Power assembly for energy storage inverter

Abstract

The utility model discloses a power assembly used for an energy storage inverter, comprising a radiator, the top of the radiator is provided with a large laminated busbar, a sheet metal frame and an IGBT unit, one end of the large laminated busbar is connected with an output terminal of an IGBT group, and the other end of the large laminated busbar is fixed on the top of the radiator through an insulation column; direct current insulating plates are arranged below the output terminals of the IGBT group; a small laminated busbar is arranged above the direct-current insulating plate; an alternating current output copper bar is arranged on an alternating current output terminal of the IGBT group; the adapter plates are arranged on the two sides of the small laminated busbar, the control panel insulating plate is arranged above the small laminated busbar, and the driving plate is installed on the control panel insulating plate. According to the utility model, the power density is improved, the load of a single IGBT is reduced, and the service life of the IGBT is prolonged; the voltage equalization of the small laminated busbar is realized, and the anti-interference capability of the small laminated busbar is enhanced; functions of moisture-proof heating dehumidification, low-temperature starting heating and the like are completed; the IGBT voltage spike is reduced, and the operation reliability of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the field of energy storage, and in particular relates to a power component for an energy storage inverter. Background Art

[0002] With the continuous advancement of the energy system, energy storage technology is developing rapidly and has become a key link in achieving sustainable energy supply. As the energy storage and energy output of renewable energy, the core component of energy storage technology, IGBT power module, is required to have high operating reliability. However, its cost is high, the failure rate is high, and the application environment is special: IGBT power module is required to have high adaptability to harsh environments such as low temperature and high humidity. Therefore, under the condition of continuous increase in single-machine capacity, it is particularly important to design a compact energy storage power module. Utility Model Content

[0003] The utility model is proposed to overcome the shortcomings in the prior art, and its purpose is to provide a power component for an energy storage inverter.

[0004] The utility model is realized by the following technical solutions:

[0005] A power component for an energy storage inverter comprises a heat sink, a large laminated busbar and a sheet metal frame are arranged on the top of the heat sink, an IGBT unit is arranged on the top of the heat sink surrounded by the sheet metal frame, and the IGBT unit is composed of two rows of IGBT groups arranged in parallel; each IGBT group is provided with a plurality of IGBTs; the bottom of one end of the large laminated busbar is connected to a terminal at one end of a first IGBT group, and the other end of the large laminated busbar is fixed to the top of the heat sink through a plurality of insulating columns; a DC insulating plate is arranged below the terminal on the large laminated busbar side of the first IGBT group and below the adjacent terminals of the two IGBT groups; a small laminated busbar is arranged above the adjacent terminals of the first IGBT group and the second IGBT group, and the small laminated busbar 5 is connected to the adjacent terminals of the two IGBT groups; an AC output copper busbar is arranged on the terminal of the second IGBT group away from the large laminated busbar side; two adapter boards are arranged above the IGBT unit, and the adapter boards are connected to the terminals of the IGBT; a control board insulating board is arranged above the small laminated busbar, and a drive board is mounted on the control board insulating board.

[0006] In the above technical solution, a heating resistor is installed on the top of the radiator.

[0007] In the above technical solution, a voltage-equalizing resistor is installed on the top of the heat sink, and the voltage-equalizing resistor is connected to the small laminated busbar.

[0008] In the above technical solution, a handle is provided on the side wall of the radiator.

[0009] In the above technical solution, the radiator adopts a corrugated skived profile.

[0010] In the above technical solution, an axial flow fan is arranged on the side wall of the sheet metal frame.

[0011] In the above technical solution, the AC output copper busbar is bent at a right angle, the horizontal portion is connected to the AC output terminal of the IGBT group, the vertical portion is fixed to the inner side of the sheet metal frame, and an AC insulating plate No. I is arranged between the vertical portion of the AC output copper busbar and the inner side of the sheet metal frame, an AC insulating plate No. II is arranged between the horizontal portion and the top of the heat sink, and the AC insulating plate No. II is placed below the IGBT group terminal.

[0012] In the above technical solution, the two adapter plates are placed on both sides of the small laminated busbar.

[0013] In the above technical solution, the control board insulation plate is fixed to the radiator through a sheet metal bracket.

