A battery box compression testing device

Abstract

The present invention relates to the field of battery box detection technology, and in particular to a battery box pressure resistance detection device, comprising a water tank for submerged detection of the air tightness of a liquid cooling plate, a baffle fixedly connected to the top of the water tank, an opening for feeding is opened in the middle of the baffle, a bent rod is hinged on one side of the baffle, a connecting rod is hinged on one end of the bent rod, and a sealing cover is fixedly connected to the other end to close the opening, a cylinder body is fixedly connected to the outer wall of the water tank, a plunger is slidably fitted in the cylinder body, the top of the plunger is hinged on the end of the connecting rod, and an electric cylinder is fixedly connected to the outer wall of the water tank. The battery box pressure resistance detection device provided by the present invention can quickly remove air attached to the surface of the liquid cooling plate during the process of performing air tightness detection on the liquid cooling plate of the battery box to prevent bubbles formed by the escape of these air from affecting the observation results of the detection personnel.

Description

Technical Field

[0001] The present invention relates to the technical field of battery box detection, and in particular to a battery box compression resistance detection device. Background Art

[0002] During the production process, battery boxes used in new energy vehicle power systems need to be randomly sampled for compression testing to ensure product quality.

[0003] like Figure 1 As shown, most battery boxes in the prior art are composed of three parts: an upper cover, a shell and a liquid cooling plate, wherein the shell is used to accommodate the battery pack, the upper cover seals the top of the shell and is provided with a pole connected to the battery pack, and the liquid cooling plate is fixed to the bottom of the shell to cool and dissipate heat when the battery pack is working. When the battery box is subjected to compression testing, it is necessary to use external forces of varying sizes to impact the entire battery box, detect the deformation of the appearance of the battery box after the impact, and then disassemble each part of the impacted battery box and conduct independent testing, such as ultrasonic testing of the shell weld, the disconnection of the upper cover pole route, and the air tightness test of the liquid cooling plate.

[0004] Among them, when testing the air tightness of the liquid cooling plate, the submerged detection method is often used for detection, specifically: first fill the liquid cooling plate with gas, then sink the liquid cooling plate to the bottom of the water tank, and observe whether there will be bubbles near the liquid cooling plate in the water tank, so as to detect the air tightness of the liquid cooling plate. However, most of the liquid cooling plates in the prior art are provided with tortuous and complex liquid cooling flow channels, and air is easily contained in the dead corners and turning points of these flow channels. When the inspector observes the liquid cooling plate sunk to the bottom of the water tank, the air will also intermittently escape from the liquid cooling plate, forming bubbles in the water tank, which interferes with the inspection personnel's observation and affects the accuracy of the air tightness detection of the liquid cooling plate. Summary of the invention

[0005] The purpose of the present invention is to solve the defect in the prior art that the air attached to the surface of the liquid cooling plate interferes with the observation results of the inspectors, and to propose a battery box compression detection device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A battery box pressure resistance detection device is designed, including a water tank for submerged testing of the air tightness of a liquid cooling plate, a baffle is fixedly connected to the top of the water tank, an opening for feeding is opened in the middle of the baffle, a bent rod is hinged on one side of the baffle, a connecting rod is hinged on one end of the bent rod, and a sealing cover is fixedly connected to the other end to close the opening, a cylinder body is fixedly connected to the outer wall of the water tank, a plunger is slidably fitted in the cylinder body, the top of the plunger is hinged on the end of the connecting rod, an electric cylinder is fixedly connected to the outer wall of the water tank, the output end of the electric cylinder is fixedly connected to the top of the plunger, a first shell is fixedly connected to the sealing cover, the first shell passes through the sealing cover and is slidably fitted with wedge blocks on both sides of the bottom surface of the first shell, a first through hole is opened on one side of the wedge block, a second through hole is opened on the bottom surface of the first shell to connect the first through hole with the inside of the first shell, a first spring is fixedly connected to the bottom surface of the first shell to apply elastic force to the wedge block, and the top of the first shell is connected to the cylinder body through a hose.

[0008] Preferably, the projection of the inclined surface of the wedge-shaped block on the baffle is located on the edge of the opening.

[0009] Preferably, an internal threaded tube is rotatably installed at the bottom of the water tank, the internal thread of the internal threaded tube is matched with an external threaded tube, the bottom end of the external threaded tube is connected to the gas source, a clamp is provided at the top of the external threaded tube to clamp the liquid cooling plate, and a connecting pipe is connected to the top of the external threaded tube to fill the gas from the gas source into the liquid cooling plate.

[0010] Preferably, the clamp includes a second shell, which is rotatably mounted on the top of the external threaded tube, and a clamp is slidably fitted on the second shell. A second spring is provided at the bottom of the second shell to apply elastic force to the clamp, one end of the connecting tube is connected to the top of the external threaded tube, and the other end is connected to the second shell, and an inflation joint is fixedly connected to the second shell to connect the liquid inlet and outlet ports of the liquid cooling plate.

[0011] Preferably, a driving structure is provided on the outer wall of the water tank for driving the internal threaded tube to rotate, the driving structure includes a movable rod, the movable rod is slidably fitted on the bottom of the cylinder body, and one end of the movable rod is fixedly connected to the bottom end of the plunger, and the other end is fixedly connected to a short rack, a first pulley is rotatably installed on the outer wall of the water tank, a transmission gear is coaxially fixedly connected to the end face of the first pulley, the transmission gear matches the short rack, a second pulley is coaxially fixedly connected to the bottom end face of the internal threaded tube, the first pulley and the second pulley are driven by a belt, and a steering roller is rotatably installed at the bottom of the water tank to tension the belt.

[0012] Preferably, a limiting structure is provided in the water tank to ensure that the internal threaded tube rotates relative to the internal threaded tube, and the limiting structure includes a long rack and a cross bar, the long rack is vertically fixed to the inner wall of the water tank, one end of the cross bar is fixed to the outer wall of the external threaded tube, and the other end is slidably fitted in the long rack.

[0013] Preferably, a rotating structure is provided on the cross bar to drive the second shell to rotate, and the rotating structure includes a long shaft, and the long shaft is rotatably installed on the cross bar. One end of the long shaft is fixedly connected to a large gear and the other end is fixedly connected to a small gear, and the small gear matches the long rack. The bottom surface of the second shell is fixedly connected to an end gear, and the large gear matches the end gear.

[0014] The battery box compression test device proposed by the present invention has the beneficial effect that: during the process of air tightness test on the liquid cooling plate of the battery box, the battery box compression test device provided by the present invention can quickly remove the air attached to the surface of the liquid cooling plate to prevent the bubbles formed by the air escape from affecting the observation results of the test personnel. After the test is completed, the device can also use centrifugal force to clean the water stains attached to the surface of the liquid cooling plate to prevent the ground of the test site from getting wet after the water stains drip. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the structure of a battery box in the prior art.

[0016] Figure 2 A schematic diagram of the structure of a battery box compression detection device proposed by the present invention Figure 1 .

[0017] Figure 3 A schematic diagram of the structure of a battery box compression detection device proposed by the present invention Figure 2 .

[0018] Figure 4 A schematic diagram of the structure of a battery box compression detection device proposed by the present invention Figure 3 .

[0019] Figure 5 This is a rear view of a battery box compression detection device proposed by the present invention.

[0020] Figure 6 A battery box compression detection device proposed by the present invention Figure 5 AA section view.

[0021] Figure 7 A battery box compression detection device proposed by the present invention Figure 5 Mid-CC section view.

[0022] Figure 8 A battery box compression detection device proposed by the present invention Figure 7 Enlarged view of point E in the middle.

[0023] Fig. 9 A battery box compression detection device proposed by the present invention Figure 7Middle DD section view.

[0024] Fig.10 A battery box compression detection device proposed by the present invention Fig. 9 Enlarged view of point F in the middle.

[0025] Fig.11 This is a schematic diagram of the structure inside a water tank of a battery box pressure resistance detection device proposed by the present invention.

[0026] Fig.12 A schematic diagram of the structure of a clamp for a battery box compression test device proposed by the present invention Figure 1 .

[0027] Fig.13 A schematic diagram of the structure of a clamp for a battery box compression test device proposed by the present invention Figure 2 .

