CN105882443B - The stake of electric automobile wireless charging and charger based on electromagnetic force - Google Patents

Abstract

An electric vehicle wireless charging pile and a charger based on electromagnetic force relate to wireless charging technology for electric vehicles. In order to solve the problem that the conventional electric vehicle charging device charges the electric vehicle through a connection cable, which is inconvenient and unsafe. The charging pile of the present invention includes a charging pile controller and a plurality of charging interfaces, the charging interface includes an electromagnet and a telescopic mechanism, the electromagnet is fixed on the telescopic mechanism, and the charging pile controller is used to control the power on and off of the electromagnet. The charger includes a charger body and an inductance coil, and the charger body is used to convert the current generated by the inductance coil into the electric energy required by the electric vehicle. The invention uses the electromagnetic principle to convert electric energy into a magnetic field inside the charging pile, and the change of the magnetic field causes the inductance coil to generate current to achieve the purpose of charging the electric vehicle. The invention does not need to connect cables for charging, which is convenient and safe, and one charging pile can charge multiple electric vehicles at the same time, thereby improving the utilization rate of the charging pile.

Description

Electric vehicle wireless charging pile and charger based on electromagnetic force

technical field

The invention relates to wireless charging technology for electric vehicles.

Background technique

Conventional charging devices for electric vehicles charge electric vehicles through connecting cables, which poses a great potential safety hazard for charging in bad weather (rain, snow, etc.) environments. However, most of today's wireless charging technologies use the principle of electromagnetic induction, and energy transmission is achieved through energy coupling through coils. The charging power is small, and it is not suitable for large-scale electrical equipment such as electric vehicles.

Contents of the invention

The purpose of the present invention is to solve the problem that the conventional electric vehicle charging device charges the electric vehicle through a connection cable, which is inconvenient and unsafe, and provides an electric vehicle wireless charging pile and charger based on electromagnetic force.

The electric vehicle wireless charging pile based on electromagnetic force according to the present invention includes a charging pile controller 2 and a plurality of charging interfaces 1, each charging interface 1 includes an electromagnet and a telescopic mechanism, one end of the telescopic mechanism is fixed, and the electromagnet is fixed. At the other end of the telescopic mechanism, the charging pile controller 2 is used to control the switching on and off of the electromagnet power supply.

The electric vehicle wireless charger based on electromagnetic force that cooperates with the above-mentioned charging pile includes a charger body 3 and an inductance coil 4, and the charger body 3 is used to convert the current generated by the inductance coil 4 into the electric energy required by the electric vehicle.

The electric vehicle wireless charging pile and charger based on electromagnetic force of the present invention uses electromagnetic principles to convert electric energy into a magnetic field inside the charging pile, and the changing magnetic field causes the inductance coil in the charger to generate current, which is then converted by the charger body To meet the electric energy standard required by electric vehicles, to achieve the purpose of charging electric vehicles. The invention does not need to connect cables for charging, which is convenient and safe, and one charging pile can charge multiple electric vehicles at the same time, greatly improving the utilization rate of the charging pile.

Description of drawings

Fig. 1 is a schematic structural diagram of an electric vehicle wireless charging pile based on electromagnetic force according to the present invention;

Fig. 2 is a structural schematic diagram of the electric vehicle wireless charger based on electromagnetic force according to the present invention;

Fig. 3 is a schematic diagram of the reservation principle in Embodiments 3 and 6.

detailed description

Specific Embodiment 1: This embodiment is described with reference to FIG. 1 and FIG. 2. The wireless charging pile for electric vehicles based on electromagnetic force described in this embodiment includes a charging pile controller 2 and a plurality of charging interfaces 1, and each charging interface 1 It includes an electromagnet and a telescopic mechanism, one end of the telescopic mechanism is fixed, the electromagnet is fixed at the other end of the telescopic mechanism, and the charging pile controller 2 is used to control the power on and off of the electromagnet.

The wireless electric vehicle charging pile based on electromagnetic force described in this embodiment needs to cooperate with the wireless electric vehicle charger based on electromagnetic force to charge the electric vehicle. As shown in FIG. 1 and FIG. 2 , the charger includes a charger body 3 and an inductance coil 4 , and the charger body 3 is used to convert the current generated by the inductance coil 4 into electric energy required by the electric vehicle. The charger is installed on the electric vehicle. The charging pile is similar to the fuel dispenser at the gas station. It can be fixed on the ground or embedded in the wall. A charging station is set up at intervals on the road or on the road. Each charging station includes several Charging piles, each charging pile can charge multiple electric vehicles at the same time, and the power supply of the electromagnet adopts alternating current. When charging, drive the electric vehicle near a certain charging pile, pull the telescopic mechanism, so that the iron core of the electromagnet is close to the coil of the charger on the electric vehicle. Press the "Start Charging" button on the charging pile controller 2. At this time, the power of the electromagnet is turned on, and the electromagnet generates a magnetic field. Since the power supply of the electromagnet is alternating current, the generated magnetic field is constantly changing. The magnetic flux of the inductance coil 4 is also constantly changing, so that the inductance coil 4 generates a current, and the current flows through the charger body 3 and is converted into electric energy usable by the electric vehicle and stored. After charging is completed, press the "stop charging" button on the charging pile controller 2, and the electromagnet and linear motion mechanism will stop working.

