CN108075562B - High-power portable electric equipment and power supply control device and method thereof - Google Patents
High-power portable electric equipment and power supply control device and method thereof Download PDFInfo
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- CN108075562B CN108075562B CN201711143887.XA CN201711143887A CN108075562B CN 108075562 B CN108075562 B CN 108075562B CN 201711143887 A CN201711143887 A CN 201711143887A CN 108075562 B CN108075562 B CN 108075562B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000003466 welding Methods 0.000 claims description 31
- 238000001914 filtration Methods 0.000 claims description 18
- 238000007600 charging Methods 0.000 claims description 14
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000005070 sampling Methods 0.000 abstract description 16
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 9
- 229910052744 lithium Inorganic materials 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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Abstract
The embodiment of the application provides high-power portable electric equipment and a power supply control device and method thereof, wherein the device comprises a first direct current power supply and a second direct current power supply; the input end of the controllable switch is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply, and the output end of the controllable switch forms the output of the power supply control device; and the detection end of the control unit is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply through corresponding signal acquisition modules, and the control end of the control unit is coupled with the control end of the controllable switch and is used for controlling the switching state of the controllable switch according to the sampling signals acquired by the detection end. The embodiment of the application can improve the operation duration of the high-power portable electric equipment, so that the high-power portable electric equipment has portability and continuous operation capability.
Description
Technical Field
The application relates to the technical field, in particular to high-power portable electric equipment and a power supply control device and method thereof.
Background
High-power portable electric equipment (such as an electric welding machine, a cutting machine and the like) in industrial production needs to be connected with an alternating current power supply for use, and a fuel generator is generally required to be matched with the electric equipment in places without alternating current power supply for operation. However, the fuel generator has large volume, heavy weight and difficult transportation, can not meet the application of working conditions such as high-altitude operation, underground pipeline maintenance, mine construction, emergency disaster relief and the like, and can bring environmental protection problems such as air pollution, noise pollution and the like when in operation.
Aiming at the problems, wireless welding and cutting equipment powered by a lithium battery appears in the market at present, and the wireless welding and cutting equipment has the advantages of portability and no pollution, can fully work for 10-30 minutes after single charging, and is very suitable for short-time emergency use in the field. However, this device also has significant drawbacks, as it is limited by the capacity of the rechargeable battery pack, and the single-pass operation time is short, while the battery charging time is relatively long, and it is not possible to meet the continuous production operation requirements.
Disclosure of Invention
The embodiment of the application aims to provide high-power portable electric equipment and a power supply control device and method thereof, so as to improve the operation duration of the existing high-power portable electric equipment.
In order to achieve the above object, in one aspect, an embodiment of the present application provides a power control device for a high-power portable electric device, including:
the first direct current power supply and the second direct current power supply;
the input end of the controllable switch is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply, and the output end of the controllable switch forms the output of the power supply control device;
and the detection end of the control unit is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply through corresponding signal acquisition modules, and the control end of the control unit is coupled with the control end of the controllable switch and is used for controlling the switching state of the controllable switch according to the sampling signals acquired by the detection end.
Preferably, the controlling the switching state of the controllable switch according to the sampling signal obtained by the detection end includes:
and processing the voltage signal acquired by the detection end according to a preset algorithm, and controlling the switching state of the controllable switch according to a processing result.
Preferably, the processing the voltage signal obtained by the detection end according to a preset algorithm, and controlling the switching state of the controllable switch according to the processing result includes:
confirming whether the first direct current power supply is connected with alternating current or not according to the voltage signal obtained by the detection end;
when the first direct current power supply is confirmed to be connected with alternating current, determining whether an output voltage value of the first direct current power supply is in a preset voltage range;
and when the output voltage value of the first direct current power supply is confirmed to be in the preset voltage range, controlling the controllable switch to work in the first direct current power supply output mode.
Preferably, the preset algorithm further includes:
and when the output voltage value of the first direct current power supply is confirmed to be outside the preset voltage range, controlling the controllable switch to work in the second direct current power supply output mode.
Preferably, when the output voltage value of the first dc power supply is determined to be within the preset voltage range, the controlling the controllable switch to operate in the first dc power supply output mode includes:
and when the output voltage value of the first direct current power supply is confirmed to be in the preset voltage range and the output end of the controllable switch is accessed without load, controlling the controllable switch to work in the first direct current power supply output mode.
Preferably, the preset algorithm further includes:
when the output voltage value of the first direct current power supply is confirmed to be in the preset voltage range, and the output end of the controllable switch is connected with a load, the current state of the controllable switch is maintained.
Preferably, the preset voltage range is a (1±b%), wherein a is a rated voltage value of the second dc power supply, and b is a preset constant.
Preferably, the method further comprises:
and the charging module is respectively coupled with the first direct current power supply, the second direct current power supply and the control unit and is used for charging the second direct current power supply by using the first direct current power supply under the control of the control unit.
Preferably, the second dc power source comprises a rechargeable battery pack.
Preferably, the rechargeable battery pack is detachable.
Preferably, the first direct current power supply includes:
an ac input terminal;
and the input end of the rectifying and filtering module is coupled with the alternating current input terminal, and the output end of the rectifying and filtering module is respectively coupled with the control unit and the controllable switch.
Preferably, the first dc power supply further includes:
and the rectification filter module is respectively coupled with the control unit and the controllable switch through the direct-current converter.
Preferably, the first dc power supply further includes:
and the input end of the first inversion arc welding circuit is coupled with the output end of the rectifying and filtering module, the output end of the first inversion arc welding circuit is coupled with the input end of the controllable switch, and the first inversion arc welding circuit is controlled by the control unit.
Preferably, the second dc power supply further includes:
and a DC converter coupled to the control unit and the rechargeable battery pack, respectively.
Preferably, the second dc power supply further includes:
and a second inverter arc welding circuit coupled to the control unit and the rechargeable battery pack, respectively.
On the other hand, the embodiment of the application also provides high-power portable electric equipment, which comprises a power supply control device and a load coupled with the output end of the power supply control device; the power supply control device includes:
the first direct current power supply and the second direct current power supply;
the input end of the controllable switch is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply, and the output end of the controllable switch forms the output of the power supply control device;
and the detection end of the control unit is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply through corresponding signal acquisition modules, and the control end of the control unit is coupled with the control end of the controllable switch and is used for controlling the switching state of the controllable switch according to the sampling signals acquired by the detection end.
Preferably, the high-power portable electric equipment is a portable electric welding machine or a portable cutting machine.
On the other hand, the embodiment of the application also provides a power supply control method of the high-power portable electric equipment, which comprises the following steps:
acquiring a sampling signal of a first direct current power supply and a second direct current power supply;
controlling the switching state of the controllable switch according to the sampling signal; wherein,
the input end of the controllable switch is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply, and the output end of the controllable switch forms the output of the power supply control device;
the detection end of the control unit is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply through corresponding signal acquisition modules, and the control end of the control unit is coupled with the control end of the controllable switch.
Preferably, the controlling the switching state of the controllable switch according to the voltage signal obtained by the detection end includes:
and processing the voltage signal acquired by the detection end according to a preset algorithm, and controlling the switching state of the controllable switch according to a processing result.
Preferably, the processing the voltage signal obtained by the detection end according to a preset algorithm, and controlling the switching state of the controllable switch according to the processing result includes:
confirming whether the first direct current power supply is connected with alternating current or not according to the voltage signal obtained by the detection end;
when the first direct current power supply is confirmed to be connected with alternating current, determining whether an output voltage value of the first direct current power supply is in a preset voltage range;
and when the output voltage value of the first direct current power supply is confirmed to be in the preset voltage range, controlling the controllable switch to work in the first direct current power supply output mode.
Preferably, the preset algorithm further includes:
and when the output voltage value of the first direct current power supply is confirmed to be outside the preset voltage range, controlling the controllable switch to work in the second direct current power supply output mode.
Preferably, when the output voltage value of the first dc power supply is determined to be within the preset voltage range, the controlling the controllable switch to operate in the first dc power supply output mode includes:
and when the output voltage value of the first direct current power supply is confirmed to be in the preset voltage range and the output end of the controllable switch is accessed without load, controlling the controllable switch to work in the first direct current power supply output mode.
Preferably, the preset algorithm further includes:
when the output voltage value of the first direct current power supply is confirmed to be in the preset voltage range, and the output end of the controllable switch is connected with a load, the current state of the controllable switch is maintained.
Preferably, the preset voltage range is a (1±b%), wherein a is a rated voltage value of the second dc power supply, and b is a preset constant.
