AC / DC hybrid power supply energy storage high-voltage box

Abstract

The utility model discloses an AC / DC hybrid power supply energy storage high-voltage box, which comprises a high-voltage box main loop, a BMS secondary loop, a DC circuit breaker with a shunt trip coil, switching power supplies PW1 and PW2, and a diode. A direct-current circuit breaker is connected in a line between the battery and the high-voltage box main loop and the BMS secondary loop; the direct-current circuit breaker is respectively connected with the PW1 and a master control DO port of the high-voltage box main loop and the BMS secondary loop; the PW1 carries out voltage reduction on high-voltage direct current input by a battery and converts the high-voltage direct current into 24V to be output, the PW2 rectifies 220V alternating current output by a confluence cabinet into 24V direct current to be output, and 24V direct current output ports of the PW1 and the PW2 are respectively connected with a diode. According to the utility model, the problem of power shortage of a battery caused by self-consumption of direct-current power taking is solved, alternating-current power taking is fused, a secondary control power supply adopts multi-path power supply, the system operation is not influenced when any power supply stops supplying power, and the stability of the system is ensured.

Description

Technical Field

[0001] The utility model relates to an energy storage high-voltage box with AC and DC hybrid power supply. Background Art

[0002] The existing energy storage high-voltage box BMS and secondary control power supply source is mainly external UPS AC 220V or battery system self-powered to power the high-voltage box BMS and secondary control, and all of them adopt a single-sided power supply method, which can only supply power on either side, which is extremely inconvenient to use. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an AC / DC hybrid power supply system, which not only solves the problem of battery depletion caused by DC power self-consumption, but also integrates AC power supply, so that the secondary control power supply adopts multi-channel power supply, and any power supply stops supplying power without affecting the system operation, thereby ensuring the stability of the system.

[0004] The purpose of the utility model is achieved through the following technical solutions: an AC / DC hybrid power supply energy storage high-voltage box, including a high-voltage box main circuit and a BMS secondary circuit, a DC circuit breaker with a shunt trip coil, switching power supplies PW1 and PW2, and a diode;

[0005] The main circuit of the high-voltage box and the secondary circuit of the BMS are respectively connected to the external battery and the combiner cabinet containing the 220V power supply. A DC circuit breaker with a shunt trip coil is connected in the line between the battery and the main circuit of the high-voltage box and the secondary circuit of the BMS. The DC circuit breaker is respectively connected to the switching power supply PW1 and the main control DO port of the main circuit of the high-voltage box and the secondary circuit of the BMS;

[0006] The switching power supply PW1 steps down the high-voltage DC power input from the battery to a 24V output. The output port of the switching power supply PW1 is connected to the 24V power supply terminal of the main circuit of the high-voltage box and the secondary circuit of the BMS;

[0007] The switching power supply PW2 rectifies the 220V AC power output by the combiner cabinet into a 24V DC output. The output port of the switching power supply PW2 is connected to the 24V power supply terminal of the main circuit of the high-voltage box and the secondary circuit of the BMS;

[0008] Connect a diode to the 24V DC output port of the switching power supply PW1 and the switching power supply PW2 respectively;

[0009] A shunt tripping coil is connected between the DC circuit breaker and the main control DO port of the high-voltage box main circuit and the BMS secondary circuit.

[0010] The beneficial effects of the utility model are as follows: the AC / DC hybrid power supply system provided by the utility model not only solves the problem of battery depletion caused by DC power self-consumption, but also integrates AC power supply, so that the secondary control power supply adopts multi-circuit power supply, and any power supply stops supplying power without affecting the operation of the system, thus ensuring the stability of the system. At the same time, the utility model does not need to change the structure of the main circuit of the high-voltage box and the secondary circuit of the BMS, but only needs to add switching power supplies, diodes, circuit breakers and other equipment to the power supply circuit to achieve AC / DC hybrid power supply, with a simple circuit structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the AC / DC hybrid power supply energy storage high-voltage box of the utility model. DETAILED DESCRIPTION

[0012] The technical solution of the utility model is further explained below in conjunction with the accompanying drawings.

