Modular energy storage converters and energy storage systems

Abstract

This utility model provides a modular energy storage converter and energy storage system. The modular energy storage converter includes: a housing, mounting components, external terminals, a DC high-voltage module, an auxiliary power module, a main control board module, an AC power module, an inductor module, a half-bridge module, a heat dissipation module, and a disconnect switch. The housing is internally divided into an upper cavity and a lower cavity. The DC high-voltage module, auxiliary power module, and main control board module are fixed in the upper cavity by the mounting components, while the heat dissipation module, AC power module, inductor module, half-bridge module, and disconnect switch are located in the lower cavity. The external terminals are located outside the housing and are fixed to the panel. The modular energy storage converter and energy storage system provided by this utility model have good heat dissipation, achieve AC / DC separation and strong / weak current separation, effectively reduce the EMC of the equipment, and significantly improve the safety and service life of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, and in particular to a modular energy storage converter and energy storage system. Background Technology

[0002] The main function of a Power Converter System (PCS) is to convert DC and AC power. During off-peak hours, it stores the electricity output from the photovoltaic power generation system in batteries, and releases the stored energy during peak hours, reducing pressure on the power grid. In the event of a grid fault, the PCS switches to off-grid mode to continue supplying power to the load, achieving peak shaving and valley filling. It comprehensively utilizes advanced technologies to interconnect numerous distributed data acquisition devices, distributed energy storage devices, and various loads to form a new type of power network node, thereby achieving bidirectional energy flow, peer-to-peer energy exchange, and network sharing. Currently, existing PCS suffers from poor heat dissipation, low space utilization due to the dispersed arrangement of components, and some overlap between AC and DC components, which can easily cause interference. These issues urgently require improvement. Utility Model Content

[0003] The purpose of this utility model is to provide a modular energy storage converter and energy storage system, so as to at least solve the technical problems of low internal space utilization, poor heat dissipation and cross-layout of AC and DC devices in existing energy storage converters.

[0004] This utility model provides a modular energy storage converter, comprising: a housing, mounting components, external terminals, a DC high-voltage module, an auxiliary power module, a main control board module, an AC power module, an inductor module, a half-bridge module, a heat dissipation module, and a disconnect switch; the housing is internally divided into an upper cavity and a lower cavity; the DC high-voltage module, auxiliary power module, and main control board module are fixed in the upper cavity by the mounting components, the DC high-voltage module and the main control board module are both located between the auxiliary power module and the first side plate of the housing, and the main control board module is located between the DC high-voltage module and the front panel of the housing; the heat dissipation module, AC power module, inductor module, half-bridge module, and disconnect switch are all located in the upper cavity. The switch is located in the lower cavity; the heat dissipation module includes: a fan module, a liquid cooling plate, and a heat sink; the heat sink, inductor module, and half-bridge module are all fixed on the liquid cooling plate, the heat sink is located between the inductor module and the back plate of the housing, and the fan module is fixed on the mounting assembly; the AC power module is located between the fan module and the panel, and the AC power module is located between the inductor module and the second side plate of the housing; the inductor module is located between the AC power module and the half-bridge module, the half-bridge module is located between the inductor module and the first side plate, and the disconnect switch is located between the inductor module, the half-bridge module, and the panel; the external terminal is located outside the housing and is fixed through the panel.

[0005] Preferably, the mounting assembly includes a beam bracket and a fixing bracket; the fixing bracket is fixed to the bottom plate of the housing, and the beam bracket is fixed to the first side plate and the second side plate of the housing.

[0006] Preferably, the DC high voltage module is fixed on the crossbeam support, the fixed bracket and the first side plate, the auxiliary power module is fixed on the crossbeam support, the fixed bracket and the second side plate, and the main control board module is fixed on the crossbeam support and the base plate.

[0007] Preferably, the liquid cooling plate and the AC power module are both fixed on the base plate, the inlet and outlet of the liquid cooling plate are both fixed through the panel, and the fan module is fixed on the fixed bracket.

