Automobile charging system

Abstract

The utility model relates to the field of electric automobiles, in particular to the field of electric automobile charging. An automobile charging system comprises a self-induction power supply coil buried at the bottom of an automobile parking space, a movable charging frame installed at the bottom of an automobile, a self-induction charging coil installed at the end of the movable charging frame, a charging circuit, a power supply circuit, an automobile master control system and a parking lot control system. The self-induction power supply coil is connected with a power supply through a power supply circuit. The self-induction charging coil is connected with an automobile storage battery through a charging circuit. During charging, the automobile is located in the automobile parking space, the axis of the self-induction charging coil is parallel to the axis of the self-induction power supply coil, the distance between the self-induction charging coil and the self-induction power supply coil is equal to the set distance, and the projection of the self-induction charging coil on the ground is located in the projection of the self-induction power supply coil on the ground.

Description

Technical Field

[0001] The utility model relates to the field of electric vehicles, in particular to the field of electric vehicle charging. Background Art

[0002] Electric vehicles (BEV) refer to vehicles that use onboard power as a power source, use motors to drive wheels, and comply with various requirements of road traffic and safety regulations. Electric vehicles do not have the exhaust gas produced by internal combustion engine vehicles when they are working, and do not produce exhaust pollution. They are very beneficial to environmental protection and air cleanliness, and are almost "zero pollution". It is well known that pollutants such as CO, HC, NOX, particulates, and odor in the exhaust gas of internal combustion engine vehicles form acid rain, acid mist, and photochemical smog. Electric vehicles do not have the noise produced by internal combustion engines, and the noise of electric motors is also smaller than that of internal combustion engines. Since electric vehicles have a smaller impact on the environment than traditional vehicles, their prospects are widely optimistic.

[0003] However, despite the concept of "green" travel, electric vehicles still face many problems, including a lack of charging stations and long charging time.

[0004] The Chinese patent number is: CN202311130630.6, and the patent name is: Intelligent Identification Autonomous Mobile Electric Vehicle Charging System. A intelligent identification autonomous mobile electric vehicle charging system is disclosed, which realizes the high resonance of the electromagnetic transmitting coil of wireless charging and the electromagnetic receiving coil of the electric vehicle. The system includes: an electromagnetic transmitting coil, which is arranged in an underground space; a power component, the action component is connected to the electromagnetic transmitting coil to drive it to move in the underground space; and a magnetic coupling induction device, which is configured to detect the coupling between the electromagnetic transmitting coil and the receiving coil on the electric vehicle on the ground, and according to the coupling, the power component moves the electromagnetic transmitting coil to the best magnetic coupling matching position with the receiving coil. It can realize intelligent identification autonomous mobile electric vehicle charging, but this charging still requires the installation of charging piles at the parking location of the car, and the charging piles will occupy the ground space. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to provide a car charging system, so that when a car is parked in a parking lot, it can be automatically charged as long as it is in the parking space, and there is no need to install a charging pile on the ground.

[0006] The technical solution adopted by the utility model is: a car charging system, including a self-induction power supply coil 2 buried at the bottom of a car parking space 1, a movable charging rack 5 installed at the bottom of a car 3, a self-induction charging coil 4 installed at the end of the movable charging rack 5, a charging circuit, a power supply circuit, a car main control system and a parking lot control system, the self-induction power supply coil 2 is connected to a power supply 6 through a power supply circuit, and the self-induction charging coil 4 is connected to a car battery 7 through a charging circuit; when charging, the car 3 is in the car parking space 1, the axis of the self-induction charging coil 4 is parallel to the axis of the self-induction power supply coil 2, and the distance between the self-induction charging coil 4 and the self-induction power supply coil 2 is equal to the set distance, and the projection of the self-induction charging coil 4 on the ground is in the projection of the self-induction power supply coil 2 on the ground. The charging circuit is located below the ground.

[0007] The power supply circuit includes a power supply electromagnetic switch 61, a power supply ammeter 62, and a self-induction power supply coil 2. The self-induction power supply coil 2, the power supply electromagnetic switch 61, the power supply 6, and the power supply ammeter 62 are connected to form a first series closed loop. The power supply ammeter 62 and the power supply electromagnetic switch 61 are electrically connected to the parking lot control system.