[0028] In the figure: 1, water tank; 2, baffle; 201, opening; 3, sealing cover; 4, bent rod; 5, connecting rod; 6, plunger; 7, cylinder body; 8, movable rod; 9, electric cylinder; 10, short rack; 11, first pulley; 12, transmission gear; 13, belt; 14, steering roller; 15, second pulley; 16, externally threaded pipe; 17, cross bar; 18, long rack; 19, small gear; 20, long shaft; 21, second shell; 22, splint; 23, second spring; 24, inflation joint; 25, internally threaded pipe; 26, end gear; 27, hose; 28, first shell; 29, second through hole; 30, wedge block; 31, first spring; 32, first through hole; 33, large gear; 34, connecting pipe. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Reference Figure 2-Figure 10A battery box pressure resistance detection device includes a water tank 1 for submerged testing of the air tightness of a liquid cooling plate, a baffle 2 is fixedly connected to the top of the water tank 1, an opening 201 for feeding is opened in the middle of the baffle 2, a bent rod 4 is hinged on one side of the baffle 2, a connecting rod 5 is hinged on one end of the bent rod 4, and a sealing cover 3 is fixedly connected to the other end to close the opening 201, a cylinder body 7 is fixedly connected to the outer wall of the water tank 1, a plunger 6 is slidably fitted in the cylinder body 7, the top of the plunger 6 is hinged on the end of the connecting rod 5, an electric cylinder 9 is fixedly connected to the outer wall of the water tank 1, and the output end of the electric cylinder 9 is fixedly connected to the top of the plunger 6 A first shell 28 is fixedly connected to the sealing cover 3. The first shell 28 passes through the sealing cover 3 and is slidably fitted with wedge blocks 30 on both sides of the bottom surface of the first shell 28. The projection of the inclined surface of the wedge block 30 on the baffle 2 is located on the edge of the opening 201. A first through hole 32 is opened on one side of the wedge block 30, and a second through hole 29 is opened on the bottom surface of the first shell 28 to connect the first through hole 32 with the inside of the first shell 28. A first spring 31 is fixedly connected to the bottom surface of the first shell 28 to apply elastic force to the wedge block 30. The top of the first shell 28 is connected to the cylinder body 7 through a hose 27.

[0031] When the device performs submerged testing on the liquid cooling plate, the liquid cooling plate to be tested is sent into the water tank 1 through the opening 201, and the sealing cover 3 is driven by the linear movement of the output end of the electric cylinder 9 to close the opening 201. When the sealing cover 3 approaches the opening 201, the plunger 6 moves upward in the cylinder body 7, thereby reducing the air pressure in the cylinder body 7. Since the cylinder body 7 and the first shell 28 are connected through the hose 27, the air pressure in the cylinder body 7 is reduced, which keeps the first shell 28 in a negative pressure state. When the sealing cover 3 abuts against the opening 201, the inside of the water tank 1 is in a sealed state, and the airtight During the contact between the cover 3 and the opening 201, the edge portion of the opening 201 will abut against the inclined surface of the wedge block 30 to drive the wedge block 30 to slide on the first shell 28 while compressing the first spring 31. After the wedge block 30 completes sliding on the first shell 28, the first through hole 32 will overlap with the second through hole 29. After the two through holes overlap, the water tank 1 will be connected to the first shell 28. At this time, the first shell 28 will suck the air in the water tank 1, so that the air attached to the surface of the liquid cooling plate to be tested can quickly escape to prevent it from interfering with the observation results of the tester.

[0032] A one-way valve for discharging the internal gas of the cylinder body 7 is arranged at the bottom thereof. When the electric cylinder 9 is reset, the air sucked in the cylinder body 7 is discharged through the one-way valve.

