Air-cooling energy storage device

Abstract

The present application relates to an air-cooling energy storage device. The air-cooling energy storage device comprises a cabinet body, a battery cluster, and an air-cooling structure. The cabinet body is provided with air inlets. The battery cluster is disposed in the cabinet body; the battery cluster comprises battery cell boxes; each battery cell box is provided with air intake ports and an exhaust port; and the air intake ports are communicated with the air inlets. The air-cooling structure is disposed on the cabinet body; the air-cooling structure is provided with an air outlet and a return air inlet; the air outlet is communicated with the air inlets; and the return air inlet is located on the side of the battery cluster provided with the exhaust ports and is communicated with the exhaust ports. The height between the return air inlet and the end of the battery cluster far away from the air inlets is H1, the height of the battery cluster is H2, and H1 and H2 satisfy: 1 / 6≤H1 / H2≤2 / 5. According to the air-cooling energy storage device, the temperature difference of the air-cooling energy storage device can be reduced.

Description

Air-cooled energy storage device Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to an air-cooled energy storage device. Background Art

[0002] With the rapid rise of the energy storage industry, air-cooled energy storage devices (e.g., air-cooled energy storage cabinets) have gained recognition among consumers for their simple structure and low cost. However, their performance and safety have also gradually become a focus of attention. Air-cooled energy storage devices are becoming increasingly sophisticated, placing higher demands on their air ducts. Improper air duct design can lead to significant temperature differences within the device, degrading its overall performance and, in severe cases, causing safety hazards and accidents.

[0003] Application Contents

[0004] Based on this, it is necessary to provide an air-cooled energy storage device that can reduce the temperature difference of the air-cooled energy storage device to address the above problems.

[0005] An air-cooled energy storage device, comprising:

[0006] a box body having an air inlet;

[0007] A battery cluster is disposed in the box, the battery cluster includes a cell box, the cell box has an air inlet and an air outlet, the air inlet is connected to the air inlet; and

[0008] an air cooling structure provided on the box body, the air cooling structure having an air outlet and an air return port, the air outlet being connected to the air inlet, and the air return port being located on a side of the battery cluster having the air outlet and being connected to the air outlet;

[0009] The height between the return air port and the end of the battery cluster away from the air inlet is H1, the height of the battery cluster is H2, and H1 and H2 satisfy: 1 / 6≤H1 / H2≤2 / 5.

[0010] In one embodiment, H1 and H2 satisfy: 1 / 5≤H1 / H2≤1 / 3.

[0011] In one embodiment, the side of the battery cluster having the exhaust port is the air outlet side of the battery cluster, and the box body has a mounting plate opposite to the air outlet side. In the arrangement direction of the mounting plate and the air outlet side, the distance between the return air port and the air outlet side is L1, and the distance between the air outlet side and the mounting plate is L2, and L1 and L2 satisfy: 2 / 5≤L1 / L2≤4 / 5.

[0012] In one embodiment, the air cooling structure includes an air cooling body and a return air duct, the return air duct is connected to the air cooling body, the air outlet is located on the air cooling body, and the return air outlet is located at one end of the return air duct away from the air cooling body.

[0013] In one embodiment, the air-cooling body is an air-cooling air conditioner.

[0014] In one embodiment, the side of the battery cluster having the exhaust port is the air outlet side of the battery cluster, the box has a mounting plate opposite to the air outlet side, and the return air duct is located in the box and mounted on the mounting plate.

[0015] In one embodiment, the air inlet is located at the upper end or the lower end of the box;

[0016] The return air duct is in a long strip shape and extends in the up and down direction, and the return air duct is arranged parallel to the air outlet side and spaced apart.

[0017] In one embodiment, the air-cooling body has a body return air port, the body return air port is located on a side of the return air duct away from the air outlet side, and the return air duct is connected to the air-cooling body through the body return air port.

[0018] In one embodiment, the main body return air inlet and the air outlet are both located on a side of the mounting plate close to the air outlet side.

[0019] In one embodiment, the air inlet is located at the upper end or the lower end of the box.

[0020] In one embodiment, the box body has a cold air channel extending in an up-down direction, and the air inlet is located at the upper end or the lower end of the cold air channel.

