Multi-protocol intelligent mobile power supply and air conditioner partner integrated control system thereof

Abstract

The invention relates to the technical field of electronics, in particular to a multi-protocol intelligent mobile power supply and an air conditioner partner integrated control system thereof, and the system comprises a main control chip which is used for recognizing a charging protocol supported by external equipment and generating a corresponding control signal; the dynamic power supply management module is electrically connected with the main control chip and is used for receiving a control signal sent by the main control chip, monitoring an input voltage in real time and dynamically adjusting a charging current based on the input voltage; the TYPE-C interface is electrically connected with the main control chip and is used for establishing physical connection with external equipment and transmitting a protocol identification signal; the TYPE-A interface is electrically connected with the main control chip and is used for outputting charging current; and the battery protection unit is electrically connected with the dynamic power supply management module and is used for closing output when the battery voltage is lower than a first threshold value and cutting off the battery when the battery voltage is lower than a second threshold value, and the first threshold value is larger than the second threshold value and supports various fast charging protocols.

Description

Technical Field

[0001] The present invention relates to the field of electronic technology, and in particular to a multi-protocol intelligent mobile power supply and an air-conditioning companion integrated control system thereof. Background Art

[0002] As an indispensable accessory for modern electronic devices, mobile power banks are constantly being updated and iterated with technological advancements. However, existing mobile power bank technology suffers from the following common issues: First, compatibility is insufficient, with most products supporting only a single fast-charging protocol (such as PD or QC), making them incompatible with the charging needs of devices from multiple brands. Second, power management is inefficient, with input voltage fluctuations easily leading to charger overloads and a lack of dynamic current regulation mechanisms, impacting device lifespan. Third, functionality is limited, with traditional mobile power banks providing only charging functionality and lacking smart home control (such as air conditioning remote controls) and voice interaction capabilities. Finally, safety protection is incomplete, with fixed thresholds for battery overcharge and over-discharge protection, making them incapable of adapting to complex usage scenarios.

[0003] While various mobile power products are currently available on the market, few address all of the aforementioned issues simultaneously. For example, some products increase protocol compatibility by increasing circuit complexity, but at the expense of energy conversion efficiency. Others attempt to integrate additional functionality, often resulting in reduced system stability or increased power consumption. Furthermore, most existing dynamic power management technologies rely on simple threshold control, lacking fine-grained adjustment, making them unable to effectively protect the charger and device while ensuring charging efficiency.

[0004] Therefore, there is an urgent need for a technical solution that can solve the above problems and provide a mobile power system with high compatibility, high efficiency, multi-functions, safety and reliability. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-protocol intelligent mobile power supply and its air conditioning companion integrated control system to solve the technical problems of existing mobile power supplies such as insufficient compatibility, inefficient power management, single function and imperfect safety protection.

[0006] The present invention discloses a multi-protocol intelligent mobile power supply, comprising:

[0007] The main control chip is used to identify the charging protocol supported by the external device and generate the corresponding control signal;

[0008] A dynamic power management module is electrically connected to the main control chip, and is used to receive a control signal sent by the main control chip, monitor the input voltage in real time, and dynamically adjust the charging current based on the input voltage;

[0009] TYPE-C interface, electrically connected to the main control chip, used to establish a physical connection with an external device and transmit a protocol identification signal;

[0010] TYPE-A interface, electrically connected to the main control chip, for outputting charging current; and

[0011] A battery protection unit is electrically connected to the dynamic power management module and is used to shut down the output when the battery voltage is lower than a first threshold and shut down the battery when the battery voltage is lower than a second threshold, wherein the first threshold is greater than the second threshold.

[0012] Preferably, the main control chip includes:

[0013] Protocol identification module, used to identify multiple fast charging protocols including PD protocol, QC protocol and AFC protocol;

[0014] a protocol parameter selection module, electrically connected to the protocol identification module, for selecting an optimal voltage and current combination based on the identification result; and

[0015] A protocol conversion module is electrically connected to the protocol parameter selection module and is used to convert the optimal voltage and current combination into a control signal and send it to the dynamic power management module.

[0016] Preferably, the dynamic power management module includes:

[0017] A voltage detection unit is used to collect input voltage values ​​through a voltage divider resistor network;

[0018] a current control unit, electrically connected to the voltage detection unit, and configured to calculate a maximum allowable charging current according to the input voltage value; and

[0019] The PWM control unit is electrically connected to the current control unit and is used to generate a PWM signal to control the charging current.

[0020] Preferably, the current control unit is used for:

[0021] When the input voltage value is higher than a preset threshold value, maintaining the charging current at a preset maximum value;

[0022] When the input voltage value is within the critical range, reducing the charging current according to a preset proportional factor; and

[0023] When the input voltage is lower than a safety threshold, the charging current is reduced to zero.

[0024] Preferably, the battery protection unit includes:

[0025] The first protection IC has its pin 1 connected to the positive terminal of the battery through a resistor;

[0026] a second protection IC, whose pin No. 1 is electrically connected to the pin No. 4 of the first protection IC; and

[0027] a MOSFET switch, having a gate electrically connected to pin 1 of the second protection IC, and a source and a drain connected in series in a negative electrode circuit of the battery;

[0028] The first threshold is 2.8V, and the second threshold is 2.4V.

[0029] The air conditioner companion integrated control system, applied to the multi-protocol smart mobile power supply, includes:

[0030] VB903 control chip, electrically connected to the main control chip, for receiving control instructions and converting them into infrared control signals;

[0031] an infrared receiving circuit, electrically connected to pin 16 of the VB903 control chip, for receiving signals from an air conditioner remote controller and learning air conditioner control codes;

[0032] an infrared transmitting circuit, electrically connected to pin 15 of the VB903 control chip, for transmitting an infrared control signal to the air conditioning equipment;

[0033] A voice input circuit electrically connected to pins 5 and 6 of the VB903 control chip for collecting user voice commands; and

[0034] The status indication circuit is electrically connected to the No. 1 and No. 2 pins of the VB903 control chip and is used to provide visual and auditory feedback on the operating status.

[0035] Preferably, the infrared receiving circuit includes:

[0036] An infrared receiver, whose output pin is connected to pin 16 of the VB903 control chip via an IR_RX signal line;

[0037] a pull-up resistor, one end of which is connected to the power pin of the infrared receiver and the other end of which is connected to the IRVDD power supply; and

[0038] The filter capacitor is connected in parallel to both ends of the pull-up resistor and is used to eliminate power supply noise.

[0039] Preferably, the infrared emission circuit includes:

[0040] Infrared emitting diode, the anode of which is connected to the VBAT power supply through a current limiting resistor;

[0041] a driving transistor, wherein the collector is connected to the cathode of the infrared emitting diode and the emitter is grounded; and

[0042] The base current limiting resistor has one end connected to the base of the driving transistor and the other end connected to pin 15 of the VB903 control chip through the IR_TX signal line.

[0043] Preferably, the voice input circuit includes:

[0044] A microphone, the positive electrode of which is connected to pin 5 of the VB903 control chip through a bias resistor, and the negative electrode is grounded; and

[0045] A coupling capacitor, one end of which is connected to the output end of the microphone, and the other end is connected to pin 6 of the VB903 control chip, for filtering out DC components.

[0046] Preferably, the status indication circuit includes:

[0047] An LED indicator light, whose anode is connected to pin 1 of the VB903 control chip via a first current-limiting resistor, and whose cathode is grounded;

[0048] Buzzer, connected to VBAT power supply; and

[0049] A driving transistor, the base of which is connected to the No. 2 pin of the VB903 control chip through a second current-limiting resistor, the collector of which is connected to the driving end of the buzzer, and the emitter of which is grounded;

[0050] The LED indicator light and the buzzer provide visual and auditory feedback according to a preset mode.

[0051] The present invention has the following beneficial effects:

[0052] 1. High compatibility: By supporting multiple fast charging protocols such as PD, QC, AFC, etc., it meets the charging needs of different brands of devices and improves user experience;

[0053] 2. Intelligent power management: Based on dynamic power management technology, it monitors the input voltage in real time and dynamically adjusts the charging current to avoid charger overload and extend the service life of the device;

[0054] 3. Function expansion: integrated air conditioning companion function, through infrared communication and voice control technology, to achieve the organic combination of mobile power and smart home control;

[0055] 4. Safe and reliable: A dual-stage battery protection mechanism is adopted, which triggers different protection measures at different voltage thresholds to fully ensure battery safety;

[0056] 5. Low power consumption design: standby current is as low as 3μA, shutdown current does not exceed 100μA, which greatly extends the standby time and improves energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a block diagram of the multi-protocol intelligent mobile power system of the present invention;

[0058] Figure 2This is a connection diagram of the multi-protocol intelligent mobile power main control chip of the present invention;

[0059] Figure 3 This is a structural diagram of the dynamic power management module of the present invention;

[0060] Figure 4 This is a schematic diagram of the battery protection unit circuit of the present invention;

[0061] Figure 5 This is a block diagram of the air-conditioning companion integrated control system of the present invention;

[0062] Figure 6 This is a connection diagram of the VB903 control chip of the present invention;

[0063] Figure 7 This is a schematic diagram of the infrared receiving circuit of the present invention;

[0064] Figure 8 This is a schematic diagram of the infrared emission circuit of the present invention;

[0065] Figure 9 This is a schematic diagram of the voice input circuit of the present invention;

[0066] Figure 10 This is a schematic diagram of the status indication circuit of the present invention;

[0067] Figure 11 The present invention is a three-dimensional multi-protocol intelligent mobile power supply Figure 1 ;

[0068] Figure 12 The present invention is a three-dimensional multi-protocol intelligent mobile power supply Figure 2 ;

[0069] Figure 13 This is an exploded view of the multi-protocol smart mobile power supply of the present invention. DETAILED DESCRIPTION

[0070] The following is combined with Figure 1-13 The specific implementation of the present invention is described in detail. This implementation utilizes a three-tier architecture: the hardware layer includes a main control chip, power management circuitry, interface circuitry, air conditioning companion module, and battery protection unit; the firmware layer includes a protocol recognition engine, dynamic power management algorithm, infrared codec engine, and voice processing module; and the application layer includes a user interface, state management, and mode switching logic. Information is transferred between these layers via standardized interfaces, ensuring system modularity and scalability.

[0071] Reference Figure 1The multi-protocol intelligent mobile power supply provided by this invention includes a main control chip, a dynamic power management module, a Type-C interface, a Type-A interface, and a battery protection unit. These modules work together to achieve multi-protocol compatibility, dynamic power management, and safety protection. The system's core information flows, including charging protocol identification and management, and status monitoring and feedback, ensure stable and reliable system operation.

[0072] like Figure 2 As shown, the main control chip uses an IP6525T chip, which is used to identify the charging protocol supported by the external device and generate corresponding control signals. Preferably, the main control chip includes a protocol identification module, a protocol parameter selection module and a protocol conversion module.

[0073] The protocol identification module detects the CC pin level and the D+ / D- pin level combination of the Type-C interface to identify various fast-charging protocols, including PD, QC, and AFC. In one embodiment of the present invention, this module can identify over ten mainstream fast-charging protocols, including PD 2.0 / 3.0, QC 2.0 / 3.0, AFC, and FCP, significantly improving device compatibility. The specific protocol identification process is as follows: After a device is connected, the main control chip first detects the CC pin level to determine whether it supports the PD protocol. It also detects the D+ / D- pin level combination to determine whether it supports protocols such as QC, AFC, and FCP. For PD devices, the main control chip sends a Source_Capabilities message listing supported voltage / current combinations, waits for the device to respond with a Request message to determine the final charging parameters, then sends an Accept confirmation and switches to the requested voltage / current output. For QC devices, the main control chip sends a detection signal using a specific level combination on the D+ / D- pins. Based on the returned signal, it confirms the device's supported QC version. It then adjusts the D+ / D- levels according to the QC protocol specification to set the output voltage.

