Energy storage converter, energy storage system and electric device

Abstract

This application relates to an energy storage converter, an energy storage system, and electrical equipment, and pertains to the field of energy storage technology. The energy storage converter of this application includes a housing and a first fan. The housing includes a first cavity and a second cavity. The first fan is located in the first cavity. The first cavity includes a first region and a second region. The first region is located on the negative pressure side of the first fan, and the second region is located on the positive pressure side of the first fan. The second cavity includes a third region and a fourth region. The housing includes an air inlet structure, an air outlet structure, a first air intake structure, a second air intake structure, a first air outlet structure, and a second air outlet structure. The first region is connected to the outside of the housing via the air inlet structure, the second region is connected to the outside of the housing via the air outlet structure, the second region is connected to the third region via the first air intake structure, the third region is connected to the first region via the first air outlet structure, the second region is connected to the fourth region via the second air intake structure, and the fourth region is connected to the second region via the second air outlet structure. The energy storage converter has relatively high heat dissipation efficiency.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an energy storage converter, an energy storage system and an electrical device. Background Technology

[0002] In related technologies, a power conversion system (PCS) is an electrical device used in energy storage systems to perform functions such as bidirectional energy conversion, system control, and grid interaction. However, the heat dissipation efficiency of power conversion systems still needs improvement. Summary of the Invention

[0003] This application provides an energy storage converter, an energy storage system, and an electrical device to address the technical problem of relatively low heat dissipation efficiency of the energy storage converter.

[0004] In a first aspect, this application provides an energy storage converter, which includes a housing and a first fan. The housing includes a first cavity and a second cavity. The first fan is located in the first cavity. The first cavity includes a first region and a second region. The first region is located on the negative pressure side of the first fan, and the second region is located on the positive pressure side of the first fan. The second cavity includes a third region and a fourth region. The housing includes an air inlet structure, an air outlet structure, a first air intake structure, a second air intake structure, a first air outlet structure, and a second air outlet structure. The first region is connected to the outside of the housing through the air inlet structure. The second region is connected to the outside of the housing through the air outlet structure. The second region and the third region are connected through the first air intake structure. The third region and the first region are connected through the first air outlet structure. The second region and the fourth region are connected through the second air intake structure. The fourth region and the second region are connected through the second air outlet structure.

[0005] Optionally, the housing includes a partition, and the first cavity and the second cavity are separated by the partition. The partition is provided with a first air inlet structure, a second air inlet structure, a first air outlet structure and a second air outlet structure. In the first direction of the energy storage converter, the first air outlet structure and the second air outlet structure are arranged at intervals, and the first air inlet structure and the second air inlet structure are located between the first air outlet structure and the second air outlet structure.

[0006] Optionally, the separator is provided with a fan setting area, in which a first fan is placed. In a first direction, the fan setting area is located between the first air outlet structure and the first air inlet structure, and also between the first air outlet structure and the second air inlet structure. The second air outlet structure is located on the side of the first air inlet structure and the second air inlet structure away from the fan setting area.

[0007] Optionally, the energy storage converter includes at least two first fans, which are distributed along a second direction of the energy storage converter. In the second direction, a first air outlet structure is located between a first air inlet structure and a second air inlet structure, wherein the first direction intersects the second direction.

[0008] Optionally, in the second direction, there is a distance D1 between the first air outlet structure and the first air inlet structure, and a distance D2 between the first air outlet structure and the second air inlet structure, wherein the distance D2 is less than the distance D1.

[0009] Optionally, the flow cross-sectional area of ​​the second air intake structure is larger than that of the first air intake structure.

[0010] Optionally, the second air outlet structure is disposed at one end of the separator near the exhaust structure, and the second air outlet structure is distributed along the second direction, where the first direction intersects the second direction.

[0011] Optionally, the separator is further provided with a fin setting area and an inductor setting area. In the first direction, the fin setting area and the inductor setting area are located between the first air inlet structure and the second air outlet structure, and the fin setting area and the inductor setting area are also located between the second air inlet structure and the second air outlet structure.

[0012] Optionally, at least one of the first air inlet structure, the second air inlet structure, the first air outlet structure, and the second air outlet structure includes a plurality of through holes arranged in an array on the separator.

[0013] Optionally, the energy storage converter also includes a second fan and a third fan, with the second fan located in a third region and the third fan located in a fourth region, and the number of the third fan being greater than the number of the second fan.

[0014] Optionally, the volume of the fourth region is greater than that of the third region, the number of power devices accommodated in the fourth region is greater than that in the third region, the second region and the fourth region are also connected by the first air inlet structure, and the first air inlet structure and the second air inlet structure are spaced apart from the fourth region.

[0015] Optionally, the energy storage converter includes a guide plate disposed in the second cavity, the guide plate being connected to the housing, and the guide plate being located between the third and fourth regions.

[0016] Secondly, this application provides an energy storage system, which may include an energy storage converter and a battery device. The energy storage converter and the battery device are electrically connected. The energy storage converter may be the energy storage converter described above regarding the first aspect of this application. The battery device may store electrical energy or output electrical energy.

[0017] Thirdly, this application provides an electrical device that may include the energy storage converter described above in relation to the first aspect of this application. The electrical device may be a vehicle, aircraft, ship, household appliance, or industrial appliance, or other equipment or apparatus that requires electrical energy.

[0018] In this application, the energy storage converter may include several power devices, with a few located in the first chamber and the majority in the second chamber. When the power devices are in operation, they generate heat and rise in temperature. A first fan generates airflow for heat dissipation, transferring the heat generated by the power devices from inside the chamber to outside. When the first fan is activated, under the negative pressure suction force generated by the fan, airflow outside the chamber can enter the first chamber through the air inlet structure, and then the airflow in the first chamber can be drawn to the second chamber by the fan. Under the positive pressure driving force generated by the first fan, a portion of the airflow in the second chamber can flow to the outside of the chamber through the exhaust structure, another portion of the airflow in the second chamber can enter the third chamber through the first air inlet structure, and yet another portion of the airflow in the second chamber can enter the fourth chamber through the second air inlet structure. Under the negative pressure suction force generated by the first fan, the airflow in the third chamber can re-enter the first chamber through the first air outlet structure and then re-enter the second chamber. Under the positive pressure driving force generated by the first fan, the airflow in the fourth region can re-enter the second region through the second exhaust structure and then flow to the outside of the enclosure through the exhaust structure. Therefore, the heat in the first and second cavities can be transferred to the outside of the enclosure by the airflow generated by the first fan. In other words, the heat in the first, second, third, and fourth regions can be transferred to the outside of the enclosure by the airflow generated by the first fan, keeping the temperature of the power devices within the normal operating temperature range, thus ensuring reliable operation of the energy storage converter. The heat in different regions of the second cavity can be transferred to the first cavity and the outside of the enclosure by the corresponding airflow. Furthermore, the heat carried by the airflow in the third region is unlikely to directly affect the power devices in the fourth region, and similarly, the heat carried by the airflow in the fourth region is unlikely to directly affect the power devices in the third region. Therefore, some energy storage converters of this application have the advantage of high heat dissipation efficiency.

[0019] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1A cross-sectional view of the enclosure and first fan of an energy storage converter in one embodiment;

[0022] Figure 2 This is a schematic diagram showing the distribution of the third and fourth regions of the second cavity of the housing in one embodiment;

[0023] Figure 3 This is a schematic diagram showing the distribution of the third and fourth regions of the second cavity of the housing in another embodiment;

[0024] Figure 4 This is a schematic diagram showing the distribution of the third and fourth regions of the second cavity of the housing in another embodiment;

[0025] Figure 5 This is a schematic diagram of the structure of the separator, the first air inlet structure, the second air inlet structure, the first air outlet structure, the second air outlet structure, and the fan mounting area in one embodiment;

[0026] Figure 6 This is a schematic diagram of the structure of the separator, the first air inlet structure, the second air inlet structure, the first air outlet structure, the second air outlet structure, and the fan mounting area in another embodiment;

[0027] Figure 7 A schematic diagram of the structure of the separator, the first air inlet structure, the second air inlet structure, the first air outlet structure, the second air outlet structure, and the fan mounting area in another embodiment;

[0028] Figure 8 A schematic diagram of the structure of the separator, the first air inlet structure, the second air inlet structure, the first air outlet structure, the second air outlet structure, and the fan mounting area in another embodiment;

[0029] Figure 9 This is a schematic diagram of the structure of a first fan, a separator, a first air inlet structure, a second air inlet structure, a first air outlet structure, and a second air outlet structure in one embodiment;

[0030] Figure 10 This is a schematic diagram of the structure of a first fan, a separator, a first air inlet structure, a second air inlet structure, a first air outlet structure, a second air outlet structure, an inductor setting area, and a fin setting area in one embodiment.

[0031] Figure 11 This is a schematic diagram of the structure of a first fan, a separator, a first air inlet structure, a second air inlet structure, a first air outlet structure, a second air outlet structure, an inductor, heat sink fins, and a fan bracket in one embodiment.

[0032] Figure 12This is a schematic diagram of the structure of the partition, third sidewall, second cavity, first air inlet structure, second air inlet structure, first air outlet structure, second air outlet structure, second fan, third fan and guide plate in one embodiment;

[0033] Figure 13 This is a schematic diagram of the structure of the partition, third sidewall, second cavity, first air inlet structure, second air inlet structure, first air outlet structure, second air outlet structure, second fan, third fan and guide plate in another embodiment;

[0034] Figure 14 This is a schematic diagram of the enclosure of an energy storage converter in one embodiment.

[0035] Figure 15 for Figure 14 A schematic diagram of the energy storage converter housing from another perspective;

[0036] Figure 16 This is a schematic diagram of the exploded structure of an energy storage converter in one embodiment;

[0037] Figure 17 for Figure 16 A schematic diagram of the exploded structure of the energy storage converter from another perspective.

[0038] Explanation of reference numerals in the attached drawings: 10-Energy storage converter, 1-Casing, 11-First shell, 111-First cavity, 1111-First region, 1112-Second region, 112-Air inlet structure, 113-Exhaust structure, 114-First sidewall, 114a-Second sidewall, 115-First opening, 12-Second shell, 121-Second cavity, 1211-Third region, 1212-Fourth region, 122-Separator, 1221-First air inlet structure, 1222-Second air inlet structure, 1223-First air outlet Structure, 1224-Second air outlet structure, 1225-Fan setting area, 1226-Fin setting area, 1227-Inductor setting area, 123-Third side wall, 124-Second opening, 13-Cover, 2-First fan, 21-Negative pressure side, 22-Positive pressure side, 2a-Fan bracket, 3-Heat dissipation fins, 4-Inductor, 5-Second fan, 6-Third fan, 61-First airflow guiding fan, 62-Second airflow guiding fan, 63-Third airflow guiding fan, 7-Airflow guiding plate, 71-First airflow guiding plate, 72-Second airflow guiding plate. Detailed Implementation

[0039] To better understand the technical solutions of this application, the embodiments of this application are described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application. The terminology used in the embodiments of this application is for the purpose of describing specific embodiments only, and is not intended to limit this application. The singular forms "a," "described," and "the" used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should be understood that the term "and / or" used herein is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship. Furthermore, the ordinal numbers "first," "second," "third," "fourth," "fifth," and "sixth" in this document are used to avoid confusion of constituent elements, and are not necessarily intended to limit the quantity. In the accompanying figures, each pair of directions among the up / down, left / right, and front / back directions is perpendicular to each other. The front / back direction can be understood as the first direction, the left / right direction as the second direction, and the up / down direction as the third direction. The up / down direction can also be understood as the height direction. Each pair of directions X, Y, and Z in the accompanying figures can be perpendicular to each other.

[0040] Firstly, this application provides some embodiments of energy storage converters, relating to the field of energy storage technology. In some embodiments, please refer to... Figure 1As shown, the energy storage converter 10 may include a housing 1 and a first fan 2. The housing 1 may include a first cavity 111 and a second cavity 121. The first fan 2 may be located within the first cavity 111. The first cavity 111 may include a first region 1111 and a second region 1112. The first region 1111 may be located on the negative pressure side 21 of the first fan 2, and the second region 1112 may be located on the positive pressure side 22 of the first fan 2. The second cavity 121 may include a third region 1211 and a fourth region 1212. The housing 1 may include an air inlet structure 112, an air outlet structure 113, a first air intake structure 1221, a second air intake structure 1222, and a first air outlet structure. 1223 and the second air outlet structure 1224, the first area 1111 can be connected to the outside of the box 1 via the air inlet structure 112, the second area 1112 can be connected to the outside of the box 1 via the air outlet structure 113, the second area 1112 and the third area 1211 can be connected via the first air inlet structure 1221, the third area 1211 and the first area 1111 can be connected via the first air outlet structure 1223, the second area 1112 and the fourth area 1212 can be connected via the second air inlet structure 1222, and the fourth area 1212 and the second area 1112 can be connected via the second air outlet structure 1224.

[0041] In some embodiments, the energy storage converter 10 may include a number of power devices (not shown in the figure), with a few power devices located in the first cavity 111 and a majority of power devices located in the second cavity 121. When the power devices are in operation, they generate heat and become heated. The first fan 2 can generate airflow for heat dissipation, that is, the airflow can transfer the heat generated by the power devices from inside the housing 1 to outside the housing 1. When the first fan 2 is activated, under the negative pressure suction force generated by the first fan 2, the airflow outside the housing 1 can enter the first region 1111 in the direction F1 through the air inlet structure 112, and then the airflow in the first region 1111 can be drawn by the first fan 2 to the second region 1112. Under the positive pressure driving force generated by the first fan 2, a portion of the airflow in the second region 1112 can flow to the outside of the housing 1 via the exhaust structure 113 in direction F2. Another portion of the airflow in the second region 1112 can enter the third region 1211 via the first air inlet structure 1221 in direction F3. Yet another portion of the airflow in the second region 1112 can enter the fourth region 1212 via the second air inlet structure 1222 in direction F5. Under the negative pressure suction force generated by the first fan 2, the airflow in the third region 1211 can re-enter the first region 1111 via the first air outlet structure 1223 in direction F4 and then re-enter the second region 1112. Under the positive pressure driving force generated by the first fan 2, the airflow in the fourth region 1212 can re-enter the second region 1112 via the second air outlet structure 1224 in direction F6 and then flow to the outside of the housing 1 via the exhaust structure 113 in direction F2. Therefore, the heat in the first cavity 111 and the heat in the second cavity 121 can be transferred to the outside of the housing 1 by the airflow generated by the first fan 2. In other words, the heat in the first region 1111, the heat in the second region 1112, the heat in the third region 1211 and the heat in the fourth region 1212 can be transferred to the outside of the housing 1 by the airflow generated by the first fan 2, so that the temperature of the power device is within the normal operating temperature range, thereby enabling the energy storage converter 10 to work reliably.

[0042] In some embodiments, please refer to Figure 1 As shown, a certain distance is required between the first fan 2 and the air inlet structure 112. This is because the turbulence and eddies generated when the airflow passes through the air inlet structure 112 increase airflow resistance. If there is no gap or the distance between the first fan 2 and the air inlet structure 112 is too small, the airflow resistance will easily reduce the effective airflow of the first fan 2, resulting in a relatively large workload and noise level, which will reduce the service life of the first fan 2. Therefore, a first region 1111 is also provided between the first fan 2 and the air inlet structure 112.

