Bidirectional charging and discharging module and electric wheelchair or scooter

Abstract

The utility model discloses a bidirectional charging and discharging module and an electric wheelchair or scooter, in the bidirectional charging and discharging module, a voltage and current acquisition unit is respectively connected with a power taking end interface and a power utilization end interface, and the voltage and current acquisition unit is also connected with a control module; the voltage and current acquisition unit is suitable for acquiring the output voltage and current of the power taking end interface and the input voltage and current of the power utilization end interface and feeding back to the control module; the power conversion module is respectively connected with the power utilization end interface and the power taking end interface, the power conversion module is also connected with the control module, and the control module is connected with the power conversion module; and the control module is suitable for controlling the action of the power conversion module according to the received input voltage and current as well as the output voltage and current so as to carry out conversion of corresponding power conversion levels and power flow directions, so that electric energy flows to the power utilization end interface from the power taking end interface. Power flow can flow bidirectionally, so that charging and power supply can be realized, and the power supply is particularly suitable for electric wheelchairs or scooters.

Description

Technical Field

[0001] This utility model relates to a bidirectional charging and discharging module and an electric wheelchair or mobility scooter, belonging to the field of charging and discharging technology. Background Technology

[0002] Currently, the power conversion units used in electric wheelchairs and mobility scooters, especially the charging units, have low conversion efficiency, low power density, and are bulky for the same power level, making them inconvenient to store and transport, and difficult for users to carry. Their functions are also relatively limited, only able to charge electric wheelchairs or mobility scooters, making it difficult to meet the increasingly diverse electricity needs of daily life. For example, Chinese patent CN108066072A discloses a wheelchair with a charging function. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a bidirectional charging and discharging module, whose power flow can flow in both directions, that is, it can charge and supply power, and is particularly suitable for electric wheelchairs or mobility scooters.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a bidirectional charging and discharging module, including a XLR interface, a USB interface, a photovoltaic panel, a power input / output interface, and a module group, wherein the module group includes a data acquisition unit, a power conversion module, and a control module; wherein...

[0005] One or two of the XLR interface, the USB interface, and the photovoltaic panel and power input / output interface are used as power-taking interfaces, and the remaining XLR interface, USB interface, and photovoltaic panel and power input / output interface are used as power-consuming interfaces.

[0006] The acquisition unit includes a voltage and current acquisition unit, which is connected to a power-taking interface and a power-consuming interface, respectively. The voltage and current acquisition unit is also connected to a control module. The voltage and current acquisition unit is adapted to acquire the output voltage and current of the power-taking interface and the input voltage and current of the power-consuming interface and feed them back to the control module.

[0007] The power conversion module is connected to the power consumption interface and the power intake interface respectively. The power conversion module is also connected to the control module, and the control module is connected to the power conversion module.

[0008] The control module is adapted to control the operation of the power conversion module according to the received input voltage and current and output voltage and current to perform corresponding power conversion level and power flow direction conversion, so that electrical energy flows from the power intake interface to the power consumption interface.

[0009] Furthermore, the acquisition unit also includes a USB fast charging protocol acquisition unit connected to the USB interface and the control module respectively. The USB fast charging protocol acquisition unit is adapted to acquire the fast charging protocol signal of the device connected to the USB interface and feed it back to the control module. When the power-consuming interface or the power-receiving interface contains the USB interface, the control module further adjusts the operation of the power conversion module according to the received fast charging protocol signal to adjust the corresponding power conversion level and power flow direction conversion.

[0010] Furthermore, the control module integrates an MPPT circuit. When the power input interface contains the photovoltaic panel and the power input / output interface, the MPPT circuit is connected to the photovoltaic panel and the power input / output interface to track the maximum power point of the device connected to the photovoltaic panel and the power input / output interface. The control module further controls the operation of the power conversion module according to the signal tracked by the MPPT circuit to adjust the corresponding power conversion level.

[0011] Furthermore, the voltage and current acquisition unit includes a XLR input / output voltage and current acquisition unit, a USB input / output voltage and current acquisition unit, and a DC input / output voltage and current acquisition unit; wherein,

[0012] The input and output voltage and current acquisition unit of the XLR interface is connected to the XLR interface to acquire the input voltage and current or the output voltage and current of the XLR interface;

[0013] The USB input / output voltage and current acquisition unit is connected to the USB interface to acquire the input voltage and current or output voltage and current of the USB interface.

[0014] The DC input / output voltage and current acquisition unit is connected to the photovoltaic panel and the power input / output interface to acquire the input voltage and current or the output voltage and current of the photovoltaic panel and the power input / output interface.

[0015] The power conversion module includes a PD bidirectional power conversion unit and a bidirectional DC power conversion unit.

[0016] Furthermore, the control module includes a DSP or an MCU.

[0017] Furthermore, the module group also includes a DC-DC conversion module and a functional module. The input terminal of the DC-DC conversion module is electrically connected to the power supply interface, and the output terminal of the DC-DC conversion module is electrically connected to the functional module and the control module, respectively. The DC-DC conversion module is adapted to convert the electrical energy input from the power supply interface and supply power to the control module and the functional module.

[0018] Furthermore, the functional modules include an LED array driver module, an IoT module, an attitude sensor module, a satellite positioning module, and a voice interaction module.

[0019] Furthermore, the bidirectional charging and discharging module also includes a user interaction module, which is connected to the control module.

[0020] Furthermore, the user interaction module includes a key input unit and a display unit.

[0021] Furthermore, the control module is connected to the LED array driver module, and the control module is adapted to control the LED array driver module to drive the LED array for display;

[0022] The control module is connected to the IoT module, and the control module is adapted to interact with external data through the IoT module.

