A battery box for railway traction vehicle

Abstract

The present invention relates to a battery box for railway tractors, comprising: a box body having a receiving cavity formed inside thereof, provided with an air inlet and an air outlet connected to the air inlet; a box cover detachably connected to the box body to cover the receiving cavity; a battery module detachably received in the receiving cavity, comprising a plurality of batteries arranged side by side in an integrated structure, and a connector connecting two adjacent batteries; a space between two adjacent batteries to form a first heat dissipation duct connected to the air inlet and the air outlet; and a cooling fan disposed at the air outlet to exhaust hot air from the receiving cavity. The battery box for railway tractors also includes a first heat dissipation state in which the cooling fan extracts heat from the battery module when the temperature of the receiving cavity reaches a set temperature, and a second heat dissipation state in which the battery module cools naturally when the temperature of the receiving cavity is below the set temperature. The battery box has the advantages of high structural strength, good heat dissipation performance, and a long service life.

Description

Technical Field

[0001] The present invention relates to the field of power batteries, and more particularly to a battery box for a railway traction vehicle. Background Art

[0002] Railway tractors, the primary means of transport used in domestic mining and tunnel construction, typically utilize power battery systems as their power source. Battery boxes used in railway tractors in related technologies typically house the batteries in sealed boxes. Under high loads, the heat generated by the batteries is difficult to dissipate promptly, posing a safety hazard. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an improved battery box for a railway traction vehicle.

[0004] The technical solution adopted by the present invention to solve the technical problem is to construct a battery box for railway traction vehicle, comprising:

[0005] The box body has a receiving cavity formed inside and is provided with an air inlet and an air outlet communicated with the air inlet;

[0006] a box cover, detachably connected to the box body to cover the receiving cavity;

[0007] A battery module is detachably received in the receiving cavity, comprising a plurality of batteries arranged side by side in an integrated structure, and a connector connecting two adjacent batteries; a gap is left between the two adjacent batteries to form a first heat dissipation duct connected to the air inlet and the air outlet;

[0008] a cooling fan, disposed at the air outlet to extract hot air from the receiving chamber;

[0009] The battery box for a railway tractor also includes a first heat dissipation state in which the heat of the battery module is extracted by the cooling fan when the temperature of the receiving chamber reaches a set temperature, and a second heat dissipation state in which the battery module is naturally cooled when the temperature of the receiving chamber is lower than the set temperature.

[0010] Preferably, each of the batteries comprises a shell and a battery cell disposed in the shell;

[0011] A plurality of heat dissipation holes are provided on two opposite side walls of the housing; the heat dissipation holes on the two opposite side walls of the housing are connected to each other;

[0012] The plurality of heat dissipation holes of the shell on each of the batteries are arranged opposite to the heat dissipation fan.

[0013] Preferably, a gap is left between the battery module and the inner side wall of the box body, and the gap extends along the air outlet direction to form a second heat dissipation duct.

[0014] Preferably, it also includes a temperature detection device arranged in the box to detect the temperature of the box, and a BMS battery management device connected to the temperature detection device and the cooling fan.

[0015] Preferably, the box body includes two first side panels arranged opposite to each other; the air inlet is arranged on one of the first side panels; and the air outlet is arranged on the other of the first side panels.

[0016] Preferably, the air inlet and / or the air outlet are provided with shutters;

[0017] A first waterproof sealing structure is provided between the shutter and the first side panel.

[0018] Preferably, the box body includes two second side panels arranged opposite to each other; the second side panels are provided with connecting portions that cooperate with the box cover;

[0019] The box cover includes a first cover body covering the receiving cavity; the side edge of the first cover body is bent to form a matching portion to match the connecting portion;

[0020] A second waterproof sealing structure is provided between the first cover and the connecting portion.

[0021] Preferably, it further comprises a fire-fighting device disposed in the box;

[0022] The fire-fighting device is connected to the BMS battery management device;

[0023] The fire-fighting device comprises a fire-fighting pipeline which can automatically fuse when the temperature of the receiving chamber reaches a preset fire-fighting temperature.

[0024] Preferably, it also includes an explosion-proof device and a pressure detection device connected to the BMS battery management device.

[0025] Preferably, the explosion-proof device includes a pressure relief pipeline connecting the box body with the outside world, and a pressure relief valve provided on the pressure relief pipeline and connected to the BMS battery management device to open when the box body pressure reaches a set pressure value.