The power supply control device of the high-power portable electric equipment comprises a first direct-current power supply, a second direct-current power supply, a controllable switch and a control unit; the input end of the controllable switch is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply, and the output end of the controllable switch forms the output of the power supply control device; the detection end of the control unit is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply through the corresponding signal acquisition modules, the control end of the control unit is coupled with the control end of the controllable switch, and the control unit is used for controlling the switching state of the controllable switch according to the sampling signals acquired by the detection end, so that the control unit can automatically select one of the first direct current power supply and the second direct current power supply as the power supply of the high-power portable electric equipment according to the situation, the operation duration of the high-power portable electric equipment is prolonged, the high-power portable electric equipment has portability and continuous operation capability, and can work under the condition of alternating current or not, and the application scene of the high-power portable electric equipment is greatly expanded.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a schematic block diagram of a power control device of a high-power portable electric device according to an embodiment of the present application;
FIG. 2 is a schematic block diagram of a power control device of a high-power portable electric device according to another embodiment of the present application;
FIG. 3 is a schematic block diagram of a power control device of a high-power portable electric device according to another embodiment of the present application;
FIG. 4 is a schematic block diagram of a power control device of a high-power portable electric device according to another embodiment of the present application;
FIG. 5 is a schematic block diagram of a power control device of a high-power portable electric device according to another embodiment of the present application;
FIG. 6 is a schematic block diagram of a power control device of a high-power portable electric device according to another embodiment of the present application;
FIG. 7 is a flowchart of a power control method of a high-power portable electric device according to an embodiment of the present application;
FIG. 8 is a flowchart of a power control method of a high-power portable electric device according to an embodiment of the present application;
FIG. 9 is a schematic circuit diagram of a power control device of a high-power portable electric device according to an embodiment of the present application;
fig. 10 is a schematic circuit diagram of a power control device of a high-power portable electric device according to another embodiment of the present application.
Detailed Description
In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, shall fall within the scope of the application.
The high-power portable electric equipment provided by the embodiment of the application can comprise a power supply control device and a load coupled with the output end of the power supply control device; the power supply of the load can be selected by the power supply control device. In some embodiments, the high-power portable electric device may be, for example, a portable electric welding machine, a portable cutting machine, or the like, and the high-power portable electric device is generally powered by a battery.
Referring to fig. 1, in this embodiment, the power control device of the high-power portable electric device may include a first dc power supply, a second dc power supply, a controllable switch, and a control unit. The mode has simple structure and high efficiency.
In this embodiment, the input ends of the controllable switch are respectively coupled with the output ends of the first dc power supply and the second dc power supply, and the output ends of the controllable switch form the output of the power supply control device; the detection end of the control unit is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply through corresponding signal acquisition modules, and the control end of the control unit is coupled with the control end of the controllable switch. The control unit is used for controlling the switching state of the controllable switch according to the sampling signal acquired by the detection end, so that the selection and control of the power supply of the load are realized.
In this embodiment, the high-power portable electric device may include a dc output of the power control device as a power supply of the high-power portable electric device (e.g. an electric welding machine and a cutting machine), so as to form a high-power portable electric device with plug-in hybrid power, so that the high-power portable electric device has portability and continuous operation capability, can work under the condition of having or not having ac, and greatly expands the application scenario of the high-power portable electric device.
In another embodiment, as shown in fig. 6, the power control device of the high-power portable electric device may further include a charging module, which is respectively coupled to the first dc power supply, the second dc power supply, and the control unit; the charging module can charge the second direct current power supply by using the first direct current power supply under the control of the control unit, namely, the direct current output by the first direct current power supply is used as input to charge the second direct current power supply. In some embodiments, the charging may be constant current charging, constant voltage charging, or constant power charging.
When the second direct current power supply has charging conditions (normal voltage is not full power, normal temperature), the control unit starts the charging module; when the second dc power supply is abnormal (such as overvoltage, overcurrent, overtemperature, etc.), the control unit may turn off the charging module. Therefore, when the first direct current power supply is connected with the alternating current and supplies power to the load, the second direct current power supply can be supplemented with electric energy, and the charging time is not required to be additionally increased, so that the utilization rate of the high-power portable electric equipment is improved.
