structural block diagram of an energy storage power system according to an embodiment of this application, such as... Figure 2 As shown, the system includes: an energy harvesting module 10, an energy storage module 20, and an energy control module 30; the connection relationship between the three modules is as follows: Figure 2 As shown.

[0054] The energy harvesting module 10 is used to harvest energy and convert the harvested energy into electrical energy. The energy storage module 20 is connected to the energy harvesting module 10 and is used to store electrical energy. The energy control module 30 is connected to the energy storage module 20 and is used to control the energy storage module 20 to discharge according to the real-time voltage of the energy storage module 20, so that the real-time voltage of the energy storage module 20 drops from a first preset voltage to a second preset voltage.

[0055] Specifically, in one embodiment, the energy harvesting module 10 is set according to the type of renewable energy. For example, a solar panel is used as the solar energy harvesting module 10 to convert solar energy into electrical energy; a wind turbine is used as the wind energy harvesting module 10 to convert kinetic energy into electrical energy; an infrared energy harvester is used as the infrared energy harvesting module 10 to convert infrared light radiated from the environment or a specific heat source into electrical energy, etc. These are just examples and are not limited to this.

[0056] The energy storage module 20 can be a component with fast charging and discharging, high power density, and energy storage characteristics. Optionally, the energy storage module 20 is a supercapacitor or a rechargeable solid-state battery. This embodiment takes a supercapacitor with a capacity of 10F (farads) as an example. A supercapacitor, also known as an electrochemical container, is a new type of energy storage device that lies between traditional capacitors and chemical batteries. It stores electrical energy through physical or chemical methods, combining the fast charging and discharging characteristics of traditional capacitors with the energy storage capacity of batteries. Furthermore, as the amount of electrical energy in the supercapacitor increases, the real-time voltage across the supercapacitor gradually rises.

[0057] The energy control module 30 can select a controller with an integrated comparator circuit 301. The comparator circuit 301 is used to detect the real-time voltage of the energy storage module 20 and to perform discharge enable control on the energy storage module 20 according to the real-time voltage and the preset first and second preset voltages.

[0058] In some alternative implementations, such as Figure 2 As shown, a battery and / or power module with energy storage function is used as the receiving module for the electrical energy stored in the energy storage module 20. The receiving module is equivalent to the downstream circuit of the energy storage power system.

[0059] In this embodiment, a preset voltage threshold range is used as the discharge condition for the energy storage module 20. The preset voltage range is from a first preset voltage to a second preset voltage, and the first preset voltage is higher than the second preset voltage. That is, after the real-time voltage of the energy storage module 20 reaches the first preset voltage, the energy control module 30 controls it to start discharging and discharge to the second preset voltage. Therefore, the energy control module 30 can enable and discharge the energy storage module 20 according to the real-time voltage and the preset voltage threshold range, thereby enabling the energy storage module 20 to discharge to the receiving module with a more sufficient discharge amount each time compared to the traditional solution.

[0060] In some alternative implementations, such as Figure 3 The energy storage power system shown is an example. In this embodiment, a comparison circuit 301 is provided in the energy control module 30. The input terminal of the comparison circuit 301 is connected to the energy storage module 20 to detect the real-time voltage of the energy storage module 20. The output terminal of the comparison circuit 301 is connected to the control terminal of the first switch 302 between the energy storage module 20 and the receiving module to control the closing and opening of the first switch 302. The first terminal of the first switch 302 is connected to the output terminal of the energy storage module 20, and the second terminal is connected to the input terminal of the receiving module. The first switch 302 is in a normally open state in the initial stage.

[0061] The comparator circuit 301 continuously monitors the real-time voltage of the energy storage module 20 and controls the opening and closing of the first switch 302 based on the real-time voltage. Specifically, when the real-time voltage of the energy storage module 20 reaches a first preset voltage, the comparator circuit 301 generates a first command and sends it to the first switch 302. The first switch 302 closes based on the first command, connecting the output of the energy storage module 20 to the input of the receiving module, and the energy storage module 20 begins to discharge. During the discharge process, the comparator circuit 301 continuously monitors the real-time voltage of the energy storage module 20, and the real-time voltage gradually decreases as the energy storage module 20 discharges until it drops to a second preset voltage. At this point, the comparator circuit 301 generates a second command and sends it to the first switch 302. The first switch 302 opens based on the second command, disconnecting the output of the energy storage module 20 from the input of the receiving module, and the energy storage module 20 stops discharging.

[0062] In some alternative implementations, the comparator circuit 301 is configured as a hysteresis circuit, or as a control circuit consisting of a dual comparator and a microcontroller, the dual comparator being also known as a window comparator.

[0063] Specifically, in one implementation, such as Figure 4a As shown, the hysteresis circuit includes an operational amplifier and several resistors. The operational amplifier includes a non-inverting input "+", an inverting input "-", and an output terminal, used to receive two input signals. The inverting input is connected to the energy storage module 20 and can be used to receive the voltage signal Ui output by the energy storage module 20, which is converted from the discharge voltage of the energy storage module 20 during discharge. The non-inverting input introduces positive feedback through resistors R1 and R2 to form the threshold voltage required for hysteresis. The threshold voltage includes the rising threshold V. h and the falling threshold V l In this circuit, one end of resistor R1 is connected to the non-inverting input terminal "+", and the other end is connected to a reference voltage source to receive the reference voltage. VCC and -VCC are the operating power supplies for the operational amplifier. One end of resistor R2 is connected to the output terminal of the operational amplifier, and the other end is connected to the non-inverting input terminal "+". The output terminal of the operational amplifier is also connected to the first switch 302 to control its opening and closing.

[0064] This embodiment adjusts resistor R1, resistor R2, and reference voltage V. ref Set the rise threshold V of the hysteresis circuit h and the falling threshold V l The rising threshold is set to a first preset voltage, the falling threshold is set to a second preset voltage, and the resistors R1 and R2 are reference voltage V. ref Rising threshold V h With the falling threshold V l The correspondence is shown in the following formula:

[0065]

[0066] Uo represents the output voltage of the hysteresis circuit, which is the comparison result after being compared by the operational amplifier. It is connected to the first switch 302. When the output is high, it controls the first switch 302 to close; when the output is low, it controls the first switch 302 to open.

[0067] In another implementation, such as Figure 4b As shown, another circuit structure of the comparator circuit 301 is presented. This circuit structure consists of dual comparators and a microcontroller. The dual comparators are a first comparator and a second comparator. Each comparator includes a non-inverting input terminal "+", an inverting input terminal "-", and an output terminal.

[0068] The specific connection relationships are as follows: the non-inverting input terminal of the first comparator is connected to the energy storage module 20 and can be used to receive the voltage signal Ui output by the energy storage module 20; the inverting input terminal of the first comparator is connected to a reference voltage source as the upper limit voltage, which is equal to the first preset voltage; the inverting input terminal of the second comparator is connected to the energy storage module 20 and can be used to receive the voltage signal Ui output by the energy storage module 20; the non-inverting input terminal of the second comparator is connected to another reference voltage source as the lower limit voltage, which is equal to the second preset voltage; the output terminals of the first and second comparators are both connected to the input terminals of the microcontroller; the output terminal of the microcontroller is connected to the first switch 302; Uo represents the output signal, which is used to control the first switch 302 to close or open.

[0069] During operation, the first and second comparators simultaneously determine the voltage of the energy storage module 20 based on its real-time voltage. When the first comparator determines that the real-time voltage of the energy storage module 20 exceeds a first preset voltage, the first comparator outputs a high level to the microcontroller, while the second comparator outputs no level. The microcontroller generates a first instruction based on the high level and sends it to the first switch 302, controlling the first switch 302 to close, and the energy storage module 20 begins discharging into the subsequent circuit. When the second comparator determines that the real-time voltage of the energy storage module 20 is lower than a second preset voltage, the second comparator outputs a low level to the microcontroller, while the first comparator outputs no level. The microcontroller generates a second instruction based on the low level and sends it to the first switch 302, controlling the first switch 302 to open, and the energy storage module 20 stops discharging into the subsequent circuit.

[0070] In some optional implementations, taking the deployment of a hysteresis circuit in the energy storage power system as an example, the rise threshold and fall threshold of the hysteresis circuit are determined according to the voltage threshold required for the operation of the subsequent circuit, or, when the subsequent circuit includes a buck-boost converter circuit, they are determined according to the input voltage of the buck-boost converter circuit. Without this hysteresis circuit, this application is no different from the prior art and cannot provide energy efficiently. The rated voltage of the energy storage module 20 is determined according to the threshold voltage of the hysteresis circuit. The rated voltage of the energy storage module 20 is always greater than the rise threshold of the hysteresis circuit, and the rise threshold is always greater than the maximum operating voltage of the receiving module, so that the energy storage module 20 can supply power to the receiving module.

[0071] In some alternative implementations, taking the energy storage power system of a smart door lock as an example, such as... Figure 5 As shown in this embodiment, the energy storage power system charges the battery in the smart door lock and supplies power to the power consumption module, such as the peephole and motor. The maximum charging voltage of the battery is 4.2V, and the minimum supply voltage of the power consumption module is 3V. Therefore, in order to meet the needs of both simultaneously, the rising threshold of the hysteresis circuit is selected as 5V, because 5V is greater than both 4.2V and 3V. The lower limit of the battery charging range determines the falling threshold, for example, 2.5V is selected according to the requirements. This is only an example and is not a limitation.

[0072] When the energy harvesting module 10 converts solar energy into electrical energy and stores it in the energy storage module 20, the voltage of the energy storage module 20 gradually increases. When it reaches 5V, the comparator circuit 301 closes the first switch 302 between the energy storage module 20 and the receiving module. After the energy storage module 20 discharges to 2.5V, the comparator circuit 301 closes the first switch 302, the energy storage module 20 stops supplying power to the subsequent circuits, and restarts the next round of energy storage. Therefore, the amount of discharge corresponding to each discharge from 5V to 2.5V by the energy storage module 20 is relatively fixed.

[0073] For example, in low-light environments, the energy storage module 20 charges slowly. In this case, the first switch 302 is disconnected, and the energy storage module 20 continues to charge slowly until the voltage reaches 5V, at which point the first switch 302 is closed, achieving a one-time discharge. If the light is extremely weak, preventing the voltage of the energy storage module 20 from reaching 5V, the first switch 302 remains open, thus avoiding ineffective charging in low-light conditions. In practical applications, a second switch can be deployed between the energy storage module 20 and the energy harvesting module 10. This allows the second switch to be disconnected during discharge, effectively stopping the energy harvesting module 10 from charging the energy storage module 20, thereby ensuring a more stable discharge rate each time.

[0074] In some optional implementations, if the real-time voltage of the energy storage module 20 during the discharge process is lower than the operating voltage of the receiving module, the energy storage module 20 may stop discharging when it reaches the operating voltage from the first preset voltage, resulting in insufficient discharge. Therefore, as... Figure 6 As shown, in this embodiment of the application, a buck-boost integrated converter circuit 40 is deployed before the receiving module. The input terminal of the buck-boost integrated converter circuit 40 is connected to the second terminal of the first switch 302, the first terminal of the first switch 302 is connected to the output terminal of the energy storage module 20, and the output terminal of the buck-boost integrated converter circuit 40 is connected to the input terminal of the receiving module.