[0043] Under the aforementioned condition that "there needs to be a certain distance between the first fan 2 and the air inlet structure 112," it can also be said that under the condition that "a first region 1111 is also provided between the first fan 2 and the air inlet structure 112," if the second cavity 121 does not have the "division of the third region 1211 and the fourth region 1212" described above, if the second region 1112 and the second cavity 121 are connected by the second air inlet structure 1222 and the second air outlet structure 1224 respectively, and if the housing 1 does not have the first air inlet structure 1221 and the first air outlet structure 1223 described above, even if the airflow in the second region 1112 can enter the second cavity 121 through the second air inlet structure 1222, and then enter the second region 1112 from the second cavity 121 through the second air outlet structure 1224, since the second air inlet structure 1222 is located on the positive pressure side 22 of the first fan 2, In other words, since the second air inlet structure 1222 is located on the side of the first fan 2 away from the air inlet structure 112 and the first region 1111, the airflow is more likely to flow towards the second air outlet structure 1224 after entering the second cavity 121 through the second air inlet structure 1222. The flow rate of the airflow that can pass through the sub-region of the second cavity 121 near the air inlet structure 112 is relatively small. In other words, the flow rate of the airflow that can pass through the sub-region of the second cavity 121 near the first region 1111 is relatively small. The heat of the power devices located in the sub-region of the second cavity 121 near the air inlet structure 112 or the first region 1111 is not easily transferred by the airflow to the second region 1112 and the outside of the housing 1. This makes it easy for the power devices located in the sub-region of the second cavity 121 near the air inlet structure 112 or the first region 1111 to heat up significantly, which in turn makes it easy for the energy storage converter to have a relatively low operating reliability.

[0044] Under the aforementioned condition that "there needs to be a certain size range of interval distance between the first fan 2 and the air inlet structure 112," it can also be said that under the condition that "a first region 1111 is also provided between the first fan 2 and the air inlet structure 112," if the second cavity 121 does not have the aforementioned "division of the third region 1211 and the fourth region 1212," if the second region 1112 and the second cavity 121 are connected by the first air inlet structure 1221, if the second cavity 121 and the first region 1111 are connected by the first air outlet structure 1223, and if the housing 1 does not have the second air inlet structure 1222 and the second air outlet structure 1224, even if the airflow in the second region 1112 enters the second cavity 121 through the first air inlet structure 1221, and then the airflow enters the first region 1111 from the second cavity 121 through the first air outlet structure 1223, since the first air outlet structure 1223 is located... On the negative pressure side 21 of the first fan 2, or in other words, since the first air outlet structure 1223 is located on the side of the first fan 2 near the air inlet structure 112 and the first region 1111, the airflow is likely to flow mainly towards the first air outlet structure 1223 after entering the second cavity 121 through the first air inlet structure 1221. The flow rate of the airflow that can pass through the sub-regions of the second cavity 121 that are far from the air inlet structure 112 and the first region 1111 is relatively small. In other words, the flow rate of the airflow that can pass through the sub-regions of the second cavity 121 that are near the second region 1112 is relatively small. The heat of the power devices located in the sub-regions of the second cavity 121 that are near the second region 1112 is not easily transferred by the airflow to the first cavity 111 and the outside of the housing 1. The power devices located in the sub-regions of the second cavity 121 that are near the second region 1112 are prone to a large temperature rise, which in turn leads to a relatively low reliability of the energy storage converter. Furthermore, if the first air intake structure 1221 is relatively close to the exhaust structure 113, it can also be said that even if the first air intake structure 1221 is relatively far away from the first fan 2 and the first area 1111, since the heating power of some power devices located in the second cavity 121 is not consistent, some power devices have a large heating power and some power devices have a small heating power, it is easy to have the problem that "the airflow of the power device that has absorbed a large heating power will transfer heat to the power device with a small heating power when it passes through the power device with a small heating power, resulting in a relatively large temperature rise of the power device with a small heating power".

[0045] In some embodiments of the energy storage converter 10 in this application, since "the housing 1 includes a first cavity 111 and a second cavity 121, the first fan 2 is located in the first cavity 111, the first cavity 111 includes a first region 1111 and a second region 1112, the first region 1111 is located on the negative pressure side 21 of the first fan 2, the second region 1112 is located on the positive pressure side 22 of the first fan 2, the second cavity 121 includes a third region 1211 and a fourth region 1212, the first region 1111 is connected to the outside of the housing 1 via an air inlet structure 112, the second region 1112 is connected to the outside of the housing 1 via an exhaust structure 113, the second region 1112 and the third region 1211 are connected via a first air inlet structure 1221, and the third region 1211 and the first region 1111 are connected via..." The second region 1112 and the fourth region 1212 are connected via the first air outlet structure 1223, and the fourth region 1212 and the second region 1112 are connected via the second air inlet structure 1222. The fourth region 1212 and the second region 1112 are connected via the second air outlet structure 1224. It can be understood that the heat in different regions of the second cavity 121 can be transferred to the first cavity 111 and the outside of the housing 1 by the corresponding airflow. Moreover, the heat carried by the airflow in the third region 1211 is not likely to directly affect the power devices in the fourth region 1212. Similarly, the heat carried by the airflow in the fourth region 1212 is not likely to directly affect the power devices in the third region 1211. Therefore, some embodiments of the energy storage converter 10 in this application can have the advantage of high heat dissipation efficiency.

[0046] In some embodiments, the negative pressure side 21 mainly refers to the side of the first fan 2 where the air pressure decreases during the process from when the first fan 2 has not started to when it starts. The positive pressure side 22 mainly refers to the side of the first fan 2 where the air pressure increases during the process from when the first fan 2 has not started to when it starts. When the first fan 2 starts, the air pressure in the first region 1111 is lower than the air pressure in the second region 1112.

[0047] In some embodiments, the shape and volume of the first region 1111 within the first cavity 111 may not be specifically defined, nor may the shape and volume of the second region 1112 be specifically defined.

[0048] In some embodiments, within the first cavity 111, the first region 1111 and the second region 1112 can be divided according to the location of the first fan 2. Of course, there may not be a clear boundary between the first region 1111 and the second region 1112, which does not affect the usage requirement that "the air pressure in the first region 1111 is less than the air pressure in the second region 1112 under the condition that the first fan 2 is running".

[0049] In some embodiments, the first region 1111 and the second region 1112 are both three-dimensional regions with corresponding capacities.

[0050] In some embodiments, the shape and volume of the third region 1211 and the fourth region 1212 may not be specifically defined within the second cavity 121.

[0051] In some embodiments, the third region 1211 and the fourth region 1212 may not be connected within the second cavity 121. For example, a partition may be provided within the second cavity 121, separating the third region 1211 and the fourth region 1212.

[0052] In some embodiments, the third region 1211 and the fourth region 1212 can also be connected within the second cavity 121. However, some flow guides can be provided within the second cavity 121, positioned between the third region 1211 and the fourth region 1212. The flow guides may not completely isolate the third region 1211 and the fourth region 1212. Due to the presence of the flow guides and the positive and negative pressure difference generated by the first fan 2, the main part of the airflow entering the third region 1211 through the first air inlet structure 1221 still flows within the third region 1211 and then flows through the first air outlet structure 1223 to the first region 1111. Similarly, the main part of the airflow entering the fourth region 1212 through the second air inlet structure 1222 still flows within the fourth region 1212 and then flows through the second air outlet structure 1224 to the second region 1112. The influence of a small amount of airflow flowing between the third region 1211 and the fourth region 1212 can be ignored.

[0053] In some embodiments, the third region 1211 and the fourth region 1212 are both three-dimensional regions with corresponding capacities.

[0054] In some embodiments, within the second cavity 121, the third region 1211 and the fourth region 1212 can be positioned relative to each other as follows: Figure 2 , Figure 3 or Figure 4 As shown, Figure 2 , Figure 3 and Figure 4 The dotted line in the image is used to represent the boundary between the third region 1211 and the fourth region 1212. Figure 2 , Figure 3 and Figure 4 The dashed line in the diagram is an artificially defined, referential boundary. Of course, the relative positions of the third region 1211 and the fourth region 1212 are not limited to... Figure 2 , Figure 3 or Figure 4 The embodiments shown are not described in detail here.

[0055] In some embodiments, the air inlet structure 112 is a structure that can be used for airflow to enter the first cavity 111 from outside the housing 1.

[0056] In some embodiments, the exhaust structure 113 is a structure that can be used for airflow from inside the first cavity 111 to outside the housing 1.

[0057] In some embodiments, the first air intake structure 1221 is a structure that can be used for airflow to enter the third region 1211.

[0058] In some embodiments, the second air inlet structure 1222 is a structure that can be used for airflow to enter the fourth region 1212.

[0059] In some embodiments, the first air outlet structure 1223 is a structure that can be used for airflow to exit the third region 1211.

[0060] In some embodiments, the second air outlet structure 1224 is a structure that can be used for airflow to exit the fourth region 1212.

[0061] In some embodiments, please refer to Figure 1 As shown, the outer casing 1 can be indirectly connected to the second region 1112 via the air inlet structure 112 and the first region 1111.

[0062] In some embodiments, please refer to Figure 1 As shown, the first region 1111 can be indirectly connected to the third region 1211 via the second region 1112 and the first air intake structure 1221.

[0063] In some embodiments, please refer to Figure 1 As shown, the third region 1211 can be indirectly connected to the second region 1112 via the first air outlet structure 1223 and the first region 1111.

[0064] In some embodiments, please refer to Figure 1 As shown, the first region 1111 can be indirectly connected to the fourth region 1212 via the second region 1112 and the second air intake structure 1222.

[0065] In some embodiments, please refer to Figure 1 As shown, the fourth region 1212 can be indirectly connected to the outside of the housing 1 via the second air outlet structure 1224 and the second region 1112.

[0066] In some embodiments, please refer to Figure 1 As shown, the second cavity 121 is indirectly connected to the outside of the box 1 through the first cavity 111.

[0067] In some embodiments, please refer to Figure 1As shown, the housing 1 may include a partition 122, which separates the first cavity 111 and the second cavity 121. The partition 122 is provided with a first air inlet structure 1221, a second air inlet structure 1222, a first air outlet structure 1223, and a second air outlet structure 1224. Please refer to... Figure 5 , Figure 6 , Figure 7 or Figure 8 As shown, in a first direction (e.g., the front-to-back direction or direction X) of the energy storage converter 10, a first air outlet structure 1223 and a second air outlet structure 1224 are spaced apart, and a first air inlet structure 1221 and a second air inlet structure 1222 are located between the first air outlet structure 1223 and the second air outlet structure 1224. In this configuration, the flow direction of the airflow in the third region 1211 is approximately opposite to the flow direction of the airflow in the fourth region 1212. Figure 1 Taking the structure shown as an example, the airflow direction in the third region 1211 is forward, and the airflow direction in the fourth region 1212 is backward. Any region within the second cavity 121 can be sufficiently traversed by the corresponding airflow, resulting in a relatively high rate of heat transfer from the second cavity 121 to the first cavity 111. The heat transferred from the second cavity 121 to the first cavity 111 can then be transferred back to the outside of the housing 1. Therefore, some embodiments of the energy storage converter 10 in this application can have the advantage of high heat dissipation efficiency.

[0068] In some embodiments, the separator 122 may be a plate-like structure or a sheet-like structure.

[0069] In some embodiments, the separator 122 may be provided with some perforated structures (not shown in the figure), which are used for components such as power devices, heat sinks or fasteners to pass through. When the first fan 2 is started, the airflow may pass through the gap between these perforated structures and the components to be passed through. However, the flow cross-sectional area of ​​the gap is relatively small, and the effect of the airflow through these gaps on heat dissipation can be disregarded.

[0070] In some embodiments, please refer to Figure 5 As shown, in the first direction, the first air intake structure 1221 is closer to the first air outlet structure 1223 than the second air intake structure 1222. In other words, the second air intake structure 1222 is closer to the second air outlet structure 1224 than the first air intake structure 1221.

[0071] In some embodiments, please refer to Figure 6As shown, in the first direction, the first air intake structure 1221 is closer to the second air outlet structure 1224 than the second air intake structure 1222. In other words, the second air intake structure 1222 is closer to the first air outlet structure 1223 than the first air intake structure 1221.

[0072] In some embodiments, please refer to Figure 7 or Figure 8 As shown, in the first direction, the distance between the first air intake structure 1221 and the first air outlet structure 1223 is approximately the same as the distance between the second air intake structure 1222 and the first air outlet structure 1223. For example, the distance between the first air intake structure 1221 and the first air outlet structure 1223 is greater than the distance between the second air intake structure 1222 and the first air outlet structure 1223, or the distance between the first air intake structure 1221 and the first air outlet structure 1223 is less than the distance between the second air intake structure 1222 and the first air outlet structure 1223. The difference between the two distances is relatively small, for example, the difference does not exceed 5 millimeters (mm). Similarly, in the first direction, the distance between the first air intake structure 1221 and the second air outlet structure 1224 can also be approximately the same as the distance between the second air intake structure 1222 and the second air outlet structure 1224.

[0073] In some embodiments, please refer to Figure 5 , Figure 6 , Figure 7 or Figure 8 As shown, in the first direction, the distance between the first air inlet structure 1221 and the first air outlet structure 1223 is less than the distance between the first air inlet structure 1221 and the second air outlet structure 1224, and the distance between the second air inlet structure 1222 and the first air outlet structure 1223 is less than the distance between the second air inlet structure 1222 and the second air outlet structure 1224.

[0074] In some embodiments, please refer to Figure 5 , Figure 6 , Figure 7 or Figure 8As shown, the partition 122 may be provided with a fan mounting area 1225. In a first direction, the fan mounting area 1225 may be located between the first air outlet structure 1223 and the first air inlet structure 1221, or it may be located between the first air outlet structure 1223 and the second air inlet structure 1222. The second air outlet structure 1224 is located on the side of the first air inlet structure 1221 and the second air inlet structure 1222 that is away from the fan mounting area 1225. The first fan 2 may be placed in the fan mounting area 1225. It can be understood that the fan mounting area 1225 is an area artificially divided on the partition 122 for placing the first fan 2. Furthermore, the first fan 2 may be connected to the partition 122, or it may not be connected to the partition 122.

[0075] In some embodiments, Figure 5 , Figure 6 , Figure 7 and Figure 8 The dashed line range shown can represent the range of fan setting area 1225.

[0076] In some embodiments, the fan mounting area 1225 can be used to place the first fan 2, and the fan mounting area 1225 can also be used to place the fan bracket (not shown in the figure). The first fan 2 can be mounted on the partition 122 by the fan bracket.

[0077] In some embodiments, please refer to Figure 5 , Figure 6 or Figure 7 As shown, the entire first air intake structure 1221 can be kept outside the fan setting area 1225.

[0078] In some other embodiments (not shown in the figures), a portion of the first air intake structure may fall within the fan mounting area, wherein the first air intake structure and the first fan may be arranged to avoid each other in the vertical or height direction. With this arrangement, the energy storage converter 10 has a relatively high degree of structural compactness.

