Energy storage cabinet control structure

Abstract

The utility model discloses an energy storage cabinet control structure, a battery system and an energy storage converter PCS are arranged in an energy storage cabinet, and a control device comprises a control box and an interface box which are arranged above the battery system side by side; a direct-current load switch QF2, main control input joints B + and B-and main control output joints P + and P-are arranged on a panel of the control box; a main positive contactor KM1 and a main negative contactor KM2 are arranged in the control box; the direct current end of the PCS is connected with main control output connectors P + and P-of the main control circuit, the battery system is connected with main control input connectors B + and B-of the main control circuit, the direct current load switch QF2 and a normally open contact of the main contactor are arranged on the main control circuit in series, and an alternating current isolation switch QF1 is arranged on a back plate of the interface box. An alternating current power supply switch QF3 is arranged on the interface box panel; the alternating current end of the energy storage converter PCS and the alternating current power supply switch QF3 are both connected to power grid side alternating current through the alternating current isolation switch QF1, and the alternating current power supply switch QF3 supplies power to auxiliary electric equipment of the energy storage cabinet.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an energy storage cabinet control structure. Background Art

[0002] Energy storage cabinet is a device that can store electrical energy, usually composed of battery packs, converters, control units, etc. It can store electrical energy and release it for power supply when needed, usually used to provide backup power and stabilize grid voltage.

[0003] At present, the control part of the energy storage cabinet is deployed in a box. Since the box for installing the control components is arranged above the battery system, the box is large in size and weight, which is not conducive to installation. In addition, since the battery system is two groups of battery packs arranged vertically in sequence, the control components are concentrated in one box and cannot be set corresponding to the two groups of battery packs to maintain balance. At the same time, the unreasonable deployment of the control components is not conducive to the connection between the control components and the external components of the box, and is not conducive to control operations. Therefore, it is necessary to provide an energy storage cabinet control structure to realize the reasonable split deployment of the control components. Utility Model Content

[0004] The utility model aims at the problems and shortcomings of the prior art and provides a novel energy storage cabinet control structure.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides an energy storage cabinet control structure, in which a battery system and an energy storage converter PCS are arranged, and the energy storage cabinet control structure comprises a control box and an interface box arranged side by side above the battery system, and the energy storage converter PCS is arranged above the control box and the interface box; a DC load switch QF2, a main control input connector B+ and B-, and a main control output connector P+ and P- are arranged on the control box panel; a main positive contactor KM1 and a main negative contactor KM2 are arranged in the control box; the DC end of the energy storage converter PCS is connected to the main control output connector P+ of the main control circuit and P-, the battery system is connected to the main control input connectors B+ and B- of the main control circuit, the DC load switch QF2 and the normally open contact of the main contactor are arranged in series on the main control circuit, an AC isolating switch QF1 is arranged on the back panel of the interface box, and an AC power supply switch QF3 is arranged on the panel of the interface box; the AC end of the energy storage converter PCS and the AC power supply switch QF3 are both connected to the output end of the AC isolating switch QF1, the input end of the AC isolating switch QF1 is connected to the AC power on the grid side, and the AC power supply switch QF3 supplies power to the auxiliary electrical equipment of the energy storage cabinet.

[0007] Preferably, a battery control unit BCU and a BMS control power supply DY1 are also provided in the control box, and a power switch QF5 is also provided on the control box panel; the input end of the BMS control power supply DY1 is connected to the power supply circuit of the power grid cabinet UPS through the power switch QF5, the power supply circuit of the power grid cabinet UPS is connected to the grid-side AC power and the UPS power supply, and the output end of the BMS control power supply DY1 supplies power to the DC24V power supply terminal ID3; the DC24V power supply terminal ID3 supplies power to the battery control unit BCU and the DC24V electrical equipment.

[0008] Preferably, a relay KA3 and a DC / DC power supply DY2 are also provided in the control box, and a start button AN is also provided on the control box panel; the input end of the DC / DC power supply DY2 is connected to the DC load switch QF2 of the main control circuit, and the normally open contact of the relay KA3 is connected in parallel with the normally open contact of the start button AN and then connected to the output end of the DC / DC power supply DY2 and the DC24V power supply terminal ID3; when the start button AN is pressed or the normally open contact of the relay KA3 is closed, the DC / DC power supply DY2 supplies power to the DC24V power supply terminal ID3.

