CN112564192A - Safe power supply system and method suitable for ultra-low power consumption application - Google Patents
Safe power supply system and method suitable for ultra-low power consumption application Download PDFInfo
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- CN112564192A CN112564192A CN201910851776.7A CN201910851776A CN112564192A CN 112564192 A CN112564192 A CN 112564192A CN 201910851776 A CN201910851776 A CN 201910851776A CN 112564192 A CN112564192 A CN 112564192A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
Abstract
The invention relates to the technical field of power supply, and discloses a safe power supply system and method suitable for ultra-low power consumption application. The system comprises a main control unit, a main control power supply unit, a secondary power supply unit, a tertiary power supply unit and an energy storage unit, wherein the energy storage unit is used for supplying power to the main control power supply unit, the secondary power supply unit and the tertiary power supply unit, the main control power supply unit is a long power supply unit, the secondary power supply unit and the tertiary power supply unit are power supply units which can be turned off, the main control unit is used for monitoring the electric quantity of the energy storage unit, comparing the monitored electric quantity with a first threshold value, and controlling the respective power supply modes of the main control power supply unit, the secondary power supply unit and the tertiary power supply unit according to a comparison result. Therefore, the power supply modes of the power supply units can be correspondingly controlled according to the electric quantity condition of the energy storage unit, and the problem that the power consumption of the equipment cannot be controlled when the energy storage unit is in the extremely low electric quantity condition is solved.
Description
Technical Field
The invention relates to the technical field of power supply, in particular to a safe power supply system and method suitable for ultra-low power consumption application.
Background
Geological disaster monitoring equipment is mostly used for field implementation and installation, the later maintenance is inconvenient, and the time and labor cost are high. The power supply is used as the 'heart' of the electronic product equipment, and whether the power supply can be normally supplied plays a vital role in whether the equipment can normally operate. For the field equipment, no commercial power is supplied, and the equipment is generally supplied with power by solar energy and a rechargeable battery, which has strict requirements on low power consumption of the equipment.
The conventional low-power-consumption power supply design mainly focuses on reducing power consumption, and then sufficient allowance is reserved when a solar panel and a battery are selected, so that the equipment is ensured to operate in a normal working mode. Once the battery is in extremely low electric quantity, equipment can't operate in normal mode, can't guarantee not only that the consumption is very low this moment, also can cause certain influence to solar charging.
Disclosure of Invention
The invention provides a safe power supply system and a safe power supply method suitable for ultra-low power consumption application, which can solve the technical problems that the power consumption of equipment cannot be controlled and solar charging is influenced under the condition of extremely low electric quantity in the prior art.
The invention provides a safe power supply system suitable for ultra-low power consumption application, wherein the system comprises a main control unit, a main control power supply unit, a secondary power supply unit, a tertiary power supply unit and an energy storage unit, wherein the energy storage unit is used for supplying power for the main control power supply unit, the secondary power supply unit and the tertiary power supply unit, the main control power supply unit is a long power supply unit, the secondary power supply unit and the tertiary power supply unit are power supply units which can be switched off, wherein,
the main control unit is used for monitoring the electric quantity of the energy storage unit, comparing the monitored electric quantity with a first threshold value, and controlling the respective power supply modes of the main control power supply unit, the secondary power supply unit and the tertiary power supply unit according to the comparison result.
Preferably, the controlling, by the main control unit according to the comparison result, respective operating modes of the main control power supply unit, the secondary power supply unit, and the tertiary power supply unit include:
when the comparison result shows that the monitored electric quantity is larger than the first threshold value, the main control unit controls the three power supply units to enter a dormant state, at the moment, the main control power supply unit and the secondary power supply unit are both in a low power consumption mode, and the tertiary power supply unit is in a turn-off mode;
and under the condition that the monitored electric quantity is less than or equal to the first threshold value as a comparison result, the main control unit controls the three power supply units to enter a power supply protection state, at the moment, the main control power supply unit is in an ultra-low power consumption mode, and the secondary power supply unit and the tertiary power supply unit are both in a turn-off mode.
Preferably, the main control unit is further configured to control the three power supply units to release a power supply protection state to enter a sleep state when the detected power amount changes from being less than or equal to the first threshold to being greater than a second threshold, where both the main control power supply unit and the secondary power supply unit are in a low power consumption mode and the tertiary power supply unit is in an off mode, where the second threshold is greater than the first threshold.
