A positioning clamp for battery pack shell detection

Abstract

The application relates to the technical field of detection positioning, and discloses a positioning clamp for battery pack shell detection, which comprises a positioning feeding module, a feeding frame arranged in the front-rear direction, a pair of feeding belts rotatably arranged on the feeding frame, and a battery pack shell inserted on the feeding belts. A local top pressing module is arranged at the bottom of the positioning feeding module. After the battery pack shell is clamped and positioned by the upper clamping module, the battery pack shell is lifted to the strength detection module for overall strength detection, and the local top pressing module is used for local strength detection. Compared with the prior art, the battery pack shell can be subjected to strength detection in multiple modes, the deformation degree and influence of the battery pack shell can be determined through the air pressure change in the battery pack shell, and the strength detection accuracy and reliability are improved.

Description

Technical Field

[0001] This invention relates to the field of detection and positioning technology, specifically to a positioning fixture for detecting battery pack casings. Background Technology

[0002] The battery pack casing is the external protective structure of the battery pack and one of the core key components of new energy batteries. It provides physical protection, isolation and insulation, and auxiliary heat dissipation for the battery. At the same time, it determines the battery pack's pressure resistance, safety and lightweight level. In order to improve battery quality and safety, the casing needs to be tested for strength before battery assembly.

[0003] Traditional strength testing often involves using a hydraulic rod to drive a mandrel to apply pressure to a localized area of ​​the battery pack casing, observing whether the casing deforms or is damaged. However, this method offers limited testing results and fails to reflect the overall compressive strength and structural integrity of the battery pack casing. Furthermore, relying solely on visual observation or point-to-point measurement makes it difficult to detect minute deformations of the battery pack casing under pressure, leading to misjudgments in the strength test results. This affects the accuracy and reliability of the strength test and reduces the safety of the battery pack casing in actual use. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a positioning fixture for testing battery pack housings, which can perform strength testing on battery pack housings through a combination of various methods, and can determine the degree of deformation and its impact by changes in air pressure inside the housing, thereby improving the accuracy and reliability of strength testing.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: A positioning fixture for testing battery pack housings, comprising: The positioning and feeding module includes a feeding frame arranged in the front-to-back direction, on which a pair of feeding belts are rotatably mounted. The two feeding belts are mirror images of each other, and the housing is inserted into the feeding belts. The positioning and feeding module is provided with an upper clamping module in the middle. The upper clamping module includes a positioning frame, which is horizontally arranged on the feeding frame. The top of the positioning and feeding module is provided with a feeding groove. The bottom plate is provided with upright plates on both sides of the positioning and feeding module. A positioning slide rod is horizontally arranged between the top of the upright plate and the two side plates of the positioning frame. The positioning slide rod is provided with an elastic clamping structure and an upper protection structure. After the shell is clamped and positioned by the elastic clamping structure, it moves up and down by the upper protection structure. The positioning frame is equipped with a strength detection module at the top and a local pressing module at the bottom. After the housing is clamped and positioned by the upper clamping module, it is pushed onto the strength detection module for overall strength detection and local pressing module for local strength detection.

[0006] Furthermore, multiple positioning frames are evenly arranged circumferentially on the outer sides of the two feeding belts. The positioning frames are arranged corresponding to the bottom corners of the packaging shell, and the bottom of the packaging shell is inserted and fitted into the positioning frames.

[0007] Furthermore, the elastic clamping structure includes a clamping seat, and a pair of clamping grooves are mirror-shaped on the top surface of the positioning frame. The clamping seat is vertically arranged, with its bottom slidably mounted on the positioning slide rod and its top slidably mounted in the clamping groove. A tension spring is horizontally arranged between one side of the clamping seat and the same side upright plate, and a lifting seat is slidably arranged on the other side. A locking head is provided on the top of the lifting seat. The locking head is an L-shaped frame structure and is adapted to the left and right sides of the bottom of the casing.

