A high-voltage energy storage box integrating multiple scenarios

Abstract

This utility model discloses an integrated multi-scenario energy storage high-voltage box, including a box body, a top cover, a mounting plate, a battery-side circuit, and a PCS-side circuit. The top surface of the box body is open, and the top cover is sealed to the box body with screws. The mounting plate is detachably mounted on the bottom surface of the box body, and a circuit breaker is located in the middle of the mounting plate. Battery-side circuit and PCS-side circuit are respectively located on both sides of the circuit breaker. The front side of the box body is a port integration plate, and a manual knob is located in the middle of the port integration plate. The manual knob is connected to the circuit breaker. The battery-side circuit and PCS-side circuit are respectively connected to the circuit breaker from both sides. A battery port is located on one side of the manual knob, and the battery-side circuit is connected to the battery port. A PCS port and a photovoltaic port are respectively located on the other side of the manual knob. The PCS-side circuit is connected to the PCS port, and the photovoltaic port is connected in parallel to the PCS-side circuit. This energy storage high-voltage box has a wider range of application scenarios and has the advantages of safety, high efficiency, and ease of operation and maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, specifically relating to an integrated multi-scenario energy storage high-voltage box. Background Technology

[0002] The high-voltage box for energy storage is a core electrical device in an energy storage system used for centralized management of high-voltage DC or AC power. It is responsible for the high-voltage current collection, electrical protection, energy management, and system communication of the battery clusters, and is a key hub connecting the battery clusters and the PCS (converter). Existing high-voltage boxes for energy storage have the following problems: First, they lack leakage detection, so leakage in the internal circuits cannot be alarmed in time, causing injury to personnel and equipment. Second, when used in high-temperature environments, insufficient internal heat dissipation can easily lead to circuit burning and short circuits, affecting normal operation. Third, the internal components of the high-voltage box are all installed on the bottom surface of the box, and the electrical components are connected one by one, making the disassembly and assembly of electrical components difficult and affecting maintenance operations. Utility Model Content

[0003] To address the aforementioned problems and technical needs, this utility model provides an integrated multi-scenario energy storage high-voltage box. This high-voltage box integrates a photovoltaic port, enabling access to external photovoltaic energy, thus expanding its application scenarios. It is safe, efficient, easy to operate and maintain, and more economical.

[0004] The technical solution of this utility model is as follows: A high-voltage energy storage box integrating multiple scenarios includes a box body, a top cover, a mounting plate, a battery-side circuit, and a PCS-side circuit. The top surface of the box body is open, and the top cover is sealed to the box body with screws. The mounting plate is detachably mounted on the bottom surface of the box body. A circuit breaker is located in the middle of the mounting plate, and battery-side circuits and PCS-side circuits are respectively located on both sides of the circuit breaker. The front side of the box body is a port integration plate, and a manual knob is located in the middle of the port integration plate. The manual knob is connected to the circuit breaker, and the battery-side circuit and PCS-side circuit are respectively connected to the circuit breaker from both sides. A battery port is located on one side of the manual knob, and the battery-side circuit is connected to the battery port. A PCS port and a photovoltaic port are located on the other side of the manual knob, and the PCS-side circuit is connected to the PCS port. The photovoltaic port is connected in parallel to the PCS-side circuit. The battery port is connected to an external DC battery, the PCS port is connected to an external load or power grid, and the photovoltaic port is connected to external photovoltaic power. Through the PCS-side circuit and the battery-side circuit, the photovoltaic power can be converted into DC power and stored in the DC battery, or the photovoltaic power can be inverted into AC power and output to the outside through the PCS port.

[0005] Furthermore, the battery port includes a positive terminal and a negative terminal. The battery-side circuit includes a first conductive strip and a second conductive strip. One end of the first conductive strip is connected to the positive terminal of the battery, and the other end is connected to the upper left side of the circuit breaker. One end of the second conductive strip is connected to the negative terminal of the battery, and the other end is connected to the lower left side of the circuit breaker. A leakage current sensor is installed near the battery port. The leakage current sensor is ring-shaped, and both the first and second conductive strips pass through it. The leakage current sensor can detect leakage. The leakage current sensor allows for real-time monitoring of the circuit's insulation. If an insulation problem occurs, the external control system receives an alarm, and on-site operators can handle the situation promptly, preventing damage to equipment and personnel due to leakage.

[0006] Furthermore, a high-voltage fuse is connected to each of the first and second conductive strips. A baffle fan is installed at the inner corner of the box opposite the battery port, which can simultaneously blow air onto and cool the two high-voltage fuses. The baffle fan enables this high-voltage box to be used in areas with high ambient temperatures, enhances heat dissipation performance, and effectively cools the high-voltage fuses.