In another embodiment, as shown in fig. 2, the first dc power source may include an ac input terminal and a rectifying and filtering module. The input end of the rectifying and filtering module is coupled with the alternating current input terminal, and the output end of the rectifying and filtering module is respectively coupled with the control unit and the controllable switch. The first direct current power supply can be connected with alternating current through an alternating current input terminal, such as 110V alternating current, 220V alternating current, 380V alternating current and the like; the rectifying and filtering module can convert the alternating current into direct current. In an embodiment, the ac input terminal may be a power connector. In an embodiment, the rectifying and filtering module may be a rectifying and filtering circuit or an integrated rectifying and filtering device.
In another embodiment, as shown in fig. 3, the first dc power supply may further include a dc converter in addition to the ac input terminal and the rectifying and filtering module, so as to convert the dc power output from the rectifying and filtering module into dc power suitable for the load by means of boosting or reducing. The DC converter may be a DC-DC converter circuit or an integrated DC-DC converter (i.e., direct Current, DC/DC for short), etc. In some embodiments, the dc-dc conversion circuit may be implemented using a full bridge, half bridge, push-pull, buck, boost, or other topologies, for example.
In another embodiment, as shown in fig. 2 and 3, the second dc power source may be a rechargeable battery pack, such as a rechargeable lithium battery pack. In another embodiment, the rechargeable battery pack may be detachable to facilitate replacement and maintenance of the battery pack.
In another embodiment, as shown in connection with fig. 4, the second dc power source may further include a dc converter in addition to the rechargeable battery pack, the dc converter being coupled to the control unit and the rechargeable battery pack, respectively. In this way, the dc converter can convert the dc power output by the rechargeable battery pack into dc power suitable for use by a load by boosting or dropping. The dc converter may be a dc-dc conversion circuit or an integrated dc-dc converter. In some embodiments, the dc-dc conversion circuit may be implemented using a full bridge, half bridge, push-pull, buck, boost, or other topologies, for example.
As shown in fig. 5, in an embodiment, the first dc power supply may further include a first inverter arc welding circuit (i.e., inverter arc welding circuit 1 in fig. 5); the second dc power supply may further include a second inverter arc welding circuit (i.e., inverter arc welding circuit 2 in fig. 5). The input end of the first inversion arc welding circuit is electrically connected with the output end of the rectifying and filtering module, the output end of the first inversion arc welding circuit is electrically connected with the input end of the controllable switch, and the first inversion arc welding circuit is controlled by the control unit. The second inversion arc welding circuit is respectively and electrically connected with the control unit and the rechargeable battery pack.
In some embodiments, the control unit may be implemented by a hardware circuit composed of electronic components and logic elements (or logic circuits), etc.
In another embodiment, in more cases, the control unit may be a processor. In some embodiments, the processor may be, for example, a micro control unit (Microcontroller Unit, i.e., MCU) (e.g., a single chip microcomputer, etc.), a digital signal processor (Digital Signal Processing, abbreviated as DSP), a digital signal control unit (Digital Signal Controller, abbreviated as DSC), a programmable logic device (Programmable Logic Device, abbreviated as PLD), a ARM (Acorn RISC Machine) processor, etc. a programmable integrated circuit module.
In some embodiments, the signal acquisition module may be a voltage sampling module or the like.
In some embodiments, the controllable switch may be, for example, a dc contactor, a dc relay, or other controllable electronic switching device, such as a Metal-Oxide-semiconductor field effect transistor (MOSFET), a bipolar junction transistor (Bipolar Junction Transistor, BJT), a thyristor, an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), or the like. In other embodiments, the controllable switch may be in the form of a single pole double throw or double pole double throw switch, or may be two independent switches, etc.
In an embodiment, when the control unit adopts a processor, the switching state of the controllable switch is controlled according to the sampling signal obtained by the detection end, which may be a voltage signal obtained by the detection end that can be processed according to a preset algorithm, and the switching state of the controllable switch is controlled according to a processing result.
The power control method of the high-power portable electric equipment is described below.
In an embodiment, the processing the voltage signal obtained by the detection end according to the preset algorithm and controlling the switching state of the controllable switch according to the processing result may, as shown in fig. 7, firstly confirm whether the first direct current power supply is connected to the alternating current according to the voltage signal obtained by the detection end; generally, the first dc power supply does not output under the condition that no ac power is connected, and once the ac power is connected, the first dc power supply outputs a voltage signal, so that the voltage signal can be collected by the signal sampling module.
And when the first direct current power supply is confirmed to be connected with alternating current, determining whether the output voltage value of the first direct current power supply is in a preset voltage range or not so as to determine whether the first direct current power supply is suitable for supplying power to a load coupled with the output end of the controllable switch or not.
And when the output voltage value of the first direct current power supply is confirmed to be in the preset voltage range, controlling the controllable switch to work in the first direct current power supply output mode. Wherein, the operation of the controllable switch in the first direct current power output mode means that: when the controllable switch is not in the first direct current power supply output mode currently, controlling the controllable switch to the first direct current power supply output mode; the controllable switch is maintained in the first direct current power output mode when the controllable switch is currently in the first direct current power output mode.
And when the output voltage value of the first direct current power supply is confirmed to be outside the preset voltage range, controlling the controllable switch to work in the second direct current power supply output mode. Wherein, the operation of the controllable switch in the second dc power output mode means: when the controllable switch is not in the second direct current power supply output mode currently, controlling the controllable switch to the second direct current power supply output mode; when the controllable switch is currently in the second direct current power supply output mode, the controllable switch is maintained in the second direct current power supply output mode.
In another embodiment, as shown in fig. 8, when the output voltage value of the first dc power supply is determined to be within the preset voltage range, controlling the controllable switch to operate in the first dc power output mode may include:
and when the output voltage value of the first direct current power supply is confirmed to be in the preset voltage range and the output end of the controllable switch is accessed without load, controlling the controllable switch to work in the first direct current power supply output mode. Thus, the impact damage caused by the electrified switching of the controllable switch can be prevented or the service life of the controllable switch can be shortened.
In another embodiment, as shown in fig. 8, when it is confirmed that the output voltage value of the first dc power supply is within the preset voltage range and the output end of the controllable switch has a load connected thereto, the current state of the controllable switch is maintained (i.e. the controllable switch does not operate). Thus, the device can be used for preventing the damage to the electric equipment caused by sudden power failure.
In another embodiment, the preset voltage range may be a (1±b%), where a is a rated voltage value of the second dc power supply, and b is a preset constant (which may be determined according to actual needs). In an embodiment, the preset voltage range may be, for example, a (1±30%). That is, in this embodiment, the output voltage value of the first dc power supply should be matched with the rated voltage value of the second dc power supply as much as possible. In an embodiment, for example, the output voltage value of the first dc power supply is 310V dc, and the preset voltage range is between 217V and 403V dc, and it is determined that the output voltage value of the first dc power supply is within the preset voltage range.
It should be noted that, the power control method shown in fig. 7 or the power control method shown in fig. 8 may be performed in a loop.
In addition, in some embodiments, the power control method does not execute switching action when the high-power portable electric equipment is working, prevents sudden power failure in the switching process from damaging the high-power portable electric equipment, and can prevent damage caused by electrified disconnection of the controllable switch or shorten the service life. In some embodiments, whether the high-power portable electric equipment is working or not can be judged by collecting the current of the output end of the controllable switch; the output end of the controllable switch is provided with current to pass through, so that the high-power portable electric equipment is indicated to work, otherwise, the high-power portable electric equipment is in a non-working state such as shutdown or standby. In an embodiment, the collection of the current at the output end of the controllable switch may be achieved by connecting a sampling resistor in series with the output end of the controllable switch; in another embodiment, the collection of the current at the output end of the controllable switch may also be achieved by detecting the operating state trigger switch of the high-power portable electric equipment.
Exemplary embodiments of the present application are described below.
As shown in fig. 9, taking an inverter welding machine device as an example, the AC input of the first dc power supply is 220V/AC, the first dc power supply is rectified by the diodes D1, D2, D3 and D4 and then filtered by the capacitors C1 and C2 to obtain 310V dc, and under the condition that the AC input voltage is stable, in order to ensure that the voltages of the first dc power supply and the second dc power supply differ by no more than ±30%, the voltage of the rechargeable battery pack of the second dc power supply should be 310v±30%.
In the embodiment shown in fig. 9, the rechargeable battery pack of the second dc power supply is composed of lithium batteries, and for a single lithium battery with a nominal voltage of 3.6V, the electric quantity cannot be completely discharged in consideration of the storage requirement, and if the discharge voltage range is between 2.7V and 4.2V, the number of optional lithium battery strings is 81 strings to 95 strings. In order to obtain a better effect, the voltage of the lithium batteries after being connected in series is as close to 310V as possible, the number of the lithium battery strings can be set to 86 strings, and the nominal voltage of the formed rechargeable lithium battery pack is 309.6V, so that the power supply requirement is met.
In the embodiment shown in fig. 9, the voltage acquisition 1 acquires the output voltage of the first dc power supply by dividing the voltage by the resistors R1 and R2, and feeds back the output voltage to the control unit, so as to determine whether the first dc power supply is connected to ac power, and whether the output voltage of the first dc power supply is within a normal range (i.e., a preset range). The voltage acquisition 2 acquires the voltage of the rechargeable battery pack in the second direct current power supply through the voltage division of the resistors R3 and R4 and feeds the voltage back to the control unit, and the voltage acquisition 2 is used for detecting whether the voltage of the rechargeable battery pack is in a normal range (namely a preset range) or not so as to prevent the rechargeable battery pack from being overcharged and overdischarged. The current collection 1 is used for collecting the output current of the rechargeable battery pack, and the collected information is fed back to the control unit through the sampling resistor R5 to prevent overcurrent or short circuit when the rechargeable battery pack discharges.
In the embodiment shown in fig. 9, a temperature acquisition module may be further disposed in the rechargeable battery pack, and the temperature acquisition module is configured to obtain temperature information of the rechargeable battery pack by using the control unit, so as to ensure that the rechargeable battery pack is charged and discharged at a normal temperature.
In the embodiment shown in fig. 9, the output of the rechargeable battery pack is further connected in series with the controllable switch 2, the controllable switch 2 is controlled by the control unit, and the controllable switch 2 is closed only when the data detected by the voltage acquisition 2, the current acquisition 1 and the temperature acquisition module are all in a normal range, and if abnormal conditions such as under-voltage, over-voltage, high temperature, over-current and the like occur, the control unit can open the controllable switch 2, so that the safe use of the rechargeable battery pack is ensured.
In the embodiment shown in fig. 9, the output positive electrode of the first dc power supply is connected to the a end of the controllable switch K1, the output positive electrode of the second dc power supply is connected to the B end of the controllable switch K1, and the output negative electrodes of the first dc power supply and the second dc power supply are shorted.
In the embodiment shown in fig. 9, the output of the controllable switch is a dc output, and is connected to an inverter arc welding circuit composed of switching transistors Q1, Q2, Q3, and Q4, a transformer T1, diodes D5 and D6, and a sampling resistor R6. The switching tubes Q1, Q2, Q3 and Q4 and the transformer T1 form a full-bridge inverter circuit, and the output of the transformer T1 is integrated into a direct-current output welding power supply through the diodes D5 and D6. The sampling resistor R6 forms a current sampling 2 and is used for controlling the conduction state of the switching tube according to the detected welding current to obtain the output external characteristics suitable for welding.
In the embodiment shown in fig. 9, when the voltage acquisition 1 detects that the first direct current power supply has alternating current, and the voltage is in the correct range (310 v±30%), the controller controls the controllable switch to be connected to the end a, and the first direct current power supply is used for independently supplying power to the inversion arc welding circuit; when the first direct current power supply is not connected with alternating current or the voltage is abnormal, the controllable switch is connected to the end B, and if the parameters such as the voltage, the current, the temperature and the like of the rechargeable battery pack are normal, the controllable switch 2 is closed, so that the second direct current power supply is used for independently supplying power to the inversion arc welding circuit.
Taking inverter welding equipment as an example, as shown in fig. 10, the alternating current input of the first direct current power supply is set to 220V/AC, and 310V direct current is obtained after rectification and filtering; the rechargeable battery pack in the second direct current power supply is set as a lithium battery pack of 43 strings, and the nominal voltage of the rechargeable battery pack is 154.8V, and the voltage of the rechargeable battery pack is different from the voltage of the first direct current power supply after rectification and filtration by 50% and exceeds 30%. In this exemplary embodiment, the Buck processing is performed on the first dc power supply, and the Buck circuit is formed by using the Buck circuit as an example, and the final output voltage of the first dc power supply can be controlled by controlling the on duty ratio of Q5 by using the PWM modulation method. For example, when Q5 is controlled to operate at a duty cycle of 50%, the final output voltage of the first dc power supply is about 155V, so that an output voltage matched with the second dc power supply is obtained, and then the anodes of the first dc power supply and the second dc power supply are respectively connected to the a terminal and the B terminal of the controllable switch. For further description, reference is made to the exemplary embodiment shown in fig. 9, and further description is omitted herein.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. It should also be noted that the terms "comprising," "including," or any other variation thereof, are intended to cover a non-exclusive inclusion.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (16)
1. A power control device for a high-power portable consumer, comprising:
the first direct current power supply and the second direct current power supply;
the input end of the controllable switch is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply, and the output end of the controllable switch forms the output of the power supply control device;
the control unit is characterized in that a detection end of the control unit is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply through corresponding signal acquisition modules, and a control end of the control unit is coupled with a control end of the controllable switch and is used for processing voltage signals acquired by the detection end according to a preset algorithm and controlling the switching state of the controllable switch according to a processing result;
the step of processing the voltage signal acquired by the detection end according to a preset algorithm and controlling the switching state of the controllable switch according to a processing result comprises the following steps:
confirming whether the first direct current power supply is connected with alternating current or not according to the voltage signal obtained by the detection end;
when the first direct current power supply is confirmed to be connected with alternating current, determining whether an output voltage value of the first direct current power supply is in a preset voltage range;
when the output voltage value of the first direct current power supply is confirmed to be in the preset voltage range, determining whether a load is connected to the output end of the controllable switch currently;
when no load access of the output end of the controllable switch is confirmed, controlling the controllable switch to work in the first direct current power output mode;
and when the load access of the output end of the controllable switch is confirmed, maintaining the current state of the controllable switch.
2. The power control device of the high-power portable electric device according to claim 1, wherein the preset algorithm further comprises:
and when the first direct current power supply is confirmed to be not connected with alternating current, or the output voltage value of the first direct current power supply is confirmed to be outside the preset voltage range, controlling the controllable switch to work in the second direct current power supply output mode.
3. The power control device of the high-power portable electric device according to claim 2, wherein the preset voltage range is a (1±b%), where a is a rated voltage value of the second dc power supply and b is a preset constant.
4. The power control device of the high-power portable electric device according to claim 1, further comprising:
and the charging module is respectively coupled with the first direct current power supply, the second direct current power supply and the control unit and is used for charging the second direct current power supply by using the first direct current power supply under the control of the control unit.
5. The power control device of the high-power portable consumer of claim 1, wherein the second dc power source comprises a rechargeable battery pack.
6. The power control device of the high-power portable consumer of claim 5, wherein the rechargeable battery pack is detachable.
7. The power control device of the high-power portable consumer of claim 1, wherein the first direct current power supply comprises:
an ac input terminal;
and the input end of the rectifying and filtering module is coupled with the alternating current input terminal, and the output end of the rectifying and filtering module is respectively coupled with the control unit and the controllable switch.
8. The power control device of the high-power portable consumer of claim 7, wherein the first dc power source further comprises:
and the rectification filter module is respectively coupled with the control unit and the controllable switch through the direct-current converter.
9. The power control device of the high-power portable consumer of claim 7, wherein the first dc power source further comprises:
and the input end of the first inversion arc welding circuit is coupled with the output end of the rectifying and filtering module, the output end of the first inversion arc welding circuit is coupled with the input end of the controllable switch, and the first inversion arc welding circuit is controlled by the control unit.
10. The power control device of the high-power portable consumer of claim 5 or 6, wherein the second dc power source further comprises:
and a DC converter coupled to the control unit and the rechargeable battery pack, respectively.
11. The power control device of the high-power portable consumer of claim 5 or 6, wherein the second dc power source further comprises:
and a second inverter arc welding circuit coupled to the control unit and the rechargeable battery pack, respectively.
12. The high-power portable electric equipment is characterized by comprising a power supply control device and a load coupled with the output end of the power supply control device; the power supply control device includes:
the first direct current power supply and the second direct current power supply;
the input end of the controllable switch is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply, and the output end of the controllable switch forms the output of the power supply control device;
the control unit is characterized in that a detection end of the control unit is respectively coupled with the output ends of the first direct current power supply and the second direct current power supply through corresponding signal acquisition modules, and a control end of the control unit is coupled with a control end of the controllable switch and is used for processing voltage signals acquired by the detection end according to a preset algorithm and controlling the switching state of the controllable switch according to a processing result;
the step of processing the voltage signal acquired by the detection end according to a preset algorithm and controlling the switching state of the controllable switch according to a processing result comprises the following steps:
confirming whether the first direct current power supply is connected with alternating current or not according to the voltage signal obtained by the detection end;
when the first direct current power supply is confirmed to be connected with alternating current, determining whether an output voltage value of the first direct current power supply is in a preset voltage range;
when the output voltage value of the first direct current power supply is confirmed to be in the preset voltage range, determining whether a load is connected to the output end of the controllable switch currently;
when no load access of the output end of the controllable switch is confirmed, controlling the controllable switch to work in the first direct current power output mode;
and when the load access of the output end of the controllable switch is confirmed, maintaining the current state of the controllable switch.
