High-voltage box and energy storage battery system

Abstract

The utility model relates to the technical field of energy storage, and discloses a high-voltage box and an energy storage battery system, and the high-voltage box comprises a box body which is internally provided with a box cavity, and the box wall of the box body is provided with an air inlet and an air outlet; the fan assembly is arranged on the air inlet or the air outlet; the first electrical components are located in the box cavity, and the heating rate of the first electrical components is larger than a preset threshold value; the air blocking structure is located in the box cavity, one side of the air inlet, one side of the air outlet and one side of the air blocking structure jointly form a heat dissipation air channel flowing through the first electrical component, the box cavity comprises an air blocking area located on the other side of the air blocking structure, and the air blocking structure is used for blocking airflow between the air inlet and the air outlet from flowing to the air blocking area; and the plurality of second electrical components are arranged in the wind shielding area, and the heating rate of the second electrical components is smaller than a preset threshold value. According to the high-voltage box and the energy storage battery system, the overall operation life of the high-voltage box can be effectively prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of energy storage, and particularly relates to a high-voltage box and an energy storage battery system. BACKGROUND

[0002] The difference between the high-voltage box of the energy storage battery system and the high-voltage box of the traditional power battery is that some switching power supply modules are integrated in the high-voltage box. The power supply modules generate a large amount of heat when the battery system as a whole operates. The energy storage battery system and the power battery system operate continuously and uninterruptedly, and the long-term operation of the power supply modules causes heat accumulation in the high-voltage box, thereby reducing the service life of electrical components. The current high-voltage box scheme for industrial and commercial energy storage systems is open and naturally cooled, which causes heat accumulation in the shell and reduces the overall service life of the high-voltage box and the battery system. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a high-voltage box and an energy storage battery system, which can effectively improve the overall service life of the high-voltage box.

[0004] To achieve the above-mentioned purpose, the first aspect of the application provides a high-voltage box, which comprises:

[0005] a box body provided with a box cavity, an air inlet and an air outlet on the box wall of the box body;

[0006] a fan assembly arranged on the air inlet or the air outlet;

[0007] a plurality of first electrical components located in the box cavity, the heat generation rate of the first electrical components being greater than a preset threshold;

[0008] a wind-blocking structure located in the box cavity, the air inlet, the air outlet and one side of the wind-blocking structure collectively forming a heat dissipation air duct through the first electrical components, the box cavity comprising a wind-blocking area located on the other side of the wind-blocking structure, and the wind-blocking structure being used to block the airflow between the air inlet and the air outlet from flowing to the wind-blocking area;

[0009] a plurality of second electrical components arranged in the wind-blocking area, the heat generation rate of the second electrical components being less than the preset threshold.

[0010] In some specific embodiments, the plurality of first electrical components comprise a plurality of power supply modules, and the plurality of second electrical components comprise one or more of a contactor, a fuse, a current sensor and a battery pack control management module.

[0011] In some specific embodiments, the air outlet is located in the middle of the front side wall of the box body, the fan assembly is arranged on the air outlet, and the air inlet is arranged on the rear side wall of the box body.

[0012] In some embodiments, the first electrical components include a first power module and a second power module, the first power module and the second power module are arranged on the left or right side wall of the cabinet body in the front-rear direction, and the air inlet is located on the end of the rear side wall close to the first power module and the second power module.

[0013] In some embodiments, the first power module and the second power module are flat, and the flat surfaces of the first power module and the second power module are attached to the left or right side wall of the cabinet body.

[0014] In some embodiments, the first electrical components further include a third power module, the first power module and the second power module are arranged on one side of the heat dissipation air duct in the left-right direction, and the third power module is arranged on the other side of the heat dissipation air duct in the left-right direction, the third power module is flat, and the flat surface of the third power module is perpendicular to the direction of the heat dissipation air duct.

[0015] In some embodiments, the air outlet and the wind shielding area are arranged on both sides of the wind shielding structure, the high-voltage cabinet further includes a circuit breaker arranged in the cabinet cavity and opposite the air outlet, the wind shielding structure includes a wind shielding plate and the circuit breaker, and the wind shielding plate is connected between the circuit breaker and the front side wall.

[0016] In some embodiments, the bottom end of the circuit breaker and the wind shielding plate is connected to the bottom wall of the cabinet body by a fastener, and the top end of the circuit breaker and the wind shielding plate is connected to the top wall of the cabinet body by a foamed silica gel strip.

[0017] In some embodiments, the air inlet is a strip-shaped hole extending in the up-down direction and spaced apart in the left-right direction.

[0018] In some embodiments, the front side wall is provided with a plurality of pole terminals at both ends in the left-right direction.

[0019] In some embodiments, the fan assembly includes:

[0020] a fan body;

[0021] a fan fixing plate, the fan body being fixed to the cabinet wall of the cabinet body by the fan fixing plate;

[0022] a fan protective cover covering the fan body.

[0023] The second aspect of the application provides an energy storage battery system, which includes the high-voltage cabinet described above.

[0024] By the above technical solution, the first electrical component has a relatively fast heat generation rate, the second electrical component has a relatively slow heat generation rate, the first electrical component is arranged in the heat dissipation air duct, the second electrical component is arranged in the wind shielding area, and the wind shielding structure in the box cavity separates the heat dissipation air duct through the first electrical component from the wind shielding area to block the airflow between the air inlet and the air outlet from flowing to the wind shielding area, so as to reduce the difference between the flow cross-sectional area of the heat dissipation air duct and the area of the air inlet or the air outlet, reduce the pressure loss of the heat dissipation airflow, and more effectively dissipate heat from the main heat source with a relatively fast heat generation rate in the high-voltage box, so that the heat dissipation rate is faster and the overall heat dissipation effect is better, thereby effectively improving the overall operation life of the high-voltage box and the battery system.

[0025] Other features and advantages of the embodiments of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used together with the following detailed description to explain the embodiments of the present application, but do not constitute a limitation of the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained from the structures shown in the drawings without creative labor. In the drawings:

[0027] Figure 1 An exploded view of the structure of the high-voltage box of one embodiment of the present application is shown;

[0028] Figure 2 A partial structure schematic view of the high-voltage box in Figure 1

[0029] Figure 3 Another partial structure schematic view of the high-voltage box in Figure 1

[0030] A partial structure top view of the high-voltage box in Figure 4 Figure 3

[0031] Figure 5 A structure exploded view of the fan assembly in Figure 1

[0032] Explanation of reference signs

[0033] 1 air inlet 2 air outlet

[0034] 3 fan assembly 31 fan body

[0035] 32 fan fixing plate 33 fan protective cover ​​​​

[0036] 4 first electrical component 5 second electrical component

[0037] 61 front sidewall 611 pole terminal

[0038] 62 rear sidewall 63 left sidewall

[0039] 64 right sidewall 65 bottom wall

[0040] 66 top wall 7 circuit breaker

[0041] 8 baffle plate 9 foamed silica gel strip DETAILED DESCRIPTION

[0042] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0043] The high-voltage box of the energy storage battery system is a high-voltage power circuit management unit specially designed for the energy storage system. The electrical components in the box cavity generate a certain amount of heat during operation. The high-voltage boxes in the current industry are all shell with opening for natural heat dissipation, but the internal heat accumulation will cause the cycle life of the internal contactors and fuses and other electrical components to be reduced. In recent years, the market has continuously improved the requirements for the cycle life of the energy storage battery system, and the existing high-voltage boxes cannot meet the performance requirements of the market.

[0044] Therefore, as shown in Figure 1 , Figure 2 and Figure 3 , the first aspect of the present application provides a high-voltage box, which comprises a box body, a fan assembly 3, a plurality of first electrical components 4, a wind-blocking structure and a plurality of second electrical components 5. The box body is provided with a box cavity, the box wall of the box body is provided with an air inlet 1 and an air outlet 2, and the fan assembly 3 is arranged on the air inlet 1 or the air outlet 2. The plurality of first electrical components 4 and the plurality of second electrical components 5 are located in the box cavity, the heat generation rate of the first electrical component 4 is greater than a preset threshold, and the heat generation rate of the second electrical component 5 is less than the preset threshold. The wind-blocking structure is located in the box cavity, the air inlet 1, the air outlet 2 and one side of the wind-blocking structure jointly form a heat dissipation air duct passing through the first electrical component 4. The box cavity comprises a wind-blocking area located on the other side of the wind-blocking structure, the wind-blocking structure is used for blocking the airflow between the air inlet 1 and the air outlet from flowing to the wind-blocking area, and the plurality of second electrical components 5 are arranged in the wind-blocking area.