[0075] When the energy storage module 20 discharges, the buck-boost converter circuit 40 boosts or bucks the voltage to convert the output voltage of the energy storage module 20 to a first preset voltage, thereby ensuring that the energy storage module 20 discharges from the first preset voltage to the second preset voltage in one go. Figure 6 As shown, the receiving module includes a battery and a power consumption module. The output terminal of the buck-boost integrated converter circuit 40 is connected to both the input terminal of the battery and the input terminal of the power consumption module. Therefore, during the discharge period, the energy storage module 20 can perform voltage conversion through the buck-boost integrated converter circuit 40 to charge the battery and supply power to the power consumption module. The charging and power supply sequence is determined according to parameters such as the actual working light conditions and the current battery charge. When the energy storage module 20 has not reached the discharge condition, the battery can supply power to the power consumption module.

[0076] In some optional implementations, a protection unit is provided between the output terminal of the buck-boost integrated conversion circuit 40 and the input terminal of the battery in the energy storage power system of this application embodiment. This unit is used to protect the battery when the energy storage module 20 is discharging, prevent the battery from overcharging, solve the problem that when the lithium battery is fully charged for a long time, the internal chemical reaction of the battery will be aggravated, which will lead to easy degradation, and extend the service life of the lithium battery.

[0077] Taking a MOSFET as an example of a protection unit, an energy storage power system is deployed in an electronic device, such as a smart door lock. This electronic device also includes a main control board. The gate (G) of the MOSFET is connected to the controller (MCU) on the main control board, while the source (S) and drain (D) of the MOSFET are connected to the output of the buck-boost converter circuit 40 and the input of the battery, respectively. During operation, the controller obtains the current battery charge and controls the MOSFET accordingly.

[0078] Taking the energy storage power system of a smart door lock as an example, the battery pack is equipped with a charging IC and a battery protection IC. The charging IC receives the 5V voltage from the buck-boost converter 40 and further converts it into a charging voltage suitable for the battery, such as the 4.2V constant voltage charging of a lithium battery, but not limited to this, to achieve constant current / constant voltage (CC / CV) charging logic and protect battery life. During the charging process, the battery protection IC monitors the battery status in real time, including overcharge, over-discharge, overcurrent, and short circuit, and feeds back the current power level to the controller. The controller determines whether the current power level has reached a preset power threshold, such as 80%, but not limited to this.

[0079] If the current battery level is below the preset threshold, a high-level signal is output to the gate of the MOSFET, turning on the source (S) and drain (D) of the MOSFET and allowing energy to flow to the battery. If the current battery level reaches the preset threshold, the controller outputs a low-level signal to the gate, turning off the source (S) and drain (D) of the MOSFET and cutting off the charging circuit. This prevents the battery from being constantly fully charged, which could affect battery health and thus protects the battery. In this embodiment, even after charging the battery stops, the energy storage module 20 can still supply power to the power-consuming module, thereby improving energy utilization.

[0080] Furthermore, common charging ICs are generally only designed for high or low currents. To ensure battery charging even in harsh energy harvesting environments, this embodiment combines an energy storage module 20 with a standard charging IC. The energy storage module 20 boosts the voltage and charges the lithium battery through the charging IC, achieving both low IC board cost and full-condition adaptability. The deployment of the comparator circuit 301 also avoids frequent circuit switching during critical harvesting conditions, such as switching jitter caused by fluctuating sunlight during solar energy harvesting or poor alignment conditions during infrared energy harvesting, thus ensuring stable control of subsequent circuits.

[0081] In some alternative implementations, such as in a solar energy storage system, a photosensitive module is also deployed in the energy storage system. The photosensitive module is connected to the controller in the aforementioned electronic device to detect the current light intensity and adjust the priority of battery charging and power supply of the power module according to the battery's charge level under different light intensities.

