Power supply system

Abstract

The utility model discloses a power supply system. The power supply system comprises a plurality of power supply assemblies which are connected in parallel; and the controller is connected with each power supply assembly, and the controller is used for turning on or turning off the power supply assemblies, so that the load rate of the turned-on power supply assemblies is within a preset range. The scheme can improve the light load efficiency of the power supply system.

Description

Technical Field

[0001] This application relates to the technical field of switching power supplies, and particularly to a power supply system. Background Art

[0002] In order to improve efficiency, high-power power supply systems usually select better devices, such as MOSFETs with higher switching speeds, thicker copper wires, more expensive magnetic materials, etc. By using better materials or paralleling more devices, the losses are reduced, thereby improving the efficiency of the system. This method often sacrifices cost to improve efficiency. Utility Model Content

[0003] An embodiment of this application provides a power supply system.

[0004] To achieve the above object, an embodiment of this application provides a power supply system, which includes:

[0005] A plurality of paralleled power supply components;

[0006] A controller, which is connected to each of the power supply components, and the controller is used to turn on or off the power supply components so that the load rate of the turned-on power supply components is within a preset range.

[0007] In one embodiment, the preset range is 40%-70%.

[0008] In one embodiment, when the number of the turned-on power supply components is equal to the preset minimum number of turned-on components or equal to the total number of power supply components, the power supply components are turned on according to the minimum number of turned-on components or the total number of power supply components.

[0009] In one embodiment, the power supply system further includes:

[0010] An output current sampling component, which is connected to the plurality of paralleled power supply components and to the controller; the output current sampling component is used to collect the total output current of the plurality of paralleled power supply components and send it to the controller;

[0011] A switch module, which includes a plurality of paralleled switches, and the number of the switches is the same as the number of the power supply components; the switches are connected to the power supply components in one-to-one correspondence;

[0012] The switch module is connected to the controller, and the controller controls the turning on or off of the switches in the switch module according to the received total output current, so as to turn on or off the power supply components corresponding to the switches.

[0013] In one embodiment, each of the power supply components includes a CAN communication interface;

[0014] The controller is connected to the CAN communication interface of each of the power supply components through a CAN communication bus.

[0015] In one embodiment, the multiple power supply components connected in parallel include high-efficiency power supply components and normal-efficiency power supply components;

[0016] When it is necessary to increase the activation of the power supply components, the high-efficiency power supply components are preferentially activated;

[0017] When it is necessary to increase the deactivation of the power supply components, the normal-efficiency power supply components are preferentially deactivated.

[0018] In one embodiment, the multiple power supply components connected in parallel include:

[0019] A basic power supply component and a redundant power supply component.

[0020] In one embodiment, the power supply component adopts a pluggable module.

[0021] The present application has the following beneficial effects compared with the prior art:

[0022] A power supply system is divided into multiple small power supply components connected in parallel, and the fixed losses are dispersed into each small power supply component. By turning off or on one or more power supply components, the fixed losses of the power supply system are changed. When the load is light, only a part of the power supply components are turned on, and the total fixed losses are reduced, thereby improving the light-load efficiency. Moreover, by arranging the power supply components in parallel, the number of power supply components turned on or off can be flexibly adjusted according to the load rate requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of the power supply system provided by the embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of the efficiency of the power supply system provided by the embodiment of the present application Figure 1 ;

[0026] Figure 3 It is another schematic structural diagram of the power supply system provided by the embodiment of the present application;

[0027] Figure 4Efficiency Schematic of the Power Supply System Provided by the Embodiment of the Present Application Figure 2 。 Detailed Implementation Manner

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0029] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0030] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0031] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "plurality" is two or more.

[0032] The losses of a switching power supply system can be divided into two parts. One part is the fixed loss, which does not change with the variation of the load power; the other part is the loss that increases as the load power increases, called the variable loss. The efficiency of the switching power supply system is the output power divided by the input power, and the input power of the switching power supply system is equal to the output power plus the fixed loss and the variable loss. It can be seen that the efficiency is actually equal to the output power divided by the sum of the output power, the fixed loss, and the variable loss. When the switching power supply operates at light load, due to the small load and small current, the variable loss is also small. While at heavy load, the load current is large and the variable loss is also large. However, regardless of light load or heavy load, the fixed loss remains unchanged. Therefore, the overall efficiency curve of a typical switching power supply system shows low efficiency at light load and gradually increases as the load increases. Since the fixed loss exists as long as the power supply system is working, it generally drags down the efficiency at light load, and the light load efficiency of general switching power supply systems is very low.

[0033] Based on the above, the present application provides a power supply system, which can improve the light load efficiency and make the overall efficiency curve of the switching power supply system be at a high level.

[0034] As Figure 1 shown, the power supply system provided by the present application includes:

[0035] Multiple power supply components 10 connected in parallel;

[0036] A controller 20, which is connected to each of the power supply components 10. The controller 20 is used to turn on or off the power supply components 10 so that the load rate of the turned-on power supply components 10 is within a preset range.

[0037] Specifically, all the power supply components 10 are connected in parallel. Among them, the power supply component 10 can adopt a DC / DC converter, an AC / DC rectifier or other types of power modules, which can provide the required voltage and current.

[0038] The controller 20 can monitor the load demand of the entire power supply system and decide which power supply components 10 need to be turned on and which can be turned off according to these demands, so that the load rate of the turned-on power supply components 10 is within a preset range. For example, when the load increases, the controller 20 may turn on additional power supply components 10 to share the load; when the load decreases, the controller 20 may turn off some power supply components 10 to improve the system efficiency. Among them, the controller 20 can adopt an analog circuit or a microprocessor or a microcontroller system, etc., and is selected according to actual needs.

[0039] Among them, the preset range of the load rate can be set according to actual needs. Usually, the efficiency of the power supply component 10 is the highest in the range of 40%-70% of the load rate. Optionally, the preset range of the load rate is 40%-70%, which can keep the efficiency of the power supply system in the high-efficiency range.

[0040] Exemplarily, the load rate of the turned-on power supply component 10 is within 40%-70%. Specifically: when the load rate of the turned-on power supply component 10 is lower than 40%, turn off one of the turned-on power supply components 10; when the load rate of the turned-on power supply component 10 is higher than 70%, turn on another power supply component 10.

[0041] In this embodiment, a power supply system is divided into multiple small power supply components in parallel, and the fixed losses are dispersed into each small power supply component. By turning off or on one or more power supply components, the fixed losses of the power supply system are changed. When the load is light, only a part of the power supply components are turned on, and the total fixed losses decrease, thereby improving the light-load efficiency. As Figure 2 shown, where Figure 2 the dotted line in is the efficiency curve of the power supply system in the prior art, Figure 2 the solid line in is the efficiency curve of the power supply system provided by this embodiment. It can be intuitively seen from the curve that the power supply system provided by this embodiment can improve the overall efficiency of the system. Also, by setting the power supply components in parallel, the number of turned-on or turned-off power supply components can be flexibly adjusted according to the load rate requirements.

[0042] In one embodiment, when the number of the turned-on power supply components 10 is equal to the preset minimum number of turned-on components or equal to the total number of power supply components, turn on the power supply components 10 according to the minimum number of turned-on components or the total number of power supply components. At this time, the number of turned-on and turned-off power supply components 10 is no longer limited by the preset range of the load rate.

[0043] Among them, the preset minimum number of turned-on components can be set according to actual needs.

[0044] This solution can ensure that at least the minimum number of turned-on power supply components 10 in the power supply system are operating, which can guarantee the stable output of the power supply system and avoid power supply shortage or system crash caused by too few power supply components 10. Also, although the efficiency of the power supply component 10 is the highest at a load rate of 40%-70%, in actual operation, it may not always be maintained in this range due to load fluctuations or other factors. Therefore, by setting the minimum number of turned-on components, it is ensured that the power supply system does not sacrifice reliability in pursuit of optimal efficiency.

[0045] In one embodiment, as Figure 3 shown, the power supply system further includes:

[0046] Output current sampling component 30, the output current sampling component 30 is connected to the multiple parallel power supply components 10 and is connected to the controller 20; the output current sampling component 30 is used to collect the total output current of the multiple parallel power supply components 10 and send it to the controller 20;

[0047] Switch module 40, the switch module 40 includes a number of parallel switches, and the number of switches is the same as the number of power supply components 10; the switches are connected to the power supply components 10 in one-to-one correspondence;

[0048] The switch module 40 is connected to the controller 20, and the controller 20 controls the opening or closing of the switches in the switch module 40 according to the received total output current, so as to turn on or off the power supply components 10 corresponding to the switches.

[0049] Specifically, the switches in the switch module 40 correspond to the power supply components 10 one by one, and the controller 20 controls the energization state of the corresponding power supply components 10 by controlling the opening or closing of these switches. Among them, the switches can be relays, solid-state switches, etc.

[0050] The output current sampling component C1 continuously monitors the total output current of the parallel power supply components 10 and sends the data to the controller 20, providing real-time current information for the controller 20 for precise control. Among them, the output current sampling component C1 can use a current sensor.

[0051] After receiving the current data, the controller 20 analyzes the current total output current and compares it with the rated current of the energy storage system or a preset load threshold. According to the comparison result, the controller 20 decides whether it is necessary to adjust the number of operating power supply components 10. For example, if an increase in output is required, the controller 20 will turn on additional switches; if a decrease in output is required, the controller 20 will turn off some switches.

[0052] The controller 20 turns on or off the corresponding power supply components 10 by controlling the switches in the switch module 40, thereby adjusting the output current of the entire system.

[0053] In this embodiment, the controller controls the opening or closing of the switches in the switch module according to the received total output current, and then turns on or off the power supply components corresponding to the switches. The components can provide stable and reliable power supply, and can also improve the light load efficiency of the power supply system.

[0054] In one embodiment, each of the power supply components 10 includes a CAN communication interface;

[0055] The controller 20 is connected to the CAN communication interfaces of each of the power supply components 10 through a CAN communication bus.

[0056] Specifically, the CAN communication interface is a standardized communication protocol for transmitting data between electronic devices. For example, it is used to transmit load information; and the power supply component 10 receives on / off commands through the CAN communication interface.

[0057] The CAN communication bus design can simplify wiring and allow the controller 20 to communicate bidirectionally with all power supply components 10.

[0058] The controller 20 receives the load information of each power supply component 10 in real time through the CAN communication bus. This information can include parameters such as current, voltage, and power. The controller 20 determines the current total load based on the received load information and compares it with the preset system capacity of the system to decide whether to increase or decrease the number of operating power supply components 10. For example, if the load increases, additional power supply components 10 may need to be turned on; if the load decreases, some power supply components 10 may be turned off to improve energy efficiency. The controller 20 sends commands to the specified power supply components 10 through the CAN communication bus to control their on / off states.

[0059] In this embodiment, the power supply component and the controller are connected through the CAN communication interface and the CAN communication bus. The connection is simple and convenient for modular design.

[0060] Improving the efficiency of the power supply component means increasing the cost of the power supply component. If only some of the power supply components are improved in efficiency and the high-efficiency power supply components are given priority to be in the working state, the efficiency of the power supply system can be further significantly improved under light load.

[0061] Based on the above, in one embodiment, multiple parallel power supply components 10 include high-efficiency power supply components and normal-efficiency power supply components;

[0062] When it is necessary to increase the number of power supply components 10 to be turned on, the high-efficiency power supply components are preferentially turned on;

[0063] When it is necessary to increase the number of power supply components 10 to be turned off, the normal-efficiency power supply components are preferentially turned off.

[0064] Specifically, when multiple parallel power supply components 10 include high-efficiency power supply components and normal-efficiency power supply components, the high-efficiency power supply components can be preferentially turned on, and the normal-efficiency power supply components can be preferentially turned off, that is, the high-efficiency power supply components are always preferentially kept in the working state.

[0065] Since the power supply component with priority work is a high-efficiency power supply component, which has a higher efficiency than the ordinary-efficiency power supply component during operation, only the high-efficiency power supply component works under light load, making the efficiency under light load higher than that after the ordinary-efficiency power supply component joins the work. In this way, the light-load efficiency of the power supply system can be further improved; and a good balance can be achieved between efficiency and cost. As Figure 4 shown, where Figure 4 the solid line in is the efficiency curve of the power supply system when all the power supply components are ordinary-efficiency power supply components, Figure 4 and the dotted line in is the efficiency curve of the power supply system when the power supply components use a combination of high-efficiency power supply components and ordinary-efficiency power supply components. By comparing the curves, it can be seen that using a combination of high-efficiency power supply components and ordinary-efficiency power supply components for the power supply components can further improve the efficiency under light load.

[0066] In one embodiment, a plurality of parallel power supply components 10 include:

[0067] a basic power supply component and a redundant power supply component.

[0068] Specifically, the number of redundant power supply components can be set according to actual needs. Exemplarily, the number of redundant power supply components is 4. That is, when the current load only needs to turn on 1 power supply component in the power supply system to meet the requirement, then 1 basic power supply component and 4 redundant power supply components are turned on.

[0069] In this embodiment, by designing the redundant power supply component, it is possible to avoid the power supply system shutting down due to overload in the case of load fluctuations of the power supply system.

[0070] In one embodiment, the power supply component 10 adopts a pluggable module, so that it can be easily replaced or upgraded when needed. This design also allows the power supply system to expand more power supply components according to requirements.

[0071] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power supply system, characterized in that, The power supply system includes: A plurality of power supply components (10) connected in parallel; A controller (20), the controller (20) is connected to each of the power supply components (10), and the controller (20) is used to turn on or off the power supply components (10) so that the load rate of the turned-on power supply components (10) is within a preset range.

2. The power supply system according to claim 1, wherein The preset range is 40%-70%.

3. The power supply system according to claim 1, characterized in that, When the number of the turned-on power supply components (10) is equal to the preset minimum turn-on number or equal to the total number of the power supply components, turn on the power supply components (10) according to the minimum turn-on number or the total number of the power supply components.

4. The power supply system according to claim 1, wherein The power supply system further includes: An output current sampling component (30), the output current sampling component (30) is connected to the plurality of power supply components (10) connected in parallel and is connected to the controller (20); the output current sampling component (30) is used to collect the total output current of the plurality of power supply components (10) connected in parallel and send it to the controller (20); A switch module (40), the switch module (40) includes a plurality of switches connected in parallel, and the number of the switches is the same as the number of the power supply components (10); the switches are connected to the power supply components (10) one by one; The switch module (40) is connected to the controller (20), and the controller (20) controls the turning on or off of the switches in the switch module (40) according to the received total output current to turn on or off the power supply components (10) corresponding to the switches.

5. The power supply system according to claim 1, characterized in that, Each of the power supply components (10) includes a CAN communication interface; The controller (20) is connected to the CAN communication interfaces of each of the power supply components (10) through a CAN communication bus.

6. The power supply system according to claim 1, characterized in that The plurality of power supply components (10) connected in parallel include high-efficiency power supply components and normal-efficiency power supply components; When it is necessary to increase the turned-on power supply components (10), the high-efficiency power supply components are preferentially turned on; When it is necessary to increase the turned-off power supply components (10), the normal-efficiency power supply components are preferentially turned off.

7. The power supply system according to claim 1, wherein The plurality of power supply components (10) connected in parallel include: Basic power supply components and redundant power supply components.

8. The power supply system according to claim 1, wherein The power supply components (10) adopt pluggable modules.

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