[0023] And / or the control module is connected to the attitude sensor module, the attitude sensor module is adapted to acquire the real-time attitude of the object under test, and the control module is adapted to control the action of the LED array drive module according to the received real-time attitude to drive the LED array to display the distress signal and / or send the distress signal outward through the IOT module.

[0024] And / or the control module is connected to the satellite positioning module, the satellite positioning module is adapted to collect the real-time location information of the object to be measured, and the control module is adapted to send the obtained real-time location information outward through the IoT module;

[0025] And / or the control module is connected to the voice interaction module, and the control module is adapted to perform voice interaction with the outside world through the voice interaction module.

[0026] Furthermore, the XLR interface is adapted to connect to an electric wheelchair or mobility scooter.

[0027] Furthermore, the control module is adapted to communicate with the control system of an electric wheelchair or mobility scooter via a XLR interface.

[0028] This utility model also provides an electric wheelchair or mobility scooter, including the aforementioned bidirectional charging and discharging module.

[0029] By adopting the above technical solution, this utility model has the following beneficial effects:

[0030] 1. The bidirectional charging and discharging module of this utility model can use a DSP or MCU as the main control device and a power conversion module for power conversion, which can greatly improve the conversion efficiency and maximize the power density, so as to minimize the size of the finished product at the same power level, making it easier to store, transport and carry by users.

[0031] 2. The bidirectional charging and discharging module of this utility model can be used to charge electric wheelchairs or mobility scooters, and can also draw power from electric wheelchairs or mobility scooters, and after conversion, provide power to a wide variety of electrical devices. While providing energy to electric wheelchairs and mobility scooters, it can also meet the increasingly diverse power needs of users in their daily lives.

[0032] 3. The bidirectional charging and discharging module of this utility model can operate in multiple power conversion modes, specifically the following operating modes:

[0033] Discharge Mode 1: Power is drawn from the XLR interface, converted by the power conversion module, and then sent to the USB interface to power the devices connected to the USB interface;

[0034] Discharge Mode 2: Power is drawn from the XLR interface, converted by the power conversion module, and then sent to the photovoltaic panel and power input / output interface; in this mode, the bidirectional charge / discharge module can be used as a digitally adjustable DC regulated power supply.

[0035] Discharge Mode 3: Power is drawn from the XLR interface, converted by the power conversion module, and simultaneously sent to the USB interface, photovoltaic panel, and power input / output interface;

[0036] Charging mode 1: Power is drawn from the USB port, converted by the power conversion module, and then sent to the XLR interface;

[0037] Charging Mode 2: Power is drawn from the photovoltaic panel and power input / output interface, converted by the power conversion module, and then sent to the XLR interface.

[0038] Charging Mode 3: Simultaneously draw power from the USB interface, photovoltaic panel, and power input / output interface, and after conversion by the power conversion module, send it to the XLR interface;

[0039] Car charging mode: Power is drawn from the 12V car charging port on the car through the photovoltaic panel and power input / output interface. After being converted by the power conversion module, it is sent to the XLR interface. This mode is very user-friendly for users who need to take electric wheelchairs or mobility scooters with them when they go out by car. Users can charge the electric wheelchairs or mobility scooters on the car through the 12V car charging port on the car while driving.

[0040] Independent digital power supply mode: Power is drawn from the USB interface, converted by the power conversion module, and then sent to the photovoltaic panel and power input / output interface 5. In this mode, the bidirectional charging and discharging module can be used independently as a digitally adjustable DC regulated power supply, separate from electric wheelchairs and mobility scooters for the elderly.

[0041] Independent MPPT Mode: Power is drawn from the photovoltaic panel and power input / output interface, converted by the power conversion module, and then sent to the USB interface to power the devices connected to the USB interface. In this mode, the bidirectional charging and discharging module can be used independently as a USB power supply with maximum power point tracking (MPPT) function, separate from electric wheelchairs and mobility scooters for the elderly.

[0042] Hybrid mode: When external devices are connected to the XLR interface, USB interface, photovoltaic panel and power input / output interface at the same time, the power conversion module will automatically determine the attributes of the devices connected to the corresponding interfaces to automatically determine the corresponding power level and power flow direction.

[0043] 4. The bidirectional charging and discharging module is equipped with a user interaction module, a satellite positioning module, a voice module, an IoT module, an attitude sensor, and an LED array, which facilitates providing users with diverse and intelligent interaction methods. Attached Figure Description

[0044] Figure 1 This is a perspective view of the bidirectional charging and discharging module of this utility model;

[0045] Figure 2 This is a schematic diagram of the bidirectional charging and discharging module of this utility model.

[0046] Figure 3 This is a schematic diagram of the module group of this utility model;

[0047] Figure 4 This is a schematic block diagram of the power conversion module of this utility model;

[0048] Figure 5 This is a schematic diagram of the topological structure of the bidirectional DC power conversion unit of this utility model;

[0049] Figure 6 This is a schematic diagram of the power flow direction of the bidirectional DC power conversion unit of this utility model. Figure 1 ;

[0050] Figure 7 This is a schematic diagram of the power flow direction of the bidirectional DC power conversion unit of this utility model. Figure 2 ;

[0051] Figure 8 This is a schematic diagram of the power flow direction of the bidirectional DC power conversion unit of this utility model. Figure 3 ;

[0052] Figure 9 This is a schematic diagram of the power flow direction of the bidirectional DC power conversion unit of this utility model. Figure 4 ;

[0053] Figure 10This is a schematic diagram of the power flow direction of the bidirectional DC power conversion unit of this utility model. Figure 5 ;

[0054] Figure 11 This is a power flow diagram of the bidirectional charging and discharging module of this utility model in discharge mode one.

[0055] Figure 12 This is a power flow diagram of the bidirectional charging and discharging module of this utility model in discharge mode two.

[0056] Figure 13 This is a power flow diagram of the bidirectional charging and discharging module of this utility model in discharge mode three.

[0057] Figure 14 This is a power flow diagram of the bidirectional charging and discharging module of this utility model in charging mode one.

[0058] Figure 15 This is a power flow diagram of the bidirectional charging and discharging module of this utility model in charging mode two.

[0059] Figure 16 This is a power flow diagram of the bidirectional charging and discharging module of this utility model in charging mode three.

[0060] Figure 17 This is a flowchart illustrating the identification interface attributes of the bidirectional charging and discharging module of this utility model.

[0061] Figure 18 This is a schematic diagram of the IoT data flow of the bidirectional charging and discharging module of this utility model;

[0062] Figure 19 This is a schematic diagram of the user interaction module of this utility model; wherein,

[0063] 1. XLR interface; 2. Module group; 201. DC-DC conversion module; 202. Control module; 203. Power conversion module; 2031. XLR input / output voltage and current acquisition unit; 2033. USB input / output voltage and current acquisition unit; 2032. DC input / output voltage and current acquisition unit; 2034. Bidirectional DC power conversion unit; 2035. PD bidirectional power conversion unit; 2036. USB fast charging protocol acquisition unit; 204. LED array driver module; 205. IoT module; 206. Attitude sensor module; 207. Satellite positioning module; 208. Voice interaction module; 3. User interaction module; 301. Button input unit; 302. Display unit; 4. USB interface; 5. Photovoltaic panel and power input / output interface; 6. LED array. Detailed Implementation

[0064] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0065] like Figure 1-19 As shown, a bidirectional charging and discharging module includes a XLR interface 1, a USB interface 4, a photovoltaic panel and power input / output interface 5, and a module group 2. Module group 2 includes a data acquisition unit, a power conversion module 203, and a control module 202; wherein,

[0066] One or two of the following can be used as power-taking interfaces: XLR interface 1, USB interface 4, and photovoltaic panel and power input / output interface 5; the remaining XLR interface 1, USB interface 4, and photovoltaic panel and power input / output interface 5 can be used as power-consuming interfaces.

[0067] The acquisition unit includes a voltage and current acquisition unit, which is connected to the power-taking interface and the power-consuming interface respectively. The voltage and current acquisition unit is also connected to the control module 202. The voltage and current acquisition unit is suitable for acquiring the output voltage and current of the power-taking interface and the input voltage and current of the power-consuming interface and feeding them back to the control module 202.

[0068] The power conversion module 203 is connected to the power consumption interface and the power intake interface respectively. The power conversion module 203 is also connected to the control module 202, and the control module 202 is connected to the power conversion module 203.

[0069] The control module 202 is adapted to control the operation of the power conversion module 203 according to the received input voltage and current and output voltage and current to perform corresponding power conversion level and power flow direction conversion, so that electrical energy flows from the power take-up interface to the power consumption interface.

[0070] Specifically, in this embodiment, the XLR interface 1 can be connected to an electric wheelchair or mobility scooter. Specifically, the control module 202 can communicate with the control system of the electric wheelchair or mobility scooter through the XLR interface 1 to monitor the operating status of the control system or to perform necessary configurations on the control system.

[0071] Specifically, in this embodiment, the USB interface 4 can be at least one or more combinations of Type-A and Type-C. The USB interface 4 is used to connect a user's USB charger to charge an electric wheelchair or mobility scooter; it can also connect a user's USB power device to provide power to the user's USB power device.

[0072] In this embodiment, the photovoltaic panel and power input / output interface 5 can be used to connect to the user's photovoltaic panel or the car charging interface on a car to charge the electric wheelchair or elderly mobility scooter; it can also be used to connect to the user's electrical equipment to provide power to the user's electrical equipment.

[0073] Specifically, such as Figures 11-16 As shown, the acquisition unit also includes a USB fast charging protocol acquisition unit 2036 connected to the USB interface 4 and the control module 202 respectively. The USB fast charging protocol acquisition unit 2036 is adapted to acquire the fast charging protocol signal of the device connected to the USB interface 4 and feed it back to the control module 202. When the power-consuming interface or the power-receiving interface contains the USB interface 4, the control module 202 further adjusts the operation of the power conversion module 203 according to the received fast charging protocol signal to adjust the corresponding power conversion level and power flow direction conversion. The USB fast charging protocol acquisition unit is prior art, and will not be described in detail in this embodiment. For reference, please refer to the fast charging protocol acquisition circuit in a multi-fast charging protocol dual-port charger disclosed in announcement number CN117895608A.

[0074] Specifically, the control module 202 integrates an MPPT circuit. When the power input interface contains a photovoltaic panel and a power input / output interface 5, the MPPT circuit is connected to the photovoltaic panel and the power input / output interface 5 to track the maximum power point of the device connected to the photovoltaic panel and the power input / output interface 5. The control module 202 further controls the operation of the power conversion module 203 according to the signal tracked by the MPPT circuit to adjust the corresponding power conversion level.

[0075] Specifically, such as Figures 11-16 As shown, the voltage and current acquisition unit includes an XLR input / output voltage and current acquisition unit 2031, a USB input / output voltage and current acquisition unit 2033, and a DC input / output voltage and current acquisition unit 2032. In this embodiment, the XLR input / output voltage and current acquisition unit 2031, the USB input / output voltage and current acquisition unit 2033, and the DC input / output voltage and current acquisition unit 2032 are all voltage and current acquisition circuits, which are existing technologies and will not be described in detail in this embodiment.

