CN117578698B - Dual-power management device - Google Patents
Dual-power management device Download PDFInfo
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- CN117578698B CN117578698B CN202410060190.XA CN202410060190A CN117578698B CN 117578698 B CN117578698 B CN 117578698B CN 202410060190 A CN202410060190 A CN 202410060190A CN 117578698 B CN117578698 B CN 117578698B
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 116
- 238000001514 detection method Methods 0.000 claims abstract description 49
- 230000009977 dual effect Effects 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims description 35
- 238000001914 filtration Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 230000001960 triggered effect Effects 0.000 claims description 3
- 238000007726 management method Methods 0.000 description 27
- 230000002159 abnormal effect Effects 0.000 description 11
- 230000001965 increasing effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000013500 data storage Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
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- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Dc-Dc Converters (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention discloses a dual power management device, wherein the dual power management device is provided with a battery and an alternating voltage access terminal, and comprises: the first voltage conversion device is used for converting the alternating voltage into voltage and outputting a power supply voltage; the second voltage conversion device is used for carrying out step-up/step-down conversion on the direct-current voltage and then outputting a power supply voltage; voltage detecting means for detecting an alternating voltage and outputting an alternating voltage detection signal; the switching device is used for controlling the switching device to conduct a passage between the output end of the first voltage conversion device and the power end connection of the load or conduct a passage between the output end of the second voltage conversion device and the power end connection of the load according to the alternating voltage detection signal. The invention aims to improve the stability of the load supply voltage.
Description
Technical Field
The invention relates to the technical field of power management, in particular to a dual-power management device.
Background
With the increasing variety of intelligent home appliances, at present, many intelligent home appliances establish communication connection with a whole house intelligent home system and have a data storage function. Under the condition of abnormal mains supply, normal operation of the equipment cannot be continuously ensured. In addition, in the face of sudden power anomalies, this typically results in loss of stored data for the smart home device. For example: unexpected power failure of the refrigerator can cause loss of user application data such as food storage freshness, storage period, personalized data of different freezing areas and the like; unexpected power failure of the intelligent closestool can cause loss of preference setting data of different users; unexpected outage of the intelligent desk lamp can cause dimming data loss of a user and the like. Unexpected outage can cause household electrical appliances to use data loss, reduces user experience degree and equipment reliability.
Disclosure of Invention
The invention mainly aims to provide a dual-power management device which aims to improve the stability of load power supply voltage.
In order to achieve the above object, the present invention provides a dual power management device, which has a battery and an ac voltage access terminal, the dual power management device comprising:
The input end of the first voltage conversion device is connected with the alternating voltage access end, and the output end of the first voltage conversion device is connected with the input end of the battery; the first voltage conversion device is used for converting the alternating voltage into voltage and outputting a power supply voltage;
the input end of the second voltage conversion device is connected with the output end of the battery; the second voltage conversion device is used for carrying out step-up/step-down conversion on the direct-current voltage and then outputting a supply voltage;
the input end of the voltage detection device is connected with the alternating voltage access end, and the voltage detection device is used for detecting alternating voltage and outputting an alternating voltage detection signal;
the first input end of the switching device is connected with the output end of the first voltage conversion device, the second input end of the switching device is connected with the output end of the second voltage conversion device, and the output end of the switching device is connected with the power end of the load;
the main control device is connected with the controlled end of the switch device, and the input end of the main control device is connected with the output end of the voltage detection device; the main control device is used for controlling the switching device to conduct a passage between the output end of the first voltage conversion device and the power end connection of the load or conduct a passage between the output end of the second voltage conversion device and the power end connection of the load according to the alternating voltage detection signal.
Preferably, the first voltage conversion device includes:
The input end of the protection circuit is connected with the alternating voltage access end, and the protection circuit is used for limiting the current flowing through the protection circuit to be below a preset threshold current;
the input end of the first voltage conversion circuit is connected with the output end of the first protection circuit, the output end of the first voltage conversion circuit is connected with the battery and the switching device, and the first voltage conversion circuit is used for carrying out voltage conversion on the alternating voltage and then outputting the power supply voltage;
The first protection circuit is connected in series with the alternating voltage access end and the path of the first voltage conversion circuit.