[0008] Furthermore, the upper protective structure includes left and right rotating screws, which are arranged laterally left and right, with one end rotatably mounted on the positioning frame and the other end connected to the upper motor drive shaft mounted on the positioning frame. Sliding seats are slidably mounted on the positioning slide rod between the clamping seat and the side plate of the positioning frame, and the bottom of the two sliding seats are threaded onto the left and right rotating screws respectively. The top of each sliding seat is hinged with a support rod, and the other end of the support rod is hinged to the bottom of the lifting seat on the same side.

[0009] Furthermore, the partial pressing module includes an electric push rod, a support is provided in the middle of the positioning frame, the electric push rod is vertically arranged between the two feeding belts, and the fixed end is set on the support. The telescopic end is provided with a push plate, a top cap is movably sleeved on the push plate, and a pressure measuring plate is provided between the top cap and the push plate.

[0010] Furthermore, the strength detection module includes a top plate, which is horizontally arranged above the positioning frame, and one side is connected and fixed to the top of the positioning frame through a column. The top of the casing is open and has a sealing groove. The bottom of the top plate has a sealing frame that matches the top of the casing, and a sealing gasket is provided at the bottom of the sealing frame corresponding to the sealing groove. After the top of the casing abuts against the sealing frame, the sealing gasket and the sealing groove are sealed together.

[0011] Furthermore, the top plate is equipped with an air pump, a detector, a heater, and a fan. The air pump output end is equipped with an air pipe, and the other end of the air pipe is equipped with a pressurizing nozzle. The pressurizing nozzle, the detector probe, the heater heating rod, and the fan blades are respectively installed through the top plate and arranged inside the sealing frame opening.

[0012] Furthermore, it also includes a sliding support module, including a support frame set on the feeding rack, with support rollers rotatably arranged on both sides of the top of the support frame corresponding to the two feeding belts, and multiple support rollers evenly arranged along the front and back, with their tops respectively abutting against the feeding belts.

[0013] The advantages of this invention compared with the prior art are as follows: 1. This invention is equipped with two independent detection modules: a strength detection module and a local pressure module. Both modules can be used to perform local pressure resistance testing, overall pressure resistance testing, and high temperature and high pressure environment simulation strength testing on the positioned shell, thereby determining the strength of the shell. The test results are more representative and verifiable, solving the limitations of a single detection method and improving the accuracy, comprehensiveness, and reliability of strength testing. 2. This invention uses the pressure sensing of the gas inside the battery pack casing to determine the degree of deformation of the casing and hidden cracks, making the deformation effect visible, avoiding the subjectivity of visual observation, and reflecting the flexibility of benign deformation of the casing during the strength test. The strength test results are more accurate and reliable. 3. The present invention is equipped with a positioning and feeding module, and the packaging shell can be limited and positioned in advance by the positioning frame, which makes it more convenient to use and has higher detection efficiency. In addition, after the packaging shell is clamped and positioned by the elastic clamping structure, it moves up and down by the top protection structure. When the packaging shell is clamped, the force is mainly provided by the tension spring, which will not cause deformation or damage due to excessive force, thus affecting the accuracy of its strength detection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 This is a schematic diagram showing the unfolded structure of the present invention.

[0016] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0017] Figure 4 This is a schematic diagram of the positioning and feeding module of the present invention.

[0018] Figure 5 This is a top view of the positioning and feeding module of the present invention.

[0019] Figure 6 This is a schematic diagram of the structure of the top clamping module of the present invention.

[0020] Figure 7 This is a front view of the top clamping module of the present invention.

[0021] Figure 8 This is a schematic diagram of the structure of the partial top-pressure module of the present invention.

[0022] Figure 9 This is a schematic diagram showing the unfolded structure of the top clamping module of the present invention.

[0023] Figure 10 This is a schematic diagram of the strength detection module of the present invention.

[0024] Figure 11 This is a schematic diagram of the sealing frame opening of the present invention.