13. The high power portable powered device of claim 12, wherein the high power portable powered device is a portable electric welding machine or a portable cutting machine.
14. The power supply control method of the high-power portable electric equipment is characterized by comprising the following steps of:
acquiring a voltage signal of a first direct current power supply and a second direct current power supply;
processing the voltage signal according to a preset algorithm, and controlling the switching state of the controllable switch according to a processing result;
the step of processing the voltage signal according to a preset algorithm and controlling the switching state of the controllable switch according to a processing result comprises the following steps:
confirming whether the first direct current power supply is connected with alternating current or not according to the voltage signal;
when the first direct current power supply is confirmed to be connected with alternating current, determining whether an output voltage value of the first direct current power supply is in a preset voltage range;
when the output voltage value of the first direct current power supply is confirmed to be in the preset voltage range, determining whether a load is connected to the output end of the controllable switch currently;
when no load access of the output end of the controllable switch is confirmed, controlling the controllable switch to work in the first direct current power output mode;
and when the load access of the output end of the controllable switch is confirmed, maintaining the current state of the controllable switch.
15. The method for controlling a power supply of a high-power portable electric device according to claim 14, wherein the preset algorithm further comprises:
and when the first direct current power supply is confirmed to be not connected with alternating current, or the output voltage value of the first direct current power supply is confirmed to be outside the preset voltage range, controlling the controllable switch to work in the second direct current power supply output mode.
16. The method for controlling a power supply of a high-power portable electric device according to claim 14, wherein the preset voltage range is a (1±b%), a being a rated voltage value of the second dc power supply, and b being a preset constant.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711143887.XA CN108075562B (en) | 2017-11-17 | 2017-11-17 | High-power portable electric equipment and power supply control device and method thereof |
| PCT/CN2018/112653 WO2019095995A1 (en) | 2017-11-17 | 2018-10-30 | High-power portable electrical equipment and power supply controlling apparatus and method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711143887.XA CN108075562B (en) | 2017-11-17 | 2017-11-17 | High-power portable electric equipment and power supply control device and method thereof |
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| CN108075562A CN108075562A (en) | 2018-05-25 |
| CN108075562B true CN108075562B (en) | 2023-11-10 |
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| CN108075562B (en) * | 2017-11-17 | 2023-11-10 | 苏州绿恺动力电子科技有限公司 | High-power portable electric equipment and power supply control device and method thereof |
| CN108847805A (en) * | 2018-06-27 | 2018-11-20 | 佛山市诺行科技有限公司 | A kind of battery switching driving device of bicycle position parking apparatus |
| CN111726041A (en) * | 2019-03-21 | 2020-09-29 | 深圳拓邦股份有限公司 | Series excited motor control circuit and stirring device |
| CN111355425A (en) * | 2020-04-16 | 2020-06-30 | 广东美的制冷设备有限公司 | Drive control circuit, drive method and device, compressor and air conditioning equipment |
| CN111355418B (en) * | 2020-04-16 | 2022-05-31 | 美的集团武汉制冷设备有限公司 | Drive control circuit, drive control method, circuit board and air conditioner |
| CN111355421B (en) * | 2020-04-16 | 2022-02-18 | 广东美的制冷设备有限公司 | Drive control circuit, drive control method, circuit board and air conditioner |
| CN111355420B (en) * | 2020-04-16 | 2022-03-29 | 广东美的制冷设备有限公司 | Motor drive control circuit, motor drive method, circuit board and air conditioner |
| CN112448461A (en) * | 2020-11-13 | 2021-03-05 | 成都天进仪器有限公司 | Waveform generator equipment for time-sharing power supply of large-signal power supply and small-signal power supply |
| CN113765064A (en) * | 2021-09-28 | 2021-12-07 | 中汽创智科技有限公司 | Open-phase protection circuit and vehicle |
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| WO2019095995A1 (en) | 2019-05-23 |
| CN108075562A (en) | 2018-05-25 |
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