A single-stage PFC gallium nitride power supply non-inductive power distribution method and system

Abstract

The present invention relates to a non-inductive power distribution method and system for a single-stage PFC gallium nitride power supply, comprising the following steps: a main control chip of the gallium nitride power supply monitors the status of multiple charging interfaces; when a charging interface is connected to a load, establishes communication with the load and obtains charging parameter information of the load; if the acquisition fails, a set detection charging strategy is adopted to charge the load, and a temperature change curve of the charging interface is monitored; the main control chip predicts the output power value range when the charging interface reaches a set safe charging range based on the feedback temperature change curve; and a set charging strategy is matched based on the obtained output power value range; the method of the present application is applicable not only to loads that can obtain charging parameters through communication, but also to most loads that cannot obtain charging parameters through communication, and load charging power can be distributed according to priority, thereby having better adaptability and more scientific and efficient charging.

Description

Technical Field

[0001] The present invention relates to the technical field of gallium nitride power supplies, and more particularly to a method and system for non-inductive power distribution of a single-stage PFC gallium nitride power supply. Background Art

[0002] A GaN power supply is a power module designed using the superior properties of GaN materials. It offers advantages such as high energy efficiency, compact size, high-temperature stability, and a wide range of applications. The combination of GaN power supplies and PFC technology has been a key trend in power supply design in recent years. Its core focus is on optimizing the performance of power factor correction (PFC) circuits by leveraging the high-frequency and high-efficiency characteristics of GaN devices.

[0003] Existing single-stage PFC gallium nitride power supplies are usually difficult to intelligently distribute power when connected to multiple different loads. Alternatively, it is necessary to collect the load model, match the model, and then select the stored corresponding power for output. This method can solve the problem to a certain extent, but the defects are also very obvious: 1. It cannot match loads of unknown models; 2. The power distribution between multiple loads charged simultaneously is unclear. A single-stage PFC gallium nitride power supply non-sensing power distribution method and system that can solve these defects is needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a single-stage PFC gallium nitride power supply non-inductive power distribution method and a single-stage PFC gallium nitride power supply non-inductive power distribution system in response to the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A method for non-inductive power distribution of a single-stage PFC gallium nitride power supply is constructed, characterized in that the method comprises the following steps:

[0007] Step 1: The GaN power supply's main control chip monitors the status of multiple charging ports. When a charging port is connected to a load, it establishes communication with the load and obtains the load's charging parameter information. If the information is obtained successfully, a charging strategy is generated based on the information and the process proceeds to step 5. If the information fails, the process proceeds to the next step.

[0008] Step 2: Use the set detection and charging strategy to charge the load and monitor the temperature change curve of the charging interface;

[0009] Step 3: The main control chip predicts the output power range when the charging port reaches the set safe charging range based on the feedback temperature change curve;

[0010] Step 4: Match the set charging strategy based on the obtained output power value range;

[0011] Step 5: When only a single charging port is connected to a load, the load is charged directly according to the charging strategy;

[0012] Step 6: When there are multiple charging ports connected to loads, determine whether the sum of the powers corresponding to the multiple charging strategies exceeds the total output power of the power supply. If not, charge the corresponding loads directly according to the charging strategy. If yes, charge the loads according to the set priority strategy.

[0013] Step 7: During the charging process, the charging status of the load is constantly monitored. If any abnormality occurs, charging is stopped and a warning is issued.

[0014] In the non-inductive power distribution method for a single-stage PFC gallium nitride power supply of the present invention, charging the load using a set detection charging strategy includes:

[0015] Increase the charging current gradually according to the set charging current curve with a gradually rising trend;

[0016] After the entire charging current curve is completed, the load is charged with the set minimum current and waits for subsequent actions.