[0045] Wherein, the preset threshold can be set according to the actual heat dissipation requirement of the high-voltage box, the heat generation rate of the first electrical component 4 is greater than the preset threshold, and the heat generation rate of the second electrical component 5 is less than the preset threshold. It can be seen that the heat generation rate of the first electrical component 4 is relatively fast, and the heat generation rate of the second electrical component 5 is relatively slow.

[0046] The air inlet 1, the air outlet 2 and one side of the air blocking structure together define a heat dissipation air channel through which the first electrical components 4 pass, and the heat dissipation air channel is used for heat dissipation of the first electrical components 4 with a faster heat generation rate. The air blocking structure is arranged in the box cavity to divide the box cavity into two regions, one region being the heat dissipation air channel on one side of the air blocking structure and used for heat dissipation of the first electrical components 4, and the other region being an air blocking region in which the second electrical components 5 are arranged. The air blocking structure can block the airflow between the air inlet and the air outlet from flowing to the air blocking region, so that the airflow between the air inlet and the air outlet mainly flows in the heat dissipation air channel and is mainly used for heat dissipation of the first electrical components 4 with a faster heat generation rate, that is, the main heat source with a faster heat generation rate in the high-voltage box can be effectively and more targetedly heat-dissipated, so that the heat dissipation efficiency of the airflow between the air inlet and the air outlet is fully released, and the heat dissipation performance of the high-voltage box is optimized. Moreover, by arranging the air blocking structure, the difference between the cross-sectional area of the heat dissipation air channel and the area of the air inlet or the area of the air outlet can be reduced, so that the pressure loss of the heat dissipation airflow can be reduced, the overall heat dissipation rate is faster, the heat dissipation effect is better, and the overall operation life of the high-voltage box and the battery system can be effectively improved.

[0047] It should be noted that the shape and structure of the box body, the arrangement position and structure of the air inlet 1 and the air outlet 2 on the box wall of the box body, the type and structure of the fan assembly, the structure and arrangement position of the air blocking structure, the number and type of components included in the plurality of first electrical components 4, and the number and type of components included in the plurality of second electrical components 5 can be various.

[0048] For example, the box body can be square, prismatic or other irregular shapes, and the box wall of the box body can be spliced by a plurality of structural members; the air inlet 1 and the air outlet 2 can be round holes, square holes or other shapes, and the air inlet 1 and the air outlet 2 can be arranged on the side wall or the top wall of the box body; the fan assembly can be a blower or an exhaust fan, the blower is arranged at the air inlet 1, and the exhaust fan is arranged at the air outlet 2; the air blocking structure can be arranged adjacent to the air inlet 1 and / or the air outlet 2 and can include one or more air blocking plates; the plurality of first electrical components 4 can include one or more power modules, and the plurality of second electrical components 5 can include one or more of a contactor, a fuse, a current sensor and a battery pack control management module, and these structural forms should also belong to the protection scope of the present application.

[0049] Optionally, as shown in Figure 4 in order to reduce the pressure loss of the heat dissipation airflow and improve the heat dissipation effect, the heat dissipation air channel is arranged in the front-rear direction, the air outlet 2 is located on the front side wall 61 of the box body, and the air inlet 1 is arranged on the rear side wall 62 of the box body. In addition, as shown in Figure 3As shown in the figures, the front side wall 61 of the box body is provided with a plurality of pole terminals 611 at both ends in the left-right direction, and a rotating operation handle is further arranged on the middle part of the front side wall 61, and the rotating shaft of the rotating operation handle penetrates the front side wall 61 and is connected with the circuit breaker 7. The air outlet 2 can be arranged on the middle part of the front side wall 61 of the box body, so that the overall structure of the high-voltage box is more reasonable.

[0050] Optionally, as shown in the figures, Figure 1 and Figure 3 The fan assembly 3 is an air extractor and is arranged on the air outlet 2. In this way, the airflow of the heat dissipation air duct is more stable, the amount of air flowing to the wind-blocking area is reduced, and the heat dissipation effect can be further optimized.