[0082] For example, when the light intensity is high, solar energy is converted into electrical energy and stored in the energy storage module 20. If the battery power is low, the battery is charged first, and the excess power supplies the power consumption module. If the power supply is insufficient, the battery supplements the power. If the battery is fully charged, the energy storage module 20 directly supplies power to the device and shuts off the charging of the battery. When the light intensity is low, the energy storage module 20 prioritizes supplying power to the power consumption module. If the power supply is insufficient, the battery supplements the power. If the battery power is low, the battery is charged and then supplies power to the power consumption module. This is just an example and is not a limitation.

[0083] In some alternative implementations, such as Figure 7 As shown, the receiving module includes a battery and a power consumption module. However, the output of the buck-boost converter circuit 40 is connected to the input of the battery, while the input of the power consumption module is connected to another output of the energy storage module 20, and the other output of the battery is connected to the input of the power consumption module. Therefore, during discharge, the energy storage module 20 can directly supply power to the power consumption module, or charge the battery after voltage conversion via the buck-boost converter circuit 40. The charging and power supply sequence is determined based on parameters such as actual working light conditions and the current battery charge level. Furthermore, when the energy storage module 20 has not reached the discharge condition, the battery can supply power to the power consumption module.

[0084] In such Figure 7 The connection method shown can improve the power supply efficiency of the power consumption module. For example, when the voltage of the energy storage module 20 does not reach the first preset voltage, the first switch 302 is in the open state, and the energy storage module 20 no longer charges the battery. However, at this time, both the energy storage module 20 and the battery are connected to the power consumption module and can both serve as the main power supply for the power consumption module.

[0085] Specifically, when the output voltage of the energy storage module 20 is greater than the battery voltage, the energy storage module 20 acts as the main power supply for the power-consuming module, and the battery does not supply power to the power-consuming module. When the voltages of the energy storage module 20 and the battery are the same, both the energy storage module 20 and the battery can act as the main power supply for the power-consuming module. When the output voltage of the energy storage module 20 is less than the battery voltage, the battery acts as the main power supply for the power-consuming module, and the energy storage module 20 does not supply power to the power-consuming module. In actual operation, the voltage of the energy storage module 20 is relatively high in the early stage of discharge, and at this time, the energy storage module 20 acts as the main power supply. As the discharge progresses, the voltage of the energy storage module 20 drops rapidly, while the battery voltage rises after charging. Therefore, in the later stage of discharge, the battery switches to act as the main power supply.

[0086] In some alternative implementations, such as Figure 8 As shown, the battery's output terminal is also connected to the input terminal of the energy storage module 20. When the battery's rated discharge current cannot meet the power demand of the power-consuming module, the battery discharges into the energy storage module 20, and the energy storage module 20 receives the electrical energy transmitted by the battery, thus achieving reverse charging. For example, if the current of the power-consuming module is greater than the battery's rated discharge current for a short period of time, that is, the battery's instantaneous discharge current cannot meet the power demand of the power-consuming module, the battery can charge the supercapacitor through the reverse charging circuit. This allows the supercapacitor to replenish the energy consumed when dealing with a large power-consuming module and provide a large instantaneous current to quickly respond to the power-consuming module's needs.

[0087] The energy storage power system provided in this application collects energy and converts it into electrical energy through an energy harvesting module. The electrical energy is stored in the energy storage module, and the energy control module controls the energy storage module to discharge from a first preset voltage to a second preset voltage according to the real-time voltage of the energy storage module. It can stably supply power to the main body when the energy storage module has sufficient power, making full use of the electrical energy stored in the energy storage module. At the same time, it can establish a three-level energy storage architecture of energy storage module buffer + hysteresis control + wide voltage buck-boost, reducing the frequent charging and discharging losses of the battery due to energy output fluctuations, realizing adaptive energy storage under all working conditions, and flexibly adapting to the needs of diverse power modules, flexibly adjusting charging and power supply methods, and maximizing energy utilization.

