CN210693566U - Wireless charging equipment and protection circuit thereof - Google Patents
Wireless charging equipment and protection circuit thereof Download PDFInfo
- Publication number
- CN210693566U CN210693566U CN201921303006.0U CN201921303006U CN210693566U CN 210693566 U CN210693566 U CN 210693566U CN 201921303006 U CN201921303006 U CN 201921303006U CN 210693566 U CN210693566 U CN 210693566U
- Authority
- CN
- China
- Prior art keywords
- module
- voltage
- receiving
- output
- wireless power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The utility model relates to the technical field of electronics, a wireless charging equipment and protection circuit thereof is provided, the wireless charging equipment includes wireless power transmitting terminal and wireless power receiving terminal, the wireless power transmitting terminal includes first control module and power module, the wireless power receiving terminal includes second control module and receiving module, the voltage output end of receiving module is connected with the load, the first control module is connected with the second control module through wireless communication, the protection circuit includes voltage detection module, voltage comparison module and short circuit module; the input end of the voltage detection module is used for being connected with the voltage output end of the receiving module, the output end of the voltage detection module is connected with the first input end of the voltage comparison module, the second input end of the voltage comparison module inputs a comparison voltage threshold value, and the output end of the voltage comparison module is connected with the short circuit module. When overvoltage abnormity occurs, the wireless power receiving module is always in a short-circuit state through the short-circuit module, and decoupling of the wireless power receiving module and a load is achieved.
Description
Technical Field
The utility model belongs to the technical field of the electron, especially, relate to a wireless battery charging outfit and protection circuit thereof.
Background
The charger for charging batteries of electric vehicles and electric moped mainly works in a constant current interval. In a non-contact charging mode, an energy transmitting end (a primary side system) and an energy receiving end (a secondary side system) need to exchange data through wireless communication while transmitting energy, and therefore closed-loop control of the whole wireless charging system is formed. An energy receiving end of a wireless charging system is generally integrated on electric equipment or a battery, and the design of the energy receiving end is determined by the limiting conditions of the size, the heat dissipation, the cost and the like to have high power density, low cost and high reliability as much as possible. At present, in most wireless charging products, an energy receiving end only comprises three main parts, namely a secondary coil, a compensation network and high-frequency rectification, under the condition of constant current output, a load cannot be opened, otherwise, the output voltage is rapidly increased, and the energy receiving end works in a short-circuit state. Due to the reasons of data transmission delay, system response speed and the like, the whole system protection cannot be realized by adjusting the output power by the energy transmitting end alone.
In order to ensure charging safety and reduce standby loss, the control power of a secondary controller and a relay of the wireless charging system is generally taken from a high-voltage side, and a weak-current control power supply is not provided by power utilization equipment. At the initial moment, the output relay is disconnected, the primary side system injects micro energy, the secondary side controller is activated after the voltage of the secondary side bus is increased, and the primary side and the secondary side realize communication handshake and data interaction. And after the handshake is successful, the output relay is opened, the charging process is started, the primary side increases the input power, and the closed-loop control of power output is realized through wireless communication. When the output voltage or current of the secondary side is higher than the protection threshold value, the high-voltage bus is short-circuited with the ground through the short-circuiting device, and the decoupling of the battery and the non-contact charger is realized. However, after the short-circuit decoupling, the voltage of the dc bus decreases to 0V, and the secondary controller and the short-circuit device cannot be powered, so that the load (battery pack) and the charging device are still damaged by the excessively high output voltage.
In summary, the problem that the rear-stage voltage is increased to damage the storage battery pack and the charging equipment under the open-circuit condition of the load and the like of the existing wireless charging equipment is solved.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a wireless charging equipment and protection circuit thereof aims at solving present wireless charging mode and has the problem that can cause the back level voltage to rise and then damage storage battery and charging equipment under the load condition of opening a way.