[0076] The input and output voltage and current acquisition unit 2031 of the XLR interface is connected to the XLR interface 1 to acquire the input voltage and current or the output voltage and current of the XLR interface 1.

[0077] The USB input / output voltage and current acquisition unit 2033 is connected to the USB interface 4 to acquire the input voltage and current or output voltage and current of the USB interface.

[0078] The DC input / output voltage and current acquisition unit is connected to the photovoltaic panel and the power input / output interface 5 to acquire the input voltage and current or the output voltage and current of the photovoltaic panel and the power input / output interface 5.

[0079] Specifically, such as Figure 4 As shown, the power conversion module 203 includes a PD bidirectional power conversion unit 2035 and a bidirectional DC power conversion unit 2034.

[0080] Specifically, such as Figure 5 As shown, both the bidirectional DC power conversion unit 2034 and the PD bidirectional power conversion unit 2035 adopt the following... Figure 5 The bidirectional DC-DC converter topology shown has the same working principle. The working principle of the bidirectional DC-DC power conversion unit 2034 is explained in detail below. The bidirectional DC-DC power conversion unit 2034 includes MOSFETs TR1, TR2, TR3, and TR4, inductor L1, and energy storage and filtering capacitors C1 and C2. The drain (D) of MOSFET TR1 is connected to terminal V1, and the source (S) of MOSFET TR1 is connected to the drain (D) of MOSFET TR2 and one end of inductor L1. The source (S) of MOSFET TR2 is connected to common ground. The drain (D) of MOSFET TR3... The source (S) of MOSFET TR3 is connected to the drain (D) of MOSFET TR4 and the other end of inductor L1; the source (S) of MOSFET TR4 is connected to the common ground; the positive terminal of energy storage filter capacitor C1 is connected to terminal V1, and the negative terminal of energy storage filter capacitor C1 is connected to the common ground; the positive terminal of energy storage filter capacitor C2 is connected to terminal V2, and the negative terminal of energy storage filter capacitor C2 is connected to the common ground; the gate (G) terminals of MOSFETs TR1, TR2, TR3, and TR4 are respectively connected to the PWM control signal;

[0081] When it is necessary to control the flow of electrical energy from terminal V1 to terminal V2, there may be three possible situations when comparing the voltage at terminal V1 with the desired output voltage at terminal V2: the voltage at terminal V1 is less than the desired output voltage at terminal V2, the voltage at terminal V1 is equal to the desired output voltage at terminal V2, and the voltage at terminal V1 is greater than the desired output voltage at terminal V2.

[0082] The specific conversion process for the above three scenarios will be explained in detail below:

[0083] When the voltage at terminal V1 is less than the desired output voltage at terminal V2, such as Figure 6As shown, during time period t1, control module 202 sends a high level to the gate (G) terminals of MOSFETs TR1 and TR4 to turn them on, and sends a low level to the gate (G) terminals of MOSFETs TR2 and TR3 to turn them off. This allows electrical energy to flow through MOSFETs TR1, inductor L1, and TR4 back to the common ground. At this time, the electrical energy is converted into magnetic energy and stored in inductor L1. During time period t1, the energy storage filter capacitor C2 supplies power to the load at terminal V2. Electrical energy flows from the positive terminal of energy storage filter capacitor C2 through the load back to the negative terminal of energy storage filter capacitor C2. Figure 7 As shown, during time period t2, control module 202 controls MOSFETs TR2 and TR3 to conduct by giving them a high gate (G) level, and controls MOSFETs TR1 and TR4 to turn off by giving them a low gate (G) level. At this time, the electrical energy stored in inductor L1 during time period t1 will flow from one end of inductor L1 through MOSFET TR3 to the V2 end. Then, part of the electrical energy charges the energy storage filter capacitor C2, and the other part of the electrical energy flows to the common ground through the load and back to the other end of inductor L1 through MOSFET TR2. By repeating the control timing sequence of time periods t1 and t2, the flow of electrical energy from the V1 end to the V2 end can be continuously controlled. By adjusting the ratio of time periods t1 and t2, the amount of electrical energy flowing from the V1 end to the V2 end can be controlled.

[0084] When the voltage at terminal V1 is equal to the desired output voltage at terminal V2, such as Figure 8 As shown, the control module 202 controls MOSFETs TR1 and TR3 to conduct by giving them a high level at their gate (G) and controls MOSFETs TR2 and TR4 to turn them off by giving them a low level at their gate (G), so that electrical energy flows through MOSFETs TR1, inductor L1 and MOSFETs TR3 to the V2 terminal, and then through the load to the common ground.

[0085] When the voltage at terminal V1 is greater than the desired output voltage at terminal V2, such as Figure 9As shown, during time period t1, control module 202 sends a high-level signal to the gates (G) of MOSFETs TR1 and TR3 to turn them on, and sends a low-level signal to the gates (G) of MOSFETs TR2 and TR4 to turn them off. This allows electrical energy to flow through MOSFETs TR1, inductor L1, and MOSFET TR3 to terminal V2. Due to the resistance of inductor L1 to the current, the current flowing to terminal V2 increases slowly. If the current flowing to terminal V2 is insufficient to meet the load demand, the missing electrical energy is provided by the energy storage filter capacitor C2. During time period t1, inductor L1 converts the electrical energy flowing into terminal V1 into magnetic energy for storage; as... Figure 10 As shown, during time period t2, control module 202 controls MOSFETs TR2 and TR3 to conduct by giving them a high gate (G) level, and controls MOSFETs TR1 and TR4 to turn off by giving them a low gate (G) level. At this time, the electrical energy stored in inductor L1 during time period t1 will flow from one end of inductor L1 through MOSFET TR3 to the V2 end. Then, part of the electrical energy charges the energy storage filter capacitor C2, and the other part of the electrical energy flows to the common ground through the load and back to the other end of inductor L1 through MOSFET TR2. By repeating the control timing sequence of time periods t1 and t2, the flow of electrical energy from the V1 end to the V2 end can be continuously controlled. By adjusting the ratio of time periods t1 and t2, the amount of electrical energy flowing from the V1 end to the V2 end can be controlled.

