CN219611365U

CN219611365U - Quick charging circuit

Info

Publication number: CN219611365U
Application number: CN202320009150.3U
Authority: CN
Inventors: 张文; 李郭俊杰
Original assignee: Sichuan Qianli Beoka Medical Technology Inc
Current assignee: Sichuan Qianli Beoka Medical Technology Inc
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-08-29
Anticipated expiration: 2033-01-04

Abstract

The utility model relates to the field of battery charging, in particular to a quick charging circuit which greatly improves the charging adaptability, can be compatible with most quick charging and does not need to be provided with a special adapter. The quick charging circuit comprises an interface module, a protocol module and a charging module, wherein the protocol module is respectively connected with the interface module and the charging module, the protocol module comprises a quick charging protocol chip, the quick charging protocol chip integrates a USBPD quick charging protocol, and the USBPD quick charging protocol is compatible with various quick charging protocols; the voltage output pin of the fast charge protocol chip is connected with the variable resistor, and the external adapter outputs corresponding voltage to the charging module by changing the resistance value of the variable resistor, and the charging module charges the battery module according to the received voltage. The utility model is suitable for quick charging of the battery.

Description

Quick charging circuit

Technical Field

The utility model relates to the field of battery charging, in particular to a quick charging circuit.

Background

Different electronic products have different battery capacities and different charging protocols, and batteries with different capacities and different charging protocols are charged by using different adapters, so that the battery charging device is very inconvenient to use.

A multi-protocol quick charging circuit and device disclosed in the prior art such as CN217427719U comprises a switching power supply circuit module and a charging circuit module; the input end of the switching power supply circuit module is connected with the mains supply, and the output end of the switching power supply circuit module is connected with the charging circuit module; the charging circuit module comprises an LD6612 chip, the LD6612 chip comprises a CC1 pin and a CC2 pin, and the CC1 pin and the CC2 pin can be electrically connected with an external charging interface. According to the scheme, the output voltage source of the switching power supply module is mainly transmitted to the LD6612 chip for output, and the LD6612 chip can be compatible with various fast charging protocol chips such as PD3.0, PPS and QC4.0, so that the charging interface protocol requirements of most mainstream electronic products can be met, and load devices of different protocols can be charged fast.

The scheme can meet the charging interface protocol requirements of most mainstream electronic products, but the charging voltage requirements of different load devices on output are different. Therefore, there is a need for a fast charging circuit that adapts both the charging protocol and the charging voltage.

Disclosure of Invention

The utility model aims to provide a quick charging circuit which greatly improves the charging adaptability, is compatible with most quick charging and does not need to be provided with a special adapter.

The utility model adopts the following technical scheme to realize the aim, and the quick charging circuit comprises an interface module, a protocol module and a charging module, wherein the protocol module is respectively connected with the interface module and the charging module, the protocol module comprises a quick charging protocol chip, the quick charging protocol chip integrates a USB PD quick charging protocol, and the USB PD quick charging protocol is compatible with various quick charging protocols; the voltage output pin of the fast charge protocol chip is connected with the variable resistor, and the external adapter outputs corresponding voltage to the charging module by changing the resistance value of the variable resistor, and the charging module charges the battery module according to the received voltage.

Further, in order to improve the working efficiency of the external adapter, the voltage output pins CFG1 of the types CH224K and CH224K of the fast charging protocol chip are connected with the variable resistor.

Further, the quick charging circuit further comprises a key, a display module and an MCU, wherein the MCU is respectively connected with the charging module, the key and the display module, and after the key is pressed, the MCU reads the battery electric quantity information and displays the electric quantity information through the display module.

Further, in order to protect the fast charging protocol chip CH224K, the second pin VDD of the fast charging protocol chip CH224K is connected to the voltage output terminal of the external adapter through the first resistor R1.

Further, in order to perform filtering processing on the output voltage of the adapter, the third pin GND of the fast charging protocol chip CH224K is grounded and connected to the first resistor R1 through a filter capacitor.

