Energy storage converter and energy storage system

Abstract

The invention relates to an energy storage converter and an energy storage system, and relates to the technical field of energy storage. The energy storage converter comprises a box body and a first airflow generating device, the box body comprises a first cavity and a second cavity, the first cavity is communicated with the outside of the box body, at least part of the structure of the first airflow generating device is arranged in the first cavity, and the first airflow generating device is used for enabling airflow to flow into the second cavity from the first cavity. The first airflow generating device is also used for enabling airflow to flow into the first cavity from the second cavity, the second cavity is not directly communicated with the outside of the box body, and the second cavity is indirectly communicated with the outside of the box body through the first cavity. Therefore, a small number of electrical parts with relatively low importance levels can be arranged in the first cavity, and a large number of electrical parts with relatively high importance levels can be arranged in the second cavity. Therefore, most electrical parts with relatively high importance levels in the energy storage converter are not easy to be contacted and damaged by foreign matters outside the box body, and the protection level of the energy storage converter is relatively high.

Description

Technical Field

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

[0002] In related technologies, power conversion systems (PCS) are devices within energy storage systems that perform bidirectional energy conversion, system control, and grid interaction. However, the protection level of power conversion systems in these technologies needs improvement. Summary of the Invention

[0003] In a first aspect, this application provides an energy storage converter, which includes a housing and a first airflow generating device. The housing includes a first cavity and a second cavity. The first cavity is connected to the outside of the housing. At least a portion of the structure of the first airflow generating device is disposed in the first cavity. The first airflow generating device is used to make airflow flow from the first cavity to the second cavity, and the first airflow generating device is also used to make airflow flow from the second cavity to the first cavity.

[0004] Optionally, the first airflow generating device is disposed in the first cavity, and the housing includes an air inlet structure and an air outlet structure. The first cavity is connected to the second cavity through the air inlet structure, and the second cavity is connected to the first cavity through the air outlet structure. The air inlet structure is disposed on the positive pressure side of the first airflow generating device, and the air outlet structure is disposed on the negative pressure side of the first airflow generating device.

[0005] Optionally, the housing includes a partition plate, which separates the first chamber and the second chamber; the air intake structure includes an air intake hole penetrating through the partition plate, and / or the air exhaust structure includes an air exhaust hole penetrating through the partition plate.

[0006] Optionally, the total flow area of ​​the air inlet is smaller than the total flow area of ​​the air outlet.

[0007] Optionally, the housing also includes a baffle plate disposed in the second cavity, separating the air inlet and outlet.

[0008] Optionally, the housing includes a partition, which is disposed in the first cavity. The first cavity is divided into a positive pressure cavity and a negative pressure cavity by the partition. The positive pressure cavity is connected to the second cavity through an air inlet structure, and the second cavity is connected to the negative pressure cavity through an air outlet structure. The partition is provided with a flow structure, and the negative pressure cavity is connected to the positive pressure cavity through the flow structure. The first airflow generating device is used to make the airflow flow from the negative pressure cavity to the positive pressure cavity through the flow structure.

[0009] Optionally, the flow structure includes a connecting hole penetrating through the separator, a first airflow generating device is disposed in the negative pressure chamber, and the air outlet of the first airflow generating device is connected to the connecting hole; or, the first airflow generating device is disposed in the positive pressure chamber, and the air inlet of the first airflow generating device is connected to the connecting hole.

[0010] Optionally, the first airflow generating device is mounted on the separator.

[0011] Optionally, the energy storage converter also includes a filter device for filtering the airflow flowing from the first chamber to the second chamber, and / or, a filter device for filtering the airflow flowing from the second chamber to the first chamber.

[0012] Optionally, the filter device includes a mesh element, the mesh element array being provided with a plurality of through holes for airflow to pass through, and the mesh element also includes a guide vane extending outward from the edge of each through hole, the guide vane being projected onto the mesh element along the through-hole direction within the through hole.

[0013] Optionally, the filter device includes two mesh elements, one of which has a through hole connected to the other mesh element.

[0014] Optionally, the mesh element is disposed within the first cavity.

[0015] Optionally, the filtration device includes a mesh cover and an adsorbent material disposed inside the mesh cover.

[0016] Optionally, the mesh cover and adsorption material are disposed within the second cavity.

[0017] Optionally, the first airflow generating device is used to make airflow flow from outside the box to inside the first cavity, and the first airflow generating device is also used to make airflow flow from inside the first cavity to outside the box.

[0018] Optionally, the housing includes an air inlet mesh and an air outlet mesh arranged opposite to each other. The first cavity is connected to the outside of the housing through the air inlet mesh and the first cavity is also connected to the outside of the housing through the air outlet mesh.

[0019] Secondly, this application provides an energy storage system, which includes the energy storage converter described above in the first aspect of this application.

[0020] The energy storage converter enclosure of this application has a relatively small number of connecting structures between the outside and inside of the enclosure. This reduces the likelihood of foreign objects outside the enclosure contacting critical electrical components inside, and also reduces the likelihood of these components being damaged. In other words, the energy storage converter of this application has a relatively high protection level and relatively high operational reliability. In some applications, the connecting structures between the outside and inside of the enclosure can connect a first cavity to the outside of the enclosure, or the second cavity may not be directly connected to the outside of the enclosure, but rather indirectly connected through the first cavity. This allows a small number of relatively low-critical electrical components to be housed in the first cavity, while a large number of relatively high-critical electrical components can be housed in the second cavity. With this arrangement, most of the relatively high-critical electrical components inside the energy storage converter are less likely to be contacted and damaged by foreign objects outside the enclosure. Therefore, the energy storage converter of this application has a relatively high protection level and relatively high operational reliability. Accordingly, the energy storage system of this application may also include the technical effects of the energy storage converter described above, which will not be repeated here.

[0021] 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

[0022] 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.

[0023] Figure 1 A cross-sectional view of the housing of the energy storage converter provided in this application in one embodiment; Figure 2 A cross-sectional view of the housing and first airflow generating device of the energy storage converter provided in this application in one embodiment; Figure 3 A cross-sectional view of the housing and first airflow generating device of the energy storage converter provided in this application in another embodiment; Figure 4 A partial cross-sectional view of the partition plate and the first airflow generating device of the energy storage converter provided in this application in one embodiment; Figure 5 A partial cross-sectional view of the partition plate and baffle plate of the energy storage converter provided in this application in one embodiment; Figure 6A schematic diagram of the structure of the second cavity, partition plate, second airflow generating device and baffle plate of the energy storage converter provided in this application in one embodiment; Figure 7 A schematic diagram of the structure of the second cavity, partition plate, second airflow generating device, baffle plate and guide shroud of the energy storage converter provided in this application in one embodiment; Figure 8 A partial structural schematic diagram of the partition plate, baffle plate, and flow guide of the energy storage converter provided in this application in one embodiment; Figure 9 A cross-sectional view of the housing and first airflow generating device of the energy storage converter provided in this application in one embodiment; Figure 10 A cross-sectional view of the first airflow generating device and separator of the energy storage converter provided in this application in one embodiment; Figure 11 A cross-sectional view of the first airflow generating device and separator of the energy storage converter provided in this application in another embodiment; Figure 12 A cross-sectional view of the first airflow generating device and separator of the energy storage converter provided in this application in yet another embodiment; Figure 13 A partial cross-sectional view of the partition plate and filter device of the energy storage converter provided in this application in one embodiment; Figure 14 A schematic diagram of the structure of the grid element of the energy storage converter provided in this application in one embodiment; Figure 15 An exploded structural diagram of two grid elements of the energy storage converter provided in this application in one embodiment; Figure 16 A partial cross-sectional view of two grid elements of the energy storage converter provided in this application in one embodiment; Figure 17 A partial cross-sectional view of two grid elements of the energy storage converter provided in this application in another embodiment; Figure 18 A partial cross-sectional view of two grid elements of the energy storage converter provided in this application in yet another embodiment; Figure 19 A partial cross-sectional view of the grid structure of the energy storage converter provided in this application in another embodiment, wherein the guide vane is in the first position; Figure 20 A partial cross-sectional view of the grid structure of the energy storage converter provided in this application in another embodiment, wherein the guide vane is in the second position; Figure 21 A partial cross-sectional view of the partition plate, mesh cover, and adsorption material of the energy storage converter provided in this application in one embodiment; Figure 22 A partial cross-sectional view of the partition plate, air inlet shroud, and third airflow generator of the energy storage converter provided in this application in one embodiment; Figure 23 A cross-sectional view of the housing and first airflow generating device of the energy storage converter provided in this application in yet another embodiment; Figure 24 A partial cross-sectional view of the housing of the energy storage converter provided in this application in one embodiment; Figure 25 A three-dimensional structural schematic diagram of one embodiment of the energy storage converter provided in this application; Figure 26 for Figure 25 A three-dimensional structural diagram of a medium-energy storage converter from another perspective; Figure 27 for Figure 25 Exploded view of the middle box.

[0024] Explanation of reference numerals in the attached drawings: 1-box body, 1a-first box body, 1b-second box body, 1c-cover body, 11-first cavity, 111-negative pressure cavity, 112-positive pressure cavity, 12-second cavity, 13-air inlet structure, 14-air outlet structure, 15-partition plate, 151-air inlet, 152-air outlet, 16-baffle plate, 17-guide shroud, 17a-first opening, 17b-second opening, 17c-third opening, 171-shroud body, 172-diffuser plate, 18-partition, 181-flow structure, 19a-air inlet mesh hole, 1 9b-Outlet mesh hole, 2-First airflow generating device, 2a-Negative pressure side, 2b-Positive pressure side, 21-Air passage, 211-Inlet port, 212-Outlet port, 3-Second airflow generating device, 31-First component, 32-Second component, 33-Third component, 4-Filter device, 41-Mesh element, 411-Through hole, 412-Guide plate, 413-Rough part, 414-Plate body, 42-Mesh cover, 421-Mesh hole, 43-Adsorbent material, 5-Third airflow generating device, 6-Inlet cover, 61-Flow passage. Detailed Implementation

[0025] 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.

[0026] Firstly, this application provides some embodiments of energy storage converters, relating to the field of energy storage technology.

[0027] In some embodiments, please refer to Figure 1 As shown, the energy storage converter may include a housing 1 and electrical components ( Figure 1 (Not shown in the diagram), the electrical components are housed within the enclosure 1. The enclosure 1 may include a first cavity 11 and a second cavity 12. The energy storage converter may include various types of electrical components, including those for power conversion (high power level), power switching and protection (medium to high power level), control and drive (low power level), auxiliary power supply and signal conditioning (low power level), etc. Some electrical components may be housed within the first cavity 11, while others may be housed within the second cavity 12.

[0028] In some embodiments, when the electrical components are in operation, they generate heat and rise in temperature. To keep the operating temperature of the electrical components within the normal operating temperature range, the energy storage converter may have the following heat dissipation structure design.

[0029] In some embodiments, please refer to Figure 1 As shown, the first cavity 11 is connected to the outside of the housing 1. Airflow outside the housing 1 can flow into the first cavity 11 in direction F1, and airflow inside the first cavity 11 can flow out of the housing 1 in direction F2, meaning the airflow can circulate between the first cavity 11 and the outside of the housing 1. The energy storage converter may also include a first airflow generating device (…). Figure 1(Not shown in the diagram) The first airflow generating device can cause airflow to flow from the first cavity 11 along direction F3 to the second cavity 12, and the first airflow generating device can also cause airflow to flow from the second cavity 12 along direction F4 to the first cavity 11, so that the airflow circulates between the first cavity 11 and the second cavity 12, thereby circulating the airflow between the second cavity 12 and the outside of the housing 1. Through the above airflow circulation, the heat generated by the electrical components can be transferred to the outside of the housing 1, so that the operating temperature of the electrical components is controlled within the normal operating temperature range, reducing the possibility of thermal failure of the electrical components. In addition, the communication structure of the housing 1 for connecting the first cavity 11 and the outside of the housing 1 can meet the need for airflow circulation between the outside and inside of the housing 1.

[0030] In related technologies, the enclosure is provided with a first connecting structure connecting the first cavity and the outside of the enclosure, and the enclosure is also provided with a second connecting structure connecting the second cavity and the outside of the enclosure. The enclosure has a relatively large number of connecting structures, which increases the likelihood that foreign objects (such as liquids or particles) outside the enclosure will come into contact with important electrical components inside the enclosure, and the likelihood that important electrical components inside the enclosure will be damaged by foreign objects. It can also be understood that in related technologies, the protection level of the energy storage converter is relatively low, and the operational reliability of the energy storage converter is relatively low.

[0031] Based on the comparison between the energy storage converters of related technologies described above and some embodiments of the energy storage converters of this application, it can be seen that the number of communication structures for connecting the outside and inside of the housing 1 in some embodiments of the energy storage converters of this application is relatively small. The possibility of foreign objects outside the housing 1 coming into contact with important electrical components inside the housing 1 is relatively small, and the possibility of important electrical components inside the housing 1 being damaged by foreign objects is relatively small. It can also be understood that some embodiments of the energy storage converters of this application have a relatively high level of protection and a relatively high level of operational reliability.

[0032] In some embodiments, as described above, the communication structure of the enclosure 1 for connecting the outside and inside of the enclosure 1 is used to connect the first cavity 11 and the outside of the enclosure 1. Alternatively, it can be understood that the second cavity 12 is not directly connected to the outside of the enclosure 1, but is indirectly connected to the outside of the enclosure 1 through the first cavity 11. A small number of relatively low-priority electrical components can be housed in the first cavity 11, while a large number of relatively high-priority electrical components can be housed in the second cavity 12. With this arrangement, most of the relatively high-priority electrical components inside the energy storage converter are less likely to be contacted and damaged by foreign objects outside the enclosure 1. Therefore, some embodiments of the energy storage converter in this application have relatively high protection levels and relatively high operational reliability.

[0033] In some embodiments, please refer to Figure 2As shown, the first airflow generating device 2 can be disposed within the first chamber 11. When the first airflow generating device 2 is activated, it can increase the air pressure on one side and decrease the air pressure on the other side. This can be understood as the first airflow generating device 2 having a negative pressure side 2a and a positive pressure side 2b. The housing 1 can include an air inlet structure 13 and an air outlet structure 14. The first chamber 11 is connected to the second chamber 12 via the air inlet structure 13, and the second chamber 12 is connected to the first chamber 11 via the air outlet structure 14. The air inlet structure 13 is disposed on the positive pressure side 2b of the first airflow generating device 2, and the air outlet structure 14 is disposed on the negative pressure side 2a of the first airflow generating device 2. When the first airflow generator 2 is activated, the air pressure on the positive pressure side 2b increases. Some airflow located on the positive pressure side 2b can enter the second chamber 12 from the first chamber 11 via the air intake structure 13 in the direction F3. At the same time, the air pressure on the negative pressure side 2a decreases, and some airflow can enter the first chamber 11 from the second chamber 12 via the air outlet structure 14 in the direction F4 and flow to the negative pressure side 2a. Under this configuration, the positive and negative pressure difference generated by the first airflow generator 2 can cause the airflow to circulate between the first chamber 11 and the second chamber 12. This allows airflow with low heat to enter the second chamber 12 from the first chamber 11, absorb heat in the second chamber 12 and transform into airflow with high heat, and then flow from the second chamber 12 back to the first chamber 11. Combined with the configuration that the airflow can circulate within the first chamber 11 and outside the housing 1, the energy storage converter can achieve a relatively high protection level without sacrificing heat dissipation efficiency.

[0034] In some embodiments, please refer to Figure 2 As shown, the first airflow generating device 2 mentioned above can also be used to make airflow flow from the outer edge of the housing 1 in the direction F1 to the first cavity 11, and the first airflow generating device 2 mentioned above can also be used to make airflow flow from the inside of the first cavity 11 in the direction F2 to the outside of the housing 1.

[0035] In some other embodiments, the positive and negative pressure difference generated by the first airflow generating device can be mainly used to circulate the airflow between the first cavity 11 and the second cavity 12. Correspondingly, the energy storage converter may include other airflow generating devices, which are mainly used to circulate the airflow inside the first cavity 11 and outside the housing 1.

[0036] In some embodiments, please refer to Figure 3 As shown, the housing 1 may include a partition plate 15, which separates the first chamber 11 and the second chamber 12. The air intake structure 13 may include an air intake hole 151 extending through the partition plate 15. In this configuration, airflow can enter the second chamber 12 from the first chamber 11 through the air intake hole 151.

[0037] In some other embodiments (not shown in the figures), the housing may include a partition separating the first and second chambers, and the air intake structure may include an air intake pipe extending through the partition. In this configuration, airflow can enter the second chamber from the first chamber via the air intake pipe.

[0038] In some other embodiments (not shown in the figures), the housing may include a partition plate, with the first cavity and the second cavity separated by the partition plate, and the air intake structure connecting the first cavity and the second cavity may not pass through the partition plate.

[0039] In some embodiments, please refer to Figure 3 As shown, the housing 1 may include a partition plate 15, which separates the first chamber 11 and the second chamber 12. The air outlet structure 14 may include an air outlet 152 penetrating through the partition plate 15. In this configuration, airflow can enter the first chamber 11 from the second chamber 12 through the air outlet 152.

[0040] In some other embodiments (not shown in the figures), the housing may include a partition plate separating the first and second chambers, and the air outlet structure may include an air outlet pipe extending through the partition plate. In this configuration, airflow can enter the first chamber from the second chamber via the air outlet pipe.

[0041] In some other embodiments (not shown in the figures), the housing may include a partition plate, with the first cavity and the second cavity separated by the partition plate, and the air outlet structure connecting the first cavity and the second cavity may not pass through the partition plate.

[0042] The following content mainly uses "the partition plate 15 is provided with an air inlet 151 and an air outlet 152" as an example to describe the situation.

[0043] In some embodiments, please refer to Figures 4-5 As shown, the total flow area of ​​the air inlet 151 can be smaller than the total flow area of ​​the air outlet 152. Under this configuration, the flow rate of the high-heat airflow entering the first chamber 11 from the second chamber 12 through the air outlet 152 is relatively large, which means it has the advantage of relatively high heat dissipation efficiency.

[0044] In some embodiments, please refer to Figures 4-5 As shown, the partition plate 15 may be provided with multiple arrays of air inlets 151 and multiple arrays of air outlets 152.

[0045] In some other embodiments (not shown in the figures), the partition plate may be provided with an air inlet and an air outlet.

[0046] In some embodiments, please refer to Figure 5 As shown, the housing 1 may also include a baffle 16, which is disposed within the second cavity 12, separating the air inlet 151 and the air outlet 152. This can also be understood as... Figure 5 From the shown perspective, the air inlet 151 is located on one side of the thickness direction of the baffle 16, and the air outlet 152 is located on the other side of the thickness direction of the baffle 16. With this configuration, the baffle 16 prevents the airflow entering the second chamber 12 through the air inlet 151 from directly flowing back into the first chamber 11 through the air outlet 152. Instead, the baffle 16 directs the airflow entering the second chamber 12 through the air inlet 151 along a relatively circuitous path, allowing the airflow to absorb relatively more heat in the second chamber 12 before flowing back into the first chamber 11 through the air outlet 152. Therefore, the heat dissipation efficiency of the energy storage converter is relatively high.

[0047] In some embodiments, please refer to Figure 6 As shown, the energy storage converter may include a second airflow generating device 3. The second airflow generating device 3 may include a first component 31, a second component 32, and a third component 33, which are separately arranged. The first component 31, the second component 32, and the third component 33 all have airflow generating functions. The first component 31, the second component 32, and the third component 33 may be arranged at different positions in the second cavity 12. The first component 31, the second component 32, and the third component 33 may be close to different side walls of the second cavity 12. The driving airflow direction of the first component 31, the second component 32, and the third component 33 may be different. In this configuration, the airflow entering the second chamber 12 through the air inlet 151 can flow towards the first component 31 in direction F5. Driven by the first component 31, the airflow can flow from the first component 31 towards the second component 32 in direction F6. Driven by the second component 32, the airflow can flow from the second component 32 towards the third component 33 in direction F7. Driven by the third component 33, the airflow can flow from the third component 33 towards the air outlet 152 in direction F8, and then flow back to the first chamber 11 through the air outlet 152. In this configuration, the airflow can pass through most of the electrical components in the second chamber 12 and fully absorb heat. In addition, the second airflow generating device 3 can maintain a relatively high airflow velocity. Therefore, the heat dissipation efficiency of the energy storage converter is relatively high.

[0048] In some embodiments, please refer to Figures 7-8 As shown, the housing 1 may include a flow deflector 17, which is disposed within the second cavity 12. The flow deflector 17 is located between the air inlet 151 and the first component 31; alternatively, the flow deflector 17 can be described as being located between the baffle 16 and the first component 31. Airflow entering the second cavity 12 through the air inlet 151 can enter the flow deflector 17 through the first opening 17a. Some of the airflow located within the flow deflector 17 can travel along direction F... 51 The airflow moves and then flows through the second inlet 17b to the first component 31, and some airflow located within the shroud 17 can also flow in the direction F. 52The airflow flows through the third port 17c to the outlet 152. In this configuration, the airflow can flow along multiple paths in the second chamber 12, allowing it to effectively absorb heat from the electrical components. Therefore, the heat dissipation efficiency of the energy storage converter is relatively high.

[0049] In some embodiments, please refer to Figure 8 As shown, the flow deflector 17 may include a cover 171 and a flow divider 172. The cover 171 may be U-shaped and covers the partition plate 15, forming a flow guiding space by at least the flow deflector 17 and the partition plate 15. The baffle plate 16 extends to the lower part of one end of the flow deflector 17 to form the first opening 17a and the third opening 17c mentioned above. The flow divider 172 is located within the space covered by the cover 171, dividing the space covered by the cover 171 into upper and lower spaces, so that the airflow can be split between the space above the flow divider 172 and the space below the flow divider 172. Some electrical components may be installed on the flow divider 172, and other electrical components may also be installed below the flow divider 172. Under this configuration, on the one hand, the space covered by the enclosure 171 can be fully utilized to place a relatively large number of electrical components, resulting in a relatively compact structure for the energy storage converter. On the other hand, it allows for the full utilization of laminar flows at different heights within the airflow, enabling the airflow to fully absorb the heat from the electrical components and thus achieving a relatively high heat dissipation efficiency for the energy storage converter.