[0079] In some embodiments, please refer to Figure 5 , Figure 6 or Figure 7 As shown, the second air intake structure 1222 can be completely separated from the fan mounting area 1225.

[0080] In some other embodiments (not shown in the figures), a portion of the second air intake structure may fall within the fan mounting area, wherein the second air intake structure and the first fan may be arranged to avoid each other in the vertical or height direction. With this arrangement, the energy storage converter 10 has a relatively high degree of structural compactness.

[0081] In some embodiments, please refer to Figure 5 , Figure 6 or Figure 7 As shown, the entire first air outlet structure 1223 can be kept outside the fan setting area 1225.

[0082] In some other embodiments, please refer to Figure 8 As shown, a portion of the first air outlet structure 1223 can fall within the fan mounting area 1225. The first air outlet structure 1223 and the first fan 2 can be arranged to avoid each other in the vertical or height direction. With this arrangement, the energy storage converter 10 has a relatively high degree of structural compactness.

[0083] In some embodiments, please refer to Figure 9 As shown, the energy storage converter 10 may include at least two first fans 2, which are distributed along a second direction (e.g., left-right or direction Y) of the energy storage converter 10. In this second direction, a first air outlet structure 1223 is located between a first air inlet structure 1221 and a second air inlet structure 1222. On the one hand, the load generated by the airflow through the first air outlet structure 1223, the airflow through the first air inlet structure 1221, and the airflow through the second air inlet structure 1222 can be shared by different first fans 2, so that the difference in load between each first fan 2 is relatively small, thereby reducing the total noise of all first fans 2. On the other hand, the airflow entering the first region 1111 from the third region 1211 via the first air outlet structure 1223 and the heat it carries can be rapidly diffused on both sides arranged opposite each other in the second direction, so as to reduce the amount of heat that originally flowed out of the third region 1211 and flowed back into the third region 1211. It can also be understood that the temperature of the airflow entering the third region 1211 via the first air inlet structure 1221 is lower than the temperature of the airflow flowing out of the third region 1211 via the first air outlet structure 1223, thus making the heat dissipation efficiency of the power devices located in the third region 1211 relatively large.

[0084] In some embodiments, the first direction and the second direction may be perpendicular.

[0085] In some other embodiments (not shown in the figures), the first direction and the second direction may intersect but not be perpendicular.

[0086] In some embodiments, the statement "in the second direction, the first air outlet structure 1223 is located between the first air inlet structure 1221 and the second air inlet structure 1222" can be understood as "in the second direction, the entire first air outlet structure 1223 can be located between the first air inlet structure 1221 and the second air inlet structure 1222," or it can be understood as "in the second direction, a portion of the first air outlet structure 1223 can be located between the first air inlet structure 1221 and the second air inlet structure 1222." The following content will primarily use the example of "in the second direction, the entire first air outlet structure 1223 is located between the first air inlet structure 1221 and the second air inlet structure 1222" to describe the situation.

[0087] In some embodiments, the energy storage converter 10 may include three, four, five or more first fans 2, which are distributed along a second direction of the energy storage converter 10.

[0088] In some embodiments, please refer to Figure 9 As shown, in the second direction, a distance D1 may exist between the first air outlet structure 1223 and the first air inlet structure 1221, and a distance D2 may exist between the first air outlet structure 1223 and the second air inlet structure 1222. The distance D2 may be less than the distance D1. Under this configuration, the airflow entering the first region 1211 from the third region 1211 via the first air outlet structure 1223 and the heat it carries are less likely to enter the third region 1211 again via the first air inlet structure 1221, thereby making the heat dissipation efficiency of the power devices located in the third region 1211 relatively large.

[0089] In some embodiments, please refer to Figure 9 As shown, distance D2 can be less than distance D1, and the ratio between distance D2 and distance D1 can be in the range of 0.1 to 0.8. Specifically, the ratio between distance D2 and distance D1 can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, or 0.8.

[0090] In some other embodiments, distance D2 may be less than distance D1, and the ratio between distance D2 and distance D1 may be in the range of 0.1 to 0.4. Specifically, the ratio between distance D2 and distance D1 may be 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, or 0.4.

[0091] In some other embodiments, distance D2 may be less than distance D1, and the ratio between distance D2 and distance D1 may be in the range of 0.5 to 0.8. Specifically, the ratio between distance D2 and distance D1 may be 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, or 0.8.

[0092] In some other embodiments, distance D2 may be less than distance D1, and the ratio between distance D2 and distance D1 may be in the range of 0.3 to 0.6. Specifically, the ratio between distance D2 and distance D1 may be 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, or 0.6.

[0093] In some embodiments, if the total heat generation power of some power devices located in the third region 1211 is less than the total heat generation power of some power devices located in the fourth region 1212, then correspondingly, the heat carried by the airflow entering the first region 1111 from the third region 1211 via the first air outlet structure 1223 is relatively less than the heat carried by the airflow entering the second region 1112 from the fourth region 1212 via the second air outlet structure 1224. It is understood that if the temperature of the airflow entering the first region 1111 from the third region 1211 via the first air outlet structure 1223 is lower than the temperature of the fourth region 1212, and the temperature difference is too large, the airflow entering the first region 1111 from the third region 1211 via the first air outlet structure 1223 still has a large capacity for absorbing heat; that is, the airflow entering the first region 1111 from the third region 1211 via the first air outlet structure 1223 can be reused. With the setting that "the distance between the first air outlet structure 1223 and the first air inlet structure 1221 in the second direction is greater than the distance between the first air outlet structure 1223 and the second air inlet structure 1222 in the second direction", some of the airflow entering the first region 1111 from the third region 1211 via the first air outlet structure 1223 easily enters the fourth region 1212 via the second air inlet structure 1222, so that the airflow continues to absorb heat from some power devices with relatively high heat generation power in the fourth region 1212. Therefore, the utilization rate of the airflow entering the housing 1 is relatively high, and the energy consumption of the first fan 2 is relatively low under the condition of meeting heat dissipation requirements.

[0094] In some embodiments, if the total heat generation power of some power devices located in the fourth region 1212 is greater than the total heat generation power of some power devices located in the third region 1211, the flow cross-sectional area of ​​the second air inlet structure 1222 can be greater than the flow cross-sectional area of ​​the first air inlet structure 1221. Under this configuration, on the one hand, a larger flow rate of air can be provided from the second region 1112 to the fourth region 1212 to meet the heat dissipation requirements of the power devices in the fourth region 1212; on the other hand, some portions of the airflow entering the first region 1111 from the third region 1211 via the first air outlet structure 1223 can easily enter the fourth region 1212 via the second air inlet structure 1222, allowing the airflow to continue absorbing heat from some power devices with relatively high heat generation power in the fourth region 1212. Therefore, the utilization rate of the airflow entering the housing 1 is relatively high, and under the condition of meeting heat dissipation requirements, the energy consumption of the first fan 2 is relatively low.

[0095] The flow cross-sectional area mainly refers to the effective cross-sectional area perpendicular to the airflow direction of the structure through which the airflow passes. Furthermore, the flow path can be the space enclosed by a perforated structure or the space enclosed by a tubular structure.

[0096] In some embodiments, the flow cross-sectional area of ​​the second air inlet structure 1222 can be area S2, and the flow cross-sectional area of ​​the first air inlet structure 1221 can be area S1. The ratio of area S2 to area S1 can be in the range of 1.1 to 2. Specifically, the ratio of area S2 to area S1 can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, or 2.