[0088] According to an embodiment of this application, an embodiment of a method for operating an energy storage power system is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0089] This embodiment provides a method for operating an energy storage power system, which can be executed by the energy control module 30 in the aforementioned energy storage power system. Figure 9 This is a flowchart of the operation method of the energy storage power system according to an embodiment of this application, such as... Figure 9 As shown, the process includes the following steps:

[0090] Step S901: The energy control module obtains the real-time voltage of the energy storage module.

[0091] Specifically, in the embodiments of this application, such as Figure 3 As shown, the energy harvesting module is connected to the energy storage module. The electrical energy converted by the energy harvesting module is continuously injected into the energy storage module, causing its charge to accumulate continuously. Since the voltage of the energy storage module is linearly related to the amount of charge, its voltage will continue to rise as the amount of stored electrical energy increases.

[0092] Taking solar energy harvesting as an example, the voltage change of the energy storage module is directly affected by the intensity of sunlight. When sunlight is strong, the energy harvesting module has high output power and a large output current, resulting in rapid charge accumulation and a fast voltage rise, reaching a higher voltage level within the same timeframe, such as a rapid increase from 2.5V to 5V. When sunlight is weak, the energy harvesting module has low input power and a small output current, leading to slow charge accumulation and a slower voltage rise, with a lower voltage increase within the same timeframe, such as only a long rise from 2.5V to 3V. During the charging or subsequent discharging process of the energy storage module, a comparator circuit within the energy control module continuously monitors the real-time voltage of the energy storage module.

[0093] In step S902, in response to the real-time voltage reaching the first preset voltage, the energy control module generates a first command and sends it to the first switch so that the first switch closes based on the first command and the energy storage module begins to discharge.

[0094] Specifically, in the embodiments of this application, such as Figure 3 As shown, the comparator circuit acquires the first real-time voltage during the solar charging process of the energy storage module and determines whether the first real-time voltage reaches a first preset voltage, such as 5V. If it does not reach the preset voltage, the first switch between the energy storage module and the buck-boost converter circuit remains open. If it does reach the preset voltage, in response to the first real-time voltage of the energy storage module reaching the first preset voltage during charging, the comparator circuit generates a first command and sends it to the first switch, thereby controlling the first switch to close. The energy storage module then discharges to the receiving module after being regulated by the buck-boost converter circuit.

[0095] In step S903, in response to the real-time voltage dropping to the second preset voltage, the energy control module generates a second command and sends it to the first switch, so that the first switch opens based on the second command and the energy storage module ends the discharge.

[0096] Specifically, in this embodiment, during the discharge process, the real-time voltage of the energy storage module gradually decreases from the first preset voltage. In order to ensure that the energy storage module discharges to the second preset voltage in one go, the output voltage of the energy storage module is converted by the buck-boost integrated conversion circuit, and the output voltage is stabilized at the first preset voltage, so as to output to the subsequent circuit according to the stable first preset voltage.

[0097] After discharge begins, the comparator circuit continuously acquires the second real-time voltage of the energy storage module during the discharge process and determines whether the second real-time voltage is less than the second preset voltage. If it is not less than the second preset voltage, the first switch remains closed, and the energy storage module continues to discharge. If it is less than the second preset voltage, in response to the second real-time voltage of the energy storage module being lower than the second preset voltage, the comparator circuit generates a second command and sends it to the first switch, controlling the first switch to open. The energy storage module then ends its discharge and restarts energy storage, with the corresponding voltage gradually increasing, and this cycle repeats. Therefore, the energy storage module discharges from the first preset voltage to the second preset voltage each time, resulting in a relatively fixed discharge amount each time.

[0098] In some alternative implementations, such as Figure 6 As shown, both the battery and the power module are connected to the output of the buck-boost converter circuit as receiving modules. During the discharge process, it can be configured to charge the battery and supply power to the power module simultaneously; or it can be configured to prioritize charging the battery if the light intensity is high, and prioritize supplying power to the power module if the light intensity is low.

