CN112803459A - Uninterruptible power supply with peak clipping, valley filling and quick charging functions and use method - Google Patents
Uninterruptible power supply with peak clipping, valley filling and quick charging functions and use method Download PDFInfo
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- CN112803459A CN112803459A CN202110110190.2A CN202110110190A CN112803459A CN 112803459 A CN112803459 A CN 112803459A CN 202110110190 A CN202110110190 A CN 202110110190A CN 112803459 A CN112803459 A CN 112803459A
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- alternating current
- ups
- current contactor
- power supply
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- 238000000034 method Methods 0.000 title claims abstract description 19
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 57
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 101100372018 Arabidopsis thaliana UPS4 gene Proteins 0.000 description 7
- 244000062793 Sorghum vulgare Species 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 235000019713 millet Nutrition 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
-
- 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
Abstract
The invention provides an uninterrupted power supply with peak clipping, valley filling and quick charging functions and a using method thereof, belonging to the technical field of uninterrupted power supplies, wherein the uninterrupted power supply comprises: a controller; the display screen is connected with the controller; the switching power supply is connected with the controller; the UPS is connected with the controller and the switching power supply; the battery control box is connected with the controller and the UPS; the lithium battery pack is connected with the battery control box; the quick charger is connected with the battery control box; the ammeter is connected with the controller; one end of the first alternating current contactor is connected with the ammeter, and the other end of the first alternating current contactor is connected with the UPS; one end of the second alternating current contactor is connected with the first alternating current contactor, and the other end of the second alternating current contactor is connected with the quick charger; one end of the first relay is connected with the controller, and the other end of the first relay is connected with the first alternating current contactor; and one end of the second relay is connected with the controller, and the other end of the second relay is connected with the second alternating current contactor. The invention has the advantages that: the convenience of uninterrupted power source use has greatly been promoted, use cost has been reduced.
Description
Technical Field
The invention relates to the technical field of uninterruptible power supplies, in particular to an uninterruptible power supply with peak clipping, valley filling and quick charging functions and a using method thereof.
Background
Under the scene of mobile high-Power alternating current Power supply requirement or long-time uninterrupted Power supply requirement, a UPS (uninterruptible Power supply) is required to provide alternating current for a long time after the commercial Power is disconnected, such as an electric vehicle rescue charging vehicle, a medical UPS, an unattended station and the like.
Most of traditional UPS uses lead-acid batteries for power supply, and has the problems of large size, heavy weight and low standby power, and lithium ion batteries with the same size can support alternating current loads to work off the grid for a longer time, so that UPS using lithium ion batteries becomes a new development trend. The lithium iron phosphate battery is one kind of lithium ion battery, and full life cycle can charge and discharge about 3000 times, but under the current UPS pure power supply mode, only use 4 ~ 6 times per year on average, be very big waste. For a UPS applied in a mobile scene, the UPS needs to enter an off-grid state at any time, but the traditional UPS does not have a quick charging function, so that the application of the UPS is limited to a certain extent.
Therefore, how to provide an uninterruptible power supply with peak clipping, valley filling and quick charging functions and a using method thereof, so as to improve the convenience of using the uninterruptible power supply and reduce the using cost, which is a problem to be solved urgently.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an uninterruptible power supply with peak clipping, valley filling and quick charging functions and a using method thereof, so that the convenience of using the uninterruptible power supply is improved, and the using cost is reduced.
In a first aspect, the present invention provides an uninterruptible power supply with peak clipping, valley filling, and fast charging functions, including:
a controller;
the display screen is connected with the controller;
the switching power supply is connected with the controller;
the UPS is connected with the controller and the switching power supply;
the battery control box is connected with the controller and the UPS;
the lithium battery pack is connected with the battery control box;
the quick charger is connected with the battery control box;
the ammeter is connected with the controller;
one end of the first alternating current contactor is connected with the ammeter, and the other end of the first alternating current contactor is connected with the UPS;
one end of the second alternating current contactor is connected with the first alternating current contactor, and the other end of the second alternating current contactor is connected with the quick charger;
one end of the first relay is connected with the controller, and the other end of the first relay is connected with the first alternating current contactor;
and one end of the second relay is connected with the controller, and the other end of the second relay is connected with the second alternating current contactor.
Further, the display screen is a touch display screen.
Further, the battery control box includes:
the first BMS is respectively connected with the UPS and the lithium battery pack;
and the third relay is respectively connected with the first BMS, the UPS and the lithium battery pack.
Further, the lithium battery pack includes:
a plurality of lithium iron phosphate batteries; each lithium iron phosphate battery comprises a second BMS and a battery cell; each second BMS and the battery control box are connected through a CAN bus; and one end of the battery cell is connected with the second BMS, and the other end of the battery cell is connected with the battery control box.
Further, still include:
and the sensor group is connected with the controller.
Further, the sensor group comprises at least:
the water logging sensor is connected with the controller;
a smoke sensor connected with the controller;
the entrance guard sensor is connected with the controller;
and the temperature sensor is connected with the controller.
In a second aspect, the present invention provides a method for using an uninterruptible power supply with peak clipping, valley filling and fast charging functions, including the following steps:
step S10, electrifying and self-checking the UPS;
step S20, setting an SOC upper limit threshold, an SOC lower limit threshold and time periods corresponding to a flat time period, a valley time period and a peak time period by the controller, and acquiring the real-time SOC of the lithium battery pack through the battery control box;
step S30, the controller judges whether the current time is in a flat time interval, a valley time interval or a peak time interval, if the current time is in the flat time interval, the step S40 is executed; if it is the valley period, go to step S50; if the peak period is the peak period, the process proceeds to step S70;
step S40, the controller conducts the first alternating current contactor, disconnects the second alternating current contactor, slowly charges the lithium battery pack and the load through the UPS, and enters step S100 after charging is completed;
step S50, the controller judges whether the real-time SOC is smaller than or equal to an SOC upper limit threshold value, if so, the first alternating current contactor and the second alternating current contactor are conducted, the lithium battery pack is rapidly charged by a rapid charger, the load is slowly charged by a UPS, and the step S60 is carried out; if not, the controller conducts the first alternating current contactor, disconnects the second alternating current contactor, slowly charges the load through the UPS, and enters the step S100 after the charging is finished;
step S60, the controller judges whether the real-time SOC is less than or equal to the SOC upper limit threshold value, if so, the step S50 is executed; if not, the controller disconnects the second alternating current contactor, the quick charger is enabled to be in a standby state, the load is slowly charged through the UPS, and the step S100 is executed after the charging is finished;
step S70, the controller judges whether the real-time SOC is smaller than or equal to an SOC lower limit threshold, if so, the first alternating current contactor is conducted, the second alternating current contactor is disconnected, the lithium battery pack and the load are slowly charged by the UPS, and the step S100 is carried out after the charging is finished; if not, go to step S80;
step S80, disconnecting the first alternating current contactor and the second alternating current contactor, enabling the UPS to enter a power protection mode, and controlling the lithium battery pack to perform inversion discharge to charge a load through the battery control box;
step S90, the controller judges whether the real-time SOC is smaller than or equal to an SOC lower limit threshold, if so, the first alternating current contactor is conducted, the second alternating current contactor is disconnected, the lithium battery pack and the load are slowly charged by the UPS, and the step S100 is carried out after the charging is finished; if not, go to step S80;
and step S100, performing shutdown operation on the uninterrupted power supply.
Further, the step S10 specifically includes:
step S11, powering on the uninterrupted power supply;
step S12, the controller carries out power-on self-test, judges whether a fault exists, if yes, the step S13 is carried out; if not, go to step S20;
step S13, after the UPS is closed, fault processing is carried out, whether the fault is recovered or not is judged, if yes, the UPS is started, and the step S20 is carried out; if not, the first ac contactor and the second ac contactor are disconnected, the UPS is turned off, and the process proceeds to step S100.
The invention has the advantages that:
1. the lithium battery pack is formed by the lithium iron phosphate battery, so that compared with the traditional lead-acid battery, the lithium battery pack is smaller in size and weight, and can support alternating current load to work off the grid for a longer time; through setting up quick charge machine, can carry out quick charge to lithium cell group, satisfy the demand that needs off-grid operation at any time under the removal power consumption scene, and then very big promotion the convenience that uninterrupted power source used.
2. Through setting up UPS, a controller, the battery control box, lithium cell group, first relay, the second relay, first ac contactor and second ac contactor, be in the millet time interval when the current time, usable quick charge machine or UPS charge for lithium cell group, be in the peak time interval when the current time, use for the load with the electricity contravariant of lithium cell group, join in marriage the electric wire netting promptly and carry out the control of cutting the peak and filling the millet on the interchange side, with the power consumption of reduction alternating load to the electric wire netting, can alleviate the load of electric wire netting greatly, and utilize peak valley power consumption price difference to create economic value, very big reduction uninterrupted power source's use cost promptly.
3. Through set up the second BMS in lithium iron phosphate battery, adopt data such as voltage, electric current, temperature that solitary BMS software and hardware monitored lithium iron phosphate battery promptly, for adopting UPS self-checking in the tradition, the protection level is piled the level by the battery and is further advanced to electric core level, and data are abundanter, and the result is more accurate.
4. The charge and discharge of the lithium battery pack are controlled by the first relay, the second relay, the first alternating current contactor and the second alternating current contactor, the requirement on the UPS is lower, the UPS with most models can be compatible, and the special UPS with the peak clipping and valley filling functions is not required to be used.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram of an ups with peak clipping, valley filling, and fast charging functions according to the present invention.
Fig. 2 is a schematic block diagram of the circuit of the battery control box and the lithium battery pack of the present invention.
Fig. 3 is a schematic block circuit diagram of the sensor group of the present invention.
Fig. 4 is a flow chart of a method for using an ups with peak clipping, valley filling, and fast charging functions according to the present invention.
Description of the labeling:
100-an uninterruptible power supply with peak clipping, valley filling and quick charging functions, 1-a controller, 2-a display screen, 3-a switching power supply, 4-a UPS, 5-a battery control box, 6-a lithium battery pack, 7-a quick charger, 8-an electricity meter, 9-a first alternating current contactor, 10-a second alternating current contactor, 11-a first relay, 12-a second relay, 13-a sensor group, 51-a first BMS, 52-a third relay, 61-a lithium iron phosphate battery, 611-a second BMS, 612-an electric core, 131-a water sensor, 132-a smoke sensor, 133-an entrance guard sensor and 134-a temperature sensor.
Detailed Description
The technical scheme in the embodiment of the application has the following general idea: the lithium battery pack 6 is formed by the lithium iron phosphate battery pack 61, so that the volume and the weight are reduced, and the alternating current load is supported for a longer time to work off the network; the lithium battery pack 6 is rapidly charged through the rapid charger 7, so that the convenience of the uninterrupted power supply 100 is improved; the peak clipping and valley filling control is carried out on the alternating current side by matching with a power grid, namely on the premise of keeping the necessary capacity of the lithium battery pack 6 for power preparation, redundant battery capacity is used for releasing in the peak time period, the electric energy is stored by charging in the valley time period, and the electricity charge is reduced through the peak-valley price difference so as to reduce the use cost of the uninterruptible power supply 100.
Referring to fig. 1 to 4, a preferred embodiment of an ups 100 with peak clipping, valley filling and fast charging functions according to the present invention includes:
the controller 1 is used for controlling the uninterruptible power supply 100 and controlling the alternating current distribution circuit to realize a peak clipping and valley filling function, and in specific implementation, the controller capable of realizing the function is only required to be selected from the prior art, and is not limited to any type, such as various single-chip microcomputers, MCU computers and the like, and the control program is well known by those skilled in the art, which can be obtained by those skilled in the art without creative work;
a display screen 2 connected to the controller 1 for operating the uninterruptible power supply 100;
the switching power supply 3 is connected with the controller 1 and used for converting 220V voltage into 24V voltage to supply power to the controller 1;
a UPS4 connected to the controller 1 and the switching power supply 3; the UPS4 is also connected to a load (not shown) to provide power to the load;
the battery control box 5 is connected with the controller 1 and the UPS4 and is used for controlling the charging and discharging of the lithium battery pack 6, collecting data such as voltage, current and temperature of the lithium battery pack 6 and carrying out monitoring protection and charging and discharging protection on the lithium battery pack 6; the battery control box 5 may further include an external precharge circuit (not shown), a positive bus charge and discharge control circuit (not shown), a negative bus disconnection protection circuit (not shown), and a switching power supply (not shown) for taking power from the battery dc bus, and in specific implementation, the circuit capable of achieving the function is selected from the prior art, and is not limited to any model, which is obtainable by those skilled in the art without creative work;
the lithium battery pack 6 is connected with the battery control box 5 and used for supplying power to a load;
the quick charger 7 is connected with the battery control box 5 and used for quickly charging the lithium battery pack 6 so as to meet the mobile use scene; the quick charger 7 also determines the charge state of the lithium battery pack 6 by monitoring the voltage state of a direct current bus (not shown), and automatically enters a standby state when the voltage of the direct current bus is abnormal, so as to protect the lithium battery pack 6;
the ammeter 8 is connected with the controller 1 and used for metering electric quantity and transmitting the metered data to the controller 1 through RS 485;
a first ac contactor 9, one end of which is connected to the electric meter 8 and the other end of which is connected to the UPS4, for controlling ac main input;
one end of the second alternating current contactor 10 is connected with the first alternating current contactor 9, and the other end of the second alternating current contactor is connected with the quick charger 7 and used for controlling the quick charger 7;
one end of the first relay 11 is connected with the controller 1, and the other end of the first relay is connected with the first alternating current contactor 9 and is used for controlling the on-off of the first alternating current contactor 9;
and one end of the second relay 12 is connected with the controller 1, and the other end of the second relay is connected with the second alternating current contactor 10, and is used for controlling the on-off of the second alternating current contactor 10.
The display screen 2 is a touch display screen, which is convenient for operating the uninterruptible power supply 100.
The battery control box 5 includes:
a first BMS51 connected to the UPS4 and the lithium battery pack 6, respectively;
a third relay 52 connected to the first BMS51, the UPS4, and the lithium battery pack 6, respectively; the third relay 52 is controlled by the first BMS51 and is connected to the UPS4 and the lithium battery pack 6.
The lithium battery pack 6 includes:
a plurality of lithium iron phosphate batteries 61; each lithium iron phosphate battery 61 comprises a second BMS611 and a battery cell 612; each of the second BMS611 and the battery control box 5 are connected by a CAN bus; one end of the battery cell 612 is connected to the second BMS611, and the other end is connected to the battery control box 5. Namely, the lithium iron phosphate batteries 61 communicate with each other through CAN.
Further comprising:
and a sensor group 13 connected to the controller 1.
The sensor group 13 includes at least:
a water sensor 131 connected to the controller 1;
a smoke sensor 132 connected to the controller 1;
an entrance guard sensor 133 connected to the controller 1;
and a temperature sensor 134 connected to the controller 1.
The invention relates to a preferred embodiment of a using method of an uninterruptible power supply with peak clipping, valley filling and quick charging functions, which comprises the following steps:
step S10, electrifying and self-checking the UPS;
step S20, setting an SOC upper limit threshold, an SOC lower limit threshold and time periods corresponding to a flat time period, a valley time period and a peak time period through the display screen operation controller, and acquiring the real-time SOC of the lithium battery pack through the battery control box; SOC, i.e. the state of charge of the battery, which is defined as the percentage of the currently available capacity to the initial capacity, is used to reflect the remaining capacity of the battery;
step S30, the controller judges whether the current time is in a flat time interval, a valley time interval or a peak time interval, if the current time is in the flat time interval, the step S40 is executed; if it is the valley period, go to step S50; if the peak period is the peak period, the process proceeds to step S70;
step S40, the controller conducts the first alternating current contactor, disconnects the second alternating current contactor, slowly charges the lithium battery pack and the load through the UPS, and enters step S100 after charging is completed;
step S50, the controller judges whether the real-time SOC is smaller than or equal to an SOC upper limit threshold value, if so, the first alternating current contactor and the second alternating current contactor are conducted, the lithium battery pack is rapidly charged by a rapid charger, the load is slowly charged by a UPS, and the step S60 is carried out; if not, the controller conducts the first alternating current contactor, disconnects the second alternating current contactor, slowly charges the load through the UPS, and enters the step S100 after the charging is finished;
step S60, the controller judges whether the real-time SOC is less than or equal to the SOC upper limit threshold value, if so, the step S50 is executed; if not, the controller disconnects the second alternating current contactor, the quick charger is enabled to be in a standby state, the load is slowly charged through the UPS, and the step S100 is executed after the charging is finished;
step S70, the controller judges whether the real-time SOC is smaller than or equal to an SOC lower limit threshold, if so, the first alternating current contactor is conducted, the second alternating current contactor is disconnected, the lithium battery pack and the load are slowly charged by the UPS, and the step S100 is carried out after the charging is finished; if not, go to step S80;
step S80, disconnecting the first alternating current contactor and the second alternating current contactor, enabling the UPS to enter a power protection mode, and controlling the lithium battery pack to perform inversion discharge to charge a load through the battery control box;
step S90, the controller judges whether the real-time SOC is smaller than or equal to an SOC lower limit threshold, if so, the first alternating current contactor is conducted, the second alternating current contactor is disconnected, the lithium battery pack and the load are slowly charged by the UPS, and the step S100 is carried out after the charging is finished; if not, go to step S80;
and step S100, performing shutdown operation on the uninterrupted power supply.
The controller monitors the alternating current electric energy and the alternating current power network state through the ammeter while realizing peak clipping and valley filling and quick charging control; by monitoring the alternating current energy and combining the current control state, the controller can judge the execution condition of the issued control command and the working state of the system; by monitoring the voltage and current states of the alternating current power grid, the controller can issue a protection action command, so that the UPS enters a battery inversion state in advance, and stable and reliable alternating current electric energy is output to a load, thereby playing a role in protecting the load.
The step S10 specifically includes:
step S11, powering on the uninterrupted power supply;
step S12, the controller carries out power-on self-test, judges whether a fault exists, if yes, the step S13 is carried out; if not, go to step S20;
step S13, after the UPS is closed, fault processing is carried out, whether the fault is recovered or not is judged, if yes, the UPS is started, and the step S20 is carried out; if not, the first ac contactor and the second ac contactor are disconnected, the UPS is turned off, and the process proceeds to step S100.
In summary, the invention has the advantages that:
1. the lithium battery pack is formed by the lithium iron phosphate battery, so that compared with the traditional lead-acid battery, the lithium battery pack is smaller in size and weight, and can support alternating current load to work off the grid for a longer time; through setting up quick charge machine, can carry out quick charge to lithium cell group, satisfy the demand that needs off-grid operation at any time under the removal power consumption scene, and then very big promotion the convenience that uninterrupted power source used.
2. Through setting up UPS, a controller, the battery control box, lithium cell group, first relay, the second relay, first ac contactor and second ac contactor, be in the millet time interval when the current time, usable quick charge machine or UPS charge for lithium cell group, be in the peak time interval when the current time, use for the load with the electricity contravariant of lithium cell group, join in marriage the electric wire netting promptly and carry out the control of cutting the peak and filling the millet on the interchange side, with the power consumption of reduction alternating load to the electric wire netting, can alleviate the load of electric wire netting greatly, and utilize peak valley power consumption price difference to create economic value, very big reduction uninterrupted power source's use cost promptly.
3. Through set up the second BMS in lithium iron phosphate battery, adopt data such as voltage, electric current, temperature that solitary BMS software and hardware monitored lithium iron phosphate battery promptly, for adopting UPS self-checking in the tradition, the protection level is piled the level by the battery and is further advanced to electric core level, and data are abundanter, and the result is more accurate.
4. The charge and discharge of the lithium battery pack are controlled by the first relay, the second relay, the first alternating current contactor and the second alternating current contactor, the requirement on the UPS is lower, the UPS with most models can be compatible, and the special UPS with the peak clipping and valley filling functions is not required to be used.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (8)
1. The utility model provides an uninterrupted power source who possesses peak clipping and valley filling and fill function soon which characterized in that: the method comprises the following steps:
a controller;
the display screen is connected with the controller;
the switching power supply is connected with the controller;
the UPS is connected with the controller and the switching power supply;
the battery control box is connected with the controller and the UPS;
the lithium battery pack is connected with the battery control box;
the quick charger is connected with the battery control box;
the ammeter is connected with the controller;
one end of the first alternating current contactor is connected with the ammeter, and the other end of the first alternating current contactor is connected with the UPS;
one end of the second alternating current contactor is connected with the first alternating current contactor, and the other end of the second alternating current contactor is connected with the quick charger;
one end of the first relay is connected with the controller, and the other end of the first relay is connected with the first alternating current contactor;
and one end of the second relay is connected with the controller, and the other end of the second relay is connected with the second alternating current contactor.
