CN204668381U - A kind of lithium battery seal body - Google Patents
A kind of lithium battery seal body Download PDFInfo
- Publication number
- CN204668381U CN204668381U CN201520374162.1U CN201520374162U CN204668381U CN 204668381 U CN204668381 U CN 204668381U CN 201520374162 U CN201520374162 U CN 201520374162U CN 204668381 U CN204668381 U CN 204668381U
- Authority
- CN
- China
- Prior art keywords
- seal body
- aluminium film
- ring
- ptc
- shaped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 14
- 239000004411 aluminium Substances 0.000 claims abstract description 37
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 37
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 238000007599 discharging Methods 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
- 230000001681 protective effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model discloses a kind of lithium battery seal body, comprise seal body lower cover, aluminium film, ring-shaped P TC and the seal body upper cover with steam vent, seal body lower cover comprises base and bound edge, base is provided with a boss upwards, base is divided into the central recess being positioned at peripheral annular groove and having a pressure release circular hole by boss, the periphery of aluminium film is pressed on boss, ring-shaped P TC is placed in annular groove, the upper surface of ring-shaped P TC and the upper surface flush of aluminium film, the following lower surface of seal body upper cover is pressed in the upper surface of ring-shaped P TC and aluminium film simultaneously, its advantage is pushing down aluminium film below simultaneously and being positioned on the PTC outside aluminium film of seal body upper cover, aluminium film and PTC are not in contact with each other, when inflating test, the center of aluminium film is upwards heaved, also any impact can not be produced on the PTC in outside, PTC is only by the pressure of seal body upper cover, be in formation state always, when big current or adstante febre, the macromolecular material in PTC intermediate layer expands evenly, the security performance of battery is made to reach optimum state.
Description
Technical field
The utility model relates to a kind of lithium battery, especially relates to a kind of lithium battery seal body.
Background technology
The seal body structure of traditional lithium battery comprises seal body lower cover, PTC (positive temperature coefficient heat energy resistance), seal body upper cover, aluminium film and sealing ring, have an annular protrusion in the middle of seal body lower cover, the centre of annular protrusion is provided with pressure release circular hole; Aluminium film paste is on annular protrusion, and covered by circular hole, its effect is the solution leakage preventing inside battery, and simultaneously during inside battery pressure abnormity, air pressure inside breaks through aluminium film on pressure release circular hole, discharges, thus play decompression function from the steam vent of seal body upper cover.China Patent No. be 200820176370.0 utility model patent disclose a kind of column type lithium cell seal body, comprise explosion-proof bottom cover, rupture pressure disc, PTC plate, insulated ring and terminal bottom composition, the inside of explosion-proof bottom cover forms groove downwards, explosionproof hole is had at the center of groove, soldering polar ear on the step plane of the protruding one side of explosion-proof bottom cover, rupture pressure disc is pressed on groove, on rupture pressure disc on once stack PTC plate, insulated ring and terminal bottom, terminal bottom and explosion-proof bottom cover are isolated by insulated ring and are sealed, winding in explosion-proof bottom cover edge, PTC plate, sealed insulation circle and terminal bottom volume force together, its effect is that between accessory, sealing is tight, be not easy to loosen, result of use is good, process simple and easy to use.
PTC cries again " semistor ", is made up of upper, middle and lower-ranking, and levels is nickel-plated metal layer, and intermediate layer is macromolecule layer.When inside battery has big current to pass through or adstante febre, PTC intermediate layer i.e. macromolecule layer can expand, and upper nickel coating and lower nickel coating disconnect, and play circuit safety protective effect with this.Under normal circumstances, the macromolecule layer of PTC is even uniform, and high molecular expansion structure is also uniformly distributed.
Aluminium film is made up of upper, middle and lower-ranking, and upper strata is insulating material, and intermediate layer is aluminium, and lower floor is PE film.When aluminium film and lower cover attach, PE film and lower cover boss are heated and stick, and play fixation.Upper strata insulating material causes short circuit phenomenon to prevent upper cover to contact with lower cover.
In the above-mentioned seal body process of making, after Aluminium film paste is good, in order to test the sealing of aluminium film, needing seal body lower cover inner inflatable, after qualified after tested, carrying out bound edge process again.Aluminium film in seal body after shaping because of measuring air pressure between upwards heave, the aluminium film heaved forms certain pressure to PTC, the mid portion of PTC is caused also slightly upwards to arch upward distortion, when inside battery has big current to pass through or adstante febre, the macromolecular material non-homogeneous expansion in PTC intermediate layer is even, and battery safety fails to reach optimum efficiency.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of under big current or heat condition, and the macromolecular material in PTC expands uniform lithium battery seal body.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of lithium battery seal body, comprise seal body lower cover, aluminium film, ring-shaped P TC and the seal body upper cover with steam vent, described seal body lower cover comprises base and bound edge, described base is provided with a boss upwards, base is divided into the central recess being positioned at peripheral annular groove and having a pressure release circular hole by described boss, the periphery of described aluminium film is pressed on described boss, described ring-shaped P TC is placed in annular groove, the upper surface of ring-shaped P TC and the upper surface flush of aluminium film, the following lower surface of seal body upper cover is pressed in the upper surface of PTC and aluminium film simultaneously.After inside battery air pressure is excessive, gas breaks through aluminium film through pressure release circular hole, directly discharges from the steam vent of seal body upper cover.Because PTC is arranged in annular groove, internal gas flow is without the need to directly discharging from seal body upper cover through PTC, and exhaust velocity is faster.
