CN216851387U - Portable mobile power supply device - Google Patents
Portable mobile power supply device Download PDFInfo
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- CN216851387U CN216851387U CN202221309361.0U CN202221309361U CN216851387U CN 216851387 U CN216851387 U CN 216851387U CN 202221309361 U CN202221309361 U CN 202221309361U CN 216851387 U CN216851387 U CN 216851387U
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Abstract
The utility model relates to a power technical field provides a portable power supply device, including shared battery, DC unit and the DC AC unit that connects gradually, the control end of DC unit and DC AC unit all is connected with the main control unit, the DC unit includes power module and drive power module's drive circuit, power module includes a plurality of IGBT, drive circuit includes bus transceiver U1 and at least optical coupler, optical coupler with the IGBT one-to-one sets up, and wherein optical coupler is optical coupling U2, bus transceiver U1's A1 end with the first output of main control unit is connected, bus transceiver U1's B1 termination is gone into optical coupling U2's output inserts the control end of IGBT. Through above-mentioned technical scheme, solved among the prior art and had a power failure suddenly and lead to equipment can not normally work, give people the life inconvenient problem of bringing.
Description
Technical Field
The utility model relates to a power technology field, it is specific, relate to a portable power source device.
Background
In other sectors of modern industry, agriculture and national economy, electricity is used as a major power source, such as: electric lamps, telephones, movies, televisions, computers, radio broadcasts, etc. are all without power. In actual life, due to reasons such as planned maintenance of a power grid, failure of power distribution facilities, natural disasters and artificial damage, power failure of a house can be caused, power of electric equipment is cut off, work is stopped, and inconvenience is brought to life of people.
SUMMERY OF THE UTILITY MODEL
The utility model provides a portable power source device has solved and has had a power failure suddenly among the correlation technique and lead to equipment can not normally work, give people the life problem of bringing inconvenience.
The technical scheme of the utility model as follows: comprises a shared battery, a DC/DC unit and a DC/AC unit which are connected in sequence, the control ends of the DC/DC unit and the DC/AC unit are connected with a main control unit,
the DC/DC unit comprises a power module and a driving circuit for driving the power module, the power module comprises a plurality of IGBTs, the driving circuit comprises a bus transceiver U1 and at least one optical coupler, the optical coupler and the IGBTs are arranged in a one-to-one correspondence manner, one optical coupler is an optical coupler U2, the A1 end of the bus transceiver U1 is connected with the first output end of the main control unit, the B1 end of the bus transceiver U1 is connected into the Cathodode end of the optical coupler U2, the Anode end of the optical coupler U2 is connected with a power supply 5V, the Collector end of the optical coupler U2 is connected with the grid electrode of the IGBT, and the Emitter end of the optical coupler U2 is connected with the Emitter of the IGBT,
the DC/DC unit further comprises a fault detection circuit and a protection circuit, the fault detection circuit comprises a resistor R3, a resistor R4, a capacitor C1, an operational amplifier U5A and an operational amplifier U6, the resistor R3 and the capacitor C1 are connected in series between a collector and an emitter of the IGBT, the resistor R4 is connected in parallel with the resistor R3, one end of the capacitor C1 is connected to a non-inverting input end of the operational amplifier U5A through a resistor R16, the other end of the capacitor C1 is connected to an inverting input end of the operational amplifier U5A through a resistor R21, an output end of the operational amplifier U5A is connected to the inverting input end through a resistor R11 in a feedback manner, and the non-inverting input end of the operational amplifier U5A is also connected to the ground through a resistor R5,
the output end of the operational amplifier U5A is connected to the non-inverting input end of the operational amplifier U6, the inverting input end of the operational amplifier U6 is connected with the reference voltage VREF, the output end of the operational amplifier U6 is used as the output end of the fault detection circuit,
protection circuit is including the opto-coupler U7 and the D trigger U8 that connect gradually, the input diode positive pole of opto-coupler U7 passes through resistance R39 and connects power 15V, the input diode negative pole of opto-coupler U7 with fault detection circuit's output is connected, the output triode collecting electrode of opto-coupler U7 passes through resistance R38 and connects power 5V, the output triode collecting electrode of opto-coupler U7 still inserts D trigger U8's 1D end, opto-coupler U7's output triode projecting pole ground connection, 1Q termination of D trigger U8 is gone into bus transceiver U1's messenger's ability end.