[0013] like Figure 1 As shown, the utility model is an AC / DC hybrid power supply energy storage high-voltage box, including a high-voltage box main circuit and a BMS secondary circuit, a DC circuit breaker Q1.0 with a shunt trip coil, switching power supplies PW1 and PW2, and a diode;

[0014] The main circuit of the high-voltage box and the secondary circuit of the BMS are respectively connected to the external battery and the junction box containing a 220V power supply. A DC circuit breaker with a shunt trip coil is connected in the line between the battery and the main circuit of the high-voltage box and the secondary circuit of the BMS. The DC circuit breaker is respectively connected to the switching power supply PW1 and the main control DO port of the main circuit of the high-voltage box and the secondary circuit of the BMS; the shunt trip coil of the DC circuit breaker is controlled by the secondary circuit of the BMS, and the battery power is collected by the sampling and measuring device of the BMS. When the battery power is insufficient, the shunt trip coil DC circuit breaker is controlled by the BMS, thereby cutting off the input function of PW1.

[0015] The switching power supply PW1 steps down the high-voltage DC power input from the battery to a 24V output. The output port of the switching power supply PW1 is connected to the 24V power supply terminal of the main circuit of the high-voltage box and the secondary circuit of the BMS;

[0016] The switching power supply PW2 rectifies the 220V AC power output by the combiner cabinet into a 24V DC output. The output port of the switching power supply PW2 is connected to the 24V power supply terminal of the main circuit of the high-voltage box and the secondary circuit of the BMS;

[0017] A diode is connected to the 24V DC output port of the switching power supply PW1 and the switching power supply PW2 respectively to prevent reverse flow, so that PW1 and PW2 will not have current backflow to any switching power supply due to the potential difference. The diode is connected to the positive (24V+) end of the 24V DC output port, and the positive (24V+) end of PW1 and PW2 output from the rear end of the diode is connected in parallel, and the negative (24V-) end is connected in parallel, and then connected to the positive and negative ports of the high-voltage box main circuit and the BMS secondary circuit respectively.

[0018] If the system AC power is disconnected and the system is not running for a long time and is in the process of protecting the battery system, the BMS can control the Q1.0 shunt trip coil through the output so that PW1 will not continue to consume the power of the battery system, thereby preventing the battery system from running out of power.

[0019] The utility model adopts the method of adding diodes for reverse protection (using the single-phase conduction and reverse cutoff characteristics of the diode) to the DC output 24V+ ports of the DC / DC power supply (PW1) and the AC / DC power supply (PW2), so that the current of PW1 and PW2 will not flow back to either side of the power supply due to the potential difference, thereby achieving the simultaneous AC and DC mixed power supply of the high-voltage box and ensuring the stability of operation.

[0020] The AC / DC hybrid power supply system provided by the utility model not only solves the problem of battery depletion caused by self-consumption of DC power, but also integrates AC power supply, so that the secondary control power supply adopts multi-channel power supply. If any power supply stops supplying power, it will not affect the operation of the system, thus ensuring the stability of the system.

[0021] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations based on the technical inspirations disclosed in the present invention without departing from the essence of the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. An AC / DC hybrid power supply energy storage high voltage box, characterized in that: It includes the main circuit of the high-voltage box and the secondary circuit of the BMS, a DC circuit breaker with a shunt trip coil, switching power supplies PW1 and PW2, and a diode; The main circuit of the high-voltage box and the secondary circuit of the BMS are respectively connected to the external battery and the combiner cabinet containing the 220V power supply. A DC circuit breaker with a shunt trip coil is connected in the line between the battery and the main circuit of the high-voltage box and the secondary circuit of the BMS. The DC circuit breaker is respectively connected to the switching power supply PW1 and the main control DO port of the main circuit of the high-voltage box and the secondary circuit of the BMS; The switching power supply PW1 steps down the high-voltage DC power input from the battery to a 24V output. The output port of the switching power supply PW1 is connected to the 24V power supply terminal of the main circuit of the high-voltage box and the secondary circuit of the BMS; The switching power supply PW2 rectifies the 220V AC power output by the combiner cabinet into a 24V DC output. The output port of the switching power supply PW2 is connected to the 24V power supply terminal of the main circuit of the high-voltage box and the secondary circuit of the BMS; A diode is connected to each of the 24V DC output ports of the switching power supply PW1 and the switching power supply PW2.

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