Quick-charging battery high-voltage protection circuit

Abstract

The utility model discloses a fast charging battery high voltage protection circuit, which comprises a control chip, the model of the control chip is TP5410, the fast charging battery high voltage protection circuit also comprises a power supply input end VIN, the power supply input end VIN is coupled with the control chip, the power supply input end VIN is electrically connected with a resistor R1 and a diode D1, the resistor R1 is electrically connected with a VCC pin of the control chip, and the diode D1 is electrically connected with the VCC pin of the control chip. The control chip is coupled with the charging indicating lamp, the control chip is coupled with the rechargeable battery BAT through the protection circuit, a BAT pin of the control chip is electrically connected with a capacitor C5, a capacitor C6 and a capacitor C7 which are connected in parallel, and the other ends of the rechargeable battery BAT, the capacitor C5, the capacitor C6, the capacitor C7 and the rechargeable battery BAT are grounded. Through the intelligent management of the TP5410 control chip, the rapid charging function of the battery is realized, and the built-in protection mechanism can effectively monitor and control the charging process, prevent overvoltage and overcurrent conditions, protect the battery from being damaged, and prolong the service life of the battery.

Description

Technical Field

[0001] The utility model relates to the field of circuits, and particularly to a high-voltage protection circuit for a fast-charging battery. Background Art

[0002] With the popularization of mobile electronic devices and the continuous progress of battery technology, fast charging has become an important feature of modern intelligent devices, aiming to shorten the time for users to wait for the device to charge and improve the convenience of life and work. However, the development of fast charging technology is accompanied by a series of challenges, including how to maintain the health and safety of the battery while ensuring charging efficiency, and how to precisely control the charging process to meet the needs of different battery types and capacities.

[0003] Traditional charging methods often lack efficient power management mechanisms and battery protection functions, which easily lead to problems such as battery overheating, overcharging, and over-discharging, thereby affecting battery life and device safety. In addition, the invisibility of the charging state makes it difficult for users to accurately judge the charging process and affects the user experience. Summary of the Utility Model

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A high-voltage protection circuit for a fast-charging battery includes a control chip, the model of the control chip is TP5410, and also includes a power input terminal VIN, the power input terminal VIN is coupled to the control chip, the power input terminal VIN is electrically connected to a resistor R1 and a diode D1, the resistor R1 is electrically connected to the VCC pin of the control chip, the control chip is coupled to a charging indicator light, the control chip is coupled to a charging battery BAT through a protection circuit, the BAT pin of the control chip is electrically connected to a parallel connection of a capacitor C5, a capacitor C6, a capacitor C7, and the charging battery BAT, and the other ends of the capacitor C5, the capacitor C6, the capacitor C7, and the charging battery BAT are grounded.

[0006] Further, the resistor R1 is electrically connected to a resistor R2 and a capacitor C1, and the capacitor C1 is grounded.

[0007] Further, the resistor R2 is electrically connected to two light-emitting diodes respectively, the two light-emitting diodes are a red LED and a green LED respectively, the red LED is electrically connected to the CHRG pin of the control chip, and the green LED is electrically connected to the STDBY pin of the control chip.

[0008] Further, the diode D1 is electrically connected to the VOUT pin of the control chip, the VOUT pin of the control chip is electrically connected to a parallel connection of a capacitor C2, a capacitor C3, and a capacitor C4 and then electrically connected to the output terminal, and the other ends of the capacitor C2, the capacitor C3, and the capacitor C4 are grounded respectively.

[0009] Further, the VOUT pin of the control chip is also electrically connected to a diode D2. The diode D2 is electrically connected to the LX pin of the control chip, and the LX pin of the control chip is also electrically connected to a resistor R3.

[0010] Further, the resistor R3 is electrically connected to the BAT pin of the control chip, and the PROG pin of the control chip is grounded after being electrically connected to a resistor R4.

