Energy storage converter and energy storage system

Abstract

The invention provides an energy storage converter and an energy storage system, and relates to the technical field of energy storage. The energy storage converter comprises a case, a cold plate, a fan, a radiator and a partition assembly, the fan, the radiator and the partition assembly are located in the case, the cold plate is installed on a case body of the case, and the radiator makes contact with the cold plate. The fan, the radiator and the partition assembly divide the case into a first heat dissipation cavity and a second heat dissipation cavity, an air outlet of the fan is located in the first heat dissipation cavity, an air inlet of the radiator is located in the first heat dissipation cavity, and an air outlet of the radiator is located in the second heat dissipation cavity. And the fan is used for driving air in the first radiating cavity to enter the radiator through the air inlet of the radiator and enter the second radiating cavity through the air outlet of the radiator. According to the energy storage converter provided by the invention, by adopting the design, the heat dissipation condition in the cavity of the case can be effectively improved, so that the heat dissipation performance of the whole energy storage converter can be improved, and the operation reliability of the energy storage converter is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage converter and an energy storage system. Background Art

[0002] In energy storage scenarios, power conversion systems (PCS) can be used to convert the DC power output by the battery pack into AC power for output to the grid, or to convert the AC power from the grid into DC power for input to the battery pack. Therefore, PCS plays a vital role in the conversion of voltage, current and power in energy storage scenarios.

[0003] As the energy density of energy storage systems increases, the power output requirements for PCS are also getting higher and higher, which causes a sharp increase in the heat generated by PCS during operation. In order to ensure that PCS can operate safely and efficiently, the heat generated needs to be dissipated in a timely manner. Summary of the invention

[0004] The present application provides an energy storage converter and an energy storage system, which improve the heat dissipation conditions inside the cavity of the energy storage converter, thereby improving the heat dissipation performance of the energy storage converter and improving the operating stability of the energy storage system.

[0005] In the first aspect, the present application provides an energy storage converter, which includes a chassis, a cold plate, a fan, a radiator and a baffle assembly, wherein the fan, the radiator and the baffle assembly are located in the chassis, the cold plate is installed on the chassis body, and the radiator is in contact with the cold plate. The fan, the radiator and the baffle assembly separate the chassis into a first heat dissipation cavity and a second heat dissipation cavity, and the air outlet of the fan is located in the first heat dissipation cavity. The air inlet of the radiator is located in the first heat dissipation cavity, and the air outlet of the radiator is located in the second heat dissipation cavity. In this way, the fan can be used to drive the air in the first heat dissipation cavity to enter the radiator through the air inlet of the radiator, and enter the second heat dissipation cavity through the air outlet of the radiator. By adopting the heat dissipation scheme of the energy storage converter provided by the present application, the cooling of the radiator by the cold plate can be used to achieve the cooling of the air flowing through the radiator, thereby effectively reducing the overall temperature of the air in the chassis of the energy storage converter, which is conducive to improving the heat dissipation conditions of each device in the chassis, thereby improving the heat dissipation performance of the energy storage converter, so as to improve the operating safety of the device, and to improve the power density of the energy storage converter.

[0006] In a possible implementation of the present application, the energy storage converter also includes a first type of device and a second type of device, the first type of device is arranged in a first heat dissipation cavity, and the second type of device is arranged in a second heat dissipation cavity. When the energy storage converter is operating normally, the heat generated by the first type of device per unit time is greater than the heat generated by the second type of device. In this way, the high-speed flow of air at the air outlet of the fan can be used to dissipate heat for the first type of device, thereby ensuring the safe operation of the first type of device. In addition, the low-temperature air after heat exchange with the radiator can be used to cool the second type of device to meet the heat dissipation requirements of the second type of device.

[0007] In a possible implementation of the present application, the cold plate includes a coolant flow channel, the coolant flow channel is used for the circulation of coolant, and the coolant is used for heat exchange with the first type of device, the second type of device and the radiator. And the coolant flows through the positions corresponding to the radiator, the first type of device and the second type of device in the coolant flow channel in sequence. That is to say, in the present application, compared with the first type of device and the second type of device, the radiator is located upstream of the flow direction of the coolant in the coolant flow channel. Therefore, the coolant with a lower temperature in the cold plate can be used to achieve effective cooling of the radiator.

[0008] In the present application, the chassis includes a top wall and a bottom wall that are arranged opposite to each other, and the cold plate is installed on the bottom wall. The interval between the baffle assembly and the top wall is smaller than the interval between the radiator and the top wall. In this way, under the baffle effect of the baffle assembly, it is beneficial to achieve directional flow of air in the cavity of the chassis, thereby improving the uniformity of the airflow in the cavity of the chassis to avoid the generation of hot spots in the cavity.

[0009] In addition, the barrier assembly includes a radiator hood, part of which is located in the first heat dissipation cavity, and the other part is located in the second heat dissipation cavity. The radiator hood is arranged on the radiator along the direction from the top wall to the bottom wall. In this way, the radiator hood can be used to gather the air flowing through the radiator, which is conducive to the full contact and heat exchange between the air and the radiator, thereby improving the utilization rate of the radiator cold source.

[0010] In a possible implementation of the present application, along the direction from the air outlet of the radiator to the air inlet of the radiator, the radiator hood includes a first port and a second port, the projection of the first port covers the projection of the second port, and the projection area of ​​the first port is larger than the projection area of ​​the second port. In this way, the radiator hood can converge the air entering the radiator to improve the heat exchange efficiency between the air and the radiator. It is also beneficial to increase the coverage area of ​​the lower temperature air blown out from the air outlet of the radiator in the second heat dissipation cavity, thereby facilitating the improvement of the uniformity of the temperature of the second heat dissipation cavity to avoid the generation of local hot spots.

[0011] In a possible implementation of the present application, the distance between the barrier component and the top wall is less than or equal to the minimum distance between the air outlet of the fan and the top wall, so that the barrier component can block the air in the first heat dissipation cavity and the second heat dissipation cavity, so that under the drive of the fan, most of the air in the first heat dissipation cavity can flow to the radiator, which is conducive to improving the heat exchange efficiency between the air in the case and the radiator.

[0012] In a possible implementation of the present application, the baffle assembly further includes a first baffle and a second baffle, the first baffle being located between the second baffle and the radiator, and the projection of the second baffle covering at least part of the projection of the radiator along the direction from the air outlet of the radiator to the air inlet of the radiator. In addition, the case body of the chassis further includes a side wall, the side wall being located between the top wall and the bottom wall; the first baffle, the second baffle, the radiator and the side wall enclose a second heat dissipation cavity, and the second baffle, the fan and the side wall enclose a third heat dissipation cavity, the third heat dissipation cavity is connected to the second heat dissipation cavity, and the air inlet of the fan is located in the third heat dissipation cavity. In this way, the air cooled by the radiator can circulate along a directional path from the second heat dissipation cavity to the third heat dissipation cavity, which is conducive to improving the uniformity of the temperature in the chassis, and is conducive to reducing the high temperature points in the chassis of the energy storage inverter, thereby improving the heat dissipation conditions of various components in the chassis of the energy storage inverter.

[0013] In a possible implementation of the present application, the second baffle includes a first end and a second end, and the first end is closer to the fan than the second end. In the direction from the first end to the second end, the distance from the second end to the side wall of the chassis is less than or equal to half of the distance from the first end to the side wall of the chassis. In this way, under the blocking effect of the second baffle, the air flowing to the second heat dissipation cavity through the radiator can enter the third heat dissipation cavity through the gap between the second end of the second baffle and the side wall, which is conducive to increasing the circulation range of the air entering the third heat dissipation cavity, so as to help reduce the high temperature point in the chassis of the energy storage converter.

[0014] In the present application, the interval between the second baffle and the top wall is less than or equal to the minimum distance from the air inlet of the fan to the top wall. In this way, under the blocking effect of the second baffle, the air in the third heat dissipation cavity can flow to the air inlet of the fan in a direction, so as to improve the circulation efficiency of the air in the chassis.

[0015] In a possible implementation of the present application, the energy storage converter further includes a third type of device, and the third type of device is disposed in the third heat dissipation cavity. When the energy storage converter is operating normally, the allowable ambient temperature of the third type of device is lower than the allowable ambient temperature of the first type of device. Since the air entering the third heat dissipation cavity has been cooled by the radiator, the ambient temperature in the third heat dissipation cavity is relatively low, thereby meeting the operating requirements of the third type of device.

[0016] The present application does not limit the specific types of various types of devices. Exemplarily, the first type of devices includes at least one of relays or inductors, and the second type of devices includes at least one of thin film capacitors or control chips.

[0017] In a possible implementation of the present application, the radiator includes a plurality of sub-radiators, a thermal interface material layer is provided between the plurality of sub-radiators and the cold plate, and the plurality of sub-radiators and the cold plate are connected by bolts. This facilitates the control of the flatness between each sub-radiator and the cold plate, thereby improving the tightness of the radiator and the cold plate through the thermal interface material layer, which is conducive to improving the heat exchange efficiency between the radiator and the cold plate.

[0018] In a possible implementation of the present application, the radiator includes a pipeline, and the pipeline is connected to the coolant flow channel of the cold plate, and the pipeline and the coolant flow channel can both be used for the circulation of the coolant. In this way, the circulation of the coolant in the pipeline of the radiator can be used to achieve heat exchange with the air in the cavity of the chassis, which can effectively reduce the thermal resistance of the coolant to the air in the cavity of the chassis, thereby facilitating the improvement of the cooling efficiency of the radiator on the air in the cavity.

[0019] In addition, the radiator also includes radiating fins, which are connected to the outer wall of the pipeline to further increase the heat exchange area between the radiator and the air in the cavity, thereby facilitating the reduction of the ambient temperature in the cavity of the chassis of the energy storage converter, so as to achieve the purpose of improving the heat dissipation conditions of various components in the chassis.

