CN107171401B - Double auxiliary power supply and energy storage system based on same - Google Patents
Double auxiliary power supply and energy storage system based on same Download PDFInfo
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- CN107171401B CN107171401B CN201710535164.8A CN201710535164A CN107171401B CN 107171401 B CN107171401 B CN 107171401B CN 201710535164 A CN201710535164 A CN 201710535164A CN 107171401 B CN107171401 B CN 107171401B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 60
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 230000007958 sleep Effects 0.000 claims abstract description 24
- 230000005059 dormancy Effects 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 18
- 238000010277 constant-current charging Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 claims 6
- 230000004044 response Effects 0.000 abstract description 6
- 230000003993 interaction Effects 0.000 description 10
- 238000007600 charging Methods 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- 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
-
- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention discloses a double auxiliary power supply and an energy storage system based on the same, wherein the double auxiliary power supply comprises a main control module, a main auxiliary power supply and a dormancy auxiliary power supply; the main control module controls the main auxiliary power supply through the switch control unit; the main control module is also connected with a trigger detection circuit; the trigger detection circuit is powered by the sleep auxiliary power supply; the main auxiliary power supply outputs a control signal to the energy conversion module. The sleep auxiliary power supply is always in a working state, (1) the trigger detection circuit does not detect a trigger signal or the trigger signal fails, and the main auxiliary power supply is in a locking state under the control of the switch control unit; (2) After the trigger detection circuit detects the trigger signal or the main control module receives a starting instruction, the main auxiliary power supply is in a working state under the control of the switch control unit. The energy storage system based on the double auxiliary power supplies can save standby energy and is quick in response.
Description
Technical Field
The invention relates to a double auxiliary power supply and an energy storage system based on the double auxiliary power supply.
Background
At present, most energy storage systems only intervene in work to play a role when power is interrupted or people need to use the energy storage systems. Under normal conditions, the energy storage system is in a non-operating state, in which no or as little power consumption as possible is required of the energy storage system. Currently most energy storage systems are in two ways: firstly, a mechanical switch is adopted, when an energy storage system is not needed, the mechanical switch is disconnected, the energy storage system does not work at all, the cost is high, particularly in high-current occasions, the price of the mechanical switch is quite high, in addition, the response is not timely, and the operation is complex; and the second mode is a direct standby mode, and the mode has the advantages of large standby power consumption, extremely large energy loss, increased charge and discharge cycle times of the energy storage battery and influence on the service life of the battery due to the fact that a single auxiliary power supply is sampled. Therefore, it is necessary to design a new auxiliary power supply and energy storage system.
Disclosure of Invention
The invention aims to solve the technical problem of providing a double auxiliary power supply and an energy storage system based on the double auxiliary power supply, which can save energy to be consumed and are quick in response.
The technical proposal of the invention is as follows:
a dual auxiliary power supply comprises a main control module, a main auxiliary power supply and a dormant auxiliary power supply;
the main auxiliary power supply and the dormant auxiliary power supply are powered by an energy storage battery;
the main auxiliary power supply and the dormancy auxiliary power supply are respectively connected with 2 power supply ends of the main control module;
the main control module controls the main auxiliary power supply through the switch control unit;
the main control module is also connected with a trigger detection circuit; the trigger detection circuit is powered by the sleep auxiliary power supply;
the main auxiliary power supply outputs a control signal to the energy conversion module.
The sleep auxiliary power supply is always in a working state, and the double auxiliary power supplies work in the following two stages according to signals detected by the trigger detection circuit or instructions received by the main control module:
(1) The trigger detection circuit does not detect a trigger signal or the trigger signal fails, and the main and auxiliary power supplies are in a locking state under the control of the switch control unit;
(2) After the trigger detection circuit detects the trigger signal or the main control module receives a starting instruction, the main auxiliary power supply is in a working state under the control of the switch control unit.
The signal detected by the trigger detection circuit is a key-on signal or a power grid interrupt signal when a user presses a key.
The switch control unit comprises a PMOS tube Q13, an NMOS tube Q16 and a PNP triode Q24;
SPS_CNTL is a main auxiliary power supply control enabling control signal and is connected with the b pole of the triode Q24 in a terminating mode; the c electrode of the triode Q24 is grounded; a resistor R68 is connected between the e pole of the triode Q24 and the SPS_CNTL end; a resistor R67 is connected between the e pole and the c pole of the triode Q24;
the e pole of the triode Q24 is also connected with the G pole of the NMOS tube Q16; the S electrode of the NMOS tube Q16 is grounded; the D pole of the NMOS tube Q16 is connected with the G pole of the PMOS tube Q13 through a resistor R65;
the S electrode of the PMOS tube Q13 is connected with a BAT+ end (BAT+ can be the voltage of an energy storage battery); the D electrode of the PMOS tube Q13 is used for supplying power to the main auxiliary power supply, namely the D electrode of the PMOS tube Q13 is connected with the power input end of the main auxiliary power supply; a resistor R59 is connected between the D pole and the S pole of the PMOS tube Q13.
The main auxiliary power supply and the sleep auxiliary power supply are integrated circuits based on LDO (LDO is low dropout regulator, is a low dropout linear voltage regulator), and the static standby current of the sleep auxiliary power supply is uA level.
The main auxiliary power supply and the dormant auxiliary power supply both output 5V voltage.
The main control module is also connected with a communication circuit.
An energy storage system based on double auxiliary power supplies comprises an energy storage battery, an energy conversion circuit and the double auxiliary power supplies;
the energy storage circuit supplies power to electric equipment or a power grid through the energy conversion circuit; the energy conversion circuit is controlled by the main auxiliary power supply.
The energy storage battery is also connected with a charging circuit.
The main control module is also connected with a control circuit, a sampling circuit, an alarm circuit, a man-machine interaction circuit and a communication circuit;
the control circuit: the control center of the whole energy storage system receives signals collected by the sampling circuit and instructions and information of the communication circuit, the control circuit responds to the signals, the instructions and the information after processing, the communication circuit (communication module) sends the instructions and the information, meanwhile, status information of the energy storage system is displayed, control signals are provided for an electronic switch of the double auxiliary power supplies, the status is switched, and control signals are provided for a first DC-DC converter, a second DC-DC converter, an inverter and an electronic switch of the charging input of the energy conversion system. The control circuit generally adopts MCU, is the prior art of maturing.
And a sampling circuit: the method comprises the steps of collecting signals, namely collecting voltage, current, charging input voltage and current of a battery pack of an energy storage system, and information such as input voltage and current, output voltage and current, protection state and the like of a first DC-DC converter, a second DC-DC converter and an inverter of an energy conversion system;
and an alarm circuit: when the signal acquired by the acquisition circuit is abnormal, the control circuit transmits the abnormal state of the energy storage system to a user in the form of an acousto-optic signal through the alarm circuit.
Communication circuit: the control circuit transmits the state signal of the double auxiliary power supplies to the upper computer or the remote control center through the communication circuit, and is used for receiving the control instruction of the upper computer or the remote control center, and meanwhile, the voltage, the current, the temperature and the protection state information of the energy storage battery are obtained through the communication circuit.
The man-machine interaction circuit refers to devices such as a display screen, a keyboard and the like.
The invention designs a main auxiliary power supply and a dormant auxiliary power supply. The main and auxiliary power supplies are connected with the main control circuit, the energy conversion system, the control circuit, the sampling circuit, the alarm circuit, the communication circuit, the man-machine interaction circuit and other circuit modules to provide power supplies required by the normal operation of the circuit modules. The sleep auxiliary power supply is connected with the main control circuit and the trigger detection circuit and provides power supply required by the system when the system enters the sleep mode.
The main and auxiliary power supplies have larger power consumption, but have stronger load capacity, and can meet the energy required by the full-load operation of circuit modules such as a main control circuit, an energy conversion system, a control circuit, a sampling circuit, an alarm circuit, a communication circuit, a man-machine interaction circuit and the like. The sleep auxiliary power supply has extremely low standby power consumption, and the static standby current is only of uA level, but the energy provided by the sleep auxiliary power supply is enough to meet the power requirements of the main control circuit and the trigger detection circuit in the sleep state.
The energy storage system is always in a dormant state when not in use. When a user presses a key to start or sends a starting instruction or the power grid is interrupted, the main control circuit turns on the main auxiliary power supply through the switch control when the energy storage system is switched from the standby sleep state to the working state, and the main auxiliary power supply supplies power to the main control circuit, the energy conversion system, the control circuit, the sampling circuit, the alarm circuit, the communication circuit, the man-machine interaction circuit and other circuit modules to supply power, so that the energy storage system rapidly enters the working state.
When a user presses a key to shut down or sends a shutdown instruction or the power grid is restored to be normal, the main control circuit prohibits the main auxiliary power supply from working through switch control when the energy storage system enters a standby dormant state from a working state, and at the moment, the circuit modules such as the energy conversion system, the control circuit, the sampling circuit, the alarm circuit, the communication circuit, the man-machine interaction circuit and the like do not have power supply, are in a non-working state and do not consume any electric quantity. And meanwhile, the main control module can enter a dormant state, and only the external interrupt trigger module is opened for responding to the trigger detection circuit, and the standby current of the main control module is within the uA level. When the energy storage system is in a standby dormant state, only the main control module and the trigger detection circuit in the system are in an operation state, standby current is in uA level, and the power supply of the dormant auxiliary power supply is sufficient to provide the electric quantity requirement.
The design can meet the auxiliary power supply required by the normal operation of the energy storage system and the low power consumption requirement of the energy storage system in a standby dormant state, thereby reducing energy loss. The trigger detection circuit is in a working state in the standby sleep mode, so that the timeliness of the response of the energy storage system is ensured.
The beneficial effects are that:
compared with the prior art, the double auxiliary power supply and the energy storage system based on the double auxiliary power supply use the design of the double auxiliary power supplies, and auxiliary power supplies with different design requirements are used in a working state and a standby dormant state, so that the problems of high cost and untimely response of using a mechanical switch and the problem of energy loss of a single auxiliary power supply are solved. The dual auxiliary power supply design can meet the energy required by the normal operation of the energy storage system and the low power consumption requirement of the energy storage system in a standby sleep state, so that the energy loss is reduced. The trigger detection circuit is in a working state in the standby sleep mode, so that the timeliness of the response of the energy storage system is ensured.
Drawings
FIG. 1 is a general block diagram of an energy storage system based on dual auxiliary power sources;
FIG. 2 is a schematic diagram of a switching section, a main auxiliary power supply, and a sleep auxiliary power supply section in a dual auxiliary power supply;
FIG. 3 is a schematic diagram of a constant current charging circuit;
fig. 4 is a schematic diagram of a constant current charging circuit.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples:
example 1: 1-2, a dual auxiliary power supply comprises a main control module, a main auxiliary power supply and a sleep auxiliary power supply;
the main auxiliary power supply and the dormant auxiliary power supply are powered by an energy storage battery;
the main auxiliary power supply and the dormancy auxiliary power supply are respectively connected with 2 power supply ends of the main control module;
the main control module controls the main auxiliary power supply through the switch control unit;
the main control module is also connected with a trigger detection circuit; the trigger detection circuit is powered by the sleep auxiliary power supply;
the main auxiliary power supply outputs a control signal to the energy conversion module.
The sleep auxiliary power supply is always in a working state, and the double auxiliary power supplies work in the following two stages according to signals detected by the trigger detection circuit or instructions received by the main control module:
(1) The trigger detection circuit does not detect a trigger signal or the trigger signal fails, and the main and auxiliary power supplies are in a locking state under the control of the switch control unit;
(2) After the trigger detection circuit detects the trigger signal or the main control module receives a starting instruction, the main auxiliary power supply is in a working state under the control of the switch control unit.
The signal detected by the trigger detection circuit is a key-on signal or a power grid interrupt signal when a user presses a key.
The switch control unit comprises a PMOS tube Q13, an NMOS tube Q16 and a PNP triode Q24;
SPS_CNTL is a main auxiliary power supply control enabling control signal and is connected with the b pole of the triode Q24 in a terminating mode; the c electrode of the triode Q24 is grounded; a resistor R68 is connected between the e pole of the triode Q24 and the SPS_CNTL end; a resistor R67 is connected between the e pole and the c pole of the triode Q24;
the e pole of the triode Q24 is also connected with the G pole of the NMOS tube Q16; the S electrode of the NMOS tube Q16 is grounded; the D pole of the NMOS tube Q16 is connected with the G pole of the PMOS tube Q13 through a resistor R65;
the S electrode of the PMOS tube Q13 is connected with a BAT+ end (BAT+ can be the voltage of an energy storage battery); the D electrode of the PMOS tube Q13 is used for supplying power to the main auxiliary power supply, namely the D electrode of the PMOS tube Q13 is connected with the power input end of the main auxiliary power supply; a resistor R59 is connected between the D pole and the S pole of the PMOS tube Q13.
The main auxiliary power supply and the sleep auxiliary power supply are integrated circuits based on LDO (LDO is low dropout regulator, is a low dropout linear voltage regulator), and the static standby current of the sleep auxiliary power supply is uA level.
The main auxiliary power supply and the dormant auxiliary power supply both output 5V voltage.
The main control module is also connected with a communication circuit.
An energy storage system based on double auxiliary power supplies comprises an energy storage battery, an energy conversion circuit and the double auxiliary power supplies;
the energy storage circuit supplies power to electric equipment or a power grid through the energy conversion circuit; the energy conversion circuit is controlled by the main auxiliary power supply.
The energy storage battery is also connected with a charging circuit.
The energy conversion circuit is a DC-DC conversion circuit or a DC-AC inverter circuit.
Description of the schematic definition in fig. 2:
BAT + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -.
SPS_CNTL is the main auxiliary power control enable control signal.
SPS_Work-main auxiliary power is provided for power supplies of modules such as a main control circuit, an energy conversion system, a control circuit, a sampling circuit, an alarm circuit, a communication circuit, a man-machine interaction circuit and the like.
SPS_sleep, sleep auxiliary power is provided to the main control circuit and trigger detected power supply.
U6- -the quiescent standby current is a linear LDO of uA level, preferably a finely processed S812C50AMC-C3E-T2G, the output voltage is +5Vdc, and U6 and peripheral circuits thereof supply power to a main control circuit and a trigger detection module of the energy storage system in a dormant state.
U7- - -linear LDO with extremely strong load capacity, preferably LM1117IDTX-5.0 of TI company, the output voltage is +5.0vdc, U7 and peripheral circuit thereof meet the power supply requirement of modules such as a main control circuit, an energy conversion system, a control circuit, a sampling circuit, an alarm circuit, a communication circuit, a man-machine interaction circuit and the like when the energy storage system works normally.
Q13-PMOS tube used as electronic switch, the selected PMOS tube satisfies V DS Greater than 30V, I D (A) Greater than 2A, in the present invention, IRLML9301TRPBF of IR is preferred.
Description of control principle:
when the energy storage system is in a dormant state, the dormant auxiliary power supply supplies power to the main control circuit and the trigger detection module of the energy storage system in the dormant state, and at the moment, the power consumption of the whole energy storage system is at the uA level, the standby power consumption is extremely low, and the energy consumption is greatly reduced. When the trigger detection module detects that a user presses a key to start or sends a starting instruction or power grid interruption, the trigger detection module wakes up the main control module in a dormant state, the main control module sets SPS_CNTL high, and after Q13 is opened and Q13 is conducted, the main auxiliary power supply works to supply power to the modules such as the main control circuit, the energy conversion system, the control circuit, the sampling circuit, the alarm circuit, the communication circuit, the man-machine interaction circuit and the like, and the energy storage system enters a working state. When the energy storage system is closed, the SPS_CNTL is set low by the main control circuit, the Q13 is closed, the main auxiliary power supply stops working, at the moment, the energy conversion system, the control circuit, the sampling circuit, the alarm circuit, the communication circuit, the man-machine interaction circuit and other modules also stop working, at the moment, the energy storage system enters a dormant state, the standby power consumption of the energy storage system is greatly reduced, at the moment, the trigger detection module is still powered by the dormant auxiliary power supply, and can detect external excitation signals such as a starting signal and the like, so that the main control module is triggered to enter a working state, and the real-time responsiveness of the energy storage system is ensured.
The constant current charging circuit is shown in fig. 3-4, and each element or reference numeral indicates:
VIN+ is the positive electrode of the input power.
VIN-input power negative electrode.
Vout+ - - - -the positive pole of the output power.
Vout— negative electrode of the output power supply.
VREF+ positive electrode of reference power supply
C1 is the input filter capacitance.
C2 is the output filter capacitance.
C3 is current sampling feedback filtering.
R1, R2, R5 and C3 form a current sampling feedback circuit.
R3 and R4 are voltage sampling feedback circuits.
D1 is an isolation diode.
Description of working principle:
and a stable reference power supply is used as a reference voltage, and R1, R2 and R5 are adopted to divide the voltage to obtain a voltage equal to FB, so that the internal PWM of the DCDC IC is adjusted through the FB to control the magnitude of the output current. For example, when the output current increases, the voltage across the sampling resistor R5 increases, and since vrfe+ is a fixed value, FB voltage increases, FB increases, and the duty cycle decreases, so that the output current decreases, and a complete feedback is completed, thereby achieving the purpose of stabilizing the current output.
Constant current calculation:
let R5 be VIo, and the output current be Io
The reference voltage is vref+=2.5v,
FB voltage is vfb=0.6v,
R5＝0.1Ω，R1＝40KΩ，R2＝10KΩ
then:
VIo＝Io*R5
VFB＝VIo+((VREF+-VIo)*R2/(R1+R2))
and (3) calculating:
Io＝(VFB*(R1+R2)-R2*VREF+)/R1*R5
equation if k= (VFB (r1+r2) -r2 vref+)/R1
Io＝K/R5
From the calculation formula, io output current has no relation with output voltage and input voltage, but only relates to vfb.r1, R2, VREF, and these parameters are all fixed in specific design (VFB is fixed at steady state, for the fp7192 constant voltage chip, the steady state value is 0.6 v), so K must be a fixed value, so the formula:
io=k/R5 has excellent linearity and has excellent controllability.
The specific values set above can be given by the above parameters:
Io＝(VFB*(R1+R2)-R2*VREF+)/R1*R5
＝(0.6*(40+10)-10*2.5)/40*0.1
＝1.25A
constant voltage chip with cost of about 0.8 yuan
From the above equation, it can be seen that this scheme introduces a fixed VREF+, so that Io becomes an equation that is only linear with the R5 sampling resistor, and Io becomes constant, thereby achieving the purpose of constant current.
The reference voltage constant current method is characterized in that:
1. and stable fixed VREF+ voltage is used, so that the precision control and stability control are facilitated.
2. The current sampling is changed into resistor voltage division feedback, so that the method is simpler and more reliable.
3. The applicability is wide, and any circuit needing constant current can be used.
4. The cost is greatly reduced, and the cost is about 1/3 of that of 12V/1A output by using an IC constant current scheme.
The constant current charging circuit is a brand new constant current implementation scheme. The core is that constant current is realized by using a constant voltage chip. In addition, the output current can be flexibly set, and the flexibility is good. Compared with the prior constant current chip, the application effect is better. Practice shows that the charging circuit has outstanding control effect and obviously reduced cost.
Claims (1)
1. An energy storage system based on double auxiliary power supplies is characterized by comprising an energy storage battery, an energy conversion circuit and the double auxiliary power supplies;
the double auxiliary power supply comprises a main control module, a main auxiliary power supply and a dormancy auxiliary power supply;
the main auxiliary power supply and the dormant auxiliary power supply are powered by an energy storage battery;
the main auxiliary power supply and the dormancy auxiliary power supply are respectively connected with 2 power supply ends of the main control module;
the main control module controls the main auxiliary power supply through the switch control unit;
the main control module is also connected with a trigger detection circuit; the trigger detection circuit is powered by the sleep auxiliary power supply;
the main auxiliary power supply outputs a control signal to the energy conversion circuit;
the sleep auxiliary power supply is always in a working state, and the double auxiliary power supplies work in the following two stages according to signals detected by the trigger detection circuit or instructions received by the main control module:
(1) The trigger detection circuit does not detect a trigger signal or the trigger signal fails, and the main and auxiliary power supplies are in a locking state under the control of the switch control unit;
(2) After the trigger detection circuit detects the trigger signal or the main control module receives a starting instruction, the main auxiliary power supply is in a working state under the control of the switch control unit;
the signal detected by the trigger detection circuit is a key-on signal or a power grid interrupt signal when a user presses a key;
the switch control unit comprises a PMOS tube Q13, an NMOS tube Q16 and a PNP triode Q24;
SPS_CNTL is a main auxiliary power supply control enabling control signal and is connected with the b pole of the triode Q24 in a terminating mode; the c electrode of the triode Q24 is grounded; a resistor R68 is connected between the e pole of the triode Q24 and the SPS_CNTL end; a resistor R67 is connected between the e pole and the c pole of the triode Q24;
the e pole of the triode Q24 is also connected with the G pole of the NMOS tube Q16; the S electrode of the NMOS tube Q16 is grounded; the D pole of the NMOS tube Q16 is connected with the G pole of the PMOS tube Q13 through a resistor R65;
the S electrode of the PMOS tube Q13 is connected with the BAT+ end of the power supply voltage; d of the PMOS tube Q13 is used for supplying power for a main auxiliary power supply; a resistor R59 is connected between the D pole and the S pole of the PMOS tube Q13;
the main auxiliary power supply and the dormancy auxiliary power supply are integrated circuits based on LDO, and the static standby current of the dormancy auxiliary power supply is uA level;
the main auxiliary power supply and the dormant auxiliary power supply both output 5V voltage;
the main control module is also connected with a communication circuit;
the energy storage circuit supplies power to electric equipment or a power grid through the energy conversion circuit; the energy conversion circuit is controlled by the main auxiliary power supply;
the energy storage battery is also connected with a constant current charging circuit;
the energy conversion circuit is a DC-DC conversion circuit or a DC-AC inverter circuit;
constant current charging circuit:
description of the elements or labels:
VIN+ is the positive electrode of the input power supply;
VIN-input power negative electrode;
vout+ - - - - - -the positive electrode of the output power supply;
vout— negative electrode of the output power supply;
VREF+ being the positive electrode of the reference power supply;
c1 is an input filter capacitor;
c2 is an output filter capacitor;
c3 is a current sampling feedback filter capacitor;
r1, R2, R5 and C3 form a current sampling feedback circuit;
r3 and R4 are voltage sampling feedback circuits;
d1 is an isolation diode;
the positive pole VIN+ of the input power supply is connected with the power supply input end of the DC-DC IC;
the negative electrode VIN-of the input power supply is short-circuited with the negative voltage output end of the DC-DC IC and then connected with the negative electrode VOUT-of the output power supply through a resistor R5;
the positive pole VREF+ of the reference power supply is connected with the FB end of the DC-DC IC through a resistor R1;
a resistor R2 is connected between the FB end of the DC-DC IC and the negative pole VOUT of the output power supply in a bridging way;
the positive voltage output end of the DC-DC IC is the positive electrode VOUT+ of the output power supply;
the output power supply cathode VOUT-is connected with the input power supply cathode VIN-through a resistor R3 and a resistor R4 which are sequentially connected in series;
the connection point of the resistor R3 and the resistor R4 is connected with the anode of the isolation diode D1; the negative electrode of the isolation diode D1 is connected with the FB end of the DC-DC IC;
an input filter capacitor C1 is connected between the positive electrode VIN+ of the input power supply and the negative electrode VIN-of the input power supply;
an output filter capacitor C2 is connected between the positive pole VOUT+ of the output power supply and the negative pole VOUT-of the power supply;
a current sampling feedback filter capacitor C3 is connected between the FB end of the DC-DC IC and the negative electrode VIN-of the input power supply;
description of working principle:
the stable reference power supply is used as a reference voltage, and resistors R1, R2 and R5 are used for dividing the voltage to obtain a voltage equal to FB, so that the internal PWM of the DC-DC IC is adjusted through FB to control the magnitude of output current; when the output current is large, the voltage on the sampling resistor R5 is increased, and the VRFE+ is a fixed value, so that the FB voltage is large, the FB is large, the duty ratio is reduced, the output current is reduced, and the purpose of stabilizing the current output is achieved.
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| CN107749632B (en) * | 2017-10-18 | 2020-06-02 | 珠海格力电器股份有限公司 | Energy storage system and control method thereof |
| CN108110835B (en) * | 2017-12-27 | 2023-11-24 | 苏州易美新思新能源科技有限公司 | Low-power consumption control circuit for high-voltage battery system |
| CN108899977B (en) * | 2018-08-31 | 2020-01-07 | 西安特锐德智能充电科技有限公司 | Bidirectional charging device and auxiliary power supply method thereof |
| CN109861521A (en) * | 2019-03-28 | 2019-06-07 | 常州索维尔电子科技有限公司 | Vehicle-mounted low pressure auxiliary power circuit |
| CN113938991B (en) * | 2020-06-29 | 2023-09-26 | 大唐移动通信设备有限公司 | Base station radio frequency unit and dormancy awakening method thereof |
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