CN109617198B - Wireless charging system of intelligent shopping equipment - Google Patents
Wireless charging system of intelligent shopping equipment Download PDFInfo
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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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- 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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
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Abstract
The invention discloses a wireless charging system of intelligent shopping equipment, wherein electric energy generated by a wireless energy transmitting circuit can respectively charge rechargeable batteries on a plurality of shopping equipment through a plurality of relay circuits, the problems of high labor cost, poor safety coefficient, easy equipment abrasion and the like when the rechargeable batteries are applied to the field of intelligent shopping carts according to the prior art are solved, the unattended wireless automatic charging of the rechargeable batteries of the intelligent shopping equipment without disassembly is realized, the intelligent cleaning power supply obstacle is introduced into a shopping equipment system, the rechargeable batteries of the intelligent shopping equipment can be simultaneously charged through one transmitting circuit, the electric energy is fully utilized, and the charging efficiency is improved.
Description
Technical Field
The invention relates to the technical field of shopping equipment, in particular to a wireless charging system of intelligent shopping equipment.
Background
Shopping carts are widely used in supermarkets, bookstores, libraries, warehouses, and the like. If the shopping cart articles are checked manually, the time and the labor are wasted. In recent years, attempts have been made to implement automatic counting of items by adding intelligent devices, such as automatic identification devices, to shopping carts.
The introduction of intelligent devices has brought problems in power management while improving the efficiency of item counting. Due to the mobility of the location of the cart, smart devices on the cart can almost only provide energy in a battery-powered manner. Rechargeable batteries are preferred because they are recyclable and relatively inexpensive. The existing charging technology for the rechargeable battery of the shopping cart comprises two modes of direct charging and offline charging: the direct charging is realized in a wired mode, namely the shopping cart is directly connected to a power grid through a power adapter for charging, the charging mode requires that enough power access ports are arranged, and exposed wires can bring safety hidden dangers, so that special management must be carried out in the charging process, and the labor cost is increased; the off-line charging is to separate the rechargeable battery from the shopping cart and install the rechargeable battery into a special charging device for charging, and this charging method needs to be equipped with a spare battery, and the repeated disassembling and assembling operations of the battery also result in increased labor cost and battery loss. Therefore, the defects of the existing charging mode hinder the application and popularization of the shopping cart intellectualization, so that improvement is urgently needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides the wireless charging system of the intelligent shopping equipment, which can realize the disassembly-free unattended wireless automatic charging, and can simultaneously charge the rechargeable batteries of a plurality of shopping equipment through one transmitting circuit, thereby fully utilizing the electric energy and improving the charging efficiency.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a wireless charging system of intelligent shopping devices comprises a wireless energy transmitting circuit installed on a charging area, a plurality of relay circuits, a plurality of intelligent shopping devices, a load circuit arranged on each intelligent shopping device and a power utilization module arranged on each intelligent shopping device, wherein the load circuit comprises a receiving coil and a rechargeable battery, and the rechargeable battery is used for supplying power to the power utilization module;
in a charging state, the wireless energy transmitting circuit is sequentially coupled and cascaded with the plurality of relay circuits, the relay coil of each relay circuit is coupled and connected with the corresponding receiving coil, and the rechargeable battery is charged through a charging port of the rechargeable battery.
Furthermore, the wireless energy transmitting circuit comprises a power module, an inverter module and a power resonance module, wherein the power module is used for generating direct current voltage, the inverter module is used for converting the direct current voltage into alternating current voltage to be input into the power resonance module, and the wireless energy transmitting circuit realizes energy transmission through the power resonance module.
Further, the power resonance module comprises resonance inductors L connected in seriesp1And a transmitting coil connected in parallel with the transmitting coil and the resonant inductor Lp1Series power supply compensation capacitor CpThe coil self-inductance of the transmitting coil is LpInternal resistance of the coil being Rp。
Further, in a charging state, the system comprises n relay circuits which are sequentially coupled and connected, wherein n is larger than or equal to 2, the 1 st relay circuit is coupled with the wireless energy transmitting circuit, the first n-1 relay circuits each comprise a relay coil and a relay compensation capacitor which are mutually connected in series, the nth relay circuit comprises a relay coil, a relay compensation capacitor and a relay resistor R which are mutually connected in series, and the coil self-inductance of the ith relay coil is LsiInternal resistance of the coil being RsiAnd the relay compensation capacitor connected in series with the ith relay coil is CsiWherein i is 1,2 … n.
Furthermore, each load circuit comprises a receiving coil, a load compensation capacitor and a rechargeable battery which are mutually connected in series, and the coil self-inductance of the ith receiving coil is LsoiInternal resistance of the coil being RsoiAnd the load compensation capacitor connected in series with the ith receiving coil is CsoiThe resistance of the rechargeable battery connected in series with the i-th receiving coil is Roi。
Further, in a charging state, the mutual inductance between the ith relay coil and the previous coil in the cascaded configuration is MiThe mutual inductance between the ith relay coil and the corresponding receiving coil is MoiThe angular frequency of the transmitting coil, the relay coil and the receiving coil is w, and the parameters in the system satisfy the following conditions:
the coil internal resistance R of each receiving coil in the systemsoiEqual, internal coil resistance R of each relay coilsiEqual, mutual inductance between the transmitter coil and the 1 st relay coil, and mutual inductance M between the relay coilsiEqual, mutual inductance M between each of the relay coils and the corresponding receiver coiloiEqual, each of said load resistances RoiAre equal to each other, and
R＝wMi。
further, the intelligent shopping device is an intelligent shopping cart or an intelligent shopping basket.
Further, when the intelligent shopping device is an intelligent shopping cart, the receiving coil is arranged on a target side surface of the intelligent shopping cart, and the target side surface is a plane perpendicular to the normal driving direction of the intelligent shopping cart.
Further, when the intelligent shopping device is an intelligent shopping basket, the receiving coil is arranged on the bottom surface of the intelligent shopping basket.
Further, each relay circuit is arranged on the corresponding intelligent shopping device together with the load circuit coupled with the relay circuit.
In the wireless charging system of the intelligent shopping equipment, provided by the invention, the electric energy generated by the wireless energy transmitting circuit can be used for respectively charging the rechargeable batteries on the plurality of shopping equipment through the plurality of relay circuits, so that the problems of high labor cost, poor safety coefficient, easy equipment abrasion and the like when the rechargeable batteries are applied to the field of intelligent shopping carts according to the prior art are solved, the unattended wireless automatic charging of the rechargeable batteries of the intelligent shopping equipment without disassembly is realized, the intelligent cleaning power supply obstacle is introduced into the shopping equipment system, the rechargeable batteries of the plurality of intelligent shopping equipment can be simultaneously charged through one transmitting circuit, the electric energy is fully utilized, and the charging efficiency is improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural diagram of a wireless charging system of an intelligent shopping device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wireless energy transmitting circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an equivalent circuit of a wireless charging system of an intelligent shopping device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an arrangement of a receiving coil on an intelligent shopping cart according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another arrangement of a receiving coil on an intelligent shopping cart according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an arrangement of a receiving coil on a smart shopping basket according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a combined relay coil and receive coil provided by an embodiment of the present invention;
fig. 8 is a schematic diagram of a spatial distribution of the system in a charging state according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
The embodiment provides a wireless charging system of intelligent shopping equipment, so as to realize disassembly-free unattended wireless automatic charging, and through a transmitting circuit, rechargeable batteries of a plurality of shopping equipment can be charged simultaneously, electric energy is fully utilized, and charging efficiency is improved, please refer to fig. 1, the wireless charging system of the intelligent shopping equipment 13 provided by the embodiment comprises a wireless energy transmitting circuit 11 installed on a charging area, a plurality of relay circuits 12, a plurality of intelligent shopping equipment 13, a load circuit 131 arranged on each intelligent shopping equipment 13 and an electricity utilization module 132 arranged on each intelligent shopping equipment 13, wherein the load circuit 131 comprises a receiving coil and a rechargeable battery, and the rechargeable battery is used for supplying power to the corresponding electricity utilization module 132; in a charging state, the wireless energy transmitting circuit 11 and the plurality of relay circuits 12 are sequentially coupled and cascaded, the relay coil of each relay circuit 12 is coupled and connected with the corresponding receiving coil, the wireless energy transmitting circuit 11 transmits energy to the relay circuits 12 through the relay coils of the relay circuits 12, the relay circuits 12 transmit energy to the receiving coils through the relay coils, and the rechargeable batteries are charged through the charging ports of the rechargeable batteries.
Referring to fig. 2, the wireless energy transmitting circuit 11 in the embodiment includes a power module 111, an inverter module 112 and a power resonance module 113, the power module 111 is configured to generate a dc voltage, the inverter module 112 is configured to convert the dc voltage into an ac voltage and input the ac voltage into the power resonance module 113, and the wireless energy transmitting circuit 11 transmits energy through the power resonance module 113. In some embodiments, the wireless energy transmitting circuit 11 may further include a DC/DC converter connected between the power module 111 and the inverter module 112, where the DC/DC converter is configured to transform a direct current voltage generated by the power module, and at this time, the inverter module 112 is configured to invert the transformed direct current voltage to obtain an alternating current voltage.
Referring to fig. 3, the power resonant module in this embodiment includes resonant inductors L connected in series with each otherp1And a transmitting coil connected in parallel with the transmitting coil and the resonant inductor Lp1Series power supply compensation capacitor CpThe coil self-inductance of the transmitting coil is LpInternal resistance of the coil being Rp. The system in this embodiment may include n relay circuits coupled in sequence, where n is greater than or equal to 2, where the 1 st relay circuit is coupled to the wireless energy transmitting circuit, see fig. 3, the nth relay circuit in the system is coupled and cascaded from left to right in sequence, where the 1 st relay circuit in the n relay circuits refers to the 1 st relay circuit on the left, the 2 nd relay circuit counted from the left refers to the 2 nd relay circuit, and so on, each of the first n-1 (i.e., n-1 counted from the left) relay circuits includes a relay coil and a relay compensation capacitor connected in series, and the nth relay circuit includes a relay coil and a relay compensation capacitor connected in seriesA relay compensation capacitor and a relay resistor R, wherein the coil self-inductance of the ith relay coil is LsiInternal resistance of the coil being RsiAnd the relay compensation capacitor connected in series with the ith relay coil is CsiWherein i is 1,2 … n. Each load circuit in this embodiment includes a receiving coil, a load compensation capacitor and a rechargeable battery connected in series, and it should be understood that, in the charging state, each relay circuit is coupled to one load circuit, so when the wireless energy transmitting circuit is coupled and cascaded with n relay circuits in sequence in the charging state, the wireless energy transmitting circuit should also charge the rechargeable batteries of n intelligent shopping devices at the same time. In this embodiment, the i-th receiving coil has a coil self-inductance of LsoiInternal resistance of the coil being RsoiAnd the load compensation capacitor connected in series with the ith receiving coil is CsoiThe resistance of the rechargeable battery connected in series with the i-th receiving coil is Roi。
In the charging state, the mutual inductance between the transmitting coil and the 1 st relay coil and the mutual inductance between the relay coils are MiWherein M isiThe mutual inductance between the ith relay coil and the previous coil in the cascaded structure is shown, the cascaded structure in the embodiment is a cascaded structure consisting of a power circuit and a plurality of relay circuits, and the mutual inductance between each relay coil and the corresponding receiving coil is MoiWherein M isoiRepresenting the mutual inductance between the ith relay coil and the corresponding receiving coil, the angular frequency of the transmitting coil, the relay coil and the receiving coil is w, and the parameters in the system provided by the embodiment satisfy the following conditions:
coil internal resistance R of each receiving coil in systemsoiEqual, internal coil resistances R of the relay coilssiEqual, mutual inductance between the transmitter coil and the 1 st relay coil and mutual inductance M between the relay coilsiEqual, mutual inductance M between each relay coil and the corresponding receiver coiloiEqual, resistance R of each rechargeable batteryoiAre equal to each other, and
R＝wMi。
so assume that:
Roi＝Roand then R ═ wM. In some embodiments, the coil self-inductance of each relay coil may be equal, each relay compensation capacitance may be equal, the coil self-inductance of each receive coil may be equal, and each load compensation capacitance may be equal. Therefore, when the system provided by the embodiment is configured, it is simpler to select a batch of coils of the same type as the relay coil, and select a batch of coils of the same type as the receiving coil.
Assuming that the DC voltage before inversion in the wireless energy transmitting circuit is E, and the effective value of the AC voltage after inversion is UacThen, the following relationship is present:
and due to
The overall impedance of the system is purely resistive.
The reflected impedance of each receiver coil reflected into the corresponding relay circuit is:
in the nth relay circuit, L issnAnd CsnAt resonance, the total impedance of the nth relay circuit is:
Zsn＝Zron+Rsn+R (4)
the total impedance of each of the remaining n-1 relay circuits is then:
since the resonant network in the wireless energy transmitting circuit is of an L-C-L structure, according to equation (2), the current in the transmitting coil is:
the current in the 1 st relay circuit is then:
the currents in the remaining n-1 relay circuits are:
the voltage picked up on each rechargeable battery is then:
due to the coil internal resistance R of each receiving coil in the systemsoiEqual, internal coil resistances R of the relay coilssiEqual, mutual inductance between the transmitter coil and the 1 st relay coil and mutual inductance M between the relay coilsiEqual, mutual inductance M between each relay coil and the corresponding receiver coiloiEqual, resistance R of each rechargeable batteryoiIf the impedances reflected by the receiving coils into the corresponding relay circuits are equal according to equation (3), equation (3) can be expressed as:
Zro＝Zroi(i＝1,2…n) (10)
formula (4) is substantially equivalent to:
Zsn＝Zro+Rs+R (11)
formula (5) is substantially equivalent to:
since R ═ wM, formula (12) can be converted to:
in general, since the mutual inductance M between the relay coil and the receiver coil is relatively small, the reflection impedance Z from the receiver coil to the relay coilroIs small, and the internal resistance R of the relay coil is small compared with RsIs also smaller, so R can be ignoredsAnd ZroThen equation (13) can be simplified as: zsi＝Zro+Rs+ R, it follows that the total impedance in each relay circuit is equal, i.e. Zsi＝Zs(i ═ 1,2, n), which can be obtained from formulae (7) and (8):
the current in each relay circuit is equal, as represented by equation (9), when the voltage picked up by the rechargeable battery of each load circuit is equal. Due to the reflected impedance Z from the secondary coil to the relay coilroIs relatively small compared to R, so that when the impedance of the load circuit changes, ZroThe change of the voltage does not cause great change of the impedance in the relay circuit, therefore, the system provided by the embodiment can reduce the sensitivity of the system output about load change, enhance the stability of the system, and can ensure that the voltage picked up by each stage of rechargeable battery is equal and constant, and if the rechargeable battery of the intelligent shopping equipment is charged by the system provided by the embodiment, the system breakdown caused by the change of the resistance value of the battery in the charging process can be avoided.
In this embodiment, the intelligent shopping device may be an intelligent shopping cart or an intelligent shopping basket, and when the intelligent shopping device is the intelligent shopping cart, preferably, the receiving coil in the load circuit may be disposed on a target side of the intelligent shopping cart, where the target side of the intelligent shopping cart refers to a plane perpendicular to a normal traveling direction of the intelligent shopping cart on the intelligent shopping cart, for example, as shown in fig. 4, the receiving coil may be disposed on a front side of the intelligent shopping cart, or may be disposed on a front side of the intelligent shopping cart as shown in fig. 5, so that in a charging state, the intelligent shopping carts may be stacked to reduce a size of an occupied space. When the intelligent shopping device is an intelligent shopping basket, the receiving coil in the load circuit can be arranged on the side surface of the intelligent shopping basket or on the bottom surface of the intelligent shopping basket, as shown in fig. 6.
In an example, a relay circuit can be disposed on the corresponding intelligent shopping device together with a load circuit, the relay circuit on an intelligent shopping cart can transmit the received power to the load circuit on the intelligent shopping cart through its relay coil, so as to charge the rechargeable battery on the intelligent shopping cart, so that each intelligent shopping device in this example is disposed with a set of relay coil and receiving coil, for example, as shown in fig. 7, a set of relay coil 71 and receiving coil 72 on each intelligent shopping device can be disposed in the manner shown in fig. 7, for the convenience of understanding, here, the intelligent shopping device is taken as an example of an intelligent shopping cart, each set of intelligent shopping cart is disposed with a set of mutually coupled relay coil and receiving coil on the front side, a partial schematic diagram of the spatial arrangement in the charging state can be seen in fig. 8, according to the introduction, the relay circuit of the last stage is connected with the relay resistor R in series, so that for convenience of distinguishing, a striking mark can be arranged on the intelligent shopping cart connected with the relay resistor R in series to prompt that the intelligent shopping cart is stacked at the last stage.
In another example, the relay circuit coupled to the receiving coil of the intelligent shopping device can be separated from the intelligent shopping device, and each relay coil can be fixed on the charging area, so that the receiving coil of the intelligent shopping cart can be directly close to the relay coil when the intelligent shopping cart needs to be charged.
Finally, it is also necessary to explain the electricity utilization module in this embodiment, the electricity utilization module in this embodiment may be any device that needs electricity and is disposed on the intelligent shopping device, for example, it may be a driving device, the rechargeable battery may drive the intelligent shopping device to automatically move by supplying power to the driving device, for example, automatically move to a charging area to charge, or may be a settlement device, the rechargeable battery may realize settlement of bills by supplying power to the settlement device, so that the user may pay directly on the shopping device without queuing for a purchase order, and the life of the user is more convenient.
It is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A wireless charging system of intelligent shopping devices is characterized by comprising a wireless energy transmitting circuit, a plurality of relay circuits, a plurality of intelligent shopping devices, a load circuit and a power utilization module, wherein the wireless energy transmitting circuit is installed on a charging area;
in a charging state, the wireless energy transmitting circuit is sequentially coupled and cascaded with the plurality of relay circuits, the relay coil of each relay circuit is coupled and connected with the corresponding receiving coil, and the rechargeable battery is charged through a charging port of the rechargeable battery;
in a charging state, the system comprises n relay circuits which are sequentially coupled and connected, wherein n is more than or equal to 2, the 1 st relay circuit is coupled with the wireless energy transmitting circuit, the first n-1 relay circuits comprise relay coils and relay compensation capacitors which are mutually connected in series, the nth relay circuit comprises relay coils, relay compensation capacitors and relay resistors which are mutually connected in series, and the coil self-inductance of the ith relay coil is LsiInternal resistance of the coil being RsiAnd the relay compensation capacitor connected in series with the ith relay coil is CsiWherein i is 1,2 … n; the reflected impedance Z from the receiver coil to the relay coil is compared to the relay resistance RroNeglect;
in a charging state, the mutual inductance between the ith relay coil and the previous coil in the cascade framework is MiThe mutual inductance between the ith relay coil and the corresponding receiving coil is MoiThe angular frequency of the transmitting coil, the relay coil and the receiving coil in the wireless energy transmitting circuit is w, and the parameters in the system meet the following conditions:
the coil internal resistance R of each receiving coil in the systemsoiEqual, internal coil resistance R of each relay coilsiEqual, mutual inductance between the transmitter coil and the 1 st relay coil, and mutual inductance M between the relay coilsiEqual, mutual inductance M between each of the relay coils and the corresponding receiver coiloiEqual, resistance R of each rechargeable batteryoiAre equal to each other, and
R＝wMi；
each relay circuit is arranged on the corresponding intelligent shopping device together with the load circuit coupled with the relay circuit.
2. The wireless charging system of intelligent shopping device as claimed in claim 1, wherein the wireless energy transmitting circuit comprises a power module, an inverter module and a power resonance module, the power module is used for generating a dc voltage, the inverter module is used for converting the dc voltage into an ac voltage and inputting the ac voltage into the power resonance module, and the wireless energy transmitting circuit realizes energy transmission through the power resonance module.
3. The wireless charging system for intelligent shopping devices as claimed in claim 2, wherein the power resonance modules include mutual resonantSeries resonant inductor Lp1And a transmitting coil connected in parallel with the transmitting coil and the resonant inductor Lp1Series power supply compensation capacitor CpThe coil self-inductance of the transmitting coil is LpInternal resistance of the coil being Rp。
4. The wireless charging system of intelligent shopping device as claimed in claim 3, wherein each of said load circuits comprises a receiving coil, a load compensation capacitor and a rechargeable battery connected in series, the coil self-inductance of the i-th receiving coil is LsoiInternal resistance of the coil being RsoiAnd the load compensation capacitor connected in series with the ith receiving coil is CsoiThe resistance of the rechargeable battery connected in series with the i-th receiving coil is Roi。
5. The wireless charging system of intelligent shopping devices of claim 1, wherein the intelligent shopping device is an intelligent shopping cart or an intelligent shopping basket.
6. The wireless charging system of intelligent shopping device as claimed in claim 5, wherein when the intelligent shopping device is an intelligent shopping cart, the receiving coil is disposed on a target side of the intelligent shopping cart, the target side being a plane perpendicular to a normal driving direction of the intelligent shopping cart.
7. The wireless charging system of intelligent shopping devices according to claim 6, wherein when the intelligent shopping device is an intelligent shopping basket, the receiving coil is disposed at the bottom surface of the intelligent shopping basket.
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| CN111355310A (en) * | 2020-04-15 | 2020-06-30 | 江苏方天电力技术有限公司 | Cascading wireless charging system of power inspection robot and control method |
| CN114006478B (en) * | 2021-11-17 | 2024-01-30 | 重庆前卫无线电能传输研究院有限公司 | Electronic mall exhibition stand based on wireless power supply and circuit parameter design method thereof |
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| CN105322626A (en) * | 2015-08-14 | 2016-02-10 | 李志坚 | Wirelessly charged intelligent shopping cart and wireless charging system therefor |
| CN105515141A (en) * | 2016-02-04 | 2016-04-20 | 扬州大学 | Desktop wireless group charging system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105322626A (en) * | 2015-08-14 | 2016-02-10 | 李志坚 | Wirelessly charged intelligent shopping cart and wireless charging system therefor |
| CN105515141A (en) * | 2016-02-04 | 2016-04-20 | 扬州大学 | Desktop wireless group charging system |
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