Method for power supply control of a smart device, power supply unit and smart device

Abstract

This disclosure relates to a method, power supply unit, and smart device for power supply control of a smart device. The method includes: controlling the dry cell battery to supply power to the electrical load of the smart device in response to determining that the open-circuit voltage of the dry cell battery is greater than a first voltage threshold; and controlling a combination of the dry cell battery and an energy storage circuit to supply power to the electrical load in response to determining that the open-circuit voltage of the dry cell battery is less than or equal to the first voltage threshold, wherein the first voltage threshold is determined based on the health state of the dry cell battery, and the first voltage threshold is negatively correlated with the health state.

Description

Technical Field

[0001] This disclosure relates to the field of smart devices, and more particularly to a method for power supply control of smart devices, a power supply unit, and a smart device. Background Technology

[0002] With the advancement and development of technology, various smart devices for home and office environments have been widely integrated into users' daily lives. These smart devices include, for example, smart door locks, smart curtains, smart doorbells, and so on.

[0003] Within the aforementioned smart devices, based on differences in operating power consumption and drive current, their functional circuits can generally be divided into two main categories: heavy-load modules and light-load modules. Heavy-load modules typically refer to functional units that require instantaneous high current or continuous high power to operate normally, such as motor drive modules, wireless communication modules, and display drive modules. Light-load modules, on the other hand, typically refer to low-power units that require only a small current to maintain operation, such as microcontroller units (MCUs) and sensor modules.

[0004] While smart devices enhance convenience and intelligence in daily life, they also place higher demands on the stability and reliability of power supply systems. To meet the power supply needs of different application scenarios, smart devices can adopt a combined power supply scheme of dry cell batteries and energy storage circuits. Dry cell batteries, as the basic power supply unit, have advantages such as simple structure, low cost, and easy replacement, making them the mainstream power supply choice for many low-power smart devices. Energy storage circuits are auxiliary power supply circuits capable of storing and rapidly charging / discharging electrical energy. They can work in conjunction with dry cell batteries to improve the load-bearing capacity of the power supply unit formed by the dry cell batteries and energy storage circuits, and extend the lifespan of the dry cell batteries. Common implementations of energy storage circuits include, but are not limited to, combinations of rechargeable lithium batteries, supercapacitors, and other energy storage elements or units with energy storage characteristics.

[0005] In terms of electrical characteristics, the open-circuit voltage of a dry cell battery refers to the voltage between its positive and negative terminals when no load is connected. The load voltage of a dry cell battery refers to the voltage between its positive and negative terminals when a load is connected and current is output. Summary of the Invention

[0006] This disclosure provides a method, power supply unit, and smart device for power supply control. Based on the health status of a dry cell battery, it dynamically determines a voltage threshold for switching power supply modes, distinguishing between power supply using only a dry cell battery and power supply using a combination of a dry cell battery and an energy storage circuit. This allows the power supply mode switching to adapt to the actual health status and load capacity of the dry cell battery. Through this dynamic adjustment mechanism, the device can switch to a combined power supply mode in a timely manner while considering the actual health status and load capacity of the dry cell battery. This effectively improves the stability and reliability of the smart device's power supply system, while ensuring full utilization of the remaining battery power and avoiding premature switching to the combined power supply mode, thereby optimizing overall power supply efficiency and device battery life.

[0007] According to one aspect of this disclosure, a method for power supply control of a smart device is provided. The method may include: controlling the dry cell battery to supply power to the electrical load of the smart device in response to determining that the open-circuit voltage of the dry cell battery is greater than a first voltage threshold; and controlling a combination of the dry cell battery and an energy storage circuit to supply power to the electrical load in response to determining that the open-circuit voltage of the dry cell battery is less than or equal to the first voltage threshold. The first voltage threshold may be determined based on the health state of the dry cell battery, and the first voltage threshold may be negatively correlated with the health state.

[0008] In some embodiments, the first voltage threshold may also be determined based on the temperature of the environment in which the smart device is located.

[0009] In some embodiments, the first voltage threshold can be calculated based on the following formula: Vth1 = Vnominal × Coef × (1 + α × (1 - SOH)). Vth1 represents the first voltage threshold, Vnominal represents the nominal voltage of the dry cell, Coef represents the threshold coefficient that depends on the ambient temperature, α represents the constant compensation coefficient, and SOH represents the health status of the dry cell.

[0010] In some embodiments, controlling the combination of the dry cell battery and the energy storage circuit to supply power to the electrical load in response to determining that the open-circuit voltage of the dry cell battery is less than or equal to a first voltage threshold may include: controlling the dry cell battery and the energy storage circuit to jointly supply power to the electrical load in response to determining that the open-circuit voltage of the dry cell battery is less than or equal to the first voltage threshold and the voltage of the energy storage circuit is greater than a second voltage threshold; and controlling the dry cell battery to supply power to the electrical load in response to determining that the open-circuit voltage of the dry cell battery is less than or equal to the first voltage threshold and the voltage of the energy storage circuit is less than the second voltage threshold. The second voltage threshold may be determined based on a health state, and the second voltage threshold may be negatively correlated with the health state.

[0011] In some embodiments, the second voltage threshold can be calculated based on the following formula: Vth2 = Vini + β×(1- SOH). Vth2 represents the second voltage threshold, Vini represents a preset threshold based on the nominal voltage of the energy storage circuit, β represents a constant compensation coefficient, and SOH represents the health status of the dry cell.

[0012] In some embodiments, the health status can be determined based on the ratio of the initial internal resistance to the current internal resistance of the dry cell.

[0013] In some embodiments, the method may further include: controlling the dry cell to charge the energy storage circuit in response to determining that the open-circuit voltage of the dry cell is less than or equal to a first voltage threshold and the voltage of the energy storage circuit is less than a third voltage threshold. The third voltage threshold may be less than a second voltage threshold.

[0014] In some embodiments, the method may further include: controlling the dry cell battery to stop charging the energy storage circuit in response to a voltage greater than a fourth voltage threshold. The fourth voltage threshold may be greater than a second voltage threshold.

[0015] In some embodiments, the method may further include: controlling the dry cell to charge the energy storage circuit in response to determining that the open-circuit voltage of the dry cell is less than or equal to a fifth voltage threshold and the voltage of the energy storage circuit is less than or equal to a second voltage threshold. The fifth voltage threshold may be less than the first voltage threshold.

[0016] In some embodiments, the smart device may be a smart door lock.

[0017] According to another aspect of this disclosure, a power supply unit for a smart device is provided. The power supply unit may include a dry cell battery, an energy storage circuit, a first switching circuit, a second switching circuit, a third switching circuit, and a controller. The first switching circuit may be connected to the dry cell battery, the electrical load of the smart device, and the controller, respectively, and may be used to, under the control of the controller, to connect or disconnect a first path to allow the dry cell battery to supply power to the electrical load. The second switching circuit may be connected to the dry cell battery, the energy storage circuit, and the controller, respectively, and may be used to, under the control of the controller, to connect or disconnect a second path to allow the dry cell battery to charge the energy storage circuit. The third switching circuit may be connected to the energy storage circuit, the electrical load, and the controller, respectively, and may be used to, under the control of the controller, to connect or disconnect a third path to allow the energy storage circuit to supply power to the electrical load. The controller may be configured to perform the above-described methods.

[0018] According to another aspect of this disclosure, a smart device is provided. The smart device may include an electrical load and the aforementioned power supply unit.

[0019] Based at least on the embodiments of this disclosure, a voltage threshold for switching power supply modes can be dynamically determined based on the health status of the dry cell battery. This distinguishes between power supply using only the dry cell battery and power supply using a combination of the dry cell battery and energy storage circuit, allowing the switching of power supply modes to adapt to the actual health status and load capacity of the dry cell battery. Through this dynamic adjustment mechanism, the system can switch to a combined power supply mode in a timely manner while considering the actual health status and load capacity of the dry cell battery. This effectively improves the stability and reliability of the power supply system for smart devices, while ensuring full utilization of the remaining charge of the dry cell battery and avoiding premature switching to the combined power supply mode, thereby optimizing overall power supply efficiency and device battery life. Attached Figure Description

[0020] The above and other objects, features, and advantages of this disclosure will become more apparent from the more detailed description of embodiments thereof in conjunction with the accompanying drawings. The drawings are provided to offer a further understanding of the embodiments of this disclosure and form part of the specification. The drawings, together with the embodiments of this disclosure, are used to explain this disclosure but do not constitute a limitation thereof. In the drawings, unless explicitly stated otherwise, the same reference numerals denote the same parts, steps, or elements.

[0021] Figure 1 A schematic diagram illustrating an example scenario involved in an embodiment of this disclosure is shown;

[0022] Figure 2 A flowchart of a method for power supply control of a smart device according to an embodiment of the present disclosure is shown;

[0023] Figure 3 An embodiment according to this disclosure is shown. Figure 2 Sub-steps of the method in the middle;

[0024] Figure 4 A schematic diagram of a power supply unit for a smart device according to an embodiment of the present disclosure is shown;

[0025] Figure 5 A schematic diagram of a smart device according to an embodiment of the present disclosure is shown.

[0026] Those skilled in the art will understand that the elements in the accompanying drawings are illustrated for simplicity and clarity and are not necessarily drawn to scale. For example, the dimensions of some elements in the illustrations, block diagrams, or flowcharts may be exaggerated relative to other elements to aid in accurate understanding of this embodiment. Detailed Implementation

[0027] The technical solutions of this disclosure will now be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of, but not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without any creative effort fall within the protection scope of this disclosure.

[0028] In the description of this disclosure, it should be noted that terms such as “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Similarly, words such as “a,” “an,” or “the” do not indicate a quantity limitation but rather indicate the presence of at least one. Words such as “including” or “comprising” mean that the element or object preceding the word encompasses those elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0029] Furthermore, the technical features involved in the different embodiments of this disclosure described below can be combined with each other, as long as there is no conflict between them.

[0030] As mentioned above, smart devices can employ a combined power supply scheme of dry cell batteries and energy storage circuits. Typically, when the dry cell batteries have sufficient charge, they can be used alone to power the load, fully utilizing their power supply advantages. As the battery charge gradually decreases and the power supply capacity weakens, the system switches to a mode where the energy storage circuit and dry cell batteries work together to ensure continuous power supply. Under this control logic, the switching of power supply modes usually relies on a predefined fixed voltage threshold. For example, 80% of the initial open-circuit voltage of the dry cell battery might be set as the switching threshold. When the open-circuit voltage of the dry cell battery is detected to be below this threshold, the power supply mode is triggered to switch from a dry cell battery-only power supply model to a combined power supply model.

[0031] However, the power supply performance of dry cell batteries is related to their state of health. The State of Health (SOH) of a dry cell battery is an indicator of the degree of performance degradation compared to a brand-new dry cell battery of the same model, comprehensively reflecting the battery's energy supply and power output capabilities. This indicator can be quantitatively assessed using parameters such as the battery's remaining charge, on-load / off-load voltage, and internal resistance. As dry cell batteries are used for longer periods, their state of health deteriorates, manifesting as a decrease in charge and off-load voltage, and an increase in internal resistance. This leads to a significant reduction in their load-carrying capacity, causing a noticeable drop in load voltage when driving electrical loads (especially heavy-load modules), making it impossible to maintain stable output. In this situation, using a fixed voltage threshold to distinguish power supply modes will lead to a series of drawbacks: First, the fixed threshold cannot adapt to the characteristic that the load-carrying capacity of dry batteries decreases with the increase of usage time, which may result in a delay in switching timing. That is, the dry battery is already in a state of insufficient load-carrying capacity, but it has not switched to the combined power supply mode in time, which leads to unstable and unreliable power supply, causing abnormal function of the electrical load, restart, or even shutdown. Second, if the fixed threshold is set too high, the combined power supply will be triggered too early when the dry battery still has a certain independent power supply capacity, resulting in frequent charging and discharging of the energy storage circuit, increasing unnecessary energy consumption, and excessively consuming the lifespan of the energy storage circuit, which will reduce the reliability of the entire power supply system and the endurance of the equipment.

[0032] To address at least some of the aforementioned problems, this disclosure provides a method, power supply unit, and smart device for power supply control of a smart device. This method dynamically determines a voltage threshold for switching power supply modes based on the health status of the dry cell battery, distinguishing between power supply using only the dry cell battery and power supply using a combination of dry cell battery and energy storage circuitry. This allows the switching of power supply modes to adapt to the actual health status and load capacity of the dry cell battery. Through this dynamic adjustment mechanism, the device can switch to a combined power supply mode in a timely manner while considering the actual health status and load capacity of the dry cell battery. This effectively improves the stability and reliability of the smart device's power supply system, while ensuring full utilization of the remaining charge of the dry cell battery and avoiding premature switching to the combined power supply mode, thereby optimizing overall power supply efficiency and device battery life.

