High-efficiency power supply circuit system and control method thereof

Abstract

The invention relates to the technical field of intelligent meter power supplies, in particular to a high-efficiency power supply circuit system and a control method thereof. The system comprises a main power supply, a main power supply control circuit, a current-limiting and voltage-limiting circuit, a high-capacity energy storage device, a voltage conversion module and an energy storage device electric quantity detection module, the main power supply is connected with the main power supply control circuit, and the main power supply control circuit is connected with the input end of the current-limiting and voltage-limiting circuit; the output end of the current-limiting voltage-limiting circuit is connected with the input end of the high-capacity energy storage device, the output end of the high-capacity energy storage device is connected with the input end of the voltage conversion module, and the output end of the voltage conversion module is connected with the high-power-consumption circuit. The voltage conversion module is used for adjusting the voltage output by the high-capacity energy storage device so as to stably output the voltage required by the high-power-consumption circuit, and the energy storage device electric quantity detection module is connected with the high-capacity energy storage device. The technical problem of large-current discharge of the battery caused by the ESR of the energy storage device is avoided, the service life of the battery is prolonged, and the utilization efficiency of the battery is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of smart meter power supply, and in particular to a high-efficiency power supply circuit system and a control method thereof. Background Art

[0002] With the deepening of the reform of "coal to gas" and "smart water", the demand for the intelligence of fluid metering terminals - gas meters and water meters is getting higher and higher, and their integrated functions are becoming more and more, gradually developing into smart gas meters and smart water meters. In order to improve the functionality of gas meters and water meters, many large-load peripherals have been added, such as valves and remote communication modules, and functional modules that need to work under a stable power supply have gradually appeared, such as ultrasonic metering modules, which put forward new requirements for the design of power supply and electrical energy. Specifically, if the power supply design fails to take into account the current requirements of these new loads, it will cause the power supply to discharge under large loads. In extreme environments, large-load discharge will affect the core control power supply, causing the core voltage to drop, which will directly cause the meter to reset and lose control.

[0003] In order to cope with large load discharge, the existing technology usually adopts a power supply design that directly adds a large-capacity energy storage device at the front end of the power supply (usually a battery). However, since the core control circuit, peripheral load circuit, large-load peripherals and other high-power circuits will all continue to flow from the large-capacity energy storage device, the power supply design of the existing technology is not very efficient in utilizing the battery. At the same time, since the energy storage device needs to continue to flow for the high-power circuit of the entire meter, the transient current that needs to be provided is much larger than the design current, which makes the problem of ESR (Equivalent Series Resistance) of the energy storage device more prominent. Specifically, on the one hand, since the internal resistance of the battery is much smaller than the ESR of the energy storage device at the beginning of power supply, when transient current needs to be provided, the battery will preferentially release a large current. This is because the battery can quickly respond to the load demand until the internal resistance of the battery is greater than the ESR of the energy storage device. In the use of the meter product, the large current discharge will cause the battery to heat up, significantly accelerate the aging process of the battery, shorten the battery life, and affect the overall performance of the battery. On the other hand, when the large current released by the battery flows through the energy storage device with a higher ESR, a large voltage drop will be generated on the ESR of the energy storage device, resulting in significant voltage fluctuations, which means that the voltage across the energy storage device will drop rapidly, thereby reducing the useful voltage actually provided to the high-power circuit.

[0004] To this end, battery manufacturers have proposed improvement plans for existing power supply designs, such as energy-type lithium-argon battery + battery capacitor bundling solutions, power-type lithium-argon batteries, etc. By optimizing the battery's own design and materials, the battery's discharge current at peak load is reduced, thereby reducing the damage to the battery caused by high current discharge. However, the current improvement plans still cannot take into account both battery life and cost. Specifically, energy-type batteries focus on energy density, while power-type batteries focus on power density. Increasing energy density will inevitably increase costs, while increasing power density will sacrifice energy density, thus affecting the overall life of the battery. Summary of the invention

[0005] In response to the above technical problems, the present invention proposes a high-efficiency power supply circuit system and a control method thereof, aiming to avoid the technical problem of large current discharge of the battery caused by the ESR of the energy storage device, extend the service life of the battery and the large-capacity energy storage device, and improve the utilization efficiency of the battery.

