CN112653231A - Backup power supply device and method for power terminal - Google Patents
Backup power supply device and method for power terminal Download PDFInfo
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- CN112653231A CN112653231A CN202011494982.6A CN202011494982A CN112653231A CN 112653231 A CN112653231 A CN 112653231A CN 202011494982 A CN202011494982 A CN 202011494982A CN 112653231 A CN112653231 A CN 112653231A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000002159 abnormal effect Effects 0.000 claims abstract description 23
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims description 30
- 238000007599 discharging Methods 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000007726 management method Methods 0.000 description 112
- 230000005856 abnormality Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 230000006641 stabilisation Effects 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- 238000001994 activation Methods 0.000 description 4
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- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 229910052987 metal hydride Inorganic materials 0.000 description 2
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- 208000032953 Device battery issue Diseases 0.000 description 1
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- 238000004590 computer program Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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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
- H02J9/061—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 DC 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention relates to a backup power supply device and a backup power supply method for a power terminal, wherein a battery management unit automatically carries out charge-discharge management and abnormal state monitoring on a backup battery through the backup battery, the battery management unit, a switch module and a connection interface, so that the normal work of the backup battery is ensured, and the service life of the battery is prolonged; the backup power supply device of the power terminal is connected with the power terminal through a necessary, standard and universal connection interface, when the power terminal is powered off, the backup power supply device of the power terminal can be switched in for supplying power immediately and seamlessly to ensure that the power terminal can work continuously after being powered off, even if a backup battery used by the power terminal is invalid, the backup power supply device of the power terminal is replaced, the power terminal can be reused, so that the client investment is reduced, the technical problem that the replacement of the backup battery of the existing power terminal is troublesome or cannot be replaced due to the limitation of the battery specification and the battery management circuit, and the terminal cannot be used normally is solved.
Description
Technical Field
The invention relates to the technical field of terminal power supply, in particular to a backup power supply device and method for a power terminal.
Background
The existing power communication control terminal generally requires a rechargeable battery for terminal backup in order to meet the operations of event reporting, data storage and the like after power failure, and the battery for terminal backup is replaceable in order to prevent terminal failure caused by battery failure in the service life of the terminal. Different terminals have different backup battery types, and corresponding battery management circuits are different. The existing terminal backup battery management circuit is arranged in a terminal and cannot be replaced, and terminal supply manufacturers are numerous, part of manufacturers log out during the operation of the terminal and cannot provide battery replacement service, so that part of terminal backup batteries are abnormal, and the function of a terminal part cannot be realized.
The power communication control terminal generally works in an outdoor environment, the temperature is between-40 ℃ and 70 ℃, normal working is required for more than ten years, and a nickel-hydrogen battery is generally selected as a battery for terminal backup in order to meet the requirements of the terminal working environment. The residual capacity of the nickel-metal hydride battery is not less than 60% of the nominal value after 500 times of the nominal charge-discharge cycle, the number of power failure times is far less than 500 times in the terminal use process, but the self-discharge speed of the nickel-metal hydride battery is high, the passivation is easy, most batteries on site cannot meet the requirement of the service life of the terminal, and the batteries of corresponding models need to be replaced. A battery management program and a charge-discharge circuit in the terminal are closely related to the specifications of the selected battery, the terminal can only replace the battery with the model specified by a terminal manufacturer after being installed on site, if the terminal manufacturer cannot normally operate or the battery stops production in the terminal operation period, the service of replacing the battery cannot be provided, so that the backup battery of part of the terminal is abnormal, and the function of the terminal part cannot be realized.
The principle of a battery management circuit of a backup terminal of the prior art is shown in fig. 3, a battery is installed in a battery compartment of the terminal and can be replaced without opening a terminal lead seal, the battery management circuit and a wake-up key are designed in the terminal, when an external power supply normally supplies power, the voltage of an input power supply is higher than that of an output power supply, and when the battery does not exist, the battery management circuit supplies power to a rear-stage circuit through a diode D3. Specifically, as shown in fig. 3, when the terminal is normally supplied with the external power source, the CPU of the battery management circuit determines the battery capacity by detecting the battery voltage, and when the battery capacity is insufficient, the CPU turns on the switch K1 to charge the battery through the diode D1; when the battery is sufficiently charged, the switch K2 is opened through the logic gate U1, and the battery supplies power to the rear-stage circuit through the diode D2 and the switch K2. Under normal conditions, the latter stage of the battery management circuit mainly consumes the power supplied by the input power through D3; when the external power supply can not provide the power supply of the rear-stage circuit for the terminal, which is generally caused by station power failure, the power supply of the rear-stage circuit is seamlessly switched to be provided by the battery, and the terminal can continue to work normally. And after the terminal finishes the work after power failure, closing the K2 and powering off the whole machine. Under the condition that the terminal stops working, if a key K3 is pressed, a switch K2 is turned on, the battery supplies power to the whole machine, the CPU keeps K2 turned on after starting, and the terminal enters a normal working state.
Disclosure of Invention
The embodiment of the invention provides a backup power supply device and method of a power terminal, which are used for solving the technical problem that the terminal cannot be normally used due to the fact that the replacement of a backup battery of the existing power terminal is troublesome or cannot be performed because of the limitation of the battery specification and a battery management circuit.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a backup power supply device of a power terminal comprises a battery management unit, a backup battery, a switch module and a connection interface, wherein the backup battery, the switch module and the connection interface are connected with the battery management unit; the first switch element is respectively connected with the charging control end of the battery management unit and the backup battery, the second switch element is respectively connected with the external discharging control end of the battery management unit, the backup battery and the power output interface, the third switch element is respectively connected with the key interface and the backup battery, the fourth switch element is respectively connected with the protection control end of the battery management unit and the backup battery, and the fifth switch element is respectively connected with the ground discharging control end of the battery management unit, the backup battery and the ground;
the battery management unit is used for controlling the charging and discharging of the backup battery and monitoring the state of the backup battery, and monitored data are reported through the communication interface.
Preferably, a temperature detection element for detecting the temperature of the backup battery is further connected between the battery management unit and the backup battery, and the temperature detection element is attached to the backup battery.
Preferably, a third semiconductor device is connected between the backup battery and the second switching element, and a third voltage stabilizing element is connected between the second switching element and the power output interface.
Preferably, a first semiconductor device and a second voltage stabilizing element are connected between the power input interface and the battery management unit.
Preferably, a cathode of the first semiconductor device is connected to the first switching element through a fourth voltage stabilization element.
Preferably, a second semiconductor device is further connected between the backup battery and the connection of the third switching element and the fourth switching element.
The invention also provides a backup power supply method of the power terminal, which is based on the backup power supply device of the power terminal and comprises the following steps:
s10, acquiring the power supply state of an external power supply of the power terminal, wherein the power supply state of the external power supply comprises normal power supply and power supply stop;
s20, according to the fact that the power supply state of an external power supply of the power terminal is in normal power supply, monitoring the shortage of electric quantity of a backup battery by a battery management unit, controlling a first switch element to be closed by the battery management unit, and charging the backup battery by the external power supply through a power supply output interface;
and S30, controlling the second switch element to be closed by adopting a battery management unit to output a power supply through a power supply output interface according to the fact that the power supply state of an external power supply of the power terminal is in a power supply stop state or a key interface is started, and supplying power to the power terminal.
Preferably, in step S30, if the battery management unit monitors that the backup battery is in an abnormal state, the battery management unit controls the second switch element to be turned off to turn off the discharge of the backup battery according to the fact that the external power supply of the power terminal is in a power supply stop state or a key interface is started; the backup battery is in an abnormal state and comprises battery over-discharge, over-charge, under-voltage and battery temperature exceeding a temperature threshold.
Preferably, when the battery management unit monitors that the backup battery is in an abnormal state, the battery management unit reports the monitored information that the backup battery is in the abnormal state through a communication interface.
Preferably, in step S30, the battery management unit controls the second switch element to be turned off and the backup battery to be discharged when the power output interface fails to be connected to the power terminal according to the fact that the power supply state of the external power source of the power terminal is stopped or the key interface is started.
According to the technical scheme, the embodiment of the invention has the following advantages: according to the backup power supply device and method of the power terminal, the battery management unit automatically carries out charge and discharge management and abnormal state monitoring on the backup battery through the backup battery, the battery management unit, the switch module and the connection interface, so that the normal work of the backup battery is ensured, and the service life of the battery is prolonged; the backup power supply device of the power terminal is connected with the power terminal through a necessary, standard and universal connection interface, when the power terminal is powered off, the backup power supply device of the power terminal can be switched in for supplying power immediately and seamlessly to ensure that the power terminal can work continuously after being powered off, even if a backup battery used by the power terminal is invalid, the backup power supply device of the power terminal is replaced, the power terminal can be reused, so that the client investment is reduced, the technical problem that the replacement of the backup battery of the existing power terminal is troublesome or cannot be replaced due to the limitation of the battery specification and the battery management circuit, and the terminal cannot be used normally is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a backup power supply device of an electric power terminal according to an embodiment of the present invention.
Fig. 2 is a flowchart illustrating steps of a backup power supply method for an electric power terminal according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a conventional terminal-backed battery management circuit.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The embodiment of the application provides a backup power supply device and method for an electric power terminal, and solves the technical problem that the terminal cannot be normally used due to the fact that the replacement of a backup battery of the existing electric power terminal is troublesome or cannot be performed due to the limitation of the battery specification and a battery management circuit.
The first embodiment is as follows:
fig. 1 is a schematic structural diagram of a backup power supply device of an electric power terminal according to an embodiment of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a backup power supply device for a power terminal, including a battery management unit U1, and a backup battery B1 connected to the battery management unit U1, a switch module, and a connection interface, where the connection interface includes a power input interface 1, a power output interface 2, a communication interface 3, and a key interface 4, and the switch module includes a first switch element K1, a second switch element K2, a third switch element K3, a fourth switch element K4, and a fifth switch element K5; the first switch element K1 is respectively connected with the charging control terminal of the battery management unit U1 and the backup battery B1, the second switch element K2 is respectively connected with the external discharging control terminal of the battery management unit U1, the backup battery B1 and the power output interface 2, the third switch element K3 is respectively connected with the key interface 4 and the backup battery B1, the fourth switch element K4 is respectively connected with the protection control terminal of the battery management unit U1 and the backup battery B1, and the fifth switch element K5 is respectively connected with the ground discharging control terminal of the battery management unit U1, the backup battery B1 and the ground;
and the battery management unit U1 is used for controlling the charging and discharging of the backup battery B1 and monitoring the state of the backup battery B1, and the monitored data are reported through the communication interface 3.
In the embodiment of the invention, the backup power supply device of the power terminal mainly comprises a backup battery, a battery management unit, a switch module and a connection interface, wherein the battery management unit automatically carries out charge-discharge management and abnormal state monitoring on the backup battery, so that the normal work of the backup battery is ensured, and the service life of the battery is prolonged; the backup power supply device of the power terminal is connected with the power terminal through a necessary, standard and universal connecting interface, when the power terminal is powered off, the backup power supply device of the power terminal is switched into power supply immediately and seamlessly, and continuous work of the power terminal after power failure is ensured. The backup power supply device of the power terminal is adopted, so that the inside of the power terminal does not need to contain an extra battery management circuit and a backup battery, the backup power supply device of the power terminal is only required to be connected into the power terminal, and the power terminal can be repeatedly utilized even if the backup battery used by the power terminal is invalid and replaced, so that the investment of customers is reduced.
In the embodiment of the present invention, the battery management unit U1 is mainly used to manage the operations of charging and discharging, activating, state monitoring, and the like of the backup battery B1.
It should be noted that the battery management unit U1 is mainly a battery management chip, and a pin connection end of the battery management chip includes a USB interface control end, a chip power supply control end, a keep-alive control end, a charging current sensing control end, a battery voltage sensing control end, a battery temperature sensing control end, a discharging current sensing control end, a ground discharging control end, and an external discharging control end. In this embodiment, the USB interface connection terminal of the battery management chip is mainly used for linking and communicating with the terminal. The chip power supply control end of the battery management chip is mainly used for inputting a power supply required by the work of the battery management chip; the keep-alive control end of the battery management chip is used for controlling the fourth switching element K4 to realize self-power supply of the battery management chip by the backup battery B1; the charging control end of the battery management chip is used for controlling a first switching element K1 for charging the backup battery B1; the charging current sensing control end of the battery management chip is used for measuring the charging current of the backup battery B1; the battery voltage sensing control end of the battery management chip is used for measuring the voltage of a backup battery B1; the battery temperature sensing control end of the battery management chip is used for measuring the surface temperature of the backup battery B1; the discharging current sensing control end of the battery management chip is used for measuring the external discharging current of the backup battery B1; the fifth switching element K5 is used for controlling the quick ground discharge of the backup battery B1 at the ground discharge control end of the battery management chip; the external discharge control end of the battery management chip is used for controlling the second switch element K2 of the backup battery B1 for supplying power to the outside. The battery management chip can be a single chip microcomputer.
In the embodiment of the present invention, the backup battery B1 may be an energy storage battery or a rechargeable battery.
In the embodiment of the invention, the first switch element K1 is mainly controlled by the charging control terminal of the battery management chip, and when the switch is closed, the external power supply charges the backup battery B1 through the power input interface 1; the second switch element K2 is controlled by the external discharge control end of the battery management chip, and outputs the segment element through the power output interface 2 when the switch element is closed; the third switch element K3 is controlled by the key interface 4, and the backup battery B1 supplies power to the battery management chip when the third switch element K3 is closed; the fourth switching element K4 is controlled by a keep-alive control end of the battery management chip, and a backup battery B1 supplies power to the battery management chip when the battery management chip is closed; the fifth switching element K5 is controlled by the ground discharge control terminal of the battery management chip, and when closed, the backup battery B1 discharges quickly to the ground for activating the backup battery B1.
The first switching element K1, the second switching element K2, the third switching element K3, the fourth switching element K4, and the fifth switching element K5 may be transistors, or may be switching devices such as MOS transistors that control on/off operations.
In the embodiment of the invention, the power input interface 1 is mainly a standard power supply provided by the power terminal, and when an external power supply of the power terminal normally works, the input voltage value of the power input interface 1 is 12V; when an external power supply of the power terminal stops working, the input voltage value of the power input interface 1 is 0V; the power supply provided to the power terminals is primarily powered by the battery management unit U1 operating and the backup battery B1.
In the embodiment of the present invention, the power output interface 2 is mainly a standard power supply externally output by the backup battery B1, and the output voltage value is 5V; when the external power supply of the power terminal stops working, the power supply output by the power output interface 2 is seamlessly switched into the power terminal, so that the power terminal is ensured to continuously work after power failure.
Note that the power output interface 2 is connected to an input terminal of the power terminal.
In the embodiment of the present invention, the communication interface 3 is mainly used for operating the power terminal in the HOST mode, the battery management unit of the backup power supply DEVICE of the power terminal is in the DEVICE mode, the power terminal is connected and communicates with the backup power supply DEVICE of the power terminal through the USB, and the management of the backup power supply DEVICE of the power terminal and the state monitoring of the backup battery B1 by the power terminal are mainly facilitated.
The communication interface 3 adopts a USB interface, and the backup power supply device of the power terminal adopts a USB as a communication connection, so that the communication connection has the advantages of unified standards, plug and play, and the like. In other embodiments, it is not excluded that similar functionality may be implemented with other communication means such as UART, I2C, etc.
In the embodiment of the invention, the key interface 4 drives the wake-up power management unit U1 to operate mainly when the external power supply of the power terminal stops operating, the second switch element K2 is closed and outputs the standard power supply through the power output interface 2, so that the power terminal is powered and started through the backup battery B1.
It should be noted that, in the power-off state of the power terminal, the key interface 4 uses a mechanical key to trigger and wake up the backup battery B1 to supply power to the power terminal. In other embodiments, the key interface 4 may also be configured to perform similar functions by sensing light with a photosensitive device, sensing temperature with a thermosensitive device, and the like.
According to the backup power supply device of the power terminal, the battery management unit automatically carries out charge and discharge management and abnormal state monitoring on the backup battery through the backup battery, the battery management unit, the switch module and the connection interface, so that the normal work of the backup battery is ensured, and the service life of the battery is prolonged; the backup power supply device of the power terminal is connected with the power terminal through a necessary, standard and universal connection interface, when the power terminal is powered off, the backup power supply device of the power terminal can be switched in for supplying power immediately and seamlessly to ensure that the power terminal can work continuously after being powered off, even if a backup battery used by the power terminal is invalid, the backup power supply device of the power terminal is replaced, the power terminal can be reused, so that the client investment is reduced, the technical problem that the replacement of the backup battery of the existing power terminal is troublesome or cannot be replaced due to the limitation of the battery specification and the battery management circuit, and the terminal cannot be used normally is solved.
In one embodiment of the present invention, a temperature sensing element NTC for sensing the temperature of the battery B1 is further connected between the battery management unit U1 and the battery B1, and the temperature sensing element NTC is attached to the battery B1.
As shown in fig. 1, the temperature detection element NTC is connected between the battery temperature sensing control terminal of the battery management chip and the battery B1. In this embodiment, the temperature detecting element NTC may be a thermistor or a temperature sensor. The NTC is a negative temperature coefficient thermistor, which is mounted closely to the backup battery B1 to convert the surface temperature of the backup battery B1 into a voltage signal, so that the battery management chip can sense the temperature of the backup battery B1 conveniently.
In one embodiment of the present invention, a third semiconductor device D3 is connected between the backup battery B1 and the second switching element K2, and a third voltage stabilization element U3 is connected between the second switching element K2 and the power output interface 2. A first semiconductor device D1 and a second voltage stabilization element U2 are connected between the power input interface 1 and the battery management unit U1. The cathode of the first semiconductor device D1 is connected to the first switching element K1 through the fourth voltage stabilization element U4. A second semiconductor device D2 is also connected between the backup battery B1 and the third switching element K3 and the fourth switching element K4.
It should be noted that the first semiconductor device D1, the second semiconductor device D2, and the third semiconductor device D3 are all mainly used for controlling the direction of current, and the third voltage stabilizing element U3 is mainly used for stabilizing the voltage output by the backup battery B1 to a specific voltage and supplying the voltage to the power terminal; the second voltage stabilizing element U2 mainly stabilizes an external power input or a power output from the backup battery B1 to a specific voltage, and supplies the voltage to the battery management chip; the fourth voltage stabilization element U4 primarily stabilizes the power input from the external power supply to a specific voltage to charge the backup battery B1. In the present embodiment, the second, third and fourth voltage stabilizing elements U2, U3 and U4 may be voltage regulators. The first, second, and third semiconductor devices D1, D2, and D3 may each be a diode.
In the embodiment of the invention, the backup power supply device of the power terminal starts the external power supply input or the key interface is started in the shutdown state, and the battery management chip obtains the power supply and starts the startup. After the battery management chip is started, the fourth switch element K4 is immediately controlled through the keep-alive control end, the power supply of the battery management chip by the backup battery B1 is kept, and the battery management chip is still in a working state after the awakening key interface is loosened. After the keep-alive control end of the battery management chip is started, the battery management chip enters a stable working state, immediately tries to handshake with a CPU of the power terminal, and starts three processes:
a first process: and the monitoring communication interface receives a command issued by the CPU of the power terminal and replies the query of the CPU. If the CPU of the power terminal sends a shutdown command, the battery management chip executes to close the output of the external power supply of the backup battery B1 and close the keep-alive control end of the battery management chip, at this time, the power terminal does not have the backup battery B1 for supplying power, if the power terminal does not have the external power supply input, the power terminal is shut down due to power failure, and the battery management chip also stops working.
