Power module for energy storage inverter

Abstract

The utility model discloses a power module used for an energy storage inverter, comprising a sheet metal rack, the sheet metal rack is a square frame body, one side surface of the sheet metal rack is provided with a radiator, the radiator is respectively provided with an IGBT power module, a heating resistor, a temperature control switch and a voltage-sharing resistor, and the IGBT power module is respectively connected with a laminated bus, an AC output copper bar and a driving board. According to the utility model, the structure is compact, different severe environments can be adapted under the condition of ensuring high power, and the power density is improved, the load of a single IGBT is reduced and the service life of the IGBT is prolonged through the use of three parallel IGBTs; the voltage equalization of the small laminated busbar is realized through the voltage equalizing resistor, and the anti-interference capability of the small laminated busbar is enhanced; through a temperature control switch and a heating resistor, the functions of moisture-proof heating dehumidification, low-temperature starting heating and the like are achieved; through the low-inductance design of the laminated busbar, 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 technical field of energy storage inverters, and particularly relates to a power module for an energy storage inverter. Background Technique

[0002] In recent years, due to the global energy shortage and environmental pollution problems, the development and application of distributed power sources such as wind energy and solar energy have received more and more attention. With the rapid development of China's economy, the country vigorously develops distributed energy, which is an effective way to solve the energy shortage problem. However, with the large-scale grid connection of solar and wind power generation, the volatility and uncertainty of this intermittent energy have brought huge challenges to the stable operation of the power grid. Therefore, current new energy power stations are required to be equipped with a certain capacity of energy storage to play a role in suppressing power fluctuations, shaving peaks and filling valleys, stabilizing voltage and improving the power quality of the power grid.

[0003] With the overall high-speed growth of the energy storage industry, energy storage inverters have become key products. The core part is the inverter unit power module. Therefore, the power module plays a particularly important role in the whole machine, and has a high cost, high failure rate in the energy storage inverter, and a special application environment. Specifically, the 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 improvement of the single machine capacity, there is an urgent need for a structurally compact energy storage power module. Summary of the Utility Model

[0004] The problem to be solved by the utility model is to provide a power module, especially a power module for an energy storage inverter which is structurally compact, can adapt to different harsh environments while ensuring high power, has reliable high-power operation and strong high-environment adaptability.

[0005] To solve the above technical problems, the technical scheme adopted by the utility model is: a power module for an energy storage inverter, including a sheet metal frame, the sheet metal frame is a square frame body, a radiator is arranged on one side surface of the sheet metal frame, an IGBT power module, a heating resistor, a temperature control switch and a voltage equalizing resistor are respectively installed on the radiator, and the IGBT power module is respectively connected to a stacked busbar, an AC output copper bar and a drive board.

[0006] Further, the stacked busbar includes a large stacked busbar and a small stacked busbar, the large stacked busbar is placed on one side surface in the length direction of the sheet metal frame, and both ends of the small stacked busbar are placed at the center of the width direction of the upper surface of the sheet metal frame.

[0007] Further, the IGBT power module is of an I-type three-level topology structure, and the IGBT power module includes nine groups.

[0008] Further, both ends of the six groups of IGBT power modules are respectively connected to one end of the large laminated busbar and the small laminated busbar, and three groups of the IGBT power modules are respectively connected to the other end of the small laminated busbar and the AC output copper bar.

[0009] Further, the AC output copper bar is placed on the other side surface in the length direction of the sheet metal frame, and the AC output copper bar is arranged opposite to the large laminated busbar.

[0010] Further, the adapter board is placed above the IGBT power module, the drive board and the control board are both placed above the adapter board, and the IGBT power module is respectively connected to the drive board and the control board.

[0011] Further, the voltage-sharing resistor is placed at one end of the width direction of the upper surface of the sheet metal frame, the heating resistor is placed at the other end of the width direction of the upper surface of the sheet metal frame, the voltage-sharing resistor and the heating resistor are respectively installed on the radiator, the voltage-sharing resistor and the heating resistor are arranged opposite to each other, and the heating resistor is connected to the temperature control switch.

[0012] Further, the radiator is of a corrugated shovel tooth type structure.

[0013] Further, the drive board performs current sharing control on the IGBT power module.

[0014] Further, it further includes a handle, and the handle is installed at one end of the side surface in the length direction of the sheet metal frame.

[0015] The advantages and positive effects of the present utility model are as follows:

[0016] The structure of the present utility model is compact, and it can adapt to different harsh environments while ensuring high power. By using three parallel connections of IGBTs, the power density is increased, the load of a single IGBT is reduced, and the service life of the IGBT is extended; through the voltage-sharing resistor, the voltages of the small laminated busbars are made equal, and the anti-interference ability of the small laminated busbars is enhanced; through the temperature control switch and the heating resistor, functions such as moisture-proof heating and dehumidification, and heating for low-temperature startup are completed; through the low-inductance design of the laminated busbar, the voltage spike of the IGBT is reduced, and the operation reliability of the device is improved. Description of the Drawings

[0017] Figure 1 、 Figure 2 is the overall structural schematic diagram of an embodiment of the present utility model.

[0018] Figure 3 is the top view of the overall structure of an embodiment of the present utility model.

[0019] In the figure:

[0020] 1. Sheet metal frame; 2. IGBT power module; 3. Driver board;

[0021] 4. Large laminated busbar; 5. Small laminated busbar; 6. Control board;

[0022] 7. AC output copper bar; 8. Heating resistor; 9. Handle;

[0023] 10. Radiator; 11. Adapter board; 12. Voltage equalizing resistor;

[0024] 13. Temperature control switch. Detailed implementation mode

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] The following further describes the embodiments of the present utility model with reference to the accompanying drawings:

[0029] As Figures 1-3As shown in the figure, a power module for an energy storage inverter includes a sheet metal frame 1. The sheet metal frame 1 is a square box. A radiator 10 is provided on one side of the sheet metal frame 1. An IGBT power module 2, a heating resistor 8, a temperature control switch 13, and a voltage equalizing resistor 12 are respectively installed on the radiator 10. The IGBT power module 2 is respectively connected to a stacked busbar, an AC output copper bar 7, and a drive board 3.

[0030] Preferably, the radiator 10 is of a corrugated shovel tooth type structure, which improves the heat dissipation efficiency. As Figure 3 shown in the figure, the stacked busbar includes a large stacked busbar 4 and a small stacked busbar 5. The large stacked busbar 4 is placed on one side of the sheet metal frame 1 in the length direction. Both ends of the small stacked busbar 5 are respectively placed at the center of the width direction of the upper surface of the sheet metal frame 1. The stacked busbar adopts a low inductance design scheme to reduce the peak voltage of the IGBT power module 2 and improve the reliability of the device operation.

[0031] As Figure 3 shown in the figure, the IGBT power module 2 provided in this embodiment is of an I-type three-level topology structure, and the IGBT power module 2 includes nine groups. Specifically, both ends of six groups of IGBT power modules 2 are respectively connected to one end of the large stacked busbar 4 and the small stacked busbar 5. Three groups of IGBT power modules 2 are respectively connected to the other end of the small stacked busbar 5 and the AC output copper bar 7. The AC output copper bar 7 is placed on the other side of the sheet metal frame 1 in the length direction, and the AC output copper bar 7 is arranged opposite to the large stacked busbar 4.

[0032] As Figure 1 、 Figure 2 shown in the figure, an adapter board 11 is placed above the IGBT power module 2. Both the drive board 3 and the control board 6 are placed above the adapter board 11. The IGBT power module 2 is respectively connected to the drive board 3 and the control board 6. The drive board 3 performs current sharing control on the IGBT power module 2. The voltage equalizing resistor 12 is placed at one end of the width direction of the upper surface of the sheet metal frame 1. The voltage equalizing resistor 12 is installed on the radiator 10 and is connected to the small stacked busbar 5 to enhance the anti-interference ability of the small stacked busbar 5. The heating resistor 8 is placed at the other end of the width direction of the upper surface of the sheet metal frame 1. The heating resistor 8 is connected to the temperature control switch 13. The heating resistor 8 is installed on the radiator 10 for moisture-proof heating and dehumidification, and heating for low-temperature start-up. The voltage equalizing resistor 12 and the heating resistor 8 are arranged opposite to each other.

[0033] As Figures 1-3 shown in the figure, it further includes a handle 9. The handle 9 is installed at one end of the side of the sheet metal frame 1 in the length direction, which is convenient for handling and assembly.

[0034] The advantages and positive effects of the present utility model are:

[0035] The structure of the utility model is compact, and it can adapt to different harsh environments while ensuring high power. By using three IGBTs in parallel, the power density is increased, the load of a single IGBT is reduced, and the service life of the IGBT is extended. Through the voltage-sharing resistors, the voltages of the small laminated busbars are equalized, and the anti-interference ability of the small laminated busbars is enhanced. Through the temperature control switch and the heating resistor, functions such as moisture-proof heating and dehumidification, and low-temperature start-up heating are completed. Through the low-inductance design of the laminated busbar, the voltage spike of the IGBT is reduced, and the operation reliability of the device is improved.

[0036] The embodiments of the present utility model have been described in detail above, but the content described is only the preferred embodiment of the present utility model and cannot be considered as limiting the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of application of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. A power module for an energy storage inverter, characterized in that: It includes a sheet metal frame, which is a square frame. A radiator is provided on one side of the sheet metal frame. IGBT power modules, heating resistors, temperature control switches and voltage-equalizing resistors are respectively installed on the radiator. The IGBT power modules are respectively connected to the laminated busbar, the AC output copper busbar and the drive board.

2. A power module for an energy storage inverter according to claim 1, characterized in that: The laminated busbars include a large laminated busbar and a small laminated busbar. The large laminated busbar is placed on one side of the sheet metal frame in the length direction, and the two ends of the small laminated busbar are respectively placed at the center of the width direction of the upper surface of the sheet metal frame.

3. A power module for an energy storage inverter according to claim 2, characterized in that: The IGBT power module is a type I three-level topology structure, and the IGBT power module includes nine groups.

4. A power module for an energy storage inverter according to claim 3, characterized in that: Two ends of the six groups of IGBT power modules are respectively connected to the large stacked busbar and one end of the small stacked busbar, and three groups of IGBT power modules are respectively connected to the other end of the small stacked busbar and the AC output copper busbar.

5. A power module for an energy storage inverter according to any one of claims 2 to 4, characterized in that: The AC output copper busbar is placed on the other side of the sheet metal frame in the length direction, and the AC output copper busbar is arranged opposite to the large laminated busbar.

6. A power module for an energy storage inverter according to any one of claims 1 to 4, characterized in that: The adapter board is placed above the IGBT power module, the drive board and the control board are both placed above the adapter board, and the IGBT power module is connected to the drive board and the control board respectively.

7. A power module for an energy storage inverter according to any one of claims 1 to 4, characterized in that: The voltage-equalizing resistor is placed at one end of the upper surface of the sheet metal frame in the width direction, and the heating resistor is placed at the other end of the upper surface of the sheet metal frame in the width direction. The voltage-equalizing resistor and the heating resistor are respectively installed on the radiator, the voltage-equalizing resistor and the heating resistor are arranged opposite to each other, and the heating resistor is connected to the temperature control switch.

8. A power module for an energy storage inverter according to any one of claims 1 to 4, characterized in that: The radiator is a corrugated spade-tooth structure.

9. A power module for an energy storage inverter according to any one of claims 1 to 4, characterized in that: The driving board performs current sharing control on the IGBT power module.

10. A power module for an energy storage inverter according to any one of claims 1 to 4, characterized in that: It also includes a handle, which is installed at a side end of the sheet metal frame in the length direction.

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