CN114243949B - Explosion-proof wireless charging system and method - Google Patents
Explosion-proof wireless charging system and method Download PDFInfo
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- CN114243949B CN114243949B CN202111562053.9A CN202111562053A CN114243949B CN 114243949 B CN114243949 B CN 114243949B CN 202111562053 A CN202111562053 A CN 202111562053A CN 114243949 B CN114243949 B CN 114243949B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 186
- 238000004891 communication Methods 0.000 claims description 41
- 238000012544 monitoring process Methods 0.000 claims description 8
- 239000002360 explosive Substances 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002184 metal Substances 0.000 description 16
- 239000003245 coal Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 11
- 239000000428 dust Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000005672 electromagnetic field Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010892 electric spark Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application relates to an explosion-proof wireless charging system and method, this wireless charging system includes wireless connection's charging transmitting terminal and charging receiving terminal, still includes: the liquid storage container is provided with an opening at the top, the charging transmitting end is arranged inside the liquid storage container, the charging receiving end is movably hoisted at the top of the liquid storage container, and the output end of the charging receiving end is electrically connected with electric equipment; at least one of the liquid storage container, the charging receiving end and the electric equipment is arranged to be liftable, so that the charging receiving end can be submerged below the liquid level and is electromagnetically coupled with the charging transmitting end. Through this application, provide a safe operational environment of wireless charging device, isolated inflammable and explosive environment to can effectively realize the radiating effect.
Description
Technical Field
The application relates to the field of wireless charging, in particular to an explosion-proof wireless charging system and method based on a wireless power transmission technology.
Background
Coal is an important energy source in China, however, the coal mine safety problem always restricts the development of the coal industry in China. It is known that flammable and explosive gases, liquids and dust in coal mines can burn violently and explode at a certain temperature or ignition energy when mixed with air (oxidant) to a certain concentration. The problem of wireless charging of electrical equipment in an underground explosion environment is mainly caused by ignition of an explosion mixture by the underground electrical equipment, and the reasons of the problem are mainly as follows: firstly, sparks and arcs generated by electrical equipment; and secondly, the surface of the electrical equipment (namely the surface contacted by the explosive mixture) generates heat. Therefore, in an explosion-hazard area, all the electricity should use explosion-proof appliances. In particular, in the air under the coal mine, under the condition that the gas and coal dust content reaches a certain concentration, if the generated electric spark, electric arc or local thermal effect reaches ignition energy, the generated electric spark, electric arc or local thermal effect can burn or explode, which is extremely dangerous and unfavorable under the coal mine, so that the explosion-proof performance of the electric equipment under the coal mine is more strict.
The wireless power transmission technology is a non-contact charging technology for power transmission through space electromagnetic field coupling, so that the electric equipment is thoroughly free from the constraint of a wired cable, and the maintenance and the management of the equipment are greatly facilitated. The wireless power transmission technology based on magnetic coupling resonance has the characteristics of larger transmission distance, high transmission efficiency, lower electromagnetic radiation, penetrability, non-contact property, no wire connection, no arcing striking phenomenon and the like, and the safety is greatly improved.
Although the wireless power transmission technology does not have exposed electrodes, an electromagnetic field still exists in the working process, and the possibility of explosion of flammable and explosive gas in the electromagnetic field still exists, or the possibility of secondary risks caused by entering metal foreign matters and metal dust, namely, the metal generates eddy current heating in the electromagnetic field, so that the gas is ignited. At present, aiming at applying the wireless power transmission technology to dangerous flammable and explosive gas or dust environments such as coal mines and the like, the problem of charging electrical equipment is solved, and an effective and thorough safety solution is not provided.
Disclosure of Invention
The embodiment of the application provides an explosion-proof wireless charging system and method based on a wireless power transmission technology, so as to meet the requirement of safe charging under a coal mine, and the technical guarantee level of safe production of the coal mine is obviously improved.
In a first aspect, an embodiment of the present application provides an explosion-proof wireless charging system, including wireless connection's charging transmitting end and charging receiving end, specifically still include:
the liquid storage container is provided with an opening at the top, the charging transmitting end is arranged inside the liquid storage container, the charging receiving end is movably hoisted at the top of the liquid storage container, and the output end of the charging receiving end is electrically connected with electric equipment; specifically, the charging receiving end is fixedly and electrically connected with the electric equipment through a supporting rod, and the electric equipment is a mobile robot or other underground mobile electric equipment for coal mines.
At least one of the liquid storage container, the charging receiving end and the electric equipment is arranged to be liftable, so that the charging receiving end can be submerged below the liquid level and is electromagnetically coupled with the charging transmitting end.