Preferably, when the sleep state is entered for a predetermined time or when a wake-up signal is received after the sleep state is entered, the three power supply units enter an operating power supply state, and at this time, the main control power supply unit, the secondary power supply unit, and the tertiary power supply unit are all in an operating mode.
Preferably, the system further comprises a solar panel and a current limiting protection unit, wherein,
when the voltage of the solar panel exists, the solar panel supplies power to the main control power supply unit, the secondary power supply unit and the tertiary power supply unit through the current-limiting protection unit and charges the energy storage device at the same time;
when the solar panel voltage does not exist, the energy storage device supplies power for the main control power supply unit, the secondary power supply unit and the tertiary power supply unit.
The invention also provides a safe power supply method suitable for ultra-low power consumption application, wherein the method comprises the following steps:
the method comprises the steps that a main control unit monitors the electric quantity of an energy storage unit, wherein the energy storage unit supplies power to a main control power supply unit, a secondary power supply unit and a tertiary power supply unit, the main control power supply unit is a long power supply unit, and the secondary power supply unit and the tertiary power supply unit are power supply units which can be turned off;
the main control unit compares the monitored electric quantity with a first threshold value;
and the main control unit controls the respective power supply modes of the main control power supply unit, the secondary power supply unit and the tertiary power supply unit according to the comparison result.
Preferably, the controlling, by the main control unit according to the comparison result, respective operating modes of the main control power supply unit, the secondary power supply unit, and the tertiary power supply unit include:
controlling the three power supply units to enter a dormant state under the condition that the monitored electric quantity is greater than the first threshold value according to the comparison result, wherein the main control power supply unit and the secondary power supply unit are both in a low power consumption mode, and the tertiary power supply unit is in a turn-off mode;
and under the condition that the monitored electric quantity is less than or equal to the first threshold value as a comparison result, controlling the three power supply units to enter a power supply protection state, wherein the main control power supply unit is in an ultra-low power consumption mode, and the secondary power supply unit and the tertiary power supply unit are both in a turn-off mode.
Preferably, the method further comprises:
the main control unit controls the three power supply units to release a power supply protection state to enter a dormant state when the detected electric quantity is changed from being smaller than or equal to the first threshold value to being larger than a second threshold value, at the moment, the main control power supply unit and the secondary power supply unit are both in a low power consumption mode, the tertiary power supply unit is in a turn-off mode, and the second threshold value is larger than the first threshold value.
Preferably, the method further comprises:
when the power supply unit enters the sleep state for a preset time or receives a wake-up signal after entering the sleep state, the three power supply units enter the running power supply state, and at the moment, the main control power supply unit, the secondary power supply unit and the tertiary power supply unit are all in a running mode.
Preferably, the second threshold is greater than the first threshold by a predetermined amount.
Through the technical scheme, the electric quantity of the energy storage unit can be monitored, the monitored electric quantity can be compared with the first threshold value, and then the respective power supply modes of the main control power supply unit, the secondary power supply unit and the tertiary power supply unit can be controlled according to the comparison result. Therefore, the power supply modes of the power supply units can be correspondingly controlled according to the electric quantity condition of the energy storage unit, and the problem that the power consumption of the equipment cannot be controlled when the energy storage unit is in the extremely low electric quantity condition is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 illustrates a block diagram of a secure power system suitable for ultra-low power applications, in accordance with embodiments of the present invention;
fig. 2 shows a flowchart of a secure power supply method suitable for ultra-low power applications according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 shows a block diagram of a secure power supply system suitable for ultra-low power applications, according to an embodiment of the invention.
As shown in fig. 1, an embodiment of the present invention provides a safe power supply system suitable for ultra-low power consumption applications, where the system includes a main control unit 20, a main control power supply unit (also referred to as a primary power supply unit) 30, a secondary power supply unit 40, a tertiary power supply unit 50, and an energy storage unit 70, where the energy storage unit 70 is configured to supply power to the main control power supply unit 30, the secondary power supply unit 40, and the tertiary power supply unit 50, the main control power supply unit 30 is a long power supply unit, and the secondary power supply unit 40 and the tertiary power supply unit 50 are power supply units that can be turned off, where,
the main control unit 20 is configured to monitor an electric quantity of the energy storage unit 70, compare the monitored electric quantity with a first threshold, and control respective power supply modes of the main control power supply unit 30, the secondary power supply unit 40, and the tertiary power supply unit 50 according to a comparison result.
Through the technical scheme, the electric quantity of the energy storage unit can be monitored, the monitored electric quantity can be compared with the first threshold value, and then the respective power supply modes of the main control power supply unit, the secondary power supply unit and the tertiary power supply unit can be controlled according to the comparison result. Therefore, the power supply modes of the power supply units can be correspondingly controlled according to the electric quantity condition of the energy storage unit, and the problem that the power consumption of the equipment cannot be controlled when the energy storage unit is in the extremely low electric quantity condition is solved.
The main control unit 20 may be an MCU chip with a low power consumption function, and the power consumption may reach the uA level under the condition that the IO state can be controlled. Therefore, the electric quantity consumption of the energy storage unit can be reduced. The energy storage unit may be, for example, a rechargeable battery, but the present invention is not limited thereto.
It should be understood by those skilled in the art that although only three levels of power supply units are described in the above embodiments, they are merely exemplary and are not intended to limit the present invention, and those skilled in the art may determine the number of levels of power supply units according to practical situations.
The power supply unit is divided into a plurality of levels for management, so that the power consumption of the whole equipment is favorably controlled.
The main control power supply unit 30 includes an ultra-low power consumption mode, a low power consumption mode and an operation mode; the secondary power supply unit 40 comprises an off mode, a low power consumption mode and an operation mode; the three stage power supply unit 50 includes an off mode and an operating mode. The power consumption in the ultra-low power mode is less than the power consumption in the low power mode.
According to an embodiment of the present invention, the controlling, by the main control unit 20, the respective operation modes of the main control power supply unit 30, the secondary power supply unit 40, and the tertiary power supply unit 50 according to the comparison result includes:
when the comparison result indicates that the monitored electric quantity is greater than the first threshold value, the main control unit 20 controls the three power supply units to enter a sleep state, at this time, the main control power supply unit 30 and the secondary power supply unit 40 are both in a low power consumption mode, and the tertiary power supply unit 50 is in a shutdown mode;
that is, the power greater than the first threshold value indicates that the power is safe, and the main control power supply unit 30 and the secondary power supply unit 40 enter a sleep state, in the sleep state, both are in a low power consumption mode, and the tertiary power supply unit 50 is in an off mode, at this time, the requirement of low power consumption of the device is met.
In the case that the monitored electric quantity is less than or equal to the first threshold value as a result of the comparison, the main control unit 20 controls the three power supply units to enter a power supply protection state, at this time, the main control power supply unit 30 is in an ultra-low power consumption mode, and both the secondary power supply unit 40 and the tertiary power supply unit 50 are in an off mode.
That is, the electric quantity is reduced to be less than or equal to the first threshold value to indicate that the electric quantity is dangerous, and the main control power supply unit 30 enters a power supply protection state, and in the power supply protection state, the main control power supply unit 30 is in an ultra-low power consumption mode, the secondary power supply unit 40 and the tertiary power supply unit 50 are both in a turn-off mode, and at the moment, the electric quantity of the energy storage unit can only be awakened and detected at regular time, and other functions cannot be completed, so that the power consumption of the equipment is reduced to be extremely low, and the.
Therefore, the periodic working mode switching control can be performed on each power supply unit, so that the requirement of low power consumption is finally met while the safe power supply is ensured.
According to an embodiment of the present invention, the main control unit 20 is further configured to control the three power supply units to release the power protection state to enter a sleep state when the detected power amount changes from being less than or equal to the first threshold to being greater than a second threshold, where the main control power supply unit 30 and the secondary power supply unit 40 are both in a low power consumption mode, and the tertiary power supply unit 50 is in an off mode, where the second threshold is greater than the first threshold.
That is, when the amount of power of the energy storage unit is restored from being less than or equal to the first threshold (for example, after the energy storage unit is charged by various methods) to being greater than the second threshold, the power supply protection state may be released, and thus the sleep state may be entered.
The first threshold and the second threshold may be determined according to a charge-discharge curve of the energy storage device.
According to an embodiment of the invention, the second threshold wall is larger than the first threshold by a predetermined amount.
Therefore, frequent switching of the power supply unit between the power supply protection state and the power supply release protection state due to unstable electric quantity can be avoided.
According to an embodiment of the present invention, when entering the sleep state for a predetermined time or receiving a wake-up signal after entering the sleep state, the three power supply units enter the operating power supply state, and at this time, the main control power supply unit 30, the secondary power supply unit 40, and the tertiary power supply unit 50 are all in the operating mode.
That is, the power supply unit may be awakened into a running power supply state (i.e., a normal operating state) according to a certain condition.
According to one embodiment of the invention, the system further comprises a solar panel 60 and a current limiting protection unit 10, wherein,
when the voltage of the solar panel exists, the solar panel 60 supplies power to the main control power supply unit 30, the secondary power supply unit 40 and the tertiary power supply unit 50 through the current limiting protection unit 10, and simultaneously charges the energy storage device 70;
therefore, the voltage of the solar panel can simultaneously supply power to the equipment and charge the energy storage device, and the solar utilization efficiency is greatly improved.
When there is no solar panel voltage, the energy storage device 70 supplies power to the main control power supply unit 30, the secondary power supply unit 40, and the tertiary power supply unit 50.
When the solar panel is used for supplying and charging, the solar panel voltage may not exist for a long time due to environmental factors, so that the electric quantity of the energy storage unit is reduced to be below a first threshold value, and at the moment, the solar panel can be supplied with power only by depending on the extremely low power consumption of the residual battery electric quantity to wait for sufficient and effective solar panel voltage. When the solar panel voltage is effective, all solar voltage is almost completely used for charging the energy storage unit due to the fact that the equipment is at extremely low power consumption, and then the energy storage unit can be ensured to recover electric quantity. Therefore, even under the condition of extremely low power, the solar charging is not influenced because the power consumption of the device can be controlled.
For example, the solar panel 60 may be 5.5V @0.35W, the energy storage unit 70 may be a 3.7V @3350mA lithium battery, and the operating voltage range is 2.5-4.2V. The current-limiting protection unit 10 can use a CN3082 control chip to realize current-limiting protection of the device, the main control unit 20 can use an STM32L431 single chip microcomputer, and the main control power supply unit 30 can use voltage reduction-voltage boosting to perform power conversion to supply power to the single chip microcomputer and the watchdog chip. The secondary power supply unit 40 may supply power to the LoRa chip or the MEMS chip. The three-stage power supply unit 50 can supply power to the FLASH, the temperature sensor and the GPS chip. In addition, according to the charging and discharging curve of the lithium battery, the first threshold value T1 can be set to be 2.9V, and the second threshold value T2 can be set to be 3.1V.
It will be appreciated by persons skilled in the art that the above examples are illustrative only and are not intended to be limiting.
Fig. 2 shows a flowchart of a secure power supply method suitable for ultra-low power applications according to an embodiment of the present invention.
As shown in fig. 2, an embodiment of the present invention further provides a secure power supply method suitable for ultra-low power consumption applications, where the method includes:
s10, a main control unit monitors the electric quantity of an energy storage unit, wherein the energy storage unit supplies power to a main control power supply unit, a secondary power supply unit and a tertiary power supply unit, the main control power supply unit is a long power supply unit, and the secondary power supply unit and the tertiary power supply unit are power supply units which can be turned off;
before S10, the system may be initialized and then a system self-check may be performed.
S20, the master control unit comparing the monitored power amount with a first threshold (T1);
and S30, the main control unit controls the respective power supply modes of the main control power supply unit, the secondary power supply unit and the tertiary power supply unit according to the comparison result.
Through the technical scheme, the electric quantity of the energy storage unit can be monitored, the monitored electric quantity can be compared with the first threshold value, and then the respective power supply modes of the main control power supply unit, the secondary power supply unit and the tertiary power supply unit can be controlled according to the comparison result. Therefore, the power supply modes of the power supply units can be correspondingly controlled according to the electric quantity condition of the energy storage unit, and the problem that the power consumption of the equipment cannot be controlled when the energy storage unit is in the extremely low electric quantity condition is solved.