[0025] Figure 12 This is a cross-sectional view of the strength detection module of the present invention.

[0026] As shown in the figure: 1. Positioning and feeding module; 11. Feeding frame; 12. Feeding roller; 13. Feeding belt; 14. Positioning clip frame; 15. Feeding motor; 2. Sliding support module; 21. Support frame; 22. Support roller; 3. Top clamping module; 31. Positioning frame; 311. Clamping groove; 312. Positioning slide rod; 313. Vertical plate; 314. Feeding groove; 32. Elastic clamping structure; 321. Clamping seat; 322. Tension spring; 323. Lifting seat; 324. Clamping head; 33. Top protection structure; 331. Left and right... 332. Top motor, 333. Sliding seat, 334. Supporting diagonal bar, 4. Local pressing module, 41. Electric push rod, 42. Top cap, 43. Pressure measuring plate, 44. Support, 5. Housing, 51. Sealing groove, 6. Strength testing module, 61. Column, 62. Top plate, 63. Air pump, 631. Air pipe, 632. Pressurizing nozzle, 633. Air valve, 64. Detector, 641. Probe, 65. Heater, 651. Heating rod, 66. Fan, 67. Sealing frame opening, 671. Sealing gasket. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] A positioning fixture for testing battery pack casings, combined with an attached... Figure 1 Appendix Figure 2 Appendix Figure 3 As shown, it includes a positioning and feeding module 1, which is arranged in the front-to-back direction and has an upper clamping module 3 in the middle. The upper clamping module 3 has a strength detection module 6 at the top and a local pressing module 4 at the bottom middle. A sliding support module 2 is provided on the positioning and feeding module 1 corresponding to the upper clamping module 3.

[0029] As described above, after the casing 5 is placed on the positioning and feeding module 1, it is conveyed to the upper clamping module 3 through the positioning and feeding module 1. After being clamped and positioned by the upper clamping module 3 and pushed onto the strength testing module 6, the casing 5 is subjected to local pressure testing through the local pressure module 4 to observe whether it is damaged or significantly deformed under maximum stress. Then, the local pressure module 4 is removed, and the strength testing module 6 is used to inflate the casing 5, creating a high-pressure area inside the casing 5. The overall compressive strength and structural strength of the casing 5 are tested through the gas pressure. After the test, the casing 5 falls back onto the positioning and feeding module 1 through the upper clamping module 3 and is conveyed away.

[0030] Combined with appendix Figure 4 Appendix Figure 12 As shown, the housing 5 is a square box with an open top, and a sealing groove 51 is provided on the top.

[0031] Combined with appendix Figure 3 Appendix Figure 4 Appendix Figure 5 As shown, the positioning and feeding module 1 includes a feeding frame 11 arranged in the front-to-back direction. Feeding rollers 12 are rotatably arranged at both ends of the feeding frame 11. The rotating shaft of one of the feeding rollers 12 is connected to the drive shaft of the feeding motor 15 arranged on the feeding frame 11. A pair of feeding belts 13 are rotatably arranged on the two feeding rollers 12. The two feeding belts 13 are mirror images arranged on both sides of the feeding rollers 12, and multiple positioning frames 14 are evenly arranged on the outer side along the circumference. The positioning frames 14 are arranged corresponding to the bottom corners of the casing 5 and are adapted to the bottom corners of the casing 5.

[0032] Combined with appendix Figure 2 Appendix Figure 3 Appendix Figure 4 As shown, the sliding support module 2 includes a support frame 21 mounted on the feeding frame 11. Support rollers 22 are rotatably mounted on both sides of the top of the support frame 21 corresponding to the two feeding belts 13. Multiple support rollers 22 are evenly arranged along the front and back sides of the inner side of the feeding belts 13, and their tops abut against the feeding belts 13 respectively.

[0033] As described above, the packaging shell 5 is sequentially inserted into the positioning frame 14. After the feeding motor 15 is started, the packaging shell 5 moves with the feeding belt 13 and is sent to the upper clamping module 3 for positioning, clamping and strength testing. During the process, the bottom feeding belt 13 is supported by the support roller 22 to maintain the height and level of the packaging shell 5. After the test is completed, the packaging shell 5 falls back into the corresponding positioning frame 14 through the upper clamping module 3 and leaves with the feeding belt 13.

[0034] Combined with appendix Figure 2 Appendix Figure 6 Appendix Figure 7 Appendix Figure 9 As shown, the upper clamping module 3 includes a positioning frame 31, which is horizontally arranged on the feeding frame 11. A feeding groove 314 is provided on the top corresponding to the positioning feeding module 1. Vertical plates 313 are provided on both sides of the positioning feeding module 1 on the bottom plate. Clamping grooves 311 are respectively provided on the top surfaces of the left and right sides of the feeding groove 314. A positioning slide rod 312 is horizontally arranged between the top of the vertical plate 313 and the two side plates of the positioning frame 31. An elastic clamping structure 32 and an upper protection structure 33 are provided on the positioning slide rod 312.

[0035] Combined with appendix Figure 2 Appendix Figure 6 Appendix Figure 7 Appendix Figure 9As shown, the elastic clamping structure 32 includes a clamping seat 321, which is arranged vertically and slidably mounted on the positioning slide rod 312 at the bottom and slidably mounted in the clamping slide groove 311 at the top. A tension spring 322 is horizontally arranged between one side of the clamping seat 321 and the same side upright plate 313, and a lifting seat 323 is slidably arranged on the other side. A clamping head 324 is provided on the top of the lifting seat 323. The clamping head 324 is an L-shaped frame structure (to reduce the coverage area) and is adapted to the left and right sides of the bottom of the casing 5.

[0036] Combined with appendix Figure 2 Appendix Figure 6 Appendix Figure 7 Appendix Figure 9 As shown, the top protection structure 33 includes left and right rotating screws 331, which are arranged horizontally to the left and right. One end of the screws 331 is rotatably mounted on the positioning frame 31, and the other end is connected to the drive shaft of the top motor 332 mounted on the positioning frame 31. Sliding seats 333 are slidably mounted on the positioning slide rod 312 between the clamping seat 321 and the side plate of the positioning frame 31. The bottom of the two sliding seats 333 is threaded onto the left and right rotating screws 331, and the top of each sliding seat 333 is hinged to a support rod 334. The other end of the support rod 334 is hinged to the bottom of the lifting seat 323 on the same side.

[0037] As described above, the clamping seats 321 on both sides are pulled by the horizontally arranged support rods 334, causing the tension spring 322 to extend. The casing 5 is conveyed into the feeding groove 314 through the positioning feeding module 1 and arranged between the two clamping heads 324. The top motor 332 starts, the left and right rotating screw 331 rotates, driving the two sliding seats 333 to move relative to each other, and the tension spring 322 drives the clamping seats 321 on both sides to move closer, so that the clamping heads 324 on both sides are clamped at the bottom of the casing 5. The clamping heads 324 on both sides abut against the left and right sides and the bottom surface of the casing 5 respectively, and are clamped onto the casing 5 by the tension of the tension spring 322. The left and right rotating screw 331 continues to rotate, the sliding seats 333 on both sides continue to move closer, and the support rods 334 flip up respectively. The lifting seats 323 on both sides drive the clamping heads 324 to slide up, and the casing 5 is lifted up.

[0038] Combined with appendix Figure 3 Appendix Figure 10 Appendix Figure 11 Appendix Figure 12as shown, the strength detection module 6 comprises a top plate 62, which is horizontally arranged directly above the positioning frame 31, and one side of the top plate 62 is connected and fixed to the top of the positioning frame 31 through a stand column 61. The bottom of the top plate 62 is provided with a sealing frame opening 67 adapted to the top of the casing 5, and the bottom of the sealing frame opening 67 is provided with a sealing gasket strip 671 corresponding to the sealing groove 51. The top plate 62 is provided with an air pump 63, a detector 64, a heater 65 and a fan 66. The output end of the air pump 63 is provided with an air pipe 631, the other end of the air pipe 631 is provided with a pressurizing nozzle 632, and the pressurizing nozzle 632 is provided with an air valve 633. The pressurizing nozzle 632, the probe 641 of the detector 64, the heating rod 651 of the heater 65 and the fan blades of the fan 66 are respectively arranged to pass through the top plate 62 and are disposed inside the sealing frame opening 67.

[0039] In the above description, after the casing 5 is lifted up by the upward pushing clamping module 3, the top of the casing 5 abuts against the sealing frame opening 67, so that the sealing gasket strip 671 and the sealing groove 51 are connected and sealed. The air valve 633 is opened and the air pump 63 is started, air is introduced into the casing 5 to increase the air pressure inside the casing 5, and the air pressure inside the casing 5 is detected by the detector 64 to determine the air pressure induction inside the casing 5. When the air pressure inside the casing 5 does not change significantly, the overall strength detection of the casing 5 is qualified. If air leakage occurs, it indicates that the casing 5 is severely deformed under the corresponding pressure and has invisible cracks, which affects its strength requirements, and the overall strength of the casing 5 is insufficient (if air leakage occurs at the beginning, the casing 5 is damaged, and the casing 5 should be replaced for detection). After the detection is completed, in order to improve the representativeness, authenticity and reliability of the detection results, the heater 65 and the fan 66 are turned on, the heating rod 651 heats the internal environment of the casing 5, and the fan 66 stirs the gas inside the casing 5 to make the gas temperature inside the casing 5 more uniform. At the same time, the air pump 63 is turned on again for ventilation to detect the compressive performance of the casing 5 under high temperature and high pressure environment (the high temperature and high pressure environment is more consistent with the battery use environment, and the judgment method is the same as the above strength detection), so as to accurately detect the existing invisible cracks.

[0040] With reference to the accom Figure 3 panying dr Figure 8 awing Figure 9 s, Figure 10 as shown, the local jacking module 4 comprises an electric push rod 41, a support 44 is arranged in the middle of the positioning frame 31, the electric push rod 41 is vertically arranged between the two feeding belts 13, the fixed end of the electric push rod 41 is arranged on the support 44, the telescopic end of the electric push rod 41 is provided with a push plate, the push plate is movably sleeved with a top cap 42, and a pressure measuring plate 43 is arranged between the top cap 42 and the push plate.

[0041] In the above description, the casing 5 is lifted onto the strength detection module 6 by the upper clamping module 3, and the local pressure module 4 performs local strength detection on the casing 5. The electric push rod 41 is controlled to extend, and the top of the cap 42 abuts against the bottom of the casing 5. Under the reaction force, the bottom of the cap 42 squeezes the pressure plate 43. The pressure plate 43 detects the pressure between the cap 42 and the casing 5. After the pressure of the cap 42 on the casing 5 reaches the detection requirement value, the electric push rod 41 is controlled to retract, the cap 42 is removed, and the degree of deformation or damage of the casing 5 is observed. The air pump 63 can be turned on to supply air into the casing 5. The degree of deformation and hidden cracks of the casing 5 can be judged based on whether there is air leakage, thereby improving the detection accuracy.

[0042] In specific implementations of this invention, the contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0043] Working principle of the present invention: The packaging shell 5 is sequentially inserted and fitted into the positioning clamping frame 14. After the feeding motor 15 is started, the packaging shell 5 moves along with the feeding belt 13 and is sent to the jacking clamping module 3 for positioning, clamping and strength detection. During the process, the bottom feeding belt 13 is supported by the support roller 22 to maintain the height and horizontal state of the packaging shell 5. The jacking motor 332 is started, the left-right rotating screw 331 rotates to drive the two sliding seats 333 to move relatively, and the tension spring 322 drives the clamping seats 321 on both sides to approach, so that the clamping heads 324 on both sides are clamped at the bottom of the packaging shell 5. The clamping heads 324 on both sides abut against the left and right sides and the bottom surface of the packaging shell 5 respectively, and are clamped on the packaging shell 5 by the tension force of the tension spring 322. The left-right rotating screw 331 continues to rotate, the sliding seats 333 on both sides continue to approach, the supporting diagonal rods 334 turn upwards respectively, the lifting seats 323 on both sides drive the clamping heads 324 to slide upwards respectively, the packaging shell 5 is jacked up, and after the top abuts against the sealing frame opening 67, the sealing gasket strip 671 is connected and sealed with the sealing groove 51. The electric push rod 41 is controlled to extend, the top of the top cap 42 abuts against the bottom of the packaging shell 5, and under the reaction force, the bottom of the top cap 42 squeezes the pressure measuring plate 43, the pressure between the top cap 42 and the packaging shell 5 is detected by the pressure measuring plate 43. After the pressure of the top cap 42 on the packaging shell 5 reaches the required detection value, the electric push rod 41 is controlled to retract, the top cap 42 is removed, and the degree of deformation or damage of the packaging shell 5 is observed. The air pump 63 can be turned on to deliver air into the packaging shell 5, and the deformation degree, invisible cracks and influence of the packaging shell 5 can be determined according to whether it leaks air, so as to improve the detection accuracy. The overall compressive strength of the packaging shell 5 is detected by the strength detection module 6, the air valve 633 is opened and the air pump 63 is started, air is introduced into the packaging shell 5 to increase the air pressure inside the packaging shell 5, and the air pressure inside the packaging shell 5 is detected by the detector 64 to determine the air pressure inside the packaging shell 5. When the air pressure inside the packaging shell 5 reaches the detection requirement and is stable, the overall strength detection of the packaging shell 5 is qualified. If air leakage occurs and the air pressure drops, it indicates that the packaging shell 5 is severely deformed under the corresponding pressure and has invisible cracks, and the overall strength of the packaging shell 5 is insufficient. After the overall compressive strength detection is completed, the strength detection module 6 performs high-temperature and high-pressure environment simulation strength detection on the packaging shell 5, the heater 65 and the fan 66 are turned on, the heating rod 651 heats the environment inside the packaging shell 5, and the fan 66 stirs the gas inside the packaging shell 5 to make the temperature of the gas inside the packaging shell 5 more uniform. At the same time, the air pump 63 is turned on again for ventilation, the compressive performance of the packaging shell 5 in a high-temperature and high-pressure environment is detected, and the existing invisible cracks are accurately detected. After all the detections are completed, the packaging shell 5 falls back into the corresponding positioning clamping frame 14 through the jacking clamping module 3 and leaves along with the feeding belt 13.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

[0045] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A positioning fixture for detecting battery pack housings, characterized in that, include: The positioning feeding module (1) includes a feeding rack (11) arranged in the front-back direction. A pair of feeding belts (13) are rotatably arranged on the feeding rack (11). The two feeding belts (13) are mirror images of each other, and the housing (5) is inserted into the feeding belts (13). The positioning and feeding module (1) is provided with an upper clamping module (3) in the middle. The upper clamping module (3) includes a positioning frame (31). The positioning frame (31) is arranged horizontally on the feeding frame (11) and a feeding groove (314) is provided on the top corresponding to the positioning and feeding module (1). The bottom plate is provided with upright plates (313) on both sides of the positioning and feeding module (1). A positioning slide rod (312) is arranged horizontally between the top of the upright plate (313) and the two side plates of the positioning frame (31). The positioning slide rod (312) is provided with an elastic clamping structure (32) and an upper protection structure (33). After the shell (5) is clamped and positioned by the elastic clamping structure (32), it moves up and down by the upper protection structure (33). The positioning frame (31) is provided with a strength detection module (6) at the top and a local pressing module (4) at the bottom. After the housing (5) is clamped and positioned by the upper clamping module (3), it is pushed up to the strength detection module (6) for overall strength detection and local strength detection by the local pressing module (4).