In some of these embodiments, the system further comprises:
the sensor controller is in communication connection with the charging transmitting end; specifically, the sensor controller is connected with the charging transmitting end through a communication cable to realize serial communication.
The liquid level sensor is fixedly arranged in the liquid storage container and is electrically connected with the sensor controller, and the liquid level sensor monitors the liquid level in the liquid storage container and sends a liquid level signal to the sensor controller;
the temperature sensor is fixedly arranged in the liquid storage container and is electrically connected with the sensor controller, and the temperature sensor monitors the temperature in the liquid storage container and sends a temperature signal to the sensor controller;
the sensor controller receives the liquid level signal and the temperature signal, compares the liquid level signal with a preset safe liquid level and a preset temperature range, outputs a standard signal or a non-standard signal to the charging transmitting end, and the charging transmitting end judges to start or stop wireless charging according to the standard signal or the non-standard signal so as to ensure that the liquid level and the temperature in the liquid storage container meet preset conditions. And if the liquid level in the liquid storage container does not reach the preset safe liquid level or the liquid temperature is too high, alarming, so as to remind a worker to check abnormal conditions or supplement liquid.
In some of these embodiments, the system further comprises:
the explosion-proof box is arranged at the lower part, inside or integrated at the charging transmitting end of the liquid storage container, and the sensor controller is arranged inside the explosion-proof box.
In some of these embodiments, the system further comprises:
the lifting device is fixedly arranged at the bottom of the liquid storage container and used for controlling the liquid storage container to synchronously ascend or descend.
In some of these embodiments, the system further comprises:
the lifting device is fixedly arranged on the electric equipment and used for controlling the electric equipment and the charging receiving end to ascend or descend.
In some embodiments, the charging transmitting terminal further includes:
the transmitting end power converter is electrically connected with a power supply, and is used for receiving the input of the power supply and converting the input into high-frequency alternating current output; specifically, the power supply is a power supply grid or a switching power supply which is arranged in the explosion-proof box and is electrically connected with the charging transmitting end. Optionally, the charging transmitting end is connected with the power supply through an explosion-proof hose and a power cable;
a transmitting end coil electrically connected with the transmitting end power converter and electromagnetically coupled with a receiving end coil of the charging receiving end;
the transmitting end controller is electrically connected with the transmitting end power converter and is in communication connection with the sensor controller;
the transmitting end communication module is electrically connected with the transmitting end controller and is not connected with the receiving end communication module of the charging receiving end.
In some of these embodiments, the charging receiver further includes:
the receiving end coil is electromagnetically coupled with the transmitting end coil and is used for picking up high-frequency alternating current of the transmitting end coil through magnetic field coupling;
the receiving end power converter is electrically connected with the receiving end coil and the electric equipment, and is used for receiving the high-frequency alternating current and converting the high-frequency alternating current into direct current to be supplied to the electric equipment;
the receiving end controller is electrically connected with the receiving end power converter to control the receiving end power converter to receive the high-frequency alternating current and then convert the high-frequency alternating current into direct current required by electric equipment;
and the receiving end communication module is electrically connected with the receiving end controller and is not connected with the transmitting end communication module.
In some of these embodiments, the transmitting end communication module and the receiving end communication module communicate wirelessly based on, but not limited to, RF communication (Radio Frequency Communication), carrier communication, optical communication, or underwater acoustic communication.
In some embodiments, the charging transmitting end and the charging receiving end adopt explosion-proof structures.
In some embodiments, the liquid level sensor and the temperature sensor are waterproof and explosion-proof sensors.
In some embodiments, explosion-proof pipes are arranged outside the connecting cables between the charging transmitting end and the power supply, between the liquid level sensor and the temperature sensor and between the charging transmitting end and the sensor controller, so that the charging transmitting end is suitable for explosive gas or dust environments.
In a second aspect, an embodiment of the present application provides an explosion-proof wireless charging method, using an explosion-proof wireless charging system as described above, the method including:
a standard signal obtaining step, namely receiving the temperature signal and the liquid level signal through the sensor controller, and outputting a standard signal or a non-standard signal to the transmitting end controller according to the temperature signal and/or the liquid level signal;
a charging signal acquisition step, wherein the transmitting end controller receives a charging starting signal or a charging stopping signal sent by the charging receiving end or a background server;
and in the wireless charging step, the transmitting end controller controls the charging transmitting end to start or stop wireless charging according to the standard reaching signal, the non-standard reaching signal, the starting charging signal and/or the stopping charging signal.
