Wireless charging and battery replacement cabinet system and control method thereof

Abstract

The application relates to a wireless charging and battery replacement cabinet system and a control method thereof. The system comprises a wireless charging and discharging module, a battery pack, a battery replacement cabinet main body, a battery replacement cabinet direct-current power supply and a wired charger module. The wireless charging and discharging module is used for transmitting the electric energy of the battery replacement cabinet direct-current power supply to the battery pack or transmitting the electric energy in the battery pack to the wired charger module. The wired charger module can select the electric energy of the power grid or the electric energy of the battery pack according to a preset control logic to charge the electric vehicle. The application realizes the hardware and data integration of the battery replacement and charging application scene, reduces the waste of the site and the electric power resource, provides an integrated energy supplement platform for the free selection of the electric vehicle users, provides the convenient charging service without the self-provided charger for the charging users, and eliminates the safety hidden danger caused by the quality problem or matching error of the charger through the real-time data interaction with the vehicle battery.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle battery swapping technology, and in particular to a wireless charging battery swapping cabinet system and its control method. Background Technology

[0002] Currently, electric vehicle battery swapping stations on the market have a single function, primarily used to charge the batteries inside for user replacement. Daily charging of electric vehicles relies on a separate charging station or socket system. These two independent systems not only waste space and electricity resources but also prevent the sharing of user data and operational management.

[0003] Furthermore, current charging methods require users to provide their own chargers, making it impossible for operators to effectively control the quality and safety of chargers. In practice, a significant proportion of fires are caused by substandard chargers or incompatibility with batteries, posing a serious safety hazard.

[0004] Therefore, how to integrate safe and convenient external charging functions on the basis of existing battery swapping cabinets, and realize unified management of battery swapping and charging data, as well as intelligent scheduling of power grid energy (such as peak shaving and valley filling, V2G, etc.), are technical problems that urgently need to be solved in this field. Summary of the Invention

[0005] The present invention aims to solve at least one of the problems mentioned in the background art, and provides a wireless charging battery swapping cabinet system and method with external charging function, which is used for direct charging of electric vehicles outside the cabinet, thereby realizing the integration of battery swapping and charging scenarios, improving energy utilization efficiency, enhancing charging safety, and supporting peak shaving and valley filling of the power grid.

[0006] One technical solution of the present invention is as follows: a wireless charging and battery swapping cabinet system, comprising: a wireless charging and discharging module, a battery pack, a battery swapping cabinet body, a battery swapping cabinet DC power supply, and a wired charger module; The battery swapping cabinet is equipped with multiple charging compartments, which are used to hold battery packs. Each charging compartment and battery pack is equipped with a wireless charging and discharging module. The DC power supply of the battery swapping cabinet is connected to the power grid. The input and output terminals of the wireless charging and discharging module in the battery pack are both connected to the battery. The input terminal of the wireless charging and discharging module in the charging compartment is connected to the DC power supply of the battery swapping cabinet, and the output terminal is connected to the power supply terminal of the wired charger module. The power supply terminal of the wired charger module is also connected to the DC power supply of the battery swapping cabinet. The wireless charging and discharging module is used to transmit electrical energy from the DC power supply of the battery swapping cabinet to the battery pack or to transmit electrical energy from the battery pack to the wired charger module. The wired charger module can select to use either the power grid or the battery pack to charge the electric vehicle according to preset control logic.

[0007] Furthermore, the wireless charging and discharging module includes a coil, a transmitting module, a receiving module, a selection switch, a coil, and a charging and discharging control module. The charging and discharging control module is used to control the selection switch to connect the coil to the transmitting module when the power is supplied; and to control the selection switch to connect the coil to the receiving module when the power is taken from. The input terminal of the transmitting module and the output terminal of the receiving module in the battery pack are both connected to the battery. The input terminal of the transmitting module in the charging compartment is connected to the DC power supply of the battery swapping cabinet, and the output terminal of the receiving module is connected to the power supply terminal of the wired charger module.

[0008] Furthermore, the wired charger module includes: a wired charging control module, a communication module, a DC-DC conversion circuit, a control switch, a switching switch, and a charging plug. The two input terminals of the switching switch are respectively connected to the DC power supply of the battery swapping cabinet and the output terminal of the wireless charging and discharging module in the charging compartment. The wired charging control module is connected to the control terminal of the switching switch. The output terminal of the switching switch is connected to one end of the control switch. The other end of the control switch is connected to the power transmission line of the charging plug. The control terminal of the control switch is connected to the wired charging control module. The communication module is connected to the communication lines of the wired charging control module and the charging plug. The charging plug is connected to the charging port of the electric vehicle to be charged. The wired charging control module controls the switching switch to connect the output of the DC power supply of the battery swapping cabinet or the wireless charging and discharging module in the charging compartment to the DC-DC conversion circuit according to the preset control logic. The wired charging control module communicates with the electric vehicle to be charged through the communication module, and the wired charging control module adjusts the real-time charging power by controlling the DC-DC conversion circuit. The wired charging control module controls the charging process by using a control switch.

[0009] Furthermore, the wired charger module also includes a detection module, which is used to detect the voltage and current data of the DC-DC conversion circuit, and the wired charging control module is connected to the detection module; The wired charging control module receives charging data from the electric vehicle to be charged in real time. When the charging data is abnormal, or when the voltage data and current data are abnormal, the wired charging control module turns off the control switch to stop charging.

[0010] Furthermore, the wired charging control module communicates with the battery swapping cabinet controller via a communication module, and the battery swapping cabinet controller communicates with the user cloud platform. When the electric vehicle to be charged does not have communication capabilities, the user scans a QR code with their mobile phone to enter the user cloud platform. In the user cloud platform, the user selects that the electric vehicle does not have communication capabilities and selects the battery type and battery specifications. The user cloud platform determines the charging power data based on the battery type and battery specifications. The battery swapping cabinet controller receives the charging power data and sends it to the wired charging control module connected to the electric vehicle to be charged.

[0011] Furthermore, when the electric vehicle to be charged has communication capabilities, the user scans a QR code with their mobile phone to enter the user cloud platform. In the user cloud platform, the user selects that the electric vehicle has communication capabilities, and the user cloud platform issues a communication command. The battery swapping cabinet controller sends the communication command to the wired charging control module connected to the electric vehicle to be charged. The wired charging control module communicates with the electric vehicle to be charged to obtain charging power data.

[0012] Furthermore, the control logic includes: When it is during peak power hours and the number / proportion of fully charged battery packs in the charging cabinet is greater than or equal to a preset threshold, the wired charging control module connects the output of the wireless charging and discharging module in the charging compartment to the DC-DC conversion circuit, and uses the power of the battery packs in the cabinet to charge the electric vehicle to be charged. When it is during peak power hours and the number / proportion of fully charged battery packs in the charging cabinet is less than a preset threshold, the wired charging control module connects the DC power supply of the battery swapping cabinet to the DC-DC conversion circuit and uses the power grid to charge the electric vehicle to be charged. During off-peak electricity hours, the wired charging control module connects the DC power supply of the battery swapping cabinet to the DC-DC conversion circuit, using the grid's power to charge the electric vehicles waiting to be charged.

[0013] Furthermore, the user cloud platform can predict short-term battery swapping data based on the historical battery swapping data of each battery swapping cabinet and the weather data of the location of the battery swapping cabinet. Based on the short-term battery swapping prediction data, a preset threshold is determined and sent to the corresponding battery swapping cabinet controller, which then sends it to the wired charging control module.

[0014] Furthermore, the battery swapping cabinet is equipped with a grid feedback device. The input end of the grid feedback device is connected to the output end of the wireless charging and discharging module in the charging compartment, and the input end of the grid feedback device is connected to the power grid. When the power grid needs to perform peak shaving and valley filling, the grid feedback device can feed back the electrical energy in the battery pack to the power grid.

[0015] Another technical solution of the present invention is as follows: a battery swapping cabinet control method, used in any of the wireless charging battery swapping cabinet systems described above, comprising: When it is during peak power hours and the number / proportion of fully charged battery packs in the charging cabinet is greater than or equal to a preset threshold, the power of the battery packs is used to charge the electric vehicle. When it is during peak power hours and the number / proportion of fully charged battery packs in the charging cabinet is less than a preset threshold, or when it is during off-peak power hours, the power grid is used to charge the electric vehicles waiting to be charged.

[0016] Compared with the prior art, the present invention has the following beneficial effects: It has achieved hardware and data integration for battery swapping and charging application scenarios, reduced the waste of space and power resources, and provided electric vehicle users with an integrated energy replenishment platform that allows them to freely choose between charging and battery swapping.

[0017] It provides a convenient charging service for users who do not need to bring their own chargers, and eliminates safety hazards caused by charger quality problems or mismatches by interacting with the vehicle battery in real time.

[0018] It achieves full digital monitoring and intelligent protection of the charging process, enabling immediate response to faults and preventing problems before they occur.

[0019] Support for intelligent power dispatch strategies (such as peak shaving and valley filling, power outage protection, and V2G reverse power supply) can effectively reduce user charging costs, improve the economic efficiency of battery swapping cabinet operation, and support the stable operation of the power grid. Attached Figure Description

[0020] Figure 1 This is a block diagram of the overall structure of the wireless charging and battery swapping cabinet system provided in an embodiment of the present invention.