[0026] The battery box for a railway tractor implemented in the present invention has the following beneficial effects: the battery box for a railway tractor is provided with an air inlet and an air outlet on the box body, and multiple batteries in the battery module are spaced to form a first heat dissipation duct, and a cooling fan is provided at the air outlet. When the temperature in the receiving chamber reaches the set temperature, the cooling fan can extract the heat of the battery module in the receiving chamber through the cooling fan. When the temperature in the receiving chamber is lower than the set temperature, the battery module can be naturally cooled to dissipate heat, thereby quickly dissipating heat under high-load operation, improving the safety performance of the battery box and the service life of the battery, and also playing an energy-saving role. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of a battery box for a railway tractor according to the present invention;

[0029] Figure 2 1 is an exploded schematic diagram of a battery box for a railway tractor according to the present invention;

[0030] Figure 3 yes Figure 2 An exploded schematic diagram of a battery box for a railway traction vehicle is shown;

[0031] Figure 4 yes Figure 3 A partial enlarged view of one end of a battery box for a railway traction vehicle is shown;

[0032] Figure 5 yes Figure 3 A partial enlarged view of the other end of the battery box for a railway traction vehicle;

[0033] Figure 6 It is a cross-sectional view of the cooperation between the box body and the box cover of the battery box for railway traction vehicles of the present invention;

[0034] Figure 7 yes Figure 3 The figure shows a partial enlarged schematic diagram of the body and cover of a battery box for a railway traction vehicle;

[0035] Figure 8 yes Figure 3 The figure shows a partial enlarged schematic diagram of the body and cover of a battery box for a railway traction vehicle at position B;

[0036] Figure 9 yes Figure 2 A schematic diagram showing a battery box for a railway traction vehicle in a first heat dissipation state;

[0037] Figure 10yes Figure 2 The diagram shows the structure of the battery used in the battery box of the railway traction vehicle. DETAILED DESCRIPTION

[0038] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0039] Figure 1 and Figure 2 Some preferred embodiments of the battery box for railway tractors of the present invention are shown. The battery box for railway tractors can be used as a power source for railway tractors and has the advantages of high structural strength, good heat dissipation performance, and long service life.

[0040] like Figures 1 to 8 As shown, the battery box for railway traction may include a box body 10, a box cover 20, a battery module 30, and a cooling fan 40; the box body 10 can be used for loading the battery module 30, and the box cover 20 can be detachably connected to the box body 10, which can cover the box body 10; the cooling fan 40 can be set on the box body 10, and can be used to extract heat from the box body 10.

[0041] Furthermore, in some embodiments, the box 10 can be made of 3 mm thick steel plates welded by bending, flanging, and other processes. The box 10 can be in the shape of a rectangular parallelepiped, with a length of 3.9 meters, a width of 1.35 meters, and a height of 0.9 meters. It is understood that in other embodiments, the box 10 is not limited to being made of 3 mm thick steel plates, and is not limited to being in the shape of a rectangular parallelepiped, with a length of 3.9 meters, a width of 1.35 meters, and a height of 0.9 meters.

[0042] In some embodiments, the housing 10 may include a bottom plate 11, two first side plates 12, and two second side plates 13. The bottom plate 11 may be rectangular, and the two first side plates 12 may be disposed at opposite ends of the bottom plate 11. The two second side plates 13 may be disposed between the two first side plates 12 and connected to the first side plates 12. In some embodiments, the bottom plate 11, the two first side plates 12, and the two second side plates 13 are welded using a full-weld process to meet IP65 protection requirements.

[0043] In some embodiments, a plurality of limiting grooves 111 may be provided on the bottom plate 11 ; the plurality of limiting grooves 111 may be provided along the length direction of the bottom plate 11 , and may be used to limit the battery module 30 .

[0044] In some embodiments, the housing 10 may be provided with an air inlet 124 and an air outlet 121. Specifically, in some embodiments, the air outlet 121 may be provided on one of the two first side panels 12. Optionally, there may be two air outlets 121, which may be spaced laterally along the first side panel 12. A cover 122 may be provided on the first side panel 12. The cover 122 may correspond to the air outlet 121 and be detachably connected to the air outlet 121. The cover 122 may cover the air outlet 121 and prevent dust and moisture from entering the housing 10 through the air outlet 121 when the battery box is not operating. The cover 122 may be connected to the first side panel 12 via screws. In some embodiments, a louver 123 may be provided on the air outlet 121 to prevent dust and moisture from entering the housing 10 through the air outlet 121. The air inlet 124 can be provided on the other first side panel 12 of the two first side panels 12; optionally, the air inlet 124 can be one, which can be connected to the air outlet 121 to facilitate air circulation and remove the heat from the battery module 30. A louver 123 can also be provided on the air inlet 124 to prevent dust and water vapor from entering the box body 10 through the air inlet 124. A first waterproof sealing structure 25 can also be provided between the louver 123 and the first side panel 12. The waterproof sealing structure can be provided corresponding to the air inlet 124 and can be used to seal the gap between the louver 123 and the edge of the air inlet 124 to prevent dust and water vapor from entering. In some embodiments, the waterproof sealing structure can be a waterproof rubber ring. It can be understood that in some other embodiments, the waterproof sealing structure may not be limited to a waterproof rubber ring.

[0045] In some embodiments, an interface 126 can be provided on the first side panel 12, and the interface 126 can be a positive and negative pole output interface and a communication interface; the interface 126 can select a waterproof connector that cooperates with the interface 126 to ensure that the box 10 can achieve IP65 level waterproofness in an environment where there is water leakage above the tunnel and serious water accumulation below, thereby preventing risks such as water leakage, corrosion, and short circuit inside the battery box.

[0046] In some embodiments, the second side panel 13 may also be provided with a maintenance window 131. A maintenance switch 60 may be provided through the window 131. This window 131 facilitates operation of the maintenance switch 60. When repairing the battery box, the main circuit current can be disconnected by unplugging the maintenance switch 60 to ensure personal safety during wiring and maintenance. The maintenance switch 60 also includes a built-in fuse that supports quick replacement. The outer wall of the second side panel 13 may also be provided with a plurality of first lifting rings 132. These first lifting rings 132 may be spaced apart along the length of the second side panel 13 and may be used for lifting the box body 10. In some embodiments, a connecting portion 133 that cooperates with the box cover 20 may be provided on the second side panel 13; the connecting portion 133 may be provided at the top of the second side panel 13, and it may protrude from the second side panel 13, the connecting portion 133 may be provided along the length direction of the second side panel 13, the connecting portion 133 may be plate-shaped, and the top of the connecting portion 133 may be bent toward the outside of the box body 10 to form a flange to cooperate with the box cover 20, thereby improving the stability of the cooperation between the box body 10 and the box cover 20 and improving the overall sealing performance of the battery box.

[0047] In some embodiments, the inner side wall of the second side panel 13 may be provided with a plurality of frames 14 for strengthening the strength of the second side panel 13; the plurality of frames 14 may be arranged at intervals along the length direction of the second side panel 13, and the frames 14 may be arranged perpendicular to the bottom plate 11. Optionally, the frames 14 may be made of square steel 13 with a specification of 80*80 (thickness of 4mm), which may be welded to the second side panel 13. In some embodiments, the first lifting ring 132 may also be directly fully welded to the frames 14. The frames 14 may ensure the structural strength and load-bearing capacity of the entire box 10, which may not only meet the requirements for safe lifting when fully loaded with batteries, but also ensure that the box 10 can withstand the impact force of braking during the operation of the locomotive.

[0048] The interior of the housing 10 is hollow, forming a receiving cavity 15 for accommodating the battery module 30. The inner and outer walls of the housing 10 may be provided with a protective coating. Specifically, in some embodiments, the entire interior and exterior of the housing 10 may be spray-coated to form a protective coating to ensure corrosion resistance in the humid environment of the tunnel.

[0049] The box body 10 may further be provided with a plurality of cross beams; the plurality of cross beams may be arranged side by side and at intervals along the length direction of the box body 10 , and the plurality of cross beams may separate the receiving cavity 15 into a plurality of grids to facilitate the assembly of the battery module 30 .

[0050] In some embodiments, the outer wall of the box body 10 may also be provided with a high-pressure warning sign and a corresponding interface sign to facilitate customer use and operation. The sign may be silk-screened on the outer wall of the first side panel 12 and / or the second side panel 13 of the box body 10.

[0051] Furthermore, in some embodiments, the box cover 20 can cover the receiving cavity 15 and can be in the shape of a rectangular parallelepiped, which can be sleeved around the periphery of the connecting portion 133. The box cover 20 can include a first cover 21 and a second cover 22; the first cover 21 can cover the receiving cavity 15, and the second cover 22 can be detachably mounted on the first cover 21.