[0008] Preferably, the inductor module is electrically connected to the half-bridge module and the AC power module, the DC high-voltage module is electrically connected to the half-bridge module and the disconnect switch, and the auxiliary power module is electrically connected to the DC high-voltage module, the main control board module, the AC power module and the fan module.

[0009] Preferably, the auxiliary power module includes a pre-charge board and an auxiliary power supply; the pre-charge board is electrically connected to the auxiliary power supply, the main control board module, the fan module, the DC high voltage module, and the AC power module.

[0010] Preferably, the disconnect switch is fixed to the base plate, and the handle of the disconnect switch is located outside the housing and is fixed through the panel.

[0011] Preferably, the external terminals include: a communication module and multiple power terminals; the communication module is electrically connected to the main control board module, and the power terminals are electrically connected to the disconnect switch and the AC power module.

[0012] Preferably, the panel is provided with a pair of first handles.

[0013] This utility model also provides an energy storage system, including the modular energy storage converter as described above.

[0014] The modular energy storage converter and energy storage system provided by this utility model arranges the internal modules in two layers. The DC high-voltage module, auxiliary power module, and main control board module are located on the upper layer, while the heat dissipation module, AC power module, inductor module, half-bridge module, and disconnector are located on the lower layer. This significantly improves the utilization of internal space and achieves separation of AC and DC, as well as separation of strong and weak currents, effectively reducing the EMC of the equipment. In addition, the heat dissipation method combining fans, radiators, and liquid cooling plates can significantly reduce the structural area of ​​the liquid cooling plates, effectively improving the heat dissipation effect of each internal module and significantly improving the safety and service life of the equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a modular energy storage converter according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram showing the positions of the mounting components and heat dissipation module in an embodiment of this utility model.

[0018] Figure 3 This is a schematic diagram of the upper cavity module distribution in an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the distribution of the lower cavity module in an embodiment of the present invention.

[0020] Figure 5 This is an exploded structural diagram of the modular energy storage converter according to an embodiment of the present invention.

[0021] Figure 6 for Figure 5 A schematic diagram of the vent valve in the diagram. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] like Figures 1 to 5 As shown, this embodiment provides a modular energy storage converter, including: a housing, mounting components, external terminals 3, a DC high-voltage module 4, an auxiliary power module 5, a main control board module 6, an AC power module 7, an inductor module 8, a half-bridge module 9, a disconnecting switch 18, a heat dissipation module, and a vent valve 19.

[0024] Here, the DC high-voltage module 4 is used for DC side circuit breaking protection and suppression of common-mode interference to ensure the electromagnetic compatibility of the equipment; the auxiliary power module 5 is used to provide power to the low-voltage modules before the equipment is powered on, such as for control, drive, and sampling; the main control board module 6 is used to control the internal signal exchange and feedback of the entire system and to the outside; the AC power module 7 is used to centralize AC power into one channel, while also taking into account current sharing and protection; the inductor module 8 is used to smooth current and suppress ripple; the half-bridge module 9 is used to realize bidirectional conversion between DC and AC; and the disconnecting switch 18 is used for electrical isolation and to form a clear disconnection point.

[0025] like Figure 1 and Figure 2 As shown, the housing includes: a cover plate 10, a bottom plate 11, a front panel 12, a back plate 13, and two side plates (a first side plate 14 and a second side plate 15). Here, the cover plate 10 and the bottom plate 11 are arranged opposite to each other, the front panel 12 and the back plate 13 are arranged opposite to each other, and the two side plates are arranged opposite to each other.

[0026] The panel 12 is provided with a pair of first handles 16.

[0027] Preferably, the shell is a hollow cuboid structure, and its interior is divided into an upper cavity and a lower cavity along the direction from the cover plate 10 to the bottom plate 11 (i.e. from top to bottom).

[0028] like Figure 3 As shown, the DC high voltage module 4, the auxiliary power module 5, and the main control board module 6 are located in the upper cavity. The DC high voltage module 4 and the main control board module 6 are both located between the auxiliary power module 5 and the first side plate 14. The main control board module 6 is located between the DC high voltage module 4 and the panel 12. Here, the auxiliary power module 5 and the DC high voltage module 4 are located on both sides of the upper cavity, realizing the separation of strong and weak currents.

[0029] like Figure 2 and Figure 4 As shown, the heat dissipation module, AC power module 7, inductor module 8, half-bridge module 9, and disconnect switch 18 are located in the lower cavity. The heat dissipation module includes a fan module 30, a liquid cooling plate 31, and a heat sink 32. The liquid cooling plate 31 is fixed to the base plate 11, and the heat sink 32, inductor module 8, and half-bridge module 9 are fixed to the liquid cooling plate 31. The heat sink 32 is located between the inductor module 8 and the back plate 13, and the inductor module 8 is located between the AC power module 7 and the half-bridge module 9. The half-bridge module 9 is located between the inductor module 8 and the first side plate 14. Figure 4As shown, the AC power module 7 is fixed on the base plate 11 and located between the fan module 30 and the front panel 12, and the AC power module 7 is located between the inductor module 8 and the second side plate 15. The disconnect switch 18 is fixed on the base plate 11 and located between the inductor module 8, the half-bridge module 9, and the front panel 12. The handle 180 of the disconnect switch 18 is located outside the housing and is fixed through the front panel 12 for easy operation. It can be understood that there is an installation distance (e.g., 25mm-50mm) between the disconnect switch 18 and the front panel 12, which is beneficial to the airflow inside the housing.

[0030] like Figure 5 As shown, the disconnect switch 18, the half-bridge module 9, the first side plate 14, and the panel 12 form an accommodating space, and the lower edge bracket 60 of the main control board module 6 passes through this accommodating space and is fixed on the base plate 11.

[0031] like Figures 3 to 5 As shown, the DC high voltage module 4 is located above the half-bridge module 9, and both the DC high voltage module 4 and the half-bridge module 9 are located on one side of the inductor module 8, while the AC power module 7 is located on the other side of the inductor module 8. Thus, this embodiment achieves separation of AC (i.e., AC power module 7) and DC (i.e., half-bridge module 9 and DC high voltage module 4) in the internal space area.

[0032] The modular energy storage converter in this embodiment separates AC and DC power and strong and weak current, effectively reducing the EMC of the equipment and significantly improving the safety of the equipment.

[0033] As an example, the shell is made of cold-rolled steel.

[0034] like Figure 5 As shown, the cover plate 10 includes: an upper cover 100, foam 101, and conductive foam 102. Both foam 101 and conductive foam 102 are fixed on the upper cover 100, and foam 101 is located between the upper cover 100 and conductive foam 102.

[0035] As an example, foam 101 can be made of medium-hardness silicone foam material with a water absorption rate of less than 5%, providing good waterproof and cushioning effects. Conductive foam 102 is laminated inside foam 101 to form a sealing component, ensuring good sealing of the shell. Conductive foam 102 also ensures that the top cover 100 and the remaining shell have conductive contact, thus forming a stable shielding layer and effectively preventing electromagnetic interference.

[0036] like Figure 2As shown, the mounting components include a crossbeam bracket 20 and a fixed bracket 21. The fixed bracket 21 is fixed to the base plate 11, and the fan module 30 is fixed to the fixed bracket 21. The crossbeam bracket 20 is fixed to two side plates (first side plate 14 and second side plate 15). Along the direction from the front panel 12 to the back panel 13 (i.e., from front to back), the crossbeam bracket 20 is located between the front panel 12 and the fixed bracket 21, and the fixed bracket 21 is located between the crossbeam bracket 20 and the back panel 13.