Further, in order to improve the data transmission capability, the first data pin DP, the second data pin DM, the third data pin CC1 and the fourth data pin CC2 of the interface module are respectively connected to the fourth pin DP, the fifth pin DM, the sixth pin CC1 and the seventh pin CC2 of the fast charging protocol chip CH 224K.

Further, in order to improve the charging efficiency, the charging module includes a charging management chip, a second capacitor C2, an inductor L1 and a third capacitor C3, the second capacitor C2 is connected with the third capacitor C3 through the inductor L1, two ends of the second capacitor C2 and the third capacitor C3 are respectively connected with the charging management chip, the second capacitor C2, the inductor L1 and the third capacitor C3 form a bootstrap circuit, and the charging management chip is connected with the battery module.

Further, in order to simplify the physical occupation space of the circuit, the model of the charge management chip is JW3655E, and the inside of the charge management chip JW3655E is composed of four MOS tubes to form an H bridge.

Further, in order to filter the corresponding voltage output by the adapter, the charging module further includes a first capacitor C1, one end of the first capacitor C1 is connected to the charging management chip, and the other end is grounded.

Further, in order to filter the voltage output by the charging management chip, the charging module further includes a fourth capacitor C4, and one end of the charging management chip connected to the battery module is further grounded through the fourth capacitor C4.

Further, to increase the battery capacity, the battery module employs at least 4 21700 lithium batteries in series.

According to the utility model, the first pin CFG1 of the fast charging protocol chip CH224K is connected with the variable resistor, the external adapter outputs corresponding voltage to the charging module by changing the resistance value of the variable resistor, and the charging module charges the battery module of the portable oxygenerator according to the received voltage, so that the adaptation of the charging voltage is completed, and the charging adaptability is greatly improved; the fast charging protocol chip CH224K integrates USB PD fast charging protocols, is compatible with various fast charging protocols, and completes the adaptation of the charging protocols in the mode, so that most of fast charging can be compatible, and a special adapter is not required to be equipped. The user charging experience is greatly improved.

Drawings

Fig. 1 is a block diagram of a structure provided in an embodiment of the present utility model.

Fig. 2 is a circuit structure diagram of a protocol module according to an embodiment of the present utility model.

Fig. 3 is a circuit configuration diagram of a charging module according to an embodiment of the present utility model.

In the drawing, R1 is a first resistor, C1 is a filter capacitor, VBUS represents the output power voltage of the adapter, P1 is a Type-C interface module, U1 is a fast charging protocol chip, U2 is a charging management chip, C0 is a filter capacitor, C1 is a first capacitor, C2 is a second capacitor, C3 is a third capacitor, C4 is a fourth capacitor, Q1, Q2, Q3 and Q4 are MOS tubes, L1 is an inductor, and BAT represents a battery module.

Detailed Description

The utility model relates to a quick charge circuit, which comprises an interface module, a protocol module and a charging module, wherein the protocol module is respectively connected with the interface module and the charging module, the protocol module comprises a quick charge protocol chip, the quick charge protocol chip integrates a USB PD quick charge protocol, and the USB PD quick charge protocol is compatible with various quick charge protocols; the voltage output pin of the fast charge protocol chip is connected with the variable resistor, and the external adapter outputs corresponding voltage to the charging module by changing the resistance value of the variable resistor, and the charging module charges the battery module according to the received voltage.

In the scheme, the model of the fast charge protocol chip is CH224K, and a voltage output pin CFG1 of the CH224K is connected with the variable resistor. The second pin VDD of the fast charge protocol chip CH224K is connected with the voltage output end of the external adapter through the first resistor R1, and protection of the fast charge protocol chip CH224K is realized through current limiting of the first resistor R1. The third pin GND of the fast charging protocol chip CH224K is grounded and connected to the first resistor R1 through a filter capacitor. The filtering processing of the output voltage of the adapter is realized.

The first data pin DP, the second data pin DM, the third data pin CC1 and the fourth data pin CC2 of the interface module are respectively connected with the fourth pin DP, the fifth pin DM, the sixth pin CC1 and the seventh pin CC2 of the fast charging protocol chip CH224K, so that the data transmission capability is improved.

The charging module comprises a charging management chip, a second capacitor C2, an inductor L1 and a third capacitor C3, wherein the second capacitor C2 is connected with the third capacitor C3 through the inductor L1, the two ends of the second capacitor C2 and the third capacitor C3 are respectively connected with the charging management chip, the second capacitor C2, the inductor L1 and the third capacitor C3 form a bootstrap circuit, and the charging management chip is connected with a battery module of the portable oxygenerator. The model of the charging management chip is JW3655E, so that the charging efficiency is improved. The inside of the charge management chip JW3655E is provided with an H bridge by four MOS tube assemblies, so that the physical occupation space of a circuit is simplified.

The charging module further comprises a first capacitor C1, one end of the first capacitor C1 is connected with the charging management chip, and the other end of the first capacitor C1 is grounded. The filtering processing of the corresponding voltage output by the adapter is realized. The charging module further comprises a fourth capacitor C4, and one end, connected with the battery module, of the charging management chip is grounded through the fourth capacitor C4. The filtering processing of the voltage output by the charging management chip is realized. The battery modules are connected in series by at least 4 21700 lithium batteries. The battery capacity is improved.

The utility model is described in further detail below with reference to fig. 1-3.

The structure block diagram of the quick charging circuit is shown in fig. 1, and comprises a Type-C interface module, a protocol module, a charging module, a battery protection module, a battery module, an MCU (Microcontroller Unit, a micro control unit), a key and an LED display.

The protocol module comprises a fast charging protocol chip CH224K, the fast charging protocol chip CH224K integrates USB PD fast charging protocols, is compatible with high-pass QC3.0 and 4.0 (Quick charging technology developed by high-pass company for being equipped with a Cellon processor), is SCP and FCP, PE3.0 and PE2.0 of MTK and protocols such as VOOC of OPPO and the like, supports 100W power at the highest, is internally provided with a PD communication module, has high integration level and is simplified in periphery. Integrating output voltage detection function and providing over-temperature and over-voltage protection.

As shown in fig. 2, the protocol module circuit structure is that the external adapter is connected to the fast charging protocol chip U1 through a TYPE-C interface P1, the TYPE of U1 is CH224K, and a first data pin DP, a second data pin DM, a third data pin CC1 and a fourth data pin CC2 of the TYPE-C interface P1 are respectively connected with a fourth pin DP, a fifth pin DM, a sixth pin CC1 and a seventh pin CC2 of the fast charging protocol chip U1; the power supply pin VCC is connected with an external adapter output power supply voltage VBUS, the external adapter output power supply voltage VBUS is connected to a VDD pin of the fast charge protocol chip U1 through a first resistor R1, current limiting is carried out through the resistor R1, and the chip U1 is protected; the pin GND of the fast charge protocol chip U1 is connected with the first resistor R1 through a filter capacitor C0; the first pin CFG1 of the fast charging protocol chip U1 is grounded through a resistor R2, wherein the resistance value of the resistor R2 can be set, and the adapter can output a corresponding voltage to the charging module by setting the value of the resistor R2. The relationship between the resistance value and the corresponding voltage on the first pin CFG1 is as follows:

resistance value on first pin CFG1	Corresponding voltage
		6.8KΩ	9V
24KΩ	12V
		56KΩ	15V
NC	20V

The circuit structure diagram of the charging module is shown in fig. 3, after the voltage output by the adapter is filtered by the first capacitor C1, a step-up and step-down bootstrap circuit is formed by the charging management chip U2, the second capacitor C2, the inductor L1 and the third capacitor C3, wherein the second capacitor C2 and the third capacitor C3 are used as bootstrap capacitors.

The charging management chip adopts JW3655E, an H bridge (only part of connection relations are shown in the figure) is formed by an MOS tube Q1, an MOS tube Q2, an MOS tube Q3 and an MOS tube Q4 in the inside to realize the voltage increasing and decreasing function, and the output is filtered by a fourth capacitor to charge the battery module BAT. The battery module adopts 4 21700 lithium batteries in series connection, and the capacity is 5000 milliamp/hour. Because of the large capacity of the battery, if the common adapter is used for a long time of charging, the quick charging circuit can greatly shorten the charging time and improve the user experience.

The LED display is used for displaying the battery electric quantity, when the battery is particularly used, the key is pressed to start charging, the control module reads the battery capacity data, and the battery capacity data is displayed through the LED.

The beneficial effects of the utility model are as follows:

1. the integrated extremely high protocol chip and the charging management chip are adopted, so that the PCB space is greatly saved;

2. most of quick charging can be compatible, and the quick charging or common adapter can be used for charging;

3. the battery electric quantity can be displayed in real time;

4. the charging of the large-capacity battery of the portable oxygen generator can be simplified, a special adapter is not needed, and the cost is saved.

The described embodiments of the utility model are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Claims

1. The fast charging circuit is characterized by comprising an interface module, a protocol module and a charging module,

the protocol module is respectively connected with the interface module and the charging module, the protocol module comprises a quick charging protocol chip, the quick charging protocol chip integrates a USB PD quick charging protocol, and the USB PD quick charging protocol is compatible with various quick charging protocols; the voltage output pin of the quick charge protocol chip is connected with the variable resistor, the external adapter outputs corresponding voltage to the charging module by changing the resistance value of the variable resistor, and the charging module charges the battery module according to the received voltage;

the charging module comprises a charging management chip, a second capacitor (C2), an inductor (L1) and a third capacitor (C3), wherein the second capacitor (C2) is connected with the third capacitor (C3) through the inductor (L1), the two ends of the second capacitor (C2) and the third capacitor (C3) are respectively connected with the charging management chip, the second capacitor (C2), the inductor (L1) and the third capacitor (C3) form a bootstrap circuit, and the charging management chip is connected with the battery module.

2. The fast charge circuit according to claim 1, wherein the fast charge protocol chip is of the type CH224K, the voltage output pin (CFG 1) of CH224K is connected to a variable resistor.

3. The quick charge circuit according to claim 1 or 2, further comprising a key, a display module and an MCU, wherein the MCU is connected to the charging module, the key and the display module, and after the key is pressed, the MCU reads the battery power information and displays the power information through the display module.

4. The fast charging circuit according to claim 2, wherein the second pin (VDD) of the fast charging protocol chip CH224K is connected to the voltage output terminal of the external adapter through a first resistor (R1), and the third pin (GND) of the fast charging protocol chip CH224K is grounded and connected to the first resistor (R1) through a filter capacitor.

5. The fast charging circuit according to claim 2, wherein the first Data Pin (DP), the second data pin (DM), the third data pin (CC 1) and the fourth data pin (CC 2) of the interface module are respectively connected to the fourth pin (DP), the fifth pin (DM), the sixth pin (CC 1) and the seventh pin (CC 2) of the fast charging protocol chip CH 224K.

6. The quick charge circuit according to claim 1 or 2, wherein the model of the charge management chip is JW3655E, and the charge management chip JW3655E is internally provided with an H-bridge composed of four MOS tubes.

7. The fast charging circuit according to claim 1 or 2, wherein the charging module further comprises a first capacitor (C1), one end of the first capacitor (C1) is connected to the charging management chip, and the other end is grounded.

8. The fast charging circuit according to claim 1 or 2, wherein the charging module further comprises a fourth capacitor (C4), and the end of the charge management chip connected to the battery module is further grounded via the fourth capacitor (C4).

9. The quick charge circuit of claim 1 wherein the battery modules are connected in series with at least 4 21700 lithium batteries.