CN216433432U - Lithium ion battery sealing performance detection device - Google Patents
Lithium ion battery sealing performance detection device Download PDFInfo
- Publication number
- CN216433432U CN216433432U CN202123127747.8U CN202123127747U CN216433432U CN 216433432 U CN216433432 U CN 216433432U CN 202123127747 U CN202123127747 U CN 202123127747U CN 216433432 U CN216433432 U CN 216433432U
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- China
- Prior art keywords
- ion battery
- lithium ion
- upper cover
- sealing performance
- box
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 69
- 238000007789 sealing Methods 0.000 title claims abstract description 49
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000009434 installation Methods 0.000 claims description 33
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a lithium ion battery sealing performance detection device, including install bin and upper cover. Has the advantages that: the utility model adopts the rapid hydraulic cylinder, the rubber piston and the electronic air pressure meter, when detecting the sealing performance of the aporate lithium-ion battery, the nonporous lithium ion battery can be put into the placing box, the first air cylinder is started to push the upper cover to be tightly propped against the placing box, so that the inside of the placing box presents a sealing structure, the quick hydraulic cylinder can be started to push the piston mounting plate and the rubber piston to move downwards for a certain distance and then stop pushing, thereby rapidly improving the air pressure in the placing box, displaying the pressure value in the placing box by the electronic air pressure meter, standing for a period of time, the sealing performance of the lithium ion battery without holes can be judged by observing the numerical value change condition of the electronic air pressure meter, and compared with the traditional high-pressure inflation detection device, the device pushes the rubber piston to increase air pressure rapidly through the rapid hydraulic cylinder, so that the inflation and deflation processes are omitted, the detection speed is higher, and the detection efficiency is improved.
Description
Technical Field
The utility model relates to a lithium ion battery detects technical field, particularly, relates to a lithium ion battery sealing performance detection device.
Background
The lithium ion battery is a rechargeable battery, it mainly depends on the lithium ion to move between positive pole and negative pole to work, in the course of charging and discharging, the positive lithium ion is inserted and taken off between two electrodes, during charging, the positive lithium ion is taken off from the positive pole, through the electrolyte and inserted into the negative pole, the negative pole is in the state of rich lithium, when discharging, it is opposite, the sealing performance of the lithium ion battery makes the important index of the safety of the lithium ion battery, the traditional detection equipment injects high pressure air into the lithium ion battery or injects high pressure air into the mould, the sealing performance is judged by the pressure change of the high pressure air, the high pressure air pump is needed to complete the charging and discharging process, the detection speed is slow, the structure is complex, the cost is expensive, it can be further improved, at the same time, the equipment for detecting the porous lithium ion battery and the equipment for detecting the non-porous lithium ion battery can not be used together, the detection mode is single, the use function is single, the use is not convenient enough, and the improvement can be further made.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a lithium ion battery sealing performance detection device, possess the advantage that detects fast, efficient, multi-functional, the cost is low to the not enough of prior art, and then solve the problem among the above-mentioned background art.
(II) technical scheme
For realizing the above-mentioned advantage that detects fastly, efficient, multi-functional, the cost is low, the utility model discloses a concrete technical scheme as follows:
a device for detecting the sealing performance of a lithium ion battery comprises an installation box and an upper cover, wherein a bottom plate is fixedly installed on the bottom surface of the installation box, the upper cover is arranged in the installation box, a bracket is welded on the top surface of the upper cover, a quick hydraulic cylinder is fixedly arranged in the bracket, a piston rod of the quick hydraulic cylinder penetrates through the upper cover and is connected with a piston mounting plate, and the outer wall of the piston mounting plate is fixedly connected with a rubber piston which is in interference fit with the inner wall of the upper cover, and a first cylinder is vertically and fixedly connected between the top surface of the upper cover and the inner top surface of the installation box at two sides of the bracket, a placing box is arranged below the upper cover, a sliding block is welded on the bottom surface of the placing box, an electronic air pressure meter is connected on the surface of one side of the placing box in a through way, and the electronic air gauge penetrates through the side wall of the installation box, the top surface of the bottom plate is welded with a rail, and the sliding block is inserted into the rail and is in sliding connection with the rail.
Further, the bottom plate top surface is located the welding of install bin opposite side and has the sleeve, and the sleeve top surface runs through threaded connection and have the screw rod to the screw rod top surface rotates through swivelling joint seat and is connected with the lifter plate, the horizontal fixedly connected with second cylinder of cylinder mount pad is passed through to lifter plate top surface one end, and the piston rod other end fixedly connected with push pedal of second cylinder, it has the outlet duct to place box opposite side surface through connection, and the fixed cup joint of the outlet duct other end has stifled ring to stifled ring opposite side surface fixedly connected with seals the backing ring, outlet duct surface mounting has the valve, and the outlet duct runs through install bin opposite side surface, vertical installation has the direction telescopic link between lifter plate and the bottom plate.
Further, a controller is fixedly mounted on the surface of one side of the mounting box, and the output end of the controller is electrically connected with the first air cylinder and the quick hydraulic cylinder.
Furthermore, the bottom surface of the upper cover is provided with a slot, the inner wall of the slot is adhered with a rubber pad, and the top surface of the placing box is provided with an inserting ring corresponding to the position under the slot.
Furthermore, a through groove for the movement of the installation pipe of the electronic air pressure meter is formed in the surface of one side of the installation box, and a through groove for the movement of the air outlet pipe is formed in the surface of the other side of the installation box.
Furthermore, the vertical welding of upper cover top surface has the guide bar, and the guide bar runs through the install bin and with install bin sliding connection.
(III) advantageous effects
Compared with the prior art, the utility model provides a lithium ion battery sealing performance detection device possesses following beneficial effect:
(1) the utility model adopts the quick hydraulic cylinder, the rubber piston and the electronic air pressure gauge, when the sealing performance of the aporate lithium ion battery is detected, the aporate lithium ion battery can be put into the placing box, then the first cylinder is started to push the upper cover to be tightly propped against the placing box, so that the interior of the placing box presents a sealing structure, then the quick hydraulic cylinder can be started to push the piston mounting plate and the rubber piston to move downwards for a certain distance and stop pushing, thereby quickly improving the air pressure in the placing box, at the moment, the electronic air pressure gauge displays the pressure value in the placing box, after one-time standing, the sealing performance of the aporate lithium ion battery can be judged by observing the numerical value change condition of the electronic air pressure gauge, compared with the traditional high-pressure inflation detection equipment, the device pushes the rubber piston to quickly increase the air pressure through the quick hydraulic cylinder, the inflation and deflation process is omitted, the detection speed is faster, therefore, the detection efficiency is improved, and meanwhile, the structure is simpler and the cost is lower.
(2) The utility model adopts the outlet pipe and the push plate, when detecting the porous lithium ion battery, the porous lithium ion battery can be put on the top surface of the lifting plate, the lifting plate is pushed to lift by rotating the screw rod, thereby the sealing gasket ring is aligned to the air inlet hole of the porous lithium ion battery, namely, the push plate is driven to push the air inlet hole of the lithium ion battery to abut against the sealing gasket ring by the extension of the second air cylinder, the air inlet hole is sealed, the air pressure inside the placing box can be increased by the extension of the quick hydraulic cylinder, because the outlet pipe is communicated with the placing box, and the outlet pipe is communicated with the porous lithium ion battery, therefore, the air pressure inside the placing box is equal to the air pressure inside the porous lithium ion battery, after one-end time standing, the sealing performance of the porous lithium ion battery can be detected by observing the numerical value change of the electronic air pressure gauge, thereby the device is suitable for the sealing performance detection of the non-porous lithium ion battery, the method is also suitable for detecting the sealing performance of the porous lithium ion battery, and the use functions are more abundant and diversified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a device for detecting sealing performance of a lithium ion battery provided by the present invention;
fig. 2 is a front view of a lithium ion battery sealing performance detection device provided by the present invention;
fig. 3 is a side view of a lithium ion battery sealing performance detection apparatus provided by the present invention;
fig. 4 is a schematic structural view of the air outlet pipe provided by the present invention.
In the figure:
1. installing a box; 2. an upper cover; 3. placing the box; 4. a piston mounting plate; 5. a rubber piston; 6. a support; 7. a fast hydraulic cylinder; 8. a first cylinder; 9. a guide bar; 10. a controller; 11. an electronic air pressure gauge; 12. a slider; 13. a track; 14. a base plate; 15. an air outlet pipe; 16. a valve; 17. plugging a ring; 18. a slot; 19. inserting a ring; 20. a rubber pad; 21. a lifting plate; 22. a screw; 23. guiding the telescopic rod; 24. a sleeve; 25. pushing the plate; 26. a second cylinder; 27. a cylinder mounting seat; 28. and a gasket ring.
Detailed Description
For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.
According to the utility model discloses an embodiment provides a lithium ion battery sealing performance detection device.
Referring to the drawings and the detailed description, the invention will be further described, as shown in fig. 1-4, a lithium ion battery sealing performance testing device according to an embodiment of the invention comprises an installation box 1 and an upper cover 2, a bottom plate 14 is fixedly installed on the bottom surface of the installation box 1, the upper cover 2 is arranged inside the installation box 1, a bracket 6 is welded on the top surface of the upper cover 2, a quick hydraulic cylinder 7 is fixedly installed inside the bracket 6, a piston rod of the quick hydraulic cylinder 7 penetrates through the upper cover 2 to be connected with a piston mounting plate 4, a rubber piston 5 is fixedly connected on the outer wall of the piston mounting plate 4, the rubber piston 5 is in interference fit with the inner wall of the upper cover 2 to avoid air leakage, a first air cylinder 8 is vertically and fixedly connected between the top surface of the upper cover 2 and the inner top surface of the installation box 1 and positioned at two sides of the bracket 6, two ends of the first air cylinder 8 are respectively fixedly connected with the upper cover 2 and the inner top surface of the installation box 1, and a placing box 3 is arranged below the upper cover 2, the size of the cross section of the placing box 3 is the same as that of the cross section of the upper cover 2, a sliding block 12 is welded on the bottom surface of the placing box 3, an electronic air pressure gauge 11 is connected on one side surface of the placing box 3 in a penetrating way, the electronic air pressure gauge 11 penetrates through the side wall of the installation box 1, a rail 13 is welded on the top surface of a bottom plate 14, the sliding block 12 is inserted into the rail 13 and is in sliding connection with the rail 13, when the sealing performance of the aporate lithium ion battery is detected, the aporate lithium ion battery can be placed into the placing box 3, then, a first air cylinder 8 is started to push the upper cover 2 and the placing box 3 to be tightly pressed, so that the inside of the placing box 3 is in a sealing structure, then a quick hydraulic cylinder 7 can be started to push a piston mounting plate 4 and a rubber piston 5 to move downwards for a certain distance and then stop pushing, thereby quickly improving the air pressure inside the placing box 3, at the moment, the electronic air pressure gauge 11 displays the pressure inside the placing box 3, after a period of time, observe the 11 numerical value changes of electron air gauge and can judge aporate lithium ion battery's sealing performance, for traditional high pressure inflation check out test set, this device promotes rubber piston 5 through quick pneumatic cylinder 7 and increases atmospheric pressure fast, has saved the process of filling the gassing, and detection speed is faster to improved detection efficiency, simultaneously, the structure is also simpler, and the cost is also cheaper.
In one embodiment, a sleeve 24 is welded on the other side of the installation box 1 on the top surface of the bottom plate 14, a screw 22 is connected to the top surface of the sleeve 24 through a thread, a lifting plate 21 is rotatably connected to the top surface of the screw 22 through a rotary connecting seat, a handle is welded on the surface of the screw 22 for facilitating the rotation of the screw 22, one end of the top surface of the lifting plate 21 is transversely and fixedly connected with a second cylinder 26 through a cylinder installation seat 27, the other end of a piston rod of the second cylinder 26 is fixedly connected with a push plate 25, an air outlet pipe 15 is connected to the other side surface of the placement box 3 through a through hole, a blocking ring 17 is fixedly sleeved on the other end of the air outlet pipe 15, a sealing gasket ring 28 is fixedly connected to the other side surface of the blocking ring 17 for tightly abutting against the lithium ion battery to seal the air inlet hole, a valve 16 is installed on the surface of the air outlet pipe 15 for facilitating the opening and closing, the air outlet pipe 15 penetrates through the other side surface of the installation box 1, a guiding telescopic rod 23 is vertically installed between the lifting plate 21 and the bottom plate 14, the plurality of guiding telescopic rods 23 are arranged, two ends of each guiding telescopic rod 23 are respectively fixedly connected with the bottom surface of the lifting plate 21 and the top surface of the bottom plate 14, each guiding telescopic rod 23 is a metal rod piece which can be freely stretched and retracted, when a porous lithium ion battery is detected, the porous lithium ion battery can be placed on the top surface of the lifting plate 21, the lifting plate 21 is pushed to lift by rotating the screw rod 22, so that the sealing gasket ring 28 is aligned with the air inlet hole of the porous lithium ion battery, the push plate 25 can be driven by extending the second air cylinder 26 to push the air inlet hole of the lithium ion battery to be abutted against the sealing gasket ring 28, the air inlet hole is sealed, the air inside the placing box 3 can be pressurized by extending the quick hydraulic cylinder 7, the air outlet pipe 15 is communicated with the placing box 3, and the air outlet pipe 15 is communicated with the porous lithium ion battery, therefore, the air pressure inside the placing box 3 is equal to the air pressure inside the porous lithium ion battery, and after the placing box is placed for a period of time, the sealing performance of the porous lithium ion battery can be detected by observing the numerical value change condition of the electronic air gauge 11, so that the device is suitable for detecting the sealing performance of the non-porous lithium ion battery and the porous lithium ion battery, and the using functions are richer and more diversified.