[0006] In the first aspect, the present application provides a high-efficiency power supply circuit system, including a main power supply, a main power supply control circuit, a current limiting and voltage limiting circuit, a large-capacity energy storage device, a voltage conversion module and an energy storage device power detection module, the main power supply is connected to the main power supply control circuit, the main power supply control circuit is connected to the input end of the current limiting and voltage limiting circuit, the output end of the current limiting and voltage limiting circuit is connected to the input end of the large-capacity energy storage device, the output end of the large-capacity energy storage device is connected to the input end of the voltage conversion module, the output end of the voltage conversion module is connected to the high power consumption circuit, the voltage conversion module is used to adjust the voltage output by the large-capacity energy storage device to stabilize the output voltage required by the large power consumption circuit, and the energy storage device power detection module is connected to the large-capacity energy storage device.

[0007] In some embodiments, the system further includes a main power supply power detection module, which is connected to the main power supply and is used to detect the voltage of the main power supply and determine the power of the main power supply.

[0008] In some embodiments, the system also includes a backup power supply, a backup power supply control circuit and a power switching circuit. The backup power supply is connected to the backup power supply control circuit. The backup power supply control circuit and the main power supply control circuit are both connected to the power switching circuit. The power switching circuit is connected to the input end of the current limiting and voltage limiting circuit.

[0009] In some embodiments, the system further includes a backup power supply power detection module, which is connected to the backup power supply and is used to periodically determine the power level of the backup power supply.

[0010] In some embodiments, the system further comprises a cover-opening detection circuit, and the cover-opening detection circuit is used to detect whether the meter is opened without authorization.

[0011] In a second aspect, the present application provides a control method for a high-efficiency power supply circuit system, comprising the following steps: Step 102, the main power source charges the large-capacity energy storage device with a small current after the current is limited by the current-limiting and voltage-limiting circuit; Step 104, before the high power consumption circuit starts working, the power of the large-capacity energy storage device is judged. If the power of the large-capacity energy storage device does not reach the first power threshold, the main power supply is maintained to charge the large-capacity energy storage device with a small current. If the power of the large-capacity energy storage device reaches the first power threshold, the main power supply control circuit controls the loop between the main power supply and the system to be disconnected, and the large-capacity energy storage device provides a large current discharge for the high power consumption circuit; Step 106, real-time detection of the power of the large-capacity energy storage device is performed until the power of the large-capacity energy storage device is lower than the second power threshold or the high-power circuit ends its operation, and then the main power control circuit controls the loop between the main power supply and the system to be turned on.

[0012] In some embodiments, the control method includes: After the meter is powered on, the voltage of the main power supply is detected in real time; When the voltage of the main power supply changes, the power level of the main power supply is judged. If the power level of the main power supply is lower than the third power threshold, the meter enters a low power consumption mode and is powered by a large-capacity energy storage device. If the power level of the main power supply is not lower than the third power threshold, the meter maintains the current mode.

[0013] In some embodiments, the control method further comprises: When the power level of the main power supply is lower than the third power threshold or the main power supply is removed, the power switching circuit disconnects the main power supply control circuit and connects to the backup power supply control circuit, which controls the loop between the backup power supply and the system.

[0014] In some embodiments, the control method includes: When the power level of the backup power source is lower than the fourth power threshold or the backup power source is removed, the meter enters a low power consumption mode and is powered by a large-capacity energy storage device.

[0015] In some embodiments, the control method includes: When it is detected that the meter is opened without authorization, the power level of the main power supply and the power level of the backup power supply are judged in real time.

[0016] The beneficial technical effects of the present invention include at least: 1. A high-efficiency power supply circuit system and a control method thereof are adopted. Through the low-cost structural optimization design of the overall power supply circuit system, a current limiting and voltage limiting circuit is added between the main power supply and the large-capacity energy storage device, so as to effectively control the charging current and voltage, so that the battery is discharged in a small current mode during the charging process, thereby improving the utilization efficiency of the battery and avoiding the technical problem of large-current discharge of the battery caused by the ESR of the energy storage device, thereby significantly reducing the aging speed of the battery and extending the service life of the battery. In combination with the logic control of the power supply circuit system, through the cooperation of the main power supply control circuit and the energy storage device power detection module, the power supply circuit system is controlled to perform high-power consumption operation only when the large-capacity energy storage device has sufficient power and the loop between the main power supply and the system is disconnected. When the large-capacity energy storage device is insufficient in power or the large-power consumption circuit is finished working, the loop between the main power supply and the system is connected, thereby ensuring the stability and reliability of the power supply circuit system, and making the large-capacity energy storage device in a full-charged and shallow-charged state for a long time, avoiding over-discharge of the energy storage device, thereby extending the service life of the battery and the large-capacity energy storage device; 2. Through the switching structure design of the backup power supply combined with the power-off processing logic of the main power supply, a highly reliable power supply guarantee is provided for the meter, ensuring the safety of key data and the continuous operation of the power circuit system, and improving the overall system performance. Specifically, when the voltage of the main power battery changes, the power detection is performed, and the status of the main power can be monitored in real time, which is helpful to timely discover and provide power status warnings. When the power of the main power reaches the lower limit or is removed, the main and backup power switching circuit completes the backup power switching in time to replace the main power, ensuring the continuous power supply of the power circuit system. Further, even in the special case where both the main and backup power supplies fail, the power circuit system can automatically enter the low-power mode of the meter, and is temporarily powered by a large-capacity energy storage device, providing double protection for completing necessary emergency operations before power failure, such as data storage, remote reporting, closing valves and other emergency operations, ensuring the integrity of data storage operations during the power switching process, preventing data damage or loss, and significantly improving the reliability of the power circuit system.

[0017] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a high-efficiency power supply circuit system provided in Embodiment 1 of the present invention.

[0019] Figure 2 It is a flow chart of a control method of a high-efficiency power circuit system according to an embodiment of the present invention.

[0020] Figure 3This is a schematic diagram of the structure of a high-efficiency power supply circuit system provided in Embodiment 2 of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of a high-efficiency power supply circuit system provided in Embodiment 3 of the present invention.

[0022] Figure 5 Schematic diagram of the structure of the main / backup power supply control circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0024] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operate in a specific direction. Therefore, it should not be understood as a limitation of the present invention.

[0025] Embodiment 1: Please see attached Figure 1 , Figure 1 A schematic diagram of the structure of a high-efficiency power supply circuit system provided by an embodiment of the present specification is shown.

[0026] like Figure 1 As shown, the high-efficiency power supply circuit system may at least include: a main power supply, a main power supply control circuit, a current limiting and voltage limiting circuit, a large-capacity energy storage device, a voltage conversion module, and an energy storage device power detection module, wherein the main power supply is connected to the main power supply control circuit, the main power supply control circuit is connected to the input end of the current limiting and voltage limiting circuit, the output end of the current limiting and voltage limiting circuit is connected to the input end of the large-capacity energy storage device, the output end of the large-capacity energy storage device is connected to the input end of the voltage conversion module, the output end of the voltage conversion module is connected to the large power consumption circuit, the voltage conversion module is used to adjust the voltage output by the large-capacity energy storage device to stabilize the output voltage required by the large power consumption circuit, the energy storage device power detection module is connected to the large-capacity energy storage device, and the system is used to perform the following steps: Step 102, the main power source charges the large-capacity energy storage device with a small current after the current is limited by the current-limiting and voltage-limiting circuit; Step 104, before the high power consumption circuit starts to work, the energy storage device power detection module determines the power of the large-capacity energy storage device. If the power of the large-capacity energy storage device does not reach the first power threshold, the main power supply is maintained to charge the large-capacity energy storage device with a small current. If the power of the large-capacity energy storage device reaches the first power threshold, the main power control circuit controls the loop between the main power supply and the system to be disconnected, and the large-capacity energy storage device provides a large current discharge for the high power consumption circuit. Step 106, the energy storage device power detection module detects the power of the large-capacity energy storage device in real time until the power of the large-capacity energy storage device is lower than the second power threshold or the high-power circuit ends its operation, and then the main power control circuit controls the loop between the main power supply and the system to be turned on.

[0027] Among them, the main power supply is the power supply for smart gas meters, smart water meters and other meters. The main power supply in this embodiment can be alkaline batteries × 4 or ordinary lithium argon batteries (ER26500 or ER34615), etc., without optimizing the battery design and materials.

[0028] The current limiting and voltage limiting circuit in this embodiment is used to control the charging output circuit to be ≤100mA, and an electronic constant current source or the like may be used, or a current limiting resistor may be used for cost considerations.

[0029] The large-capacity energy storage device is a large-capacity capacitive device that is chargeable and can discharge a large current to a subsequent load, and may be a supercapacitor, a lithium-ion supercapacitor, a battery capacitor, etc., which is not limited in this embodiment.

[0030] It is understandable that the voltage of the battery will gradually decrease during the discharge process. However, the core control circuits of many electronic devices require a stable voltage to operate normally. To this end, the present embodiment sets a voltage conversion module to adjust the voltage output by the large-capacity energy storage device to a suitable voltage for the large power consumption circuit to ensure a stable voltage output. Furthermore, the voltage conversion module may include a number of different voltage conversion devices, and different voltage conversion devices are used for the voltage requirements of different large power consumption circuits. For example, for the core control circuit, etc., an LDO device can be used to stabilize the output current at a lower, constant level, such as adjusting the output current of this path to less than or equal to 10mA; for the peripheral load circuit, a boost DC-DC converter can be used to stabilize the output current of this path to not less than 1.5A.

[0031] The energy storage device power detection module is a device that indirectly determines the power status of the energy storage device by detecting the voltage of the large-capacity energy storage device, thereby serving as a basis for determining whether the large-capacity energy storage device can continue to supply power to the high-power circuit. The energy storage device power detection module is similar to the power detection device in the prior art, and this embodiment does not limit this.

[0032] Specifically, the technical concept of this embodiment is: by designing a series connection between the main power supply, the main power supply control circuit, the current limiting and voltage limiting circuit and the large-capacity energy storage device, the current limiting and voltage limiting circuit is used to convert the voltage of the main power supply to a voltage range within which the large-capacity energy storage device can work normally, and the charging current is controlled within the acceptable range of the large-capacity energy storage device. Under the series connection, the charging circuit current from the main power supply to the current limiting and voltage limiting circuit and then to the input end of the large-capacity energy storage device is ensured to be a small current, the main power supply provides a small current electric energy supplement to the large-capacity energy storage device, and then the large-capacity energy storage device releases a large current, and a stable voltage output is provided to the large power consumption circuit through the adjustment of the voltage conversion module. Therefore, the design principle of "small current charging and large current discharging" of the power supply circuit system can be met, and the technical problem of large current discharge of the battery caused by the ESR of the energy storage device is overcome only through the low-cost structural design of the overall power supply circuit, and the stability and reliability of the power supply circuit system are ensured.

[0033] On the other hand, please see the attached Figure 2 , an embodiment of the present specification provides a flow chart of a control method of a high-efficiency power supply circuit system.

[0034] like Figure 2 As shown, the control method of the high-efficiency power supply circuit system may at least include the following steps: Step 102, the main power source charges the large-capacity energy storage device with a small current after the current is limited by the current-limiting and voltage-limiting circuit; Step 104, before the high power consumption circuit starts to work, the energy storage device power detection module determines the power of the large-capacity energy storage device. If the power of the large-capacity energy storage device does not reach the first power threshold, the main power supply is maintained to charge the large-capacity energy storage device with a small current. If the power of the large-capacity energy storage device reaches the first power threshold, the main power control circuit controls the loop between the main power supply and the system to be disconnected, and the large-capacity energy storage device provides a large current discharge for the high power consumption circuit. Step 106, the energy storage device power detection module detects the power of the large-capacity energy storage device in real time until the power of the large-capacity energy storage device is lower than the second power threshold or the high-power circuit ends its operation, and then the main power control circuit controls the loop between the main power supply and the system to be turned on.