[0009] Preferably, the battery control unit BCU is connected to the coil of the relay KA3 to control the on and off of the normally open contact of the relay KA3.

[0010] Preferably, the battery control unit BCU is connected to the coils of the main positive contactor KM1 and the main negative contactor KM2, and controls the power on and off of the coils of the main positive contactor KM1 and the main negative contactor KM2 to control the on and off of the main control circuit.

[0011] Preferably, the interface box is provided with an I / O module, an industrial computer and a switch, the I / O module, the industrial computer and the switch are all DC24V electrical equipment, the I / O module and the industrial computer are both connected to the switch, and the switch communicates with the host computer; the DC24V power supply terminal ID3 supplies power to the I / O module, the industrial computer and the switch, and the interface box panel is provided with cable interfaces KAM and KDM, the cable interfaces KAM and KDM connect the I / O module and the industrial computer to realize signal input / output and DC24V power supply access.

[0012] Preferably, a plurality of network ports are provided on the interface box panel, and the network ports are connected to a switch. The network ports can be connected to the energy storage converter PCS, the battery control unit BCU or the touch screen via a network cable.

[0013] Preferably, the control box panel is provided with cable interfaces GAM and GBM, and the cable interfaces GAM and GBM are connected to the battery control unit BCU to realize input / output and communication of control signals.

[0014] The positive and progressive effects of the utility model are:

[0015] The energy storage cabinet control structure provided by the utility model includes a control box and an interface box arranged side by side above the battery system. The components involved in the control are mainly deployed in the control box, and the components that need to be connected to the outside are mainly deployed in the interface box, which is beneficial to the control operation and the connection with the outside; reasonable split deployment is beneficial to the installation of the control box and the interface box.

[0016] Furthermore, a BMS control power supply DY1 is provided to supply power to the DC24V power supply terminal ID3. The input end of the BMS control power supply DY1 is connected to the power supply circuit of the power grid cabinet UPS through the power switch QF5. The power supply circuit of the power grid cabinet UPS is connected to the AC power on the grid side and the UPS power supply. The DC24V power supply terminal ID3 supplies power to the battery control unit BCU and DC24V electrical equipment.

[0017] Furthermore, a DC / DC power supply DY2 connected to the energy storage cabinet battery system is provided; the connection and disconnection between the DC / DC power supply DY2 and the DC24V power supply terminal ID3 are controlled by the start button AN and the relay KA3; when the AC power on the grid side is cut off, the start button AN is pressed, and the DC / DC power supply DY2 is connected to the DC24V power supply terminal ID3 to supply power to the battery control unit BCU; the battery control unit BCU detects that the normally open contact of the start button AN is closed, controls the relay KA3 coil to be energized, and the DC / DC power supply DY2 supplies stable power to the battery control unit BCU and the DC24V electrical equipment; enables the I / O module, the industrial computer and the switch to be powered and work, and maintain the connection with the host computer; when the AC power on the grid side is restored, the battery control unit BCU controls the relay KA3 coil to lose power, and the relay KA3 normally open contact is opened; the DC / DC power supply DY2 stops supplying power to the DC24V power supply terminal ID3 and switches back to being powered by the AC power on the grid side. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a layout diagram of an energy storage cabinet according to an embodiment of the utility model;

[0019] Figure 2 This is a layout diagram of a control box panel of an embodiment of the utility model;

[0020] Figure 3 This is a panel layout diagram of an interface box according to an embodiment of the present utility model;

[0021] Figure 4This is a layout diagram of the back panel of the interface box of an embodiment of the utility model;

[0022] Figure 5 This is a power supply circuit diagram of the energy storage cabinet in an embodiment of the utility model;

[0023] Figure 6 This is a control circuit diagram of the energy storage cabinet of an embodiment of the utility model;

[0024] Figure 7 This is a schematic diagram of the connection of DC24V electrical equipment in the energy storage cabinet of an embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 7 This embodiment provides a control structure of an energy storage cabinet.

[0027] The energy storage cabinet is provided with a battery system and an energy storage converter PCS. The energy storage cabinet control structure includes a control box and an interface box arranged side by side above the battery system. The energy storage converter PCS is arranged above the control box and the interface box. The control box panel is provided with a DC load switch QF2, a main control input connector B+ and B-, and a main control output connector P+ and P-. The control box is provided with a main positive contactor KM1 and a main negative contactor KM2. The DC end of the energy storage converter PCS is connected to the main control output connectors P+ and P- of the main control circuit. The system is connected to the main control input connectors B+ and B- of the main control circuit. The DC load switch QF2 and the normally open contacts of the main contactor are arranged in series on the main control circuit. An AC isolating switch QF1 is arranged on the back panel of the interface box, and an AC power supply switch QF3 is arranged on the panel of the interface box. The AC end of the energy storage inverter PCS and the AC power supply switch QF3 are both connected to the output end of the AC isolating switch QF1, and the input end of the AC isolating switch QF1 is connected to the AC power on the grid side. The AC power supply switch QF3 supplies power to the auxiliary electrical equipment of the energy storage cabinet.

[0028] In some embodiments, a battery control unit BCU and a BMS control power supply DY1 are also provided in the control box, and a power switch QF5 is also provided on the control box panel; the input end of the BMS control power supply DY1 is connected to the power supply circuit of the grid-connected cabinet UPS through the power switch QF5, the power supply circuit of the grid-connected cabinet UPS is connected to the grid-side AC power and the UPS power supply, and the output end of the BMS control power supply DY1 supplies power to the DC24V power supply terminal ID3; the DC24V power supply terminal ID3 supplies power to the battery control unit BCU and the DC24V electrical equipment.

[0029] In some embodiments, the battery control unit BCU connects the coils of the main positive contactor KM1 and the main negative contactor KM2, controls the power on and off of the coils of the main positive contactor KM1 and the main negative contactor KM2, and controls the on and off of the main control circuit.

[0030] When AC power is supplied from the grid side, the AC isolation switch QF1, DC load switch QF2, AC power switch QF3 and power switch QF5 are all in the closed state; the AC power from the grid side is connected to the power supply circuit of the power cabinet UPS, and supplies power to the DC24V power supply terminal ID3 through the BMS control power supply DY1, and then supplies power to the battery control unit BCU and DC24V electrical equipment. The battery control unit BCU controls the coils of the main positive contactor KM1 and the main negative contactor KM2 to be energized, so that the normally open contacts of the main positive contactor KM1 and the main negative contactor KM2 are closed, and the main control circuit is in the connected state. At this time, the AC power from the grid side supplies power to the energy storage inverter PCS, and the energy storage inverter PCS starts to convert AC power into DC power to charge the battery system.

[0031] In some embodiments, a relay KA3 and a DC / DC power supply DY2 are also provided in the control box, and a start button AN is also provided on the control box panel; the input end of the DC / DC power supply DY2 is connected to the DC load switch QF2 of the main control circuit, and the normally open contact of the relay KA3 is connected in parallel with the normally open contact of the start button AN and then connected to the output end of the DC / DC power supply DY2 and the DC24V power supply terminal ID3; when the start button AN is pressed or the normally open contact of the relay KA3 is closed, the DC / DC power supply DY2 supplies power to the DC24V power supply terminal ID3.

[0032] In some embodiments, the battery control unit BCU is connected to the coil of the relay KA3 to control the on and off of the normally open contact of the relay KA3.

[0033] When the AC power is cut off on the grid side, the DC load switch QF2 is closed, the DC / DC power supply DY2 is connected to the battery system to be powered, and the start button AN is pressed. The DC / DC power supply DY2 is connected to the DC24V power supply terminal ID3 to supply power to the battery control unit BCU. The battery control unit BCU detects that the normally open contact of the start button AN is closed, and the control relay KA3 coil is energized. The normally open contact of the relay KA3 is closed, and the DC / DC power supply DY2 is stably connected to the DC24V power supply terminal ID3 to supply power to the battery control unit BCU and the DC24V electrical equipment. At this time, the start button AN can be released; the battery control unit BCU controls the coils of the main positive contactor KM1 and the main negative contactor KM2 to be energized, so that the normally open contacts of the main positive contactor KM1 and the main negative contactor KM2 are closed, and the main control circuit is in a connected state. At this time, the battery system in the energy storage cabinet supplies power to the energy storage converter PCS, and the energy storage converter PCS starts to convert DC power into AC power to supply power to the AC power load.