Further, the reference source circuit comprises a resistor R7 and a resistor R6 which are connected in series, one end of the resistor R7 is connected with a power supply 5V, one end of the resistor R6 is grounded, and a series point of the resistor R7 and the resistor R6 is used as a reference voltage VREF and is connected to the inverting input end of the operational amplifier U6.
Further, the reset circuit comprises a KEY1, a resistor R9 and a capacitor C3, wherein the KEY1 is connected with the resistor R9 in series, one end of the KEY1 is connected with a power supply 5V, one end of the resistor R9 is grounded, the capacitor C3 is connected with the resistor R9 in parallel,
the serial point of the KEY1 and the resistor R9 is used as the output of a reset circuit and is connected to the reset end of the D flip-flop U8.
Furthermore, the shared battery and the DC/DC units are in multiple paths, the multiple paths of shared batteries and the multiple paths of DC/DC units are arranged in a one-to-one correspondence mode, and any path of DC/DC unit is connected to the input end of the DC/AC unit sequentially through a resistor and a diode.
Further, the collector of the output triode of the optocoupler U7 is connected to the first input end of the main control unit,
still include outage control circuit, outage control circuit includes relay K1, opto-coupler U9 and triode Q1, opto-coupler U9's input diode positive pole with the second output of main control unit is connected, opto-coupler U9's input diode negative pole ground connection, opto-coupler U9's output triode emitter ground connection, opto-coupler U9's output triode collecting electrode passes through resistance R13 and connects power 5V, opto-coupler U9's output triode collecting electrode still inserts triode Q1's base, triode Q1's emitter ground connection, triode Q1's collecting electrode with the one end of relay K1 coil is connected, the other end and the power 5V of relay K1 coil are connected, relay K1's normally open contact is in series the shared battery with between the DC/DC unit.
The utility model discloses a theory of operation and beneficial effect do:
the utility model discloses when using, can be by sharing battery power supply, sharing battery's voltage after DC/DC unit steps up, converts the alternating current that needs into through DC/AC unit again, for the equipment power supply. The working principle of the driving circuit is as follows: taking the example that the optocoupler U2 drives the corresponding IGBT, after a control signal output by the main control unit is amplified sequentially through the bus transceiver U1 and isolated by the optocoupler U2, the Collector end of the optocoupler U2 is connected to the gate of the IGBT, and the Emitter end of the optocoupler U2 is connected to the Emitter of the IGBT to control the on-off of the IGBT; the fault detection circuit is used for detecting the working state of the IGBT, when the IGBT works normally, the fault detection circuit outputs a low level signal, the low level signal is connected to the input end of the optocoupler U7, an output triode in the optocoupler U7 is conducted, the input end of the D trigger U8 obtains the low level signal, the output end of the D trigger U8 outputs the low level signal to the enabling end of the bus transceiver U1, the bus transceiver U1 works normally, and a control signal output by the main control unit is connected to the control end of the IGBT sequentially through the bus transceiver U1 and the optocoupler U2; when the IGBT breaks down, the fault detection circuit outputs a high level signal, the high level signal is connected to the input end of the optocoupler U7, the output triode inside the optocoupler U7 is cut off, the input end of the D trigger U8 obtains the high level signal, the output end of the D trigger U8 outputs the high level signal to the enabling end of the bus transceiver U1, the bus transceiver U1 does not work, the output of the control signal is closed, the IGBT is timely disconnected, and the damage of the IGBT is avoided.
