CN216791524U - Helium injection mechanism - Google Patents
Helium injection mechanism Download PDFInfo
- Publication number
- CN216791524U CN216791524U CN202123204179.7U CN202123204179U CN216791524U CN 216791524 U CN216791524 U CN 216791524U CN 202123204179 U CN202123204179 U CN 202123204179U CN 216791524 U CN216791524 U CN 216791524U
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- helium
- helium injection
- hole
- adapter
- cavity
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- 239000001307 helium Substances 0.000 title claims abstract description 131
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 131
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 238000002347 injection Methods 0.000 title claims abstract description 91
- 239000007924 injection Substances 0.000 title claims abstract description 91
- 239000007789 gas Substances 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 9
- 238000005086 pumping Methods 0.000 description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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- Examining Or Testing Airtightness (AREA)
Abstract
The utility model discloses a helium injection mechanism which comprises a helium injection nozzle, a hollow helium injection rod, an adapter, a high vacuum valve and an embedded pipe joint, wherein the high vacuum valve is provided with a gas channel, the two ends of the gas channel are respectively provided with a gas inlet and a gas outlet, the gas inlet and the gas outlet are respectively positioned at the bottom end and the top end of the high vacuum valve, the helium injection nozzle is hermetically installed at the bottom end of the helium injection rod and communicated with the inner cavity of the helium injection rod, one end of the adapter is hermetically installed at the top end of the helium injection rod, the other end of the adapter is hermetically installed in the gas inlet, the inner cavity of the adapter is respectively communicated with the inner cavity of the helium injection rod and the gas channel, one end of the embedded pipe joint is hermetically installed in the gas outlet, and the other end of the embedded pipe joint is used for being tightly butted with a liquid injection hole of a battery to be detected. The utility model has simple structure, reduces the consumption of pipelines, joints and the like, thereby reducing the consumption of helium, has better sealing property and small helium retention space, and is convenient to remove the helium.
Description
Technical Field
The utility model relates to the technical field of battery detection, in particular to a helium injection mechanism.
Background
The shell of the lithium battery is generally composed of a bottom shell formed by punching and a top cover plate welded to the bottom shell, the interior of a finished product of the lithium battery is composed of a positive electrode material, a negative electrode material and liquid electrolyte, and certain pressure can be generated in the charging and discharging processes, so that the requirement of the finished product on the shell tightness is very high, and otherwise, an electrolyte leakage accident can occur. At present, helium is generally adopted to carry out air tightness detection on the lithium battery, helium is required to be injected into the shell of the lithium battery from a liquid injection hole of a top cover plate of the lithium battery in a test, and then the helium detection mechanism is used for detecting whether helium leaks from the shell, so that whether the tightness of the shell is qualified is judged.
The existing helium injection mechanism has the problems of complex structure, more pipelines, large helium consumption, easy helium leakage, difficult helium cleaning and the like, and cannot meet the detection requirement.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the helium injection mechanism provided by the utility model is simple in structure, the consumption of pipelines, joints and the like is reduced, so that the consumption of helium is reduced, the sealing performance can be better ensured, the helium staying space is small, and the helium is more convenient to remove.
The technical scheme adopted by the utility model for solving the technical problem is as follows:
the utility model provides a annotate helium mechanism, is including annotating helium mouth, hollow helium pole, adapter, high vacuum valve and embedded coupling, high vacuum valve has gas passage, gas passage's both ends are air inlet and gas outlet respectively, air inlet and gas outlet are located high vacuum valve's bottom and top respectively, annotate helium mouth seal installation to annotate the bottom of helium pole and with the inner chamber intercommunication of notes helium pole, the one end seal installation of adapter is to annotate the top of helium pole, other end seal installation in the air inlet, the inner chamber of adapter respectively with annotate the inner chamber of helium pole, gas passage intercommunication, the one end seal installation of embedded coupling is to in the gas outlet, the other end is used for closely docking with the notes liquid hole of waiting to detect the battery, the inner chamber of embedded coupling with the gas passage intercommunication.
As preferred technical scheme, still include the vacuum meter, the outer wall of adapter is equipped with the inner chamber intercommunication of mounting hole and adapter, the joint seal of vacuum meter is installed in the mounting hole, and the head that connects stretches into the inner chamber of adapter, the inner chamber of joint and the inner chamber intercommunication of adapter.
The helium filling device further comprises a fixing plate and a guide sleeve, wherein the guide sleeve is movably sleeved on the periphery of the helium filling rod, the fixing plate is provided with a through hole penetrating through the top surface and the bottom surface of the fixing plate, and the guide sleeve is fixedly installed in the through hole.
As a preferable technical scheme, the helium filling device further comprises a helium filling seat and a cover plate which are annularly arranged on the periphery of the helium filling rod, one end of the helium filling seat is fixed to the top surface of the fixing plate, the other end of the helium filling seat is fixed with the cover plate, a first cavity and a second cavity are respectively formed between the inner wall of the helium filling seat, the inner wall of the cover plate and the outer wall of the helium filling rod, buffer springs are arranged in the first cavity and the second cavity, the buffer springs are movably sleeved on the periphery of the helium filling rod, one end of each buffer spring is fixed to a step on the outer wall of the helium filling rod, and the other end of each buffer spring is fixed to the bottom of the second cavity.
As a preferable technical scheme, the top end of the guide sleeve protrudes out of the top surface of the fixing plate, one end of the helium injection seat fixed to the top surface of the fixing plate is provided with an accommodating cavity, the top end of the guide sleeve is accommodated in the accommodating cavity, and the step is in contact with the top surface of the guide sleeve.
As a preferable technical scheme, a first sealing ring is arranged between the outer wall of the guide sleeve and the outer wall of the helium injection rod.
As the preferred technical scheme, the uide bushing is a T form, the perforating hole is a T form hole, the T form includes horizontal portion and perpendicular portion, the T form hole include with horizontal through-hole that the horizontal portion corresponds and with the vertical through-hole that the perpendicular portion corresponds, the internal diameter of horizontal through-hole is greater than the internal diameter of vertical through-hole, form annular space between the bottom of horizontal portion and horizontal through-hole, be equipped with the second sealing washer in the annular space.
The utility model has the beneficial effects that: according to the utility model, the helium injection rod and the high vacuum valve are combined together through the adapter, so that the structure is simplified, the consumption of pipelines, connectors and the like is reduced, the consumption of helium is reduced, the sealing performance can be ensured better, the helium staying space between the helium injection nozzle and the high vacuum valve is small, the helium is convenient to remove, and the residual helium is prevented from overflowing into the battery airtightness detection equipment.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural diagram of a helium injection mechanism according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of the helium injection mechanism shown in fig. 1.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. All technical characteristics in the utility model can be interactively combined on the premise of not conflicting with each other.
Referring to fig. 1 and 2, a helium injection mechanism according to an embodiment of the present invention is mainly applied to a battery airtightness detection apparatus. The helium injection mechanism comprises a helium injection nozzle 12, a hollow helium injection rod 14, an adapter 16, a high vacuum valve 18, an embedded pipe joint 22, a vacuum meter 24, a fixing plate 26, a guide sleeve 28, a helium injection seat 32, a cover plate 34 and a buffer spring 36.