And a second process: and monitoring the temperature of the backup battery, reporting the abnormal event of the backup battery to a CPU (central processing unit) of the power terminal by the battery management chip through a communication interface of the USB (universal serial bus) if the temperature of the backup battery B1 exceeds a preset temperature threshold, closing the output of an external power supply of the backup battery, closing a keep-alive control end of the battery management chip and the like according to the reply of the CPU of the power terminal after the report is finished.
A third process: battery state monitoring, charge/discharge switch control, activation control, and abnormality processing for the backup battery B1. And monitoring the voltage of the backup battery B1 in real time, charging the backup battery B1 when the electric quantity of the backup battery B1 is insufficient and the power supply input is normal, and closing the power supply output and closing the battery management chip to keep alive if the electric quantity of the backup battery B1 is insufficient and no external power supply input exists. And (4) rapidly carrying out charging and discharging operations on the backup battery B1 according to the execution depth of the preset period so as to achieve the purposes of activating the battery and delaying passivation. And (3) carrying out exception handling and reporting on the backup battery B1 by adopting a communication interface, wherein the exception of the backup battery B1 comprises serious reduction of battery capacity, insufficient battery capacity, no external power input, battery charging and discharging current, voltage exception and the like.
Example two:
fig. 2 is a flowchart illustrating steps of a backup power supply method for an electric power terminal according to an embodiment of the present invention.
As shown in fig. 2, an embodiment of the present invention further provides a backup power supply method for an electric power terminal, where based on the backup power supply apparatus for an electric power terminal, the backup power supply method for an electric power terminal includes the following steps:
s10, acquiring the power supply state of an external power supply of the power terminal, wherein the power supply state of the external power supply comprises normal power supply and power supply stop;
s20, according to the fact that the power supply state of an external power supply of the power terminal is in normal power supply, monitoring the shortage of electric quantity of a backup battery by a battery management unit, controlling a first switch element to be closed by the battery management unit, and charging the backup battery by the external power supply through a power supply output interface;
and S30, controlling the second switch element to be closed by adopting a battery management unit to output a power supply through a power supply output interface according to the fact that the power supply state of an external power supply of the power terminal is in a power supply stop state or a key interface is started, and supplying power to the power terminal.
In the embodiment of the present invention, in step S30, according to the state of the external power supply of the power terminal being in a power supply stop state or a start of the key interface, if the battery management unit monitors that the backup battery is in an abnormal state, the battery management unit controls the second switch element to be turned off, and the backup battery is turned off to discharge; the backup battery is in an abnormal state and comprises battery over-discharge, over-charge and under-voltage, and the battery temperature exceeds a temperature threshold value.
In the embodiment of the invention, when the battery management unit monitors that the backup battery is in an abnormal state, the battery management unit reports the information that the monitored backup battery is in the abnormal state through the communication interface.
In the embodiment of the present invention, in step S30, the battery management unit controls the second switch element to be turned off and the backup battery to be discharged if the power output interface fails to be connected to the power terminal according to the power supply status of the external power source of the power terminal being in the power supply stop state or the key interface being started.
The power supply method based on the backup power supply device of the power terminal is mainly characterized in that the backup power supply device of the power terminal obtains power supply and starts to be started when an external power supply input or a key interface of the power terminal is started; if the key interface is awakened to be started, the power terminal obtains the continuous power supply capacity information of the backup battery B1 through the communication interface, if the power supply capacity of the backup battery B1 is insufficient, the backup power supply device of the power terminal is automatically turned off, the key interface is awakened to fail to the backup power supply device of the power terminal, and the power terminal is not started. The power terminal can also refresh the real-time information of the backup battery B1 through the communication interface, if the backup power supply device of the power terminal fails to be continuously started with the power terminal, the backup power supply device of the power terminal is automatically shut down, and the phenomenon that the service life of the battery is reduced due to continuous discharge of the backup battery B1 under abnormal conditions is avoided. When the battery management unit U1 monitors that the backup battery B1 is in an over-discharge state, the discharge and activation process of the backup battery B1 is closed, the state is updated, and the abnormality of the backup battery B1 is reported, at the moment, if an external power supply of the power terminal stops working, a backup power supply device of the power terminal is immediately and automatically shut down, and the service life reduction caused by the continuous discharge of the backup battery B1 is avoided. If the battery management unit U1 monitors that the temperature of the backup battery B1 exceeds a temperature threshold (such as 60 ℃), the backup battery B1 charging, discharging and battery activation processes are closed, the state is updated, the backup battery B1 abnormality is reported, and accidents caused by continuous temperature rise are avoided. And when the battery management unit U1 monitors that the backup battery B1 is in an overcharged state, the backup battery B1 is turned off to be charged, the state is updated, and the abnormality of the backup battery B1 is reported, so that the service life of the battery is prevented from being reduced due to continuous charging. If the battery management unit U1 monitors that the backup battery B1 is in an undervoltage state, the state is updated and the abnormality of the backup battery B1 is reported, and the backup battery B1 of the power terminal is informed of the shortage of the continuous power supply capacity. When the battery management unit U1 monitors that the backup battery B1 is activated and the performance of the battery is reduced or the service life of the battery is exhausted, the battery management unit U1 updates the state and reports the abnormality of the backup battery B1, and informs the power terminal to replace the backup battery B1 in time so as to avoid the subsequent abnormal work. When the battery management unit U1 monitors that the backup battery B1 is insufficient, the backup battery B1 is enabled to be charged, and the capacity of the backup battery B1 is prevented from being insufficient when an external power supply of the power terminal stops working. When the battery management unit U1 monitors that the charging of the backup battery B1 is completed, the charging of the backup battery B1 is closed, if the backup battery B1 is abnormal, the state is updated, the battery abnormality is reported, and the power terminal is informed to replace the backup battery B1 in time. If the battery management unit U1 monitors that the backup battery B1 has not been discharged for a long time, the activation process of the backup battery B1 is triggered, the passivation of the backup battery B1 is avoided, and the service life of the backup battery B1 is prolonged. The backup power supply device of the power terminal receives and executes a communication message sent by the power terminal through the communication interface, and if the power terminal requests to be shut down, the backup power supply device of the power terminal automatically shuts down.
The information on the backup battery B1 includes: battery surface temperature, battery current voltage, battery charging current, power supply status, etc.
In the embodiment of the invention, the backup power supply device of the power terminal only needs to be provided with the power input interface, the power output interface, the communication interface and the key interface. The range of the power supply input voltage provided by the backup power supply device of the power terminal can be as wide as 5V to 12V of direct current, and the output power supply voltage provided by the backup battery B1 for the power terminal is 5V of stable direct current; the key interface can adopt a key capable of switching on and off a mechanical switch, the backup battery B1 can be awakened by short-circuit two contacts of the key, and the backup battery B1 supplies power. The communication interface adopts a USB interface as a communication channel between the CPU of the power terminal and the battery management chip, the backup battery B1 reports the abnormality through the communication interface, and the CPU of the power terminal transmits signals through the communication interface to enable the battery management chip to control the output of the backup battery B1.
According to the backup power supply device of the power terminal, the battery management unit and the backup battery are integrated, so that software and hardware decoupling between the backup battery and the battery management unit, and between the switch module and the connection interface is realized. The backup battery and the power terminal are both pre-installed with communication protocols, and the backup power supply device of the power terminal is automatically registered to the power terminal after being powered on and is plug-and-play. When the state of the backup battery is abnormal, the backup power supply device of the power terminal immediately reports the abnormality through the communication interface to remind the power terminal to perform the next processing; when an abnormality occurs and is not recoverable, the backup power supply device of the power terminal can be directly replaced without worrying about mismatching between the backup power supply device of the power terminal and the power terminal.