[0017] In the non-inductive power distribution method for a single-stage PFC gallium nitride power supply of the present invention, the charging current curve is obtained by:

[0018] Get information about multiple commonly used loads;

[0019] Statistics of the maximum charging current value of each load in the safe charging state;

[0020] Taking the minimum value among the multiple maximum charging current values as the vertex value of the charging current curve, and subtracting a constant value from the vertex value as the starting value of the charging current curve;

[0021] A coordinate system is established with time as the horizontal axis and the charging current value as the vertical axis, and a charging current curve is generated in the coordinate system with the set curvature, vertex value and starting value.

[0022] In the single-stage PFC gallium nitride power supply non-inductive power distribution method described in the present invention, the charging current curve corresponds to multiple loads belonging to the same product type. If it is possible to face a scenario where multiple loads of different product types are charged simultaneously, multiple charging current curves are set and the multiple charging current curves are bound to multiple charging interfaces in a one-to-one correspondence.

[0023] In the non-inductive power distribution method for a single-stage PFC gallium nitride power supply according to the present invention, the priority strategy includes:

[0024] Sort by the set priority from high to low, giving priority to charging the loads with high priority;

[0025] If the priorities are the same, determine whether the sum of the power required by all loads with the same priority is greater than the allocatable power. If so, distribute the allocatable power evenly; otherwise, charge all loads with the same priority at the same time.

[0026] In the present invention, the GaN power supply has a non-inductive power distribution method for a single-stage PFC (Purple Frequency Converter) power supply. Each charging port of the GaN power supply is equipped with a temperature detection resistor circuit. The loop of the temperature detection resistor circuit includes a temperature-sensitive resistor bonded to the charging port. The temperature change curve is obtained by monitoring the voltage or current in the loop of the temperature detection resistor circuit.

[0027] The single-stage PFC gallium nitride power supply non-inductive power distribution method of the present invention, wherein the gallium nitride power supply establishes communication with the connected load according to a set protocol and obtains charging parameter information of the load.

[0028] A single-stage PFC gallium nitride power supply non-sensing power distribution system, wherein the system includes: a main control chip, multiple charging interfaces, multiple interface temperature detection units and a memory;

[0029] The interface temperature detection unit is used to detect the temperature of the charging interface;

[0030] The memory is used to store the set charging strategy;

[0031] The main control chip is used to execute the above-mentioned single-stage PFC gallium nitride power supply non-inductive power distribution method.

[0032] The beneficial effect of the present invention is that the method of the present application is not only applicable to loads that can communicate to obtain charging parameters, but can also adapt to most loads that cannot communicate to obtain charging parameters, and can distribute load charging power according to priority, which has better adaptability and more scientific and efficient charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts.

[0034] Figure 1 This is a flow chart of a non-inductive power distribution method for a single-stage PFC gallium nitride power supply according to a preferred embodiment of the present invention;

[0035] Figure 2This is a principle block diagram of a single-stage PFC gallium nitride power supply non-inductive power distribution system according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the following will be a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work shall fall within the scope of protection of the present invention.

[0037] The single-stage PFC gallium nitride power supply non-inductive power distribution method of the preferred embodiment of the present invention is as follows: Figure 1 As shown, the following steps are included:

[0038] S01: The GaN power supply's main control chip monitors the status of multiple charging ports. When a charging port is connected to a load, it establishes communication with the load and obtains the load's charging parameter information. If the information is obtained successfully, a charging strategy is generated based on the information and the process proceeds to step 5. If the information fails, the process proceeds to the next step.

[0039] In the first step, load identification is performed. If the identification is successful, the system can directly jump to the priority allocation stage. Otherwise, output power prediction is required. The prediction method is described below.

[0040] S02: Charge the load using the set detection charging strategy and monitor the temperature change curve of the charging interface;

[0041] Specifically include:

[0042] Increase the charging current gradually according to the set charging current curve with a gradually rising trend;

[0043] After the entire charging current curve is completed, the load is charged with the set minimum current and waits for subsequent actions.

[0044] The charging current curve is obtained using:

[0045] Get information about multiple commonly used loads;

[0046] Statistics of the maximum charging current value of each load in the safe charging state;

[0047] Taking the minimum value among the multiple maximum charging current values as the vertex value of the charging current curve, and subtracting a constant value from the vertex value as the starting value of the charging current curve;

[0048] A coordinate system is established with time as the horizontal axis and the charging current value as the vertical axis, and a charging current curve is generated in the coordinate system with the set curvature, vertex value and starting value;

[0049] The constant value and the set curvature can be set based on experience and are not limited thereto;

[0050] Since the charging power of different types of products may vary greatly, further product type restrictions are required:

[0051] The charging current curve corresponds to multiple products of the same type. If there is a scenario where multiple loads of different product types are charged at the same time, multiple charging current curves can be set and bound to multiple charging interfaces in a one-to-one correspondence.

[0052] Taking mobile phones and laptops as an example, two different charging ports are required. The charging current curve of each charging port is designed for the two products respectively. This can effectively solve the problem of too large a span when there are multiple product types.

[0053] It is understandable that if it is only targeting a product type, such as a mobile phone, then it does not need to be so complicated and only a charging current curve can be designed.

[0054] S03: The main control chip predicts the output power range when the charging port reaches the set safe charging range based on the feedback temperature change curve;

[0055] Since the specific charging data of the load cannot be obtained, it is necessary to make a prediction based on the curve. Generally speaking, when the temperature of the charging interface does not exceed the safe range, charging is generally safe and stable. Of course, the charging status is further supplemented in the subsequent step 7 to ensure charging safety.

[0056] S04: matching and setting a charging strategy based on the obtained output power value range;

[0057] Here you can further customize the charging strategy. Specifically, the charging process can be divided into several processes: fast charging, slow charging, and trickle charging. This part of the design can adopt the existing design and will not be elaborated on.

[0058] S05: When only a single charging port is connected to a load, the load is charged directly according to the charging strategy. If there is only one load, the power distribution issue of multiple loads does not arise at this time, and the load can be charged directly according to the charging strategy.

[0059] S06: When there are multiple charging ports connected to loads, determine whether the sum of the powers corresponding to the multiple charging strategies exceeds the total output power of the power supply. If not, charge the corresponding loads directly according to the charging strategy. If so, charge the loads according to the set priority strategy.

[0060] If there are multiple loads, then the design needs to be based on actual needs; the priority strategies include:

[0061] Sort by the set priority from high to low, giving priority to charging the loads with high priority;

[0062] If the priorities are the same, determine whether the sum of the power requirements of all loads with the same priority is greater than the allocatable power. If so, distribute the allocatable power evenly. Otherwise, charge all loads with the same priority at the same time.

[0063] S07: The charging status of the load is constantly monitored during the charging process. If any abnormality occurs, charging is stopped and a warning is issued.

[0064] The method and approach of the present application is not only applicable to loads that can obtain charging parameters through communication, but can also adapt to most loads that cannot obtain charging parameters through communication, and can distribute load charging power according to priority, which has better adaptability and makes charging more scientific and efficient.

[0065] Preferably, the gallium nitride power supply is equipped with a temperature detection resistor circuit for each charging interface. The loop of the temperature detection resistor circuit includes a thermistor attached to the charging interface. The temperature change curve is obtained by monitoring the voltage or current in the loop of the temperature detection resistor circuit.

[0066] Preferably, the gallium nitride power supply establishes communication with the connected load according to a set protocol and obtains charging parameter information of the load.

[0067] A single-stage PFC GaN power supply non-inductive power distribution system, such as Figure 2 As shown, the system includes: a main control chip 10, multiple charging interfaces 11, multiple interface temperature detection units 12 and a memory 13;

[0068] An interface temperature detection unit 12 is used to detect the temperature of the charging interface 11;

[0069] Memory 13, used to store the set charging strategy;

[0070] The main control chip 10 is used to execute the above-mentioned single-stage PFC gallium nitride power supply non-inductive power distribution method;

[0071] The system of the present application is not only suitable for loads that can communicate to obtain charging parameters, but can also adapt to most loads that cannot communicate to obtain charging parameters. It can also distribute load charging power according to priority, which has better adaptability and more scientific and efficient charging.