[0099] In some alternative implementations, such as Figure 7As shown, the battery, acting as a receiving module, is connected to the output of the buck-boost converter circuit, while the power consumption module, also acting as a receiving module, is directly connected to the output of the energy storage module. Therefore, regardless of whether the energy storage module is charging the battery, it can directly serve as the power supply for the power consumption module. During discharge, the energy storage module charges the battery through the buck-boost converter circuit, and either the energy storage module supplies power to the power consumption module, or the battery supplies power to the power consumption module. The power supply for the power consumption module is determined by the output voltage of the energy storage module and the battery voltage.

[0100] In some alternative implementations, such as Figure 8 As shown, on the one hand, the energy storage module, as mentioned above, can act as the main power source, supplying power to the battery in the forward direction; on the other hand, it can also act as a "buffer zone" for transient currents, replenishing power to prevent battery overcurrent protection or excessive battery voltage drop. For example, if the current of the power-consuming module exceeds the battery's rated discharge current for a short period, meaning the battery's instantaneous discharge current cannot meet the power demand of the power-consuming module, the battery can charge the supercapacitor through a reverse charging circuit. This allows the supercapacitor to replenish the energy consumed when dealing with a large power-consuming module and provide a large instantaneous current to quickly respond to the power-consuming module's needs. In this case, the selection of the corresponding energy storage module and the second preset voltage are determined by the replenishment current and replenishment time, ensuring that the energy storage module is always energized to meet the replenishment current requirements.

[0101] Taking the energy storage power system of a smart door lock as an example, when there is sunlight, the solar panel charges the supercapacitor based on the battery voltage. At this time, the supercapacitor voltage will be higher than the battery voltage, and the supercapacitor will preferentially discharge directly to the device. When the voltage rises to the rising threshold of the hysteresis circuit, the first switch closes, and the battery is charged through the buck-boost conversion circuit until the supercapacitor voltage drops to the falling threshold of the hysteresis circuit. Then, the first switch opens, and charging stops. At this point, between the supercapacitor and the battery, the one with the higher voltage will preferentially discharge to the power-consuming module.

[0102] In some optional implementations, to avoid overcharging, this application embodiment acquires the current battery level in real time during the battery charging process and determines whether the current battery level has reached a preset battery level threshold. If it has, the protection unit between the buck-boost converter circuit and the battery is turned off when the current battery level reaches the preset battery level threshold.

[0103] like Figure 6 As shown, after the second switch between the battery and the buck-boost converter circuit is turned off, the energy storage module supplies power to the power consumption module through the buck-boost converter circuit. Moreover, the energy storage module is connected in parallel with the battery to the power consumption module after passing through the buck-boost converter circuit, so the battery can also supply power to the power consumption module, depending on the output voltage of the buck-boost converter circuit and the battery voltage.

[0104] like Figure 7 As shown, after turning off the second switch between the battery and the buck-boost converter circuit, the charging of the battery ends. The energy storage module and the battery are connected in parallel to the power consumption module, and both can serve as the main power supply to the power consumption module. The main power supply is determined by the output voltage of the energy storage module and the battery voltage.

[0105] The working method of the energy storage power system provided in this application enables the energy control module to obtain the real-time voltage of the energy storage module. When the real-time voltage reaches a first preset voltage, the first switch is closed, and the energy storage module begins to discharge. When the real-time voltage drops to a second preset voltage, the first switch is opened, and the energy storage module ends its discharge. This method can stably supply power to the main body when the energy storage module has sufficient charge, making full use of the electrical energy stored in the energy storage module. At the same time, it can establish a three-level energy storage architecture of energy storage module buffer + hysteresis control + wide voltage buck-boost, reducing the frequent charging and discharging losses of the battery due to energy output fluctuations, realizing adaptive energy storage under all operating conditions, and flexibly adapting to the needs of diverse power modules, flexibly adjusting charging and power supply methods, and maximizing energy utilization.