The embodiment of the utility model provides a protection circuit in a first aspect, be applied to wireless charging equipment, wireless charging equipment includes wireless power transmitting terminal and wireless power receiving terminal, wireless power transmitting terminal includes first control module and power module, wireless power receiving terminal includes second control module and receiving module, receiving module's voltage output end is used for being connected with the load, first control module with second control module wireless communication is connected;
the protection circuit comprises a voltage detection module, a voltage comparison module and a short circuit module;
the input end of the voltage detection module is used for being connected with the voltage output end of the receiving module, the output end of the voltage detection module is connected with the first input end of the voltage comparison module, the second input end of the voltage comparison module is used for inputting a comparison voltage threshold, and the output end of the voltage comparison module is connected with the short circuit module;
the voltage detection module is used for detecting the output voltage output to the load by the receiving module;
the voltage comparison module is used for comparing the output voltage with a comparison voltage threshold value, and outputting a control level to the short-circuit module when the output voltage exceeds the comparison voltage threshold value;
and the short circuit module is used for being continuously conducted when the control level is received, so that the receiving module is short-circuited.
The embodiment of the utility model provides a second aspect provides a wireless charging equipment, wireless charging equipment include the wireless power transmitting terminal, with wireless power transmitting terminal wireless connection's wireless power receiving terminal and as the first aspect protection circuit, protection circuit with the wireless power receiving terminal is connected.
The embodiment of the utility model provides a wireless charging equipment and protection circuit thereof, make wireless power receiving module be in the short-circuit state always through the short-circuit module when the excessive pressure is unusual appearing in the load, realize the decoupling zero of wireless power receiving module and load, avoid the unable short circuiter power supply of maintaining after the second control module loses the electricity, after short-circuit decoupling state lasts a period of time, wireless power sending module can the stop power supply, protect load and wireless charging device effectively, solve present wireless charging equipment can cause the back level voltage to rise and then damage storage battery and charging equipment's problem under the condition of opening a way such as load.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a protection circuit according to a first embodiment of the present invention;
fig. 2 is a schematic circuit diagram illustrating an example of a protection circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a wireless charging device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It is to be noted that the term "comprises" and any variants thereof in the description and claims of the present invention are intended to cover non-exclusive inclusions. For example, a system, product or apparatus that comprises a list of elements is not limited to those elements listed, but may alternatively include other elements not listed or inherent to such product or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
The embodiment of the utility model provides a can cause the problem that back level voltage risees and then damage storage battery and battery charging outfit in order to solve present wireless battery charging outfit under the condition of opening a way such as load, a wireless battery charging outfit and its protection circuit is provided, make wireless power receiving module be in the short-circuit state always through the short-circuit module when overvoltage anomaly appears in the load through protection circuit, realize the decoupling zero of wireless power receiving module and load, can't maintain the short circuiter power supply after avoiding second control module to lose the electricity, after short-circuit decoupling zero state lasts a period, wireless power sending module can the stop power supply, protect load and wireless charging device effectively.
To specifically describe the wireless charging device and the protection circuit thereof, the following detailed description is made with reference to specific embodiments:
the first embodiment is as follows:
fig. 1 shows a structure of a protection circuit provided in a first embodiment of the present invention, and for convenience of description, only the portions related to the first embodiment of the present invention are shown, and detailed descriptions are as follows:
referring to fig. 1, an embodiment of the present invention provides a protection circuit 100 for a wireless charging device, which is connected to a wireless power receiving terminal of the wireless charging device. The wireless charging device comprises a wireless power transmitting end 200 and a wireless power receiving end 300, wherein the wireless power transmitting end 200 comprises a first control module 210 and a power supply module 220, the wireless power receiving end 300 comprises a second control module 310 and a receiving module 320, an output end of the receiving module 320 is used for being connected with a load (a storage battery pack), and the first control module 210 is in wireless communication connection with the second control module 220.
The protection circuit 100 includes a voltage detection module 110, a voltage comparison module 120, and a short circuit module 130.