[0051] Optionally, the plurality of first electrical components 4 can include first and second power modules, which are arranged on the left or right side wall 63 of the box body in the front-rear direction and are spaced apart from each other, and the air inlet 1 is located on the end of the rear side wall 62 that is relatively close to the first and second power modules. The first and second power modules are flat, and the flat surfaces of the first and second power modules are attached to the left or right side wall 63 of the box body. The first and second power modules can be DC power modules, which are the main heat sources in the high-voltage box. By specifically dissipating heat from the main heat sources in the high-voltage box, the overall heat dissipation effect of the high-voltage box can be effectively improved.

[0052] Specifically, in some embodiments, as shown in the figures, Figure 3 and Figure 4 The box body is square, and the left side wall 63 is a flat wall. The first and second power modules are arranged on the left side wall 63 of the box body in the front-rear direction and are spaced apart from each other. In this way, the left side wall 63 can serve as a duct wall of the heat dissipation air duct, so that the airflow of the heat dissipation air duct can flow along the substantially straight left side wall 63, which is more stable and can further optimize the heat dissipation effect.

[0053] Optionally, as shown in the figures, Figure 3 and Figure 4 The plurality of first electrical components 4 can further include a third power module. The first and second power modules are arranged on one side of the heat dissipation air duct in the left-right direction, and the third power module is arranged on the other side of the heat dissipation air duct in the left-right direction. The third power module is flat, and the flat surface of the third power module is perpendicular to the direction of the heat dissipation air duct. In this way, the two sides of the third power module can be cooled, and the cooling effect is better.

[0054] Optionally, the high-voltage box further includes a circuit breaker 7 arranged in the box cavity and opposite the air outlet 2, and the wind-blocking structure includes the wind-blocking plate 8 and the circuit breaker 7, and the wind-blocking plate 8 is connected between the circuit breaker 7 and the front side wall 61. Specifically, as shown in the figures,Figure 2 and Figure 4 As shown, the windbreak structure is arranged adjacent to the air outlet 2, and the air outlet 2 is arranged separately from the windbreak area on both sides of the windbreak structure, that is, the air outlet 2 and the second electrical component 5 are arranged separately on both sides of the windbreak structure. The circuit breaker 7 is arranged parallel to and spaced apart from the front side wall 61, and the air outlet 2 is positioned opposite the left end of the circuit breaker 7. The wind baffle 8 is perpendicular to the front side wall 61 and is connected between the right end of the circuit breaker 7 and the inner side of the front side wall 61. In this way, the airflow enters the box cavity from the air inlet 1, flows along the front-back direction and along the left side wall 63 to the air outlet 2, and is drawn out of the box cavity by the fan assembly 3 at the air outlet 2, thereby effectively dissipating heat from the first electrical component 4, which has a high heat generation rate.

[0055] Optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the bottom ends of the circuit breaker 7 and the wind baffle 8 are connected to the bottom wall 65 of the enclosure body by fasteners, and the top ends of the circuit breaker 7 and the wind baffle 8 are connected to the top wall 66 of the enclosure body by foamed silicone strips 9. In this way, the top and bottom ends of the wind baffle structure are connected to the top wall 66 and the bottom wall 65 of the enclosure body respectively, reducing the air leakage gap and making the wind baffle structure more effective in blocking wind and improving heat dissipation.

[0056] Optionally, such as Figure 1 and Figure 3 As shown, the air inlet 1 is a strip-shaped hole extending in the vertical direction and has multiple holes spaced apart in the horizontal direction. In this way, the structure of the box body is reasonable and reliable, and the heat dissipation performance is good.

[0057] Optionally, such as Figure 5 As shown, considering that the fan is a vulnerable part, in order to facilitate disassembly and maintenance in the future, the fan assembly 3 may include a fan body 31, a fan fixing plate 32 and a fan protective cover 33. The fan body 31 is fixed to the box wall of the box body by the fan fixing plate 32, and the fan protective cover 33 is placed on the fan body 31.

[0058] A second aspect of this application also provides an energy storage battery system including the aforementioned high-voltage box. Since the energy storage battery system includes the aforementioned high-voltage box, it also possesses all the technical effects brought about by the high-voltage box.

[0059] Optionally, the energy storage battery system may also include a monitoring system for detecting the temperature inside the high-voltage box. When the monitoring system detects an abnormal temperature inside the high-voltage box, it can control the start of the fan body 31 to remove some of the internal heat through the optimized heat dissipation duct, effectively improving the heat dissipation effect.

[0060] In summary, compared with the industry general high-voltage box product scheme, the high-voltage box of the application adds an air inlet and integrates a fan assembly, which can extract cold air inside the battery cabinet, so that the internal thermal field of the high-voltage box is uniform, and the ideal heat dissipation effect of the electrical components is achieved, and the operation life of the power module and the corresponding electrical components is improved. In addition, by adding a wind blocking structure in the box cavity and optimizing the arrangement of the electrical components to control the direction of the heat dissipation air duct, the accumulation of heat of the electrical components in the high-voltage box can be effectively reduced, and the service life of the electrical components is improved.

[0061] In the description of the present application, it should be understood that the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0062] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0063] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0064] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A high pressure tank characterized by, The utility model relates to a high voltage box, comprising: a box body, a box cavity is arranged in the box body, an air inlet (1) and an air outlet (2) are arranged on the box wall of the box body; a fan assembly (3) is arranged on the air inlet (1) or the air outlet (2); a plurality of first electrical components (4) are arranged in the box cavity, the heat generation rate of the first electrical components (4) is greater than a preset threshold value; a wind shielding structure is arranged in the box cavity, the air inlet (1), the air outlet (2) and one side of the wind shielding structure jointly form a heat dissipation air duct through the first electrical components (4), the box cavity comprises a wind shielding area on the other side of the wind shielding structure, and the wind shielding structure is used for blocking the airflow between the air inlet (1) and the air outlet (2) from flowing to the wind shielding area; a plurality of second electrical components (5) are arranged in the wind shielding area, and the heat generation rate of the second electrical components (5) is less than the preset threshold value.

2. The high pressure tank of claim 1, wherein, The plurality of first electrical components (4) comprise a plurality of power modules, and the plurality of second electrical components (5) comprise one or more of a contactor, a fuse, a current sensor and a battery pack control management module.

3. The high pressure tank of claim 1, wherein, The air outlet (2) is located in the middle of the front side wall (61) of the box body, the fan assembly (3) is arranged on the air outlet (2), and the air inlet (1) is arranged on the rear side wall (62) of the box body.

4. The high pressure tank of claim 3, wherein, The plurality of first electrical components (4) comprise first and second power modules, the first and second power modules are arranged on the left side wall (63) or the right side wall (64) of the box body in a front-rear direction, and the air inlet (1) is located on the end of the rear side wall (62) relatively close to the first and second power modules.

5. The high pressure tank of claim 4, wherein, The first and second power modules are flat, and the flat surfaces of the first and second power modules are attached to the left side wall (63) or the right side wall (64) of the box body. And / or, the plurality of first electrical components (4) further comprise a third power module, the first and second power modules are arranged on one side of the heat dissipation air duct in a left-right direction, and the third power module is arranged on the other side of the heat dissipation air duct in the left-right direction, the third power module is flat, and the flat surface of the third power module is perpendicular to the direction of the heat dissipation air duct.

6. The high pressure tank of claim 3, wherein The air outlet (2) and the wind shielding area are arranged on the two sides of the wind shielding structure, the high voltage box further comprises a circuit breaker (7) arranged in the box cavity and opposite to the air outlet (2), the wind shielding structure comprises a wind shielding plate (8) and the circuit breaker (7), and the wind shielding plate (8) is connected between the circuit breaker (7) and the front side wall (61).

7. The high pressure tank of claim 6, wherein, The bottom ends of the circuit breaker (7) and the wind shielding plate (8) are connected to the bottom wall (65) of the box body by fasteners, and the top ends of the circuit breaker (7) and the wind shielding plate (8) are connected to the top wall (66) of the box body by foamed silica gel strips (9).

8. The high pressure tank of claim 3, wherein, The air inlet (1) is in the form of a strip-shaped hole extending in the up-down direction and is provided with multiple air inlets in the left-right direction. And / or, the front side wall (61) is provided with a plurality of pole terminals (611) at both ends in the left-right direction, respectively.

9. The high pressure tank of claim 1, wherein, The fan assembly (3) comprises: A fan body (31); A fan fixing plate (32), the fan body (31) is fixed on the tank wall of the tank body through the fan fixing plate (32); A fan protection cover (33) is arranged on the fan body (31).

10. An energy storage battery system, characterized by, The high-voltage tank comprises the high-voltage tank according to any one of claims 1 to 9.

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