[0106] This application also provides an electronic device, such as a smart door lock, a smart doorbell, or a monitoring device, but it is not limited thereto. Figure 10 As shown, the electronic device is equipped with the above-mentioned Figures 2 to 8 The energy storage power system shown is based on the above. Figure 9 The energy storage power system shown operates by supplying power to the power modules of electronic devices.

[0107] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An energy storage power system, characterized in that, The system includes: an energy harvesting module, an energy storage module, and an energy control module; The energy harvesting module is used to collect energy and convert the collected energy into electrical energy; The energy storage module is connected to the energy harvesting module and is used to store the electrical energy; The energy control module is connected to the energy storage module and is used to control the energy storage module to discharge according to the real-time voltage of the energy storage module, so that the real-time voltage of the energy storage module drops from a first preset voltage to a second preset voltage.

2. The energy storage power system according to claim 1, characterized in that, The energy control module includes a comparator circuit and a first switch; The first terminal of the comparator circuit is connected to the energy storage module, the second terminal of the comparator circuit is connected to the first switch, and the first switch is connected to the output terminal of the energy storage module. The comparison circuit is used to detect the real-time voltage of the energy storage module after storing electrical energy, and when the detected real-time voltage reaches the first preset voltage, it controls the first switch to close so that the energy storage module can discharge; until the real-time voltage drops to the second preset voltage after discharge, it controls the first switch to open so that the energy storage module stops discharging.

3. The energy storage power system according to claim 2, characterized in that, The system further includes: a buck-boost integrated converter circuit, the input terminal of which is connected to the output terminal of the energy storage module via the first switch; The buck-boost integrated converter circuit converts the output voltage of the energy storage module to the first preset voltage and outputs it to the subsequent circuit. The first preset voltage is greater than the minimum input voltage of the subsequent circuit.

4. The energy storage power system according to claim 3, characterized in that, The energy storage power system is also connected to a receiving module, which includes a battery and a power consumption module. The input terminal of the battery is connected to the output terminal of the buck-boost converter circuit so that the energy storage module can charge the battery. The power module is connected to the output terminal of the battery, and also to the output terminal of the buck-boost converter circuit or the output terminal of the energy storage module, so that the energy storage module charges the battery and supplies power to the power module.

5. The energy storage power system according to claim 4, characterized in that, A protection unit is provided between the output terminal of the buck-boost converter circuit and the input terminal of the battery. The protection unit is configured to disconnect when the battery charge reaches a preset charge level.

6. The energy storage power system according to claim 4, characterized in that, The output terminal of the battery is also connected to the input terminal of the energy storage module. The energy storage module is also used to receive the electrical energy transmitted by the battery. When the rated discharge current of the battery cannot meet the power demand of the power consumption module, the battery discharges to the energy storage module.

7. A method of operating the energy storage power system according to any one of claims 1-6, characterized in that, The method includes: The energy control module acquires the real-time voltage of the energy storage module; When the real-time voltage reaches a first preset voltage, the energy control module generates a first command and sends it to the first switch, so that the first switch closes based on the first command and the energy storage module begins to discharge. When the real-time voltage drops to a second preset voltage, the energy control module generates a second instruction and sends it to the first switch, so that the first switch opens based on the second instruction and the energy storage module ends its discharge.

8. The method according to claim 7, characterized in that, Also includes: In response to the real-time voltage of the energy storage module dropping from a first preset voltage to a second preset voltage, the output voltage of the energy storage module is converted and output to the subsequent circuit at the first preset voltage.

9. The method according to claim 7, characterized in that, Also includes: When the rated discharge current of the battery in the subsequent circuit cannot meet the power demand of the power consumption module, the energy storage module receives a third instruction from the battery, and the energy of the battery is transferred to the energy storage module, after which the energy storage module supplies power to the power consumption module.

10. An electronic device, characterized in that, Including the energy storage power system as described in any one of claims 1-6.

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