Energy storage battery box

Abstract

The utility model relates to battery box heat dissipation technical field discloses a kind of energy storage battery box, comprising: box, ventilation component and flow guide component;Ventilation component includes: air intake mechanism and air outlet mechanism, air intake mechanism is set to the bottom end of box, air outlet mechanism is set to the top end of box;Flow guide component is located below energy storage battery, and it includes: first flow guide cover, two second flow guide covers and third flow guide cover, first flow guide cover is set to the bottom of box, two second flow guide covers are respectively set to the both ends of first flow guide cover, one end of second flow guide cover is connected with first flow guide cover, other end is connected with third flow guide cover, the top end of third flow guide cover is provided with multiple flow guide ports, and multiple flow guide ports are interval setting along the length direction of third flow guide cover, flow guide port is towards the bottom of energy storage battery, the utility model under the guidance of flow guide component will cold air evenly sent to the bottom of energy storage battery, effectively eliminate heat dissipation blind area, improve heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery box heat dissipation technology, specifically to an energy storage battery box. Background Technology

[0002] Energy storage battery boxes are devices used to centrally house, protect, and manage energy storage batteries. They are widely used in photovoltaic energy storage, wind power energy storage, grid peak shaving, electric vehicles, and emergency power supplies. During actual operation, batteries continuously generate a large amount of heat during charging and discharging. If this heat cannot be effectively dissipated in a timely manner, it will not only reduce power generation efficiency but may also lead to cell overheating, performance degradation, and even safety hazards such as thermal runaway. Therefore, improving the heat dissipation efficiency inside energy storage battery boxes is one of the key research directions in this field.

[0003] Existing technology discloses a novel energy storage battery box, which creates a forced ventilation path for airflow from bottom to top by setting air intake holes and installing an exhaust fan at the bottom of the battery box, and simultaneously setting a cooling fan and heat dissipation holes at the top of the box cover. This is used to remove the heat generated by the energy storage battery during operation and improve the heat dissipation effect. However, although the heat dissipation structure inside the battery box can guide the airflow vertically, due to the complex internal structure of the box and the dense arrangement of energy storage batteries, uneven airflow and heat exchange blind spots are prone to occur inside the box. This results in unclear airflow paths within the box, limited heat exchange efficiency, and some areas of the energy storage battery cannot be sufficiently cooled, affecting the heat dissipation efficiency. Utility Model Content

[0004] In view of this, the present invention provides an energy storage battery box to solve the problems of unclear heat dissipation path, chaotic heat dissipation airflow, and low heat dissipation efficiency in existing energy storage battery boxes.

[0005] In a first aspect, this utility model provides an energy storage battery box, comprising:

[0006] The housing is suitable for housing energy storage batteries;

[0007] A ventilation assembly, comprising an air inlet mechanism and an air outlet mechanism, wherein the air inlet mechanism is disposed at the bottom end of the housing and the air outlet mechanism is disposed at the top end of the housing;

[0008] A flow guiding assembly, located below the energy storage battery, includes: a first flow guiding shroud, two second flow guiding shrouds, and a third flow guiding shroud. The first flow guiding shroud is disposed at the bottom of the housing, with an air inlet on its bottom surface facing the air intake mechanism. The two second flow guiding shrouds are respectively disposed at both ends of the first flow guiding shroud, with one end of each second flow guiding shroud connected to the first flow guiding shroud and the other end connected to the third flow guiding shroud. The top of the third flow guiding shroud is provided with multiple flow guiding ports, which are spaced apart along the length of the third flow guiding shroud and face the bottom of the energy storage battery.

[0009] Beneficial effects

[0010] The air inlet at the bottom of the first air deflector faces the air intake mechanism, allowing external cold air to enter the first air deflector in a concentrated and efficient manner. The second air deflector smoothly guides the cold air from both ends of the first air deflector to the third air deflector, preventing uneven diffusion of cold air within the enclosure. The air deflector on the third air deflector can evenly deliver cold air to the bottom of the energy storage battery, effectively eliminating heat exchange blind spots, making the flow direction of cold air within the enclosure clear, greatly improving heat dissipation efficiency, and reducing the risk of localized overheating of the energy storage battery.