[0035] Specifically, the technical concept of this embodiment is as follows: since the high-power consumption operation of the entire meter is usually in an intermittent working mode, the high-power consumption circuit basically works once every one day or more. Therefore, this embodiment is designed to use an energy storage device power detection module to judge the power of the large-capacity energy storage device before the high-power consumption circuit starts working, and high-power consumption operation can only be performed when the power of the large-capacity energy storage device is sufficient. Before the high-power consumption operation is performed, the main power supply control circuit is used to control the loop disconnection between the main power supply and the system, which further avoids the technical problem of high-current discharge of the battery caused by the ESR of the energy storage device, extends the service life of the battery, and improves the battery utilization efficiency. At the same time, in the process of the large-capacity energy storage device providing high-current discharge for the high-power consumption circuit, the energy storage device is used to detect the power of the large-capacity energy storage device. The device power detection module detects the power of the large-capacity energy storage device in real time until the power of the large-capacity energy storage device is lower than the second power threshold or the large power consumption circuit ends its operation. The main power control circuit controls the loop between the main power supply and the system to be connected. It can be understood that after the loop between the main power supply and the system is connected, the main power supply can start the charging circuit for the large-capacity energy storage device, and repeat steps 102 to 106 to realize the logic control closed loop of "small current charging and large current discharging" of the power circuit system, thereby ensuring the stability and reliability of the power circuit system. Moreover, under the logic control of this embodiment, the large-capacity energy storage device is in a full-charge and shallow-charge state for a long time and will not be damaged due to over-discharge, thereby achieving the premise of ensuring the battery life and improving the battery utilization efficiency, and also effectively ensuring the service life of the large-capacity energy storage device.

[0036] Through the low-cost structural optimization design of the overall power supply circuit system, a current limiting and voltage limiting circuit is added between the main power supply and the large-capacity energy storage device, which effectively controls the charging current and voltage, so that the battery is discharged in a small current mode during the charging process, thereby improving the battery utilization efficiency and avoiding the technical problem of large-current discharge of the battery caused by the ESR of the energy storage device, thereby significantly reducing the aging speed of the battery and extending the service life of the battery. Combined with the logic control of the power supply circuit system, through the cooperation of the main power supply control circuit and the energy storage device power detection module, the power supply circuit system is controlled to perform high-power consumption operations only when the large-capacity energy storage device is fully charged and the loop between the main power supply and the system is disconnected. When the large-capacity energy storage device is insufficient or the large-power circuit is finished working, the loop between the main power supply and the system is turned on, ensuring the stability and reliability of the power supply circuit system, and making the large-capacity energy storage device in a full-charge and shallow-charge state for a long time, avoiding over-discharge of the energy storage device, thereby extending the service life of the battery and the large-capacity energy storage device.

[0037] Embodiment 2: Please see attached Figure 3 , Figure 3A schematic diagram of the structure of a high-efficiency power supply circuit system provided in yet another embodiment of the present specification is shown.

[0038] like Figure 3 As shown, in this embodiment Figure 1 On the basis of the high-efficiency power supply circuit system provided in the corresponding embodiment, the situation of insufficient power of the main power supply is taken into consideration. Specifically, the high-efficiency power supply circuit system provided in this embodiment adds a main power supply power detection module, and the main power supply power detection module is connected to the main power supply. The main power supply power detection module is used to detect the voltage of the main power supply and judge the power of the main power supply.

[0039] Among them, the main power supply power detection module is a device that indirectly determines the power status of the main power supply by detecting the voltage of the main power supply, thereby serving as a basis for determining whether the battery power can continue to be used, which is similar to the energy storage device power detection module set in the aforementioned embodiment.

[0040] On the other hand, another embodiment of the present specification provides a control method for a high-efficiency power supply circuit system. Compared with the control method for a high-efficiency power supply circuit system provided in the above embodiment, this embodiment further includes the following steps: After the meter is powered on, the main power supply power detection module detects the voltage of the main power supply in real time; When the voltage of the main power supply changes, the main power supply power detection module determines the power of the main power supply. If the power of the main power supply is lower than the third power threshold, the meter enters a low power consumption mode and is powered by a large-capacity energy storage device. If the power of the main power supply is not lower than the third power threshold, the meter maintains the current mode.

