Energy storage converter

Abstract

The present application relates to the field of energy storage technologies, and provides an energy storage converter, which is at least beneficial to improving the heat dissipation efficiency of the energy storage converter. The energy storage converter includes: a box body, a partition board, a radiator, and a fan assembly. The first partition board divides the high-voltage area of the box body into an upper high-voltage area and a lower high-voltage area which are arranged up and down; the second partition board and the third partition board divide the low-voltage area of the box body into an upper low-voltage area, a middle low-voltage area, and a lower low-voltage area which are arranged in sequence from top to bottom; the radiator is located between the lower low-voltage area and the lower high-voltage area; the fan assembly is located in the lower high-voltage area; the cooling air passes through the fan assembly from the air inlet, passes through the radiator, and then discharges from the air outlet after reaching the lower low-voltage area, so as to form a first air flow channel; a plurality of ventilation holes are provided on one side of the first partition board close to the radiator, and the cooling air flows from the air inlet through the fan assembly and the ventilation holes to the middle low-voltage area, so as to form a second air flow channel; the air flow rate of the first air flow channel is greater than that of the second air flow channel.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and particularly relates to an energy storage converter. Background Art

[0002] The high-voltage box and the power conversion system (PCS) of the energy storage system are core components in the energy storage system. The PCS is the core component for realizing bidirectional power flow between the energy storage system and the power grid, and is used to control the charging and discharging processes of the battery and perform AC-DC conversion; the high-voltage box is equipped with a control circuit for controlling the charging and discharging processes to ensure the safety and stability of the energy storage system. The combined energy storage converter with the control circuit and the PCS integrated can adopt a divided cavity design, where the higher-power electronic devices are located in the high-voltage area, and external fans, heat exchangers, inductors (low-power devices), etc. are located in the low-voltage area to improve the integration density of the energy storage converter.

[0003] Currently, the heat dissipation system in the energy storage converter blows cooling air into the box through a fan to cool each device in the energy storage converter. However, the cooling air circulates in the box. When the cooling air passes through a device with a higher temperature, the temperature of the cooling air rises, and the heat dissipation efficiency is significantly reduced when the heated cooling air cools other devices. Summary of the Invention

[0004] An embodiment of this application provides an energy storage converter, which is at least beneficial to improving the heat dissipation efficiency of the energy storage converter.

[0005] According to some embodiments of the present application, on the one hand, an energy storage inverter provided by the embodiments of the present application includes: a box body, the box body includes a high-voltage area and a low-voltage area arranged adjacent to each other; a first partition, the first partition is located in the high-voltage area, the first partition divides the high-voltage area into an upper high-voltage area and a lower high-voltage area arranged up and down, and an air inlet is provided on the side of the lower high-voltage area of the box body away from the low-voltage area; a second partition, the second partition is located in the low-voltage area, and the second partition is arranged on the same layer as the first partition; a third partition, the third partition is located in the low-voltage area, and the third partition is located above the second partition, the second partition and the third partition divide the low-voltage area into an upper low-voltage area, a middle low-voltage area and a lower low-voltage area arranged from top to bottom in sequence, and an air outlet is provided on the side of the lower low-voltage area of the box body away from the high-voltage area; a radiator, the radiator is located between the lower low-voltage area and the lower high-voltage area, one side of the first partition close to the low-voltage area is fixed to the top of the radiator, and one side of the second partition close to the high-voltage area is fixed to the top of the radiator; a fan assembly, the fan assembly is located in the lower high-voltage area, and the air outlet direction of the fan assembly faces the radiator; wherein, the cooling air passes through the fan assembly from the air inlet, passes through the radiator to the lower low-voltage area and then is discharged from the air outlet to form a first air flow channel; a plurality of ventilation holes are provided on one side of the first partition close to the radiator, and the cooling air flows from the air inlet through the fan assembly and the ventilation holes to the middle low-voltage area to form a second air flow channel; the air flow rate of the first air flow channel is greater than the air flow rate of the second air flow channel.

[0006] In some embodiments, at least one exhaust hole is provided on the side of the middle low-voltage area and / or the upper low-voltage area of the box body away from the high-voltage area, and an exhaust fan is provided on the exhaust hole.