[0072] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A method for non-inductive power distribution of a single-stage PFC gallium nitride power supply, characterized in that: The method comprises the following steps: Step 1: The GaN power supply's main control chip monitors the status of multiple charging ports. When a charging port is connected to a load, it establishes communication with the load and obtains the load's charging parameter information. If the information is obtained successfully, a charging strategy is generated based on the information and the process proceeds to step 5. If the information fails, the process proceeds to the next step. Step 2: Charge the load using the set detection charging strategy and monitor the temperature change curve of the charging interface; Step 3: The main control chip predicts the output power range when the charging port reaches the set safe charging range based on the feedback temperature change curve; Step 4: Match the set charging strategy based on the obtained output power value range; Step 5: When only a single charging port is connected to a load, the load is charged directly according to the charging strategy; Step 6: When there are multiple charging ports connected to loads, determine whether the sum of the powers corresponding to the multiple charging strategies exceeds the total output power of the power supply. If not, charge the corresponding loads directly according to the charging strategy. If yes, charge the loads according to the set priority strategy. Step 7: During the charging process, the charging status of the load is constantly monitored. If any abnormality occurs, charging is stopped and a warning is issued. The method of charging the load by adopting the set detection charging strategy includes: Increase the charging current gradually according to the set charging current curve with a gradually rising trend; After the entire charging current curve is completed, the load is charged with the set minimum current and waits for subsequent actions; The charging current curve is obtained by: Get information about multiple commonly used loads; Statistics of the maximum charging current value of each load in the safe charging state; Taking the minimum value among the multiple maximum charging current values as the vertex value of the charging current curve, and subtracting a constant value from the vertex value as the starting value of the charging current curve; A coordinate system is established with time as the horizontal axis and the charging current value as the vertical axis, and a charging current curve is generated in the coordinate system with the set curvature, vertex value and starting value.

2. The method for non-inductive power distribution of a single-stage PFC gallium nitride power supply according to claim 1, characterized in that: The charging current curve corresponds to multiple loads belonging to the same product type. If there is a scenario where multiple loads of different product types are charged at the same time, multiple charging current curves are set, and the multiple charging current curves are bound to multiple charging interfaces in a one-to-one correspondence.

3. The method for non-inductive power distribution of a single-stage PFC gallium nitride power supply according to claim 1, characterized in that: The priority strategies include: Sort by the set priority from high to low, giving priority to charging the loads with high priority; If the priorities are the same, determine whether the sum of the power required by all loads with the same priority is greater than the allocatable power. If so, distribute the allocatable power evenly; otherwise, charge all loads with the same priority at the same time.

4. The method for non-inductive power distribution of a single-stage PFC gallium nitride power supply according to claim 1, characterized in that: The gallium nitride power supply is equipped with a temperature detection resistor circuit for each charging interface. The loop of the temperature detection resistor circuit includes a thermistor attached to the charging interface. The temperature change curve is obtained by monitoring the voltage or current in the loop of the temperature detection resistor circuit.

5. The method for non-inductive power distribution of a single-stage PFC gallium nitride power supply according to claim 1, characterized in that: The gallium nitride power supply establishes communication with the connected load according to a set protocol and obtains charging parameter information of the load.

6. A single-stage PFC gallium nitride power supply non-inductive power distribution system, characterized in that: The system includes: a main control chip, multiple charging interfaces, multiple interface temperature detection units and a memory; The interface temperature detection unit is used to detect the temperature of the charging interface; The memory is used to store the set charging strategy; The main control chip is used to execute the non-inductive power distribution method for a single-stage PFC gallium nitride power supply according to any one of claims 1 to 5.

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