[0033] The following description uses smart door locks as an example of smart devices. However, those skilled in the art should understand that the technical solutions disclosed herein are not limited to the specific application scenario of smart door locks, but can be widely applied to various smart devices that require improved power supply system stability, reliability and battery life, such as, but not limited to, smart curtains, smart doorbells and so on.

[0034] Figure 1 A schematic diagram of an example scenario 100 involving embodiments of this disclosure is shown. For example... Figure 1As shown, in a smart device such as a smart door lock, a dry cell battery 110 and an energy storage circuit 120 can be provided. Under the control of a controller 140 in the smart device, they can supply power to the electrical load 130 of the smart device, respectively. The power supply of the dry cell battery 110 and the energy storage circuit 120 to the electrical load 130 can be realized via a switching circuit 150. Specifically, the switching circuit 150 can be connected to the dry cell battery 110, the energy storage circuit 120, the electrical load 130, and the controller 140, respectively. According to the control signal from the controller 140, the switching circuit 150 can turn on or off the electrical connection between the dry cell battery 110 and the electrical load 130, the electrical connection between the energy storage circuit 120 and the electrical load 130, and / or the electrical connection between the dry cell battery 110 and the energy storage circuit 120, so as to realize that the dry cell battery 110 supplies power to the electrical load 130, the energy storage circuit 120 supplies power to the electrical load 130, and / or the dry cell battery 110 charges the energy storage circuit 120.

[0035] Dry cell batteries have advantages such as simple structure, low cost, and easy replacement, and can be used as the basic power supply unit for smart devices. They are the mainstream power supply choice for a large number of low-power smart devices.

[0036] The energy storage circuit 120 can be a power supply circuit that realizes energy storage and rapid charging and discharging. It can cooperate with dry cell batteries to improve the load-carrying capacity of the power supply unit formed by the dry cell batteries and the energy storage circuit and extend the service life of the dry cell batteries. Common implementations of the energy storage circuit 120 include, but are not limited to, combinations of rechargeable lithium batteries, supercapacitors, and other energy storage elements or energy storage units with energy storage characteristics.

[0037] The electrical load 130 is an energy-consuming unit and may include one or more heavy-load modules and one or more light-load modules. The heavy-load modules may be, for example, motor drive modules or wireless communication modules of smart devices such as smart door locks; while the light-load modules may be, for example, controllers 140, sensor modules, or fingerprint recognition modules of smart devices such as smart door locks.

[0038] The controller 140 can be implemented by a processor or an MCU. Based on a comparison between the no-load voltage of the dry cell battery 110 and a first voltage threshold, the controller 140 determines the current power supply mode: either a dry cell battery-only power supply mode or a combined power supply mode using the dry cell battery and energy storage circuit. The first voltage threshold can be determined based on the health status of the dry cell battery 110. The health status of the dry cell battery 110 is typically represented by a value between 0 and 1, with a higher value indicating a better health status. The first voltage threshold and the health status of the dry cell battery 110 can be negatively correlated; that is, the better the health status of the dry cell battery 110, the lower the first voltage threshold; conversely, the worse the health status of the dry cell battery 110, the higher the first voltage threshold. Through this dynamic adjustment mechanism, the system can switch to the combined power supply mode in a timely manner, taking into account the actual health status and load capacity of the dry cell battery. This effectively improves the stability and reliability of the power supply system for intelligent devices, while ensuring full utilization of the remaining battery power and avoiding premature switching to the combined power supply mode, thereby optimizing overall power supply efficiency and device battery life.

[0039] The switching circuit 150, under the control of the controller 140, can selectively turn on or off the electrical connection between the dry cell battery 110 and / or the energy storage circuit 120 and the electrical load 130, thereby switching the power supply mode.

[0040] Now for reference Figure 2 . Figure 2 A flowchart of a method 200 for power supply control of a smart device according to an embodiment of the present disclosure is shown. Figure 2 Method 200 in the middle can be derived from Figure 1 The controller 140 in the middle executes. The following is in conjunction with... Figure 1 To describe Figure 2 The method in [the text]. For example... Figure 2 As shown, method 200 may include steps S210 to S220. In step 210, in response to determining that the open-circuit voltage of the dry cell 110 is greater than a first voltage threshold Vth1, the dry cell 110 may be controlled to supply power to the electrical load 130 of the smart device. In this power supply mode, only the dry cell 110 supplies power to the electrical load 130, and the energy storage circuit 120 does not participate in supplying power to the electrical load 130, thereby achieving independent power supply of the dry cell 110. As mentioned above, the open-circuit voltage of the dry cell refers to the terminal voltage between the positive and negative terminals of the dry cell when no load is connected. As the usage time of the dry cell increases, its health condition will deteriorate, manifested in, for example, a decrease in its charge and open-circuit voltage, an increase in internal resistance, resulting in a significant decrease in its load-carrying capacity.

[0041] In step 220, in response to determining that the open-circuit voltage of the dry cell 110 is less than or equal to a first voltage threshold Vth1, the combination of the dry cell 110 and the energy storage circuit 120 can be controlled to supply power to the electrical load 130. In this power supply mode, the dry cell 110 and the energy storage circuit 120 can work together to supply power to the electrical load 130, so as to ensure that the smart device can still be stably and reliably powered when the dry cell's load capacity is insufficient.

[0042] As mentioned above, the health status of the dry cell battery 110 can typically be represented by a value between 0 and 1, with a larger value indicating a better health status. As mentioned above, the health status of the dry cell battery reflects its load-carrying capacity; the closer the value is to 1, the more sufficient the remaining charge, the higher the open-circuit voltage, the lower the internal resistance, and the more stable the output characteristics, thus indicating a stronger load-carrying capacity. The first voltage threshold Vth1 is the threshold for determining the power supply mode switching. In the embodiments of this disclosure, the first voltage threshold Vth1 can be determined based on the health status of the dry cell battery 110, so that the decision to switch the power supply mode is made considering the actual health status of the dry cell battery 110 (and therefore its actual load-carrying capacity). The first voltage threshold Vth1 and the health status of the dry cell battery 110 can be negatively correlated; that is, the better the health status of the dry cell battery 110, the smaller the first voltage threshold Vth1; the worse the health status of the dry cell battery 110, the larger the first voltage threshold Vth1. Through this setting, the first voltage threshold Vth1 can be dynamically adjusted according to the actual health status and load-carrying capacity of the dry cell battery 110, thereby achieving adaptive switching of the power supply mode. On the one hand, when the dry cell battery 110 is in good health, the first voltage threshold Vth1 is relatively small, allowing it to maintain a standalone power supply mode without prematurely switching to a combined power supply mode. This ensures full utilization of the remaining charge in the dry cell battery 110, improving its energy efficiency. Simultaneously, it reduces unnecessary charging and discharging operations in the energy storage circuit 120, preventing additional losses due to frequent switching and extending its lifespan. This optimizes overall power supply efficiency and device endurance. On the other hand, when the dry cell battery 110 is in poor health, the first voltage threshold Vth1 is relatively large, allowing for timely switching to a combined power supply mode. The energy storage circuit 120 supplements the insufficient load-carrying capacity of the dry cell battery 110, preventing voltage drops, power outages, or device malfunctions due to decreased battery power supply capacity. This effectively improves the stability and reliability of the smart device's power supply system.

[0043] The state of health (SOH) of the dry cell 110 can be determined based on various known methods. In some embodiments, the SOH of the dry cell 110 can be based on the initial internal resistance R of the dry cell 110. initial With the current internal resistance R currnt The ratio is used to determine this, i.e., SOH = R initial / R currnt By using the initial internal resistance R initial With the current internal resistance R currnt Ratio calculations can quantify the degree of aging and degradation of dry cell batteries. When a dry cell battery is relatively new and in good health, its current internal resistance R... currnt With initial internal resistance R initial When the SOH value approaches 1, the current internal resistance R approaches 1 when the dry cell battery is severely aged and low in power. currnt A significant increase in resistance corresponds to a decrease in the State of Health (SOH) value. The current internal resistance of the dry cell battery can be measured periodically (e.g., every 24 hours). Determining the SOH health status using the internal resistance ratio method requires less computation and can quickly and stably obtain the battery's health status during the operation of smart devices, providing an accurate and reliable basis for the dynamic switching of subsequent power supply modes.

[0044] The initial internal resistance R here initial Internal resistance (R) refers to the internal resistance of a dry cell battery 110 in its brand-new, unused, or factory-shipped condition. It can be obtained through factory testing or pre-calibration and serves as a benchmark parameter for measuring the degree of aging of the dry cell battery. As the usage time, power consumption, and aging of the dry cell battery increase, its internal resistance typically increases gradually. The current internal resistance R of the dry cell battery 110 can be determined using various known methods. current For example, the controller 140 can control the switching circuit 150 to enable the dry cell battery 110 to power a test load with a known resistance value for a short period of time, and collect the open-circuit voltage U0 of the dry cell battery 110 in an unloaded state (or near-unloaded state) and the loaded voltage U after the test load is connected. L The current internal resistance R of the dry cell battery current Through R current =(U0 – U L ) / I L To calculate, where I L This refers to the test current flowing through the test load. By completing loading, sampling, and calculation in a very short time, the current internal resistance of the dry cell battery can be accurately and in real time obtained without affecting the normal operation of the smart device or significantly consuming the battery power, thus reliably determining the battery's state of health (SOH).

[0045] Ambient temperature also significantly affects the output characteristics and load-carrying capacity of the dry cell battery 110. In low-temperature environments, the electrochemical characteristics of the dry cell battery 110 are suppressed, its output voltage is prone to drop, and its load-carrying capacity decreases significantly. However, within a suitable temperature range, the dry cell battery 110 can maintain relatively stable discharge performance. Therefore, in some embodiments, the first voltage threshold Vth1 can be further determined based on the temperature of the environment in which the smart device is located. For example, in low-temperature environments, the first voltage threshold Vth1 can be adaptively increased, allowing for early switching to the combined power supply mode when the dry cell battery's open-circuit voltage is relatively high. This compensates for the insufficient load-carrying capacity of the dry cell battery with the help of the energy storage circuit 120, preventing power supply anomalies due to low temperatures. In normal or high-temperature environments, the first voltage threshold Vth1 can be correspondingly reduced to fully utilize the remaining charge of the dry cell battery 110, reduce unnecessary mode switching, and further optimize power supply efficiency and device battery life. Temperature sensors can be installed inside or outside the smart device's casing to collect the temperature of the environment in which the smart device is located in real time or periodically. By introducing a temperature compensation mechanism, the setting of the first voltage threshold Vth1 can be made more closely match the actual discharge capacity of dry batteries under different temperature conditions, thereby improving the environmental adaptability and robustness of the power supply control strategy and ensuring that smart devices can work stably and reliably under complex temperature conditions.

[0046] In some embodiments, the first voltage threshold Vth1 can be calculated based on the following formula:

[0047] Vth1 = Vnominal×Coef×(1 +α×(1 - SOH))

[0048] Where Vth1 represents the first voltage threshold, Vnominal represents the nominal voltage of the dry cell, Coef represents the threshold coefficient that depends on the temperature of the environment in which the dry cell is located, α represents the constant compensation coefficient, and SOH represents the health status of the dry cell.

[0049] Coef can be obtained, for example, based on an experimentally determined temperature-coefficient mapping relationship. For instance, when the ambient temperature T < 10℃, Coef can be set to 0.9; when the ambient temperature 10℃ ≤ T ≤ 45℃, Coef can be set to 0.8.

[0050] The constant compensation coefficient α can be used to adjust the influence of the state of health (SOH) on the first voltage threshold. It can be set through experiments or simulations according to the application scenario and system requirements. For example, α can be set to 0.3.

[0051] As can be seen from the above formula, when the dry cell battery's state of health (SOH) is good, (1 - SOH) approaches 0, and the first voltage threshold Vth1 is relatively small. This allows the dry cell battery to maintain its independent power supply mode even under low open-circuit voltage, fully utilizing its remaining charge. As the dry cell battery's SOH deteriorates, (1 - SOH) increases, causing the first voltage threshold Vth1 to rise accordingly. This allows for earlier switching to the combined power supply mode, ensuring power supply reliability. Furthermore, by introducing a temperature-related threshold coefficient (Coef), the first voltage threshold can be adjusted and compensated for under harsh conditions such as low temperatures. This makes the power supply switching strategy more closely match the actual load capacity of the dry cell battery, improving the stability, robustness, and endurance of the entire power supply system in complex environments.

[0052] It is understandable that although steps S210 and S220 are shown as being executed sequentially, they are not actually executed in strict order as shown in the figure. Instead, they can be executed one at a time or in a loop, depending on the comparison between the open voltage of the dry cell 110 and the first voltage threshold Vth1.

[0053] Figure 3 An embodiment according to this disclosure is shown. Figure 2 The sub-steps of step S220 shown. For example... Figure 3 As shown, step S220 may include sub-steps S221 and S222 to combine the voltage state of the energy storage circuit 120 to achieve more refined power supply control.

[0054] In sub-step S221, in response to determining that the open-circuit voltage of the dry cell 110 is less than or equal to the first voltage threshold Vth1 and the voltage of the energy storage circuit 120 is greater than the second voltage threshold Vth2, the dry cell and the energy storage circuit can be controlled to jointly supply power to the electrical load. The second voltage threshold Vth2 can be used as the start-up threshold for the energy storage circuit 120 to supply power to the external environment, ensuring that the energy storage circuit 120 has a stable power supply capability before supplying power to the electrical load 130 together with the dry cell 110. By setting the second voltage threshold Vth2, it can be ensured that the energy storage circuit 120 can play its role in energy storage and replenishment, thereby coordinating with the dry cell 110 to respond to the power demand of the electrical load (especially the heavy-load module), ensuring the stable and reliable operation of the smart device, while also taking into account the power supply safety of the energy storage circuit 120.

[0055] In sub-step S222, in response to determining that the open-circuit voltage of the dry cell 110 is less than or equal to the first voltage threshold Vth1 and the voltage of the energy storage circuit is less than the second voltage threshold Vth2, the dry cell can be controlled to supply power to the electrical load. As mentioned above, the second voltage threshold Vth2 can be used as the start-up threshold for the energy storage circuit 120 to supply power to the outside. If the voltage of the energy storage circuit is less than the second voltage threshold Vth2, it indicates that the current voltage of the energy storage circuit 120 is low (insufficient power) and does not meet the conditions for effective auxiliary power supply. At this time, the energy stored in the energy storage circuit 120 itself is insufficient. If it is forcibly controlled to participate in power supply, it will not only fail to compensate for the insufficient load-carrying capacity of the dry cell 110, but may also cause the electrical load to work abnormally due to the reverse pull-down of the supply voltage by the energy storage circuit 120, and may even damage the energy storage elements (such as capacitors, supercapacitors, etc.) inside the energy storage circuit 120, causing circuit failure. Based on this, when the voltage of the energy storage circuit is less than the second voltage threshold Vth2, the controller 140 will select to supply power to the electrical load 130 only from the dry cell battery 110, causing the energy storage circuit 120 to exit the power supply circuit, avoiding ineffective power supply or reverse impact. Although the open-circuit voltage of the dry cell battery 110 is less than or equal to the first voltage threshold Vth1 (insufficient power), it still has basic power supply capability, which can meet the power demand of the electrical load 130 under low-power conditions (such as device standby, low-power operation, etc.), ensuring that the smart device will not stop working due to power interruption. It can be understood that, under normal circumstances, the smart device will use the dry cell battery 110 to charge the energy storage circuit 120 during sleep to keep the energy storage circuit 120 in a high-charge state. Therefore, under the condition that the dry cell battery 110 is performing normally and the sleep cycle is reasonable, the probability of "the open-circuit voltage of the dry cell battery 110 being less than or equal to the first voltage threshold Vth1" and "the voltage of the energy storage circuit 120 being less than the second voltage threshold Vth2" occurring simultaneously is low. However, when the dry cell battery 110 is nearing the end of its life, the device has been idle for a long time, or is in an extreme low temperature environment, the above-mentioned dual low voltage state may still occur. At this time, specific low power protection or alarm strategies can be implemented.

[0056] In embodiments of this disclosure, the second voltage threshold Vth2 can be determined based on the health state of the dry cell battery, and the second voltage threshold Vth2 can be negatively correlated with the health state. The health state of the dry cell battery 110 can be determined based on various known methods or the method described above based on the internal resistance of the dry cell battery. The better the health state of the dry cell battery 110, the smaller the second voltage threshold Vth2; the worse the health state of the dry cell battery 110, the larger the second voltage threshold Vth2. With this setting, the load-carrying capacity differences of the dry cell battery 110 under different health states can be adapted, ensuring that the auxiliary power supply function of the energy storage circuit 120 can flexibly adapt to the changing load-carrying capacity of the dry cell battery 110, thereby improving the stability and reliability of the entire power supply system. Specifically, when the dry cell battery 110 is in good health, its internal resistance is low, and it still has strong discharge capacity and energy reserves, resulting in a strong load-carrying capacity. At this time, the auxiliary power supply function of the energy storage circuit 120 is not demanding, and the start-up threshold Vth2 for the energy storage circuit 120 to supply power can be set to a low value, allowing the energy storage circuit 120 to participate in power supply even if its energy level is not very high. When the dry cell battery 110 is in poor health, its internal resistance is high, and its load-carrying capacity decreases. At this time, the auxiliary power supply function of the energy storage circuit 120 is demanding, and the start-up threshold Vth2 for the energy storage circuit 120 to supply power can be set to a higher value, allowing the energy storage circuit 120 to participate in power supply only when it has sufficient capacity to share the power supply needs of the electrical load 130, thereby improving the stability and reliability of the power supply system.

[0057] The above-mentioned method of dynamically adjusting the second voltage threshold Vth2 based on the health status of the dry cell battery can not only make full use of the dry cell battery power, but also ensure that the energy storage circuit can reliably intervene at the appropriate time, effectively improving the stability, adaptability and overall reliability of the power supply system.

[0058] It is understood that although sub-steps S221 and S222 are shown to be executed sequentially, they are not actually executed in strict order as shown in the figure. Instead, they can be executed one at a time or in a loop, depending on the comparison results of the open voltage of the dry cell 110 with the first voltage threshold Vth1 and the voltage of the energy storage circuit 120 with the second voltage threshold Vth2.