Preferably, the first voltage conversion device further includes a first filter circuit, an input end of the first filter circuit is electrically connected to an output end of the first protection circuit, an output end of the first filter circuit is connected to an input end of the first voltage conversion circuit, and the filter circuit is configured to filter the ac voltage and output the filtered ac voltage.
Preferably, the second voltage conversion device includes:
The input end of the second protection circuit is connected with the output end of the battery, and the second protection circuit is used for limiting the current flowing through the second protection circuit to be below a preset threshold current;
The input end of the second voltage conversion circuit is connected with the output end of the second protection circuit, the output end of the second voltage conversion circuit is connected with the switching device, and the second voltage conversion circuit is used for carrying out step-up/step-down conversion on the direct-current voltage and then outputting the power supply voltage;
the second protection circuit is connected in series with the battery output end and the path of the second voltage conversion circuit.
Preferably, the second voltage conversion device further includes a second filter circuit, an input end of the second filter circuit is electrically connected to an output end of the second protection circuit, an output end of the second filter circuit is connected to an input end of the second voltage conversion circuit, and the second filter circuit is configured to output the dc voltage after the filtering process.
Preferably, the voltage detection device is a voltage detection circuit, and the voltage detection circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor; the first capacitor, the second capacitor and the third capacitor; an operational amplifier;
The first end of the first resistor is electrically connected with the positive electrode input end, and the second end of the first resistor is electrically connected with the first end of the third resistor and the first end of the first capacitor; the first end of the second resistor is electrically connected with the negative electrode access end, and the second end of the second resistor is electrically connected with the first end of the fourth resistor and the second end of the second capacitor; the second end of the third resistor is electrically connected with the second end of the fifth resistor and the non-inverting input end of the operational amplifier; the second end of the fourth resistor is electrically connected with the first end of the sixth resistor and the inverting input end of the operational amplifier; the first end of the fifth resistor is electrically connected with the power supply end; the second end of the first capacitor is electrically connected with the first end of the second capacitor and the grounding end; the output end of the operational amplifier is electrically connected with the second end of the sixth resistor and the first end of the seventh resistor; the second end of the seventh resistor is electrically connected with the first end of the third capacitor and the input end of the main control device; the second end of the third capacitor is connected with the grounding end.
Preferably, the dual power management device further comprises a prompt circuit, wherein the input end of the prompt circuit is electrically connected with the output end of the main control device, and the prompt circuit is used for outputting different prompt signals according to the control signals output by the main control device.
Preferably, the dual power management device further comprises a trigger device, and the trigger device is electrically connected with the input end of the main control device; the triggering device is used for outputting a corresponding power supply selection signal when triggered.
The technical scheme of the invention is that the double-power management device is adopted, and the double-power management device is provided with a battery and an alternating-current voltage access terminal. The dual-power management device is provided with a battery, a battery output end connected with the battery output end and an alternating voltage access end, so that a load can have direct-current voltage power supply and alternating-current voltage power supply at the same time. And the alternating voltage charges the battery through the first voltage conversion device under the normal power supply state, so as to ensure that the battery electric quantity is in a full state when the battery is required to be used. When the alternating voltage is abnormal, the voltage detection circuit detects the alternating voltage input and outputs an alternating voltage detection signal to the main control device, so that the main control device controls the switching device to disconnect a passage between the first voltage conversion device and the load and connect a passage between the second voltage conversion device and the load, thereby realizing the switching between direct voltage power supply and alternating voltage power supply and effectively guaranteeing the power supply requirement of the load.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a dual power management device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a dual power management device according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a dual power management device according to another embodiment of the present invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
With the increasing variety of intelligent home appliances, at present, many intelligent home appliances establish communication connection with a whole house intelligent home system and have a data storage function. Under the condition of abnormal mains supply, normal operation of the equipment cannot be continuously ensured. In addition, in the face of sudden power anomalies, this typically results in loss of stored data for the smart home device. For example: unexpected power failure of the refrigerator can cause loss of user application data such as food storage freshness, storage period, personalized data of different freezing areas and the like; unexpected power failure of the intelligent closestool can cause loss of preference setting data of different users; unexpected outage of the intelligent desk lamp can cause dimming data loss of a user and the like. Unexpected outage can cause household electrical appliances to use data loss, reduces user experience degree and equipment reliability.