[0074] The protocol parameter selection module is electrically connected to the protocol identification module, and is used to select the optimal voltage and current combination based on the identification results. When the connected device supports multiple protocols, the module will select the most suitable charging parameters based on preset priorities and efficiency considerations. For example, when the device supports both PD3.0 and QC3.0, the system will give priority to the PD3.0 protocol and select the most efficient combination from the available parameters, such as 9V / 2.3A (efficiency of about 90%). Preferably, the module adopts the following priority rules: PD3.0>PD2.0>QC3.0>QC2.0>AFC>FCP>standard USB charging. This priority design fully takes into account the popularity, compatibility and efficiency factors of the protocol, and can adapt to the charging needs of the vast majority of devices on the market.

[0075] The protocol conversion module is electrically connected to the protocol parameter selection module, and is used to convert the optimal voltage and current combination into a control signal and send it to the dynamic power management module. This module converts the abstract protocol parameters into specific hardware control signals to ensure that the charging process is strictly executed in accordance with the selected protocol. For example, when the 9V / 2.3A parameter is selected, the protocol conversion module will generate the corresponding PWM duty cycle control signal and output it to the dynamic power management module through pin 32 of the main control chip to achieve precise current control. In addition, this module is also responsible for protocol status maintenance to ensure that the timing requirements during the protocol communication process are met, and to prevent the device from being disconnected or entering a protection state due to protocol errors.

[0076] During protocol identification and conversion, the connection between the main control chip and the Type-C interface is particularly critical. The CC1 / CC2 pins (JC1's A5 / B5) connect directly to pins 36 / 37 of the main control chip, U1, for PD protocol communication. The D+ / D- pins (JC1's A6 / A7) connect to U1's data processing pins via a signal conditioning circuit for QC and other protocol identification and communication. The VBUS pins (JC1's A4 / B4) connect to the power input detection circuit and then to U1's voltage monitoring pin. This connection ensures reliable and stable protocol communication.

[0077] Reference Figure 3 The dynamic power management module is electrically connected to the main control chip and is used to receive control signals from the main control chip, monitor the input voltage in real time, and dynamically adjust the charging current based on the input voltage. This module includes a voltage detection unit, a current control unit, and a PWM control unit.

[0078] The voltage detection unit collects the input voltage value through a voltage-divider resistor network. Specifically, the unit uses two precision resistors R1 and R2 to form a voltage-divider network, which reduces the input voltage proportionally and inputs it to the ADC pin of the main control chip. Preferably, R1 is 100kΩ, R2 is 10kΩ, and the voltage-divider ratio is 11:1, so that the input voltage of 12V is converted into a detection voltage of about 1.09V, which is suitable for the input range of the ADC inside the chip. The voltage-divided signal is input to the ADC pin (No. 43) of the main control chip U1 through the voltage detection path, and the reference voltage is provided by the internal reference source to ensure measurement accuracy. In order to further improve the measurement accuracy, the voltage detection unit also adopts a digital filtering algorithm, which effectively eliminates the influence of transient interference on the measurement results by continuously sampling 10 times and taking the average value.

[0079] The current control unit is electrically connected to the voltage detection unit and is used to calculate the maximum allowable charging current based on the input voltage value. This unit implements the core algorithm of dynamic current adjustment, and its working logic is as follows:

[0080] When the input voltage is above a preset threshold, the charging current is maintained at a preset maximum value. For example, when the 12V input voltage is above 11.5V, the system maintains a maximum charging current of 1.7A. This threshold is selected based on the voltage regulation characteristics of most 12V adapters to ensure that the charger operates within a stable range.

[0081] When the input voltage is within the critical range, the charging current is reduced according to the preset proportional factor. At this time, the charging current I is linearly related to the voltage deviation, which can be expressed as:

[0082] I=I max ×(1-k×(V th -V in )),

[0083] Where: I is the adjusted charging current, in A; I max is the maximum allowable charging current, in A; k is the adjustment coefficient, in V -1 ; V th is the preset voltage threshold, in V; V in is the actual input voltage, in V.

[0084] In one embodiment, when the input voltage is between 11.3V and 11.5V, the system reduces the charging current at a rate of 0.85A / 0.1V. max is 1.7A, k is 8.5V -1 ,V th For example, when the input voltage drops to 11.4V, the charging current is adjusted to approximately 1.53A. This linear adjustment strategy enables smooth transitions and avoids system instability caused by sudden current changes.

[0085] When the input voltage falls below a safety threshold, the charging current is reduced to zero. In this embodiment, when the input voltage falls below 11.3V, the system quickly reduces the charging current to zero to protect the charger from overload. This safety threshold is set based on the minimum stable operating voltage of most 12V adapters, ensuring that the charger always operates within a safe range.

[0086] It's worth noting that the current control unit also implements a recovery mechanism: when the voltage returns to 11.7V, the system gradually restores the current to avoid voltage fluctuations caused by sudden current changes. Specifically, the current recovery uses a slope limiting strategy, gradually increasing the charging current at a rate not exceeding 0.5A / s until it reaches the maximum allowable value. This smooth transition strategy effectively prevents oscillations during charging.

[0087] The current control unit is implemented by connecting the PWM output pin (pin 32) of the main control chip U1 to the current control circuit. A current sampling resistor R3 (0.01Ω) is connected in series with the charging path. The sampling signal is amplified by operational amplifier U5 and fed back to the current sense pin (pin 44) of U1. This closed-loop control structure ensures accurate and stable current regulation.

[0088] The PWM control unit is electrically connected to the current control unit and is used to generate a PWM signal to control the charging current. The unit converts the calculated current value into a PWM wave with a corresponding duty cycle, and adjusts the charging current by changing the duty cycle. Preferably, the PWM frequency is set to 100kHz, the duty cycle range is 0-100%, and the resolution is 0.1% to ensure that the current regulation accuracy meets the requirements. The PWM signal is output through pin 32 of the main control chip to drive the power MOSFET to control the charging current. In order to improve the response speed of current control, the PWM control unit adopts a predictive control algorithm to adjust the PWM duty cycle in advance according to the voltage change trend, and control the response time of current adjustment to within 10ms, effectively responding to rapidly changing load conditions.