[0059] In some embodiments, the second voltage threshold Vth2 can be calculated based on the following formula:

[0060] Vth2 = Vini + β×(1 - SOH)

[0061] Wherein, Vth2 represents the second voltage threshold, Vini represents the preset threshold based on the nominal voltage of the energy storage circuit 120, β represents the constant compensation coefficient, and SOH represents the health status of the dry cell 110.

[0062] Vini can be preset according to the nominal voltage of the energy storage circuit 120 to ensure that the energy storage circuit 120 starts supplying power within a safe and effective voltage range, meeting the auxiliary power supply needs of the electrical load 130. For example, Vini can be set to be equal to 90% of the nominal voltage of the energy storage circuit 120, etc.

[0063] The constant compensation coefficient β is used to adjust the magnitude and sensitivity of the change in the second voltage threshold Vth2 with the health state of the dry cell. It can be set through experiments or simulations according to the application scenario and system requirements. For example, β can be set to 0.2.

[0064] As mentioned above, SOH represents the health status of the dry cell battery 110, and its value typically ranges from 0 to 1. The better the health status of the dry cell battery 110, the closer SOH is to 1, the smaller (1-SOH) is, and the smaller the calculated second voltage threshold Vth2 is. Conversely, the worse the health status of the dry cell battery 110, the closer SOH is to 0, the larger (1-SOH) is, and the larger the calculated second voltage threshold Vth2 is. This results in a negative correlation between the second voltage threshold Vth2 and the health status of the dry cell battery 110. Through the above formula, the second voltage threshold Vth2 can be dynamically adjusted according to the health status of the dry cell battery, ensuring both full utilization of the battery's power and reliable intervention of the energy storage circuit at appropriate times, thereby improving the stability, adaptability, and overall reliability of the power supply system.

[0065] Return to reference Figure 2 As described above, the dry cell battery 110 can also charge the energy storage circuit 120, allowing the energy storage circuit 120 to replenish its power in a timely manner. This enables the dry cell battery 110 to provide auxiliary power to the electrical load 130 when its load-carrying capacity is insufficient, maintaining the continuous and stable operation of the smart device. Therefore, as... Figure 2As shown, method 200 may further include step S230. In step S230, in response to determining that the open-circuit voltage of the dry cell 110 is less than or equal to a first voltage threshold Vth1 and the voltage of the energy storage circuit is less than a third voltage threshold Vth3, the dry cell 110 can be controlled to charge the energy storage circuit 120. Here, charging of the energy storage circuit 120 only begins when the open-circuit voltage of the dry cell 110 is less than or equal to the first voltage threshold Vth1. This prioritizes the supply of power from the dry cell 110 to the electrical load 130, avoiding frequent charging of the energy storage circuit 120 when the dry cell 110 is in good condition, has sufficient charge, and has a strong load-carrying capacity, thus reducing unnecessary energy consumption and charge / discharge losses. Furthermore, the third voltage threshold Vth3 may be less than the second voltage threshold Vth2. That is, the dry cell 110 only begins to charge the energy storage circuit 120 when the voltage of the energy storage circuit 120 drops to a level lower than the activation threshold Vth2 for the energy storage circuit 120 to supply power to the outside. The advantage of this approach is that it avoids the energy storage circuit 120 being charged immediately after completing auxiliary power supply, ensuring that the energy storage circuit has a reasonable voltage hysteresis range after the auxiliary power supply is engaged (i.e., achieving hysteresis control). This not only prevents the jitter caused by frequent switching between charging and power supply logic, but also ensures that charging is only started when the voltage of the energy storage circuit is truly low, improving the stability and rationality of charging control. At the same time, it reserves sufficient voltage margin for auxiliary power supply when the load capacity of the dry battery is insufficient.

[0066] In some embodiments, the timing of stopping charging can also be set. For example... Figure 2 As further shown, method 200 may also include step S240. In step S240, in response to the voltage of the energy storage circuit being greater than a fourth voltage threshold Vth4, the dry cell battery 110 may be controlled to stop charging the energy storage circuit 120. The fourth voltage threshold Vth4 is a charging stop threshold and may be greater than the aforementioned second voltage threshold Vth2. For example, the fourth voltage threshold Vth4 may be set to the second voltage threshold Vth2 plus a predetermined value, or set to the product of the second voltage threshold Vth2 and a predetermined scaling factor. That is, the dry cell battery 110 may charge the energy storage circuit 120 to a voltage higher than the start-up threshold Vth2 for the energy storage circuit 120 to supply power externally. By doing so, sufficient voltage margin and power supply capacity can be reserved for the energy storage circuit 120, ensuring that when the load-carrying capacity of the dry cell battery 110 decreases or the voltage drops, the energy storage circuit 120 can stably and reliably provide auxiliary power to meet the instantaneous power demand of the electrical load 130. In addition, setting the charging stop threshold Vth4 higher than the discharging (i.e., power supply to the outside) start threshold Vth2 can further expand the voltage hysteresis range, avoid frequent switching between charging and discharging states of the energy storage circuit, reduce control jitter and switching losses, and improve the overall stability and reliability of the power supply system.

[0067] As usage time increases, the health of the dry cell battery 110 gradually deteriorates, its internal resistance gradually increases, and its load-carrying capacity and power supply capacity continuously decrease. Consequently, both its load voltage and open-circuit voltage decrease, and the charging speed and efficiency of the energy storage circuit 120 also deteriorate. In this situation, if the charging is still initiated under the original charging conditions, the energy storage circuit 120 may experience problems such as untimely replenishment of power and low voltage, making it difficult to meet the auxiliary power supply needs of the electrical load. Therefore, it is necessary to adaptively increase the frequency of the dry cell battery 110's charging of the energy storage circuit 120, triggering the charging action in advance to ensure that the energy storage circuit 120 can maintain sufficient power and reliable power supply capacity. Therefore, instead of waiting for the voltage of the energy storage circuit 120 to drop to the third voltage threshold Vth3 mentioned in step S230, the charging of the energy storage circuit 120 by the dry cell battery 110 can be initiated when the voltage of the energy storage circuit 120 is greater than the third voltage threshold Vth3, for example, when the voltage of the energy storage circuit 120 is less than or equal to the second voltage threshold Vth2 (as mentioned above, Vth2 is greater than Vth3), thereby achieving earlier and more timely power replenishment. Thus, in some embodiments, such as... Figure 2 As shown, method 200 may further include step S250. In step S250, in response to determining that the open-circuit voltage of the dry cell 110 is less than or equal to a fifth voltage threshold Vth5 and the voltage of the energy storage circuit 120 is less than or equal to a second voltage threshold Vth2, the dry cell 110 can be controlled to charge the energy storage circuit 120. Here, the fifth voltage threshold Vth5 may be less than the aforementioned first voltage threshold Vth1 to adapt to working scenarios where the dry cell 110 is in worse health and has weaker power supply capabilities. Through this hierarchical and adaptive charging control strategy, the energy storage circuit 120 can be kept sufficiently charged as much as possible throughout the entire life cycle of the dry cell 110, thereby improving the stability and reliability of the overall power supply system.