In some embodiments, the step of obtaining the compliance signal further comprises:
a temperature monitoring signal judging step of receiving the temperature signal through the sensor controller, comparing the temperature signal with a set temperature range, and judging whether the set temperature range is satisfied;
a liquid level monitoring signal judging step, namely receiving the liquid level signal through the sensor controller, comparing the liquid level signal with a preset safe liquid level, and judging whether the liquid level reaches the preset safe liquid level or not;
a standard reaching signal sending step, wherein if the temperature signal meets the set temperature range and the liquid level signal reaches the preset safe liquid level, the sensor controller outputs the standard reaching signal to the transmitting end controller;
and a step of sending a non-standard signal, wherein if the temperature signal does not meet the set temperature range or the liquid level signal does not reach the preset safe liquid level, the sensor controller outputs the non-standard signal to the transmitting end controller.
In some of these embodiments, the wireless charging step further comprises:
a wireless charging starting step, wherein if the transmitting end controller receives the standard reaching signal and the charging starting signal, the charging transmitting end is controlled to start wireless charging;
and a wireless charging closing step, wherein if the transmitting end controller receives the signal which does not reach the standard or the charging stopping signal, the charging transmitting end is controlled to stop wireless charging.
Compared with the related art, the explosion-proof wireless charging device provided by the embodiment of the application works by placing the wireless charging system in an explosion-proof nonflammable liquid environment, so that sparks and electric arcs possibly generated in normal work or accident states are separated from explosive gas or dust in surrounding environments, the inflammable and explosive environments are isolated, in addition, the explosion-proof nonflammable liquid is used as a heat dissipation medium, and heat generated by the explosion-proof wireless charging device during charging can be dispersed through liquid. The safety of liquid level and temperature in the liquid storage container is monitored through the liquid level sensor and the temperature sensor, and the safety charging requirement under flammable and explosive environments is met.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the other features, objects, and advantages of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 is a schematic diagram of an explosion-proof wireless charging system according to an embodiment of the present application;
fig. 2 is a block diagram of an explosion-proof wireless charging system according to an embodiment of the present application;
FIG. 3 is a flow chart of an explosion-proof wireless charging method according to an embodiment of the present application;
fig. 4 is a flow chart of an explosion-proof wireless charging method according to a preferred embodiment of the present application.
Wherein:
1. a liquid storage container; 2. a charging transmitting terminal; 3. a charging receiving end; 4. an electric device; 5. a support rod; 6. an explosion-proof box;
7. a power supply; 8. a sensor controller; 9. a liquid level sensor; 10. a temperature sensor;
11. a lifting device; 21. a transmitting-side power converter; 22. a transmitting end coil;
23. a transmitting end controller; 24. a transmitting end communication module; 31. a receiving end coil;
32. a receiving-side power converter; 33. a receiving end controller; 34. and the receiving end communication module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described and illustrated below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments provided herein, are intended to be within the scope of the present application.
It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is possible for those of ordinary skill in the art to apply the present application to other similar situations according to these drawings without inventive effort. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by those of ordinary skill in the art that the embodiments described herein can be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar terms herein do not denote a limitation of quantity, but rather denote the singular or plural. The terms "comprising," "including," "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein refers to two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., "a and/or B" may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The terms "first," "second," "third," and the like, as used herein, are merely distinguishing between similar objects and not representing a particular ordering of objects.
The terms "center," "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
The foreign matter detection (Foreigner Object Detect, FOD) refers to the detection heating condition of the metal foreign matter entering in the wireless charging process, because the metal foreign matter is placed in the electromagnetic field emission area, and because the electromagnetic field can generate eddy current in the metal foreign matter, the metal foreign matter is heated, so that the gas is ignited to generate secondary hazard.
Based on the above, in order to ensure the safety of the electrical equipment for mine, realize safe charging under the coal mine, and prevent the shell of the electrical equipment from losing explosion-proof performance or explosion-proof performance (also referred to as explosion loss), the embodiment of the application proposes an explosion-proof wireless charging device, which comprises a charging transmitting end 2 and a charging receiving end 3 which are in wireless connection, and further comprises a liquid storage container 1, an explosion-proof box 6, a power supply 7 and other structures, and specifically, fig. 1 is a schematic structural diagram of the explosion-proof wireless charging device according to the embodiment of the application, and the specific structure of the device is described by referring to fig. 1:
the liquid storage container 1, the liquid storage container 1 is of a box structure, the top of the liquid storage container 1 is provided with an opening, the charging transmitting end 2 is arranged inside the liquid storage container 1, the charging receiving end 3 is movably hoisted at the top of the liquid storage container 1, and the output end of the charging receiving end 3 is electrically connected with the electric equipment 4; specifically, as shown in fig. 1, the charging receiving end 3 is fixedly and electrically connected with the electric equipment 4 through a supporting rod 5, the supporting rod 5 is hollow so as to be convenient for placing cables, and the electric equipment 4 is a mobile robot or other underground mobile electric equipment for coal mines. At least one of the liquid storage container 1, the charging receiving end 3 and the electric equipment 4 is arranged to be liftable, so that the charging receiving end 3 can be submerged below the liquid level and is electromagnetically coupled with the charging transmitting end 2, wherein the charging transmitting end 2 and the charging receiving end 3 both adopt explosion-proof structures, and therefore the situation that the charging transmitting end 2 and the charging receiving end 3 are in short-time contact with explosive mixtures is avoided, and the charging transmitting end 2 and the charging receiving end 3 cannot ignite the surrounding explosive mixtures under normal operation or approved overload and fault conditions. Optionally, the liquid in the liquid storage container 1 of the embodiment of the present application may be water or other liquid that has non-flammable and explosive mine safety characteristics and does not affect the charging process, such as hydraulic oil, and on this basis, the replacement of water with other liquid that meets mine safety requirements and does not affect the charging process all belongs to the protection scope of the embodiment of the present application. In view of the isolation and heat dissipation of liquids such as water, this embodiment uses such liquids to isolate electrical equipment from surfaces in contact with explosive mixtures. The wireless power transmission technology can heat metal substances between the coupling surfaces during operation, explosive gas or dust in a coal mine can be discharged due to the existence of water, the metal foreign matters cannot be in direct contact with the explosive gas or the dust if the metal foreign matters exist, meanwhile, the water can disperse heat, the temperature cannot be too high, the possibility that the metal foreign matters ignite the gas is avoided, and secondary hazards caused by the metal foreign matters which are charged in a wireless mode can be isolated.
The explosion-proof box 6 is arranged at the lower part or inside the liquid storage container 1; a power supply 7 is arranged in the explosion-proof box 6, and the power supply 7 is electrically connected with the charging transmitting end 2; specifically, the charging transmitting end 2 is connected with the power supply 7 through an explosion-proof hose and a power cable; a sensor controller 8 is also arranged in the explosion-proof box 6, and the sensor controller 8 is in communication connection with the charging transmitting end 2; specifically, the sensor controller 8 is connected with the charging transmitting end 2 through a communication cable to realize serial communication. It should be noted that, the power supply 7 in this embodiment is configured as a switching power supply, but the power supply 7 in this embodiment may also be configured as a power supply grid, and is directly electrically connected to the charging transmitting terminal 2; to further simplify the structure, the explosion-proof box 6 may be integrated inside the charging transmitting terminal 2.
The liquid storage container 1 is also fixedly provided with a liquid level sensor 9 and a temperature sensor 10. The liquid level sensor 9 is disposed in the liquid storage container 1 and electrically connected to the sensor controller 8, the temperature sensor 10 is disposed in the liquid storage container 1 and electrically connected to the sensor controller 8, and the temperature sensor 10 monitors the temperature in the liquid storage container 1 and sends a temperature signal to the sensor controller 8.
The liquid level sensor 9 is used for monitoring the liquid level in the liquid storage container 1 and sending a liquid level signal to the sensor controller 8, the temperature sensor 10 is used for monitoring the temperature in the liquid storage container 1 and sending a temperature signal to the sensor controller 8, the sensor controller 8 receives the liquid level signal and the temperature signal and outputs a standard reaching signal or a non-standard reaching signal to the charging transmitting end 2 after comparing the liquid level signal and the temperature signal with a preset safe liquid level and a set temperature range, and the charging transmitting end 2 judges to start or stop wireless charging according to the standard reaching signal or the non-standard reaching signal so as to ensure that the liquid level and the temperature in the liquid storage container 1 meet preset conditions. If the liquid level in the liquid storage container 1 does not reach the preset safe liquid level or the temperature in the liquid is too high, an alarm is given, so that a worker is reminded to check abnormal conditions or supplement the liquid. Optionally, the preset safe liquid level is set to satisfy that the charging transmitting end 2 and the charging receiving end 3 are both completely immersed in the liquid, and the set temperature range can be adaptively adjusted according to the actual working environment requirement. Further, the set temperature range is the highest temperature rise during normal operation of the apparatus obtained through the test, if the collected temperature signal is higher than the set temperature range, it is determined that abnormal temperature rise due to the introduction of metallic foreign matters or the like should be stopped, and if the liquid medium is water, for example, without limitation, the set temperature range should be lower than 100 ℃.
Specifically, if the liquid level in the liquid storage container 1 does not reach the preset safe liquid level or the temperature does not meet any condition in the set temperature range, the sensor controller 8 sends a signal which does not reach the standard to the charging transmitting end 2, and the explosion-proof wireless charging device prohibits starting charging work; if the liquid level in the liquid storage container 1 reaches the preset safe liquid level and the temperature meets the set temperature range, the sensor controller 8 sends a standard signal to the charging transmitting end 2, and the charging operation is allowed to be started normally. Specifically, the liquid level sensor 9 and the temperature sensor 10 are connected to the sensor controller 8 through an explosion-proof hose and a signal line. Alternatively, both the liquid level sensor 9 and the temperature sensor 10 are waterproof and explosion-proof sensors.
The bottom of the liquid storage container 1 is fixedly provided with a lifting device 11, so that the liquid storage container 1 is controlled to synchronously ascend or descend by the lifting device 11. Alternatively, the lifting device 11 is configured as an electric screw lifting device, an electric hydraulic scissor lifting device or other mechanical equipment capable of realizing electric lifting. Based on this, when the explosion-proof wireless charging system in the embodiment of the application charges, the liquid storage container 1 is lifted by the lifting device 11, and the charging receiving end 3 is immersed in the liquid storage container 1 and sends a charging start signal to the charging transmitting end 2 after the immersed liquid is aligned with the charging transmitting end 2, so as to start the charging transmitting end 2 to perform wireless charging; when the charging is completed, the charging receiving end 3 sends a charging stopping signal to the charging transmitting end so as to stop wireless charging, and the lifting device 11 controls the liquid storage container 1 to descend.
The safety of the working environment of the explosion-proof wireless charging system is further ensured based on the liquid level sensor 9 and the temperature sensor 10. In addition, based on the temperature sensor 10, when the metal foreign matters in the liquid storage container 1 are dropped into, the embodiment of the application can effectively reduce the secondary hazard caused by the metal foreign matters and reduce the influence of the heating of the metal foreign matters on the wireless charging process; specifically, when the metal foreign matter heats seriously, the temperature sensor 10 can detect the heating condition in the liquid storage container 1, for example, but not limited to, if the temperature exceeds 80 ℃, the explosion-proof wireless charging and charging transmitting end 2 is controlled to stop working in real time, so that the heating source is closed, and the safety charging requirement under the flammable and explosive environment is met.
Based on the above-mentioned structure, this application embodiment places wireless charging system and works under explosion-proof incombustible liquid environment to separate spark, electric arc and the explosive gas or the dust in the surrounding environment that probably produce under normal work or the accident condition, isolated inflammable and explosive environment, in addition, utilize explosion-proof incombustible liquid as heat dissipation medium, can be with the heat that explosion-proof wireless charging system produced when charging through liquid escape.
Fig. 2 is a block diagram of an explosion-proof wireless charging system according to an embodiment of the present application. As shown in fig. 2, the charging transmitting terminal 2 specifically includes: the transmitting end power converter 21 is electrically connected with the power supply 7, and the transmitting end power converter 21 is used for receiving the input of the power supply 7 and converting the input into high-frequency alternating current output; a transmitting end coil 22 electrically connected to the transmitting end power converter 21 and electromagnetically coupled to the receiving end coil 31 of the charging receiving end 3; a transmitting end controller 23 electrically connected with the transmitting end power converter 21 and the communication connection sensor controller 8; the transmitting end communication module 24 is electrically connected to the transmitting end controller 23 and is wirelessly connected to the receiving end communication module 34 of the receiving end of the charging receiving end 3. The charging receiving terminal 3 specifically includes: a receiving end coil 31, which is electromagnetically coupled to the transmitting end coil 22, the receiving end coil 31 being configured to pick up the high-frequency ac power of the transmitting end coil 22 by magnetic field coupling; the receiving end power converter 32 is electrically connected with the receiving end coil 31 and the electric equipment 4, and the receiving end power converter 32 is used for receiving high-frequency alternating current and converting the high-frequency alternating current into direct current to be supplied to the electric equipment 4; a receiving end controller 33, electrically connected to the receiving end power converter 32 to control the receiving end power converter 32 to receive the high-frequency ac power and then convert the ac power into the dc power required by the electric device 4; the receiving-end communication module 34 is electrically connected to the receiving-end controller and is not connected to the transmitting-end communication module 24 of the transmitting end. Alternatively, the transmitting-side communication module 24 and the receiving-side communication module 34 are configured to wirelessly communicate based on, but not limited to, RF communication, carrier communication, optical communication, underwater acoustic communication, and the like.
Based on the above structure, the charging transmitting terminal 2 in the embodiment of the present application converts the input of the power supply 7 into high-frequency alternating current through the transmitting terminal power converter 21 and then excites the transmitting terminal coil 22 to perform wireless charging; the receiving end coil 31 picks up energy through magnetic field coupling and then converts high-frequency alternating current into direct current through the receiving end power converter 32 to supply the direct current to the electric equipment 4; the transmitting end controller 23 generates a control signal to control the power transmission of the transmitting end power converter 21 and performs information interaction with the sensor controller 8 via serial communication, and correspondingly, the receiving end controller 33 generates another control signal to control the power converter 32. The charging receiving end 3 performs signal transmission with the charging transmitting end 2 through the receiving end communication module 34 and the transmitting end communication module 24 so as to complete information interaction and control signal interaction between the charging transmitting end 2 and the charging receiving end 3, such as starting a charging signal and stopping a charging signal, thereby ensuring the safety and stability of the charging work, and the above-mentioned substandard signal, standard signal, starting a charging signal and stopping a charging signal are specifically received and processed by the transmitting end controller 23.
In some embodiments, the lifting device 11 of the present application may also be fixedly disposed on the electric device 4, where the lifting device 11 is used to control the electric device 4 and the charging receiving end 3 to rise or fall. Alternatively, the lifting device 11 may be an electric lifting device based on a screw or hydraulic principle between the electric device 4 and the lifting device thereof, or may be a linear actuator between the electric device 4 and the lifting device thereof, and the like, which is not limited herein. Based on this, when the explosion-proof wireless charging system in the embodiment of the application charges, the electric equipment 4 and the charging receiving end 3 are controlled by the lifting device 11 to descend until the charging receiving end 3 is immersed in the liquid storage container 1 and the immersed liquid is aligned with the charging transmitting end 2, so as to perform wireless charging; and when the charging is completed, the other way around.
In addition, based on the embodiment of the application, the supporting rod 5 is set to be of a telescopic structure, so that the same technical effect can be achieved by realizing the lifting control of the charging receiving end 3, and the deformation also belongs to the protection scope of the application.
In some of these embodiments, the connection between the charging transmitting terminal 2 and the power supply 7, the liquid level sensor 9 and the temperature sensor 10 and the sensor controller 8 are all provided with explosion-proof pipes outside, so as to be suitable for explosive gas or dust environments.
Based on the explosion-proof wireless charging system of the embodiment, the embodiment also provides an explosion-proof wireless charging method. Fig. 3 is a flowchart of an explosion-proof wireless charging method according to an embodiment of the present application, as shown in fig. 3, the flowchart includes the steps of:
a standard signal obtaining step S1, in which a temperature signal and a liquid level signal are received by the sensor controller 8, and a standard signal or a non-standard signal is output to the transmitting end controller 23 according to the temperature signal and/or the liquid level signal;
a charging signal obtaining step S2, in which the transmitting end controller 23 receives a charging start signal or a charging stop signal sent by the charging receiving end 3; furthermore, the charging starting signal or the charging stopping signal can also be sent by a background server in communication connection, so that the remote intelligent control of the system is realized.
In the wireless charging step S3, the transmitting end controller 23 controls the charging transmitting end 2 to start or stop wireless charging according to the up-to-standard signal, the down-to-standard signal, the start charging signal and/or the stop charging signal.
It should be noted that, under normal conditions, the charging transmitting end 2 of the explosion-proof wireless charging system in the embodiment of the application is in a standby state, waits for a working instruction, and the temperature sensor 10 and the liquid level sensor 9 monitor the temperature and the liquid level in the liquid storage container 1 in real time.
Through the steps, the sensor controller 8 of the embodiment of the application judges whether the temperature and the liquid level in the liquid storage container 1 meet the safety working environment of the wireless charging system or not according to the preset safety liquid level and the set temperature range through the temperature signal and the liquid level signal, so that the wireless charging is started or stopped, and the safety of the working environment is ensured.
In some embodiments, the step S1 of obtaining the standard reaching signal further includes:
a temperature monitoring signal judging step S101 of receiving a temperature signal through the sensor controller 8, comparing the temperature signal with a set temperature range, and judging whether the set temperature range is satisfied; further, the set temperature range is the highest temperature rise during normal operation of the apparatus obtained through the test, if the collected temperature signal is higher than the set temperature range, it is determined that abnormal temperature rise due to the introduction of metallic foreign matters or the like should be stopped, and if the liquid medium is water, for example, without limitation, the set temperature range should be lower than 100 ℃.
Step S102 of judging the liquid level monitoring signal, which is to receive the liquid level signal through the sensor controller 8, compare the liquid level signal with a preset safe liquid level and judge whether the liquid level reaches the preset safe liquid level;
a standard signal sending step S103, in which if the temperature signal meets the set temperature range and the liquid level signal reaches the preset safe liquid level, the sensor controller 8 outputs the standard signal to the transmitting end controller 23;
and a step S104 of sending a signal of not reaching the standard, wherein if the temperature signal does not meet the set temperature range or the liquid level signal does not reach the preset safe liquid level, the sensor controller 8 outputs the signal of not reaching the standard to the transmitting end controller 23.
In some of these embodiments, the wireless charging step S3 further includes:
a wireless charging starting step S301, in which if the transmitting end controller 23 receives the standard reaching signal and the charging starting signal, the charging transmitting end 2 is controlled to start wireless charging;
in the wireless charging closing step S302, if the transmitting end controller 23 receives the signal of not reaching the standard and/or the charging stop signal, the charging transmitting end 2 is controlled to stop wireless charging.
Through the above steps, if the temperature and the liquid level in the liquid storage container 1 do not meet the set temperature range and the preset safe liquid level, the transmitting end controller 23 in the embodiment of the present application will not start wireless charging even if receiving the charging starting signal of the charging receiving end 3; when the temperature and the temperature in the liquid storage container 1 meet the preset conditions, and the transmitting end controller 23 receives the charging start signal, the charging transmitting end 2 starts wireless charging.
The embodiments of the present application are described and illustrated below by means of preferred embodiments.
Fig. 4 is a flow chart of an explosion-proof wireless charging method according to a preferred embodiment of the present application. As shown in fig. 4, the explosion-proof wireless charging method includes the steps of:
step S401: the charging transmitting terminal 2 is in a standby state and waits for a working instruction.
Step S402: the temperature sensor 10 and the liquid level sensor 9 continuously monitor the temperature and the liquid level in the liquid storage container 1, and transmit temperature signals and liquid level signals to the sensor controller 8, and the sensor controller 8 judges whether the explosion-proof wireless charging system can start working or not based on a set temperature range and a preset safe liquid level according to the temperature signals and/or the liquid level signals;
if the temperature or the liquid level does not meet the preset condition, the sensor controller 8 sends a signal not reaching the standard to the transmitting end controller 23, the transmitting end controller 23 does not start the operation even if receiving the charging start signal sent by the charging receiving end 3, and sends an alarm signal to remind the staff to check the fault or recover the liquid level, and the step S401 is returned.
Step S403: if the temperature and the liquid level meet the preset conditions, the sensor controller 8 sends a standard signal to the transmitting end controller 23, and the transmitting end controller 23 further judges whether to receive a charging starting signal from the charging receiving end 3, specifically, the charging receiving end 3 and the charging transmitting end 2 are aligned and then send out a charging starting signal;
step S404: if the transmitting end controller 23 receives the start charging signal, wireless charging is started, and the charging transmitting end 2 and the charging receiving end 3 enter a normal wireless charging state, otherwise, the step S401 is returned;
step S405: the transmitting end controller 23 determines whether a charging stop signal is received, and if the charging stop signal is received, it controls the charging transmitting end 2 to stop wireless charging, and returns to step S401, otherwise, charging is continued.
Step S406: in the working process of the explosion-proof wireless charging system, the temperature sensor 10 and the liquid level sensor 9 continuously monitor the state in the liquid storage container 1, and once the conditions of overhigh temperature or unqualified liquid level occur, the sensor controller 8 sends state information to the transmitting end controller 23 in real time, and the transmitting end controller 23 immediately stops wireless charging.
The steps shown in the above-described flow or flow diagrams of the figures may be performed in a controller module, such as a set of computer-executable instructions, and, although a logical order is illustrated in the flow diagrams, in some cases, the steps shown or described may be performed in an order other than that illustrated herein.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. An explosion-proof wireless charging system, includes wireless connection's charging transmitting terminal and charging receiving terminal, its characterized in that still includes:
the liquid storage container is provided with an opening at the top, the charging transmitting end is arranged inside the liquid storage container, the charging receiving end is movably hoisted at the top of the liquid storage container, and the output end of the charging receiving end is electrically connected with electric equipment;
the sensor controller is in communication connection with the charging transmitting end and is electrically connected with a liquid level sensor and a temperature sensor so as to receive a liquid level signal of the liquid level sensor and a temperature signal of the temperature sensor;
the liquid storage container, the charging receiving end and at least one of the electric equipment are arranged to be liftable, so that the charging receiving end is submerged below the liquid level and is electromagnetically coupled with the charging transmitting end, the sensor controller receives the liquid level signal and the temperature signal and compares the liquid level signal with a preset safe liquid level and a set temperature range, a standard signal or a standard-unqualified signal is output to the charging transmitting end, and the charging transmitting end judges to start or stop wireless charging according to the standard signal or the standard-unqualified signal.
2. The explosion-proof wireless charging system according to claim 1, further comprising:
the liquid level sensor is fixedly arranged in the liquid storage container and is electrically connected with the sensor controller, and the liquid level sensor monitors the liquid level in the liquid storage container and sends a liquid level signal to the sensor controller;
the temperature sensor is fixedly arranged in the liquid storage container and is electrically connected with the sensor controller, and the temperature sensor monitors the temperature in the liquid storage container and sends a temperature signal to the sensor controller.
3. The explosion-proof wireless charging system according to claim 2, further comprising:
the explosion-proof box is arranged at the lower part, inside or integrated at the charging transmitting end of the liquid storage container, and the sensor controller is arranged inside the explosion-proof box.
4. The explosion-proof wireless charging system according to any one of claims 1-3, further comprising:
the lifting device is fixedly arranged at the bottom of the liquid storage container and used for controlling the liquid storage container to synchronously ascend or descend.
5. The explosion-proof wireless charging system according to any one of claims 1-3, further comprising:
the lifting device is fixedly arranged on the electric equipment and used for controlling the electric equipment and the charging receiving end to ascend or descend.
6. The explosion-proof wireless charging system according to any one of claims 1-3, wherein the charging transmitting terminal further comprises:
the transmitting end power converter is electrically connected with a power supply;
a transmitting end coil electrically connected with the transmitting end power converter and electromagnetically coupled with a receiving end coil of the charging receiving end;
the transmitting end controller is electrically connected with the transmitting end power converter and is in communication connection with the sensor controller;
the transmitting end communication module is electrically connected with the transmitting end controller and is not connected with the receiving end communication module of the charging receiving end.
7. The explosion-proof wireless charging system according to claim 6, wherein the charging receiving terminal further comprises:
a receiving end coil electromagnetically coupled to the transmitting end coil;
the receiving end power converter is electrically connected with the receiving end coil and the electric equipment;
a receiving end controller electrically connected with the receiving end power converter;
and the receiving end communication module is electrically connected with the receiving end controller and is not connected with the transmitting end communication module.
8. An explosion-proof wireless charging method employing the explosion-proof wireless charging system according to any one of claims 1 to 7, comprising:
a standard signal obtaining step, namely receiving the temperature signal and the liquid level signal through the sensor controller, and outputting a standard signal or a non-standard signal to the transmitting end controller according to the temperature signal and/or the liquid level signal;
a charging signal acquisition step, wherein the transmitting end controller receives a charging starting signal or a charging stopping signal sent by the charging receiving end or a background server;
and in the wireless charging step, the transmitting end controller controls the charging transmitting end to start or stop wireless charging according to the standard reaching signal, the non-standard reaching signal, the starting charging signal and/or the stopping charging signal.
9. The explosion-proof wireless charging method according to claim 8, wherein the standard reaching signal obtaining step further comprises:
a temperature monitoring signal judging step of receiving the temperature signal through the sensor controller, comparing the temperature signal with a set temperature range, and judging whether the set temperature range is satisfied;
a liquid level monitoring signal judging step, namely receiving the liquid level signal through the sensor controller, comparing the liquid level signal with a preset safe liquid level, and judging whether the liquid level reaches the preset safe liquid level or not;
a standard reaching signal sending step, wherein if the temperature signal meets the set temperature range and the liquid level signal reaches the preset safe liquid level, the sensor controller outputs the standard reaching signal to the transmitting end controller;
and a step of sending a non-standard signal, wherein if the temperature signal does not meet the set temperature range or the liquid level signal does not reach the preset safe liquid level, the sensor controller outputs the non-standard signal to the transmitting end controller.
10. The explosion-proof wireless charging method according to claim 9, wherein the wireless charging step further comprises:
a wireless charging starting step, wherein if the transmitting end controller receives the standard reaching signal and the charging starting signal, the charging transmitting end is controlled to start wireless charging;
and a wireless charging closing step, wherein if the transmitting end controller receives the signal which does not reach the standard and/or the charging stopping signal, the charging transmitting end is controlled to stop wireless charging.
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| CN114825550A (en) * | 2022-05-23 | 2022-07-29 | 北京京能能源技术研究有限责任公司 | Wireless charging device and method for explosion-proof scene |
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