CN212412841U - Automatic seamless input protection system for storage battery of direct-current system - Google Patents
Automatic seamless input protection system for storage battery of direct-current system Download PDFInfo
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- CN212412841U CN212412841U CN202022104336.6U CN202022104336U CN212412841U CN 212412841 U CN212412841 U CN 212412841U CN 202022104336 U CN202022104336 U CN 202022104336U CN 212412841 U CN212412841 U CN 212412841U
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- 238000001514 detection method Methods 0.000 claims abstract description 114
- 238000007781 pre-processing Methods 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 60
- 230000002457 bidirectional effect Effects 0.000 claims description 24
- 230000001629 suppression Effects 0.000 claims description 24
- 230000001052 transient effect Effects 0.000 claims description 24
- 230000003287 optical effect Effects 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000002955 isolation Methods 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The utility model provides a direct current system's automatic seamless input protection system of battery, including controller, the first detecting element that is used for detecting direct current system's fuse action, the second detecting element that is used for detecting battery voltage, the third detecting element that is used for detecting direct current busbar voltage, preprocessing unit, electrical unit and output control unit; the detection input end of the controller is connected with the output end of the first detection unit, the output ends of the second detection unit and the third detection unit are connected with the input end of the preprocessing unit, the output end of the preprocessing unit is connected with the controller, the control output end of the controller is connected with the control input end of the output control unit, the output control unit respectively sends control signals to a user terminal and a storage battery input switch, and the power supply unit converts 220V alternating current into 5V direct current and supplies the 5V direct current to all electric devices; whether the storage battery is separated from the direct-current bus or whether the fuse fusing action of the direct-current system causes the direct-current system power failure can be accurately judged.
Description
Technical Field
The utility model relates to a protection system especially relates to an automatic seamless input protection system of battery of direct current system.
Background
In a transformer substation, when a direct-current power supply system operates, a storage battery is forbidden to be separated from a direct-current bus, and once the storage battery is separated from the direct-current bus, if an alternating-current power loss accident happens at the moment, the transformer substation loses the protection of the direct-current system, so that serious consequences are caused, such as a large amount of primary equipment including a main transformer is burnt, so that a power supply accident is caused, and serious economic loss is brought.
Based on the above, how to ensure the reliable connection between the storage battery and the dc bus in the dc power supply system becomes a technical problem, which is how to judge whether the power loss of the dc system is the disconnection of the storage battery or the fusing action of the fuse of the dc system when overvoltage and overcurrent occur, if the fusing action of the fuse of the dc system is performed, the re-inputting action is not needed, and if the action of the electrically controlled air switch between the storage battery and the dc bus is controlled at this time, the malfunction is caused, and there is a potential safety hazard.
Therefore, in order to solve the above technical problems, it is necessary to provide a new technical means.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an automatic seamless input protection system of battery of direct current system can be whether to cause for the fuse fusing action that the battery breaks away from direct current bus or direct current system when losing the electricity to direct current system and accurately judge to in time drop into the action again when confirming for the battery breaks away from direct current bus, thereby ensure direct current system's stability, effectively avoid because the battery breaks away from and the power supply potential safety hazard that comes.
The utility model provides a direct current system's automatic seamless input protection system of battery, including controller, the first detecting element that is used for detecting direct current system's fuse action, the second detecting element that is used for detecting battery voltage, the third detecting element that is used for detecting direct current busbar voltage, preprocessing unit, electrical unit and output control unit;
the detection input end of the controller is connected with the output end of the first detection unit, the output ends of the second detection unit and the third detection unit are connected with the input end of the preprocessing unit, the preprocessing unit is used for converting analog signals output by the second detection unit and the third detection unit into digital signals and transmitting the digital signals to the controller, the controller puts the storage battery disconnected from the direct current bus into the direct current bus again according to signals output by the first detection unit, the second detection unit and the third detection unit, the control output end of the controller is connected with the control input end of the output control unit, the output control unit sends control signals to a user terminal and a storage battery input switch respectively, and the power supply unit converts 220V alternating current into 5V direct current and provides the 5V direct current for various electric appliances.
Further, the preprocessing unit comprises an analog-to-digital conversion circuit and a reference voltage circuit, an output end of the reference voltage circuit is connected with a reference signal input end of the analog-to-digital conversion circuit, an input end of the preprocessing circuit is respectively connected with input ends of the third detection unit and the second detection unit, and the analog-to-digital conversion circuit is in communication connection with the controller.
Further, the analog-to-digital conversion circuit is an AD7606BBSTZ chip, and the reference voltage circuit is a REF5025AIDR chip.
Further, the second detection unit comprises a resistor R11, a resistor R12, a resistor R13, a resistor R14, a bidirectional transient suppression diode D1, a bidirectional transient suppression diode D2, a capacitor C5 and a capacitor C7;
one end of the resistor R11 is an input end of the second detection unit and is connected to the lithium battery, the other end of the resistor R11 is connected with one end of the resistor R13 through the resistor R12, the other end of the resistor R13 is connected with one end of the resistor R14, the other end of the resistor R14 is an output end of the second detection unit, the capacitor C6 and the bidirectional transient suppression diode D1 are connected in parallel with the resistor R12, and the capacitor C7 and the bidirectional transient suppression diode D2 are connected in parallel with the resistor R13.
Further, the third detection unit comprises a resistor R15, a resistor R16, a resistor R17, a resistor R18, a bidirectional transient suppression diode D3, a bidirectional transient suppression diode D4, a capacitor C9 and a capacitor C8;
one end of the resistor R15 is an input end of the third detection unit and is connected to the positive electrode of the direct current bus, the other end of the resistor R15 is connected with one end of the resistor R17 through the resistor R16, the other end of the resistor R17 is connected with one end of the resistor R18, the other end of the resistor R18 is an output end of the third detection unit, the capacitor C9 and the bidirectional transient suppression diode D3 are connected in parallel with the resistor R16, and the capacitor C8 and the bidirectional transient suppression diode D4 are connected in parallel with the resistor R17.
Further, the first detection unit comprises two detection circuits with the same structure and an isolation circuit;
the input end of the isolation circuit is connected with the output end of the power supply unit, the output end of the isolation circuit is connected with the first power supply end of the detection circuit, and the second power supply end of the detection circuit is connected with the 3.3V power supply;
the detection circuit comprises an optical coupler OC1, a resistor R8 and a resistor R7;
a light emitting diode of the optical coupler OC1 is connected with one end of a resistor R7, the other end of the resistor R7 is a first power supply end of a detection circuit, the negative electrode of the light emitting diode of the optical coupler OC1 is a detection input end of the detection circuit, an emitter of a phototriode of the optical coupler OC1 is grounded, a collector of the phototriode of the optical coupler OC1 is connected with one end of a resistor R8, the other end of the resistor R8 is a second power supply end of the detection circuit, and a collector of the phototriode of the optical coupler OC1 is connected with the detection input end of a controller as an output end of;
the detection input ends of the two detection circuits are respectively connected with a positive auxiliary contact and a negative auxiliary contact of a fuse of the direct current system.
Further, the output control unit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a capacitor C1, a capacitor C2, a capacitor C3, a triode Q1, a triode Q2, a triode Q3, a relay J1, a relay J2, a relay J3, a voltage regulator DZ1, a voltage regulator DZ2 and a voltage regulator DZ 3;
one end of a resistor R1 is connected with the output end of the power supply unit, the other end of the resistor R1 is grounded through a capacitor C1, the common connection point of the capacitor C1 and the resistor R1 is connected with the collector of a triode Q1 through a coil of a relay J1, the common connection point of the resistor R1 and the capacitor C1 is connected with the negative electrode of a voltage regulator tube DZ1, the positive electrode of the voltage regulator tube DZ1 is connected with the collector of a triode Q1, the emitter of the triode Q1 is grounded, the base of a triode Q1 is connected with the control output end of the controller through a resistor R4, and a switch of the relay J1 is connected with the detection input end;
one end of a resistor R2 is connected with the output end of the power supply unit, the other end of the resistor R2 is grounded through a capacitor C2, the common connection point of the capacitor C2 and the resistor R2 is connected with the collector of a triode Q2 through a coil of a relay J2, the common connection point of the resistor R2 and the capacitor C2 is connected with the negative electrode of a voltage stabilizing tube DZ2, the positive electrode of the voltage stabilizing tube DZ2 is connected with the collector of a triode Q2, the emitter of the triode Q2 is grounded, the base of a triode Q2 is connected with the control output end of the controller through a resistor R5, and the switch of the relay J1 is connected with an electrically controlled air;
one end of a resistor R3 is connected with the output end of the power supply unit, the other end of the resistor R3 is grounded through a capacitor C3, the common connection point of the capacitor C3 and the resistor R3 is connected with the collector of a triode Q3 through a coil of a relay J3, the common connection point of the resistor R3 and the capacitor C3 is connected with the negative electrode of a voltage regulator tube DZ3, the positive electrode of the voltage regulator tube DZ3 is connected with the collector of a triode Q3, the emitter of the triode Q3 is grounded, the base of a triode Q3 is connected with the control output end of the controller through a resistor R6, and a switch of the relay J3 is connected with the detection input end.
Further, the controller is an STM32F407VET6 chip.
Further, the power supply unit is an LED05-20B05 module.
Further, the isolation circuit is a B0505 chip.
The utility model has the advantages that: through the utility model discloses, whether fuse fusing action that can break away from direct current generating line or direct current system for the battery arouses to carry out accurate judgement when direct current system loses the electricity to in time drop into the action again when confirming for the battery breaks away from direct current generating line, thereby ensure direct current system's stability, effectively avoid because the battery breaks away from the power supply potential safety hazard that brings.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the output control unit of the present invention.
Fig. 3 is a schematic diagram of the detection circuit of the present invention.
Fig. 4 is a schematic diagram of a second detecting unit of the present invention.
Fig. 5 is a schematic diagram of a third detecting unit of the present invention.
Fig. 6 is a schematic diagram of the isolation circuit of the present invention.
Fig. 7 is a schematic diagram of the controller of the present invention.
Fig. 8 is a schematic diagram of an analog-to-digital conversion circuit according to the present invention.
Fig. 9 is a schematic diagram of a reference circuit according to the present embodiment.
Detailed Description
The invention is described in further detail below with reference to the drawings in the specification:
the utility model provides a direct current system's automatic seamless input protection system of battery, including controller, the first detecting element that is used for detecting direct current system's fuse action, the second detecting element that is used for detecting battery voltage, the third detecting element that is used for detecting direct current busbar voltage, preprocessing unit, electrical unit and output control unit;
the detection input end of the controller is connected with the output end of the first detection unit, the output ends of the second detection unit and the third detection unit are connected with the input end of the preprocessing unit, the preprocessing unit is used for converting the analog signals output by the second detection unit and the third detection unit into digital signals and transmitting the digital signals to the controller, the controller is used for inputting the storage battery disconnected on the direct current bus into the direct current bus again according to the signals output by the first detection unit, the second detection unit and the third detection unit, the control output end of the controller is connected with the control input end of the output control unit, the output control unit respectively sends control signals to the user terminal and the storage battery input switch, the power supply unit converts 220V alternating current into 5V direct current and supplies the 5V direct current to each electric device, wherein the controller is an STM32F407VET6 chip; the power supply unit is an LED05-20B05 module, a 3.3V power supply is arranged for supplying power to the first detection unit, the power supply unit is used for converting 5V direct current output by the power supply unit into 3.3V direct current, an SPX-1117M3 chip is adopted, and of course, the controller and the analog-to-digital conversion circuit also have 3.3V power supply terminals.
In this embodiment, the preprocessing unit includes an analog-to-digital conversion circuit and a reference voltage circuit, an output end of the reference voltage circuit is connected to a reference signal input end of the analog-to-digital conversion circuit, an input end of the preprocessing circuit is connected to input ends of the third detection unit and the second detection unit, and the analog-to-digital conversion circuit is in communication connection with the controller.
The analog-to-digital conversion circuit is an AD7606BBSTZ chip, the reference voltage circuit is a REF5025AIDR chip, and by the above structure, the analog voltage signals output by the second detection unit and the third detection unit can be converted into digital voltage signals, thereby facilitating the identification and control of the controller, wherein the output end of the second detection unit is connected to pin 6 of the analog-to-digital conversion circuit, the output end of the third detection unit is connected to pin 7 of the analog-to-digital conversion circuit, pin 42 of the analog-to-digital conversion circuit is used as the input end of the reference voltage signal and is connected to the output end of the reference circuit, the connection relationship between the analog-to-digital conversion circuit and the controller is as the pin description in the figure, the pins of the controller are numerous and are not completely drawn, only a part is given, and the part embodies the connection relationship between the controller and the analog-to-digital conversion circuit, the, a display is also provided for displaying the monitored condition, the display is communicatively coupled to the controller, and a memory is coupled to the controller, employs an HT24LC256 memory, and is communicatively coupled to the controller.
In this embodiment, the second detecting unit includes a resistor R11, a resistor R12, a resistor R13, a resistor R14, a bidirectional transient suppression diode D1, a bidirectional transient suppression diode D2, a capacitor C5, and a capacitor C7;
one end of the resistor R11 is an input end of the second detection unit and is connected to the lithium battery, the other end of the resistor R11 is connected with one end of the resistor R13 through the resistor R12, the other end of the resistor R13 is connected with one end of the resistor R14, the other end of the resistor R14 is an output end of the second detection unit, the capacitor C6 and the bidirectional transient suppression diode D1 are connected in parallel with the resistor R12, and the capacitor C7 and the bidirectional transient suppression diode D2 are connected in parallel with the resistor R13.
The third detection unit comprises a resistor R15, a resistor R16, a resistor R17, a resistor R18, a bidirectional transient suppression diode D3, a bidirectional transient suppression diode D4, a capacitor C9 and a capacitor C8;
one end of the resistor R15 is the input end of the third detection unit and is connected with the anode of the direct current bus, the other end of the resistor R15 is connected with one end of the resistor R17 through the resistor R16, the other end of the resistor R17 is connected with one end of the resistor R18, the other end of the resistor R18 is the output end of the third detection unit, the capacitor C9 and the bidirectional transient suppression diode D3 are connected with the resistor R16 in parallel, and the capacitor C8 and the bidirectional transient suppression diode D4 are connected with the resistor R17 in parallel.
In this embodiment, the first detection unit includes two detection circuits and an isolation circuit with the same structure;
the input end of the isolation circuit is connected with the output end of the power supply unit, the output end of the isolation circuit is connected with the first power supply end of the detection circuit, and the second power supply end of the detection circuit is connected with the 3.3V power supply;
the detection circuit comprises an optical coupler OC1, a resistor R8 and a resistor R7;
a light emitting diode of the optical coupler OC1 is connected with one end of a resistor R7, the other end of the resistor R7 is a first power supply end of a detection circuit, the negative electrode of the light emitting diode of the optical coupler OC1 is a detection input end of the detection circuit, an emitter of a phototriode of the optical coupler OC1 is grounded, a collector of the phototriode of the optical coupler OC1 is connected with one end of a resistor R8, the other end of the resistor R8 is a second power supply end of the detection circuit, and a collector of the phototriode of the optical coupler OC1 is connected with the detection input end of a controller as an output end of;
the detection input ends of the two detection circuits are respectively connected with a positive auxiliary contact and a negative auxiliary contact of a fuse of a direct current system, the two detection circuits are provided in fig. 3, the two detection circuits have the same structure, only the labeled serial numbers of elements are different, and because the output of the detection circuit is high and low level and is directly connected with the controller, if the power supply module is directly connected with a power supply terminal of the detection circuit, the controller is easily damaged, and good isolation is realized through an isolation circuit, so that a good protection effect is achieved, wherein the isolation circuit is a B0505 chip; the output ends of the two detection circuits are respectively connected with pins 33 and 34 of the controller.
In this embodiment, the output control unit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a capacitor C1, a capacitor C2, a capacitor C3, a triode Q1, a triode Q2, a triode Q3, a relay J1, a relay J2, a relay J3, a voltage regulator DZ1, a voltage regulator DZ2, and a voltage regulator DZ 3;
one end of a resistor R1 is connected with the output end of the power supply unit, the other end of the resistor R1 is grounded through a capacitor C1, the common connection point of the capacitor C1 and the resistor R1 is connected with the collector of a triode Q1 through a coil of a relay J1, the common connection point of the resistor R1 and the capacitor C1 is connected with the negative electrode of a voltage regulator tube DZ1, the positive electrode of the voltage regulator tube DZ1 is connected with the collector of a triode Q1, the emitter of the triode Q1 is grounded, the base of a triode Q1 is connected with the control output end of the controller through a resistor R4, and a switch of the relay J1 is connected with the detection input end;
one end of a resistor R2 is connected with the output end of the power supply unit, the other end of the resistor R2 is grounded through a capacitor C2, the common connection point of the capacitor C2 and the resistor R2 is connected with the collector of a triode Q2 through a coil of a relay J2, the common connection point of the resistor R2 and the capacitor C2 is connected with the negative electrode of a voltage stabilizing tube DZ2, the positive electrode of the voltage stabilizing tube DZ2 is connected with the collector of a triode Q2, the emitter of the triode Q2 is grounded, the base of a triode Q2 is connected with the control output end of the controller through a resistor R5, and the switch of the relay J1 is connected with an electrically controlled air;
one end of a resistor R3 is connected with the output end of the power supply unit, the other end of the resistor R3 is grounded through a capacitor C3, the common connection point of the capacitor C3 and the resistor R3 is connected with the collector of a triode Q3 through a coil of a relay J3, the common connection point of the resistor R3 and the capacitor C3 is connected with the negative electrode of a voltage regulator tube DZ3, the positive electrode of the voltage regulator tube DZ3 is connected with the collector of a triode Q3, the emitter of the triode Q3 is grounded, the base of a triode Q3 is connected with the control output end of the controller through a resistor R6, and a switch of the relay J3 is connected with the detection input end;
the existing electric control air switch for controlling the electrical connection relation between the storage battery and the direct current bus is controlled to be closed by the switch closure of the relay, the storage battery is put into a direct current system, after the normally open switches of the relay J1 and the relay J3 are closed, the normally open switches are used for pulling down the point position of a detection circuit of a user terminal, and therefore alarm information is sent to the user terminal, the relay J1 is closed to represent the storage battery separation alarm, the relay J3 represents the direct current bus power-off alarm, the triode Q1 is connected to the 47 pin of the controller through the resistor R4, the triode Q2 is connected to the 48 pin of the controller through the resistor R5, and the triode Q3 is connected to the 54 pin of the controller through the resistor R6.
The specific method for judging whether the storage battery is separated from the direct current system by the controller is as follows:
cathodes of light emitting diodes of the optical coupler OC1 and the optical coupler OC2 are respectively connected to an auxiliary contact of the direct current fuse, wherein the auxiliary contact of the direct current fuse is a detection point of the direct current fuse and is used for judging whether the direct current fuse has a fusing action, if the direct current fuse is fused, a positive auxiliary contact and a negative auxiliary contact of the direct current fuse both output low levels, and if the direct current fuse is normal, the positive auxiliary contact and the negative auxiliary contact output high levels;
when the cathodes of the light emitting diodes of the two optocouplers are low levels, the optocouplers are switched on, so that pins connected with the controller and the optocouplers are switched from high levels to low levels.
The second detection unit and the third detection unit respectively detect the voltages of the storage battery and the direct current bus, and when the difference value of the two voltages is smaller than a set value, the connection of the storage battery is normal at the moment, and the controller does not output a control instruction;
when the difference value of the two voltages is larger than a set value, whether the current direct current fuse acts is judged, if yes, the current storage battery is judged to be separated from a direct current system, the controller outputs a control command to the output control unit, the output control unit executes the command, the command comprises the steps of alarming to a user terminal, and controlling the electric control air switch to be closed again, wherein the user terminal comprises an existing single chip microcomputer, a display, an alarm and the like.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (10)
1. The utility model provides an automatic seamless input protection system of battery of direct current system which characterized in that: the system comprises a controller, a first detection unit for detecting the action of a fuse of a direct current system, a second detection unit for detecting the voltage of a storage battery, a third detection unit for detecting the voltage of a direct current bus, a preprocessing unit, a power supply unit and an output control unit;
the detection input end of the controller is connected with the output end of the first detection unit, the output ends of the second detection unit and the third detection unit are connected with the input end of the preprocessing unit, the preprocessing unit is used for converting analog signals output by the second detection unit and the third detection unit into digital signals and transmitting the digital signals to the controller, the controller puts the storage battery disconnected from the direct current bus into the direct current bus again according to signals output by the first detection unit, the second detection unit and the third detection unit, the control output end of the controller is connected with the control input end of the output control unit, the output control unit sends control signals to a user terminal and a storage battery input switch respectively, and the power supply unit converts 220V alternating current into 5V direct current and provides the 5V direct current for various electric appliances.
2. The automatic seamless input protection system for the storage battery of the direct current system according to claim 1, characterized in that: the preprocessing unit comprises an analog-digital conversion circuit and a reference voltage circuit, the output end of the reference voltage circuit is connected with the reference signal input end of the analog-digital conversion circuit, the input end of the preprocessing circuit is respectively connected with the input ends of the third detection unit and the second detection unit, and the analog-digital conversion circuit is in communication connection with the controller.
3. The automatic seamless input protection system for the storage battery of the direct current system according to claim 2, characterized in that: the analog-to-digital conversion circuit is an AD7606BBSTZ chip, and the reference voltage circuit is a REF5025AIDR chip.
4. The automatic seamless input protection system for the storage battery of the direct current system according to claim 2, characterized in that: the second detection unit comprises a resistor R11, a resistor R12, a resistor R13, a resistor R14, a bidirectional transient suppression diode D1, a bidirectional transient suppression diode D2, a capacitor C5 and a capacitor C7;
one end of the resistor R11 is an input end of the second detection unit and is connected to the lithium battery, the other end of the resistor R11 is connected with one end of the resistor R13 through the resistor R12, the other end of the resistor R13 is connected with one end of the resistor R14, the other end of the resistor R14 is an output end of the second detection unit, the capacitor C6 and the bidirectional transient suppression diode D1 are connected in parallel with the resistor R12, and the capacitor C7 and the bidirectional transient suppression diode D2 are connected in parallel with the resistor R13.
5. The automatic seamless input protection system for the storage battery of the direct current system according to claim 2, characterized in that: the third detection unit comprises a resistor R15, a resistor R16, a resistor R17, a resistor R18, a bidirectional transient suppression diode D3, a bidirectional transient suppression diode D4, a capacitor C9 and a capacitor C8;
one end of the resistor R15 is an input end of the third detection unit and is connected to the positive electrode of the direct current bus, the other end of the resistor R15 is connected with one end of the resistor R17 through the resistor R16, the other end of the resistor R17 is connected with one end of the resistor R18, the other end of the resistor R18 is an output end of the third detection unit, the capacitor C9 and the bidirectional transient suppression diode D3 are connected in parallel with the resistor R16, and the capacitor C8 and the bidirectional transient suppression diode D4 are connected in parallel with the resistor R17.
6. The automatic seamless input protection system for the storage battery of the direct current system according to claim 1, characterized in that: the first detection unit comprises two detection circuits and an isolation circuit which have the same structure;
the input end of the isolation circuit is connected with the output end of the power supply unit, the output end of the isolation circuit is connected with the first power supply end of the detection circuit, and the second power supply end of the detection circuit is connected with the 3.3V power supply;
the detection circuit comprises an optical coupler OC1, a resistor R8 and a resistor R7;
a light emitting diode of the optical coupler OC1 is connected with one end of a resistor R7, the other end of the resistor R7 is a first power supply end of a detection circuit, the negative electrode of the light emitting diode of the optical coupler OC1 is a detection input end of the detection circuit, an emitter of a phototriode of the optical coupler OC1 is grounded, a collector of the phototriode of the optical coupler OC1 is connected with one end of a resistor R8, the other end of the resistor R8 is a second power supply end of the detection circuit, and a collector of the phototriode of the optical coupler OC1 is connected with the detection input end of a controller as an output end of;
the detection input ends of the two detection circuits are respectively connected with a positive auxiliary contact and a negative auxiliary contact of a fuse of the direct current system.
7. The automatic seamless input protection system for the storage battery of the direct current system according to claim 1, characterized in that: the output control unit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a capacitor C1, a capacitor C2, a capacitor C3, a triode Q1, a triode Q2, a triode Q3, a relay J1, a relay J2, a relay J3, a voltage regulator tube DZ1, a voltage regulator tube DZ2 and a voltage regulator tube DZ 3;
one end of a resistor R1 is connected with the output end of the power supply unit, the other end of the resistor R1 is grounded through a capacitor C1, the common connection point of the capacitor C1 and the resistor R1 is connected with the collector of a triode Q1 through a coil of a relay J1, the common connection point of the resistor R1 and the capacitor C1 is connected with the negative electrode of a voltage regulator tube DZ1, the positive electrode of the voltage regulator tube DZ1 is connected with the collector of a triode Q1, the emitter of the triode Q1 is grounded, the base of a triode Q1 is connected with the control output end of the controller through a resistor R4, and a switch of the relay J1 is connected with the detection input end;
one end of a resistor R2 is connected with the output end of the power supply unit, the other end of the resistor R2 is grounded through a capacitor C2, the common connection point of the capacitor C2 and the resistor R2 is connected with the collector of a triode Q2 through a coil of a relay J2, the common connection point of the resistor R2 and the capacitor C2 is connected with the negative electrode of a voltage stabilizing tube DZ2, the positive electrode of the voltage stabilizing tube DZ2 is connected with the collector of a triode Q2, the emitter of the triode Q2 is grounded, the base of a triode Q2 is connected with the control output end of the controller through a resistor R5, and the switch of the relay J1 is connected with an electrically controlled air;
one end of a resistor R3 is connected with the output end of the power supply unit, the other end of the resistor R3 is grounded through a capacitor C3, the common connection point of the capacitor C3 and the resistor R3 is connected with the collector of a triode Q3 through a coil of a relay J3, the common connection point of the resistor R3 and the capacitor C3 is connected with the negative electrode of a voltage regulator tube DZ3, the positive electrode of the voltage regulator tube DZ3 is connected with the collector of a triode Q3, the emitter of the triode Q3 is grounded, the base of a triode Q3 is connected with the control output end of the controller through a resistor R6, and a switch of the relay J3 is connected with the detection input end.
8. The automatic seamless input protection system for the storage battery of the direct current system according to claim 1, characterized in that: the controller is an STM32F407VET6 chip.
9. The automatic seamless input protection system for the storage battery of the direct current system according to claim 1, characterized in that: the power supply unit is an LED05-20B05 module.
10. The automatic seamless input protection system for the storage battery of the direct current system according to claim 6, characterized in that: the isolation circuit is a B0505 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022104336.6U CN212412841U (en) | 2020-09-23 | 2020-09-23 | Automatic seamless input protection system for storage battery of direct-current system |
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