[0037] like Figure 2 As shown, the inlet 33 and outlet 34 of the liquid cooling plate 31 are both fixed to the panel 12.

[0038] As an example, the liquid cooling plate 31 can be a water cooling plate, and the material of the liquid cooling plate 31 can be copper, aluminum alloy, etc.

[0039] like Figure 3 As shown, the DC high voltage module 4 is fixed on the crossbeam support 20, the fixed support 21 and the first side plate 14, the auxiliary power module 5 is fixed on the crossbeam support 20, the fixed support 21 and the second side plate 15, and the main control board module 6 is fixed on the crossbeam support 20 and the base plate 11.

[0040] Here, the DC high voltage module 4 integrates electrical components such as fuses, DC inductors, contactors, and current sensors. After the DC electrical components are connected, a metal shell is used to cover them, which can form a shielding layer for the DC electrical components, greatly reducing the impact of DC on AC, reducing the EMC interference of the system, and also allowing for offline pre-assembly of the DC high voltage module 4, significantly improving the assembly efficiency of the production line.

[0041] The auxiliary power module 5 includes: a pre-charge board 50 and an auxiliary power supply 51. The pre-charge board 50 is electrically connected to the auxiliary power supply 51, the main control board module 6, the fan module 30, the DC high voltage module 4, and the AC power module 7 via a wiring harness.

[0042] The main control board module 6 collects signals from within the system and communicates externally via the communication module 35. The main control board module 6 and the communication module 35 are located close to each other, which helps to shorten the cable length and reduce costs.

[0043] Both the inductor module 8 and the half-bridge module 9 are high-heat-generating components. They are fixed to the liquid cooling plate 31 with thermal grease applied to their bottoms. Heat is conducted through direct contact with the liquid cooling plate 31, and the heat is carried away by the coolant circulating in the liquid cooling plate 31.

[0044] like Figure 2 and Figure 4As shown, the fan module 30 blows air onto the AC power module 7, removing the heat generated by the AC power module 7 during operation and circulating it inside the casing. The heat is then transferred to the liquid cooling plate 31 by the heat sink 32 for heat dissipation. This embodiment uses a combination of fan, heat sink and liquid cooling plate for heat dissipation, which can significantly reduce the structural area of ​​the liquid cooling plate, effectively improve the heat dissipation effect of each internal module, and significantly improve the safety and service life of the equipment.

[0045] The AC inductor and power are integrated into the AC power module 7, which reduces copper busbar connections, the types of materials, and assembly time, significantly improving assembly efficiency.

[0046] In this embodiment, the modular design of the inductor can reduce the size of the inductor.

[0047] It is understood that each module in this embodiment has a safety gap reserved according to the relevant electrical specifications during installation, which will not be elaborated further in this utility model. These installation gaps can prevent the modules from stacking and serve as heat dissipation channels for the fan, which is conducive to airflow and thus accelerates heat dissipation. It is understood that the installation interval can be set according to actual needs.

[0048] like Figure 5 As shown, the external terminal 3 includes a communication module 35 and multiple power terminals 36.

[0049] Inductor module 8 is electrically connected to half-bridge module 9 and AC power module 7 via copper busbars. DC high-voltage module 4 is electrically connected to half-bridge module 9 and disconnect switch 18 via copper busbars. Auxiliary power module 5 is electrically connected to DC high-voltage module 4, main control board module 6, AC power module 7, and fan module 30 via wiring harness. Communication module 35 is electrically connected to main control board module 6 via wiring harness. Power terminal 36 is electrically connected to disconnect switch 18 and AC power module 7 via copper busbars.

[0050] like Figure 5 and Figure 6 As shown, the vent valve 19 is fixed to the back plate 13. The inside of the shell exchanges gas with the outside through the vent valve 19 to balance the internal pressure of the shell and avoid pressure imbalance caused by temperature changes inside the shell.

[0051] This embodiment also provides an energy storage system, including the modular energy storage converter described above. It is understood that the energy storage system also includes: grid devices, energy storage batteries, etc.

[0052] The modular energy storage converter and energy storage system provided in this embodiment arrange the internal modules in two layers. The DC high-voltage module, auxiliary power module, and main control board module are located on the upper layer, while the heat dissipation module, AC power module, inductor module, half-bridge module, and disconnector are located on the lower layer. This achieves separation of AC and DC, as well as separation of strong and weak currents, effectively reducing the EMC of the equipment. This embodiment also uses a heat dissipation method combining fans, radiators, and liquid cooling plates, which can significantly reduce the structural area of ​​the liquid cooling plates, effectively improve the heat dissipation effect of each internal module, and significantly improve the safety and service life of the equipment.

[0053] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A modular energy storage converter, characterized by, include: Housing, mounting components, external terminals, DC high voltage module, auxiliary power module, main control board module, AC power module, inductor module, half-bridge module, heat dissipation module, disconnecting switch; The interior of the shell is divided into an upper cavity and a lower cavity; The DC high voltage module, auxiliary power module, and main control board module are fixed in the upper cavity by mounting components. The DC high voltage module and the main control board module are both located between the auxiliary power module and the first side plate of the housing, and the main control board module is located between the DC high voltage module and the panel of the housing. The heat dissipation module, AC power module, inductor module, half-bridge module, and disconnector are located in the lower cavity; the heat dissipation module includes: a fan module, a liquid cooling plate, and a heat sink; The heat sink, inductor module, and half-bridge module are all fixed on the liquid cooling plate. The heat sink is located between the inductor module and the back plate of the housing. The fan module is fixed on the mounting assembly. The AC power module is located between the fan module and the panel, and the AC power module is located between the inductor module and the second side plate of the housing. The inductor module is located between the AC power module and the half-bridge module, and the half-bridge module is located between the inductor module and the first side plate. The disconnect switch is located between the inductor module, the half-bridge module, and the panel. The external terminal is located outside the housing and is fixed to the panel through it.

2. The modular energy storage converter of claim 1, wherein, The mounting assembly includes a crossbeam bracket and a fixing bracket; the fixing bracket is fixed to the bottom plate of the housing, and the crossbeam bracket is fixed to the first side plate and the second side plate of the housing.

3. The modular energy storage converter of claim 2, wherein, The DC high voltage module is fixed on the crossbeam support, the fixed bracket and the first side plate, the auxiliary power module is fixed on the crossbeam support, the fixed bracket and the second side plate, and the main control board module is fixed on the crossbeam support and the base plate.

4. The modular energy storage converter of claim 2, wherein, The liquid cooling plate and AC power module are both fixed on the base plate. The inlet and outlet of the liquid cooling plate are both fixed through the panel, and the fan module is fixed on the fixed bracket.

5. The modular energy storage converter of claim 1, wherein, The inductor module is electrically connected to the half-bridge module and the AC power module, the DC high-voltage module is electrically connected to the half-bridge module and the disconnect switch, and the auxiliary power module is electrically connected to the DC high-voltage module, the main control board module, the AC power module and the fan module.

6. The modular energy storage converter of claim 5, wherein, The auxiliary power module includes: a pre-charge board and an auxiliary power supply; The precharge board is electrically connected to the auxiliary power supply, the main control board module, the fan module, the DC high voltage module, and the AC power module.

7. The modular energy storage converter of claim 1, wherein, The disconnect switch is fixed to the base plate, and the handle of the disconnect switch is located outside the housing and is fixed to the panel through it.

8. The modular energy storage converter of claim 1, wherein, The external terminals include: a communication module and multiple power terminals; The communication module is electrically connected to the main control board module, and the power terminals are electrically connected to the disconnect switch and the AC power module.

9. The modular energy storage converter of claim 1, wherein, The panel is equipped with a pair of first handles.

10. An energy storage system characterized by, include: The modular energy storage converter as described in any one of claims 1 to 9.

Images