To this end, referring to fig. 1, the present invention proposes a dual power management device having a battery 10, an ac voltage access terminal, the dual power management device comprising:
The input end of the first voltage conversion device 20 is connected with the alternating voltage access end, and the output end of the first voltage conversion device 20 is connected with the input end of the battery; the first voltage conversion device 20 is configured to perform voltage conversion on an ac voltage and output a supply voltage;
The input end of the second voltage conversion device 30 is connected with the output end of the battery; the second voltage conversion device 30 is configured to boost/buck convert a dc voltage and output a supply voltage;
The input end of the voltage detection device 40 is connected with the alternating voltage access end, and the voltage detection device 40 is used for detecting alternating voltage and outputting an alternating voltage detection signal;
A first input terminal of the switching device 50 is connected to the output terminal of the first voltage conversion device 20, a second input terminal of the switching device 50 is connected to the output terminal of the second voltage conversion device 30, and the output terminal of the switching device 50 is connected to a power supply terminal of a load;
The main control device 60, the main control device 60 is connected with the controlled end of the switch device 50, and the input end of the main control device 60 is connected with the output end of the voltage detection device 40; the main control device 60 is configured to control the switching device to conduct a path between the output terminal of the first voltage conversion device 20 and the power terminal connection of the load or conduct a path between the output terminal of the second voltage conversion device 30 and the power terminal connection of the load according to the ac voltage detection signal.
It will be appreciated that in many smart appliances where relevant data is stored, no secondary power source is provided for the time and time required. When the mains supply is abnormal, the data stored in the intelligent household appliance can be lost. Therefore, the problem can be effectively solved by adding the dual power management device with the battery 10 set in the intelligent household appliance. In the case of the battery 10, different types of batteries 10 may be selected according to different smart home appliances. Specifically, the battery 10 may be composed of at least one cell, which may be implemented using a lithium cell, a nickel-hydrogen cell, or the like. And the proper battery 10 is selected according to the difference of different intelligent household appliances on power supply requirements, so that the intelligent household appliances can provide power supply voltage for the intelligent household appliances for a certain period of time in the state of abnormal mains supply.
The first voltage conversion device 20 may be implemented by a rectifying circuit and an AC/DC voltage conversion circuit, i.e. an AC/DC voltage converter, according to practical application. Specifically, an AC/DC voltage converter is taken as an example. When the power supply voltage required by the load is direct current voltage and the power supply voltage is alternating current voltage, the AC/DC voltage converter can output the input alternating current voltage as direct current voltage according to a required preset value. If the input AC/DC voltage converter has an AC voltage of 220V, the AC/DC voltage converter can convert the input 220V AC voltage into a 12V DC voltage through an internal circuit and output the same. When the first voltage conversion device 20 is provided with an input of alternating voltage, the alternating voltage can be converted into direct voltage required by a load according to actual conditions so as to meet the power supply requirement of the load. In addition, the first voltage conversion device 20 may also convert the ac voltage into the dc voltage and charge the battery 10 according to the actual situation when the ac voltage is input, so as to ensure that the electric quantity inside the battery 10 is in a full-charge state when the ac voltage is input normally, so that the battery 10 ensures a period of time for supplying power to the load in a state when the ac voltage is input abnormally.
In the present embodiment, the second voltage conversion device 30 may be implemented with a step-up DC/DC converter, a step-down DC/DC converter, a step-up DC/DC converter, a BUCK circuit, or the like according to the actual application scenario. Specifically, a step-down DC/DC converter is taken as an example. When the direct current voltage is input to the step-down DC/DC converter, the input direct current voltage is subjected to step-down processing according to a preset step-down value. If the direct current voltage input into the buck type DC/DC converter is 24V, and the connected load needs 12V direct current voltage, the buck type DC/DC converter can convert the input 24V direct current voltage into 12V direct current voltage through an internal circuit and output the 12V direct current voltage. The second voltage conversion device 30 can convert the direct voltage into the direct voltage required by the load according to the actual situation when the direct voltage is input, so as to meet the power supply requirement of the load. The input terminal of the second voltage conversion device 30 is connected to the battery output terminal, and the dc voltage connected to the dc voltage input terminal is the dc supply voltage output by the battery 10.