[0041] It is understandable that the step in which the main power supply power detection module determines whether the power is sufficient when the voltage of the main power supply changes to determine whether the meter needs to enter the low power consumption mode may exist during the execution of any step from step 102 to step 106.

[0042] This implementation provides a power-off processing logic for the main power supply. When the voltage of the main power supply battery changes, power detection is performed, and the status of the main power supply can be monitored in real time, which helps to timely discover and provide power status warnings. When the power of the main power supply is lower than the third power threshold (i.e., the lower limit of power), the meter enters a low-power mode and is powered by a large-capacity energy storage device, that is, some high-power event functions are prohibited. Before maintenance personnel come to replace the main power supply, only the large-capacity energy storage device is used to power the core control circuit and the external measurement module circuit to ensure that abnormal processing is completed (such as storage of metering data, reporting of the main power supply status to the remote control terminal, and closing the valves of the water or gas pipelines) to ensure that data is not lost.

[0043] Furthermore, in this embodiment, the control method of the high-efficiency power supply circuit system may further include the following steps: The main power supply control circuit controls the circuit disconnection between the main power supply and the system; The main power supply power detection module determines the power of the main power supply; After the main power supply power detection is completed, the main power supply control circuit controls the loop between the main power supply and the system to restore to the connection state before the power detection.

[0044] It can be understood that the above step of disconnecting the circuit between the main power supply and the system before the main power supply power detection module determines the power of the main power supply helps to improve the accuracy of the main power supply power detection.

[0045] Embodiment three: Please see attached Figure 4 , Figure 4 A schematic diagram of the structure of a high-efficiency power supply circuit system provided in yet another embodiment of the present specification is shown.

[0046] like Figure 4 As shown, in this embodiment Figure 3 On the basis of the high-efficiency power supply circuit system provided in the corresponding embodiment, the situation in which the main power supply is removed during maintenance and replacement is taken into consideration. Specifically, the high-efficiency power supply circuit system provided in this embodiment adds a backup power supply, a backup power supply control circuit and a power switching circuit. The backup power supply is connected to the backup power supply control circuit, and the backup power supply control circuit and the main power supply control circuit are both connected to the power switching circuit, and the power switching circuit is connected to the input end of the current limiting and voltage limiting circuit.

[0047] Among them, the main / backup power supply control circuit is the core of the high-efficiency power supply circuit system design to realize logic control. The commonly used power supply control circuit currently adopts a dual MOS tube design + diode design. However, under the existing power supply control circuit design, even a Schottky diode will cause a significant voltage drop when the current flows through, so that part of the input voltage is consumed, thereby reducing the efficiency of the entire charging output circuit. In the case of low voltage difference, this efficiency loss is more significant. For this reason, the main / backup power supply control circuit in this embodiment preferably adopts a load switch with an ideal diode function. The structural schematic diagram of the main / backup power supply control circuit is shown in the attached figure. Figure 5 As shown. By using the load switch with ideal diode function as the main / backup power supply control circuit, the low voltage loss can be reduced to 1 / 20 of the original general diode (taking Schottky diode as an example), and the tube voltage drop is only 20mV, achieving low loss. At the same time, the power consumption in the reverse cut-off state is 0uA, that is, the reverse leakage current is also 0μA, preventing the reverse current from damaging the front-stage battery and other equipment.

[0048] Furthermore, in this embodiment, the system also includes a backup power supply power detection module, which is connected to the backup power supply and is used to periodically determine the power level of the backup power supply.

[0049] The structure of the backup power supply power detection module in this embodiment is similar to the main power supply power detection module described above, and will not be described in detail in this embodiment. Furthermore, the backup power supply can be set with a longer power detection cycle to reduce the detection frequency, thereby reducing the self-discharge of the backup battery and extending the service life of the backup power supply.

[0050] This embodiment adds a switching structure for a backup power supply. When the main power supply is removed or the power is insufficient, the system can automatically switch to the backup power supply to ensure the continuous operation of the meter and improve the reliability of the system.