[0089] The entire dynamic power management process forms a closed-loop system of voltage monitoring, current calculation, and PWM control. The system completes a complete monitoring and adjustment cycle every 10ms, including ADC sampling, digital filtering, voltage calculation, threshold comparison, current calculation, and PWM duty cycle update. This high-frequency closed-loop control ensures rapid response to input voltage changes, effectively protecting the charger from damage due to overload.

[0090] The Type-C port is electrically connected to the main control chip, establishing a physical connection with external devices and transmitting protocol identification signals. This port implements PD protocol communication via the CC1 / CC2 pins (connected to pins 36 / 37 of the main control chip) and recognizes and communicates protocols such as QC via the D+ / D- pins. The port also integrates overvoltage protection and EMI filtering circuits to enhance connection reliability.

[0091] Specifically, the physical connections of the Type-C interface include: the VBUS pin is connected to the power system via a TVS diode and a fuse to provide overvoltage and overcurrent protection; the CC1 / CC2 pins are connected to the host control chip via 5.1kΩ pull-down resistors R24 / R25, indicating that the device functions as a sink; and the D+ / D- pins are connected to the host control chip via ESD protection diodes and signal filter capacitors C21 / C22 (22pF) to eliminate high-frequency interference. This connection design fully considers signal integrity and interference resistance, ensuring reliable protocol communication.

[0092] The TYPE-A interface is electrically connected to the main control chip and is used to output charging current. This interface is connected to the DMA1 / DPA1 pins (pins 38 / 39) of the main control chip and controls the output state through a switching circuit. The interface integrates overcurrent protection and short-circuit protection functions to ensure charging safety. Specifically, the D+ / D- pins are connected to the DMA1 / DPA1 pins of U1 through a protection circuit, and VBUS is connected to the battery management system through a power MOSFET switching circuit to achieve output control. When an overcurrent or short circuit is detected, the main control chip will immediately turn off the MOSFET switch, cut off the output current, and protect the safety of the device and battery. In addition, the TYPE-A interface also supports the latest USB Battery Charging 1.2 specification, which can indicate the charging capability of the device through a specific level combination of the D+ / D- pins, helping the connected device adjust its charging strategy.

[0093] like Figure 4 As shown, the battery protection unit is electrically connected to the dynamic power management module and is configured to shut down the output when the battery voltage falls below a first threshold and to shut down the battery when the battery voltage falls below a second threshold, where the first threshold is greater than the second threshold. This unit implements a dual-stage protection mechanism to fully ensure battery safety.

[0094] In a preferred embodiment of the present invention, the battery protection unit includes a first protection IC, a second protection IC, and a MOSFET switch. Pin 1 of the first protection IC is connected to the positive electrode of the battery via a resistor. Specifically, this pin is connected to the B+ terminal via a 100Ω resistor R10 for collecting the battery voltage. Pin 1 of the second protection IC is electrically connected to pin 4 of the first protection IC, forming a cascade structure to achieve signal transmission. The gate of the MOSFET switch is electrically connected to pin 1 of the second protection IC, and the source and drain are connected in series in the battery negative electrode circuit to control the battery on and off.

[0095] The protection IC utilizes a dedicated lithium-ion battery protection chip with a built-in comparator, reference source, and control logic, enabling precise monitoring of battery voltage and generating appropriate protection signals. A 0.1μF coupling capacitor, C6, connects the first and second protection ICs for signal transmission, ensuring stable transmission of the protection signal. The MOSFET switch utilizes an N-channel MOSFET with a low on-resistance (typically 20mΩ), effectively controlling battery current while minimizing conduction losses.

[0096] The battery protection unit has a first threshold of 2.8V and a second threshold of 2.4V. When the battery voltage falls below 2.8V, the system triggers the first level of protection, shutting down the output while maintaining basic system operation. When the voltage drops further below 2.4V, the second level of protection is triggered, completely disconnecting the battery to prevent damage caused by excessive discharge. This dual-level protection design ensures a superior user experience while maximizing battery life.

[0097] Notably, the battery protection unit also integrates overcharge protection. When the battery voltage exceeds 4.25V, the protection circuit cuts off the charging path to prevent safety hazards caused by overcharging. Furthermore, the system implements overcurrent protection, which can be configured to 2A / 3A / 5A according to application requirements, effectively preventing excessive current caused by short circuits or abnormal loads.

[0098] The key technologies of the battery protection unit lie in the precise setting of the protection threshold and the reliable execution of the protection action. The protection threshold is set by an internal reference and has a low temperature coefficient (typically 50ppm / °C), ensuring stability within the operating temperature range of -20°C to 60°C. The protection action is generated by the control logic, driving the MOSFET switch to achieve circuit on-off, with a response time of no more than 100μs, capable of effectively responding to emergencies. In addition, when the battery voltage returns to normal or a charger is connected, the protection state is automatically released, and the system resumes normal operation without user intervention.

[0099] Reference Figure 5 The present invention also provides an integrated control system for an air conditioner companion, applicable to the multi-protocol intelligent mobile power supply. This system includes a VB903 control chip, an infrared receiver circuit, an infrared transmitter circuit, a voice input circuit, and a status indicator circuit. The air conditioner control information flow includes: voice command input → microphone signal conversion → analog signal amplification → analog-to-digital conversion → voice recognition processing → command parsing → infrared code generation → infrared signal transmission, completing the complete process from user command to air conditioner control.

[0100] Refer to the attached Figure 11-13 The infrared transmitting circuit corresponds to the transmitting head 1, the infrared receiving circuit corresponds to the receiving head 2, and the voice input circuit corresponds to the microphone head 3.

[0101] like Figure 6 As shown, the VB903 control chip is electrically connected to the main control chip, receiving control commands and converting them into infrared control signals. This chip is the core control unit for the AC Companion function, responsible for voice command processing, infrared signal encoding and decoding, and status management. Multiple pins connect the chip to peripheral circuits, enabling complete air conditioning control functionality.

[0102] The connection between the VB903 chip and the main control unit U1 is as follows: the LEDCC / LEDCW signal lines are connected from U1's pins 18 / 19 to VB903's pins 1 / 2, which are used to control the LED indicator and buzzer; the control enable signal is connected from U1's pin 3 to VB903's ON (pin 3), which is used to control the VB903's operating status; the communication interface is connected via a bidirectional data line to achieve state synchronization. This connection method ensures the coordinated operation of the two chips. The main control chip can control the VB903's operating mode based on the system status, and the VB903 can also report its operating status and processing results to the main control chip through the communication interface.

[0103] The VB903 chip's power connections include: The IRVCC and IRVDD power lines are filtered by capacitors C15, C16, and C24 to provide a stable operating voltage; the power pins are connected to ground via filter capacitors to eliminate power supply noise. The chip also features an upgrade interface. Pin 2 of PAD connector J1 is connected to pin 4 (PA2) of the VB903. The upgrade enable signal is controlled by the main control chip U1, ensuring safe upgrades. This upgradeable design significantly improves system maintainability and scalability. Users can use the upgrade interface to update firmware, add new features, or support new air conditioner models.

[0104] The VB903 chip integrates functional modules such as voice processing, infrared codec, and status management. The voice processing module receives and processes voice signals from the microphone, extracts keywords, and identifies user intent. The infrared codec module generates and receives infrared control signals, supporting multiple infrared coding protocols. The status management module coordinates the operations of various functional modules and provides system status feedback via LEDs and a buzzer. This highly integrated design greatly simplifies peripheral circuitry, improving system reliability and space efficiency.

[0105] like Figure 7 As shown, the infrared receiving circuit is electrically connected to pin 16 of the VB903 control chip to receive signals from the air conditioner remote control and learn the air conditioner control code. The circuit includes an infrared receiver, a pull-up resistor, and a filter capacitor.

[0106] The infrared receiver's output pin is connected to pin 16 of the VB903 controller chip via the IR_RX signal line. This receiver utilizes a standard three-pin design and features built-in demodulation, directly outputting the demodulated digital signal. The receiver incorporates an integrated narrowband filter (center frequency 38kHz ± 1kHz) that effectively rejects non-38kHz signals, significantly improving signal reception's interference immunity. Furthermore, the receiver features an adaptive threshold control function that automatically adjusts the decision threshold to accommodate signal reception in varying ambient lighting conditions, ensuring reliable signal decoding.

[0107] One end of the pull-up resistor is connected to the infrared receiver's power pin, and the other end is connected to the IRVDD power supply. In this embodiment, a 330Ω resistor R20 is used as the pull-up resistor to provide a stable operating current for the receiver. This resistor value is selected based on the receiver's operating current requirement (approximately 1.5mA) and power supply voltage (3.3V), ensuring that the receiver operates within its normal operating voltage range.

[0108] A filter capacitor is connected in parallel across the pull-up resistor to eliminate power supply noise. Preferably, a 100nF capacitor, C25, is used as the filter capacitor to effectively suppress high-frequency interference and improve signal reception quality. This capacitor was selected based on noise spectrum analysis and has a good suppressive effect on noise in the 1kHz-10MHz range without affecting the normal operation of the receiver.

[0109] The infrared receiver circuit can recognize and learn remote control signals from over 95% of mainstream air conditioner brands on the market, significantly improving system compatibility. When users need to control a new model, they simply point the original remote at the receiver, and the system automatically learns and stores the control code, enabling one-click pairing. The learning process utilizes multiple sampling and comparison methods to ensure the accuracy of the learning results. Specifically, the system requires the user to press the same button three times in succession, collects and compares the signals three times, and only considers the learning successful when the three signals are highly consistent, effectively preventing false learning caused by environmental interference.

[0110] like Figure 8 As shown, the infrared emission circuit is electrically connected to pin 15 of the VB903 control chip to send infrared control signals to the air conditioner. The circuit includes an infrared emission diode, a driving transistor, and a base current limiting resistor.

[0111] The anode of the infrared emitting diode is connected to the VBAT power supply through a current-limiting resistor. Specifically, a 10Ω resistor R5 is used as a current-limiting resistor to ensure sufficient transmission power while preventing overcurrent damage to the diode. The selection of this resistor value takes into account the diode's forward voltage drop (approximately 1.2V), power supply voltage (3.7V-4.2V), and target drive current (approximately 100mA), ensuring that the diode operates at the optimal emission efficiency point. The emitting diode uses a high-efficiency infrared light-emitting diode with a wavelength of 940nm and a half-power angle of ±15° to ensure the directionality and effective distance of the signal transmission.

[0112] The collector of the driver transistor is connected to the cathode of the infrared emitting diode, and the emitter is grounded. In this embodiment, an NPN transistor Q3 is used as the driver element to provide sufficient drive current. The transistor is selected to have a high current gain (hFE > 100) and a low saturation voltage drop (VCE(sat) < 0.3V) to ensure sufficient collector current at low base currents while minimizing conduction losses.

[0113] One end of the base current-limiting resistor is connected to the base of the driver transistor, and the other end is connected to pin 15 of the VB903 control chip via the IR_TX signal line. Preferably, a 1kΩ resistor R25 is used as the base current-limiting resistor to control the base current within a safe range. This resistor value is selected based on the drive capability of the VB903 output pin (maximum 10mA) and the base current requirement of the transistor, ensuring reliable transistor conduction without damaging the VB903 chip.

[0114] The infrared transmitter circuit utilizes 38kHz carrier modulation technology, providing ample transmission power and an effective control range of up to 8 meters, meeting the requirements of most home spaces. Signal transmission utilizes the standard NEC protocol format, consisting of a pilot code, address code, command code, and check code to ensure accurate signal recognition. The pilot code, consisting of a 9ms high level followed by a 4.5ms low level, is used for receiver synchronization; the address code, consisting of 16 bits of binary data, identifies the device type; the command code, also 16 bits of binary data, indicates the specific operation; and the check code, the inverse of the command code, is used for error detection. Each bit is encoded as follows: a logic "0" consists of a 0.56ms high level followed by a 0.56ms low level, and a logic "1" consists of a 0.56ms high level followed by a 1.69ms low level. This encoding method provides strong interference resistance and ensures reliable signal transmission.

[0115] In addition to the NEC protocol, the system also supports mainstream infrared coding protocols such as RC5 and SONY to meet the control needs of different air conditioner brands. Protocol selection is automatically determined based on learning results, eliminating the need for manual user configuration. During transmission, the system automatically monitors the signal transmission status and checks for successful transmission after completion. If a transmission failure is detected, the system automatically retries up to three times, significantly improving the control success rate.

[0116] like Figure 9 As shown, the voice input circuit is electrically connected to pins 5 and 6 of the VB903 control chip to collect user voice commands. The circuit includes a microphone and a coupling capacitor.

[0117] The positive terminal of the microphone is connected to pin 5 of the VB903 control chip via a bias resistor, and the negative terminal is grounded. In this embodiment, a 2.2kΩ resistor R1 is used as the bias resistor to provide the microphone with an operating voltage of approximately 2.5V to optimize the signal-to-noise ratio. This bias voltage is selected based on the microphone's electrical characteristics to ensure that the microphone operates within its optimal response range. The microphone uses an omnidirectional condenser microphone with a sensitivity of -42dB ± 3dB (0dB = 1V / Pa, 1kHz) and a signal-to-noise ratio greater than 60dB, capable of effectively capturing voice signals from all directions.

[0118] One end of the coupling capacitor is connected to the microphone output terminal, and the other end is connected to pin 6 of the VB903 control chip to filter out DC components. Preferably, a 1μF capacitor C18 is used as the coupling capacitor, which effectively transmits voice signals while blocking DC bias voltage. This capacitor value is selected based on the frequency characteristics of the voice signal, ensuring that voice signals above 200Hz can be transmitted without attenuation while effectively blocking DC components.

[0119] The voice input circuit supports signal acquisition in the 200Hz-8kHz frequency range, covering the primary frequency range of human speech. The system utilizes voice processing technology based on keyword recognition, maintaining over 85% recognition accuracy in an 80dB ambient noise environment. The voice acquisition and pre-processing process is as follows: the microphone collects the sound signal in real time and converts it into an electrical signal. This signal undergoes pre-amplification and filtering to eliminate ambient noise, and then is converted to a digital signal using an ADC (16kHz / 16bit) sampling. Finally, a silence check is performed to confirm valid voice input.

[0120] The speech recognition process uses signal framing (25ms) and feature extraction (MFCC features) to detect keywords. The MFCC (Mel-Frequency Cepstral Coefficient) feature extraction process includes pre-emphasis, framing, windowing, FFT transformation, Mel filter bank processing, logarithm extraction, and discrete cosine transform. This effectively extracts key speech features and improves recognition accuracy. Keyword detection is based on a template matching algorithm, comparing the extracted features with a pre-stored template. A keyword is considered detected when the similarity exceeds a threshold.

[0121] Supported basic commands include "turn on the air conditioner", "turn off the air conditioner", "raise the temperature", "lower the temperature", etc. Advanced commands include "set the temperature to 26 degrees", "switch to cooling mode", etc., to meet daily use needs. In addition, the system also supports compound commands, such as "turn on the air conditioner and set it to 25 degrees", "turn on energy-saving mode and set the timer for 2 hours", etc., to further enhance the user experience. Command parsing is based on grammatical rule analysis, which can accurately extract the operation type and parameters in the command, and map them to a predefined command set. It then queries the infrared code corresponding to the command (different brands of air conditioners have different codes), generates the infrared emission timing, and finally triggers the status feedback mechanism to prompt the user.

[0122] like Figure 10 As shown, the status indication circuit is electrically connected to pins 1 and 2 of the VB903 control chip to provide visual and auditory feedback on the operating status. The circuit includes an LED indicator, a buzzer, and a driver transistor.

[0123] The anode of the LED indicator is connected to pin 1 of the VB903 control chip via a first current-limiting resistor, and the cathode is grounded. Preferably, a 1kΩ resistor (R12) is used as the current-limiting resistor to control the LED operating current within a safe range. This resistor value is selected based on the LED's forward voltage drop (approximately 2.0V), drive voltage (3.3V), and target current (approximately 1.3mA), ensuring sufficient LED brightness without overloading the VB903 output pin. The LED is a high-brightness green light-emitting diode, achieving a brightness of over 2mcd at a drive current of 1.3mA, ensuring visibility in various lighting conditions.

[0124] The buzzer is connected to the VBAT power supply to provide operating voltage. This embodiment uses a piezoelectric buzzer with an operating voltage of 3.7V-4.2V, low power consumption, and clear sound. The buzzer has a sound pressure level of 85dB@10cm and a frequency of 2.7kHz±0.5kHz, which is within the frequency range most sensitive to the human ear, ensuring that the prompt tone can be clearly heard by the user.

[0125] The base of the driver transistor is connected to pin 2 of the VB903 control chip via a second current-limiting resistor. The collector is connected to the buzzer's driver terminal, and the emitter is grounded. Preferably, a 1kΩ resistor R23 is used as the second current-limiting resistor, and an NPN transistor Q6 is used as the driver. The transistor selection is similar to that used in the infrared transmitter circuit, with high current gain and low saturation voltage drop to ensure reliable buzzer driving without damaging the VB903 chip.

[0126] The LED indicator and buzzer provide visual and auditory feedback based on preset patterns. For example, when a command is successfully recognized, the LED flashes once and the buzzer beeps briefly. When a command is successfully executed, the LED stays on for 0.5 seconds and the buzzer beeps briefly. When a command fails to be recognized, the LED flashes twice quickly. When a command fails to be executed, the LED flashes three times quickly and the buzzer beeps twice shortly. This multimodal feedback mechanism significantly enhances the user experience and makes operation more intuitive and convenient.

[0127] The system also supports charging status indicators. For example, the LED displays a breathing light effect during charging, with the brightness changing periodically in direct proportion to the charging current; the LED remains on when charging is complete; the LED flashes slowly (once every 5 seconds) in standby mode; and the LED flashes rapidly (10 times / second) in abnormal conditions. Users can also query the battery level using the voice command "battery status," and the system will indicate the battery level by the number of LED flashes (1-4 times corresponds to 25%-100%). This comprehensive range of status indicators allows users to intuitively understand system status and enhance the user experience.