The input end of the voltage detection module 110 is used for being connected with the voltage output end of the receiving module 320, the output end of the voltage detection module 110 is connected with the first input end of the voltage comparison module 120, the second input end of the voltage comparison module 120 inputs the comparison voltage threshold, and the output end of the voltage comparison module 120 is connected with the short circuit module 130.
The voltage detection module 110 is used for detecting the output voltage output to the load by the receiving module 320.
The voltage comparing module 120 is configured to compare the output voltage with a comparison voltage threshold, and output a control level to the short circuit module 130 when the output voltage exceeds the comparison voltage threshold.
The short circuit module 130 is configured to be continuously turned on when receiving the control level, so as to short circuit the receiving module 320.
In a specific application, the first control module 210 and the second control module 310 may be communicatively connected through an infrared wireless communication manner, and may also be communicatively connected through bluetooth, which is not limited herein.
In a specific application, the power supply module 220 transmits the electric energy to the receiving module 320 through resonant electromagnetic induction, and the voltage output end of the receiving module 320 outputs a voltage to a load (a battery pack) to charge the battery pack.
In a specific application, when the overvoltage abnormality occurs, the voltage of the first input terminal of the voltage comparing module 120 is higher than the comparison voltage threshold, and the voltage comparing module 120 outputs the control level to the short circuit module 130. The overvoltage abnormality includes an open circuit (load open circuit) of the wireless power receiving terminal in an abnormal condition, an overvoltage abnormality caused by a load becoming smaller due to a contact failure, and an abnormality of an output voltage increase at the voltage output terminal of the receiving module due to other reasons, which is not limited herein. It should be noted that, since the wireless power receiving terminal operates in a constant current state, when the load of the wireless power receiving terminal is open or has poor contact, the output voltage VDD of the voltage output terminal of the receiving module may be increased, that is, the voltage of the first input terminal of the input voltage comparing module 120 may be increased.
In a specific application, the second control module 310 of the wireless power receiving terminal 300 is a working power supply obtained by performing power conversion on the output voltage VDD at the voltage output terminal of the receiving module 320 through a power conversion circuit, and the working power supply is a 5V/3.3V dc power supply.
As an implementation manner of this embodiment, the protection circuit further includes a power module, an input end of the power module is used for being connected to a voltage output end of the receiving module, and an output end of the power module is respectively connected to the voltage comparator and the second control module.
In specific application, the power module performs DC/DC voltage reduction on the received voltage to obtain a 5V working power supply, and the 5V working power supply is input to the second control module to provide working voltage for the second control module. And generating a preset comparison voltage threshold value, and inputting the comparison voltage threshold value into a second input end of the voltage comparison unit to be used as a reference voltage for voltage comparison.
As an implementation manner of this embodiment, the power module includes a voltage reduction unit and a voltage conversion unit; the input end of the voltage reduction unit is the input end of the power module, the output end of the voltage reduction unit is connected with the input end of the voltage conversion unit, the first output end of the voltage conversion unit is connected with the second control module, and the output end of the voltage conversion unit is connected with the voltage comparison module.
As shown in fig. 2, as an embodiment of the present invention, fig. 2 shows an exemplary circuit schematic diagram of the protection circuit 100 of the present embodiment.
Referring to fig. 2, as an implementation manner, in a specific application, the voltage comparing module includes a voltage comparator U1. The first terminal of the voltage comparator U1 is a first input terminal of the voltage comparison module, the second terminal of the voltage comparator U1 is a second input terminal of the voltage comparison module, and the third terminal of the voltage comparator U1 is an output terminal of the voltage comparison module.
In a specific application, the short-circuit module comprises a thyristor Q1, a first end of the thyristor Q1 is connected with the voltage comparison module, a second end of the thyristor Q1 is connected with the voltage output end of the receiving module, and a third end of the thyristor Q1 is grounded.