[0014] In the above technical solution, the adapter plate group includes an outer tube adapter plate and an inner tube adapter plate, the outer tube adapter plate and the inner tube adapter plate are placed on both sides of the small stack busbar, and the outer tube adapter plate is arranged at one end close to the large stack busbar.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a power component for an energy storage inverter with high power, reliable operation and high environmental adaptability. By using four IGBTs in parallel, the power density is improved, the load of a single IGBT is reduced, and the life of the IGBT is extended. By using equalizing resistors, the voltage of small stacked busbars is equalized, and the anti-interference ability of the small stacked busbars is enhanced. By using heating resistors, functions such as moisture-proof heating and dehumidification and low-temperature start-up heating are completed. By using a low-inductance design of the stacked busbars, the voltage spike of the IGBT is reduced, and the operating reliability of the device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a top view of the utility model;

[0019] Figure 3 It is a top view of the utility model after removing the drive board, the control board insulation board and the adapter board;

[0020] Figure 4 It is the front view of the utility model;

[0021] Figure 5 It is a top view of the utility model after the drive board, the large stacked busbar, the small stacked busbar, the control board insulation board and the adapter board are removed.

[0022] in:

[0023] 1. Sheet metal frame; 2. IGBT group; 3. Driver board; 4. Large stacked busbar; 5. Small stacked busbar; 6. Control board insulation board; 7. AC output copper busbar; 8. Heating resistor; 9. Handle; 10. Radiator; 11. Outer tube adapter board; 12. Axial fan; 13. DC insulation board; 14. No. Ⅰ AC insulation board; 15. No. Ⅱ AC insulation board; 16. Voltage equalizing resistor; 17. Sheet metal bracket; 18. Insulation column; 19. Inner tube adapter board.

[0024] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0026] like Figures 1 to 5 As shown, a power component for an energy storage inverter includes a heat sink 10, a large laminated busbar 4 and a sheet metal frame 1 are arranged on the top of the heat sink 10, and an IGBT unit is arranged on the top of the heat sink 10 surrounded by the sheet metal frame 1;

[0027] The IGBT unit is composed of two rows of IGBT groups arranged in parallel; the first IGBT group is composed of 8 IGBTs, the second IGBT group is composed of four IGBTs arranged at intervals, and the first IGBT group is arranged close to the large laminated busbar 4;

[0028] The bottom of one end of the large stacked busbar 4 is connected to one end terminal of the first IGBT group, and the other end of the large stacked busbar 4 is fixed to the top of the heat sink 10 through a plurality of insulating columns 18;

[0029] A DC insulation plate 13 is provided under the terminals on the large laminated busbar side of the first IGBT group and under the adjacent terminals of the two IGBT groups, and the DC insulation plate 13 on the large laminated busbar side is located under the large laminated busbar 4;

[0030] A small stacked busbar 5 is arranged above the terminals adjacent to the first IGBT group and the second IGBT group, and the small stacked busbar 5 is connected to the terminals adjacent to each other of the two IGBT groups;

[0031] An AC output copper bar 7 is arranged on the terminal of the second IGBT group away from the large laminated busbar side. The AC output copper bar 7 is bent at a right angle, and the horizontal portion is connected to the terminal of the second IGBT group away from the large laminated busbar side, and the vertical portion is fixed to the inner side of the sheet metal frame 1. A No. I AC insulating plate 14 is arranged between the vertical portion of the AC output copper bar 7 and the inner side of the sheet metal frame 1, and a No. II AC insulating plate 15 is arranged between the horizontal portion and the top of the heat sink 10, and the No. II AC insulating plate 15 is placed below the terminal of the second IGBT group away from the large laminated busbar side.

[0032] An adapter plate group is arranged above the IGBT unit, and the adapter plate group includes an outer tube adapter plate 11 and an inner tube adapter plate 19, the outer tube adapter plate 11 and the inner tube adapter plate 19 are placed on both sides of the small stack busbar 5, and the outer tube adapter plate 11 is arranged at one end close to the large stack busbar 4; the inner tube adapter plate 19 is arranged above the terminals adjacent to the first group of IGBT groups and the second group of IGBT groups, and the outer tube adapter plate 11 and the inner tube adapter plate 19 are connected to the terminals of the opposite IGBT2;

[0033] A control board insulation board 6 is arranged above the small laminated busbar 5, and the control board insulation board 6 is fixed to the heat sink 10 through a sheet metal bracket 17. The drive board 3 is mounted on the control board insulation board 6, and the drive board 3 performs current sharing control on the IGBT 2;

[0034] The large stacked busbar 4 and the small stacked busbar 5 both adopt a low inductance design to reduce the IGBT peak voltage and improve the reliability of device operation;

[0035] The control board insulation board 6, the DC insulation board 13, the No. I AC insulation board 14 and the No. II AC insulation board 15 are arranged to strengthen the insulation between the large and small laminated busbars 4, 5 and the radiator 10, and between the drive board 3 and the small laminated busbar 5;

[0036] A heating resistor 8 is installed on the top of the radiator 10 to heat and dry the radiator; the heating resistor 8 is placed under the large laminated busbar 4 and installed on the top of the radiator.