[0097] In some other embodiments, the flow cross-sectional area of ​​the second air inlet structure 1222 can be area S2, and the flow cross-sectional area of ​​the first air inlet structure 1221 can be area S1. The ratio of area S2 to area S1 can also be in the range of 1.1 to 1.5. Specifically, the ratio of area S2 to area S1 can be 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, or 1.5.

[0098] In some other embodiments, the flow cross-sectional area of ​​the second air inlet structure 1222 can be area S2, and the flow cross-sectional area of ​​the first air inlet structure 1221 can be area S1. The ratio of area S2 to area S1 can also be in the range of 1.5 to 2. Specifically, the ratio of area S2 to area S1 can be 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, or 2.

[0099] In some other embodiments, the flow cross-sectional area of ​​the second air inlet structure 1222 can be area S2, and the flow cross-sectional area of ​​the first air inlet structure 1221 can be area S1. The ratio of area S2 to area S1 can also be in the range of 1.3 to 1.7. Specifically, the ratio of area S2 to area S1 can be 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, 1.6, 1.65, or 1.7.

[0100] In some other embodiments, the flow cross-sectional area of ​​the first air inlet structure 1221 may be the same as that of the second air inlet structure 1222.

[0101] In some embodiments, please refer to Figure 1 As shown, the second air outlet structure 1224 can be located at one end of the partition 122 near the exhaust structure 113. Please refer to [reference needed]. Figures 5-10 As shown, the second air outlet structure 1224 can be distributed along the second direction, and the first direction intersects with the second direction. Under this arrangement, the airflow carrying more heat that flows from the fourth region 1212 into the second region 1112 through the second air outlet structure 1224 can quickly flow to the outside of the housing 1 through the exhaust structure 113.

[0102] In some embodiments, please refer to Figure 10 As shown, the separator 122 may further include a finned area 1226 and an inductor area 1227. In the first direction, the finned area 1226 and the inductor area 1227 are located between the first air intake structure 1221 and the second air outlet structure 1224, and the finned area 1226 and the inductor area 1227 are located between the second air intake structure 1222 and the second air outlet structure 1224. Since the airflow drawn from the first region 1111 to the second region 1112 by the first fan 2 is relatively low in temperature, a portion of this relatively low-temperature airflow can enter the third region 1211 through the first air intake structure 1221, and another portion of this relatively low-temperature airflow can enter the fourth region 1212 through the second air intake structure 1222. Yet another portion of this relatively low-temperature airflow can sequentially absorb heat from the heat dissipation fins (not shown in the figure) in the finned area 1226 and the inductor (not shown in the figure) in the inductor area 1227 in the second region 1112. The airflow entering the third region 1211 through the first air intake structure 1221 and the airflow entering the fourth region 1212 through the second air intake structure 1222 are not easily affected by the heat from the heat dissipation fins in the fin setting area 1226 and the heat from the inductor in the inductor setting area 1227, so that the heat dissipation efficiency of the power devices in the third region 1211 and the heat dissipation efficiency of the power devices in the fourth region 1212 are both large.

[0103] In some embodiments, Figure 10 The two dashed lines shown can represent the range of fin setting area 1226 and the range of inductor setting area 1227, respectively.

[0104] In some embodiments, the fin placement area 1226 is an area on the separator 122 that is artificially divided for placing heat dissipation fins.

[0105] In some embodiments, the separator 122 may have a first perforated structure (not shown) provided in the fin setting area 1226, and the heat dissipation fins may extend from the fourth region 1212 through the first perforated structure to the second region 1112. The heat dissipation fins are used to conduct the heat of the insulated-gate bipolar transistor (IGBT) located in the fourth region 1212 to the airflow located in the second region 1112.

[0106] In some embodiments, the inductor placement area 1227 is an area on the separator 122 that is artificially divided for placing an inductor.

[0107] In some embodiments, the inductor located in the inductor setting area 1227 may be an inverter inductor or an AC-side output filter inductor.

[0108] In some embodiments, the separator 122 may have a second hollow structure (not shown) disposed in the inductor setting area 1227, the inductor can extend from the fourth region 1212 through the second hollow structure to the second region 1112, the main part of the inductor structure is located in the second region 1112, and the heat generated by the inductor can be absorbed by the airflow located in the second region 1112.

[0109] In some embodiments, please refer to Figure 11 As shown, the first air inlet structure 1221 may include a plurality of through holes arranged in an array on the separator 122.

[0110] In some embodiments, please refer to Figure 11 As shown, the second air inlet structure 1222 may include a plurality of through holes arranged in an array on the separator 122.

[0111] In some embodiments, please refer to Figure 11 As shown, the first air outlet structure 1223 may include a plurality of through holes arranged in an array on the separator 122.

[0112] In some embodiments, please refer to Figure 11 As shown, the second air outlet structure 1224 may include a plurality of through holes arranged in an array on the separator 122.

[0113] In some embodiments, please refer to Figure 11As shown, the first air inlet structure 1221, the second air inlet structure 1222, the first air outlet structure 1223, and the second air outlet structure 1224 may each include a plurality of through holes arrayed on the separator 122.

[0114] In some other embodiments (not shown in the figures), at least one of the first air inlet structure, the second air inlet structure, the first air outlet structure, and the second air outlet structure may be a pipe structure or other structure that has the function of guiding airflow on the partition.

[0115] In some embodiments, please refer to Figure 11 As shown, in the first direction, the heat dissipation fins 3 and inductors 4 extending from the fourth region 1212 to the second region 1112 can be located between the first air intake structure 1221 and the second air outlet structure 1224, and the heat dissipation fins 3 and inductors 4 extending into the first cavity 111 can be located between the second air intake structure 1222 and the second air outlet structure 1224.

[0116] In some embodiments, please refer to Figure 11 As shown, the energy storage converter 10 may include a fan bracket 2a, on which a plurality of first fans 2 are mounted. The fan bracket 2a may be located within a first cavity 111. Furthermore, the fan bracket 2a is located between a first region 1111 and a second region 1112. Moreover, the fan bracket 2a may or may not be connected to the separator 122.

[0117] In some embodiments, regarding the condition that "the total heat generation power of some power devices located in the fourth region 1212 is greater than the total heat generation power of some power devices located in the third region 1211", please refer to Figure 12As shown, the energy storage converter 10 may further include a second fan 5 and a third fan 6. The second fan 5 is located in the third region 1211, and the third fan 6 is located in the fourth region 1212. The number of third fans 6 is greater than the number of second fans 5. For the airflow in the second region 1212, the flow rate of the airflow entering the fourth region 1212 from the second region 1212 is greater than the flow rate of the airflow entering the third region 1211 from the second region 1212. On the one hand, this can satisfy the heat dissipation requirements of some power devices located in the third region 1211 and some power devices located in the fourth region 1212, respectively. On the other hand, the main part of the heat carried by the airflow flowing from the third region 1211 into the first region 1111 through the first air outlet structure 1223 is not likely to re-enter the third region 1211. The main part of the heat carried by the airflow flowing from the third region 1211 into the first region 1111 through the first air outlet structure 1223 will flow to the second region 1112 and the fourth region 1212, and then flow to the outside of the housing 1 through the exhaust structure 113, so that the heat dissipation efficiency of the power devices located in the third region 1211 is relatively large.

[0118] In some embodiments, the second fan 5 can draw the airflow that enters the third region 1211 through the first air intake structure 1221 to the vicinity of some power devices (e.g., DC-side inductors) with relatively large heat generation power located in the third region 1211, and push the airflow in the third region 1211 to flow from the second fan 5 to the first air outlet structure 1223 in the direction F7.

[0119] In some embodiments, the third fan 6 can draw the airflow that enters the fourth region 1212 through the second air intake structure 1222 to the vicinity of some power devices with relatively large heat generation power located in the fourth region 1212, and push the airflow in the fourth region 1212 to flow towards the second air outlet structure 1224.