[0068] It is understood that the above steps are not strictly performed in the order shown in the diagram. For example, although step S230 is shown after step S220, step S220 is not a necessary prerequisite for the execution of step S230. Similarly, step S240 is not a necessary prerequisite for the execution of step S250.

[0069] As described above, in some embodiments, the smart device mentioned above may be a smart door lock.

[0070] The power supply control method 200 for smart devices according to embodiments of this disclosure can dynamically determine the voltage threshold for switching power supply modes based on the health status of the dry cell battery. This distinguishes between power supply using only the dry cell battery and power supply using a combination of the dry cell battery and an energy storage circuit, allowing the switching of power supply modes to adapt to the actual health status and load capacity of the dry cell battery. Through this dynamic adjustment mechanism, the system can switch to a combined power supply mode in a timely manner while considering the actual health status and load capacity of the dry cell battery. This effectively improves the stability and reliability of the power supply system for smart devices, while ensuring full utilization of the remaining charge of the dry cell battery and avoiding premature switching to the combined power supply mode, thereby optimizing overall power supply efficiency and device battery life.

[0071] Embodiments of this disclosure also provide a power supply unit for a smart device. Figure 4 A schematic diagram of a power supply unit 400 for a smart device according to an embodiment of the present disclosure is shown. Figure 4 As shown, the power supply unit 400 may include a dry cell battery 410, an energy storage circuit 420, a first switching circuit 430, a second switching circuit 440, a third switching circuit 450, and a controller 460. The dry cell battery 410 and the energy storage circuit 420 functionally correspond to the components described above. Figure 1 The dry cell battery 110 and energy storage circuit 120 described herein will not be repeated here.

[0072] like Figure 4 As shown, the first switching circuit 430 can be connected to the dry cell battery 410, the electrical load 130 of the smart device, and the controller 460, respectively. Under the control of the controller 460, the first switching circuit 430 can turn on or off the first path to allow the dry cell battery 410 to supply power to the electrical load 130. The second switching circuit 440 can be connected to the dry cell battery 410, the energy storage circuit 420, and the controller 460, respectively. Under the control of the controller 460, the second switching circuit 440 can turn on or off the second path to allow the dry cell battery 410 to charge the energy storage circuit 420. The third switching circuit 450 can be connected to the energy storage circuit 420, the electrical load 130, and the controller 460, respectively. Under the control of the controller 460, the third switching circuit 450 can turn on or off the third path to allow the energy storage circuit 420 to supply power to the electrical load 130. The controller 460 functionally corresponds to the above-mentioned reference. Figure 1 The controller 140 described above can perform the functions described in the reference above. Figures 2 to 3 A method 200 for power supply control of smart devices is described.

[0073] According to embodiments of this disclosure, the power supply unit 400 for smart devices can dynamically determine the voltage threshold for switching power supply modes based on the health status of the dry cell battery. This distinguishes between power supply using only the dry cell battery and power supply using a combination of the dry cell battery and an energy storage circuit, allowing the power supply mode switching to adapt to the actual health status and load capacity of the dry cell battery. Through this dynamic adjustment mechanism, the system can switch to a combined power supply mode in a timely manner while considering the actual health status and load capacity of the dry cell battery. This effectively improves the stability and reliability of the power supply system for smart devices, while ensuring full utilization of the remaining battery power and avoiding premature switching to the combined power supply mode, thereby optimizing overall power supply efficiency and device battery life.

[0074] Embodiments of this disclosure also provide a smart device. Figure 5 A schematic diagram of a smart device 500 according to an embodiment of the present disclosure is shown. (As shown) Figure 5 As shown, the smart device 500 may include an electrical load 130 and the above-mentioned reference. Figure 4 The power supply unit 400 is described. The power supply unit 400 can provide a stable and reliable power supply to the electrical load 130.

[0075] According to embodiments of this disclosure, the smart device 500 can dynamically determine a voltage threshold for switching power supply modes based on the health status of the dry cell battery. This distinguishes between power supply using only the dry cell battery and power supply using a combination of the dry cell battery and an energy storage circuit, allowing the power supply mode switching to adapt to the actual health status and load capacity of the dry cell battery. Through this dynamic adjustment mechanism, the device can switch to a combined power supply mode in a timely manner while considering the actual health status and load capacity of the dry cell battery. This effectively improves the stability and reliability of the smart device's power supply system, while ensuring full utilization of the remaining battery power and avoiding premature switching to the combined power supply mode, thereby optimizing overall power supply efficiency and device battery life.

[0076] Unless otherwise stated, an element mentioned in the singular is not intended to mean "one and only one," but rather "one or more." Similarly, a plural reference to an element does not mean "more than one," but rather "one or more," unless otherwise stated or contradicting description elsewhere. Terms such as "if," "when," and "although" should be interpreted as "under the condition of," rather than implying an immediate temporal relationship or response. That is, these phrases, such as "when," do not imply an immediate action in response to an action occurring or during an action, but merely imply that an action will occur if the condition is met, but does not require a specific or immediate time constraint for the action to occur. Combinations, such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof," include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Combinations such as “at least one of A, B or C”, “one or more of A, B or C”, “at least one of A, B and C”, “one or more of A, B and C” and “A, B, C or any combination thereof” can be only A, only B, only C, A and B, A and C, B and C or A, B and C, wherein any such combination may contain one or more members of A, B or C.

