Ultra-thin intelligent travel charger convenient to carry

Abstract

The invention relates to the field of electronic charging, in particular to a portable ultra-thin intelligent travel charger and a control method thereof.The portable ultra-thin intelligent travel charger comprises a shell, a power mainboard, a battery, a charging plug and a charging socket, the power mainboard and the battery are arranged in the shell, the charging plug is arranged on one side of the shell, and the charging socket is arranged on the other side of the shell. A charging socket is arranged on the end face of the shell, a specific control method is adopted, the specific control method comprises the steps of equipment feature recognition, environmental parameter collection, dynamic power distribution, multi-mode switching control, abnormal fusing protection and the like, and various strategies and mechanisms such as temperature compensation, submodule polling and power input detection are further adopted. According to the invention, the device is convenient to carry, can carry out power dynamic distribution and multi-mode charging control according to the device characteristics and environmental parameters, has the functions of abnormal fusing protection, temperature compensation and the like, can achieve the multi-device charging priority distribution and power balance, and improves the charging safety and efficiency.

Description

Technical Field

[0001] The present application relates to the field of electronic charging technology, and in particular to an ultra-thin smart travel charger that is easy to carry. Background Art

[0002] With the continuous advancement of electronic devices, portable electronic devices such as smartphones and tablets have become indispensable tools in people's lives and work. The popularity of these devices has led to a growing demand for on-the-go charging. Travel chargers, devices that can charge electronic devices on the go, are becoming increasingly important. With technological advancements, users' expectations for travel chargers are also increasing. They not only want excellent charging performance but also require greater portability and compactness to accommodate diverse usage scenarios and travel needs. This has driven continuous innovation and development in travel charger technology to meet the diverse needs of the market.

[0003] Traditional travel charger designs typically employ complex circuitry to implement charging functionality. These typically require a large power supply motherboard to house various electronic components, and the battery is also relatively large to ensure sufficient power reserves. The layout of charging plugs and sockets is fragmented, lacking a unified and rational integrated design. Charging control often relies on a fixed power output, without dynamic adjustments based on the characteristics of the connected device or environmental factors. While this traditional design approach can meet basic charging needs to a certain extent, it also has significant limitations.

[0004] However, traditional travel chargers have numerous drawbacks. Due to the bulky power supply and battery, the chargers are bulky and heavy, making them difficult to carry. Furthermore, their fixed power output cannot dynamically adjust to factors such as the connected device's rated voltage, maximum allowable current, and the charger's internal and ambient temperature. This can lead to issues such as slow charging speeds and overheating, potentially even damaging connected devices. These chargers fail to meet users' demands for efficient and safe charging. Summary of the Invention

[0005] The purpose of this application is to overcome the above technical problems and provide a portable ultra-thin smart travel charger and its control method. A portable ultra-thin smart travel charger includes a housing, a power supply motherboard, a battery, a charging plug, and a charging socket. The power supply motherboard and the battery are built into the housing, the charging plug is provided on one side of the housing, and the charging socket is located on an end face of the housing. The above-mentioned portable ultra-thin smart travel charger adopts the following control method: S1. Device Characterization: Obtain the connected device's rated voltage (Vr) and maximum allowable current (Imax) through the USB-PD protocol handshake, and query the pre-stored device database to obtain the corresponding thermal capacity coefficient (k). S2. Environmental parameter collection: Real-time monitoring of the charger's internal temperature Tc and ambient temperature Ta, and calculation of the dynamic temperature difference ΔT = Tc - Ta. S3. Dynamic power allocation: Calculate the real-time allowable power using the formula Pallow = k × (Tmax - ΔT) × Vr, where Tmax is the preset safety threshold. S4. Multi-mode switching control: When ΔT≤5℃, enable high-frequency pulse mode (1-2MHz) for constant current charging; When 5℃<ΔT≤10℃, switch to duty cycle adjustable mode and reduce the duty cycle by D=1-(ΔT-5) / 10; When ΔT>10°C, the submodule patrol mechanism is activated, dividing the charging circuit into at least three independent units to work alternately; S5. Abnormal fuse protection: When the ΔT increase rate is continuously detected to be ≥ 2°C / s, the main charging circuit will be immediately disconnected and the backup wireless charging module will be activated.