[0051] On the other hand, another embodiment of the present specification provides a control method for a high-efficiency power supply circuit system. Figure 2 The control method of the high-efficiency power supply circuit system provided in the corresponding embodiment further takes into account the situation that the main power supply is removed during maintenance and replacement. Specifically, the control method of the high-efficiency power supply circuit system provided in the embodiment adds the following steps: When the power level of the main power supply is lower than the third power threshold or the main power supply is removed, the power switching circuit disconnects the main power supply control circuit and connects to the backup power supply control circuit, which controls the loop between the backup power supply and the system.

[0052] Specifically, when the main power supply is in the interval period of battery replacement or the battery is removed by external force, under the logical control of the power switching circuit and the backup power supply control circuit, the backup power supply is enabled and temporarily replaces the main power supply to execute steps 102-106 to maintain the basic operation of the high-power consumption circuit and wait for the arrival of maintenance personnel.

[0053] Furthermore, in this embodiment, the control method may further include the following steps: When the power level of the backup power source is lower than the fourth power threshold or the backup power source is removed, the meter enters a low power consumption mode and is powered by a large-capacity energy storage device.

[0054] The control method provided in this embodiment provides a highly reliable power supply guarantee for the meter, ensures the security of key data and the continuous operation of the power circuit system, and improves the overall system performance. Specifically, when the main power supply is low or removed, the main-backup power supply switching circuit promptly completes the backup power supply switching to replace the main power supply, ensuring the continuous power supply of the power circuit system. Furthermore, even in the special case where both the main and backup power supplies fail, the power circuit system can automatically enter the low-power mode of the meter and be temporarily powered by a large-capacity energy storage device, providing double protection for completing necessary emergency operations before power outages, such as data storage, remote reporting, closing valves and other emergency operations, ensuring the integrity of data storage operations during the power switching process, preventing data damage or loss, and significantly improving the reliability of the power circuit system.

[0055] Embodiment 4: This embodiment Figure 4 On the basis of the high-efficiency power supply circuit system provided in the corresponding embodiment, the dangerous situation of the meter being opened without authorization is taken into consideration. Specifically, the high-efficiency power supply circuit system provided in this embodiment adds a cover opening detection circuit, which is used to detect whether the meter is opened without authorization, providing a structural basis for the adaptive adjustment of the power supply circuit system.

[0056] Among them, unauthorized situations include but are not limited to physical damage such as the meter casing being illegally opened or damaged, unauthorized personnel attempting to repair or modify the meter, etc., which are not limited in this embodiment.

[0057] The high-efficiency power supply circuit system architecture design provided in this embodiment enables the large-capacity energy storage device to support the power supply of the meter for a period of time and complete basic tasks such as data preservation, remote reporting, and valve closing when the meter is attacked from the outside and both the main and backup power supplies are removed.

[0058] On the other hand, another embodiment of the present specification provides a control method for a high-efficiency power supply circuit system. Figure 2 The control method of the high-efficiency power circuit system provided in the corresponding embodiment is provided with the following additional steps: When the cover opening detection circuit detects that the meter is opened without authorization, the main power supply detection module and the backup power supply detection module determine the power of the main power supply and the power of the backup power supply in real time.

[0059] Specifically, in this embodiment, after the cover opening detection circuit detects that the meter is abnormally opened, the main / backup power supply will enter the control logic of rapid power detection. At this time, the power detection module of the main / backup power supply detects once per second. When it is detected that the main power supply is removed, the main-backup power supply switching circuit automatically completes the switching of the backup power supply to the main power supply. When the backup power supply is also removed, the meter enters a low-power consumption mode and is powered by a large-capacity energy storage device. It reports an alarm message to the remote control terminal and closes the valve to ensure basic metering data storage functions, and quickly takes measures to protect the meter and data security, ensuring that in the special case where the meter is abnormally opened and the power supply is illegally removed, the large-capacity energy storage device can still provide electrical energy to ensure that the metering data is not interrupted.