[0008] The charging circuit includes a first electromagnetic charging switch 71, a voltage stabilizer 8, a second electromagnetic charging switch 74 and a charging ammeter 75. The voltage stabilizer 8 includes a main voltage stabilizing coil 72 and a slave voltage stabilizing coil 73. The self-induction charging coil 4, the first electromagnetic charging switch 71 and the main voltage stabilizing coil 72 are connected to form a second series closed loop. The slave voltage stabilizing coil 73, the second electromagnetic charging switch 74, the charging ammeter 75 and the automobile battery 7 are connected to form a third series closed loop. The electrical signals of the first electromagnetic charging switch 71, the second electromagnetic charging switch 74 and the charging ammeter 75 are connected to the automobile main control system.

[0009] The movable charging frame 5 includes a motor 51, a connecting shaft 52, and a hydraulic cylinder. The hydraulic cylinder includes a hydraulic cylinder body 53 and a telescopic arm 54. The end of the telescopic arm 54 is installed with a self-induction charging coil 4. The motor 51 is fixedly installed on the bottom of the car 3. The output shaft of the motor 51 is vertically fixed to one end of the connecting shaft 52. The other end of the connecting shaft 52 is fixedly connected to the hydraulic cylinder body 53. The electrical signals of the motor 51 and the hydraulic cylinder are connected to the main control system of the car.

[0010] The bottom of the automobile 3 has a movable charging rack slot at a position corresponding to the movable charging rack 5 . When the automobile 3 does not need to be charged, the movable charging rack 5 is in the movable charging rack slot.

[0011] The principle of the utility model is that when a car is in a parking space, a wireless connection is established between the car main control system and the parking lot control system. The car main control system determines whether charging is required based on the amount of power in the car battery. If charging is required, the car main control system sends a charging demand signal (i.e., an opening signal) to the power supply electromagnetic switch through the parking lot control system. After the power supply electromagnetic switch receives the charging demand signal, the power supply electromagnetic switch is turned on, and the power supply provides an alternating current to the self-inductive power supply coil, which generates an alternating magnetic field. At the same time as the car main control system sends a charging demand signal to the power supply electromagnetic switch, the control The motor rotates to make the connecting shaft perpendicular to the ground, and then controls the telescopic arm of the hydraulic cylinder to extend so that the distance between the self-induction charging coil and the self-induction power supply coil 2 is equal to the set distance. The automobile main control system controls the first electromagnetic charging switch and the second electromagnetic charging switch to be connected (closed). The self-induction charging coil generates an alternating current under the action of the alternating magnetic field of the self-induction power supply coil. The alternating current generated by the self-induction charging coil causes the main voltage stabilizing coil to generate an alternating current. The main voltage stabilizing coil generates an alternating magnetic field under the action of the alternating current. The alternating magnetic field causes the slave voltage stabilizing coil to generate an alternating current. The alternating current generated by the slave voltage stabilizing coil charges the automobile battery. When charging is completed, the current of the charging ammeter decreases. When the current value of the charging ammeter is less than or equal to the set value (charging is completed), when the automobile main control system receives the current value of the charging ammeter less than or equal to the set value, it sends a charging completion disconnection signal to the first electromagnetic charging switch and the second electromagnetic charging switch. The first electromagnetic charging switch and the second electromagnetic charging switch are disconnected. The automobile main control system sends a reset signal to the motor and the hydraulic cylinder, and the motor and the hydraulic cylinder are reset. When the car is needed during the charging process (it can be used but not fully charged), the car main control system sends a charging interruption signal to the first electromagnetic charging switch and the second electromagnetic charging switch, and the first electromagnetic charging switch and the second electromagnetic charging switch are disconnected. The car main control system sends a reset signal to the motor and the hydraulic cylinder, and the motor and the hydraulic cylinder are reset. When the parking lot control system detects that the current of the power supply ammeter is less than the current setting value within 3 minutes, the power supply electromagnetic switch is disconnected.

[0012] The beneficial effects of the utility model are as follows: the utility model performs contactless car charging based on the principle of electromagnetic conversion. The utility model does not need to install an independent charging device on the ground in each parking space, does not affect the use of parking spaces in existing parking lots, and is convenient to charge without manual plugging and unplugging of power cords. The utility model has low cost. It only needs to install a total transformer in the parking lot (that is, provide the power supply required for charging) to meet the charging power requirements of all parking spaces at the same time. It only needs to install a coil and an ammeter for each parking space, and then the entire parking lot can be controlled by a control system (parking lot control system). Compared with a separate charging device, the cost is low. There is not much need for car modifications, and existing technology can complete low-cost improvements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a car parked in a parking space;

[0014] Figure 2 It is a schematic diagram of the position of the movable charging rack of the car;

[0015] Figure 3 It is a schematic diagram of the main circuit of the utility model;

[0016] Figure 4 It is a schematic diagram of the structure of a movable charging stand;

[0017] Among them, 1. car parking space, 2. self-induction power supply coil, 3. car, 4. self-induction charging coil, 5. movable charging rack, 6. power supply, 7. car battery, 8. voltage stabilizer, 9. induction charging connection device, 51. motor, 52. connecting shaft, 61. power supply electromagnetic switch, 62. power supply ammeter, 71. first electromagnetic charging switch, 72. main voltage stabilizing coil, 73. voltage stabilizing coil, 74. second electromagnetic charging switch, 75. charging ammeter. DETAILED DESCRIPTION

[0018] like Figure 1-4 As shown, the utility model is a car charging system, including a self-induction power supply coil 2 buried at the bottom of a car parking space 1, a movable charging rack 5 installed at the bottom of a car 3, a self-induction charging coil 4 installed at the end of the movable charging rack 5, a charging circuit, a power supply circuit, a car main control system (using an existing car control system) and a parking lot control system (the parking lot control system is a PLC control system with wireless routing, and those skilled in the art know how to prepare it). The self-induction power supply coil 2 is connected to a power supply 6 through a power supply circuit, and the self-induction charging coil 4 is connected to a car battery 7 through a charging circuit; when charging, the car 3 is in the car parking space 1, the axis of the self-induction charging coil 4 is parallel to the axis of the self-induction power supply coil 2, and the distance between the self-induction charging coil 4 and the self-induction power supply coil 2 is less than or equal to the set distance, and the projection of the self-induction charging coil 4 on the ground is in the projection of the self-induction power supply coil 2 on the ground.

[0019] The position corresponding to the self-induction power supply coil 2 in the parking space 1 of the car is related to the position of the movable charging rack 5 installed on the car 3, and the two need to correspond. Generally, the movable charging rack 5 is installed on the rear side of the bottom of the car 3, and the movable charging rack 5 includes a motor 51, a connecting shaft 52, and a hydraulic cylinder. The hydraulic cylinder includes a hydraulic cylinder body 53 and a telescopic arm 54, and the end of the telescopic arm 54 is installed with a self-induction charging coil 4 (in actual use, the self-induction charging coil 4 is connected to the end of the telescopic arm 54 in a rotatable connection, such as by a motor, and the self-induction charging coil 4 is installed on the rotating shaft of this motor, so that it can be further folded to avoid occupying too much space on the car. Of course, the rotating motor can also be omitted), the motor 51 is fixedly installed at the bottom of the car 3, and the output shaft of the motor 51 is vertically fixed to one end of the connecting shaft 52 (it can be welded or bolted), and the other end of the connecting shaft 52 is fixedly connected to the hydraulic cylinder body 53, and the electrical signals of the motor 51 and the hydraulic cylinder are connected to the main control system of the car. In order to ensure smooth charging, it is necessary to satisfy that the axis of the self-induction charging coil 4 is parallel to the axis of the self-induction power supply coil 2 and the distance between the self-induction charging coil 4 and the self-induction power supply coil 2 is equal to the set distance, and the projection of the self-induction charging coil 4 on the ground is in the projection of the self-induction power supply coil 2 on the ground. Therefore, according to the possible position of the car 3 correctly parking in the car parking space 1, the maximum range covered by the self-induction charging coil 4 on the ground is determined, and then the entire range is used as the corresponding projection range of the self-induction charging coil 4. Ensure that the car 3 can meet the charging needs when it is parked correctly in the car parking space 1. The base of the motor 51 (which can be a stepping rotary motor) is fixed to the bottom of the car. Of course, other movable charging racks 5 can also be used, as long as it is ensured that the movable charging rack 5 can be folded when the car is not charging, and when the car is charging, it can satisfy that the axis of the self-induction charging coil 4 is parallel to the axis of the self-induction power supply coil 2 and the distance between the self-induction charging coil 4 and the self-induction power supply coil 2 is less than or equal to the set distance (in one embodiment, the set distance is 2cm), and the projection of the self-induction charging coil 4 on the ground is in the projection of the self-induction power supply coil 2 on the ground. The axis of the self-induction power supply coil 2 is vertically buried at the bottom of the car parking space 1. The closer the distance between the self-induction power supply coil 2 and the ground surface is, the better, but it should not protrude from the ground to avoid wear and tear.

[0020] The self-induction charging coil 4 and the self-induction power supply coil 2 form an induction charging connection device 9. The induction charging connection device 9 uses electromagnetic effect for connection (in the prior art, the self-induction charging coil 4 and the self-induction power supply coil 2 use the same iron core).

[0021] The power supply circuit includes a power supply electromagnetic switch 61 and a power supply ammeter 62. The self-induction power supply coil 2, the power supply electromagnetic switch 61, the power supply 6, and the power supply ammeter 62 are connected to form a first series closed loop. The electrical signals of the power supply ammeter 62 and the power supply electromagnetic switch 61 are connected to the parking lot control system.

[0022] The charging circuit includes a first electromagnetic charging switch 71, a voltage stabilizer 8, a second electromagnetic charging switch 74 and a charging ammeter 75. The voltage stabilizer 8 includes a main voltage stabilizing coil 72 and a slave voltage stabilizing coil 73. The main voltage stabilizing coil 72, the slave voltage stabilizing coil 73, the second electromagnetic charging switch 74 and the charging ammeter 75. The self-induction charging coil 4, the first electromagnetic charging switch 71 and the main voltage stabilizing coil 72 are connected to form a second series closed loop. The slave voltage stabilizing coil 73, the second electromagnetic charging switch 74, the charging ammeter 75 and the automobile battery 7 are connected to form a third series closed loop. The first electromagnetic charging switch 71, the second electromagnetic charging switch 74 and the charging ammeter 75 are electrically connected to the automobile main control system.

[0023] The movable charging rack 5 includes a motor 51, a connecting shaft 52, and a hydraulic cylinder. The hydraulic cylinder includes a hydraulic cylinder body 53 and a telescopic arm 54. The end of the telescopic arm 54 is equipped with a self-induction charging coil 4. The motor 51 is fixedly installed at the bottom of the car 3. The output shaft of the motor 51 is vertically fixed to one end of the connecting shaft 52. The other end of the connecting shaft 52 is fixedly connected to the hydraulic cylinder body 53. The electrical signals of the motor 51 and the hydraulic cylinder are connected to the main control system of the car. The movable charging rack 5 can also use an existing mobile device, as long as the self-induction charging coil 4 can be moved to correspond to the self-induction power supply coil 2.

[0024] The bottom of the automobile 3 has a movable charging rack slot at a position corresponding to the movable charging rack 5 . When the automobile 3 does not need to be charged, the movable charging rack 5 is in the movable charging rack slot.

[0025] In the present invention, the power supply ammeter 62 and the charging ammeter 75 may be current sensors.

[0026] When the car enters the parking lot and is in the parking space, the main control system of the car determines whether charging is needed based on the power of the car battery. In one embodiment, when the power of the car battery is less than 60%, charging is needed. Charging can also be controlled manually through the main control system of the car. This requires an additional self-set charging switch. When the switch is manually closed, the main control system of the car directly charges. When charging is completed or interrupted, the main control system of the car controls to disconnect the self-set charging switch.

[0027] If charging is required, the vehicle main control system sends a charging requirement signal to the power supply electromagnetic switch.

[0028] The principle of the utility model is that when a car is in a parking space, a wireless connection is established between the car main control system and the parking lot control system. The car main control system determines whether charging is required based on the amount of power in the car battery. If charging is required, the car main control system sends a charging demand signal (i.e., an opening signal) to the power supply electromagnetic switch through the parking lot control system. After the power supply electromagnetic switch receives the charging demand signal, the power supply electromagnetic switch is turned on, and the power supply provides an alternating current to the self-inductive power supply coil, which generates an alternating magnetic field. At the same time as the car main control system sends a charging demand signal to the power supply electromagnetic switch, the control The motor rotates to make the connecting shaft perpendicular to the ground, and then controls the telescopic arm of the hydraulic cylinder to extend so that the distance between the self-induction charging coil and the self-induction power supply coil 2 is equal to the set distance. The automobile main control system controls the first electromagnetic charging switch and the second electromagnetic charging switch to be connected (closed). The self-induction charging coil generates an alternating current under the action of the alternating magnetic field of the self-induction power supply coil. The alternating current generated by the self-induction charging coil causes the main voltage stabilizing coil to generate an alternating current. The main voltage stabilizing coil generates an alternating magnetic field under the action of the alternating current. The alternating magnetic field causes the slave voltage stabilizing coil to generate an alternating current. The alternating current generated by the slave voltage stabilizing coil charges the automobile battery. When charging is completed, the current of the charging ammeter decreases. When the current value of the charging ammeter is less than or equal to the set value (charging is completed), when the automobile main control system receives the current value of the charging ammeter less than or equal to the set value, it sends a charging completion disconnection signal to the first electromagnetic charging switch and the second electromagnetic charging switch. The first electromagnetic charging switch and the second electromagnetic charging switch are disconnected. The automobile main control system sends a reset signal to the motor and the hydraulic cylinder, and the motor and the hydraulic cylinder are reset. When the car is needed during the charging process (it can be used but not fully charged), the car main control system sends a charging interruption signal to the first electromagnetic charging switch and the second electromagnetic charging switch, and the first electromagnetic charging switch and the second electromagnetic charging switch are disconnected. The car main control system sends a reset signal to the motor and the hydraulic cylinder, and the motor and the hydraulic cylinder are reset. When the parking lot control system detects that the current of the power supply ammeter is less than the current setting value within 3 minutes, the power supply electromagnetic switch is disconnected.

Claims

1. A car charging system, characterized in that: The invention comprises a self-induction power supply coil (2) buried at the bottom of a car parking space (1), a movable charging frame (5) installed at the bottom of a car (3), a self-induction charging coil (4) installed at the end of the movable charging frame (5), a charging circuit, a power supply circuit, a car main control system and a parking control system, wherein the self-induction power supply coil (2) is connected to a power supply (6) via the power supply circuit, and the self-induction charging coil (4) is connected to a car storage battery (7) via the charging circuit; when charging, the car (3) is in the car parking space (1), the axis of the self-induction charging coil (4) is parallel to the axis of the self-induction power supply coil (2), the distance between the self-induction charging coil (4) and the self-induction power supply coil (2) is equal to a set distance, and the projection of the self-induction charging coil (4) on the ground is within the projection of the self-induction power supply coil (2) on the ground.

2. The vehicle charging system according to claim 1, characterized in that: The power supply circuit comprises a power supply electromagnetic switch (61), a power supply ammeter (62), and a self-inductive power supply coil (2); the self-inductive power supply coil (2), the power supply electromagnetic switch (61), a power supply source (6), and the power supply ammeter (62) are connected to form a first series closed loop; and electrical signals of the power supply ammeter (62) and the power supply electromagnetic switch (61) are connected to a parking lot control system.

3. The vehicle charging system according to claim 1, characterized in that: The charging circuit comprises a first electromagnetic charging switch (71), a voltage stabilizer (8), a second electromagnetic charging switch (74) and a charging ammeter (75); the voltage stabilizer (8) comprises a main voltage stabilizing coil (72) and a slave voltage stabilizing coil (73); the self-inductive charging coil (4), the first electromagnetic charging switch (71) and the main voltage stabilizing coil (72) are connected to form a second series closed loop; the vehicle battery (7), the slave voltage stabilizing coil (73), the second electromagnetic charging switch (74) and the charging ammeter (75) form a third series closed loop; the first electromagnetic charging switch (71), the second electromagnetic charging switch (74) and the charging ammeter (75) are connected to the vehicle main control system via electrical signals.

4. The vehicle charging system according to claim 1, characterized in that: The movable charging rack (5) comprises a motor (51), a connecting shaft (52), and a hydraulic cylinder. The hydraulic cylinder comprises a hydraulic cylinder body (53) and a telescopic arm (54). The end of the telescopic arm (54) is provided with a self-induction charging coil (4). The motor (51) is fixedly mounted on the bottom of the vehicle (3). The output shaft of the motor (51) is vertically fixed to one end of the connecting shaft (52). The other end of the connecting shaft (52) is fixedly connected to the hydraulic cylinder body (53). The electrical signals of the motor (51) and the hydraulic cylinder are connected to the vehicle main control system.

5. The vehicle charging system according to claim 4, characterized in that: A movable charging rack slot is provided at a position corresponding to the movable charging rack (5) at the bottom of the automobile (3); when the automobile (3) does not need to be charged, the movable charging rack (5) is in the movable charging rack slot.

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