[0007] In some embodiments, the upper part of at least one air outlet is located in the upper low-voltage area, and the lower part is located in the middle low-voltage area.

[0008] In some embodiments, the exhaust fan extracts the gas in the upper low-voltage area to form a third air flow channel, and the air flow rate of the third air flow channel is less than the air flow rate of the second air flow channel.

[0009] In some embodiments, the fan assembly includes: an air inlet net, the air inlet net is detachably fixed to the air inlet; a fan bracket, the fan bracket is detachably fixed to the air inlet net; a fan, the fan is detachably fixed to the fan bracket.

[0010] In some embodiments, the bottom of the box body has a guide rail, and the fan bracket is movably fixed on the guide rail.

[0011] In some embodiments, the first partition includes a first part, a second part and a third part connected in sequence, the height of the first part relative to the bottom surface of the box body is higher than the height of the third part relative to the bottom surface of the box body, one side of the third part away from the second part is fixed to the top of the radiator, and the ventilation holes are located on the second part.

[0012] In some embodiments, at least one of the first partition, the second partition, or the third partition includes a plurality of bent portions, and a plurality of fixing holes are provided on the bent portions. The first partition, the second partition, or the third partition is fixed to the inner wall of the box body by bolts passing through the fixing holes.

[0013] In some embodiments, a buffer pad is provided between the inner wall of the box body and the bent portion, and the material of the buffer pad includes rubber.

[0014] In some embodiments, it further includes: two fixing portions oppositely arranged along the direction perpendicular to the arrangement direction of the high-pressure area and the low-pressure area. The fixing portions are located between the lower-layer low-pressure area and the lower-layer high-pressure area and are fixed to the inner wall of the box body. Both ends of the radiator are fixed to the fixing portions, so that the radiator is suspended in the box body.

[0015] The technical solution provided by the embodiments of the present application has at least the following advantages:

[0016] In the energy storage converter provided by the embodiments of the present application, the box body includes an adjacent high-pressure area and a low-pressure area. The high-pressure area is used to arrange high-power devices, and the low-pressure area is used to arrange low-power devices to improve the integration density of the energy storage converter. The first partition divides the high-pressure area into an upper-layer high-pressure area and a lower-layer high-pressure area arranged up and down. The second partition and the third partition divide the low-pressure area into an upper-layer low-pressure area, a middle-layer low-pressure area, and a lower-layer low-pressure area arranged from top to bottom in sequence. In this way, the space of the high-pressure area and the low-pressure area can be further divided into regions. An air inlet is provided on the side of the lower-layer high-pressure area of the box body away from the low-pressure area, and an air outlet is provided on the side of the lower-layer low-pressure area of the box body away from the high-pressure area. The radiator is located between the lower-layer low-pressure area and the lower-layer high-pressure area. Cooling air enters from the air inlet, passes through the fan assembly and the radiator, and then discharges from the air outlet after reaching the lower-layer low-pressure area, so as to form a unidirectional first air flow channel. In this way, the high-temperature air after cooling the radiator by the cooling air directly discharges through the air outlet and will not continue to circulate in the box body, thereby avoiding the high-temperature air from affecting the heat dissipation of other devices. A plurality of ventilation holes are provided on the side of the first partition close to the radiator. Cooling air enters from the air inlet, passes through the fan assembly and the ventilation holes, and flows to the middle-layer low-pressure area, so as to form a unidirectional second air flow channel. In this way, for the devices arranged in the middle-layer low-pressure area, on the one hand, they are directly arranged on the radiator to dissipate heat through the radiator, and on the other hand, they can also dissipate heat through the second air flow channel formed in the middle-layer low-pressure area, improving the heat dissipation efficiency of the devices in the middle-layer low-pressure area. The air flow rate of the first air flow channel is greater than that of the second air flow channel. In this way, most of the heat generated by the devices on the radiator is dissipated through the first air flow channel. Even if a small part of the heat is transferred to the devices on the side farther away from the high-pressure area through the second air flow channel, it will not have too much impact on the heat dissipation of the devices at the tail of the second air flow channel, which is beneficial to the devices on the side farther away from the high-pressure area in the middle-layer low-pressure area to also have a good heat dissipation effect. Description of the Drawings