[0020] In the second aspect, the present application also provides an energy storage system, which includes a battery pack, a liquid cooling system, and the energy storage inverter of the first aspect, wherein the energy storage inverter is used to convert AC power into DC power and provide it to the battery pack for storage, or to convert DC power from the battery pack into AC power for output. The liquid cooling system is used to provide cooling liquid for the cold plate. Since the energy storage inverter has better heat dissipation performance in the energy storage system provided in the present application, it is conducive to improving the operating stability of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a three-dimensional structure of an energy storage converter provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of a three-dimensional structure of an energy storage converter provided in an embodiment of the present application;

[0023] Figure 3 for Figure 2 A top view of the energy storage converter provided;

[0024] Figure 4 Another structural schematic diagram of the energy storage converter provided in the embodiment of the present application;

[0025] Figure 5 A top view of the energy storage converter provided in an embodiment of the present application;

[0026] Figure 6 Another structural schematic diagram of the energy storage converter provided in the embodiment of the present application;

[0027] Figure 7 A schematic diagram of the distribution of various components on a cold plate provided in an embodiment of the present application;

[0028] Figure 8 A schematic diagram of a structure of a coolant flow channel design for a cold plate provided in an embodiment of the present application;

[0029] Fig. 9 A schematic diagram of the structure of a radiator provided in an embodiment of the present application;

[0030] Fig.10 Another structural schematic diagram of the energy storage converter provided in the embodiment of the present application;

[0031] Fig.11 Another structural schematic diagram of a radiator provided in an embodiment of the present application;

[0032] Fig.12 A schematic diagram of the structure of the heat dissipation fin provided in an embodiment of the present application;

[0033] Fig.13 for Fig.11 An enlarged view of the local structure at A of the radiator is provided.

[0034] Reference numerals:

[0035] 1000-energy storage system; 100-cabinet; 200-battery pack; 300-energy storage converter; 400-liquid cooling system;

[0036] 1-chassis; 101-sheet metal box; 1011-side wall; 1012-bottom wall; 11-first heat dissipation cavity; 12-second heat dissipation cavity; 13-third heat dissipation cavity;

[0037] 2-cold plate; 21-coolant flow channel; 3-fan; 31-air outlet of the fan; 32-air inlet of the fan; 33-fan housing; 4-radiator;

[0038] 41-air inlet of radiator; 42-air outlet of radiator; 44-pipeline; 45-heat dissipation fin;

[0039] 5-blocking assembly; 51-first baffle; 52-radiator hood; 521-first port; 522-second port; 53-second baffle;

[0040] 531 - first end; 532 - second end; 61 - first type of device; 62 - second type of device; 63 - third type of device; 71 - first circuit board;

[0041] 72 - second circuit board; 73 - third circuit board; 74 - fourth circuit board; 8 - partition. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments described herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all illustrated by taking the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings of the embodiments of the present application are only used to illustrate the relative position relationship, and they do not represent the true proportion.

[0043] It should be noted that specific details are described in the following description to facilitate understanding of the present application. However, the present application can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific implementation methods disclosed below.

[0044] In order to facilitate the understanding of the energy storage converter provided by the present application, its application scenarios are first introduced below. The energy storage converter can be used in an energy storage system. Figure 1 , Figure 1 An architecture diagram of an energy storage system provided in an embodiment of the present application. The energy storage system 1000 may include a cabinet 100, a battery pack 200, and an energy storage converter 300. Both the battery pack 200 and the energy storage converter 300 may be accommodated in the cabinet 100. The battery pack 200 is a basic unit for the energy storage system 1000 to store and release electric energy. The energy storage converter 300 may be used to convert AC power into DC power and then provide it to the battery pack 200 for storage, or to convert DC power from the battery pack 200 into AC power for output.

[0045] In order to realize the power conversion function, a plurality of power electronic devices are usually arranged in the chassis of the energy storage converter 300, such as power modules, inductors, electrolytic capacitors or relays, etc. These power electronic devices will generate a large amount of heat during operation. If these power electronic devices cannot be cooled in time, their temperature may exceed the allowable temperature, thereby affecting the performance of the power electronic devices, and in severe cases, affecting the normal use of the energy storage converter 300, and further affecting the normal operation of the energy storage system 1000.

[0046] In the current heat dissipation solution for the energy storage converter 300, Figure 1 As shown, the energy storage system 1000 may also include a liquid cooling system 400, which is used to provide cooling liquid for the cold plate in the energy storage converter 300. Then, the power modules and inductors in the chassis of the energy storage converter 300, which generate a large amount of heat, can achieve heat dissipation by bonding the shell to the cold plate, and the heat dissipation effect is better. The heat dissipation of other components in the chassis of the energy storage converter 300 is achieved by using a fan to circulate and turbulently flow the air in the chassis. However, since the heat dissipation in the chassis is only achieved by heat exchange between the wall of the chassis and the outside world, its heat dissipation capacity is low, so the overall temperature of the air in the chassis is still high, which threatens the reliability of the above-mentioned components that use the circulatory turbulence of the air in the chassis to achieve heat dissipation.

[0047] In view of this, the energy storage converter provided in the embodiment of the present application is provided with a heat sink capable of cooling air in the chassis to reduce the overall temperature of the air in the cavity of the chassis, thereby improving the heat dissipation conditions of various components in the chassis of the energy storage converter, so as to enhance the heat dissipation performance of the energy storage converter. The energy storage converter provided in the embodiment of the present application will be specifically described below in conjunction with the accompanying drawings.

