Double-power-source power supply device

Abstract

The utility model discloses a double-path power supply device which comprises an energy storage battery high-voltage box and a commercial power supply circuit. The commercial power supply circuit comprises a commercial power access end, a circuit breaker, an uninterruptible power supply, a switching power supply, a diode and a power supply end which are connected in sequence; a direct current voltage reduction module, a protection circuit, a wiring terminal and a wire outlet terminal are arranged in the energy storage battery high-voltage box; the direct current voltage reduction module reduces the direct current high voltage of the battery cluster accessed by the wiring terminal into direct current 24V, and the output voltage is adjustable; and the protection circuit comprises a high-voltage circuit breaker and a fuse which is connected in series with the high-voltage circuit breaker on a direct-current line. According to the utility model, on the basis of the traditional UPS power supply in the energy storage industry, one path of power supply is added, so that the control system can still work reliably and start the energy storage system to perform grid-connected or off-grid work under the condition that the UPS fails or the UPS battery is lack of power, and the reliability and the stability of the system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage device technical field, specifically related to a dual power supply device. BACKGROUND

[0002] With the wide application of energy storage equipment in power system, the stability and reliability of energy storage equipment are more and more important, and the power supply of control, communication and other systems is extremely important, which is directly related to whether the equipment can run long-term, stable and efficiently.

[0003] At present, the energy storage system on the market all adopts traditional UPS standby power supply to ensure the reliability of system power supply. However, this kind of device also has obvious shortcomings, the reliability of UPS device, the performance and service life of UPS standby battery seriously affect the reliability of system power supply. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a dual power supply device, which is used for ensuring the stability of system power supply.

[0005] In order to realize the above-mentioned purpose, the utility model provides a dual power supply device, which comprises an energy storage battery high-voltage box and a commercial power supply circuit.

[0006] The commercial power supply circuit comprises a commercial power access end, a circuit breaker, an uninterruptible power supply, a switching power supply, a diode and a power supply end connected in sequence.

[0007] The energy storage battery high-voltage box is internally provided with a direct-current voltage reduction module, a protection circuit, a wiring terminal and an outgoing terminal.

[0008] The direct-current voltage reduction module reduces the direct-current high-voltage power of the battery cluster connected to the wiring terminal to direct-current 24V power, and the output voltage is adjustable.

[0009] The protection circuit comprises a high-voltage circuit breaker and a fuse connected in series with the high-voltage circuit breaker on a direct-current line, the battery cluster is connected to the direct-current voltage reduction module through the high-voltage circuit breaker and the fuse, and the direct-current voltage reduction module is connected to the diode through the outgoing terminal.

[0010] Preferably, the high-voltage circuit breaker is electrically connected with a switching state detection circuit.

[0011] Preferably, the diode is a common double cathode diode.

[0012] Preferably, the switching state detection circuit is connected to a battery management system and uploads the switching state to a host computer for display through communication.

[0013] Preferably, the battery management system is installed inside the energy storage battery high-voltage box. ADVANTAGEOUS EFFECTS

[0014] The device increases one power supply on the basis of traditional UPS power supply in the energy storage industry, ensures that the control system can still work reliably in the case of UPS failure or UPS battery power shortage, starts the energy storage system to work in grid-connected or off-grid mode, and improves the reliability and stability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the electrical schematic diagram of the dual power supply device of the embodiment of the utility model; DETAILED DESCRIPTION

[0016] The utility model will be further illustrated in combination with the drawings and specific embodiments, the embodiment is implemented on the premise of the technical scheme of the utility model, and it should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model.

[0017] As Figure 1 shown, a DC 24V dual power supply device includes an energy storage battery high-voltage box PDU1 and a commercial power supply circuit, which realizes dual power supply of the device.

[0018] The commercial power supply circuit includes a commercial power access end, a circuit breaker, an uninterruptible power supply (i.e. UPS, an AC uninterruptible power supply), a switching power supply, a diode, and a power supply end connected in sequence.