The utility model discloses portable power source device utilizes the shared battery to provide interim power for equipment, guarantees the normal work of important equipment, circuit structure is simple, work safe and reliable.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a block diagram of the circuit schematic of the present invention;
FIG. 2 is a schematic diagram of a driving circuit of the present invention;
FIG. 3 is a schematic diagram of a protection circuit of the present invention;
FIG. 4 is a schematic diagram of a middle fault detection circuit according to the present invention;
FIG. 5 is a schematic diagram of the interrupt control circuit of the present invention;
in the figure: the circuit comprises a driving circuit 1, a protection circuit 2, a fault detection circuit 3, a reset circuit 4 and a power-off control circuit 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive work, are related to the scope of the present invention.
As shown in fig. 1-3, the battery pack comprises a shared battery, a DC/DC unit and a DC/AC unit which are connected in sequence, control terminals of the DC/DC unit and the DC/AC unit are both connected with a main control unit,
the DC/DC unit comprises a power module and a driving circuit for driving the power module, the power module comprises a plurality of IGBTs, the driving circuit comprises a bus transceiver U1 and at least one optical coupler, the optical coupler and the IGBTs are arranged in a one-to-one correspondence manner, one optical coupler is an optical coupler U2, the A1 end of the bus transceiver U1 is connected with the first output end of the main control unit, the B1 end of the bus transceiver U1 is connected with the Cathode end of the optical coupler U2, the Anode end of the optical coupler U2 is connected with a power supply 5V, the Collector end of the optical coupler U2 is connected with the grid of the IGBT, the Emitter end of the optical coupler U2 is connected with the Emitter of the IGBT,
the DC/DC unit further comprises a fault detection circuit and a protection circuit, the fault detection circuit comprises a resistor R3, a resistor R4, a capacitor C1, an operational amplifier U5A and an operational amplifier U6, the resistor R3 and the capacitor C1 are connected between a collector and an emitter of the IGBT in series, the resistor R4 is connected with the resistor R3 in parallel, one end of the capacitor C1 is connected to a non-inverting input end of the operational amplifier U5A through the resistor R16, the other end of the capacitor C1 is connected to an inverting input end of the operational amplifier U5A through the resistor R21, an output end of the operational amplifier U5A is connected to the inverting input end through the resistor R11 in a feedback mode, the non-inverting input end of the operational amplifier U5A is also connected to the ground through the resistor R5,
the output end of the operational amplifier U5A is connected with the non-inverting input end of the operational amplifier U6, the inverting input end of the operational amplifier U6 is connected with the reference voltage VREF, the output end of the operational amplifier U6 is used as the output end of the fault detection circuit,
protection circuit is including the opto-coupler U7 and the D trigger U8 that connect gradually, the input diode positive pole of opto-coupler U7 passes through resistance R39 and connects power 15V, the input diode negative pole of opto-coupler U7 with fault detection circuit's output is connected, the output triode collecting electrode of opto-coupler U7 passes through resistance R38 and connects power 5V, the output triode collecting electrode of opto-coupler U7 still inserts D trigger U8's 1D end, opto-coupler U7's output triode projecting pole ground connection, 1Q termination of D trigger U8 is gone into bus transceiver U1's messenger's ability end.
When the power supply device is used, the power can be supplied by the shared battery, and the voltage of the shared battery is boosted by the DC/DC unit and then converted into required alternating current by the DC/AC unit to supply power to equipment. The working principle of the driving circuit is as follows: taking the example that the optocoupler U2 drives the corresponding IGBT, after a control signal PWM1A output by the main control unit is amplified by the bus transceiver U1 and isolated by the optocoupler U2 in sequence, the Collector end of the optocoupler U2 is connected to the grid electrode of the IGBT, and the Emitter end of the optocoupler U2 is connected to the Emitter electrode of the IGBT to control the on-off of the IGBT; the fault detection circuit is used for detecting the working state of the IGBT, when the IGBT works normally, the fault detection circuit outputs a low level signal, the low level signal is connected to the input end of the optocoupler U7, an output triode in the optocoupler U7 is conducted, the input end of the D trigger U8 obtains the low level signal, the output end of the D trigger U8 outputs the low level signal to the enabling end of the bus transceiver U1, the bus transceiver U1 works normally, and a control signal output by the main control unit is connected to the control end of the IGBT sequentially through the bus transceiver U1 and the optocoupler U2; when the IGBT breaks down, the fault detection circuit outputs a high level signal, the high level signal is connected to the input end of the optocoupler U7, the output triode inside the optocoupler U7 is cut off, the input end of the D trigger U8 obtains the high level signal, the output end of the D trigger U8 outputs the high level signal to the enabling end of the bus transceiver U1, the bus transceiver U1 does not work, the output of the control signal is closed, the IGBT is timely disconnected, and the damage of the IGBT is avoided.
The working principle of the fault detection circuit is as follows: when the IGBT has an overcurrent fault, the voltage at the two ends of the IGBT CE is increased, the voltage at the two ends of the IGBT CE charges the capacitor C1 through the resistor R3 and the resistor R4, and the voltage at the two ends of the capacitor C1 is increased; the operational amplifier U5A forms a subtraction operation circuit and operates the voltage at the two ends of the capacitor C1; the output end of the operational amplifier U5A is connected with the non-inverting input end of the operational amplifier U6, and the operational amplifier U6 forms a comparator circuit; when the output voltage of the operational amplifier U5A rises to be greater than the reference voltage VREF, the operational amplifier U5A outputs a Fault signal Fault of high level.
The mobile power supply device of the embodiment utilizes the shared battery to provide temporary power supply for the equipment, ensures the normal work of important equipment, and has simple circuit structure and safe and reliable work.
It should be noted that the main control unit may adopt control chips such as a currently general single chip microcomputer, a DSP, an ARM, and the like, and specifically adopts a DSP chip TMS320F2806 in this embodiment.
Further, the reference source circuit is further included, as shown in fig. 4, the reference source circuit includes a resistor R7 and a resistor R6 which are connected in series, one end of the resistor R7 is connected with the power supply 5V, one end of the resistor R6 is grounded, and a series point of the resistor R7 and the resistor R6 is used as a reference voltage VREF and is connected to the inverting input terminal of the operational amplifier U6.
The resistor R7 and the resistor R6 form a series voltage division circuit, the series voltage division circuit is connected between a power supply 5V and the ground, and the terminal voltage of the resistor R6 is used as a reference voltage VREF; according to actual needs, the reference voltage can be adjusted by adjusting the sizes of the resistor R7 and the resistor R6, and the circuit is simple in structure and convenient to operate.
Further, the reset circuit is also included, as shown in fig. 3, the reset circuit includes a KEY1, a resistor R9 and a capacitor C3, the KEY1 is connected in series with the resistor R9, one end of the KEY1 is connected to the power supply 5V, one end of the resistor R9 is grounded, the capacitor C3 is connected in parallel with the resistor R9,
the serial point of the KEY1 and the resistor R9 is used as the output of the reset circuit and is connected to the reset end of the D flip-flop U8.
When the fault factor is eliminated, by pressing the KEY1, a reset signal RST is output to the reset end of the D flip-flop U8, the D flip-flop U8 is reset, the output end 1Q of the D flip-flop U8 outputs a low-level signal OE to the enable end of the bus transceiver U1, the bus transceiver U1 is enabled again, and the circuit starts to work again.
Further, as shown in fig. 1, the shared battery and the DC/DC units are both multi-path, and the multi-path shared battery and the multi-path DC/DC units are arranged in a one-to-one correspondence manner, and any one path of DC/DC unit is connected to the input end of the DC/AC unit sequentially through the resistor and the diode.
The multi-path shared battery and the multi-path DC/DC unit form a redundant power supply circuit to supply power for the DC/AC unit, so that when one path of power supply is insufficient or fails, other power supply circuits can supply power, and continuous power supply of the embodiment is ensured. In fig. 1, the diode D1 is used for isolation between multiple power supply circuits, and the resistor R10 is a current limiting resistor.