The overcurrent protection circuit is further described with reference to the working principle and fig. 2 as follows:
when the battery pack is in an abnormal condition such as poor contact or open circuit during charging, the output voltage VDD of the voltage output terminal of the receiving module is increased due to the fact that the wireless power receiving terminal works in a constant current mode and the open circuit (or poor contact) of the rear-connected load (battery pack) causes the increase of the output voltage VDD of the voltage output terminal of the receiving module, the output voltage detected by the voltage detection module 110 is increased, the detected output voltage is input to the voltage comparator U1 to be compared with a comparison voltage threshold, when the output voltage is higher than the comparison voltage threshold, the voltage comparator U1 outputs a high level to enable the thyristor Q1 to be conducted, after the thyristor Q1 is conducted, the wireless power receiving terminal is short-circuited, the voltage of the direct current bus is reduced to 0, and the second control module 310 is powered. However, the voltage input by the wireless power transmitting end is not reduced, due to the constant current characteristic of the system, except for the fact that the thyristor is conducted to cause larger impact current instantly, the current value flowing through the thyristor is always kept in a constant state, and according to the characteristic of the thyristor, the thyristor is kept in a conducting state as long as continuous current flows through the thyristor no matter how the trigger voltage changes after the thyristor is conducted, so that the thyristor is always kept in the conducting state. Since the bus voltage is 0 (i.e. the output voltage is 0), the second module 310 does not work when losing power, and the wireless communication connection with the first control module 210 is interrupted, and when the first control module 210 of the wireless power transmitting end detects the communication interruption between the first control module and the second control module 310, it is determined that the communication is abnormal, and the power supply is stopped. The overvoltage protection of pure hardware is realized through a simple protection circuit, the protection circuit has high reliability, the protection circuit of the wireless charging device provided by the embodiment has low cost, and the wireless power receiving module is always in a short-circuit state through the short-circuit module when overvoltage abnormity occurs, so that the decoupling of the wireless power receiving module and a load is realized. The situation that the second control module cannot maintain the power supply of the short-circuit device after losing power is avoided, and the wireless power transmitting module stops supplying power after the short-circuit decoupling state lasts for a period of time, so that the load and the wireless charging device are effectively protected.
The protection circuit that this embodiment provided makes wireless power receiving module be in the short circuit state always through the short circuit module when overvoltage anomaly appears in the load, realizes the decoupling zero of wireless power receiving module and load, can't maintain the short circuiter power supply after avoiding the second control module to lose the electricity, after short circuit decoupling state lasts a period, wireless power sending module can stop the power supply, protect load and wireless charging device effectively, solve present wireless charging equipment and can cause the rising of back level voltage and then damage storage battery and battery charging outfit under the condition of opening a way such as load.
Example two:
the embodiment of the utility model provides a second wireless charging equipment 10 that provides. The wireless charging device 10 includes a wireless power transmitting end 200, a wireless power receiving end 300 wirelessly connected to the wireless power transmitting end 200, and the protection circuit 100 according to the first embodiment.
In a specific application, the wireless power transmitting terminal 200 includes a first control module 210 and a power supply module 220, the wireless power receiving module 300 includes a second control module 310 and a receiving module 320, a voltage output terminal of the receiving module 320 is used for being connected with a load, and the first control module 210 is in communication connection with the second control module 310; the protection circuit 100 is connected to the receiving module 320.
In a specific application, the first control module 210 and the second control module 310 may be communicatively connected through an infrared wireless communication manner, and may also be communicatively connected through bluetooth, which is not limited herein.
In a specific application, the power supply module 220 transmits the electric energy to the receiving module 320 through resonant electromagnetic induction, and the voltage output end of the receiving module 320 outputs a voltage to a load (a battery pack) to charge the battery pack.
In a specific application, the receiving module 320 includes a receiving unit 321 and a rectifying output unit 322.