[0128] The multi-protocol intelligent mobile power supply and its integrated control system for air conditioning partners achieve resource sharing and module collaboration during operation, forming an efficient and stable workflow. The system includes three main information flow paths: charging protocol identification and management flow, air conditioning control information flow, and status monitoring and feedback flow. These information flows coordinate with each other to ensure efficient system operation.

[0129] The system achieves shared power, processing, and storage resources, improving resource utilization. The power bank and the AC Companion module share a single battery, and dynamic power allocation adjusts power supply to each module based on task priority. In low-battery situations, the system prioritizes charging and appropriately reduces AC Companion functionality to ensure core functionality is not affected.

[0130] The main control chip U1 coordinates system resources, using a time-slicing strategy: charging control accounts for 60%, protocol processing accounts for 20%, and AC Companion accounts for 20%. The interrupt handling mechanism follows a priority rule: key interrupt > charging exception interrupt > voice command interrupt > scheduled task, ensuring timely response to important events.

[0131] In terms of storage resources, protocol parameters and air conditioner remote control codes share Flash memory space, with the storage partitioning being: 20% for system parameters, 30% for the protocol library, 40% for the remote control code library, and 10% for user settings. The system employs a write optimization strategy to reduce frequent writes and extend Flash life. For example, user settings are written to Flash only when they change, rather than with every operation, significantly reducing the number of Flash erase and write cycles.

[0132] The system implements dynamic power consumption adjustment, state synchronization mechanisms, and coordinated exception handling to ensure coordinated operation of all modules. In charging priority mode, the system reduces the sampling frequency of the AC Companion module to ensure charging efficiency; in control priority mode, it increases the voice sampling rate and processing priority to ensure timely control response; in balanced mode, it dynamically adjusts resource allocation to balance both functions.

[0133] The state synchronization mechanism is implemented through a shared state table. The master control chip maintains a global state table, which is updated and read by each module in real time. When key states change, the master control chip notifies the relevant modules to ensure system consistency. Conflict resolution uses clear priority rules to effectively resolve resource contention.

[0134] Exception handling collaboration employs a hierarchical fault handling strategy, taking different action based on fault severity. The system supports module isolation, ensuring that a single module failure does not impact overall system operation. Furthermore, the system includes a recovery mechanism that automatically attempts to restore the faulty module and, if necessary, restarts related modules, improving system reliability.

[0135] When an external device is connected to the power bank via the Type-C port, the protocol identification module in the main control chip automatically detects and identifies the charging protocol supported by the device. The protocol parameter selection module selects the optimal voltage and current combination based on the identification result, and the protocol conversion module converts the parameters into control signals and sends them to the dynamic power management module.

[0136] The dynamic power management module's voltage detection unit continuously monitors the input voltage, the current control unit dynamically adjusts the charging current based on the voltage, and the PWM control unit generates a corresponding PWM signal to control the output current. This entire process forms a closed-loop control loop, ensuring charging efficiency and safety.

[0137] At the same time, the battery protection unit monitors the battery voltage, shuts down the output when the voltage is lower than 2.8V, and shuts down the battery when the voltage is lower than 2.4V, realizing a dual-stage protection mechanism.

[0138] To control the air conditioner, the user issues voice commands, such as "Turn on the air conditioner." The voice input circuit collects the voice signal and transmits it to the VB903 control chip for processing. After the chip recognizes the command, it generates a corresponding infrared control code, which is sent to the air conditioner via the infrared transmitter circuit. Throughout this process, the status indicator circuit provides operational status feedback through a flashing LED and a buzzer.

[0139] The system also supports a learning function. Users can aim the original remote control at the infrared receiver circuit, and the system will automatically learn and store the control code, enabling control of the new model air conditioner. The learning process follows a specific interactive logic: the user enters pairing mode by clicking the button three times, and the LED flashes rapidly to indicate that the learning state has begun. The user then points the original remote control at the receiver and presses the button to be learned. The system receives the signal and analyzes the encoding format, with the LED flashing to indicate successful reception. The user presses the same button again, and the system compares the signal to confirm the accuracy of the learning. Finally, the user confirms the learning completion with a single button, and the system saves the remote control code and exits learning mode.

[0140] The system also implements single-button multi-function control logic, including power on / off, mode switching, and special function triggering. A single button turns the system on or switches modes, a three-second press triggers a forced shutdown, a double-click performs a normal shutdown, a triple-click enters pairing mode, and a quadruple-click restores to factory settings. Mode switching follows a fixed sequence: charging mode → air conditioning control mode → dual-function mode → charging mode, with each transition indicated by a corresponding LED.

[0141] Through the above workflow, the present invention realizes the organic combination of multi-protocol compatibility, dynamic power management, air conditioning control and safety protection functions, and provides users with an efficient, convenient and safe mobile power solution.

[0142] The multi-protocol intelligent mobile power supply and its air-conditioning companion integrated control system of the present invention have excellent performance indicators and significant technical advantages.

[0143] In terms of charging performance, the system supports more than 10 fast charging protocols, including PD2.0 / 3.0, QC2.0 / 3.0, AFC, and FCP, with extremely high compatibility. In terms of charging efficiency, the conversion efficiency reaches 93% under 5V / 1A load and 90% under 9V / 2.2A load, which is at the industry-leading level. In terms of dynamic response, when the voltage fluctuates, the current adjustment response time does not exceed 10ms, which can effectively cope with rapidly changing load conditions. In terms of temperature adaptability, the charging operating temperature range is 0-50℃, and the discharge temperature range is -20-60℃, adapting to various usage environments.

[0144] The Air Conditioner Companion boasts an effective infrared transmission range of 8 meters, fully meeting the needs of home use. It supports 95% of the infrared protocols of mainstream air conditioner brands, eliminating the need for user compatibility concerns. Voice recognition boasts an accuracy rate exceeding 85% at 80dB ambient noise, ensuring smooth operation even in noisy environments. Response time, from voice command to infrared transmission, is less than 500ms, making the delay virtually imperceptible.