[0011] In one optional embodiment, the second flow guide includes: a first flow guide section and a second flow guide section, one end of the first flow guide section is perpendicularly connected to one end of the second flow guide section, the other end of the first flow guide section is connected to the first flow guide, and the other end of the second flow guide section is connected to the third flow guide.

[0012] In one alternative implementation, the first guide section is connected to the second guide section via an arc-shaped guide section.

[0013] Beneficial effects

[0014] The arc-shaped guide section makes the transition of cold air between the first and second guide sections smoother, thereby reducing turbulence and eddy formation at the turning points of the first and second guide sections, reducing flow resistance, and thus improving the efficiency of cold air delivery.

[0015] In one optional embodiment, the housing includes a cover plate and a shell. A plurality of threaded sleeves are provided on the outer wall of the shell near one end of the cover plate. A plurality of bolt pieces are correspondingly provided around the cover plate. Connecting bolts pass through the bolt pieces and are screwed into the threaded sleeves.

[0016] In one optional embodiment, a battery mounting bracket is provided inside the housing, the battery mounting bracket is located above the third air guide, the battery mounting bracket is adapted to place the energy storage battery, and the battery mounting bracket has ventilation holes.

[0017] In one optional embodiment, the air intake mechanism includes: a lower ventilation frame and a plurality of air intake fans, the bottom surface of the housing is provided with a first mounting hole, the lower ventilation frame is disposed at the first mounting hole, and the lower ventilation frame is provided with a plurality of air intake fans.

[0018] In one optional embodiment, the air outlet mechanism includes: an upper ventilation frame and a plurality of exhaust fans, the top surface of the cover plate is provided with a second mounting hole, the upper ventilation frame is disposed at the second mounting hole, and the upper ventilation frame is provided with a plurality of exhaust fans.

[0019] In one optional embodiment, dustproof components are provided at the top of the upper ventilation frame and the bottom of the lower ventilation frame. The dustproof components include a frame and a dustproof net, with the dustproof net disposed on the frame.

[0020] In one optional embodiment, the dustproof net includes a hydrophobic layer and a fine mesh layer, wherein the hydrophobic layer is disposed on the side of the frame away from the box body, and the fine mesh layer is disposed on the side of the frame close to the box body.

[0021] Beneficial effects

[0022] The hydrophobic layer effectively blocks rainwater, fog, and large particles from entering the enclosure, preventing moisture from entering the enclosure and causing corrosion or short circuits to the energy storage battery; the fine mesh layer further filters out tiny dust particles and insects in the cold air, preventing them from adhering to the surface of the energy storage battery and affecting its heat dissipation efficiency.

[0023] In one optional embodiment, sliders are provided on both sides of the frame, and slide rails are provided on both sides of the upper ventilation frame and the lower ventilation frame, with the sliders slidably connected to the slide rails. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is an overall structural diagram of an energy storage battery box according to an embodiment of the present utility model;

[0026] Figure 2 This is an exploded view of the structure of an energy storage battery box according to an embodiment of the present utility model;

[0027] Figure 3 This is a side sectional view of the box body according to an embodiment of the present utility model;

[0028] Figure 4 for Figure 3 Exploded view of the middle casing and airflow guiding components;

[0029] Figure 5 This is a schematic diagram of the flow guiding component according to an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the dustproof component according to an embodiment of the present utility model;

[0031] Figure 7 for Figure 1 A magnified view of part A in the diagram.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Box body; 11. Cover plate; 12. Shell; 13. Threaded sleeve; 14. Bolt plate; 15. Battery mounting bracket;

[0034] 21. Air inlet mechanism; 22. Air outlet mechanism; 221. Upper ventilation rack; 222. Exhaust fan;

[0035] 31. First fairing; 32. Second fairing; 321. First guide section; 322. Second guide section; 323. Arc-shaped guide section; 33. Third fairing; 34. Guide port;

[0036] 4. Dustproof components; 41. Frame; 42. Dustproof net; 43. Slider; 44. Slide rail. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] The following is combined with Figures 1 to 7 The following describes embodiments of the present invention.