The high vacuum valve 18 has a gas channel 182, and the two ends of the gas channel 182 are respectively a gas inlet and a gas outlet, which are respectively located at the bottom end and the top end of the high vacuum valve 18. The helium filling nozzle 12 is hermetically mounted at the bottom end of the helium filling rod 14 and is communicated with the inner cavity 142 of the helium filling rod 14. The adapter 16 is sealingly mounted at one end to the top end of the helium injection rod 14 and at the other end to the air inlet. The inner cavity 162 of the adapter 16 is respectively communicated with the inner cavity 142 of the helium injection rod 14 and the gas channel 182. One end of the embedded pipe joint 22 is hermetically installed in the air outlet, and the other end is used for being tightly butted with a liquid injection hole of a battery to be detected. The inner cavity 222 of the recessed tube joint 22 is communicated with the gas channel 182, and when the end of the recessed tube joint 22 far away from the high vacuum valve 18 is tightly butted with the liquid injection hole of the battery to be detected, the inner cavity 222 of the recessed tube joint 22 is also communicated with the liquid injection hole of the battery to be detected. In practical application, helium is injected through the helium injection nozzle 12, enters the inner cavity 222 of the embedded pipe joint 22 through the inner cavity 142 of the helium injection rod 14, the inner cavity 162 of the adapter 16 and the gas channel 182 of the high vacuum valve 18, finally enters the interior of the casing of the battery to be detected through the liquid injection hole of the battery to be detected, and then the helium leakage of the casing of the battery to be detected can be detected through the helium detection mechanism. Through the structure, the helium injection rod 14 and the high vacuum valve 18 are combined together through the adapter 16, the structure is simplified, the using amount of pipelines, joints and the like is reduced, the using amount of helium is reduced, the sealing performance can be better ensured, the helium staying space between the helium injection nozzle 12 and the high vacuum valve 18 is small, the helium is more convenient to remove, and the residual helium is prevented from overflowing into the battery air tightness detection equipment.
In this embodiment, the bottom end of the helium injection rod 14 has a first mounting cavity communicated with the inner cavity 142 of the helium injection rod 14, the helium injection nozzle 12 is mounted in the first mounting cavity in a sealing manner, for example, in a threaded connection manner, an interference fit manner, or in a manner of inserting the helium injection nozzle 12 and sleeving a sealing ring around the helium injection nozzle 12, which can be selected according to actual situations.
The two ends of the adapter 16 are respectively formed with a first connecting portion 16a and a second connecting portion 16b, the top end of the helium injection rod 14 is provided with a second mounting cavity communicated with the inner cavity 142 of the helium injection rod 14, the first connecting portion 16a is mounted in the second mounting cavity in a sealing manner, the second connecting portion 16b is mounted in the air inlet in a sealing manner, for example, in a threaded connection manner or in an interference fit manner, or in a manner that the first connecting portion 16a and the second connecting portion 16b are plugged and sealing rings are sleeved on the peripheries of the first connecting portion 16a and the second connecting portion 16b, which can be selected according to actual conditions.
The inserted pipe joint 22 is L-shaped, and one end of the inserted pipe joint 22 is hermetically installed in the air outlet in a manner of screwing and locking nuts, and may be, for example, an interference fit, a manner of inserting and sealing rings, and the like.
The high vacuum valve 18 of this embodiment further has an air pumping channel, one end of the air pumping channel is communicated with the gas channel 182, the other end of the air pumping channel is an air pumping port, the air pumping port is located on one side of the high vacuum valve 18, and the air pumping port is used for being connected with a vacuum pumping mechanism, so that vacuum pumping can be performed before helium gas injection.
The outer wall of the adapter 16 is provided with a mounting hole 164 which is communicated with the inner cavity 162 of the adapter 16, the connector 242 of the vacuum meter 24 is hermetically mounted in the mounting hole 164, the head of the connector 242 extends into the inner cavity 162 of the adapter 16, and the inner cavity of the connector 242 is communicated with the inner cavity 162 of the adapter 16. By arranging the vacuum meter 24 between the high vacuum valve 18 and the helium injection nozzle 12, the effect of monitoring the vacuum degree of helium injection or helium pumping can be achieved, the effect of monitoring whether the high vacuum valve 18 is opened or not can be achieved, and the problem of missed killing caused by helium injection failure due to the fact that the high vacuum valve 18 is not opened due to failure is avoided.
The joint 242 of the vacuum gauge 24 is sealingly mounted in the mounting hole 164 by, for example, a threaded connection, an interference fit, or the like, or a manner of inserting the joint 242 and sleeving the seal ring on the outer periphery of the joint 242 may be selected according to actual circumstances.