[0048] Reference Figure 2 , Figure 2 A schematic diagram of a three-dimensional structure of an energy storage inverter provided in an embodiment of the present application. The energy storage inverter includes a chassis 1, a cold plate 2, a fan 3, a radiator 4 and a baffle assembly 5. Among them, the cold plate 2 is installed on the case of the chassis 1. In a specific implementation, the case of the chassis 1 includes a mounting hole, the cold plate 2 is installed in the mounting hole, and the cold plate 2 is fixedly connected to the case of the chassis 1. The connection method can be but is not limited to welding, so that the cold plate 2 and the case of the chassis 1 together form a cavity of the chassis 1.

[0049] In practical applications, the chassis 1 may include a sheet metal box 101 and a cover plate. The sheet metal box 101 may include a plurality of sequentially connected side walls 1011 and a bottom wall 1012. The cover plate is disposed on the sheet metal box 101 in a direction toward the bottom wall 1012. That is, the cover plate is disposed opposite to the bottom wall 1012, and the cover plate may serve as the top wall of the chassis 1. It is worth mentioning that in order to facilitate the display of the structure of the energy storage converter, Figure 2 Based on this, it can be understood that the above-mentioned mounting holes can be opened on the bottom wall 1012 of the sheet metal box 101, and the cold plate 2, the sheet metal box 101 and the cover plate together form the box body of the chassis 1.

[0050] From the above description of the structure of the chassis 1 , it can be seen that in the present application, the top wall and the bottom wall 1012 of the chassis 1 are arranged opposite to each other, and the side wall is located between the top wall and the bottom wall 1012 .

[0051] You can continue to refer to Figure 2The fan 3 , the radiator 4 and the baffle assembly 5 are all located in the chassis 1 , and the fan 3 , the radiator 4 and the baffle assembly 5 separate the chassis 1 into a first heat dissipation cavity 11 and a second heat dissipation cavity 12 .

[0052] In addition, refer to Figure 3 , Figure 3 for Figure 2 A top view of the energy storage converter is provided. In the present application, the air outlet 31 of the fan is located in the first heat dissipation cavity 11, the air inlet 41 of the radiator is located in the first heat dissipation cavity 11, and the air outlet 42 of the radiator is located in the second heat dissipation cavity 12. In the present application, the fan 3 can be used to drive the air in the first heat dissipation cavity 11 to enter the radiator 4 through the air inlet 41 of the radiator, and then enter the second heat dissipation cavity 12 through the air outlet 42 of the radiator after heat exchange with the radiator 4.

[0053] Since the cold plate 2 can use the flow of coolant to achieve heat dissipation with the device, in the embodiment of the present application, the radiator 4 is in contact with the cold plate 2 to achieve heat exchange between the radiator 4 and the cold plate 2, so that the radiator 4 can be cooled by the cold plate 2. In this way, the air in the first heat dissipation cavity 11 will be cooled when entering the radiator 4, and the cooled air will then enter the second heat dissipation cavity 12, and then blown out to the first heat dissipation cavity 11 by the fan 3, so that the air circulation in the chassis 1 can be achieved.

[0054] It can be understood that by adopting the heat dissipation solution provided in the present application, the cold plate 2 can be used to cool the radiator 4 to achieve cooling of the air flowing through the radiator 4, thereby effectively reducing the overall temperature of the air in the chassis 1 of the energy storage inverter, which is beneficial to improving the heat dissipation conditions of each component in the chassis 1, so as to enhance the operating safety of the components and to enhance the power density of the energy storage inverter.

[0055] As mentioned above, the fan 3, the heat sink 4 and the baffle assembly 5 separate the chassis 1 into the first heat dissipation cavity 11 and the second heat dissipation cavity 12. When specifically configured, the baffle assembly 5 may include multiple components. Figure 2 In this embodiment, the baffle assembly 5 includes a first baffle 51, which is connected to the fan housing 33 and extends to the radiator 4, so that the fan 3, the first baffle 51 and the radiator 4 jointly separate the chassis 1 into a first heat dissipation cavity 11 and a second heat dissipation cavity 12.

[0056] You can continue to refer to Figure 2 In the present application, part of the first baffle 51 can be located on one side of the radiator 4 close to the top wall, so that under the drive of the fan 3, most of the air in the first heat dissipation cavity 11 can pass through the radiator 4 into the second heat dissipation cavity 12, which is beneficial to improving the heat exchange efficiency between the air in the chassis 1 and the radiator 4.

[0057] In addition, if Figure 2 As shown, in this embodiment, the distance between the first baffle plate 51 and the top wall is less than or equal to the distance between the air outlet 31 of the fan and the top wall, so that the first baffle plate 51 can block the air in the first heat dissipation cavity 11 and the second heat dissipation cavity 12, so that under the drive of the fan 3, most of the air in the first heat dissipation cavity 11 can flow to the radiator 4.

[0058] In practical applications, the fan 3 can be placed on the bottom wall, and the baffle assembly 5 can also be connected to the bottom wall 1012, then along the direction from the top wall to the bottom wall 1012, that is, Figure 2 In the Y direction, the height of the barrier component 5 can be greater than the height of the fan 3, so that the distance between the entire barrier component 5 and the top wall is less than or equal to the minimum distance from the fan outlet 31 to the top wall, so as to enhance the barrier effect of the barrier component 5.

