Large-current charging circuit and charger

Abstract

The utility model provides a large-current charging circuit and a charger. The large-current charging circuit comprises a charging interface, a power management chip, a first charging chip and a second charging chip. The charging interface is respectively connected with the power management chip, the first charging chip and the second charging chip, the power management chip, the first charging chip and the second charging chip are connected in parallel, and the power management chip, the first charging chip and the second charging chip are respectively connected with the battery; and the power management chip is used for reading the state of the battery and judging the charging stage of the battery according to the voltage, and when the charging stage is a fast charging stage, the first charging chip and the second charging chip are controlled to enter a fast charging mode and charge the battery at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to charging technical field especially designs a kind of large current charging circuit and a kind of charger. BACKGROUND

[0002] With the continuous progress of mobile intelligent terminal technology, the demand of users for fast charging technology is increasing, especially on mobile terminals such as game consoles, large-capacity batteries equipped to ensure long-term use have become standard. However, the traditional low-power charging scheme takes a long time to charge when charging such large-capacity batteries, which seriously affects the user experience. Therefore, developing more efficient and faster charging technology has become a problem to be solved. SUMMARY

[0003] The utility model aims at at least one of the technical problems in the related art. To this end, the first purpose of the utility model is to provide a large current charging circuit, which controls and monitors the state of each stage in the charging cycle by comprehensively controlling the battery voltage, capacity and charging current, and intelligently adjusts the matching charging chip in real time to realize safe and stable fast charging.

[0004] The second purpose of the utility model is to provide a charger.

[0005] To achieve the above purpose, the first aspect of the utility model provides a large current charging circuit, which comprises a charging interface, a power management chip, a first charging chip and a second charging chip. The charging interface is connected with the power management chip, the first charging chip and the second charging chip respectively. The power management chip, the first charging chip and the second charging chip are connected in parallel. The power management chip, the first charging chip and the second charging chip are connected with the battery respectively. The power management chip is used to read the voltage of the battery and judge the charging stage of the battery according to the voltage. When the charging stage is the fast charging stage, the first charging chip and the second charging chip are controlled to enter the fast charging mode and charge the battery at the same time.

[0006] In addition, the large current charging circuit according to the above embodiments of the utility model can also have the following additional technical features:

[0007] As an optional embodiment, the power management chip is also used to control the first charging chip and the second charging chip to enter the bypass mode when the charging stage of the battery is the pre-charging stage and the constant voltage stage.

[0008] As an optional embodiment, the charging interface is used to connect an external power supply.

[0009] As an optional embodiment, the charging interface is a standard USB TYPE_C interface.

[0010] As an optional embodiment, the model of the power management chip is PM8550B.

[0011] As an optional embodiment, the model of the first charging chip is SMB1394.

[0012] As an optional embodiment, the model of the second charging chip is SMB1394.

[0013] As an optional embodiment, the charging interface is connected to the power management chip through a CC pin.

[0014] As an optional embodiment, the charging interface is connected to the power management chip, the first charging chip and the second charging chip through a VBUS pin.

[0015] According to the large-current charging circuit, the charging interface is connected to the power management chip, the first charging chip and the second charging chip, the power management chip, the first charging chip and the second charging chip are connected in parallel, and the power management chip, the first charging chip and the second charging chip are connected to the battery respectively.

[0016] To achieve the above object, the second aspect of the utility model provides a kind of charger, and the charger includes above-mentioned large-current charging circuit and battery, battery is charged by large-current charging circuit.

[0017] According to the charger provided by the utility model, the charging interface is connected to the power management chip, the first charging chip and the second charging chip, the power management chip, the first charging chip and the second charging chip are connected in parallel, and the power management chip, the first charging chip and the second charging chip are connected to the battery respectively.

[0018] The additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only illustrate the present application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0020] Figure 1 The large-current charging circuit framework schematic diagram provided by the embodiment of the present application.

[0021] Figure 2 The large-current charging circuit schematic diagram provided by the embodiment of the present application.

[0022] Figure 3 The charger schematic diagram provided by the embodiment of the present application.

[0023] Reference signs: 100-large current charging circuit, 10-charging interface, 20-power management chip, 101-first charging chip, 102-second charging chip, 200-battery, 300-charger. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will further illustrate the present application in detail with specific embodiments and reference to the drawings.

[0025] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by those skilled in the art to which the present application belongs. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connection" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] As described in the background section, with the rapid development of mobile intelligent terminal technology, fast charging technology has become the focus of increasing user attention. In order to meet the needs of mobile terminal users such as game consoles for long-term use, current mobile terminals are generally equipped with larger capacity batteries, and 8000MAH has become a basic configuration. However, the traditional low-power charging scheme (such as 5V / 1A or 9V / 3A) takes as long as 4-5 hours to charge such large capacity batteries, greatly affecting the user experience.

[0027] To solve this problem, fast charging technology has emerged. This technology can charge an 8000MAH battery to full in 1-1.5 hours at room temperature, significantly improving charging speed. This means that in situations where devices are urgently needed, users can quickly obtain sufficient power, enabling them to use them as they charge without having to wait for a long time. This feature is particularly suitable for business travel, outdoor activities and other application scenarios, providing great convenience to users.

[0028] In the following, the technical solutions of the present application are further described in detail through specific embodiments.

[0029] Reference Figure 1 The large current charging circuit framework schematic diagram provided by the present application embodiment.

[0030] The large current charging circuit 100 includes a charging interface 10, a power management chip (main charger) 20, a first charging chip (CHARGE PUMP1) 101, and a second charging chip (CHARGE PUMP2) 102; the charging interface 10 is connected with the power management chip 20, the first charging chip 101 and the second charging chip 102 respectively, the power management chip 20, the first charging chip 101 and the second charging chip 102 are connected in parallel, and the power management chip 20, the first charging chip 101 and the second charging chip 102 are connected with the battery 200 respectively; the power management chip 20 is used for reading the voltage of the battery 200, and judging the charging stage of the battery according to the voltage, when the charging stage is the fast charging stage, controlling the first charging chip 101 and the second charging chip 102 to enter the fast charging mode, and charging the battery 200 at the same time.

[0031] Specifically, the charging interface 10 is a bridge connecting the circuit to the external power supply, responsible for introducing the external power supply into the internal circuit. It is connected to the power management chip 20, the first charging chip 101 and the second charging chip 102, ensuring that the power supply can be distributed to each charging chip. The power management chip 20 is responsible for monitoring the voltage state of the battery 200. According to the battery voltage, the power management chip 20 can determine the current charging stage of the battery (such as the fast charging stage, the ordinary charging stage, etc.). When it is determined to be in the fast charging stage, the power management chip 20 will send a signal to the first charging chip 101 and the second charging chip 102, instructing them to enter the fast charging mode. The first charging chip 101 and the second charging chip 102 are connected in parallel and share the charging task. They are each connected to the battery 200 and can convert the power provided by the external power supply into a current and voltage suitable for battery charging. Under the instruction of the power management chip 20, they can enter the fast charging mode at the same time to charge the battery with higher power. When the power management chip 20 detects that the voltage of the battery 200 is within the range suitable for fast charging, it will determine that it is in the fast charging stage. Subsequently, the power management chip 20 will send a fast charging mode start signal to the first charging chip 101 and the second charging chip 102. In the fast charging mode, the first charging chip 101 and the second charging chip 102 will work simultaneously to charge the battery 200 in parallel. This parallel charging method can significantly improve the charging speed and shorten the charging time.

[0032] As an optional embodiment, the power management chip 20 is also used to control the first charging chip 101 and the second charging chip 102 to enter the bypass mode when the charging stage of the battery is the pre-charging stage and the constant voltage stage.

[0033] Specifically, after the battery 200 is extremely low or has not been used for a long time, direct high-current charging may cause damage to the battery. Therefore, before fast charging, there is usually a pre-charging stage. In this stage, the power management chip 20 will detect that the battery voltage is low and control the first charging chip 101 and the second charging chip 102 to enter the bypass mode (i.e. bypass mode). In this mode, the two charging chips do not directly participate in the charging process, but allow a small current to pass through, which is used to gradually wake up the battery and preheat the internal materials of the battery, preparing for the next fast charging stage. At the same time, the power management chip 20 may selectively control the first charging chip 101 and the second charging chip 102 to pre-charge with a small current to ensure the safety of the battery.

[0034] When the battery is close to full, in order to avoid overcharging and protect the battery life, the charging process will enter the constant voltage stage. At this stage, the power management chip 20 will detect that the battery voltage has reached the preset constant voltage value, and control the first charging chip 101 and the second charging chip 102 to enter the bypass mode. At this time, the two charging chips will not directly participate in the charging process, but will hand over the charging task to the power management chip 20 to maintain a constant voltage, ensuring that the battery can continue to charge at a stable speed until it is full.

[0035] Through the control of the pre-charge stage and the constant voltage stage, the power management chip 20 can more effectively protect the battery from damage and prolong the service life of the battery. In the fast charging stage, all charging chips are fully utilized, while in the pre-charge and constant voltage stages, the bypass mode is used to reduce unnecessary energy loss and improve overall charging efficiency. The power management chip 20 can flexibly adjust the charging strategy according to the real-time state of the battery, ensuring that the charging process is both fast and safe.

[0036] As an optional embodiment, the charging interface is used to access an external power source.

[0037] Specifically, the charging interface 10 is designed to access an external power source, which serves as the connection point of the circuit to the external power source, ensuring that the electrical energy can be smoothly introduced into the internal circuit.

[0038] As an optional embodiment, the charging interface is a standard USB TYPE_C interface.

[0039] In a specific embodiment, the charging interface 10 adopts a standard USB TYPE_C interface. This interface not only has wide compatibility, but also supports high-speed data transmission and larger current transmission capacity, making it very suitable for large-current charging scenarios.

[0040] As an optional embodiment, the model of the power management chip 20 is PM8550B.

[0041] The model of the power management chip 20 is PM8550B. This chip is known for its excellent power management capabilities and stability, and can accurately read the battery voltage and determine the charging stage of the battery according to the voltage, thereby controlling the working mode of the charging chip.

[0042] Among them, the PM8550 chip is a powerful power management chip, mainly used for battery management and charging control of mobile devices. Specifically, it may contain the following functions:

[0043] Battery charging management: control the charging process of the battery, including the management of charging current, charging voltage, charging temperature and other parameters, to ensure the safety and fast charging of the battery.

[0044] Battery discharge management: control the discharge process of the battery, including the management of parameters such as output voltage, output current, battery temperature, etc. of the battery, to ensure stable power supply of the battery.

[0045] Battery protection: monitor the state of the battery, such as overcharge, overdischarge, overcurrent, overtemperature, etc. abnormal conditions, and take appropriate protective measures to prevent battery damage or safety accidents.

[0046] Power path management: according to the different working states and needs of the device, select the most suitable power path to ensure the normal work and energy saving of the device.

[0047] As an optional embodiment, the model of the first charging chip 101 is SMB1394.

[0048] As an optional embodiment, the model of the second charging chip 102 is SMB1394.

[0049] The first charging chip 101 and the second charging chip 102 are selected as SMB1394. This chip has the characteristics of high performance and low power consumption, and is very suitable for use in parallel charging circuit, and shares the charging task with the power management chip 20.

[0050] Among them, the SMB1394 chip can be used in various electronic devices, especially in occasions that require efficient power management or charging function. Due to its small size and high performance characteristics, the SMB1394 chip may have wide application in smart phones, tablet computers, mobile power supplies and other portable devices.

[0051] As an optional embodiment, the charging interface 10 is connected to the power management chip 20 through the CC pin.

[0052] The charging interface 10 is connected to the power management chip 20 through the CC (Configuration Channel) pin. The CC pin is used to transmit configuration information to ensure smooth communication between the charging interface and the power management chip.

[0053] As an optional embodiment, the charging interface 10 is connected to the power management chip 20, the first charging chip 101 and the second charging chip 102 through the VBUS pin.

[0054] The charging interface 10 is also connected to the power management chip 20, the first charging chip 101 and the second charging chip 102 through the VBUS (Voltage Bus) pin. The VBUS pin is the power bus, which is responsible for distributing the power provided by the external power supply to each charging chip.

[0055] The large-current charging circuit provided by the embodiment of the utility model, including charging interface, power management chip, first charging chip and second charging chip, charging interface is connected with power management chip, first charging chip and second charging chip respectively, power management chip, first charging chip and second charging chip are parallelly connected, power management chip, first charging chip and second charging chip are connected with battery respectively, power management chip is used for reading the voltage of battery, and judges the charging stage of battery according to voltage, when the charging stage is fast charging stage, control first charging chip and second charging chip enter fast charging mode, and charge battery simultaneously, the utility model discloses a comprehensive control of battery voltage, electric quantity and charging current, monitors each stage state in charging CYCLE, and realizes the real-time intelligent adjustment of matching charging chip, and realizes the safe and stable fast charging.

[0056] Reference Figure 2 The large-current charging circuit schematic diagram provided by the embodiment of the utility model.

[0057] As an optional embodiment, the large-current charging circuit provided by the utility model includes a standard USB TYPE-C interface, a 2:1 step-down SMB1394 charge pump chip, a step-down PM8550B PMIC chip, and a battery. Through the USB TYPE-C interface, the VBUS pin provides power input to the parallelly connected SMB1394 and PM8550B chips, and the CC pin is connected to the PM8550B. The two chips are connected in parallel and output, and together charge the battery. The battery has a sense function inside and can realize battery gauge (electricity monitoring) function. The utility model can realize comprehensive control and monitor the state of each stage in the charging process, and realize real-time intelligent adjustment and matching to achieve safe and stable fast charging.

[0058] The standard USB TYPE-C interface is a new connection standard, which has the advantages of fast data transmission speed, fast charging speed, wide application range, and low interface power consumption.

[0059] In the utility model, the TYPE-C interface provides power input through the VBUS pin and is connected to the PM8550B chip through the CC pin to realize control and monitoring of the charging function.

[0060] The 2:1 step-down SMB1394 charge pump chip is a DC-DC converter based on a switched capacitor architecture, which has the advantages of high efficiency, miniaturization, and low cost.

[0061] In the utility model, the SMB1394 chip and the PM8550B chip are connected in parallel, and together receive power input from the USB TYPE-C interface and convert it to a voltage suitable for battery charging.

[0062] The PM8550B PMIC chip, which is a PMIC (Power Management Integrated Circuit), is responsible for battery charging and power management functions.

[0063] In the utility model, the PM8550B chip is connected with the USB TYPE-C interface through the CC pin and receives the charging control signal. At the same time, it is connected in parallel with the SMB1394 chip and outputs, providing charging power for the battery.

[0064] In addition, the battery has a sense function inside, which can realize the battery gauge function. The battery is charged by receiving the parallel output power of the SMB1394 and PM8550B chips.

[0065] In the specific implementation, the USB TYPE-C interface receives power input through the VBUS pin and transmits it to the parallel SMB1394 and PM8550B chips. The PM8550B chip receives the charging control signal from the USB TYPE-C interface through the CC pin and adjusts the charging current and voltage according to the state and charging demand of the battery. The SMB1394 and PM8550B chips output power in parallel and charge the battery together. The two chips realize the matching and adjustment of voltage and current through the internal circuit to ensure the safety and stability of the charging process. The sense function inside the battery monitors the battery power state in real time and feeds back information to the charging system. The charging system adjusts the charging parameters in real time according to the state of the battery to realize intelligent charging.

[0066] As known from the above, the utility model connects the SMB1394 and PM8550B chips in parallel, improves the charging efficiency, and realizes fast charging. Through the comprehensive control and monitoring of battery voltage, power and charging current, the safety and stability of the charging process are realized. According to the state and charging demand of the battery, the charging parameters are adjusted in real time to realize intelligent charging, which is suitable for various portable electronic devices that need efficient, safe and stable charging.

[0067] Figure 3 The charger schematic diagram provided for the utility model embodiment.

[0068] The charger 200 includes the large-current charging circuit 100 and the battery 200, and the battery 200 is charged through the large-current charging circuit 100.

[0069] According to the charger provided by the embodiment of the utility model, the power management chip is used for reading the voltage of the battery, and the charging stage of the battery is judged according to the voltage, when the charging stage is the fast charging stage, the first charging chip and the second charging chip are controlled to enter the fast charging mode, and the battery is charged at the same time, the voltage, the power and the charging current of the battery are comprehensively controlled, the state of each stage in the charging CYCLE is monitored, the charging chip is intelligently adjusted in real time, and the safe and stable fast charging is realized.

[0070] It should be noted that, unless otherwise defined, technical or scientific terms used in the embodiments of the utility model should be understood as the common meaning by those skilled in the art to which the embodiments of the utility model belong. The "first", "second" and similar words used in the embodiments of the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, and do not exclude other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0071] Although the spirit and principles of the utility model have been described with reference to several specific embodiments, it should be understood that the utility model is not limited to the disclosed specific embodiments, and the division of aspects does not mean that the features in these aspects cannot be combined to benefit, and the division is only for the convenience of description. The utility model aims to cover various modifications and equivalent arrangements included in the spirit and scope of the appended claims. The scope of the appended claims is the widest possible interpretation, so as to contain all such modifications and equivalent structures and functions.

Claims

1. A large current charging circuit, characterized by, The application relates to a large-current charging circuit and a battery. The charging interface is connected with the power management chip, the first charging chip and the second charging chip respectively, the power management chip, the first charging chip and the second charging chip are connected in parallel, and the power management chip, the first charging chip and the second charging chip are connected with a battery respectively. The power management chip is used for reading the voltage of the battery, judging the charging stage of the battery according to the voltage, and controlling the first charging chip and the second charging chip to enter a fast charging mode when the charging stage is a fast charging stage, and charging the battery at the same time. The power management chip is also used for controlling the first charging chip and the second charging chip to enter a bypass mode when the charging stage of the battery is a pre-charging stage and a constant voltage stage.

2. The high current charging circuit of claim 1, wherein, The charging interface is used for accessing an external power supply.

3. The high current charging circuit of claim 2, wherein, The charging interface is a standard USB TYPE C interface.

4. The high current charging circuit of claim 3, wherein, The model of the power management chip is PM8550B.

5. The high current charging circuit of claim 2, wherein, The model of the first charging chip is SMB1394.

6. The high current charging circuit of claim 2, wherein, The model of the second charging chip is SMB1394.

7. The high current charging circuit of claim 2, wherein, The charging interface is connected with the power management chip through a CC pin.

8. The high current charging circuit of claim 3, wherein, The charging interface is connected with the power management chip, the first charging chip and the second charging chip through a VBUS pin.

9. The high current charging circuit of claim 2, wherein, The application relates to a large-current charging circuit and a battery.

10. A charger characterized by comprising: The battery is charged through the large-current charging circuit.

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