Charging and discharging visualized mobile power supply

Abstract

The utility model relates to the technical field of mobile power supplies, and provides a charging and discharging visualized mobile power supply, which is characterized in that a battery sampling module is directly connected in series with the positive electrode of a battery to monitor the inflow current when the battery is charged and the outflow current when the battery is discharged in real time; the remaining time required by full charging of the battery or the remaining time of the battery from under-voltage discharging is accurately calculated based on the remaining capacity of the battery and is displayed through the display module, so that the remaining capacity and the remaining time of charging and discharging are visualized, and a user is assisted in accurately and effectively knowing the use condition of the mobile power supply; the user can reasonably arrange the outdoor use time of the mobile power supply, the endurance anxiety problem of using a mobile phone and the mobile power supply by the user is relieved, and the use experience of the user is improved.

Description

Technical Field

[0001] This utility model relates to the field of mobile power bank technology, and in particular to a mobile power bank with visualized charging and discharging. Background Technology

[0002] With the rapid development and upgrades of smartphones and tablets, their functions have become increasingly powerful and intelligent, leading to a corresponding increase in power consumption. As a result, mobile phone manufacturers have increased battery capacity and charging power to meet the demands of high power consumption. Even with increased battery capacity, it still cannot meet users' needs outdoors or in places where charging is inconvenient. Therefore, portable power banks have emerged, alleviating users' battery anxiety.

[0003] Although there are many types of portable power banks available, they mainly fall into the following four categories:

[0004] The first type has only 2 to 4 LEDs to display the remaining power, resulting in large errors in power display and an inability to display charging / discharging power and remaining time.

[0005] The second type is a digital tube or LCD that displays the remaining battery power but cannot display the charging / discharging power or remaining time.

[0006] The third type is where the digital tube or LCD screen displays the remaining battery power and charging / discharging power, but cannot display the remaining charging / discharging time.

[0007] The fourth type uses a digital tube or LCD screen to display the remaining battery power, charging / discharging power, and remaining charging / discharging time. However, the battery power display has a large error, and the remaining charging / discharging time is not displayed accurately.

[0008] While existing power banks can charge and discharge normally, their functionality is not perfect. They cannot provide users with accurate information about the power bank's usage, nor can they accurately display the remaining battery level and charging / discharging time. As a result, users cannot accurately and effectively understand the power bank's usage status, leading to a poor user experience. Utility Model Content

[0009] This invention provides a mobile power bank with visualized charging and discharging capabilities, solving the technical problem that existing mobile power banks cannot adequately display the remaining battery level and remaining charging / discharging time to users, resulting in a poor user experience.

[0010] To address the above technical problems, this utility model provides a mobile power supply with visualized charging and discharging capabilities, comprising a main controller, a battery sampling module, a display module, an interface sampling module, and at least one power interface; the sampling end of the battery sampling module is connected in series with the positive terminal of the battery, and the feedback end is connected to the main controller; the main controller is connected to the display module and the interface sampling module; the interface sampling module is connected to the power interface.

[0011] This basic solution connects a battery sampling module directly in series with the positive terminal of the battery to monitor the inflow current during charging and the outflow current during discharging in real time. Based on the remaining battery power, it accurately calculates the remaining time required to fully charge the battery or the remaining time before the battery is under-discharged and displays the results. This visualizes the remaining power and the remaining charging / discharging time, helping users to accurately and effectively understand the usage of the power bank. It also helps users to rationally plan the outdoor use of the power bank, alleviate battery anxiety related to mobile phones and power banks, and improve the user experience.

[0012] In a further embodiment, the battery sampling module includes a first resistor R1 and an operational amplifier U1; the first resistor R1 is connected in series with the positive terminal of the battery, one end of which is connected to the positive terminal of the battery, and the other end of which is connected to the non-inverting input terminal of the operational amplifier U1; the inverting input terminal of the operational amplifier U1 is connected between the positive terminal of the battery and the first resistor R1, and its output terminal is connected to the main controller as a feedback terminal.

[0013] This solution connects the first resistor R1 in series with the positive terminal of the battery and uses a resistance sampling method for current sampling. This method has low equipment cost, is easy to implement, and has a simple sampling circuit that will not interfere with the circuit under test. At the same time, since the resistance value of the first resistor R1 is relatively small, the sampled voltage is relatively low. Therefore, an operational amplifier U1 is added to amplify the sampled voltage signal to a voltage range that the main controller can accurately read, thereby reducing the selection cost of the main controller.

[0014] In a further embodiment, the battery sampling module further includes a first filtering component, which includes a second resistor R2, a third resistor R3, and a first capacitor C1; one end of the second resistor R2 is connected to the other end of the first resistor R1, and the other end is connected to the non-inverting input terminal of the operational amplifier U1; one end of the third resistor R3 is connected to the positive terminal of the battery, and the other end is connected to the inverting input terminal of the operational amplifier U1; the two ends of the first capacitor C1 are respectively connected to the non-inverting input terminal and the inverting input terminal of the operational amplifier U1.

[0015] This scheme connects a first filter component in series at the input terminals of the second resistor R2, the third resistor R3, and the first capacitor C1. The input sampling signal is filtered by the RC filter formed by the second resistor R2, the third resistor R3, and the first capacitor C1, which removes high-frequency interference signals from the voltage across the first resistor R1, thereby improving sampling accuracy and circuit stability.

[0016] In a further embodiment, the battery sampling module further includes a second filtering component, which includes a fourth resistor R4 and a second capacitor C2; one end of the fourth resistor R4 is connected to the output terminal of the operational amplifier U1, and the other end is connected to the main controller; one end of the second capacitor C2 is connected between the fourth resistor R4 and the main controller, and the other end is grounded.

[0017] This solution further incorporates an RC filter component at the output of operational amplifier U1. By filtering out high-frequency interference signals at the amplifier output, the output signal is smoothed, reducing signal fluctuations and jitter, thus making the output signal more stable and reliable.

[0018] In a further embodiment, the battery sampling module further includes a voltage divider assembly, which includes a fifth resistor R5, a sixth resistor R6, and a third capacitor C3; one end of the fifth resistor R5 is connected to the power supply terminal, and the other end is connected to the bias voltage input pin ref of the operational amplifier U1; one end of the sixth resistor R6 is connected to the other end of the fifth resistor R5, and the other end is grounded; the third capacitor C3 is connected in parallel with the sixth resistor R6.

[0019] This solution connects a voltage divider consisting of a fifth resistor R5, a sixth resistor R6, and a third capacitor C3 to the bias voltage input pin ref of the operational amplifier U1, providing a bias voltage to the bias voltage input pin ref of the operational amplifier U1. The voltage divider can adjust the resistance values ​​as needed to change the voltage division ratio, thereby meeting the requirements of different circuits.

[0020] In a further implementation, the system also includes a lithium battery protection module, a system power supply module, and a charge / discharge control module. The lithium battery protection module is connected to the battery, the system power supply module, the charge / discharge control module, and the main controller. The charge / discharge control module is connected to the main controller and the power interface. The system power supply module is also connected to the main controller and the display module.

[0021] In a further embodiment, the display module includes a driving module and an LCD display screen, wherein the driving module is connected to the system power supply module, the main controller, and the LCD display screen.

[0022] This solution integrates a lithium battery protection module, a system power supply module, a battery sampling module, a charge / discharge control module, an interface sampling module, and a display module into the power bank. It not only accurately displays the remaining charge / discharge time but also accurately displays the remaining battery power and charge / discharge power. Simultaneously, it displays battery temperature, battery health status, and the number of charge / discharge cycles. It has the practical function of displaying all the key status information of the power bank's operation. The LCD screen displays a wealth of data information, allowing users to accurately understand the usage of the power bank and alleviate users' battery life anxiety.

[0023] In a further embodiment, the interface sampling module includes a voltage detection component and a current detection component;

[0024] The voltage detection component includes a seventh resistor R7, an eighth resistor R8, and a fourth capacitor C4; one end of the seventh resistor R7 is connected to the power supply terminal of the power interface, and the other end is connected to the main controller as a voltage feedback pin and grounded through the eighth resistor R8; the fourth capacitor C4 is connected in parallel with the eighth resistor R8.

