CN108199085A - A kind of lithium ion battery vacuum seal method - Google Patents
A kind of lithium ion battery vacuum seal method Download PDFInfo
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- CN108199085A CN108199085A CN201711395432.7A CN201711395432A CN108199085A CN 108199085 A CN108199085 A CN 108199085A CN 201711395432 A CN201711395432 A CN 201711395432A CN 108199085 A CN108199085 A CN 108199085A
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- battery
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- 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
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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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- 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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- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention belongs to cell manufacturing techniques fields, disclose a kind of vacuum seal method of battery, this method after at least 5min in the vacuum environment that the battery sealed is placed in 40KPa~60KPa by will carry out sealing sealing again, thus the gas being completely exhausted out under the premise of can not being extracted battery ensuring electrolyte in battery, inside battery pressure is enable to keep high unity, improve the ownership of electrolyte in battery, so as to ensure that the capacity of battery and service life, while also ensure that cell shapes do not change.Also, the method technological parameter setting of the present invention is reasonable, and environment influence can be effectively reduced in vacuum environment；It is easy to operate, quickly closed environment can be optimized；Suitable for batch production, ensure to provide foundation to single battery sealing sealing while product quality requirement.
Description
Technical field
The invention belongs to cell manufacturing techniques fields, and in particular to a kind of lithium ion battery vacuum seal method.
Background technology
Lithium ion battery is with energy density is big, power density is high, has extended cycle life, good reliability, safe, volume
The advantages that small, light-weight as electric vehicle preferred electrical source of power.The core of lithium battery is battery core, and battery core is by electrode, electrolysis
The compositions such as liquid are shaped and are protected by housing, cover board etc. outside battery core.
Lithium battery currently on the market is generally using rectangular configuration, and housing is usually in flat, and shell material is mostly not
Become rusty steel or aluminium, but since the lithium battery of aluminum hull has the characteristics that than box hat battery capacity bigger, therefore lithium battery development in the market
Trend is rectangle aluminum-shell lithium battery.Aluminum-shell lithium battery is in process of production using open formation or using first by liquid injection hole
The method being melted into again after sealing, since battery core can all form SEI films and by-product gas in formation process, and the gas generated holds
It easily rests between pole piece and pole piece, therefore is required for carrying out deflation processing again.Generally use what is vacuumized in actual production
Mode is to achieve the purpose that deflation, specifically, after vacuum suction is basic clean, by battery removal vacuum chamber again to liquid injection hole into
Row sealing sealing.Although this method can discharge the gas in battery core to a certain extent, once battery is returned to outside vacuum chamber
In atmospheric environment, still having portion gas and penetrating into again in battery core namely in battery core still has more gas to retain, result
Being electrolyte is difficult to that pole piece is carried out fully comprehensively to soak when being rested on the gas barrier between pole piece and pole piece, causes
Prevent pole piece at bubble from preferably activating, cause easily to analyse lithium in the charge and discharge process that battery core uses afterwards, influence electricity
Core capacity.
For this purpose, Chinese patent literature CN101009366A discloses a kind of mouth-sealing method of square lithium ion battery, the party
Method is by the case where steel ball is sent to ensure that battery is in vacuum environment state always when entering pressure seal mouth under position and press-in needle, avoiding battery
Occur the phenomenon that cell thickness rebound, bulging after sealing, ensure that battery has good vacuum degree and reliable leakproofness.So
And above-mentioned technology is the sealing treatment carried out under the conditions of larger vacuum degree (- 95KPa), although the gas in battery can be extracted out
Body, but at the same time the electrolyte in battery will be also extracted together therewith, lead to the ownership of electrolyte to reduce, so as to influence
The capacity of battery.If hastily reduce vacuum degree during sealing, then be likely to the gas in battery can not be fully drawn out, reach
Less than expected exhaust effect.To sum up, vacuum condition during sealing how is strictly controlled, before ensuring that electrolyte is not extracted
The gas being completely exhausted out in battery is put, this is a stern challenge to those skilled in the art.
Invention content
What the present invention solved is that existing battery vacuum seal method can not be taken into account while electrolyte is not extracted and again can
The defects of being completely exhausted out gas in battery, and then a kind of gas that can be completely exhausted out in battery is provided, ensures that electrolyte
The battery vacuum seal method not being extracted.
In order to achieve the above objectives, the technical solution adopted in the present invention is as follows：
A kind of vacuum seal method of battery, including,
The battery vacuum-pumping of sealing is treated to negative pressure, and keeps the negative pressure at least 5min；
Sealing sealing is carried out to the battery under the condition of negative pressure；
Wherein, the value of the negative pressure is -40KPa~-60KPa.
Above-mentioned battery vacuum seal method is by the way that battery to be sealed is placed in the vacuum environment of -40KPa~-60KPa
Sealing sealing is carried out after at least 5min again, is completely exhausted out in battery under the premise of thus can not being extracted battery ensuring electrolyte
Gas, inside battery pressure is enable to keep high unity, improves the ownership of electrolyte in battery, so as to ensure that electricity
The capacity and service life in pond, while also ensure that cell shapes do not change.Also, the technological parameter setting of the above method is closed
Reason can effectively reduce environment influence in vacuum environment；It is easy to operate, quickly closed environment can be optimized；It is applicable in
In batch production, ensure to provide foundation to single battery sealing sealing while product quality requirement.
Preferably, the value of the negative pressure is -50KPa.
Preferably, the 7~15min of negative pressure is kept.By will again be sealed after 7~15min of battery standing in vacuum environment
Mouthful, the gas in battery can be more completely discharged in this way.
Preferably, the negative pressure 10min is kept.
Preferably, the shape of the battery is cylinder or three-dimensional annulus.
Preferably, the battery is lithium ion battery.
Preferably, the shell material of the battery is aluminium.By using aluminum housing, it can be resistant to battery higher
Vacuum degree, so as to ensure that cell shapes do not change.
Preferably, the battery has been subjected to chemical conversion treatment.By the way that vacuum seal, such energy will be first carried out after Battery formation again
Enough ensure that battery exists inside it in use almost without gas, so as to ensure that the capacity of battery and service life.
Specific embodiment
Technical scheme of the present invention will be clearly and completely described below, it is clear that described embodiment is this hair
Bright part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
All other embodiments obtained under the premise of creative work are made, shall fall within the protection scope of the present invention.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It can be combined with each other into conflict.
Embodiment 1
Battery vacuum seal method provided in this embodiment, including：
Battery to be sealed is held in closed container, vacuum degree is evacuated to and reaches -40KPa, after standing 15min,
Sealing sealing is carried out to the liquid injection hole of battery using water-tight equipment in the vacuum environment again；
Battery in the present embodiment is the aluminum shell column lithium ion battery for having been subjected to chemical conversion treatment, using ternary material as just
Pole material, lithium titanate are negative material.
Embodiment 2
Battery vacuum seal method provided in this embodiment, including：
Battery to be sealed is held in closed container, vacuum degree is evacuated to and reaches -60KPa, after standing 5min, then
Sealing sealing is carried out to the liquid injection hole of battery using water-tight equipment in the vacuum environment；
Battery in the present embodiment is the aluminum hull solid circular ring shape lithium ion battery for having been subjected to chemical conversion treatment, with ternary material
Expect that for positive electrode, lithium titanate is negative material.
Embodiment 3
Battery vacuum seal method provided in this embodiment, including：
Temperature be 25 DEG C in the environment of the battery of 36 same compositions and size is held in closed container, then with-
The pressure of 50KPa is vacuumized, and pressure gauge is made to reach -50KPa, is stood 10min, is then set under the vacuum degree using sealing
It is standby that sealing sealing is carried out to battery；
Battery in the present embodiment is the aluminum shell column lithium ion battery for having been subjected to chemical conversion treatment, using ternary material as just
Pole material, lithium titanate are negative material.
Embodiment 4
Battery vacuum seal method provided in this embodiment, including：
Battery to be sealed is held in closed container, vacuum degree is evacuated to and reaches -45KPa, after standing 7min, then
Sealing sealing is carried out to the liquid injection hole of battery using water-tight equipment in the vacuum environment；
Battery in the present embodiment is the aluminum shell column lithium ion battery for having been subjected to chemical conversion treatment, using ternary material as just
Pole material, lithium titanate are negative material.
Embodiment 5
Battery vacuum seal method provided in this embodiment, including：
Battery to be sealed is held in closed container, vacuum degree is evacuated to and reaches -55KPa, after standing 9min, then
Sealing sealing is carried out to the liquid injection hole of battery using water-tight equipment in the vacuum environment；
Battery in the present embodiment is the aluminum hull solid circular ring shape lithium ion battery for having been subjected to chemical conversion treatment, with ternary material
Expect that for positive electrode, lithium titanate is negative material.
Embodiment 6
Battery vacuum seal method provided in this embodiment, including：
Battery to be sealed is held in closed container, vacuum degree is evacuated to and reaches -50KPa, after standing 8min, then
Sealing sealing is carried out to the liquid injection hole of battery using water-tight equipment in the vacuum environment；
Battery in the present embodiment is the aluminum hull square lithium ion battery for having been subjected to chemical conversion treatment, using ternary material as just
Pole material, lithium titanate are negative material.
Comparative example 1
Battery vacuum seal method provided in this embodiment, including：
Temperature be 25 DEG C in the environment of the battery of 36 same compositions and size is held in closed container, then with-
The pressure of 39KPa is vacuumized, and pressure gauge is made to reach -39KPa, is stood 10min, is then set under the vacuum degree using sealing
It is standby that sealing sealing is carried out to battery；
Battery in this comparative example is the aluminum shell column lithium ion battery for having been subjected to chemical conversion treatment, using ternary material as just
Pole material, lithium titanate are negative material.
Comparative example 2
Battery vacuum seal method provided in this embodiment, including：
Temperature be 25 DEG C in the environment of the battery of 36 same compositions and size is held in closed container, then with-
The pressure of 60KPa is vacuumized, and pressure gauge is made to reach -60KPa, stands 4.5min, and sealing is then used under the vacuum degree
Equipment carries out sealing sealing to battery；
Battery in this comparative example is the aluminum shell column lithium ion battery for having been subjected to chemical conversion treatment, using ternary material as just
Pole material, lithium titanate are negative material.
Experimental example 1
It the phenomenon that when record uses the method for the embodiment of the present invention 3 to 36 batteries progress vacuum seals respectively, as a result shows
Show, above-mentioned 36 batteries do not occur the situation that electrolyte is extracted；It is and above-mentioned compared with the battery case size before sealing
The shell sizes of 36 batteries have no significant change.This absolutely proves, method of the invention can not only ensure electrolyte not by
Extract out battery, while can also cell shapes do not change.
Experimental example 2
Each 5 of the battery obtained by the embodiment of the present invention 3, comparative example 1, comparative example 2 is taken respectively, is surveyed using U.S. ARBIN
It tries instrument and carries out IC charge-discharge performance tests, as a result, it has been found that, the discharge capacity after the battery 400 that embodiment 3 obtains recycles is divided
Not Wei initial capacity 99.2%, 99.5%, 98.9%, 99.1%, 99.3%, and comparative example 1 obtain battery 400 recycle after
Discharge capacity be respectively 85.2%, 84.5%, 84.4%, 85.1%, the 85.0% of initial capacity, comparative example 2 obtain electricity
Discharge capacity after pond 400 recycles is respectively 88.5%, 88.2%, 89.4%, 88.7%, the 88.1% of initial capacity.Thus
Illustrate, method of the invention can be completely exhausted out the gas in battery, so that it is guaranteed that the cycle performance of battery.
Obviously, the above embodiments are merely examples for clarifying the description, and is not intended to limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And the obvious variation thus extended out or
Among changing still in the protection domain of the invention.
Claims (8)
1. a kind of vacuum seal method of battery, including,
The battery vacuum-pumping of sealing is treated to negative pressure, and keeps the negative pressure at least 5min；
Sealing sealing is carried out to the battery under the condition of negative pressure；
Wherein, the value of the negative pressure is -40KPa~-60KPa.
2. the vacuum seal method of battery according to claim 1, which is characterized in that the value of the negative pressure is -50KPa.
3. the vacuum seal method of battery according to claim 1 or 2, which is characterized in that keep the negative pressure 7~
15min。
4. according to the vacuum seal method of claim 1-3 any one of them batteries, which is characterized in that keep the negative pressure
10min。
5. according to the vacuum seal method of claim 1-4 any one of them batteries, which is characterized in that the shape of the battery
For cylinder or three-dimensional annulus.
6. according to the vacuum seal method of claim 1-5 any one of them batteries, which is characterized in that the battery for lithium from
Sub- battery.
7. according to the vacuum seal method of claim 1-6 any one of them batteries, which is characterized in that the housing of the battery
Material is aluminium.
8. according to the vacuum seal method of claim 1-7 any one of them batteries, which is characterized in that the battery has been subjected to
Chemical conversion treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711395432.7A CN108199085A (en) | 2017-12-21 | 2017-12-21 | A kind of lithium ion battery vacuum seal method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711395432.7A CN108199085A (en) | 2017-12-21 | 2017-12-21 | A kind of lithium ion battery vacuum seal method |
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| Publication Number | Publication Date |
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| CN108199085A true CN108199085A (en) | 2018-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711395432.7A Pending CN108199085A (en) | 2017-12-21 | 2017-12-21 | A kind of lithium ion battery vacuum seal method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808122A (en) * | 2018-07-24 | 2018-11-13 | 苏州宇量电池有限公司 | A kind of the electrification sealing preparation method and lithium ion battery of lithium ion battery |
| CN115441061A (en) * | 2022-08-16 | 2022-12-06 | 湖北钛时代新能源有限公司 | Composite titanium lithium ion battery, negative pressure sealing method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1705144A (en) * | 2004-06-01 | 2005-12-07 | 肇庆市风华锂电池有限公司 | Method and apparatus for battery vacuum sealing |
| CN1797835A (en) * | 2004-12-28 | 2006-07-05 | 天津力神电池股份有限公司 | Vacuum seal method of square shaped lithium ion secondary battery |
| CN101212037A (en) * | 2006-12-31 | 2008-07-02 | 上海比亚迪有限公司 | Battery electrolyte filling method |
| CN106848411A (en) * | 2017-02-16 | 2017-06-13 | 中天储能科技有限公司 | A kind of normal pressure chemical component negative pressure seals preparation method of lithium ion battery |
-
2017
- 2017-12-21 CN CN201711395432.7A patent/CN108199085A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1705144A (en) * | 2004-06-01 | 2005-12-07 | 肇庆市风华锂电池有限公司 | Method and apparatus for battery vacuum sealing |
| CN1797835A (en) * | 2004-12-28 | 2006-07-05 | 天津力神电池股份有限公司 | Vacuum seal method of square shaped lithium ion secondary battery |
| CN101212037A (en) * | 2006-12-31 | 2008-07-02 | 上海比亚迪有限公司 | Battery electrolyte filling method |
| CN106848411A (en) * | 2017-02-16 | 2017-06-13 | 中天储能科技有限公司 | A kind of normal pressure chemical component negative pressure seals preparation method of lithium ion battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808122A (en) * | 2018-07-24 | 2018-11-13 | 苏州宇量电池有限公司 | A kind of the electrification sealing preparation method and lithium ion battery of lithium ion battery |
| CN115441061A (en) * | 2022-08-16 | 2022-12-06 | 湖北钛时代新能源有限公司 | Composite titanium lithium ion battery, negative pressure sealing method and device |
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Application publication date: 20180622 |