In one embodiment, a controller 10 is fixedly installed on one side surface of the installation box 1, and an output end of the controller 10 is electrically connected with the first cylinder 8 and the quick hydraulic cylinder 7, and an output end of the controller 10 is also electrically connected with an input end of the second cylinder 26.
In one embodiment, the bottom surface of the upper cover 2 is provided with a slot 18, a rubber pad 20 is adhered to the inner wall of the slot 18, the top surface of the placing box 3 is provided with an insert ring 19 corresponding to the position right below the slot 18, and the insert ring 19 is inserted into the slot 18 to press the rubber pad 20 during the closing process of the upper cover 2, so that the sealing effect is achieved.
In one embodiment, a through groove for moving the installation pipe of the electronic air pressure gauge 11 is formed in the surface of one side of the installation box 1, and a through groove for moving the air outlet pipe 15 is formed in the surface of the other side of the installation box 1, so that a worker can pull out the placing box 3 when installing the non-porous lithium ion battery, and the through groove facilitates the electronic air pressure gauge 11 and the air outlet pipe 15 to move together when pulling out the placing box 3.
In one embodiment, the top surface of the upper cover 2 is vertically welded with a guide rod 9, and the guide rod 9 penetrates through the installation box 1 and is slidably connected with the installation box 1 to guide the movement of the upper cover 2, so that the upper cover 2 can stably move up and down.
The working principle is as follows:
when the sealing performance of the nonporous lithium ion battery is detected, the nonporous lithium ion battery can be placed into the placing box 3, then the first air cylinder 8 is started to push the upper cover 2 to be tightly propped against the placing box 3, so that the inside of the placing box 3 presents a sealing structure, then the quick hydraulic cylinder 7 can be started to push the piston mounting plate 4 and the rubber piston 5 to move downwards for a certain distance and stop pushing, thereby quickly improving the air pressure inside the placing box 3, at the moment, the electronic air pressure gauge 11 displays the pressure value inside the placing box 3, after standing for a period of time, the sealing performance of the nonporous lithium ion battery can be judged by observing the numerical value change condition of the electronic air pressure gauge 11, compared with the traditional high-pressure inflation detection equipment, the device pushes the rubber piston 5 to quickly increase the air pressure through the quick hydraulic cylinder 7, the air charging and discharging process is omitted, the detection speed is higher, thereby the detection efficiency is improved, and simultaneously, the structure is simpler, the cost is lower, meanwhile, when detecting the porous lithium ion battery, the porous lithium ion battery can be placed on the top surface of the lifting plate 21, the lifting plate 21 is pushed to lift by rotating the screw rod 22, so that the sealing gasket ring 28 is aligned to the air inlet hole of the porous lithium ion battery, the push plate 25 can be driven by the extension of the second air cylinder 26 to push the air inlet hole of the lithium ion battery to abut against the sealing gasket ring 28, the air inlet hole is sealed, the air in the placing box 3 can be pressurized by the extension of the quick hydraulic cylinder 7, because the air outlet pipe 15 is communicated with the placing box 3 and the air outlet pipe 15 is communicated with the porous lithium ion battery, therefore, the air pressure in the placing box 3 is equal to the air pressure in the porous lithium ion battery, after standing for one end, the sealing performance of the porous lithium ion battery can be detected by observing the numerical change condition of the electronic air pressure meter 11, thereby the device is suitable for detecting the sealing performance of the non-porous lithium ion battery, the method is also suitable for detecting the sealing performance of the porous lithium ion battery, and the use functions are more abundant and diversified.