[0006] By adopting the above technical solutions, the smart travel charger is easy to carry and features an ultra-thin structure, integrating multiple charging functions. In the control method, device feature recognition can determine the appropriate thermal capacity coefficient based on the characteristics of different connected devices, achieving precise adaptation. Environmental parameter collection helps to understand the internal and external temperature conditions of the charger. Dynamic power allocation can adjust the allowable power in real time based on temperature differences to ensure the safety and efficiency of the charging process. Multi-mode switching control can flexibly select charging modes according to different temperature differences, improving charging efficiency and stability. Abnormal fuse protection can promptly disconnect the main circuit and activate the backup wireless charging module in the event of abnormal temperature changes to prevent device damage.

[0007] Preferably, in step S3, the temperature compensation coefficient α is set to 0.85+0.02×(Tmax-ΔT). When the ambient temperature Ta≥35°C, the allowable power is automatically corrected to Pallow×α, and the corrected power value is not less than 60% of the rated power.

[0008] By adopting the above technical solution, setting the temperature compensation coefficient can automatically correct the allowable power when the ambient temperature is high (Ta≥35℃), avoiding the adverse effects of high temperature on the charging power, while ensuring that the corrected power value is not less than 60% of the rated power, maintaining a certain charging efficiency and stability.

[0009] Preferably, the submodule patrol mechanism of step S4 specifically includes: Divide the charging circuit into four parallel gallium nitride power units (GaN FETs); The working cycle of each power unit is 30 seconds, and the interval between adjacent units is 2mm; When ΔT>15°C is detected, the system automatically increases to 6 power units and shortens the single operation time to 15 seconds.

[0010] By adopting the above technical solution, the charging circuit is divided into four parallel gallium nitride power units, and the working cycle of each power unit is set to 30 seconds, with a spacing of 2mm between adjacent units. This can rationally divide the charging circuit, avoid concentrated heat, and enhance the heat dissipation effect. When ΔT>15°C is detected, the number of power units is automatically increased to 6 and the single working time is shortened to 15 seconds. This can further disperse the heat at high temperatures, improve the safety and stability of the charger, and ensure the normal charging process.

[0011] Preferably, a power input test is performed before step S1: When the USB-C port input power is detected to be ≥45W, the dual-phase Buck-Boost topology circuit is activated; When the wireless charging coil coupling efficiency is detected to be ≥75%, the magnetic resonance wireless charging mode is enabled first.

[0012] By adopting the above technical solution, power input detection is performed before charging. When the USB-C port input power is ≥45W, the dual-phase Buck-Boost topology circuit is activated, which can more efficiently handle high-power input. When the wireless charging coil coupling efficiency is ≥75%, the magnetic resonance wireless charging mode is preferentially enabled, and charging can be performed using a highly efficient wireless charging method, improving charging flexibility and convenience.

[0013] Preferably, the operating parameters of the backup wireless charging module meet the following requirements: The transmission frequency is adjusted to discrete frequency points within the range of 110-205kHz; The power density is controlled below 3.8W / cm3; When ΔT>10℃, the transmit power is automatically reduced to 50% of the nominal value.

[0014] By adopting this technical solution, the standby wireless charging module's transmit frequency is adjusted to discrete frequency points within the range of 110-205kHz to adapt to different charging needs and reduce interference. The power density is controlled below 3.8W / cm³, which can reduce module heating and ensure safe use. When ΔT>10°C, the transmit power is automatically reduced to 50% of the nominal value to prevent module overheating, extend service life, and ensure charging safety.

[0015] Preferably, the device feature database includes a dynamic learning mechanism: Record the device ID of each charge and the corresponding optimal charging parameter combination; When the same device is charged three times in a row, the historical optimal parameter combination will be automatically applied; Establish the charging efficiency-temperature relationship matrix E_tx = [η_ij]_(m×n); Where i represents the device type and j represents the temperature range.

[0016] By adopting the above technical solution, the dynamic learning mechanism can record the device ID and optimal charging parameter combination for each charge. When the same device is charged three times consecutively, the historical optimal parameter combination is automatically applied, which can improve charging adaptability and efficiency. Establishing a charging efficiency-temperature relationship matrix helps to analyze the charging efficiency under different device types and temperature ranges, and further optimize the charging strategy.

[0017] Preferably, a multi-level fuse strategy is set in step S5: Level 1 warning: When the ΔT increase rate is ≥1.5°C / s, the duty cycle is reduced by 20%; Level 2 protection: When the ΔT increase rate is ≥2.5℃ / s, the main circuit is cut off and the PTC thermistor current limiting is activated; Level 3 Recovery: After the main circuit is cut off, an attempt is made to restore 10% of the base charging power every 120 seconds.

[0018] By adopting this technical solution, a multi-stage fusing strategy is implemented when the temperature differential increases at different rates within the portable, ultra-thin smart travel charger. During Level 1 warning, the duty cycle is reduced to mitigate the rapid temperature rise to a certain extent. During Level 2 protection, the main circuit is disconnected and the PTC thermistor current is limited, effectively avoiding the dangers of high temperatures. Level 3 recovery attempts to gradually restore the base charging power after disconnecting the main circuit, ensuring the smoothest possible charging process and improving the safety and stability of the charger.

[0019] Preferably, the high-frequency pulse mode adopts trapezoidal wave modulation technology, and the specific parameters meet the following requirements: Rising edge time tr = 15 ± 2ns; Flat top duration tp=50-200ns adjustable; Falling edge time tf = 20 ± 3ns; Waveform distortion rate ≤3%.

[0020] By adopting the above technical solution, the portable ultra-thin smart travel charger includes a shell, a power supply motherboard, a battery, a charging plug, and a charging socket. It can complete functions such as device feature recognition, environmental parameter collection, dynamic power distribution, multi-mode switching control and abnormal fuse protection; set the temperature compensation coefficient to correct the allowable power; introduce the air pressure compensation factor to correct the collected temperature for power calculation; set a multi-level fuse strategy to ensure safety; the high-frequency pulse mode adopts trapezoidal wave modulation technology that meets specific parameters, which can accurately control the waveform parameters during the charging process, ensure the stability and accuracy of the waveform, reduce the waveform distortion rate, and thus improve the charging efficiency and stability.

[0021] Preferably, in step S2, an air pressure compensation factor β=0.98(P / 101.325) is introduced, where P is the current atmospheric pressure (kPa), and the collected temperature is corrected to Tc×β, and this correction value is used in all power calculation links.

[0022] By adopting the above technical solution, an air pressure compensation factor is introduced into the temperature collection step of the portable ultra-thin smart travel charger to correct the collected temperature, and the correction value is used in all power calculation links. This can make the power calculation more accurate. Taking into account the impact of air pressure on the performance of the charger, the accuracy of dynamic power distribution during the charging process is improved, and the stable operation and efficient charging of the charger in different air pressure environments are guaranteed.

[0023] Preferably, set a multi-device priority strategy: When ≥2 devices are connected simultaneously, 70% of the power is allocated to the device with battery capacity <30%; When ΔT>8℃, the power balancing algorithm is automatically enabled: P_i = (C_i^1.2) / (Σ_(j=1)^n C_j^1.2) × P_total; C_i: the remaining capacity of the i-th device (unit: mAh); n: total number of devices connected simultaneously; Σ_(j=1)^n: sum j from 1 to n; P_total: total output power of the charger (unit: W).

[0024] By adopting the above technical solution, when multiple devices are connected at the same time, 70% of the power can be allocated preferentially to devices with battery capacity below 30%, meeting the fast charging needs of low-power devices; when the dynamic temperature difference between the inside of the charger and the environment is greater than 8°C, the power balancing algorithm is automatically enabled, and the total output power of the charger can be reasonably allocated according to the remaining capacity of each device, ensuring the safety and stability of charging and avoiding the risks caused by overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of an embodiment of the present application.

[0026] Figure 2 It is a flow chart of the control method in an embodiment of the present application.

[0027] Explanation of the accompanying figures: 1. Shell; 2. Charging plug; 3. Charging socket. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. The described embodiments are merely possible technical implementations of the present invention, but are not limited thereto. Those skilled in the art can fully combine the embodiments of the present invention, and other embodiments obtained without creative work are also within the scope of protection of the present invention.

[0029] This application mainly adopts a combination of ultra-thin design and intelligent charging control to achieve the effect of easy carrying and safe and efficient charging. The following is a further detailed description of this application.

[0030] Example 1: Reference Figure 1 and Figure 2 The portable, ultra-thin smart travel charger provided in the embodiments of the present application includes a housing 11, a power supply motherboard, a battery, a charging plug 22, and a charging socket 33. The power supply motherboard and battery are built into the housing 11. This design protects the power supply motherboard and battery from external impacts such as collisions and dust, thereby extending their service life. The charging plug 22 is located on one side of the housing 11, and the charging socket 33 is located on the end face of the housing 11. This layout makes the positioning of the charging plug 22 and the charging socket 33 more reasonable, facilitating connection with electronic devices and power supplies, and improving ease of use.

[0031] Specifically, the shell 11 can be made of high-strength plastic, which has the advantages of light weight, low cost, and easy processing and molding. It can effectively reduce the overall weight of the charger and make it more convenient to carry. Of course, aluminum alloy can also be used. Aluminum alloy has good heat dissipation performance and aesthetics, which can help the charger dissipate heat to a certain extent and prevent internal components from being damaged due to overheating. The shape of the shell 11 can be designed to be a rectangular parallelepiped with a regular shape, which is easy to store and carry. It is provided with a special card slot and bracket inside to fix the power motherboard and battery. The size of the card slot and bracket is adapted to the power motherboard and battery to ensure their stability in installation.

[0032] The power supply motherboard integrates various electronic components, such as capacitors, resistors, and chips. Capacitors provide filtering and energy storage, while resistors regulate the current and voltage in the circuit. The chip is the core of the power supply motherboard, responsible for controlling various parameters during the charging process. These electronic components are connected together through the wiring on the printed circuit board, forming a complete circuit system. The printed circuit board uses multi-layer wiring technology, which allows for more wiring within a limited space, thereby improving circuit integration. The surface of the power supply motherboard is also coated with a protective lacquer to prevent moisture and oxidation, thereby extending its service life.

[0033] Lithium batteries can be used as batteries. They offer advantages such as high energy density, long life, and low self-discharge, providing ample power reserves for the charger. The positive and negative poles of the battery are connected to the power supply motherboard via wires. These wires have excellent conductivity and insulation, ensuring stable current transmission. To further enhance battery safety, a protective plate can be installed on the battery to prevent overcharging, over-discharging, and short circuits.

[0034] The charging plug 22 can be a common USB plug, which is highly versatile and compatible with most electronic devices. The charging plug 22 is connected to the power supply motherboard via a cable. The cable is of moderate length, making it convenient to use without being too long to cause entanglement. The charging socket 33 can be equipped with multiple different types of interfaces, such as Lightning interfaces and Type-C interfaces, to meet the charging needs of different electronic devices. These interfaces are connected to the power supply motherboard via wiring. When an electronic device is plugged into the charging socket 33, the power supply motherboard can identify the device type and provide the appropriate charging power based on its needs.

[0035] The various components of this smart travel charger are combined to form an organic whole. The housing 11 provides physical support and protection for the other components. The power supply motherboard controls the entire charging process, the battery stores power, and the charging plug 22 and charging socket 33 provide external connectivity. These components work together to enable the charger to safely and efficiently charge electronic devices.

[0036] The smart travel charger adopts the following control methods: S1. Device Characterization: The device obtains the rated voltage (Vr) and maximum allowable current (Imax) of the connected device through the USB-PD protocol handshake, and then queries the pre-stored device database to obtain the corresponding thermal capacity coefficient (k). The USB-PD protocol is a universal charging protocol that enables communication between the charger and the electronic device, accurately obtaining relevant device parameters. The pre-stored device database stores information such as thermal capacity coefficients for a wide range of electronic devices, allowing for quick and easy query.

[0037] S2. Environmental Parameter Collection: Monitor the charger's internal temperature Tc and ambient temperature Ta in real time, calculating the dynamic temperature difference ΔT = Tc - Ta. Temperature monitoring can be performed using a temperature sensor, which offers high accuracy and fast response, enabling timely and accurate temperature data. Calculating the dynamic temperature difference provides a better understanding of the charger's operating status.

[0038] S3. Dynamic Power Allocation: The real-time allowable power is calculated using the formula Pallow = k × (Tmax - ΔT) × Vr, where Tmax is the preset safety threshold. This formula takes into account factors such as the device's thermal capacity, temperature differential, and rated voltage. It dynamically adjusts charging power based on actual conditions, preventing problems such as overheating caused by excessive power.

[0039] S4. Multi-mode switching control: When ΔT ≤ 5°C, high-frequency pulse mode (1-2MHz) is enabled for constant-current charging. High-frequency pulse mode improves charging efficiency and reduces charging time. Constant-current charging ensures current stability during the charging process, protecting the battery of the electronic device.

[0040] When the temperature is 5°C < ΔT ≤ 10°C, the battery switches to adjustable duty cycle mode and reduces the duty cycle by the ratio D = 1 - (ΔT - 5) / 10. Adjustable duty cycle mode dynamically adjusts the charging time ratio based on the temperature difference, thereby reducing charging power and heat generation.

[0041] When ΔT>10°C, the submodule patrol mechanism is activated, dividing the charging circuit into at least three independent units to work alternately. This disperses heat, avoids local overheating, and improves charger safety.

[0042] S5. Abnormal Fuse Protection: If a ΔT increase rate of ≥2°C / s is continuously detected, the main charging circuit is immediately disconnected and the backup wireless charging module is activated. This abnormal fuse protection mechanism takes timely action when the charger overheats, protecting both the electronic device and the charger itself. The backup wireless charging module can continue to charge the electronic device even when the main charging circuit is disconnected, improving the reliability of the charger.

[0043] The working principle of this embodiment is as follows: This portable ultra-thin smart travel charger utilizes a rational structural design, a thin and lightweight housing (11), and an integrated internal layout, significantly reducing its weight and size, making it more portable. Regarding charging control, a series of intelligent control methods dynamically adjust charging power based on the characteristics of the connected device and environmental parameters. Multi-mode switching control and abnormal fuse protection mechanisms effectively prevent overheating during charging, improving charging safety and efficiency. This represents a significant improvement over traditional travel chargers, meeting users' demands for efficient and safe charging.

[0044] Example 2: This embodiment differs from the previous embodiment in that, in step S3, the temperature compensation coefficient α is set to 0.85 + 0.02 × (Tmax - ΔT). When the ambient temperature Ta ≥ 35°C, the allowable power is automatically corrected to Pallow × α, with the corrected power value being no less than 60% of the rated power. This allows for fine-tuning of the charging power based on actual conditions in high-temperature environments, ensuring both charging safety and maintaining a certain level of charging efficiency.

[0045] This embodiment works on the principle that in high-temperature environments, the charger's internal components are more susceptible to heat. Failure to perform power correction can lead to overheating or even damage. By setting a temperature compensation coefficient and dynamically adjusting the power based on temperature differences, the charger can operate stably and safely in high-temperature environments while maintaining a certain level of charging efficiency. This improves the charger's applicability and reliability, further meeting users' charging needs in diverse environments.

[0046] Example 3: This embodiment differs from the previous one in that the submodule patrol mechanism in step S4 specifically includes: dividing the charging circuit into four parallel gallium nitride power units (GaN FETs); each power unit has a 30-second operating cycle, with adjacent units spaced 2 mm apart; and when ΔT > 15°C is detected, the number of power units is automatically increased to six, and the single operating time is shortened to 15 seconds. GaN power units offer advantages such as fast switching speed, high efficiency, and high-temperature resistance. Dividing the charging circuit into multiple power units for alternating operation can better disperse heat and improve heat dissipation. When temperatures are too high, increasing the number of power units and shortening the operating time can further reduce the load on each unit and reduce heat generation.

[0047] The principle behind this embodiment is that the use of gallium nitride power units and a rational patrol mechanism can effectively improve the efficiency and heat dissipation performance of the charging circuit. During normal operation, the four power units rotate in operation, ensuring continuous charging while preventing local overheating. When the temperature rises to a certain level, the number of power units is increased and the operating time is shortened, enabling timely adjustment of the operating state, ensuring stable operation of the charger even in high-temperature environments and improving its safety and reliability.

[0048] Example 4: This embodiment differs from the previous embodiment in that a power input check is performed before step S1: when the USB-C port input power is detected to be ≥45W, the dual-phase Buck-Boost topology circuit is activated; when the wireless charging coil coupling efficiency is detected to be ≥75%, the magnetic resonance wireless charging mode is preferentially enabled. The dual-phase Buck-Boost topology circuit enables more efficient voltage conversion at high power input, improving charging efficiency. The magnetic resonance wireless charging mode has the advantages of long charging distance and high efficiency. When the wireless charging coil coupling efficiency meets the requirements, it is preferentially enabled, providing users with a more convenient charging method.

[0049] The implementation principle of this embodiment is as follows: by performing power input detection before step S1, the most appropriate charging method can be selected based on different power input conditions. When the USB-C port input power is high, activating the dual-phase Buck-Boost topology circuit can fully utilize the high power input and improve charging speed. When the wireless charging coil coupling efficiency meets the requirements, the magnetic resonance wireless charging mode is preferentially enabled, providing users with more charging options and increasing the charger's flexibility and applicability.

[0050] Example 5: This embodiment differs from the previous one in that the backup wireless charging module's operating parameters meet the following requirements: the transmit frequency is adjusted to discrete frequency points within the range of 110-205kHz; the power density is controlled below 3.8W / cm³; and the transmit power is automatically reduced to 50% of the nominal value when ΔT > 10°C. This ensures the backup wireless charging module operates safely and stably under various temperature conditions. Reducing transmit power at high temperatures reduces heat generation and prevents module damage due to overheating.

[0051] The implementation principle of this embodiment is as follows: Properly setting the operating parameters of the backup wireless charging module can improve its operational stability and safety. Adjusting the transmission frequency to discrete frequency points can reduce interference and improve charging efficiency. Controlling the power density and reducing the transmission power at high temperatures can effectively prevent the module from overheating, extend its service life, and ensure that the backup wireless charging module can reliably charge electronic devices in the event of a problem in the main charging circuit.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A portable ultra-thin smart travel charger, characterized by: The device comprises a housing (1), a power supply mainboard, a battery, a charging plug (2), and a charging socket (3); the power supply mainboard and the battery are built into the housing (1); the charging plug (2) is arranged on one side of the housing (1); and the charging socket (3) is located on the end face of the housing (1); The above-mentioned portable ultra-thin smart travel charger adopts the following control method: S1. Device Characterization: Obtain the connected device's rated voltage (Vr) and maximum allowable current (Imax) through the USB-PD protocol handshake, and query the pre-stored device database to obtain the corresponding thermal capacity coefficient (k). S2. Environmental parameter collection: Real-time monitoring of the charger's internal temperature Tc and ambient temperature Ta, and calculation of the dynamic temperature difference ΔT = Tc - Ta. S3. Dynamic power allocation: Calculate the real-time allowable power using the formula Pallow = k × (Tmax - ΔT) × Vr, where Tmax is the preset safety threshold. S4. Multi-mode switching control: When ΔT≤5℃, enable high-frequency pulse mode (1-2MHz) for constant current charging; When 5℃<ΔT≤10℃, switch to duty cycle adjustable mode and reduce the duty cycle by D=1-(ΔT-5) / 10; When ΔT>10°C, the submodule patrol mechanism is activated, dividing the charging circuit into at least three independent units to work alternately; S5. Abnormal fuse protection: When the ΔT increase rate is continuously detected to be ≥ 2°C / s, the main charging circuit will be immediately disconnected and the backup wireless charging module will be activated.

2. The portable ultra-thin smart travel charger according to claim 1, characterized in that: In step S3, the temperature compensation coefficient α is set to 0.85+0.02×(Tmax-ΔT). When the ambient temperature Ta≥35°C, the allowable power is automatically corrected to Pallow×α, and the corrected power value is not less than 60% of the rated power.

3. The portable ultra-thin smart travel charger according to claim 2, characterized in that: The submodule patrol mechanism of step S4 specifically includes: Divide the charging circuit into four parallel gallium nitride power units (GaN FETs); The working cycle of each power unit is 30 seconds, and the interval between adjacent units is 2mm; When ΔT>15°C is detected, the system automatically increases to 6 power units and shortens the single operation time to 15 seconds.

4. The portable ultra-thin smart travel charger according to claim 2, characterized in that: Perform power input detection before step S1: When the USB-C port input power is detected to be ≥45W, the dual-phase Buck-Boost topology circuit is activated; When the wireless charging coil coupling efficiency is detected to be ≥75%, the magnetic resonance wireless charging mode is enabled first.

5. The portable ultra-thin smart travel charger according to claim 1, characterized in that: The operating parameters of the standby wireless charging module meet the following requirements: The transmission frequency is adjusted to discrete frequency points within the range of 110-205kHz; The power density is controlled below 3.8W / cm3; When ΔT>10℃, the transmit power is automatically reduced to 50% of the nominal value.

6. The portable ultra-thin smart travel charger according to claim 5, characterized in that: The device feature database includes a dynamic learning mechanism: Record the device ID of each charge and the corresponding optimal charging parameter combination; When the same device is charged three times in a row, the historical optimal parameter combination will be automatically applied; Establish the charging efficiency-temperature relationship matrix E_tx = [η_ij]_(m×n); Where i represents the device type and j represents the temperature range.

7. The portable ultra-thin smart travel charger according to claim 1, characterized in that: In step S5, a multi-level fuse strategy is set: Level 1 warning: When the ΔT increase rate is ≥1.5°C / s, the duty cycle is reduced by 20%; Level 2 protection: When the ΔT increase rate is ≥2.5℃ / s, the main circuit is cut off and the PTC thermistor current limiting is activated; Level 3 Recovery: After the main circuit is cut off, an attempt is made to restore 10% of the base charging power every 120 seconds.

8. The portable ultra-thin smart travel charger according to claim 7, characterized in that: The high-frequency pulse mode adopts trapezoidal wave modulation technology, and the specific parameters meet the following requirements: Rising edge time tr = 15 ± 2ns; Flat top duration tp=50-200ns adjustable; Falling edge time tf = 20 ± 3ns; Waveform distortion rate ≤3%.

9. The portable ultra-thin smart travel charger according to claim 7, characterized in that: In step S2, a pressure compensation factor β = 0.98 (P / 101.325) is introduced, where P is the current atmospheric pressure (kPa). The collected temperature is corrected to Tc × β. This correction value is used in all power calculation links.

10. The portable ultra-thin smart travel charger according to claim 7, characterized in that: To set a multi-device priority policy: When ≥2 devices are connected simultaneously, 70% of the power is allocated to the device with battery capacity <30%; When ΔT>8℃, the power balancing algorithm is automatically enabled: P_i = (C_i^1.2) / (Σ_(j=1)^n C_j^1.2) × P_total; C_i: the remaining capacity of the i-th device (unit: mAh); n: total number of devices connected simultaneously; Σ_(j=1)^n: sum j from 1 to n; P_total: total output power of the charger (unit: W).

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