CN209767220U - Power supply circuit and power supply device - Google Patents
Power supply circuit and power supply device Download PDFInfo
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- CN209767220U CN209767220U CN201920547472.7U CN201920547472U CN209767220U CN 209767220 U CN209767220 U CN 209767220U CN 201920547472 U CN201920547472 U CN 201920547472U CN 209767220 U CN209767220 U CN 209767220U
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Abstract
The utility model relates to a power supply circuit and a power supply device, which comprises a charging circuit, a booster circuit and a buffer circuit, wherein the charging circuit is connected with the buffer circuit through the booster circuit, and the output end of the buffer circuit is used for being connected with a distribution automation terminal; the buffer circuit comprises a buffer battery pack and a buffer capacitor, the output end of the booster circuit is connected with the anode of the buffer battery pack, the cathode of the buffer battery pack is used for grounding, and the output end of the booster circuit is also used for grounding through the buffer capacitor. The output end of the charging circuit outputs voltage, the voltage value is increased through the booster circuit, the voltage output by the booster circuit is charged for the buffer battery pack and the buffer capacitor, the output end of the buffer battery pack provides stable working voltage, the buffer capacitor needs to discharge after being full of, and instantaneous large current is provided during discharging, so that the remote control function of the power supply device for switching on and off the switch of the switch cabinet is realized.
Description
Technical Field
The utility model relates to a direct current power supply technical field especially relates to a power supply circuit and power supply unit.
Background
Besides 10kV switchgear, there are some low-voltage devices required in a general power distribution room, including: lighting equipment, a moistureproof lamp, a mouse repeller, an exhaust fan, a power distribution automation terminal and the like. To above-mentioned low-voltage apparatus need use the photovoltaic to get the electric technical solution and get the electric problem, especially distribution automation terminal wherein, not only can provide the illumination for distribution automation terminal, can also satisfy distribution automation terminal's remote control, telemetering measurement signal's collection, distribution automation terminal mainly is the switch deciliter of cubical switchboard to the remote control function of cubical switchboard, needs provide stable operating voltage for distribution automation terminal, and distribution automation terminal needs great electric current promptly.
However, the photovoltaic power-taking technology of the distribution automation terminal cannot provide stable working voltage, that is, cannot provide large current, so that the remote control function of the switch cabinet cannot be realized.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to provide a power supply circuit that outputs a stable operating voltage and a large current.
A power supply circuit comprising: the charging circuit is connected with the buffer circuit through the booster circuit, and the output end of the buffer circuit is used for being connected with a distribution automation terminal; buffer circuit is including buffering group battery and buffer capacitor, boost circuit's output with the anodal of buffering group battery is connected, the negative pole of buffering group battery is used for ground connection, boost circuit's output is still connected buffer capacitor just is used for passing through buffer capacitor ground connection.
In one embodiment, the buffer circuit further includes a detector and a controller, the output terminal of the boost circuit is connected to the buffer capacitor through the controller, and the output terminal of the boost circuit is further connected to the controller through the detector.
In one embodiment, the charging circuit comprises a photovoltaic panel and a power supply battery pack, an output end of the photovoltaic panel is connected with a positive electrode of the power supply battery pack, a negative electrode of the power supply battery pack is used for grounding, and a positive electrode of the power supply battery pack is further connected with an input end of the boosting circuit.
In one embodiment, the power supply circuit further comprises a battery voltage display, and the positive pole of the power supply battery pack is connected with the battery voltage display and is used for being grounded through the battery voltage display. In one embodiment, the charging circuit further includes a voltage detection circuit and a charging controller, the output terminal of the photovoltaic panel is connected to the positive electrode of the power supply battery pack through the charging controller, the control terminal of the voltage detection circuit is connected to the initialization terminal of the charging controller, and the detection terminal of the voltage detection circuit is connected to the positive electrode of the power supply battery pack.
In one embodiment, the charge controller comprises a large current controller and a floating charge controller, the output end of the photovoltaic panel is connected with the positive electrode of the power supply battery pack through the large current controller, the output end of the photovoltaic panel is also connected with the positive electrode of the power supply battery pack through the floating charge controller, the first control end of the voltage detection circuit is connected with the initialization end of the large current controller, and the second control end of the voltage detection circuit is connected with the initialization end of the floating charge controller.
In one embodiment, the power supply circuit further includes an overdischarge protection circuit, the positive electrode of the power supply battery pack is connected to the input terminal of the voltage boost circuit through the overdischarge protection circuit, and the third control terminal of the voltage detection circuit is connected to the initialization terminal of the overdischarge protection circuit.
In one embodiment, the power supply circuit further comprises an LED lamp, and an output terminal of the over-discharge protection circuit is connected to the LED lamp and is configured to be grounded through the LED lamp.
In one embodiment, the boost circuit comprises at least two sub-boost circuits connected in parallel.
A power supply apparatus comprising the power supply circuit described in any of the above embodiments.
Above-mentioned power supply circuit and power supply unit, charging circuit's output voltage, this voltage makes the magnitude of voltage increase through boost circuit, and the voltage of boost circuit output charges for buffering group battery and buffer capacitor, and the output of buffering group battery provides stable operating voltage, and buffer capacitor need discharge after being full of, provides instantaneous heavy current during discharge to realize power supply unit to the switch deciliter remote control function of switch cabinet.
Drawings
FIG. 1 is a circuit schematic of a power supply circuit of an embodiment;
Fig. 2 is a circuit schematic of a power supply circuit of another embodiment.
Detailed Description
in order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model relates to a power supply circuit. For example, the power supply circuit includes: the charging circuit is connected with the buffer circuit through the booster circuit, and the output end of the buffer circuit is used for being connected with a distribution automation terminal; buffer circuit is including buffering group battery and buffer capacitor, boost circuit's output with the anodal of buffering group battery is connected, the negative pole of buffering group battery is used for ground connection, boost circuit's output is still connected buffer capacitor just passes through buffer capacitor ground connection. Above-mentioned supply circuit, charging circuit's output voltage, this voltage makes the magnitude of voltage increase through boost circuit, and the voltage of boost circuit output charges for buffering group battery and buffer capacitor, and the output of buffering group battery provides stable operating voltage, and buffer capacitor need discharge after being full of, provides great electric current during discharging to the realization is to the remote control function of the switch deciliter of cubical switchboard.
Please refer to fig. 1, which is a schematic circuit diagram of a power supply circuit according to an embodiment of the present invention.
A power supply circuit 10 comprising: the charging circuit 100 is connected with the buffer circuit 300 through the booster circuit 200, and the output end B of the buffer circuit 300 is used for being connected with a distribution automation terminal; the snubber circuit 300 includes a snubber battery group S1 and a snubber capacitor C1, the output terminal of the voltage boost circuit 200 is connected to the positive terminal of the snubber battery group S1, the negative terminal of the snubber battery group S1 is used for grounding, the output terminal of the voltage boost circuit 200 is further connected to the snubber capacitor C1 and is used for grounding through the snubber capacitor C1.
In the above power supply circuit, the output end of the charging circuit 100 outputs a voltage, the voltage value is increased by the voltage boosting circuit 200, the voltage output by the voltage boosting circuit 200 charges the buffer battery pack S1 and the buffer capacitor C1, the output end of the buffer battery pack S1 provides a stable working voltage, the buffer capacitor C1 needs to discharge after being fully charged, and instantaneous large current is provided during discharging, so that a remote control function of switching on and off of the switch cabinet is realized.
In order to provide a stable output voltage, referring to fig. 1, the buffer circuit 300 further includes a detector D1 and a controller D2, the output terminal of the voltage boost circuit 200 is connected to the buffer capacitor C1 through the controller D2, and the output terminal of the voltage boost circuit 200 is connected to the controller D2 through the detector D1. The controller D2 is used for controlling the charging of the buffer capacitor C1, that is, when the buffer capacitor C1 is charged to a designated voltage value, the controller D2 controls the voltage and current output by the power supply circuit, and the detector D1 is used for detecting the current voltage of the buffer capacitor C1 and controlling the turning on and off of the controller D2. In one embodiment, the controller D2 includes a transistor and a switch connected in parallel with the transistor, the output terminal of the voltage boost circuit 200 is connected to the collector of the transistor, the emitter of the transistor is grounded through the buffer capacitor C1, the output terminal of the voltage boost circuit 200 is further connected to the base of the transistor through the detector D1, one end of the switch is connected to the collector of the transistor, and the other end of the switch is connected to the emitter of the transistor. When the power supply circuit is deactivated or stored, i.e. the power supply circuit is in a non-power-supplying state, i.e. no current is output from the output terminal of the power supply circuit, the voltage across the snubber capacitor C1 is close to zero, i.e. the amount of charge in the snubber capacitor C1 is substantially released, i.e. the snubber capacitor C1 completes the discharging operation. When the power-on operation is performed at this time, if the detector D1 and the controller D2 are not provided, the buffer battery pack S1 charges the buffer capacitor C1, so that the energy in the buffer battery pack S1 is reduced, and the operating voltage of the power supply output is unstable, and part of the current of the buffer battery pack S1 is connected to the voltage boost circuit 200, so that the voltage boost circuit 200 receives the impact of the reverse current, and even burns out the voltage boost circuit 200. In order to avoid the above situation, one end of the detector D1 is connected to the snubber capacitor C1 through the triode, so as to obtain the current voltage value of the snubber capacitor C1, and when the detector D1 detects that the voltage value of the snubber capacitor C1 is close to or equal to zero, the constant current for starting up is set to perform constant current charging on the snubber capacitor C1, for example, the constant current charging current is 0.8 to 1.2 amperes; as another example, the constant current charging current is 1 amp. The charging of the snubber capacitor C1 is continued until the voltage of the snubber capacitor C1 is raised to a specified value, for example, the voltage of the snubber capacitor C1 is 48 volts, so that the detector D1 controls the switch in the controller D2 to be closed, so that the voltage across the snubber capacitor C1 is the same as the voltage output by the power supply circuit, thereby stabilizing the working voltage output by the power supply circuit, and avoiding the damage of the power supply circuit to the snubber battery pack S1 and the voltage boost circuit 200 when the power supply circuit is turned on, thereby prolonging the service life of the snubber battery pack S1 and the voltage boost circuit 200.
In an embodiment, referring to fig. 1, the charging circuit 100 includes a photovoltaic panel PV1 and a power supply battery set S2, an output terminal of the photovoltaic panel PV1 is connected to an anode of the power supply battery set S2, a cathode of the power supply battery set S2 is used for grounding, and an anode of the power supply battery set S2 is further connected to an input terminal of the voltage boost circuit 200. In an embodiment, the power supply battery set S2 is composed of a plurality of storage batteries, the photovoltaic panel PV1 supplies power to the power supply battery set S2, that is, the photovoltaic panel PV1 charges the power supply battery set S2, that is, the photovoltaic panel PV1 converts solar energy into electric energy to be stored in the power supply battery set S2, and the power supply battery set S2 provides voltage for the voltage boosting circuit 200, so that the voltage boosting circuit 200 can boost voltage, and thus provide a designated operating voltage for the power supply circuit. In the present embodiment, the photovoltaic panel PV1 includes four solar panels with 300W/38V cell capacity.
In order to charge the power supply battery pack, please refer to fig. 1, the charging circuit 100 further includes a voltage detection circuit BG1 and a charging controller, an output end of the photovoltaic panel PV1 is connected to an anode of the power supply battery pack S2 through the charging controller, a control end of the voltage detection circuit BG1 is connected to an initialization end of the charging controller, and a detection end of the voltage detection circuit BG1 is connected to an anode of the power supply battery pack S2. In one embodiment, the charge controller is located between the photovoltaic panel PV1 and the power supply battery set S2, and the charge controller controls the photovoltaic panel PV1 to supply power to the power supply battery set S2, i.e. the charge controller controls the charging state of the photovoltaic panel PV 1. The voltage detection circuit BG1 is electrically connected to the electric controller D2, for example, a control terminal of the voltage detection circuit BG1 is connected to an initialization terminal of the charge controller, the voltage detection circuit BG1 controls a charging state of the charge controller, and the charge controller has a plurality of charging states, that is, the voltage detection circuit BG1 determines the charging state of the charge controller according to different situations of the power supply battery pack S2. The detection end of the voltage detection circuit BG1 is connected with the positive electrode of the power supply battery pack S2, and since the power supply battery pack S2 is a storage battery, that is, the voltage of the power supply battery pack S2 is gradually increased, the voltage detection circuit controls the charging controller according to the current voltage of the power supply battery pack S2, thereby executing different charging modes. In this way, the photovoltaic panel PV1 provides different charging modes for the power supply battery set S2, so as to facilitate charging of the power supply battery set S2, stabilize charging of the power supply battery set S2, and improve charging efficiency of the power supply battery set.
In order to further facilitate charging of the power supply battery pack, please refer to fig. 1, the charge controller includes a large current controller BG2 and a floating charge controller BG3, an output end of the photovoltaic panel PV1 is connected to an anode of the power supply battery pack S2 through the large current controller BG2, an output end of the photovoltaic panel PV1 is further connected to an anode of the power supply battery pack S2 through the floating charge controller BG3, a first control end of the voltage detection circuit BG1 is connected to an initialization end of the large current controller BG2, and a second control end of the voltage detection circuit BG1 is connected to an initialization end of the floating charge controller BG 3. In an embodiment, the output end of the photovoltaic panel PV1 is connected to the large current controller BG2 and the floating charge controller BG3, the voltage detection circuit BG1 controls and controls the large current controller BG2 and the floating charge controller BG3, and the voltage detection circuit BG1 selects different charge controllers to charge the power supply battery pack S2 according to the voltage signal collected by the detection end of the voltage detection circuit BG1 and the voltage value of the detection end of the voltage detection circuit BG 1. For example, when the voltage detected by the detection end of the voltage detection circuit BG1 is less than or equal to 60% -70% of the maximum voltage value of the power supply battery pack S2, the voltage detection circuit BG1 controls the large-current controller BG2, that is, the voltage detection circuit BG1 starts the large-current controller BG2, that is, the large-current controller BG2 is started, so that the photovoltaic panel PV1 charges the power supply battery pack S2 with a large current; for another example, when the voltage detected by the detection end of the voltage detection circuit BG1 is close to the maximum voltage value of the power supply battery pack S2, that is, the voltage detected by the detection end of the voltage detection circuit BG1 is greater than 70% of the maximum voltage value of the power supply battery pack S2, the voltage detection circuit BG1 controls the floating charge controller BG3, that is, the voltage detection circuit BG1 starts the floating charge controller BG3, that is, the voltage detection circuit BG1 starts the floating charge controller BG3, so that the photovoltaic panel PV1 performs floating charge on the power supply battery pack S2, and thus the photovoltaic panel PV1 performs continuous and long-time constant voltage charging on the power supply battery pack S2, thereby ensuring that the charging of the photovoltaic panel PV1 on the power supply battery pack S2 is stable; for another example, when the voltage detected by the detection terminal of the voltage detection circuit BG1 reaches the maximum voltage value of the power supply battery group S2, that is, the voltage of the power supply battery group S2 is charged to the rated voltage value, the voltage detection circuit BG1 controls the float controller BG3, and enters a float state. In this way, different charging controllers are selected according to the voltage value of the power supply battery pack S2 during charging, so that different charging modes of the power supply battery pack S2 are controlled, the charging of the power supply battery pack S2 is more stable, and the service life of the power supply battery pack S2 is prolonged.
In order to protect the power supply battery, referring to fig. 2, the power supply circuit further includes an overdischarge protection circuit BG4, an anode of the power supply battery S2 is connected to the input terminal of the voltage boost circuit 200 through the overdischarge protection circuit BG4, and a third control terminal of the voltage detection circuit BG1 is connected to an initialization terminal of the overdischarge protection circuit BG 4. In one embodiment, the overdischarge protection circuit BG4 serves as a secondary circuit, and the overdischarge protection circuit BG4 is connected to a positive electrode of the power supply battery set S2, so that the overdischarge protection circuit BG4 protects the power supply battery set S2 from damage to the power supply battery set S2, especially when the photovoltaic panel PV1 or the charge controller fails, the overdischarge protection circuit BG4 serves as an overdischarge turn-off control of the power supply battery set S2. The detection end of the voltage detection circuit BG1 is connected with the positive electrode of the power supply battery group S2, that is, the detection end of the voltage detection circuit BG1 collects the voltage of the positive electrode of the power supply battery group S2, when the voltage of the positive electrode of the power supply battery group S2 is abnormal, because the third control end of the voltage detection circuit BG1 is connected with the initialization end of the overdischarge protection circuit BG4, the third control end of the voltage detection circuit BG1 sends a control signal to the overdischarge protection circuit BG4, so as to start the initialization end of the overdischarge protection circuit BG4, that is, the overdischarge protection circuit BG4 is disconnected. In this embodiment, the overdischarge protection circuit BG4 includes a relay circuit, and when an abnormality occurs in the voltage of the positive electrode of the power supply battery group S2, the spring piece of the overdischarge protection circuit BG4 is opened, thereby improving the service life of the power supply battery group S2.
In an embodiment, the detector D1, the controller D2, the voltage detection circuit BG1, the large current controller BG2, the floating charge controller BG3 and the overdischarge protection circuit BG4 are commonly included in the power supply circuit, that is, the power supply circuit includes the detector D1, the controller D2, the voltage detection circuit BG1, the large current controller BG2, the floating charge controller BG3 and the overdischarge protection circuit BG4, so that stable voltages of the buffer battery group S1 and the power supply battery group S2 are ensured, stable operations of the buffer battery group S1 and the power supply battery group S2 are ensured, and service lives of the buffer battery group S1 and the power supply battery group S2 are prolonged.
In one embodiment, the power supply circuit further includes an LED lamp L1, and the output terminal of the overdischarge protection circuit BG4 is connected to the LED lamp L1 and is configured to be grounded through the LED lamp L1. LED lamp L1 provides the illumination, because in supply circuit is applied to the electricity room, the light environment in the electricity room is comparatively dim usually, the light of LED lamp L1 transmission makes the illumination luminance in the electricity room promote to make the light in the electricity room illuminate, and then the maintainer of being convenient for gets into the electricity room and maintains.
In one embodiment, the LED lamp is connected to the positive electrode of the power supply battery pack, and the LED lamp includes three color LED lamps, for example, when the voltage of the positive electrode of the power supply battery pack is less than or equal to 60% to 70% of the maximum voltage value of the power supply battery pack, the LED lamp emits red color light; for another example, when the voltage of the positive electrode of the power supply battery pack is close to the maximum voltage value of the power supply battery pack, that is, the voltage of the positive electrode of the power supply battery pack is greater than 70% of the maximum voltage value of the power supply battery pack and is smaller than the maximum voltage value of the power supply battery pack, the LED lamp emits yellow light; for another example, when the voltage of the power supply battery pack reaches the maximum voltage value of the power supply battery pack, that is, the voltage of the power supply battery pack is charged to the rated voltage value, the LED lamp emits green light. Therefore, the LED lamp reflects the real-time voltage value of the power supply battery pack by emitting light rays with different colors.
In one embodiment, the power supply circuit further comprises a battery voltage display U1, and the positive pole of the power supply battery pack S2 is connected to the battery voltage display U1 and grounded through the battery voltage display U1. The anodal of battery voltage display U1 with the anodal of power supply group battery S2 is connected, battery voltage display U1 'S negative pole is used for ground connection, promptly battery voltage display U1 with power supply group battery S2 is parallelly connected, battery voltage display U1 acquires in real time power supply group battery S2' S voltage value, because power supply group battery S2 is the battery, power supply group battery S2 'S voltage value is for changing always for maintainer passes through battery voltage display U1 acquires power supply group battery S2 is the voltage value when charging, and the maintainer of being convenient for directly perceived acquires power supply group battery S2' S voltage value.
In one embodiment, the voltage boost circuit 200 is used to boost the voltage output by the power supply battery pack S2 to a specified value, for example, the voltage output by the photovoltaic panel PV1 is 36V, the maximum voltage value of the power supply battery pack S2 is 24V, when the power supply battery pack S2 is charged to a rated voltage of 24V, the voltage boost circuit 200 boosts the rated voltage output by the power supply battery pack S2, that is, the voltage at the input terminal of the voltage boost circuit 200 is 24V, and the voltage at the output terminal of the voltage boost circuit 200 is 48V. Because the voltage boosting circuit 200 boosts the voltage value of the power supply battery pack S2 to a specified output voltage, that is, the voltage 24V of the power supply battery pack S2 is boosted to 48V, that is, the electric energy of the photovoltaic panel PV1 is stored in the power supply battery pack S2, and then the voltage is boosted to the working voltage required by the power supply circuit through the voltage boosting circuit 200. Therefore, the situation that the voltage of the photovoltaic panel PV1 is directly boosted to the working voltage required by the power supply circuit by the booster circuit 200 is avoided, namely the situation that the 36V output voltage of the photovoltaic panel PV1 is boosted to 48V and then output to 48V by the booster circuit 200 is avoided, the buffer battery pack S1 is further avoided, the utilization rate of the photovoltaic panel PV1 is improved, the electric quantity loss in the boosting process is avoided, the situation that the power supply circuit emits too much heat is avoided, and the heat dissipation by using a heat dissipation device is omitted.
In one embodiment, the boost circuit 200 includes at least two sub-boost circuits V1 connected in parallel. Since at least two of the sub-booster circuits V1 are arranged in parallel, at least two of the sub-booster circuits V1 are arranged independently of each other. For example, two of the sub voltage boost circuits V1 are provided in parallel, each of the sub voltage boost circuits V1 can boost the voltage output from the overdischarge protection circuit BG4 to a rated voltage, and when one of the sub voltage boost circuits V1 fails, the other sub voltage boost circuit V1 performs a voltage boosting operation.
In one embodiment, each of the sub-boosting circuits V1 is connected in series with a diode D3, that is, the output terminal of the sub-boosting circuit V1 is connected to the anode of the diode D3, and the cathode of the diode D3 is connected to the anode of the buffer battery S1. In this way, the current output by the sub-boost circuit V1 passes through the corresponding diode D3 and charges the buffer battery pack S1, thereby preventing the current of the buffer battery pack S1 from being introduced into the sub-boost circuit V1, and preventing the sub-boost circuit V1 from being damaged.
In an embodiment, an output voltage display U2 is connected to a negative electrode of the diode D3, and the output voltage display U2 is used for displaying the output voltage of the voltage boost circuit 200, so that a maintenance worker can monitor the output voltage of the power supply circuit in real time.
The utility model also provides a power supply unit, including the supply circuit in above-mentioned arbitrary embodiment.
Above-mentioned power supply circuit and power supply unit, charging circuit's output voltage, this voltage makes the magnitude of voltage increase through boost circuit, and the voltage of boost circuit output charges for buffering group battery and buffer capacitor, and the output of buffering group battery provides stable operating voltage, and buffer capacitor need discharge after being full of, provides great electric current during discharging to realize power supply unit to the switch deciliter remote control function of switch cabinet.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A power supply circuit, comprising: the charging circuit is connected with the buffer circuit through the booster circuit, and the output end of the buffer circuit is used for being connected with a distribution automation terminal;
Buffer circuit is including buffering group battery and buffer capacitor, boost circuit's output with the anodal of buffering group battery is connected, the negative pole of buffering group battery is used for ground connection, boost circuit's output is still connected buffer capacitor just is used for passing through buffer capacitor ground connection.
2. the power supply circuit according to claim 1, wherein the snubber circuit further comprises a detector and a controller, the output terminal of the boost circuit is connected to the snubber capacitor through the controller, and the output terminal of the boost circuit is further connected to the controller through the detector.
3. The power supply circuit according to claim 1, wherein the charging circuit comprises a photovoltaic panel and a power supply battery pack, an output terminal of the photovoltaic panel is connected with a positive terminal of the power supply battery pack, a negative terminal of the power supply battery pack is used for grounding, and a positive terminal of the power supply battery pack is further connected with an input terminal of the voltage boost circuit.
4. The power supply circuit of claim 3, further comprising a battery voltage display, the positive pole of the power supply battery pack being connected to the battery voltage display and configured to be grounded via the battery voltage display.
5. The power supply circuit according to claim 3, wherein the charging circuit further comprises a voltage detection circuit and a charging controller, the output terminal of the photovoltaic panel is connected to the positive electrode of the power supply battery pack through the charging controller, the control terminal of the voltage detection circuit is connected to the initialization terminal of the charging controller, and the detection terminal of the voltage detection circuit is connected to the positive electrode of the power supply battery pack.
6. The power supply circuit according to claim 5, wherein the charge controller comprises a high current controller and a float controller, the output terminal of the photovoltaic panel is connected to the positive electrode of the power supply battery pack through the high current controller, the output terminal of the photovoltaic panel is further connected to the positive electrode of the power supply battery pack through the float controller, the first control terminal of the voltage detection circuit is connected to the initialization terminal of the high current controller, and the second control terminal of the voltage detection circuit is connected to the initialization terminal of the float controller.
7. The power supply circuit according to claim 5, further comprising an overdischarge protection circuit through which the positive electrode of the power supply battery pack is connected to the input terminal of the voltage boosting circuit, and the third control terminal of the voltage detection circuit is connected to an initialization terminal of the overdischarge protection circuit.
8. The power supply circuit of claim 7, further comprising an LED lamp, wherein an output terminal of the over-discharge protection circuit is connected to the LED lamp and is configured to be grounded via the LED lamp.
9. Supply circuit according to any of claims 1 to 8, characterized in that the boost circuit comprises at least two sub-boost circuits connected in parallel.
10. A power supply device characterized by comprising a power supply circuit as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920547472.7U CN209767220U (en) | 2019-04-19 | 2019-04-19 | Power supply circuit and power supply device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920547472.7U CN209767220U (en) | 2019-04-19 | 2019-04-19 | Power supply circuit and power supply device |
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| CN209767220U true CN209767220U (en) | 2019-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962523A (en) * | 2019-04-19 | 2019-07-02 | 广州供电局有限公司 | Power supply circuit and power supply unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962523A (en) * | 2019-04-19 | 2019-07-02 | 广州供电局有限公司 | Power supply circuit and power supply unit |
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Effective date of registration: 20201021 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |