Air tightness detection device for battery box

Abstract

The invention discloses a battery box airtightness detection device. The device comprises a fixing frame; the rotating frame is arranged on the fixed frame and is used for continuously detecting the air tightness of the battery box; the plurality of mounting parts are arranged on the rotating stand and are used for pressing the battery box; the lifting parts are arranged on the rotating stand, are in one-to-one correspondence with the mounting parts, and are used for lifting the battery box and pressing the battery box in cooperation with the mounting parts; the detection part is arranged at the top of the lifting part and is used for performing partition detection on the battery box; the gas channel is arranged on the rotating stand, is fixedly connected with the mounting part and is used for conveying gas for the battery box and detecting the gas tightness of the battery box; the detection part comprises a detection box and a separation frame arranged in the detection box, the separation frame is matched with the detection box to divide the detection box into a plurality of cavities, and a top frame extending into the separation frame is arranged around the periphery of the detection box. According to the invention, the welding seam detection of the battery box is realized, the leakage position can be accurately detected, and the detection efficiency is improved.

Description

Technical Field

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

[0002] The battery box frame is the main structural part of the battery box, which is generally produced by welding multiple metal brackets. The welded battery box needs to ensure the airtightness of the weld. The battery box airtightness detection is the core link to ensure the safety of the battery system.

[0003] At present, the methods for testing the air tightness of battery boxes are mainly through pressure difference testing, vacuum method and water immersion test method. Among the traditional testing methods, the pressure difference testing method is the most common. The welds of the battery box are prone to air leakage, but during the pressure difference testing process, the battery box can only be tested as a whole, and the specific leaking welds of the battery box cannot be confirmed, which affects the efficiency of the test. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned deficiencies and provide a battery box airtightness detection device to realize weld detection of the battery box, which is conducive to accurately detecting the leakage location and improving the detection efficiency.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a battery box airtightness detection device, comprising: Fixed frame; A rotating frame, mounted on a fixed frame, for continuously testing the air tightness of the battery box; There are multiple mounting parts, which are arranged on the rotating frame and are used to press the battery box; The lifting portion is provided on the rotating frame and corresponds to the mounting portion one-to-one, and is used to lift the battery box and cooperate with the mounting portion to press the battery box; The detection part is arranged on the top of the lifting part and is used for detecting the battery box in different areas; The gas channel is provided on the rotating frame and fixedly connected to the mounting portion, and is used to transport gas to the battery box and detect the air tightness of the battery box; The detection part includes a detection box and a partition frame arranged in the detection box. The partition frame cooperates with the detection box to divide the detection box into multiple chambers. The detection box is provided with a top frame extending to the inside of the partition frame around it. The bottom of the detection box is provided with a pressure plate. A transmission frame is hinged between the pressure plate and the top frame. The partition frame is provided with a pressure difference detector that cooperates with the multiple chambers.

[0006] Furthermore, the transmission frame includes a transmission rod hingedly arranged on the pressure plate; It also includes a U-shaped frame arranged on the detection box, the transmission rod and the U-shaped frame are rotatably arranged, and a torsion spring is arranged between the U-shaped frame and the transmission rod.

[0007] Furthermore, the pressing plate is provided with a pressure rod extending into the detection box.

[0008] Furthermore, the rotating frame includes a rotating drum rotatably arranged on a fixed frame, and the outer wall of the rotating drum is provided with a symmetrical fixed ring frame; The utility model further comprises a driving part arranged on the fixing frame and a gear arranged on the rotating drum, wherein the gear is engaged with the output shaft end of the driving part.

[0009] Furthermore, the mounting portion includes a telescopic rod arranged in a fixed ring frame located above, the outer wall of the telescopic rod is provided with a frame fixedly mounted to the bottom of the fixed ring frame, the bottom of the frame is provided with a pressure plate, and the pressure plate is provided with a mounting tube.

[0010] Furthermore, the gas channel includes a pressure pump provided on the top of the fixed ring frame located above and an annular pipe provided on the outlet pipe of the pressure pump; It also includes a connecting tube which is arranged on the annular tube and corresponds one to one with the telescopic rods, and a conical sealing body is fixedly provided at the bottom of the connecting tube.

[0011] Furthermore, the lifting portion includes a lifting rod disposed in a fixed ring frame located below; The utility model also comprises a support frame arranged on the top of the lifting rod.

[0012] Furthermore, an air intake pipe for injecting gas is provided on the top of the battery box, and the air intake pipe is pressed and installed with the mounting tube.

[0013] Furthermore, it also includes a control part, which is arranged on the rotating drum and is used to detect and control the operation of the rotating frame, the installation part, the lifting part, and the detection part.

[0014] The beneficial effects of the present invention are embodied in: The present invention drives the mounting part and the lifting part to rotate by the rotating frame, which is conducive to continuous battery box testing. Then, the testing part is installed on the frame of the lifting part, and the lifting part cooperates with the mounting part to press and install the battery box on the testing part. Then, gas is injected into the battery box through the gas channel to test the air tightness of the battery box. The battery box is placed on the partition frame of the testing box, and the lifting part cooperates with the mounting part to apply pressure to the battery box. The battery box transmits the pressure to apply pressure to the pressing plate. The pressing plate drives the transmission frame to apply pressure to the top frame. The top frame applies pressure in the partition frame, and the partition frame presses the battery box, which is conducive to pressing and installing the battery box. Then, the partition frame, the battery box and the testing box are divided into multiple cavities for detecting the welds of the battery box. When the battery box leaks, the leaking cavity is detected by the pressure differential detector, and then the position of the leaking weld of the battery box is detected, thereby realizing weld detection of the battery box, which is conducive to accurate detection of the leakage position and improved detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional view of the present invention; Figure 2 A three-dimensional view of the rotating frame of the present invention; Figure 3 A three-dimensional view of the mounting portion and the gas passage of the present invention; Figure 4 A three-dimensional view of the mounting portion of the present invention; Figure 5 is a three-dimensional cross-sectional view of the mounting portion of the present invention; Figure 6 A three-dimensional view of the detection portion of the present invention; Figure 7 is a three-dimensional cross-sectional view of the detection portion of the present invention; Figure 8 A three-dimensional view of the top frame and the transmission frame of the present invention; Figure 9 This is a top view of the detection portion of the present invention; Figure 10 A three-dimensional view of the partition frame of the present invention; Figure 11 It is a three-dimensional view of the support frame of the present invention.

[0016] In the picture: 1. Fixed frame; 2. Rotating frame; 21. Rotating drum; 22. Fixed ring frame; 23. Driving unit; 24. Gear; 3. Mounting portion; 31. Telescopic rod; 32. Frame; 33. Pressing plate; 34. Mounting tube; 4. Lifting unit; 41. Lifting rod; 42. Support frame; 5. Detection unit; 51. Detection box; 52. Top frame; 53. Transmission frame; 531. Transmission rod; 532. U-shaped frame; 54. Pressure plate; 55. Partition frame; 56. Differential pressure detector; 6. Gas channel; 61. Pressure pump; 62. Ring pipe; 63. Connecting pipe; 64. Conical sealing body; 7. Battery box; 8. Control department. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-11 The present invention discloses a battery box airtightness detection device, comprising: The fixed frame 1 and the rotating frame 2 are fixedly installed through rollers. The rotating frame 2 is rotatably arranged on the outer wall of the fixed frame 1. The longitudinal section of the fixed frame 1 is I-shaped. The rotating frame 2 is provided on the fixed frame 1 and is used to continuously detect the air tightness of the battery box 7. The rotating frame 2 drives the battery box 7 to rotate continuously, and detects multiple battery boxes 7 separately, realizing pipeline detection and improving detection efficiency; The mounting parts 3 are multiple and fixedly mounted on the rotating frame 2 to press the battery box 7. The mounting parts 3 are used to press the battery box 7 on the lifting part 4. The mounting parts 3 insert the gas channel 6 into the battery box 7 to inject gas into the battery box 7 and detect the air tightness of the battery box 7. The lifting parts 4 are fixedly mounted on the rotating frame 2 and correspond one to one with the mounting parts 3. They are used to lift the battery box 7 and cooperate with the mounting parts 3 to press the battery box 7. The multiple lifting parts 4 respectively drive the battery box 7 close to the mounting parts 3 and simultaneously install and press the multiple battery boxes 7 to prevent leakage at the joints between the mounting part 3 and the detection part 5, and the gas channel 6 and the detection part 5, so as to achieve separate pressing and installation. The detection part 5 is provided on the top of the lifting part 4 and is used for regional detection of the battery box 7. The detection part 5 is placed on the top of the lifting part 4 and is used for regional detection of the battery box 7 to accurately detect the location of the leaking weld, which is convenient for subsequent improvement and maintenance; The gas channel 6 is fixedly provided on the rotating frame 2 and fixedly connected to the mounting portion 3, and is used to supply gas to the battery box 7 and detect the air tightness of the battery box 7. The gas channel 6 is used to provide high-pressure gas to the battery box 7, which is conducive to improving the detection efficiency of the battery box 7; The detection part 5 includes a detection box 51 and a partition frame 55 arranged in the detection box 51. The detection box 51 is used for sealing the battery box 7. The partition frame 55 is a rubber partition frame 55, which is used to seal the detection box 51 and the battery box 7 in different areas. The partition frame 55 cooperates with the detection box 51 to divide it into multiple chambers. An air inlet pipe is set on the top of the detection box 51. The detection box 51 is provided with a top frame 52 extending to the inside of the partition frame 55 around the four sides. A groove is provided in the partition frame 55 to match the top frame 52. A gap is provided at the connecting angle between the horizontal top frame 52 and the longitudinal top frame 52 to achieve mutual compression. When the horizontal top frame 52 and the longitudinal top frame 52 are pressed together, the gap is compressed. When tight, the angle between the partition frame 55 and the battery box 7 is pressed tightly. A pressure plate 54 is provided at the bottom of the detection box 51. When the battery box 7 is installed in the detection box 51, downward pressure is applied to the pressure plate 54. The pressure plate 54 drives the transmission frame 53 to rotate, and the transmission pressure is transmitted to the top frame 52. The top frame 52 presses and seals the partition frame 55 and the battery box 7. The transmission frame 53 is hinged between the pressure plate 54 and the top frame 52. A pressure differential detector 56 cooperating with multiple chambers is provided on the partition frame 55. The pressure differential detector 56 is used to detect changes in gas pressure in the cavity, which is beneficial to detect the leakage position of different welds of the battery box 7 and improve the efficiency of detection.

[0019] In a specific embodiment, the transmission frame 53 includes a transmission rod 531 hingedly provided on the pressure plate 54. The transmission rod 531 is V-shaped and rotatably connected to the pressure plate 54. There are four transmission frames 53. It also includes a U-shaped frame 532 arranged on the detection box 51, the transmission rod 531 and the U-shaped frame 532 are rotatably arranged, and a torsion spring is provided between the U-shaped frame 532 and the transmission rod 531, the U-shaped frame 532 is used to support the transmission rod 531 for rotation, and the transmission frame 53 is used to transmit the pressure of the pressure plate 54, the transmission frame 53 presses the top plate 52 to move, and the top plate 52 presses the partition frame 55 and the battery box 7 to seal.

[0020] In one embodiment, a pressure rod extending into the detection box 51 is provided on the pressure plate 54. When the battery box 7 is installed in the detection box 51, the detection box 51 presses the pressure rod, which is transmitted to the pressure plate 54 to move the pressure plate 54.

[0021] In a specific embodiment, the rotating frame 2 includes a rotating drum 21 rotatably mounted on the fixed frame 1. The outer wall of the rotating drum 21 is provided with symmetrical fixed ring frames 22. There are two fixed ring frames 22, which are respectively arranged on the upper and lower sides of the rotating drum 21. The rotating drum 21 is used to drive the fixed ring frames 22 to rotate on the fixed frame 1. The fixed ring frames 22 are respectively used to support multiple mounting portions 3. The fixed ring frames 22 are used to support the lifting portions 4, and the lifting portions 4 correspond to the mounting portions 3 in a one-to-one manner. It also includes a driving portion 23 arranged on the fixed frame 1 and a gear 24 arranged on the rotating drum 21. The gear 24 is engaged with the output shaft end of the driving portion 23. The driving portion 23 is an electric motor. The driving portion 21 is used to drive the gear 24 and the rotating drum 21 to rotate on the fixed frame 1. The time required for the rotating drum 21 to rotate one circle on the fixed frame 1 is determined by controlling the speed of the driving portion 21.

[0022] In one embodiment, the mounting portion 3 includes a telescopic rod 31 arranged in a fixed ring frame 22 located above. The telescopic rod 31 is an electric push rod or a pneumatic push rod. The telescopic rod 31 is fixed to the fixed ring frame 22 by flanges and bolts. The outer wall of the telescopic rod 31 is provided with a frame 32 fixedly mounted to the bottom of the fixed ring frame 22. The bottom of the frame 32 is provided with a pressure plate 33, and the pressure plate 33 is provided with a mounting tube 34. The telescopic rod 31 is used to drive the connecting tube 63 to move up and down.

[0023] In a specific embodiment, the gas channel 6 includes a pressure pump 61 provided on the top of the fixed ring frame 22 and an annular tube 62 provided on the outlet pipe of the pressure pump 61. The pressure pump 61 provides air pressure to the annular ring 62. The annular ring 62 is used to connect multiple connecting tubes 63. The connecting tube 63 consists of two L-shaped parts. The connecting section between the connecting tube 63 and the annular tube 62 is a telescopic tube. The connecting tube 63 is provided on the annular tube 62 and corresponds to the telescopic rod 31 one by one. A conical sealing body 64 is fixed on the bottom of the connecting tube 63 and is provided on the outer wall of one end of the connecting tube 63 .

[0024] In one embodiment, the lifting portion 4 includes a lifting rod 41 disposed in the fixed ring frame 22 located below. The lifting rod 41 is an electric push rod or a pneumatic push rod. The lifting rod 41 is fixed to the fixed ring frame 22 by flanges and bolts. The device further includes a support frame 42 disposed on the top of the lifting rod 41 , and the support frame 42 and the pressure plate 54 are movably disposed.

[0025] During use, the lifting rod 41 drives the detection box 51 on the support frame 42 to rise and fall, and the frame 32 near the telescopic rod 31, the pressure plate 33 and the mounting tube 34 on the frame 32 are respectively pressed and installed with the detection box 51 and the air intake pipe, and the telescopic rod 31 drives the connecting tube 63 and the conical sealing body 64 to be inserted into the mounting tube 34 to seal the mounting tube 34, and the pressure pump 61 injects the internal gas of the battery box 7, and the pressure difference detector 56 detects the air pressure in the cavity. After a period of standing, the pressure difference detector 56 continues to detect the air pressure in the cavity, observes the changes in the pressure difference detector 56, and detects different cavities at the same time to achieve different weld detection of the battery box 7.

[0026] In a specific embodiment, an air inlet pipe for injecting gas is provided on the top of the battery box 7 , and the air inlet pipe is pressed and installed with the mounting tube 34 .

[0027] In one embodiment, a control unit 8 is further included, which is arranged on the rotating drum 21 and is used to detect and control the operation of the rotating frame 2, the mounting unit 3, the lifting unit 4, and the detecting unit 5. The control unit 8 is internally provided with a controller and a processor.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] In addition, "plurality" means two or more.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery box airtightness detection device, characterized in that: include: Fixed frame (1); A rotating frame (2) is arranged on the fixed frame (1) and is used to continuously detect the air tightness of the battery box (7); A plurality of mounting portions (3) are provided on the rotating frame (2) to press the battery box (7); The lifting portion (4) is disposed on the rotating frame (2) and corresponds one-to-one with the mounting portion (3), and is used to lift the battery box (7) and cooperate with the mounting portion (3) to press the battery box (7); A detection portion (5) is provided on the top of the lifting portion (4) and is used for performing partition detection on the battery box (7); A gas channel (6) is provided on the rotating frame (2) and is fixedly connected to the mounting portion (3) for conveying gas to the battery box (7) and detecting the air tightness of the battery box (7); The detection part (5) includes a detection box (51) and a partition frame (55) arranged in the detection box (51), the partition frame (55) cooperates with the detection box (51) to divide the detection box into a plurality of chambers, the detection box (51) is provided with a top frame (52) extending to the inside of the partition frame (55) around the four sides, the detection box (51) is provided with a pressure plate (54) at the bottom of the detection box (51), a transmission frame (53) is hinged between the pressure plate (54) and the top frame (52), and a pressure difference detector (56) cooperating with the plurality of chambers is provided on the partition frame (55).

2. The battery box airtightness detection device according to claim 1, characterized in that: The transmission frame (53) includes a transmission rod (531) hingedly arranged on the pressure plate (54); It also includes a U-shaped frame (532) arranged on the detection box (51), the transmission rod (531) and the U-shaped frame (532) are rotatably arranged, and a torsion spring is provided between the U-shaped frame (532) and the transmission rod (531).

3. The battery box airtightness detection device according to claim 1, characterized in that: The pressing plate (54) is provided with a pressing rod extending into the detection box (51).

4. The battery box airtightness detection device according to claim 1, characterized in that: The rotating frame (2) comprises a rotating drum (21) rotatably arranged on the fixed frame (1), and the outer wall of the rotating drum (21) is provided with a symmetrical fixed ring frame (22); It also includes a driving portion (23) arranged on the fixed frame (1) and a gear (24) arranged on the rotating drum (21), wherein the gear (24) is meshed with the output shaft end of the driving portion (23).

5. The battery box airtightness detection device according to claim 4, characterized in that: The mounting portion (3) comprises a telescopic rod (31) arranged in a fixed ring frame (22) located above, an outer wall of the telescopic rod (31) is provided with a frame (32) fixedly mounted to the bottom of the fixed ring frame (22), a pressing plate (33) is provided at the bottom of the frame (32), and a mounting tube (34) is provided on the pressing plate (33).

6. The battery box airtightness detection device according to claim 5, characterized in that: The gas channel (6) includes a pressure pump (61) arranged on the top of the fixed ring frame (22) located above, and an annular pipe (62) arranged on the outlet pipe of the pressure pump (61); It also includes a connecting tube (63) disposed on the annular tube (62) and corresponding one-to-one with the telescopic rod (31), and a conical sealing body (64) is fixedly provided at the bottom of the connecting tube (63).

7. The battery box airtightness detection device according to claim 1, characterized in that: The lifting portion (4) includes a lifting rod (41) arranged in a fixed ring frame (22) located below; It also includes a support frame (42) arranged on the top of the lifting rod (41).

8. The battery box airtightness detection device according to claim 5, characterized in that: An air inlet pipe for injecting gas is provided on the top of the battery box (7), and the air inlet pipe is tightly mounted to the mounting pipe (34).

9. The battery box airtightness detection device according to claim 4, characterized in that: It also includes a control unit (8) disposed on the rotating drum (21) for detecting and controlling the operation of the rotating frame (2), the mounting unit (3), the lifting unit (4), and the detecting unit (5).

Images