[0011] Working principle: The power input terminal VIN of this application is electrically connected to a resistor R1 and a diode D1. The resistor R1 helps to limit the current, while the diode D1 plays a rectifying role to ensure that the current can only flow unidirectionally. The resistor R1 is connected to the VCC pin of the control chip to provide it with operating voltage. At the same time, a resistor R2 and a capacitor C1 are also connected to the VCC pin. The resistor R2 is used to regulate the current, while the capacitor C1 is used to store charge to help maintain a stable power supply. The red LED and the green LED are respectively connected to different pins of the control chip to indicate the charging status. The red LED (CHRG pin) indicates that charging is in progress, while the green LED (STDBY pin) indicates that charging has been completed or is in the standby state. The VOUT pin of the control chip is connected to three capacitors (C2, C3, C4) in parallel. These capacitors work together to filter out fluctuations in the output voltage, thus providing a smoother power supply. The diode D2 is connected to the LX pin of the control chip to prevent reverse current flow. In addition, there is a resistor R3 connected to the BAT pin of the control chip, which is used to monitor the battery voltage and disconnect the battery connection when necessary. The BAT pin of the control chip is connected to four components in parallel - three capacitors (C5, C6, C7) and the rechargeable battery BAT. These capacitors are used to stabilize the battery voltage, and the battery itself receives the charging current from the control chip.

[0012] The PROG pin of the control chip is connected to a resistor R4 and then grounded. This resistor is used to adjust the charging speed by changing the resistance value to change the magnitude of the current flowing into the battery.

[0013] The circuit uses a TP5410 control chip to achieve fast charging of the battery and provides necessary protection mechanisms to prevent overheating and high voltage. Through different LED indicators, users can understand the current charging status.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] Efficient and fast charging and safety protection: Through the intelligent management of the TP5410 control chip, the fast charging function of the battery is realized. At the same time, the built-in protection mechanism can effectively monitor and control the charging process, prevent overvoltage and overcurrent situations, protect the battery from damage, and extend the service life of the battery.

[0016] Clear charging status indication: The charging status is intuitively displayed by using a red LED and a green LED. The red LED indicates that charging is in progress, and the green LED indicates that charging is completed or in standby status, which facilitates users to keep track of the charging process at any time and enhances the user experience.

[0017] Voltage stability and filtering effect: In the circuit design, the reasonable layout of capacitors C1 to C7 can not only stably control the operating voltage of the chip, but also effectively filter out the ripple in the output voltage through capacitors C2 to C4 connected in parallel to the VOUT pin, ensuring the smoothness and stability of the charging current, reducing electromagnetic interference, and improving the charging efficiency and battery charging quality.

[0018] Flexible charging rate adjustment: By connecting a resistor R4 to the PROG pin, the charging rate can be adjusted according to actual needs. This design increases the flexibility and adaptability of the circuit. Users can optimize the charging time or adapt to different types of batteries by simply changing the resistor value to meet diverse charging requirements.

[0019] Hardware protection design: The use of diode D1 ensures the unidirectional flow of current and prevents reverse current from damaging the battery and the circuit; diode D2 further enhances the system's protection against reverse current. Cooperating with the monitoring of the battery voltage by resistor R3, a comprehensive hardware protection system is formed, improving the reliability and safety of the entire system. Description of the Drawings

[0020] Figure 1 is the circuit connection block diagram of the present application; Detailed Embodiment

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] A high-voltage protection circuit for a fast-charging battery provided by the present utility model, as Figure 1As shown, it includes a control chip, the model of the control chip is TP5410, and also includes a power input terminal VIN. The power input terminal VIN is electrically connected to a resistor R1 and a diode D1. The resistor R1 is electrically connected to the VCC pin of the control chip. The resistor R1 is electrically connected to a resistor R2 and a capacitor C1. The resistor R2 is respectively electrically connected to two light-emitting diodes, and the two light-emitting diodes are a red LED and a green LED respectively. The red LED is electrically connected to the CHRG pin of the control chip, and the green LED is electrically connected to the STDBY pin of the control chip. The capacitor C1 is grounded. The diode D1 is electrically connected to the VOUT pin of the control chip. The VOUT pin of the control chip is electrically connected to the output terminal after being connected in parallel with a capacitor C2, a capacitor C3, and a capacitor C4. The other ends of the capacitor C2, the capacitor C3, and the capacitor C4 are respectively grounded. The VOUT pin of the control chip is also electrically connected to a diode D2. The diode D2 is electrically connected to the LX pin of the control chip. The LX pin of the control chip is also electrically connected to a resistor R3. The resistor R3 is electrically connected to the BAT pin of the control chip. The BAT pin of the control chip is electrically connected to a capacitor C5, a capacitor C6, a capacitor C7, and a rechargeable battery BAT connected in parallel. The other ends of the capacitor C5, the capacitor C6, the capacitor C7, and the rechargeable battery BAT are grounded. The PROG pin of the control chip is electrically connected to a resistor R4 and then grounded.