Alternatively, referring to fig. 3, the voltage detection device 40 may be implemented with a voltage detection circuit (e.g., a resistor-divider detection circuit, a linear operational amplifier OP voltage detection circuit 40), a voltage detection sensor, or the like. Specifically, the voltage detection device is a voltage detection circuit 40, and the voltage detection circuit 40 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7; a first capacitor C1, a second capacitor C2, and a third capacitor C3; an operational amplifier OP;
The first end of the first resistor R1 is electrically connected with the positive electrode input end, and the second end of the first resistor R1 is electrically connected with the first end of the third resistor R3 and the first end of the first capacitor C1; the first end of the second resistor R2 is electrically connected with the negative electrode access end, and the second end of the second resistor R2 is electrically connected with the first end of the fourth resistor R4 and the second end of the second capacitor C2; the second end of the third resistor R3 is electrically connected with the second end of the fifth resistor R5 and the non-inverting input end of the operational amplifier OP; the second end of the fourth resistor R4 is electrically connected with the first end of the sixth resistor R6 and the inverting input end of the operational amplifier OP; the first end of the fifth resistor R5 is electrically connected with the power supply end; the second end of the first capacitor C1 is electrically connected with the first end of the second capacitor C2 and the grounding end; the output end of the operational amplifier OP is electrically connected with the second end of the sixth resistor R6 and the first end of the seventh resistor R7; the second end of the seventh resistor R7 is electrically connected to the first end of the third capacitor C3 and the input end of the main control device 60; the second end of the third capacitor C3 is connected with the ground end.
It can be appreciated that the rectifier bridge diode is greatly affected by the ambient temperature in the conventional voltage detection circuit, thereby causing a problem of low detection accuracy. Therefore, the differential operation module is configured by using the operational amplifier OP, etc. to perform differential detection on the input voltage, thereby realizing detection on the input of the ac voltage, and outputting an ac voltage detection signal to the main control device 60, so as to realize that the main control device 60 performs the related action.
In the present embodiment, the switching device 50 may be implemented by a switching circuit, a relay, or the like according to the actual application scenario. Specifically, a relay is taken as an example. The switching device 50 may be provided with two sets of relays, a first relay and a second relay, respectively. The input ends of the first relay and the second relay are respectively connected with the output ends of the first voltage conversion device 20 and the second voltage conversion device 30, and the output ends are connected with the power supply end of the load. The switching device 50 is provided with two sets of relays to switch on or off the paths between the first voltage conversion circuit 23, the second voltage conversion circuit 33 and the power source terminal connection of the switch.
In this embodiment, the main control device 60 may be implemented by an MCU (Microcontroller Unit, micro control unit), a DSP (DIGITAL SIGNAL Process, digital signal processing Chip), an FPGA (Field Programmable GATE ARRAY, programmable gate array Chip), an SOC (System On Chip), or the like. Specifically, when the mains supply is normal, the voltage detection device performs voltage detection on the ac voltage input by the ac voltage access terminal, and outputs a voltage detection signal. The main control device 60 receives the ac voltage detection signal and determines that the ac voltage input by the ac voltage access terminal is normal, and controls the switching device 50 to conduct the path between the first voltage conversion device 20 and the load, so as to achieve the technical effect that the ac voltage provides the supply voltage. When the mains supply is abnormal, the voltage detection device detects the voltage of the alternating voltage input by the alternating voltage access terminal and outputs a voltage detection signal. The main control device 60 receives the ac voltage detection signal and determines that the ac voltage input by the ac voltage access terminal is abnormal, and controls the switching device 50 to disconnect the path between the first voltage conversion device 20 and the load, and controls the switching device 50 to conduct the path between the second voltage conversion device 30 and the load. Thereby realizing the technical effect of switching between the alternating voltage power supply and the direct voltage power supply. When the ac voltage detection signal outputted by the voltage detection circuit 40 is normal as detected by the main control device 60, the control switch device 50 is controlled to turn on the path between the first voltage conversion device 20 and the load again, and to disconnect the path between the second voltage conversion device 30 and the load, so as to supply the ac voltage to the load and supplement the power to the battery 10.