[0021] In one embodiment, the side of the battery cluster having the exhaust port is the air outlet side of the battery cluster, the air outlet side is located in the first direction, there are multiple cold air channels, and the multiple cold air channels are arranged at intervals along the second direction, the first direction, the second direction and the up and down directions are perpendicular to each other, there are multiple battery cell boxes, and the multiple battery cell boxes are arranged in an array, and each column of the battery cell boxes is located between two adjacent cold air channels.

[0022] In one embodiment, both sides of the battery box in the second direction have the air inlet.

[0023] In one embodiment, it also includes a wind cover and a wind scoop, the wind cover is arranged on one end of the box body having the air inlet, and forms an air inlet space between the wind cover and the air inlet, and the wind scoop connects the air outlet and the air inlet space.

[0024] In one embodiment, the end of the wind scoop connected to the air outlet is the first end, the end of the wind scoop connected to the air inlet space is the second end, and the wind flow area of ​​the second end is larger than the wind flow area of ​​the first end.

[0025] In one embodiment, a guide plate is provided in the second end so that the second end has a plurality of flow-balancing channels.

[0026] In one embodiment, the side of the battery cluster having the exhaust port is the air outlet side of the battery cluster, the air outlet side is located in a first direction, the housing has a cold air channel extending in a vertical direction, the air inlet is located at an upper end or a lower end of the cold air channel, there are multiple cold air channels, and the multiple cold air channels are arranged at intervals along a second direction, and the first direction, the second direction, and the vertical direction are perpendicular to each other;

[0027] The first end and the second end are arranged along the first direction.

[0028] In one embodiment, in the second direction, the width of the second end is D1, the width of the entire cold air channel formed by the plurality of the cold air channels is D2, and the ratio of D1 to D2 is 5 / 10-9 / 10.

[0029] In one embodiment, the box body includes a main frame and an installation frame, wherein the main frame and the installation frame both have an open side located in the circumferential direction, and the open side of the main frame and the open side of the installation frame are sealed and enclosed to form the box body;

[0030] The battery cluster is located in the main frame, and the side of the battery cluster having the exhaust port is the air outlet side of the battery cluster, and the air outlet side faces the installation frame;

[0031] The air cooling structure is arranged on the installation frame.

[0032] In one embodiment, the air inlet is located on the upper side of the main frame, and the upper side of the mounting frame protrudes beyond the upper side of the main frame;

[0033] The air-cooled energy storage device further includes an air hood and an air scoop, wherein the air hood is provided on a portion of the mounting frame protruding from the main frame and is covered on the upper side of the main frame, and the air hood cooperates with the upper side of the main frame to form an air inlet space;

[0034] The air scoop is arranged in the installation frame and communicates with the air outlet and the air inlet space.

[0035] In the above-mentioned air-cooled energy storage device, H1 and H2 are set to satisfy: 1 / 6≤H1 / H2≤2 / 5, thereby increasing the length of the cold air flow trajectory of the upper (or lower) battery box, reducing the length of the cold air flow trajectory of the lower (or upper) battery box, narrowing the gap between the cold air flow trajectories of the upper and lower battery boxes, and trying to keep the distance of the cold air flow trajectories of the upper and lower battery boxes consistent. Since the length of the cold air flow trajectory of each battery box is basically the same, the flow resistance of each battery box is basically the same, the air intake volume of each battery box remains basically the same, and the temperature difference of the battery cells of the entire air-cooled energy storage device is greatly improved, ensuring that the temperature difference is controlled within a more ideal range, improving the overall performance, reliability and safety of the air-cooled energy storage device, and reducing the energy consumption of the air-cooled energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] FIG1 is a schematic structural diagram of an air-cooled energy storage device in one embodiment of the present application;

[0038] FIG2 is an exploded view of the air-cooled energy storage device shown in FIG1 from one perspective;

[0039] FIG3 is an exploded view of the air-cooled energy storage device shown in FIG1 from another perspective;

[0040] FIG4 is a partial schematic diagram of the air-cooled energy storage device shown in FIG1 ;

[0041] FIG5 is a schematic diagram of the cold air flow trajectory of the air-cooled energy storage device shown in FIG1 ;

[0042] FIG6 is a side view of FIG4;

[0043] FIG7 is a schematic structural diagram of a battery box of the air-cooled energy storage device shown in FIG1 ;

[0044] FIG8 is an exploded view of the battery box shown in FIG7 . DETAILED DESCRIPTION

[0045] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0048] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0049] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0051] 1 to 6 , the air-cooled energy storage device 10 in a preferred embodiment of the present application includes a box 200 , a battery cluster 300 and an air-cooling structure 400 .

[0052] The housing 200 has an air inlet 202a.

[0053] The battery cluster 300 is housed within the housing 200. The battery cluster 300 includes a cell box 310. The cell box 310 has an air inlet 312a and an air outlet 312b. The air inlet 312a communicates with the air inlet 202a. Specifically, in this embodiment, the cell box 310 has a heat dissipation channel 312. The air inlet 312a and the air outlet 312b are located at opposite ends of the heat dissipation channel 312.

[0054] The air cooling structure 400 is mounted on the housing 200. It has a return air vent 400a and an outlet 400b. The outlet 400b is connected to the air inlet 202a. The return air vent 400a is located on the side of the battery cluster 300 with the exhaust vent 312b and is connected to the exhaust vent 312b. The side of the battery cluster 300 with the exhaust vent 312b is the air outlet side 302 of the battery cluster 300.

[0055] The height between the return air port 400a and the end of the battery cluster 300 away from the air inlet 202a is H1, and the height of the battery cluster 300 is H2. H1 and H2 satisfy: 1 / 6≤H1 / H2≤2 / 5.

[0056] When the above-mentioned air-cooled energy storage device 10 is working, the air-cooling structure 400 can provide cold air to the battery box 310 through the air outlet 400b, the air inlet 202a and the air inlet 312a, and the air-cooling structure 400 can introduce the air discharged from the exhaust port 312b into the air-cooling structure 400 through the return air port 400a to form cold air again.

[0057] When the air-cooling structure 400 provides cooling air to the battery cluster 300 through the air outlet 400b, air inlet 202a, and air inlet 312a, the cooling air flows along the following trajectory: air outlet 400b - air inlet 202a - air inlet 312a - return air outlet 400a. If the value of H1 / H2 is too large, the air outlet 400b and return air outlet 400a of the air-cooling structure 400 will be relatively close to each other. As the battery cluster 300 increases in height, it can be assumed that the air outlet 400b and return air outlet 400a of the air-cooling structure 400 are both located at the upper (or lower) end of the cooling air duct 202. This results in a shorter cooling air flow path for the upper (or lower) battery cell boxes 310 of the battery cluster 300, while a longer cooling air flow path for the lower (or upper) battery cell boxes 310 of the battery cluster 300. The shorter the cold air flow path, the lower the flow resistance. Under the same conditions, the greater the cold air intake volume. This results in a larger air intake volume for the upper (or lower) cell boxes 310 of the battery cluster 300, while a smaller air intake volume for the lower (or upper) cell boxes 310. This results in better cooling of the cells in the upper (or lower) cell boxes 310, while poorer cooling of the cells in the lower (or upper) cell boxes 310. This leads to a significant temperature difference in the air-cooled energy storage device 10, degrading the overall performance of the air-cooled energy storage device 10, and even potentially causing safety hazards or accidents. If the value of H1 / H2 is too small, while the temperature difference in the air-cooled energy storage device 10 can be reduced, the overall length of the cold air flow path will increase, increasing resistance and power consumption.

[0058] Taking the temperature difference and power consumption into comprehensive consideration, in the above-mentioned air-cooled energy storage device 10, H1 and H2 are set to satisfy: 1 / 6≤H1 / H2≤2 / 5, thereby increasing the length of the cold air flow trajectory of the upper (or lower) battery box 310, reducing the length of the cold air flow trajectory of the lower (or upper) battery box 310, narrowing the gap between the cold air flow trajectories of the upper and lower battery boxes 310, and trying to keep the distance of the cold air flow trajectories of the upper and lower battery boxes 310 consistent. Since the length of the cold air flow trajectory of each battery box 310 is basically the same, the flow resistance of each battery box 310 is basically the same, and the air intake volume of each battery box 310 remains basically the same. The temperature difference of the battery cells of the entire air-cooled energy storage device 10 is greatly improved, ensuring that the temperature difference is controlled within a more ideal range, improving the overall performance, reliability and safety of the air-cooled energy storage device 10, and reducing the energy consumption of the air-cooled energy storage device 10.

[0059] Specifically, in this embodiment, H1 and H2 satisfy: 1 / 5 ≤ H1 / H2 ≤ 1 / 3. This can better balance temperature difference and energy consumption. It is understood that in other embodiments, the value of H1 / H2 can be set according to actual needs.

[0060] In this embodiment, the housing 200 has a mounting plate 222 opposite to the air outlet side 302. In the arrangement direction of the mounting plate 222 and the air outlet side 302, the distance between the return air outlet 400a and the air outlet side 302 is L1, and the distance between the air outlet side 302 and the mounting plate 222 is L2. L1 and L2 satisfy: 2 / 5≤L1 / L2≤4 / 5. If the value of L1 / L2 is too small, the distance between the return air outlet 400a and the air outlet side 302 will be too close, which will affect the air outlet 312b of the air outlet side 302. If the value of L1 / L2 is too large, the distance between the return air outlet 400a and the air outlet side 302 will be too far, resulting in a large wind resistance for the entire air-cooled energy storage device 10. Taking into account the air outlet effect and the size of the wind resistance, L1 and L2 are set to satisfy: 2 / 5≤L1 / L2≤4 / 5. It is understood that in other embodiments, the ratio of L1 to L2 can be set according to actual needs. It should be noted that after the size of L2 is determined, the size of L1 can be determined according to the ratio of L1 to L2.

[0061] In this embodiment, the battery cluster 300 includes a plurality of cell boxes 310. The plurality of cell boxes 310 are arranged in an array. It is understood that in other embodiments, the plurality of cell boxes 310 may also be arranged in a row in the vertical direction.

[0062] In this embodiment, the air inlet 202a is located at the upper end of the housing 200. This allows the cool air to diffuse rapidly from the upper end to the lower end, taking advantage of the downward tendency of the cool air. It is understood that in other embodiments, the air inlet 202a may also be located at the lower end of the housing 200. It is understood that in other embodiments, the air inlet 202a may also be located at the left end, right end, upper end, or lower end of the housing 200.

[0063] In this embodiment, the housing 200 has a cold air duct 202. The cold air duct 202 extends vertically. The air inlet 202a is located at the upper or lower end of the cold air duct 202. The vertically extending cold air duct 202 facilitates the transfer of cold air between the upper and lower ends of the battery cluster 200.

[0064] In this embodiment, the air-cooling structure 400 includes an air-cooling body 410 and a return air duct 420. The return air duct 420 is connected to the air-cooling body 410. The air outlet 400b is located on the air-cooling body 410. The return air outlet 400a is located at the end of the return air duct 420 away from the air-cooling body 410. This makes the air-cooling structure 400 very easy to manufacture.

[0065] In this embodiment, the return air duct 420 is located within the housing 200 and mounted on the mounting plate 222. This greatly facilitates installation of the return air duct 420. It is understood that in other embodiments, the return air duct 420 may also be installed through the mounting plate 222, with part of the return air duct 420 located within the housing 200 and part of the return air duct 420 located outside the housing 200.

[0066] In this embodiment, the return air vent 400a opens toward the end away from the air inlet 202a in the vertical direction. For example, when the air inlet 202a is located at the upper end of the cold air duct 202, the return air vent 400a opens downward. This allows the size of the housing 200 to be reduced while ensuring an appropriate distance between the return air vent 400a and the air outlet side 302. It will be appreciated that in other embodiments, the return air vent 400a may also open toward the air outlet side 302. In this case, the end of the return air duct 420 with the return air vent 400a may be L-shaped.