[0050] In some other embodiments (not shown in the figures), the fairing may include the fairing body mentioned above but not the diffuser plate.

[0051] In some embodiments, please refer to Figure 9As shown, the housing 1 may include a partition 18, which is disposed in the first cavity 11. The first cavity 11 is divided into a negative pressure cavity 111 and a positive pressure cavity 112 by the partition 18. The positive pressure cavity 112 is connected to the second cavity 12 through the air intake structure 13 (e.g., air intake hole 151) mentioned above. The second cavity 12 is connected to the negative pressure cavity 111 through the air outlet structure 14 (e.g., air outlet hole 152) mentioned above. The partition 18 is provided with a flow structure 181, through which the negative pressure cavity 111 is connected to the positive pressure cavity 112. The first airflow generating device 2 is used to make the airflow flow from the negative pressure cavity 111 to the positive pressure cavity 112 through the flow structure 181. As described above, the negative pressure chamber 111 is located on the negative pressure side 2a of the first airflow generating device 2, and the positive pressure chamber 112 is located on the positive pressure side 2b of the first airflow generating device 2. The separator 18 can reduce the possibility of airflow located on the positive pressure side 2b flowing directly to the negative pressure side 2a. In other words, the separator 18 can reduce the possibility of disordered airflow between the negative pressure side 2a and the positive pressure side 2b, allowing for a relatively large positive and negative pressure difference between the negative pressure chamber 111 and the positive pressure chamber 112. This results in a relatively high airflow circulation speed between the first chamber 11 and the second chamber 12. Therefore, the heat dissipation efficiency of the energy storage converter is relatively high.

[0052] In some embodiments, please refer to Figures 9-10 As shown, the flow structure 181 may include a connecting hole penetrating through the separator 18. The first airflow generating device 2 may be disposed within the negative pressure chamber 111, and the air outlet 212 of the air passage 21 of the first airflow generating device 2 may communicate with the flow structure 181 (connecting hole). Under this configuration, airflow can enter the positive pressure chamber 112 from the negative pressure chamber 111 through the air passage 21 and the flow structure 181 (connecting hole) in sequence.

[0053] In some other embodiments, please refer to Figure 11 As shown, the first airflow generating device 2 can be disposed in the positive pressure chamber 112, and the air inlet port 211 of the air passage 21 of the first airflow generating device 2 is connected to the flow structure 181 (connecting hole). Under this arrangement, the airflow can enter the positive pressure chamber 112 from the negative pressure chamber 111 through the flow structure 181 (connecting hole) and the air passage 21 in sequence.

[0054] In some embodiments, please refer to Figures 9-11 As shown, the first airflow generating device 2 can be installed on the partition 18 mentioned above, that is, the partition 18 can serve as a mounting bracket for the first airflow generating device 2.

[0055] The partition 18 can be installed on the structural wall used to enclose and form the first cavity 11.

[0056] In some other embodiments (not shown in the figures), the first airflow generating device may be directly mounted to the structural wall used to enclose the first cavity.

[0057] In some embodiments, please refer to Figure 12 As shown, the separator 18 may include multiple flow structures 181, and multiple first airflow generating devices 2 may be installed on the separator 18, and the air passage of each first airflow generating device 2 is connected to the corresponding flow structure 181.

[0058] In some embodiments, please refer to Figure 13 As shown, the energy storage converter may also include a filter device 4. The filter device 4 can filter the airflow flowing from the first chamber 11 to the second chamber 12 along direction F3, reducing the possibility of foreign objects entering the second chamber 12 from the first chamber 11, and reducing the possibility of damage to some important electrical components in the second chamber 12 by foreign objects. When the filter device 4 can filter dust, lint, and other substances, relatively large amounts of dust, lint, and other substances are less likely to accumulate on the surface of the electrical components in the second chamber 12. When the electrical components in the second chamber 12 generate heat, the heat can be quickly conducted from the electrical components to the airflow in the second chamber 12. Therefore, the filter device 4 can also improve the heat dissipation efficiency of the energy storage converter.

[0059] In some embodiments, the filter device 4 can also be used to filter the airflow flowing from the second chamber 12 to the first chamber 11.

[0060] In some embodiments, please refer to Figures 14-17 As shown, the filter device 4 may include a mesh element 41, the mesh element 41 array having a plurality of through holes 411 for airflow to pass through, and the mesh element 41 may also include guide vanes 412 extending outward from the edges of each through hole 411, the guide vanes 412 being along the through direction of the through hole 411 (e.g., the through direction of the through hole 411). Figure 16 The projection range of the airflow (vertical direction) onto the mesh 41 is within the through hole 411. Under this configuration, when the airflow passes through the mesh 41, the guide vane 412 changes the flow direction of the airflow. Since some liquids or particles carried by the airflow have relatively large inertia, they will collide with the guide vane 412 to consume the kinetic energy of the liquids or particles. Therefore, the guide vane 412 can prevent some liquids and particles from moving into the second chamber 12, that is, the filtration effect is relatively good.

[0061] In some embodiments, please refer to Figures 15-17 As shown, the filter device 4 may include two mesh elements 41, with the through hole 411 of one mesh element 41 connected to the through hole 411 of the other mesh element 41. This configuration provides a dual filtration effect.

[0062] Please refer to Figures 16-17 As shown, the airflow can travel along direction F 31 The filter passes through the through holes 411 of the two mesh pieces 41 in a winding manner, resulting in a relatively good filtration effect.

[0063] In some other embodiments (not shown in the figures), the filtering device may also include one, three or more mesh elements.

[0064] In some embodiments, please refer to Figure 18 As shown, the mesh element 41 may include a rough portion 413 disposed on the guide vane 412, the rough portion 413 being located on the side of the guide vane 412 near the through hole 411. In this configuration, when the airflow carries some liquid and particles along direction F... 31 When passing through the through hole 411, some liquids or particles carried by the airflow have relatively large inertia and will impact the rough part 413. The surface friction coefficient of the rough part 413 is relatively large, and the kinetic energy of the liquids or particles is quickly consumed by the rough part 413, so that the liquids and particles are less likely to move into the second chamber 12, that is, the filtration effect is relatively good.

[0065] The surface of the rough portion 413 can be processed into a rough surface or an uneven surface so that the rough portion 413 has a large coefficient of friction.

[0066] In addition, the rough part 413 can be a material with multiple micropores, such as felt or sponge, which can also adsorb liquids or particles.

[0067] In some embodiments, please refer to Figures 19-20 As shown, the mesh component 41 may include a plate 414, which may be arrayed with the aforementioned through holes 411 and the aforementioned guide vanes 412. The plate 414 and the guide vanes 412 may also be rotatably connected, and the guide vanes 412 may rotate relative to the plate 414 to such a position as... Figure 19 The first position shown or as Figure 20 The second position is shown. When the first airflow generating device 2 is not activated, there is no relatively high-speed airflow flowing from the first chamber 11 to the second chamber 12. Under the action of gravity, the guide vane 412 is positioned relative to the plate 414 as shown. Figure 19 In the first position shown, the through hole 411 is covered or blocked by the guide plate 412. When the first airflow generating device 2 is activated, the airflow generated by the first airflow generating device 2 can overcome the gravity of the guide plate 412, causing the guide plate 412 to automatically rise to the position shown. Figure 20 In the second position shown, the through hole 411 is not covered or blocked by the guide plate 412, and the airflow can flow from the first cavity 11 along the direction F. 31The air flows into the second chamber 12. In this configuration, when the energy storage converter is off, the through-hole 411 of the filter device 4 is covered or blocked by the guide plate 412, and the filter device 4 can still function as a filter, preventing dust or moisture from outside the housing 1 from easily entering the second chamber 12. Therefore, the protection level of the energy storage converter is relatively high.

[0068] In some other embodiments, Figures 19-20 The connection between the plate 414 and the guide vane 412 shown can be a detachable connection such as adhesive, snap-fit, or fastening. The guide vane 412 can be a flexible sheet. When the first airflow generating device 2 is not activated, the guide vane 412 can be positioned as follows: Figure 19 As shown in the first position, when the first airflow generating device 2 is activated, the guide vane 412 can be positioned as follows: Figure 20 The second position shown.

[0069] In some embodiments, please refer to Figures 16-17 As shown, the mesh element 41 can be disposed in the first cavity 11, and the airflow passing through the through hole 411 can flow in the direction F. 32 It enters the second chamber 12 through the intake structure 13 (e.g., intake port 151).

[0070] The mesh element 41 can be disposed on the side of the air intake structure 13 opposite to the second cavity 12.

[0071] In some other embodiments (not shown in the figure), some mesh elements with filtering function may be disposed in the first cavity and on the side of the air outlet structure opposite to the second cavity. The structure of the mesh elements in this embodiment can refer to any of the mesh element structures described above, and will not be repeated here.

[0072] In some other embodiments (not shown in the figures), some mesh elements with filtering functions may be disposed in the second cavity. These mesh elements may be disposed on the side of the air intake structure opposite to the first cavity. The structural configuration of the mesh elements in this embodiment can refer to any of the mesh element structural configurations described above, and will not be repeated here.

[0073] In some other embodiments (not shown in the figures), some mesh elements with filtering functions may be disposed in the second cavity. These mesh elements may be disposed on the side of the air outlet structure opposite to the first cavity. The structural configuration of the mesh elements in this embodiment can refer to any of the mesh element structural configurations described above, and will not be repeated here.

[0074] In some embodiments, please refer to Figure 21As shown, the filter device 4 may include a mesh cover 42 and an adsorbent material 43, with the adsorbent material 43 disposed inside the mesh cover 42. In this configuration, the adsorbent material 43 can be used to adsorb foreign matter such as liquid or particles in the airflow, and the mesh cover 42 is used to restrict the movement of the adsorbent material 43.

[0075] Please refer to Figure 21 As shown, the mesh cover 42 and the adsorption material 43 can be disposed in the second cavity 12.

[0076] Additionally, please refer to Figure 21 As shown, the mesh cover 42 can cover the adsorption material 43 on the side of the air intake structure 13 away from the first cavity 11.

[0077] Furthermore, please refer to Figure 21 As shown, the mesh cover 42 is provided with mesh holes 421 for airflow.

[0078] In some other embodiments (not shown in the figures), some mesh covers may cover the adsorbent material on the side of the vent structure away from the first cavity.

[0079] In some embodiments, the adsorbent material 43 may include at least one of physical adsorbent materials, chemical adsorbent materials, and composite adsorbent materials.

[0080] In some embodiments, the shape of the adsorbent material 43 may be blocky, sheet-like, or granular.

[0081] In some embodiments, the filter device 4 may simultaneously include the mesh element 41, mesh cover 42, and adsorbent material 43 mentioned above. The mesh element 41 may be disposed within the first cavity 11, and the mesh cover 42 and adsorbent material 43 may be disposed within the second cavity 12. When the filter device 4 is primarily used to filter the airflow from the first cavity 11 to the second cavity 12, the mesh element 41 in the first cavity 11 performs coarse filtration of foreign matter carried by the airflow, while the adsorbent material 43 in the second cavity 12 performs fine filtration of the foreign matter carried by the airflow. Therefore, the filter device 4 can perform gradient filtration of foreign matter carried by the airflow, resulting in better filtration performance.

[0082] In some other embodiments (not shown in the figures), the filtration device may include some spiral pipes. The inner wall surface of the spiral pipes may be rough or may be provided with adsorbent material. The airflow from the first chamber to the second chamber must pass through the spiral pipes. During the process of the airflow passing through the spiral pipes, some foreign objects such as liquids or particles have relatively large inertia and will hit the inner wall surface of the spiral pipes or the adsorbent material to consume the kinetic energy of the foreign objects, thereby making it difficult for foreign objects to enter the second chamber.

[0083] In some embodiments, please refer to Figure 22As shown, the energy storage converter may further include a third airflow generator 5 and an air intake shroud 6. The air intake shroud 6 is located inside the second cavity 12 and covers the side of the air intake structure 13 (e.g., air intake hole 151) opposite to the first cavity 11. The first cavity 11 can be connected to the flow channel 61 of the air intake shroud 6 through the air intake structure 13, and the flow channel 61 of the air intake shroud 6 can be connected to the second cavity 12 through the third airflow generator 5. In this configuration, when the third airflow generator 5 is activated, the suction effect generated by the third airflow generator 5 can cause the airflow to enter the second cavity 12 from the first cavity 11 sequentially through the air intake structure 13 and the flow channel 61 of the air intake shroud 6. The cross-sectional area of ​​at least a portion of the flow channel 61 of the air intake shroud 6 can be reduced along the air intake direction of the air intake shroud 6. When the airflow flows in the flow channel 61 of the air intake shroud 6, the airflow is gradually compressed by the flow channel 61, resulting in a relatively high flow velocity of the airflow entering the second cavity 12, thereby making the heat dissipation efficiency of the energy storage converter relatively high.

[0084] In some other embodiments, please refer to Figure 23 As shown, the first airflow generating device 2 can extend from the first cavity 11 to the second cavity 12. The first airflow generating device 2 can have an air passage 21, which can have an inlet port 211 and an outlet port 212. The inlet port 211 communicates with both the first and second cavities 11 and 212. The outlet port 212 communicates with both the first and second cavities 11 and 212. When the first airflow generating device 2 is activated, airflow from outside the housing 1 can enter the first cavity 11 from outside the housing 1 along direction F1, and airflow can also flow from inside the first cavity 11 to outside the housing 1 along direction F2. That is, the first airflow generating device 2 can circulate airflow between the first cavity 11 and outside the housing 1. When the first airflow generating device 2 is activated, airflow located in the first cavity 11 can flow through the inlet port 211 along direction F2. 31 Entering the air passage 21, the airflow located in the second chamber 12 can pass through the air inlet 211 along the direction F 41 Entering the airway 21, a portion of the airflow within the airway 21 can pass through the air outlet 212 along the direction F 42 Entering the first cavity 11, another part of the airflow in the air passage 21 can pass through the air outlet 212 along the direction F 32 The gas enters the second chamber 12. In this configuration, the gas entering the airway 21 from the second chamber 12 can transfer heat to the gas entering the airway 21 from the first chamber 11. This can also be understood as mixing the low-temperature airflow flowing into the airway 21 from the first chamber 11 and the high-temperature airflow flowing into the airway 21 from the second chamber 12 within the airway 21. After mixing, the gas flows along direction F... 32 The temperature of the airflow entering the second chamber 12 through the outlet port 212 is lower than that along the direction F. 41The temperature of the airflow entering the air passage 21 through the intake port 211, along the direction F 42 The temperature of the airflow entering the first chamber 11 through the outlet port 212 is higher than that along the direction F. 31 The temperature of the airflow entering the air duct 21 through the air inlet 211. According to the above structural arrangement, even when the second chamber 12 is not directly connected to the outside of the housing 1, the heat located within the second chamber 12 can be transferred to the outside of the housing 1 by the circulating airflow. Therefore, the energy storage converter of this embodiment can achieve both a high protection level and high heat dissipation efficiency.

[0085] In some embodiments, please refer to Figure 24 As shown, the housing 1 may include an air inlet mesh hole 19a and an air outlet mesh hole 19b arranged opposite to each other. The first cavity 11 is connected to the outside of the housing 1 through the air inlet mesh hole 19a, and the first cavity 11 is also connected to the outside of the housing 1 through the air outlet mesh hole 19b. The air inlet mesh hole 19a and the air outlet mesh hole 19b can be arranged opposite to each other in the front-back direction. Airflow can enter the first cavity 11 from the outside of the housing 1 through the air inlet mesh hole 19a in the direction F1, and airflow can also flow from the first cavity 11 through the air outlet mesh hole 19b in the direction F2 to the outside of the housing 1.

[0086] In some other embodiments (not shown in the figures), the air inlet mesh holes can be replaced with air inlet pipes, and the air outlet mesh holes can be replaced with air outlet pipes.

[0087] In some embodiments, the second cavity 12 may be located above the first cavity 11.

[0088] In some other embodiments (not shown in the figures), the second cavity may also be located below or to the side of the first cavity.

[0089] In some embodiments, please refer to Figures 25-27As shown, the housing 1 may include a first box 1a, a second box 1b, and a cover 1c, which are detachably connected. The first box 1a is located below the second box 1b, and the second box 1b is located below the cover 1c. The first box 1a may have a first cavity 11 as mentioned above, and an opening is provided at the top of the first box 1a. When the first box 1a is connected to the second box 1b, the opening at the top of the first box 1a is covered by the second box 1b. The second box 1b may have a second cavity 12 as described above, and an opening is provided at the top of the second box 1b. When the second box 1b is connected to the cover 1c, the opening at the top of the second box 1b is covered by the cover 1c. The second box 1b may have the partition plate 15 mentioned above. The partition plate 15 may be provided with the air intake structure 13 and air outlet structure 14 mentioned above, or in other words, the partition plate 15 may be provided with the air intake hole 151 and air outlet hole 152 mentioned above. The front side wall of the first box 1a may be provided with the air intake mesh hole 19a mentioned above, and the rear side wall of the first box 1a may be provided with the air outlet mesh hole 19b mentioned above.

[0090] In some embodiments, please refer to Figures 25-27 As shown, the surrounding sidewalls of the second box 1b do not have a communication structure (such as a mesh hole, grid hole or through hole) for directly connecting the second cavity 12 and the outside of the box 1. The second cavity 12 is indirectly connected to the outside of the box 1 through the first cavity 11.

[0091] In other embodiments (not shown in the figures), the composition of the housing may not be limited to... Figures 25-27 The structure of box 1 shown.

[0092] Any of the airflow generating devices mentioned above can be a fan, blower, compressor, or bladeless fan. For example, at least one of the first airflow generating device, the second airflow generating device, and the third airflow generating device can be a fan, blower, compressor, or bladeless fan.

[0093] Secondly, this application provides some embodiments of energy storage systems, including the embodiments of the energy storage converter provided in the first aspect of this application described above. Correspondingly, the energy storage system may also include the technical effects of the embodiments of the energy storage converter provided in the first aspect of this application described above, which will not be repeated here.

[0094] In some embodiments, the battery device is electrically connected to the power grid via an energy storage converter, which includes a DC-AC bidirectional converter. The energy storage converter can realize bidirectional energy conversion between the battery device and the power grid. The energy storage converter can also acquire the status information of the battery device in real time and send the status information of the battery device to external systems.

[0095] In some embodiments, the energy storage system may include at least two battery devices (also known as battery packs), which may store electrical energy and may also deliver electrical energy to external sources.

[0096] In the accompanying figures, every two of the vertical, horizontal, and front-back directions are perpendicular to each other.

[0097] 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 in that, The energy storage converter includes a housing and a first airflow generating device. The housing includes a first cavity, a second cavity, an air inlet structure, and an air outlet structure. The first cavity is connected to the outside of the housing. The first cavity is connected to the second cavity through the air inlet structure. The second cavity is connected to the first cavity through the air outlet structure. The first airflow generating device is disposed in the first cavity. The air inlet structure is disposed on the positive pressure side of the first airflow generating device. The air outlet structure is disposed on the negative pressure side of the first airflow generating device. The first airflow generating device is used to make airflow flow from the outside of the housing to the first cavity, and also to make airflow flow from the first cavity to the outside of the housing. The first airflow generating device is also used to make airflow flow from the second cavity to the first cavity.

2. The energy storage converter according to claim 1, characterized in that, The housing includes a partition plate, and the first cavity and the second cavity are separated by the partition plate; The air intake structure includes an air intake hole penetrating the partition plate, and / or the air outlet structure includes an air outlet hole penetrating the partition plate.

3. The energy storage converter according to claim 2, characterized in that, The total flow area of ​​the air inlet is smaller than the total flow area of ​​the air outlet.

4. The energy storage converter according to claim 2, characterized in that, The housing also includes a baffle plate, which is disposed in the second cavity, and the air inlet and the air outlet are separated by the baffle plate.

5. The energy storage converter according to claim 1, characterized in that, The housing includes a partition disposed within the first cavity, which divides the first cavity into a positive pressure cavity and a negative pressure cavity. The positive pressure cavity is connected to the second cavity via the air inlet structure, and the second cavity is connected to the negative pressure cavity via the air outlet structure. The partition is provided with a flow structure, through which the negative pressure cavity is connected to the positive pressure cavity. The first airflow generating device is used to cause the airflow to flow from the negative pressure cavity to the positive pressure cavity via the flow structure.

6. The energy storage converter according to claim 5, characterized in that, The flow structure includes a through-hole extending through the separator; The first airflow generating device is disposed in the negative pressure chamber, and the air outlet of the first airflow generating device is connected to the connecting hole; or, the first airflow generating device is disposed in the positive pressure chamber, and the air inlet of the first airflow generating device is connected to the connecting hole.

7. The energy storage converter according to claim 6, characterized in that, The first airflow generating device is installed on the separator.

8. The energy storage converter according to any one of claims 1 to 7, characterized in that, The energy storage converter further includes a filter device for filtering airflow from the first cavity to the second cavity, and / or, the filter device for filtering airflow from the second cavity to the first cavity.

9. The energy storage converter according to claim 8, characterized in that, The filtering device includes a mesh element, the mesh element array being provided with a plurality of through holes for the airflow to pass through, the mesh element also including a guide vane extending from the edge of each through hole outward from the through hole, the guide vane being projected along the through direction of the through hole onto the projection range of the mesh element within the through hole.

10. The energy storage converter according to claim 9, characterized in that, The filtration device includes two mesh elements, wherein the through hole of one mesh element is connected to the through hole of the other mesh element.

11. The energy storage converter according to claim 9, characterized in that, The mesh element is disposed within the first cavity.

12. The energy storage converter according to claim 8, characterized in that, The filtration device includes a mesh cover and an adsorbent material, wherein the adsorbent material is disposed inside the mesh cover.

13. The energy storage converter according to claim 12, characterized in that, The mesh cover and the adsorption material are disposed inside the second cavity.

14. The energy storage converter according to any one of claims 1 to 7, characterized in that, The housing includes an air inlet mesh and an air outlet mesh arranged opposite to each other. The first cavity is connected to the outside of the housing through the air inlet mesh and the air outlet mesh.

15. An energy storage system, characterized in that, The energy storage system includes the energy storage converter according to any one of claims 1 to 14.

Images