[0120] In some embodiments, the number of second fans 5 located in the third region 1211 may be one, two, three or more.

[0121] In some embodiments, the number of third fans 6 located in the fourth region 1212 may be two, three, four or more.

[0122] In some embodiments, when the volume of the fourth region 1212 is greater than the volume of the third region 1211, the third fan 6 located in the fourth region 1212 may include a first guide fan 61, a second guide fan 62, and a third guide fan 63. The first guide fan 61, the second guide fan 62, and the third guide fan 63 are located at different positions and have different airflow directions. Therefore, the fourth region 1212 can be sufficiently traversed by airflow to meet the heat dissipation requirements of the power devices located in the fourth region 1212. The first guide fan 61 may be located near the second air inlet structure 1222. The first guide fan 61 can draw the airflow entering the fourth region 1212 through the second air inlet structure 1222 along directions F8 and F9 to a sub-region of the fourth region 1212 near the second air outlet structure 1224. The second guide fan 62 and the third guide fan 63 can be distributed in a second direction (e.g., left-right direction and direction Y) of the energy storage converter 10. The second guide fan 62 and the third guide fan 63 are used to guide the airflow in their respective vicinity, wherein the second guide fan 62 drives the airflow along direction F. 10 The third guide fan 63 drives the airflow along direction F. 11 These airflows then flow from the fourth region 1212 through the second air outlet structure 1224 to the second region 1112.

[0123] In some embodiments, the pumping direction of the second guide fan 62 and the pumping direction of the third guide fan 63 may be the same or different.

[0124] In some embodiments, the second airflow fan 62 and the third airflow fan 63 are closer to the second airflow structure 1224 than the first airflow fan 61.

[0125] In some other embodiments, the second fan 5 mentioned above may not be provided in the third region 1211, and the third fan 6 mentioned above may not be provided in the fourth region 1212, that is, the first fan 2 mentioned above is provided at least in the first cavity 111.

[0126] In some other embodiments, the second fan 5 mentioned above may not be provided in the third region 1211, the third fan 6 mentioned above may be provided in the fourth region 1212, and the first fan 2 mentioned above may be provided in the first cavity 111.

[0127] In some other embodiments, the second fan 5 mentioned above may be provided in the third region 1211, the third fan 6 mentioned above may not be provided in the fourth region 1212, and the first fan 2 mentioned above may be provided in the first cavity 111.

[0128] In some embodiments, please refer to Figure 12 As shown, when the volume of the fourth region 1212 is greater than the volume of the third region 1211, and when the number of power devices accommodated in the fourth region 1212 is greater than the number of power devices accommodated in the third region 1211, the second region 1112 and the fourth region 1212 can also be connected via the first air inlet structure 1221. In this configuration, a portion of the airflow entering the second cavity 121 via the first air inlet structure 1221 can enter the third region 121, and another portion of the airflow entering the second cavity 121 via the first air inlet structure 1221 can flow along direction F. 12 Entering the fourth region 1212. The first air intake structure 1221 and the second air intake structure 1222 can be spaced apart in the second direction relative to the fourth region 1212, so that there are corresponding airflows on both sides of the fourth region 1212 spaced apart in the second direction to participate in heat dissipation, so that the heat dissipation efficiency of the power devices located in the fourth region 1212 is relatively large.

[0129] In some embodiments, please refer to Figure 12 As shown, under the condition that "a portion of the airflow entering the second cavity 121 through the first air intake structure 1221 can enter the third region 1211, and another portion of the airflow entering the second cavity 121 through the first air intake structure 1221 can enter the fourth region 1212", the suction force generated by the second fan 5 located in the third region 1211 can ensure that the flow rate of the airflow flowing into the third region 1211 through the first air intake structure 1221 is greater than the flow rate of the airflow flowing into the fourth region 1212 through the first air intake structure 1221. It can be understood that the main part of the airflow entering the second cavity 121 through the first air intake structure 1221 mainly participates in the heat dissipation of the power devices located in the third region 1211, and a small portion of the airflow entering the second cavity 121 through the first air intake structure 1221 assists in the heat dissipation of the power devices located in the fourth region 1212.

[0130] In some embodiments, please refer to Figure 12 As shown, the energy storage converter 10 may include a guide plate 7, which is disposed in the second cavity 121 and connected to the housing 1. The guide plate 7 is located between the third region 1211 and the fourth region 1212. Under this configuration, the main part of the airflow entering the third region 1211 through the first air inlet structure 1221 dissipates heat on the power devices located in the third region 1211 and flows to the first air outlet structure 1223. The main part of the airflow entering the fourth region 1212 through the second air inlet structure 1222 dissipates heat on the power devices located in the fourth region 1212 and flows to the second air outlet structure 1224.

[0131] In some embodiments, please refer to Figure 12As shown, the guide plate 7 can not completely separate the third region 1211 and the fourth region 1212. Due to the suction force of the second fan 5 located in the third region 1211 and the suction force of the third fan 6 located in the fourth region 1212, the main part of the airflow entering the third region 1211 through the first air inlet structure 1221 dissipates heat on the power devices located in the third region 1211 and flows to the first air outlet structure 1223. The main part of the airflow entering the fourth region 1212 through the second air inlet structure 1222 dissipates heat on the power devices located in the fourth region 1212 and flows to the second air outlet structure 1224.

[0132] In some embodiments, please refer to Figure 12 As shown, the deflector 7 may include at least a first deflector 71 and a second deflector 72, and the extending directions of the first deflector 71 and the second deflector 72 may intersect.

[0133] In some embodiments, the first guide plate 71 and the second guide plate 72 may be connected or not connected.

[0134] In some embodiments, at least one of the first guide plate 71 and the second guide plate 72 may be a plate structure simply connected to the housing 1, or at least one of the first guide plate 71 and the second guide plate 72 may be a substructure of a bracket for mounting power devices.

[0135] In some embodiments, please refer to Figure 12 As shown, even if the deflector 7 does not completely isolate the third region 1211 and the fourth region 1212, some power devices of the energy storage converter 10 can be set at the boundary between the third region 1211 and the fourth region 1212 so that these power devices located at the boundary can also play a similar role as the deflector 7 in guiding airflow.

[0136] In some embodiments, Figure 12 The two dashed-dot lines shown can represent the ranges of the third region 1211 and the fourth region 1212, respectively.

[0137] In some other embodiments, please refer to Figure 13 As shown, the deflector plate 7 can also isolate the third region 1211 and the fourth region 1212. It can be understood that the isolation mentioned here is an airflow isolation implemented without affecting the electrical connection between the power device located in the third region 1211 and the power device located in the fourth region 1212, that is, the deflector plate 7 can be provided with through holes for conductive structures to pass through.

[0138] In some embodiments, the housing 1 of the energy storage converter 10 can be as follows: Figures 14-15As shown, the housing 1 may include a first housing 11, a second housing 12 and a cover 13, wherein the first housing 11 and the second housing 12 are detachably connected, and the second housing 12 and the cover 13 are detachably connected.

[0139] In some embodiments, a detachable connection mainly refers to the connection between two components to be connected by fasteners such as screws, bolts, or pins.

[0140] In some embodiments, please refer to Figures 16-17 As shown, the first housing 11 may have the first cavity 111, air inlet structure 112 and air outlet structure 113 mentioned above, and the second housing 12 may have the second cavity 121 and partition 122 mentioned above.

