New energy automobile battery pack test and inspection device

Abstract

The invention relates to the technical field of new energy automobile battery pack detection, in particular to a new energy automobile battery pack test and inspection device which comprises an inspection device assembly used for water immersion detection. The battery pack placing assembly is used for placing a battery pack; the circulating filtering assembly is used for injecting water and draining water. The inspection device assembly comprises an inspection platform; the soaking box is fixed at the bottom of the inspection platform; the battery pack placing assembly comprises a placing basket which is mounted above the inspection platform in a lifting manner; the permanent magnet is fixed at the bottom of the placing basket; the lower pressing plate is welded on the right side of the placing basket; the drainage assembly comprises a liftable sealing conical rod which penetrates through the interior of the filtering box and the interior of the soaking box; the iron block is fixed at the top of the sealing cone rod; the water inlet assembly and the water outlet assembly are simple in structure and lower in manufacturing cost compared with an automatic control system, and automatic water inlet and outlet operation in the water immersion test detection process can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle battery pack detection, and in particular to a new energy vehicle battery pack testing and inspection device. Background Art

[0002] As the core power source of a vehicle, the performance, safety, and reliability of the battery pack of a new energy vehicle are directly related to the operation of the entire vehicle and the safety of its users. Waterproof testing of new energy vehicle battery packs is essential. Water immersion testing of new energy vehicle battery packs is a key step in evaluating their waterproof performance and safety. This test can simulate extreme water-related scenarios (such as heavy rain or flooded roads) to verify whether the battery pack meets IP67 / IP68 protection standards, preventing water intrusion that could cause short circuits, leakage, or thermal runaway. This ensures that the vehicle can continue to drive safely after water exposure and avoids the risk of fire or explosion caused by water ingress.

[0003] In order to facilitate water inlet and outlet, the current new energy vehicle battery pack immersion test and inspection equipment generally has an automatic control system to meet the automatic water inlet and outlet effect. The automatic control system usually includes sensors, microprocessors, solenoid valves and other equipment, and the microprocessor is used to control the timing of water inlet and outlet. This requires the automatic control system to introduce advanced sensors, controllers, actuators and other equipment. The purchase and installation costs of these devices are usually high, and the subsequent maintenance costs are also high. Summary of the Invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides a new energy vehicle battery pack testing and inspection device to solve the problem that the existing new energy vehicle battery pack immersion testing and inspection device realizes automatic water intake and drainage through an automatic control system, the purchase and installation costs of the equipment are usually high, and the subsequent maintenance costs are also high.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a new energy vehicle battery pack testing and inspection device, comprising:

[0008] An inspection device assembly for water immersion detection; a battery pack placement assembly for placing a battery pack; and a circulation filter assembly for water filling and drainage;

[0009] The inspection device assembly includes: an inspection platform; an immersion tank fixed to the bottom of the inspection platform;

[0010] The circulating filter assembly includes: a water storage tank fixed to the right side of the immersion tank; and a filter box fixed to the bottom of the immersion tank; a drainage assembly is provided between the filter box and the immersion tank, and a water inlet assembly is provided between the water storage tank and the immersion tank;

[0011] The battery pack placement assembly includes: a placement basket that is lifted and installed above the inspection platform; a permanent magnet fixed to the bottom of the placement basket; and a lower pressure plate welded to the right side of the placement basket;

[0012] The drainage assembly includes: a sealing cone rod that passes through the filter box and the immersion box and can be lifted and lowered; an iron block fixed to the top of the sealing cone rod;

[0013] The water inlet assembly includes: a water outlet pipe fixed to a side of the water storage tank close to the immersion tank; and a plug slidably installed inside the water outlet pipe.

[0014] By adopting the above technical solution, the battery pack placement assembly is lowered, and after entering the interior of the immersion tank, the plug can be driven downward by the lower pressure plate on the right side of the placement basket, so that the outlet pipe can discharge water normally without the need to use other automatic water inlet devices. At the same time, the placement basket that moves downward can be adsorbed on the top of the iron block by a permanent magnet. When the battery pack in the placement basket is moved upward and reset after the immersion detection is completed, the iron block can be pulled upward, thereby driving the sealing cone rod to move upward, and the water in the immersion tank can re-enter the filter box to achieve an automatic drainage effect. Due to the simple structure of the water inlet assembly and the drainage assembly, the production cost is lower than that of the automatic control system, which can meet the automatic water inlet and drainage operations during the immersion test.

[0015] As a preferred solution of the new energy vehicle battery pack testing and inspection device described in the present invention, the drainage assembly also includes: a connecting rod fixed to the bottom of the sealing cone rod; a drainage hole opened at the connection between the sealing cone rod and the immersion box and the filter box; a reset spring sleeved on the outside of the connecting rod; a movable plate welded to the bottom of the connecting rod; and a telescopic rod fixed to the bottom of the movable plate.

[0016] As a preferred solution of the new energy vehicle battery pack testing and inspection device described in the present invention, the vertical center lines of the iron block and the permanent magnet coincide with each other, and when the basket is placed, the permanent magnet and the iron block can be attached to each other and magnetically attracted.

[0017] As a preferred solution of the new energy vehicle battery pack testing and inspection device described in the present invention, the water inlet assembly also includes: a support tube fixed to the upper and lower sides of the water outlet pipe; a guide rod fixed to the bottom of the plug; a support spring sleeved on the outside of the guide rod; and a pressing plate fixed to the bottom of the guide rod.

[0018] As a preferred solution of the new energy vehicle battery pack testing and inspection device described in the present invention, wherein: the guide rod passes through one end of the bottom of the support tube and is provided with a sealing ring at the connection with the support tube, and the lower pressure plate can be lowered to fit with the pressing plate.

[0019] As a preferred solution of the new energy vehicle battery pack testing and inspection device described in the present invention, the circulation and filtration assembly also includes: a circulation pipe fixed between the water storage tank and the filter box; and a circulation pump installed in the middle of the circulation pipe through a flange.

[0020] As a preferred solution of the new energy vehicle battery pack testing and inspection device described in the present invention, the circulation filter assembly also includes: a first filter plate arranged inside the filter box; and a second filter plate arranged on the right side of the first filter plate, and the second filter plate and the first filter plate are located on the side of the filter box close to the circulation pipe.

[0021] As a preferred solution of the new energy vehicle battery pack testing and inspection device described in the present invention, the battery pack placement assembly also includes: a limit plate welded to the upper part of the placement basket; a front baffle with an L-shaped structure that slides through the front side of the bottom of the placement basket; a limit horizontal plate welded to the top of the front baffle; and an adjustment screw installed at the bottom of the front baffle through a bearing.

[0022] As a preferred solution of the new energy vehicle battery pack testing and inspection device described in the present invention, the battery pack placement assembly also includes: a supporting base plate welded to the front end of the placement basket; and fixed ear plates welded to the left and right sides of the placement basket; the adjusting screw passes through the supporting base plate and is threadedly connected to it, and the placement basket and the limit plate are both hollow mesh structures.

[0023] As a preferred solution of the new energy vehicle battery pack testing and inspection device described in the present invention, the inspection device assembly also includes: a support frame welded to the four corners of the top of the inspection platform; an upper top plate welded to the top of the support frame; a lifting hydraulic cylinder fixedly installed in the middle of the top of the upper top plate by bolts; a lifting plate fixedly installed at the telescopic end of the lifting hydraulic cylinder by bolts; and a guide column welded through the upper top plate and the fixed ear plate.

[0024] Beneficial effects of the present invention:

[0025] 1. A new energy vehicle battery pack testing and inspection device described in the present invention, through the descending battery pack placement assembly, after entering the interior of the immersion tank, can drive the plug downward through the lower pressure plate on the right side of the placement basket, so that the outlet pipe can discharge water normally, without the need for other automatic water inlet devices, and at the same time, the placement basket that moves downward can be adsorbed on the top of the iron block by a permanent magnet. When the battery pack in the placement basket is tested for immersion and then moves upward to reset, it can pull the iron block upward, thereby driving the sealing cone rod upward, and the water in the immersion tank can re-enter the filter box to achieve an automatic drainage effect. Due to the simple structure of the water inlet assembly and the drainage assembly, the manufacturing cost is lower than that of the automatic control system, and it can meet the automatic water inlet and drainage operations during the immersion test.

[0026] 2. The new energy vehicle battery pack testing and inspection device described in the present invention has a drainage assembly. After the permanent magnet and the iron block are attracted together, the permanent magnet drives the return spring to extend as the placement basket rises. Since the retraction force of the return spring increases linearly with the increase of the stretching distance, when the retraction force of the return spring exceeds the magnetic attraction force, the iron block will break away from the permanent magnet and separate, thereby causing the iron block to reset downward, and the sealing cone rod is reinserted into the drainage hole to seal the drainage hole, waiting for the next drainage operation;

[0027] 3. The new energy vehicle battery pack testing and inspection device described in the present invention has a water inlet component. After the lower pressure plate loses the downward pressure, the plug can be pushed upward by the retraction force of the support spring to reset the plug. Since the water inflow is based on the gravity of water, the water inflow can be stopped when the horizontal planes in the water storage tank and the immersion tank are consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic diagram of a new energy vehicle battery pack testing and inspection device in Example 1.

[0030] Figure 2 This is a half-section schematic diagram of a new energy vehicle battery pack testing and inspection device in Example 1;

[0031] Figure 3 This is a bottom-up schematic diagram of a new energy vehicle battery pack testing and inspection device in Example 1;

[0032] Figure 4 This is a schematic diagram of a drainage component of a new energy vehicle battery pack testing and inspection device in Example 1;

[0033] Figure 5 This is a schematic diagram of a water inlet component of a new energy vehicle battery pack testing and inspection device in Example 1;

[0034] Figure 6 This is a schematic diagram of a battery pack placement component of a new energy vehicle battery pack testing and inspection device in Example 2;

[0035] Figure 7 This is a bottom-up schematic diagram of a battery pack placement assembly of a new energy vehicle battery pack testing and inspection device in Example 2;

[0036] Figure 8 A half-section schematic diagram of a new energy vehicle battery pack testing and inspection device in Example 2 from another perspective;

[0037] Figure 9 This is a cross-sectional schematic diagram of a new energy vehicle battery pack testing and inspection device in Example 2;

[0038] Figure 10 This is a partial schematic diagram of the adjustment screw of a new energy vehicle battery pack testing and inspection device in Example 2.

[0039] In the figure: 1. Inspection device assembly; 101. Inspection platform; 102. Upper top plate; 103. Support frame; 104. Lifting plate; 105. Lifting hydraulic cylinder; 106. Guide column; 107. Immersion tank; 2. Battery pack placement assembly; 201. Placement basket; 202. Limiting plate; 203. Fixed ear plate; 204. Lower pressure plate; 205. Limiting horizontal plate; 206. Support bottom plate; 207. Adjusting screw; 208. Front baffle; 209. Permanent magnet; 3. Circulation filter assembly; 301. Water storage Box; 302, filter box; 303, circulation pipe; 304, circulation pump; 305, first filter plate; 306, second filter plate; 4, drainage assembly; 401, iron block; 402, sealing cone rod; 403, drainage hole; 404, return spring; 405, connecting rod; 406, movable plate; 407, telescopic rod; 5, water inlet assembly; 501, outlet pipe; 502, support pipe; 503, plug; 504, support spring; 505, pressing plate; 506, guide rod; 507, sealing ring. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it constitute a separate or selective embodiment that is mutually exclusive with other embodiments.

[0043] Implementation Case 1:

[0044] Reference Figure 1-Figure 5 , which is the first embodiment of the present invention, provides a new energy vehicle battery pack testing and inspection device, comprising:

[0045] An inspection device assembly 1 for water immersion detection; a battery pack placement assembly 2 for placing a battery pack; and a circulation filter assembly 3 for water filling and drainage;

[0046] The inspection device assembly 1 includes: an inspection platform 101; an immersion tank 107 fixed to the bottom of the inspection platform 101;

[0047] The circulation filter assembly 3 includes: a water storage tank 301 fixed to the right side of the immersion tank 107; and a filter box 302 fixed to the bottom of the immersion tank 107; a drainage assembly 4 is provided between the filter box 302 and the immersion tank 107, and a water inlet assembly 5 is provided between the water storage tank 301 and the immersion tank 107;

[0048] The battery pack placement assembly 2 includes: a placement basket 201 that is lifted and mounted above the inspection platform 101; a permanent magnet 209 fixed to the bottom of the placement basket 201; and a lower pressure plate 204 welded to the right side of the placement basket 201;

[0049] The drainage assembly 4 includes: a sealing cone rod 402 that passes through the filter box 302 and the immersion box 107 and can be lifted and lowered; an iron block 401 fixed to the top of the sealing cone rod 402;

[0050] The water inlet assembly 5 includes: a water outlet pipe 501 fixed to the side of the water storage tank 301 close to the immersion tank 107; and a plug 503 slidably installed inside the water outlet pipe 501.

[0051] It should be noted that, after the battery pack placement component 2 is lowered and enters the interior of the immersion tank 107, the plug 503 can be driven downward by the lower pressure plate 204 on the right side of the placement basket 201, so that the outlet pipe 501 can discharge water normally without the need to use other automatic water inlet devices. At the same time, the placement basket 201 that moves downward can be adsorbed on the top of the iron block 401 by the permanent magnet 209. When the battery pack in the placement basket 201 is moved upward and reset after the immersion detection is completed, the iron block 401 can be pulled upward, thereby driving the sealing cone rod 402 to move upward, and the water in the immersion tank 107 can re-enter the filter box 302 to achieve an automatic drainage effect. Since the structure of the water inlet component 5 and the drainage component 4 is simple, the manufacturing cost is lower than that of the automatic control system, which can meet the automatic water inlet and drainage operations during the immersion test.

[0052] Furthermore, the drainage assembly 4 also includes: a connecting rod 405 fixed to the bottom of the sealing cone rod 402; a drainage hole 403 opened at the connection between the sealing cone rod 402, the immersion box 107 and the filter box 302; a return spring 404 mounted on the outside of the connecting rod 405; a movable plate 406 welded to the bottom of the connecting rod 405; and a telescopic rod 407 fixed to the bottom of the movable plate 406.

[0053] It should be noted that the telescopic rod 407 is stretched as the movable plate 406 moves. When the iron block 401 on the sealing cone rod 402 moves upward, the tapered rod position of the sealing cone rod 402 enters the drainage hole 403. The water in the immersion tank 107 can enter the filter box 302 through the gap between the drainage hole 403 and the tapered rod position of the sealing cone rod 402 to achieve drainage. At this time, the reset spring 404 is in a stretched state, and the telescopic rod 407 is used to play a secondary guiding role in the movement of the sealing cone rod 402.

[0054] Furthermore, the vertical center lines of the iron block 401 and the permanent magnet 209 coincide with each other, and when the placement basket 201 descends, the permanent magnet 209 and the iron block 401 can be attached to each other and magnetically attracted.

[0055] It should be noted that after the permanent magnet 209 is adsorbed with the iron block 401, the permanent magnet 209 drives the reset spring 404 to stretch as the placement basket 201 rises. Since the retraction force of the reset spring 404 increases linearly with the increase of the stretching distance, when the retraction force of the reset spring 404 exceeds the magnetic attraction force, the iron block 401 will break away from the permanent magnet 209 and separate, thereby causing the iron block 401 to reset downward, and the sealing cone rod 402 is reinserted into the drainage hole 403 to seal the drainage hole 403.

[0056] Furthermore, the water inlet assembly 5 also includes: a support tube 502 fixed to the upper and lower sides of the water outlet pipe 501; a guide rod 506 fixed to the bottom of the plug 503; a support spring 504 sleeved on the outside of the guide rod 506; and a pressing plate 505 fixed to the bottom of the guide rod 506.

[0057] It should be noted that when the plug 503 moves downward, it can drive the guide rod 506 to move downward. At this time, the support spring 504 is stretched. After the plug 503 loses the downward pressure, the plug 503 can be pushed upward under the action of the retraction force of the support spring 504, and the plug 503 is reset.

[0058] Furthermore, a sealing ring 507 is provided at the connection between one end of the guide rod 506 passing through the bottom of the support tube 502 and the support tube 502, so that the lower pressure plate 204 can be fitted with the pressing plate 505 when it descends.

[0059] It should be noted that the position of the pressing plate 505 matches that of the lower pressing plate 204. When the lower pressing plate 204 moves downward under the action of the placement basket 201, it can push the pressing plate 505 downward. The pressing plate 505 can drive the guide rod 506 to slide inside the support tube 502. The sealing ring 507 seals it to prevent external water from entering the support tube 502.

[0060] Implementation Case 2:

[0061] Reference Figures 6-10 , which is the second embodiment of the present invention, provides a new energy vehicle battery pack testing and inspection device, comprising:

[0062] Furthermore, the circulation and filtration assembly 3 further includes: a circulation pipe 303 fixed between the water storage tank 301 and the filtration tank 302; and a circulation pump 304 installed in the middle of the circulation pipe 303 through a flange.

[0063] It should be noted that when the circulation pump 304 is working, the water in the filter box 302 can flow back into the water storage tank 301 through the circulation pipe 303.

[0064] Furthermore, the circulation filter assembly 3 also includes: a first filter plate 305 arranged inside the filter box 302; and a second filter plate 306 arranged on the right side of the first filter plate 305. The second filter plate 306 and the first filter plate 305 are located on the side of the filter box 302 close to the circulation pipe 303.

[0065] It should be noted that when the water in the filter box 302 enters the circulation pipe 303, it needs to be filtered twice by the first filter plate 305 and the second filter plate 306 before entering the water storage tank 301. The first filter plate 305 and the second filter plate 306 can be made of suitable filter membrane materials to filter impurities in the water, which can be adjusted according to actual needs.

[0066] Furthermore, the battery pack placement assembly 2 also includes: a limit plate 202 welded to the upper part of the placement basket 201; a front baffle 208 of an L-shaped structure that slides through the front side of the bottom of the placement basket 201; a limit horizontal plate 205 welded to the top of the front baffle 208; and an adjustment screw 207 installed at the bottom of the front baffle 208 through a bearing.

[0067] It should be noted that the top of the front baffle 208 passes through the placement basket 201 . After the battery pack is placed in the placement basket 201 , the front baffle 208 rises to prevent the battery pack from moving forward and leaving the placement basket 201 .

[0068] Furthermore, the battery pack placement assembly 2 also includes: a supporting base plate 206 welded to the front end of the placement basket 201; and fixed ear plates 203 welded to the left and right sides of the placement basket 201; the adjusting screw 207 passes through the supporting base plate 206 and is threadedly connected to it, and the placement basket 201 and the limiting plate 202 are both hollow mesh structures.

[0069] It should be noted that after the adjusting screw 207 is rotated, the front baffle 208 can be driven to move upward, and a groove that is compatible with the limiting horizontal plate 205 is opened at the bottom of the placement basket 201 for placing the limiting horizontal plate 205. After the limiting horizontal plate 205 is lowered, it can be embedded in the groove, making it convenient to place the battery pack inside the placement basket 201.

[0070] Furthermore, the inspection device assembly 1 also includes: a support frame 103 welded to the four corners of the top of the inspection platform 101; an upper top plate 102 welded to the top of the support frame 103; a lifting hydraulic cylinder 105 fixedly installed in the middle of the top of the upper top plate 102 by bolts; a lifting plate 104 fixedly installed at the telescopic end of the lifting hydraulic cylinder 105 by bolts; and a guide column 106 that passes through the upper top plate 102 and is welded to the fixed ear plate 203.

[0071] It should be noted that when the lifting hydraulic cylinder 105 is working, the telescopic end can be retracted downward, which can drive the lifting plate 104 to move downward. At this time, the lifting plate 104 can drive the guide column 106 to move downward. At this time, the fixed ear plate 203 connected to the guide column 106 moves downward, which can drive the battery pack placement component 2 to move downward until the battery pack placement component 2 enters the immersion tank 107 to perform an immersion test on the battery pack.

[0072] When the present invention is in use, the battery pack is placed inside the placement basket 201. After the adjusting screw 207 is rotated, the front baffle 208 can be driven to move upward to prevent the battery pack from moving forward and leaving the placement basket 201. Then, the lifting hydraulic cylinder 105 retracts the telescopic end downward to drive the lifting plate 104 to move downward. At this time, the lifting plate 104 can drive the guide column 106 to move downward. At this time, the fixed ear plate 203 connected to the guide column 106 moves downward, which can drive the placement basket 201 to move downward. , the lower pressing plate 204 moves downward synchronously under the action of the placing basket 201, and can push the pressing plate 505 downward, and the pressing plate 505 can drive the guide rod 506 to slide inside the support tube 502, and the plug 503 moves downward, and the plug 503 and the outlet pipe 501 move away from each other. The water in the water storage tank 301 enters the immersion tank 107 through the outlet pipe 501 under the action of gravity, realizing automatic water inflow. After the immersion time is reached, the placing basket 201 can be moved upward to reset, and at this time the permanent magnet 209 and The iron blocks 401 are adsorbed together, and when the iron block 401 on the sealing cone rod 402 moves upward, the tapered rod position of the sealing cone rod 402 enters the drainage hole 403, and the water in the immersion tank 107 can enter the filter box 302 through the gap between the drainage hole 403 and the tapered rod position of the sealing cone rod 402, thereby achieving drainage. At this time, the return spring 404 is in a stretched state, until the retraction force of the return spring 404 exceeds the magnetic attraction force, the iron block 401 will break away from the permanent magnet 209, thereby achieving separation. As a result, the iron block 401 is reset downward, and the sealing cone rod 402 is reinserted into the drainage hole 403 to seal the drainage hole 403. At the same time, after the pressing plate 505 loses the downward pressure, the plug 503 can be pushed upward under the action of the retraction force of the support spring 504, and the plug 503 is reset. When the circulation pump 304 is working, the water in the filter box 302 can pass through the first filter plate 305 and the second filter plate 306 for secondary filtration, and then flow back into the water storage tank 301 through the circulation pipe 303.

[0073] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new energy vehicle battery pack testing and inspection device, characterized in that: include: An inspection device assembly (1) for water immersion detection; A battery pack placement assembly (2) for placing a battery pack; and a circulation filter assembly (3) for water injection and drainage; The inspection device assembly (1) comprises: an inspection platform (101); a water immersion tank (107) fixed to the bottom of the inspection platform (101); The circulating filter assembly (3) comprises: a water storage tank (301) fixed to the right side of the immersion tank (107); and a filter box (302) fixed to the bottom of the immersion tank (107); a drainage assembly (4) is provided between the filter box (302) and the immersion tank (107), and a water inlet assembly (5) is provided between the water storage tank (301) and the immersion tank (107); The battery pack placement assembly (2) comprises: a placement basket (201) installed in a lifting manner above the inspection platform (101); a permanent magnet (209) fixed to the bottom of the placement basket (201); and a lower pressure plate (204) welded to the right side of the placement basket (201); The drainage assembly (4) comprises: a sealing cone rod (402) that passes through the filter box (302) and the immersion box (107) and can be lifted and lowered; an iron block (401) fixed to the top of the sealing cone rod (402); The water inlet assembly (5) comprises: a water outlet pipe (501) fixed to a side of the water storage tank (301) close to the immersion tank (107); and a plug (503) slidably mounted inside the water outlet pipe (501).

2. A new energy vehicle battery pack testing and inspection device according to claim 1, characterized in that: The drainage assembly (4) further comprises: a connecting rod (405) fixed to the bottom of the sealing cone rod (402); a drainage hole (403) provided at the connection between the sealing cone rod (402), the immersion box (107) and the filter box (302); a return spring (404) sleeved on the outside of the connecting rod (405); a movable plate (406) welded to the bottom of the connecting rod (405); and a telescopic rod (407) fixed to the bottom of the movable plate (406).

3. A new energy vehicle battery pack testing and inspection device according to claim 2, characterized in that: The vertical center lines of the iron block (401) and the permanent magnet (209) coincide with each other, and when the basket (201) is lowered, the permanent magnet (209) and the iron block (401) can be attached to each other and magnetically attracted.

4. A new energy vehicle battery pack testing and inspection device according to claim 1, characterized in that: The water inlet assembly (5) further comprises: a support pipe (502) fixed to the upper and lower sides of the water outlet pipe (501); a guide rod (506) fixed to the bottom of the plug (503); a support spring (504) sleeved on the outside of the guide rod (506); and a pressing plate (505) fixed to the bottom of the guide rod (506).

5. A new energy vehicle battery pack testing and inspection device according to claim 4, characterized in that: The guide rod (506) passes through one end of the bottom of the support tube (502) and is provided with a sealing ring (507) at the connection between the support tube (502), and the lower pressure plate (204) can be fitted with the pressing plate (505) when it descends.

6. A new energy vehicle battery pack testing and inspection device according to claim 1, characterized in that: The circulation filter assembly (3) further comprises: a circulation pipe (303) fixed between the water storage tank (301) and the filter box (302); and a circulation pump (304) installed in the middle of the circulation pipe (303) via a flange.

7. A new energy vehicle battery pack testing and inspection device according to claim 6, characterized in that: The circulation filter assembly (3) further comprises: a first filter plate (305) arranged inside the filter box (302); and a second filter plate (306) arranged on the right side of the first filter plate (305), wherein the second filter plate (306) and the first filter plate (305) are located on a side of the filter box (302) close to the circulation pipe (303).

8. The new energy vehicle battery pack testing and inspection device according to claim 1, characterized in that: The battery pack placement assembly (2) further comprises: a limiting plate (202) welded to the upper portion of the placement basket (201); a front baffle (208) of an L-shaped structure whose top slides through the front side of the bottom of the placement basket (201); a limiting horizontal plate (205) welded to the top of the front baffle (208); and an adjusting screw (207) mounted on the bottom of the front baffle (208) via a bearing.

9. A new energy vehicle battery pack testing and inspection device according to claim 8, characterized in that: The battery pack placement assembly (2) further comprises: a supporting base plate (206) welded to the front end of the placement basket (201); and fixed ear plates (203) welded to the left and right sides of the placement basket (201); the adjusting screw (207) passes through the supporting base plate (206) and is threadedly connected thereto; the placement basket (201) and the limiting plate (202) are both hollow mesh structures.

10. A new energy vehicle battery pack testing and inspection device according to claim 9, characterized in that: The inspection device assembly (1) further includes: a support frame (103) welded to the four corners of the top of the inspection platform (101); an upper top plate (102) welded to the top of the support frame (103); a lifting hydraulic cylinder (105) fixedly mounted in the middle of the top of the upper top plate (102) by bolts; a lifting plate (104) fixedly mounted to the telescopic end of the lifting hydraulic cylinder (105) by bolts; and a guide column (106) passing through the upper top plate (102) and welded to the fixed ear plate (203).

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