CN219164273U - Charging and discharging control system of energy storage power supply - Google Patents
Charging and discharging control system of energy storage power supply Download PDFInfo
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- CN219164273U CN219164273U CN202223561293.XU CN202223561293U CN219164273U CN 219164273 U CN219164273 U CN 219164273U CN 202223561293 U CN202223561293 U CN 202223561293U CN 219164273 U CN219164273 U CN 219164273U
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Abstract
The utility model provides an energy storage power supply charge-discharge control system which comprises a controllable bidirectional DC-DC conversion circuit, an inversion output circuit, a controllable direct current booster circuit, a control unit and a rectification circuit, wherein the controllable bidirectional DC-DC conversion circuit is connected with the inversion output circuit; the first connecting end of the controllable bidirectional DC-DC conversion circuit is connected with an energy storage power supply, the second connecting end of the controllable bidirectional DC-DC conversion circuit is connected with the input end of the inversion output circuit, and the output end of the inversion output circuit supplies power to a load; the input end of the rectification circuit is connected with an AC power supply, the output end of the rectification circuit is connected with the input end of the controllable direct current booster circuit, the output end of the controllable rectification circuit is connected with the second connecting end of the controllable bidirectional DC-DC conversion circuit, and the control unit is used for outputting control signals to the inversion output circuit, the controllable bidirectional DC-DC conversion circuit and the control end of the controllable direct current booster circuit; through the structure, the charging and discharging power can be regulated in the charging and discharging process of the energy storage power supply, so that the charging and discharging efficiency of the energy storage power supply can be effectively improved, and the adaptability of the whole system can be improved.
Description
Technical Field
The present disclosure relates to power control systems, and particularly to a power control system for charging and discharging an energy storage power supply.
Background
In the energy storage power supply (including lithium battery, lead-acid battery, super capacitor, etc.), the control of charging and discharging to the energy storage power supply is needed, and in the prior art, the control of charging and discharging to the energy storage power supply is generally independent, namely adopts the adapter that charges during charging, adopts other inverter circuit to realize during discharging, and this kind of mode makes the energy storage power supply use very inconveniently.
In addition, the existing charging adapter of the energy storage power supply generally converts alternating current into direct current and outputs the direct current to the energy storage power supply, and the power of the charging adapter is generally smaller and fixed, so that the charging efficiency of the energy storage power supply is low, the adaptability is poor, and the anti-interference capability is weak.
Therefore, in order to solve the above-mentioned technical problems, a new technical means is needed.
Disclosure of Invention
Therefore, the utility model aims to provide the charge and discharge control system of the energy storage power supply, which can regulate the charge and discharge power in the charge and discharge process of the energy storage power supply, so that the charge and discharge efficiency of the energy storage power supply can be effectively improved, the adaptability of the whole system can be improved, the energy storage power supply has stronger anti-interference capability and high stability.
The utility model provides an energy storage power supply charge-discharge control system which comprises a controllable bidirectional DC-DC conversion circuit, an inversion output circuit, a controllable direct current booster circuit, a control unit and a rectification circuit, wherein the controllable bidirectional DC-DC conversion circuit is connected with the inversion output circuit;
the first connecting end of the controllable bidirectional DC-DC conversion circuit is connected with an energy storage power supply, the second connecting end of the controllable bidirectional DC-DC conversion circuit is connected with the input end of the inversion output circuit, and the output end of the inversion output circuit supplies power to a load; the input end of the rectification circuit is connected with an AC power supply, the output end of the rectification circuit is connected with the input end of the controllable direct current booster circuit, the output end of the controllable rectification circuit is connected with the second connecting end of the controllable bidirectional DC-DC conversion circuit, and the control unit is used for outputting control signals to the inversion output circuit, the controllable bidirectional DC-DC conversion circuit and the control end of the controllable direct current booster circuit; through the structure, the charging and discharging power can be regulated in the charging and discharging process of the energy storage power supply, so that the charging and discharging efficiency of the energy storage power supply can be effectively improved, and the adaptability of the whole system can be improved.