[0034] When the AC power on the grid side is restored or the battery system is in an unavailable state, the battery control unit BCU controls the relay KA3 coil to lose power, the normally open contact of relay KA3 opens, the DC / DC power supply DY2 stops supplying power to the DC24V power supply terminal ID3, and switches back to the AC power on the grid side.

[0035] In some embodiments, the main control input connector B+, fuse FU, DC load switch QF2, the normally open contact of the main positive contactor KM1 and the main control output connector P+ are connected in sequence; the main control input connector B-, DC load switch QF2, current sensor, the normally open contact of the main negative contactor KM2 and the main control output connector P- are connected in sequence; the battery control unit BCU is connected to the current sensor to collect the current value of the main control circuit as the current value of the battery system, and the battery control unit BCU is connected to the main control circuit to collect the voltage value of the main control circuit as the voltage value of the battery system; the battery control unit BCU calculates the state of the battery system according to the current value and voltage value of the battery system.

[0036] In some embodiments, an I / O module, an industrial computer and a switch are provided in the interface box. The I / O module, the industrial computer and the switch are all DC24V power-consuming devices. The I / O module and the industrial computer are both connected to the switch, and the switch communicates with the host computer. The DC24V power supply terminal ID3 supplies power to the I / O module, the industrial computer and the switch. Cable interfaces KAM and KDM are provided on the interface box panel. The cable interfaces KAM and KDM connect the I / O module and the industrial computer to realize signal input / output and DC24V power supply access.

[0037] In some embodiments, a plurality of network ports are provided on the interface box panel, the network ports are connected to a switch, and the network ports can be connected to the energy storage inverter PCS, the battery control unit BCU or the touch screen via a network cable.

[0038] In some embodiments, cable interfaces GAM and GBM are provided on the control box panel, and the cable interfaces GAM and GBM are connected to the battery control unit BCU to realize input / output and communication of control signals.

[0039] In some embodiments, a network port COM is also provided on the control box panel, and the battery control unit BCU is connected to the network port COM and communicates with the switch through the network port COM.

[0040] In summary, the energy storage cabinet control structure provided by the utility model includes a control box and an interface box arranged side by side above the battery system. The components involved in the control are mainly deployed in the control box, and the components that need to be connected to the outside are mainly deployed in the interface box, which is beneficial to the control operation and the connection with the outside; reasonable split deployment is beneficial to the installation of the control box and the interface box.

[0041] Furthermore, a BMS control power supply DY1 is provided to supply power to the DC24V power supply terminal ID3. The input end of the BMS control power supply DY1 is connected to the power supply circuit of the power grid cabinet UPS through the power switch QF5. The power supply circuit of the power grid cabinet UPS is connected to the AC power on the grid side and the UPS power supply. The DC24V power supply terminal ID3 supplies power to the battery control unit BCU and DC24V electrical equipment.

[0042] Furthermore, a DC / DC power supply DY2 connected to the energy storage cabinet battery system is provided; the connection and disconnection between the DC / DC power supply DY2 and the DC24V power supply terminal ID3 are controlled by the start button AN and the relay KA3; when the AC power on the grid side is cut off, the start button AN is pressed, and the DC / DC power supply DY2 is connected to the DC24V power supply terminal ID3 to supply power to the battery control unit BCU; the battery control unit BCU detects that the normally open contact of the start button AN is closed, controls the relay KA3 coil to be energized, and the DC / DC power supply DY2 supplies stable power to the battery control unit BCU and the DC24V electrical equipment; enables the I / O module, the industrial computer and the switch to be powered and work, and maintains the connection with the host computer; when the AC power on the grid side is restored, the battery control unit BCU controls the relay KA3 coil to lose power, and the relay KA3 normally open contact is opened; the DC / DC power supply DY2 stops supplying power to the DC24V power supply terminal ID3 and switches back to being powered by the AC power on the grid side.

[0043] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. An energy storage cabinet control structure, characterized in that: The energy storage cabinet is provided with a battery system and an energy storage converter PCS. The energy storage cabinet control structure includes a control box and an interface box arranged side by side above the battery system. The energy storage converter PCS is arranged above the control box and the interface box. The control box panel is provided with a DC load switch QF2, a main control input connector B+ and B-, and a main control output connector P+ and P-. The control box is provided with a main positive contactor KM1 and a main negative contactor KM2. The DC end of the energy storage converter PCS is connected to the main control output connectors P+ and P- of the main control circuit. The system is connected to the main control input connectors B+ and B- of the main control circuit, the DC load switch QF2 and the normally open contacts of the main contactor are arranged in series on the main control circuit, an AC isolating switch QF1 is arranged on the back panel of the interface box, and an AC power supply switch QF3 is arranged on the panel of the interface box; the AC end of the energy storage inverter PCS and the AC power supply switch QF3 are both connected to the output end of the AC isolating switch QF1, the input end of the AC isolating switch QF1 is connected to the AC power on the grid side, and the AC power supply switch QF3 supplies power to the auxiliary electrical equipment of the energy storage cabinet.

2. The energy storage cabinet control structure according to claim 1, characterized in that: A battery control unit BCU and a BMS control power supply DY1 are also provided in the control box, and a power switch QF5 is also provided on the control box panel; the input end of the BMS control power supply DY1 is connected to the power supply circuit of the power grid cabinet UPS through the power switch QF5, the power supply circuit of the power grid cabinet UPS is connected to the grid-side AC power and the UPS power supply, and the output end of the BMS control power supply DY1 supplies power to the DC24V power supply terminal ID3; the DC24V power supply terminal ID3 supplies power to the battery control unit BCU and the DC24V electrical equipment.

3. The energy storage cabinet control structure according to claim 2, characterized in that: The control box is also provided with a relay KA3 and a DC / DC power supply DY2, and a start button AN is also provided on the control box panel; the input end of the DC / DC power supply DY2 is connected to the DC load switch QF2 of the main control circuit, and the normally open contact of the relay KA3 is connected in parallel with the normally open contact of the start button AN and then connected to the output end of the DC / DC power supply DY2 and the DC24V power supply terminal ID3; when the start button AN is pressed or the normally open contact of the relay KA3 is closed, the DC / DC power supply DY2 supplies power to the DC24V power supply terminal ID3.

4. The energy storage cabinet control structure according to claim 3, characterized in that: The battery control unit BCU is connected to the coil of the relay KA3 to control the on and off of the normally open contact of the relay KA3.

5. The energy storage cabinet control structure according to claim 2, characterized in that: The battery control unit BCU is connected to the coils of the main positive contactor KM1 and the main negative contactor KM2, and controls the power on and off of the coils of the main positive contactor KM1 and the main negative contactor KM2 to control the on and off of the main control circuit.

6. The energy storage cabinet control structure according to claim 2, characterized in that: An I / O module, an industrial computer and a switch are arranged in the interface box. The I / O module, the industrial computer and the switch are all DC24V electrical equipment. The I / O module and the industrial computer are both connected to the switch, and the switch communicates with the host computer; the DC24V power supply terminal ID3 supplies power to the I / O module, the industrial computer and the switch. Cable interfaces KAM and KDM are arranged on the panel of the interface box. The cable interfaces KAM and KDM connect the I / O module and the industrial computer to realize signal input / output and access to the DC24V power supply.

7. The energy storage cabinet control structure according to claim 6, characterized in that: The interface box panel is provided with a plurality of network ports, the network ports are connected to a switch, and the network ports can be connected to the energy storage converter PCS, the battery control unit BCU or the touch screen via a network cable.

8. The energy storage cabinet control structure according to claim 2, characterized in that: The control box panel is provided with cable interfaces GAM and GBM, and the cable interfaces GAM and GBM are connected to the battery control unit BCU to realize input / output and communication of control signals.

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