[0077] It should be noted that the flowcharts and block diagrams in the accompanying drawings illustrate the possible structures, functions, and operations of the methods and apparatus according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, a program segment, or a portion of code containing at least one executable instruction for implementing a specified logical function. It should also be noted that in some alternative embodiments, the functions described in a block may occur in a different order than those described in the accompanying drawings. For example, two blocks shown consecutively may actually be executed in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware system that performs the specified function or operation, or by a combination of dedicated hardware and computer instructions.

[0078] The various embodiments described in this disclosure are for illustrative purposes and are not intended to be exhaustive or limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope of the described embodiments. The terminology used herein is chosen to best explain the principles of the embodiments, their practical application, or improvements to techniques found in the market, or to enable those skilled in the art to understand the embodiments disclosed herein.

[0079] Throughout the description and claims of this specification, the word “comprising” and variations thereof, such as “comprising” and “including,” means “including, but not limited to,” and are not intended to exclude, for example, other additives, components, integers, or steps. “Exemplary” means “an example of a preferred or ideal implementation and is not intended to convey its indication.” “Like” is not used in a limiting sense but for interpretative purposes.

[0080] As used in this disclosure, the term "determine" can include a variety of operations. For example, "determine," calculation, operation, processing, derivation, investigation, search (e.g., searching in a table, database, or other data structure), and ascertainment are all considered "determine." Additionally, "determine" also refers to receiving (e.g., receiving information), sending (e.g., sending information), inputting, outputting, and accessing (e.g., accessing data in memory). Furthermore, "determine" can also refer to parsing, selecting, picking, opening, and comparing. In other words, several actions can be considered "determine."

[0081] As used in this disclosure, terms such as “connection,” “coupling,” or any variations thereof refer to any direct or indirect connection or combination between two or more units, which may include situations where one or more intermediate units exist between two units that are “connected” or “coupled” to each other. The coupling or connection between units may be physical or logical, or a combination of both. As used in this disclosure, two units may be considered electrically connected by means of one or more wires, cables, and / or printing, and as numerous non-limiting and non-exhaustive examples, may be “connected” or “coupled” to each other by means of electromagnetic energy in the radio frequency region, microwave region, and / or light (visible and invisible) region, etc.

[0082] The present disclosure has been described in detail above; however, it will be apparent to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure may be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims.

Claims

1. A method for power supply control of a smart device, comprising: In response to determining that the open-circuit voltage of the dry cell is greater than a first voltage threshold, the dry cell is controlled to supply power to the electrical load of the smart device; as well as In response to determining that the open-circuit voltage of the dry cell is less than or equal to the first voltage threshold, the combination of the dry cell and the energy storage circuit is controlled to supply power to the electrical load. The first voltage threshold is determined based on the health status of the dry cell, and the first voltage threshold is negatively correlated with the health status.

2. The method according to claim 1, wherein, The first voltage threshold is also determined based on the temperature of the environment in which the smart device is located.

3. The method according to claim 2, wherein, The first voltage threshold is calculated based on the following formula: Vth1 = Vnominal×Coef×(1 +α×(1 - SOH)) Wherein, Vth1 represents the first voltage threshold, Vnominal represents the nominal voltage of the dry cell, Coef represents the threshold coefficient depending on the ambient temperature, α represents the constant compensation coefficient, and SOH represents the health status of the dry cell.

4. The method according to claim 1, wherein, In response to determining that the open-circuit voltage of the dry cell is less than or equal to the first voltage threshold, controlling the combination of the dry cell and the energy storage circuit to supply power to the electrical load includes: In response to determining that the open-circuit voltage of the dry cell is less than or equal to a first voltage threshold and the voltage of the energy storage circuit is greater than a second voltage threshold, the dry cell and the energy storage circuit are controlled to jointly supply power to the electrical load; and In response to determining that the open-circuit voltage of the dry cell is less than or equal to a first voltage threshold and the voltage of the energy storage circuit is less than a second voltage threshold, the dry cell is controlled to supply power to the electrical load. The second voltage threshold is determined based on the health status, and the second voltage threshold is negatively correlated with the health status.

5. The method according to claim 4, wherein, The second voltage threshold is calculated based on the following formula: Vth2 = Vini + β×(1 - SOH) Wherein, Vth2 represents the second voltage threshold, Vini represents a preset threshold based on the nominal voltage of the energy storage circuit, β represents a constant compensation coefficient, and SOH represents the health status of the dry cell.

6. The method according to claim 1, wherein, The health status is determined based on the ratio of the initial internal resistance to the current internal resistance of the dry cell.

7. The method according to claim 4, further comprising: In response to determining that the open-circuit voltage of the dry cell is less than or equal to a first voltage threshold and the voltage of the energy storage circuit is less than a third voltage threshold, the dry cell is controlled to charge the energy storage circuit. The third voltage threshold is less than the second voltage threshold.

8. The method according to claim 7, further comprising: In response to the voltage of the energy storage circuit exceeding a fourth voltage threshold, the dry cell battery is controlled to stop charging the energy storage circuit. The fourth voltage threshold is greater than the second voltage threshold.

9. The method according to claim 4, further comprising: In response to determining that the open-circuit voltage of the dry cell is less than or equal to a fifth voltage threshold and the voltage of the energy storage circuit is less than or equal to a second voltage threshold, the dry cell is controlled to charge the energy storage circuit. The fifth voltage threshold is less than the first voltage threshold.

10. The method according to claim 1, wherein, The smart device is a smart door lock.

11. A power supply unit for a smart device, comprising a dry cell battery, an energy storage circuit, a first switching circuit, a second switching circuit, a third switching circuit, and a controller, wherein... The first switching circuit is connected to the dry cell battery, the electrical load of the smart device, and the controller, respectively, and is used to turn on or off the first path under the control of the controller so that the dry cell battery supplies power to the electrical load; The second switching circuit is connected to the dry cell battery, the energy storage circuit, and the controller, respectively, and is used to turn on or off the second path under the control of the controller so that the dry cell battery charges the energy storage circuit; The third switching circuit is connected to the energy storage circuit, the electrical load, and the controller, respectively, and is used, under the control of the controller, to turn the third path on or off so that the energy storage circuit supplies power to the electrical load; and The controller is configured to perform the method according to any one of claims 1-10.

12. A smart device comprising an electrical load and a power supply unit according to claim 11.

Images