Further, as shown in fig. 3, the collector of the output transistor of the optocoupler U7 is connected to the first input terminal of the main control unit, and as shown in fig. 5, the optocoupler further includes a power-off control circuit,
the outage control circuit includes relay K1, opto-coupler U9 and triode Q1, opto-coupler U9's input diode positive pole with the second output of main control unit is connected, opto-coupler U9's input diode negative pole ground connection, opto-coupler U9's output triode emitter ground connection, opto-coupler U9's output triode collecting electrode passes through resistance R13 and connects power 5V, opto-coupler U9's output triode collecting electrode still inserts triode Q1's base, triode Q1's emitter ground connection, triode Q1's collecting electrode with the one end of relay K1 coil is connected, the other end and the power 5V of relay K1 coil are connected, relay K1's normally open contact is in series the shared battery with between the DC/DC unit.
In this embodiment, the output end of the optocoupler U7 is also simultaneously connected to the first input end of the main control unit, and the main control unit determines whether the DC/DC unit has a fault according to a signal received by the first input end; meanwhile, the power-off control circuit is further arranged in the embodiment, when the main control unit receives a fault signal of a certain DC/DC unit, the connection between the DC/DC unit and the shared battery is disconnected in time, other DC/DC units supply power to the DC/AC unit, the normal power supply of the whole power supply is not influenced, and meanwhile, the DC/DC unit is convenient to overhaul.
The working principle of the power-off control circuit is as follows: taking the 1# DC/DC unit in fig. 1 as an example, when the DC/DC unit normally works, an output end of the optocoupler U7 outputs a low level ALARM signal to a first input end of the main control unit, the main control unit outputs a low level signal KM _ CTRL to an input end of the optocoupler U9 at a second output end according to a signal of the first input end, the optocoupler U9 is turned off, an output end of the optocoupler U9 is at a high level, the triode Q1 is turned on, a coil of the relay K1 is energized, a normally open contact of the relay K1 is closed, and the shared battery supplies power to the DC/DC unit; when the DC/DC unit of the circuit has a fault, an output end of the optocoupler U7 outputs a high-level ALARM signal to a first input end of the main control unit, the main control unit outputs a high-level signal KM _ CTRL to an input end of the optocoupler U9 at a second output end of the main control unit according to the signal of the first input end, the optocoupler U9 is switched on, an output end of the optocoupler U9 is grounded, the triode Q1 is cut off, a coil of the relay K1 is powered off, a normally-open contact of the relay K1 is disconnected, and the DC/DC unit of the circuit is timely disconnected from the shared battery.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A portable mobile power supply device is characterized by comprising a shared battery, a DC/DC unit and a DC/AC unit which are connected in sequence, wherein the control ends of the DC/DC unit and the DC/AC unit are connected with a main control unit,
the DC/DC unit comprises a power module and a driving circuit (1) for driving the power module, the power module comprises a plurality of IGBTs, the driving circuit (1) comprises a bus transceiver U1 and at least one optical coupler, the optical coupler and the IGBTs are arranged in a one-to-one correspondence manner, one optical coupler is an optical coupler U2, the A1 end of the bus transceiver U1 is connected with the first output end of the main control unit, the B1 end of the bus transceiver U1 is connected into the Catode end of the optical coupler U2, the Antode end of the optical coupler U2 is connected with a power supply 5V, the Collector end of the optical coupler U2 is connected with the grid electrode of the IGBT, and the emiter end of the optical coupler U2 is connected with the Emitter electrode of the IGBT,
the DC/DC unit further comprises a fault detection circuit (3) and a protection circuit (2), the fault detection circuit (3) comprises a resistor R3, a resistor R4, a capacitor C1, an operational amplifier U5A and an operational amplifier U6, the resistor R3 and the capacitor C1 are connected between a collector and an emitter of the IGBT in series, the resistor R4 is connected with the resistor R3 in parallel, one end of the capacitor C1 is connected to a non-inverting input end of the operational amplifier U5A through a resistor R16, the other end of the capacitor C1 is connected to an inverting input end of the operational amplifier U5A through a resistor R21, an output end of the operational amplifier U5A is connected to the inverting input end through a resistor R11 in a feedback manner, the non-inverting input end of the operational amplifier U5A is also connected to the ground through a resistor R5,