[0017] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation. To more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the energy storage converter provided by the embodiment of the present application from one perspective;

[0019] Figure 2 It is a schematic structural diagram of the energy storage converter provided by the embodiment of the present application from another perspective;

[0020] Figure 3 It is a schematic internal structure diagram of an energy storage converter provided by the embodiment of the present application;

[0021] Figure 4 It is a schematic structural diagram of a first partition provided by the embodiment of the present application;

[0022] Figure 5 It is a schematic structural diagram of a fan assembly provided by the embodiment of the present application;

[0023] Figure 6 It is a schematic structural diagram of a second partition provided by the embodiment of the present application;

[0024] Figure 7 It is a schematic structural diagram of a third partition provided by the embodiment of the present application.

[0025] Reference numerals

[0026] 100 - Cabinet; 101 - High - pressure area; 102 - Low - pressure area; 103 - Upper - layer high - pressure area; 104 - Lower - layer high - pressure area; 105 - Upper - layer low - pressure area; 106 - Middle - layer low - pressure area; 107 - Lower - layer low - pressure area; 108 - Air inlet; 109 - Air outlet; 110 - First partition; 111 - First part; 112 - Second part; 113 - Third part; 114 - Ventilation hole; 120 - Second partition; 121 - Fourth part; 122 - Fifth part; 123 - Sixth part; 124 - Hollow part; 130 - Third partition; 131 - Seventh part; 132 - Eighth part; 133 - Ninth part; 134 - Isolation part; 140 - Radiator; 150 - Fan assembly; 151 - Air - inlet net; 152 - Fan bracket; 153 - Fan; 160 - Exhaust hole; 161 - Exhaust fan; 170 - Pit; 180 - Inductor; 190 - Bending part; 193 - Fixing part. Detailed implementation manners

[0027] As can be seen from the background art, the heat - dissipation efficiency of the energy - storage converter needs to be improved.

[0028] The embodiment of the present application provides an energy - storage converter, which is at least beneficial to improving the heat - dissipation efficiency of the energy - storage converter.

[0029] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary - secondary relationship of the indicated technical features.

[0030] In the description of the embodiments of the present application, the meaning of "a plurality of" is more than two, unless otherwise specifically and clearly defined.

[0031] Referring to "embodiment" in this text means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0032] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: there is A, there is both A and B, and there is B. In addition, the character " / " in this text generally represents an "or" relationship between the front - and - back associated objects.

[0033] In the description of the embodiments of the present application, technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0034] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0035] In the description of the embodiments of the present application, when a certain component "includes" another component, unless otherwise stated, other components are not excluded, and other components may further be included.

[0036] The terms used in the description of various embodiments herein are only for describing specific embodiments and are not intended to be limiting. As used in the description of the various embodiments and the appended claims, "component" is also intended to include the plural form unless the context clearly indicates otherwise.

[0037] The embodiments of the present application will be described in detail below with reference to the drawings. However, those of ordinary skill in the art can understand that in the embodiments of the present application, many technical details are provided for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can still be implemented.

[0038] Figure 1 It is a schematic structural diagram of the energy storage converter provided by the embodiment of the present application from one perspective; Figure 2 It is a schematic structural diagram of the energy storage converter provided by the embodiment of the present application from another perspective; Figure 3 It is a schematic internal structure diagram of an energy storage converter provided by the embodiment of the present application; Figure 4 It is a schematic structural diagram of a first partition provided by the embodiment of the present application. Figure 3For ease of illustration, taking the case where the box body 100 is in a perspective state as an example, the border of the box body 100 and the demarcation line between the high-voltage area 101 and the low-voltage area 102 are shown by a dashed box.

[0039] In the attached drawings provided in this embodiment, the X-axis direction is the width direction of the box body 100 of the energy storage converter, the Y-axis direction is the length direction of the box body 100 of the energy storage converter, and the Z-axis direction is the height direction of the box body 100 of the energy storage converter.

[0040] Reference Figures 1 to 4 The energy storage converter provided in the embodiment of the present application includes: a box body 100 and a first partition 110, a second partition 120, a third partition 130, a radiator 140 and a fan assembly 150 arranged in the box body 100.

[0041] The box body 100 includes an adjacent high-voltage area 101 and a low-voltage area 102; the first partition 110 is located in the high-voltage area 101, and the first partition 110 divides the high-voltage area 101 into an upper high-voltage area 103 and a lower high-voltage area 104 arranged up and down. One side of the lower high-voltage area 104 of the box body 100 away from the low-voltage area 102 has an air inlet 108; the second partition 120 is located in the low-voltage area 102, and the second partition 120 is arranged on the same layer as the first partition 110; the third partition 130 is located in the low-voltage area 102, and the third partition 130 is located above the second partition 120. The second partition 120 and the third partition 130 divide the low-voltage area 102 into an upper low-voltage area 105, a middle low-voltage area 106 and a lower low-voltage area 107 arranged from top to bottom. One side of the lower low-voltage area 107 of the box body 100 away from the high-voltage area 101 has an air outlet 109; the radiator 140 is located between the lower low-voltage area 107 and the lower high-voltage area 104. One side of the first partition 110 close to the low-voltage area 102 is fixed to the top of the radiator 140, and one side of the second partition 120 close to the high-voltage area 101 is fixed to the top of the radiator 140; the fan assembly 150 is located in the lower high-voltage area 104, and the air outlet direction of the fan assembly 150 faces the radiator 140.

[0042] Among them, the cooling air passes through the fan assembly 150 from the air inlet 108, passes through the radiator 140 to the lower low-voltage area 107 and then is discharged from the air outlet 109 to form a first air flow channel. With reference to Figure 3 and Figure 4 , there are a plurality of ventilation holes 114 on one side of the first partition 110 close to the radiator 140. The cooling air flows from the air inlet 108 through the fan assembly 150 and the ventilation holes 114 to the middle low-voltage area 106 to form a second air flow channel; the air flow rate of the first air flow channel is greater than that of the second air flow channel.

[0043] In the energy storage converter provided by the embodiment of the present application, the box body 100 includes an adjacent high-voltage area 101 and a low-voltage area 102. The high-voltage area 101 is used to arrange high-power devices, and the low-voltage area 102 is used to arrange low-power devices to improve the integration density of the energy storage converter. The first partition 110 divides the high-voltage area 101 into an upper high-voltage area 103 and a lower high-voltage area 104 arranged up and down. The second partition 120 and the third partition 130 divide the low-voltage area 102 into an upper low-voltage area 105, a middle low-voltage area 106, and a lower low-voltage area 107 arranged from top to bottom in sequence. In this way, the space of the high-voltage area 101 and the low-voltage area 102 can be further divided into regions. One side of the lower high-voltage area 104 of the box body 100 away from the low-voltage area 102 has an air inlet 108, and one side of the lower low-voltage area 107 of the box body 100 away from the high-voltage area 101 has an air outlet 109. The radiator 140 is located between the lower low-voltage area 107 and the lower high-voltage area 104. The cooling air passes through the fan assembly 150 from the air inlet 108 through the radiator 140 to the lower low-voltage area 107 and then is discharged from the air outlet 109 to form a one-way flowing first air flow channel. In this way, the high-temperature air after the cooling air cools the radiator 140 is directly discharged through the air outlet 109 and will not continue to circulate in the box body 100, thereby avoiding the high-temperature air from affecting the heat dissipation of other devices. One side of the first partition 110 close to the radiator 140 has a plurality of ventilation holes 114. The cooling air flows from the air inlet 108 through the fan assembly 150 and the ventilation holes 114 to the middle low-voltage area 106 to form a one-way flowing second air flow channel. In this way, for the devices arranged in the middle low-voltage area 106, on the one hand, they are directly arranged on the radiator 140 to dissipate heat through the radiator 140, and on the other hand, they can also dissipate heat through the second air flow channel formed by the middle low-voltage area 106, improving the heat dissipation efficiency of the devices in the middle low-voltage area 106. The air flow rate of the first air flow channel is greater than the air flow rate of the second air flow channel. In this way, most of the heat generated by the devices on the radiator 140 is dissipated through the first air flow channel. Even if a small part of the heat is transferred to the devices on the side farther away from the high-voltage area 101 through the second air flow channel, it will not have too much impact on the heat dissipation of the devices at the tail of the second air flow channel, which is beneficial to the devices on the side farther away from the high-voltage area 101 in the middle low-voltage area 106 to also have a good heat dissipation effect.

[0044] In some embodiments, a switch baffle can be arranged at the ventilation hole, and the switch baffle can control the opening or closing of the ventilation hole. In this way, the required number of ventilation holes can be adjusted according to the ambient temperature of the energy storage converter, and then the air flow rate of the second air flow channel can be adjusted. For example, when the operating temperature is relatively low and the heat dissipation requirement is relatively low, the switch baffles of some ventilation holes can be closed to reduce the air flow rate of the second air flow channel and avoid the problem of abnormal operation caused by the too low temperature of the device after heat dissipation.

[0045] Combined with referenceFigure 2 and Figure 3 On one side of the middle - layer low - pressure area 106 and / or the upper - layer low - pressure area 105 of the box body 100 away from the high - pressure area 101, there may be at least one exhaust hole 160, and an exhaust fan 161 is arranged on the exhaust hole 160. The exhaust fan 161 on the exhaust hole 160 can facilitate the discharge of the cooling air passing through the second air flow channel, thereby avoiding the accumulation of heat in the box body 100 and improving the heat dissipation efficiency of the energy storage converter.

[0046] In some embodiments, referring to Figure 3 , the upper part of at least one exhaust hole 160 may be located in the upper - layer low - pressure area 105, and the lower part may be located in the middle - layer low - pressure area 106. In this way, the upper - layer low - pressure area 105 and the middle - layer low - pressure area 106 can share one exhaust fan 161 to achieve unidirectional air flow, reduce the installation cost of the exhaust fan 161, and at the same time improve the heat dissipation efficiency of the devices in the upper - layer low - pressure area 105 and the middle - layer low - pressure area 106.

[0047] In some embodiments, the exhaust fan 161 extracts the gas in the upper - layer low - pressure area 105 to form a third air flow channel, and the air flow rate of the third air flow channel is less than that of the second air flow channel. In this way, devices with a higher heat generation rate, such as power boards or DC - Link capacitors, can be arranged in the middle - layer low - pressure area 106, and devices with a lower heat generation rate, such as battery management systems, control boards or auxiliary capacitor boards, can be arranged in the upper - layer low - pressure area 105. By partitioning and arranging devices with different heat generation rates, it is beneficial to the effective heat dissipation of each layer of devices.

[0048] Furthermore, when the upper - layer low - pressure area 105 and the middle - layer low - pressure area 106 can share one exhaust fan 161, for the same exhaust hole 160, the area of the exhaust hole 160 located in the middle - layer low - pressure area 106 is larger than the area of the exhaust hole 160 located in the upper - layer low - pressure area 105, so as to achieve that the air flow rate of the third air flow channel is less than that of the second air flow channel.

[0049] Referring to Figure 1 , pits 170 may be arranged on both sides of the box body 100 along the width direction, which is beneficial to the handling of the energy storage converter.

[0050] Figure 5 It is a schematic structural diagram of a fan assembly provided by an embodiment of the present application.

[0051] Combined with reference 3 and Figure 5, the fan assembly 150 includes: an air inlet net 151, which is detachably fixed to the air inlet 108; a fan bracket 152, which is detachably fixed to the air inlet net 151; and a fan 153, which is detachably fixed to the fan bracket 152. In this way, the fan 153 can be detachably fixed to the box body 100 through the fan bracket 152 and the air inlet net 151. When the fan 153 needs to be maintained, the air inlet net 151 at the air inlet 108 can be directly removed to extract the fan 153, and it is not necessary to disassemble the third partition 130, the second partition 120, and the first partition 110 layer by layer to achieve the repair and maintenance of the fan 153.

[0052] In this embodiment, take the example that multiple fans 153 are fixed by the same fan bracket 152 and the same air inlet net 151; in other embodiments, the air inlet net and the fan bracket can be set to be multiple, so as to form multiple relatively independent fan assemblies. The multiple fan assemblies are respectively fixed to the box body through their respective air inlet nets. In this way, when repairing or maintaining a single fan subsequently, it is not necessary to disassemble other fan assemblies.

[0053] In some embodiments, the bottom of the box body may have a guide rail (not shown in the figure), and the fan bracket is movably fixed on the guide rail. In this way, when the fan assembly is installed or disassembled through the air inlet of the box body, it can be directionally moved through the guide rail, which is beneficial to improving the installation efficiency of the fan assembly and the box body, and is also beneficial to improving the stability of the fan assembly installed in the box body.

[0054] Reference Figure 4 , the first partition 110 may include a first part 111, a second part 112, and a third part 113 that are connected in sequence. The height of the first part 111 relative to the bottom surface of the box body is higher than the height of the third part 113 relative to the bottom surface of the box body. One side of the third part 113 away from the second part 112 is fixed to the top of the radiator, and the ventilation hole 114 is located on the second part 112. In this way, the first part 111 and the third part 113 are arranged in a staggered layer, so that the cooling air gathers at the second part 112, and the ventilation hole 114 is arranged on the second part 112, which is beneficial to the cooling air flowing efficiently through the ventilation hole 114 to the middle-layer low-pressure area.

[0055] Figure 6 It is a schematic structural diagram of a second partition provided by an embodiment of the present application.

[0056] Reference Figure 6 , the second partition 120 may also include a fourth part 121, a fifth part 122, and a sixth part 123 that are connected in sequence. The height of the fourth part 121 relative to the bottom surface of the box body is higher than the height of the fifth part 122 relative to the bottom surface of the box body. One side of the sixth part 123 away from the fifth part 122 is fixed to the top of the radiator.

[0057] Combined reference Figure 3 and Figure 6 As shown, the lower low-voltage area 107 may include a plurality of inductors 180. The second partition 120 may include a hollowed-out portion 124. The orthographic projection of the inductor 180 on the bottom surface of the box body 100 is located within the orthographic projection of the hollowed-out portion 124 on the bottom surface of the box body 100. The inductor 180 has a relatively large volume. Arranging it in the lower low-voltage area 107 can help improve the space utilization rate. Providing the hollowed-out portion 124 on the second partition 120 can prevent electromagnetic interference between the second partition 120 and the inductor 180.

[0058] Figure 7 FIG. 10 is a schematic structural diagram of a third partition provided by an embodiment of the present application.

[0059] Reference Figure 7 As shown, the third partition 130 may include a seventh portion 131, an eighth portion 132, and a ninth portion 133 that are sequentially connected. The height of the seventh portion 131 relative to the bottom surface of the box body is higher than the height of the ninth portion 133 relative to the bottom surface of the box body. In this way, the staggered seventh portion 131 and ninth portion 133 are beneficial for setting corresponding placement positions for devices of different heights, so as to improve the space utilization rate of the upper low-voltage area.

[0060] Combined reference Figure 3 and Figure 7 As shown, on the side of the seventh portion 131 and the ninth portion 133 close to the high-voltage area 101, they are bent towards the bottom surface of the box body 100 to form a partition portion 134. The partition portion 134 has mesh holes arranged in an array. The partition portion 134 can be used to isolate the devices between the high-voltage area 101 and the low-voltage area 102. The mesh holes on the partition portion 134 can form electromagnetic shielding to prevent electromagnetic interference between the devices in the high-voltage area 101 and the devices in the low-voltage area 102.

[0061] In some embodiments, the orthographic projection of the seventh portion 131 on the bottom surface of the box body overlaps partially with the orthographic projection of the second partition 120 on the bottom surface of the box body, and the orthographic projection of the ninth portion 133 on the bottom surface of the box body does not overlap with the orthographic projection of the second partition 120 on the bottom surface of the box body. In this way, the height of some devices on the second partition 120 can exceed the distance between the second partition 120 and the third partition 130, so that larger devices can be arranged on the second partition 120.