The receiving unit 321 is wirelessly connected to the power supply module 220, the receiving unit 321 is connected to the rectification output unit 322, and an output end of the rectification output unit 322 is a voltage output end of the receiving module 320.
In a specific application, the receiving unit 321 includes a receiving coil. And receiving the wireless power output by the power supply module through the receiving coil.
In a specific application, the rectified output unit 322 includes a rectifier. The wireless power received by the receiving coil is rectified and filtered through the rectifier to generate output voltage and the output voltage is output to a load.
It should be noted that, the embodiment of the present invention provides a wireless charging device, because with the present invention the embodiment of the method shown in fig. 1 is based on the same concept, the technical effect brought by the embodiment of the method shown in fig. 1 is the same as the embodiment of the method shown in fig. 1, and specific contents can be referred to the description in the embodiment of the method shown in fig. 1 of the present invention, which is not repeated herein.
Therefore, the wireless charging device provided by this embodiment can also enable the wireless power receiving module to be in a short-circuit state all the time through the short-circuit module when the load is in an overvoltage abnormal state, so as to decouple the wireless power receiving module from the load, and avoid that the second control module cannot maintain the short-circuit device to supply power after losing power.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A protection circuit is characterized by being applied to wireless charging equipment, wherein the wireless charging equipment comprises a wireless power transmitting end and a wireless power receiving end, the wireless power transmitting end comprises a first control module and a power supply module, the wireless power receiving end comprises a second control module and a receiving module, the voltage output end of the receiving module is used for being connected with a load, and the first control module is in wireless communication connection with the second control module;
the protection circuit comprises a voltage detection module, a voltage comparison module and a short circuit module;
the input end of the voltage detection module is used for being connected with the voltage output end of the receiving module, the output end of the voltage detection module is connected with the first input end of the voltage comparison module, the second input end of the voltage comparison module is used for inputting a comparison voltage threshold, and the output end of the voltage comparison module is connected with the short circuit module;
the voltage detection module is used for detecting the output voltage output to the load by the receiving module;
the voltage comparison module is used for comparing the output voltage with a comparison voltage threshold value, and outputting a control level to the short-circuit module when the output voltage exceeds the comparison voltage threshold value;
and the short circuit module is used for being continuously conducted when the control level is received, so that the receiving module is short-circuited.
2. The protection circuit of claim 1, further comprising a power module;
the input end of the power supply module is used for being connected with the voltage output end of the receiving module, the output end of the power supply module is connected with the voltage comparison module, and the output end of the power supply module is also used for being connected with the second control module.
3. The protection circuit according to claim 2, wherein the power supply module includes a voltage step-down unit and a voltage conversion unit;
the input end of the voltage reduction unit is the input end of the power module, the output end of the voltage reduction unit is connected with the input end of the voltage conversion unit, the first output end of the voltage conversion unit is connected with the second control module, and the output end of the voltage conversion unit is connected with the voltage comparison module.
4. The protection circuit of claim 1, wherein the voltage comparison module comprises a voltage comparator;
the first end of the voltage comparator is the first input end of the voltage comparison module, the second end of the voltage comparator is the second input end of the voltage comparison module, and the third end of the voltage comparator is the output end of the voltage comparison module.
5. The protection circuit of claim 1, wherein the shorting module comprises a thyristor;
the first end of the thyristor is connected with the voltage comparison module, the second end of the thyristor is connected with the voltage output end of the receiving module, and the third end of the thyristor is grounded.
6. A wireless charging device, comprising a wireless power transmitting terminal, a wireless power receiving terminal wirelessly connected to the wireless power transmitting terminal, and the protection circuit according to any one of claims 1 to 5, wherein the protection circuit is connected to the wireless power receiving terminal.
7. The wireless charging device of claim 6, wherein the wireless power transmitting terminal comprises a first control module and a power supply module, the wireless power receiving module comprises a second control module and a receiving module, a voltage output terminal of the receiving module is configured to be connected to a load, and the first control module is communicatively connected to the second control module; the protection circuit is connected with the receiving module.