[0052] In some embodiments, the first cover 21 may be in the shape of a rectangular plate and may be provided with a maintenance window 211. This maintenance window 211 facilitates maintenance of electrical components within the case 10 without opening the first cover 21. The maintenance window 211 may be located at one end near the first side panel 12. The first cover 21 may also be provided with two sets of second lifting rings 212, which may be spaced apart. Each set of second lifting rings 212 may include multiple second lifting rings 212 spaced apart along the length of the first cover 21. In some embodiments, the side edge of the first cover 21 is bent to form a mating portion that mates with the connecting portion 133. The mating portion may be a flange of the first cover 21 that fits around the outer periphery of the connecting portion 133 to mate with the connecting portion 133, thereby improving the stability of the mating between the case 10 and the cover 20 and enhancing the sealing of the entire battery case. A second waterproof sealing structure 80 can also be set between the first cover body 21 and the connecting part 133. The waterproof sealing structure 80 can be an EPDM sealing waterproof strip, which can be adhered to the top of the first side panel 12 and the second side panel 13. It can be used to seal the first cover body 21 and the connecting part to prevent water leakage.

[0053] In some embodiments, the second cover 22 can be detachably connected to the maintenance window 211 and can be used to cover the maintenance window 211. The first cover 21 can be provided with a frame protruding from the top surface of the first cover 21. The inner side of the frame can form the maintenance window 211. The top edge of the frame can be folded outward to form a flange, and the side edge of the second cover 22 can be bent to form another flange that cooperates with the flange on the frame. A third waterproof sealing structure 90 can also be provided between the second cover 22 and the maintenance window 211. The third waterproof sealing structure 90 can be an EPDM sealing waterproof tape, which can be adhered to the junction of the maintenance window 211 and the second cover 22 to provide waterproofing, thereby ensuring that the battery in the locomotive will not leak when wading through water or being immersed in rain.

[0054] like Figure 2 and Figure 10 As shown, in some embodiments, the battery module 30 can be detachably connected to the housing 10. The battery module 30 can include multiple batteries 31 and a connector 32. The multiple batteries 31 can be arranged side by side and integrated into a single structure, which can be used to power the tractor. The connector 32 can be a hardware component that can be installed on top of two adjacent batteries 31 and connected to the batteries 31 via screws.

[0055] Alternatively, the plurality of batteries 31 may be 28 batteries, which may be divided into two groups. The two groups of batteries may be arranged along the width direction of the housing 10. Each group of batteries may include 14 batteries, and the 14 batteries may be spaced apart along the length direction of the housing 10. The batteries 31 may be arranged in a one-to-one correspondence with the limiting grooves 111 on the bottom plate 11, and the limiting grooves 111 may limit the position of the batteries 31. A gap may be left between two adjacent batteries 31, and the gap may form a first heat dissipation duct 33; the first heat dissipation duct 33 may be connected to the air inlet 124 and the air outlet 121 to facilitate heat dissipation from the batteries 31. In some embodiments, a gap may be left between the battery module 30 and the inner side wall of the housing 10. The gap may extend along the air outlet direction and may be located on both sides of the battery module 30. The gap may form a second heat dissipation duct to facilitate heat dissipation from the battery module 30.

[0056] In some embodiments, the battery 31 may include a shell 311 and a battery cell housed in the shell 311. A plurality of heat dissipation holes 3111 may be provided on both opposite side walls of the shell 311; the heat dissipation holes 3111 on the two opposite side walls of the shell 311 are interconnected to facilitate air circulation. The plurality of heat dissipation holes 3111 may be arranged toward the air outlet 121 and opposite to the heat dissipation fan 40. The heat in the shell 311 may be extracted by the heat dissipation fan 40 through the heat dissipation holes 3111, thereby effectively preventing the battery from overheating during high-power discharge. A third hanging ring 312 may also be provided on the shell 311; the third hanging ring 312 may be fixed to the top of the shell 311, which may facilitate the lifting of the battery 31. Two adjacent batteries 31 may be connected by a connector 32.

[0057] By integrating the multiple batteries 31 into a modular structure, installation is faster and more efficient. During installation, the entire battery module 30 can be lifted and loaded into the housing 10 by simply selecting two or more batteries by their third lifting rings 312. This modular design of the multiple batteries 31 not only facilitates assembly and maintenance of the entire battery module, but also improves production efficiency.

[0058] like Figures 2 to 6 and Figure 9As shown, further, in some embodiments, there can be two cooling fans 40, which can be set in a one-to-one correspondence with the air outlet 121, and can be used to extract the hot air from the receiving chamber 15. The cooling fan 18 can be a temperature-controlled fan, which can automatically start when the temperature in the receiving chamber 15 reaches the set temperature, and the fresh air will be sucked in through the air inlet 124 on the other side, and enter the heat dissipation holes 3111 set on the side of the battery 31 close to the air inlet 124 into the heat dissipation holes 3111 set on the side of the air outlet 121, and pass through the first heat dissipation duct 33 and the second heat dissipation duct to take the heat out of the air outlet 121 and discharge it to the outside of the box 10, thereby cooling the battery module and effectively preventing the battery from overheating during high-power discharge.

[0059] Furthermore, in some embodiments, the battery box for a railway tractor may also include a temperature detection device and a BMS battery management system. The temperature detection device may be disposed in the box 10 and may be used to detect the temperature of the box 10. Alternatively, the temperature detection device may be a temperature sensor. It is understood that in other embodiments, the temperature detection device is not limited to a temperature sensor and may be other conventional temperature detection devices. The temperature detection device may be connected to the BMS battery management system and may provide feedback to the BMS regarding the temperature within the box 10. The BMS battery management system may be connected to the cooling fan 40 and the battery module 30. The cooling fan 40 may be turned on to dissipate heat when the temperature within the box 10 reaches a set temperature, and may be turned off to save energy when the temperature falls below the set temperature. The BMS battery management system may be selected from existing BMS battery management systems.

[0060] In some embodiments, the battery box has two heat dissipation modes, which correspond to a first heat dissipation state and a second heat dissipation state, respectively. When the temperature detection device detects that the temperature in the receiving chamber 15 reaches the set temperature, the first heat dissipation mode is adopted, and the heat dissipation fan 40 is turned on. At this time, the wind can be sucked in from the air inlet 124, pass through the heat dissipation holes 3111 set on the side of the battery 31 near the air inlet 124, enter the heat dissipation holes 3111 set on the side near the air outlet 121, and pass through the first heat dissipation duct 33 and the second heat dissipation duct to take the heat out of the air outlet 121 and discharge it to the outside of the box 10, thereby cooling the battery module and forming a first heat dissipation state. When the temperature detection device detects that the temperature in the receiving chamber 15 is lower than the set temperature, the second heat dissipation mode is adopted, which is a natural cooling heat dissipation mode. At this time, the heat dissipation fan 40 is turned off, and the battery module 30 can dissipate heat through natural cooling, forming a second heat dissipation state. In this mode, the air inlet 124 and the air outlet 121 may also be closed. Of course, it is understandable that in some other embodiments, when the second heat dissipation mode is adopted, the air inlet 124 and the air outlet 121 may also be not closed.

[0061] Furthermore, in some embodiments, the battery box for a railway tractor may further include a high-voltage control device 50; the high-voltage control device 50 may be disposed at one end of the battery module 30 and connected to the battery module 30, and may be located below the maintenance window 211. Specifically, in some embodiments, the high-voltage control device 50 may be detachably connected to the battery 31 disposed at one end via a connector 32 and screws, and may be hoisted together with the battery module 30, thereby facilitating assembly.

[0062] Furthermore, in some embodiments, the battery box for a railway tractor may also include a firefighting device 70; the firefighting device 70 may be disposed within the box 10 and connected to the battery management system (BMS). The firefighting device 70 may utilize a heptafluoropropane (HFC-227ea) automatic fire extinguishing system. Alternatively, the firefighting device 70 may include a firefighting line. When the temperature detection device detects that the gas in the receiving chamber 15 has reached a preset firefighting temperature, the firefighting line, under the control of the BMS, automatically fuses, ejecting HFC-227ea gas to extinguish the fire, thereby protecting the battery modules 30 within the box 10.

[0063] Furthermore, in some embodiments, the battery box for a railway tractor may also include an explosion-proof device and a pressure detection device. Both the explosion-proof device and the pressure detection device may be connected to the BMS battery management system. The pressure detection device may be used to detect the pressure in the box 10 and feed the pressure information back to the BMS battery management system. Alternatively, the pressure detection device may be a pressure sensor. In some embodiments, the explosion-proof device may include a pressure relief line and a pressure relief valve. The pressure relief line may be inserted into the box 10 and used to connect the box 10 to the outside world. The pressure relief valve may be installed on the pressure relief line and located on one of the second side panels 13. The valve is connected to the BMS battery management system. When the pressure detection device detects that the pressure in the box 10 reaches a set pressure value, the pressure relief valve is opened by the BMS battery management system to release the pressure, thereby preventing the box 10 from exploding.

[0064] It is understandable that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A battery box for a railway traction vehicle, characterized in that: include: The box body (10) has a receiving cavity (15) formed inside thereof, and is provided with an air inlet (124) and an air outlet (121) communicating with the air inlet (124); the air inlet (124) and the air outlet (121) are respectively arranged on two first side panels (12) of the box body (10) that are arranged opposite to each other; the box body (10) further comprises a plurality of cross beams, which are arranged side by side and at intervals along the length direction of the box body (10); a box cover (20) detachably connected to the box body (10) to cover the receiving cavity (15); A battery module (30) is detachably accommodated in the accommodating cavity (15), comprising a plurality of batteries (31) arranged side by side in an integrated structure, and a connector (32) connecting the tops of two adjacent batteries (31); a gap is left between the two adjacent batteries (31) to form a first heat dissipation duct (33) communicating with the air inlet (124) and the air outlet (121); a louver (123) is provided on the air inlet (124) and / or the air outlet (121); a first waterproof sealing structure (125) is provided between the louver (123) and the first side plate (12); wherein each battery (31) comprises a shell (311) and a battery cell arranged in the shell (311); a plurality of heat dissipation holes (3111) are opened on two opposite side walls of the shell (311); and the heat dissipation holes (3111) on the two opposite side walls of the shell (311) are communicated with each other; A cooling fan (40) is disposed at the air outlet (121) to extract hot air from the receiving chamber (15); the cooling fan (40) is disposed opposite to the plurality of cooling holes (3111) of the housing (311) on each battery (31); The battery box for a railway tractor also includes a first heat dissipation state in which the heat of the battery module (30) is extracted by the heat dissipation fan (40) when the temperature of the receiving chamber (15) reaches a set temperature, and a second heat dissipation state in which the battery module (30) is naturally cooled when the temperature of the receiving chamber (15) is lower than the set temperature.

2. The battery box for railway traction vehicle according to claim 1, characterized in that: A gap is provided between the battery module (30) and the inner side wall of the box body (10), and the gap is extended along the air outlet direction to form a second heat dissipation duct.

3. The battery box for railway traction vehicle according to claim 1, characterized in that: It also includes a temperature detection device arranged in the box (10) to detect the temperature of the box (10), and a BMS battery management device connected to the temperature detection device and the cooling fan (40).

4. The battery box for railway traction vehicle according to claim 1, characterized in that: The box body (10) comprises two first side panels (12) arranged opposite to each other; the air inlet (124) is arranged on one of the first side panels (12); and the air outlet (121) is arranged on the other of the first side panels (12).

5. The battery box for railway traction vehicle according to claim 1, characterized in that: The box body (10) comprises two second side panels (13) arranged opposite to each other; the second side panels (13) are provided with a connecting portion (133) that cooperates with the box cover (20); The box cover (20) comprises a first cover body (21) covering the receiving cavity (15); the side edge of the first cover body (21) is bent to form a matching portion to match the connecting portion (133); A second waterproof sealing structure (80) is provided between the first cover (21) and the connecting portion (133).

6. The battery box for railway traction vehicle according to claim 3, characterized in that: Also included is a fire-fighting device (70) disposed in the box (10); The fire-fighting device (70) is connected to the BMS battery management device; The fire-fighting device (70) comprises a fire-fighting pipeline that can automatically fuse when the temperature of the receiving chamber (15) reaches a preset fire-fighting temperature.

7. The battery box for railway traction vehicle according to claim 3, characterized in that: It also includes an explosion-proof device and a pressure detection device connected to the BMS battery management device.

8. The battery box for railway traction vehicle according to claim 7, characterized in that: The explosion-proof device comprises a pressure relief pipeline connecting the box (10) to the outside, and a pressure relief valve arranged on the pressure relief pipeline and connected to the BMS battery management device to open when the pressure of the box (10) reaches a set pressure value.

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