[0007] Furthermore, a high-voltage DC relay is also connected to the first and second conductive strips respectively.

[0008] Furthermore, a shunt is provided between the high-voltage DC relay and the high-voltage fuse on the second conductive strip, and a current sensor is provided near the shunt. The current sensor can monitor the current flowing through the shunt.

[0009] Furthermore, the PCS port includes a PCS positive electrode and a PCS negative electrode, the photovoltaic port includes a photovoltaic positive electrode and a photovoltaic negative electrode, the PCS side circuit includes a third conductive strip and a fourth conductive strip, one end of the third conductive strip is connected to the PCS positive electrode and the other end is connected to the upper right side of the circuit breaker, one end of the fourth conductive strip is connected to the PCS negative electrode and the other end is connected to the lower right side of the circuit breaker, the photovoltaic positive electrode is connected to a fifth conductive strip, the other end of the fifth conductive strip is connected to the third conductive strip, the photovoltaic negative electrode is connected to a sixth conductive strip, and the other end of the sixth conductive strip is connected to the fourth conductive strip.

[0010] Furthermore, the conductive strips are all multi-segment connected copper busbars.

[0011] Furthermore, the port integration board is also equipped with power distribution connectors and communication connectors.

[0012] Furthermore, L-shaped plates are symmetrically connected to both sides of the port integration board. The outer edge of the L-shaped plates is provided with a hanging ear groove, and a handle is installed on the L-shaped plates.

[0013] Furthermore, the mounting plate is detachably connected to the bottom surface of the housing, and the circuit breaker, conductive strip, high-voltage DC relay, high-voltage fuse, current sensor, turbulence fan and leakage current sensor are all detachably connected to the mounting plate.

[0014] The beneficial effects of this utility model are:

[0015] 1) The port integration board of this high-voltage box is equipped with a photovoltaic port, which can be connected to external photovoltaic power. In the original circuit, the battery port is connected to the battery cluster. The PCS is connected to the grid through the low-voltage side of the transformer or supplies power to the load through the low-voltage bus when the transformer is off-grid. Normal energy storage can enter from the battery port and exit from the PCS port, and can also enter from the PCS port and exit from the battery port, which is bidirectional storage. The photovoltaic port is connected in parallel to the third and fourth conductive bars of the PCS port through the fifth and sixth conductive bars. Photovoltaic power can flow out from the PCS port through a shorter circuit to supply power to the load, and can also flow out from the battery port through a longer circuit to supply power to the battery cluster. Therefore, its application scenarios are wider, and the modification to the high-voltage box itself is small. It is easy to operate and maintain and has low operating costs.

[0016] 2) The photovoltaic ports are integrated on the port integration board and the current is collected inside the high-voltage box, avoiding the problems of insulation and exposed conductors by collecting current outside the box; the leakage current sensor and the current sensor installed in the box can detect the current flowing through, preventing leakage or current instability and improving the safety of use.

[0017] 3) A removable mounting plate is installed inside the box, and all electrical components can be independently connected to the mounting plate. The components can be disassembled individually, reducing the difficulty of maintenance and repair. Attached Figure Description

[0018] Figure 1 This is an external structural diagram of the energy storage high-voltage box of this utility model;

[0019] Figure 2 The internal structure of the energy storage high-voltage box of this utility model after the top cover is removed. Figure 1 ;

[0020] Figure 3 The internal structure of the energy storage high-voltage box of this utility model after the top cover is removed. Figure 2 ;

[0021] Figure 4 This is a structural diagram of the mounting plate of the energy storage high-voltage box of this utility model;

[0022] The components in the diagram are labeled as follows: Box 1, Top Cover 11, Mounting Plate 2, Circuit Breaker 21, Leakage Current Sensor 22, High Voltage Fuse 23, Turbulence Fan 24, High Voltage DC Relay 25, Shunt 26, Current Sensor 27, Battery Side Circuit 3, First Conductive Strip 31, Second Conductive Strip 32, PCS Side Circuit 4, Third Conductive Strip 41, Fourth Conductive Strip 42, Fifth Conductive Strip 43, Sixth Conductive Strip 44, Port Integration Board 5, Power Distribution Connector 51, Communication Connector 52, L-shaped Plate 53, Hanging Ear Groove 531, Handle 54, Manual Knob 55, Battery Port 6, Battery Positive Terminal 61, Battery Negative Terminal 62, PCS Port 7, PCS Positive Terminal 71, PCS Negative Terminal 72, Photovoltaic Port 8, Photovoltaic Positive Terminal 81, Photovoltaic Negative Terminal 82. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0024] like Figure 1-4 The diagram shows a multi-scenario integrated high-voltage energy storage box according to this utility model, including a box body 1, a top cover 11, a mounting plate 2, a battery-side circuit 3, and a PCS-side circuit 4. The top surface of the box body 1 is open, and the top cover 11 is sealed to the box body 1 by screws. The mounting plate 2 is detachably provided on the bottom surface of the box body 1. A circuit breaker 21 is provided in the middle of the mounting plate 2, and the battery-side circuit 3 and PCS-side circuit 4 are respectively provided on both sides of the circuit breaker 21. The front side of the box body 1 is a port integration plate 5, and a manual knob 55 is provided in the middle of the port integration plate 5. The manual knob 55 is connected to the circuit breaker 21. The battery-side circuit 3 and PCS-side circuit 4 are respectively connected to the circuit breaker 21 from both sides. A battery port 6 is provided on one side of the manual knob 55, and the battery-side circuit is connected to the battery port. A PCS port and a photovoltaic port are respectively provided on the other side of the manual knob. The PCS-side circuit 4 is connected to the PCS port 7, and the photovoltaic port 8 is connected in parallel to the PCS-side circuit 4.

[0025] The battery port 6 includes a positive terminal 61 and a negative terminal 62. The battery-side circuit 3 includes a first conductive strip 31 and a second conductive strip 32. One end of the first conductive strip 31 is connected to the positive terminal 61 of the battery, and the other end is connected to the upper left side of the circuit breaker 21. One end of the second conductive strip 32 is connected to the negative terminal 62 of the battery, and the other end is connected to the lower left side of the circuit breaker 21. A leakage current sensor 22 is provided near the battery port 6. The leakage current sensor 22 is ring-shaped, and both the first conductive strip 31 and the second conductive strip 32 pass through the leakage current sensor 22. The leakage current sensor 22 can detect leakage.

[0026] A high-voltage fuse 23 is connected to the first conductive strip 31 and the second conductive strip 32 respectively. A baffle fan 24 is located at the inner corner of the housing 1 opposite the battery port, simultaneously cooling both high-voltage fuses 23. The baffle fan 24 enables this high-voltage housing to be used in areas with high ambient temperatures, enhancing heat dissipation and effectively cooling the high-voltage fuses. A high-voltage DC relay 25 is also connected to the first conductive strip 31 and the second conductive strip 32 respectively. A shunt 26 is also provided between the high-voltage DC relay 25 on the second conductive strip 32 and the high-voltage fuse 23. A current sensor 27 is located near the shunt 26, monitoring the current flowing through the shunt 26.

[0027] The PCS port 7 includes a PCS positive electrode 71 and a PCS negative electrode 72, the photovoltaic port 8 includes a photovoltaic positive electrode 81 and a photovoltaic negative electrode 82, the PCS side circuit 4 includes a third conductive strip 41 and a fourth conductive strip 42, one end of the third conductive strip 41 is connected to the PCS positive electrode 71, and the other end is connected to the upper right side of the circuit breaker 21, one end of the fourth conductive strip 42 is connected to the PCS negative electrode 72, and the other end is connected to the lower right side of the circuit breaker 21, the photovoltaic positive electrode 81 is connected to the fifth conductive strip 43, and the other end of the fifth conductive strip 43 is connected to the third conductive strip 41, the photovoltaic negative electrode 82 is connected to the sixth conductive strip 44, and the other end of the sixth conductive strip 44 is connected to the fourth conductive strip 42, and all the conductive strips are multi-segment connected copper busbars.

[0028] The battery port is connected to an external DC battery. The PCS port 7 supplies power to the load through the low-voltage bus in the low-voltage side of the transformer or in the off-grid state of the transformer. The photovoltaic port 8 is connected to external photovoltaic power. Through the PCS side circuit 4 and the battery side circuit 3, the photovoltaic power can be converted into DC power and stored in the DC battery, or the photovoltaic power can be inverted into AC power and output to the outside through the PCS port.

[0029] The port integration board 5 is also equipped with a power distribution connector 51 and a communication connector 52. L-shaped plates 53 are symmetrically connected to both sides of the port integration board 5. The outer edge of the L-shaped plates 53 has a hanging ear groove 531, and a handle 54 is installed on the L-shaped plates 53. The mounting plate 2 is detachably connected to the bottom surface of the box 1. The circuit breaker 21, conductive strip, high-voltage DC relay 25, high-voltage fuse 23, current sensor 27, turbulence fan 24, and leakage current sensor 22 are all detachably connected to the mounting plate 2.

[0030] The application principle of this utility model is as follows: Battery port 6 is connected to the battery cluster, and PCS port 7 supplies power to the load through the low-voltage bus in the low-voltage side of the transformer or in the off-grid state of the transformer. Normal energy storage can enter from battery port 6 and exit from PCS port 7, and can also enter from PCS port 7 and exit from battery port 6, which is bidirectional storage. Photovoltaic port 8 is connected in parallel to the third conductive bar 41 and the fourth conductive bar 42 of PCS port 7 through the fifth conductive bar 43 and the sixth conductive bar 44. Photovoltaic power can flow out of the inverter feed grid from PCS port 7 through a shorter circuit, and can also flow out from battery port 6 through a longer circuit to supply power to the battery cluster. Therefore, its application scenarios are wider, and the modification to the high-voltage box itself is smaller. It is easy to operate and maintain and has low operating costs.

[0031] The above descriptions are merely several preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations and substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. An integrated multi-scenario energy storage high-voltage box, characterized in that: The device includes a housing, a top cover, a mounting plate, a battery-side circuit, and a PCS-side circuit. The top surface of the housing is open, and the top cover is sealed to the housing with screws. The mounting plate is detachably mounted on the bottom surface of the housing, with a circuit breaker in the center. Battery-side circuits and PCS-side circuits are located on either side of the circuit breaker. The front side of the housing is a port integration plate with a manual knob in the center. The manual knob is connected to the circuit breaker, and the battery-side circuit and PCS-side circuit are connected to the circuit breaker from both sides. A battery port is located on one side of the manual knob, and the battery-side circuit is connected to the battery port. A PCS port and a photovoltaic port are located on the other side of the manual knob, with the PCS-side circuit connected to the PCS port and the photovoltaic port connected in parallel to the PCS-side circuit. The battery port is connected to an external DC battery, the PCS port is connected to an external load or the power grid, and the photovoltaic port receives external photovoltaic power. Through the PCS-side circuit and the battery-side circuit, the photovoltaic power can be converted into DC power and stored in the DC battery, or the photovoltaic power can be inverted into AC power and output through the PCS port.

2. The integrated multi-scenario high-voltage energy storage box according to claim 1, characterized in that: The battery port includes a positive terminal and a negative terminal. The battery-side circuit includes a first conductive strip and a second conductive strip. One end of the first conductive strip is connected to the positive terminal of the battery, and the other end is connected to the upper left side of the circuit breaker. One end of the second conductive strip is connected to the negative terminal of the battery, and the other end is connected to the lower left side of the circuit breaker. A leakage current sensor is provided near the battery port. The leakage current sensor is ring-shaped, and both the first and second conductive strips pass through the leakage current sensor. The leakage current sensor can detect leakage.

3. The integrated multi-scenario high-voltage energy storage box according to claim 2, characterized in that: A high-voltage fuse is connected to the first and second conductive strips respectively. A turbulence fan is provided in the inner corner of the box opposite to the battery port. The turbulence fan can blow air to cool down the two high-voltage fuses at the same time.

4. The integrated multi-scenario high-voltage energy storage box according to claim 3, characterized in that: A high-voltage DC relay is also connected to the first and second conductive strips respectively.

5. The integrated multi-scenario high-voltage energy storage box according to claim 4, characterized in that: A shunt is also provided between the high-voltage DC relay and the high-voltage fuse on the second conductive strip, and a current sensor is provided near the shunt. The current sensor can monitor the current flowing through the shunt.

6. The integrated multi-scenario high-voltage energy storage box according to claim 5, characterized in that: The PCS port includes a PCS positive electrode and a PCS negative electrode, the photovoltaic port includes a photovoltaic positive electrode and a photovoltaic negative electrode, the PCS side circuit includes a third conductive strip and a fourth conductive strip, one end of the third conductive strip is connected to the PCS positive electrode and the other end is connected to the upper right side of the circuit breaker, one end of the fourth conductive strip is connected to the PCS negative electrode and the other end is connected to the lower right side of the circuit breaker, the photovoltaic positive electrode is connected to the fifth conductive strip and the other end of the fifth conductive strip is connected to the third conductive strip, the photovoltaic negative electrode is connected to the sixth conductive strip and the other end of the sixth conductive strip is connected to the fourth conductive strip.

7. The integrated multi-scenario high-voltage energy storage box according to claim 6, characterized in that: The conductive strips are all multi-segment connected copper busbars.

8. The integrated multi-scenario high-voltage energy storage box according to claim 7, characterized in that: The port integration board is also equipped with power distribution connectors and communication connectors.

9. The integrated multi-scenario high-voltage energy storage box according to claim 8, characterized in that: The port integration board is also symmetrically connected to L-shaped plates on both sides. The outer edge of the L-shaped plates is provided with a hanging ear groove, and a handle is installed on the L-shaped plates.

10. The integrated multi-scenario high-voltage energy storage box according to claim 9, characterized in that: The mounting plate is detachably connected to the bottom of the box. The circuit breaker, conductive strip, high-voltage DC relay, high-voltage fuse, current sensor, turbulence fan and leakage current sensor are all detachably connected to the mounting plate.

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