CN212907884U - Sealing device for lithium battery production - Google Patents
Sealing device for lithium battery production Download PDFInfo
- Publication number
- CN212907884U CN212907884U CN202022256997.0U CN202022256997U CN212907884U CN 212907884 U CN212907884 U CN 212907884U CN 202022256997 U CN202022256997 U CN 202022256997U CN 212907884 U CN212907884 U CN 212907884U
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- spring
- liquid injection
- cover
- knob
- compact heap
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a closing device is used in lithium cell production belongs to lithium cell technical field, and its technical scheme main points are, including apron, sealing washer, compact heap, pressure spring, extension spring and knob, be equipped with the notes cistern in the middle of the apron, annotate the cistern bottom and seted up one and annotate the liquid mouth, sealing washer top end fixed connection compact heap bottom, sealing washer bottom are equipped with an arch, and the knob is equipped with the compression spring through revolving the cover screw in notes cistern to bottom, revolves the cover endotheca, and the cover top is revolved in the connection of pressure spring one end, and the compact heap top is connected to the other end, and extension spring one end fixed connection is at the cover terminal surface that revolves, and other end fixed connection compact heap is sealed through this kind of pressure type, and not only the leakproofness is good, can realize automatic and initiatively exhaust, also can guarantee its.
Description
Technical Field
The utility model belongs to the technical field of the lithium cell technique and specifically relates to a closing device of lithium cell production usefulness is related to.
Background
Lithium batteries refer to batteries that contain lithium (including metallic lithium, lithium alloys and lithium ions, lithium polymers) in an electrochemical system. Lithium batteries can be broadly classified into two types: lithium metal batteries and lithium ion batteries. Lithium metal batteries are generally non-rechargeable and contain lithium in a metallic state. Lithium ion batteries do not contain lithium in the metallic state and are rechargeable.
A lithium ion battery is a battery that functions by relying on lithium ions inside and electrons outside to move between a positive electrode and a negative electrode. The positive electrode of a lithium ion battery is generally made by coating a lithium-containing compound (such as a lithium transition metal oxide) on a metal aluminum foil, and the negative electrode is generally made by coating graphite on a metal copper foil. The energy density of the lithium ion battery is high, and the lithium ion battery can be recycled.
Lithium ion batteries generally consist of a positive electrode, a negative electrode, a separator, an electrolyte and an outer package. The sealing technology in the production lithium ion battery adopts the plug to seal for the battery at present mostly, inserts through the plug after annotating liquid completion promptly and annotates the liquid mouth and seal, and extracts the exhaust with the plug before becoming again, and it is sealed to become to insert the liquid mouth of annotating with the plug after becoming again, annotates the liquid mouth and pulls out a lot of through the plug and insert the leakproofness variation that probably leads to sealing the department, influences the performance and the life of later stage lithium cell, the potential safety hazard still can appear. The sealed solution of pressure type has also been proposed to current technical scheme, realizes annotating the gaseous emission that opening of liquid mouth will produce through pressing, but the setting of its button is unstable at the in-process of depositing and transporting, if pressed the button in the use, it annotates the liquid mouth and will be opened, and oxygen in the air can enter into the inside oxidation that takes place of battery to influence the performance and the life of battery, also cause certain potential safety hazard.
In view of the above, it is desirable to provide a sealing device for lithium ion battery, which has good sealing performance, can automatically and actively exhaust air, and is safe and stable for storage and transportation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a lithium ion battery closing device that the leakproofness is good, ability self-bleeding and store transportation safety and stability is provided to the not enough of prior art existence.
The utility model discloses an above-mentioned technical purpose can be realized through following technical scheme during: a sealing device for lithium battery production comprises a cover plate, a sealing ring, a pressing block, a pressing spring, a tension spring and a knob, and is characterized in that the liquid injection groove is arranged in the middle of the cover plate, a liquid injection port is formed in the bottom of the liquid injection groove, internal threads are formed in the inner wall of the liquid injection groove, the knob comprises a screw cap and a screw sleeve, an exhaust hole is formed in the center of the screw cap, and external threads corresponding to the internal threads of the liquid injection groove are formed in the outer wall of the screw sleeve;
the improved structure of the liquid injection tank is characterized in that the top end of the sealing ring is fixedly connected with the bottom end of the pressing block, a bulge is arranged at the bottom end of the sealing ring, the knob is screwed into the liquid injection tank to the bottom end through a rotary sleeve, a pressing spring is sleeved in the rotary sleeve, one end of the pressing spring is connected with the top end of the rotary sleeve, the other end of the pressing spring is connected with the top end of the pressing block, one end of the tension spring is fixedly connected with the.
