CN110440989A - A method of assessment lithium-ion battery sealing-performance - Google Patents
A method of assessment lithium-ion battery sealing-performance Download PDFInfo
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- CN110440989A CN110440989A CN201910740100.0A CN201910740100A CN110440989A CN 110440989 A CN110440989 A CN 110440989A CN 201910740100 A CN201910740100 A CN 201910740100A CN 110440989 A CN110440989 A CN 110440989A
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- battery
- explosion
- nut cap
- ion battery
- sealing
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The present invention discloses a kind of method for assessing lithium-ion battery sealing-performance, comprising the following steps: step S10, provides battery to be assessed, the battery includes nut cap, and the nut cap has explosion-proof indentation；Step S20, the surface that the nut cap corresponds to the explosion-proof indent locations is first subjected to cure process, then high pressure gas is filled in the bottom of the battery or side, and detect the battery sealing part whether gas leakage, if the sealing part gas leakage of the battery, then the leakproofness of the battery is unqualified, if the sealing part of the battery is air tight, the leakproofness of the battery is qualified.Such appraisal procedure can detect the leakproofness of battery under higher air pressure during suppressing test, and the indentation in nut cap is avoided to be broken through.
Description
Technical field
The present invention relates to battery technology field more particularly to a kind of methods for assessing lithium-ion battery sealing-performance.
Background technique
Leakproofness is the key characteristic of lithium ion battery, and leakproofness difference will lead to risk of the lithium ion battery there are leakage,
Therefore, it after lithium ion battery sealing, needs to examine the being sealed property of sealing part of lithium ion battery.It is existing for suppressing test
One of the method that common lithium-ion battery sealing-performance is examined in technology, wherein suppressing test, the specific method is as follows: in battery
Bottom or side wall to the inside of battery be filled with high pressure gas, then detect the phenomenon that battery whether there is gas leakage.But in order to
It prevents lithium ion battery from exploding, indentation can be set in the nut cap of lithium ion battery under normal conditions.When suppressing test,
The air pressure being filled with cannot be excessive, and otherwise the indentation of nut cap can be broken through, and therefore, the presence of indentation is suppressing survey to lithium ion battery
The air pressure size that examination is filled with inside battery causes great limitation.
Summary of the invention
It is an object of the invention to: a kind of method for assessing lithium-ion battery sealing-performance is provided, in the process for suppressing test
In, the leakproofness of battery can be detected under higher air pressure, the indentation in nut cap is avoided to be broken through.
To reach this purpose, the invention adopts the following technical scheme:
A kind of method for assessing lithium-ion battery sealing-performance is provided, comprising the following steps:
Step S10, battery to be assessed is provided, the battery includes nut cap, and the nut cap has explosion-proof indentation；
Step S20, the surface that the nut cap corresponds to the explosion-proof indent locations is first subjected to cure process, then described
The bottom or side of battery are filled with high pressure gas, and detect the battery sealing part whether gas leakage, if the envelope of the battery
Gas leakage at mouthful, then the leakproofness of the battery is unqualified, if the sealing part of the battery is air tight, the leakproofness of the battery
It is qualified.
The a preferred technical solution of method as the assessment lithium-ion battery sealing-performance, in the step
In S20, the surface that the nut cap corresponds to the explosion-proof indent locations is carried out by cure process using cold inlay.
The a preferred technical solution of method as the assessment lithium-ion battery sealing-performance, the step S20
It specifically includes step S21, heat the cold inlay, the cold inlay is made to become liquid from solid-state；
Step S22, the cold inlay of liquid is coated in the surface that the nut cap corresponds to the explosion-proof indent locations,
Form hardened layer.
The a preferred technical solution of method as the assessment lithium-ion battery sealing-performance, the hardened layer
Thickness is greater than or equal to the depth of the explosion-proof indentation.