[0023] The power input terminal VIN of the present application is electrically connected to the resistor R1 and the diode D1. The resistor R1 helps to limit the current, while the diode D1 plays a rectifying role to ensure that the current can only flow in one direction. The resistor R1 is connected to the VCC pin of the control chip to provide the operating voltage for it. At the same time, the resistor R2 and the capacitor C1 are also connected to the VCC pin. The resistor R2 is used to adjust the current, while the capacitor C1 is used to store charge to help maintain a stable power supply. The red LED and the green LED are respectively connected to different pins of the control chip to display the charging status. The red LED (CHRG pin) indicates that charging is in progress, while the green LED (STDBY pin) indicates that charging has been completed or is in the standby state. The VOUT pin of the control chip is connected to three capacitors (C2, C3, C4) connected in parallel. These capacitors work together to filter out the fluctuations in the output voltage, thereby providing a smoother power supply. The diode D2 is connected to the LX pin of the control chip to prevent reverse current flow. In addition, there is a resistor R3 connected to the BAT pin of the control chip, which is used to monitor the battery voltage and disconnect the battery connection when necessary. The BAT pin of the control chip is connected to four components connected in parallel - three capacitors (C5, C6, C7) and the rechargeable battery BAT. These capacitors are used to stabilize the battery voltage, and the battery itself receives the charging current from the control chip.

[0024] The PROG pin of the control chip is connected to a resistor R4 and then grounded. This resistor is used to adjust the charging speed by changing the resistance value to change the magnitude of the current flowing into the battery.

[0025] The circuit uses a TP5410 control chip to achieve fast charging of the battery and provides necessary protection mechanisms to prevent overheating and high voltage. Through different LED indicators, users can understand the current charging status.

[0026] In a specific embodiment, this embodiment provides a specific implementation of a fast charging battery high voltage protection circuit. In this embodiment, specific parameter values are set for each capacitor and resistor in the circuit to ensure that the circuit can work as expected and achieve efficient and safe fast charging functions.

[0027] First, the power input terminal VIN is connected to the circuit through a resistor R1 with a resistance value of 10 ohms and a diode D1. The resistor R1 is used to limit the magnitude of the input current and prevent excessive current from damaging the circuit. The diode D1 plays a rectifying role to ensure that the current can only flow unidirectionally and enter the circuit for subsequent processing.

[0028] The other end of the resistor R1 is connected to the VCC pin of the control chip TP5410 to provide a stable working voltage for it. At the same time, a resistor R2 with a resistance value of 5 ohms and a capacitor C1 are also connected to the VCC pin. The resistor R2 is used to further adjust the current, and the capacitor C1 is used to store charges to help maintain a stable power supply.

[0029] In terms of charging status display, the red LED and the green LED are respectively connected to different pins of the control chip. The red LED is connected to the CHRG pin to indicate that charging is in progress; the green LED is connected to the STDBY pin to indicate that charging has been completed or is in the standby state. In this way, users can intuitively understand the charging situation of the battery by observing the on and off states of the LEDs.

[0030] The VOUT pin of the control chip is connected to three parallel capacitors - C2, C3, and C4. The capacitance values of these capacitors are 10uF, 20uF, and 10uF respectively. They work together to filter out the fluctuations in the output voltage to ensure the smoothness and stability of the charging current. In this way, electromagnetic interference can be reduced, and the charging efficiency and battery charging quality can be improved.

[0031] In addition, in order to prevent reverse current from damaging the circuit, a diode D2 is connected between the VOUT pin and the LX pin. When the current attempts to flow reversely, the diode D2 will block it and protect the circuit from damage.

[0032] To monitor the battery voltage and disconnect the battery connection when necessary, a resistor R3 is connected to the BAT pin of the control chip. The resistance value of this resistor is 200 ohms and it is used to detect changes in the battery voltage. When the battery voltage exceeds the safety threshold, the control chip will protect the battery from damage by disconnecting the connection.

[0033] Three capacitors in parallel - C5, C6, and C7, as well as the rechargeable battery BAT, are also connected to the BAT pin of the control chip. The capacitance values of these capacitors are 47uF, 100uF, and 47uF respectively, and they are used to stabilize the battery voltage and ensure that the battery can receive a stable charging current from the control chip.

[0034] Finally, to adjust the charging rate, a resistor R4 is connected to the PROG pin of the control chip. By changing the resistance value of resistor R4, the magnitude of the current flowing into the battery can be adjusted, thereby optimizing the charging time or adapting to different types of batteries. In this embodiment, the resistance value of resistor R4 is 1k ohms.

[0035] Through the above configuration, the fast - charging battery high - voltage protection circuit in this embodiment can achieve efficient and safe fast - charging functions, and clearly display the charging status through the LED indicator. At the same time, through reasonable capacitance and resistance parameter configurations, the stability and reliability of the circuit are ensured, effectively preventing potential problems such as overheating and high voltage, and extending the service life of the battery.

[0036] It should be noted that the parameter values in this embodiment are only examples, and can be adjusted and optimized according to specific requirements and conditions in actual applications. In addition, this embodiment is only a specific implementation method. For those of ordinary skill in the art, various changes, modifications, substitutions, and variations can be made according to the technical solution of this application to adapt to different application scenarios and requirements.

[0037] The beneficial effects of the technical solution of this application are mainly reflected in the following aspects:

[0038] Efficient fast - charging and safety protection: Through the intelligent management of the TP5410 control chip, the fast - charging function of the battery is realized. At the same time, the built - in protection mechanism can effectively monitor and control the charging process, prevent over - voltage and over - current situations, protect the battery from damage, and extend the service life of the battery.

[0039] Clear charging status indication: The red LED and green LED are used to intuitively display the charging status. The red LED indicates that the charging is in progress, and the green LED indicates that the charging is completed or in the standby state, which is convenient for users to master the charging process at any time and improves the user experience.

[0040] Voltage stability and filtering effect: In the circuit design, the reasonable layout of capacitors C1 to C7 can not only stably control the operating voltage of the chip, but also effectively filter out the ripple in the output voltage through capacitors C2 to C4 connected in parallel to the VOUT pin, ensuring the smoothness and stability of the charging current, reducing electromagnetic interference, and improving the charging efficiency and battery charging quality.

[0041] Flexible charging rate adjustment: The resistor R4 connected through the PROG pin can adjust the charging rate according to actual needs. This design increases the flexibility and adaptability of the circuit. Users can optimize the charging time or adapt to different types of batteries by simply changing the resistor value to meet diverse charging requirements.

[0042] Hardware protection design: The use of diode D1 ensures the unidirectional flow of current and prevents reverse current from damaging the battery and the circuit; diode D2 further enhances the system's protection against reverse current. Together with the monitoring of the battery voltage by resistor R3, a comprehensive hardware protection system is formed, improving the reliability and safety of the entire system.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage protection circuit for a fast-charging battery, characterized in that, It includes a control chip, the model of the control chip is TP5410, and also includes a power input terminal VIN. The power input terminal VIN is coupled to the control chip. The power input terminal VIN is electrically connected to a resistor R1 and a diode D1. The resistor R1 is electrically connected to the VCC pin of the control chip. The control chip is coupled to a charging indicator light. The control chip is coupled to a charging battery BAT through a protection circuit. The BAT pin of the control chip is electrically connected to the parallel-connected capacitors C5, C6, C7, and the charging battery BAT. The other ends of the capacitors C5, C6, C7, and the charging battery BAT are grounded.

2. The high-voltage protection circuit for a fast-charging battery according to claim 1, characterized in that The resistor R1 is electrically connected to a resistor R2 and a capacitor C1, and the capacitor C1 is grounded.

3. The high-voltage protection circuit for a fast-charging battery according to claim 2, characterized in that, The resistor R2 is electrically connected to two light-emitting diodes respectively. The two light-emitting diodes are a red LED and a green LED respectively. The red LED is electrically connected to the CHRG pin of the control chip, and the green LED is electrically connected to the STDBY pin of the control chip.

4. The high-voltage protection circuit for a fast-charging battery according to claim 3, wherein, The diode D1 is electrically connected to the VOUT pin of the control chip. The VOUT pin of the control chip is electrically connected to the parallel-connected capacitors C2, C3, C4 and then electrically connected to the output terminal. The other ends of the capacitors C2, C3, C4 are grounded respectively.

5. A high-voltage protection circuit for a fast-charging battery according to claim 4, characterized in that, The VOUT pin of the control chip is also electrically connected to a diode D2. The diode D2 is electrically connected to the LX pin of the control chip. The LX pin of the control chip is also electrically connected to a resistor R3.

6. The high-voltage protection circuit for a fast-charging battery according to claim 5, wherein The resistor R3 is electrically connected to the BAT pin of the control chip. The PROG pin of the control chip is electrically connected to a resistor R4 and then grounded.

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