In this embodiment, the dual power management device is provided with the battery 10 and the ac voltage access terminal, so that the load can have both dc voltage supply and ac voltage supply. The battery 10 is charged by the first voltage conversion device 20 in a normal power supply state, so as to ensure that the electric quantity of the battery 10 is in a full state when the battery 10 needs to be used. When the ac voltage is abnormal, the voltage detection circuit 40 detects the ac voltage input and outputs an ac voltage detection signal to the main control device 60, so that the main control device 60 controls the switching device 50 to disconnect the path between the first voltage conversion device 20 and the load and connect the path between the second voltage conversion device 30 and the load, thereby realizing the switching between the dc voltage power supply and the ac voltage power supply and effectively guaranteeing the power supply requirement of the load.
Referring to fig. 2, in an embodiment of the present invention, the first voltage conversion device 20 includes:
The input end of the first protection circuit 21 is connected with the alternating voltage access end, and the first protection circuit 21 is used for limiting the current flowing through the first protection circuit 21 to be below a preset threshold current;
The input end of the first voltage conversion circuit 22 is connected with the output end of the first protection circuit 22, the output end of the first voltage conversion circuit 22 is connected with the battery 10 and the switching device 50, and the first voltage conversion circuit 22 is used for performing voltage conversion on the alternating voltage and then outputting the power supply voltage;
The first protection circuit 21 is connected in series to the ac voltage access terminal and the path of the first voltage conversion circuit.
The first voltage conversion device 20 further includes a first filter circuit 23, an input end of the first filter circuit 23 is electrically connected to an output end of the first protection circuit 21, an output end of the first filter circuit 23 is connected to an input end of the first voltage conversion circuit 22, and the filter circuit is configured to output the ac voltage after the filtering process.
In this embodiment, to ensure the safety of the first voltage conversion device 20 when the ac voltage is applied, a first protection circuit 21 may be added to the first voltage conversion device 20 to improve the safety of the circuit. The first protection circuit 21 may be implemented by a current limiting circuit, a fuse, or the like. Specifically, taking a fuse as an example, when a circuit malfunctions or is abnormal, the current is increased continuously, and the increased current may damage some important devices in the circuit, and may burn out the circuit or even cause a fire. If the fuse is correctly arranged in the circuit, the fuse can be automatically fused to cut off the current when the current is abnormally increased to a certain height and heat, so that the function of protecting the safe operation of the circuit is achieved. The safety of the first voltage converting apparatus 20 is improved by setting the first protection circuit 21 to limit the input dc current to be less than or equal to a preset threshold current, i.e., a safety current.
Alternatively, the first filter circuit 23 may be implemented as a capacitive filter circuit, which mainly filters noise and noise contained in the input ac voltage and smoothes it into a stable ac voltage output. Specifically, the capacitor filter circuit filters the characteristics of the current by using a capacitor, that is, the capacitor can form a lower impedance for an ac signal with a lower frequency so as to pass the ac signal, and form a higher impedance for high-frequency noise so as to filter the ac signal. The capacitor filter circuit is generally composed of a capacitor and a resistor, wherein the capacity of the capacitor determines the filtering effect of the filter, and the resistor is used for limiting the charge and discharge current of the capacitor so as to ensure the stability and reliability of the filter circuit. In practical applications, the capacity selection of the capacitive filter circuit needs to be adjusted according to specific circuit requirements, and a larger capacitor is generally adopted to achieve a better filtering effect.
Alternatively, the first voltage conversion circuit 22 may be implemented using an AC/DC voltage conversion circuit, a rectifying circuit, or the like. The input end of the first voltage conversion circuit 22 is configured to receive the ac power filtered by the first filter circuit 23, invert the filtered ac power, convert the input ac power into dc power, and output the dc power. Specifically, taking an AC/DC voltage converter as an example, when the AC voltage inputted after filtering is 220V, a DC voltage of 12V can be outputted after the AC/DC voltage converter is inverted, so as to meet the power supply requirement of the load and the charging requirement of the battery 10.
Referring to fig. 2, in an embodiment of the present invention, the second voltage conversion device 30 includes:
A second protection circuit 31, wherein an input end of the second protection circuit 31 is connected with the output end of the battery, and the second protection circuit 31 is used for limiting the current flowing through the second protection circuit to be below a preset threshold current;
The input end of the second voltage conversion circuit 32 is connected with the output end of the second protection circuit, the output end of the second voltage conversion circuit 32 is connected with the switching device 50, and the second voltage conversion circuit 32 is used for performing step-up/step-down conversion on the direct current voltage and then outputting the power supply voltage;
Wherein the second protection circuit 31 is connected in series to the battery output terminal and the path of the second voltage conversion circuit 32.
The second voltage conversion device 30 further includes a second filter circuit 33, an input end of the second filter circuit 33 is electrically connected to an output end of the second protection circuit 31, an output end of the second filter circuit 33 is connected to an input end of the second voltage conversion circuit 32, and the second filter circuit 33 is configured to output the dc voltage after the filtering process.
In this embodiment, for safety during direct current voltage connection, a second protection circuit 31 may be added to the second voltage conversion device 30 to improve the safety of the circuit. The first voltage protection circuit can be realized by adopting a current limiting circuit, a fuse and the like. Specifically, taking a fuse as an example, when a circuit malfunctions or is abnormal, the current is increased continuously, and the increased current may damage some important devices in the circuit, and may burn out the circuit or even cause a fire. If the fuse is correctly arranged in the circuit, the fuse can be automatically fused to cut off the current when the current is abnormally increased to a certain height and heat, so that the function of protecting the safe operation of the circuit is achieved. The second protection circuit 31 is provided to limit the input dc current to a preset threshold current, i.e., a safety current or less, so as to improve the safety of the second voltage conversion device 30.
In this embodiment, the second filter circuit 33 can be implemented as a dc filter circuit, and is mainly used for filtering noise and noise contained in the dc voltage output from the power supply, and smoothing the noise and noise into a stable dc voltage output. Among them, capacitive, inductive, resistive, and other elements are commonly used. Specifically, when the dc voltage is connected to the battery 10, the second filter circuit 33 reduces the ripple voltage in the dc voltage, so as to facilitate the voltage conversion of the subsequent dc voltage.
In this embodiment, the second voltage conversion circuit 32 may be implemented by a step-down circuit (the average value of the output voltage is always lower than the average value of the input voltage), a step-up/step-down circuit (the average value of the output voltage is both lower and higher than the average value of the input voltage), a step-up circuit (the average value of the output voltage is always higher than the average value of the input voltage), a hill circuit (the step-up/step-down circuit with continuous input and output currents and small harmonic components), etc. according to the practical application. The input end of the second voltage conversion circuit 32 receives the dc voltage processed by the second filter circuit 33, and outputs the processed dc voltage after step-up/step-down conversion. Specifically, taking a step-down circuit as an example, when the connected dc voltage is 24V, the second filter circuit 33 processes the dc voltage, and then the step-down circuit steps down the connected dc voltage to 12V to meet the load input voltage requirement.
In an embodiment of the present invention, the dual power management device further includes a prompting circuit, an input end of the prompting circuit is electrically connected to an output end of the main control device 60, and the prompting circuit is configured to output different prompting signals according to the control signal output by the main control device 60.
Specifically, when the main control device 60 in the dual power management device is in the green light prompt, it is indicated that the input of the alternating voltage in the dual power management device is normal; when the main control device 60 in the dual power management device is in the red light prompt, the dual power management device is in the state of direct current power supply of the battery 10. If the main control device 60 does not have the lighting prompt, it indicates that the battery 10 of the dual power management device is in an abnormal state in both dc power supply and ac power supply, and the dual power management device does not output the power supply voltage at this time.
In an embodiment of the present invention, the dual power management device further includes a triggering device, and the triggering device is electrically connected to the input end of the main control device 60; the triggering device is used for outputting a corresponding power supply selection signal when triggered.