[0025] The current detection component includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and a fifth capacitor C5. One end of the tenth resistor R10 is connected to the ground terminal of the power interface and grounded through the ninth resistor R9. The other end serves as a current feedback pin connected to the main controller, connected to the power supply terminal through the eleventh resistor R11, and grounded through the fifth capacitor C5.

[0026] This solution connects voltage and current detection components to the power interface to monitor the input and output power of each USB port in real time, thereby assisting in high-precision charging and discharging control. Attached Figure Description

[0027] Figure 1 This is a hardware circuit diagram of the battery sampling module 2 in a mobile power supply with visualized charging and discharging provided by an embodiment of the present invention.

[0028] Figure 2 This is a partial system framework diagram of a mobile power supply with visualized charging and discharging provided by an embodiment of this utility model;

[0029] Figure 3 This is a hardware circuit diagram of the voltage detection component provided in this embodiment of the utility model;

[0030] Figure 4 This is a hardware circuit diagram of the current detection component provided in this embodiment of the utility model;

[0031] The system includes: main controller 1, battery sampling module 2, drive module 3, LCD display 4, interface sampling module 5, lithium battery protection module 6, system power supply module 7, charge and discharge control module 8, and switch button 9. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below with reference to the accompanying drawings. The embodiments are given for illustrative purposes only and should not be construed as limiting the utility model. The accompanying drawings are for reference and illustration only and do not constitute a limitation on the scope of patent protection of this utility model, because many changes can be made to this utility model without departing from the spirit and scope of this utility model.

[0033] This utility model provides a portable power supply with visualized charging and discharging capabilities, such as... Figure 1 , Figure 2 As shown, in this embodiment, it includes a main controller, a battery sampling module, a display module, an interface sampling module, and at least one power interface; the sampling end of the battery sampling module is connected in series with the positive terminal of the battery, and the feedback end is connected to the main controller; the main controller is connected to the display module and the interface sampling module; the interface sampling module is connected to the power interface.

[0034] At least one of the power interfaces includes a TYPE-C input / output port and a USB-A output port.

[0035] TYPE-C Input / Output Port: TYPE-C is a bidirectional USB port for charging and discharging. It can be used to charge mobile phones, tablets, and other electronic devices, or to charge power banks using a power adapter. Figure 2 The TYPE-C1 input / output port and TYPE-C2 input / output port are included.

[0036] USB-A output port: This can only be used as an output interface to charge electronic devices such as mobile phones and tablets. Figure 2 The USB-A output port.

[0037] In this embodiment, the battery sampling module includes a first resistor R1 and an operational amplifier U1; the first resistor R1 is connected in series with the positive terminal of the battery, one end of which is connected to the positive terminal of the battery, and the other end is connected to the non-inverting input terminal of the operational amplifier U1; the inverting input terminal of the operational amplifier U1 is connected between the positive terminal of the battery and the first resistor R1, and its output terminal is connected to the main controller as a feedback terminal V_SHUNT.

[0038] The first resistor R1 is an ultra-low resistance alloy resistor with a 1mR value and 1% accuracy, which can reduce power loss and heat generation without sacrificing sampling accuracy.

[0039] When the power bank is in input charging mode, the charging current flows from the left end BAT+ of the first resistor R1 through the first resistor R1, through VBAT+, and into the positive terminal of the battery. A positive voltage V_r10 = R10 * I (I is the charging current) is generated across the first resistor R1 and applied to the input pin 4 / 5 of the operational amplifier U1. This positive voltage V_r10 is superimposed on Vref to obtain a charging state V_shunt, which causes V_shunt to be greater than Vref. Therefore, the voltage across the first resistor R1 can be calculated as V_r10 = (V_shunt - Vref) / 50, and the current flowing through the first resistor R1 is I_r10 = V_r10 / R10. This current is the battery charging current I_bat = I_r10.

[0040] When the power bank is in output discharge mode, the discharge current flows from the positive terminal VBAT+ through the first resistor R1 and out from BAT+. A negative voltage V_r10 = R10 * I (I is the discharge current) is generated across the first resistor R1 and applied to the input pin 4 / 5 of the amplifier. This negative voltage V_r10 is superimposed on Vref to obtain a V_shunt in the discharge state, which causes V_shunt to be less than Vref. Therefore, the voltage across the first resistor R1 can be calculated as V_r10 = (Vref - V_shunt) / 50. The current flowing through the first resistor R1 is I_r10 = V_r10 / R10. This current is the battery discharge current I_bat = I_r10.