The a preferred technical solution of method as the described assessment lithium-ion battery sealing-performance, the hardened layer by
The direction that the opening of the explosion-proof indentation is directed away from the explosion-proof indentation extends.
The a preferred technical solution of method as the assessment lithium-ion battery sealing-performance, the hardened layer cover
Cover the one side of battery core of the nut cap far from the battery.
The a preferred technical solution of method as the assessment lithium-ion battery sealing-performance, the step S20
In, the cold inlay of liquid is coated on the explosion-proof indentation, after 10~30min of interval time, then in the battery
Bottom or side be filled with high pressure gas.
The a preferred technical solution of method as the assessment lithium-ion battery sealing-performance, in the battery
Inside is filled with before high pressure gas, first determines that the liquefied cold inlay is fully hardened in the nut cap.
The a preferred technical solution of method as the assessment lithium-ion battery sealing-performance, in the step
In S20, after the battery bottom or side wall are filled with high pressure gas, after 8~10s of pressure maintaining, then detect the battery whether gas leakage.
The a preferred technical solution of method as the assessment lithium-ion battery sealing-performance, if the battery
Leakproofness is unqualified, then takes out the hardened layer on the explosion-proof indentation, then repair again to the battery.
The invention has the benefit that the thickness that nut cap corresponds to explosion-proof indentation is less than since explosion-proof indentation is in groove structure
Nut cap others position, when the air pressure of inside battery is larger, explosion-proof indentation is easy to be broken through in the corresponding position of nut cap.Anti-
The position of quick-fried knurled surfaces carries out cure process, to thicken to quick-fried indentation correspondence in the position of nut cap, so that explosion-proof indentation
Structure effectively reinforced, after inside battery is filled with high pressure gas, the position that nut cap corresponds to explosion-proof indentation can not be rushed
It is broken, so that air pressure be made to squeeze the position between nut cap and sealing ring.Lithium-ion battery sealing-performance is assessed using the method, is being carried out
The sealing part of lithium ion battery can be detected under higher air pressure when suppressing test, avoid explosion-proof indentation in nut cap
Position is broken through and stops sealing the risk newly assessed by force.
Detailed description of the invention
The present invention will be further described in detail below based on the drawings and embodiments.
Fig. 1 is the structural schematic diagram for the sealing part that the nut cap blocks the battery.
In figure:
1, the inside of battery；2, nut cap；21, explosion-proof indentation；3, sealing ring.
Specific embodiment
To keep the technical problems solved, the adopted technical scheme and the technical effect achieved by the invention clearer, below
It will the technical scheme of the embodiment of the invention will be described in further detail in conjunction with attached drawing, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
In the description of the present invention unless specifically defined or limited otherwise, term " connected ", " connection ", " fixation " are answered
It is interpreted broadly, for example, it may be being fixedly connected, may be a detachable connection, or is integral；It can be mechanical connection,
It can be electrical connection；It can be directly connected, the company inside two elements can also be can be indirectly connected through an intermediary
Logical or two elements interaction relationship.For the ordinary skill in the art, can be understood with concrete condition above-mentioned
The concrete meaning of term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
As shown in Figure 1, the present invention provides a kind of method for assessing lithium-ion battery sealing-performance, comprising the following steps:
Step S10, battery to be assessed is provided, the battery includes nut cap 2, and the nut cap 2 has explosion-proof indentation 21.
Step S20, the surface of corresponding explosion-proof 21 position of indentation of the nut cap 2 is first subjected to cure process, then existed
The bottom or side of the battery are filled with high pressure gas, and detect the battery sealing part whether gas leakage, if the battery
Sealing part gas leakage, then the leakproofness of the battery is unqualified, if the sealing part of the battery is air tight, the battery it is close
Envelope property is qualified.
Specifically, in the step S20, after the battery bottom or side wall are filled with high pressure gas, 8~10s of pressure maintaining
Afterwards, then detect the battery whether gas leakage.
Since explosion-proof indentation 21 is in groove structure, the thickness of the corresponding explosion-proof indentation 21 of nut cap 2 is less than the other positions of nut cap 2
It sets, when the air pressure of inside battery is larger, explosion-proof indentation 21 is easy to be broken through in the corresponding position of nut cap 2.In explosion-proof indentation 21
The position on surface carries out cure process, to thicken to explosion-proof indentation 21 in the corresponding position of nut cap 2, so that explosion-proof indentation 21
Structure effectively reinforced, after the inside of battery 1 is filled with high pressure gas, the position of the corresponding explosion-proof indentation 21 of nut cap 2 without
Method is broken through, so that air pressure be made to squeeze the position between nut cap 2 and sealing ring 3.It is sealed using the method assessment lithium ion battery
Property, the sealing part of lithium ion battery can be detected under higher air pressure, be avoided in nut cap 2 when carrying out suppressing test
The risk of leakproofness assessment is broken through and stopped by force in the position of explosion-proof indentation 21.
In the step S20, using cold inlay by the surface of corresponding explosion-proof 21 position of indentation of the nut cap 2 into
Row cure process.
Wherein, the step S20 specifically includes step S21, heats the cold inlay, makes the cold inlay by solid
State becomes liquid.
Step S22, the cold inlay of liquid is coated in the table of corresponding explosion-proof 21 position of indentation of the nut cap 2
Face is formed hardened layer (hardened layer is not shown in Fig. 1).
Due to cold inlay under high temperature environment can by it is solid state transformed be liquid, can be converted at normal temperature by liquid low
Solid-state, using such characteristic of cold inlay, the convenient surface to corresponding explosion-proof 21 position of indentation of nut cap 2 carries out cure process
Operation.
In order to reinforce the structural strength of hardened layer, the thickness of the hardened layer is greater than or equal to the depth of the explosion-proof indentation 21
Degree.
In one embodiment, the hardened layer is directed away from the explosion-proof indentation 21 by the opening of the explosion-proof indentation 21
Direction extends, this design can increase the contact area of the hardened layer Yu the nut cap 2, improve and answer hardened layer to the viscous of nut cap 2
Intensity is connect, hardened layer is avoided to be detached from during assessment from nut cap 2.
Preferably, the hardened layer covers the one side of the battery core of the nut cap 2 far from the battery.
In the step S20, the cold inlay of liquid is coated on the explosion-proof indentation 21 for another embodiment,
After 10~30min of interval time, then in the bottom or side of the battery it is filled with high pressure gas.Under normal conditions, liquid is cold
Inlay be converted into it is solid during need one of time to coat the cold inlay interval 10 of liquid in the present embodiment
After~30min, then in the inside of battery 1 be filled with high pressure gas, be in order to guarantee that the cold inlay complete state of liquid is solid-state,
Prevent that the time is too short and the only cold inlay in part is hardened.
Preferably, before the inside of the battery 1 is filled with high pressure gas, first determine the liquefied cold inlay in institute
It states fully hardened in nut cap 2.
In the present embodiment, if the leakproofness of the battery is unqualified, the hardened layer on the explosion-proof indentation 21 is taken
Out, then the battery is repaired again.By repairing to battery, the qualification rate of battery sealing-performance is improved.
It should be noted that the method for the assessment lithium-ion battery sealing-performance is applicable not only to cylindrical lithium ion battery
The detection of leakproofness applies also for detection of other kinds of lithium-ion battery sealing-performance, such as rectangle lithium ion battery etc., In
This is not restricted the type of lithium ion battery.
In the description of this article, it is to be understood that term " on ", "lower", "left", "right", etc. orientation or positional relationships
To be based on the orientation or positional relationship shown in the drawings, it is merely for convenience of description and simplification operation, rather than indication or suggestion institute
The device or element of finger must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this hair
Bright limitation.In addition, term " first ", " second " are only used to distinguish between description, have no special meaning.
In the description of this specification, the description of reference term " embodiment ", " example " etc. means to combine the embodiment
Or example particular features, structures, materials, or characteristics described are included at least one embodiment or example of the invention.In
In this specification, schematic expression of the above terms be may not refer to the same embodiment or example.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the embodiments can also be appropriately combined, and forming those skilled in the art can
With the other embodiments of understanding.
The technical principle of the invention is described above in combination with a specific embodiment.These descriptions are intended merely to explain of the invention
Principle, and shall not be construed in any way as a limitation of the scope of protection of the invention.Based on the explanation herein, the technology of this field
Personnel can associate with other specific embodiments of the invention without creative labor, these modes are fallen within
Within protection scope of the present invention.
Claims (10)
1. a kind of method for assessing lithium-ion battery sealing-performance, which comprises the following steps:
Step S10, battery to be assessed is provided, the battery includes nut cap, and the nut cap has explosion-proof indentation；
Step S20, the surface that the nut cap corresponds to the explosion-proof indent locations is first subjected to cure process, then in the battery
Bottom or side be filled with high pressure gas, and detect the battery sealing part whether gas leakage, if the sealing part of the battery
Gas leakage, then the leakproofness of the battery is unqualified, if the sealing part of the battery is air tight, the leakproofness of the battery is closed
Lattice.
2. the method for assessment lithium-ion battery sealing-performance according to claim 1, which is characterized in that in the step S20
In, the surface that the nut cap corresponds to the explosion-proof indent locations is carried out by cure process using cold inlay.
3. the method for assessment lithium-ion battery sealing-performance according to claim 2, which is characterized in that the step S20 tool
Body includes step S21, by the cold inlay heating, and the cold inlay is made to become liquid from solid-state；
Step S22, the cold inlay of liquid is coated in the surface that the nut cap corresponds to the explosion-proof indent locations, is formed
Hardened layer.
4. according to the method for the assessment lithium-ion battery sealing-performance that claim 3 is stated, which is characterized in that the thickness of the hardened layer
More than or equal to the depth of the explosion-proof indentation.
5. the method for assessment lithium-ion battery sealing-performance according to claim 3, which is characterized in that the hardened layer is by institute
The opening for stating explosion-proof indentation is directed away from the direction extension of the explosion-proof indentation.
6. the method for assessment lithium-ion battery sealing-performance according to claim 5, which is characterized in that the hardened layer covering
The one side of battery core of the nut cap far from the battery.
7. the method for assessment lithium-ion battery sealing-performance according to claim 3, which is characterized in that in the step S20,
The cold inlay of liquid is coated on the explosion-proof indentation, after 10~30min of interval time, then at the bottom of the battery
Portion or side are filled with high pressure gas.
8. the method for assessment lithium-ion battery sealing-performance according to claim 7, which is characterized in that in the battery
Portion is filled with before high pressure gas, first determines that the liquefied cold inlay is fully hardened in the nut cap.
9. the method for assessment lithium-ion battery sealing-performance according to claim 1, which is characterized in that in the step S20
In, after the battery bottom or side wall are filled with high pressure gas, after 8~10s of pressure maintaining, then detect the battery whether gas leakage.
10. the method for assessment lithium-ion battery sealing-performance according to any one of claims 1 to 9, which is characterized in that if institute
The leakproofness for stating battery is unqualified, then takes out the hardened layer on the explosion-proof indentation, then repair again to the battery.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910740100.0A CN110440989B (en) | 2019-08-12 | 2019-08-12 | Method for evaluating lithium ion battery sealing performance |
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| CN201910740100.0A CN110440989B (en) | 2019-08-12 | 2019-08-12 | Method for evaluating lithium ion battery sealing performance |
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| CN110440989B CN110440989B (en) | 2021-04-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111735707A (en) * | 2020-06-29 | 2020-10-02 | 天津市捷威动力工业有限公司 | Method and device for testing packaging strength of lithium ion soft package battery |
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