A series flow channel water cooling plate for an energy storage converter

Abstract

The utility model discloses a series flow channel water cooling plate for energy storage converter, including cold plate body, water inlet pipe and water outlet pipe, the position corresponding with IGBT module installation area in the cold plate body is equipped with module area flow channel, and water inlet pipe, module area flow channel, electric reactance area flow channel and water outlet pipe are in proper order series connection through main pipe flow channel, module area flow channel is set up in S shape meanders, and the adjacent module area flow channel is separated through the baffle, is equipped with a plurality of fin in module area flow channel, and the fin divides module area flow channel into a plurality of module partial flow channel, the utility model discloses the flow channel of IGBT module installation area is designed into the S shape flow channel of close meanders, makes it cover whole IGBT cooling area, makes single IGBT radiating surface radiate evenly, and the radiating effect is good, the utility model discloses the fin in module area flow channel is set up, and the width of module partial flow channel gradually becomes small along the cooling liquid flow direction through the thickness difference of fin, thereby makes the radiating capacity of IGBT installed in each area close.

Description

Technical Field

[0001] This utility model relates to the technical field of heat dissipation for energy storage converters, and specifically to a series flow channel water-cooled plate for energy storage converters. Background Technology

[0002] As a core component of energy storage systems, the power storage converter (PCS) is responsible for bidirectional conversion between direct current and alternating current, playing a crucial role in energy dispatch and grid frequency regulation. With the development of energy storage systems towards higher power density and larger capacity (e.g., centralized energy storage power stations often reach megawatt levels), the power rating of power storage converters is continuously increasing, leading to a significant increase in the heat generated by their internal power semiconductor devices (such as IGBTs and SiC MOSFETs) and reactors. For example, the heat flux density of a single IGBT module can reach over 100 W / cm². If the heat cannot be dissipated in time, it will cause the junction temperature of the device to rise, directly affecting the converter's conversion efficiency and reliability (for every 10°C increase in temperature, the lifespan of electronic devices may be halved), and even causing safety risks such as burnout.

[0003] Water-cooled plates are an important component of liquid-cooled energy storage converters, used to dissipate heat from key power devices such as IGBTs (Insulated Gate Bipolar Transistors) and reactors.

[0004] In water-cooled plate design, the flow channels are usually made in series, which has good flow uniformity and avoids the problem of uneven branch flow distribution caused by differences in branch flow resistance due to manufacturing tolerances and minor geometric changes in parallel flow channels. Moreover, the flow channels are simpler, more manufacturable, and more cost-effective than parallel flow channels. However, the disadvantage is that the coolant temperature at the end is higher, the heat dissipation capacity is reduced, and the lifespan of the power devices at the end will be reduced in the long run. As a critical power device, the heat dissipation uniformity of IGBTs is very important. It can be said that the heat dissipation uniformity of the water-cooled plate for IGBTs is an important indicator for measuring the quality of the water-cooled plate.

[0005] Therefore, it is necessary to optimize the design of the series water-cooled plate to improve the heat dissipation uniformity of the IGBT, thereby increasing the lifespan of the converter. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings and deficiencies of the existing technology in terms of poor heat dissipation uniformity of IGBTs through series flow channels, and to provide a series flow channel water-cooled plate for energy storage converters.

[0007] To achieve the above objectives, this utility model proposes a series-channel water-cooled plate for an energy storage converter, comprising a cold plate body, an inlet pipe, and an outlet pipe. The inlet pipe and outlet pipe are respectively connected to the inlet and outlet of the cold plate body. The surface of the cold plate body is provided with a reactor mounting area and several IGBT module mounting areas. A reactor area flow channel is provided in the cold plate body at a position corresponding to the reactor mounting area, and a module area flow channel is provided in the cold plate body at a position corresponding to the IGBT module mounting area. The inlet pipe, module area flow channel, reactor area flow channel, and outlet pipe are connected in series through the main pipeline flow channel. The module area flow channel is arranged in an S-shape, and adjacent module area flow channels are separated by partitions. Several fins are provided in the module area flow channel, and the fins divide the module area flow channel into several module sub-flow channels.

[0008] Preferably, the width of the reactive zone flow channel is greater than the width of the main flow channel.

[0009] Preferably, the thickness of the partition is less than the width of the flow channel in the module area.

[0010] Preferably, the thickness of the fins gradually increases along the direction of coolant flow.