According to an embodiment of the present invention, the step of controlling, by the master control unit according to the comparison result, respective operation modes of the master control power supply unit, the secondary power supply unit, and the tertiary power supply unit in S30 includes:
s21, controlling the three power supply units to enter a sleep state under the condition that the comparison result shows that the monitored electric quantity is larger than the first threshold (T1), wherein the main control power supply unit and the secondary power supply unit are both in a low power consumption mode at the moment, and the tertiary power supply unit is in a turn-off mode;
and S22, controlling the three power supply units to enter a power supply protection state under the condition that the comparison result shows that the monitored electric quantity is less than or equal to the first threshold (T1), wherein the main control power supply unit is in an ultra-low power consumption mode at the moment, and the secondary power supply unit and the tertiary power supply unit are both in a turn-off mode.
That is, in S20, if the monitored amount of power is greater than the first threshold, S21 is entered, otherwise S22 is entered.
According to an embodiment of the invention, the method further comprises:
s31, judging whether the detected electric quantity is changed from being less than or equal to the first threshold (T1) to being greater than a second threshold (T2), if so, entering S32, otherwise, returning to S22;
and S32, controlling the three power supply units to release the power supply protection state and enter a sleep state, wherein the main control power supply unit and the secondary power supply unit are both in a low power consumption mode, the tertiary power supply unit is in a turn-off mode, and the second threshold is greater than the first threshold.
That is, in the case where the detected power amount changes from less than or equal to the first threshold (T1) to greater than the second threshold (T2), the three power supply units are controlled to release the power supply protection state into the sleep state. In the case where the detected power amount does not change from being less than or equal to the first threshold (T1) to being greater than the second threshold (T2), the three power supply units still maintain the power supply protection state.
For example, the first threshold and the second threshold may be set according to a charging/discharging curve of the lithium battery. For example, the first threshold and the second threshold may be set to ensure that the master control unit waits for a sufficient time in the ultra-low power consumption mode in S22 (this embodiment may be selected as 1 year). The ultra-low power consumption mode of the main control unit in the S22 is not more than 10 uA.
According to an embodiment of the invention, the method further comprises:
s40, when the sleep state is entered for a predetermined time or when the wake-up signal is received after the sleep state is entered, the three power supply units enter a running power supply state, and at this time, the main control power supply unit, the secondary power supply unit, and the tertiary power supply unit are all in a running mode.
For S21, the main control power supply unit and the secondary power supply unit are both in a low power consumption mode, so that the system can be conveniently awakened. For S22, the system enters a power protection state, and only the battery power can be periodically waken up and detected, and other functions cannot be completed, so as to ensure that the power consumption is extremely low.
According to one embodiment of the invention, the second threshold is greater than the first threshold by a predetermined amount.
For example, taking the first threshold T1 of 2.9V and the second threshold T2 of 3.1V as an example, the predetermined amount may be 0.2V, so that frequent switching of the device between the power supply protection and release states due to unstable solar panel voltage may be avoided.
In addition, when the solar panel voltage is present, the solar panel 60 supplies power to the main control power supply unit 30, the secondary power supply unit 40, and the tertiary power supply unit 50 through the current limiting protection unit 10, and simultaneously charges the energy storage device 70;
when there is no solar panel voltage, the energy storage device 70 supplies power to the main control power supply unit 30, the secondary power supply unit 40, and the tertiary power supply unit 50.
The method described in fig. 2 corresponds to the system described in fig. 1, and for a specific example, reference may be made to the description about fig. 1, which is not described herein again.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A secure power supply system suitable for ultra-low power consumption applications, characterized in that the system comprises a main control unit (20), a main control power supply unit (30), a secondary power supply unit (40), a tertiary power supply unit (50) and an energy storage unit (70), the energy storage unit (70) is used for supplying power to the main control power supply unit (30), the secondary power supply unit (40) and the tertiary power supply unit (50), the main control power supply unit (30) is a long power supply unit, the secondary power supply unit (40) and the tertiary power supply unit (50) are turn-off power supply units, wherein,
the main control unit (20) is used for monitoring the electric quantity of the energy storage unit (70), comparing the monitored electric quantity with a first threshold value, and controlling the respective power supply modes of the main control power supply unit (30), the secondary power supply unit (40) and the tertiary power supply unit (50) according to the comparison result.
