CN205657095U - Cylindrical lithium cell and apron structure thereof - Google Patents
Cylindrical lithium cell and apron structure thereof Download PDFInfo
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- CN205657095U CN205657095U CN201620433296.0U CN201620433296U CN205657095U CN 205657095 U CN205657095 U CN 205657095U CN 201620433296 U CN201620433296 U CN 201620433296U CN 205657095 U CN205657095 U CN 205657095U
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- aluminium flake
- aluminum sheet
- inert substance
- plate structure
- covering plate
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Abstract
The utility model relates to a lithium battery technology field especially relates to cylindrical lithium cell and apron structure thereof, the apron structure, including lower aluminum sheet, go up the aluminum sheet and have fenestrate top cap, go up the aluminum sheet locate down the aluminum sheet the top and with aluminum sheet butt down, the top cap is located the top of aluminum sheet and is connected with last aluminum sheet, the surface covering of going up the aluminum sheet has the inert substance isolation layer that is used for keeping apart upward aluminum sheet and external environment and contacts. The utility model discloses an apron structure, because the surface covering at last aluminum sheet has one deck inert substance isolation layer, can form the isolation with external environment with going up the aluminum sheet through this inert substance isolation layer, avoid using the cylindrical lithium cell that has this apron structure in storage or use, it forms the micro cell effect to pollute because of last aluminum sheet self material defect or by external environment, produce electrochemical reaction and arouse the pitting corrosion, so as to stops the condition that the weeping appears in the aluminum sheet, ensure to use the safe handling that has the cylindrical lithium cell of this apron structure.
Description
Technical field
This utility model relates to technical field of lithium batteries, particularly relates to cylinder type lithium battery and covering plate structure thereof.
Background technology
Cylindrical lithium ion battery leakage problem is defect the most fatal during battery uses, especially with
On a large amount of series-parallel element of needs；Such as electric automobile, electrolyte has stronger corrosivity, easily rotten
Erosion circuit, and the solvent contained by electric automobile is inflammable, so leakage problem is more fatal defect.
Cylindrical lithium ion battery, during manufacturing, has a lot of reasons to cause battery leakage, because of supplied materials or
The leakage that the factor that processing procedure controls causes, is the most preferably identified, effectively can be controlled by management means；
And wherein have a kind of because fault in material or environmental problem, cause covering plate structure upper of cylindrical lithium ion battery
Aluminium flake is bored a hole because of spot corrosion, at the most explosion-proof indentation, causes electrolyte to spill, such leakage mode
May will not occur at short notice, but often by shelving for a long time and using, leakage problem just by
Step displays, and therefore, such leakage problem is difficult to be found in time to be controlled, thus causes the biggest
Potential safety hazard.
Utility model content
The purpose of this utility model is to provide a kind of cylinder type lithium battery and covering plate structure thereof, it is intended to solve existing
The technical problem of upper aluminium flake leakage hidden danger with the presence of the cylinder type lithium battery of technology.
For achieving the above object, the technical solution of the utility model is: covering plate structure, including lower aluminium flake, on
Aluminium flake and the top cover with perforation, described upper aluminium flake is located at the top of described lower aluminium flake and supports with described lower aluminium flake
Connecing, described top cover is located at the top of described upper aluminium flake and is connected with described upper aluminium flake, the surface of described upper aluminium flake
It is coated with for isolating the inert substance sealing coat that described upper aluminium flake contacts with external environment.
Preferably, described inert substance sealing coat is tetrafluoroethene inert substance sealing coat or Kynoar
Inert substance sealing coat.
Preferably, the thickness of described inert substance sealing coat is 0.1～2mm.
Preferably, described inert substance sealing coat is adhered on the surface of described upper aluminium flake.
Preferably, the periphery of described upper aluminium flake is folded upward at forming interior annular groove, the periphery setting-in of described top cover
In described interior annular groove.
Preferably, described covering plate structure also includes that sealing ring, described sealing ring include annular body and described
Annular table that the medial surface of annular body is extended towards the axis of annular ring body and circular orientation
Projection, described circular orientation is protruding and forms screens groove between described annular table, and described upper aluminium flake is flush-mounted in institute
State in screens groove.
Preferably, it is provided with annular gasket between periphery and the described upper aluminium flake of described lower aluminium flake.
The beneficial effects of the utility model: covering plate structure of the present utility model, are applied on cylinder type lithium battery,
Owing to being coated with one layer of inert substance sealing coat on the surface of upper aluminium flake, permissible by this inert substance sealing coat
Upper aluminium flake is formed isolation with external environment, it is to avoid use the cylinder type lithium battery having this covering plate structure in storage
Or during Shi Yonging, form micro cell effect because of upper aluminium flake own material defect or by external environmental,
Produce electrochemical reaction and cause spot corrosion such that it is able to stop upper aluminium flake and the situation of leakage, Jin Erpai occur
Except the hidden danger using the cylinder type lithium battery leakage with the presence of this covering plate structure, it is ensured that use and have this covering plate structure
The safe handling of cylinder type lithium battery.
Of the present utility model another solution is that cylinder type lithium battery, including above-mentioned covering plate structure.
Cylinder type lithium battery of the present utility model, owing to employing above-mentioned covering plate structure, passes through covering plate structure
Upper aluminum flake surface cover inert substance sealing coat, it is possible to stop upper aluminium flake and the situation of leakage occur, thus
Get rid of covering plate structure and there is the hidden danger of leakage, and then be able to ensure that the safe handling of cylinder type lithium battery.
Accompanying drawing explanation
The structure cut-away illustration of the covering plate structure that Fig. 1 provides for this utility model embodiment.
Fig. 2 is the close-up schematic view in Fig. 1 at A.
Reference includes:
Aluminium flake 21 interior annular groove on 10 times aluminium flakes 20
30 top covers 31 are bored a hole 40 inert substance sealing coats
50 annular gasket 60 sealing ring 61 annular body
The protruding 64 screens grooves of 62 annular table 63 circular orientation.
Detailed description of the invention
Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, its
In the most same or similar label represent same or similar element or there is same or like function
Element.The embodiment described below with reference to accompanying drawing 1～2 is exemplary, it is intended to be used for explaining this reality
With novel, and it is not intended that to restriction of the present utility model.
In description of the present utility model, it is to be understood that term " length ", " width ", " on ", D score,
"front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " etc. refer to
The orientation shown or position relationship, for based on orientation shown in the drawings or position relationship, are for only for ease of description originally
Utility model and simplification describe rather than indicate or imply that the device of indication or element must have specific side
Position, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint
Relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", "
Two " feature can express or implicitly include one or more this feature.Of the present utility model
In description, " multiple " are meant that two or more, unless otherwise expressly limited specifically.
In this utility model, unless otherwise clearly defined and limited, term " install ", " being connected ", " even
Connect ", the term such as " fixing " should be interpreted broadly, connect for example, it may be fixing, it is also possible to be detachable
Connect, or integral；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is possible to
To be indirectly connected to by intermediary, can be connection or the interaction of two elements of two element internals
Relation.For the ordinary skill in the art, can understand that above-mentioned term is at this as the case may be
Concrete meaning in utility model.
As shown in Figure 1 to Figure 2, this utility model embodiment provide covering plate structure, including lower aluminium flake 10,
Upper aluminium flake 20 and the top cover 30 with perforation 31, the top of described lower aluminium flake 10 is located at by described upper aluminium flake 20
And abut with described lower aluminium flake 10, described top cover 30 be located at described upper aluminium flake 20 top and with described on
Aluminium flake 20 connects, and the surface of described upper aluminium flake 20 is coated with for isolating described upper aluminium flake 20 and extraneous ring
The inert substance sealing coat 40 of border contact.This utility model embodiment covering plate structure, be mainly used in circle
On cylindricality lithium battery, owing to being coated with one layer of inert substance sealing coat 40 on the surface of upper aluminium flake 20, pass through
Upper aluminium flake 20 can be formed isolation with external environment by this inert substance sealing coat 40, it is to avoid uses and has this lid
The cylinder type lithium battery of plate structure during storage or using, because of upper aluminium flake 20 own material defect or
Formed micro cell effect by external environmental, produce electrochemical reaction and cause spot corrosion such that it is able to Du
There is the situation of leakage in upper aluminium flake 20, and then eliminating uses and has the cylinder type lithium battery of this covering plate structure to deposit
Hidden danger in leakage, it is ensured that use the safe handling of the cylinder type lithium battery having this covering plate structure.
Wherein, inert substance sealing coat 40 does not interferes with the explosion prevention function of covering plate structure itself.It addition, it is excellent
Selection of land, the area of upper aluminium flake 20 is more than the area of lower aluminium flake 10.
In the present embodiment, described inert substance sealing coat 40 is tetrafluoroethene inert substance sealing coat or gathers
Vinylidene inert substance sealing coat.Concrete, use tetrafluoroethene material to make inert substance sealing coat 40,
Or use polyvinylidene fluoride material to make inert substance sealing coat 40, concrete, can be by liquid
Tetrafluoroethene or Kynoar be dropped at the perforation 31 of top cover 30 on the surface of upper aluminium flake 20,
Thus form the inert substance sealing coat 40 of dense film structure.
Certainly, in other embodiments, inert substance sealing coat 40 can be containing hydrophobic material or super thin
The material of water material is made.
In the present embodiment, the thickness of described inert substance sealing coat 40 is 0.1～2mm.Concrete, also should
Inert substance sealing coat 40 in 0.1～2mm thickness range value can either play the upper aluminium flake 20 of isolation with extraneous
The effect of environment contact；The setting of whole covering plate structure will not be affected again because thickness is too big.
More specifically, the thickness of inert substance sealing coat 40 can be 0.1,0.5mm, 1mm, 1.5mm
Or 2mm, needs as the case may be, select and be arranged on without the inert substance sealing coat 40 of thickness
On the surface of upper aluminium flake 20.
In the present embodiment, described inert substance sealing coat 40 is adhered on the surface of described upper aluminium flake 20.Tool
Body, inert substance sealing coat 40 can drop onto when liquid on the surface of aluminium flake 20, and
Along with the cooling of temperature is bonded on the surface of upper aluminium flake 20, not only may insure that inert substance sealing coat 40
The stability being connected with the surface of upper aluminium flake 20, and it is very convenient to operate, simple and practical.
In the present embodiment, the periphery of described upper aluminium flake 20 is folded upward at forming interior annular groove 21, described top cover
The periphery of 30 is flush-mounted in described interior annular groove 21.Concrete, it is bent to form by the periphery of upper aluminium flake 20
The periphery of setting-in top cover 30 before interior annular groove 21, it is possible to reduce the setting of other auxiliary members, again can be true
On guarantor, aluminium flake 20 realizes being connected with top cover 30, and upper aluminium flake 20 is aluminum material, comes easily by deformation
Formed interior annular groove 21, and front be embedded in top cover 30 periphery time, top cover 30 can be riveted by deformation
Periphery, strengthen further the stability that upper aluminium flake 20 is connected with top cover 30；And whole lid will not be increased
The volume of plate structure, scientific structure design is reasonable, practical.
In the present embodiment, described covering plate structure also includes that sealing ring 60, described sealing ring 60 include annular ring
The medial surface of body 61 and annular ring body 61 is extended towards the axis of annular ring body 61
Annular table 62 and circular orientation projection 63, between described circular orientation protruding 63 and described annular table 62
Forming screens groove 64, described upper aluminium flake 20 is flush-mounted in described screens groove 64.Concrete, sealing ring 60
Not only can play the effect of sealing, due also to its medial surface towards annular body 61 axis extend set
Be equipped with annular table 62 and circular orientation projection 63, thus by annular table 62 and circular orientation protruding 63 it
Between formed screens groove 64 be upper aluminium flake 20 provide clamping install space, it is not necessary to increase miscellaneous part
In the case of be able to ensure that aluminium flake 20 install after have good stability.
In the present embodiment, between periphery and the described upper aluminium flake 20 of described lower aluminium flake 10, it is provided with annular gasket
50.Concrete, annular gasket 50 arrange so that the periphery of lower aluminium flake 10 and described upper aluminium flake 20
Spaced apart, form certain pitch space, aluminium flake 20 and the topology layout of lower aluminium flake 10 in convenience.
This utility model embodiment additionally provides a kind of cylinder type lithium battery, and it includes above-mentioned covering plate structure.
This utility model embodiment provide cylinder type lithium battery, owing to employing the lid in above-described embodiment
Plate structure, the inert substance sealing coat 40 covered by upper aluminium flake 20 surface of covering plate structure, it is possible to stop
There is the situation of leakage in upper aluminium flake 20, thus gets rid of covering plate structure and there is the hidden danger of leakage, and then can be true
Protect the safe handling of cylinder type lithium battery.
Understanding this utility model in sum is to have above-described good characteristic, is made it use
On, promote the usefulness not having in conventional art and there is practicality, become the product of a great practical value.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model,
All any amendment, equivalent or improvement etc. made within thought of the present utility model and principle, all should
Within being included in protection domain of the present utility model.
Claims (8)
1. covering plate structure, including lower aluminium flake, upper aluminium flake and the top cover with perforation, it is characterised in that: institute
Stating aluminium flake be located at the top of described lower aluminium flake and abut with described lower aluminium flake, described top cover is located at described upper aluminum
The top of sheet is also connected with described upper aluminium flake, and the surface of described upper aluminium flake is coated with for isolating described upper aluminium flake
The inert substance sealing coat contacted with external environment.
Covering plate structure the most according to claim 1, it is characterised in that: described inert substance sealing coat
For tetrafluoroethene inert substance sealing coat or Kynoar inert substance sealing coat.
Covering plate structure the most according to claim 1, it is characterised in that: described inert substance sealing coat
Thickness be 0.1～2mm.
Covering plate structure the most according to claim 1, it is characterised in that: described inert substance sealing coat
It is adhered on the surface of described upper aluminium flake.
Covering plate structure the most according to claim 1, it is characterised in that: the periphery of described upper aluminium flake to
On be bent to form interior annular groove, the periphery of described top cover is flush-mounted in described interior annular groove.
6. according to the covering plate structure described in any one of Claims 1 to 5, it is characterised in that: described cover plate is tied
Structure also includes that sealing ring, described sealing ring include that the medial surface of annular body and annular ring body is towards institute
State the extended annular table in the axis of annular body and circular orientation be protruding, described circular orientation protruding with
Forming screens groove between described annular table, described upper aluminium flake is flush-mounted in described screens groove.
7. according to the covering plate structure described in any one of Claims 1 to 5, it is characterised in that: described lower aluminium flake
Periphery and described upper aluminium flake between be provided with annular gasket.
8. cylinder type lithium battery, it is characterised in that: include the cover plate knot described in any one of claim 1～7
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620433296.0U CN205657095U (en) | 2016-05-12 | 2016-05-12 | Cylindrical lithium cell and apron structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620433296.0U CN205657095U (en) | 2016-05-12 | 2016-05-12 | Cylindrical lithium cell and apron structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205657095U true CN205657095U (en) | 2016-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620433296.0U Active CN205657095U (en) | 2016-05-12 | 2016-05-12 | Cylindrical lithium cell and apron structure thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN205657095U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151702A (en) * | 2019-06-27 | 2020-12-29 | 宁德时代新能源科技股份有限公司 | Lithium ion battery |
-
2016
- 2016-05-12 CN CN201620433296.0U patent/CN205657095U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151702A (en) * | 2019-06-27 | 2020-12-29 | 宁德时代新能源科技股份有限公司 | Lithium ion battery |
| CN112151702B (en) * | 2019-06-27 | 2022-04-19 | 宁德时代新能源科技股份有限公司 | Lithium ion battery |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |