Electric forklift charging and battery replacing system, charging and battery replacing method and electric forklift

Abstract

The invention relates to the technical field of electric forklifts, in particular to an electric forklift battery charging and replacing system, a battery charging and replacing method and an electric forklift. The electric forklift charging and battery replacing system comprises a wireless charging device, a vehicle-mounted battery fixing and battery replacing device, a first power battery, a second power battery, a first battery storage device and a second battery storage device. When the stored energy of the first power battery installed on the electric forklift cannot meet the operation requirement of the electric forklift, the first power battery can be charged through the wireless charging device; meanwhile, the first power battery can be taken out of the electric forklift through the vehicle-mounted fixing and battery replacing device and placed on the second battery storage device, then the fully-charged second power battery is taken out of the first battery storage device and installed and fixed to the electric forklift, and battery replacing of the electric forklift is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of electric forklifts, and more specifically, to an electric forklift charging and replacement system, a charging and replacement method, and an electric forklift. Background Art

[0002] As an important handling tool in modern logistics and warehousing, electric forklifts have the advantages of no emissions, low noise, and low maintenance costs. At present, there are two common ways to recharge electric forklifts: conductive charging and replacing power batteries.

[0003] Conductive charging can be divided into on-board charger charging and ground charging pile charging. Since conductive charging requires laying charging cables, and the charging cables must be manually connected to the power battery on the vehicle, the operation process is relatively cumbersome, and the charging process is difficult to achieve intelligent or automatic completion. This undoubtedly increases the charging cost and maintenance cost.

[0004] The battery replacement method can achieve rapid energy replenishment for electric forklifts, and it can also help maintain the battery and improve the operating efficiency of electric forklifts. At present, most batteries replaced from electric forklifts are still charged by conduction, which means that during the battery replacement process, the original battery of the electric forklift needs to be powered off, disassembled, connected to cables, and charged, and the fully charged battery to be loaded needs to be powered off, cables removed, loaded, and fixed. The battery replacement process is relatively complicated, which increases labor costs, and it is easy to cause damage to the battery or forklift due to misoperation. Summary of the invention

[0005] The present application provides an electric forklift charging and battery replacement system, a charging and battery replacement method and an electric forklift to solve the problems of complicated operation, easy misoperation, high charging and maintenance costs in the electric forklift charging or battery replacement technology in the background technology.

[0006] According to a first aspect of the present application, there is provided an electric forklift charging and battery replacement system, comprising: a wireless charging device, an on-board battery fixing and battery replacement device, a first power battery, a second power battery, a first battery storage device and a second battery storage device;

[0007] The first power battery or the second power battery is installed on the electric forklift to provide the required power for the operation or operation of the electric forklift;

[0008] The first battery storage device is used to store the first power battery or the second power battery;

[0009] The second battery storage device is used to store the first power battery or the second power battery;

[0010] One of the power batteries is placed on the electric forklift for operation of the forklift, and the other power battery is placed on the first battery storage device or the second battery storage device;

[0011] The wireless charging device includes: a first transmitting end controller, a first transmitting coil, a first receiving coil, a first receiving end controller, a second transmitting end controller, a second transmitting coil, a second receiving coil, a second receiving end controller, a third transmitting end controller, a third transmitting coil, a third receiving coil and a third receiving end controller;

[0012] The first receiving coil and the first receiving end controller are installed on the first battery storage device;

[0013] The first transmitting coil and the first transmitting end controller are installed on the ground where the first battery storage device is located;

[0014] The first transmitting coil and the first receiving coil are placed parallel and aligned;

[0015] The first transmitting end controller, the first transmitting coil, the first receiving coil and the first receiving end controller are capable of converting 50Hz AC power from the power grid into DC power and charging the power battery on the first battery storage device;

[0016] The second receiving coil and the second receiving end controller are installed on the second battery storage device;

[0017] The second transmitting coil and the second transmitting end controller are installed on the ground where the second battery storage device is located;

[0018] The second transmitting coil and the second receiving coil are placed parallel and aligned;

[0019] The second transmitting end controller, the second transmitting coil, the second receiving coil and the second receiving end controller can convert the 50Hz AC power of the power grid into DC power and charge the power battery on the second battery storage device;

[0020] The third receiving coil and the third receiving end controller are installed on the electric forklift;

[0021] The third transmitting coil and the third transmitting end controller are installed on the ground of the charging and battery replacement area of ​​the electric forklift;

[0022] When parked directly above the third transmitting coil in the charging and swapping area of ​​the electric forklift, the third transmitting coil and the third receiving coil are placed parallel and aligned;

[0023] The third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller can convert the 50Hz AC power of the power grid into DC power and charge the power battery on the electric forklift;

[0024] The on-board battery fixing and battery replacement device is installed on the electric forklift, so that the first power battery can be reliably fixed on the electric forklift and the power supply end of the first power battery can be reliably connected to the load cable on the vehicle;

[0025] During the battery replacement process, the on-board battery fixing and battery replacement device can push the first power battery out of the electric forklift and place it on the first battery storage device;

[0026] In addition, the on-board battery fixing and battery replacement device can also remove the battery placed on the second battery storage device and pull it into and fix it on the electric forklift;

[0027] During the battery replacement process, the energy required for the vehicle battery fixing and the battery replacement device to work is provided by the wireless charging system through the third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller;

[0028] The first battery storage device and the second battery storage device are used to store power batteries and charge the power batteries through the wireless charging device;

[0029] According to a second aspect of the present application, a method for charging and replacing an electric forklift is provided, comprising the following steps:

[0030] The electric forklift is parked in the charging and swapping area, and the third transmitting coil and the third receiving coil are ensured to be parallel and aligned;

[0031] In charging mode:

[0032] The wireless charging device charges the first power battery on the electric forklift through the third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller;

[0033] If the first power battery is fully charged, the third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller stop operating;

[0034] After charging is completed, the electric forklift can leave the charging and swapping area and start working.

[0035] When using the battery swap mode:

[0036] The wireless charging device provides electric energy to the vehicle battery fixing and battery replacement device through the third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller;

[0037] The on-board battery fixing and battery replacement device pushes the first power battery out of the electric forklift and places it on the second battery storage device;

[0038] The on-board battery fixing and battery replacement device takes out the fully charged second power battery from the first battery storage device, pulls it into the electric forklift and fixes it;

[0039] After the battery replacement is completed, the electric forklift can leave the charging and replacement area and start working;

[0040] At the same time, the wireless charging device charges the first power battery through the second transmitting end controller, the second transmitting coil, the second receiving coil and the second receiving end controller;

[0041] If the first power battery is fully charged, the second transmitting end controller, the second transmitting coil, the second receiving coil and the second receiving end controller stop operating;

[0042] According to a third aspect of the present application, an electric forklift is provided, which adopts the electric forklift charging and replacing system described in the first aspect of the present application or the electric forklift charging and replacing method described in the second aspect of the present application.

[0043] The present application relates to the technical field of electric forklifts, and specifically, to an electric forklift charging and swapping system, a charging and swapping method, and an electric forklift. The electric forklift charging and swapping system includes a wireless charging device, an on-board battery fixing and swapping device, a first power battery, a second power battery, a first battery storage device, and a second battery storage device. When the first power battery storage energy installed on the electric forklift cannot meet the operating needs of the electric forklift, the first power battery can be charged by a wireless charging device; at the same time, the first power battery can be taken out from the electric forklift and placed on the second battery storage device through the on-board fixing and battery swapping device, and then the fully charged second power battery can be taken out from the first battery storage device and installed and fixed on the electric forklift to achieve the replacement of the electric forklift; in addition, the wireless charging device can charge the power battery placed in the battery storage device that needs to be charged. The charging and swapping system combines wireless charging and battery swapping technologies to realize multiple ways of energy replenishment for the power battery, solving the problems of cumbersome operation, easy misoperation, and high charging and maintenance costs during the charging or energy replenishment of electric forklifts. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above-mentioned and / or additional aspects and advantages of the present application will become apparent and easy to understand, and constitute a part of the specification, and together with the embodiments of the present application are used to explain the present application, and do not constitute a limitation on the present application. In the accompanying drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. Among them:

[0045] Figure 1 A schematic diagram of the composition of an electric forklift charging and battery replacement system provided according to an embodiment of the present application;

[0046] Figure 2 A schematic diagram of the composition of a wireless charging device in an electric forklift charging and swapping system provided according to an embodiment of the present application;

[0047] Figure 3A schematic diagram of the arrangement of the electric forklift charging and swapping system provided according to an embodiment of the present application when the electric forklift is located in the charging and swapping area;

[0048] Figure 4 A layout diagram of some components of a first battery storage device, a second battery storage device, and a wireless charging device in an electric forklift charging and swapping system provided according to an embodiment of the present application;

[0049] Figure 5 It is a layout diagram of the first transmitting coil, the second transmitting coil and the third transmitting coil of the wireless charging device in the electric forklift charging and swapping system provided according to an embodiment of the present application;

[0050] Figure 6 A flow chart of a method for charging and replacing a battery in an electric forklift according to an embodiment of the present application;

[0051] Figure 7 A schematic diagram of a charging mode for an electric forklift provided according to an embodiment of the present application;

[0052] Figure 8 A schematic diagram of an electric forklift according to an embodiment of the present application working in a battery replacement mode, wherein a first power battery is pushed out of the electric forklift and placed in a second battery storage device;

[0053] Fig. 9 Schematic diagram of taking out the second power battery from the first battery storage device and installing and fixing it on the electric forklift when the electric forklift provided in an embodiment of the present application works in the battery replacement mode. DETAILED DESCRIPTION

[0054] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0055] A charging and battery replacement system for an electric forklift, comprising: a wireless charging device, an on-board battery fixing and battery replacement device, a first power battery, a second power battery, a first battery storage device and a second battery storage device.

[0056] The wireless charging device includes: a first transmitting end controller, a first transmitting coil, a first receiving coil, a first receiving end controller, a second transmitting end controller, a second transmitting coil, a second receiving coil, a second receiving end controller, a third transmitting end controller, a third transmitting coil, a third receiving coil and a third receiving end controller.

[0057] The first transmitting end controller, the first transmitting coil, the first receiving coil and the first receiving end controller can charge the power battery on the second battery storage device;

[0058] The second transmitting end controller, the second transmitting coil, the second receiving coil and the second receiving end controller can charge the power battery on the first battery storage device;

[0059] The third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller can charge the power battery on the electric forklift.

[0060] The on-board battery fixing and battery replacement device can remove the power battery from the electric forklift and place it in the first battery storage device or the second battery storage device; the on-board battery fixing and battery replacement device can remove the power battery from the first battery storage device or the second battery storage device and install and fix it on the electric forklift.

[0061] The control method of the electric forklift charging and battery replacement system includes the following steps:

[0062] The electric forklift is parked in the charging and swapping area, and the third transmitting coil and the third receiving coil are ensured to be parallel and aligned.

[0063] In charging mode:

[0064] The wireless charging device charges the first power battery on the vehicle through the third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller;

[0065] If the first power battery is fully charged, the third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller stop running.

[0066] After charging is completed, the electric forklift can leave the charging and swapping area and start working.

[0067] When using the battery swap mode:

[0068] The wireless charging device provides electric energy to the vehicle battery fixing and battery replacement device through the third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller;

[0069] The on-board battery fixing and battery replacement device pushes the first power battery out of the electric forklift and places it on the second battery storage device;

[0070] The on-board battery fixing and battery replacement device takes out the fully charged second power battery from the first battery storage device, pulls it into the electric forklift and fixes it.

[0071] After the battery replacement is completed, the electric forklift can leave the charging and replacement area and start working;

[0072] At the same time, the wireless charging device charges the first power battery through the second transmitting end controller, the second transmitting coil, the second receiving coil and the second receiving end controller;

[0073] If the first power battery is fully charged, the second transmitting end controller, the second transmitting coil, the second receiving coil and the second receiving end controller stop running.

[0074] The embodiments of the present application provide an electric forklift charging and battery replacement system, a charging and battery replacement method, and an electric forklift to solve the problems of complicated operation, easy misoperation, and high charging and maintenance costs in the electric forklift charging or battery replacement technology in the background technology.

[0075] A first aspect of the present application provides an electric forklift charging and battery replacement system.

[0076] Specifically, Figure 1 This is a schematic diagram of the composition of an electric forklift charging and battery replacement system 10 provided according to an embodiment of the present application.

[0077] like Figure 1 As shown, the electric forklift charging and battery replacement system 10 includes a wireless charging device 100, a vehicle-mounted battery fixing and battery replacement device 200, a first power battery 300, a second power battery 400, a first battery storage device 500 and a second battery storage device 600.

[0078] Figure 2 Schematic diagram of the composition of the wireless charging device 100 in the electric forklift charging and swapping system 10 provided according to an embodiment of the present application.

[0079] like Figure 2 As shown, the wireless charging device 100 includes a first transmitting end controller 101, a first transmitting coil 102, a first receiving coil 103, a first receiving end controller 104, a second transmitting end controller 105, a second transmitting coil 106, a second receiving coil 107, a second receiving end controller 108, a third transmitting end controller 109, a third transmitting coil 110, a third receiving coil 111 and a third receiving end controller 112.

[0080] The first transmitting end controller 101 converts the 50 Hz AC power provided by the power grid into 85 kHz AC power, and then provides it to the first transmitting coil 102; the first transmitting coil 102 wirelessly transmits the 85 kHz AC power to the first receiving coil 103 through magnetic field coupling; the first receiving coil 103 provides the obtained 85 kHz AC power to the first receiving end controller 104, and the first receiving end controller 104 converts the 85 kHz AC power obtained from the first receiving coil 103 into DC power, which can be used to charge the power battery on the first battery storage device.

[0081] The second transmitting end controller 105 converts the 50 Hz AC power provided by the power grid into 85 kHz AC power, and then provides it to the second transmitting coil 106; the second transmitting coil 106 wirelessly transmits the 85 kHz AC power to the second receiving coil 107 through magnetic field coupling; the second receiving coil 107 provides the obtained 85 kHz AC power to the second receiving end controller 108, and the second receiving end controller 108 converts the 85 kHz AC power obtained from the second receiving coil 107 into DC power, which can be used to charge the power battery on the second battery storage device.

[0082] The third transmitting end controller 109 converts the 50Hz AC power provided by the power grid into 85kHz AC power, and then provides it to the third transmitting coil 110; the third transmitting coil 110 wirelessly transmits the 85kHz AC power to the third receiving coil 111 through magnetic field coupling; the third receiving coil 111 provides the obtained 85kHz AC power to the third receiving end controller 112, and the third receiving end controller 112 converts the 85kHz AC power obtained from the third receiving coil 111 into DC power, which can be used to charge the power battery on the electric forklift. It can also provide power for the battery fixing and battery replacement device 200.

[0083] Figure 3 It is a schematic diagram of the arrangement of the electric forklift charging and swapping system 10 provided according to an embodiment of the present application when the electric forklift is located in the charging and swapping area.

[0084] like Figure 3 As shown, the first power battery 300 is fixed on the electric forklift through the vehicle-mounted battery fixing and the battery replacement device 200 to provide power for the operation of the electric forklift; the third receiving coil 111 and the third receiving end controller 112 in the wireless charging system 100 are installed on the electric forklift, wherein the third receiving coil 111 is installed on the chassis of the electric forklift, and when the electric forklift is parked directly above the third transmitting coil 110 fixed to the ground, the third transmitting coil 110 and the third receiving coil 111 are in a parallel and aligned relative position.

[0085] Furthermore, when the vehicle-mounted battery fixing and battery replacement device 200 is working, electric energy can be provided by the third transmitting end controller 109 , the third transmitting coil 110 , the third receiving coil 111 and the third receiving end controller 112 of the wireless charging device 100 .

[0086] Figure 4 This is a layout diagram of some components of the first battery storage device 500, the second battery storage device 600 and the wireless charging device 100 in the electric forklift charging and swapping system 10 provided according to an embodiment of the present application.

[0087] The first transmitting coil 102 of the wireless charging device 100 is installed on the ground where the first battery storage device 500 is located, the first receiving coil 103, the first receiving end controller 104 and the second power battery 400 are placed on the first battery storage device 500, and the first transmitting coil 102 and the first receiving coil 103 are kept parallel and aligned. The first transmitting end controller 101, the first transmitting coil 102, the first receiving coil 103 and the first receiving end controller 104 can charge the second power battery 400. When the charging is completed, the first transmitting end controller 101, the first transmitting coil 102, the first receiving coil 103 and the first receiving end controller 104 stop working; the second transmitting coil 106 of the wireless charging device 100 is installed on the ground where the second battery storage device 600 is located, the second receiving coil 107 and the second receiving end controller 108 are placed on the second battery storage device 600, and the second transmitting coil 106 and the second receiving coil 108 are kept parallel and aligned. If the first power battery 300 is placed on the second battery storage device, the second transmitting end controller 105, the second transmitting coil 106, the second receiving coil 107 and the second receiving end controller 108 can charge the first power battery 300. When charging is completed, the second transmitting end controller 105, the second transmitting coil 106, the second receiving coil 107 and the second receiving end controller 108 stop working.

[0088] Furthermore, the first battery storage device 500 and the second battery storage device 600 are arranged face to face.

[0089] Figure 5 This is a layout diagram of the first transmitting coil 102, the second transmitting coil 106 and the third transmitting coil 110 of the wireless charging device 100 in the electric forklift charging and swapping system 10 provided according to an embodiment of the present application.

[0090] like Figure 4 , Figure 5 As shown, the third transmitting coil 110 of the wireless charging device is located between the first transmitting coil 102 and the second transmitting coil 106, and the centers of the three transmitting coils are located on the same geometric center line. The first transmitting coil 102 and the second transmitting coil 106 are arranged symmetrically with the third transmitting coil 110 as the center.

[0091] A second aspect of the present application provides a method for charging and replacing batteries for an electric forklift.

[0092] Specifically, Figure 6 This is a flow chart of a method for charging and replacing electric forklifts according to an embodiment of the present application.

[0093] like Figure 6 As shown, the electric forklift charging and replacing method provided in the embodiment of the present application is as follows:

[0094] S1: The electric forklift stops in the charging and swapping area, and ensures that the third transmitting coil 110 and the third receiving coil are parallel and aligned.

[0095] S2: Determine whether the electric forklift adopts charging mode or battery replacement mode;

[0096] If using charging mode:

[0097] Figure 7 Schematic diagram of a charging mode for an electric forklift provided according to an embodiment of the present application.

[0098] S3: Figure 7 As shown, the wireless charging device 100 charges the first power battery 300 through the third transmitting end controller 109 , the third transmitting coil 110 , the third receiving coil 111 and the third receiving end controller 112 .

[0099] S4: Determine whether the first power battery 300 is fully charged;

[0100] If the first power battery 300 is not fully charged, return to S3;

[0101] If the first power battery 300 is fully charged, then:

[0102] S5: the third transmitting end controller 109, the third transmitting coil 110, the third receiving coil 111 and the third receiving end controller 112 stop operating.

[0103] S6: Charging is completed, and the electric forklift can leave the charging and battery replacement area and start working.

[0104] If the battery swap mode is adopted:

[0105] Figure 8 A schematic diagram of an electric forklift according to an embodiment of the present application working in a battery replacement mode, wherein a first power battery 300 is pushed out of the electric forklift and placed in a second battery storage device 600;

[0106] Fig. 9 Schematic diagram of taking out the second power battery 400 from the first battery storage device 500 and installing and fixing it on the electric forklift when the electric forklift provided in an embodiment of the present application works in the battery replacement mode.

[0107] S7: The wireless charging device 100 provides electrical energy to the vehicle battery fixing and battery replacement device 200 through the third transmitting end controller 109 , the third transmitting coil 110 , the third receiving coil 111 and the third receiving end controller 112 .

[0108] S8: The vehicle-mounted battery fixing and battery replacement device 200 pushes the first power battery 300 out of the electric forklift and places it on the second battery storage device 600.

[0109] S9: The vehicle-mounted battery fixing and battery replacement device 200 takes out the fully charged second power battery 400 from the first battery storage device 500, pulls it into the electric forklift and fixes it.

[0110] S10: After the battery replacement is completed, the electric forklift can leave the charging and replacement area and start working.

[0111] Further, after S8 is completed, the ejected first power battery enters step S11;

[0112] S11 : the wireless charging device 100 charges the first power battery 300 through the second transmitting end controller 105 , the second transmitting coil 106 , the second receiving coil 107 and the second receiving end controller 108 .

[0113] S12: Determine whether the first power battery 300 is fully charged;

[0114] If the first power battery 300 is not fully charged, return to S11;

[0115] If the first power battery 300 is fully charged, then:

[0116] S13: The second transmitting end controller 105, the second transmitting coil 106, the second receiving coil 107 and the second receiving end controller 108 stop operating.

[0117] The third embodiment of the present application provides an electric forklift, which is characterized by adopting the electric forklift charging and swapping system of the first embodiment or the electric forklift charging and swapping method of the second embodiment. The electric forklift charging and swapping system and the electric forklift charging and swapping method can refer to the above content and will not be repeated here.

[0118] In the description of this specification, the terms "first", "second", "third", etc. 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", "second", "third", etc. may explicitly or implicitly include at least one of the features.

[0119] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

[0120] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric forklift charging and battery replacement system, characterized in that: The electric forklift charging and battery replacement system includes a wireless charging device, a vehicle-mounted battery fixing and battery replacement device, a first power battery, a second power battery, a first battery storage device and a second battery storage device; The first battery storage device is used to store the first power battery or the second power battery; The second battery storage device is used to store the first power battery or the second power battery; The wireless charging device includes a first transmitting end controller, a first transmitting coil, a first receiving coil, a first receiving end controller, a second transmitting end controller, a second transmitting coil, a second receiving coil, a second receiving end controller, a third transmitting end controller, a third transmitting coil, a third receiving coil and a third receiving end controller; The first transmitting end controller converts the 50Hz AC power energy provided by the power grid into 85kHz AC power energy, and then provides it to the first transmitting coil; The first transmitting coil wirelessly transmits 85kHz AC power to the first receiving coil via magnetic field coupling; The first receiving coil provides the obtained 85kHz AC power to the first receiving end controller; The first receiving end controller converts the 85kHz AC power energy obtained from the first receiving coil into DC power energy, and the DC power energy can be used to charge the power battery on the first battery storage device; The second transmitting end controller converts the 50Hz AC power energy provided by the power grid into 85kHz AC power energy, and then provides it to the second transmitting coil; The second transmitting coil wirelessly transmits 85kHz AC power to the second receiving coil via magnetic field coupling; The second receiving coil provides the obtained 85kHz AC power to the second receiving end controller; The second receiving end controller converts the 85kHz AC power energy obtained from the second receiving coil into DC power energy, and the DC power energy can be used to charge the power battery on the second battery storage device; The third transmitting end controller converts the 50Hz AC power energy provided by the power grid into 85kHz AC power energy, and then provides it to the third transmitting coil; The third transmitting coil wirelessly transmits 85kHz AC power to the third receiving coil via magnetic field coupling; The third receiving coil provides the obtained 85kHz AC power to the third receiving end controller, and the third receiving end controller converts the 85kHz AC power obtained from the third receiving coil into DC power, which can be used to charge the power battery on the electric forklift or provide power for the battery fixing and battery replacement device.

2. The electric forklift charging and battery replacement system according to claim 1, characterized in that: The first power battery is fixed on the electric forklift through the vehicle-mounted battery fixing and battery replacement device to provide power for the operation of the electric forklift; The third receiving coil and the third receiving end controller in the wireless charging system are installed on the electric forklift; wherein the third receiving coil is installed on the chassis of the electric forklift, and when the electric forklift is parked directly above the third transmitting coil fixed to the ground, the third transmitting coil and the third receiving coil are in a parallel and aligned relative position.

3. The electric forklift charging and replacement system according to claim 1, characterized in that: When the vehicle-mounted battery fixing and battery replacement device are working, electric energy is provided by the third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller of the wireless charging device.

4. The electric forklift charging and replacement system according to claim 1, characterized in that: The first transmitting coil of the wireless charging device is installed on the ground where the first battery storage device is located, the first receiving coil, the first receiving end controller and the second power battery are placed on the first battery storage device, and the first transmitting coil and the first receiving coil are kept parallel and aligned.

5. The electric forklift charging and battery replacement system according to claim 1, characterized in that: The first transmitting end controller, the first transmitting coil, the first receiving coil and the first receiving end controller are used to charge the second power battery; When charging is completed, the first transmitting end controller, the first transmitting coil, the first receiving coil and the first receiving end controller stop working; The second transmitting coil of the wireless charging device is installed on the ground where the second battery storage device is located; The second receiving coil and the second receiving end controller are placed on the second battery storage device; The second transmitting coil and the second receiving coil are placed parallel and aligned.

6. The electric forklift charging and battery replacement system according to claim 1, characterized in that: If the first power battery is placed on the second battery storage device, then the second transmitting end controller, the second transmitting coil, the second receiving coil and the second receiving end controller are used to charge the first power battery; When charging is completed, the second transmitting end controller, the second transmitting coil, the second receiving coil and the second receiving end controller stop working.

7. The electric forklift charging and battery replacement system according to claim 1, characterized in that: The first battery storage device and the second battery storage device are arranged face to face.

8. The electric forklift charging and replacement system according to claim 1, characterized in that: The third transmitting coil of the wireless charging device is located between the first transmitting coil and the second transmitting coil, and the centers of the three transmitting coils are located on the same geometric center line. The first transmitting coil and the second transmitting coil are arranged symmetrically with the third transmitting coil as the center.

9. A method for charging and replacing electric forklift, characterized in that The steps of this method are: S1, the electric forklift stops in the charging and swapping area, and ensures that the third transmitting coil and the third receiving coil are parallel and aligned; S2, determine whether the electric forklift adopts the charging mode or the battery replacement mode. If the charging mode is adopted, proceed to step S3; if the battery replacement mode is adopted, proceed to step S7; S3, the wireless charging device charges the first power battery through the third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller; S4, determining whether the first power battery 300 is fully charged. If the first power battery 300 is not fully charged, returning to S3; If the first power battery 300 is fully charged, the process proceeds to step S5; S5, the third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller stop running; S6, charging is completed, the electric forklift leaves the charging and battery replacement area and starts working. S7, the wireless charging device provides power to the vehicle battery fixing and battery replacement device through the third transmitting end controller, the third transmitting coil, the third receiving coil and the third receiving end controller; S8, the on-board battery fixing and battery replacement device pushes the first power battery out of the electric forklift and places it on the second battery storage device; S9, the on-board battery fixing and battery replacement device takes out the fully charged second power battery from the first battery storage device, pulls it into the electric forklift and fixes it; S10, the battery replacement is completed, the electric forklift leaves the charging and replacement area and starts operation.

10. The method for charging and replacing electric forklift according to claim 1, characterized in that: In S8, the first power battery ejected enters step S11; S11, the wireless charging device charges the first power battery through the second transmitting end controller, the second transmitting coil, the second receiving coil and the second receiving end controller; S12, determining whether the first power battery is fully charged. If the first power battery is not fully charged, the process returns to S11; if the first power battery 300 is fully charged, the process proceeds to step S13; S13, the second transmitting end controller, the second transmitting coil, the second receiving coil and the second receiving end controller stop running.

Images