[0011] Preferably, the width of the module's flow channel gradually decreases along the coolant flow direction.

[0012] Preferably, the reactance zone flow channel is provided with a number of flow dividers, which divide the reactance zone flow channel into a number of reactance flow dividers, and the flow dividers are perpendicular to the fins.

[0013] Preferably, the flow channel in the module area covers the entire IGBT module mounting area, and the flow channel in the reactor area covers the entire reactor mounting area.

[0014] The beneficial effects of this utility model are as follows: By designing the flow channel of the IGBT module installation area into a tightly meandering S-shaped flow channel, this utility model covers the entire IGBT cooling area, making the heat dissipation of each IGBT heat dissipation surface uniform and the heat dissipation effect good. Along the flow direction of the coolant, the coolant temperature increases and the heat dissipation capacity decreases. This utility model sets fins in the flow channel of the module area. Through the difference in the thickness of the fins, the width of the module branch channel gradually decreases along the flow direction of the coolant. Since the total flow rate is constant, the flow velocity of the coolant gradually increases, and the convective thermal resistance decreases. This makes the heat dissipation capacity of the IGBTs installed in each area similar, which can improve the temperature uniformity of each IGBT and thus improve the life of the converter.

[0015] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is an enlarged view of the flow channel in the first area of ​​the module described in this utility model;

[0019] Figure 4 This is an enlarged view of the flow channel in the second zone of the module described in this utility model;

[0020] Figure 5 This is an enlarged view of the three-zone flow channel of the module described in this utility model;

[0021] Figure 6 This is a schematic diagram of the module installation of this utility model.

[0022] In the diagram: 1. Cold plate body; 2. Inlet pipe; 3. Outlet pipe; 4. IGBT module installation area; 5. Reactor installation area; 6. Partition plate; 7. Fin; 10. Module area flow channel; 11. Module three area flow channel; 111. Fin three; 112. Branch flow channel three; 12. Module two area flow channel; 121. Fin two; 122. Branch flow channel two; 13. Module one area flow channel; 131. Fin one; 132. Branch flow channel one; 14. Reactor area flow channel; 15. Main pipeline flow channel. Detailed Implementation

[0023] See Figures 1 to 6 A series-channel water-cooled plate for an energy storage converter includes a cold plate body 1, an inlet pipe 2, and an outlet pipe 3. The inlet pipe 2 and the outlet pipe 3 are respectively connected to the inlet and outlet of the cold plate body 1. The surface of the cold plate body 1 is provided with a reactor mounting area 5 and several IGBT module mounting areas 4. A reactor area flow channel 14 is provided in the cold plate body at a position corresponding to the reactor mounting area 5. A module area flow channel 10 is provided in the cold plate body at a position corresponding to the IGBT module mounting area 4. The inlet pipe 2, the module area flow channel 10, the reactor area flow channel 14, and the outlet pipe 3 are connected in series through a main pipeline flow channel 15. The module area flow channel 10 is arranged in an S-shape. Adjacent module area flow channels 10 are separated by a partition 6. Several fins 7 are provided in the module area flow channel 10, and the fins 7 divide the module area flow channel 10 into several module sub-flow channels.

[0024] The width of the reactor zone flow channel 14 is greater than the width of the main flow channel 15.

[0025] The thickness of the partition 6 is less than the width of the flow channel 10 in the module area.

[0026] The thickness of the fin 7 gradually increases along the direction of coolant flow.

[0027] The width of the module's distribution channel gradually decreases along the coolant flow direction.

[0028] The reactor flow channel 14 is provided with a number of flow dividers, which divide the reactor flow channel 14 into a number of reactor flow dividers. The flow dividers are perpendicular to the fins 7.

[0029] The module area flow channel 10 covers the entire IGBT module mounting area 4, and the reactor area flow channel 14 covers the entire reactor mounting area 5.

[0030] This embodiment sets up three IGBT module installation areas arranged in a straight line, namely module area 1 flow channel 13, module area 2 flow channel 12, and module area 3 flow channel 11.

[0031] In the flow channel 13 of the module one area, two fins 131 are arranged at equal intervals in the flow channel. The flow channel is divided into three branch channels 132 by the fins 131. The thickness of the fins 131 is L3 and the width of the branch channels 132 is L31.

[0032] In the flow channel 12 of module two, two fins 121 are arranged at equal intervals in the flow channel. The flow channel is divided into three branch channels 122 by the fins 121. The thickness of the fins 121 is L2 and the width of the branch channels 122 is L21.

[0033] In the flow channel 11 of module three, two fins 111 are arranged at equal intervals in the flow channel. The flow channel is divided into three branch channels 112 by the fins 111. The thickness of the fins 111 is L1 and the width of the branch channels 112 is L11.

[0034] The flow channels 13 in module one, 12 in module two, and 11 in module three have equal widths, all being L. The fin thickness satisfies L3 < L2 < L1, and the width of the branch channels satisfies L31 > L21 > L11.

[0035] When the flow velocity increases within the flow channel, the boundary layer becomes thinner and turbulence intensifies, resulting in a decrease in convective thermal resistance and an increase in heat dissipation efficiency. In this invention, since the flow channels 13 in module one, 12 in module two, and 11 in module three are connected in series, their total flow rates are equal. Because the widths of the branch channels satisfy L31 > L21 > L11, the flow velocity in the branch channels increases: the flow velocity of branch channel one 132 < the flow velocity of branch channel two 122 < the flow velocity of branch channel three 112, thereby causing the convective thermal resistance to gradually decrease along the direction of coolant flow.

[0036] The coolant flows from channel 13 in module 1 to channel 12 in module 2 and then to channel 11 in module 3. The coolant temperature increases, but the convective thermal resistance decreases, making the heat dissipation capacity of channel 13 in module 1, channel 12 in module 2, and channel 11 in module 3 similar. This makes the heat dissipation capacity of the IGBTs installed in these three zones similar, improving the temperature uniformity among the IGBTs and thus increasing the lifespan of the converter.

[0037] Because IGBTs are more thermally sensitive than reactors, and reactors can operate at higher temperatures, after the IGBTs dissipate heat, the coolant re-enters the reactor flow channel area, which can still effectively dissipate heat for the reactor without the need for flow diversion, thus eliminating the risk of flow imbalance in parallel flow channels. Therefore, in this invention, the flow channel passes through the IGBT flow channel first and then through the reactor flow channel area.

[0038] Specifically, L=15mm, L3=1.5mm, L2=2.25mm, L1=3mm, L31=4mm, L21=3.5mm, and L11=3mm.

[0039] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A series-channel water-cooled plate for an energy storage converter, characterized in that: The device includes a cold plate body (1), an inlet pipe (2), and an outlet pipe (3). The inlet pipe (2) and the outlet pipe (3) are connected to the inlet and outlet of the cold plate body (1), respectively. The surface of the cold plate body (1) is provided with a reactor mounting area (5) and several IGBT module mounting areas (4). A reactor flow channel (14) is provided in the cold plate body (1) at a position corresponding to the reactor mounting area (5). The cold plate body (1) is connected to the IGBT module mounting area. The module flow channel (10) is provided at the location corresponding to the zone (4). The inlet pipe (2), module flow channel (10), reactor flow channel (14) and outlet pipe (3) are connected in series through the main pipeline flow channel (15). The module flow channel (10) is arranged in an S-shape. Adjacent module flow channels (10) are separated by partitions (6). The module flow channel (10) is provided with several fins (7). The fins (7) divide the module flow channel (10) into several module sub-flow channels.

2. The series-connected water-cooled plate of the energy storage converter as described in claim 1, characterized in that: The width of the reactive zone flow channel (14) is greater than the width of the main flow channel (15).

3. The series-connected water-cooled plate of the energy storage converter as described in claim 1, characterized in that: The thickness of the partition (6) is less than the width of the flow channel (10) in the module area.

4. The series-flow-channel water-cooled plate of the energy storage converter as described in claim 1, characterized in that: The thickness of the fins (7) gradually increases along the direction of coolant flow.

5. The series-flow-channel water-cooled plate of the energy storage converter as described in claim 1, characterized in that: The width of the module's distribution channel gradually decreases along the coolant flow direction.

6. The series-flow-channel water-cooled plate of the energy storage converter as described in claim 1, characterized in that: The reactor flow channel (14) is provided with several shunt plates, which divide the reactor flow channel (14) into several reactor shunt channels. The shunt plates are perpendicular to the fins (7).

7. The series-flow-channel water-cooled plate of the energy storage converter as described in claim 1, characterized in that: The module area flow channel (10) covers the entire IGBT module installation area (4), and the reactor area flow channel (14) covers the entire reactor installation area (5).

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