[0033] like Fig.11 , Fig.12 and Figure 6-Figure 9An internal threaded tube 25 is rotatably installed at the bottom of the water tank 1, and the internal thread of the internal threaded tube 25 is matched with an external threaded tube 16. The bottom end of the external threaded tube 16 is connected to the gas source, and a clamp is provided on the top of the external threaded tube 16 to clamp the liquid cooling plate. A connecting pipe 34 is connected to the top of the external threaded tube 16 to fill the gas of the gas source into the liquid cooling plate. The clamp includes a second shell 21, and the second shell 21 is rotatably installed on the top of the external threaded tube 16. A clamp 22 is slidably matched on the second shell 21. A second spring 23 is provided at the bottom of the second shell 21 to apply elastic force to the clamp 22. One end of the connecting pipe 34 is connected to the top of the external threaded tube 16, and the other end is connected to the second shell 21. An inflation joint 24 is fixedly connected to the second shell 21 to connect the liquid inlet and outlet ports of the liquid cooling plate.

[0034] When placing the liquid cooling plate to be tested into the water tank, slide the clamping plate 22 on the second shell 21 to leave a space between the clamping plate 22 and the second shell 21 for accommodating the liquid cooling plate to be tested, place the liquid cooling plate to be tested between the clamping plate 22 and the second shell 21, and connect the liquid inlet and outlet ports of the liquid cooling plate to be tested to the inflation joint 24. Under the elastic force of the second spring 23, the clamping plate 22 applies force to the liquid cooling plate to be tested so as to fix the liquid cooling plate to be tested.

[0035] like Figure 11-13 As shown, a driving structure is provided on the outer wall of the water tank 1 to drive the internal threaded tube 25 to rotate, and the driving structure includes a movable rod 8, which is slidably fitted at the bottom of the cylinder body 7, and one end of the movable rod 8 is fixedly connected to the bottom end of the plunger 6, and the other end is fixedly connected to a short rack 10. A first pulley 11 is rotatably installed on the outer wall of the water tank 1, and a transmission gear 12 is coaxially fixedly connected to the end face of the first pulley 11, and the transmission gear 12 matches the short rack 10. A second pulley 15 is coaxially fixedly connected to the bottom end face of the internal threaded tube 25, and the first pulley 11 and the second pulley 15 are driven by a belt 13. A steering roller 14 is rotatably installed at the bottom of the water tank 1 to tension the belt 13. A limiting structure is provided in the water tank 1 to ensure that the internal threaded tube 25 rotates relative to the external threaded tube 16. The limiting structure includes a long rack 18 and a cross bar 17, and the long rack 18 is vertically fixed to the inner wall of the water tank 1.

[0036] After the clamp has fixed the liquid cooling plate to be tested, the sealing cover 3 will start to close the opening 201. Based on the above description, it can be known that in the process of the sealing cover 3 closing the opening 201, the plunger 6 will slide in the cylinder body 7. In the process of sliding the plunger 6 in the cylinder body 7, the short rack 10 will be driven to move linearly. Since the short rack 10 is meshed with the transmission gear 12, the short rack 10 will drive the transmission gear 12 to rotate during its linear movement. The rotation of the transmission gear 12 will drive the first pulley 11 to rotate. During the rotation of the first pulley 11, the second pulley 15 will be driven to rotate through the belt 13. The rotation of the second pulley 15 will drive the internal threaded tube 25 to rotate.

[0037] Since the internal threaded tube 25 and the external threaded tube 16 are threadedly matched, and the external threaded tube 16 cannot rotate under the cooperation of the cross bar 17 and the long rack 18, the external threaded tube 16 performs a lifting movement under the action of the screw principle, so that the liquid cooling plate to be tested clamped by the clamp moves up or down in the water tank 1 through the lifting and lowering movement of the external threaded tube 16.

[0038] like Figure 11-13 As shown, one end of the cross bar 17 is fixedly connected to the outer wall of the external threaded tube 16, and the other end is slidably fitted on the long rack 18. A rotating structure is provided on the cross bar 17 to drive the second shell 21 to rotate. The rotating structure includes a long shaft 20, and the long shaft 20 is rotatably installed on the cross bar 17. One end of the long shaft 20 is fixedly connected to a large gear 33, and the other end is fixedly connected to a small gear 19. The small gear 19 matches the long rack 18. The bottom surface of the second shell 21 is fixedly connected to an end gear 26, and the large gear 33 matches the end gear 26.

[0039] During the lifting and lowering movement of the external threaded tube 16, the cross bar 17 will also perform the lifting and lowering movement synchronously. Since the pinion 19 is meshed with the long rack 18 and the pinion 19 will perform the lifting and lowering movement synchronously with the cross bar 17, the long rack 18 will drive the pinion 19 to rotate during the lifting and lowering movement of the cross bar 17. The rotation of the pinion 19 will drive the large gear 33 to rotate through the long shaft 20. The rotation of the large gear 33 will drive the end gear 26 to rotate. Since the end gear 26 is fixedly connected to the second shell 21, the rotation of the end gear 26 will drive the second shell 21 to rotate synchronously, thereby causing the liquid cooling plate to be tested in the fixture to rotate synchronously.

[0040] Working principle and workflow:

[0041] by Figure 3 The state shown is the initial state, and the steps are as follows:

[0042] S1: The inspector manually drives the clamping plate 22 to slide on the second shell 21 so that a space is left between the clamping plate 22 and the second shell 21 for accommodating the liquid cooling plate to be inspected, and the liquid cooling plate to be inspected is placed between the clamping plate 22 and the second shell 21, and the liquid inlet and outlet ports of the liquid cooling plate to be inspected are docked with the inflation joint 24. After removing the external force, the clamping plate 22 applies force to the liquid cooling plate to be inspected under the elastic force of the second spring 23 to fix the liquid cooling plate to be inspected.

[0043] S2: Start the electric cylinder 9, so that the electric cylinder 9 drives the plunger 6 to move upward in the cylinder body 7. During the upward movement of the plunger 6, the sealing cover 3 is driven to approach the opening 201 through the connecting rod 5 and the bent rod 4, so that the sealing cover 3 seals the opening 201;

[0044] When the sealing cover 3 approaches the opening 201, the plunger 6 moves upward in the cylinder 7, which reduces the air pressure in the cylinder 7. Since the cylinder 7 and the first housing 28 are connected via the hose 27, the reduced air pressure in the cylinder 7 keeps the first housing 28 in a negative pressure state.

[0045] When the sealing cover 3 abuts against the opening 201, the interior of the water tank 1 is in a sealed state, and during the contact between the sealing cover 3 and the opening 201, the edge of the opening 201 will abut against the inclined surface of the wedge block 30 to drive the wedge block 30 to slide on the first shell 28 while compressing the first spring 31. After the wedge block 30 completes sliding on the first shell 28, the first through hole 32 will overlap with the second through hole 29. After the two through holes overlap, the water tank 1 will be connected to the first shell 28. At this time, the first shell 28 will suck the air in the water tank 1, so that the air attached to the surface of the liquid cooling plate to be tested can quickly escape to prevent it from interfering with the observation results of the tester.

[0046] S3: In the above step S2, the plunger 6 will drive the short rack 10 to move linearly during the sliding process in the cylinder body 7. Since the short rack 10 is meshed with the transmission gear 12, the short rack 10 will drive the transmission gear 12 to rotate during the linear movement. The rotation of the transmission gear 12 will drive the first pulley 11 to rotate. During the rotation of the first pulley 11, the second pulley 15 will be driven to rotate through the belt 13. The rotation of the second pulley 15 will drive the internal threaded tube 25 to rotate.

[0047] Since the internal threaded tube 25 and the external threaded tube 16 are threadedly matched, and the external threaded tube 16 cannot rotate under the cooperation of the cross bar 17 and the long rack 18, the external threaded tube 16 moves downward under the action of the screw principle, so that the liquid cooling plate to be tested clamped by the clamp moves downward in the water tank 1 through the downward movement of the external threaded tube 16 until the liquid cooling plate to be tested sinks to the bottom of the water tank 1.

[0048] S4: In the above step S3, the external threaded tube 16 will drive the cross bar 17 to move downward synchronously during the downward movement. Since the small gear 19 is meshed with the long rack 18 and the small gear 19 will move downward synchronously with the cross bar 17, the long rack 18 will drive the small gear 19 to rotate during the downward movement of the cross bar 17. The rotation of the small gear 19 will drive the large gear 33 to rotate through the long shaft 20. The rotation of the large gear 33 will drive the end gear 26 to rotate. Since the end gear 26 is fixedly connected to the second shell 21, the rotation of the end gear 26 will drive the second shell 21 to rotate synchronously, so that the liquid cooling plate to be tested in the fixture will rotate synchronously. During the rotation of the liquid cooling plate to be tested, the air pressure at its edge is relatively low, so that the air attached to the middle part of the liquid cooling plate to be tested moves to the edge of the liquid cooling plate to be tested, so that the first shell 28 can suck the air.

[0049] S5: When the liquid cooling plate to be tested sinks to the bottom of the water tank 1, a gas source is used to fill the external threaded tube 16 with high-pressure gas. After the high-pressure gas enters the second shell 21 through the connecting tube 34, it is inflated into the liquid cooling plate to be tested through the inflation joint 24. At this time, the inspector can confirm the air tightness of the liquid cooling plate to be tested by observing the formation of bubbles on the surface of the liquid cooling plate to be tested.

[0050] S6: After the detection is completed, the electric cylinder 9 is restarted to drive the sealing cover 3 to open from the opening 201. During the process of the sealing cover 3 opening from the opening 201, the wedge block 30 is reset under the action of the first spring 31, thereby closing the second through hole 29;

[0051] When the sealing cover 3 is opened, the plunger 6 moves downward in the cylinder 7, and the air sucked in the cylinder 7 is discharged from the one-way valve at the bottom thereof.

[0052] S7: The downward movement of the plunger 6 drives the movable rod 8 to move downward, and the downward movement of the movable rod 8 drives the short rack 10 to move downward. The downward movement of the short rack 10 drives the transmission gear 12 to reverse. During the reversal of the transmission gear 12, the first pulley 11, the belt 13 and the second pulley 15 drive the internal threaded tube 25 to reverse. The reversal of the internal threaded tube 25 drives the external threaded tube 16 to move upward, so that the liquid cooling plate to be tested clamped by the fixture floats to the surface.

[0053] S8: During the upward movement of the external threaded tube 16, the cross bar 17 will be driven to move upward synchronously. Since the small gear 19 is meshed with the long rack 18 and the small gear 19 will move upward synchronously with the cross bar 17, the long rack 18 will drive the small gear 19 to rotate during the upward movement of the cross bar 17. The rotation of the small gear 19 will drive the large gear 33 to rotate through the long shaft 20. The rotation of the large gear 33 will drive the end gear 26 to rotate. Since the end gear 26 is fixedly connected to the second shell 21, the rotation of the end gear 26 will drive the second shell 21 to rotate synchronously, thereby causing the liquid cooling plate to be detected in the fixture to rotate synchronously. After the liquid cooling plate to be detected floats to the surface, the rotation of the liquid cooling plate to be detected can throw off the moisture attached to its surface, thereby using the centrifugal force generated during the rotation process to dry the liquid cooling plate to be detected, so as to prevent the dripping water stains from causing the ground of the detection site to be wet during the process of taking the liquid cooling plate to be detected out of the water tank 1.

[0054] Compared with the prior art, the battery box compression test device provided by the present invention can quickly remove the air attached to the surface of the liquid cooling plate during the air tightness test of the liquid cooling plate of the battery box to prevent the bubbles formed by the air escape from affecting the observation results of the test personnel. After the test is completed, the device can also use centrifugal force to clean the water stains attached to the surface of the liquid cooling plate to prevent the ground of the test site from getting wet after the water stains drip.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A battery box pressure resistance testing device, comprising a water tank (1) for submerged testing of the air tightness of a liquid cooling plate, a baffle (2) fixedly connected to the top of the water tank (1), an opening (201) for feeding is provided in the middle of the baffle (2), characterized in that: A bent rod (4) is hingedly connected to one side of the baffle (2); a connecting rod (5) is hingedly connected to one end of the bent rod (4); a sealing cover (3) is fixedly connected to the other end to seal the opening (201); a cylinder body (7) is fixedly connected to the outer wall of the water tank (1); a plunger (6) is slidably fitted in the cylinder body (7); the top of the plunger (6) is hingedly connected to the end of the connecting rod (5); an electric cylinder (9) is fixedly connected to the outer wall of the water tank (1); the output end of the electric cylinder (9) is fixedly connected to the top of the plunger (6); and a first housing (201) is fixedly connected to the sealing cover (3). 8), the first shell (28) passes through the sealing cover (3) and is slidably fitted with wedge blocks (30) on both sides of the bottom surface of the first shell (28), a first through hole (32) is provided on one side of the wedge block (30), a second through hole (29) is provided on the bottom surface of the first shell (28) to connect the first through hole (32) with the inside of the first shell (28), a first spring (31) is fixedly connected to the bottom surface of the first shell (28) to apply elastic force to the wedge block (30), and the top of the first shell (28) is connected to the cylinder body (7) through a hose (27); During the contact between the sealing cover (3) and the opening (201), the edge of the opening (201) will abut against the inclined surface of the wedge block (30), thereby driving the wedge block (30) to slide on the first shell (28) and compressing the first spring (31). After the wedge block (30) has completed sliding on the first shell (28), the first through hole (32) will overlap with the second through hole (29). After the two through holes overlap, the water tank (1) will be connected to the first shell (28).