The bound edge of seal body lower cover is pressed in the following top of described seal body upper cover by sealing ring.
Described sealing ring comprises first below, the first vertical edge and the first top, described first outside being positioned at PTC below, first top is positioned at the following top of seal body upper cover, the bound edge of described seal body lower cover comprises the second vertical edge and the second top, second vertical edge is positioned at the outside of the first vertical edge, and the second top is pressed in the top of the first top.The outside of second step is for welding the lug of battery.Seal body upper cover is pushed down by sealing ring by seal body lower cover, and sealing ring plays the effect of sealing and insulation simultaneously.
Compared with prior art, the utility model has the advantages that pushing down aluminium film below simultaneously and being positioned on the PTC outside aluminium film of seal body upper cover, aluminium film and PTC are not in contact with each other, and when inflating test, the center of aluminium film is upwards heaved, also any impact can not be produced on the PTC in outside, PTC only by the pressure of seal body upper cover, is in formation state, when big current or adstante febre always, the macromolecular material in PTC intermediate layer expands evenly, makes the security performance of battery reach optimum state.
Accompanying drawing explanation
Fig. 1 is the battery seal body structure figure of prior art;
Fig. 2 is structure chart of the present utility model;
Fig. 3 is A place enlarged drawing in Fig. 2;
Fig. 4 is B place enlarged drawing in Fig. 2.
Embodiment
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
Shown in prior art Fig. 1, PTC is pressed in the top of aluminium film, and the centre position of aluminium film is upwards heaved.
The utility model discloses a kind of lithium battery seal body, as in Figure 2-4, comprise seal body lower cover 1, aluminium film 2, ring-shaped P TC3 and the seal body upper cover 5 with steam vent 4, seal body lower cover 1 comprises base 11 and bound edge 12, base 11 is provided with a boss 6 upwards, base 11 is divided into the central recess 9 being positioned at peripheral annular groove 7 and having a pressure release circular hole 8 by boss 6, the periphery of aluminium film 2 is pressed on boss 6, ring-shaped P TC3 is placed in annular groove 7, the upper surface of ring-shaped P TC3 and the upper surface flush of aluminium film 2, 5 following 51 lower surfaces of seal body upper cover are pressed in the upper surface of ring-shaped P TC3 and aluminium film 2 simultaneously.The bound edge 12 of seal body lower cover 1 by sealing ring 10 be pressed in seal body upper cover 5 following 51 above.Sealing ring 10 comprises the first following 101, first vertical edge 102 and the first top 103, first following 101 outside being positioned at ring-shaped P TC3, first top 103 be positioned at seal body upper cover 5 following 51 above, the bound edge 12 of seal body lower cover 1 comprises the second vertical edge 121 and the second top 122, second vertical edge 121 is positioned at the outside of the first vertical edge 102, and the second top 122 is pressed in the top of the first top 103.
Above lithium battery seal body provided by the utility model is described in detail, apply specific case herein to set forth principle of the present utility model and execution mode, the explanation of above embodiment just understands the utility model and core concept for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection range of the utility model claim.
Claims (3)
1. a lithium battery seal body, comprise seal body lower cover, aluminium film, ring-shaped P TC and the seal body upper cover with steam vent, described seal body lower cover comprises base and bound edge, it is characterized in that described base being provided with a boss upwards, base is divided into the central recess being positioned at peripheral annular groove and having a pressure release circular hole by described boss, the periphery of described aluminium film is pressed on described boss, described ring-shaped P TC is placed in annular groove, the upper surface of ring-shaped P TC and the upper surface flush of aluminium film, the following lower surface of seal body upper cover is pressed in the upper surface of ring-shaped P TC and aluminium film simultaneously.
2. a kind of lithium battery seal body according to claim 1, is characterized in that the bound edge of seal body lower cover is pressed in the following top of described seal body upper cover by sealing ring.
3. a kind of lithium battery seal body according to claim 2, it is characterized in that described sealing ring comprises first below, the first vertical edge and the first top, described first outside being positioned at ring-shaped P TC below, first top is positioned at the following top of seal body upper cover, the bound edge of described seal body lower cover comprises the second vertical edge and the second top, second vertical edge is positioned at the outside of the first vertical edge, and the second top is pressed in the top of the first top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520374162.1U CN204668381U (en) | 2015-06-03 | 2015-06-03 | A kind of lithium battery seal body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520374162.1U CN204668381U (en) | 2015-06-03 | 2015-06-03 | A kind of lithium battery seal body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204668381U true CN204668381U (en) | 2015-09-23 |
Family
ID=54138734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520374162.1U Expired - Fee Related CN204668381U (en) | 2015-06-03 | 2015-06-03 | A kind of lithium battery seal body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204668381U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993080A (en) * | 2015-06-03 | 2015-10-21 | 宁波超霸能源有限公司 | Sealing body for lithium battery |
| CN109709137A (en) * | 2018-12-28 | 2019-05-03 | 湖北雷迪特冷却系统股份有限公司 | A kind of cell water cold plate temperature uniformity test device and method |
-
2015
- 2015-06-03 CN CN201520374162.1U patent/CN204668381U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993080A (en) * | 2015-06-03 | 2015-10-21 | 宁波超霸能源有限公司 | Sealing body for lithium battery |
| CN104993080B (en) * | 2015-06-03 | 2017-03-29 | 宁波超霸能源有限公司 | A kind of lithium battery seal body |
| CN109709137A (en) * | 2018-12-28 | 2019-05-03 | 湖北雷迪特冷却系统股份有限公司 | A kind of cell water cold plate temperature uniformity test device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 |