In this embodiment, the triggering device may be implemented by a key, a knob, a virtual key, a touchable screen, a toggle switch, or the like. The user can realize the manual control of the switching of the voltage output of the dual-power management device through the triggering device. For example, when the user needs to disconnect the supply of the ac power supply, the user can manually control the trigger device to output the power supply selection signal to the main control device 60, and then the main control device 60 outputs the corresponding control signal to switch the power supply voltage of the load from the ac voltage supply to the dc voltage supply. In addition, when the automatic switching of the power supply voltage of the main control device 60 fails, the switching of the power supply voltage may be realized by the trigger device.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (5)
1. A dual power management device having a battery, an ac voltage access terminal, the dual power management device comprising:
The input end of the first voltage conversion device is connected with the alternating voltage access end, and the output end of the first voltage conversion device is connected with the input end of the battery; the first voltage conversion device is used for converting the alternating voltage into voltage and outputting a power supply voltage;
the input end of the second voltage conversion device is connected with the output end of the battery; the second voltage conversion device is used for carrying out step-up/step-down conversion on the direct-current voltage and then outputting a supply voltage;
the input end of the voltage detection device is connected with the alternating voltage access end, and the voltage detection device is used for detecting alternating voltage and outputting an alternating voltage detection signal;
the first input end of the switching device is connected with the output end of the first voltage conversion device, the second input end of the switching device is connected with the output end of the second voltage conversion device, and the output end of the switching device is connected with the power end of the load;
The main control device is connected with the controlled end of the switch device, and the input end of the main control device is connected with the output end of the voltage detection device; the main control device is used for controlling the switching device to conduct a passage between the output end of the first voltage conversion device and the power end connection of the load or conduct a passage between the output end of the second voltage conversion device and the power end connection of the load according to the alternating voltage detection signal;
wherein the first voltage conversion device includes:
the input end of the first protection circuit is connected with the alternating voltage access end, and the first protection circuit is used for limiting the current flowing through the first protection circuit to be below a preset threshold current;
the input end of the first voltage conversion circuit is connected with the output end of the first protection circuit, the output end of the first voltage conversion circuit is connected with the battery and the switching device, and the first voltage conversion circuit is used for carrying out voltage conversion on the alternating voltage and then outputting the power supply voltage;
The first protection circuit is connected in series with the alternating voltage access end and the path of the first voltage conversion circuit;
The second voltage conversion device includes:
The input end of the second protection circuit is connected with the output end of the battery, and the second protection circuit is used for limiting the current flowing through the second protection circuit to be below a preset threshold current;
The input end of the second voltage conversion circuit is connected with the output end of the second protection circuit, the output end of the second voltage conversion circuit is connected with the switching device, and the second voltage conversion circuit is used for carrying out step-up/step-down conversion on the direct-current voltage and then outputting the power supply voltage;
the second protection circuit is connected in series with the battery output end and the path of the second voltage conversion circuit;
The voltage detection device is a voltage detection circuit, and the voltage detection circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor; the first capacitor, the second capacitor and the third capacitor; an operational amplifier;
The first end of the first resistor is electrically connected with the positive electrode input end, and the second end of the first resistor is electrically connected with the first end of the third resistor and the first end of the first capacitor; the first end of the second resistor is electrically connected with the negative electrode access end, and the second end of the second resistor is electrically connected with the first end of the fourth resistor and the second end of the second capacitor; the second end of the third resistor is electrically connected with the second end of the fifth resistor and the non-inverting input end of the operational amplifier; the second end of the fourth resistor is electrically connected with the first end of the sixth resistor and the inverting input end of the operational amplifier; the first end of the fifth resistor is electrically connected with the power supply end; the second end of the first capacitor is electrically connected with the first end of the second capacitor and the grounding end; the output end of the operational amplifier is electrically connected with the second end of the sixth resistor and the first end of the seventh resistor; the second end of the seventh resistor is electrically connected with the first end of the third capacitor and the input end of the main control device; the second end of the third capacitor is connected with the grounding end.
2. The dual power management apparatus of claim 1, wherein the first voltage conversion apparatus further comprises a first filter circuit, an input terminal of the first filter circuit is electrically connected to an output terminal of the first protection circuit, an output terminal of the first filter circuit is connected to an input terminal of the first voltage conversion circuit, and the first filter circuit is configured to output the ac voltage after the filtering process.
3. The dual power management apparatus of claim 1, wherein the second voltage conversion apparatus further comprises a second filter circuit, an input terminal of the second filter circuit is electrically connected to an output terminal of the second protection circuit, an output terminal of the second filter circuit is connected to an input terminal of the second voltage conversion circuit, and the second filter circuit is configured to output the dc voltage after the filtering process.
4. The dual power management device of claim 1, further comprising a prompting circuit, wherein an input of the prompting circuit is electrically connected with an output of the master device, and the prompting circuit is configured to output different prompting signals according to a control signal output by the master device.
5. The dual power management device of claim 1, further comprising a triggering device electrically connected to an input of the master device; the triggering device is used for outputting a corresponding power supply selection signal when triggered.
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| CN117578698A (en) | 2024-02-20 |
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