Walk-in constant temperature and humidity test device and test method

Abstract

The invention discloses a walk-in type constant temperature and humidity test device and a test method, and particularly relates to the field of walk-in type test boxs.The test device comprises a test box, a box door is installed on the front side of the test box, supporting mechanisms are installed on the two sides in the test box, each supporting mechanism comprises a support, and a guide rod is vertically installed on each support; the guide rod is sleeved with a plurality of sliding seats, one side of each sliding seat is rotationally connected with a rotating shaft, a supporting plate is fixedly installed on each rotating shaft, and the supporting mechanism further comprises a rotary driving component and a linear driving component. When the battery packs are on fire, all the battery packs fall to the bottom of the test box, so that the space between the battery pack at the lowest layer and the bottom of the test box and the space between the battery packs disappear, and no invalid space exists, that is, when water is filled into the test box, the battery packs can be in direct contact with the battery packs; the time for submerging the battery pack is shortened, and the purpose of extinguishing fire in a short time is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of walk-in test chambers, and more specifically, to a walk-in constant temperature and humidity test device and a test method. Background Art

[0002] Walk-in constant temperature and humidity test device, also known as walk-in constant temperature and humidity test chamber, is a device used to simulate extreme environmental conditions. It is mainly composed of a heating system, a humidification system, a refrigeration system, and a ventilation system. It is suitable for low temperature, high temperature, high and low temperature changes, constant time heat, high and low temperature alternating humidity and heat tests of complete machines or large components. It is widely used in military, aviation, electronics, automobiles, chemicals, medical and other fields.

[0003] The working environment of the battery pack of new energy vehicles is relatively complex, and the working temperature is generally around -30℃-60℃. Therefore, in order to ensure the safety of new energy battery packs during use, a walk-in constant temperature and humidity test device is required in production design to conduct constant temperature and humidity tests on the battery packs.

[0004] At present, during the test, the battery pack is placed on the frame and then pushed into a walk-in constant temperature and humidity test chamber for testing. During the battery pack test, fire is inevitable. Once the fire is large, it is difficult to extinguish the fire. In the prior art, water flooding is used to extinguish the fire. That is, when a fire occurs, water is quickly pumped into the test chamber so that the water submerges the battery pack to achieve the purpose of extinguishing the fire.

[0005] However, because the battery pack was placed on the frame during the test, there is a certain height difference between the battery pack and the bottom of the test box, and there is also a height difference between the upper battery pack and the lower battery pack. When flooding the fire, the water must fill the space between the lowest battery pack and the bottom of the test box before the water can contact the lowest battery pack, and the water must fill the space between the battery packs before it can contact the upper battery pack. These spaces are called invalid spaces. Due to the large invalid space, when flooding the fire, the water needs to be poured for a long time to achieve the purpose of extinguishing the fire. During this period, safety accidents are prone to occur. Summary of the invention

[0006] The present invention provides a walk-in constant temperature and humidity test device and a test method, and aims to solve the problem that when the existing walk-in constant temperature and humidity test device is used to test new energy battery packs, due to the large ineffective space, water needs to be poured in for a long time to achieve the purpose of fire extinguishing when flooding with water.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a walk-in constant temperature and humidity test device, comprising a test box, a box door is installed on the front side of the test box, and support mechanisms are installed on both sides of the inside of the test box, the support mechanism comprises a bracket, a guide rod is vertically installed on the bracket, a plurality of sliding seats are sleeved on the guide rod, one side of the sliding seat is rotatably connected to a rotating shaft, and a support plate is fixedly installed on the rotating shaft, the support mechanism also includes a rotary drive component and a linear drive component, the linear drive component is used to drive the sliding seat to move vertically, and the rotary drive component is used to drive the rotating shaft and the support plate to rotate, and each of the opposing support plates on the two support mechanisms can jointly support a battery pack; The test box is provided with a water inlet which is connected to a water supply component. A sensor is also installed in the test box for monitoring whether a fire occurs in the test box. When a fire occurs in the test box, the rotating drive component drives the support plate to rotate downward, causing the battery pack to slide from the support plate to the bottom of the test box, and the water supply component pours water into the test box to submerge the battery pack.

[0008] In a preferred embodiment, the rotating drive component includes a worm wheel and a worm, which are both rotatably connected to the sliding seat, and the worm wheel and the worm are meshed with each other. A drive rod is vertically rotatably connected to the bracket, and the worm sliding sleeve is arranged on the drive rod. A motor 1 is installed on the bracket, and the motor 1 is used to drive the drive rod to rotate.

[0009] In a preferred embodiment, the linear drive component includes a screw rod vertically rotatably mounted on a bracket, wherein a sliding seat is threadedly connected to the screw rod, and a second motor is mounted on the bracket, and the second motor is used to drive the screw rod to rotate.

[0010] In a preferred embodiment, one side of all the sliding seats above the lowest sliding seat is rotatably connected to a long rod, the lowest sliding seat is hinged with a lower short rod, the upper end of the lower short rod is hinged to the lower end of the long rod on the adjacent sliding seat, the upper end of the bracket is hinged with an upper short rod, the lower end of the upper short rod is hinged to the upper end of the long rod on the adjacent sliding seat.

[0011] In a preferred embodiment, a water retaining mechanism is provided on one side of the test box near the box door, and the water retaining mechanism includes a water retaining plate vertically slidably installed on the inner side of the test box, the end of the water retaining plate is fixedly connected to the limiting block, the side wall of the test box is fixedly connected to the fixed block, a rocker rod is rotatably connected to the fixed block through an elastic component, the upper end of the rocker rod is fixedly connected to a swing arm, the end of the swing arm is fixedly connected to a limiting shaft, the limiting shaft is supported on the bottom of the limiting block, and the end of the rotating shaft located at the bottom is fixedly connected to a cam. When the support plate rotates downward, the cam pushes the bottom of the rocker rod to disengage the limiting shaft from the limiting block, thereby causing the water retaining plate to fall.

[0012] In a preferred embodiment, an extension plate is vertically slidably arranged inside the water baffle, a protrusion is fixedly connected to one side of the upper end of the extension plate, a support block is fixedly connected to the inner wall of the test box, and after the water baffle falls, the support block is used to support the protrusion.

[0013] In a preferred embodiment, a control box is provided on one side of the test box, and an environmental control unit is provided in the control box. The environmental control unit includes a heating system, a humidification system, a refrigeration system, and a ventilation system. The heating system, the humidification system, and the refrigeration system are connected to the interior of the test box through the ventilation system, so as to adjust the temperature and humidity inside the test box.

[0014] In a preferred embodiment, the walk-in constant temperature and humidity test device also includes an air duct switching mechanism, which includes air duct one and air duct two. Air duct one has air outlet one on one side, and air duct two has air outlet two on one side. Switching tube one is movably inserted into the interior of air duct one, and a protruding column is fixedly connected to the end of switching tube one close to air duct two, and air holes are arranged around the protruding column. Switching tube two is movably inserted into the interior of air duct two, and a through opening is provided at the end of switching tube two close to air duct one. An end of air duct one away from air duct two is connected to the interior of the test box, and an end of air duct two away from air duct one is connected to the interior of the test box through a ventilation system.

[0015] In a preferred embodiment, the air duct switching mechanism also includes a switching component, which includes a transmission shaft, which is fixedly connected to the upper end of the upper short rod, and one end of the transmission shaft is connected to a spur gear through a bevel gear set, and the upper and lower sides of the spur gear are respectively meshed with rack 1 and rack 2, and rack 1 and rack 2 are respectively fixedly connected to switching tube 2 and switching tube 1.

[0016] The present invention also provides a test method of a walk-in constant temperature and humidity test device, using the above-mentioned walk-in constant temperature and humidity test device, characterized in that it includes the following steps: Step 1: During the test, open the box door, place the battery pack on the support plate, and then close the box door to conduct the test; Step 2: When the sensor detects that the battery pack in the test box is on fire, the rotary drive component drives the support plate to rotate downward, so that the battery pack slides from the support plate to the bottom of the test box; Step 3: The water supply component pours water into the test box to submerge the battery pack to extinguish the fire.

[0017] Technical effects and advantages of the present invention: When a battery pack catches fire, the present invention causes all battery packs to fall to the bottom of the test box, thereby eliminating the space between the lowest battery pack and the bottom of the test box and the space between the battery packs, and eliminating the need for invalid space. In other words, when water is poured into the test box, it can directly contact the battery packs, shortening the time it takes for water to submerge the battery packs, thereby achieving the purpose of extinguishing the fire in a shorter time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of two supporting mechanisms supporting a battery pack according to the present invention.

[0021] Figure 4 The structural diagram of the support mechanism of the present invention is shown in FIG. Figure 1 .

[0022] Figure 5 The structural diagram of the support mechanism of the present invention is shown in FIG. Figure 2 .

[0023] Figure 6 It is a cross-sectional view of the support mechanism of the present invention.

[0024] Figure 7 Schematic diagram of the installation of the water retaining mechanism of the present invention Figure 1 .

[0025] Figure 8 Schematic diagram of the installation of the water retaining mechanism of the present invention Figure 2 .

[0026] Fig. 9 This is a schematic diagram of the installation of the air duct switching mechanism of the present invention.

[0027] Fig.10 It is a structural schematic diagram of the air duct switching mechanism of the present invention.

[0028] Fig.11 The present invention is a flow chart of the test method.

[0029] The accompanying drawings are marked as follows: 1, test box; 11, box door; 2, support mechanism; 21, bracket; 22, guide rod; 23, sliding seat; 24, rotating shaft; 25, support plate; 26, rotating drive component; 261, worm gear; 262, worm; 263, driving rod; 264, motor 1; 27, linear drive component; 271, screw rod; 272, motor 2; 273, long rod; 274, upper short rod; 275, lower short rod; 3, water retaining mechanism; 31, water retaining plate; 311, limit block; 32, fixing block; 3 3. Rocker arm; 34. Rocker arm; 35. Limiting shaft; 36. Cam; 37. Extension plate; 371. Boss; 38. Support block; 4. Air duct switching mechanism; 41. Air duct one; 411. Air outlet one; 42. Air duct two; 421. Air outlet two; 43. Switching tube one; 431. Boss; 432. Air hole; 44. Switching tube two; 441. Through port; 45. Switching component; 451. Transmission shaft; 452. Bevel gear set; 453. Spur gear; 454. Rack one; 455. Rack two; 5. Battery pack. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Refer to the instruction manual Figure 1-Figure 10 A walk-in constant temperature and humidity test device includes a test box 1, a box door 11 is installed on the front side of the test box 1, and support mechanisms 2 are installed on both sides of the inside of the test box 1. The support mechanism 2 includes a bracket 21, a guide rod 22 is vertically installed on the bracket 21, and a plurality of sliding seats 23 are sleeved on the guide rod 22. One side of the sliding seat 23 is rotatably connected to a rotating shaft 24, and a support plate 25 is fixedly installed on the rotating shaft 24. The support mechanism 2 also includes a rotary drive component 26 and a linear drive component 27. The linear drive component 27 is used to drive the sliding seat 23 to move vertically, and the rotary drive component 26 is used to drive the sliding seat 23 to move vertically. The rotation driving component 26 is used to drive the rotating shaft 24 and the support plate 25 to rotate. Each relative support plate 25 on the two support mechanisms 2 can jointly support a battery pack 5. A water inlet is provided on the test box 1, and the water inlet is connected to the water supply component. A sensor is also installed in the test box 1. The sensor is used to monitor whether there is a fire in the test box 1. When a fire occurs in the test box 1, the rotation driving component 26 drives the support plate 25 to rotate downward, so that the battery pack 5 slides from the support plate 25 to the bottom of the test box 1, and the water supply component pours water into the test box 1 to submerge the battery pack 5.

[0032] In the above technical solution, if Figure 4-Figure 6As shown, the rotating driving component 26 includes a worm wheel 261 and a worm 262, and the worm wheel 261 and the worm 262 are both rotatably connected to the sliding seat 23, and the worm wheel 261 and the worm 262 are meshed with each other. A driving rod 263 is vertically rotatably connected to the bracket 21, and the worm 262 is slidably sleeved on the driving rod 263. A motor 264 is installed on the bracket 21, and the motor 264 is used to drive the driving rod 263 to rotate.

[0033] It should be noted that the motor 1 264 drives the driving rod 263 to rotate, the driving rod 263 drives the worm 262 to rotate, the worm 262 drives the worm wheel 261 to rotate, and the worm wheel 261 can drive the rotating shaft 24 and the supporting plate 25 to rotate.

[0034] In the above technical solution, if Figure 4-Figure 6 As shown, the linear drive component 27 includes a screw rod 271 vertically rotatably mounted on the bracket 21, wherein one of the sliding seats 23 is threadedly connected to the screw rod 271, and a second motor 272 is mounted on the bracket 21, and the second motor 272 is used to drive the screw rod 271 to rotate.

[0035] Furthermore, one side of all the sliding seats 23 above the lowest sliding seat 23 is rotatably connected to a long rod 273, the lowest sliding seat 23 is hinged with a lower short rod 275, the upper end of the lower short rod 275 is hinged to the lower end of the long rod 273 on the adjacent sliding seat 23, and the upper end of the bracket 21 is hinged with an upper short rod 274, the lower end of the upper short rod 274 is hinged to the upper end of the long rod 273 on the adjacent sliding seat 23.

[0036] It should be noted that the motor 272 drives the screw rod 271 to rotate, and the screw rod 271 drives the sliding seat 23 threadedly connected thereto to move, for example, drives the lowest sliding seat 23 to move downward. At this time, all the sliding seats 23 can be moved downward through the lower short rod 275, the long rod 273 and the upper short rod 274, and during the movement, the distance between adjacent sliding seats 23 will increase.

[0037] In the above technical solution, the water supply component adopts a water pump, which pumps the water in the water tank into the interior of the test box 1. The sensor can adopt a smoke sensor, which determines that the battery pack 5 is on fire when smoke is detected, or a temperature sensor is used, which determines that the battery pack 5 is on fire when a high temperature is detected.

[0038] In this embodiment, the specific implementation method is: during the test, open the box door 11, such as Figure 2 and Figure 3As shown, the battery pack 5 is placed on the support plate 25, and then the box door 11 is closed for testing. During the test, when the sensor detects that the battery pack 5 in the test box 1 is on fire, the linear drive component 27 first drives the sliding seat 23 to move downward, and the rotating shaft 24 and the support plate 25 move downward accordingly, that is, the battery pack 5 placed on the support plate 25 also moves downward, and at the same time, the distance between adjacent sliding seats 23 also increases, and then the support plate 25 is driven to swing downward by the rotating drive component 26, so that the battery pack 5 is separated from the support plate 25 and falls to the bottom of the test box 1. At the same time, the water supply component pours water into the interior of the test box 1, so that the water submerges the battery pack 5 to extinguish the fire.

[0039] In the above technical solution, through the setting of the support mechanism 2, multiple battery packs 5 can be supported for testing. When the battery pack 5 catches fire, on the one hand, the rotary drive component 26 can drive the support plate 25 to swing downward, so that the battery pack 5 falls to the bottom of the test box 1. On the other hand, the linear drive component 27 can drive the sliding seat 23 to move downward and increase the distance between adjacent sliding seats 23. The purpose is to make the battery pack 5 closer to the bottom of the test box 1, reduce the impact caused by the battery pack 5 falling, and prevent the support plate 25 from hitting the lower battery pack 5 when swinging downward to cause jamming. The above technical solution makes all the battery packs 5 fall to the bottom of the test box 1 when the battery pack 5 catches fire, so that the space between the lowest battery pack 5 and the bottom of the test box 1 and the space between the battery packs 5 will disappear, and there will be no invalid space. That is to say, when water is poured into the interior of the test box 1, it can directly contact the battery pack 5, shortening the time for water to submerge the battery pack 5, and achieving the purpose of extinguishing the fire in a shorter time.

[0040] Refer to the instruction manual Figure 2 , Figure 7-Figure 8 A water retaining mechanism 3 is provided on one side of the test box 1 near the box door 11. The water retaining mechanism 3 includes a water retaining plate 31 vertically slidably installed on the inner side of the test box 1. The end of the water retaining plate 31 is fixedly connected to the limiting block 311. The side wall of the test box 1 is fixedly connected to a fixed block 32. The fixed block 32 is rotatably connected to a swing rod 33 through an elastic component. The upper end of the swing rod 33 is fixedly connected to a swing arm 34. The end of the swing arm 34 is fixedly connected to a limiting shaft 35. The limiting shaft 35 is supported on the bottom of the limiting block 311. The end of the rotating shaft 24 located at the bottom is fixedly connected to a cam 36. When the support plate 25 rotates downward, the cam 36 pushes the bottom of the swing rod 33 to disengage the limiting shaft 35 from the limiting block 311, thereby causing the water retaining plate 31 to fall.

[0041] It should be noted that, under normal conditions, the end of the limit shaft 35 is supported on the lower side of the limit block 311, so that the water baffle 31 is maintained at the top of the inner side of the test box 1 near the door 11. When the rotating shaft 24 and the support plate 25 rotate to make the battery pack 5 fall, the rotating shaft 24 will drive the cam 36 to rotate, so that the cam 36 pushes the bottom of the swing rod 33, so that the swing rod 33 swings, and the swing rod 33 drives the swing arm 34 and the limit shaft 35 to swing downward, so that the end of the limit shaft 35 is separated from the end of the limit block 311. In this way, the water baffle 31 loses the support of the limit shaft 35, and falls due to gravity, and is blocked at the position of the door 11. The purpose is to enable the water baffle 31 to block the water inside the test box 1 when the door 11 is opened after the water flooding fire is completed, so as to prevent the water from rushing out quickly from the opened door 11. Among them, the elastic component is a torsion spring, which is used to swing the swing rod 33 so that the swing arm 34 swings upward to reset.

[0042] It should be noted that after the battery pack 5 is burned, many large and small parts of impurities are generated. Therefore, it is not suitable to directly pump them out with a water pump. It is better to open the box door 11 and then deal with them.

[0043] Furthermore, an extension plate 37 is vertically slidably provided inside the water baffle 31, a protrusion 371 is fixedly connected to one side of the upper end of the extension plate 37, and a support block 38 is fixedly connected to the inner wall of the test box 1. After the water baffle 31 falls, the support block 38 is used to support the protrusion 371.

[0044] It should be noted that when the water baffle 31 falls downward, the extension plate 37 also falls downward. When the water baffle 31 does not contact the bottom of the test box 1, the protrusion 371 first contacts the support block 38. The support block 38 limits the position of the protrusion 371, so that the extension plate 37 cannot fall further, while the water baffle 31 can continue to fall. At this time, the extension plate 37 extends out from the water baffle 31. When the water baffle 31 falls to the bottom of the test box 1, the water baffle 31 and the extension plate 37 play a role in blocking water together, and the extension plate 37 can increase the height of the water barrier.

[0045] Refer to the instruction manual Figure 1 A control box is provided on one side of the test box 1, and an environment control unit is provided in the control box. The environment control unit includes a heating system, a humidification system, a refrigeration system, and a ventilation system. The heating system, the humidification system, and the refrigeration system are connected to the interior of the test box 1 through the ventilation system, so as to adjust the temperature and humidity inside the test box 1.

[0046] Furthermore, the walk-in constant temperature and humidity test device also includes an air duct switching mechanism 4, which includes an air duct 1 41 and an air duct 2 42. One side of the air duct 1 41 has an air outlet 1 411, and one side of the air duct 2 42 has an air outlet 2 421. The air duct 1 41 is internally movably connected with a switching tube 1 43, and one end of the switching tube 1 43 close to the air duct 2 42 is fixedly connected with a boss 431, and the boss 431 is surrounded by air holes 432. The air duct 2 42 is internally movably connected with a switching tube 2 44, and one end of the switching tube 2 44 close to the air duct 1 41 has a through opening 441. The end of the air duct 1 41 away from the air duct 2 42 is connected to the interior of the test box 1, and the end of the air duct 2 42 away from the air duct 1 41 is connected to the interior of the test box 1 through the ventilation system.

[0047] Furthermore, the air duct switching mechanism 4 also includes a switching component 45, which includes a transmission shaft 451, which is fixedly connected to the upper end of the upper short rod 274, and one end of the transmission shaft 451 is connected to a spur gear 453 through a bevel gear set 452. The upper and lower sides of the spur gear 453 are respectively meshed with a rack 1 454 and a rack 2 455, and the rack 1 454 and the rack 2 455 are respectively fixedly connected to the switching tube 2 44 and the switching tube 1 43.

[0048] In the above technical solution, the bevel gear set 452 is composed of two bevel gears, one of which is mounted on the transmission shaft 451, and the other is connected to the spur gear 453 through a shaft transmission.

[0049] It should be noted that the environmental control unit controls the test environment in the test chamber 1 through a heating system, a humidification system, a cooling system, and a ventilation system. Specifically, the heating system, the humidification system, and the cooling system are used for heating, humidifying, and cooling the air, respectively, and the ventilation system delivers air of the required temperature and humidity into the interior of the test chamber 1 to form a circulation.

[0050] like Fig.10As shown, this is the state when there is no fire. In this state, air duct 1 41 is connected to air duct 2 42 through switching tube 1 43, air hole 432, port 441, switching tube 2 44, and switching tube 1 43 closes air outlet 1 411, and switching tube 2 44 closes air outlet 2 421. The ventilation system sends air from test box 1, air duct 1 41, switching tube 1 43, switching tube 2 44 and air duct 2 42 into the interior of test box 1 to form a cycle. When a fire occurs, since the sliding seat 23 needs to move downward, the upper short rod 274 will swing, and the upper end of the upper short rod 274 drives the transmission shaft 451 to rotate, and the transmission shaft 451 drives the spur gear 453 to rotate through the bevel gear set 452, and the spur gear 453 drives the rack 1 454 and the rack 2 455 to move, and the rack 1 454 and the rack 2 455 respectively drive the switching tube 2 44 and the switching tube 1 43 to approach each other, so that the protruding column 431 is inserted into the inside of the through hole 441, thereby closing the switching tube 1 43 and the switching tube 2 44, and the switching tube 1 43 opens the air outlet 1 411, and the switching tube 2 44 opens the air outlet 2 421, so that the external air can enter the interior of the test box 1 through the air outlet 2 421 and the air duct 2 42 ventilation system, and the air inside the test box 1 is discharged from the air duct 1 41 and the air outlet 1 411. The purpose is to ventilate and reduce the pressure inside the test box 1 due to the increase in temperature.

[0051] Refer to the instruction manual Fig.11 This embodiment also provides a test method for a walk-in constant temperature and humidity test device, using the above-mentioned walk-in constant temperature and humidity test device, including the following steps: Step 1: During the test, open the box door 11, place the battery pack 5 on the support plate 25, and then close the box door 11 to conduct the test; Step 2: When the sensor detects that the battery pack 5 in the test box 1 is on fire, the rotation drive component 26 drives the support plate 25 to rotate downward, so that the battery pack 5 slides from the support plate 25 to the bottom of the test box 1; Step 3: The water supply component pours water into the test box 1 so that the water submerges the battery pack 5 to extinguish the fire.

[0052] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A walk-in constant temperature and humidity test device, characterized in that: The test box (1) comprises a test box (1), wherein a box door (11) is installed on the front side of the test box (1), and support mechanisms (2) are installed on both sides of the inside of the test box (1), wherein the support mechanism (2) comprises a bracket (21), wherein a guide rod (22) is vertically installed on the bracket (21), wherein a plurality of sliding seats (23) are sleeved on the guide rod (22), wherein one side of the sliding seat (23) is rotatably connected to a rotating shaft (24), wherein a support plate (25) is fixedly installed on the rotating shaft (24), wherein the support mechanism (2) further comprises a rotation drive component (26) and a linear drive component (27), wherein the linear drive component (27) is used to drive the sliding seat (23) to move vertically, and the rotation drive component (26) is used to drive the rotating shaft (24) and the support plate (25) to rotate, and each of the opposing support plates (25) on the two support mechanisms (2) can jointly support a battery pack (5); The test box (1) is provided with a water inlet connected to a water supply component. A sensor is also installed in the test box (1) for monitoring whether a fire occurs in the test box (1). When a fire occurs in the test box (1), the rotary drive component (26) drives the support plate (25) to rotate downward, causing the battery pack (5) to slide from the support plate (25) to the bottom of the test box (1), and the water supply component pours water into the test box (1) so that the water submerges the battery pack (5).

2. A walk-in constant temperature and humidity test device according to claim 1, characterized in that: The rotary drive component (26) comprises a worm wheel (261) and a worm (262), the worm wheel (261) and the worm (262) being rotatably connected to the sliding seat (23), and the worm wheel (261) and the worm (262) being meshed with each other, a driving rod (263) being vertically rotatably connected to the bracket (21), the worm (262) being slidably sleeved on the driving rod (263), and a motor 1 (264) being mounted on the bracket (21), the motor 1 (264) being used to drive the driving rod (263) to rotate.

3. A walk-in constant temperature and humidity test device according to claim 2, characterized in that: The linear drive component (27) comprises a screw rod (271) mounted vertically and rotatably on a bracket (21), wherein a sliding seat (23) is threadedly connected to the screw rod (271), and a second motor (272) is mounted on the bracket (21), and the second motor (272) is used to drive the screw rod (271) to rotate.

4. A walk-in constant temperature and humidity test device according to claim 3, characterized in that: One side of all the sliding seats (23) above the lowest sliding seat (23) is rotatably connected to a long rod (273); the lowest sliding seat (23) is hingedly connected to a lower short rod (275); the upper end of the lower short rod (275) is hingedly connected to the lower end of the long rod (273) on the adjacent sliding seat (23); the upper end of the bracket (21) is hingedly connected to an upper short rod (274); the lower end of the upper short rod (274) is hingedly connected to the upper end of the long rod (273) on the adjacent sliding seat (23).

5. A walk-in constant temperature and humidity test device according to claim 1, characterized in that: A water retaining mechanism (3) is provided on one side of the test box (1) near the box door (11). The water retaining mechanism (3) comprises a water retaining plate (31) vertically slidably mounted on the inside of the test box (1). The end of the water retaining plate (31) is fixedly connected to a limiting block (311). A fixed block (32) is fixedly connected to the side wall of the test box (1). A swing rod (33) is rotatably connected to the fixed block (32) via an elastic component. The upper end of the swing rod (33) is fixedly connected to a swing arm (34). The end of the swing arm (34) is fixedly connected to a limiting shaft (35). The limiting shaft (35) is supported on the bottom of the limiting block (311). The end of the rotating shaft (24) located at the bottom is fixedly connected to a cam (36). When the support plate (25) rotates downward, the cam (36) pushes the bottom of the swing rod (33) to separate the limiting shaft (35) from the limiting block (311), thereby causing the water retaining plate (31) to fall.

6. A walk-in constant temperature and humidity test device according to claim 5, characterized in that: An extension plate (37) is vertically slidably arranged inside the water baffle (31), a protrusion (371) is fixedly connected to one side of the upper end of the extension plate (37), and a support block (38) is fixedly connected to the inner wall of the test box (1). After the water baffle (31) falls, the support block (38) is used to support the protrusion (371).

7. A walk-in constant temperature and humidity test device according to claim 1, characterized in that: A control box is provided on one side of the test box (1), and an environment control unit is provided in the control box. The environment control unit comprises a heating system, a humidification system, a refrigeration system, and a ventilation system. The heating system, the humidification system, and the refrigeration system are connected to the interior of the test box (1) via the ventilation system, so as to adjust the temperature and humidity inside the test box (1).

8. A walk-in constant temperature and humidity test device according to claim 1, characterized in that: The walk-in constant temperature and humidity test device further comprises an air duct switching mechanism (4), the air duct switching mechanism (4) comprising an air duct 1 (41) and an air duct 2 (42), one side of the air duct 1 (41) having an air outlet 1 (411), one side of the air duct 2 (42) having an air outlet 2 (421), a switching tube 1 (43) being movably inserted inside the air duct 1 (41), and an end of the switching tube 1 (43) close to the air duct 2 (42) being fixedly connected to a convex column (43) 1), the convex column (431) has air holes (432) around its periphery, the second air duct (42) is movably plugged with a second switching tube (44) inside, the second switching tube (44) has a through opening (441) at one end close to the first air duct (41), the first air duct (41) is connected to the interior of the test box (1) at one end away from the second air duct (42), and the second air duct (42) is connected to the interior of the test box (1) through a ventilation system.

9. A walk-in constant temperature and humidity test device according to claim 8, characterized in that: The air duct switching mechanism (4) further comprises a switching component (45), wherein the switching component (45) comprises a transmission shaft (451), wherein the transmission shaft (451) is fixedly connected to the upper end of the upper short rod (274), wherein one end of the transmission shaft (451) is transmission-connected to a spur gear (453) via a bevel gear set (452), wherein the upper side and the lower side of the spur gear (453) are respectively meshed with a rack 1 (454) and a rack 2 (455), and the rack 1 (454) and the rack 2 (455) are respectively fixedly connected to the switching tube 2 (44) and the switching tube 1 (43).

10. A test method of a walk-in constant temperature and humidity test device, using a walk-in constant temperature and humidity test device as claimed in any one of claims 1 to 9, comprising the following steps: Step 1: During the test, the box door (11) is opened, the battery pack (5) is placed on the support plate (25), and then the box door (11) is closed to carry out the test; Step 2: When the sensor detects that the battery pack (5) in the test box (1) is on fire, the rotating drive component (26) drives the support plate (25) to rotate downward, so that the battery pack (5) slides from the support plate (25) to the bottom of the test box (1); Step 3: The water supply component pours water into the test box (1) so that the water submerges the battery pack (5) to extinguish the fire.

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