2. The positioning fixture for detecting battery pack housings according to claim 1, characterized in that: Multiple positioning frames (14) are evenly arranged around the outer side of the two feeding belts (13). The positioning frames (14) are arranged corresponding to the bottom corners of the casing (5), and the bottom of the casing (5) is inserted into the positioning frame (14).

3. The positioning fixture for detecting battery pack housings according to claim 1, characterized in that: The elastic clamping structure (32) includes a clamping seat (321). A pair of clamping grooves (311) are mirrored on the top surface of the positioning frame (31). The clamping seat (321) is arranged vertically, and its bottom is slidably mounted on the positioning slide rod (312). Its top is slidably mounted in the clamping groove (311). A tension spring (322) is arranged horizontally between one side of the clamping seat (321) and the same side upright plate (313). A lifting seat (323) is slidably mounted on the other side. A clip (324) is provided on the top of the lifting seat (323). The clip (324) is an L-shaped frame structure and is adapted to the bottom left and right sides of the casing (5).

4. A positioning fixture for detecting battery pack housings according to claim 3, characterized in that: The top protection structure (33) includes left and right rotating screws (331), which are arranged horizontally to the left and right. One end of the screws (331) is rotatably mounted on the positioning frame (31), and the other end is connected to the drive shaft of the top motor (332) mounted on the positioning frame (31). Sliding seats (333) are slidably mounted on the positioning slide rod (312) between the clamping seat (321) and the side plate of the positioning frame (31). The bottom of the sliding seats (333) on both sides is threaded onto the left and right rotating screws (331), and the top is hinged to the support rods (334). The other end of the support rods (334) is hinged to the bottom of the lifting seat (323) on the same side.

5. A positioning fixture for detecting battery pack housings according to claim 1, characterized in that: The local top pressure module (4) includes an electric push rod (41), a support (44) is provided in the middle of the positioning frame (31), the electric push rod (41) is vertically arranged between the two feeding belts (13), and the fixed end is set on the support (44), the telescopic end is provided with a push plate, a top cap (42) is movably sleeved on the push plate, and a pressure measuring plate (43) is provided between the top cap (42) and the push plate.

6. A positioning fixture for detecting battery pack housings according to claim 1, characterized in that: The strength testing module (6) includes a top plate (62), which is horizontally arranged above the positioning frame (31) and is connected and fixed to the top of the positioning frame (31) on one side by a column (61). The top of the housing (5) is open and has a sealing groove (51). The bottom of the top plate (62) is provided with a sealing frame (67) that matches the top of the housing (5). The bottom of the sealing frame (67) is provided with a sealing gasket (671) corresponding to the sealing groove (51). After the top of the housing (5) abuts against the sealing frame (67), the sealing gasket (671) and the sealing groove (51) are sealed together.

7. A positioning fixture for detecting battery pack housings according to claim 6, characterized in that: The top plate (62) is equipped with an air pump (63), a detector (64), a heater (65) and a fan (66). The output end of the air pump (63) is equipped with an air pipe (631), and the other end of the air pipe (631) is equipped with a pressurizing nozzle (632). The pressurizing nozzle (632), the probe (641) of the detector (64), the heating rod (651) of the heater (65) and the fan blades of the fan (66) are respectively installed through the top plate (62) and arranged inside the sealing frame opening (67).

8. A positioning fixture for detecting battery pack housings according to claim 1, characterized in that: It also includes a sliding support module (2), which includes a support frame (21) set on the feeding frame (11). Support rollers (22) are rotatably set on both sides of the top of the support frame (21) corresponding to the two feeding belts (13). Multiple support rollers (22) are evenly arranged along the front and back, and their tops abut against the feeding belts (13) respectively.

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