A mobile power supply

Abstract

The utility model discloses a kind of mobile power supply, comprising: at least one wired charge-discharge interface, wireless charging module, control module, protection module and energy storage module;Wired charge-discharge interface, wireless charging module are connected with control module respectively, protection module is connected with control module, energy storage module respectively;Wired charge-discharge interface is used to be connected with load, charges load by energy storage module, or be connected with power supply, charges energy storage module by power supply;Wireless charging module is used to be wirelessly connected with load, wirelessly charges load by energy storage module;Control module configuration is used for the charging, discharging control of mobile power supply;Protection module configuration is used for charging, discharging protection to energy storage module.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and in particular to a mobile power supply. Background Technology

[0002] With the widespread adoption of smart devices (such as smartphones, tablets, and wireless headphones), users are increasingly reliant on portable power banks, and their needs have shifted from simply replenishing power to multifunctional, efficient, and safe power supplies. Traditional portable power banks offer limited charging methods, have a limited range of interface types, and suffer from low charging efficiency; meanwhile, the rise of wireless charging technology has increased users' demand for contactless charging.

[0003] To address the aforementioned issues, there is an urgent need for a portable power bank that integrates multiple types of interfaces, supports wired and wireless dual-mode charging, and possesses intelligent control and comprehensive protection functions to meet the charging needs of diverse devices. Utility Model Content

[0004] This utility model provides a portable power supply to address at least one defect in the existing technology.

[0005] This utility model embodiment provides a portable power bank, including:

[0006] At least one wired charging / discharging interface, a wireless charging module, a control module, a protection module, and an energy storage module;

[0007] The wired charging and discharging interface and the wireless charging module are respectively connected to the control module, and the protection module is respectively connected to the control module and the energy storage module.

[0008] The wired charging and discharging interface is used to connect to a load and charge the load through the energy storage module, or to connect to a power source and charge the energy storage module through the power source.

[0009] The wireless charging module is used to wirelessly connect to the load and wirelessly charge the load through the energy storage module.

[0010] The control module is configured for charging and discharging control of the mobile power supply;

[0011] The protection module is configured to provide charging and discharging protection for the energy storage module.

[0012] Optionally, the wired charging and discharging interface includes a TYPE-C interface and a USB-A interface.

[0013] Optionally, the signal pins of the wired charging / discharging interface are equipped with an electrostatic discharge protection module.

[0014] Optionally, the control pin of the control module is connected to the power pin of the wired charging and discharging interface via a power MOS.

[0015] Optionally, the wireless charging module includes a wireless chip, which is equipped with a wireless coil;

[0016] A resonant capacitor is also provided between the wireless coil and the wireless chip;

[0017] The control module and the wireless chip are configured for controlling wireless charging.

[0018] Optionally, the wireless coil is equipped with a positioning magnet for positioning alignment between the load and the wireless coil.

[0019] Optionally, the wireless chip is equipped with a first temperature detection module, which is used for temperature detection of the wireless chip.

[0020] Optionally, the control module is configured with a second temperature detection module, which is used for temperature detection of the control module.

[0021] Optionally, the protection module is further configured with a decoupling protection circuit, which is connected to the control module and the protection module. The decoupling protection circuit is used for signal conditioning and protection of the control module and the protection module.

[0022] Optionally, the energy storage module includes a battery.

[0023] Compared with existing technologies, the advantages of this utility model are as follows: This utility model proposes a portable power bank that integrates wired charging and discharging, and wireless charging functions. It can meet the wired fast charging needs of traditional devices and is also compatible with loads with wireless charging capabilities (such as smartphones, headphones, etc.), eliminating the need for additional cables, thus improving ease of use and adapting to charging needs in different scenarios. The control module centrally manages the charging and discharging process, automatically adjusting current and voltage parameters according to the energy storage module's power status and load type (such as the charging protocols of different devices), avoiding energy waste, and simultaneously achieving a balance between fast charging and device protection, extending the lifespan of both the device and the power bank itself. The protection module is directly linked to the energy storage module and the control module, capable of real-time monitoring of abnormal conditions such as overcharging, over-discharging, overcurrent, short circuit, and over-temperature, and quickly cutting off the circuit through the control module, effectively reducing safety risks and ensuring the safety of users and devices. Attached Figure Description

[0024] Figure 1 This is a block diagram of the mobile power supply structure in the embodiment;

[0025] Figure 2This is another mobile power supply structure block diagram in the embodiment;

[0026] Figure 3 This is another mobile power supply structure block diagram in the embodiment. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] Figure 1 This is a block diagram of the mobile power supply structure in the embodiment, for reference. Figure 1 The power bank includes:

[0029] At least one wired charging / discharging interface 100, a wireless charging module 200, a control module 300, a protection module 400, and an energy storage module 500.