[0021] Figure 2 The circuit diagram of the wireless charging and discharging module provided in the embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure and connection relationship of a wired charger module provided in an embodiment of the present invention. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0024] In the technical solution of the present invention, Figure 1 This is a structural diagram illustrating the specific structure of a wireless charging and battery swapping cabinet system according to the present invention, as shown below. Figure 1 As shown, the present invention includes: 1. Wireless charging and discharging module; 2. Battery pack; 3. Battery swapping cabinet main body; 4. Battery swapping cabinet DC power supply; 5. Wired charger module. The main body 3 of the battery swapping cabinet is provided with multiple charging compartments, which are used to place battery packs 2. Each charging compartment and battery pack 2 is provided with a wireless charging and discharging module 1. The DC power supply 4 of the battery swapping cabinet is connected to the power grid. The input and output terminals of the wireless charging and discharging module 1 in the battery pack 2 are both connected to the battery cells. The input terminal of the wireless charging and discharging module 1 in the charging compartment is connected to the DC power supply 4 of the battery swapping cabinet, and the output terminal is connected to the power supply terminal of the wired charger module 5. The power supply terminal of the wired charger module 5 is also connected to the DC power supply 4 of the battery swapping cabinet. The wireless charging and discharging module 1 is used to transmit the electrical energy of the DC power supply 4 of the battery swapping cabinet to the battery pack 2 or to transmit the electrical energy of the battery pack 2 to the wired charger module 5. The wired charger module 5 can select to use either the power grid or the battery pack 2 to charge the electric vehicle according to preset control logic.

[0025] The system includes: multiple battery packs 2 with wireless charging and discharging modules 1, a battery swapping cabinet body 3, a DC power supply for the battery swapping cabinet 4, and a wired charger module 5 integrated on the battery swapping cabinet. The battery swapping cabinet body 3 is equipped with multiple charging compartments, and each charging compartment is also equipped with a wireless charging and discharging module 1.

[0026] In this system, the DC power supply 4 of the battery swapping cabinet is connected to the power grid to obtain AC power and convert it to DC power. The input terminal of the wireless charging / discharging module 1 in each charging compartment is connected to this DC power supply, while the output terminal is connected to the power supply terminal of the wired charger module 5. At the same time, the power supply terminal of the wired charger module 5 is also directly connected to the DC power supply 4 of the battery swapping cabinet. The wireless charging / discharging module 1 in the battery pack 2 is connected to the battery cells.

[0027] The core of this architecture lies in the bidirectional transmission capability of the wireless charging and discharging module 1: on the one hand, it can wirelessly transmit the power from the DC power supply 4 of the battery swapping cabinet to the battery pack 2 for regular charging; on the other hand, it can wirelessly transmit the power from the battery pack 2 back to the charging compartment and output it to the wired charger module 5. The wired charger module 5 acts as an intelligent power dispatch center, which can autonomously choose whether to use the power directly supplied by the grid or the power output from the battery pack 2 to charge the electric vehicles outside the cabinet based on preset logic (such as peak and off-peak electricity prices, the number of fully charged batteries in the cabinet).

[0028] This hardware system simultaneously enables both battery charging inside the battery swapping cabinet and electric vehicle charging outside, significantly improving equipment utilization and site efficiency. The intelligent selection of power sources lays the foundation for subsequent peak shaving and valley filling, and reduced operating costs.

[0029] In one embodiment of the present invention, the wireless charging and discharging module 1 includes a coil 21, a transmitting module 22, a receiving module 23, a selection switch 24, a coil 21, and a charging and discharging control module 25. The charging and discharging control module 25 is used to control the selection switch 24 to switch the coil 21 to be connected to the transmitting module 22 when power is supplied; and to control the selection switch 24 to switch the coil 21 to be connected to the receiving module 23 when power is taken. The input terminal of the transmitting module 22 and the output terminal of the receiving module 23 in the battery pack 2 are both connected to the battery cell; The input terminal of the transmitter module 22 in the charging compartment is connected to the DC power supply 4 of the battery swapping cabinet, and the output terminal of the receiver module 23 is connected to the power supply terminal of the wired charger module 5.

[0030] To achieve efficient and reliable contactless bidirectional power transmission, this embodiment features a specific design for the wireless charging and discharging module 1. For example... Figure 2 As shown, the module includes a coil 21, a transmitting module 22, a receiving module 23, a selection switch 24 (e.g., a double-pole double-throw relay), and a charge / discharge control module 25 (e.g., an MCU-based control circuit). The transmitting module 22 and the receiving module 23 are conventional technologies in the field and will not be described in detail here.

[0031] Its specific working method is as follows: Charging (grid charging battery pack 2) mode: The charge / discharge control module 25 controls the selection switch 24 to connect the drive end of coil 21 to the transmitting module 22. The transmitting module 22 obtains electrical energy from the DC power supply 4 of the battery swapping cabinet, converts it into high-frequency AC power to drive coil 21, generating an alternating magnetic field. The receiving coil 21 on the battery pack 2 side couples the magnetic field, and after rectification and voltage regulation by the receiving module 23, it charges the battery.

[0032] Discharge (Battery Pack 2 supplies power externally) mode: When power from Battery Pack 2 is needed, the charge / discharge control module 25 inside Battery Pack 2 controls its selection switch 24 to connect coil 21 to its internal transmitting module 22 (at this time, Battery Pack 2 acts as the power source). Simultaneously, the charge / discharge control module 25 inside the charging compartment controls its selection switch 24 to connect coil 21 to its internal receiving module 23. The power from Battery Pack 2 is wirelessly transmitted through its transmitting module 22 and coil 21 to the receiving coil 21 and receiving module 23 in the charging compartment, and finally output to the power supply terminal of the wired charger module 5.

[0033] Its beneficial effects are as follows: by using a simple selection switch 24 circuit, the same set of coils 21 and basic circuits are reused, realizing low-cost and high-reliability switching between wireless charging and wireless discharging modes, avoiding the increased cost and space occupation caused by setting up a complete transceiver link for each direction separately.

[0034] In one embodiment of the present invention, the wired charger module 5 includes: a wired charging control module 51, a communication module 52, a DC-DC conversion circuit 53, a control switch 54, a switching switch 55, and a charging plug 56. The two input terminals of the switching switch 55 are respectively connected to the DC power supply 4 of the battery swapping cabinet and the output terminal of the wireless charging and discharging module 1 in the charging compartment. The wired charging control module 51 is connected to the control terminal of the switching switch 55. The output terminal of the switching switch 55 is connected to one end of the control switch 54. The other end of the control switch 54 is connected to the power transmission line of the charging plug 56. The control terminal of the control switch 54 is connected to the wired charging control module 51. The communication module 52 is connected to the communication lines of the wired charging control module 51 and the charging plug 56. The charging plug 56 is connected to the charging port of the electric vehicle to be charged. The wired charging control module 51 controls the switching switch 55 to connect the output terminal of the DC power supply 4 of the battery swapping cabinet or the wireless charging and discharging module 1 in the charging compartment to the DC-DC conversion circuit 53 according to the preset control logic. The wired charging control module 51 communicates with the electric vehicle to be charged through the communication module 52, and the wired charging control module 51 adjusts the real-time charging power by controlling the DC-DC conversion circuit 53. The wired charging control module 51 controls the charging process by controlling the switch 54.

[0035] To achieve intelligent and safe wired charging, this embodiment provides a detailed design for the wired charger module 5. For example... Figure 3 As shown, the module includes a wired charging control module 51 (MCU), a communication module 52 (such as CAN / 485 / Bluetooth, which needs to meet the national standard communication protocol), a DC-DC conversion circuit 53, a control switch 54 (such as a MOSFET relay), a switching switch 55 (such as a double-pole double-throw relay), and a standard national standard charging plug 56 (such as a 2+4 interface).

[0036] Its workflow and connections are as follows: Power switching: One input terminal of the switching switch 55 is connected to the DC power supply 4 of the battery swapping cabinet (grid side), and the other is connected to the output terminal of the wireless charging and discharging module 1 (battery pack 2 side). Its output terminal is connected to the input terminal of the DC-DC conversion circuit 53. The wired charging control module 51 determines which power supply to use according to the control logic and controls the switching switch 55 to connect the corresponding path.

[0037] Power Regulation: The output of the DC-DC converter circuit 53 is connected to the power transmission line of the charging plug 56 via a control switch 54. The wired charging control module 51 communicates with the BMS (Battery Management System) of the electric vehicle to be charged via the communication module 52 and the communication line of the charging plug 56 to obtain the required target voltage, current, and other parameters. Then, the wired charging control module 51 precisely controls the DC-DC converter circuit 53 to convert the input DC power (voltage range, for example, 40-60V) into the DC power required by the electric vehicle (for example, 48V / 20A), achieving precise adaptation.

[0038] Charging start / stop: Control switch 54 is connected in series in the main circuit, and its control terminal is connected to wired charging control module 51. After completing parameter configuration and handshake, wired charging control module 51 closes control switch 54 to start charging; when charging is complete or a fault occurs, control switch 54 is immediately disconnected to cut off the output.

[0039] This module acts as a "smart charger," not only intelligently selecting the most economical energy source but also communicating directly with the vehicle to provide the most suitable and safest charging parameters. This completely eliminates the risk of users using inferior or incompatible chargers and incorporates the charging process into the system's monitoring.

[0040] In one embodiment of the present invention, the wired charger module 5 further includes a detection module, which is used to detect the voltage data and current data of the DC-DC conversion circuit 53, and the wired charging control module 51 is connected to the detection module; The wired charging control module 51 receives charging data from the electric vehicle to be charged in real time. When the charging data is abnormal, or when the voltage data and current data are abnormal, the wired charging control module 51 turns off the control switch 54 to stop charging.

[0041] To further enhance charging safety, this embodiment integrates a detection module into the wired charger module 5. This detection module can be a high-precision voltage and current sampling circuit, located at the output of the DC-DC converter circuit 53.

[0042] In practice, the detection module collects charging voltage and current values ​​in real time and feeds them back to the wired charging control module 51. Simultaneously, the wired charging control module 51 reads battery status data (such as cell voltage, temperature, and SOC) reported by the electric vehicle's BMS in real time via the communication module 52. The control module has multiple pre-set protection logics (such as overvoltage, undervoltage, overcurrent, short circuit, overheating, and abnormal battery voltage fluctuations). When any detected electrical parameter or received battery data exceeds a safety threshold, the control module immediately determines it to be in an abnormal state and, without waiting for user or cloud commands, directly drives the control switch 54 to disconnect, stopping charging within milliseconds.

[0043] This embodiment implements a local, hardware-level rapid fault response mechanism. Compared to traditional protection methods that rely solely on the cloud or post-event processing, it can "prevent problems before they occur" and significantly reduce the risk of charging accidents. This proactive and immediate protection is a significant improvement in the safety of this invention.

[0044] In one embodiment of the present invention, the wired charging control module 51 communicates with the battery swapping cabinet controller through the communication module 52, and the battery swapping cabinet controller communicates with the user cloud platform; When the electric vehicle to be charged does not have communication function, the user scans a QR code with his mobile phone to enter the user cloud platform. In the user cloud platform, the user selects that the electric vehicle does not have communication function and selects the battery type and battery specifications. The user cloud platform determines the charging power data according to the battery type and battery specifications. The battery swapping cabinet controller receives the charging power data and sends it to the wired charging control module 51 connected to the electric vehicle to be charged.

[0045] When the electric vehicle to be charged has communication capabilities, the user scans a QR code with their mobile phone to enter the user cloud platform. In the user cloud platform, the user selects the electric vehicle with communication capabilities, and the user cloud platform issues a communication command. The battery swapping cabinet controller sends the communication command to the wired charging control module 51 connected to the electric vehicle to be charged. The wired charging control module 51 communicates with the electric vehicle to be charged to obtain charging power data.

[0046] To ensure compatibility with both old and new national standards and electric vehicles with different communication capabilities, this embodiment provides two operating modes.

[0047] For electric vehicles with communication capabilities: After scanning the code, the user selects "Vehicle supports communication" in the mobile app / mini-program. Upon receiving this option, the user cloud platform sends a "communication mode" command to the designated wired charging control module 51 via the battery swapping cabinet controller. Subsequently, the wired charging control module 51 automatically negotiates with the vehicle's BMS through the communication line of the charging plug 56 to obtain the necessary charging parameters (such as voltage, current, charging mode, etc.) and performs charging accordingly. No manual parameter input from the user is required throughout the entire process.

[0048] For electric vehicles without communication capabilities: After scanning the code, the user selects "Vehicle does not support communication" on their mobile phone interface and manually enters or selects the vehicle's battery type, such as lead-acid or lithium battery, and the nominal specifications (e.g., 48V / 20Ah). The user cloud platform matches the safest charging parameters (such as maximum charging voltage, current limit, etc.) based on its built-in battery knowledge base or algorithm and sends these parameters to the wired charging control module 51. The wired charging control module 51 performs constant current / constant voltage charging according to these fixed parameters. During the charging process, although detailed battery status cannot be obtained, the voltage and current protection functions of the detection module remain effective.

[0049] It should be noted that the national standard interface is a 2+4 interface, which is not compatible with vehicles that use the old national standard, and therefore requires an adapter.

[0050] This dual-mode design allows "smart users" with vehicles meeting the new national standard to enjoy the convenience of plug-and-charge and optimal charging, while also enabling users of older vehicles to safely use the system. This greatly expands the service scope and user base of the equipment, providing a safe transition charging solution for vehicles meeting the old national standard.

[0051] In one embodiment of the present invention, the control logic includes: When it is during a peak power period and the number / proportion of fully charged battery packs in the charging cabinet is greater than or equal to a preset threshold, the wired charging control module 51 connects the output terminal of the wireless charging and discharging module 1 in the charging compartment to the DC-DC conversion circuit 53, and uses the power of the battery pack 2 in the cabinet to charge the electric vehicle to be charged. When it is during peak power hours and the number / proportion of fully charged battery packs in the charging cabinet is less than a preset threshold, the wired charging control module 51 connects the DC power supply 4 of the battery swapping cabinet to the DC-DC conversion circuit 53 and uses the power grid to charge the electric vehicle to be charged. During off-peak hours, the wired charging control module 51 connects the DC power supply 4 of the battery swapping cabinet to the DC-DC conversion circuit 53, using the power grid to charge the electric vehicle to be charged.

[0052] This system incorporates core intelligent control logic to determine the source of charging power. This logic is executed by the wired charging control module 51. The specific implementation steps are as follows: Time period determination: The control module first determines whether the current time belongs to the peak power period or the off-peak power period (the timetable can be dynamically distributed by the cloud platform).

[0053] During off-peak hours: grid electricity prices are low, making it the best time to recharge the batteries inside the cabinet. The control logic directly selects grid power to charge electric vehicles outside the cabinet, prioritizing the consumption of cheaper electricity while reserving fully charged batteries inside the cabinet for potential battery swapping needs.

[0054] During peak electricity hours: when grid electricity prices are high, priority should be given to using the "cheap" electricity already stored in the cabinet.

[0055] The control module reads the "number of fully charged battery packs" and "full charge percentage" data provided by the battery swapping cabinet controller and compares them with a preset threshold (e.g., the full charge percentage is greater than 60%).

[0056] If the threshold condition is met (e.g., there are many fully charged batteries), it means that the need for battery swapping may not be urgent. The control logic selects the power of battery pack 2 to charge the electric vehicle, thereby consuming the power stored during off-peak hours, earning the peak-valley electricity price difference, and maximizing operating profit.

[0057] If the threshold condition is not met (e.g., the fully charged battery is insufficient), it means that power needs to be reserved to cope with the upcoming battery swapping peak, and the control logic switches back to grid power to charge the electric vehicle.

[0058] This logic is the core of the "storage energy during off-peak hours, discharge energy during peak hours" business model. It ensures that the reliability of the battery swapping service (the main business) is not affected, while maximizing the use of peak-valley electricity pricing policies, creating economic value for users and operators, and indirectly contributing to the grid's "peak shaving and valley filling".

[0059] In one embodiment of the present invention, the user cloud platform can predict short-term battery swapping forecast data based on the historical battery swapping data of each battery swapping cabinet and the weather data of the location of the battery swapping cabinet. Based on the short-term battery swapping forecast data, a preset threshold is determined and the preset threshold is sent to the corresponding battery swapping cabinet controller, which then sends it to the wired charging control module 51.

[0060] To make the power dispatch strategy more intelligent and dynamic, this embodiment introduces an adaptive threshold adjustment mechanism based on cloud platform data analysis.

[0061] Specific implementation: The user cloud platform continuously collects historical data from each battery swapping station, including the number of swaps at different times, the remaining charge of swapped-out batteries, and user battery swapping habits. Simultaneously, the platform also accesses local weather data (such as temperature, humidity, and holiday status), as these factors significantly impact battery performance and travel demand. The platform utilizes time-series forecasting models (such as LSTM or ARIMA models) to make short-term predictions of battery swapping demand in the coming hours. Based on the predicted peak demand and the required battery reserves, the platform dynamically calculates a "fully charged battery pack 2 retention threshold." For example, if a large demand for battery swapping is predicted after one hour, the platform sets the threshold to 80%, requiring the retention of more fully charged batteries; conversely, if the predicted demand is moderate, the threshold can be lowered to 40% to encourage more use of battery storage for electric vehicle charging. The calculated threshold is sent in real-time to the corresponding battery swapping station controller and ultimately transmitted to the wired charging control module 51.

[0062] Compared to using fixed thresholds, this dynamic prediction mechanism gives the system "predictability" and "adaptability." It can better balance the two businesses of "commercial battery swapping" and "residential charging," maximizing energy efficiency and operational revenue while ensuring user experience.

[0063] In one embodiment of the present invention, a grid feedback device is provided in the battery swapping cabinet. The input end of the grid feedback device is connected to the output end of the wireless charging and discharging module 1 in the charging compartment. The input end of the grid feedback device is connected to the power grid. When the power grid needs to perform peak shaving and valley filling, the grid feedback device can feed back the electrical energy in the battery pack 2 to the power grid.

[0064] To support more advanced energy network interaction (V2G), this embodiment integrates a grid feedback device inside the battery swapping cabinet. This device is essentially a bidirectional DC-AC inverter. Its input is connected to the output of the wireless charging / discharging module 1 in the charging compartment (to obtain DC power from the reverse output of the battery pack 2), and its output is connected to the power grid (through isolation and protection circuitry).

[0065] When the grid operator issues a request, or when the cloud platform determines the optimal time for feedback based on electricity price signals (such as negative electricity prices), the battery swapping cabinet controller will initiate the grid feedback process. The control process is as follows: The controller checks the power and health status of battery pack 2 inside the cabinet and selects battery pack 2 with a higher SOC and better health.

[0066] The corresponding charging compartment is controlled to start the wireless discharge mode, and the power of the battery pack 2 is output as DC power to the grid feedback device through the wireless charging and discharging module 1.

[0067] The grid feedback device inverts the DC power into AC power with the same frequency, phase, and amplitude as the grid power, and feeds it into the grid.

[0068] The system records the amount of electricity supplied in reverse for subsequent settlement with the power grid company or user.

[0069] This transforms the battery swapping station from a simple "electricity consumer" into a "prosumer." It not only provides energy for electric vehicles but also feeds back the stored clean energy to the grid when needed, participating in electricity market transactions, creating new revenue streams for operators, and strongly supporting the consumption of renewable energy and the stable operation of the grid.

[0070] In another technical solution of the present invention, a battery swapping cabinet control method is provided for any of the wireless charging battery swapping cabinet systems described above, comprising: When it is during peak power hours and the number / proportion of fully charged battery packs in the charging cabinet is greater than or equal to a preset threshold, the power of battery pack 2 is used to charge the electric vehicle. When it is during peak power hours and the number / proportion of fully charged battery packs in the charging cabinet is less than a preset threshold, or when it is during off-peak power hours, the power grid is used to charge the electric vehicles waiting to be charged.

[0071] The method includes the following steps: S1: Real-time monitoring of the current power grid period (peak / valley) and the number of fully charged battery packs 2 in the battery swapping cabinet.

[0072] S2: If the current period is a low-voltage period, execute S5; if the current period is a high-voltage period, execute S3.

[0073] S3: Determine whether the number of fully charged battery packs is greater than or equal to a preset threshold.

[0074] S4: If the conditions are met, control the switching switch 55 to use the power of battery pack 2 to charge the electric vehicle to be charged.

[0075] S5: If the conditions are not met or it is currently a low-electricity period, control the switching switch 55 to use the power grid to charge the electric vehicle to be charged.

[0076] This method is logically clear and reliable, and is the foundational step for realizing the core intelligent scheduling function of this invention. It can automatically and efficiently balance the relationship between grid electricity prices, battery energy storage and user demand, and is easy to implement on embedded controllers.

[0077] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A wireless charging battery swapping cabinet system, characterized in that, include: Wireless charging and discharging module (1), battery pack (2), battery swapping cabinet main body (3), battery swapping cabinet DC power supply (4), wired charger module (5). The main body (3) of the battery swapping cabinet is provided with multiple charging compartments, which are used to place battery packs (2). Each charging compartment and battery pack (2) is provided with a wireless charging and discharging module (1). The DC power supply (4) of the battery swapping cabinet is connected to the power grid. The input and output terminals of the wireless charging and discharging module (1) in the battery pack (2) are both connected to the battery cell. The input terminal of the wireless charging and discharging module (1) in the charging compartment is connected to the DC power supply (4) of the battery swapping cabinet, and the output terminal is connected to the power supply terminal of the wired charger module (5). The power supply terminal of the wired charger module (5) is also connected to the DC power supply (4) of the battery swapping cabinet. The wireless charging and discharging module (1) is used to transmit the electrical energy of the DC power supply (4) of the battery swapping cabinet to the battery pack (2) or to transmit the electrical energy in the battery pack (2) to the wired charger module (5). The wired charger module (5) can select to use the power grid or the power of the battery pack (2) to charge the electric vehicle according to the preset control logic.

2. The wireless charging and battery swapping cabinet system as described in claim 1, characterized in that, The wireless charging and discharging module (1) includes a coil (21), a transmitting module (22), a receiving module (23), a selection switch (24), and a charging and discharging control module (25). The charging and discharging control module (25) is used to control the selection switch (24) to switch the coil (21) to be connected to the transmitting module (22) when power is supplied; and to control the selection switch (24) to switch the coil (21) to be connected to the receiving module (23) when power is taken. The input end of the transmitting module (22) and the output end of the receiving module (23) in the battery pack (2) are both connected to the battery cell; The input end of the transmitter module (22) in the charging compartment is connected to the DC power supply (4) of the battery swapping cabinet, and the output end of the receiver module (23) is connected to the power supply end of the wired charger module (5).

3. The wireless charging and battery swapping cabinet system as described in claim 1, characterized in that, The wired charger module (5) includes: a wired charging control module (51), a communication module (52), a DC-DC conversion circuit (53), a control switch (54), a switching switch (55), and a charging plug (56). The two input terminals of the switching switch (55) are respectively connected to the DC power supply (4) of the battery swapping cabinet and the output terminal of the wireless charging and discharging module (1) in the charging compartment. The wired charging control module (51) is connected to the control terminal of the switching switch (55). The output terminal of the switching switch (55) is connected to one end of the control switch (54). The other end of the control switch (54) is connected to the power transmission line of the charging plug (56). The control terminal of the control switch (54) is connected to the wired charging control module (51). The communication module (52) is connected to the communication lines of the wired charging control module (51) and the charging plug (56). The charging plug (56) is connected to the charging port of the electric vehicle to be charged. The wired charging control module (51) controls the switching switch (55) to connect the output of the DC power supply (4) of the battery swapping cabinet or the wireless charging and discharging module (1) in the charging compartment to the DC-DC conversion circuit (53) according to the preset control logic. The wired charging control module (51) communicates with the electric vehicle to be charged through the communication module (52), and the wired charging control module (51) adjusts the real-time charging power by controlling the DC-DC conversion circuit (53). The wired charging control module (51) controls the charging process by controlling the switch (54).

4. The wireless charging and battery swapping cabinet system as described in claim 3, characterized in that, The wired charger module (5) also includes a detection module, which is used to detect the voltage and current data of the DC-DC conversion circuit (53). The wired charging control module (51) is connected to the detection module. The wired charging control module (51) receives charging data from the electric vehicle to be charged in real time. When the charging data is abnormal, or when the voltage data and current data are abnormal, the wired charging control module (51) turns off the control switch (54) to stop charging.

5. The wireless charging and battery swapping cabinet system as described in claim 4, characterized in that, The wired charging control module (51) communicates with the battery swapping cabinet controller through the communication module (52), and the battery swapping cabinet controller communicates with the user cloud platform. When the electric vehicle to be charged does not have communication function, the user scans a QR code with his mobile phone to enter the user cloud platform. In the user cloud platform, the user selects that the electric vehicle does not have communication function and selects the battery type and battery specifications. The user cloud platform determines the charging power data according to the battery type and battery specifications. The battery swapping cabinet controller receives the charging power data and sends it to the wired charging control module (51) connected to the electric vehicle to be charged.

6. The wireless charging and battery swapping cabinet system as described in claim 5, characterized in that, When the electric vehicle to be charged has communication function, the user scans the QR code with his mobile phone to enter the user cloud platform. In the user cloud platform, the user selects the electric vehicle with communication function. The user cloud platform issues a communication command. The battery swapping cabinet controller sends the communication command to the wired charging control module (51) connected to the electric vehicle to be charged. The wired charging control module (51) communicates with the electric vehicle to be charged to obtain charging power data.

7. The wireless charging and battery swapping cabinet system as described in claim 1 or 3, characterized in that, The control logic includes: When it is during the peak power period and the number / proportion of fully charged battery packs in the charging cabinet is greater than or equal to the preset threshold, the wired charging control module (51) connects the output terminal of the wireless charging and discharging module (1) in the charging compartment to the DC-DC conversion circuit (53) and uses the power of the battery pack (2) in the cabinet to charge the electric vehicle to be charged. When it is during peak power hours and the number / proportion of fully charged battery packs in the charging cabinet is less than a preset threshold, the wired charging control module (51) connects the DC power supply (4) of the battery swapping cabinet to the DC-DC conversion circuit (53) and uses the power grid to charge the electric vehicle to be charged. When it is during off-peak hours, the wired charging control module (51) connects the DC power supply (4) of the battery swapping cabinet to the DC-DC conversion circuit (53) and uses the power grid to charge the electric vehicle to be charged.

8. The wireless charging and battery swapping cabinet system as described in claim 7, characterized in that, The user cloud platform can predict short-term battery swapping data based on the historical battery swapping data of each battery swapping cabinet and the weather data of the location of the battery swapping cabinet. Based on the short-term battery swapping prediction data, it determines a preset threshold and sends the preset threshold to the corresponding battery swapping cabinet controller, which then sends it to the wired charging control module (51).

9. The wireless charging and battery swapping cabinet system as described in claim 1, characterized in that, The battery swapping cabinet is equipped with a power grid feedback device. The input end of the power grid feedback device is connected to the output end of the wireless charging and discharging module (1) in the charging compartment. The input end of the power grid feedback device is connected to the power grid. When the power grid needs to shave peaks and fill valleys, the power grid feedback device can feed back the electrical energy in the battery pack (2) to the power grid.

10. A control method for a wireless charging battery swapping cabinet system, characterized in that, The wireless charging battery swapping cabinet system according to any one of claims 1-9 includes: When it is during the peak power period and the number / proportion of fully charged battery packs in the charging cabinet is greater than or equal to the preset threshold, the power of battery pack (2) is used to charge the electric vehicle. When it is during peak power hours and the number / proportion of fully charged battery packs in the charging cabinet is less than a preset threshold, or when it is during off-peak power hours, the power grid is used to charge the electric vehicles waiting to be charged.

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