[0086] Similarly, if it is necessary to control the flow of electrical energy from V2 to V1, the control module 202 only needs to control the conduction or cutoff of MOSFETs TR1, TR2, TR3, and TR4 according to the reverse control timing sequence. This will control the flow of electrical energy from V2 to V1. The control module 202 controls the conduction or cutoff time ratio (duty cycle) of MOSFETs TR1, TR2, TR3, and TR4 to control the amount of electrical power flowing from V2 to V1. The specific principle is the same as that for controlling the flow of electrical energy from V1 to V2, and will not be described again here.

[0087] Specifically, the control module 202 includes a DSP or an MCU.

[0088] Specifically, such as Figure 3 As shown, module group 2 also includes a DC-DC conversion module 201 and a functional module. The input terminal of the DC-DC conversion module 201 is electrically connected to the power supply interface, and the output terminal of the DC-DC conversion module 201 is electrically connected to the functional module and the control module 202 respectively. The DC-DC conversion module 201 is adapted to convert the electrical energy input from the power supply interface and supply power to the control module 202 and the functional module.

[0089] Specifically, such as Figure 3 As shown, the functional modules include an LED array driver module 204, an IoT module 205, an attitude sensor module 206, a satellite positioning module 207, and a voice interaction module 208.

[0090] Specifically, such as Figure 19 As shown, the bidirectional charging and discharging module also includes a user interaction module 3, which is connected to the control module 202.

[0091] Specifically, such as Figure 19 As shown, the user interaction module 3 includes a button input unit 301 and a display unit 302; wherein, the button input unit 301 may be a light-touch button switch, a touch button, or a touch screen, etc.; the display unit 302 may be an LED indicator, an LED display array, or a display screen.

[0092] Specifically, such as Figure 3 As shown, the control module 202 is connected to the LED array driver module 204, and the control module 202 is adapted to control the LED array driver module 204 to drive the LED array 6 for display.

[0093] The control module 202 is connected to the IoT module 205, and the control module 202 is adapted to interact with the outside through the IoT module 205.

[0094] The control module 202 is connected to the attitude sensor module 206. The attitude sensor module 206 is adapted to acquire the real-time attitude of the object under test. The control module 202 is adapted to control the action of the LED array driver module 204 according to the received real-time attitude to drive the LED array 6 to display the distress signal and send the distress signal outward through the IOT module 205.

[0095] The control module 202 is connected to the satellite positioning module 207. The satellite positioning module 207 is adapted to collect the real-time location information of the object to be measured. The control module 202 is adapted to send the obtained real-time location information to the outside through the IoT module 205.

[0096] The control module 202 is connected to the voice interaction module 208, and the control module 202 is adapted to interact with the outside world via the voice interaction module 208.

[0097] In this embodiment, the LED array 6 can display the operating status of the electric wheelchair or mobility scooter control system, provide lighting for the user, and display emergency distress signals.

[0098] In this embodiment, as Figure 18As shown, the IoT module 205 can connect to a cloud server (remote mode) or a user APP (local mode). The IoT module 205 receives data information such as working status and setting parameters sent by the control module 202, and transmits it to the cloud server (remote mode) or directly to the user APP (local mode) via wireless communication technology. The IoT module 205 also receives data commands sent by the cloud server (remote mode) or the user APP (local mode) via wireless communication technology, and sends them to the control module 202 through the communication interface. This enables users to view or set the working status, working parameters, real-time location, or attitude of the bidirectional charging and discharging module remotely or locally via the APP. The attitude sensor module 206 can monitor the driving posture of the electric wheelchair or elderly mobility scooter. The satellite positioning module 207 can locate the real-time location or driving trajectory of the electric wheelchair or elderly mobility scooter. The voice interaction module 208 receives and responds to the user's voice commands.

[0099] In this embodiment, when the bidirectional charge / discharge module is operating in discharge mode one, such as Figure 11 As shown, when the XLR interface is connected to an electric wheelchair or mobility scooter, the electrical energy from the wheelchair or scooter is transmitted to the DC-DC converter module 201 via the XLR interface. The DC-DC converter module 201 converts the electrical energy into low-voltage and stable power to supply the connected modules. The control module 202 starts operating after receiving the power. After starting, the control module 202 acquires the voltage from the XLR interface 1 via the XLR input / output voltage and current acquisition unit 2031 and determines whether the voltage is within a reasonable range. If it is within the reasonable range, the control module 202 acquires the charging protocol supported by the device connected to the USB interface 4 via the USB fast charging protocol acquisition unit 2036. Then, the control module 202 controls the PD bidirectional power conversion unit 2035 to perform the corresponding level of power conversion, supplying power to the device via the USB interface 4.

