CN216979775U - NFC circuit of electric motor car instrument - Google Patents
NFC circuit of electric motor car instrument Download PDFInfo
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- CN216979775U CN216979775U CN202220650784.2U CN202220650784U CN216979775U CN 216979775 U CN216979775 U CN 216979775U CN 202220650784 U CN202220650784 U CN 202220650784U CN 216979775 U CN216979775 U CN 216979775U
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Abstract
The utility model discloses an NFC circuit of an electric vehicle instrument, which comprises: the power supply circuit is used for providing power; the NFC switch circuit is respectively and electrically connected with the electric door lock switch circuit and the display circuit and is used for acquiring relevant information of external NFC equipment or burning the relevant information to the external NFC equipment; the electric door lock switching circuit is respectively and electrically connected with the NFC switching circuit and the display circuit, and is used for acquiring relevant information of the NFC switching circuit and then controlling the electric vehicle and the display circuit to be switched on or off; the display circuit is used for displaying pictures or animations to guide user operation. Through this NFC circuit, the user no longer need carry the physical key, carry convenient NFC card or support equipment such as NFC's cell-phone can, it is more convenient to use, can further guide the user through the display circuit, reinforcing human-computer interaction's experience.
Description
Technical Field
The utility model belongs to the technical field of electric vehicles, and relates to a two-wheeled electric vehicle or a three-wheeled electric vehicle, in particular to an NFC circuit of an electric vehicle instrument.
Background
The two-wheeled electric vehicle has very high popularization rate as one of the main tools of riding instead of walk in our country, and the two-wheeled electric vehicle on the market is mostly unlocked by the traditional physical key at present, and although the unlocking mode has simple structure and low cost, the defect that the two-wheeled electric vehicle is easy to lose and copy is also existed, so that the property safety of the user is threatened. On the other hand, most of the existing instruments are nixie tube instruments, STN single-color instruments and negative display liquid crystal instruments, the display function is single, and meanwhile, the NFC card lacks a guide function when being copied, so that the learning cost is too high for a user, and the human-computer interaction experience is lacked.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an NFC circuit of an electric vehicle instrument.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
the utility model discloses an NFC circuit of an electric vehicle instrument, which comprises:
the power supply circuit is used for providing power;
the NFC switch circuit is respectively and electrically connected with the electric door lock switch circuit and the display circuit and is used for acquiring relevant information of external NFC equipment or burning the relevant information to the external NFC equipment;
the electric door lock switching circuit is respectively and electrically connected with the NFC switching circuit and the display circuit, and the electric door lock switching circuit is used for acquiring related information of the NFC switching circuit and then controlling the electric vehicle and the display circuit to be switched on or off;
and the display circuit is used for displaying pictures or animations to guide the user to operate.
The utility model discloses an NFC circuit of an electric vehicle instrument, which comprises: the NFC circuit controls the electric vehicle and the display circuit to be switched on or off through the NFC switching circuit and the electric door lock switching circuit.
The user no longer need carry the physical key, carry equipment such as convenient NFC card or support NFC's cell-phone can, it is more convenient to use, can further guide the user through the display circuit, reinforcing human-computer interaction's experience.
On the basis of the technical scheme, the following improvements can be made:
preferably, the method further comprises the following steps: and the input end of the power supply adjusting circuit is electrically connected with the output end of the power supply circuit, the output end of the power supply adjusting circuit is electrically connected with the input end of the NFC switching circuit, and the power supply adjusting circuit is used for adjusting the power supply voltage provided by the power supply circuit to the working voltage of the NFC switching circuit.
By adopting the preferable scheme, the power supply adjusting circuit can adjust the power supply voltage provided by the power supply circuit into the working voltage of the NFC switching circuit.
Preferably, the power supply adjustment circuit includes:
the input end of the first power supply chip is electrically connected with the output end of the power supply circuit, and the first power supply chip is used for carrying out primary voltage reduction on power supply voltage provided by the power supply circuit;
the input end of the filter chip is electrically connected with the output end of the first power supply chip, and the filter chip is used for filtering the power supply voltage subjected to primary voltage reduction by the first power supply chip;
and the input end of the second power supply chip is electrically connected with the output end of the filtering chip, the output end of the second power supply chip is electrically connected with the input end of the NFC switching circuit, and the second power supply chip is used for carrying out secondary voltage reduction on the power supply voltage filtered by the filtering chip.