2. The power supply system according to claim 1, wherein the master control unit (20) controls respective operation modes of the master control power supply unit (30), the secondary power supply unit (40), and the tertiary power supply unit (50) according to the comparison result, including:
under the condition that the monitored electric quantity is larger than the first threshold value according to the comparison result, the main control unit (20) controls the three power supply units to enter a sleep state, at the moment, the main control power supply unit (30) and the secondary power supply unit (40) are both in a low power consumption mode, and the tertiary power supply unit (50) is in a turn-off mode;
and under the condition that the monitored electric quantity is less than or equal to the first threshold value as a comparison result, the main control unit (20) controls the three power supply units to enter a power supply protection state, at the moment, the main control power supply unit (30) is in an ultra-low power consumption mode, and the secondary power supply unit (40) and the tertiary power supply unit (50) are both in a turn-off mode.
3. The power supply system according to claim 2, wherein the main control unit (20) is further configured to control the three power supply units to release the power supply protection state into a sleep state when the detected power amount changes from being less than or equal to the first threshold to being greater than a second threshold, wherein the main control power supply unit (30) and the secondary power supply unit (40) are both in a low power consumption mode, and the tertiary power supply unit (50) is in an off mode, and wherein the second threshold is greater than the first threshold.
4. The power supply system according to claim 2 or 3, wherein the three power supply units enter an operational power supply state when entering the sleep state for a predetermined time or when receiving a wake-up signal after entering the sleep state, and the main control power supply unit (30), the secondary power supply unit (40), and the tertiary power supply unit (50) are all in an operational mode.
5. Power supply system according to claim 4, characterized in that the system further comprises a solar panel (60) and a current limiting protection unit (10), wherein,
when the solar panel voltage exists, the solar panel (60) supplies power to the main control power supply unit (30), the secondary power supply unit (40) and the tertiary power supply unit (50) through the current limiting protection unit (10) and charges the energy storage device (70);
when the solar panel voltage does not exist, the energy storage device (70) supplies power for the main control power supply unit (30), the secondary power supply unit (40) and the tertiary power supply unit (50).
6. A method for providing power safely for ultra-low power applications, the method comprising:
the method comprises the steps that a main control unit monitors the electric quantity of an energy storage unit, wherein the energy storage unit supplies power to a main control power supply unit, a secondary power supply unit and a tertiary power supply unit, the main control power supply unit is a long power supply unit, and the secondary power supply unit and the tertiary power supply unit are power supply units which can be turned off;
the main control unit compares the monitored electric quantity with a first threshold value;
and the main control unit controls the respective power supply modes of the main control power supply unit, the secondary power supply unit and the tertiary power supply unit according to the comparison result.
7. The power supply method according to claim 6, wherein the controlling, by the main control unit, respective operating modes of the main control power supply unit, the secondary power supply unit, and the tertiary power supply unit according to the comparison result comprises:
controlling the three power supply units to enter a dormant state under the condition that the monitored electric quantity is greater than the first threshold value according to the comparison result, wherein the main control power supply unit and the secondary power supply unit are both in a low power consumption mode, and the tertiary power supply unit is in a turn-off mode;
and under the condition that the monitored electric quantity is less than or equal to the first threshold value as a comparison result, controlling the three power supply units to enter a power supply protection state, wherein the main control power supply unit is in an ultra-low power consumption mode, and the secondary power supply unit and the tertiary power supply unit are both in a turn-off mode.
8. The method of supplying power of claim 7, further comprising:
the main control unit controls the three power supply units to release a power supply protection state to enter a dormant state when the detected electric quantity is changed from being smaller than or equal to the first threshold value to being larger than a second threshold value, at the moment, the main control power supply unit and the secondary power supply unit are both in a low power consumption mode, the tertiary power supply unit is in a turn-off mode, and the second threshold value is larger than the first threshold value.
9. The power supply method according to claim 7 or 8, characterized in that the method further comprises:
when the power supply unit enters the sleep state for a preset time or receives a wake-up signal after entering the sleep state, the three power supply units enter the running power supply state, and at the moment, the main control power supply unit, the secondary power supply unit and the tertiary power supply unit are all in a running mode.
10. The power supply method according to claim 9, wherein the second threshold value is larger than the first threshold value by a predetermined amount.
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