A system and method for charging an electric vehicle while in motion

Abstract

A system and method for charging an electric vehicle during driving, comprising: laying a plurality of strip magnets with north-south poles pointing parallel or tangential to the lane direction within a specified range under the road surface comprising at least two lanes; configuring a plurality of coils on the bottom of the electric vehicle and a satellite positioning device on the vehicle; configuring a rotating control mechanism to prompt the driver whether to change lanes in response to the current remaining battery capacity; when the coils are transversely arranged, the space between the coils is; when the coils are vertically arranged, the space between the coils is; and the space between each of the strip magnets is matched to or when the coils are transversely or vertically arranged, respectively, to obtain high charging efficiency. The driver can easily complete the efficient charging scheme during driving according to the current remaining capacity, ensuring good cycle life of the battery.

Description

TECHNICAL FIELD

[0001] The present application relates to a system for charging an electric vehicle, and in particular to a system and method for charging an electric vehicle while driving. BACKGROUND

[0002] Electric vehicles are new energy vehicles to replace fuel vehicles. The relationship between charging and endurance becomes the most concerned topic for consumers to accept such products. The prior art realizes continuous endurance through the setting of charging piles and the service of battery replacement. However, consumers always think that this is an inconvenient charging method, and the popularization degree of charging piles is not high, and the replacement of batteries actually means that consumers pay in advance for the total number of batteries that may be used in the life cycle of the car, and the price is high. Therefore, how to consider a low-cost and convenient charging method has become an urgent problem to be solved.

[0003] Energy conversion is a feasible way to convert part of the kinetic energy of the vehicle into electrical energy, thereby realizing a self-sufficient endurance strategy. That is, the more electricity used to convert into kinetic energy, the more kinetic energy converted back into electrical energy at a certain conversion rate, thereby saving charging time and starting charging in use. Moreover, it is necessary to find out how to match the charging strategy when the remaining battery capacity is low and to maximize the battery life. SUMMARY

[0004] In view of the above problems, the present application provides a scheme for charging an electric vehicle while driving. The following two problems are mainly considered. First, the distribution of the magnetic field, and second, the optimal remaining battery capacity to start charging.

[0005] Based on the above considerations, the present application provides a system for charging an electric vehicle while driving, comprising: a plurality of strip-shaped magnets with north-south poles pointing parallel or tangent to the lane direction are laid under the road surface including at least two lanes within a specified distance, a plurality of coils on the bottom of the electric vehicle and a satellite positioning device on the vehicle, a rotating control mechanism configured to prompt the driver whether to change lanes in response to the current battery remaining capacity, a support for the coils and a human driver to select whether to rotate the coils according to the prompt, forming one of the two states of horizontal or vertical, to obtain a high charging efficiency matched with the current battery remaining capacity, wherein the interval between the coils is when the coils are horizontal, and the interval is when the coils are vertical, and the interval between each of the strip-shaped magnets is matched accordingly to or obtain high charging efficiency, and the different corresponding matching interval bar magnets are alternately laid on different lanes (that is, the same state bar magnet on any lane and the state of the bar magnets on the two sides of the lane must be different, that is, the current lane is horizontally placed, and the left and right lanes must be vertically placed, and vice versa), wherein is a horizontal range of the predetermined non-negligible magnetic field B of the bar magnet, and B=0 is defined outside the horizontal range,

[0006] The alternating current on the coil is rectified by the corresponding rectifier bridge to charge the battery, and the corresponding rectifier bridge includes a first rectifier bridge and a second rectifier bridge connected in parallel to the battery charging, respectively used to connect the coil in the horizontal and vertical states.

[0007] It should be noted that the coil is installed on the chassis of the electric vehicle, and the permanent magnet bar is laid on the road. The interval of the present application refers to the space distance between each two bar magnets or coils, not the distance between any corresponding points on the bar magnets or coils themselves.

[0008] Optionally, the specified journey is 10-50km.

[0009] Optionally, the rotation control mechanism includes a coil sleeve outside the coil, an extension gear shaft provided with a gear outside the coil sleeve or an extension belt pulley shaft provided with a belt pulley, the gear is driven to rotate by a chain or the belt pulley is driven to rotate by a belt, thereby driving the coil sleeve to rotate to switch the two states of the coil, and a processor for determining whether to execute the step of prompting the driver in response to the remaining power and the current lane information judged by the vehicle-mounted satellite positioning device, and controlling the switching operation according to the driver's choice of lane change, wherein the lane information includes the interval of the bar magnets in the lane.

[0010] Optionally, the driver's choice of lane change is determined according to whether the turn signal is started or not, and the start is determined as the choice, otherwise it is not selected.

[0011] Optionally, when the driver does not choose to change lanes according to the prompt, the rotation control mechanism maintains the current state of the coil and the prompt; when the driver chooses to change lanes according to the prompt, the rotation control mechanism changes the state of the coil and terminates the prompt in a predetermined time.

[0012] Preferably, the predetermined time is 3-10s.

[0013] When the driver does not turn on the turn signal but actually changes lanes according to the prompt, the vehicle-mounted satellite positioning device makes the rotation control mechanism execute the switching operation and terminate the prompt according to the newly judged lane information after the lane change.

[0014] Preferably, the vehicle-mounted satellite positioning device determines its location using the BeiDou-3 navigation and positioning satellites.

[0015] Understandably, the driver is prompted when the remaining battery power does not match the spacing of the bar magnet corresponding to the lane determined by positioning. The driver then decides whether to change lanes based on the lane change conditions and their own wishes, in order to move to a lane where the bar magnet status matches the current remaining battery power.

[0016] Optionally, the vehicle-mounted satellite positioning device determines the current lane information every 10 seconds to 1 minute, and then the rotation control mechanism decides whether to perform the step of prompting the driver.

[0017] Preferably, the coil has extended electromagnetic shielding leads at both ends, and the first rectifier bridge and the second rectifier bridge each have a set of contact bars with two terminals leading out (a set of contact bars has two contact bars). When the rotation control mechanism alternately switches the state of the coil, the electromagnetic shielding leads can alternately connect to a set of contact bars corresponding to the first rectifier bridge or the second rectifier bridge.

[0018] Optionally, each of the first and second rectifier bridges has at least one set of contact strips with two terminals extending outwards, which has a contact strip for connecting electromagnetic shielding leads corresponding to the two ends of the coil.

[0019] One of the coils passes through the horizontal range Then, the equivalent charging current when the coil is horizontal. ,in, For coefficients less than 1, The number of coil turns. The peak value of the magnetic flux wave is the first equivalent uniform magnetic field strength. ,in The magnitude of the magnetic field strength in the vertical direction of the outermost rectangular magnetic field lines is formed by the outermost rectangular magnetic field lines of the simulated magnetic field. The horizontal distance between the horizontal side and the outermost rectangular magnetic field lines of the simulated magnetic field is... The magnitude of the magnetic field strength in the vertical direction of the rectangular magnetic field lines. During the cutting process, the projection of the horizontal rectangular cross-section of the magnetic strip onto the coil's conductor is perpendicular to the vehicle speed. The length of the conductor in the direction, where the actual electric field strength at the point of tangency between each magnetic field line of the magnetic strip and the circumscribed rectangle is taken as the electric field strength at each point on the side of the rectangle where the point of tangency is located; the equivalent charging current is measured. calculate and control parameters The method is as follows: Equivalent voltage is obtained by measuring the voltage waveforms of vehicles at different speeds, and then the coil resistance is used... According to Ohm's law, a plurality of corresponding measured equivalent current values are calculated, and linear fitting is performed through formulas (2) and (3) respectively and ;

[0020] When the coil is vertically placed, the equivalent charging current , so , and the equivalent number of turns ,

[0021] wherein the second equivalent magnetic field uniformity , the magnetic flux peak value , The horizontal side distance of the outermost rectangular magnetic force line of the simulated magnetic field is , and the magnetic field strength in the vertical direction of the rectangular magnetic force line is The method for obtaining the equivalent number of turns is as follows: the control parameter is calculated by measuring the equivalent charging current , and substituted into formula (4) to obtain The equivalent voltage is obtained by measuring the voltage waveform of the vehicle at different speeds, and the equivalent voltage is obtained by using wherein The calculation method is as follows: the equivalent voltage is obtained by measuring the voltage waveform of the vehicle at different speeds, and the equivalent voltage is obtained by using the coil resistance According to Ohm's law, a plurality of corresponding measured equivalent current values are calculated, and linear fitting is performed through formula (6) , is the vertical height when the normal line of the cross section of the coil is perpendicular to the ground.

[0022] Preferably, the two equivalent power generation current calculation methods in formulas (1) and (4) are respectively arithmetically averaged to obtain According to the obtained and , formula (8) can be obtained by substituting , and wherein .

[0023] As shown in Figure 1 , if the vehicle speed is taken as the horizontal coordinate, and the equivalent charging current is taken as the vertical coordinate, a coordinate system is established, and according to formulas (1) and (4), the equivalent charging current straight line functions intersect at the coordinate system origin (a and b) or coincide in two cases due to different or same slopes. Since the equivalent number of turns , , and ​ Although both are greater than 2, and are greater, but not too much different. Thus, finally we can only actually get which one of the horizontal or vertical slope is greater by calculation. This depends on the degree. That is, affected by the design size of the and , which in turn affects the height of the rear floor hump, and thus the experience of the passenger. Therefore, the design size of the and of the coil needs to be considered in these factors, so as to get a reasonable degree, to finally determine which one of the horizontal or vertical slope is greater. However, to get the parallel state, the values of the parameters need to be calculated to get the appropriate value, which is difficult, so almost all the coil designs are always such that the equivalent charging current straight line functions do not coincide.

[0024] And the current battery remaining power is different, the charging rate is also different, such as low, the driver requires fast charging, otherwise, the relative slow charging is required.

[0025] Let the battery capacity be (dimension Ah), so when the remaining power is less than the predetermined amount , , then take the corresponding coil state with the larger equivalent charging current straight line function slope, otherwise , both have remaining power , then take the corresponding coil state with the smaller equivalent charging current straight line function slope, and in both cases, the interval between the matching lane strip magnets is taken as the interval corresponding to the corresponding coil state, if the interval of the strip magnets of the current lane does not match the interval corresponding to the corresponding coil state, then the rotating control mechanism prompts the driver to change lanes.

[0026] A method for charging an electric vehicle in driving using the system described above, comprising the following steps after the electric vehicle enters a lane:

[0027] S1 The rotating control mechanism acquires the remaining power and determines the current lane by the vehicle-mounted satellite positioning device every 10s-1min, to determine whether to perform the step of prompting the driver;

[0028] S2 Let the battery capacity be (dimension Ah), so when the remaining power is less than the predetermined amount , , then take the corresponding coil state with the larger equivalent charging current straight line function slope, otherwise , both have remaining power When the current state of the coil is not matched with the state corresponding to the current lane, the rotating control mechanism prompts the driver to change lane; when the current state of the coil is matched with the state corresponding to the current lane, the rotating control mechanism does not prompt the driver to change lane.

[0029] S3 When the driver does not choose to change lane according to the prompt, the rotating control mechanism keeps the current state of the coil and the prompt; when the driver chooses to change lane according to the prompt, the rotating control mechanism changes the state of the coil and terminates the prompt within a preset time.

[0030] S4 Repeat steps S1-S3 until the specified journey is completed, and the charging is finished.

[0031] Preferably, the preset time is 3-10s.

[0032] Optionally, the driver's choice of changing lane or not is determined according to whether the turn signal is turned on or not, and the turn signal is turned on, the rotating control mechanism controls the coil to change the state of the coil to complete the state switching operation within a preset time, and when the driver does not turn on the turn signal but actually changes lane according to the prompt, the vehicle-mounted satellite positioning device makes the rotating control mechanism perform the switching operation and terminate the prompt according to the newly determined lane information after the lane is changed.

[0033] Optionally, the charging method further comprises the following steps which are independent of steps S1-S4:

[0034] P1 According to the cycle life test of charging to 95% under a plurality of remaining capacities, it is prompted to the driver whether to start charging after entering the charging lane based on the current remaining capacity;

[0035] P2 If the driver does not manually start the charging program, the system autonomously determines whether to start charging, otherwise the system starts charging according to the manual start of the driver.

[0036] The cycle life test comprises the following steps:

[0037] P1-1 Select a plurality of batteries in each experimental group with a remaining capacity greater than 60%, 60%-40%, 40%-20%, 20%-10%, and less than 10%;

[0038] P1-2 Perform a cycle charge-discharge experiment of the plurality of batteries to determine the average battery cycle life of each group by repeatedly performing a cycle charge-discharge experiment of the plurality of batteries from charging to 95% to discharging to the amount of electricity before charging.

[0039] P1-3 selects the remaining power group with the longest average cycle life as the charging threshold range.

[0040] P1 further comprises, based on the current remaining power, prompting the driver whether to start charging after entering the charging lane, which further comprises, by the processor of the rotating control mechanism, comparing whether the current remaining power falls within the charging threshold range, prompting the driver whether to start charging after entering the charging lane when falling within the charging threshold range or being less than the charging threshold range; when the remaining power is greater than the charging threshold range, the driver is not prompted whether to start charging after entering the charging lane, at which time the driver can freely choose or not to manually start the charging program.

[0041] P2 autonomously determines whether to start charging, specifically comprising autonomously determining to start charging when the remaining power falls within the charging threshold range or is less than the charging threshold range, and starting the charging program.

[0042] Optionally, when the vehicle-mounted satellite positioning device determines that the current lane is within 100-1000m in front of the charging lane, step P1 is performed.

[0043] Optionally, the electromagnetic shielding plate movably arranged opposite the coil is used to control whether the coil is shielded to control the start of the charging program.

[0044] Preferably, the driver can freely choose to pause, restart, or terminate the charging program at any time based on the current remaining power, and after selecting to terminate the charging program, the driver cannot restart it, and after driving out of the charging lane, the system automatically terminates the charging program. Advantages

[0045] 1. By arranging the lane strip magnets at intervals, different strip magnet intervals are formed in the charging lane, which facilitates the driver to complete efficient charging in the driving process based on the current remaining power.

[0046] 2. The charging threshold range based on the cycle life test can determine whether to charge, which ensures good cycle life of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 Range through the transverse and vertical coils After the equivalent charging current direct current function image diagram,

[0048] Figure 2 Strip magnet laying diagram in the system for charging electric vehicles in driving,

[0049] Figure 3 Vehicle bottom coil state switching and rectifier bridge charging circuit structure diagram in the system for charging electric vehicles in driving,

[0050] Figure 4 A schematic diagram of the structure of the rotating control mechanism in the system for charging the electric vehicle while driving, excluding the processor,

[0051] Figure 5 A structure diagram of the rectifier bridge,

[0052] Figure 6 A flowchart of the charging method of embodiment 2 of the present application,

[0053] Figure 7 A flowchart of the charging method of embodiment 3 of the present application,

[0054] Figure 8 A schematic diagram of the configuration between the strip magnets laid on the road in embodiment 4 of the present application and the coils on the vehicle.

[0055] Wherein the reference signs, 3, battery, 7, electric energy inverter, 8, vehicle-mounted electrical equipment. DETAILED DESCRIPTION Embodiment 1

[0056] As Figure 2 shown, a system for charging an electric vehicle while driving includes, taking a same-direction variable double lane as an example, strip magnets each distributed at intervals of and , and the vehicle speed direction is directed to the S pole, the system further includes three coils on the vehicle bottom and a vehicle-mounted satellite positioning device (not shown in the figure) configured on the electric vehicle as Figure 3 shown. As Figure 3 and 4 shown, a rotating control mechanism is configured to prompt the driver whether to change lanes in response to the current battery remaining capacity, for supporting the coils and allowing the driver to manually select whether to rotate the coils according to the prompt, to form one of two states of horizontal or vertical (see Figure 2 the horizontal and vertical states of the arrow direction prostrate shape) and prompt the driver whether to change lanes, so as to obtain high charging efficiency matched with the current battery remaining capacity.

[0057] Wherein the coils extend electromagnetic shielding leads at both ends, and the alternating current on the coils charges the battery 3 after being rectified by the corresponding first rectifier bridge and second rectifier bridge, and the electric energy inverter 7 outputs the battery 3 into a general alternating current power supply to supply each vehicle-mounted electrical equipment 8 (including the rotating control mechanism).

[0058] As Figure 3 shown, the first rectifier bridge and the second rectifier bridge each have a set of two terminals leading out a set of two strips (a set of two strips has two strips), when the rotating control mechanism alternately switches the state of the coils (forms horizontal intervals of and vertical intervals of The electromagnetic shield lead can alternatively be lapped onto a set of contact strips corresponding to the first rectifier bridge or the second rectifier bridge. The first rectifier bridge and the second rectifier bridge each have at least one set of contact strips with two terminals, and at least one set of contact strips with a contact branch for lapping the electromagnetic shield lead extending from the two ends of the coil.

[0059] As shown in Figure 4 , the rotation control mechanism includes a coil sleeve (1) sleeved outside the coil (2), an extension gear shaft (3) outside the coil sleeve, a gear (4) driven by the extension gear shaft (3) to rotate the coil sleeve (3), and a processor (not shown in the figure) for determining whether to execute the step of prompting the driver according to the remaining power and the current lane information determined by the vehicle-mounted satellite positioning device, and controlling the switching operation according to the driver's choice of changing lanes. Figure 4 As an example of a coil, the extension gear shaft (3) outside the coil sleeve (2) is provided, the gear (4) is driven by the chain to rotate, thereby driving the coil sleeve (3) to rotate (three coil sleeves are connected to rotate together), to switch the two states of the coil, and the processor (not shown in the figure) is used to determine whether to execute the step of prompting the driver according to the remaining power and the current lane information determined by the vehicle-mounted satellite positioning device, and to control the switching operation according to the driver's choice of changing lanes, wherein the lane information includes the interval of the strip magnets in the lane.

[0060] As shown in Figure 5 , the rectifier bridge of the embodiment can include a chip and four NMOS tubes, the chip includes pins T1, T2, T3 and T4 connected to the output ends of the respective NMOS tubes, and two input ends A and B, that is, if A is positive and B is negative, then T1 and T4 are turned on and T2 and T3 are turned off. If A is negative and B is positive, then T2 and T3 are turned on and T1 and T4 are turned off. In this way, the C point always outputs a positive voltage, and the D point outputs a negative voltage. After filtering and voltage stabilization, the battery can be safely charged.

[0061] Embodiment 2

[0062] As shown in Figure 6 , a method for charging an electric vehicle while driving using the system described above, comprising the following steps after the electric vehicle enters a lane:

[0063] S1 The rotation control mechanism acquires the remaining power and the current lane determined by the vehicle-mounted satellite positioning device every 10 seconds, to determine whether to execute the step of prompting the driver;

[0064] S2 When the capacity of the battery is (Ah), when the remaining power is less than a predetermined amount , , the equivalent charging current straight line function slope of the corresponding coil state is taken, otherwise , the remaining power is When the current lane is not matched with the corresponding coil state, the rotation control mechanism prompts the driver to change lane; and

[0065] S3 When the driver does not choose to change lane according to the prompt, the rotation control mechanism keeps the current coil state and the prompt; when the driver chooses to change lane according to the prompt, the rotation control mechanism changes the coil state and terminates the prompt within 3s;

[0066] S4 Repeat steps S1-S3 until the specified trip is completed, and the charging is finished.

[0067] The driver's choice of changing lane is determined according to whether the turn signal is on or not, and the turn signal is on, the choice is determined, otherwise, the choice is not determined. When the turn signal is on, the rotation control mechanism controls the coil to change the coil state within a predetermined time to complete the state switching operation. When the driver does not turn on the turn signal but actually changes lane according to the prompt, the vehicle-mounted satellite positioning device makes the rotation control mechanism perform the switching operation and terminate the prompt according to the newly determined lane information after changing lane.

[0068] Embodiment 3

[0069] The charging method of embodiment 2 further comprises the following steps which are independent of steps S1-S4: when the vehicle-mounted satellite positioning device determines that the current lane is within 500m of the charging lane, P1 performs a cycle life test according to the charging to 95% of the remaining capacity, and prompts the driver whether to start charging after entering the charging lane based on the current remaining capacity;

[0070] P2 If the driver does not manually start the charging program, the system determines whether to start charging automatically, otherwise, the system starts charging according to the driver's manual start.

[0071] As shown in the following table, the cycle life test comprises the following steps: Figure 7

[0072] P1-1 Select multiple batteries in each experimental group with remaining capacity greater than 60%, 60%-40%, 40%-20%, 20%-10%, and less than 10%;

[0073] P1-2 Multiple batteries cyclically perform a cycle charge-discharge experiment of discharging to the amount of electricity before charging when the battery is charged to 95%, to finally determine the average battery cycle life of each group;

[0074] ​P1-3 selects the remaining battery level group with the longest average cycle life as the charging threshold range.

[0075] The P1 mechanism, which prompts the driver whether to start charging after entering the charging lane based on the current remaining battery power, further includes the processor of the rotary control mechanism comparing whether the current remaining battery power falls within the charging threshold range. If it falls within the charging threshold range or is less than the charging threshold range, the driver is prompted whether to start charging after entering the charging lane. If the remaining battery power is greater than the charging threshold range, the driver is not prompted whether to start charging after entering the charging lane. In this case, the driver can freely choose whether or not to manually start the charging procedure.

[0076] In P2, the system autonomously determines whether to start charging. Specifically, when the remaining power falls within or is below the charging threshold, the system autonomously determines to start charging and initiates the charging process.

[0077] The coil is protected by an electromagnetic shielding plate that is movable directly below it. Figure 2 (Not shown) Whether to block the coil to shield the magnetic field and control the start of the charging program.

[0078] The driver can freely choose to pause, restart, or terminate the charging process at any time based on the current remaining battery power. Once the charging process is terminated, it cannot be restarted. The system will automatically terminate the charging process when the driver leaves the charging lane.

[0079] Example 4

[0080] This embodiment, based on Embodiment 1, considers greater charging efficiency and charging voltage by arranging more bar magnets side-by-side (e.g., 3 rows) in each charging path, and the coil is designed with a width of 1-1.5m. This allows the coil to cut more magnetic lines of force from the bar magnets. Figure 8 As shown. Each of its passing ranges The average charging voltage can be obtained by multiplying the number of rows by formulas (1), (4) or (8), (9). Multiply by the coil resistance to estimate. That is, use formulas (1) and (4) to calculate the average charging voltage. (10), The average charging voltage is calculated using formulas (8) and (9). , .

[0081] It can be seen that the charging voltage is related to the vehicle speed, number of turns, number of bar magnets side by side, or coil parameters. Both the magnetic field strength of the bar magnet and the magnetic field strength of the bar magnet have an increasing function relationship.

Claims

1. A system for charging an electric vehicle while it is in motion, characterized in that, The system includes multiple bar magnets laid within a predetermined distance beneath a road surface comprising at least two lanes, with their north and south poles pointing parallel to or tangential to the lane directions; multiple coils mounted on the underside of the electric vehicle; and an onboard satellite positioning device. A rotary control mechanism is configured to prompt the driver whether to change lanes in response to the current remaining battery power. This rotary control mechanism supports the coils and allows the driver to manually select whether to change lanes based on the prompts, thereby rotating the coils to either a horizontal or vertical position to achieve high charging efficiency matching the current remaining battery power. When the coils are horizontal, there is a gap between them. When the coil is placed vertically, the interval is... The spacing between each of the bar magnets is matched accordingly based on whether the coil is horizontal or vertical. or To achieve high charging efficiency, the strip magnets with different corresponding matching intervals are alternately laid on different lanes, wherein... Let B be a predetermined horizontal range in the horizontal direction of the bar magnet where a non-negligible magnetic field exists. Outside this horizontal range, B = 0. The alternating current on the coil is rectified by the corresponding rectifier bridge to charge the battery. The corresponding rectifier bridge includes a first rectifier bridge and a second rectifier bridge connected in parallel to charge the battery, which are used to connect the coil in the horizontal and vertical states, respectively. The electric vehicle chassis is equipped with a coil, and permanent magnet strips are laid on the road. The rotation control mechanism includes a coil sleeve fitted around the coil, an extended gear shaft with a gear or an extended pulley shaft with a pulley on the outer edge of the coil sleeve, which drives the gear to rotate via a chain or drives the pulley to rotate via a belt, thereby driving the coil sleeve to rotate to switch the two states of the coil, and a processor for responding to the remaining power and receiving information from the vehicle-mounted satellite positioning device to determine the current lane information, thereby deciding whether to execute the step of prompting the driver, and controlling the switching operation according to whether the driver chooses to change lanes, wherein the lane information includes the spacing of the strip magnets in the lane; The coil has extended electromagnetic shielding leads at both ends. The first rectifier bridge and the second rectifier bridge each have a set of contact bars with two terminals. When the rotation control mechanism alternately switches the state of the coil, the electromagnetic shielding leads can alternately connect to a set of contact bars corresponding to the first rectifier bridge or the second rectifier bridge. At least one set of contact bars with two terminals in each of the first rectifier bridge and the second rectifier bridge has a contact bar for connecting to the extended electromagnetic shielding leads at both ends of the coil.

2. The system according to claim 1, characterized in that, The specified travel distance is 10-50km.

3. The system according to claim 1, characterized in that, The driver's choice of whether to change lanes is determined based on whether the turn signal is activated or not; if it is activated, it is considered a choice; otherwise, it is considered a non-choice.

4. The system according to claim 3, characterized in that, When the driver does not choose to change lanes according to the prompt, the rotation control mechanism maintains the current state of the coil and the prompt; when the driver chooses to change lanes according to the prompt, the rotation control mechanism changes the state of the coil and terminates the prompt within a preset time.

5. The system according to claim 4, characterized in that, The preset time is 3-10 seconds.

6. The system according to any one of claims 3-5, characterized in that, If the driver changes lanes without activating the turn signal but does so as prompted, the vehicle-mounted satellite positioning device, based on the newly determined lane information after the lane change, causes the rotation control mechanism to perform the switching operation and terminate the prompt.

7. The system according to claim 6, characterized in that, The vehicle-mounted satellite positioning device determines its location using the BeiDou-3 navigation and positioning satellites.

8. The system according to claim 7, characterized in that, Every 10 seconds to 1 minute, the vehicle-mounted satellite positioning device determines the current lane information, and then the rotation control mechanism decides whether to perform the step of prompting the driver.

9. The system according to claim 1, characterized in that, Each charging path has more bar magnets arranged side by side, and the L range of the coil set under the vehicle is 1-1.5m.

10. A method for charging an electric vehicle while in motion using the system as described in any one of claims 1-9, characterized in that, This includes taking the following steps after an electric vehicle enters the first lane: S1 Every 10 seconds to 1 minute, the rotation control mechanism obtains the remaining power and the vehicle-mounted satellite positioning device to determine the current lane, and decides whether to execute the step of prompting the driver. S2 assuming the battery capacity is The unit of measurement is Ah, therefore when the remaining power is less than the predetermined amount... hour, If the slope of the equivalent charging current linear function is larger, then the coil state corresponding to the larger slope is selected; otherwise... All have remaining battery power. When the equivalent charging current linear function slope is smaller, the corresponding coil state is selected. In both cases, the interval between the matched lane bar magnets is taken as the interval corresponding to the corresponding coil state. If the interval of the bar magnet of the current lane does not match the interval corresponding to the corresponding coil state, the rotation control mechanism will prompt the driver to suggest a lane change. No prompt will be given when matching. S3 When the driver does not choose to change lanes according to the prompt, the rotation control mechanism maintains the current state of the coil and the prompt; When the driver chooses to change lanes according to the prompt, the rotation control mechanism changes the state of the coil and terminates the prompt within a preset time. S4 repeats steps S1-S3 until the specified cycle is completed, and then the charging ends.

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