With the above preferred aspect, the power supply adjustment circuit includes: first power chip, filtering chip and second power chip, circuit structure is simple, and is with low costs, can effectively step down and filter the mains voltage that power supply circuit provided, and divide twice step down, and the voltage performance that obtains at last is more stable.
Preferably, the NFC switch circuit includes:
the NFC induction chip is used for acquiring relevant information of external NFC equipment or burning the relevant information to the external NFC equipment;
NFC control chip, NFC control chip's input is connected with NFC response chip electricity, and its output is connected with switch circuit and display circuit electricity respectively, and NFC control chip is used for controlling switching circuit and display circuit's switching on or closing.
With the above preferred scheme, the NFC switching circuit includes: NFC response chip and NFC control chip, circuit structure is simple, and is with low costs.
As the preferred scheme, the NFC control chip is an 8-bit singlechip with a plurality of ports.
By adopting the preferable scheme, the NFC control chip is low in cost and easy to purchase.
Preferably, the electric door lock switch circuit includes: the device comprises a first resistor, a second resistor, a third resistor, a fourth resistor, an NPN triode and a PMOS (P-channel metal oxide semiconductor) tube;
one end of the first resistor is electrically connected with the NFC control chip, and the other end of the first resistor is electrically connected with the second resistor and the base electrode of the NPN triode respectively;
one end of the second resistor is electrically connected with the first resistor and the base electrode of the NPN triode respectively, and the other end of the second resistor is electrically connected with the emitting electrode of the NPN triode and grounded;
one end of the third resistor is electrically connected with the collector of the NPN triode, and the other end of the third resistor is electrically connected with the fourth resistor and the grid of the PMOS tube respectively;
one end of the fourth resistor is electrically connected with the third resistor and the grid electrode of the PMOS tube respectively, and the other end of the fourth resistor is electrically connected with the drain electrode of the PMOS tube and the output end of the power supply circuit;
the base electrode of the NPN triode is respectively electrically connected with the first resistor and the second resistor, the emitter electrode of the NPN triode is electrically connected with the second resistor and is grounded, and the collector electrode of the NPN triode is electrically connected with the third resistor;
the grid electrode of the PMOS tube is respectively electrically connected with the third resistor and the fourth resistor, the drain electrode of the PMOS tube is electrically connected with the fourth resistor and the output end of the power supply circuit, and the source electrode of the PMOS tube is electrically connected with the input end of the display circuit.
Adopt above-mentioned preferred scheme, electric door lock switch circuit includes: the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, an NPN triode and a PMOS tube, and is simple in structure and stable in performance.
Preferably, the display circuit includes: the instrument comprises an instrument power supply, an instrument main control chip and a display screen;
the input end of the instrument power supply is electrically connected with the output end of the electric door lock switching circuit, the output end of the instrument power supply is electrically connected with the instrument main control chip and the display screen respectively, and the instrument power supply is used for adjusting the power supply voltage provided by the power supply circuit into the working voltage of the instrument main control chip and the display screen;
the input end of the instrument main control chip is electrically connected with the NFC control chip, the output end of the instrument main control chip is electrically connected with the display screen, and the instrument main control chip is used for controlling the display screen to work.
With the above preferred aspect, the display circuit includes: the instrument power supply, the instrument main control chip and the display screen are simple in circuit structure and stable in performance.
Preferably, the power supply circuit includes: the electric vehicle is internally provided with a battery.
By adopting the preferable scheme, the built-in battery of the electric vehicle is directly adopted as the power supply source, and the original electric vehicle is not required to be greatly reformed.
Preferably, the built-in battery of the electric vehicle outputs 48-72V voltage.
With the preferred arrangement described above, the voltage is appropriate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a circuit block diagram of an NFC circuit according to an embodiment of the present invention.
Fig. 2 is a circuit block diagram of a power supply adjusting circuit according to an embodiment of the utility model.
Fig. 3 is a specific circuit diagram of the electric door lock switch circuit according to the embodiment of the present invention.
Fig. 4 is a second circuit block diagram of the NFC circuit according to the second embodiment of the present invention.
Wherein: the NFC switch control circuit comprises a power supply circuit 1, a NFC switch circuit 2, an NFC induction chip 21, an NFC control chip 22, an electric door lock switch circuit 3, a display circuit 4, an instrument power supply 41, an instrument main control chip 42, a display screen 43, a power supply adjusting circuit 5, a first power supply chip 51, a second power supply chip 52 and a filter chip 53.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Meanwhile, the expressions "first", "second", etc. are used only for the purpose of distinguishing a plurality of configurations, and do not limit the order between the configurations or other features.
Also, the expression "comprising" an element is an expression of "open" which merely means that there is a corresponding component, and should not be interpreted as excluding additional components.
In order to achieve the object of the present invention, in some embodiments of an NFC circuit of an electric vehicle meter, as shown in fig. 1, the NFC circuit includes: power supply circuit 1, NFC switch circuit 2, electric door lock switch circuit 3 and display circuit 4.
The power supply circuit 1 is used for supplying power; the NFC switch circuit 2 is respectively and electrically connected with the electric door lock switch circuit 3 and the display circuit 4, and the NFC switch circuit 2 is used for acquiring relevant information of external NFC equipment or burning the relevant information to the external NFC equipment; the electric door lock switch circuit 3 is respectively and electrically connected with the NFC switch circuit 2 and the display circuit 4, and the electric door lock switch circuit 3 is used for controlling the electric vehicle and the display circuit 4 to be switched on or off after acquiring relevant information of the NFC switch circuit 2; the display circuit 4 is used for displaying pictures or animations to guide the user to operate.
It is noted that, in some embodiments, the power supply circuit 1 includes: the built-in battery of the electric vehicle directly adopts the built-in battery of the electric vehicle as a power supply source, the original electric vehicle does not need to be greatly improved, and the built-in battery of the electric vehicle outputs 48-72V voltage.
The utility model discloses an NFC circuit of an electric vehicle instrument, which comprises: the NFC circuit controls the electric vehicle and the display circuit 4 to be switched on or off through the NFC switch circuit 2 and the electric door lock switch circuit 3.
The user no longer need carry the physical key, carry equipment such as convenient NFC card or support NFC's cell-phone can, it is more convenient to use, can further guide the user through display circuit 4, reinforcing human-computer interaction's experience.
In order to further optimize the implementation effect of the present invention, in other embodiments, the remaining features are the same, except that: and the input end of the power supply adjusting circuit 5 is electrically connected with the output end of the power supply circuit 1, the output end of the power supply adjusting circuit is electrically connected with the input end of the NFC switch circuit 2, and the power supply adjusting circuit 5 is used for adjusting the power supply voltage provided by the power supply circuit 1 to the working voltage of the NFC switch circuit 2.
With the above embodiment, the power supply adjusting circuit 5 can adjust the power supply voltage provided by the power supply circuit 1 to the operating voltage of the NFC switch circuit 2.
Further, on the basis of the above embodiment, as shown in fig. 2, the power supply adjusting circuit 5 includes:
the input end of the first power supply chip 51 is electrically connected with the output end of the power supply circuit 1, and the first power supply chip 51 is used for carrying out primary voltage reduction on the power supply voltage provided by the power supply circuit 1;
the input end of the filter chip 53 is electrically connected with the output end of the first power supply chip 51, and the filter chip 53 is used for filtering the power supply voltage subjected to primary voltage reduction by the first power supply chip 51;
an input end of the second power supply chip 52 is electrically connected with an output end of the filter chip 53, an output end of the second power supply chip 52 is electrically connected with an input end of the NFC switch circuit 2, and the second power supply chip 52 is used for performing secondary voltage reduction on the power supply voltage filtered by the filter chip 53.
With the above embodiment, the power supply adjustment circuit 5 has the following beneficial effects: first power supply chip 51, filtering chip 53 and second power supply chip 52, circuit structure is simple, and is with low costs, can effectively carry out step-down and filtering with the mains voltage that power supply circuit 1 provided, and divide twice step-down, and the voltage performance that obtains at last is more stable.
Further, on the basis of the above embodiment, the NFC switch circuit 2 includes:
the NFC sensing chip 21 is used for acquiring relevant information of external NFC equipment or burning the relevant information to the external NFC equipment;
With the above embodiment, the NFC switch circuit 2 has the following beneficial effects: NFC induction chip 21 and NFC control chip 22, circuit structure is simple, and is with low costs.
The NFC control chip 22 is an 8-bit single chip microcomputer with a plurality of ports, and the NFC control chip 22 is low in cost and easy to purchase. The NFC sensing chip 21 may be but is not limited to the NFC sensing chip 21 with the model number RC522, and the NFC sensing chip 21 may acquire information of NFC devices in a hand of a user and may also burn the information into the NFC devices in the hand of the user; the NFC control chip 22 employs an 8-bit single chip, and includes a plurality of ports: NFC response chip 21SPI communication port, electric door lock control port.
Further, on the basis of the above embodiment, as shown in fig. 3, the electric door lock switch circuit 3 includes: the device comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, an NPN triode Q1 and a PMOS (P-channel metal oxide semiconductor) transistor Q2;
one end of the first resistor R1 is electrically connected with the NFC control chip 22, and the other end of the first resistor R1 is electrically connected with the second resistor R2 and the base electrode of the NPN triode Q1 respectively;
one end of the second resistor R2 is electrically connected with the first resistor R1 and the base electrode of the NPN triode Q1 respectively, and the other end of the second resistor R2 is electrically connected with the emitting electrode of the NPN triode Q1 and is grounded;
one end of the third resistor R3 is electrically connected with the collector of the NPN triode, and the other end of the third resistor R3 is respectively electrically connected with the fourth resistor R4 and the grid of the PMOS tube;
one end of the fourth resistor R4 is electrically connected to the third resistor R3 and the gate of the PMOS transistor Q2, respectively, and the other end is electrically connected to the drain of the PMOS transistor Q2 and to the output terminal of the power supply circuit 1;
the base electrode of the NPN triode Q1 is respectively and electrically connected with the first resistor R1 and the second resistor R2, the emitter electrode of the NPN triode Q1 is electrically connected with the second resistor R2, the base electrode of the NPN triode Q1 is grounded, and the collector electrode of the NPN triode Q1 is electrically connected with the third resistor R3;
the gate of the PMOS transistor Q2 is electrically connected to the third resistor R3 and the fourth resistor R4, respectively, the drain thereof is electrically connected to the fourth resistor R4, and is electrically connected to the output terminal of the power supply circuit 1, and the source thereof is electrically connected to the input terminal of the display circuit 4.
With the above embodiment, the electric door lock switch circuit 3 has the following beneficial effects: the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, an NPN triode and a PMOS tube, and is simple in structure and stable in performance.
Further, on the basis of the above-described embodiment, as shown in fig. 4, the display circuit 4 includes: an instrument power supply 41, an instrument main control chip 42 and a display screen 43;
the input end of the instrument power supply 41 is electrically connected with the output end of the electric door lock switch circuit 3, the output end of the instrument power supply 41 is respectively electrically connected with the instrument main control chip 42 and the display screen 43, and the instrument power supply 41 is used for adjusting the power supply voltage provided by the power supply circuit 1 into the working voltages of the instrument main control chip 42 and the display screen 43;
the input end of the instrument main control chip 42 is electrically connected with the NFC control chip 22, the output end of the instrument main control chip is electrically connected with the display screen 43, and the instrument main control chip 42 is used for controlling the display screen 43 to work.
With the above embodiment, the display circuit 4 has the following advantageous effects: the instrument power supply 41, the instrument main control chip 42 and the display screen 43, the circuit structure is simple, and the performance is stable. The display screen 43 may be, but is not limited to, an LCD display screen 43.
The various embodiments above may be implemented in cross-parallel.
Specifically, in some embodiments, the positive electrode of the power supply circuit 1 outputs a voltage of 48 to 72V, the voltage is reduced to a voltage of 5V by the first power chip 51, and after being filtered by the filter capacitor of the filter chip 53, the voltage is output by the second power chip 52 to supply power to the NFC sensing chip 21 and the NFC control chip 22 of the NFC switch circuit 2.
The instrument power supply 41 converts the power supply voltage provided by the power supply circuit 1 into 5V and 3.3V voltages required by the instrument main control chip 42 and the display screen 43 after the electric door lock switch circuit 3 is switched on; the electric door lock switch circuit 3 is conducted to the instrument main control chip 42 for starting; the instrument main control chip 42 controls the display content of the display screen 43, after the instrument is started, the display screen 43 enters an instrument main interface after playing boot animation, and after receiving an instruction of copying the NFC card, a user is displayed to guide and enter an NFC card copying mode.
In some embodiments, the work flow of the NFC circuit is as follows:
when the electric motor car is in the power-off state and the battery is normal, NFC switch circuit 2 is in operating condition, is close to instrument NFC antenna position with outside NFC equipment, and NFC response chip 21 acquires outside NFC equipment's relevant information and transmits extremely NFC control chip 22 verifies and switches on after succeeding in NFC control chip 22 control switch circuit 3, and the electric motor car starts, and the instrument is gone up the electricity, and display circuit 4 works and gets into the instrument main interface behind the broadcast start animation.
When the electric motor car is in the on state like this, NFC switch circuit 2 is in operating condition, reads outside NFC equipment and verifies the success back, and NFC control chip 22 control switch circuit 3 disconnection of electric door lock, and the electric wheel car is closed, and the instrument cuts off the power supply, and display circuit 4 closes.
In the power-on state, after the user inputs an instruction to copy the NFC card, the NFC switch circuit 2 enters the copy state, and the display screen 43 may display a user copy method guidance interface.
The utility model does not need to carry a physical key any more, and only needs to carry a convenient NFC card or a mobile phone supporting NFC and other equipment, so that the use is more convenient, the NFC switching circuit 2 is used for switching on and off, the display screen 43 displays the on and off animation, and meanwhile, the display screen 43 can guide the user more specifically when the user copies the NFC card, so that the man-machine interaction experience is enhanced, and the brand of a car factory is convenient to publicize.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like are used in the orientations and positional relationships indicated in the drawings only for the convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
While there have been shown and described what are at present considered to be the fundamental principles of the utility model and its essential features and advantages, it will be understood by those skilled in the art that the utility model is not limited by the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.
The control mode of the utility model is controlled by manually starting and closing the switch, the wiring diagram of the power element and the supply of the power source belong to the common knowledge in the field, and the utility model is mainly used for protecting mechanical devices, so the control mode and the wiring arrangement are not explained in detail in the utility model.
Claims (9)
1. An NFC circuit for an electric vehicle meter, comprising:
a power supply circuit for providing power;
the NFC switch circuit is respectively and electrically connected with the electric door lock switch circuit and the display circuit and is used for acquiring relevant information of external NFC equipment or burning the relevant information to the external NFC equipment;
the electric door lock switching circuit is respectively and electrically connected with the NFC switching circuit and the display circuit, and is used for acquiring relevant information of the NFC switching circuit and then controlling the electric vehicle and the display circuit to be switched on or off;
and the display circuit is used for displaying pictures or animations to guide user operation.
2. The NFC circuit of claim 1, further comprising: and the input end of the power supply adjusting circuit is electrically connected with the output end of the power supply circuit, the output end of the power supply adjusting circuit is electrically connected with the input end of the NFC switch circuit, and the power supply adjusting circuit is used for adjusting the power supply voltage provided by the power supply circuit into the working voltage of the NFC switch circuit.