Furthermore, the extension springs are at least three and evenly arranged around the pressing block to ensure that the pressing block is evenly stressed.
Furthermore, under the same condition, the stiffness coefficient of the tension spring is greater than that of the compression spring, so that the sealing device for lithium battery production can realize automatic exhaust of the device and also can realize passive exhaust of human intervention.
Further, the top end of the compression block is set to be a convex surface, the diameter of the compression block is larger than the inner diameter of the rotary sleeve, and the situation that the inner cavity of the rotary sleeve is blocked by the compression block to cause exhaust failure is prevented.
To sum up, the utility model discloses beneficial effect has once:
this kind of closing device for lithium cell production is sealed to sealing washer pressure type through pressure spring and compact heap, and it is good to provide a leakproofness, can realize automatic and initiative exhaust, and the bellied setting of sealing washer is required inside atmospheric pressure when reducing the exhaust, and the setting of knob can drive the sealing washer through the extension spring and rise the exhaust, and also can guarantee the safety and the stability of lithium cell when the storage is transported after the knob is screwed.
Drawings
Fig. 1 is a schematic view of the overall cross-sectional structure of the present invention.
In the figure: 1. a cover plate; 101. a liquid injection port; 102. a liquid injection groove; 2. a seal ring; 201. a protrusion; 3. a compression block; 4. a compression spring; 5. a tension spring; 6. a knob; 601. screwing the cap; 602. screwing a sleeve; 603. and (4) exhausting holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a sealing device for lithium battery production includes a cover plate 1, a sealing ring 2, a pressing block 3, a pressing spring 4, a tension spring 5 and a knob 6, the improved liquid injection device is characterized in that a liquid injection groove 102 is formed in the middle of the cover plate 1, a liquid injection port 101 is formed in the bottom of the liquid injection groove 102, an internal thread is formed in the inner wall of the liquid injection groove 102, the knob 6 comprises a rotating cap 601 and a rotating sleeve 602, an exhaust hole 603 is formed in the center of the rotating cap 601, an external thread corresponding to the internal thread of the liquid injection groove 102 is formed in the outer wall of the rotating sleeve 602, the top end of the sealing ring 2 is fixedly connected with the bottom end of the pressing block 3, a protrusion 201 is formed in the bottom end of the sealing ring 2, the knob 6 is screwed into the liquid injection groove 102 through the rotating sleeve 602 to the bottom end, a compression spring 4 is sleeved in the rotating sleeve 602, one end of the compression spring 4 is connected with the.
This kind of closing device theory of operation for lithium cell production utilizes the self weight of compact heap 3 and pressure that pressure spring 4 was to compact heap 3 to seal up 2 seal ring, the battery is because produce gas in the use, its inside atmospheric pressure can crescent, because pressure spring 4 has elasticity, will compress pressure spring 4 after the pressure to seal ring 2 is greater than the gravity of compact heap 3 and pressure spring 4's elasticity inside the battery, sealing washer 2 upwards displacement, annotate liquid mouth 101 and be opened exhaust gas, the inside atmospheric pressure of battery reduces, can prevent the condition that the battery explodes effectively. And 5 one end of extension spring fixedly connected revolves the setting of cover 602 other end fixed connection compact heap 3, and extension spring 5 can be stretched in the rising of knob 6, and when the power of tensile extension spring 5 was greater than compact heap 3 self gravity and hold-down spring 4 elasticity, extension spring 5 will drive compact heap 3 upwards displacement, and sealing washer 2 upwards displacement is annotated liquid mouth 101 and is opened exhaust, reaches initiative carminative function.
Through the technical scheme, after the lithium battery finishes primary liquid injection through the liquid injection port 101, the liquid injection port 101 needs to be sealed, and the purpose is to prevent dust pollution and enhance the infiltration effect, when the sealing device for lithium battery production is used, after the knob 6 is screwed, the compression spring 4 is contracted, the rotary sleeve 602 connected with one end of the compression spring 4 is fixed, the other end of the compression spring 4 can apply downward force, namely, the compression block 3 and the sealing ring 2 fixedly connected with the compression block 3 are compressed at the bottom of the liquid injection groove 102, so that the liquid injection port 101 is sealed and can bear certain air pressure; and become the step or in the use, the inside reaction of taking place of lithium cell can produce gas, and when the inside atmospheric pressure of lithium cell was too big, the pressure that atmospheric pressure produced can drive sealing washer 2 and compact heap 3 upward movement so that pressure spring 4 contracts, thereby open and annotate liquid mouth 101, with the inside gas outgoing of lithium cell, thereby avoided lithium ion battery because the inside atmospheric pressure of battery is too big and produce the risk of explosion, the security and the stability that the lithium cell used have been improved, this kind of exhaust mode is that this utility model discloses the structure is automatic to be realized.
In the production stage, after formation, the liquid injection port 101 needs to be actively opened to discharge gas generated in the lithium battery during formation, at the moment, the knob 6 needs to be rotated anticlockwise, the knob 6 drives the rotary sleeve 602 to move upwards, the tension spring 5 connected to the rotary sleeve 602 bends and stretches around the compression block 3, when the tension spring 5 is stretched to the maximum deformation, the knob 6 can drive the compression block 3 and the sealing ring 2 to move upwards, thereby opening the liquid injection port 101 to actively discharge the gas in the lithium battery, if the quality of the electrolyte in the lithium battery after formation reaches the standard, only opening the liquid injection port 101 again to discharge the gas, if the electrolyte in the lithium battery after formation does not need to be supplemented enough, the knob 6, the hold-down spring 4, the hold-down block 3 and the sealing ring 2 need to be completely disassembled, and then the secondary injection is completed and then the secondary injection is installed again, the sealing device still has good sealing performance without affecting the sealing performance of the liquid filling opening 101.
This kind of closing device for lithium battery production adopts to have screwed knob 6 and 1 cooperation installations of apron, only through 6 the ability that can make of anticlockwise rotation knob and annotate liquid mouth 101 and open, consequently storage after the production, the leakproofness of lithium cell can both be guaranteed in transportation and the use, prevent to annotate liquid mouth 101 and opened the inside part that gets into air oxidation lithium cell to cause lithium cell performance to reduce, life reduces, has guaranteed the safety and the stability of lithium cell.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (4)
1. The sealing device for the lithium battery production comprises a cover plate (1), a sealing ring (2), a pressing block (3), a pressing spring (4), a tension spring (5) and a knob (6), and is characterized in that a liquid injection groove (102) is arranged in the middle of the cover plate (1), a liquid injection port (101) is formed in the bottom of the liquid injection groove (102), internal threads are formed in the inner wall of the liquid injection groove (102), the knob (6) comprises a screw cap (601) and a screw sleeve (602), an exhaust hole (603) is formed in the center of the screw cap (601), and external threads corresponding to the internal threads of the liquid injection groove (102) are formed in the outer wall of the screw sleeve (602);
sealing washer (2) top fixed connection compact heap (3) bottom, sealing washer (2) bottom is equipped with one arch (201), knob (6) are to the bottommost in cover (602) screw in notes cistern (102) through revolving, it is equipped with pressure spring (4) to revolve cover (602) endotheca, cover (602) top is revolved in pressure spring (4) one end connection, and compact heap (3) top is connected to the other end, extension spring (5) one end fixed connection is at cover (602) terminal surface soon, other end fixed connection compact heap (3).
2. The sealing device for lithium battery production as claimed in claim 1, wherein the number of the tension springs (5) is at least three and the tension springs are uniformly arranged around the pressing block (3).
3. The sealing device for lithium battery production as claimed in claim 1, wherein the stiffness coefficient of the tension spring (5) is greater than the stiffness coefficient of the compression spring (4).
4. The sealing device for lithium battery production as claimed in claim 1, wherein the top end of the compression block (3) is convex, and the diameter of the compression block (3) is larger than the inner diameter of the rotary sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022256997.0U CN212907884U (en) | 2020-10-12 | 2020-10-12 | Sealing device for lithium battery production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022256997.0U CN212907884U (en) | 2020-10-12 | 2020-10-12 | Sealing device for lithium battery production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212907884U true CN212907884U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022256997.0U Expired - Fee Related CN212907884U (en) | 2020-10-12 | 2020-10-12 | Sealing device for lithium battery production |
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| Country | Link |
|---|---|
| CN (1) | CN212907884U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113856425A (en) * | 2021-11-10 | 2021-12-31 | 南通理工学院 | A electrolytic device for electrolyzing marine water method handles boats and ships tail gas |
| CN114094198A (en) * | 2021-11-25 | 2022-02-25 | 遂宁市天莱新能源科技有限公司 | Sealing device for lithium battery production |
-
2020
- 2020-10-12 CN CN202022256997.0U patent/CN212907884U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113856425A (en) * | 2021-11-10 | 2021-12-31 | 南通理工学院 | A electrolytic device for electrolyzing marine water method handles boats and ships tail gas |
| CN114094198A (en) * | 2021-11-25 | 2022-02-25 | 遂宁市天莱新能源科技有限公司 | Sealing device for lithium battery production |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210406 Termination date: 20211012 |