[0037] A voltage grading resistor 16 is installed on the top of the heat sink 10 , and the voltage grading resistor 16 is connected to the small stacked busbar 5 through a wire to enhance the anti-interference capability of the small stacked busbar 5 .

[0038] A handle 9 is provided on the side wall of the radiator 10 to facilitate transportation and assembly.

[0039] The heat sink 10 adopts a corrugated shovel-tooth profile design to improve heat dissipation efficiency.

[0040] An axial flow fan 12 is disposed on the side wall of the sheet metal frame 1 to enhance the heat dissipation of the drive board and the adapter board.

[0041] The applicant declares that the above is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. The technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by the technicians in the relevant technical field within the technical scope disclosed in the present utility model fall within the protection scope and disclosure scope of the present utility model.

Claims

1. A power component for an energy storage inverter, characterized in that: The invention comprises a heat sink (10), wherein a large laminated busbar (4) and a sheet metal frame (1) are arranged on the top of the heat sink (10), and an IGBT unit is arranged on the top of the heat sink (10) surrounded by the sheet metal frame (1), wherein the IGBT unit is composed of two rows of IGBT groups arranged in parallel; each IGBT group is provided with a plurality of IGBTs (2); the bottom of one end of the large laminated busbar (4) is connected to a terminal at one end of the first IGBT group, and the other end of the large laminated busbar (4) is fixed to the top of the heat sink (10) via a plurality of insulating columns (18); the bottom of the large laminated busbar side terminal of the first IGBT group and the two groups are connected to the IGBT group. A DC insulating plate (13) is arranged below adjacent terminals of the IGBT group; a small laminated busbar (5) is arranged above adjacent terminals of the first IGBT group and the second IGBT group, and the small laminated busbar (5) is connected to adjacent terminals of the two IGBT groups; an AC output copper busbar (7) is arranged on the terminal of the second IGBT group away from the large laminated busbar; an adapter board group is arranged above the IGBT unit, and the adapter board group is connected to the terminal of the corresponding IGBT (2); a control board insulating plate (6) is arranged above the small laminated busbar (5), and the drive board (3) is mounted on the control board insulating plate (6).

2. The power component for energy storage inverter according to claim 1, characterized in that: A heating resistor (8) is installed on the top of the heat sink (10).

3. The power component for energy storage inverter according to claim 1, characterized in that: A voltage grading resistor (16) is installed on the top of the heat sink (10), and the voltage grading resistor (16) is connected to the small laminated busbar (5).

4. The power component for energy storage inverter according to claim 1, characterized in that: A handle (9) is provided on the side wall of the radiator (10).

5. The power component for energy storage inverter according to claim 1, characterized in that: The radiator (10) adopts a corrugated shovel-tooth profile.

6. The power component for energy storage inverter according to claim 1, characterized in that: An axial flow fan (12) is arranged on the side wall of the sheet metal frame (1).

7. The power component for energy storage inverter according to claim 1, characterized in that: The AC output copper busbar (7) is bent at a right angle, the horizontal portion is connected to the AC output terminal of the IGBT group (2), the vertical portion is fixed to the inner side of the sheet metal frame (1), and a No. I AC insulating plate (14) is arranged between the vertical portion of the AC output copper busbar (7) and the inner side of the sheet metal frame (1), and a No. II AC insulating plate (15) is arranged between the horizontal portion and the top of the heat sink (10), and the No. II AC insulating plate (15) is placed below the terminal of the IGBT group (2).

8. The power component for energy storage inverter according to claim 1, characterized in that: The two adapter plates (11) are placed on both sides of the small laminated busbar (5).

9. The power component for energy storage inverter according to claim 1, characterized in that: The control board insulation plate (6) is fixed to the radiator (10) via a sheet metal bracket (17).

10. The power component for energy storage inverter according to claim 1, characterized in that: The adapter plate group comprises an outer tube adapter plate (11) and an inner tube adapter plate (19), the outer tube adapter plate (11) and the inner tube adapter plate (19) being arranged on both sides of the small stack busbar (5), and the outer tube adapter plate (11) being arranged at one end close to the large stack busbar (4).

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