CN210490543U - Multi-stage energy storage element parallel charging and discharging system - Google Patents
Multi-stage energy storage element parallel charging and discharging system Download PDFInfo
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- CN210490543U CN210490543U CN201921716238.9U CN201921716238U CN210490543U CN 210490543 U CN210490543 U CN 210490543U CN 201921716238 U CN201921716238 U CN 201921716238U CN 210490543 U CN210490543 U CN 210490543U
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Abstract
The utility model relates to a multi-stage energy storage element parallel charging and discharging system, which comprises a controller and a plurality of parallel branches, wherein the parallel branches are connected in parallel, and each parallel branch comprises an energy storage element and a switch circuit which are connected in series; the controller is connected with the switch circuit in each parallel branch, the controller is used for detecting mains voltage, when the mains voltage is normal, the switch circuit is controlled to be closed, so that the mains voltage can charge the energy storage element, and when the mains voltage is abnormal, the switch circuit is controlled to be opened, so that the energy storage element supplies power for external equipment.
Description
Technical Field
The utility model relates to an uninterrupted power supply technical field especially relates to a parallelly connected charge-discharge system of multistage energy storage component.
Background
With the development of science and technology and the progress of society, people have higher and higher requirements on electronic products. Under the condition that electronic equipment commonly used in life does not have an internal battery, once the electronic equipment is in sudden power failure, the electronic equipment cannot normally work, and therefore inevitable trouble is brought to a user.
In order to solve the uninterrupted power supply technology, an output multi-stage battery parallel charging and discharging system is adopted, and when the mains supply works normally, the circuit can work for external batteries under the condition that the circuit works for own electronic equipment until all batteries are fully charged. Once the mains supply is abnormal, the external battery continues to work for the electronic equipment so as to ensure that the electronic equipment normally works under the condition of power failure, thereby avoiding bringing unnecessary trouble to users.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a multistage energy storage component charge-discharge system that connects in parallel is provided, guarantees that electronic equipment can normally work under the condition that falls the electricity to it is troublesome to avoid bringing unnecessary for the user.
The utility model provides a technical scheme that its technical problem adopted is: the multi-stage energy storage element parallel charging and discharging system comprises a controller and a plurality of parallel branches, wherein the parallel branches are connected in parallel, and each parallel branch comprises an energy storage element and a switch circuit which are connected in series; the controller is connected with the switch circuit in each parallel branch, the controller is used for detecting mains voltage, when the mains voltage is normal, the switch circuit is controlled to be closed, so that the mains voltage can charge the energy storage element, and when the mains voltage is abnormal, the switch circuit is controlled to be opened, so that the energy storage element supplies power for external equipment.
The controller is also connected with the energy storage element in each parallel branch and is used for detecting the capacity of the energy storage element and controlling the on and off of a switching circuit connected with the energy storage element in series according to the capacity.
The switch circuit comprises a first power switch tube, a second power switch tube, a fly-wheel diode, an energy storage filter inductor and a filter energy storage capacitor; the source electrode of the first power switch tube is connected with the source electrode of the second power switch tube, and the drain electrode of the first power switch tube is respectively connected with one end of the energy storage filter inductor and the negative electrode of the fly-wheel diode; the other end of the energy storage filter inductor is connected with the anode of the energy storage element, the anode of the freewheeling diode is connected with the cathode of the energy storage element, the anode of the filter energy storage capacitor is connected with the anode of the energy storage element, and the cathode of the filter energy storage capacitor is connected with the cathode of the energy storage element; the drain electrode of the second power switch tube is connected with the positive electrode of the bus voltage; and the grid electrode of the first power switch tube and the grid electrode of the second power switch tube are respectively connected with two output control ends of the controller.
Still be connected with current sampling resistance between switch circuit's the energy storage element negative pole and the bus voltage negative pole, current sampling resistance's both ends link to each other through a resistance and current sampling fortune's normal phase input and reverse phase input respectively, current sampling fortune's output links to each other with the input of controller, still be connected with feedback resistance between current sampling fortune's the output and the reverse phase input that current sampling fortune was put.
The switch circuit is connected with the mains supply through an AC-DC converter.
Advantageous effects
Since the technical scheme is used, compared with the prior art, the utility model, have following advantage and positive effect: the utility model discloses a switch circuit in the controller is controlled the parallelly connected charge-discharge system of multistage energy storage component, and when the commercial power normally worked, controller control switch circuit closed for the commercial power can charge for energy storage component, and when the commercial power was unusual, switch circuit was opened to the controller, makes energy storage component can supply power for external equipment, guarantees that electronic equipment can normally work under the circumstances of falling the electricity, thereby avoids bringing unnecessary for the user troublesome.