[0039] According to an embodiment of the present invention, an energy storage battery box is provided, comprising: a box body 1, a ventilation component, and a flow guiding component. The box body 1 is suitable for placing an energy storage battery. The ventilation component includes: an air inlet mechanism 21 and an air outlet mechanism 22. The air inlet mechanism 21 is disposed at the bottom end of the box body 1, and the air outlet mechanism 22 is disposed at the top end of the box body 1. The flow guiding component is located below the energy storage battery and includes: a first flow guiding shroud 31, two second flow guiding shrouds 32, and a third flow guiding shroud 33. The first flow guiding shroud 31 is disposed at the bottom of the box body 1, and an air inlet is opened on its bottom surface, facing the air inlet mechanism 21. The two second flow guiding shrouds 32 are respectively disposed at both ends of the first flow guiding shroud 31. One end of the second flow guiding shroud 32 is connected to the first flow guiding shroud 31, and the other end is connected to the third flow guiding shroud 33. The top end of the third flow guiding shroud 33 is provided with a plurality of flow guiding ports 34, and the plurality of flow guiding ports 34 are spaced apart along the length direction of the third flow guiding shroud 33, with the flow guiding ports 34 facing the bottom of the energy storage battery.

[0040] Specifically, the housing 1 has a rectangular structure and is made of high-temperature resistant metal. Its internal space houses the air guiding components and the energy storage battery. An air inlet mechanism 21 is installed at the bottom of the housing 1, and an air outlet mechanism 22 is installed at the top. The two are arranged opposite each other to form an air flow channel from bottom to top.

[0041] The first air deflector 31 is a long, narrow shell 12 structure, preferably made of corrosion-resistant aluminum alloy or galvanized steel plate. An air inlet is located on its bottom surface, directly facing the air intake mechanism 21, to allow concentrated cold air to enter the interior of the first air deflector 31. A second air deflector 32 is connected to each end of the first air deflector 31. The second air deflector 32 has a hollow interior structure for conveying cold air. One end of each second air deflector 32 is sealed to the end of the first air deflector 31, and the other end is correspondingly sealed to one edge of the bottom surface of the third air deflector 33. The two sides of the third air deflector 33 are continuous arc surfaces to prevent cold air leakage.

[0042] The top of the third air guide shroud 33 is provided with multiple evenly distributed elongated air guide ports 34. The air guide ports 34 are evenly spaced along the length of the third air guide shroud 33 and the openings face the bottom of the energy storage battery, so that cold air can be evenly delivered to the bottom surface of different energy storage batteries.

[0043] During operation, external cold air is drawn in by the air intake mechanism 21, concentrated and guided by the first air guide shroud 31 to the two second air guide shrouds 32, then flows into the interior of the third air guide shroud 33, and is evenly delivered to the bottom of the energy storage battery through multiple air guide ports 34 to dissipate heat from the energy storage battery. The air guide assembly can effectively prevent the disorderly diffusion of cold air inside the housing 1, reduce heat exchange blind spots, thereby significantly improving the heat dissipation efficiency of the energy storage battery box and reducing the risk of local overheating of the energy storage battery.

[0044] In one embodiment, the second flow guide 32 includes: a first flow guide section 321 and a second flow guide section 322, one end of the first flow guide section 321 is perpendicularly connected to one end of the second flow guide section 322, the other end of the first flow guide section 321 is connected to the first flow guide 31, and the other end of the second flow guide section 322 is connected to the third flow guide 33.

[0045] Specifically, the first guide section 321 and the second guide section 322 are straight hollow channel structures, formed from aluminum alloy or stainless steel plates. One end of the first guide section 321 is welded to the end of the first guide shroud 31, and the other end is perpendicularly welded to one end of the second guide section 322, forming a 90° bend structure.

[0046] The second guide section 322 is matched with the third guide shroud 33. One end of the second guide section 322 is vertically connected to the first guide section 321, and the other end is welded to one side edge of the bottom surface of the third guide shroud 33 to prevent cold air from leaking at the interface.

[0047] In one embodiment, the first guide section 321 is connected to the second guide section 322 via an arc-shaped guide section 323.

[0048] Specifically, the arc-shaped guide section 323 has a smooth arc surface structure and is made of the same material as the first guide section 321 and the second guide section. Its two ends are welded to the first guide section 321 and the second guide section 322, respectively. The bending radius of the arc-shaped guide section 323 is larger than the channel diameter of the first guide section 321 or the second guide section 322, so as to reduce the turbulence and resistance loss of cold air at the arc-shaped guide section 323.

[0049] In one embodiment, the housing 1 includes a cover plate 11 and a housing 12. A plurality of threaded sleeves 13 are provided on one end of the outer wall of the housing 12 near the cover plate 11. A plurality of bolt pieces 14 are provided around the cover plate 11. The connecting bolts pass through the bolt pieces 14 and are screwed into the threaded sleeves 13.

[0050] Specifically, the housing 12 is welded from galvanized steel sheet or aluminum alloy sheet, and multiple threaded sleeves 13 are uniformly welded circumferentially to the outer wall of the housing 12 near the end of the cover plate 11. The cover plate 11 is a flat structure, also made of galvanized steel sheet or aluminum alloy sheet, and multiple bolt pieces 14 are provided around its perimeter according to the position of the threaded sleeves 13 of the housing 12. The bolt pieces 14 are flat plates extending outward, with through holes for inserting connecting bolts. The size and shape of the cover plate 11 match the upper opening of the housing 12, and sealing strips or gaskets can be added at the joint surface to improve sealing performance.

[0051] During assembly, the cover plate 11 is placed over the open end of the housing 12, so that the through holes on the bolt pieces 14 correspond one-to-one with the inner holes of the threaded sleeves 13 of the housing 12. The connecting bolts pass through the bolt pieces 14 in sequence and are screwed into the threaded sleeves 13 to achieve a firm connection between the cover plate 11 and the housing 12.

[0052] In one embodiment, a battery mounting bracket 15 is provided inside the housing 12. The battery mounting bracket 15 is located above the third shroud 33. The battery mounting bracket 15 is suitable for placing an energy storage battery, and the battery mounting bracket 15 has ventilation holes.

[0053] Specifically, the upper platform of the battery mounting bracket 15 is used to place the energy storage battery. The platform has air vents for cold air to pass through. The position of the air vents corresponds to the air vent 34 above the third air duct 33, so that the cold air from the third air duct 33 can pass through the air vents and blow directly to the bottom of the energy storage battery to achieve sufficient heat exchange.

[0054] In one embodiment, the air intake mechanism 21 includes a lower ventilation frame and a plurality of air intake fans. The bottom surface of the housing 12 is provided with a first mounting hole, the lower ventilation frame is disposed at the first mounting hole, and the lower ventilation frame is provided with a plurality of air intake fans.

[0055] Specifically, the bottom surface of the housing 12 is pre-drilled with a first mounting hole that matches the shape of the lower ventilation frame. The lower ventilation frame is a rectangular structure made of corrosion-resistant metal material to ensure structural stability and weather resistance in long-term working environments. The lower ventilation frame is fixed to the position of the first mounting hole by welding, fitting tightly against the bottom surface of the housing 12 to prevent cold air from leaking from the edge of the first mounting hole.

[0056] Multiple intake fans are evenly arrayed inside the lower ventilation frame. The number of intake fans can be determined according to the capacity and heat dissipation requirements of the energy storage battery box, typically ranging from 2 to 6. Each intake fan is fixed to the lower ventilation frame with screws, its blades facing inwards towards the box 1, drawing in external cool air. When the intake fans rotate at high speed, they draw in external cool air through the first mounting hole and deliver it to the airflow guide assembly at the bottom of the box 1, allowing the cool air to be transported along the airflow guide assembly to the bottom of the energy storage battery, forming a stable and directional flow of cool air.

[0057] In one embodiment, the air outlet mechanism 22 includes an upper ventilation frame 221 and a plurality of exhaust fans 222. The top surface of the cover plate 11 is provided with a second mounting hole, the upper ventilation frame 221 is disposed at the second mounting hole, and the upper ventilation frame 221 is provided with a plurality of exhaust fans 222.