2. The ups of claim 1, wherein: the display screen is a touch display screen.
3. The ups of claim 1, wherein: the battery control box includes:
the first BMS is respectively connected with the UPS and the lithium battery pack;
and the third relay is respectively connected with the first BMS, the UPS and the lithium battery pack.
4. The ups of claim 1, wherein: the lithium battery pack includes:
a plurality of lithium iron phosphate batteries; each lithium iron phosphate battery comprises a second BMS and a battery cell; each second BMS and the battery control box are connected through a CAN bus; and one end of the battery cell is connected with the second BMS, and the other end of the battery cell is connected with the battery control box.
5. The ups of claim 1, wherein: further comprising:
and the sensor group is connected with the controller.
6. The ups of claim 5, wherein: the sensor group comprises at least:
the water logging sensor is connected with the controller;
a smoke sensor connected with the controller;
the entrance guard sensor is connected with the controller;
and the temperature sensor is connected with the controller.
7. A method for using an uninterruptible power supply with peak clipping, valley filling and quick charging functions is characterized in that: the method requires the use of an uninterruptible power supply as claimed in any of claims 1 to 6, comprising the steps of:
step S10, electrifying and self-checking the UPS;
step S20, setting an SOC upper limit threshold, an SOC lower limit threshold and time periods corresponding to a flat time period, a valley time period and a peak time period by the controller, and acquiring the real-time SOC of the lithium battery pack through the battery control box;
step S30, the controller judges whether the current time is in a flat time interval, a valley time interval or a peak time interval, if the current time is in the flat time interval, the step S40 is executed; if it is the valley period, go to step S50; if the peak period is the peak period, the process proceeds to step S70;
step S40, the controller conducts the first alternating current contactor, disconnects the second alternating current contactor, slowly charges the lithium battery pack and the load through the UPS, and enters step S100 after charging is completed;
step S50, the controller judges whether the real-time SOC is smaller than or equal to an SOC upper limit threshold value, if so, the first alternating current contactor and the second alternating current contactor are conducted, the lithium battery pack is rapidly charged by a rapid charger, the load is slowly charged by a UPS, and the step S60 is carried out; if not, the controller conducts the first alternating current contactor, disconnects the second alternating current contactor, slowly charges the load through the UPS, and enters the step S100 after the charging is finished;
step S60, the controller judges whether the real-time SOC is less than or equal to the SOC upper limit threshold value, if so, the step S50 is executed; if not, the controller disconnects the second alternating current contactor, the quick charger is enabled to be in a standby state, the load is slowly charged through the UPS, and the step S100 is executed after the charging is finished;
step S70, the controller judges whether the real-time SOC is smaller than or equal to an SOC lower limit threshold, if so, the first alternating current contactor is conducted, the second alternating current contactor is disconnected, the lithium battery pack and the load are slowly charged by the UPS, and the step S100 is carried out after the charging is finished; if not, go to step S80;
step S80, disconnecting the first alternating current contactor and the second alternating current contactor, enabling the UPS to enter a power protection mode, and controlling the lithium battery pack to perform inversion discharge to charge a load through the battery control box;
step S90, the controller judges whether the real-time SOC is smaller than or equal to an SOC lower limit threshold, if so, the first alternating current contactor is conducted, the second alternating current contactor is disconnected, the lithium battery pack and the load are slowly charged by the UPS, and the step S100 is carried out after the charging is finished; if not, go to step S80;
and step S100, performing shutdown operation on the uninterrupted power supply.
8. The method of claim 7, wherein the uninterruptible power supply with peak clipping, valley filling and fast charging functions is used as follows: the step S10 specifically includes:
step S11, powering on the uninterrupted power supply;
step S12, the controller carries out power-on self-test, judges whether a fault exists, if yes, the step S13 is carried out; if not, go to step S20;
step S13, after the UPS is closed, fault processing is carried out, whether the fault is recovered or not is judged, if yes, the UPS is started, and the step S20 is carried out; if not, the first ac contactor and the second ac contactor are disconnected, the UPS is turned off, and the process proceeds to step S100.
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