The guide bush 28 is movably fitted around the outer periphery of the helium injection rod 14, the fixing plate 26 has a through hole 262 penetrating the top and bottom surfaces thereof, and the guide bush 28 is fixedly fitted into the through hole 262. The helium injection rod 14 can be mounted on the battery airtightness detection device through the guide sleeve 28 and the fixing plate 26.
The helium injection seat 32 and the cover plate 34 are both annularly arranged on the periphery of the helium injection rod 14. One end of the helium injection seat 32 is fixed to the top surface of the fixed plate 26, and the other end is fixed with a cover plate 34. A first cavity 322 and a second cavity 342 are respectively formed between the inner wall of the helium injection seat 32, the inner wall of the cover plate 34 and the outer wall of the helium injection rod 14, a buffer spring 36 is arranged in the first cavity 322 and the second cavity 342, the buffer spring 36 is movably sleeved on the periphery of the helium injection rod 14, one end of the buffer spring 36 is fixed to the step 144 on the outer wall of the helium injection rod 14, and the other end of the buffer spring is fixed to the bottom of the second cavity 342. When the end of the embedded pipe joint 22 far away from the high vacuum valve 18 is pressed to the liquid injection hole of the battery to be detected so as to realize tight butt joint with the liquid injection hole, the arranged buffer spring 36 plays a role in buffering, and the phenomenon that the helium injection nozzle 12 is crushed or the battery to be detected due to overlarge pressure of the helium injection nozzle 12 caused by the battery being overhigh can be avoided.
The top end of the guide sleeve 28 protrudes out of the top surface of the fixing plate 26, one end of the helium injection seat 32 fixed to the top surface of the fixing plate 26 is provided with an accommodating cavity, the top end of the guide sleeve 28 is accommodated in the accommodating cavity, and the step 144 is in contact with the top surface of the guide sleeve 28, so that the downward movement of the helium injection rod 14 can be limited.
A first sealing ring 38 is arranged between the outer wall of the guide sleeve 28 and the outer wall of the helium injection rod 14. The first sealing ring 38 is provided to seal to reduce air from entering between the inner wall of the guide sleeve 28 and the outer wall of the helium injection rod 14 to reduce resistance to movement of the helium injection rod 14.
In this embodiment, there are two first sealing rings 38, and the two first sealing rings 38 correspond to the top end and the bottom end of the guide sleeve 28, respectively. It is understood that the number of the first sealing rings 38 may be other, and may be set according to actual conditions.
In this embodiment, the guiding sleeve 28 is a T-shaped member, the through hole 262 is a T-shaped hole, the T-shaped member includes a horizontal portion 282 and a vertical portion 284, the top end of the horizontal portion 282 protrudes from the top surface of the fixing plate 26, and the bottom end of the horizontal portion 282 is connected to the vertical portion 284. The T-shaped hole includes a transverse through hole 2622 and a vertical through hole 2624 that communicate with each other, the transverse through hole 2622 being formed to the top surface of the fixing plate 26, the vertical through hole 2624 being formed to the bottom surface of the fixing plate 26, the inner diameter of the transverse through hole 2622 being greater than the inner diameter of the vertical through hole 2624. The horizontal portion 282 corresponds to the horizontal through hole 2622, and the vertical portion 284 corresponds to the vertical through hole 2624. An annular space is formed between the transverse part 282 and the bottom of the transverse through hole 2622, and a second sealing ring 42 is arranged in the annular space to play a role in sealing, so that the movement resistance of the helium injection rod 14 can be further reduced.
