CN103269105A - Self-control multi-voltage output system of reserve power supply - Google Patents

Self-control multi-voltage output system of reserve power supply Download PDF

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CN103269105A
CN103269105A CN2013102112609A CN201310211260A CN103269105A CN 103269105 A CN103269105 A CN 103269105A CN 2013102112609 A CN2013102112609 A CN 2013102112609A CN 201310211260 A CN201310211260 A CN 201310211260A CN 103269105 A CN103269105 A CN 103269105A
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semiconductor
oxide
metal
power supply
output
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CN103269105B (en
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杨文俊
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DONGGUAN KEXIANG PHOTOELECTRIC TECHNOLOGY Co Ltd
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DONGGUAN KEXIANG PHOTOELECTRIC TECHNOLOGY Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The invention discloses a self-control multi-voltage output system of a reserve power supply. The self-control multi-voltage output system of the reserve power supply comprises an electric supply charging unit, a solar energy charging unit, a storage battery pack, a charging and discharging protective module and a power output unit. The electric supply charging unit and the solar energy charging unit charge the storage battery pack through the charging and discharging protective unit in an alternative mode, and the output end of the charging and discharging protective unit is connected with the input end of the power output unit and conducts discharging management on electric energy of the storage battery pack. The power output unit comprises a first direct-current power output circuit, a second direct-current power output circuit, a third direct-current power output circuit and an alternating-current power output circuit, wherein the first direct-current power output circuit is used for outputting a 5V-to-36V direct-current voltage, the second direct-current power output circuit is used for outputting a 4V-to-6V direct-current voltage, the third direct-current power output circuit is used for outputting a 10V-to-14V direct-current voltage, and the alternating-current power output circuit is used for outputting an AC220V/50Hz alternating-current voltage. The self-control multi-voltage output system of the reserve power supply has a solar energy charging function and an electric supply charging function, can achieve a multi-voltage output function and integrate a plurality of types of common voltages, and is convenient to carry.

Description

Certainly the control multivoltage output system of stand-by power supply
Technical field
The present invention relates to power-supply device, more particularly, relate to a kind of multivoltage of control certainly output system of stand-by power supply.
Background technology
Along with the application of consumer electronics product in people's daily life is more and more, as: notebook computer, MP3, MP4, mobile phone, digital camera etc., this consumer electronics product have become an indispensable part in people's life.Increasing along with consumer electronics product, the thing followed just produces a problem, consumer electronics product of the prior art is to adopt lithium battery to power mostly, inevitably can produce when using half, and lithium battery does not have the situation of electricity suddenly.Though various electronic products generally all can be equipped with a charger, but, because each electronic product required voltage height is different, and the power interface of various electronic products also is not quite similar, so, have no idea to accomplish the general of charger, go on business, travel if carry a plurality of electronic products, will carry a plurality of chargers simultaneously, cause a lot of inconvenience.Simultaneously, present consumer electronics product charger all only has voltage transitions and charge function, is not having the situation of external power supply, and it is helpless just to seem.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective of the prior art, provide a kind of and have civil power and function of solar charging and integrate multiple common voltage in the multivoltage of the control certainly output system of the stand-by power supply of one.
For achieving the above object; technical scheme provided by the invention is as follows: a kind of multivoltage of control certainly output system of stand-by power supply; it comprises commercial power charged unit; the solar charging electric unit; batteries; charge and discharge protecting unit and power supply output unit; described commercial power charged unit and described solar charging electric unit charge to described batteries to select a mode by described charge and discharge protecting unit; the output of described charge and discharge protecting unit is connected with the input of described power supply output unit and to the management of discharging of the electric energy of described batteries, described power supply output unit comprises:
The first DC power supply output circuit is used for that the direct voltage after the described batteries discharge is become 5~36V direct voltage by synchronization lifting pressure mode and uses for external loading;
The second DC power supply output circuit is used for that the direct voltage after the described batteries discharge is become 10~14V direct voltage by the synchronous buck mode and uses for external loading;
The 3rd DC power supply output circuit is used for that the direct voltage after the described batteries discharge is become 4~6V direct voltage by the synchronous buck mode and uses for external loading; And
The AC power output circuit uses for external loading for the alternating voltage that the direct voltage after the described batteries discharge is converted to AC220V/50Hz.
Compared with prior art, beneficial effect of the present invention is:
1, the present invention possesses solar recharging and commercial power charged function, and is practical, easy to carry, can carry out outdoor work, and as under the environment of fine day, the solar charging electric energy with the batteries abundance, commercial power chargedly can be finished charging in 3~4 hours in 5 hours.
2, power supply output unit of the present invention comprises the first DC power supply output circuit for output 5~36V direct voltage, the second DC power supply output circuit that is used for output 4~6V direct voltage, the AC power output circuit that is used for exporting the 3rd DC power supply output circuit of 10~14V direct voltage and is used for output AC220V/50Hz alternating voltage, can realize the multivoltage output function, integrate multiple common voltage in one, can satisfy all and use DC20V, DC5V, the electronic product power supply of DC12V, the alternating voltage of AC220V/50Hz meets the voltage standard of China, can satisfy power is that 500W uses with interior electronic product, can drive 400W with interior inductive load (as motor).
Description of drawings
Fig. 1 is circuit structure block diagram of the present invention.
Fig. 2 is the circuit theory diagrams of commercial power charged unit of the present invention.
Fig. 3 is the circuit theory diagrams of MPPT circuit of the present invention.
Fig. 4 is the circuit theory diagrams of batteries of the present invention.
Fig. 5 is the circuit theory diagrams of charge and discharge protecting of the present invention unit.
Fig. 6 is the circuit theory diagrams of display unit of the present invention.
Fig. 7 is the circuit theory diagrams of the first DC power supply output circuit of the present invention.
Fig. 8 is the circuit theory diagrams of the second DC power supply output circuit of the present invention.
Fig. 9 is the circuit theory diagrams of the 3rd DC power supply output circuit of the present invention.
Figure 10 is the circuit theory diagrams of AC power output circuit of the present invention.
Embodiment
In order to set forth thought of the present invention and purpose, the present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, there is shown a kind of multivoltage of control certainly output system of stand-by power supply, it comprises commercial power charged unit 1, solar charging electric unit 2, batteries 3, charge and discharge protecting unit 4, power supply output unit 5 and display unit 6.Certainly the control multivoltage output system of this stand-by power supply has civil power and function of solar charging and integrates multiple common voltage in one.
As shown in Figure 2, commercial power charged unit 1 comprises rectifier 11, pwm chip N5, metal-oxide-semiconductor Q19, transformer 12, optical coupler 13 and constant current/constant voltage device 14.Commercial power charged unit 1 converts the input voltage of AC100-240V to DC21.6V/6A output, and batteries 3 is charged, and possesses the constant current constant voltage function.Because commercial power charged unit 1 is prior art, does not repeat them here.
As shown in Figure 3, solar charging electric unit 2 is made up of solar panels 21 and MPPT circuit 22, the generating voltage of MPPT circuit 22 detecting real-time solar panels 21, and follow the trail of the ceiling voltage current value, with the highest efficient to battery charging.Wherein, the voltage of solar panels 21 outputs is 21~27V, MPPT circuit 22 comprises pwm chip N4, metal-oxide-semiconductor Q9, Q10, resistance R 5, inductance L 4, capacitor C 10, C11 and diode D1, pwm chip N4 respectively with metal-oxide-semiconductor Q9, the grid of Q10 connects and output drive signal control metal-oxide-semiconductor Q9, the conducting of Q10 or end, electric current is by metal-oxide-semiconductor Q9, Q10 output, output current is regulated automatically, one end of inductance L 4 is connected between the drain electrode of the source electrode of metal-oxide-semiconductor Q9 and metal-oxide-semiconductor Q10, the other end connects resistance R 5, resistance R 5 is current sense resistor, capacitor C 10, the anode of the positive pole of C11 and diode D1 is connected with resistance R 5 respectively, capacitor C 10, the minus earth of C11, the output voltage of MPPT circuit 22 are 20.8V.Solar charging electric unit 2 strengthens the feature of environmental protection of the present invention, also enlarges suitable environment of the present invention.
Commercial power charged unit 1 and solar charging electric unit 2 charge to batteries 3 to select a mode by charge and discharge protecting unit 4, solar panels 21 accumulators groups 3 chargings when no civil power is imported.Under the environment of fine day, the solar charging electric energy with the batteries abundance, commercial power chargedly can be finished charging in 3~4 hours in 5 hours.
As shown in Figure 4, batteries 3 adopts series connection and parallel way to connect to form by some single-unit lithium batteries.In the present embodiment, the model of batteries 3 is preferably 18650 or 26700,18650 and adopts the lithium battery group of 12 parallel connections of 5 series connection to design, and 26700 is the lithium battery group design of 6 parallel connections of 5 series connection.Single lithium battery voltage is 2.8~4.2V, and the output voltage of batteries 3 is 14.8~21V.
As Fig. 1 and shown in Figure 5, the input of charge and discharge protecting unit 4 is connected with the output of batteries 3, and the output of charge and discharge protecting unit 4 is connected with the input of power supply output unit 5 and to the management of discharging of the electric energy of batteries 3.Concrete, charge and discharge protecting unit 4 comprises management of charging and discharging chip U1, metal-oxide-semiconductor Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18 and resistance R 6, R7.Wherein, the drain electrode of metal-oxide-semiconductor Q11, Q12, Q13, Q14 is connected with the output of batteries 3 respectively, the source electrode of metal-oxide-semiconductor Q11, Q12, Q13, Q14 is by resistance R 6 back ground connection, the grid of metal-oxide-semiconductor Q11, Q12, Q13, Q14 is connected with the input of management of charging and discharging chip U1 respectively, and metal-oxide-semiconductor Q11, Q12, Q13, Q14 are charging control metal-oxide-semiconductor, and resistance R 6 is current sense resistor, excessive as charging current, perhaps charging voltage is too high, after perhaps battery is full of, then turn-offs battery voluntarily.The drain electrode of metal-oxide-semiconductor Q15, Q16, Q17, Q18 is connected with the input of power supply output unit 5 respectively; the source electrode of metal-oxide-semiconductor Q15, Q16, Q17, Q18 is by resistance R 7 back ground connection; the grid of metal-oxide-semiconductor Q15, Q16, Q17, Q18 is connected with the output of management of charging and discharging chip U1 respectively; metal-oxide-semiconductor Q15, Q16, Q17, Q18 are output control metal-oxide-semiconductor; output voltage is 14.8~21V; resistance R 7 is current sense resistor; excessive as discharging current; perhaps load short circuits; when perhaps voltage is lower than 14.8V, turn-off protection battery voluntarily then.
As Fig. 1 and shown in Figure 6, display unit 6 is connected with the output of charge and discharge protecting unit 4, is used for showing the operating state of batteries 3 and the display unit 6 of charged state.Wherein, display unit 6 comprises MCU61, comparator 62, charactron 63, light-emitting diode D2, D3 and Buck converter 64; MCU61 is connected with comparator 62, charactron 63 and Buck converter 64 respectively; MCU61 drives charactron 63 and shows by the voltage of the output of comparator 62 and Buck converter 64 monitoring charge and discharge protecting unit 4.Charactron 63 shows the voltage section under batteries 3 in working order; the numeral of branch 1,2,3,4,5 shows; the monitoring point of display unit 6 is the output of charge and discharge protecting unit 4; when voltage is lower than 15.8V; carry out the A/D conversion by MCU61, drive charactron 63, show numeral 1; so analogize, showing at 2 o'clock is 16.8V.Light-emitting diode D2, D3 are set to red, green LED, are used for showing charged state.
As shown in Figure 1, power supply output unit 5 comprises the first DC power supply output circuit 51, the second DC power supply output circuit 52, the 3rd DC power supply output circuit 53 and AC power output circuit 54.