[0019] One power supply comes from commercial power AC 220V, which is connected to the circuit breaker QF2 after being connected to the commercial power access end X1, and is connected to the uninterruptible power supply V3, the output end of the uninterruptible power supply V3 is connected to the input end of the switching power supply V2, after rectification and filtering of the switching power supply VV2, the positive output is connected to the 2 pin of the common cathode diode VD1, the 1 pin of the common cathode diode VD1 is connected to the positive terminal of the power supply end X2, which is used as the positive bus of the 24V power supply.

[0020] The energy storage battery high-voltage box is provided with a DC voltage reduction module, a protection circuit, a wiring terminal, and an output terminal.

[0021] The DC voltage reduction module reduces the DC high voltage of the battery cluster connected to the wiring terminal to DC 24V, and the output voltage is adjustable.

[0022] The protection circuit includes a high-voltage circuit breaker and a fuse connected in series with the high-voltage circuit breaker on one DC line, the battery cluster is connected to the DC voltage reduction module through the high-voltage circuit breaker and the fuse, and the DC voltage reduction module is connected to the diode through the output terminal.

[0023] One power supply comes from the energy storage lithium battery, the high voltage line of the battery cluster is connected to the terminal X4 of the high voltage box PDU1, connected to the voltage reduction module V1 through the high voltage circuit breaker QF1 and the fuse FU1, reduced to DC 24V and connected to the outlet terminal X3, the positive pole of the outlet terminal X3 is connected to the 3-pin of the common cathode diode VD1, the negative pole of the outlet terminal X3 is connected in parallel with the negative pole of the switching power supply V2 output to the negative terminal of the power supply end X2, as the negative bus of the 24V power supply.

[0024] In the embodiment, the high voltage circuit breaker is electrically connected with a switch state detection circuit, the switch state detection circuit is connected to the battery management system BMS, and the switch state is uploaded to the upper computer for display through communication.

[0025] In the embodiment, the battery management system BMS is installed in the energy storage battery high voltage box PDU1.

[0026] Compared with the prior art, the device adds one power supply on the basis of the traditional UPS power supply in the energy storage industry, the energy storage battery itself serves as a reliable power supply system, has the advantages of large capacity and good low temperature performance, and together with the UPS forms a standby power supply system, plays a double insurance role, and ensures the stability of system power supply, so that the device can ensure that the control system can still work reliably in the case of UPS failure or UPS battery power shortage, start the energy storage system to work in grid-connected or off-grid mode, and improve the reliability and stability of the system.

[0027] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, other parts not specifically described belong to the prior art or common knowledge. Without departing from the principles of the present application, some improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A dual-power supply device, characterized in that: The power supply circuit comprises a power access end, a circuit breaker, an uninterruptible power supply, a switching power supply, a diode and a power supply end connected in sequence. The high-voltage box of the energy storage battery is internally provided with a DC voltage reduction module, a protection circuit, a wiring terminal and an outlet terminal. The DC voltage reduction module reduces the DC high voltage of the battery cluster connected to the wiring terminal to 24V DC voltage, and the output voltage is adjustable. The protection circuit comprises a high-voltage circuit breaker and a fuse connected in series on a DC line, the battery cluster is connected to the DC voltage reduction module through the high-voltage circuit breaker and the fuse, and the DC voltage reduction module is connected to the diode through the outlet terminal. The high-voltage circuit breaker is electrically connected with a switch state detection circuit.

2. The dual path power supply device according to claim 1, wherein The diode is a common double cathode diode.

3. The dual path power supply device of claim 1, wherein, The switch state detection circuit is connected to a battery management system and uploads to a host computer to display the switch state through communication.

4. The dual path power supply of claim 2, wherein, The battery management system is installed in the high-voltage box of the energy storage battery.

5. The dual path power supply of claim 4, wherein, ​

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