[0062] In some embodiments, at least one of the first partition 110, the second partition 120, or the third partition 130 includes a plurality of bending portions 190. The bending portions 190 have a plurality of fixing holes. The first partition 110, the second partition 120, or the third partition 130 is fixed to the inner wall of the box body 100 by bolts passing through the fixing holes.

[0063] In other embodiments, a plurality of support portions are provided on the inner wall of the box body. The support portion includes a first support portion and a second support portion connected to each other. The first support portion is parallel to the side wall surface of the box body, and the second support portion is parallel to the bottom surface of the box body. The first support portion is used to be fixed to the side wall of the box body, and the second support portion is used to be fixed to the first partition, the second partition or the third partition.

[0064] In some embodiments, a buffer pad (not shown in the figure) is provided between the inner wall of the box body and the bent portion. The material of the buffer pad includes rubber. The buffer pad can avoid the problem that the box body, the first partition, the second partition or the third partition are deformed due to mutual extrusion after thermal expansion and contraction.

[0065] With reference to Figures 1 to 3 , the energy storage converter may further include: two fixing portions 193 oppositely arranged along the direction perpendicular to the arrangement direction of the high-voltage area 101 and the low-voltage area 102. The fixing portion 193 is located between the lower-layer low-voltage area 107 and the lower-layer high-voltage area 104 and is fixed to the inner wall of the box body 100. Both ends of the radiator 140 are fixed to the fixing portion 193, so that the radiator 140 is suspended in the box body 100. Suspending the radiator 140 in the box body 100 through the fixing portion 193 can facilitate the bottom of the radiator 140 to pass through the cooling air, thereby improving the heat dissipation effect of the radiator 140.

[0066] In the energy storage converter provided by the embodiment of the present application, the box body 100 includes an adjacent high-voltage area 101 and a low-voltage area 102. The high-voltage area 101 is used to arrange high-power devices, and the low-voltage area 102 is used to arrange low-power devices to improve the integration density of the energy storage converter. The first partition 110 divides the high-voltage area 101 into an upper high-voltage area 103 and a lower high-voltage area 104 arranged up and down. The second partition 120 and the third partition 130 divide the low-voltage area 102 into an upper low-voltage area 105, a middle low-voltage area 106, and a lower low-voltage area 107 arranged in sequence from top to bottom. In this way, the space of the high-voltage area 101 and the low-voltage area 102 can be further divided into regions. One side of the lower high-voltage area 104 of the box body 100 away from the low-voltage area 102 has an air inlet 108, and one side of the lower low-voltage area 107 of the box body 100 away from the high-voltage area 101 has an air outlet 109. The radiator 140 is located between the lower low-voltage area 107 and the lower high-voltage area 104. The cooling air passes through the fan assembly 150 from the air inlet 108 through the radiator 140 to the lower low-voltage area 107 and then is discharged from the air outlet 109 to form a one-way flowing first air flow channel. In this way, the high-temperature air after the cooling air cools the radiator 140 is directly discharged through the air outlet 109 and will not continue to circulate in the box body 100, thereby avoiding the high-temperature air from affecting the heat dissipation of other devices. The side of the first partition 110 close to the radiator 140 has a plurality of ventilation holes 114. The cooling air flows from the air inlet 108 through the fan assembly 150 and the ventilation holes 114 to the middle low-voltage area 106 to form a one-way flowing second air flow channel. In this way, for the devices arranged in the middle low-voltage area 106, on the one hand, they are directly arranged on the radiator 140 to dissipate heat through the radiator 140, and on the other hand, they can also dissipate heat through the second air flow channel formed by the middle low-voltage area 106, improving the heat dissipation efficiency of the devices in the middle low-voltage area 106. The air flow rate of the first air flow channel is greater than that of the second air flow channel. In this way, most of the heat generated by the devices on the radiator 140 is dissipated through the first air flow channel. Even if a small part of the heat is transferred to the devices on the side further away from the high-voltage area 101 through the second air flow channel, it will not have too much impact on the heat dissipation of the devices at the end of the second air flow channel, which is beneficial to the devices on the side further away from the high-voltage area 101 in the middle low-voltage area 106 to also have a good heat dissipation effect.

