Energy storage high-voltage box convergence cabinet

Abstract

The utility model provides an energy storage high-voltage box confluence cabinet, comprising a cabinet body, a plurality of high-voltage boxes, a confluence assembly, a protection member and a lightning protection assembly, the plurality of high-voltage boxes are arranged in the cabinet body, and the positive and negative input ends of the plurality of high-voltage boxes are respectively and electrically connected with the positive and negative output ends of corresponding energy storage batteries; the protection part is arranged in the cabinet body, the positive and negative output ends of the plurality of high-voltage boxes are electrically connected with the positive and negative input ends of the protection part through the convergence assembly, and the positive and negative output ends of the protection part are correspondingly and electrically connected with the positive and negative input ends of the energy storage converter respectively; the lightning protection assembly is arranged in the cabinet body, the positive input end and the negative input end of the lightning protection assembly are correspondingly and electrically connected with the positive output end and the negative output end of the protection piece respectively, and the grounding end of the lightning protection assembly is grounded. And the damage to equipment on the line caused by sudden generation of peak current or voltage on the line is avoided, and the safety performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to an energy storage high-voltage box combiner cabinet. Background Art

[0002] The energy storage high-voltage box combiner is a device used to concentrate and distribute electrical energy. It is usually used in energy storage systems. Its main function is to bring together the electrical energy of multiple battery packs or other power sources and distribute it to loads or other equipment.

[0003] An energy storage junction cabinet with publication number CN215185224U includes a box body, a cabinet door is arranged on one side of the box body, a primary management unit is arranged on the cabinet door, a supporting insulating plate is arranged inside the box body, a power-off protector is arranged on the top, a secondary management unit is arranged below the power-off protector, a switch, a protection component group and a relay group are arranged below the secondary management unit, a junction connection unit is arranged at the lower part of the box body, the positive pole of the access port is connected to the fuse, the negative pole is connected to the shunt, the fuse and the shunt are connected together to the protection component and then to the access port.

[0004] The current energy storage combiner combines the traditional high-voltage box and the combiner into a new type of combiner. However, the new type of combiner still has certain safety hazards. There is no corresponding lightning protection design. When transient voltage appears in the line, it will cause damage to the equipment on the entire line, thereby reducing safety performance. Utility Model Content

[0005] In view of this, the utility model proposes an energy storage high-voltage box combiner cabinet, which not only combines the high-voltage box and the combiner cabinet into a whole, but also provides a corresponding lightning protection design in the combiner cabinet to prevent sudden peak current or voltage on the line from damaging the equipment on the line, thereby improving safety performance.

[0006] The technical solution of the utility model is implemented as follows: The utility model provides an energy storage high-voltage box combiner cabinet, including a cabinet body, a plurality of high-voltage boxes, a combiner assembly, a protective component and a lightning protection assembly, wherein:

[0007] The multiple high-voltage boxes are all arranged in the cabinet, and the positive and negative input terminals of the multiple high-voltage boxes are respectively electrically connected to the positive and negative output terminals of the corresponding energy storage batteries;

[0008] The protection component is arranged in the cabinet, and the positive and negative output terminals of the plurality of high-voltage boxes are electrically connected to the positive and negative input terminals of the protection component through the busbar assembly, and the positive and negative output terminals of the protection component are electrically connected to the positive and negative input terminals of the energy storage converter respectively;

[0009] The lightning protection component is arranged in the cabinet, and the positive and negative input terminals of the lightning protection component are respectively electrically connected to the positive and negative output terminals of the protection component, and the grounding terminal of the lightning protection component is grounded.

[0010] On the basis of the above technical solution, preferably, the high-voltage box includes a relay switch, a shunt, a first relay, a first fuse, a second relay, a third relay and a pre-charging resistor, wherein the positive and negative output ends of the energy storage battery are electrically connected to the positive and negative input ends of the relay switch respectively, the negative output end of the relay switch is electrically connected to one end of the shunt, the other end of the shunt is electrically connected to one end of the contact of the first relay, the other end contact of the first relay is electrically connected to the negative output end of the high-voltage box, the positive output end of the relay switch is electrically connected to one end of the first fuse, the other end of the first fuse is electrically connected to one end of the contact of the second relay and one end of the contact of the third relay respectively, the other end of the contact of the third relay is electrically connected to the pre-charging resistor, the other end of the pre-charging resistor is electrically connected to the other end of the contact of the second relay, and is commonly connected to the positive output end of the high-voltage box, and the coils of the first relay, the second relay and the third relay are all electrically connected to the output end of the BMS battery management system.

[0011] On the basis of the above technical solution, preferably, the multiple high-voltage boxes are all arranged close to one side of the cabinet, and the multiple high-voltage boxes are stacked and distributed along the vertical extension direction of the cabinet.

[0012] On the basis of the above technical solution, preferably, the bus assembly includes a main positive bus, a plurality of branch positive buss, a main negative bus and a plurality of branch negative buss, wherein:

[0013] The main positive bus is electrically connected to the positive input end of the protection element, the other end of the main positive bus is electrically connected to the multiple branch positive buss, and the other ends of the multiple branch positive buss are electrically connected to the positive output ends of each high-voltage box respectively;

[0014] The main negative bus is electrically connected to the negative input terminal of the protection element, the other end of the main negative bus is electrically connected to the multiple branch negative busses, and the other ends of the multiple branch negative busses are electrically connected to the negative output terminals of each high-voltage box.

[0015] On the basis of the above technical solution, preferably, the main positive bus and the main negative bus are arranged at intervals, and the distance between the two is not less than 25CM.

[0016] On the basis of the above technical solution, preferably, the lightning protection component includes two fusible fuses and an AC lightning arrester, wherein the positive and negative output ends of the protective component are electrically connected to one end of each fusible fuse, respectively, the other ends of the two fusible fuses are electrically connected to the positive and negative input ends of the AC lightning arrester, respectively, and the grounding end of the AC lightning arrester is electrically connected to the grounding embedded component.

[0017] On the basis of the above technical solution, preferably, a fuse is also included, wherein the positive output end of the protection element is electrically connected to one end of the fuse, the other end of the fuse is electrically connected to the positive input end of the energy storage inverter, and the negative output end of the protection element is electrically connected to the negative input end of the energy storage inverter.

[0018] On the basis of the above technical solution, preferably, a window is provided on one side of the cabinet close to the high-voltage box, and the position of the window corresponds to the positive input terminal and the negative input terminal of the high-voltage box, so as to facilitate the connection between the energy storage battery and the high-voltage box.

[0019] On the basis of the above technical solution, preferably, a heat dissipation fan is further included, which is arranged on a side of the cabinet away from the ground, and an air outlet of the heat dissipation fan corresponds to the position of the protective component, so as to dissipate heat inside the cabinet.

[0020] On the basis of the above technical solution, preferably, the protective component is a molded case frame circuit breaker.

[0021] The energy storage high-voltage box combiner cabinet of the utility model has the following beneficial effects compared with the prior art:

[0022] (1) By integrating multiple high-voltage boxes into the cabinet, and connecting the multiple high-voltage boxes with the protection components through the busbar assembly, the positive and negative output ends of the multiple high-voltage boxes are respectively connected to the main positive circuit and the main negative circuit, and lightning protection components are arranged on the positive and negative circuits. The lightning protection components can conduct the shunt in a very short time, play the role of current discharge and voltage limiting, prevent excessive current and voltage from damaging the equipment, and thus improve safety performance;

[0023] (2) The pre-charging resistance can be set to limit the charging current of the energy storage box in the pre-charging stage, so that the capacitor voltage in the system increases slowly, reducing the impact on the capacitor and avoiding arcing or overcurrent caused by excessive current, thereby protecting the safe operation of the battery and power system;

[0024] (3) By arranging the main positive bus and the main negative bus at intervals, coupling or interference caused by the influence of magnetic or electric fields can be avoided, thereby reducing interference between lines. This design helps to reduce the range of danger that may occur when a fault occurs, thereby improving the safety of the system;

[0025] (4) By setting a heat dissipation fan and ventilation windows in the cabinet, the heat generated by the components in the cabinet during use can be circulated to the outside of the cabinet, thereby achieving a heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a three-dimensional diagram of the energy storage high-voltage box combiner cabinet of the utility model;

[0028] Figure 2 This is a circuit schematic diagram of the energy storage high-voltage box combiner cabinet of the utility model;

[0029] Figure 3 This is a schematic diagram of the high-voltage box circuit of the energy storage high-voltage box combiner cabinet of the utility model. DETAILED DESCRIPTION

[0030] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] like Figure 1-3 As shown, an energy storage high-voltage box junction cabinet of the utility model includes a cabinet 1, multiple high-voltage boxes 2, a junction component 3, a protective component 4 and a lightning protection component 5, wherein the multiple high-voltage boxes 2 are arranged in the cabinet 1, and the positive and negative input terminals of the multiple high-voltage boxes 2 are respectively electrically connected to the corresponding positive and negative output terminals of the energy storage batteries; the protective component 4 is arranged in the cabinet 1, and the positive and negative output terminals of the multiple high-voltage boxes 2 are electrically connected to the positive and negative input terminals of the protective component 4 through the junction component 3, and the positive and negative output terminals of the protective component 4 are respectively electrically connected to the positive and negative input terminals of the energy storage inverter; the lightning protection component 5 is arranged in the cabinet 1, and the positive and negative input terminals of the lightning protection component 5 are respectively electrically connected to the positive and negative output terminals of the protective component 4, and the grounding terminal of the lightning protection component 5 is grounded.

[0032] It should be noted that, currently, the high-voltage box and the junction cabinet are usually designed separately on the market, which has the problems of low integration, low space utilization and large floor space. In this embodiment, multiple high-voltage boxes 2 are integrated into the cabinet 1, and the multiple high-voltage boxes 2 are connected to the protective component 4 through the junction component 3 to play a junction role, so that the components in the high-voltage box and the junction cabinet are integrated into one, which can optimize the spatial layout and change the wiring method, while reducing costs and effectively utilizing the internal space; and, the positive output end of the protective component 4 is connected to the main positive circuit, and the negative output end of the protective component 4 is connected to the main negative circuit, and a lightning protection component 5 is also provided on the positive and negative circuits led out of the protective component 4. When a peak current or voltage suddenly occurs on the line, the lightning protection component 5 can be turned on and shunted in a very short time, which has the effect of current discharge and voltage limiting, preventing excessive current and voltage from damaging the equipment, thereby improving safety performance.

[0033] Specifically, the protection component 4 in this embodiment is a molded case frame circuit breaker.

[0034] As a preferred embodiment, the high-voltage box 2 in this embodiment includes a relay switch 21, a shunt 22, a first relay 23, a first fuse 24, a second relay 25, a third relay 26 and a pre-charging resistor 27, wherein the positive and negative output ends of the energy storage battery are electrically connected to the positive and negative input ends of the relay switch 21, respectively, the negative output end of the relay switch 21 is electrically connected to one end of the shunt 22, the other end of the shunt 22 is electrically connected to one end of the contact of the first relay 23, and the other end of the contact of the first relay 23 is electrically connected to the negative output end of the high-voltage box 2. The positive output end of the relay switch 21 is electrically connected to one end of the first fuse 24, the other end of the first fuse 24 is electrically connected to one end of the contact of the second relay 25 and one end of the contact of the third relay 26 respectively, the other end of the contact of the third relay 26 is electrically connected to the pre-charging resistor 27, the other end of the pre-charging resistor 27 is electrically connected to the other end of the contact of the second relay 25, and they are commonly connected to the positive output end of the high-voltage box 2, and the coils of the first relay 23, the second relay 25 and the third relay 26 are all electrically connected to the output end of the BMS battery management system.