[0041] By detecting the current in the first resistor R1, the current at the battery terminal I_bat=I_r10 can be obtained, and then the remaining battery capacity can be calculated using the milliampere-second integration method.

[0042] The battery current is accumulated and integrated over a one-second time period. During discharge, the current capacity is subtracted from the discharge current, and the remaining capacity during discharge is calculated as: C_remaining = C_current - I_bat. During charging, the current capacity is added to the charging current, and the remaining capacity during charging is calculated as: C_remaining = C_current + I_bat. The battery charge level is calculated as: SOC = C_remaining / C_fully charged * 100.

[0043] In this embodiment, the first resistor R1 is connected in series with the positive terminal of the battery, and the current is sampled using the resistance sampling method. The equipment is low-cost, easy to implement, and the sampling circuit is simple and will not interfere with the circuit under test. At the same time, since the resistance value of the first resistor R1 is relatively small, the sampled voltage is relatively low. Therefore, an operational amplifier U1 is added to amplify the sampled voltage signal to a voltage range that the main controller can accurately read, thereby reducing the selection cost of the main controller.

[0044] In this embodiment, the battery sampling module further includes a first filtering component, which includes a second resistor R2, a third resistor R3, and a first capacitor C1; one end of the second resistor R2 is connected to the other end of the first resistor R1, and the other end is connected to the non-inverting input terminal of the operational amplifier U1; one end of the third resistor R3 is connected to the positive terminal of the battery, and the other end is connected to the inverting input terminal of the operational amplifier U1; the two ends of the first capacitor C1 are respectively connected to the non-inverting input terminal and the inverting input terminal of the operational amplifier U1.

[0045] In this embodiment, a first filter component is connected in series at the input terminals of the second resistor R2, the third resistor R3, and the first capacitor C1. The input sampling signal is filtered by the RC filter formed by the second resistor R2, the third resistor R3, and the first capacitor C1, thereby filtering out high-frequency interference signals of the voltage across the first resistor R1, thus improving sampling accuracy and circuit stability.

[0046] In this embodiment, the battery sampling module further includes a second filtering component, which includes a fourth resistor R4 and a second capacitor C2; one end of the fourth resistor R4 is connected to the output terminal of the operational amplifier U1, and the other end is connected to the main controller; one end of the second capacitor C2 is connected between the fourth resistor R4 and the main controller, and the other end is grounded.

[0047] In this embodiment, an RC filter component is further provided at the output of the operational amplifier U1 to filter out high-frequency interference signals from the amplifier output, smooth the output signal, reduce signal fluctuations and jitter, and make the output signal more stable and reliable.

[0048] In this embodiment, the battery sampling module further includes a voltage divider component, which includes a fifth resistor R5, a sixth resistor R6, and a third capacitor C3; one end of the fifth resistor R5 is connected to the power supply terminal MCU-VDD, and the other end is connected to the bias voltage input pin ref of the operational amplifier U1; one end of the sixth resistor R6 is connected to the other end of the fifth resistor R5, and the other end is grounded; the third capacitor C3 is connected in parallel with the sixth resistor R6.

[0049] The fifth resistor R5 and the sixth resistor R6 form a voltage divider circuit to provide a bias voltage V_ref to pin 1 of the operational amplifier U1. When the power bank is in an idle state, there is no current in the first resistor R1, the power bank is in an idle state, and the output voltage of the operational amplifier U1 is equal to the bias voltage, i.e., V_idle = V_shunt = V_ref.

[0050] In this embodiment, a voltage divider component consisting of a fifth resistor R5, a sixth resistor R6, and a third capacitor C3 is connected to the bias voltage input pin ref of the operational amplifier U1 to provide a bias voltage to the bias voltage input pin ref of the operational amplifier U1. The voltage divider component can adjust the resistance value as needed to change the voltage division ratio, thereby meeting the requirements of different circuits.

[0051] In this embodiment, a lithium battery protection module, a system power supply module, and a charge / discharge control module are also included. The lithium battery protection module is connected to the battery, the system power supply module, the charge / discharge control module, and the main controller. The charge / discharge control module is connected to the main controller and the power interface. The system power supply module is also connected to the main controller and the display module.

[0052] In this embodiment, the display module includes a driver module and an LCD display screen. The driver module is connected to the system power supply module, the main controller, and the LCD display screen.

[0053] This embodiment integrates a lithium battery protection module, a system power supply module, a battery sampling module, a charge / discharge control module, an interface sampling module, and a display module into the power bank. It not only accurately displays the remaining charge / discharge time, but also accurately displays the remaining battery power and charge / discharge power. At the same time, it displays the battery temperature, battery health status, and battery charge / discharge cycle count. It has the practical function of displaying all the key status information of the power bank's operation. The LCD screen displays a wealth of data information, allowing users to accurately understand the usage of the power bank and alleviate users' battery life anxiety.

[0054] In this embodiment, the interface sampling module includes a voltage detection component and a current detection component;

[0055] See Figure 3 The voltage detection component includes a seventh resistor R7, an eighth resistor R8, and a fourth capacitor C4; one end of the seventh resistor R7 is connected to the power supply terminal VBUS of the power interface, and the other end serves as the voltage feedback pin ADC_VBUS, which is connected to the main controller and grounded through the eighth resistor R8; the fourth capacitor C4 is connected in parallel with the eighth resistor R8.

[0056] See Figure 4 The current detection component includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and a fifth capacitor C5. One end of the tenth resistor R10 is connected to the ground terminal of the power interface and grounded through the ninth resistor R9. The other end serves as the current feedback pin ADC_I and is connected to the main controller. It is also connected to the power supply terminal MCU-VDD through the eleventh resistor R11 and grounded through the fifth capacitor C5.

[0057] In this embodiment, a voltage detection component and a current detection component are connected to the power interface to monitor the input and output power of each USB port in real time, so as to assist in high-precision charging and discharging control.

[0058] In other embodiments, if it is necessary to detect the battery voltage as required, a module with the same structure as the voltage detection component can be set up to detect the battery voltage.

[0059] This utility model also includes a switch button, which is connected to the main controller. Pressing the switch button triggers the main controller to turn on or off.

[0060] in:

[0061] Lithium battery protection module: Used to manage and protect the battery. The battery protection module obtains the battery's operating status, including parameters such as voltage, current, and temperature, and thus provides functions such as overvoltage protection, undervoltage protection (over-discharge), overcurrent protection, high temperature protection, low temperature protection, and short circuit protection to ensure the safe operation of the power bank under various working conditions.

[0062] System power supply module: The system power supply module provides the required operating voltage for each functional module of the system.

[0063] The main controller, taking an MCU control system as an example: The microcontroller, or MCU for short, is responsible for detecting system inputs and controlling outputs, and is the core control unit of the entire power bank product. The main functions of the MCU control system are to detect the charging and discharging current and voltage of the power interface (input / output port), calculate the charging and discharging power, and display it on the LCD screen. The MCU control system also detects the battery terminal current during charging and discharging, accurately calculates the remaining battery capacity and remaining time using a smoothing filtering algorithm and a milliampere-second integration algorithm, and displays this information on the LCD screen. It also calculates the battery health index by accumulating the number of battery charge and discharge cycles.

[0064] Power button: Responsible for detecting the input commands from the power button, and detecting the user's power on / off commands.

[0065] Driver module: Provides the required operating voltage and control signals for the LCD display.

[0066] LCD display screen: Displays the working status of the power bank, mainly including charging and discharging power, remaining charging and discharging time, battery level, battery health status, battery charge and discharge cycle count, battery temperature, and power bank abnormal alarm information.

[0067] The charge / discharge control module is used to control the charging input and discharging output of the power bank, such as a multi-protocol charge / discharge buck-boost control circuit that includes a buck-boost power module.

[0068] The interface sampling module is used to sample the current and voltage when the power is disconnected.

[0069] This invention connects a battery sampling module directly in series with the positive terminal of the battery to monitor the inflow current during charging and the outflow current during discharging in real time. Based on the remaining battery power, it accurately calculates the remaining time required to fully charge the battery or the remaining time before the battery is undercharged and displays this information through a display module. This visualizes the remaining power and the remaining charging / discharging time, helping users to accurately and effectively understand the usage of the power bank. It also helps users to rationally plan the outdoor use of the power bank, alleviate battery anxiety associated with using mobile phones and power banks, and improve the user experience.

[0070] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A portable power bank with visualized charging and discharging, characterized in that: It includes a main controller, a battery sampling module, a display module, an interface sampling module, and at least one power interface; the sampling end of the battery sampling module is connected in series with the positive terminal of the battery, and the feedback end is connected to the main controller; the main controller is connected to the display module and the interface sampling module; the interface sampling module is connected to the power interface. The battery sampling module includes a first resistor R1 and an operational amplifier U1. The first resistor R1 is connected in series with the positive terminal of the battery, with one end connected to the positive terminal of the battery and the other end connected to the non-inverting input terminal of the operational amplifier U1. The inverting input terminal of the operational amplifier U1 is connected between the positive terminal of the battery and the first resistor R1, and its output terminal is connected to the main controller as a feedback terminal.

2. The mobile power supply with visualized charging and discharging as described in claim 1, characterized in that: The battery sampling module further includes a first filtering component, which includes a second resistor R2, a third resistor R3, and a first capacitor C1. One end of the second resistor R2 is connected to the other end of the first resistor R1, and the other end is connected to the non-inverting input terminal of the operational amplifier U1. One end of the third resistor R3 is connected to the positive terminal of the battery, and the other end is connected to the inverting input terminal of the operational amplifier U1. The two ends of the first capacitor C1 are connected to the non-inverting input terminal and the inverting input terminal of the operational amplifier U1, respectively.

3. The mobile power bank with visualized charging and discharging as described in claim 1, characterized in that: The battery sampling module further includes a second filtering component, which includes a fourth resistor R4 and a second capacitor C2; one end of the fourth resistor R4 is connected to the output terminal of the operational amplifier U1, and the other end is connected to the main controller; one end of the second capacitor C2 is connected between the fourth resistor R4 and the main controller, and the other end is grounded.

4. A mobile power bank with visualized charging and discharging as described in claim 3, characterized in that: The battery sampling module also includes a voltage divider component, which includes a fifth resistor R5, a sixth resistor R6, and a third capacitor C3; one end of the fifth resistor R5 is connected to the power supply terminal, and the other end is connected to the bias voltage input pin ref of the operational amplifier U1; one end of the sixth resistor R6 is connected to the other end of the fifth resistor R5, and the other end is grounded; the third capacitor C3 is connected in parallel with the sixth resistor R6.

5. A mobile power bank with visualized charging and discharging as described in claim 1, characterized in that: It also includes a lithium battery protection module, a system power supply module, and a charge / discharge control module. The lithium battery protection module is connected to the battery, the system power supply module, the charge / discharge control module, and the main controller. The charge / discharge control module is connected to the main controller and the power interface. The system power supply module is also connected to the main controller and the display module.

6. A mobile power supply with visualized charging and discharging as described in claim 5, characterized in that: The display module includes a driver module and an LCD display screen. The driver module is connected to the system power supply module, the main controller, and the LCD display screen.

7. A mobile power supply with visualized charging and discharging as described in claim 3, characterized in that: The interface sampling module includes a voltage detection component and a current detection component; The voltage detection component includes a seventh resistor R7, an eighth resistor R8, and a fourth capacitor C4; one end of the seventh resistor R7 is connected to the power supply terminal of the power interface, and the other end is connected to the main controller as a voltage feedback pin and grounded through the eighth resistor R8; the fourth capacitor C4 is connected in parallel with the eighth resistor R8. The current detection component includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and a fifth capacitor C5. One end of the tenth resistor R10 is connected to the ground terminal of the power interface and grounded through the ninth resistor R9. The other end serves as a current feedback pin connected to the main controller, connected to the power supply terminal through the eleventh resistor R11, and grounded through the fifth capacitor C5.

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