[0030] The wired charging and discharging interface 100 and the wireless charging module 200 are respectively connected to the control module 300, and the protection module 400 is respectively connected to the control module 300 and the energy storage module 500.

[0031] The wired charging and discharging interface 100 is used to connect to a load to charge the load through the energy storage module 500, or to connect to a power source to charge the energy storage module 500 through the power source.

[0032] The wireless charging module 200 is used to wirelessly connect to the load and wirelessly charge the load through the energy storage module 500.

[0033] The control module 300 is configured for charging and discharging control of the power bank.

[0034] The protection module 400 is configured to provide charging and discharging protection for the energy storage module 500.

[0035] In this solution, the power bank can be used for wired and wireless charging scenarios. The power bank can be charged. When charging the power bank, an external power source (such as an AC adapter) is connected through the wired charging and discharging interface 100. After the control module 300 detects the charging signal, it starts the charging mode, and the energy storage module 500 is safely charged through the protection module 400.

[0036] In this solution, when the load is charged using a power bank, the load is connected to the wired charging / discharging interface 100 or close to the wireless charging module 200. The control module 300 switches to the discharging mode, and the electrical energy of the energy storage module 500 is transmitted to the load via wired or wireless means through the protection module 400 and the control module 300.

[0037] In this solution, the protection module 400 can be configured to monitor the voltage, current, temperature and other parameters of the energy storage module 500 in real time. In case of abnormality, the linkage control module 300 will cut off the charging and discharging circuit to ensure system safety.

[0038] For example, in this solution, the wired charging / discharging interface 100 can be a USB interface, which can support PD fast charging protocol or QC fast charging protocol, etc. The USB interface is configured with a chip corresponding to the charging protocol, for example, a PD protocol chip or a QC protocol chip. The protocol chip is used to automatically match the charging voltage and charging current required by the load.

[0039] In this solution, when the wired charging and discharging interface 100 is used as a charging input terminal, it receives electrical energy from an external power source and transmits it to the control module 300 to charge the energy storage module 500; when used as a charging output terminal, it transmits the electrical energy of the energy storage module 500 to a wired load (such as a mobile phone or tablet).

[0040] In this solution, the charging / discharging mode can be switched using the control module 300 in conjunction with the power switch unit, avoiding conflicts caused by direct connection between the power supply and the load.

[0041] For example, in this solution, the wireless charging module 200 may include a transmitting coil, which may be a circular PCB coil. The wireless charging module 200 may also include a resonant unit, which may include a resonant capacitor, and the resonant capacitor and the transmitting coil form an LC resonant circuit.

[0042] The wireless charging module 200 may also include a wireless transmitting chip, which employs a wireless charging control chip. This chip can integrate functions such as PWM modulation, power amplification, and foreign object detection. The wireless charging module 200 may also include a driving unit, which amplifies the high-frequency signal output by the transmitting chip and drives the coil to generate an alternating magnetic field.

[0043] In this solution, the wireless charging module 200 generates an alternating magnetic field through a transmitting coil, which couples with the receiving coil of the load (such as a mobile phone that supports wireless charging) to achieve contactless power transmission.

[0044] In this solution, the control module 300 can be a microcontroller, and can be configured with a communication interface and an ADC sampling unit. The control module 300 can be configured to detect the voltage of the wired interface through a voltage divider resistor network and to detect the charging and discharging current through a sampling resistor.

[0045] In this solution, the control module 300 can be specifically configured to automatically switch charging and discharging modes based on the plugging / unplugging status of the wired interface and the foreign object detection results of the wireless module.

[0046] In this solution, the protection module 400 may include a protection IC, which is a dedicated lithium battery protection chip that can integrate overcharge, over-discharge and overcurrent detection functions.

[0047] In this scheme, when the voltage of the energy storage module 500 exceeds the overcharge threshold or falls below the over-discharge threshold, the protection IC controls the disconnection of the charging and discharging path; when the charging and discharging current exceeds the threshold, the protection IC immediately controls the disconnection of the charging and discharging path.

[0048] In this solution, the energy storage module 500 may include a battery pack for storing electrical energy and continuously discharging it. The energy storage module 500 may also include a voltage conversion unit, which integrates a DC-DC chip. The DC-DC chip is used to convert the electrical energy output by the energy storage module 500 into operating power for power consumption units such as the control module 300.

[0049] This embodiment proposes a portable power bank that integrates wired charging and discharging as well as wireless charging functions. It meets the wired fast charging needs of traditional devices and is also compatible with loads that support wireless charging (such as smartphones and headphones), eliminating the need for additional cables, thus improving ease of use and adapting to charging needs in various scenarios. The control module centrally manages the charging and discharging process, automatically adjusting current and voltage parameters based on the energy storage module's power status and load type (such as the charging protocols of different devices) to avoid energy waste. It also achieves a balance between fast charging and device protection, extending the lifespan of both the device and the power bank itself. The protection module, directly linked to the energy storage module and control module, monitors for overcharging, over-discharging, overcurrent, short circuits, over-temperature, and other abnormal conditions in real time. The control module quickly cuts off the circuit, effectively reducing safety risks and ensuring the safety of the user and the device.

[0050] Based on any of the aforementioned solutions, in one possible implementation, the wired charging and discharging interface includes at least a TYPE-C interface and a USB-A interface.

[0051] In this solution, the power bank is equipped with a TYPE-C interface and a USB-A interface. The TYPE-C interface and the USB-A interface are connected to the control module 300 through their respective protocol processing units, forming two independent but collaborative paths.

[0052] The TYPE-C interface supports bidirectional charging and discharging (it can charge the energy storage module 500 and also power the load), and is compatible with the PD fast charging protocol; the USB-A interface supports discharging (to power the load).

[0053] In this design, the TYPE-C interface can use a 16-pin TYPE-C female connector, supporting reversible insertion, and the outer casing has a metal shield to resist electromagnetic interference. The TYPE-C interface can integrate a PD protocol controller. The TYPE-C interface can be configured with a first power MOSFET as a charge / discharge switch, and the gate of the first power MOSFET is connected to the control pin of the control module 300.

[0054] In this solution, when an external power source (such as a PD charger) is detected, the PD protocol controller identifies the power type through the CC pin, and the control module 300 drives the first power MOSFET to conduct the charging path. The electrical energy is stored in the energy storage module 500 through the control module 300 and the protection module 400. When a load (such as a mobile phone) is connected, the PD protocol controller negotiates the voltage and current with the load, the control module 300 switches to the discharge mode, and the electrical energy of the energy storage module 500 is output through the TYPE-C interface.

[0055] In this solution, the USB-A interface can use a standard USB-A female connector (4 pins: VCC, D+, D-, GND). The USB-A interface integrates a QC2.0 / 3.0 protocol chip and communicates with the load through the D+ and D- pins. The USB-A interface can be configured with a second power MOSFET as a discharge switch, and the second power MOSFET is controlled by the control pins of the control module 300.

[0056] In this solution, the USB-A interface is used as the output interface. When a load is inserted, the protocol chip detects the load type through the D+ and D- pins. After the control module 300 receives the load access signal, it turns on the second power MOSFET, and the power of the energy storage module 500 is output through the USB-A interface.

[0057] In this solution, the TYPE-C interface can cover PD fast charging devices, and the USB-A interface is compatible with traditional devices, which can meet the charging and discharging needs of various products such as mobile phones, tablets, headphones, and small home appliances.

[0058] Based on any of the aforementioned solutions, in one possible implementation, the signal pins of the wired charging / discharging interface are equipped with an electrostatic discharge protection module.

[0059] For example, in this solution, if the wired charging and discharging interface adopts a TYPE-C interface, the electrostatic protection module may include a TVS diode, with the anode of the TVS diode connected to GND and the cathode connected to the CC1, CC2, D+, and D- pins respectively.

[0060] For example, in this solution, connecting a ferrite bead in series between the TVS diode and the pin can further suppress high-frequency electrostatic interference without affecting low-frequency signal transmission.

[0061] For example, in this solution, if the wired charging / discharging interface uses a USB-A interface, the electrostatic discharge protection module may include a TVS diode. The TVS diode is connected in parallel between the D+ and D- pins and GND, that is, one end of the diode is connected to D+ / D-, and the other end is connected to GND.

[0062] In this solution, by setting up an electrostatic discharge (ESD) protection module, the reliability of the wired charging and discharging interface can be improved while ensuring ESD protection capability and taking into account signal integrity and cost-effectiveness.

[0063] Based on any of the aforementioned schemes, in one possible implementation, the control pin of the control module is connected to the power pin of the wired charging and discharging interface via a power MOS.

[0064] In this solution, the control module (such as an MCU) outputs high and low level signals through the GPIO control pins. After being amplified by the drive circuit, these signals are applied to the gate (G) of the power MOSFET to control the on / off state of the MOSFET. When the MOSFET is on, the power supply pin of the wired charging and discharging interface forms a path with the energy storage module (or external power supply) to achieve charging or discharging. When the MOSFET is off, the power supply path is disconnected, and charging and discharging stop.

[0065] For example, in this solution, a MOSFET can be used as a common switch for the charging and discharging path. Its drain (D) is connected to the VBUS pin of the TYPE-C interface, and its source (S) is connected to the common charging and discharging terminal of the energy storage module (such as a lithium battery). The power management chip confirms whether to charge or discharge through a protocol handshake. If an upstream power supply device is detected, the voltage of the CC pin is 5V / 3.3V, which indicates the charging mode. If a downstream power receiving device is detected, the CC pin is pulled down to a low level, which indicates the discharging mode.

[0066] The gates of Q1 and Q2 are connected to GPIO1 and GPIO2 of the control module through a resistor, respectively. Pull-down resistors are connected in parallel between the gate and source of Q1 and between the gate and source of Q2.

[0067] For example, in this solution, when the TYPE-C interface is connected to an external power source, the control module identifies it as a power device through the CC pin, and GPIO1 outputs a high level to drive Q1 to conduct, thereby charging the energy storage module 500; after charging is completed, GPIO1 outputs a low level, Q1 is turned off, and charging stops.

[0068] When a load is connected to the TYPE-C interface, GPIO2 outputs a high level to drive Q2 to conduct, and the energy storage module discharges to the load through Q2; after the load is removed, GPIO2 outputs a low level, and Q2 is turned off.

[0069] Based on any of the aforementioned solutions, in one possible implementation, the wireless charging module includes a wireless chip, which is equipped with a wireless coil; a resonant capacitor is also configured between the wireless coil and the wireless chip; and a control module and the wireless chip are configured for controlling wireless charging.

[0070] In this scheme, the wireless chip is used to generate a high-frequency alternating current (e.g., 100~205kHz), which is amplified by the driving circuit and then input into the wireless coil.

[0071] The wireless coil and resonant capacitor form an LC resonant circuit, which generates a strong alternating magnetic field under high-frequency current excitation, forming magnetic coupling with the receiving coil (load side) to realize wireless energy transmission.

[0072] In this solution, the control module configures the output power of the wireless chip and starts / stops charging through a communication interface (such as an I2C interface), and receives feedback from the chip on voltage, current, temperature and other statuses to achieve closed-loop control.

[0073] The capacitance of the resonant capacitor is precisely matched with the inductance of the coil to ensure that the circuit operates at the resonant frequency, reduce reactive power loss, and improve transmission efficiency.

[0074] Based on any of the aforementioned schemes, in one possible implementation, the wireless coil is equipped with a positioning magnet for positioning and alignment between the load and the wireless coil.

[0075] In this solution, the positioning magnet can be a magnet array set around the wireless transmitting coil: when the load approaches the wireless charging module, the positioning magnet of the transmitting coil attracts the magnet of the receiving end, thereby achieving auxiliary load positioning.

[0076] For example, in this scheme, N magnets can be arranged at equal intervals along the circumference outside the transmitting coil to form a circular array. The polarities of adjacent magnets alternate to form a symmetrical magnetic field distribution.

[0077] In this solution, the design of the positioning magnet enables charging without manual alignment; it can be automatically positioned simply by placing the device on the ground.

[0078] Based on any of the aforementioned solutions, in one possible implementation, the wireless chip is equipped with a first temperature detection module, which is used for temperature detection of the wireless chip.

[0079] In this solution, the first temperature detection module can be set inside or outside the wireless chip. By collecting the junction temperature or casing temperature of the wireless chip, the temperature signal is converted into an electrical signal and transmitted to the internal logic unit or control module of the wireless chip.

[0080] For example, in this solution, the wireless chip can execute different control strategies based on the temperature detected by the first temperature detection module. For instance, when the temperature of the wireless chip reaches the warning value, the current power output is maintained; when the temperature continues to rise and reaches the alarm value, the output power is halved; and when the temperature exceeds the set threshold, wireless charging is stopped.

[0081] In this solution, the warning value can be the upper limit of the normal operating temperature range of the wireless chip; the alarm value can be the judgment value for the wireless chip entering the risk zone, such as 90% of the rated operating temperature; and the set threshold can be the value at which the wireless chip may suffer irreversible damage after its temperature exceeds the value.