As shown in Figure 7, the first DC power supply output circuit 51 uses for external loading for the direct voltage after batteries 3 discharges is become 5~36V direct voltage by synchronization lifting pressure mode.Concrete, the first DC power supply output circuit 51 comprises pwm chip N1, metal-oxide-semiconductor Q1, Q2, Q3, Q4, resistance R 1, R2, inductance L 1 and capacitor C 2, C3, pwm chip N1 respectively with metal-oxide-semiconductor Q1, Q2, Q3, the grid of Q4 connects and output drive signal control metal-oxide-semiconductor Q1, Q2, Q3, the conducting of Q4 or end, electric current is by metal-oxide-semiconductor Q1, Q2, Q3, Q4 output, one end of inductance L 1 is connected between the drain electrode of the source electrode of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, the other end is connected between the drain electrode of the source electrode of metal-oxide-semiconductor Q3 and metal-oxide-semiconductor Q4, metal-oxide-semiconductor Q2, the source electrode of Q3 connects resistance R 2 back ground connection, one end of resistance R 1 connects the drain electrode of metal-oxide-semiconductor Q3, the other end connects capacitor C 2, the positive pole of C3, capacitor C 2, the minus earth of C3.The first DC power supply output circuit 51 can be exported the arbitrary value among DC5~36V, and maximum current is 5A, and maximum power is 180W, and high efficiency reaches more than 94%, and the electrical equipment that is fit to the direct current supply of DC20V/5A uses.
As shown in Figure 8, the second DC power supply output circuit 52 uses for external loading for the direct voltage after batteries 3 discharges is become 10~14V direct voltage by the synchronous buck mode.Concrete, the second DC power supply output circuit 52 comprises pwm chip N2, metal-oxide-semiconductor Q5, Q6, resistance R 3, inductance L 2 and capacitor C 4, C5, pwm chip N2 is connected with the grid of metal-oxide-semiconductor Q5, Q6 respectively and the conducting of output drive signal control metal-oxide-semiconductor Q5, Q6 or end, electric current is by metal-oxide-semiconductor Q5, Q6 output, one end of inductance L 1 is connected between the drain electrode of the source electrode of metal-oxide-semiconductor Q5 and metal-oxide-semiconductor Q6, the other end connects resistance R 3, the positive pole of capacitor C 4, C5 is connected with resistance R 3, the minus earth of capacitor C 4, C5.The second DC power supply output circuit 52 can be exported the arbitrary value among DC10~14V, and maximum current is 5A, and maximum power is 70W, and high efficiency reaches more than 92%, and the electrical equipment that is fit to the direct current supply of DC12V/4A uses.
As shown in Figure 9, the 3rd DC power supply output circuit 53 uses for external loading for the direct voltage after batteries 3 discharges is become 4~6V direct voltage by the synchronous buck mode.Concrete, the 3rd DC power supply output circuit 53 comprises pwm chip N3, metal-oxide-semiconductor Q7, Q8, resistance R 4, inductance L 3 and capacitor C 7, C8, pwm chip N3 is connected with the grid of metal-oxide-semiconductor Q7, Q8 respectively and the conducting of output drive signal control metal-oxide-semiconductor Q7, Q8 or end, electric current is by metal-oxide-semiconductor Q7, Q8 output, one end of inductance L 3 is connected between the drain electrode of the source electrode of metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8, the other end connects resistance R 4, the positive pole of capacitor C 7, C8 is connected with resistance R 4, the minus earth of capacitor C 7, C8.The 3rd DC power supply output circuit 53 can be exported the arbitrary value among DC4~6V, and maximum current is 5A, and maximum power is 30W, and high efficiency reaches more than 90%, and the electrical equipment that is fit to the direct current supply of DC5V/4A uses.
