CN115589057A - Power management system and method for rainwater and sewage pipe network monitoring equipment - Google Patents
Power management system and method for rainwater and sewage pipe network monitoring equipment Download PDFInfo
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- CN115589057A CN115589057A CN202211190528.0A CN202211190528A CN115589057A CN 115589057 A CN115589057 A CN 115589057A CN 202211190528 A CN202211190528 A CN 202211190528A CN 115589057 A CN115589057 A CN 115589057A
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- power supply
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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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
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a power management system and a method for a rainwater and sewage pipe network monitoring device, wherein the output end of a power management system is connected with an application system, and the power management system comprises a voltage monitoring unit, a boosting unit and a power management control unit; the voltage monitoring unit is connected with the external power supply and used for detecting the voltage of the external power supply and disconnecting the external power supply access when the voltage of the external power supply exceeds the voltage threshold range; the voltage boosting unit is connected with the output end of the voltage monitoring unit and used for determining that the voltage of the external power supply is greater than the voltage of the internal power supply to achieve the condition of charging the internal power supply, and the power management control unit is connected with the voltage boosting unit and used for switching the power supply modes of the external power supply or the internal power supply. The invention is provided with different power supply management modules, thereby realizing the function of automatically switching the internal power supply and the external power supply while ensuring the safe and stable operation of the system, supporting the charging of the external power supply, and keeping the internal power supply in a full power state for the use when the external power supply is abnormal.
Description
Technical Field
The invention relates to the technical field of battery charging and discharging, in particular to a power management system and method for a rainwater and sewage pipe network monitoring device.
Background
Pipe network monitoring facilities in city rain sewage pipe network monitoring application field generally install in the pipe shaft, and equipment receives the restriction of installation environment, adopts the power supply of large capacity battery pack usually, and inside integrated small capacity lithium cell group is as reserve simultaneously.
The defects of the prior art are that the traditional scheme is that the commercial power and the large-capacity battery pack directly supply power or supply power by an internal power supply, and the equipment cannot normally run when the commercial power and the large-capacity battery pack are powered off or the electric quantity is insufficient; under the internal power supply condition, when changing lithium cell group or charging, need unpack apart the equipment, increase the maintenance volume, can lose partial data simultaneously (the pipe network monitoring facilities shortest acquisition time is 5 minutes), the protection is put to the battery overdischarge not generally done to prior art in addition, when the battery overdischarge, can seriously influence battery life.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and adopts a power management system and a power management method for a rainwater and sewage pipe network monitoring device to solve the problems in the background art.
A power management system of a rain and sewage pipe network monitoring device is characterized in that the output end of the power management system is connected with an application system, and the power management system comprises a voltage monitoring unit, a boosting unit and a power management control unit;
the voltage monitoring unit is connected with the external power supply and is used for detecting the voltage of the external power supply and disconnecting the external power supply access when the voltage of the external power supply exceeds the voltage threshold range;
the voltage boosting unit is connected with the output end of the voltage monitoring unit and used for determining that the voltage of the external power supply is greater than the voltage of the internal power supply so as to achieve the condition of charging the internal power supply;
and the power management control unit is connected with the boosting unit and is used for switching the power supply modes of an external power supply or an internal power supply and supplying power to the internal power supply.
As a further scheme of the invention: and the signal output end of the voltage monitoring unit is connected to the signal input end of the application system and used for feeding back the state of the external power supply.
As a further scheme of the invention: the boosting unit consists of a boosting chip and a boosting circuit.
As a further aspect of the invention: the power management control unit consists of a charge and discharge management chip and a control management circuit.
As a further aspect of the invention: the power management control unit is connected with an internal power supply.
As a further aspect of the invention: the internal power supply adopts a lithium battery pack capable of automatically charging and discharging, and has overcharge and overdischarge protection.
The technical scheme of the other aspect is as follows: a power management method for a rainwater and sewage pipe network monitoring device is applied to the power management system comprising the rainwater and sewage pipe network monitoring device, and comprises the following specific steps:
the voltage monitoring unit detects the voltage of the external power supply in real time, judges whether the current voltage is in a preset voltage threshold range or not, and feeds back the current state of the external power supply to the application system;
if the current power supply voltage is within the preset voltage threshold range, the boosting unit boosts the output voltage and charges the internal power supply; and
the power management control unit judges and controls switching to supply power to the application system by the external power supply or supply power to the application system by the internal power supply according to the states of the voltage of the external power supply and the internal power supply.