[0082] Based on any of the aforementioned solutions, in one possible implementation, the control module is equipped with a second temperature detection module, which is used for temperature detection of the control module.

[0083] In this solution, the control module is equipped with a second temperature detection module. The second temperature detection module can be configured to monitor the operating temperature of its own core circuit. Through built-in logic, it realizes overheat protection and low power consumption regulation, so as to avoid the performance degradation or damage of the control module due to high temperature environment or continuous high load, and ensure the stable operation of the entire power bank.

[0084] For example, in this solution, the second temperature detection module can be an external NTC module. The thermistor in the NTC module can be set at the heat dissipation pad of the control module, and the thermistor and the resistor are connected in series to form a voltage divider circuit. The voltage divider point is connected to the non-inverting input of the operational amplifier, and after amplification, it is output to the analog input pin of the control module to convert the temperature signal into a voltage in the range of 0~3.3V.

[0085] For example, in this solution, based on the temperature detected by the second temperature detection module, the control module can execute different control strategies, such as:

[0086] When the temperature is below the preset temperature (e.g., 60℃), the control module maintains full-function operation, supporting wired / wireless charging and discharging output. When the temperature reaches 60℃~70℃, the power of the wireless charging module is limited; when the temperature reaches 70℃~80℃, the power of wired charging is limited; when the temperature exceeds the temperature threshold (e.g., 80℃), all charging and discharging channels are shut down.

[0087] Based on any of the aforementioned solutions, in one possible implementation, the protection module is further configured with a decoupling protection circuit, which is connected to the control module and the protection module. The decoupling protection circuit is used for signal conditioning and protection of the control module and the protection module.

[0088] In this solution, the decoupling protection circuit is used to filter noise, stabilize voltage, and protect against abnormal surges in the interactive signals between the control module and the protection module, ensuring accurate transmission of communication and control commands between the two, while protecting sensitive chips from damage caused by electrical interference.

[0089] For example, in this solution, the decoupling protection circuit may include devices such as capacitors, inductors, resistors, and TVS diodes. The power supply pin of the control module is connected to the input terminal of the decoupling protection circuit. The decoupling protection circuit contains a series resistor, a parallel electrolytic capacitor, and a ceramic capacitor, with the other end of the capacitor grounded, forming a π-type filter network.

[0090] The protection enable signal output by the control module is connected in series with a resistor, then in parallel with a capacitor (grounded) and a bidirectional TVS diode, and finally connected to the enable pin of the protection module.

[0091] The current sampling signal of the protection module is first filtered by a capacitor, then connected in series with a resistor, then in parallel with a TVS diode, and finally connected to the ADC pin of the control module.

[0092] The fault signal of the protection module is grounded through a capacitor, connected to the interrupt pin of the control module through a series resistor, to ensure a smooth fault signal.

[0093] The ground terminals of all capacitors and TVS diodes are directly connected to the analog ground of the control module, and connected to the power ground through a single point via a 0Ω resistor to prevent power loop noise from entering the signal ground.

[0094] Figure 2 This is another mobile power supply structure block diagram in the embodiment, see reference. Figure 2 Based on any of the aforementioned solutions, in one possible implementation, the power bank includes:

[0095] TYPE-C interface 101, wireless chip 201, wireless coil 202, control module 300, protection module 400, and battery 501.

[0096] The TYPE-C interface 101 is connected to the control module 300. The wireless chip 201 communicates with the control module 300 via the I2C interface. The wireless chip 201 is equipped with a wireless coil 202, a decoding circuit 203, a resonant capacitor 204, and a first temperature detection module. The control module 300 is connected to the battery 501 via the protection module 400.

[0097] In this solution, the power bank is designed as an ultra-thin, portable magnetic power bank that supports both wired and wireless charging. It can be used for wireless charging of mobile phones while being held in the hand, and is also compatible with wired and wireless charging of headphones, meeting users' portable charging needs in various scenarios.

[0098] In this solution, the control module 300 can also be configured with physical buttons, several white power indicator lights, and several wireless charging indicator lights.

[0099] In this solution, the control module 300 can be configured to automatically power on when used in wired or wireless mode while the device is powered off.

[0100] In this solution, the control module 300 can be configured to display the battery level when the physical button is clicked; to turn off wireless charging when the physical button is double-clicked; and to enter low-current mode when the physical button is pressed and held.

[0101] In this solution, the control module 300 can be configured to automatically shut down if not used for 5 seconds while powered on. The power indicator light is on by default when powered on and off when powered off.

[0102] In this solution, when using wired or wireless, the control module 300 is configured to turn off the wireless function by pressing the power button; when using wired or wireless, the control module 300 can also be configured to control the white power indicator light to indicate the battery level by keeping it constantly lit in 25% increments.

[0103] In this solution, the control module 300 is configured to keep the wireless charging indicator light on when the wireless charging is working normally, and to flash the wireless charging indicator light when there are foreign objects or abnormal temperatures.

[0104] In this solution, the protection module 400 is equipped with functions such as output overcurrent protection, short circuit protection, output overpower protection, high and low temperature protection for charging and discharging, battery overcharge protection, battery over-discharge protection, and undervoltage protection.

[0105] In this solution, the wireless chip 201 is configured with FOD (Foreign Object Detection) function.

[0106] In this solution, the control module 300 can be a multi-protocol fast-charging power bank module. It includes charging / discharging DC-DC circuits, control circuits, and protection circuits. The control module 300 supports CC protocol communication. The protection circuit is configured to implement input overvoltage protection, output overcurrent and short-circuit protection, and overvoltage protection.

[0107] In this solution, a protection module 400 is configured to implement reverse connection protection, battery reverse connection protection, over-temperature protection, charging over-current protection, over-discharge current protection, and short-circuit protection.

[0108] In this solution, the wireless chip 201 automatically identifies the approach of the wireless load by detecting the change in the Q value of the wireless coil 202. After detecting the wireless load, the control module 300 automatically turns on to charge the wireless load.

[0109] In this solution, the power bank automatically identifies devices that support wireless charging via the wireless coil 202. Once the device to be charged is placed on the power bank, charging begins immediately without the need to manually turn on the power button.

[0110] In this solution, the wireless chip 201 is powered by the battery 501. When the power bank is turned off, the Q-value detection function of the wireless chip 201 is not turned off. Other parts of the wireless chip 201 enter a low-power mode. After the wireless chip 201 detects a change in the Q-value, it wakes up other functions.

[0111] In this scheme, the wireless chip 201 is configured to wake up the control module 300 via an I2C signal after detecting a change in the Q value.

[0112] In this solution, the wireless coil 202 is equipped with a magnetic automatic positioning function, eliminating the need for manual coil alignment. The wireless coil 202 uses a magnetically positioned wireless coil, automatically aligning with the coil of the magnetically attached wireless load.

[0113] In this solution, the wireless chip 201 is configured with PRE-FOD detection and PTR-FOD detection functions. For PRE-FOD detection, during the charging initialization phase, potential foreign objects in the coil area are identified through low-power signal scanning. For PTR-FOD detection, during the power transfer phase, FOD is determined based on power loss and a power loss threshold.

[0114] In this solution, when charging is performed via the TYPE-C interface 101, the control module 300 automatically wakes up and powers on to charge, eliminating the need to manually turn on the power button.

[0115] In this solution, the power bank is equipped with a first temperature detection module and a second temperature detection module. The first temperature detection module is equipped with a first thermistor R1, and the second temperature detection module is equipped with a second thermistor R2. The first thermistor R1 is configured for temperature detection of the wireless chip 201, and the second thermistor R2 is configured for temperature detection of the battery 501.

[0116] In this solution, the control module 300 is configured to support a low-current mode. In low-current mode, no light-load detection is performed within 2 hours, allowing charging of low-current devices such as Bluetooth headsets and smartwatches. In low-current mode, the control module 300 forcibly powers on the TYPE-C interface 101 and the wireless chip 201, disables the no-load shutdown function, and automatically exits low-current mode after 2 hours.

[0117] In this solution, under non-low current mode, the configuration control module 300 automatically shuts down after detecting no-load for a period of time, thereby reducing static power consumption.

[0118] In this solution, the control module 300 is configured to detect the output current and protocol signal. If the output current is less than the set value for more than the no-load detection shutdown delay time and there is no protocol signal handshake, the power bank will automatically shut down.

[0119] In this solution, the TYPE-C interface 101 serves as the main wired interface, transmitting power through the power line (VBUSC1) and transmitting protocol information through the protocol signal pins (DPC, DMC), and is connected to the control module 300 (multi-protocol bidirectional fast charging chip).

[0120] The TYPE-C interface 101 supports bidirectional functionality. When an external power source is connected, electrical energy is input to the control module 300 via BVBUSC1 to charge the battery 501 (polymer cell); when a load is connected, the control module 300 outputs electrical energy through BVBUSC1 to power the load.

[0121] The control module 300 can integrate mainstream fast charging protocols such as PD and QC. By parsing the protocol signals of the DPC and DMC pins, it negotiates voltage (such as 5V / 9V / 12V) and current (such as 1A / 2A / 3A) with external devices (power supply or load) to achieve fast charging and discharging.

[0122] In this design, the positive terminal (BAT+) of battery 501 is directly connected to the control module 300, and the negative terminal (BAT-) is connected to the protection module 400. One end of the protection module 400 is grounded (GND), forming a battery charging and discharging circuit. Battery 501 is made of high-capacity polymer material and supports multiple charge and discharge cycles.

[0123] The protection module 400 monitors the voltage and current between BAT+ and BAT- in real time. When overcharging (too high voltage), over-discharging (too low voltage), or overcurrent (abnormal current) is detected, the circuit is immediately cut off to prevent damage to the battery cell.

[0124] In this scheme, the wireless chip 201 is connected to the multi-protocol bidirectional fast charging chip through the power line (VBUSA2) to obtain power; the wireless coil 202 and the resonant capacitor 204 form an LC resonant circuit, and the resonant capacitor matches the coil inductance so that the circuit works at the optimal resonant frequency.

[0125] The control module 300 adjusts the energy output of the wireless coil 202 by controlling the output power of the BVBUSA2. When a load (such as a mobile phone that supports wireless charging) approaches the wireless transmitting coil, the coil generates an alternating magnetic field to achieve contactless power transmission.

[0126] The decoding circuit 203 is connected to the protocol signal path of the TYPE-C interface 101 to parse the encoded signals sent by the external device (such as device type and charging requirements), and transmits the parsing results to the control module 300 through the internal path to assist the chip in adjusting the charging and discharging parameters.

[0127] The first thermistor R1 and the second thermistor R2 are respectively attached to the wireless chip 201 and the battery 501 to detect the operating temperature of the corresponding circuit and the battery temperature in real time. The detection signal is fed back to the control module 300. When the control module 300 detects an abnormal temperature, it triggers protection (such as power reduction or power cut-off).

[0128] In this scheme, the control module 300 is configured to not trigger overheat protection when the maximum power output is reached; and it will not trigger overheat protection when the maximum power input is reached.

[0129] In this design, the wired discharge conversion efficiency of the mobile power supply is over 80%, and the wireless discharge conversion efficiency is over 65%.

[0130] Figure 3 This is another power bank structure block diagram in the embodiment, see reference. Figure 3 Based on any of the aforementioned solutions, in one possible implementation, the power bank includes:

[0131] TYPE-C interface 101, USB-A interface 102, wireless charging module (not shown in the figure), control module 300, protection module 400, decoupling protection circuit 401, battery 501.

[0132] In this design, the TYPE-C interface 101 is equipped with a first ESD protection module 1012, and the TYPE-C interface 101 is connected to the GATE-C pin of the control module 300 through a first power MOSFET 1011. The USB-A interface 102 is equipped with a second ESD protection module 1022, and the USB-A interface 102 is connected to the GATE-A pin of the control module 300 through a second power MOSFET 1021.

[0133] The control module 300 is connected to the battery 501 through the protection module 400, and the decoupling protection circuit 401 is connected to both the control module 300 and the protection module 400.

[0134] The control module 300 is also equipped with a button module 302 and a temperature detection module 301. The button module 302 and the temperature detection module 301 are respectively connected to the control module 300. The control module 300 is also equipped with light-emitting diodes (LED1~LED4).

[0135] In this solution, the control module 300 supports CC protocol communication and is equipped with charging / discharging DC-DC circuits and control circuits. The control module 300 features battery temperature detection, input overvoltage protection, output overcurrent and short-circuit protection, and overvoltage protection functions.

[0136] In this solution, the protection module 400 and the decoupling protection circuit 401 are connected in parallel. By connecting the two in parallel, the overvoltage and overcurrent protection value under abnormal battery conditions can be increased, which can more effectively protect the power bank.

[0137] In this solution, the decoupling protection circuit 401 adopts an RC decoupling circuit, which consists of two decoupling capacitors and a current-limiting resistor. It can effectively stabilize the voltage, make the data collected by the power protection chip more accurate, make the protection more sensitive, and play a certain role in ESD protection.

[0138] In this solution, the temperature detection module 301 can be a 3435NTC module. The 3435NTC module is a battery temperature monitoring module, which mainly plays the role of detecting abnormal temperatures of battery 501. The 3435NTC module transmits the data back to the control module 300 to ensure the overall safety of the power bank.

[0139] In this solution, the control module 300 serves as the main control chip of the power bank, and it can be configured to power on / off via buttons in the button module 302. The control module 300 is configured with low-current mode control function, as well as power protocol control for the TYPE-C interface 101 and the USB-A interface 102.

[0140] In this solution, the low-current mode is mainly used to continuously charge low-power devices such as headphones and watches. This is achieved by pressing and holding the button to give the corresponding instruction to the control module 300. The control module 300 then activates the low-current mode and sends an instruction to the LED to put it into a scrolling light state, indicating to the user that it is now in low-current mode.

[0141] In this solution, the button module 302 is specifically used for single-click to display battery level, double-click to power off, and long-press to enter low-current mode.

[0142] In this solution, the control module 300 is connected to the gate of the first power MOSFET 1011 of the TYPE-C interface 101 via the GATE-C pin, and to the gate of the second power MOSFET 1021 of the USB-A interface 102 via the GATE-A pin. By outputting high and low levels, the control module controls the conduction and cutoff of the MOSFETs, thereby controlling the charging and discharging paths of the two interfaces.

[0143] When the TYPE-C interface is connected to an external power source, the control module 300 controls the GATE-C pin to output a high level, turning on the corresponding power MOS, and the external power source charges the battery 501 through the TYPE-C interface 101; when the USB-A interface 102 is connected to a load, the control module 300 controls the power MOS to turn on through the GATE-A pin, and the battery 501 supplies power to the load through the USB-A interface 102.

[0144] The positive terminal (BAT+) and negative terminal (BAT-) of battery 501 are connected to the system circuit respectively. BAT+ provides power output, and BAT- is connected to the ground terminal (GND) to form a complete charging and discharging circuit.

[0145] In this solution, a first ESD protection element 1012 is configured at the TYPE-C interface 101, and a second ESD protection element 1022 is configured at the USB-A interface 102. When the interface is subjected to electrostatic shock, the ESD element quickly conducts and discharges the electrostatic current to ground, preventing electrostatic damage to the control module 300 and other sensitive components.

[0146] The NTC motor in the temperature detection module 301 is in close contact with the battery 501 or the core circuit, and detects temperature changes in real time, transmitting the temperature signal to the control module 300. When the temperature exceeds the threshold, the control module 300 cuts off the charging and discharging path by turning off the power MOSFET, thus achieving over-temperature protection.

[0147] In this scheme, the full-load discharge casing temperature is set to be above 48℃ but below 60℃, and the over-temperature protection will not be triggered during a full-load discharge cycle.

[0148] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A portable power bank, characterized in that, include: At least one wired charging / discharging interface, a wireless charging module, a control module, a protection module, and an energy storage module; The wired charging and discharging interface and the wireless charging module are respectively connected to the control module, and the protection module is respectively connected to the control module and the energy storage module. The wired charging and discharging interface is used to connect to a load and charge the load through the energy storage module, or to connect to a power source and charge the energy storage module through the power source. The wireless charging module is used to wirelessly connect to the load and wirelessly charge the load through the energy storage module. The control module is configured for charging and discharging control of the mobile power supply; The protection module is configured to provide charging and discharging protection for the energy storage module.

2. The portable power bank as described in claim 1, characterized in that, The wired charging and discharging interfaces include a TYPE-C interface and a USB-A interface.

3. The portable power bank as described in claim 1, characterized in that, The signal pins of the wired charging and discharging interface are equipped with an electrostatic protection module.

4. The portable power bank as described in claim 1, characterized in that, The control pins of the control module are connected to the power pins of the wired charging and discharging interface via a power MOS.

5. The portable power bank as described in claim 1, characterized in that, The wireless charging module includes a wireless chip, and the wireless chip is equipped with a wireless coil. A resonant capacitor is also provided between the wireless coil and the wireless chip; The control module and the wireless chip are configured for controlling wireless charging.

6. The portable power bank as described in claim 5, characterized in that, The wireless coil is equipped with a positioning magnet, which is used for positioning and alignment between the load and the wireless coil.

7. The portable power bank as described in claim 5, characterized in that, The wireless chip is equipped with a first temperature detection module, which is used for temperature detection of the wireless chip.

8. The portable power bank as described in claim 1, characterized in that, The control module is equipped with a second temperature detection module, which is used for temperature detection of the control module.

9. The portable power bank as described in claim 1, characterized in that, The protection module is also equipped with a decoupling protection circuit, which is connected to the control module and the protection module. The decoupling protection circuit is used for signal conditioning and protection of the control module and the protection module.

10. The portable power bank as described in claim 1, characterized in that, The energy storage module includes a battery.

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