An ups energy storage exchanger

Abstract

The utility model discloses a UPS energy storage switch, it includes the switch mainboard and power board of mutual electricity connection. The power board includes AC input module, rectifier module, boost and buck module, battery charging circuit and DC side protection unit. The battery charging circuit is connected in parallel at the output of boost and buck module, and the boost and buck module includes the voltage reduction unit for converting the AC power output of rectifier module into low voltage DC and the boost module for converting low voltage DC into 52V DC, and the boost module outputs 52V voltage to 52V bus, and the battery charging circuit includes battery and bidirectional Buck-Boost controller, and the boost and buck module and battery charging circuit share 52V bus. The application provides a kind of integrated, miniaturization, AC and DC double input and self battery management switch power supply scheme, by designing battery charging circuit and boost and buck module parallel sharing 52V bus and control chip, device multiplexing rate is high, PCB area reduces 30%, and cost is low.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology for communication equipment, specifically a UPS energy storage switch. Background Technology

[0002] Existing power switches generally only support a single AC 100–240V power input, making them inoperable during power outages or in scenarios requiring DC power such as batteries or solar power. They also cannot charge energy storage batteries, resulting in the interruption of PoE functionality. Most existing UPS switches on the market are combinations of "AC UPS + ordinary switch," which are bulky, costly, have long switching times, and are incompatible with a wide range of DC inputs. Therefore, there is an urgent need for an integrated, miniaturized power supply solution for power switches that supports both AC and DC inputs and has built-in battery management. Utility Model Content

[0003] A brief overview of embodiments of the present invention is provided below to provide a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0004] Existing switches only support 220V input and do not support battery voltage input, so they cannot continue to be used after a power outage. To solve the above problems, this application provides a UPS switch power supply system that can provide 52V voltage output to the switch motherboard and PoE ports and has 9–52V battery charging / discharging management function. The circuit structure is optimized to solve the above technical problems at the lowest cost.

[0005] Specifically, this application discloses a UPS energy storage switch, comprising a switch motherboard and a power supply board electrically connected to each other. The switch motherboard has a PoE port. The power supply board includes an AC input module, a rectifier module, a buck-boost module, a battery charging circuit, and a DC-side protection unit. The output terminals of the AC input module are sequentially connected to the rectifier module, the buck-boost module, and the DC-side protection unit. The battery charging circuit is connected in parallel to the output terminal of the buck-boost module. The rectifier module is used to rectify the input current of the AC input module. The buck-boost module includes a step-down unit for converting the AC power output from the rectifier module into low-voltage DC power and a boost module for converting the low-voltage DC power into 52V DC power. The boost module outputs 52V voltage to the 52V bus. The battery charging circuit includes a battery and a bidirectional Buck-Boost controller.

[0006] Furthermore, the battery charging circuit also includes a control chip, inductor LF4, current-sensing resistor, and voltage divider network, shared with the 52V bus. When the AC input module is normal, the control chip controls the bidirectional Buck-Boost controller to operate in Buck mode, with the input connected to the 52V bus, and the output charging the battery (battery voltage below 52V) via inductor LF4, current-sensing resistor, and voltage divider network. When the AC input module loses power, the control chip controls the bidirectional Buck-Boost controller to switch to Boost mode, boosting the battery voltage to 52V, providing uninterrupted power to the switch through the 52V bus. After a mains power failure, the 52V bus is maintained by the battery boost, with a switching time of <10ms. The 52V bus also provides power to the switch motherboard and PoE ports, with a peak output power ≥240W.

[0007] This application achieves a high degree of integration by specially designing the AC to DC step-down / boost module and the battery charging circuit, which share a 52V bus and control chip, thereby solving the above-mentioned technical problems at the lowest cost.

[0008] Furthermore, the DC-side protection unit includes a fuse, a TVS (Transient Voltage Suppressor) surge protection device, and a reverse connection protection circuit. The fuse is connected in series with the positive terminal of the battery, the TVS surge protection device is connected in parallel with the battery terminal, and the reverse connection protection circuit includes a MOSFET Q6. The gate of the MOSFET Q6 is connected to the bidirectional Buck-Boost controller, the source of the MOSFET Q6 is connected to the negative terminal of the battery, and the drain of the MOSFET Q6 is connected to the 52V bus ground.

[0009] Preferably, the control chip is implemented using an AS2464-ESSOP chip. The bidirectional Buck-Boost controller is implemented using a bidirectional buck-boost control chip, and is connected between the 52V bus and the battery interface, capable of switching between charging, UPS, and direct-connect modes. The bidirectional Buck-Boost module adopts a 4-switch synchronous topology and is controlled and driven by the AS2464-ESSOP control chip.

[0010] Other modules of the UPS energy storage switch have not been improved. For example, the switch motherboard, PoE PSE chip and various ports (such as RJ-45) are all implemented using existing technology. Therefore, this application omits the description of other modules of the UPS energy storage switch.

[0011] Furthermore, the AC-to-DC buck / boost module includes a PFC (Power Factor Correction) circuit and an LLC (inductor-inductor-capacitor) DC-DC converter. Even further, the rectifier module uses an LD7792GS chip.

[0012] The circuit structure designed in this application has the following advantages compared with the prior art:

[0013] 1. By connecting the battery charging circuit and the step-up / step-down module in parallel to share the 52V bus and control chip, the component reuse rate is high, the PCB area is reduced by 30%, and the cost is low.

[0014] 2. When the AC input module loses power, the battery seamlessly switches over with a switching time of <10ms, meeting the uninterrupted requirements of special fields (such as IT / security equipment).

[0015] 3. It can provide 240W peak power to the switch motherboard, PoE ports and external batteries at the same time.

[0016] In summary, this application is compatible with multiple inputs, including AC100–240V, DC9–52V, solar power, and automotive, making it suitable for various scenarios such as home, commercial, and industrial applications. The battery interface supports a wide input range of 9–52V and features reverse connection, overvoltage, undervoltage, and overtemperature protection. Attached Figure Description

[0017] This invention can be better understood by referring to the following description taken in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the drawings to denote the same or similar parts. These drawings, together with the following detailed description, are incorporated in and form part of this specification, and are used to further illustrate preferred embodiments of the invention and explain the principles and advantages of the invention. In the drawings:

[0018] Figure 1 This is a schematic block diagram of the UPS energy storage switch of this utility model;

[0019] Figure 2 This is a circuit diagram of the power supply board of the UPS energy storage switch of this utility model.

[0020] Figure 3 This is a circuit diagram of the battery charging and discharging circuit of the power board of the UPS energy storage switch of this utility model.

[0021] Figure 4 This is a circuit diagram of the boost circuit of the power board of the UPS energy storage switch of this utility model. Detailed Implementation

[0022] Embodiments of the present invention will now be described with reference to the accompanying drawings. Elements and features described in one drawing or embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that, for clarity, representations and descriptions of components and processes unrelated to the present invention and known to those skilled in the art have been omitted from the drawings and description.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Existing switches only support AC100-240V input and cannot simultaneously support DC9-52V input, nor can they charge energy storage batteries. Therefore, this invention provides a new, cost-effective UPS switch with added battery circuitry and battery charging / discharging circuitry. It is suitable for residential, commercial, and industrial applications, supporting AC100V-240V input as well as DC9V-52V input. In addition to network transmission, the ports also support PoE power supply, meeting the needs of customers in different input environments.

[0025] For details, see Figure 1 This embodiment of a UPS energy storage switch includes a switch motherboard and a power supply board electrically connected to each other. The switch motherboard has a PoE port. The power supply board includes an AC input module, a rectifier module, a buck-boost module, a battery charging circuit, and a DC-side protection unit. The output terminal of the AC input module is sequentially connected to the rectifier module, the buck-boost module, and the DC-side protection unit (for overcurrent and overvoltage protection of the 52V bus). The battery charging circuit is connected in parallel to the output terminal of the buck-boost module (i.e., the 52V bus). The rectifier module is used to rectify the input current of the AC input module. The buck-boost module includes a step-down unit for converting the AC power output from the rectifier module into low-voltage DC power and a boost module for converting the low-voltage DC power into 52V DC power. The boost module outputs 52V voltage to the 52V bus. The battery charging circuit includes a battery and a bidirectional Buck-Boost controller.

