A power bank control circuit applied to a flashlight

Abstract

The utility model discloses a kind of power bank control circuit applied to flashlight, including battery management chip U2, battery B1 and connecting terminal, connecting terminal is connected with field effect tube Q1 by filter module, filter module, field effect tube Q1 are connected with battery management chip U2 respectively, field effect tube Q1 is connected with current detection module, the current detection module is connected with battery management chip U2, battery management chip U2 is connected with lifting module, battery is connected with battery management chip U2 by battery detection module, battery management chip U12 is connected with NTC, battery management chip U2 is connected with indicating lamp RED by resistance R16 and indicating lamp GREEN by resistance R17, battery management chip U2 is connected with sampling module, battery B1 is connected with control circuit module.The utility model is stable in performance, can provide lighting and charging function.

Description

Technical Field

[0001] This utility model relates to a flashlight, specifically a power bank control circuit for a flashlight. Background Technology

[0002] Flashlights, as a common small lighting tool, are widely used in daily life. Traditional flashlights use individual batteries of different models, providing only illumination and lacking other functions. As people's needs increase, flashlights with only illumination function are increasingly unable to meet their requirements. Therefore, a rechargeable battery has been added to flashlights to enable charging and discharging, allowing them to function as both a light source and a power bank, providing charging for mobile devices such as smartphones. However, existing flashlights with this power bank function are prone to unstable charging voltage and lack charging / discharging indicators. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a power bank control circuit for use in flashlights.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A power bank control circuit for a flashlight includes a battery management chip U2, a battery B1, and connection terminals. The connection terminals are connected to a field-effect transistor Q1 via a filter module. The filter module and the field-effect transistor Q1 are both connected to the battery management chip U2. The field-effect transistor Q1 is connected to a current detection module, which is connected to the battery management chip U2. The battery management chip U2 is connected to a lifting module. The battery is connected to the battery management chip U2 via a battery detection module. The battery management chip U2 is connected to an NTC device. The battery management chip U2 is connected to an indicator light RED via a resistor R16 and an indicator light GREEN via a resistor R17. The battery management chip U2 is connected to a sampling module. The battery B1 is connected to a control circuit module.

[0006] As a further improvement, the current detection module includes resistors R2 and R3 and capacitor C5, the filtering module includes capacitor C1 and resistor R1 connected in parallel, the field-effect transistor Q1 is connected to resistor R2 through capacitors C2, C3 and C4 connected in parallel, one end of resistor R2 is connected to capacitor C5, the other end of resistor R2 is connected to resistor R3, resistor R3 is connected to battery management chip U2, and resistors R2, R3 and capacitor C5 are respectively connected to battery management chip U2.

[0007] As a further improvement, the lifting module includes a magnetic bead L1, a capacitor C1 and a capacitor C8. A capacitor C7 is connected to one end of the magnetic bead L1 and connected to the battery management chip U2. A capacitor C8 is connected to the other end of the magnetic bead L1 and connected to the battery management chip U2. One end of the magnetic bead L1 is grounded through a resistor R4 and a capacitor C6, and the other end of the magnetic bead L1 is grounded through a resistor R5 and a capacitor C9.

[0008] As a further improvement, the battery detection module includes resistors R6 and R7 and capacitor C14. Battery B1 is connected to resistors R7 and C14 through capacitors C10, C11 and C12 connected in parallel. The two ends of resistor R7 are connected to resistor R6 and capacitor C14 respectively. Resistor R6 is connected to capacitor C14 and then to battery management chip U2. Capacitor C14 is connected to management chip U2.

[0009] As a further improvement, the sampling module includes resistor R8, resistor R9 and capacitor C13. Resistor R8 and resistor R9 are connected in series and grounded, capacitor C13 is connected in parallel across resistor R9, and resistor R8 is connected to the connection terminal.

[0010] As a further improvement, the control circuit module includes a processor U1 and an OLED module. The processor U1 is connected to the battery B1 via a voltage regulator U3, an inductor L2, and a diode D1 connected in sequence. The diode D1 is connected to capacitors C20 and C21, which are connected in parallel and grounded. Capacitors C22 and C23 are connected to both ends of the voltage regulator U3. The diode D1 is connected to a battery charging detection module, which is connected to the processor U1. The processor U1 is connected to the OLED module and the LED lights.

[0011] As a further improvement, the battery charging detection module includes resistors R14 and R15 and capacitor C18. One end of resistor R14 is connected to diode D1, and the other end of resistor R14 is connected to resistor R15. Resistor R15 is connected to processor U1. Capacitor C18 is connected in parallel across resistor R15. Resistor R15 and capacitor C18 are grounded.

[0012] As a further improvement, the LED lamp includes a first LED lamp and a second LED lamp. The first LED lamp is connected to the processor U1 through field-effect transistors Q2, Q3 and Q4 connected in parallel. The second LED lamp is connected to field-effect transistors Q6 and Q7 connected in parallel. Field-effect transistors Q6 and Q7 are connected to the processor U1 through resistors R19 and R24.

[0013] This utility model has the following beneficial technical effects:

[0014] It can detect charging of mobile phones and other devices in real time, has stable performance, and can also be charged by an external power source. Different indicator lights make it easy to check the charging and discharging status. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the circuit principle of the battery charging part of this utility model;

[0016] Figure 2 This is a schematic diagram of the circuit principle of the control circuit module in this utility model. Detailed Implementation

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of this invention, it should be understood that if terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0020] like Figure 1 and 2As shown, a power bank control circuit for a flashlight includes a battery management chip U2, a battery B1, and connection terminals. The connection terminals are connected to a field-effect transistor Q1 via a filter module. The filter module and the field-effect transistor Q1 are both connected to the battery management chip U2. The field-effect transistor Q1 is connected to a current detection module, which is also connected to the battery management chip U2. The battery management chip U2 is connected to a lifting module. The battery is connected to the battery management chip U2 via a battery detection module. The battery management chip U2 is connected to an NTC circuit. The battery management chip U2 is connected to an indicator light RED via resistor R16 and to an indicator light GREEN via resistor R17. The battery management chip U2 is also connected to a sampling module. The battery B1 is connected to a control circuit module. The connection terminal is a Type C terminal. When an external power source is connected, the battery B1 can be charged, and the battery management chip U2 manages the charging process.

[0021] The current detection module includes resistors R2 and R3 and capacitor C5. The filtering module includes capacitor C1 and resistor R1 connected in parallel. The field-effect transistor Q1 is connected to resistor R2 through capacitors C2, C3, and C4 in parallel. One end of resistor R2 is connected to capacitor C5, and the other end is connected to resistor R3. Resistor R3 is connected to the battery management chip U2. Resistors R2, R3, and C5 are also connected to the battery management chip U2. The current detection module can detect the current passing through it, specifically the current during charging or discharging. Capacitor C1 and resistor R1 act as filters, detected by the corresponding pins of the battery management chip U2. The battery management chip controls the on / off state of the field-effect transistor Q1, thereby controlling the charging and discharging process. Capacitors C2, C3, and C4 further enhance the filtering effect.

[0022] The lifting module includes a ferrite bead L1, capacitor C1, and capacitor C8. Capacitor C7 is connected to one end of ferrite bead L1 and also to the battery management chip U2. Capacitor C8 is connected to the other end of ferrite bead L1 and also to the battery management chip U2. One end of ferrite bead L1 is grounded through resistor R4 and capacitor C6, and the other end is grounded through resistor R5 and capacitor C9. The lifting module regulates the voltage, ensuring circuit stability.

[0023] The battery detection module includes resistors R6 and R7, and capacitor C14. Battery B1 is connected to resistors R7 and C14 via capacitors C10, C11, and C12 connected in parallel. Resistor R7 is connected to resistors R6 and C14 respectively. Resistor R6 is connected to capacitor C14 and then to the battery management chip U2. Capacitor C14 is also connected to the management chip U2. By connecting to battery B1 via resistor R7, data from battery B1 can be detected, and the battery management chip U2 performs corresponding control based on the detection results. Capacitors C10, C11, and C12 act as filters.

[0024] The sampling module includes resistors R8 and R9, and capacitor C13. Resistors R8 and R9 are connected in series and grounded, and capacitor C13 is connected in parallel across resistor R9. Resistor R8 is connected to the connection terminal. The battery management chip U2 uses the sampling module to detect and sample the current and voltage during the charging of battery BA1.

[0025] In addition, the battery management chip U2 can be connected to resistors R10 and R11 through different pins to connect batteries in series and form different numbers of batteries; the maximum power can be set by connecting resistor R12, and NTC detection can be performed by connecting resistor R13 to identify the charging and discharging temperature.

[0026] The battery management chip connects to a RED LED via a resistor and to a GREEN LED via a resistor R17 to indicate charging status.

[0027] The control circuit module includes a processor U1 and an OLED module. The processor U1 is connected to the battery B1 via a voltage regulator U3, an inductor L2, and a diode D1 connected in sequence. Diode D1 is connected to capacitors C20 and C21, which are connected in parallel and grounded. Capacitors C22 and C23 are connected across the voltage regulator U3. Diode D1 is connected to a battery charging detection module, which is connected to the processor U1. The processor U1 is connected to the OLED module and the LED lights. Capacitors C20 and C21 act as filters.

[0028] The battery charging detection module includes resistors R14 and R15 and capacitor C18. One end of resistor R14 is connected to diode D1, and the other end of resistor R14 is connected to resistor R15. Resistor R15 is connected to processor U1. Capacitor C18 is connected in parallel across resistor R15. Resistor R15 and capacitor C18 are grounded.