[0035] It should be noted that the positive and negative output ends of the energy storage battery are connected to the high-voltage box 2. First, the BMS battery management system sends a control signal to the first relay 23 and the third relay 26 to power on the coils of the first relay 23 and the third relay 26. After the coils of the first relay 23 and the third relay 26 are powered, the corresponding contacts are closed to close the main negative circuit and the pre-charging circuit, and the energy storage battery is pre-charged. During the pre-charging process, the charging current of the energy storage box in the pre-charging stage can be limited by the set pre-charging resistor 27, so that the capacitor voltage in the system is slowly increased, the impact on the capacitor is reduced, and the arc or overcurrent is avoided when the current is too large, thereby protecting the safe operation of the battery and the power system. When a stable charging current is reached, the BMS battery management system sends a control signal to the second relay 25 and the third relay 26 to control the coil of the third relay 26 to lose power, thereby disconnecting the pre-charging circuit, controlling the coil of the second relay 25 to power on, closing the main positive circuit, and then charging the energy storage battery normally.

[0036] The multiple high-voltage boxes 2 in this embodiment are all arranged close to one side of the cabinet 1 , and the multiple high-voltage boxes 2 are stacked and distributed along the vertical extension direction of the cabinet 1 .

[0037] In this embodiment, a window 100 is provided on one side of the cabinet 1 close to the high-voltage box 2 . The position of the window 100 corresponds to the positive input terminal and the negative input terminal of the high-voltage box 2 , so as to facilitate the connection between the energy storage battery and the high-voltage box 2 .

[0038] It should be noted that the vertical stacking arrangement of multiple high-voltage boxes 2 in the present embodiment can save the occupied space in the cabinet 1 and improve the internal space utilization of the cabinet 1. In addition, a window 100 is provided on one side of the cabinet 1 corresponding to the side of the high-voltage box 2, which facilitates the electrical connection between the positive output terminal and the negative output terminal of the external energy storage battery and the positive input terminal and the negative input terminal of the high-voltage box 2, thereby facilitating installation.

[0039] As a preferred embodiment, the bus assembly 3 in this embodiment includes a main positive bus 31, multiple branch positive buses 32, a main negative bus 33 and multiple branch negative buses 34, wherein the main positive bus 31 is electrically connected to the positive input terminal of the protective component 4, the other end of the main positive bus 31 is electrically connected to the multiple branch positive buses 32, and the other ends of the multiple branch positive buses 32 are respectively electrically connected to the positive output terminals of each high-voltage box 2; the main negative bus 33 is electrically connected to the negative input terminal of the protective component 4, the other end of the main negative bus 33 is electrically connected to the multiple branch negative buses 34, and the other ends of the multiple branch negative buses 34 are respectively electrically connected to the negative output terminals of each high-voltage box 2.

[0040] It should be noted that the positive output ends of multiple high-voltage boxes 2 are collected into the main positive circuit through the main positive bus 31 and multiple branch positive buses 32, and the negative output ends of multiple high-voltage boxes 2 are collected into the main negative circuit through the main negative bus 33 and multiple branch negative buses 34. Among them, the main positive bus 31, multiple branch positive buses 32, the main negative bus 33 and multiple branch negative buses 34 are all connected by copper busbars, which is not only convenient for installation, but also optimizes the layout of internal electrical components and wiring methods, and can effectively utilize the internal space of the cabinet 1.

[0041] On the basis of the above technical solution, preferably, the main positive bus 31 and the main negative bus 33 are arranged at intervals, and the distance between the two is not less than 25CM.

[0042] It should be noted that the main positive bus 31 and the main negative bus 33 are arranged at intervals to avoid coupling or interference due to the influence of magnetic fields or electric fields, thereby reducing interference between lines. This design helps to reduce the scope of danger that may occur when a fault occurs, thereby improving the safety of the system.

[0043] As a preferred implementation, the lightning protection component 5 in this embodiment includes two fusible fuses 51 and an AC lightning arrester 52, wherein the positive and negative output ends of the protective component 4 are electrically connected to one end of each fusible fuse 51, respectively, and the other ends of the two fusible fuses 51 are electrically connected to the positive and negative input ends of the AC lightning arrester 52, respectively, and the grounding end of the AC lightning arrester 52 is electrically connected to the grounding embedded component.

[0044] It should be noted that the blown fuse 51 limits the passage of current. When the current exceeds a certain value, the blown fuse 51 will melt due to overheating, thereby cutting off the circuit and preventing excessive current from damaging the circuit and equipment. The AC lightning arrester 52 is used to absorb the transient overvoltage and overcurrent of lightning and introduce it into the ground wire, thereby protecting the circuit and equipment from damage by overvoltage and overcurrent. The set blown fuse 51 and AC lightning arrester 52 can effectively protect the circuit and electronic components from the influence of transient overvoltage and overcurrent, thereby improving safety.

[0045] Specifically, the model of the AC lightning arrester 52 in this embodiment is an SPD AC lightning arrester.

[0046] In addition, in this embodiment, a door is provided on the front of the cabinet 1, and an opening is provided on the side of the cabinet 1 close to the ground. The position of the opening corresponds to the grounding end position of the lightning protection component 5, which facilitates the installation and connection between the grounding end of the lightning protection component 5 and the grounding embedded part.

[0047] This embodiment also includes a fuse 6, wherein the positive output end of the protection element 4 is electrically connected to one end of the fuse 6, the other end of the fuse 6 is electrically connected to the positive input end of the energy storage inverter, and the negative output end of the protection element 4 is electrically connected to the negative input end of the energy storage inverter.

[0048] It should be noted that the provided insurance fuse 6 can prevent the main positive and negative circuits output by the protection component 4 from causing damage to the energy storage converter when the current is too large, thereby playing a role of fuse protection.

[0049] This embodiment also includes a heat dissipation fan 7 , which is arranged on a side of the cabinet 1 away from the ground, and an air outlet of the heat dissipation fan 7 corresponds to the position of the protective member 4 , for dissipating heat inside the cabinet 1 .

[0050] It should be noted that a ventilation window is provided on one side of the cabinet 1 close to the protective member 4. By arranging a heat dissipation fan 7 and a ventilation window in the cabinet 1, the heat generated by the components in the cabinet 1 during use can flow to the outside of the cabinet 1 to achieve a heat dissipation effect.

[0051] Working principle:

[0052] A plurality of high-voltage boxes 2 are integrated into the cabinet 1, and the positive output ends of the plurality of high-voltage boxes 2 are collected on the main positive circuit through the main positive bus 31 and a plurality of branch positive buses 32, and the negative output ends of the plurality of high-voltage boxes 2 are collected on the main negative circuit through the main negative bus 33 and a plurality of branch negative buses 34, and then the main positive circuit and the main negative circuit are respectively connected to the positive and negative input ends of the protection component 4, and the protection component 4 plays a role of overload protection in the main positive and negative circuits, and the main positive and negative circuits led out by the protection component 4 are electrically connected to the positive and negative input ends of the external energy storage inverter, and a lightning protection component 5 is also provided on the positive and negative circuits led out by the protection component 4, and when a peak current or voltage suddenly occurs on the line through the lightning protection component 5, the shunt can be turned on in a very short time, so as to achieve the effect of current discharge and voltage limiting.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy storage high-voltage box combiner cabinet, characterized in that: It comprises a cabinet (1), a plurality of high-voltage boxes (2), a busbar assembly (3), a protective component (4) and a lightning protection assembly (5), wherein: The multiple high-voltage boxes (2) are all arranged in the cabinet (1), and the positive and negative input terminals of the multiple high-voltage boxes (2) are respectively electrically connected to the positive and negative output terminals of the corresponding energy storage batteries; The protection component (4) is arranged in the cabinet (1), and the positive and negative output ends of the plurality of high-voltage boxes (2) are electrically connected to the positive and negative input ends of the protection component (4) through the busbar assembly (3), and the positive and negative output ends of the protection component (4) are electrically connected to the positive and negative input ends of the energy storage converter respectively; The lightning protection component (5) is arranged in the cabinet (1), and the positive and negative input terminals of the lightning protection component (5) are respectively electrically connected to the positive and negative output terminals of the protection component (4), and the ground terminal of the lightning protection component (5) is grounded.

2. The energy storage high-voltage box combiner cabinet according to claim 1, characterized in that: The high-voltage box (2) comprises a relay switch (21), a shunt (22), a first relay (23), a first fuse (24), a second relay (25), a third relay (26) and a pre-charging resistor (27), wherein the positive and negative output ends of the energy storage battery are electrically connected to the positive and negative input ends of the relay switch (21) respectively, the negative output end of the relay switch (21) is electrically connected to one end of the shunt (22), the other end of the shunt (22) is electrically connected to one end of the contact of the first relay (23), the other end of the contact of the first relay (23) is electrically connected to the negative output end of the high-voltage box (2), and the relay switch ( The positive output end of the high-voltage box (21) is electrically connected to one end of the first fuse (24), the other end of the first fuse (24) is electrically connected to one end of the contact of the second relay (25) and one end of the contact of the third relay (26), the other end of the contact of the third relay (26) is electrically connected to the pre-charging resistor (27), the other end of the pre-charging resistor (27) is electrically connected to the other end of the contact of the second relay (25), and they are commonly connected to the positive output end of the high-voltage box (2), and the coils of the first relay (23), the second relay (25) and the third relay (26) are all electrically connected to the output end of the BMS battery management system.

3. The energy storage high-voltage box combiner cabinet according to claim 1, characterized in that: The multiple high-voltage boxes (2) are all arranged close to one side of the cabinet (1), and the multiple high-voltage boxes (2) are stacked and distributed along the vertical extension direction of the cabinet (1).

4. The energy storage high-voltage box combiner cabinet according to claim 1, characterized in that: The bus assembly (3) comprises a main positive bus (31), a plurality of branch positive buss (32), a main negative bus (33) and a plurality of branch negative buss (34), wherein: The main positive busbar (31) is electrically connected to the positive input end of the protection element (4), the other end of the main positive busbar (31) is electrically connected to the plurality of branch positive busbars (32), and the other ends of the plurality of branch positive busbars (32) are respectively electrically connected to the positive output ends of the respective high-voltage boxes (2); The main negative bus (33) is electrically connected to the negative input end of the protection element (4), the other end of the main negative bus (33) is electrically connected to the multiple branch negative bus (34), and the other ends of the multiple branch negative bus (34) are respectively electrically connected to the negative output ends of each high-voltage box (2).

5. The energy storage high-voltage box combiner cabinet according to claim 4, characterized in that: The main positive busbar (31) and the main negative busbar (33) are arranged at an interval, and the distance between the two is not less than 25 cm.

6. The energy storage high-voltage box combiner cabinet according to claim 1, characterized in that: The lightning protection component (5) comprises two fusible fuses (51) and an AC lightning arrester (52), wherein the positive and negative output ends of the protection component (4) are respectively electrically connected to one end of each of the fusible fuses (51), the other ends of the two fusible fuses (51) are respectively electrically connected to the positive and negative input ends of the AC lightning arrester (52), and the grounding end of the AC lightning arrester (52) is electrically connected to the grounding embedded component.

7. The energy storage high-voltage box combiner cabinet according to claim 1, characterized in that: It also includes a fuse (6), wherein the positive output end of the protection element (4) is electrically connected to one end of the fuse (6), the other end of the fuse (6) is electrically connected to the positive input end of the energy storage converter, and the negative output end of the protection element (4) is electrically connected to the negative input end of the energy storage converter.

8. The energy storage high-voltage box combiner cabinet according to claim 1, characterized in that: A window (100) is provided on one side of the cabinet (1) close to the high-voltage box (2); the position of the window (100) corresponds to the positions of the positive input terminal and the negative input terminal of the high-voltage box (2), so as to facilitate the connection between the energy storage battery and the high-voltage box (2).

9. The energy storage high-voltage box combiner cabinet according to claim 1, characterized in that: It also includes a heat dissipation fan (7), which is arranged on a side of the cabinet (1) away from the ground, and the air outlet end of the heat dissipation fan (7) corresponds to the position of the protective element (4), and is used to dissipate heat inside the cabinet (1).

10. The energy storage high-voltage box combiner cabinet according to claim 1, characterized in that: The protective component (4) is a molded case frame type circuit breaker.

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