[0058] Specifically, the top surface of the cover plate 11 is pre-machined with a second mounting hole that matches the shape of the upper ventilation frame 221. The upper ventilation frame 221 has a long strip structure and is also made of corrosion-resistant metal material. The upper ventilation frame 221 is fixed to the second mounting hole by welding, fitting tightly against the cover plate 11 to prevent cold air from leaking from the edge of the second mounting hole.

[0059] Multiple exhaust fans 222 are installed inside the upper ventilation frame 221 and arranged in an array at intervals along the length of the upper ventilation frame 221. Each exhaust fan 222 is fixed to the upper ventilation frame 221 with screws, and its blades face outwards from the housing 1, enabling it to quickly exhaust hot air from inside the housing 1. The number of exhaust fans 222 is configured according to the capacity and heat dissipation requirements of the energy storage battery box, generally ranging from 2 to 6.

[0060] The air intake mechanism 21 at the bottom of the housing 12 continuously sends external cold air into the housing 1. After the cold air absorbs heat through the energy storage battery, it is discharged from the housing 1 by multiple exhaust fans 222 in the upper ventilation frame 221, realizing an air circulation path from bottom to top, ensuring that the energy storage battery can be maintained within a safe temperature range during long-term operation.

[0061] In one embodiment, dustproof components 4 are provided at the top of the upper ventilation frame 221 and the bottom of the lower ventilation frame. The dustproof components 4 include a frame 41 and a dustproof net 42, with the dustproof net 42 disposed on the frame 41.

[0062] Specifically, frame 41 is used to support and fix dustproof net 42, and stainless steel strips are selected to ensure that frame 41 is not easily deformed or corroded during long-term outdoor use. The external dimensions of frame 41 are matched with upper ventilation frame 221 or lower ventilation frame, and dustproof net 42 is installed on frame 41 to filter dust particles that enter with cold air.

[0063] In one embodiment, sliders 43 are provided on both sides of the frame 41, and slide rails 44 are provided on both sides of the upper ventilation frame 221 and the lower ventilation frame, with sliders 43 slidably connected to slide rails 44.

[0064] Slider 43, which are elongated strips, are provided on both sides of the frame 41 and are connected to the two sides of the frame 41 by U-shaped plates. The slide rail 44 is fixed to the inner wall of the upper ventilation frame 221 or the lower ventilation frame and is adapted to the shape of the slider 43.

[0065] During installation, the slider 43 of the dustproof component 4 is inserted along the slide rail 44, so that the frame 41 fits tightly against the mounting surface of the ventilation rack. When it is necessary to clean or replace the dustproof net 42, simply pull out the dustproof component 4 along the slide rail 44.

[0066] In one embodiment, the dustproof net 42 includes a hydrophobic layer and a fine mesh layer. The hydrophobic layer is disposed on the side of the frame 41 away from the housing 1, and the fine mesh layer is disposed on the side of the frame 41 close to the housing 1.

[0067] Specifically, the dustproof net 42 is composed of a hydrophobic layer and a fine mesh layer, forming a double-layer protective structure. The main function of the hydrophobic layer is to prevent rainwater, fog, liquid water, and large particles from entering the housing 1. The hydrophobic layer is made of polytetrafluoroethylene (PTFE) fiber mesh, which has a low surface energy, allowing water droplets to roll off upon contact, preventing them from penetrating into the interior of the housing 1.

[0068] The fine mesh layer is mainly used to filter tiny dust particles and insects in cold air. It is made of stainless steel ultrafine woven wire mesh, with mesh diameters controlled between 0.1 and 0.3 mm, to effectively intercept fine dust while ensuring airflow.

[0069] Working principle: External cold air enters the housing 1 through the lower ventilation frame under the action of the intake fan, and is filtered by the dustproof component 4 to remove moisture and dust before entering the airflow guiding assembly. The cold air passes sequentially through the first airflow guide shroud 31, two second airflow guide shrouds 32 and the third airflow guide shroud 33, and is evenly delivered to the bottom of the energy storage battery under the action of multiple airflow guide ports 34, where it directly exchanges heat with the energy storage battery and carries away the heat generated by the energy storage battery. The heated air flows upward and is discharged from the housing 1 through the exhaust fan 222 in the upper ventilation frame 221.

[0070] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An energy storage battery pack, characterized by, include: A housing (1), the housing (1) being adapted to house an energy storage battery; The ventilation assembly includes an air inlet mechanism (21) and an air outlet mechanism (22), wherein the air inlet mechanism (21) is disposed at the bottom end of the housing (1) and the air outlet mechanism (22) is disposed at the top end of the housing (1); A flow guiding assembly is located below the energy storage battery and includes: a first flow guiding cover (31), two second flow guiding covers (32) and a third flow guiding cover (33). The first flow guiding cover (31) is located at the bottom of the housing (1) and has an air inlet on its bottom surface facing the air inlet mechanism (21). The two second flow guiding covers (32) are respectively located at both ends of the first flow guiding cover (31). One end of the second flow guiding cover (32) is connected to the first flow guiding cover (31) and the other end is connected to the third flow guiding cover (33). The top of the third flow guiding cover (33) is provided with a plurality of flow guiding ports (34), and the plurality of flow guiding ports (34) are spaced apart along the length direction of the third flow guiding cover (33). The flow guiding ports (34) face the bottom of the energy storage battery.

2. The energy storage battery pack of claim 1, wherein, The second flow guide (32) includes: a first flow guide section (321) and a second flow guide section (322), one end of the first flow guide section (321) is perpendicularly connected to one end of the second flow guide section (322), the other end of the first flow guide section (321) is connected to the first flow guide (31), and the other end of the second flow guide section (322) is connected to the third flow guide (33).

3. The energy storage battery pack of claim 2, wherein, The first guide section (321) is connected to the second guide section (322) through the arc-shaped guide section (323).

4. The energy storage battery pack of claim 1, wherein, The housing (1) includes a cover plate (11) and a shell (12). The outer wall of the shell (12) is provided with a plurality of threaded sleeves (13) near the end of the cover plate (11). A plurality of bolt pieces (14) are provided around the cover plate (11). The connecting bolts pass through the bolt pieces (14) and are screwed to the threaded sleeves (13).

5. The energy storage battery pack of claim 4, wherein, A battery mounting bracket (15) is provided inside the housing (12). The battery mounting bracket (15) is located above the third air guide (33). The battery mounting bracket (15) is suitable for placing the energy storage battery, and the battery mounting bracket (15) has ventilation holes.

6. The energy storage battery pack of claim 4, wherein, The air intake mechanism (21) includes a lower ventilation frame and multiple air intake fans. The bottom surface of the housing (12) is provided with a first mounting hole. The lower ventilation frame is located at the first mounting hole, and multiple air intake fans are provided in the lower ventilation frame.

7. The energy storage battery pack of claim 6, wherein, The air outlet mechanism (22) includes an upper ventilation frame (221) and a plurality of exhaust fans (222). The top surface of the cover plate (11) is provided with a second mounting hole. The upper ventilation frame (221) is located at the second mounting hole, and the upper ventilation frame (221) is provided with a plurality of exhaust fans (222).

8. The energy storage battery pack of claim 7, wherein, Dustproof components (4) are provided at the top of the upper ventilation frame (221) and the bottom of the lower ventilation frame. The dustproof components (4) include a frame (41) and a dustproof net (42), and the dustproof net (42) is provided on the frame (41).

9. The energy storage battery pack of claim 8, wherein, The dustproof net (42) includes a hydrophobic layer and a fine mesh layer. The hydrophobic layer is disposed on the side of the frame (41) away from the box (1), and the fine mesh layer is disposed on the side of the frame (41) close to the box (1).

10. The energy storage battery pack of claim 8, wherein, The frame (41) is provided with sliders (43) on both sides, and the upper ventilation frame (221) and the lower ventilation frame are provided with slide rails (44) on both sides. The sliders (43) are slidably connected to the slide rails (44).

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