[0067] In this embodiment, the return air duct 420 is in the shape of an elongated strip and extends in the up-down direction, and the return air duct 420 is arranged parallel to and spaced apart from the air outlet side 302. In this way, it is very convenient to manufacture the above-mentioned air-cooled energy storage device 10. Moreover, at this time, if the width of the return air duct 420 is L3 in the arrangement direction of the mounting plate 222 and the air outlet side 302, according to the ratio of L1 to L2, it can be known that the ratio of L3 to L2 is 1 / 5-3 / 5. That is, at this time, the ratio of L3 to L2 can be determined based on the ratio of L1 to L2, so that after L2 is determined, L3 can be determined based on the ratio of L3 to L2, that is, the width of the return air duct 420 in the arrangement direction of the mounting plate 222 and the air outlet side 302 is determined.

[0068] In this embodiment, the return air duct 420 can be made of composite materials or stainless steel, and the return air duct 420 can be fixed to the mounting plate 222 by various means such as bolts or welding.

[0069] In this embodiment, the air-cooled body 410 has a body return air port 410a. The body return air port 410a is located on the side of the return air duct 420 away from the air outlet side 302. The return air duct 420 is connected to the air-cooled body 410 through the body return air port 410a. This greatly facilitates the manufacture of the air-cooled energy storage device 10. Furthermore, once the height H2 of the battery cluster 300 is determined, the length of the return air duct 420 can be determined based on the height of the body return air port 410a and the ratio of H1 to H2. It will be appreciated that in other embodiments, the body return air port 410a may also be located at the end of the return air duct 420.

[0070] In this embodiment, the main body return air inlet 410a and the air outlet 400b are both located on the side of the mounting plate 222 near the air outlet side 302. This greatly facilitates the manufacture of the aforementioned air-cooled energy storage device 10. More specifically, in this embodiment, in the vertical direction, the air inlet 202a is located at the upper end of the cold air duct 202, the air outlet 400b is located above the main body return air inlet 410a, and the main body return air inlet 410a is located above the return air inlet 400a. This greatly facilitates the assembly of the aforementioned air-cooled energy storage device 10.

[0071] In this embodiment, the air outlet side 302 is located in the first direction (front-to-back direction). There are multiple (greater than or equal to two) cold air channels 202. Multiple cold air channels 202 are arranged at intervals along the second direction (left-right direction). Each row of battery boxes 310 is located between two adjacent cold air channels 202. Among them, the first direction, the second direction and the up-down direction are perpendicular to each other, and a rectangular coordinate system can be constructed. In this way, it is very convenient for the cold air channel 202 to supply cold air to the heat dissipation channel 312. It can be understood that in other embodiments, there can be only one cold air channel 202, and the cold air channel 202 is located on the side of the battery cluster 300 away from the air outlet side 302, that is, when the air outlet side 302 is the front side of the battery cluster 300, the cold air channel 202 is located on the rear side of the battery cluster 300.

[0072] In this embodiment, the cell box 310 has air inlets 312a on both sides (left and right) in the second direction. This makes it easier for the cold air duct 202 to supply cool air to the heat dissipation duct 312. It is understood that in other embodiments, the air inlets 312a may be provided only on the left or right side of the cell box 310. Alternatively, the air inlets 312a may be provided on at least one of the top, bottom, and rear sides of the cell box 310, rather than on both the left and right sides.

[0073] In this embodiment, the air-cooled energy storage device 10 further includes a hood 600 and a scoop 700. The hood 600 is disposed on one end of the cold air channel 202 having the air inlet 202a, and forms an air inlet space between the hood 600 and the air inlet 202a. The scoop 700 connects the air outlet 400b with the air inlet space. When the air-cooling structure 400 is in operation, cold air passes through the scoop 700 into the hood 600 above the cold air channel 202, and then enters the cold air channel 202. This makes it very convenient for the air outlet 400b of the air-cooling structure 200 to evenly provide cold air to multiple cold air channels 202 at the same time. It is understood that in other embodiments, the air-cooled energy storage device 10 may also include only the hood 600 or the scoop 700, and the hood 600 or the scoop 700 may first be connected to the air outlet 400b through a hose, and then connected to the air inlet 202a.

[0074] In this embodiment, the end of the scoop 700 that communicates with the air outlet 400b is a first end 710, and the end of the scoop 700 that communicates with the air inlet space is a second end 720. The airflow area of ​​the second end 720 is greater than that of the first end 710. This facilitates the air outlet 400b of the air-cooling structure 200 to evenly supply cool air to multiple cold air passages 202 simultaneously. It is understood that in other embodiments, the airflow area of ​​the second end 720 of the scoop 700 may be substantially the same as that of the first end 710. Specifically, in this embodiment, the scoop 700 is bell-shaped.

[0075] In this embodiment, the first end 710 and the second end 720 are arranged along the first direction (front-back direction), so as to facilitate the construction of the flow direction of the cold air.

[0076] In this embodiment, in the second direction (left-right direction), the width of the second end 720 is D1, and the width of the entire cold air passage 202 is D2. The ratio of D1 to D2 is 5 / 10-9 / 10. This facilitates the air outlet 400b of the air-cooling structure 200 to evenly supply cool air to the multiple cold air passages 202 simultaneously. It will be appreciated that in other embodiments, the ratio of D1 to D2 can be adjusted based on actual needs.

[0077] In this embodiment, a deflector is provided within the second end 720, so that the second end 720 has multiple flow-distributing channels. This allows the cold air blown out of the air outlet 400b of the air-cooling structure 200 to be more reasonably distributed to the multiple cold air channels 202, preventing the central cold air channel 202 from having a large air volume while the cold air channels 202 on both sides have a small air volume. This facilitates the air outlet 400b of the air-cooling structure 200 to simultaneously and evenly supply cold air to the multiple cold air channels 202. It is understood that in other embodiments, there may be only one deflector, or the deflector may be omitted.

[0078] In this embodiment, the housing 200 includes a main frame 210 and an installation frame 220. Both the main frame 210 and the installation frame 220 have an open side located in the circumferential direction. The open side of the main frame 210 and the open side of the installation frame 220 are sealed and enclosed to form the housing 200. The cold air duct 202 and the battery cluster 300 are located in the main frame 210, and the air outlet side 302 of the battery cluster 300 faces the installation frame 220. The air cooling structure 400 is provided on the installation frame 220. Specifically, the air cooling body 410 is provided on the installation frame 220, and the return air duct 420 is located in the installation frame 220 and is provided on the installation frame 220. In this way, it is very convenient to assemble the above-mentioned air-cooled energy storage device 10. It can be understood that in other embodiments, a door panel can be used to replace the above-mentioned installation frame 220. The door panel is arranged on the opening side of the main frame 210, and the air-cooling body 410 and the return air duct 420 are both arranged on the door panel. The return air duct 420 is located in the box body 200.

[0079] In this embodiment, the opening side of the main frame 210 and the opening side of the installation frame 220 are docked and sealed to form the box body 200, that is, the opening side of the main frame 210 and the opening side of the installation frame 220 are substantially the same size. In this way, the above-mentioned air-cooled energy storage device 10 can have a greater space utilization rate. It is understood that in other embodiments, the opening side of the main frame 210 and the opening side of the installation frame 220 can also be plugged in and sealed to form the box body 200, that is, the opening side of the main frame 210 and the opening side of the installation frame 220 are larger and smaller, and the smaller one is inserted into the larger one.

[0080] In this embodiment, the air inlet 202a is located on the upper side of the main frame 210, that is, in this embodiment, cold air is provided to the battery cluster 300 from top to bottom through the cold air channel 202. The upper side of the mounting frame 220 protrudes beyond the upper side of the main frame 210. The wind shield 600 is provided on the portion of the mounting frame 220 that protrudes beyond the main frame 210 and is covered on the upper side of the main frame 210. The wind shield 600 cooperates with the upper side of the main frame 210 to form an air inlet space. The wind scoop 700 is provided in the mounting frame 220 and connects the air outlet 400b with the air inlet space. This not only makes it very convenient for the air outlet 400b of the air-cooling structure 200 to uniformly provide cold air to multiple cold air channels 202 at the same time, but also makes it very convenient to manufacture the above-mentioned air-cooled energy storage device 10.

[0081] In this embodiment, the battery cluster 300 is mounted within the main frame 210 via the bracket 800. This makes it very easy to install the battery cluster 300 within the main frame 210. It will be appreciated that in other embodiments, when the main frame 210 itself is capable of mounting the battery cluster 300, the bracket 800 may be omitted.

[0082] In this embodiment, the air-cooling structure 400 and the box body 200 form a closed cavity, and the cold air blown out by the air-cooling structure 400 enters into each battery box 310 in the box body 200 through the air duct 202 and the heat dissipation air duct 312. The cold air cools the battery cells in the battery box 310 and is discharged through the exhaust port 312b on the battery box 310. Then, the cold air enters the air-cooling structure 400 through the return air port 400a of the air-cooling structure 400 for heat exchange. The cooled cold air enters into the box body 200 again to cool the battery cells, and the cycle repeats.

[0083] In this embodiment, the air-cooling structure 400 is an air-cooling air conditioner. This makes it very convenient to circulate and generate cold air. It is understood that in other embodiments, the specific form of the air-cooling structure 400 can be set according to actual needs.

[0084] In this embodiment, as shown in Figures 7 and 8, the battery box 310 includes a housing 314 and a battery module 316 disposed within the housing 314. The number of battery modules 316 is greater than or equal to one. Each battery module 316 includes multiple stacked battery cells. This arrangement of the cells can increase the energy density of the battery box 310. It will be appreciated that in other embodiments, the arrangement of the battery cells within the battery box 310 can be customized based on actual needs.

[0085] In this embodiment, the gap inside the housing 314 and the air inlet 312 a and the air outlet 312 b on the housing 314 constitute the heat dissipation channel 312 .

[0086] In this embodiment, the cell box 310 further includes a fan 318. The fan 318 is located within the housing 314 and is positioned at the exhaust port 312b. The fan 318 allows the airflow within the heat dissipation channel 312 to be quickly discharged through the exhaust port 312b, thereby achieving a better heat dissipation effect. It is understood that in other embodiments, the cell box 310 may not include the fan 318, but instead utilize a fan within the housing 200 to quickly discharge the airflow within the heat dissipation channel 312 through the exhaust port 312b.

[0087] Specifically, in this embodiment, the housing 314 includes a U-shaped bottom frame 314a, a front panel 314b located in front of the bottom frame 314a, a rear panel 314c located in the rear of the bottom frame 314a, and an upper cover 314d located above the bottom frame 314a. Air inlets 312a are provided on both the left and right sides of the bottom frame 314a, and air outlets 312b are located on the front panel 314b.

[0088] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An air-cooled energy storage device, characterized in that: include: A box body having an air inlet; A battery cluster is disposed in the box, the battery cluster includes a battery box, the battery box has an air inlet and an air outlet, the air inlet is connected to the air inlet; and An air cooling structure is provided on the box body, the air cooling structure has an air outlet and an air return port, the air outlet is connected to the air inlet, and the air return port is located on a side of the battery cluster having the air outlet and is connected to the air outlet; The height between the air return port and the end of the battery cluster away from the air inlet is H1, the height of the battery cluster is H2, and H1 and H2 satisfy: 1 / 6≤H1 / H2≤2 / 5.

2. The air-cooled energy storage device according to claim 1, characterized in that: H1 and H2 satisfy: 1 / 5≤H1 / H2≤1 / 3.

3. The air-cooled energy storage device according to claim 1, characterized in that: The side of the battery cluster having the exhaust port is the air outlet side of the battery cluster, the box body has a mounting plate opposite to the air outlet side, in the arrangement direction of the mounting plate and the air outlet side, the distance between the return air port and the air outlet side is L1, the distance between the air outlet side and the mounting plate is L2, and L1 and L2 satisfy: 2 / 5≤L1 / L2≤4 / 5.

4. The air-cooled energy storage device according to claim 1, characterized in that: The air cooling structure includes an air cooling body and a return air duct, the return air duct is connected to the air cooling body, the air outlet is located on the air cooling body, and the return air outlet is located at one end of the return air duct away from the air cooling body.

5. The air-cooled energy storage device according to claim 4, characterized in that: The air-cooling body is an air-cooling air conditioner.

6. The air-cooled energy storage device according to claim 4, characterized in that: The side of the battery cluster having the air outlet is the air outlet side of the battery cluster, the box body has a mounting plate opposite to the air outlet side, and the return air duct is located in the box body and mounted on the mounting plate.

7. The air-cooled energy storage device according to claim 6, characterized in that: The air inlet is located at the upper end or the lower end of the box; The return air duct is in a long strip shape and extends in the up-down direction, and the return air duct is arranged parallel to the air outlet side and at intervals.

8. The air-cooled energy storage device according to claim 6, characterized in that: The air-cooling body has a body return air port, the body return air port is located on a side of the return air duct away from the air outlet side, and the return air duct is connected to the air-cooling body through the body return air port.

9. The air-cooled energy storage device according to claim 8, characterized in that: The main body air return port and the air outlet are both located on a side of the mounting plate close to the air outlet side.

10. The air-cooled energy storage device according to claim 1, characterized in that: The air inlet is located at the upper end or the lower end of the box body.

11. The air-cooled energy storage device according to claim 10, characterized in that: The box body has a cold air channel extending in the up-down direction, and the air inlet is located at the upper end or the lower end of the cold air channel.

12. The air-cooled energy storage device according to claim 11, characterized in that: The side of the battery cluster having the exhaust port is the air outlet side of the battery cluster, the air outlet side is located in the first direction, there are multiple cold air channels, and the multiple cold air channels are arranged at intervals along the second direction, the first direction, the second direction and the up and down directions are perpendicular to each other, there are multiple battery cell boxes, and the multiple battery cell boxes are arranged in an array, and each column of the battery cell boxes is located between two adjacent cold air channels.

13. The air-cooled energy storage device according to claim 12, characterized in that: Both sides of the battery box located in the second direction have the air inlet.

14. The air-cooled energy storage device according to claim 1, characterized in that: It also includes a wind hood and a wind scoop, wherein the wind hood is arranged on one end of the box body having the air inlet and forms an air inlet space between the wind hood and the air inlet, and the wind scoop connects the air outlet and the air inlet space.

15. The air-cooled energy storage device according to claim 14, characterized in that: The end of the wind scoop connected to the air outlet is a first end, and the end of the wind scoop connected to the air inlet space is a second end. The wind passing area of ​​the second end is larger than the wind passing area of ​​the first end.

16. The air-cooled energy storage device according to claim 15, characterized in that: A guide plate is disposed inside the second end so that the second end has a plurality of flow equalization channels.

17. The air-cooled energy storage device according to claim 15, characterized in that: The side of the battery cluster having the exhaust port is the air outlet side of the battery cluster, the air outlet side is located in the first direction, the box body has a cold air channel extending in the up-down direction, the air inlet is located at the upper end or the lower end of the cold air channel, there are multiple cold air channels, and the multiple cold air channels are arranged at intervals along the second direction, the first direction, the second direction and the up-down direction are perpendicular to each other; the first end and the second end are arranged along the first direction.

18. The air-cooled energy storage device according to claim 17, characterized in that: In the second direction, the width of the second end is D1, the width of the whole formed by the plurality of cold air channels is D2, and the ratio of D1 to D2 is 5 / 10-9 / 10.

19. The air-cooled energy storage device according to claim 1, characterized in that: The box body comprises a main frame and an installation frame, wherein both the main frame and the installation frame have an opening side located in the circumferential direction, and the opening side of the main frame and the opening side of the installation frame are sealed and enclosed to form the box body; The battery cluster is located in the main frame, and the side of the battery cluster having the air outlet is the air outlet side of the battery cluster, and the air outlet side faces the installation frame; The air cooling structure is arranged on the installation frame.

20. The air-cooled energy storage device according to claim 19, characterized in that: The air inlet is located on the upper side of the main frame, and the upper side of the mounting frame protrudes beyond the upper side of the main frame; The air-cooled energy storage device further includes an air hood and an air scoop, wherein the air hood is arranged on a portion of the mounting frame protruding from the main frame and is covered on the upper side of the main frame, and the air hood cooperates with the upper side of the main frame to form an air inlet space; The wind scoop is arranged in the installation frame and communicates with the air outlet and the air inlet space.

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