Specific Embodiment 2: This embodiment is a further limitation of the electromagnetic force-based electric vehicle wireless charging pile described in Embodiment 1. In this embodiment, the charging interface 1 further includes a wireless receiving module, and the wireless receiving The module is used to receive the electric energy data and the charging threshold value sent by the electric vehicle, and send the electric energy data and the charging threshold value to the charging pile controller 2, and the electric energy control module is embedded in the charging pile controller 2, and the electric energy control module is used to judge the electric vehicle Check whether the incoming power data reaches the threshold, and stop charging when the threshold is reached.

In this embodiment, a power control module implemented by software is embedded in the charging pile controller 2, and a wireless transmission module is installed inside the electric vehicle. The charging threshold should be less than or equal to the upper limit of the electric vehicle's ability to store electric energy. After the charging starts, the wireless transmitting module will continuously send out the charging threshold and the real-time electric energy data stored in the electric vehicle. When the power data reaches the charging threshold, charging will stop immediately. Cooperating with the wireless receiving module and the power control module, it can not only automatically stop charging, prevent overcharging from damaging the electric vehicle, but also provide convenience for charging. The charging amount can be calculated according to the initial power data and threshold value received by the charging pile controller 2. How much, and then determine the amount charged. In this embodiment, the receiving range of the wireless receiving module should be limited to ensure that the data received by each wireless receiving module is the data sent by the electric vehicle corresponding to the charging interface 1 where it is located.

Specific Embodiment 3: This embodiment is described with reference to FIGS. 1 to 3. This embodiment is a further limitation of the electromagnetic force-based wireless charging pile for electric vehicles described in Embodiments 1 and 2. In this embodiment, the described The charging pile controller 2 also embeds a reservation module, and the reservation module includes the following units:

The remaining charging time calculation unit: according to the real-time power data received by each working charging interface 1 and the threshold value set by the user, calculate the remaining charging time of the charging interface 1 in real time;

State sending unit: continuously send the working state of each charging interface 1;

Location sending unit: constantly sending the location information of the charging pile;

Reservation information receiving unit: continuously receive reservation information from electric vehicles.

Because the charging of electric vehicles is divided into two types: fast charging and slow charging, fast charging can fill 70-80% in half an hour, but the charging current is extremely large, which will damage the battery. Therefore, most users will choose slow charging, which is usually fully charged in 7 to 8 hours. Therefore, charging piles near expressways can be installed in hotels or hotels where accommodation can be provided. Due to the long charging time of slow charging, when the user arrives at a charging pile, if all the charging ports 1 of the charging pile are in use, the user may have to wait for a long time before charging can start.

As shown in Figure 3, the reservation principle is shown. The charging pile controller 2 continuously receives the reservation signal from the electric vehicle, and at the same time continuously sends the working status of each charging interface 1 to the outside world. The working status of the charging interface 1 that is currently idle and not reserved is "idle, no reservation"; the working status of the charging interface 1 that is currently idle but has a reservation task is the remaining idle time, that is, the expected starting time is the same as the current The time difference of the moment; the working state of the charging interface 1 that is charging and still has a scheduled task after the end of this charging is the remaining charging time and the estimated idle time. The estimated idle time refers to the estimated start time of the next charge and the current charge The time difference of the estimated end time of the charging interface 1 that is charging and has no scheduled tasks after the end of this charging is the remaining charging time. For example, a charging pile includes four charging interfaces 1 A, B, C, and D. Among them, charging interface 1A is currently idle and has not been reserved; charging interface 1B has been reserved and starts working half an hour after the reservation, but The charging port 1 is currently idle; the charging port 1C is charging, and it is expected to complete charging in 20 minutes, and there are no other scheduled tasks; the charging port 1D is charging, and it is expected to complete charging in 10 minutes, and there are unstarted scheduled tasks , the content of the reservation task is to start charging after 1 hour of reservation. Then the content sent by the charging pile controller 2 to the outside world is:

Charging port 1A: free, not reserved;

Charging interface 1B: idle, start working after 30 minutes;

Charging interface 1C: in use, need to wait for 20 minutes;

Charging interface 1D: In use, you need to wait for 10 minutes, and the estimated idle time is 50 minutes.

According to the location information received from each charging pile and the working status information of each charging interface 1, the electric vehicle selects the appropriate charging pile and charging interface 1, and then sends reservation information to the charging pile, including the reserved charging interface 1 number and Start charging time. A confirmation unit can also be added to send confirmation information to the electric vehicle after receiving the reservation information from the electric vehicle, indicating that the charging pile has received the reservation information, and the electric vehicle indicates that the reservation is successful after receiving the confirmation information.

The reservation function provided by this embodiment can enable users to search for charging piles purposefully, reserve a certain charging interface 1 according to the usage of each charging pile, and avoid long-term waiting.

Specific Embodiment 4: This embodiment is described in conjunction with FIG. 2 . The electric vehicle wireless charger based on electromagnetic force described in this embodiment includes a charger body 3 and an inductance coil 4. The charger body 3 is used to use the inductance coil 4 The generated current is converted into the electrical energy required by the electric vehicle.

Embodiment 5: This embodiment is described in conjunction with FIG. 2. This embodiment is a further limitation of the electromagnetic force-based electric vehicle wireless charger described in Embodiment 4. In this embodiment, the charger also includes wireless transmission Module and charger controller 5, the charger controller 5 is used to set the charging threshold, and the wireless sending module is used to send out the charging threshold and the electric energy data stored by the electric vehicle in real time.

Specific Embodiment 6: This embodiment is described with reference to FIG. 1 to FIG. 3. This embodiment is a further limitation of the wireless charger for electric vehicles based on electromagnetic force described in Embodiment 5. In this embodiment, the charger controls The device 5 embeds a search module, and the search module includes the following units:

Electric energy detection unit: detect the remaining electric energy of the electric vehicle in real time;

Remaining kilometers calculation unit: calculate the remaining kilometers according to the remaining electric energy and current speed of the electric vehicle, and the remaining kilometers refer to the distance that the remaining electric energy can support under the premise of continuing to drive at the current speed;

Data receiving unit: continuously receive the location information sent by each charging pile and the working status of each charging interface 1;

Charging pile search unit: According to the location information sent by each charging pile, search for the location of each charging pile on the electronic map, display the distance between each charging pile and the nearest walking route of the electric vehicle, and sort the distance from near to far Number the charging piles in sequence, mark the charging piles whose distance is less than the remaining kilometers in red, and mark the charging piles whose distance is greater than or equal to the remaining kilometers in blue;

Arrival time calculation unit: Calculate the time required to reach each charging pile according to the current vehicle speed, and this time is the arrival time;

Charging time estimated value calculation unit: Calculate the remaining electric energy when reaching each red charging pile according to the power consumption per kilometer at the current vehicle speed, and then calculate the estimated charging time according to the rated charging current according to the remaining electric energy and charging threshold;

The estimated charging end time calculation unit: according to the estimated charging time and the working state of each charging interface 1 of each red charging pile, calculate the estimated charging end time of charging with each charging interface 1 of each red charging pile;

Charging interface 1 sorting unit: Arrange and display all charging interfaces 1 of all red charging piles in ascending order according to the estimated charging end time. The numbers are arranged from small to large;

Charging interface 1 booking unit: receive the number of the charging pile selected by the user and the charging interface 1 number of the charging pile, and send reservation information to the charging pile, the reservation information includes the charging interface 1 number of the charging pile, The arrival time of the pile and the corresponding charging time estimate.

In this embodiment, the remaining kilometers are calculated from the remaining electric energy of the electric vehicle and the current speed of the vehicle. Since the power consumption per kilometer is different at different speeds, the user needs to set the power consumption per kilometer at different speeds based on experience. , and then calculate the electric energy required to reach each charging pile according to the electric power consumption per kilometer at the current vehicle speed, and then obtain the remaining electric energy when reaching each charging pile. Due to the different working status of each charging interface 1 of each charging pile, some charging interfaces 1 are currently idle and have not been reserved, and can start charging immediately after arriving, while some charging interfaces 1 are charging and need to wait after arriving For a certain period of time, although the charging interface 1 is currently idle, it has been booked to start working after a certain period of time, so the charging interface 1 with different working states starts charging at different times, and when it arrives at different charging piles The remaining electric energy is also different, so the time to complete charging with each charging pile and each charging interface 1 is also different. It is necessary to comprehensively sort the charging piles and charging interfaces 1 based on the above various factors. The estimated value of the charging end time is equal to the start time of charging plus the estimated value of the charging time. The sorting rule is to sort the estimated value of the charging end time from small to large. The charging ports 1 are sorted according to the distance from near to far. For example, there are two charging piles marked in red: No. 1 charging pile and No. 2 charging pile. The estimated charging end time of the No. 1 interface of the No. 1 charging pile is 8 hours, and the charging end time of the No. 2 interface of the No. 1 charging pile The estimated value is 7 hours, the estimated value of the charging end time of the No. 1 interface of the No. 2 charging pile is 7 hours, and the estimated charging end time of the No. 2 interface of the No. 2 charging pile is 9 hours, then the order is:

① No. 2 interface of No. 1 charging pile;

② No. 1 interface of No. 2 charging pile;

③ No. 1 interface of No. 1 charging pile;

④The No. 2 interface of the No. 2 charging pile.

While displaying the sorting results, the arrival time of each charging interface 1 , the waiting time and the estimated time for charging completion (that is, the estimated value of charging time) can also be displayed.

It is also possible to add a confirmation information receiving unit. When the reservation information is sent, the charging pile that receives the reservation information will send back a confirmation information, indicating that the charging pile has received the reservation information. After the electric vehicle receives the confirmation information, it indicates that the reservation is successful. Avoid wasting resources by booking multiple charging piles or charging ports at the same time because the user is not sure whether the booking is successful.

Claims (1)

1. A wireless charger for electric vehicles based on electromagnetic force, the charger includes a charger body (3) and an inductance coil (4), and the charger body (3) is used to convert the current generated by the inductance coil (4) into Electricity required for electric vehicles; The charger also includes a wireless transmission module and a charger controller (5), the charger controller (5) is used to set the charging threshold, and the wireless transmission module is used to transmit the charging threshold and the electric energy data stored by the electric vehicle in real time send out; It is characterized in that the charger controller (5) is embedded in a search module, and the search module includes the following units: Electric energy detection unit: detect the remaining electric energy of the electric vehicle in real time; Remaining kilometers calculation unit: calculate the remaining kilometers according to the remaining electric energy and current speed of the electric vehicle, and the remaining kilometers refer to the distance that the remaining electric energy can support under the premise of continuing to drive at the current speed; Data receiving unit: continuously receive the location information sent by each charging pile and the working status of each charging interface (1); Charging pile search unit: According to the location information sent by each charging pile, search for the location of each charging pile on the electronic map, display the distance between each charging pile and the nearest walking route of the electric vehicle, and sort the distance from near to far Number the charging piles in sequence, mark the charging piles whose distance is less than the remaining kilometers in red, and mark the charging piles whose distance is greater than or equal to the remaining kilometers in blue; Arrival time calculation unit: Calculate the time required to reach each charging pile according to the current vehicle speed, and this time is the arrival time; Charging time estimated value calculation unit: Calculate the remaining electric energy when reaching each red charging pile according to the power consumption per kilometer at the current vehicle speed, and then calculate the estimated charging time according to the rated charging current according to the remaining electric energy and charging threshold; Charging end time estimated value calculation unit: Calculate the charging end of charging with each charging port (1) of each red charging post according to the estimated charging time and the working status of each charging port (1) of each red charging post time estimate; Charging interface (1) sorting unit: arrange and display all charging interfaces (1) of all red charging piles according to the estimated value of charging end time from small to large, and among them, the charging interface (1) with the same estimated value of charging end time ) are arranged from small to large according to the number of the charging pile to which they belong; Charging interface (1) booking unit: receive the number of the charging pile selected by the user and the charging interface (1) number of the charging pile, and send reservation information to the charging pile, the reservation information includes the charging interface (1) of the charging pile ) number, the arrival time of the charging pile and the corresponding estimated charging time; The charging pile includes a charging pile controller (2) and a plurality of charging interfaces (1), each charging interface (1) includes an electromagnet and a telescopic mechanism, one end of the telescopic mechanism is fixed, and the electromagnet is fixed on the side of the telescopic mechanism. At the other end, the charging pile controller (2) is used to control the switching on and off of the electromagnet power supply; The charging interface (1) also includes a wireless receiving module, the wireless receiving module is used to receive the electric energy data and the charging threshold value sent by the electric vehicle, and send the electric energy data and the charging threshold value to the charging pile controller (2) , the charging pile controller (2) is embedded with a power control module, and the power control module is used to judge whether the power data sent by the electric vehicle reaches a threshold, and stops charging when the threshold is reached; The charging pile controller (2) is also embedded in a reservation module, and the reservation module includes the following units: The remaining charging time calculation unit: according to the real-time power data received by each working charging interface (1) and the threshold value set by the user, calculate the remaining charging time of the charging interface (1) in real time; State sending unit: continuously send the working state of each charging interface (1); Location sending unit: constantly sending the location information of the charging pile; Reservation information receiving unit: continuously receive reservation information from electric vehicles.