[0060] The above description is only the preferred embodiment disclosed in this application and the description of the technical principle used. Those skilled in the art should understand that the scope of protection involved in this disclosure is not limited to the technical solution formed by a specific combination of the above technical features, but also should cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in this disclosure (but not limited to) to form a technical solution.

[0061] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

Claims

1. A high-efficiency power supply circuit system, characterized in that: It includes a main power supply, a main power supply control circuit, a current limiting and voltage limiting circuit, a large-capacity energy storage device, a voltage conversion module and an energy storage device power detection module. The main power supply is connected to the main power supply control circuit, the main power supply control circuit is connected to the input end of the current limiting and voltage limiting circuit, the output end of the current limiting and voltage limiting circuit is connected to the input end of the large-capacity energy storage device, the output end of the large-capacity energy storage device is connected to the input end of the voltage conversion module, the output end of the voltage conversion module is connected to the large power consumption circuit, the voltage conversion module is used to adjust the voltage output by the large-capacity energy storage device to stabilize the output voltage required by the large power consumption circuit, and the energy storage device power detection module is connected to the large-capacity energy storage device.

2. A high-efficiency power circuit system as claimed in claim 1, characterized in that: The system also includes a main power supply power detection module, which is connected to the main power supply and is used to detect the voltage of the main power supply and determine the power of the main power supply.

3. A high-efficiency power supply circuit system as claimed in claim 2, characterized in that: The system also includes a backup power supply, a backup power supply control circuit and a power switching circuit. The backup power supply is connected to the backup power supply control circuit. The backup power supply control circuit and the main power supply control circuit are both connected to the power switching circuit. The power switching circuit is connected to the input end of the current limiting and voltage limiting circuit.

4. A high-efficiency power supply circuit system as claimed in claim 3, characterized in that: The system also includes a backup power supply power detection module, which is connected to the backup power supply and is used to periodically determine the power level of the backup power supply.

5. The high-efficiency power circuit system as claimed in claim 1, characterized in that: The system further comprises a cover-opening detection circuit, which is used to detect whether the meter is opened without authorization.

6. A control method for a high-efficiency power supply circuit system, characterized in that: The following steps are involved: Step 102, the main power source charges the large-capacity energy storage device with a small current after the current is limited by the current-limiting and voltage-limiting circuit; Step 104, before the high power consumption circuit starts working, the power of the large-capacity energy storage device is judged. If the power of the large-capacity energy storage device does not reach the first power threshold, the main power supply is maintained to charge the large-capacity energy storage device with a small current. If the power of the large-capacity energy storage device reaches the first power threshold, the main power supply control circuit controls the loop between the main power supply and the system to be disconnected, and the large-capacity energy storage device provides a large current discharge for the high power consumption circuit; Step 106, real-time detection of the power of the large-capacity energy storage device is performed until the power of the large-capacity energy storage device is lower than the second power threshold or the high-power circuit ends its operation, and then the main power control circuit controls the loop between the main power supply and the system to be turned on.

7. A control method for a high-efficiency power circuit system as claimed in claim 6, characterized in that: include: After the meter is powered on, the voltage of the main power supply is detected in real time; When the voltage of the main power supply changes, the power level of the main power supply is judged. If the power level of the main power supply is lower than the third power threshold, the meter enters a low power consumption mode and is powered by a large-capacity energy storage device. If the power level of the main power supply is not lower than the third power threshold, the meter maintains the current mode.

8. The control method of a high-efficiency power circuit system as claimed in claim 7, characterized in that: Also includes: When the power level of the main power supply is lower than the third power threshold or the main power supply is removed, the power switching circuit disconnects the main power supply control circuit and connects to the backup power supply control circuit, which controls the loop between the backup power supply and the system.

9. The control method of a high-efficiency power circuit system as claimed in claim 8, characterized in that: include: When the power level of the backup power source is lower than the fourth power threshold or the backup power source is removed, the meter enters a low power consumption mode and is powered by a large-capacity energy storage device.

10. The control method of a high-efficiency power circuit system as claimed in claim 6, characterized in that: include: When it is detected that the meter is opened without authorization, the power level of the main power supply and the power level of the backup power supply are judged in real time.

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