3. The NFC circuit of claim 2, wherein the power adjustment circuit comprises:
the input end of the first power supply chip is electrically connected with the output end of the power supply circuit, and the first power supply chip is used for carrying out primary voltage reduction on power supply voltage provided by the power supply circuit;
the input end of the filter chip is electrically connected with the output end of the first power supply chip, and the filter chip is used for filtering the power supply voltage subjected to primary voltage reduction by the first power supply chip;
and the input end of the second power supply chip is electrically connected with the output end of the filter chip, the output end of the second power supply chip is electrically connected with the input end of the NFC switching circuit, and the second power supply chip is used for carrying out secondary voltage reduction on the power supply voltage filtered by the filter chip.
4. NFC circuit according to any one of claims 1 to 3, characterised in that the NFC switching circuit comprises:
the NFC induction chip is used for acquiring relevant information of external NFC equipment or burning the relevant information to the external NFC equipment;
the NFC control chip, NFC control chip's input with NFC response chip electricity is connected, its output respectively with electric lock switch circuit and display circuit electricity are connected, NFC control chip is used for controlling switching on or closing of electric lock switch circuit and display circuit.
5. The NFC circuit of claim 4, wherein the NFC control chip is an 8-bit single chip with multiple ports.
6. The NFC circuit of claim 4, wherein the electric door lock switch circuit comprises: the device comprises a first resistor, a second resistor, a third resistor, a fourth resistor, an NPN triode and a PMOS (P-channel metal oxide semiconductor) tube;
one end of the first resistor is electrically connected with the NFC control chip, and the other end of the first resistor is electrically connected with the second resistor and the base electrode of the NPN triode respectively;
one end of the second resistor is electrically connected with the first resistor and the base electrode of the NPN triode respectively, and the other end of the second resistor is electrically connected with the emitting electrode of the NPN triode and grounded;
one end of the third resistor is electrically connected with the collector of the NPN triode, and the other end of the third resistor is electrically connected with the fourth resistor and the grid of the PMOS tube respectively;
one end of the fourth resistor is electrically connected with the third resistor and the grid electrode of the PMOS tube respectively, and the other end of the fourth resistor is electrically connected with the drain electrode of the PMOS tube and the output end of the power supply circuit;
the base electrode of the NPN triode is respectively electrically connected with the first resistor and the second resistor, the emitter electrode of the NPN triode is electrically connected with the second resistor and is grounded, and the collector electrode of the NPN triode is electrically connected with the third resistor;
the grid electrode of the PMOS tube is respectively electrically connected with the third resistor and the fourth resistor, the drain electrode of the PMOS tube is electrically connected with the fourth resistor and the output end of the power supply circuit, and the source electrode of the PMOS tube is electrically connected with the input end of the display circuit.
7. The NFC circuit of claim 4, wherein the display circuit comprises: the instrument comprises an instrument power supply, an instrument main control chip and a display screen;
the input end of the instrument power supply is electrically connected with the output end of the electric door lock switching circuit, the output end of the instrument power supply is electrically connected with the instrument main control chip and the display screen respectively, and the instrument power supply is used for adjusting the power voltage provided by the power supply circuit into the working voltages of the instrument main control chip and the display screen;
the input end of the instrument main control chip is electrically connected with the NFC control chip, the output end of the instrument main control chip is electrically connected with the display screen, and the instrument main control chip is used for controlling the display screen to work.
8. The NFC circuit of claim 1, wherein the power supply circuit comprises: the electric vehicle is internally provided with a battery.
9. The NFC circuit of claim 8, wherein the electric vehicle built-in battery outputs 48-72V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220650784.2U CN216979775U (en) | 2022-03-24 | 2022-03-24 | NFC circuit of electric motor car instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220650784.2U CN216979775U (en) | 2022-03-24 | 2022-03-24 | NFC circuit of electric motor car instrument |
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| Publication Number | Publication Date |
|---|---|
| CN216979775U true CN216979775U (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220650784.2U Active CN216979775U (en) | 2022-03-24 | 2022-03-24 | NFC circuit of electric motor car instrument |
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| CN (1) | CN216979775U (en) |
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- 2022-03-24 CN CN202220650784.2U patent/CN216979775U/en active Active
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