The terminal device may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor, a memory. Those skilled in the art will appreciate that the terminal device is not limited and may include more or fewer components than those shown, or some components may be combined, or different components, e.g., the terminal device may also include input output devices, network access devices, buses, etc.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage may be an internal storage unit of the terminal device, such as a hard disk or a memory of the terminal device. The memory may also be an external storage device of the terminal device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the terminal device. Further, the memory may also include both an internal storage unit of the terminal device and an external storage device. The memory is used for storing computer programs and other programs and data required by the terminal device. The memory may also be used to temporarily store data that has been output or is to be output.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A backup power supply device of a power terminal is characterized by comprising a battery management unit, a backup battery, a switch module and a connection interface, wherein the backup battery, the switch module and the connection interface are connected with the battery management unit; the first switch element is respectively connected with the charging control end of the battery management unit and the backup battery, the second switch element is respectively connected with the external discharging control end of the battery management unit, the backup battery and the power output interface, the third switch element is respectively connected with the key interface and the backup battery, the fourth switch element is respectively connected with the protection control end of the battery management unit and the backup battery, and the fifth switch element is respectively connected with the ground discharging control end of the battery management unit, the backup battery and the ground;
the battery management unit is used for controlling the charging and discharging of the backup battery and monitoring the state of the backup battery, and monitored data are reported through the communication interface.
2. A backup power supply device for an electric power terminal according to claim 1, wherein a temperature detection element for detecting the temperature of the backup battery is further connected between the battery management unit and the backup battery, and the temperature detection element is attached to the backup battery.
3. A backup power supply device for an electric power terminal according to claim 1, characterized in that a third semiconductor device is connected between the backup battery and the second switching element, and a third voltage stabilizing element is connected between the second switching element and the power output interface.
4. A backup power supply device for an electric power terminal according to claim 1, characterized in that a first semiconductor device and a second voltage stabilizing element are connected between said power input interface and said battery management unit.
5. A backup power supply device for an electric power terminal according to claim 4, characterized in that the cathode of said first semiconductor device is connected to said first switching element through a fourth voltage stabilizing element.
6. A backup power supply device for an electric power terminal according to claim 1, characterized in that a second semiconductor device is further connected between said backup battery and said third and fourth switching element connections.
7. A backup power supply method of an electric power terminal, based on the backup power supply device of the electric power terminal according to any one of claims 1 to 6, the backup power supply method of the electric power terminal comprising the steps of:
s10, acquiring the power supply state of an external power supply of the power terminal, wherein the power supply state of the external power supply comprises normal power supply and power supply stop;
s20, according to the fact that the power supply state of an external power supply of the power terminal is in normal power supply, monitoring the shortage of electric quantity of a backup battery by a battery management unit, controlling a first switch element to be closed by the battery management unit, and charging the backup battery by the external power supply through a power supply output interface;
and S30, controlling the second switch element to be closed by adopting a battery management unit to output a power supply through a power supply output interface according to the fact that the power supply state of an external power supply of the power terminal is in a power supply stop state or a key interface is started, and supplying power to the power terminal.
8. A method for supplying power to a backup power of an electric power terminal according to claim 7, wherein in step S30, if the battery management unit monitors that the backup battery is in an abnormal state, the battery management unit controls the second switch element to be turned off to turn off the discharge of the backup battery according to the power supply status of the external power source of the electric power terminal being in a power supply stop state or a key interface start state; the backup battery is in an abnormal state and comprises battery over-discharge, over-charge, under-voltage and battery temperature exceeding a temperature threshold.
9. The method for supplying power to the power terminal in a backup manner according to claim 8, wherein when the battery management unit monitors that the backup battery is in an abnormal state, the battery management unit reports information that the monitored backup battery is in the abnormal state through a communication interface.
10. The method for supplying power to a backup power of an electric power terminal of claim 7, wherein in step S30, the battery management unit controls the second switch element to be turned off and the backup battery to be discharged if the power output interface fails to connect to the electric power terminal according to the state of the external power supply of the electric power terminal being in a power supply stop state or a key interface start state.
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| CN202011494982.6A CN112653231A (en) | 2020-12-17 | 2020-12-17 | Backup power supply device and method for power terminal |
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| EP4462635A1 (en) * | 2023-05-10 | 2024-11-13 | Reuter GmbH & Co. KG | Circuit arrangement for supplying voltage to an electrochemical cleaning device |
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