[0067] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present application. In actual applications, various changes can be made in form and details without departing from the spirit and scope of the present application. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. An energy storage converter, characterized in that: include: A box body, the box body comprising a high-pressure area and a low-pressure area arranged adjacent to each other; a first partition, the first partition being located in the high-pressure area, the first partition dividing the high-pressure area into an upper high-pressure area and a lower high-pressure area arranged one above the other, the lower high-pressure area of ​​the box having an air inlet on a side away from the low-pressure area; A second partition, the second partition is located in the low-pressure area, and the second partition is arranged on the same layer as the first partition; a third partition, the third partition being located in the low-pressure zone, and the third partition being located above the second partition, the second partition and the third partition dividing the low-pressure zone into an upper low-pressure zone, a middle low-pressure zone and a lower low-pressure zone arranged in sequence from top to bottom, and the lower low-pressure zone of the box body having an air outlet on a side away from the high-pressure zone; A radiator, wherein the radiator is located between the lower low-pressure zone and the lower high-pressure zone, a side of the first partition plate close to the low-pressure zone is fixed to the top of the radiator, and a side of the second partition plate close to the high-pressure zone is fixed to the top of the radiator; A fan assembly, wherein the fan assembly is located in the lower high-pressure area, and the air outlet direction of the fan assembly is toward the radiator; The cooling air passes through the fan assembly from the air inlet, through the radiator, to the lower low-pressure zone, and then is discharged from the air outlet to form a first air flow channel; the first partition plate has a plurality of ventilation holes on one side close to the radiator, and the cooling air flows from the air inlet through the fan assembly and the ventilation holes to the middle low-pressure zone to form a second air flow channel; The wind flow rate of the first wind flow channel is greater than the wind flow rate of the second wind flow channel.

2. The energy storage converter according to claim 1, characterized in that: The middle layer low pressure area and / or the upper layer low pressure area of ​​the box body has at least one exhaust hole on a side away from the high pressure area, and an exhaust fan is arranged on the exhaust hole.

3. The energy storage converter according to claim 2, characterized in that: The upper portion of at least one of the air outlets is located in the upper low-pressure zone, and the lower portion is located in the middle low-pressure zone.

4. The energy storage converter according to any one of claims 2 or 3, characterized in that: The exhaust fan draws out the gas in the upper low-pressure zone to form a third wind flow channel, and the wind flow rate of the third wind flow channel is lower than the wind flow rate of the second wind flow channel.

5. The energy storage converter according to claim 1, characterized in that: The fan assembly comprises: An air inlet net, the air inlet net being detachably fixed to the air inlet; A fan bracket, wherein the fan bracket is detachably fixed to the air inlet net; A fan is detachably fixed to the fan bracket.

6. The energy storage converter according to claim 5, characterized in that: The bottom of the box body is provided with a guide rail, and the fan bracket is movably fixed on the guide rail.

7. The energy storage converter according to claim 1, characterized in that: The first partition includes a first part, a second part and a third part connected in sequence, the height of the first part relative to the bottom surface of the box body is higher than the height of the third part relative to the bottom surface of the box body, the side of the third part away from the second part is fixed to the top of the radiator, and the ventilation hole is located on the second part.

8. The energy storage converter according to claim 1, characterized in that: At least one of the first partition, the second partition or the third partition includes a plurality of bending portions, the bending portions have a plurality of fixing holes, and the first partition, the second partition or the third partition is fixed to the inner wall of the box body by bolts passing through the fixing holes.

9. The energy storage converter according to claim 8, characterized in that: A buffer pad is provided between the inner wall of the box body and the bent portion, and the material of the buffer pad includes rubber.

10. The energy storage converter according to claim 1, characterized in that: Also includes: Two fixing parts are arranged opposite to each other along a direction perpendicular to the arrangement direction of the high-pressure zone and the low-pressure zone, the fixing parts are located between the lower low-pressure zone and the lower high-pressure zone, and are fixed to the inner wall of the box, and the two ends of the radiator are fixed on the fixing parts so that the radiator is suspended in the box.

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