As a further scheme of the invention: the specific steps of the power management control unit judging and controlling the switching of the power supply of the external power supply to the application system or the power supply of the internal power supply to the application system according to the voltage states of the external power supply and the internal power supply comprise:
when the external power supply is normal and the internal power supply is fully charged, the power supply of the application system is provided by the external power supply through the power management control unit;
when the external power supply is normal and the internal power supply is not fully charged, the external power supply supplies power to the application system through the power management control unit and also charges the internal power supply;
when the external power supply is abnormal, the voltage monitoring unit disconnects the external power supply path, and the power supply management control unit automatically switches the power supply of the application system to the internal power supply after detecting the disconnection of the external power supply;
when the external power supply is switched from abnormal to normal, the voltage monitoring unit opens the external power supply path, and the power supply management control unit automatically switches the power supply of the application system to the external power supply.
Compared with the prior art, the invention has the following technical effects:
by adopting the technical scheme, the power management system arranged at the input end of the application system mainly comprises the voltage monitoring unit, the boosting unit and the power management control unit, so that the voltage of an external power supply is detected, the function of automatically switching an internal power supply and an external power supply is realized, and the power management system has overcurrent, overvoltage, undervoltage and short-circuit protection and ensures the safe and stable operation of the system; and meanwhile, the lithium battery pack of the internal power supply is automatically charged by the external power supply, and the lithium battery pack of the internal power supply keeps a full-charge state for use when the external power supply is abnormal.
Drawings
The following detailed description of embodiments of the invention refers to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a power management system according to an embodiment of the present disclosure;
FIG. 2 is a power switching flow diagram of a power management system according to an embodiment of the disclosure;
fig. 3 is a flowchart illustrating charging of a lithium battery pack according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, an output end of a power management system of a rain and sewage pipe network monitoring device is connected to an application system, and the power management system mainly includes three parts, a voltage monitoring unit, a voltage boosting unit, and a power management control unit;
the voltage monitoring unit is connected with the external power supply and is used for detecting the voltage of the external power supply, and when the voltage of the external power supply exceeds a voltage threshold range (namely when the voltage of the external power supply is lower than a lowest voltage threshold or higher than a highest voltage threshold), the external power supply is disconnected until the voltage of the external power supply is recovered to be within the voltage threshold range. In one embodiment, the voltage threshold is determined according to the power supply range of the application system and the characteristics of the external power supply.
In this embodiment, a signal output end of the voltage monitoring unit is connected to a signal input end of the application system, and is configured to feed back a state of the external power supply, and when the voltage of the external power supply is higher than or lower than a voltage threshold, the voltage monitoring unit will send an alarm signal to the application system while disconnecting a power supply path.
The voltage boosting unit is connected with the output end of the voltage monitoring unit and used for determining that the voltage of the external power supply is greater than the voltage of the internal power supply so as to achieve the condition of charging the internal power supply. Specifically, the output voltage is determined according to the number of lithium batteries of the internal power supply, the output voltage is guaranteed to be larger than the full charge voltage of the lithium battery pack, and the output voltage is used as one of the lithium battery pack charging conditions of the internal power supply.
And the power management control unit is connected with the boosting unit and is used for switching the power supply mode of an external power supply or an internal power supply and supplying power to the internal power supply. The power management control unit is composed of a charge-discharge management chip and a control management circuit and is mainly used for automatically switching internal and external power supplies, charging a lithium battery pack of the internal power supply, protecting the battery and the like, and stable operation of the equipment is guaranteed.
The power management control unit is connected with an internal power supply, the internal power supply adopts a lithium battery pack which can be automatically charged and discharged, and the internal power supply has overcharge and overdischarge protection functions.
The technical scheme of the other aspect is as follows: a power management method for a rainwater and sewage pipe network monitoring device is applied to the power management system comprising the rainwater and sewage pipe network monitoring device, and comprises the following specific steps:
as shown in fig. 2, a power switching flow based on a power management system is illustrated;
as shown in fig. 3, a lithium battery charging flow chart is illustrated;
a power supply management system is arranged between an external power supply and an application system, is connected with the external power supply through a voltage monitoring unit to detect the voltage of the external power supply in real time, judges whether the current voltage is in a preset voltage threshold range or not, and sends and feeds back a corresponding state signal of the current external power supply to the application system;
after judgment, if the current power supply voltage is in a preset voltage threshold range, the output voltage of the voltage is boosted by using the boosting unit, and meanwhile, an internal power supply is charged; and
the power management control unit judges and controls switching to supply power to the application system by the external power supply or supply power to the application system by the internal power supply according to the states of the voltage of the external power supply and the internal power supply.
In this embodiment, the specific steps of the power management control unit determining to control switching between power supply from the external power supply to the application system or power supply from the internal power supply to the application system according to the states of the external power supply and the internal power supply voltage include:
when the external power supply is normal and the internal power supply is full, the power supply of the application system is provided by the external power supply through the power management control unit;
in this embodiment, the power management control unit may further enable a power dynamic management (DPM), and if there is no DPM, the power supply must be capable of providing a maximum system current and a maximum charging current at the same time. With the DPM, when the input current exceeds the set input current limit, the power management control unit can reduce the charging current and reduce the system loss. Preferentially ensuring the power supply of an application system;
when the external power supply is abnormal, the voltage monitoring unit disconnects the external power supply path, and the power management control unit automatically switches the power supply of the application system to the internal power supply after detecting the disconnection of the external power supply, so that the normal operation of the system is ensured;
when the external power supply is switched from abnormal to normal, the voltage monitoring unit opens the external power supply path, and the power supply management control unit automatically switches the power supply of the application system to the external power supply.
When the lithium battery pack of the internal power supply supplies power, the power management control unit monitors the power supply voltage of the lithium battery pack of the internal power supply, and when the voltage value is reduced to the over-discharge threshold value of the battery, the internal lithium battery power supply circuit can be automatically disconnected, so that the over-discharge of the lithium battery pack is prevented, and the service life of the lithium battery pack is ensured.
In this embodiment, when the external power supply recovers from an abnormal (overvoltage, undervoltage, or overcurrent) state, the power management control unit detects that the external power supply is normal, and then automatically switches the power supply of the application system to the external power supply, and meanwhile, determines whether the lithium battery pack of the internal power supply needs to be charged.
When the external power supply is normal and the voltage of the lithium battery pack of the internal power supply is reduced to be lower than the charging threshold value, the power supply management control unit starts a lithium battery pack charging period. One battery charging period can be divided into four stages of trickle charging, constant-current charging, constant-voltage charging and terminating charging.
Trickle charging is also called pre-charging, the charging current is 1/10 of the set current, and the lithium battery pack enters a standard charging process after the voltage rises to a certain value;
the standard charging process is as follows: constant current charging is carried out by using a set current, and when the voltage of the battery rises to a certain value, constant voltage charging is changed to keep a certain charging voltage. At this time, the charging current gradually decreases, and when the current decreases to the set termination current, the charging ends.
The power management control unit can select proper pre-charging current, charging voltage, charging current and termination current according to the lithium battery pack parameters of the internal power supply, and ensures that different lithium battery packs select proper charging parameters.
The power management control unit has thermal shutdown protection, and during the charging process of the lithium battery pack, when the junction temperature exceeds a temperature threshold value of 145 ℃, the charging of the lithium battery pack is closed and self-protected. The lithium battery pack is charged and kept in a closed state until the junction temperature is reduced to below 130 ℃; then, if all other enabling charge conditions are valid, the lithium battery pack charging will continue.
The power management control unit has a charging safety timing function, sets certain charging time, and when the charging time reaches a charging time threshold value, the charging action is automatically terminated, so that the long-time floating charging of the battery is prevented, and the service life of the lithium battery pack of the internal power supply is prolonged.
The power management control unit also has functions of battery charging indication, battery detection indication and the like.