[0145] In terms of overall system performance, the 3000mAh battery can operate continuously for over 60 days in pure standby mode, significantly reducing charging frequency. In terms of low power consumption, the standby current is as low as 3μA (at a battery voltage of 2V), and the current does not exceed 100μA after 5 minutes of shutdown, significantly extending standby time. In terms of reliability, the MTBF (mean time between failures) exceeds 50,000 hours, ensuring a long service life. In terms of safety, the system has passed UL / CE / FCC and other safety certifications, meeting international safety standards.

[0146] In summary, the multi-protocol intelligent mobile power supply and its air-conditioning companion integrated control system of the present invention successfully solve the technical problems of existing mobile power supplies such as insufficient compatibility, inefficient power management, single function and imperfect safety protection through innovative technical solutions, providing users with an efficient, convenient and safe mobile power supply solution.

[0147] Those skilled in the art will appreciate that the foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Without departing from the purpose of the present invention, those skilled in the art may make various changes and modifications within the scope of the claims, and such changes and modifications shall fall within the scope of protection of the present invention.

Claims

1. Multi-protocol intelligent mobile power supply, characterized by: include: The main control chip is used to identify the charging protocol supported by the external device and generate the corresponding control signal; A dynamic power management module is electrically connected to the main control chip, and is used to receive a control signal sent by the main control chip, monitor the input voltage in real time, and dynamically adjust the charging current based on the input voltage; TYPE-C interface, electrically connected to the main control chip, used to establish a physical connection with an external device and transmit a protocol identification signal; TYPE-A interface, electrically connected to the main control chip, for outputting charging current; as well as A battery protection unit is electrically connected to the dynamic power management module and is used to shut down the output when the battery voltage is lower than a first threshold and shut down the battery when the battery voltage is lower than a second threshold, wherein the first threshold is greater than the second threshold.

2. The multi-protocol intelligent mobile power supply according to claim 1, characterized in that: The main control chip includes: Protocol identification module, used to identify multiple fast charging protocols including PD protocol, QC protocol and AFC protocol; a protocol parameter selection module, electrically connected to the protocol identification module, for selecting an optimal voltage and current combination based on the identification result; and A protocol conversion module is electrically connected to the protocol parameter selection module and is used to convert the optimal voltage and current combination into a control signal and send it to the dynamic power management module.

3. The multi-protocol intelligent mobile power supply according to claim 1, characterized in that: The dynamic power management module includes: A voltage detection unit is used to collect input voltage values ​​through a voltage divider resistor network; a current control unit, electrically connected to the voltage detection unit, and configured to calculate a maximum allowable charging current according to the input voltage value; and The PWM control unit is electrically connected to the current control unit and is used to generate a PWM signal to control the charging current.

4. The multi-protocol intelligent mobile power supply according to claim 3, characterized in that: The current control unit is used for: When the input voltage value is higher than a preset threshold value, maintaining the charging current at a preset maximum value; When the input voltage value is within the critical range, reducing the charging current according to a preset proportional factor; as well as When the input voltage is lower than a safety threshold, the charging current is reduced to zero.

5. The multi-protocol intelligent mobile power supply according to claim 1, characterized in that: The battery protection unit includes: The first protection IC has its pin 1 connected to the positive terminal of the battery through a resistor; a second protection IC, whose pin No. 1 is electrically connected to the pin No. 4 of the first protection IC; and a MOSFET switch, the gate of which is electrically connected to pin 1 of the second protection IC, and the source and drain of which are connected in series in the negative electrode circuit of the battery; The first threshold is 2.8V, and the second threshold is 2.4V.

6. An air conditioning companion integrated control system, applied to the multi-protocol smart mobile power supply according to any one of claims 1 to 5, characterized in that: include: VB903 control chip, electrically connected to the main control chip, for receiving control instructions and converting them into infrared control signals; an infrared receiving circuit, electrically connected to pin 16 of the VB903 control chip, for receiving signals from an air conditioner remote controller and learning air conditioner control codes; an infrared transmitting circuit, electrically connected to pin 15 of the VB903 control chip, for transmitting an infrared control signal to the air conditioning equipment; A voice input circuit is electrically connected to pins 5 and 6 of the VB903 control chip and is used to collect user voice commands; as well as The status indication circuit is electrically connected to the No. 1 and No. 2 pins of the VB903 control chip and is used to provide visual and auditory feedback on the operating status.

7. The air conditioning companion integrated control system according to claim 6, characterized in that: The infrared receiving circuit comprises: An infrared receiver, whose output pin is connected to pin 16 of the VB903 control chip via an IR_RX signal line; a pull-up resistor, one end of which is connected to the power pin of the infrared receiver and the other end of which is connected to the IRVDD power supply; and The filter capacitor is connected in parallel to both ends of the pull-up resistor and is used to eliminate power supply noise.

8. The air-conditioning companion integrated control system according to claim 6, characterized in that: The infrared emission circuit comprises: Infrared emitting diode, the anode of which is connected to the VBAT power supply through a current limiting resistor; a driving transistor, wherein the collector is connected to the cathode of the infrared emitting diode and the emitter is grounded; and The base current limiting resistor has one end connected to the base of the driving transistor and the other end connected to pin 15 of the VB903 control chip through the IR_TX signal line.

9. The air conditioning companion integrated control system according to claim 6, characterized in that: The voice input circuit comprises: A microphone, the positive electrode of which is connected to pin 5 of the VB903 control chip through a bias resistor, and the negative electrode is grounded; and A coupling capacitor, one end of which is connected to the output end of the microphone, and the other end is connected to pin 6 of the VB903 control chip, for filtering out DC components.

10. The air-conditioning companion integrated control system according to claim 6, characterized in that: The status indication circuit comprises: An LED indicator light, whose anode is connected to pin 1 of the VB903 control chip via a first current-limiting resistor, and whose cathode is grounded; Buzzer, connected to VBAT power supply; and A driving transistor, the base of which is connected to the No. 2 pin of the VB903 control chip through a second current-limiting resistor, the collector of which is connected to the driving end of the buzzer, and the emitter of which is grounded; The LED indicator light and the buzzer provide visual and auditory feedback according to a preset mode.

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