[0141] In some embodiments, please refer to Figures 16-17 As shown, the first housing 11 may have a first opening 115 communicating with the first cavity 111, and the second housing 12 may have a second opening 124 communicating with the second cavity 121. When the first housing 11 and the second housing 12 are connected, a partition 122 of the second housing 12 is disposed at the first opening 115 to separate the first cavity 111 and the second cavity 121. The partition 122 can be understood as the bottom plate of the second housing 12. When the second housing 12 and the cover 13 are connected, the cover 13 is disposed at the second opening 124.

[0142] In some embodiments, both the first housing 11 and the second housing 12 can be understood as a box structure with an opening at the top.

[0143] In some embodiments, please refer to Figures 14-17 As shown, the air inlet structure 112 may include a plurality of hole structures arranged in an array on the first housing 11.

[0144] In some embodiments, please refer to Figures 14-17 As shown, the exhaust structure 113 may include a plurality of holes arranged in an array on the first housing 11.

[0145] In some embodiments, please refer to Figures 14-17 As shown, the first housing 11 may have a first sidewall 114 and a second sidewall 114a, which are arranged opposite to each other along a first direction. The first sidewall 114 may be provided with an air inlet structure 112, and the second sidewall 114a may be provided with an exhaust structure 113. Alternatively, it can be understood that one side of the two opposite sides of the first cavity 111 along the first direction may be provided with an air inlet structure 112, and the other side may be provided with an exhaust structure 113.

[0146] In some embodiments, the air inlet structure 112 may be a grid structure, a pipe structure, or a perforated structure.

[0147] In some embodiments, the exhaust structure 113 may be a grid structure, a pipe structure, or a perforated structure.

[0148] In some embodiments, please refer to Figures 16-17 As shown, the fan bracket 2a located in the first cavity 111 is detachably connected to the first housing 11, and the fan bracket 2a located in the first cavity 111 is also detachably connected to the partition 122 of the second housing 12.

[0149] In some embodiments, the second housing 12 may not have a communication structure for airflow that allows the second cavity 121 to be directly connected to the outside of the housing 1. The second cavity 121 is indirectly connected to the outside of the housing 1 mainly through the first cavity 111. The third sidewall 123 of the second housing 12 may have some mounting holes (not shown in the figure) for plug-in terminals (not shown in the figure) to pass through, so that some power devices in the second cavity 121 can be electrically connected to cables or signal lines located outside the energy storage converter 10 through plug-in terminals.

[0150] In some embodiments, electrical connection may include: the electrical unit and its connection structure may include conductive material, the electrical unit is connected to other electrical units through its connection structure, and the electrical unit and its connection structure may be conductive or energized when in a power generation, power supply or energized state.

[0151] In some embodiments, the power devices of the energy storage converter may include insulated gate bipolar transistors, inductors, capacitors, resistors, relays, reactors, printed circuit boards, and other devices.

[0152] Secondly, this application provides some embodiments of an energy storage system, which may include an energy storage converter and multiple battery devices. The energy storage converter may employ the embodiment of the energy storage converter 10 described above in the first aspect of this application. The battery devices can be electrically connected to a power grid or electrical equipment outside the energy storage system via the energy storage converter. The energy storage converter can convert alternating current (AC) to direct current (DC), and the battery devices can store the DC electrical energy. The battery devices can output DC power, and the energy storage converter can convert the DC power into AC power required by the power grid or AC power required by the electrical equipment.

[0153] In some embodiments, the energy storage system may further include a battery management system (BMS), which can collect operating status information of multiple battery devices and control the operation of multiple battery devices.

[0154] Thirdly, this application provides some embodiments of electrical equipment, which may include the embodiments of the energy storage converter 10 provided in the first aspect of this application as described above.

[0155] In some embodiments, the electrical equipment may be a vehicle, aircraft, ship, household appliance, or industrial appliance, or other equipment or device that requires electrical energy.

[0156] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage converter, characterized by, The energy storage converter includes a housing, a first fan, a second fan, a third fan, and a baffle plate; The housing includes a first cavity and a second cavity. The first fan is located in the first cavity. The first cavity includes a first region and a second region. The first region is located on the negative pressure side of the first fan, and the second region is located on the positive pressure side of the first fan. The second cavity includes a third region and a fourth region. The second fan is located in the third region, and the third fan is located in the fourth region. The enclosure includes an air inlet structure, an air outlet structure, a first air inlet structure, a second air inlet structure, a first air outlet structure, and a second air outlet structure. The first area is connected to the outside of the enclosure via the air inlet structure. The second area is connected to the outside of the enclosure via the air outlet structure. The second area is connected to the third area via the first air inlet structure. The third area is connected to the first area via the first air outlet structure. The second area is connected to the fourth area via the second air inlet structure. The fourth area is connected to the second area via the second air outlet structure. The guide plate is located within the second cavity and between the third region and the fourth region, and the guide plate does not completely separate the third region and the fourth region; In the first direction of the energy storage converter, the first air outlet structure and the second air outlet structure are arranged at intervals, and the first air inlet structure and the second air inlet structure are located between the first air outlet structure and the second air outlet structure. In the second direction of the energy storage converter, there is a distance D1 between the first air outlet structure and the first air inlet structure, and a distance D2 between the first air outlet structure and the second air inlet structure. The distance D2 is less than the distance D1, and the first direction intersects the second direction.

2. The energy storage converter of claim 1, wherein, The housing includes a partition, which separates the first cavity and the second cavity. The partition is provided with a first air inlet structure, a second air inlet structure, a first air outlet structure, and a second air outlet structure.

3. The energy storage converter according to claim 2, characterized in that, The separator is provided with a fan mounting area, in which the first fan is placed. In the first direction, the fan mounting area is located between the first air outlet structure and the first air inlet structure. The fan mounting area is also located between the first air outlet structure and the second air inlet structure. The second air outlet structure is located on the side of the first air inlet structure and the second air inlet structure away from the fan mounting area.

4. The energy storage converter according to claim 3, characterized in that, The energy storage converter includes at least two first fans, which are distributed along the second direction, and in the second direction, the first air outlet structure is located between the first air inlet structure and the second air inlet structure.

5. The energy storage converter according to claim 4, characterized in that, The flow cross-sectional area of ​​the second air intake structure is larger than that of the first air intake structure.

6. The energy storage converter according to claim 2, characterized in that, The second air outlet structure is disposed at one end of the separator near the exhaust structure, and the second air outlet structure is distributed along the second direction, the first direction intersecting the second direction.

7. The energy storage converter according to claim 2, characterized in that, The separator is further provided with a fin setting area and an inductor setting area. In the first direction, the fin setting area and the inductor setting area are located between the first air inlet structure and the second air outlet structure. The fin setting area and the inductor setting area are also located between the second air inlet structure and the second air outlet structure.

8. The energy storage converter according to claim 2, characterized in that, At least one of the first air inlet structure, the second air inlet structure, the first air outlet structure, and the second air outlet structure includes a plurality of through holes arranged in an array on the separator.

9. The energy storage converter according to any one of claims 1 to 8, characterized in that, The number of the third fan is greater than the number of the second fan.

10. The energy storage converter according to any one of claims 1 to 8, characterized in that, The volume of the fourth region is greater than that of the third region, and the number of power devices contained in the fourth region is greater than that contained in the third region. The second region and the fourth region are also connected via the first air intake structure. The first air intake structure and the second air intake structure are spaced apart from the fourth region.

11. The energy storage converter according to any one of claims 1 to 8, characterized in that, The guide plate is connected to the housing.

12. An energy storage system, characterized in that, The energy storage system includes an energy storage converter and a battery device, the energy storage converter and the battery device are electrically connected, and the energy storage converter is the energy storage converter according to any one of claims 1 to 11.

13. An electrical appliance, characterized in that, The electrical equipment includes the energy storage converter according to any one of claims 1 to 11.

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