When the power supply of the external power supply is normal, the external power supply is connected to the power management control unit through the booster circuit to supply power to the equipment of the application system; when the external power supply is abnormal in power supply, including power supply outage, overvoltage, undervoltage and overcurrent, the voltage detection unit can disconnect the external power supply and switch the power supply of the application system to the lithium battery pack of the internal power supply; when the lithium battery pack of the internal power supply supplies power, the equipment can send an abnormal warning of the external power supply to inform personnel of overhauling; if the external power supply is recovered to be normal, the power management system switches the power supply of the application system to the external power supply for supplying power, meanwhile, when the voltage of the lithium battery pack of the internal power supply is lower than a set threshold value, the external power supply charges the lithium battery pack of the internal power supply through the power management control unit, the charging process has overcurrent and overcharge protection, and the charging is automatically stopped after the lithium battery pack is fully charged; if the external power supply is not recovered after a period of time, and the electric quantity of the lithium battery pack of the internal power supply is exhausted quickly, the power management system starts the over-discharge protection of the lithium battery pack, closes the power supply and ensures the service life of the lithium battery.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents, and all such modifications are intended to be included within the scope of the invention.
Claims (8)
1. A power management system of a rain and sewage pipe network monitoring device is characterized in that the output end of the power management system is connected with an application system, and the power management system comprises a voltage monitoring unit, a boosting unit and a power management control unit;
the voltage monitoring unit is connected with the external power supply and is used for detecting the voltage of the external power supply and disconnecting the external power supply access when the voltage of the external power supply exceeds the voltage threshold range;
the voltage boosting unit is connected with the output end of the voltage monitoring unit and used for determining that the voltage of the external power supply is greater than the voltage of the internal power supply so as to achieve the condition of charging the internal power supply;
and the power management control unit is connected with the boosting unit and is used for switching the power supply modes of an external power supply or an internal power supply and supplying power to the internal power supply.
2. The power management system of claim 1, wherein the signal output terminal of the voltage monitoring unit is connected to the signal input terminal of the application system for feeding back the state of the external power source.
3. The power management system of claim 1, wherein the voltage boost unit comprises a voltage boost chip and a voltage boost circuit.
4. The power management system of claim 1, wherein the power management control unit comprises a charging and discharging management chip and a control management circuit.
5. The power management system of claim 4, wherein the power management control unit is connected to an internal power source.
6. The power management system of claim 1, wherein the internal power supply is an automatic charging and discharging lithium battery pack with overcharge and overdischarge protection.
7. A power management method for a sewer pipe network monitoring device, which is applied to the power management system comprising the sewer pipe network monitoring device as claimed in any one of claims 1 to 6, and comprises the following specific steps:
the voltage monitoring unit detects the voltage of the external power supply in real time, judges whether the current voltage is in a preset voltage threshold range or not, and feeds back the current state of the external power supply to the application system;
if the current power supply voltage is within the preset voltage threshold range, the boosting unit boosts the output voltage and charges the internal power supply; and
the power management control unit judges and controls switching to supply power to the application system by the external power supply or supply power to the application system by the internal power supply according to the states of the voltage of the external power supply and the internal power supply.
8. The power management method of claim 7, wherein the step of the power management control unit determining whether to switch the power supply from the external power source to the application system or from the internal power source to the application system according to the voltage status of the external power source and the internal power source comprises:
when the external power supply is normal and the internal power supply is full, the power supply of the application system is provided by the external power supply through the power management control unit;
when the external power supply is normal and the internal power supply is not fully charged, the external power supply supplies power to the application system through the power management control unit and also charges the internal power supply;
when the external power supply is abnormal, the voltage monitoring unit disconnects the external power supply path, and the power supply management control unit automatically switches the power supply of the application system to the internal power supply after detecting the disconnection of the external power supply;
when the external power supply is switched from abnormal to normal, the voltage monitoring unit opens the external power supply path, and the power supply management control unit automatically switches the power supply of the application system to the external power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211190528.0A CN115589057A (en) | 2022-09-28 | 2022-09-28 | Power management system and method for rainwater and sewage pipe network monitoring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211190528.0A CN115589057A (en) | 2022-09-28 | 2022-09-28 | Power management system and method for rainwater and sewage pipe network monitoring equipment |
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| Publication Number | Publication Date |
|---|---|
| CN115589057A true CN115589057A (en) | 2023-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211190528.0A Pending CN115589057A (en) | 2022-09-28 | 2022-09-28 | Power management system and method for rainwater and sewage pipe network monitoring equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115589057A (en) |
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- 2022-09-28 CN CN202211190528.0A patent/CN115589057A/en active Pending
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