the output end of the operational amplifier U5A is connected with the non-inverting input end of the operational amplifier U6, the inverting input end of the operational amplifier U6 is connected with the reference voltage VREF, the output end of the operational amplifier U6 is used as the output end of the fault detection circuit (3),
protection circuit (2) are including the opto-coupler U7 and the D trigger U8 that connect gradually, the input diode positive pole of opto-coupler U7 passes through resistance R39 and connects power 15V, the input diode negative pole of opto-coupler U7 with the output of fault detection circuit (3) is connected, the output triode collecting electrode of opto-coupler U7 passes through resistance R38 and connects power 5V, the output triode collecting electrode of opto-coupler U7 still inserts D trigger U8's 1D end, the output triode projecting electrode ground connection of opto-coupler U7, 1Q end of D trigger U8 is gone into bus transceiver U1's messenger can end.
2. The portable mobile power supply device as claimed in claim 1, further comprising a reference source circuit, wherein the reference source circuit comprises a resistor R7 and a resistor R6 connected in series, one end of the resistor R7 is connected to a power supply 5V, one end of the resistor R6 is connected to ground, and a series connection point of the resistor R7 and the resistor R6 is used as a reference voltage VREF and is connected to an inverting input terminal of the operational amplifier U6.
3. The portable mobile power supply device according to claim 1, further comprising a reset circuit (4), wherein the reset circuit (4) comprises a KEY1, a resistor R9 and a capacitor C3, the KEY1 is connected in series with the resistor R9, one end of the KEY1 is connected to a power supply 5V, one end of the resistor R9 is connected to ground, the capacitor C3 is connected in parallel with the resistor R9,
the serial point of the KEY1 and the resistor R9 is used as the output of a reset circuit (4) and is connected to the reset end of the D flip-flop U8.
4. The portable mobile power supply device according to claim 1, wherein the shared battery and the DC/DC units are all multiplexed, the multiplexed shared battery and the multiplexed DC/DC units are arranged in a one-to-one correspondence manner, and any one of the DC/DC units is connected to the input end of the DC/AC unit sequentially through a resistor and a diode.
5. The portable power supply device as claimed in claim 1, wherein a collector of an output transistor of the optocoupler U7 is connected to the first input terminal of the main control unit,
still include outage control circuit (5), outage control circuit (5) include relay K1, opto-coupler U9 and triode Q1, opto-coupler U9's input diode positive pole with the second output of main control unit is connected, opto-coupler U9's input diode negative pole ground connection, opto-coupler U9's output triode emitter ground connection, opto-coupler U9's output triode collecting electrode passes through resistance R13 and connects power 5V, opto-coupler U9's output triode collecting electrode still inserts triode Q1's base, triode Q1's emitter ground connection, triode Q1's collecting electrode with the one end of relay K1 coil is connected, the other end and the power 5V of relay K1 coil are connected, relay K1's contact is established ties the shared battery with between the DC/DC unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221309361.0U CN216851387U (en) | 2022-05-30 | 2022-05-30 | Portable mobile power supply device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221309361.0U CN216851387U (en) | 2022-05-30 | 2022-05-30 | Portable mobile power supply device |
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| Publication Number | Publication Date |
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| CN216851387U true CN216851387U (en) | 2022-06-28 |
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| CN202221309361.0U Active CN216851387U (en) | 2022-05-30 | 2022-05-30 | Portable mobile power supply device |
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| CN (1) | CN216851387U (en) |
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- 2022-05-30 CN CN202221309361.0U patent/CN216851387U/en active Active
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