8. The wireless charging device of claim 7, wherein the receiving module comprises a receiving unit and a rectifying output unit;
the receiving unit is wirelessly connected with the power supply module, the receiving unit is connected with the rectification output unit, and the output end of the rectification output unit is the voltage output end of the receiving module.
9. The wireless charging device of claim 8, wherein the receiving unit comprises a receiving coil.
10. The wireless charging device of claim 8, wherein the rectified output unit comprises a rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921303006.0U CN210693566U (en) | 2019-08-09 | 2019-08-09 | Wireless charging equipment and protection circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921303006.0U CN210693566U (en) | 2019-08-09 | 2019-08-09 | Wireless charging equipment and protection circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210693566U true CN210693566U (en) | 2020-06-05 |
Family
ID=70883245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921303006.0U Active CN210693566U (en) | 2019-08-09 | 2019-08-09 | Wireless charging equipment and protection circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210693566U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518706A (en) * | 2019-08-09 | 2019-11-29 | 深圳智链物联科技有限公司 | A kind of wireless charging device and its protection circuit |
| CN113555922A (en) * | 2021-07-01 | 2021-10-26 | 莫忘初网络科技(上海)有限公司 | Auxiliary device for preventing short circuit from causing loss for wireless charging of mobile communication equipment |
-
2019
- 2019-08-09 CN CN201921303006.0U patent/CN210693566U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518706A (en) * | 2019-08-09 | 2019-11-29 | 深圳智链物联科技有限公司 | A kind of wireless charging device and its protection circuit |
| CN113555922A (en) * | 2021-07-01 | 2021-10-26 | 莫忘初网络科技(上海)有限公司 | Auxiliary device for preventing short circuit from causing loss for wireless charging of mobile communication equipment |
| CN113555922B (en) * | 2021-07-01 | 2022-12-06 | 深圳市联科利隆电子科技有限公司 | Auxiliary device for preventing short circuit from causing loss for wireless charging of mobile communication equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5473998B2 (en) | Non-contact power supply equipment | |
| JP2019146481A (en) | Terminal charging system, charging method, and power supply adapter | |
| CN105305660B (en) | A kind of non-contact charge open-circuit protecting device | |
| CN210693566U (en) | Wireless charging equipment and protection circuit thereof | |
| CN104319740A (en) | Monitoring and protecting device for electric field coupling wireless charging system and method thereof | |
| CN202513610U (en) | Charging device | |
| CN207304062U (en) | A kind of lithium battery system self-powered overdischarging protector | |
| CN108051683B (en) | Load connection or disconnection detection circuit, power supply control circuit and control method | |
| CN105071551A (en) | Wireless energy transmission device | |
| CN110518706A (en) | A kind of wireless charging device and its protection circuit | |
| CN104348139A (en) | Safe energy-saving power supply | |
| CN203896009U (en) | On-line discharge control modular circuit for transformer station storage battery | |
| CN105680509A (en) | Charging pile with power failure processing function | |
| CN101767588A (en) | Vehicle launch control system and control method | |
| CN105262171A (en) | Battery charging protection control system and method | |
| CN107979060A (en) | A kind of charge-discharge circuit and power supply power-supplying circuit and control method | |
| CN210680418U (en) | Wireless charging equipment and protection circuit thereof | |
| CN103259422A (en) | Power supply device | |
| CN202268715U (en) | Charging device possessing overcharge detection protection function | |
| CN202586744U (en) | Vehicle direct current converter | |
| CN109760544B (en) | Top charging bow direct current charging control guide circuit and implementation method | |
| CN103928964B (en) | Transformer station's integrated power supply communication power device | |
| WO2017134346A1 (en) | Method for maintaining a battery | |
| CN203205971U (en) | Direct-current type backup power supply and outdoor direct-current type backup power supply using the same | |
| CN104716719A (en) | Battery management device with fuse |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |