CN111478136B - Power adapter and electric connector thereof - Google Patents
Power adapter and electric connector thereof Download PDFInfo
- Publication number
- CN111478136B CN111478136B CN202010345500.4A CN202010345500A CN111478136B CN 111478136 B CN111478136 B CN 111478136B CN 202010345500 A CN202010345500 A CN 202010345500A CN 111478136 B CN111478136 B CN 111478136B
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- China
- Prior art keywords
- adapter
- signal
- electric connector
- resistor
- mcu
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
- H01R31/065—Intermediate parts for linking two coupling parts, e.g. adapter with built-in electric apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/68—Structural association with built-in electrical component with built-in fuse
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a power adapter, which comprises a voltage transformation circuit and a rectification circuit, and is characterized in that: the adapter mcu also comprises a signal receiver, wherein the signal receiver receives an indication signal from the matched electric connector and sends the indication signal to the adapter mcu; the adapter mcu controls the feedback unit to send a feedback signal to the electric connector; and the electric connector confirms that the power adapter is the original power adapter after receiving the feedback signal. The invention provides an adapter, wherein an electric connector sends an indication signal to the adapter when in use, the adapter receives the signal and sends a feedback signal, and the electric connector confirms that the adapter is an original adapter after receiving the feedback signal, so that the mixing use of the adapter is avoided. In the invention, the feedback signal is a sound signal, and the sound signal not only can help the electric connector to identify the identity of the adapter, but also can more directly prompt the user that the adapter is the original adapter.
Description
Technical Field
The invention relates to the technical field of charging, in particular to a power adapter and an electric connector thereof.
Background
With the progress and development of society, more and more electronic products enter people's daily life, such as e-book readers, tablet computers, touch and talk pens, mobile phones and the like. Especially, almost one hand of a mobile phone is used, when more people are present, the adapters can be randomly placed, if the appearance difference of the adapters is large, the adapters are easy to recognize, and for the adapters with small appearance difference, the adapters are difficult to distinguish, so that the hybrid adapters not only can influence the charging speed, but also influence the service life of the battery and the adapters, and sometimes even can cause accidents.
The application numbers are: 200610063083.4, the control circuit and method for identifying the power adapter provides a solution to the above problem, the solution uses the voltage control switch to control the on/off of the charging circuit, when the power adapter is not the original adapter, the charging is stopped, the solution ignores the user experience, many times, some electronic products that we buy only configure the usb cable, do not configure the adapter, occasionally still need to use the adapter of other devices, at this time, as long as the charging safety can be ensured.
Disclosure of Invention
The present invention provides a power adapter and an electrical connector thereof, which aims at the problems of the prior art.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides a power adapter, includes vary voltage circuit and rectifier circuit, its characterized in that: the adapter mcu also comprises a signal receiver, wherein the signal receiver receives an indication signal from the matched electric connector and sends the indication signal to the adapter mcu; the adapter mcu controls the feedback unit to send a feedback signal to the electric connector; and the electric connector confirms that the power adapter is the original power adapter after receiving the feedback signal.
Further, the adapter temperature detection circuit is also included; the temperature detection circuit is connected with the adapter mcu and sends a temperature signal to the adapter mcu; and the adapter mcu starts the adapter power-off protection circuit when the temperature signal exceeds a safety threshold value.
Further, the adapter power-off protection circuit comprises a first relay, a fourth resistor and a light-emitting diode; the fourth resistor is connected with the light emitting diode in series; the first relay is connected in parallel with a series circuit consisting of a fourth resistor and a light-emitting diode; and the first relay and the fourth resistor are both connected with the adapter mcu.
Further, the signal receiver is a wireless communication module; the feedback unit is a sound generating unit, and the sound signal generated by the adapter mcu driving sound generating unit is sent to the electric connector as a feedback signal.
Further, the device comprises a signal sending module and a feedback signal receiving circuit; the signal sending module sends an indication signal to the power adapter; the feedback signal receiving circuit receives a feedback signal sent by the power adapter and sends the feedback signal to the electric connector mcu; the electric connector mcu judges whether the voltage detection circuit needs to be started according to whether the feedback signal is received.
Further, the feedback signal receiving circuit comprises a sound pickup, a filter capacitor and a comparator which are connected in sequence; the sound pickup picks up sound signals emitted by the sound emitting unit; the filter capacitor is used for filtering the sound signal; the comparator and the feedback resistor are connected to form a hysteresis comparator.
Further, the power-off protection circuit of the electric connector is also included; the electric connector power-off protection circuit comprises a self-recovery fuse; one end of the self-recovery fuse is connected with the electric connector mcu, and the other end of the self-recovery fuse is connected with the fifth resistor; the other end of the fifth resistor is connected with the equipment battery.
Further, the voltage detection circuit comprises a second relay and a fourth resistor connected in series with the second relay; the fourth resistor is connected with the electric connector mcu and used as a protection resistor to protect the second relay; and the second relay is connected with the output end of the fifth resistor.
The invention has the beneficial effects that:
the invention provides an adapter and an electric connector matched with the adapter, wherein the electric connector sends an indication signal to the adapter when in use, the adapter receives the signal and sends a feedback signal, and the electric connector confirms that the adapter is an original adapter after receiving the feedback signal, so that the mixed use of the adapter is avoided. In the invention, the feedback signal is a sound signal, and the sound signal not only can help the electric connector to identify the identity of the adapter, but also can more directly prompt the user that the adapter is the original adapter. Because a user occasionally has to use the charger in a mixed way, in order to ensure the charging safety, the adapter is also provided with an adapter temperature detection circuit and an adapter power-off protection circuit; the electric connector is additionally provided with the voltage detection circuit and the electric connector power-off protection circuit, after the feedback signal is not received, the voltage detection circuit is started to detect the charging voltage, and if the charging voltage exceeds a safety threshold value, the electric connector power-off protection circuit is started to stop charging, so that the charging safety is ensured.
Drawings
FIG. 1 is a schematic block circuit diagram of an adapter of the present invention;
FIG. 2 is a schematic diagram of the circuit structure of the adapter of the present invention;
FIG. 3 is a schematic block diagram of an electrical connector circuit according to the present invention;
fig. 4 is a schematic circuit diagram of the electrical connector of the present invention.
In the figure: 1-adapter mcu, 11-first resistor, 2-signal receiver, 3-feedback unit, 31-second resistor, 32-triode, 33-buzzer, 4-adapter base circuit, 5-temperature detection circuit, 51-third resistor, 52-temperature sensor, 6-adapter power-off protection circuit, 61-first relay, 62-fourth resistor, 63-light emitting diode, 7-rechargeable battery, 8-electric connector mcu, 9-signal sending module, 10-feedback signal receiving circuit, 101-sound pick-up, 102-filter capacitor, 103-comparator, 104-feedback resistor, 11-voltage detection circuit, 111-second relay, 112-fourth resistor, 12-connector power-off protection circuit, 121-self-healing fuse, 122-fifth resistor, 13-electrical connection, 14-device battery.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1:
fig. 1-2 are a schematic circuit diagram of an adapter and a circuit diagram of the adapter provided in the present embodiment, and only the parts related to the embodiment of the present invention are shown for convenience of explanation.
This embodiment provides a power adapter, this power adapter and the electric connector that matches with it can communicate, send feedback signal to the electric connector, and then confirm whether adapter is charging for the equipment that it is adapted with it at present, namely: whether the adapter is the original adapter of the device or not, in this way, the mixed use of the adapter is avoided, the adapter and the battery are protected, and the charging efficiency is ensured.
Referring to fig. 1, fig. 1 is a schematic circuit block diagram of an adapter, where the adapter includes an adapter mcu1, the adapter mcu1 is connected to a signal receiver 2, the signal receiver 2 receives an indication signal from an electrical connector of a device matched with the signal receiver and sends the indication signal to the adapter mcu1, the adapter mcu1 controls a feedback unit 3 to send a feedback signal to the electrical connector of the device, and the electrical connector of the device confirms that the power adapter is an original power adapter after receiving the feedback signal.
Referring to fig. 2, fig. 2 is a circuit diagram of the adapter of this embodiment, the adapter mcu1 is a master control center of the adapter, and it adopts a single chip microcomputer with a model at89c2051, the adapter mcu1 is connected with the basic circuit 4 of the adapter through a first resistor 7, the first resistor 7 is a safety resistor, the adapter mcu1 is protected, and it is prevented that an excessive current passes through the adapter mcu1 and is damaged, and the adapter basic circuit 4 provides working power for the adapter mcu 1.
The signal receiver 2 adopts a wireless communication module, which is a wireless transceiver module with model number nrf 401. The wireless transceiver module can also be replaced by a Bluetooth module or a WiFi module, so that the wireless transceiver module is not limited.
The second resistor 31 is connected with the adapter mcu1, the adapter mcu1 sends a signal to the triode 32, and the triode 32 amplifies the signal and drives the buzzer 33 to sound. The sound signal emitted by the buzzer 33 is fed back to the electrical connector as a feedback signal.
Whether the adapter is the original adapter or not is judged by adopting the mode that the adapter and the electric connector are communicated with each other, but when the adapter is carelessly charged for other equipment at some times, potential safety hazards obviously exist, and the precursors of the potential safety hazards generally mean that the temperature of the adapter rises, so when the temperature of the adapter rises to exceed a limited value, if the charging can be stopped in time, accidents can be avoided, and therefore the adapter provided by the scheme is further provided with a temperature detection circuit 5 and an adapter power-off protection circuit 6.
The temperature detection circuit 5 includes a third resistor 51 and a temperature sensor 52 connected to the third resistor 51. The temperature sensor 52 is a digital temperature sensor of type ds18b 20.
The third resistor 51 is electrically connected with the adapter mcu1, the temperature sensor 52 detects the temperature of the adapter and sends a temperature signal to the adapter mcu1, and the adapter mcu1 starts the adapter power-off protection circuit 6 after the temperature exceeds a preset threshold value.
The adapter power-off protection circuit 6 is connected with the adapter mcu1, and the adapter mcu1 sends an indication signal to the adapter power-off protection circuit 6 to control the connection and disconnection of the adapter power-off protection circuit 6.
The adapter power-off protection circuit 6 includes a first relay 61, a fourth resistor 62, and a light emitting diode 63, the fourth resistor 62 and the light emitting diode 63 are connected in series, and the first relay 61 is connected in parallel with a series circuit of the fourth resistor 62 and the light emitting diode 63. The first relay 61 and the fourth resistor 62 are both connected in series with the adapter mcu 1.
The first relay 61 may also be replaced by an electronic switch such as a high-frequency duty ratio electronic switch or a self-recovery fuse, and therefore the replacement scheme also belongs to the protection scope of the present invention.
Under the normal state, the first relay 61 is in a conducting state, the light emitting diode 63 stably emits light, the adapter charges the equipment, when the temperature sensor 52 detects that the temperature of the adapter rises, the adapter mcu1 controls the first relay 61 to be disconnected, the equipment is stopped to be charged, meanwhile, the adapter mcu1 controls the light emitting diode 63 to flicker, a user is informed of charging abnormity, and the user is requested to stop charging in time.
Example 2:
fig. 3-4 illustrate an electrical connector of this embodiment that mates with the power adapter of embodiment 1.
Referring to fig. 3, fig. 3 is a schematic block diagram of an electrical connector circuit according to the present invention, the electrical connector includes an electrical connection terminal 13, an input terminal of the electrical connection terminal 13 is connected to an output terminal of the adapter base circuit 4 when in use, an output terminal of the electrical connection terminal 13 is connected to an electrical connector mcu8, the electrical connector mcu8 is connected to a signal sending module 9, the electrical connector mcu8 sends an indication signal to the adapter mcu1 through the signal sending module 9, the adapter mcu1 drives the feedback unit 3 to send a feedback signal only when receiving the indication signal sent by the electrical connector matched with the adapter mcu1, and the electrical connector mcu8 is further connected to a feedback signal receiving circuit 10 for receiving the feedback signal sent by the feedback unit 3.
When the feedback signal receiving circuit 10 receives the feedback signal sent by the mcu1, it is determined that the adapter in use is the original adapter, and when the feedback signal receiving circuit 10 does not receive the feedback signal sent by the mcu1, it indicates that the adapter is not the original adapter, the electric connector mcu8 starts the voltage detection circuit 11 to detect the charging current to determine whether the charging current provided by the adapter is within a safety threshold range, which is: when the current provided by the adapter is close to the charging current provided by the original adapter of the device being charged, the charging is relatively safe, and if the charging current exceeds a safe threshold value, the electric connector mcu8 starts the electric connector power-off protection circuit 12 to stop the charging.
Referring to fig. 4, fig. 4 is a schematic diagram of a circuit structure of an electrical connector according to the present invention, the electrical connector mcu8 is a control center of the electrical connector, and the electrical connector mcu8 adopts a single chip microcomputer with a model at89c2051, the adapter provides working power for the electrical connector mcu8, the electrical connector mcu8 is connected to the signal sending module 9, the signal sending module 9 is a wireless transceiver module with a model nrf401, and the electrical connector mcu8 sends a specific indication signal to the adapter through the signal sending module 9.
The feedback signal receiving circuit 10 includes a sound pickup 101, a filter capacitor 102, and a comparator 103, which are connected in this order.
The sound pickup 101 picks up a sound signal emitted by the buzzer 33, the filter capacitor 102 performs filtering processing on the sound signal, and the comparator 103 and the feedback resistor 104 form a hysteresis comparator which has strong anti-jamming capability and is more favorable for accurate identification of the signal. The output terminal of the comparator 103 is connected to the electrical connector mcu8, and sends an audio signal to the electrical connector mcu8, and the electrical connector mcu8 confirms that the adapter is the original adapter after receiving the audio signal.
The connector power-off protection circuit 12 includes a self-healing fuse 121 and a fifth resistor 122, one end of the self-healing fuse 121 is connected to the electrical connector mcu8, the other end is connected to the fifth resistor 122, and the other end of the fifth resistor 122 is connected to the device battery 14.
The voltage detection circuit 11 includes a second relay 111, and a fourth resistor 112 connected in series with the second relay 111, the fourth resistor 112 is connected to the electrical connector mcu8 to protect the second relay 111 as a protection resistor, and the second relay 111 is further connected to an output terminal of the fifth resistor 122.
When the electrical connector mcu8 controls the second relay 111 to close, the output voltage of the fifth resistor 122, i.e. the charging voltage, can be detected, and then the electrical connector mcu8 compares and determines the voltage to see whether it exceeds the safety threshold.
If the charging voltage exceeds the safety threshold, the electrical connector mcu8 controls the self-recovery fuse 121 to disconnect the charging circuit, so as to stop charging and prevent accidents.
The electric connector provided by the invention can be directly applied to equipment without sound collection, wireless communication function and control function, for the equipment with sound collection, wireless communication function and control function, for example: the mobile phone only needs to reserve the protection circuit and the detection circuit.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (3)
1. The utility model provides a power adapter, includes vary voltage circuit and rectifier circuit, its characterized in that: the adapter further comprises a signal receiver (2), wherein the signal receiver (2) receives an indication signal from an electric connector matched with the signal receiver and sends the indication signal to the adapter mcu (1); the adapter mcu (1) controls the feedback unit (3) to send a feedback signal to the electric connector; the electric connector confirms that the power adapter is the original power adapter after receiving the feedback signal, and the electric connector further comprises an adapter temperature detection circuit (5); the adapter temperature detection circuit (5) is connected with the adapter mcu (1) and sends a temperature signal to the adapter mcu (1); the adapter mcu (1) starts an adapter power-off protection circuit (6) when the temperature signal exceeds a safety threshold, wherein the adapter power-off protection circuit (6) comprises a first relay (61), a fourth resistor (62) and a light-emitting diode (63); the fourth resistor (62) and the light emitting diode (63) are connected in series; the first relay (61) is connected in parallel with a series circuit consisting of a fourth resistor (62) and a light-emitting diode (63); the first relay (61) and the fourth resistor (62) are connected with the adapter mcu (1), and the signal receiver (2) is a wireless communication module; the adapter mcu (1) drives a sound signal emitted by the sound generating unit to be sent to an electric connector as a feedback signal, and the electric connector comprises a signal sending module (9) and a feedback signal receiving circuit (10); the signal sending module (9) sends an indication signal to the power adapter; the feedback signal receiving circuit (10) receives a feedback signal sent by the power adapter and sends the feedback signal to the electric connector mcu (8); the electric connector mcu (8) judges whether a voltage detection circuit (11) needs to be started according to whether a feedback signal is received or not, and the feedback signal receiving circuit (10) comprises a sound pickup (101), a filter capacitor (102) and a comparator (103) which are connected in sequence; the sound pickup (101) picks up sound signals emitted by the sound emitting unit; the filter capacitor (102) carries out filter processing on the sound signal; the comparator (103) and the feedback resistor (104) are connected to form a hysteresis comparator.
2. The power adapter as claimed in claim 1, wherein: also includes an electrical connector power-off protection circuit (12); the electrical connector power-off protection circuit (12) comprises a self-restoring fuse (121); one end of the self-recovery fuse (121) is connected with the electric connector mcu (8), and the other end of the self-recovery fuse is connected with the fifth resistor (122); the other end of the fifth resistor (122) is connected with the equipment battery (14).
3. The power adapter as claimed in claim 2, wherein: the voltage detection circuit (11) comprises a second relay (111) and a fourth resistor (112) connected with the second relay (111) in series; the fourth resistor (112) is connected with the electric connector mcu (8) and used as a protection resistor to protect the second relay (111); the second relay (111) is connected with the output end of the fifth resistor (122).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010345500.4A CN111478136B (en) | 2020-04-27 | 2020-04-27 | Power adapter and electric connector thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010345500.4A CN111478136B (en) | 2020-04-27 | 2020-04-27 | Power adapter and electric connector thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111478136A CN111478136A (en) | 2020-07-31 |
| CN111478136B true CN111478136B (en) | 2021-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010345500.4A Active CN111478136B (en) | 2020-04-27 | 2020-04-27 | Power adapter and electric connector thereof |
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| Country | Link |
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| CN (1) | CN111478136B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595094A (en) * | 2013-10-31 | 2014-02-19 | 徐州市恒源电器有限公司 | Electric tool wireless charging device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133258C (en) * | 2000-07-29 | 2003-12-31 | 深圳市中兴通讯股份有限公司 | Charging method for handset and its intelligent integrated charging device |
| US8478913B2 (en) * | 2011-11-30 | 2013-07-02 | Apple Inc. | Adapter for electronic devices |
| CN106300501B (en) * | 2016-07-26 | 2019-02-12 | Oppo广东移动通信有限公司 | A kind of adapter recognition methods and intelligent mobile terminal |
| US10096951B1 (en) * | 2017-09-20 | 2018-10-09 | Global Tel*Link Corporation | Contraband detection through smart power components |
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2020
- 2020-04-27 CN CN202010345500.4A patent/CN111478136B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595094A (en) * | 2013-10-31 | 2014-02-19 | 徐州市恒源电器有限公司 | Electric tool wireless charging device |
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| CN111478136A (en) | 2020-07-31 |
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