[0100] When the bidirectional charge / discharge module is operating in discharge mode two, such as Figure 12As shown, when the XLR interface 1 is connected to an electric wheelchair or mobility scooter, the electrical energy from the wheelchair or scooter is transmitted to the DC-DC converter module 201 via the XLR interface 1. The DC-DC converter module 201 converts the electrical energy into low-voltage and stable power to supply the connected modules. The control module 202 starts operating after receiving the power. After starting, the control module 202 collects the voltage obtained from the XLR interface 1 through the XLR input / output voltage and current acquisition unit 2031 and determines whether the voltage is within a reasonable range. If it is within the reasonable range, the control module 202 controls the bidirectional DC power conversion unit 2034 to perform corresponding power conversion according to the user-set parameters, supplying power to external electrical equipment through the photovoltaic panel and power input / output interface 5.

[0101] When the bidirectional charge / discharge module is operating in discharge mode three, such as Figure 13 As shown, when the XLR interface 1 is connected to an electric wheelchair or mobility scooter, the electrical energy from the wheelchair or scooter is transmitted to the DC-DC converter module 201 via the XLR interface 1. The DC-DC converter module 201 converts the electrical energy into low-voltage and stable power to supply the connected modules. The control module 202 starts operating after receiving the power. After starting, the control module 202 acquires the voltage from the XLR interface 1 via the XLR input / output voltage and current acquisition unit 2031 and determines if the voltage is within a reasonable range. If it is, the control module 202 acquires the charging protocol supported by the device connected to the USB interface 4 via the USB fast charging protocol acquisition unit 2036. Then, the control module 202 controls the PD bidirectional power conversion unit 2035 to perform the corresponding level of power conversion, supplying power to the device via the USB interface 4. Simultaneously, the control module 202 controls the bidirectional DC power conversion unit 2034 to perform corresponding power conversion according to the user-set parameters, supplying power to the external device via the photovoltaic panel and power input / output interface 5.

[0102] When the bidirectional charging and discharging module is operating in charging mode one, such as Figure 14 As shown, the bidirectional charging and discharging module draws power from USB interface 4. The power transmitted from USB interface 4 is converted into low-voltage and stable power by DC-DC converter module 201 to supply power to the connected modules. Control module 202 starts working after receiving power. After starting working, control module 202 collects the power level that the power supply device connected to USB interface 4 can provide through USB fast charging protocol acquisition unit 2036. Then, control module 202 controls PD bidirectional power conversion unit 2035 to perform corresponding power conversion. The power converted by PD bidirectional power conversion unit 2035 is then charged through XLR interface 1 after passing through XLR input / output voltage and current acquisition unit 2031.

[0103] When the bidirectional charging and discharging module is operating in charging mode two, such as Figure 15 As shown, the bidirectional charging and discharging module draws power from the photovoltaic panel and the power input / output interface 5. The electrical energy transmitted from the photovoltaic panel and the power input / output interface 5 is converted into low-voltage and stable electrical energy by the DC-DC conversion module 201 and supplied to each connected module. The control module 202 starts working after receiving the electrical energy. After the control module 202 starts working, it collects the voltage connected to the photovoltaic panel and power input / output interface 5 through the DC input / output voltage and current acquisition unit 2032 and determines whether the voltage is within a reasonable range. If it is within a reasonable range, the control module 202 controls the bidirectional DC power conversion unit 2034 to perform power conversion. The control module 202 integrates an MPPT circuit. During the power conversion process of the bidirectional DC power conversion unit 2034, the control module 202 tracks and calculates in real time the maximum power point that the power supply equipment connected to the photovoltaic panel and power input / output interface 5 can provide, and adjusts and controls the power conversion level of the bidirectional DC power conversion unit 2034 to maximize the conversion power. The electrical energy converted by the bidirectional DC power conversion unit 2034 is then charged for electric wheelchairs or mobility scooters through the XLR interface 1 after passing through the XLR input / output voltage and current acquisition unit 2031.

[0104] When the bidirectional charging and discharging module is operating in charging mode three, such as Figure 16As shown, the bidirectional charging and discharging module simultaneously draws power from the USB interface 4 and the photovoltaic panel and power input / output interface 5. The power transmitted from the USB interface 4 and the photovoltaic panel and power input / output interface 5 is converted into low-voltage and stable power by the DC-DC conversion module 201 to supply power to the connected modules. The control module 202 starts working after receiving power. After starting working, the control module 202 collects the voltage connected to the photovoltaic panel and power input / output interface 5 through the DC input / output voltage and current acquisition unit 2032 and determines whether the voltage is within a reasonable range. If it is within a reasonable range, the control module 202 controls the bidirectional DC power conversion unit 2034 to perform power conversion. The control module 202 integrates an MPPT circuit. During the power conversion process of the bidirectional DC power conversion unit 2034, the control module 202 tracks and calculates in real time the maximum power point that the power supply equipment connected to the photovoltaic panel and power input / output interface 5 can provide, and adjusts and controls the power conversion level of the bidirectional DC power conversion unit 2034 to achieve the desired effect. To maximize the conversion power, the electrical energy converted by the bidirectional DC power conversion unit 2034 is then used to charge the electric wheelchair or mobility scooter through the XLR interface 1 after passing through the XLR input / output voltage and current acquisition unit 2031. Simultaneously, the control module 202 acquires the power level provided by the power supply device connected to the USB interface 4 through the USB fast charging protocol acquisition unit 2036, and then controls the PD bidirectional power conversion unit 2035 to perform the corresponding power conversion. The electrical energy converted by the PD bidirectional power conversion unit 2035 is then used to charge the electric wheelchair or mobility scooter through the XLR interface 1 after passing through the XLR input / output voltage and current acquisition unit 2031.

[0105] When the bidirectional charging and discharging module operates in car charging mode, this mode is very user-friendly for users who need to drive with an electric wheelchair or mobility scooter. Users can connect the car's 12V car charger port to the photovoltaic panel and power input / output interface 5 while driving. At this time, the bidirectional charging and discharging module draws power from the photovoltaic panel and power input / output interface 5. The power from the photovoltaic panel and power input / output interface 5 is converted into low-voltage and stable power by the DC-DC converter module 201 to supply the connected modules. The control module 202 starts working after receiving the power. After starting, the control module 202 collects the voltage connected to the photovoltaic panel and power input / output interface 5 through the DC input / output voltage and current acquisition unit 2032 and determines whether the voltage is within a reasonable range. If it is within the reasonable range, the control module 202 controls the bidirectional DC power conversion unit 2034 to perform power conversion. The power converted by the bidirectional DC power conversion unit 2034 is then passed through the XLR input / output voltage and current acquisition unit 2031 and used to charge the electric wheelchair or mobility scooter through the XLR interface 1.

[0106] When the bidirectional charging and discharging module operates in independent digital power mode, it can function independently of electric wheelchairs and mobility scooters, functioning as a digitally adjustable DC regulated power supply. The module draws power from USB interface 4, which is then converted into low-voltage, stable power by the DC-DC converter module 201 to supply power to connected modules. The control module 202 begins operation upon receiving power. After the control module 202 starts working, it collects the power level that the power supply device connected to the USB interface 4 can provide through the USB fast charging protocol acquisition unit 2036. Then, the control module 202 controls the PD bidirectional power conversion unit 2035 to perform the corresponding power conversion. The electrical energy converted by the PD bidirectional power conversion unit 2035 is sent to the PD bidirectional power conversion unit 2035 through the XLR input / output voltage and current acquisition unit 2031. The control module 202 controls the bidirectional DC power conversion unit 2034 to perform the corresponding power conversion according to the parameters set by the user. After the bidirectional DC power conversion unit 2034 converts the electrical energy into the value that meets the user setting, it is sent to the photovoltaic panel and power input / output interface 5 to supply power to the external electrical equipment through the DC input / output voltage and current acquisition unit 2032.

[0107] When the bidirectional charging and discharging module operates in independent MPPT mode, it can function independently of electric wheelchairs and mobility scooters as a USB power supply with maximum power point tracking (MPPT) functionality. The module draws power from the photovoltaic panel and power input / output interface 5. The power from these interfaces is converted into low-voltage, stable power by the DC-DC converter module 201 and supplied to the connected modules. The control module 202 begins operation upon receiving power. After the control module 202 starts working, it collects the voltage connected to the photovoltaic panel and power input / output interface 5 through the DC input / output voltage and current acquisition unit 2032 and determines whether the voltage is within a reasonable range. If it is within a reasonable range, the control module 202 controls the bidirectional DC power conversion unit 2034 to perform power conversion. The control module 202 integrates an MPPT circuit. During the power conversion process of the bidirectional DC power conversion unit 2034, the control module 202 tracks and calculates in real time the maximum power point that the power supply equipment connected to the photovoltaic panel and power input / output interface 5 can provide, and adjusts and controls the power conversion level of the bidirectional DC power conversion unit 2034 to maximize the conversion power. Electrical energy is converted by the bidirectional DC power conversion unit 2034 and then sent to the XLR input / output voltage and current acquisition unit 2031. The control module 202 acquires the charging protocol supported by the device connected to the USB interface 4 through the USB fast charging protocol acquisition unit 2036. Then, the control module 202 controls the PD bidirectional power conversion unit 2035 to perform the corresponding level of power conversion according to the specific charging protocol. The power is then sent to the USB interface 4 through the USB input / output voltage and current acquisition unit 2033 to power the external USB device.

[0108] When the bidirectional charging / discharging module operates in hybrid mode, it draws power from any one or two of the three interfaces: XLR interface 1, USB interface 4, or photovoltaic panel and power input / output interface 5. The power is then converted by the power conversion module 203 and supplied to the other one or two interfaces. The DC-DC conversion module 201, after receiving power from any one or two of the three interfaces, converts the power into low-voltage and stable power to supply the connected modules. The control module 202 begins operation after receiving power. Figure 17As shown, after the control module 202 starts working, it acquires the voltage of the XLR interface 1 through the XLR input / output voltage and current acquisition unit 2031 and identifies the attributes of the XLR interface 1 according to the acquired voltage (the attributes are divided into: 1. Power input port, 2. Discharge port, 3. Not connected); the control module 202 acquires the voltage of the photovoltaic panel and the power input / output interface 5 through the DC input / output voltage and current acquisition unit 2032 and identifies the attributes of the photovoltaic panel and the power input / output interface 5 according to the acquired voltage (the attributes are divided into: 1. Power input port, 2. Discharge port, 3. Not connected); the control module 202 acquires the voltage of the US through the USB input / output voltage and current acquisition unit 2033. The voltage of USB interface 4 is measured and the attributes of USB interface 4 are identified based on the measured voltage (the attributes are divided into: 1. Power input port, 2. Discharge port, 3. Not connected). If the attribute of USB interface 4 is not 'Not connected', the control module 202 collects and identifies the charging protocol supported by the device connected to USB interface 4 through the USB fast charging protocol acquisition unit 2036. After the control module 202 identifies all interface attributes and charging protocols, it controls the bidirectional DC power conversion unit 2034 and the PD bidirectional power conversion unit 2035 to perform power conversion of the corresponding power level and power flow direction according to the user-set parameters, so that the power flows from the power input port to the discharge port.

[0109] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bidirectional charge and discharge module, characterized by, The module includes a card interface (1), a USB interface (4), a photovoltaic panel and a power input / output interface (5), and a module group (2), the module group (2) includes a collection unit, a power conversion module (203) and a control module (202); wherein, One or two of the card interface (1), the USB interface (4) and the photovoltaic panel and the power input / output interface (5) are used as the power taking interface, and the remaining one or two of the card interface (1), the USB interface (4) and the photovoltaic panel and the power input / output interface (5) are used as the power consuming interface; The collection unit includes a voltage and current collection unit, the voltage and current collection unit is connected with the power taking interface and the power consuming interface respectively, the voltage and current collection unit is also connected with the control module (202), and the voltage and current collection unit is adapted to collect the output voltage and current of the power taking interface and the input voltage and current of the power consuming interface and feed back to the control module (202); The power conversion module (203) is connected with the power taking interface and the power consuming interface respectively, the power conversion module (203) is also connected with the control module (202), and the control module (202) is connected with the power conversion module (203); The control module (202) is adapted to control the action of the power conversion module (203) according to the received input voltage and current and output voltage and current to perform corresponding power conversion level and power flow conversion, so that the electric energy flows from the power taking interface to the power consuming interface.

2. The bidirectional charge and discharge module according to claim 1, wherein, The collection unit further includes a USB fast charging protocol collection unit (2036) connected with the USB interface (4) and the control module (202) respectively, the USB fast charging protocol collection unit (2036) is adapted to collect the fast charging protocol signal of the device connected with the USB interface (4) and feed back to the control module (202), when the power taking interface or the power consuming interface contains the USB interface (4), the control module (202) is further adapted to adjust the action of the power conversion module (203) according to the received fast charging protocol signal to adjust the corresponding power conversion level and power flow conversion.

3. The bidirectional charge and discharge module according to claim 1, wherein, The control module (202) is integrated with an MPPT circuit, when the power taking interface contains the photovoltaic panel and the power input / output interface (5), the MPPT circuit is connected with the photovoltaic panel and the power input / output interface (5) to track the maximum power point of the device connected with the photovoltaic panel and the power input / output interface (5), and the control module (202) is further adapted to control the action of the power conversion module (203) according to the signal tracked by the MPPT circuit to adjust the corresponding power conversion level.

4. The bidirectional charge and discharge module according to claim 1, wherein, The voltage current acquisition unit includes a card interface input and output voltage current acquisition unit (2031), a USB input and output voltage current acquisition unit (2033), and a DC input and output voltage current acquisition unit (2032); wherein, The card interface input and output voltage current acquisition unit (2031) is connected with the card interface (1) to acquire the input voltage and current or the output voltage and current of the card interface (1); The USB input and output voltage current acquisition unit (2033) is connected with the USB interface (4) to acquire the input voltage and current or the output voltage and current of the USB interface (4); The DC input and output voltage current acquisition unit is connected with the photovoltaic panel and power input and output interface (5) to acquire the input voltage and current or the output voltage and current of the photovoltaic panel and power input and output interface (5).

5. The bidirectional charge and discharge module according to claim 1, wherein, The power conversion module (203) includes a PD bidirectional power conversion unit (2035) and a bidirectional DC power conversion unit (2034).

6. The bidirectional charge and discharge module according to claim 1, wherein, The module group (2) further includes a DCDC conversion module (201) and a function module, the input end of the DCDC conversion module (201) is electrically connected with the power taking end interface, the output end of the DCDC conversion module (201) is electrically connected with the function module and the control module (202) respectively, and the DCDC conversion module (201) is adapted to convert the electric energy input by the power taking end interface and supply power to the control module (202) and the function module.

7. The bidirectional charge and discharge module of claim 6, wherein, The function module includes an LED array driving module, an IOT module (205), a posture sensor module (206), a satellite positioning module (207), and a voice interaction module (208).

8. The bidirectional charge and discharge module according to claim 7, wherein, Further comprising a user interaction module (3) connected with the control module (202); The user interaction module (3) includes a key input unit (301) and a display unit (302).

9. The bidirectional charge and discharge module according to claim 7, wherein, The control module (202) is connected with the LED array driving module, and the control module (202) is adapted to control the LED array driving module to drive the LED array (6) to display; The control module (202) is connected with the IOT module (205), and the control module (202) is adapted to interact with the outside through the IOT module (205) and the outside. And / or the control module (202) is connected with the posture sensor module (206), the posture sensor module (206) is suitable for collecting the real-time posture of the object to be measured, and the control module (202) is suitable for controlling the action of the LED array driving module to drive the LED array (6) to display a help-seeking signal and / or send a help-seeking signal to the outside through the IOT module (205) according to the received real-time posture; And / or the control module (202) is connected with the satellite positioning module (207), the satellite positioning module (207) is suitable for collecting the real-time position information of the object to be measured, and the control module (202) is suitable for sending the obtained real-time position information to the outside through the IOT module (205); And / or the control module (202) is connected with the voice interaction module (208), and the control module (202) is suitable for carrying out voice interaction with the outside through the voice interaction module (208).

10. The bidirectional charge and discharge module according to claim 1, wherein the CAN interface (1) is suitable for being connected with an electric wheelchair or a scooter.

11. The bidirectional charge and discharge module according to claim 10, wherein the control module (202) is suitable for communicating with the control system of the electric wheelchair or the scooter through the CAN interface (1). A bidirectional charge and discharge module as claimed in any one of claims 1 to 11. ​ 12. An electrically powered wheelchair or scooter characterised in that, ​

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