Drawings
FIG. 1 is a schematic block diagram of the present invention;
fig. 2 is a circuit diagram of the switching circuit of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
The embodiment of the utility model relates to a multistage energy storage component parallel charging and discharging system, as shown in figure 1, comprising a controller and a plurality of parallel branches, wherein the parallel branches are connected in parallel, and each parallel branch comprises an energy storage component and a switch circuit which are connected in series; the controller is connected with the energy storage element and the switching circuit in each parallel branch, and the switching circuit is connected with the mains supply through the AC-DC converter. The controller is used for detecting mains voltage, and when mains voltage is normal, the control switch circuit closes for mains voltage can charge for energy storage element, and when mains voltage is out of order, the control switch circuit opens, makes energy storage element supply power for external equipment.
The controller in the embodiment can adopt an STM 3232-bit ARM Cortex MCU, integrates high performance, real-time performance, digital signal processing, low power consumption and low voltage, and simultaneously keeps the characteristic of high integration level. The energy storage element in this embodiment is a battery.
In the embodiment, the controller MCU detects the input alternating voltage of the commercial power and the capacity of the battery in each parallel branch to complete the work of the whole system. The working process is as follows: when the commercial power is not connected, the chip working power supply of the MCU of the system controller is provided by the battery, and then the MCU detects the battery capacity of each parallel branch circuit and judges whether the battery capacity is in a normal range, so that whether the battery can work normally is judged. If the battery in the first parallel branch can work normally, the controller MCU controls the switch circuit in the first parallel branch to be opened, so that the battery in the first parallel branch can provide electric energy for external equipment, if the battery in the first parallel branch can not work, whether the switch circuit in the second parallel branch can be opened or not is judged according to the battery capacity in the second parallel branch, if the switch circuit in the second parallel branch can be opened or not is judged according to the battery capacity in the third parallel branch, and the switch circuit in the third parallel branch can not be opened or not is judged according to the battery capacity in the third parallel branch, so that the battery in the first parallel branch can work normally, and the switch circuit in the third parallel branch can be opened or not, so that. When the system of the embodiment is in alternating current access, the MCU detects that there is an input alternating current voltage of the mains supply, and then closes all the switching branches, so that the power supplied by the external device is supplied by the mains supply through the AC-DC converter, and the mains supply through the AC-DC converter simultaneously charges the battery in each parallel branch in a voltage-reducing constant-current manner until the battery is fully charged, and then the charging is performed. When power is off, the MCU detects that no commercial power alternating-current voltage exists, and at the moment, the whole system enables the battery in the system to provide electric energy for external equipment according to the mode, so that the function of uninterrupted power supply is realized.
The system of the embodiment is composed of a plurality of charging and discharging parallel branches, each parallel branch is provided with a switch circuit, as shown in fig. 2, the switch circuit includes a first power switch tube Q1, a second power switch tube Q2, a freewheeling diode D1, an energy storage filter inductor L1 and a filter energy storage capacitor EC 1; the source electrode of the first power switch tube Q1 is connected with the source electrode of the second power switch tube Q2, and the drain electrode of the first power switch tube Q1 is respectively connected with one end of the energy storage filter inductor L1 and the negative electrode of the fly-wheel diode D1; the other end of the energy storage filter inductor L1 is connected with the anode of the energy storage element, the anode of the freewheeling diode D1 is connected with the cathode of the energy storage element, the anode of the filter energy storage capacitor EC1 is connected with the anode of the energy storage element, and the cathode of the filter energy storage capacitor EC1 is connected with the cathode of the energy storage element; the drain electrode of the second power switch tube Q2 is connected with the positive electrode of the bus voltage; the grid electrode of the first power switch tube Q1 and the grid electrode of the second power switch tube Q2 are respectively connected with two output control ends of the controller. When the battery needs to be charged, the control end PWM2 of the controller sends out a low level to turn on the second power switch Q2, and at the same time, the control end PWM1 of the controller drives the first power switch Q1 with a PWM signal with a frequency of 65Khz, at this time, the first power switch Q1, the freewheeling diode D1, the filtering energy storage capacitor EC1 and the first power switch L1 form a BUCK circuit, and the battery starts to be charged. When the battery needs to be discharged, the control terminals PWM1 and PWM2 of the controller both generate constant low level signals to turn on the first power switch Q1 and the second power switch Q2, and at this time, the battery can start to transmit power to the bus. Therefore, the first power switch tube and the second power switch tube in the embodiment are both controlled by the controller, so that the normal operation of the whole system is ensured.
Still be connected with current sampling resistance R5 between switch circuit's the energy storage element negative pole and the bus voltage negative pole, current sampling resistance R5's both ends link to each other through a resistance and current sampling operational amplifier U1's normal phase input and reverse phase input respectively, current sampling operational amplifier U1's output links to each other with the input of controller, still be connected with feedback resistance R8 between current sampling operational amplifier U1's the output and the reverse phase input of current sampling operational amplifier U1. The current during charging and discharging can be transmitted to the controller through the current sampling resistor R5 and the current sampling operational amplifier U1, so that the controller can monitor the charging current and the discharging current.
It is not difficult to discover, the utility model discloses a switch circuit among the controller is controlled the parallelly connected charge-discharge system of multistage energy storage component, and when the commercial power normally worked, controller control switch circuit closed for the commercial power can charge for energy storage component, and when the commercial power was unusual, switch circuit was opened to the controller, makes energy storage component can supply power for external equipment, guarantees that electronic equipment can normally work under the condition of falling the electricity, thereby avoids bringing unnecessary for the user troublesome.
Claims (5)
1. A multi-stage energy storage element parallel charging and discharging system comprises a controller and a plurality of parallel branches, and is characterized in that the plurality of parallel branches are connected in parallel, and each parallel branch comprises an energy storage element and a switch circuit which are connected in series; the controller is connected with the switch circuit in each parallel branch, the controller is used for detecting mains voltage, when the mains voltage is normal, the switch circuit is controlled to be closed, so that the mains voltage can charge the energy storage element, and when the mains voltage is abnormal, the switch circuit is controlled to be opened, so that the energy storage element supplies power for external equipment.
2. The multi-stage energy storage element parallel charging and discharging system according to claim 1, wherein the controller is further connected to the energy storage element in each parallel branch for detecting the capacity of the energy storage element and controlling the on and off of a switching circuit connected in series with the energy storage element according to the capacity.
3. The multi-stage energy storage element parallel charging and discharging system according to claim 1, wherein the switching circuit comprises a first power switching tube, a second power switching tube, a freewheeling diode, an energy storage filter inductor and a filter energy storage capacitor; the source electrode of the first power switch tube is connected with the source electrode of the second power switch tube, and the drain electrode of the first power switch tube is respectively connected with one end of the energy storage filter inductor and the negative electrode of the fly-wheel diode; the other end of the energy storage filter inductor is connected with the anode of the energy storage element, the anode of the freewheeling diode is connected with the cathode of the energy storage element, the anode of the filter energy storage capacitor is connected with the anode of the energy storage element, and the cathode of the filter energy storage capacitor is connected with the cathode of the energy storage element; the drain electrode of the second power switch tube is connected with the positive electrode of the bus voltage; and the grid electrode of the first power switch tube and the grid electrode of the second power switch tube are respectively connected with two output control ends of the controller.
4. The multi-stage energy storage element parallel charging and discharging system according to claim 3, wherein a current sampling resistor is further connected between the negative electrode of the energy storage element of the switching circuit and the negative electrode of the bus voltage, two ends of the current sampling resistor are respectively connected with the positive input end and the negative input end of the current sampling operational amplifier through a resistor, the output end of the current sampling operational amplifier is connected with the input end of the controller, and a feedback resistor is further connected between the output end of the current sampling operational amplifier and the negative input end of the current sampling operational amplifier.
5. The multi-stage energy storage element parallel charging and discharging system according to claim 1, wherein the switching circuit is connected with a mains supply through an AC-DC converter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921716238.9U CN210490543U (en) | 2019-10-14 | 2019-10-14 | Multi-stage energy storage element parallel charging and discharging system |
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| CN201921716238.9U CN210490543U (en) | 2019-10-14 | 2019-10-14 | Multi-stage energy storage element parallel charging and discharging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531752A (en) * | 2020-12-04 | 2021-03-19 | 薛飞 | Energy storage device management system, method and device |
| WO2022048678A1 (en) * | 2020-09-07 | 2022-03-10 | 国网新疆电力有限公司电力科学研究院 | Transformer dynamic thermal stabilization test device based on charging capacitance |
-
2019
- 2019-10-14 CN CN201921716238.9U patent/CN210490543U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022048678A1 (en) * | 2020-09-07 | 2022-03-10 | 国网新疆电力有限公司电力科学研究院 | Transformer dynamic thermal stabilization test device based on charging capacitance |
| CN112531752A (en) * | 2020-12-04 | 2021-03-19 | 薛飞 | Energy storage device management system, method and device |
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