[0029] The LED lamp includes a first LED lamp and a second LED lamp. The first LED lamp is connected to the processor U1 through field-effect transistors Q2, Q3 and Q4 connected in parallel. The second LED lamp is connected to field-effect transistors Q6 and Q7 connected in parallel. Field-effect transistors Q6 and Q7 are connected to the processor U1 through resistors R19 and R24.

[0030] Battery BA1 is forward-biased via diode D1, and a stable 3.3V output is achieved through a voltage regulator, providing a stable power supply to processor U1. A battery charging detection module effectively detects the battery. Through internal calculations, processor U1 drives the OLED module to display the operating time status. Processor U1 is connected to switch S1. When switch S1 is pressed, processor U1 performs a detection, controlling the brightness of the second LED through MOSFETs Q6 and Q7 to achieve different status indications; and controlling the display status of the first LED through MOSFETs Q2, Q3, and Q4 to achieve different operating modes. Processor U1 is connected to terminal J, whose output voltage is detected by processor U1. Terminal J can also be a photosensor to detect environmental changes.

[0031] It should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power bank control circuit applied to a flashlight, characterized in that, The system includes a battery management chip U2, a battery B1, and connection terminals. The connection terminals are connected to a field-effect transistor Q1 via a filter module. The filter module and the field-effect transistor Q1 are both connected to the battery management chip U2. The field-effect transistor Q1 is connected to a current detection module, which is connected to the battery management chip U2. The battery management chip U2 is connected to a lift-up module. The battery is connected to the battery management chip U2 via a battery detection module. The battery management chip U12 is connected to an NTC. The battery management chip U2 is connected to an indicator light RED via resistor R16 and an indicator light GREEN via resistor R17. The battery management chip U2 is connected to a sampling module. The battery B1 is connected to a control circuit module.

2. The power bank control circuit applied to a flashlight according to claim 1, wherein, The current detection module includes resistors R2 and R3 and capacitor C5. The filtering module includes capacitor C1 and resistor R1 connected in parallel. The field-effect transistor Q1 is connected to resistor R2 through capacitors C2, C3 and C4 connected in parallel. One end of resistor R2 is connected to capacitor C5, and the other end of resistor R2 is connected to resistor R3. Resistor R3 is connected to battery management chip U2. Resistor R2, resistor R3 and capacitor C5 are respectively connected to battery management chip U2.

3. The power bank control circuit applied to a flashlight of claim 2, wherein, The lifting module includes a magnetic bead L1, a capacitor C1 and a capacitor C8. A capacitor C7 is connected to one end of the magnetic bead L1 and connected to the battery management chip U2. A capacitor C8 is connected to the other end of the magnetic bead L1 and connected to the battery management chip U2. One end of the magnetic bead L1 is grounded through a resistor R4 and a capacitor C6, and the other end of the magnetic bead L1 is grounded through a resistor R5 and a capacitor C9.

4. The power bank control circuit applied to a flashlight of claim 3, wherein, The battery detection module includes resistors R6 and R7 and capacitor C14. Battery B1 is connected to resistors R7 and C14 through capacitors C10, C11 and C12 connected in parallel. The two ends of resistor R7 are connected to resistor R6 and capacitor C14 respectively. Resistor R6 is connected to capacitor C14 and then to battery management chip U2. Capacitor C14 is connected to management chip U2.

5. The power bank control circuit for a flashlight of claim 4, wherein, The sampling module includes resistors R8 and R9 and capacitor C13. Resistors R8 and R9 are connected in series and grounded, capacitor C13 is connected in parallel across resistor R9, and resistor R8 is connected to the connection terminal.

6. The power bank control circuit for a flashlight of claim 5, wherein, The control circuit module includes a processor U1 and an OLED module. The processor U1 is connected to the battery B1 via a voltage regulator U3, an inductor L2, and a diode D1 connected in sequence. The diode D1 is connected to capacitors C20 and C21, which are connected in parallel and grounded. Capacitors C22 and C23 are connected to both ends of the voltage regulator U3. The diode D1 is connected to a battery charging detection module, which is connected to the processor U1. The processor U1 is connected to the OLED module and the LED lights.

7. The power bank control circuit for a flashlight of claim 6, wherein, The battery charging detection module includes resistors R14 and R15 and capacitor C18. One end of resistor R14 is connected to diode D1, and the other end of resistor R14 is connected to resistor R15. Resistor R15 is connected to processor U1. Capacitor C18 is connected in parallel across resistor R15. Resistor R15 and capacitor C18 are grounded.

8. The power bank control circuit for a flashlight of claim 7, wherein, The LED lamp includes a first LED lamp and a second LED lamp. The first LED lamp is connected to the processor U1 through field-effect transistors Q2, Q3 and Q4 connected in parallel. The second LED lamp is connected to field-effect transistors Q6 and Q7 connected in parallel. Field-effect transistors Q6 and Q7 are connected to the processor U1 through resistors R19 and R24.

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