[0026] In this embodiment, see Figures 2-4The battery charging circuit also includes a control chip, inductor LF4, current sensing resistor, and voltage divider network, which are shared with the 52V bus. When the AC input module is normal, the control chip controls the bidirectional Buck-Boost controller to work in Buck mode. The input terminal is connected to the 52V bus, and the output terminal charges the battery (battery voltage is below 52V) through inductor LF4, current sensing resistor, and voltage divider network. When the AC input module loses power, the control chip controls the bidirectional Buck-Boost controller to switch to Boost mode, boosting the battery voltage to 52V, and providing uninterrupted power to the switch through the 52V bus.

[0027] This application achieves a high degree of integration by specially designing the AC to DC step-down / boost module and the battery charging circuit, which share a 52V bus and control chip, thereby solving the above-mentioned technical problems at the lowest cost.

[0028] The DC-side protection unit includes a fuse, a TVS (Transient Voltage Suppressor) surge protector, and a reverse connection protection circuit. The fuse is connected in series with the positive terminal of the battery. The TVS surge protector is connected in parallel with the battery terminal. The reverse connection protection circuit includes a MOSFET Q6. The gate of MOSFET Q6 is connected to a bidirectional Buck-Boost controller, the source of MOSFET Q6 is connected to the negative terminal of the battery, and the drain of MOSFET Q6 is connected to the 52V bus ground. In this embodiment, MOSFET Q6 is a 100V / 100AP channel MOSFET used to prevent reverse current from the battery to the 52V bus. Its gate is controlled by the bidirectional Buck-Boost controller GATE, achieving "non-destructive" reverse connection protection when turned off. The fuse (T2A / 250V) is connected in series with the positive terminal of the battery to prevent external short circuits. The TVS surge protector is a 60VTVS (SMB package) connected in parallel with the battery terminal CN6, providing 2kV surge protection.

[0029] In this embodiment, see Figures 2-4 The control chip is implemented using the AS2464-ESSOP model. The bidirectional Buck-Boost controller is implemented using a bidirectional buck-boost control chip, connected between the 52V bus and the battery interface, and can switch between charging, UPS, and pass-through modes. Using inductor LF4 as the energy storage inductor, MOSFET Q6 as the upper and lower bridge, the bidirectional Buck-Boost controller AS2464-ESSOP drives the system, resistor R50 detects current, and a voltage divider network R60 / R59 sets the voltage to 52V, efficiently boosting the 9–52V battery energy to the 52V bus for full-load operation of the switch motherboard and PoE ports.

[0030] The AC-to-DC buck / boost module includes a PFC (Power Factor Correction) circuit and an LLC (inductor-inductor-capacitor) DC-DC converter. In this embodiment, the rectifier module is implemented using an LD7792GS chip. The AC mains power passes through fuse F1, NTCRT2, common-mode inductors LF1 / LF2, and rectifier bridge DB1 to obtain 300V DC. The LD7792GS (U1) drives the PFC boost inductor L1 and the LLC half-bridge to output a stable 52V / 120W bus. This bus directly powers the switch motherboard and PoE ports, eliminating the need for a secondary DC / DC converter and reducing losses.

[0031] This utility model provides a stable and reliable power supply system for switch equipment, meeting its motherboard power supply and PoE output requirements, while also enabling battery charging, ensuring normal operation of the equipment in different scenarios. In the buck-boost circuit, an AC-to-DC buck circuit is used to convert AC 220V mains power to DC 14V output. This circuit uses a transformer for voltage transformation, along with components such as a rectifier bridge and filter capacitors, to convert AC power into smooth DC power. This design features high efficiency and high stability, effectively reducing power consumption and providing a stable low-voltage DC input for subsequent circuits. In the buck-boost circuit, the boost circuit can convert DC 14V to 52V to power the switch motherboard and enable PoE output. This circuit is based on the switching power supply principle, controlling the switching frequency and duty cycle of the switching transistor to achieve voltage boosting. This design can meet the high voltage requirements of the switch equipment, ensuring stable operation. The battery charging and discharging circuit enables the charging function of the battery. When the mains power is normal, the DC14V output from the AC to DC step-down circuit is used by the charging management chip to charge the battery safely and efficiently. When the mains power is interrupted, the battery can automatically supply power to the switch, ensuring the continuous operation of the equipment and improving the system's reliability and emergency response capabilities.

[0032] This solution integrates buck, boost, and battery charging functions, featuring a compact structure and comprehensive functionality. The various circuit modules work together to provide a stable power supply for the switch, making it suitable for various complex environments and effectively improving the equipment's applicability and reliability. This new UPS switch can achieve: seamless switching between AC100–240V and DC9–52V dual inputs; provide a stable 52V bus for the switch motherboard and PoE ports; perform CC / CV charging and UPS discharge management for the 9–52V battery; mains power failure switching time <10ms; and overall efficiency ≥94%. It can be used in residential, commercial, and industrial applications, supporting AC100V-240V input as well as DC 9V-52V input. It can also charge the energy storage battery, which can then power the switch when the AC input fails. In addition to network transmission, the network ports also support PoE power supply, meeting customer needs in different input environments.

[0033] Although the present invention has been disclosed above through the description of specific embodiments, it should be understood that all the embodiments and examples described above are exemplary and not restrictive. Those skilled in the art can design various modifications, improvements, or equivalents to the present invention within the spirit and scope of the appended claims. These modifications, improvements, or equivalents should also be considered to be included within the protection scope of the present invention.

Claims

1. A UPS energy storage switch, characterized in that: The system includes a switch motherboard and a power supply board that are electrically connected to each other. The switch motherboard has a PoE port. The power supply board includes an AC input module, a rectifier module, a buck-boost module, a battery charging circuit, and a DC-side protection unit. The output terminals of the AC input module are sequentially connected to the rectifier module, the buck-boost module, and the DC-side protection unit. The battery charging circuit is connected in parallel to the output terminal of the buck-boost module. The rectifier module is used to rectify the input current of the AC input module. The buck-boost module includes a step-down unit for converting the AC output from the rectifier module into low-voltage DC and a boost module for converting the low-voltage DC into 52V DC. The boost module outputs 52V voltage to the 52V bus. The battery charging circuit includes a battery and a bidirectional Buck-Boost controller. The buck-boost module and the battery charging circuit share the 52V bus.

2. The UPS energy storage switch according to claim 1, characterized in that: The battery charging circuit also includes a control chip, an inductor LF4, a current-sensing resistor, and a voltage divider network. When the AC input module is normal, the control chip controls the bidirectional Buck-Boost controller to operate in Buck mode, with the input terminal connected to the 52V bus and the output terminal charging the battery via the inductor LF4, the current-sensing resistor, and the voltage divider network. When the AC input module loses power, the control chip controls the bidirectional Buck-Boost controller to switch to Boost mode, boosting the battery voltage to 52V and providing uninterrupted power to the switch via the 52V bus.

3. The UPS energy storage switch according to claim 1 or 2, characterized in that: The DC-side protection unit includes a fuse, a TVS surge protector, and a reverse connection protection circuit consisting of a MOSFET Q6. The fuse is connected in series with the positive terminal of the battery, and the TVS surge protector is connected in parallel with the battery terminal. The MOSFET Q6 is a P-channel MOSFET. The gate of the MOSFET Q6 is connected to a bidirectional Buck-Boost controller, the source of the MOSFET Q6 is connected to the negative terminal of the battery, and the drain of the MOSFET Q6 is connected to the 52V bus ground.

4. The UPS energy storage switch according to claim 2, characterized in that: The control chip is implemented using a chip of model AS2464-ESSOP.

5. The UPS energy storage switch according to claim 2, characterized in that: The bidirectional Buck-Boost controller is implemented using a bidirectional buck-boost control chip.

6. The UPS energy storage switch according to claim 1, characterized in that: The buck-boost module includes a PFC power factor correction circuit and an LLC DC-DC converter.

7. The UPS energy storage switch according to claim 1, characterized in that: The rectifier module is implemented using a chip with the model number LD7792GS.

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