2. The battery box compression detection device according to claim 1, characterized in that: The projection of the inclined surface of the wedge-shaped block (30) on the baffle (2) is located on the edge of the opening (201).

3. The battery box compression detection device according to claim 2, characterized in that: An internally threaded tube (25) is rotatably mounted at the bottom of the water tank (1); the internal threads of the internally threaded tube (25) are matched with an externally threaded tube (16); the bottom end of the externally threaded tube (16) is connected to a gas source; a clamp is provided at the top of the externally threaded tube (16) to clamp the liquid cooling plate; a connecting tube (34) is connected to the top of the externally threaded tube (16) to fill the gas from the gas source into the liquid cooling plate.

4. The battery box compression detection device according to claim 3, characterized in that: The clamp comprises a second shell (21), the second shell (21) is rotatably mounted on the top of the externally threaded tube (16), a clamp (22) is slidably fitted on the second shell (21), a second spring (23) is provided at the bottom of the second shell (21) to apply elastic force to the clamp (22), one end of the connecting tube (34) is connected to the top of the externally threaded tube (16), and the other end is connected to the second shell (21), and an inflation joint (24) is fixedly connected to the second shell (21) for connecting the liquid inlet and outlet ports of the liquid cooling plate.

5. The battery box compression detection device according to claim 3 or 4, characterized in that: A driving structure is provided on the outer wall of the water tank (1) for driving the internally threaded tube (25) to rotate. The driving structure comprises a movable rod (8), the movable rod (8) is slidably fitted on the bottom of the cylinder body (7), one end of the movable rod (8) is fixedly connected to the bottom end of the plunger (6), and the other end is fixedly connected to a short rack (10). A first pulley (11) is rotatably mounted on the outer wall of the water tank (1), a transmission gear (12) is coaxially fixedly connected to the end surface of the first pulley (11), and the transmission gear (12) matches the short rack (10). A second pulley (15) is coaxially fixedly connected to the bottom end surface of the internally threaded tube (25), and a belt (13) is used to transmit power between the first pulley (11) and the second pulley (15). A steering roller (14) is rotatably mounted on the bottom of the water tank (1) to tension the belt (13).

6. The battery box compression detection device according to claim 5, characterized in that: A limiting structure is provided inside the water tank (1) to ensure that the internally threaded tube (25) rotates relative to the externally threaded tube (16), the limiting structure comprising a long rack (18) and a cross bar (17), the long rack (18) being vertically fixed to the inner wall of the water tank (1), one end of the cross bar (17) being fixed to the outer wall of the externally threaded tube (16), and the other end being slidably fitted in the long rack (18).

7. The battery box compression detection device according to claim 6, characterized in that: The cross bar (17) is provided with a rotating structure for driving the second housing (21) to rotate, the rotating structure comprising a long shaft (20), the long shaft (20) being rotatably mounted on the cross bar (17), one end of the long shaft (20) being fixedly connected to a large gear (33), and the other end of the long shaft (20) being fixedly connected to a small gear (19), the small gear (19) matching the long rack (18), the bottom surface of the second housing (21) being fixedly connected to an end face gear (26), the large gear (33) matching the end face gear (26).

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