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The lithium ion battery sealing performance detection device is characterized by comprising an installation box (1) and an upper cover (2), wherein a bottom plate (14) is fixedly installed on the bottom surface of the installation box (1), the upper cover (2) is arranged inside the installation box (1), a support (6) is welded on the top surface of the upper cover (2), a quick hydraulic cylinder (7) is fixedly installed inside the support (6), a piston rod of the quick hydraulic cylinder (7) penetrates through the upper cover (2) to be connected with a piston mounting plate (4), a rubber piston (5) is fixedly connected on the outer wall of the piston mounting plate (4), the rubber piston (5) is in interference fit with the inner wall of the upper cover (2), a first cylinder (8) is vertically and fixedly connected on two sides of the support (6) between the top surface of the upper cover (2) and the inner top surface of the installation box (1), and a placement box (3) is arranged below the upper cover (2), the welding of placing box (3) bottom surface has slider (12), and places box (3) one side surface through connection and have electron air gauge (11) to electron air gauge (11) run through install bin (1) lateral wall, bottom plate (14) top surface welding has track (13), slider (12) insert in track (13) and with track (13) sliding connection.
2. The lithium ion battery sealing performance detection device according to claim 1, characterized in that a sleeve (24) is welded on the top surface of the bottom plate (14) on the other side of the installation box (1), a screw rod (22) is connected on the top surface of the sleeve (24) in a penetrating and threaded manner, a lifting plate (21) is rotatably connected on the top surface of the screw rod (22) through a rotating connection seat, one end of the top surface of the lifting plate (21) is transversely and fixedly connected with a second cylinder (26) through a cylinder installation seat (27), the other end of a piston rod of the second cylinder (26) is fixedly connected with a push plate (25), an air outlet pipe (15) is connected on the other side surface of the placement box (3) in a penetrating manner, a blocking ring (17) is fixedly sleeved on the other end of the air outlet pipe (15), a sealing gasket ring (28) is fixedly connected on the other side surface of the blocking ring (17), and a valve (16) is installed on the surface of the air outlet pipe (15), and the air outlet pipe (15) penetrates through the other side surface of the installation box (1), and a guide telescopic rod (23) is vertically arranged between the lifting plate (21) and the bottom plate (14).
3. The lithium ion battery sealing performance detection device according to claim 1, wherein a controller (10) is fixedly mounted on a surface of one side of the mounting box (1), and an output end of the controller (10) is electrically connected with the first cylinder (8) and the fast hydraulic cylinder (7).
4. The device for detecting the sealing performance of the lithium ion battery according to claim 1, wherein a slot (18) is formed in the bottom surface of the upper cover (2), a rubber pad (20) is adhered to the inner wall of the slot (18), and an insert ring (19) is formed on the top surface of the placing box (3) and is located right below the slot (18).
5. The lithium ion battery sealing performance detection device according to claim 2, wherein a through groove for moving the mounting pipe of the electronic air gauge (11) is formed in one side surface of the mounting box (1), and a through groove for moving the air outlet pipe (15) is formed in the other side surface of the mounting box (1).
6. The lithium ion battery sealing performance detection device according to claim 1, wherein a guide rod (9) is vertically welded on the top surface of the upper cover (2), and the guide rod (9) penetrates through the installation box (1) and is connected with the installation box (1) in a sliding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123127747.8U CN216433432U (en) | 2021-12-13 | 2021-12-13 | Lithium ion battery sealing performance detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123127747.8U CN216433432U (en) | 2021-12-13 | 2021-12-13 | Lithium ion battery sealing performance detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216433432U true CN216433432U (en) | 2022-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123127747.8U Expired - Fee Related CN216433432U (en) | 2021-12-13 | 2021-12-13 | Lithium ion battery sealing performance detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216433432U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118464324A (en) * | 2024-07-09 | 2024-08-09 | 大连亚明汽车部件股份有限公司 | Test pressure control method for driver shell sealing test |
-
2021
- 2021-12-13 CN CN202123127747.8U patent/CN216433432U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118464324A (en) * | 2024-07-09 | 2024-08-09 | 大连亚明汽车部件股份有限公司 | Test pressure control method for driver shell sealing test |
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