The bottom surface of the fixing plate 26 is provided with an annular groove, and a third sealing ring 44 is arranged in the annular groove, so that the sealing effect is achieved, and the air tightness between the fixing plate and other parts can be ensured.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (7)
1. A helium injection mechanism is characterized by comprising a helium injection nozzle, a hollow helium injection rod, an adapter, a high vacuum valve and an embedded pipe joint, the high vacuum valve is provided with a gas channel, the two ends of the gas channel are respectively provided with a gas inlet and a gas outlet, the gas inlet and the gas outlet are respectively positioned at the bottom end and the top end of the high vacuum valve, the helium injection nozzle is hermetically arranged at the bottom end of the helium injection rod and is communicated with the inner cavity of the helium injection rod, one end of the adapter is hermetically arranged at the top end of the helium injection rod, the other end of the adapter is hermetically arranged in the air inlet, the inner chamber of adapter respectively with annotate the inner chamber of helium pole, gas passage intercommunication, the one end seal mount of embedded coupling is in the gas outlet, the other end be used for with treat that the notes liquid hole of waiting to detect the battery closely docks, the inner chamber of embedded coupling with gas passage intercommunication.
2. The helium injection mechanism of claim 1, further comprising a vacuum gauge, wherein a mounting hole is formed in an outer wall of the adapter and is communicated with an inner cavity of the adapter, a connector of the vacuum gauge is mounted in the mounting hole in a sealing mode, a head of the connector extends into the inner cavity of the adapter, and the inner cavity of the connector is communicated with the inner cavity of the adapter.
3. The helium injection mechanism according to claim 1, further comprising a fixing plate and a guide sleeve, wherein the guide sleeve is movably sleeved on the periphery of the helium injection rod, the fixing plate is provided with a through hole penetrating through the top surface and the bottom surface of the fixing plate, and the guide sleeve is fixedly installed in the through hole.
4. The helium injection mechanism according to claim 3, further comprising a helium injection seat and a cover plate, wherein the helium injection seat is annularly arranged on the periphery of the helium injection rod, one end of the helium injection seat is fixed to the top surface of the fixing plate, the cover plate is fixed to the other end of the helium injection seat, a first cavity and a second cavity are respectively formed between the inner wall of the helium injection seat, the inner wall of the cover plate and the outer wall of the helium injection rod, a buffer spring is arranged in the first cavity and the second cavity, the buffer spring is movably sleeved on the periphery of the helium injection rod, one end of the buffer spring is fixed to the step on the outer wall of the helium injection rod, and the other end of the buffer spring is fixed to the bottom of the second cavity.
5. The helium injection mechanism as claimed in claim 4, wherein the top end of the guiding sleeve protrudes from the top surface of the fixing plate, the end of the helium injection seat fixed to the top surface of the fixing plate has a receiving cavity, the top end of the guiding sleeve is received in the receiving cavity, and the step is in contact with the top surface of the guiding sleeve.
6. The helium injection mechanism as claimed in claim 3, wherein a first sealing ring is provided between the outer wall of the guide sleeve and the outer wall of the helium injection rod.
7. The helium injection mechanism according to claim 3, wherein the guide sleeve is a T-shaped member, the through hole is a T-shaped hole, the T-shaped member comprises a transverse portion and a vertical portion, the T-shaped hole comprises a transverse through hole corresponding to the transverse portion and a vertical through hole corresponding to the vertical portion, the inner diameter of the transverse through hole is larger than that of the vertical through hole, an annular space is formed between the transverse portion and the bottom of the transverse through hole, and the second sealing ring is arranged in the annular space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123204179.7U CN216791524U (en) | 2021-12-16 | 2021-12-16 | Helium injection mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123204179.7U CN216791524U (en) | 2021-12-16 | 2021-12-16 | Helium injection mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216791524U true CN216791524U (en) | 2022-06-21 |
Family
ID=82008337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123204179.7U Active CN216791524U (en) | 2021-12-16 | 2021-12-16 | Helium injection mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216791524U (en) |
-
2021
- 2021-12-16 CN CN202123204179.7U patent/CN216791524U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240102 Address after: Room 301, Building 4, No. 2, Xinghui Road, Songshanhu Park, Dongguan City, Guangdong Province, 523000 Patentee after: Dongguan Songshanhu Jiatuo Intelligent Equipment Co.,Ltd. Address before: 523000 Room 201, building 1, No. 25, Nantang Road, Chashan Town, Dongguan City, Guangdong Province Patentee before: Dongguan Jiatuo Automation Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |