AGV static wireless charging system

Abstract

The utility model discloses an AGV static wireless charging system which comprises a ground device and a vehicle-mounted device, the ground device comprises a power supply module, a ground controller, a ground charging control switch, a transmitting coil group and a position detection device, and the transmitting coil group comprises one or more transmitting coils. The transmitting coil is electrically connected with the power supply module through the ground charging control switch and converts an electric signal transmitted by the power supply module into a magnetic field signal; the position detection device comprises two ground induction coils, the two ground induction coils are arranged on the two sides of the transmitting coil set respectively, the ground induction coils and the ground charging control switch are electrically connected with the ground controller, and the ground controller controls the ground charging control switch to be closed when the two ground induction coils detect the AGV. The vehicle-mounted device comprises a receiving coil and a vehicle-mounted battery which are arranged on the AGV body, the receiving coil receives the magnetic field signal transmitted by the transmitting coil group and converts the magnetic field signal into an electric signal, and the receiving coil is electrically connected with the vehicle-mounted battery and transmits the electric signal to the vehicle-mounted battery. According to the utility model, wireless charging of the AGV is realized, and entity connection is not needed; the charging process is safe and reliable, no electric spark exists during large-current charging, and the system is low in magnetic flux leakage, safe and free of electric leakage due to the arrangement of the position detection device and the two ground induction coils.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power, and more specifically, to an AGV static wireless charging system. Background Art

[0002] At present, the palletizing and handling work in the warehousing and manufacturing industry is basically completed by all-electric unmanned automatic guided vehicles (AGVs), which realize intelligent transportation and greatly improve work efficiency. However, after working for a period of time, AGVs need to be charged. Existing AGVs mainly use wired charging. When the AGV is low on power, it is guided by the ground control center to the designated charging area or charging station, and the AGV and the charger are electrically connected manually. Wired charging can cause poor contact and even sparks, posing a major safety hazard. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model innovatively provides an AGV static wireless charging system, which realizes wireless charging of AGV without the need for physical connection; the charging process is safe and reliable, and there is no electric spark during high current charging; the position detection device - the setting of two ground sensing coils makes the system low in magnetic leakage and safe without leakage.

[0004] In order to achieve the above technical objectives, the utility model discloses an AGV static wireless charging system, including a ground device and a vehicle-mounted device.

[0005] The ground device includes a power module, a ground controller, a ground charging control switch, a transmitting coil group and a position detection device. The transmitting coil group includes one or more transmitting coils, and the transmitting coil is electrically connected to the power module through the ground charging control switch. The transmitting coil converts the electrical signal transmitted by the power module into a magnetic field signal; the position detection device includes two ground sensing coils, and the two ground sensing coils are respectively arranged on both sides of the transmitting coil group. The ground sensing coil and the ground charging control switch are respectively electrically connected to the ground controller. When the two ground sensing coils detect the AGV, the ground controller controls the ground charging control switch to be closed.

[0006] The vehicle-mounted device includes a receiving coil and a vehicle-mounted battery arranged on the AGV body. The receiving coil receives the magnetic field signal emitted by the transmitting coil group and converts the magnetic field signal into an electrical signal. The receiving coil is electrically connected to the vehicle-mounted battery and transmits the electrical signal to the vehicle-mounted battery.

[0007] Furthermore, the straight-line distance between the edges of the two ground sensor coils that are away from each other is equal to the straight-line distance between the front and rear of the AGV.

[0008] Furthermore, the vehicle-mounted device also includes a power detection device and a vehicle-mounted controller arranged on the AGV body, the power detection device is electrically connected to the vehicle-mounted battery and the vehicle-mounted controller respectively, and the vehicle-mounted controller is communicatively connected to the ground controller.

[0009] Furthermore, an on-board charging control switch is connected between the receiving coil and the on-board battery, and the on-board charging control switch is electrically connected to the on-board controller.

[0010] Furthermore, the power module includes an input power supply and a power converter, the input power supply is direct current, the power converter is a DC-AC inverter, the input end of the power converter is electrically connected to the input power supply, the output end of the power converter is electrically connected to the transmitting coil through the ground charging control switch, and the power converter converts direct current into high-frequency alternating current and transmits it to the transmitting coil.

[0011] Furthermore, the power module includes an input power supply and a power converter, the input power supply is alternating current, the power converter is an AC-AC converter, the input end of the power converter is electrically connected to the input power supply, the output end of the power converter is electrically connected to the transmitting coil through the ground charging control switch, and the power converter converts the alternating current into high-frequency alternating current and transmits it to the transmitting coil.

[0012] Furthermore, the ground charging control switch is electrically connected to the ground controller via a wired optical fiber or a wireless communication device.

[0013] Furthermore, the vehicle-mounted controller is communicatively connected with the ground controller via a wireless communication device.

[0014] The beneficial effects of the utility model are:

[0015] The AGV static wireless charging system of the utility model realizes wireless charging of AGV without physical connection; the charging process is safe and reliable, there is no electric spark during high current charging, and the position detection device - the setting of two ground sensing coils makes the system low in magnetic leakage and safe without leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an AGV static wireless charging system according to an embodiment of the utility model.

[0017] In the figure,

[0018] 1. Power module; 11. Input power; 12. Power converter; 2. Ground controller; 3. Ground charging control switch; 4. Transmitting coil group; 41. Transmitting coil; 5. Position detection device; 51. Ground sensing coil; 6. Receiving coil; 7. On-board battery; 8. Power detection device; 9. On-board controller; 10. On-board charging control switch. DETAILED DESCRIPTION

[0019] The AGV static wireless charging system provided by the utility model is explained and illustrated in detail below in conjunction with the drawings of the specification.

[0020] This embodiment specifically discloses an AGV static wireless charging system, such as Figure 1 As shown, it includes a ground device and a vehicle-mounted device. The ground device includes a power module 1, a ground controller 2, a ground charging control switch 3, a transmitting coil group 4 and a position detection device 5. The power module 1 is used to provide high-frequency alternating current to the transmitting coil group 4. The transmitting coil group 4 includes one or more transmitting coils 41. The transmitting coil 41 is electrically connected to the power module 1 through the ground charging control switch 3. The ground charging control switch 3 is used to control the on-off of the circuit connection between the power module 1 and the transmitting coil 41, that is, to control the on-off of the power supply module 1 to the transmitting coil 41. The number of ground charging control switches 3 is the same as the number of transmitting coils 41. The ground charging control switches 3 are connected to the transmitting coils 41 in a one-to-one correspondence. The transmitting coil 41 converts the electrical signal transmitted by the power module 1 into a magnetic field signal The position detection device 5 includes two ground sensing coils 51, which are respectively arranged on both sides of the transmitting coil group 4. Preferably, the number of transmitting coils 41 in the transmitting coil group 4 is at least two to improve the charging efficiency. The transmitting coils 41 in the transmitting coil group 4 are arranged in an array, and the length of the transmitting coil group 4 is less than the length of the AGV, and the width of the transmitting coil group 4 is less than the width of the AGV, so that the AGV can cover the top of the transmitting coil group 4 and the two ground sensing coils 51 can be directly below the AGV. The ground sensing coil 51 and the ground charging control switch 3 are respectively electrically connected to the ground controller 2. The ground sensing coil 51 can be electrically connected to the ground controller 2 through a wire. The ground controller 2 controls the ground charging control switch 3 to close when the two ground sensing coils 51 detect the AGV. When the AGV is above the two ground sensing coils 51, the oscillation frequencies of the two ground sensing coils 51 change and transmit this signal to the ground controller 2, indicating that the AGV has reached the specified position. At this time, the ground controller 2 controls the ground charging control switch 3 to close, so that the power module 1 and the transmitting coil 41 are electrically connected, and the transmitting coil 41 emits a magnetic field signal.

[0021] The vehicle-mounted device includes a receiving coil 6 and a vehicle-mounted battery 7 arranged on the AGV body. The receiving coil 6 receives the magnetic field signal emitted by the transmitting coil group 4 and converts the magnetic field signal into an electrical signal. The receiving coil 6 is electrically connected to the vehicle-mounted battery 7 and transmits the electrical signal to the vehicle-mounted battery 7 to charge the vehicle-mounted battery 7.

[0022] Furthermore, the straight-line distance between the edges of the two ground sensor coils 51 that are away from each other is equal to the straight-line distance between the front and rear of the AGV, that is, the two ground sensor coils 51 can face the front and rear of the AGV respectively. When the AGV is above the transmitting coil group 4 and the front of the AGV is aligned with the front ground sensor coil 51 and the rear of the AGV is aligned with the rear ground sensor coil 51, the oscillation frequencies of the two ground sensor coils change, indicating that the AGV has reached the designated charging position and can be charged, which can reduce the leakage magnetic field of the system during charging.

[0023] In some embodiments, the vehicle-mounted device further includes a power detection device 8 and a vehicle-mounted controller 9 disposed on the AGV body, the power detection device 8 is electrically connected to the vehicle-mounted battery 7 and the vehicle-mounted controller 9 respectively, and the vehicle-mounted controller 9 is communicatively connected to the ground controller 2. The power detection device 8 can detect the power of the vehicle-mounted battery 7, and transmit the power information of the vehicle-mounted battery 7 to the vehicle-mounted controller 9, and the vehicle-mounted controller 9 synchronously communicates the power information of the vehicle-mounted battery 7 to the ground controller 2. When the vehicle-mounted battery 7 is charged to a preset value or is fully charged, the ground controller 2 controls the ground charging control switch 3 to be disconnected, and the vehicle-mounted battery 7 is no longer charged, and the AGV can then leave the area where the transmitting coil group 4 is located.

[0024] Furthermore, an on-board charging control switch 10 is connected between the receiving coil 6 and the on-board battery 7, and the on-board charging control switch 10 is electrically connected to the on-board controller 9. The setting of the on-board charging control switch 10 further ensures the reliability of charging. When the power detection device 8 detects that the on-board battery 7 is low on power, the on-board controller 9 controls the on-board charging control switch 10 to close, and at the same time, the ground controller 2 controls the ground charging control switch 3 to close, so that the charging circuit formed by the power module 1, the transmitting coil 41, the receiving coil 6 and the on-board battery 7 is fully turned on to charge the on-board battery 7; when the power detection device 8 detects that the power of the on-board battery 7 reaches a preset value or is full, one of the on-board charging control switch 10 and the ground charging control switch 3 is disconnected, and the charging circuit is disconnected. Preferably, the on-board charging control switch 10 and the ground charging control switch 3 are disconnected at the same time to avoid overcharging of the on-board battery and ensure the reliability of charging.

[0025] Optionally, the power module 1 includes an input power supply 11 and a power converter 12, the input power supply 11 is direct current, the power converter 12 is a DC-AC inverter, the input end of the power converter 12 is electrically connected to the input power supply 11, and the output end of the power converter 12 is electrically connected to the transmitting coil 41 through the ground charging control switch 3. The power converter 12 converts direct current into high-frequency alternating current and transmits it to the transmitting coil 41. The input power supply 11 can be a photovoltaic power station, such as a 750V DC bus.

[0026] Optionally, the power module 1 includes an input power supply 11 and a power converter 12, the input power supply 11 is alternating current, which may be 380V alternating current, the power converter 12 is an AC-AC converter, the input end of the power converter 12 is electrically connected to the input power supply 11, and the output end of the power converter 12 is electrically connected to the transmitting coil 41 through the ground charging control switch 3, and the power converter 12 converts the alternating current into high-frequency alternating current and transmits it to the transmitting coil 41.

[0027] In this embodiment, the ground charging control switch 3 is electrically connected to the ground controller 2 through a wired optical fiber or a wireless communication device; the vehicle-mounted charging control switch 10 is also electrically connected to the vehicle-mounted controller 9 through a wired optical fiber or a wireless communication device; the wireless communication device can be a WIFI device, a Bluetooth device, a wireless radio frequency device, etc. The vehicle-mounted controller 9 is connected to the ground controller 2 through a wireless communication device; the wireless communication device can be a WIFI device, a Bluetooth device, a wireless radio frequency device, etc. Intelligent control and intelligent information interaction of AGV static charging can be realized, and the overall system can achieve low-delay control response.

[0028] The control methods of the ground controller and the vehicle-mounted controller are both existing control methods, which are attributes of the controllers themselves. The ground controller and the vehicle-mounted controller can use existing control chips.

[0029] The working process of the AGV static wireless charging system of the present application is as follows: a. When the AGV enters the area where the transmitting coil group 4 and the ground sensing coil 51 are located, the body of the AGV emits a high-frequency signal; b. After the ground sensing coil 51 receives the high-frequency signal and the oscillation frequency changes, it communicates to the ground controller 2 at high speed; c. The ground controller 2 receives the signal and determines that the AGV has arrived at the designated charging position; d. The ground controller 2 exchanges information with the on-board controller 9 and closes the on-board charging control switch 10 and the ground charging control switch 3 at the same time; e. The transmitting coil 41 and the receiving coil 6 transmit energy; f. When the on-board battery power of the AGV reaches the preset value or is fully charged, the on-board charging control switch 10 and the ground charging control switch 3 are disconnected, the power is cut off, and the AGV leaves the charging area.

[0030] The entire charging process is intelligent and does not require physical connection; the charging process is safe and reliable, there is no electric spark during high current charging, and the arrangement of two ground sensing coils 51 makes the system low in magnetic leakage and safe without leakage. The system of the present application is suitable for application in various environmental conditions and has broad prospects for promotion.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the description of this specification, the description with reference to the terms "this embodiment", "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any at least one embodiment or example. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution and simple improvement made to the essential content of the present invention shall be included in the protection scope of the present invention.

Claims

1. An AGV static wireless charging system, It is characterized in that Including ground devices and vehicle-mounted devices, The ground device comprises a power module (1), a ground controller (2), a ground charging control switch (3), a transmitting coil group (4) and a position detection device (5). The transmitting coil group (4) comprises one or more transmitting coils (41). The transmitting coil (41) is electrically connected to the power module (1) through the ground charging control switch (3). The transmitting coil (41) converts the electrical signal transmitted by the power module (1) into a magnetic field signal. The position detection device (5) comprises two ground sensing coils (51). The two ground sensing coils (51) are respectively arranged on both sides of the transmitting coil group (4). The ground sensing coils (51) and the ground charging control switch (3) are respectively electrically connected to the ground controller (2). When the two ground sensing coils (51) detect the AGV, the ground controller (2) controls the ground charging control switch (3) to close. The vehicle-mounted device comprises a receiving coil (6) and a vehicle-mounted battery (7) arranged on the AGV body; the receiving coil (6) receives the magnetic field signal emitted by the transmitting coil group (4) and converts the magnetic field signal into an electrical signal; the receiving coil (6) is electrically connected to the vehicle-mounted battery (7) and transmits the electrical signal to the vehicle-mounted battery (7).

2. The AGV static wireless charging system according to claim 1, It is characterized in that The straight-line distance between the edges of the two ground sensor coils (51) that are away from each other is equal to the straight-line distance between the front and rear of the AGV.

3. The AGV static wireless charging system according to claim 1, It is characterized in that The vehicle-mounted device also includes a power detection device (8) and a vehicle-mounted controller (9) arranged on the AGV body, the power detection device (8) being electrically connected to the vehicle-mounted battery (7) and the vehicle-mounted controller (9) respectively, and the vehicle-mounted controller (9) being communicatively connected to the ground controller (2).

4. The AGV static wireless charging system according to claim 3, It is characterized in that An on-board charging control switch (10) is connected between the receiving coil (6) and the on-board battery (7), and the on-board charging control switch (10) is electrically connected to the on-board controller (9).

5. The AGV static wireless charging system according to claim 1, It is characterized in that The power module (1) comprises an input power supply (11) and a power converter (12); the input power supply (11) is direct current; the power converter (12) is a DC-AC inverter; an input end of the power converter (12) is electrically connected to the input power supply (11); an output end of the power converter (12) is electrically connected to the transmitting coil (41) via the ground charging control switch (3); and the power converter (12) converts direct current into high-frequency alternating current and transmits the converted alternating current to the transmitting coil (41).

6. The AGV static wireless charging system according to claim 1, It is characterized in that The power module (1) comprises an input power supply (11) and a power converter (12); the input power supply (11) is alternating current; the power converter (12) is an AC-AC converter; an input end of the power converter (12) is electrically connected to the input power supply (11); an output end of the power converter (12) is electrically connected to the transmitting coil (41) via the ground charging control switch (3); and the power converter (12) converts the alternating current into high-frequency alternating current and transmits it to the transmitting coil (41).

7. The AGV static wireless charging system according to claim 1, It is characterized in that The ground charging control switch (3) is electrically connected to the ground controller (2) via a wired optical fiber or a wireless communication device.

8. The AGV static wireless charging system according to claim 3, It is characterized in that The onboard controller (9) is communicatively connected to the ground controller (2) via a wireless communication device.

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