Further, the controllable bidirectional DC-DC conversion circuit comprises a first inversion rectification circuit, a second inversion rectification circuit, a voltage detection circuit and a transformer T1,
the input end of the first inversion rectifying circuit is connected with an energy storage power supply, the output end of the first inversion rectifying circuit is connected with a primary winding of a transformer T1, a secondary winding of the transformer T1 is connected with the input end of the second inversion rectifying circuit, and the output end of the second inversion rectifying circuit is connected with the input end of the inversion circuit;
when the energy storage power supply is charged, the input end of the first inversion rectifying circuit is converted into an output end, and the output end of the second inversion rectifying circuit is converted into an input end;
the voltage detection circuit is used for detecting element terminal voltages in the first inversion rectification circuit and the second inversion rectification circuit and outputting voltage detection signals to the control unit; the control end of first contravariant rectifier circuit and second contravariant rectifier circuit is connected in the control output of control unit, can realize the controllable adjustment to the charge power when charging through above-mentioned structure, can provide reliable alternating current moreover when discharging, from the different demands of satisfying, and charging and discharging process separate but circuit itself is unchangeable moreover to use cost is lower.
Further, the controllable bidirectional DC-DC conversion circuit further comprises an inductor L1 and a capacitor C2, wherein two ends of the inductor L1 are connected between the homonymous end of the secondary winding of the transformer T1 and the positive input end of the second inversion rectifying circuit, and two ends of the capacitor C2 are connected between the heteronymous end of the secondary winding of the transformer T1 and the negative input end of the second inversion rectifying circuit.
Further, the controllable bidirectional DC-DC conversion circuit further comprises a capacitor C1, and two ends of the capacitor C1 are respectively connected between the positive input end and the negative input end of the first inversion rectifying circuit, so that the anti-interference capability of the whole system can be enhanced.
Further, the controllable direct current boost circuit comprises an inductor L2, a diode D1 and an NMOS tube Q13;
one end of the inductor L2 is used as an input end of the controllable direct current boost circuit and is connected with a positive output end of the rectifying circuit, the other end of the inductor L2 is connected with an anode of the diode D1, a cathode of the diode D1 is used as an output end of the controllable direct current boost circuit and is connected with a positive output end of the second inverting rectifying circuit, a drain electrode of the NMOS tube Q13 is connected with an anode of the diode D1, a cathode of the NMOS tube Q13 is connected with a negative output end of the rectifying circuit, and a cathode of the NMOS tube Q13 is also connected with a negative output end of the second inverting rectifying circuit, a grid electrode of the NMOS tube Q13 is connected with a control output end of the control unit, through the structure, PWM signals with different duty ratios are output by the control unit to control the NMOS tube Q13 to work, so that output voltage is adjusted, the diode D1 has two functions, one is used for rectifying when an energy storage power supply is charged, and current is prevented from impacting the NMOS tube Q13 when the energy storage power supply discharges.
Further, the inversion output circuit comprises an inverter and a filter circuit;
the input end of the inverter is connected with the output end of the second inversion rectifying circuit, the output end of the inverter is connected with the input end of the filter circuit, the output end of the filter circuit supplies power to the load, and the control end of the inverter is connected with the control output end of the control unit.
Further, the inversion output circuit further comprises a capacitor C3, and the capacitor C3 is connected between the positive input end and the negative input end of the inverter, so that the anti-interference capability of the whole system can be enhanced.
Further, the inversion output circuit further comprises an electric control change-over switch, the input end of the electric control change-over switch is connected to the output end of the filter circuit, the first output end of the electric control change-over switch supplies power to the AC load, the second output end of the electric control switch supplies power to the generator for parallel operation output, and the control end of the electric control change-over switch is connected to the control unit, so that the adaptability of the whole system can be enhanced.
Further, the control unit is a singlechip.
The utility model has the beneficial effects that: according to the utility model, the charging and discharging power can be regulated in the charging and discharging process of the energy storage power supply, so that the charging and discharging efficiency of the energy storage power supply can be effectively improved, the adaptability of the whole system can be improved, the energy storage power supply has stronger anti-interference capability and high stability.
Drawings
The utility model is further described below with reference to the accompanying drawings and examples:
fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic circuit diagram of the present utility model.
Detailed Description
The present utility model is further described in detail below:
the utility model provides an energy storage power supply charge-discharge control system which comprises a controllable bidirectional DC-DC conversion circuit, an inversion output circuit, a controllable direct current booster circuit, a control unit and a rectification circuit, wherein the controllable bidirectional DC-DC conversion circuit is connected with the inversion output circuit;
the first connecting end of the controllable bidirectional DC-DC conversion circuit is connected with an energy storage power supply, the second connecting end of the controllable bidirectional DC-DC conversion circuit is connected with the input end of the inversion output circuit, and the output end of the inversion output circuit supplies power to a load; the input end of the rectification circuit is connected with an AC power supply (the power supply is provided for a power grid), the output end of the rectification circuit is connected with the input end of the controllable direct current booster circuit, the output end of the controllable rectification circuit is connected with the second connection end of the controllable bidirectional DC-DC conversion circuit, and the control unit is used for outputting control signals to the inversion output circuit, the controllable bidirectional DC-DC conversion circuit and the control end of the controllable direct current booster circuit; through the structure, the charging and discharging power can be adjusted in the charging and discharging process of the energy storage power supply, so that the charging and discharging efficiency of the energy storage power supply can be effectively improved, and the adaptability of the whole system can be improved. The control unit adopts the existing singlechip, and can be purchased in the market directly, and details are not repeated here.
In this embodiment, the controllable bidirectional DC-DC conversion circuit includes a first inverting rectification circuit, a second inverting rectification circuit, a voltage detection circuit and a transformer T1,
the input end of the first inversion rectifying circuit is connected with an energy storage power supply, the output end of the first inversion rectifying circuit is connected with a primary winding of a transformer T1, a secondary winding of the transformer T1 is connected with the input end of the second inversion rectifying circuit, and the output end of the second inversion rectifying circuit is connected with the input end of the inversion circuit;
when the energy storage power supply is charged, the input end of the first inversion rectifying circuit is converted into an output end, and the output end of the second inversion rectifying circuit is converted into an input end;
the voltage detection circuit is used for detecting element terminal voltages in the first inversion rectification circuit and the second inversion rectification circuit and outputting voltage detection signals to the control unit; the control end of first contravariant rectifier circuit and second contravariant rectifier circuit is connected in the control output of control unit, can realize the controllable adjustment to the charge power when charging through above-mentioned structure, can provide reliable alternating current moreover when discharging, from the different demands of satisfying, and charging and discharging process separate but circuit itself is unchangeable moreover to use cost is lower.
As shown in fig. 2: the structure of the first inversion rectifying circuit and the structure of the second inversion rectifying circuit are identical, an inversion bridge structure formed by NMOS (N-channel metal oxide semiconductor) tubes are adopted, the specific connection relation is shown in figure 2, when an energy storage power supply VB discharges, Q1-Q4 realizes the function of an inverter, direct current is converted into alternating current, the alternating current is boosted through a transformer T1, an inductance L1 and a capacitance C2 form an LC resonant circuit, at the moment, Q5-Q8 realizes rectification, the alternating current is converted into direct current, then the direct current is converted into alternating current by a subsequent inversion output circuit and is output to a load, when the load is charged, the direct current output by the rectifying circuit and a controllable direct current boosting circuit is input to the second inversion rectifying circuit, at the moment, the output end of the second inversion rectifying circuit is converted into an input end when the energy storage power supply VB discharges, at the moment, the second inversion rectifying circuit realizes the function of an inverter, the direct current is converted into alternating current, the transformer is reduced, the first inversion rectifying circuit is rectified, and the capacitance C1 is filtered, so that the energy storage power supply is charged; the control of the charging or discharging power is realized by providing different duty ratio PWM signals to NMOS tubes of a first inversion rectifying circuit or a second inversion rectifying circuit which realize the inverter function.
Regarding the rectification principle in the above, the second rectification inverter circuit is exemplified as:
the voltage detection circuit adopts the existing voltage detection chip (which is not described herein), when the forward voltage (from input to output) is detected on the corresponding NMOS tube, the control unit controls the NMOS tube and the corresponding NMOS tube to be directly conducted, for example, Q1 and Q4 are conducted simultaneously, and other NMOS tubes of the circuit are turned off, so as to form the principle of a bridge rectifier circuit composed of diodes.
In the above, the NMOS transistor may be implemented by using an IGBT instead.
In this embodiment, the controllable bidirectional DC-DC conversion circuit further includes an inductor L1 and a capacitor C2, where two ends of the inductor L1 are connected between the homonymous end of the secondary winding of the transformer T1 and the positive input end of the second inverter rectifier circuit, and two ends of the capacitor C2 are connected between the heteronymous end of the secondary winding of the transformer T1 and the negative input end of the second inverter rectifier circuit, so that current can be filtered, thereby maintaining stability of working current and having stronger anti-interference capability.
In this embodiment, the controllable bidirectional DC-DC conversion circuit further includes a capacitor C1, and two ends of the capacitor C1 are respectively connected between the positive input end and the negative input end of the first inverter rectifier circuit, so that the anti-interference capability of the whole system can be enhanced.
In this embodiment, the controllable dc boost circuit includes an inductor L2, a diode D1, and an NMOS Q13;
one end of the inductor L2 is used as an input end of the controllable direct current boost circuit and is connected with a positive output end of the rectifying circuit, the other end of the inductor L2 is connected with an anode of the diode D1, a cathode of the diode D1 is used as an output end of the controllable direct current boost circuit and is connected with a positive output end of the second inverting rectifying circuit, a drain electrode of the NMOS tube Q13 is connected with an anode of the diode D1, a cathode of the NMOS tube Q13 is connected with a negative output end of the rectifying circuit, and a cathode of the NMOS tube Q13 is also connected with a negative output end of the second inverting rectifying circuit, a grid electrode of the NMOS tube Q13 is connected with a control output end of the control unit, through the structure, PWM signals with different duty ratios are output by the control unit to control the NMOS tube Q13 to work, so that output voltage is adjusted, the diode D1 has two functions, one is used for rectifying when an energy storage power supply is charged, and current is prevented from impacting the NMOS tube Q13 when the energy storage power supply discharges.
In this embodiment, the inversion output circuit includes an inverter and a filter circuit;
the input of dc-to-ac converter is connected in the output of second contravariant rectifier circuit, and the output of dc-to-ac converter is connected in filter circuit's input, and filter circuit's output supplies power to the load, the control end of dc-to-ac converter is connected in the control output of control unit, through above-mentioned structure, can provide stable alternating current to the load, has stronger interference killing feature, and wherein, filter circuit is as shown in fig. 2: for inductance L3, inductance L4 and electric capacity C4, inductance L3 and inductance L4's one end is connected respectively in the positive output and the negative output of dc-to-ac converter, and inductance L3's the other end passes through electric capacity C4 to be connected in inductance L4's the other end, and electric capacity C4's both ends are as the output of inversion output circuit respectively.
In this embodiment, the inverting output circuit further includes a capacitor C3, where the capacitor C3 is connected between the positive input end and the negative input end of the inverter, and is used for storing energy, so as to enhance the anti-interference capability of the whole system.
In this embodiment, the inversion output circuit further includes an electric control change-over switch, the input end of the electric control change-over switch is connected to the output end of the filter circuit, the first output end of the electric control change-over switch supplies power to the AC load, the second output end of the electric control switch supplies power to the generator for parallel operation output, the control end of the electric control change-over switch is connected to the control unit, and the adaptability of the whole system can be enhanced, wherein the electric control change-over switch adopts the existing relay or contactor, and is two, and is respectively used for controlling the AC load and the parallel operation load, and has two working modes: 1. only the load mode when only AC loads; 2. in the parallel operation mode, the AC load is started, the load capacity is increased, the parallel operation load is the existing generator, and when the parallel operation is performed, the output power of the generator is improved, so that the generator has stronger load capacity.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.
Claims (9)
1. The utility model provides an energy storage power supply charge-discharge control system which characterized in that: the device comprises a controllable bidirectional DC-DC conversion circuit, an inversion output circuit, a controllable DC boost circuit, a control unit and a rectification circuit;
the first connecting end of the controllable bidirectional DC-DC conversion circuit is connected with an energy storage power supply, the second connecting end of the controllable bidirectional DC-DC conversion circuit is connected with the input end of the inversion output circuit, and the output end of the inversion output circuit supplies power to a load; the input end of the rectification circuit is connected with an AC power supply, the output end of the rectification circuit is connected with the input end of the controllable direct current booster circuit, the output end of the controllable rectification circuit is connected with the second connecting end of the controllable bidirectional DC-DC conversion circuit, and the control unit is used for outputting control signals to the inversion output circuit, the controllable bidirectional DC-DC conversion circuit and the control end of the controllable direct current booster circuit.
2. The energy storage power supply charge-discharge control system according to claim 1, wherein: the controllable bidirectional DC-DC conversion circuit comprises a first inversion rectification circuit, a second inversion rectification circuit, a voltage detection circuit and a transformer T1,
the input end of the first inversion rectifying circuit is connected with an energy storage power supply, the output end of the first inversion rectifying circuit is connected with a primary winding of a transformer T1, a secondary winding of the transformer T1 is connected with the input end of the second inversion rectifying circuit, and the output end of the second inversion rectifying circuit is connected with the input end of the inversion circuit;
when the energy storage power supply is charged, the input end of the first inversion rectifying circuit is converted into an output end, and the output end of the second inversion rectifying circuit is converted into an input end;
the voltage detection circuit is used for detecting element terminal voltages in the first inversion rectification circuit and the second inversion rectification circuit and outputting voltage detection signals to the control unit; the control ends of the first inversion rectifying circuit and the second inversion rectifying circuit are connected to the control output end of the control unit.
3. The energy storage power supply charge-discharge control system according to claim 2, wherein: the controllable bidirectional DC-DC conversion circuit further comprises an inductor L1 and a capacitor C2, wherein two ends of the inductor L1 are connected between the homonymous end of the secondary winding of the transformer T1 and the positive input end of the second inversion rectifying circuit, and two ends of the capacitor C2 are connected between the heteronymous end of the secondary winding of the transformer T1 and the negative input end of the second inversion rectifying circuit.
4. The energy storage power supply charge-discharge control system according to claim 2, wherein: the controllable bidirectional DC-DC conversion circuit further comprises a capacitor C1, and two ends of the capacitor C1 are respectively connected between the positive input end and the negative input end of the first inversion rectifying circuit.
5. The energy storage power supply charge-discharge control system according to claim 2, wherein: the controllable direct-current boost circuit comprises an inductor L2, a diode D1 and an NMOS tube Q13;
one end of the inductor L2 is used as an input end of the controllable direct current booster circuit and is connected with a positive output end of the rectifying circuit, the other end of the inductor L2 is connected with an anode of the diode D1, a cathode of the diode D1 is used as an output end of the controllable direct current booster circuit and is connected with a positive output end of the second inversion rectifying circuit, a drain electrode of the NMOS tube Q13 is connected with an anode of the diode D1, a cathode of the NMOS tube Q13 is connected with a negative output end of the rectifying circuit, and a cathode of the NMOS tube Q13 is also connected with a negative output end of the second inversion rectifying circuit, and a grid electrode of the NMOS tube Q13 is connected with a control output end of the control unit.
6. The energy storage power supply charge-discharge control system according to claim 1, wherein: the inversion output circuit comprises an inverter and a filter circuit;
the input end of the inverter is connected with the output end of the second inversion rectifying circuit, the output end of the inverter is connected with the input end of the filter circuit, the output end of the filter circuit supplies power to the load, and the control end of the inverter is connected with the control output end of the control unit.
7. The energy storage power supply charge and discharge control system according to claim 6, wherein: the inversion output circuit further comprises a capacitor C3, and the capacitor C3 is connected between the positive input end and the negative input end of the inverter.
8. The energy storage power supply charge and discharge control system according to claim 6, wherein: the inversion output circuit further comprises an electric control change-over switch, the input end of the electric control change-over switch is connected to the output end of the filter circuit, the first output end of the electric control change-over switch supplies power to the AC load, the second output end of the electric control switch supplies power to the generator for parallel operation output, and the control end of the electric control change-over switch is connected to the control unit.
9. The energy storage power supply charge-discharge control system according to claim 1, wherein: the control unit is a singlechip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223561293.XU CN219164273U (en) | 2022-12-30 | 2022-12-30 | Charging and discharging control system of energy storage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223561293.XU CN219164273U (en) | 2022-12-30 | 2022-12-30 | Charging and discharging control system of energy storage power supply |
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| CN219164273U true CN219164273U (en) | 2023-06-09 |
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| CN202223561293.XU Active CN219164273U (en) | 2022-12-30 | 2022-12-30 | Charging and discharging control system of energy storage power supply |
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