[0059] You can continue to refer to Figure 2 The baffle assembly 5 may also include a radiator hood 52. Figure 3 As shown, part of the radiator hood 52 is located in the first radiator cavity 11, and another part of the radiator hood 52 is located in the second radiator cavity 12. Figure 2 In the Y direction shown in FIG, the radiator hood 52 is provided on the radiator 4. In addition, the portion of the first baffle 51 located on the side close to the top wall of the radiator 4 mentioned above can be located on the side close to the top wall of the radiator hood 52. In this way, the radiator hood 52 can be used to converge the air flowing through the radiator 4, which is conducive to sufficient contact and heat exchange between the air and the radiator 4, thereby improving the utilization rate of the cold source of the radiator 4.

[0060] In addition, you can continue to refer to Figure 3 , along the direction from the air outlet 42 of the radiator to the air inlet 41 of the radiator, that is, Figure 3 In the X direction, the radiator hood 52 includes a first port 521 and a second port 522, wherein, along the X direction, the projection of the first port 521 covers the projection of the second port 522, and the projection area of ​​the first port 521 is larger than the projection area of ​​the second port 522. In this way, the radiator hood 52 can converge the air entering the radiator 4, so as to improve the heat exchange efficiency between the air and the radiator 4. In addition, it is also beneficial to increase the coverage area of ​​the lower temperature air blown out by the air outlet 42 of the radiator in the second heat dissipation cavity 12, so as to improve the uniformity of the temperature of the second heat dissipation cavity 12, so as to avoid the generation of local hot spots.

[0061] It is worth mentioning that in a possible embodiment of the present application, along the direction from the air outlet 42 of the radiator to the air inlet 41 of the radiator, the projected area of ​​the air outlet 42 of the radiator may also be larger than the projected area of ​​the air inlet 41 of the radiator, so that the air inlet 41 of the radiator can converge the air entering the radiator 4 from the first heat dissipation cavity 11, and make the air cooled by the radiator 4 cover a wider range when blown out from the air outlet 42 of the radiator, so as to improve the heat dissipation environment of the components in the chassis 1.

[0062] It can be understood that in the present application, the spacing between the entire baffle assembly 5 and the top wall can be smaller than the spacing between the radiator 4 and the top wall, which can realize the directional flow of air in the cavity of the chassis 1, thereby helping to improve the uniformity of the airflow in the cavity of the chassis 1 to avoid the generation of hot spots in the cavity.

[0063] As described above, the energy storage converter also includes a plurality of devices, which are contained in the chassis 1. In order to effectively dissipate the heat of the plurality of devices, they can be arranged in the chassis 1 according to the heat dissipation requirements of each device. Figure 4 , Figure 4 Another structural schematic diagram of the energy storage converter provided in the embodiment of the present application. In the embodiment of the present application, the above-mentioned multiple devices may include a first type of device 61 and a second type of device 62, wherein, when the energy storage converter is operating normally, the heat generated by the first type of device 61 is greater than the heat generated by the second type of device 62. Considering that the wind speed at the air outlet 31 of the fan is relatively high, the heat exchange efficiency between the fan and the device is relatively high. Therefore, in the present application, the first type of device 61 may be arranged in the first heat dissipation cavity 11 to utilize the high-speed flow of air to achieve heat dissipation of the first type of device 61, thereby ensuring the safe operation of the first type of device 61. In addition, the second type of device 62 is arranged in the second heat dissipation cavity 12, so that the low-temperature air after heat exchange with the radiator 4 can be used to cool the second type of device 62.

[0064] It is understandable that each device in the energy storage converter can be respectively arranged on a corresponding circuit board, for example, Figure 5 As shown, Figure 5 A top view of an energy storage converter provided in an embodiment of the present application. In the present application, the energy storage converter further includes a first circuit board 71, a second circuit board 72 and a third circuit board 73, wherein a portion of the first type of devices 61 is disposed on the first circuit board 71, and another portion of the first type of devices 61 is disposed on the second circuit board 72, then the first circuit board 71 and the second circuit board 72 are also disposed in the first heat dissipation cavity 11. Similarly, if the second type of devices 62 are disposed on the third circuit board 73, then the third circuit board 73 can be disposed in the second heat dissipation cavity 12.

[0065] You can continue to refer to Figure 4 and Figure 5In the embodiment of the present application, the baffle assembly 5 further includes a second baffle 53, and the first baffle 51 is located between the second baffle 53 and the radiator 4. Along the direction from the air outlet 42 of the radiator to the air inlet 41 of the radiator, that is, along the X direction, the projection of the second baffle 53 covers at least part of the projection of the radiator 4.

[0066] In this application, if Figure 5 As shown, the first baffle 51, the second baffle 53, the radiator 4 and the side wall of the case 1 form a second heat dissipation cavity 12, and the second baffle 53, the fan 3 and the side wall of the case 1 form a third heat dissipation cavity 13, the third heat dissipation cavity 13 is connected to the second heat dissipation cavity 12, and the air inlet 32 ​​of the fan is located in the third heat dissipation cavity 13. In this way, the air cooled by the radiator 4 can enter the third heat dissipation cavity 13 after flowing through the second heat dissipation cavity 12, so as to dissipate the heat of the components in the third heat dissipation cavity 13.

[0067] It is worth mentioning that the present application does not limit the number of fans 3, which can be one or at least two. Figure 4 In the embodiment shown, the air inlets of the two fans 3 are separated by a partition plate 8. This is conducive to improving the uniformity of the air intake of the two fans 3, thereby helping to improve the air output of the two fans 3, which is conducive to improving the air circulation efficiency in the chassis 1.

[0068] Figure 6 Another structural schematic diagram of the energy storage converter provided in the embodiment of the present application. Figure 6 In this embodiment, the second baffle 53 includes a first end 531 and a second end 532. The first end 531 is closer to the fan 3 than the second end 532, and along the direction from the first end 531 to the second end 532, the distance from the second end 532 to the chassis 1 is less than or equal to half of the distance from the first end 531 to the side wall of the chassis 1. In this way, under the blocking effect of the second baffle, the air with a lower temperature blown out from the air outlet 42 of the radiator can enter the third heat dissipation cavity 13 through the gap between the second end 532 of the second baffle 53 and the side wall, and then enter the fan 3. This is conducive to increasing the circulation range of the air entering the third heat dissipation cavity 13, so as to reduce the high temperature point in the chassis 1 of the energy storage converter, and to improve the uniformity of the temperature in the chassis 1, thereby improving the heat dissipation conditions of various components in the chassis 1 of the energy storage converter.

[0069] It can be understood from the above description that in the present application, the interval between the second baffle 53 and the top wall is less than or equal to the minimum distance from the air inlet 32 ​​of the fan to the top wall. Under the blocking effect of the second baffle 53, the air in the third heat dissipation cavity 13 can flow to the air inlet 32 ​​of the fan in a direction, so as to improve the circulation efficiency of the air in the chassis 1.

[0070] It is worth mentioning that in the present application, part or all of the baffle assembly 5 may be composed of the original structure in the energy storage converter, such as the shell of some devices with larger dimensions along the direction from the bottom wall 1012 to the top wall, etc., which is conducive to simplifying the structural design of the energy storage converter and reducing its weight. In other embodiments, part or all of the baffle assembly 5 may also be a structure independent of the original structure in the energy storage converter, which is conducive to improving the flexibility of the setting of the baffle assembly 5 and optimizing the flow channel of the airflow formed in the cavity of the chassis 1, so as to improve the heat dissipation effect of the cavity of the chassis 1.

[0071] As can be seen from the above description, in the chassis 1 of the energy storage converter provided in the present application, the temperature of the air after heat exchange with the radiator 4 is relatively low, that is, the temperature of the air in the second heat dissipation cavity 12 and the third heat dissipation cavity 13 is relatively low. Figure 4 and Figure 5 The energy storage converter may further include a third type of device 63. When the energy storage converter works normally, the allowable ambient temperature of the third type of device 63 is lower than the allowable ambient temperature of the first type of device 61. Then, the third type of device 63 is arranged in the third heat dissipation cavity 13. In practical applications, the third type of device 63 may include at least one of an electrolytic capacitor or a control chip.

[0072] It is worth mentioning that in the present application, the allowable ambient temperature refers to the ambient temperature range that the device can withstand when the energy storage converter is working normally.

[0073] In addition, if Figure 5 As shown, the energy storage converter may further include a fourth circuit board 74, and the third type device 63 may be disposed on the fourth circuit board 74, and the fourth circuit board 74 may be disposed in the third heat dissipation cavity 13, so that the fourth circuit board 74 is in a lower temperature environment.

[0074] In the present application, by setting up different cavities for various devices with different requirements for heat dissipation conditions, it is possible to reduce thermal interference between various devices while achieving effective heat dissipation for various devices, and is conducive to the rational use of space in the chassis 1 of the energy storage converter.

[0075] The present application does not specifically limit the first type of device 61 and the second type of device 62. Exemplarily, the first type of device 61 includes at least one of a relay or an inductor, and the second type of device 62 includes at least one of a thin film capacitor or a control chip.

[0076] Reference Figure 7 , Figure 7A schematic diagram of the distribution of various components on the cold plate provided in the embodiment of the present application. In the present application, the cold plate 2 includes a coolant flow channel, which is used for the circulation of coolant, and the coolant can be used to exchange with the first type of components 61, the second type of components 62 and the heat sink 4.

[0077] Considering that the heat dissipation requirements of various components that exchange heat with the cold plate 2 may be different, when designing the coolant flow channel of the cold plate 2, the flow direction of the coolant in the coolant flow channel and the width of each part of the coolant flow channel can be adjusted according to the distribution of components with different heat dissipation requirements on the cold plate 2. In addition, for components with high power consumption such as power modules and inductors, structures such as spoiler teeth can be set in the coolant flow channel to improve the heat exchange efficiency between the components and the cold plate 2 by utilizing the spoiler of the coolant.

[0078] Since the coolant needs to exchange heat with the device during the circulation in the coolant flow channel, it can be understood that the temperature of the coolant located upstream of the coolant flow channel is lower than the temperature of the coolant downstream. Figure 8 , Figure 8 A schematic diagram of a structure of a coolant flow channel design for a cold plate provided in an embodiment of the present application. Figure 8 The arrows in the figure can be used to indicate the flow direction of the coolant in the coolant flow channel. It can be seen that in the present application, the coolant flows in the coolant flow channel in sequence through the positions corresponding to the radiator 4, the first type of device 61 and the second type of device 62. That is, compared with the first type of device 61 and the second type of device 62, the radiator 4 is located upstream of the flow direction of the coolant in the coolant flow channel, so that the coolant with a lower temperature in the cold plate 2 can be used to achieve effective cooling of the radiator 4.

[0079] The present application does not limit the specific configuration of the radiator 4. For example, in a possible embodiment, the radiator 4 may be Fig. 9 The shovel-tooth heat sink shown in FIG. The heat sink 4 can be connected to the cold plate 2 by fasteners such as bolts to achieve heat exchange with the cold plate 2. In addition, a thermal interface material layer such as silicone grease or gel can be provided between the heat sink 4 and the cold plate 2 to improve the heat exchange efficiency between the heat sink 4 and the cold plate 2.

[0080] In addition, in a possible embodiment of the present application, the radiator 4 may include a plurality of sub-radiators, a thermal interface material layer is provided between the plurality of sub-radiators and the cold plate 2, and the plurality of sub-radiators are connected to the cold plate 2 by bolts. This is conducive to improving the convenience of setting the radiator 4, and can facilitate the control of the flatness between each sub-radiator and the cold plate 2, thereby improving the tightness of the radiator 4 and the cold plate 2 through the thermal interface material layer, which is conducive to improving the heat exchange efficiency between the radiator 4 and the cold plate 2.

[0081] Fig.10 Another structural schematic diagram of the energy storage converter provided in the embodiment of the present application. Fig.10 In the illustrated embodiment, the radiator 4 includes a pipe 44, which is in communication with the coolant flow channel 21 of the cold plate 2, so that the pipe 44 and the coolant flow channel 21 are used together for the circulation of the coolant. In this way, the circulation of the coolant in the pipe 44 of the radiator 4 can be used to achieve heat exchange with the air in the cavity of the chassis 1, which can effectively reduce the thermal resistance from the coolant to the air in the cavity of the chassis 1, thereby facilitating the improvement of the cooling efficiency of the radiator 4 on the air in the cavity.

[0082] You can continue to refer to Fig.10 When the pipe 44 of the radiator 4 is specifically connected to the cold plate 2, the pipe mouth of the pipe 44 is welded to the cold plate 2 through the interface on the cold plate 2, so that the pipe 44 is connected to the coolant flow channel 21 of the cold plate 2. It can be seen from the above introduction that the radiator 4 is located upstream of the flow direction of the coolant in the coolant flow channel 21. Therefore, in this embodiment, the pipe mouth of the pipe 44 can be connected to the upstream position of the coolant flow channel 21. In this way, the coolant with a lower temperature entering from the liquid inlet of the cold plate 2 can first flow through the pipe 44 and then flow along the coolant flow channel 21, which can help reduce the temperature of the pipe 44 of the radiator 4, so as to reduce the temperature of the air in the cavity of the chassis 1 of the energy storage inverter.

[0083] In the present application, the pipe 44 of the radiator 4 may be, but is not limited to, Fig.11 The serpentine tube shown in the figure can also be set in other forms, for example, the radiator 4 can be a parallel flow radiator, that is, the pipeline 44 of the radiator 4 includes a plurality of parallel tubes arranged side by side. It is beneficial to increase the heat exchange area between the pipeline 44 and the air in the cavity.

[0084] In addition, you can continue to refer to Fig.10 The radiator 4 may further include a heat dissipation fin 45, which is connected to the outer wall of the pipe 44. In practical applications, the end of the heat dissipation fin 45 is connected to the outer wall of the pipe 44, and the other part protrudes from the outer wall of the pipe 44, which is conducive to increasing the heat exchange area between the radiator 4 and the air in the cavity.

[0085] When specifically setting the heat dissipation fins 45, refer to Fig.12 , Fig.12A schematic diagram of the structure of the heat sink fins provided in an embodiment of the present application. In this embodiment, a plurality of heat sink fins 45 are connected end to end to form a wavy structure, or the heat sink fins 45 are a wavy structure formed by bending the same plate-like structure. In other possible embodiments of the present application, the heat sink fins 45 may also adopt other possible arrangements, such as a plurality of heat sink fins 45 arranged side by side at intervals, etc., which are not listed one by one here, but they should all be understood to fall within the scope of protection of the present application.

[0086] Reference Fig.13 , Fig.13 for Fig.11 The radiator 4 includes a pipe 44 and a partial structure enlarged diagram of the radiator A provided. Fig.12 The heat dissipation fins 45 are shown. Fig.13 As shown, the heat dissipation fins 45 can be arranged in the gap formed between the outer wall surfaces of the pipeline 44, which is beneficial to increase the contact area between the heat dissipation fins 45 and the outer wall surfaces of the pipeline 44, so as to improve the heat exchange efficiency between the heat dissipation fins 45 and the coolant in the pipeline 44, thereby facilitating the improvement of the heat exchange efficiency between the radiator 4 and the air in the cavity of the chassis 1.

[0087] In summary, it can be understood that by adopting the heat dissipation solution of the energy storage inverter provided in the present application, the cold plate 2 can be used to dissipate the heat of the radiator 4 in the chassis 1, thereby achieving cooling of the air flowing through the radiator 4, which can effectively reduce the overall temperature in the cavity of the chassis 1, so that the heat dissipation conditions of the devices in the chassis 1 can be improved, which is conducive to improving the operating reliability of the energy storage inverter.

[0088] In addition, in the above embodiments, the application of the heat dissipation solution provided in the present application in the energy storage inverter is introduced as an example, and the heat dissipation solution can also be applied to power conversion equipment in various fields such as inverters or vehicle power supplies, vehicle motor control units (MCUs), or site blade power supplies. The specific setting method can refer to the above embodiments and will not be repeated here.

[0089] It is worth mentioning that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0090] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An energy storage converter, characterized in that: The invention comprises a chassis, a cold plate, a fan, a radiator and a baffle assembly, wherein the fan, the radiator and the baffle assembly are located in the chassis, wherein: The cold plate is mounted on the case of the chassis, and the heat sink is in contact with the cold plate; The fan, the radiator and the baffle assembly separate the chassis into a first heat dissipation cavity and a second heat dissipation cavity, the air outlet of the fan is located in the first heat dissipation cavity; the air inlet of the radiator is located in the first heat dissipation cavity, and the air outlet of the radiator is located in the second heat dissipation cavity; the fan is used to drive the air in the first heat dissipation cavity to enter the radiator through the air inlet of the radiator, and enter the second heat dissipation cavity through the air outlet of the radiator.

2. The energy storage converter according to claim 1, characterized in that: The energy storage converter also includes a first type of device and a second type of device, wherein the first type of device is arranged in the first heat dissipation cavity, and the second type of device is arranged in the second heat dissipation cavity; when the energy storage converter operates normally, the heat generated by the first type of device per unit time is greater than the heat generated by the second type of device.

3. The energy storage converter according to claim 2, characterized in that: The cold plate includes a coolant flow channel, which is used for the circulation of coolant, and the coolant is used for heat exchange with the first type of components, the second type of components and the radiator; and the coolant flows in the coolant flow channel in sequence through positions corresponding to the radiator, the first type of components and the second type of components.

4. The energy storage converter according to claim 2 or 3, characterized in that: The case body of the chassis comprises a top wall and a bottom wall which are arranged opposite to each other, and the cold plate is installed on the bottom wall; the interval between the baffle assembly and the top wall is smaller than the interval between the radiator and the top wall.

5. The energy storage converter according to claim 4, characterized in that: The baffle assembly includes a radiator hood, a portion of which is located in the first heat dissipation cavity, and another portion of which is located in the second heat dissipation cavity; and along the direction from the top wall to the bottom wall, the radiator hood is arranged on the radiator.

6. The energy storage converter according to claim 5, characterized in that: Along the direction from the air outlet of the radiator to the air inlet of the radiator, the radiator hood includes a first port and a second port, the projection of the first port covers the projection of the second port, and the projection area of ​​the first port is larger than the projection area of ​​the second port.

7. The energy storage converter according to claim 5 or 6, characterized in that: The interval between the baffle assembly and the top wall is less than or equal to the minimum distance from the air outlet of the fan to the top wall.

8. The energy storage converter according to any one of claims 5 to 7, characterized in that: The baffle assembly further includes a first baffle and a second baffle, wherein the first baffle is located between the second baffle and the radiator, and along the direction from the air outlet of the radiator to the air inlet of the radiator, the projection of the second baffle covers at least part of the projection of the radiator; The case body of the chassis further comprises a side wall, wherein the side wall is located between the top wall and the bottom wall; The first baffle, the second baffle, the radiator and the side wall form the second heat dissipation cavity, and the second baffle, the fan and the side wall form a third heat dissipation cavity, the third heat dissipation cavity is connected to the second heat dissipation cavity, and the air inlet of the fan is located in the third heat dissipation cavity.

9. The energy storage converter according to claim 8, characterized in that: The second baffle includes a first end and a second end, the first end is closer to the fan than the second end; along the direction from the first end to the second end, the distance from the second end to the side wall of the chassis is less than or equal to half of the distance from the first end to the side wall of the chassis.

10. The energy storage converter according to claim 8 or 9, characterized in that: The interval between the second baffle and the top wall is less than or equal to the minimum distance from the air inlet of the fan to the top wall.

11. The energy storage converter according to any one of claims 8 to 10, characterized in that: The energy storage converter further includes a third type of device, which is disposed in the third heat dissipation cavity; when the energy storage converter operates normally, the allowable ambient temperature of the third type of device is lower than the allowable ambient temperature of the first type of device.

12. The energy storage converter according to any one of claims 1 to 11, characterized in that: The heat sink comprises a plurality of sub-heat sinks, a thermal interface material layer is arranged between the plurality of sub-heat sinks and the cold plate, and the plurality of sub-heat sinks and the cold plate are connected by bolts.

13. The energy storage converter according to any one of claims 1 to 11, characterized in that: The radiator comprises a pipeline, the pipeline is communicated with the coolant flow channel of the cold plate, and the pipeline and the coolant flow channel are used for the circulation of the coolant.

14. The energy storage converter according to claim 13, characterized in that: The radiator further comprises heat dissipation fins, and the heat dissipation fins are connected to the outer wall surface of the pipeline.

15. An energy storage system, characterized in that: The energy storage system includes a battery pack, a liquid cooling system, and an energy storage inverter as described in any one of claims 1 to 14, wherein the energy storage inverter is used to convert alternating current into direct current and provide it to the battery pack for storage, or to convert direct current from the battery pack into alternating current for output; and the liquid cooling system is used to provide the cooling liquid to the cold plate.

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