As shown in figure 10, AC power output circuit 54 uses for external loading for the alternating voltage that the direct voltage after batteries 3 discharges is converted to AC220V/50Hz.AC power output circuit 54 comprises the DC/AC transducer that is connected with the output of charge and discharge protecting unit 4; the DC/AC transducer can become the voltage transitions of DC15~21V the power of AC220V/50Hz/2.5A to continue output; maximum peak power is 1300W; duration<5 second; the electrical equipment that is fit to the Alternating Current Power Supply of AC220V/3A uses; simultaneously; AC220V/50Hz meets the voltage standard of China; can satisfy power is that 500W uses with interior electrical equipment; can drive 400W with interior inductive load, as: motor.
In sum, batteries 3 can store certain electric energy by commercial power charged unit 1 and solar charging electric unit 2, and by polytype power output circuit output, can charge for electrical equipment such as mobile phone, flashlight, notebook computers in real time, the present invention is easy to carry, can carry out outdoor work.
Above-described embodiment is preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims (9)

1. the multivoltage of the control certainly output system of a stand-by power supply; it is characterized in that: comprise commercial power charged unit (1); solar charging electric unit (2); batteries (3); charge and discharge protecting unit (4) and power supply output unit (5); described commercial power charged unit (1) and described solar charging electric unit (2) charge to described batteries (3) to select a mode by described charge and discharge protecting unit (4); the output of described charge and discharge protecting unit (4) is connected with the input of described power supply output unit (5) and to the management of discharging of the electric energy of described batteries (3), described power supply output unit (5) comprising:
The first DC power supply output circuit (51) is used for that the direct voltage after described batteries (3) discharge is become 5~36V direct voltage by synchronization lifting pressure mode and uses for external loading;
The second DC power supply output circuit (52) is used for that the direct voltage after described batteries (3) discharge is become 10~14V direct voltage by the synchronous buck mode and uses for external loading;
The 3rd DC power supply output circuit (53) is used for that the direct voltage after described batteries (3) discharge is become 4~6V direct voltage by the synchronous buck mode and uses for external loading; And
AC power output circuit (54) uses for external loading for the alternating voltage that the direct voltage after described batteries (3) discharge is converted to AC220V/50Hz.
2. the multivoltage of the control certainly output system of stand-by power supply according to claim 1, it is characterized in that: the described first DC power supply output circuit (51) comprises pwm chip N1, metal-oxide-semiconductor Q1, Q2, Q3, Q4, resistance R 1, R2, inductance L 1 and capacitor C 2, C3, described pwm chip N1 respectively with metal-oxide-semiconductor Q1, Q2, Q3, the grid of Q4 connects and output drive signal control metal-oxide-semiconductor Q1, Q2, Q3, the conducting of Q4 or end, electric current is by metal-oxide-semiconductor Q1, Q2, Q3, Q4 output, one end of described inductance L 1 is connected between the drain electrode of the source electrode of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, the other end is connected between the drain electrode of the source electrode of metal-oxide-semiconductor Q3 and metal-oxide-semiconductor Q4, described metal-oxide-semiconductor Q2, the source electrode of Q3 connects resistance R 2 back ground connection, one end of described resistance R 1 connects the drain electrode of metal-oxide-semiconductor Q3, the other end connects capacitor C 2, the positive pole of C3, described capacitor C 2, the minus earth of C3.
3. the multivoltage of the control certainly output system of stand-by power supply according to claim 1, it is characterized in that: the described second DC power supply output circuit (52) comprises pwm chip N2, metal-oxide-semiconductor Q5, Q6, resistance R 3, inductance L 2 and capacitor C 4, C5, described pwm chip N2 respectively with metal-oxide-semiconductor Q5, the grid of Q6 connects and output drive signal control metal-oxide-semiconductor Q5, the conducting of Q6 or end, electric current is by metal-oxide-semiconductor Q5, Q6 output, one end of described inductance L 1 is connected between the drain electrode of the source electrode of metal-oxide-semiconductor Q5 and metal-oxide-semiconductor Q6, the other end connects resistance R 3, described capacitor C 4, the positive pole of C5 is connected with resistance R 3, capacitor C 4, the minus earth of C5.
4. the multivoltage of the control certainly output system of stand-by power supply according to claim 1, it is characterized in that: described the 3rd DC power supply output circuit (53) comprises pwm chip N3, metal-oxide-semiconductor Q7, Q8, resistance R 4, inductance L 3 and capacitor C 7, C8, described pwm chip N3 respectively with metal-oxide-semiconductor Q7, the grid of Q8 connects and output drive signal control metal-oxide-semiconductor Q7, the conducting of Q8 or end, electric current is by metal-oxide-semiconductor Q7, Q8 output, one end of described inductance L 3 is connected between the drain electrode of the source electrode of metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8, the other end connects resistance R 4, described capacitor C 7, the positive pole of C8 is connected with resistance R 4, capacitor C 7, the minus earth of C8.
5. the multivoltage of the control certainly output system of stand-by power supply according to claim 1, it is characterized in that: described AC power output circuit (54) comprises the DC/AC transducer that is connected with the output of described charge and discharge protecting unit (4).
6. the multivoltage of the control certainly output system of stand-by power supply according to claim 1 is characterized in that: described batteries (3) adopts series connection and parallel way to connect to form by some single-unit lithium batteries.
7. the multivoltage of the control certainly output system of stand-by power supply according to claim 1, it is characterized in that: described solar charging electric unit (2) is made up of solar panels (21) and MPPT circuit (22), the generating voltage of the described solar panels of described MPPT circuit (22) detecting real-time (21), and tracking ceiling voltage current value, with the highest efficient described batteries (3) is charged, described MPPT circuit (22) comprises pwm chip N4, metal-oxide-semiconductor Q9, Q10, resistance R 5, inductance L 4, capacitor C 10, C11 and diode D1, described pwm chip N4 respectively with metal-oxide-semiconductor Q9, the grid of Q10 connects and output drive signal control metal-oxide-semiconductor Q9, the conducting of Q10 or end, electric current is by metal-oxide-semiconductor Q9, Q10 output, one end of described inductance L 4 is connected between the drain electrode of the source electrode of metal-oxide-semiconductor Q9 and metal-oxide-semiconductor Q10, the other end connects resistance R 5, described capacitor C 10, the anode of the positive pole of C11 and diode D1 is connected with resistance R 5 respectively, capacitor C 10, the minus earth of C11.
8. the multivoltage of the control certainly output system of stand-by power supply according to claim 1; it is characterized in that: described charge and discharge protecting unit (4) comprises management of charging and discharging chip U1; metal-oxide-semiconductor Q11; Q12; Q13; Q14; Q15; Q16; Q17; Q18 and resistance R 6; R7; described metal-oxide-semiconductor Q11; Q12; Q13; the drain electrode of Q14 is connected with the output of described batteries (3) respectively; metal-oxide-semiconductor Q11; Q12; Q13; the source electrode of Q14 is by resistance R 6 back ground connection; metal-oxide-semiconductor Q11; Q12; Q13; the grid of Q14 is connected with the input of management of charging and discharging chip U1 respectively; described metal-oxide-semiconductor Q15; Q16; Q17; the drain electrode of Q18 is connected with the input of described power supply output unit (5) respectively; metal-oxide-semiconductor Q15; Q16; Q17; the source electrode of Q18 is by resistance R 7 back ground connection, metal-oxide-semiconductor Q15; Q16; Q17; the grid of Q18 is connected with the output of management of charging and discharging chip U1 respectively.
9. the multivoltage of the control certainly output system of stand-by power supply according to claim 1; it is characterized in that: also comprise the operating state that be used for to show described batteries (3) that is connected with the output of described charge and discharge protecting unit (4) and the display unit (6) of charged state; described display unit (6) comprises MCU(61); comparator (62); charactron (63); light-emitting diode D2; D3 and Buck converter (64); described MCU(61) respectively with comparator (62); charactron (63) is connected with Buck converter (64); described MCU(61) passes through the voltage that comparator (62) and Buck converter (64) are monitored the output of described charge and discharge protecting unit (4), drive charactron (63) and show.
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CN107681765A (en) * 2017-11-10 2018-02-09 常州欧迈斯新能源科技有限公司 Solar DC energy storage power device and its control method
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