CN109768333A - It is a kind of improve lithium battery security performance method and lithium battery preparation method - Google Patents
It is a kind of improve lithium battery security performance method and lithium battery preparation method Download PDFInfo
- Publication number
- CN109768333A CN109768333A CN201910118014.6A CN201910118014A CN109768333A CN 109768333 A CN109768333 A CN 109768333A CN 201910118014 A CN201910118014 A CN 201910118014A CN 109768333 A CN109768333 A CN 109768333A
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- China
- Prior art keywords
- diaphragm
- pole piece
- battery
- beyond
- lithium battery
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- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000007731 hot pressing Methods 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000001932 seasonal effect Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000009466 transformation Effects 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
-
- 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
Landscapes
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
A kind of method improving battery safety and the preparation method of lithium battery enable at least one end of diaphragm extend beyond pole piece along the width direction of diaphragm when stacking diaphragm and pole piece, and the size that the diaphragm extends beyond the part of pole piece is greater than 3mm；Diaphragm and pole piece are made by battery core using takeup type technique or stacked technique；The part that diaphragm extends beyond pole piece is bonded together.The present invention extends beyond the length of pole piece by the way that diaphragm is appropriately extended, the part that will exceed is bonded together using modes such as hot pressing, the end of diaphragm is fixed outside battery core, diaphragm inwardly overturns the case where leading to battery short circuit generation when so as to avoid battery from falling, and greatly improves the security performance of battery.
Description
Technical field
The invention belongs to technical field of lithium ion more particularly to a kind of methods for improving lithium battery security performance.
Background technique
With the development of economy and society, all kinds of Portable mobile electronic devices are also more more and more universal.Battery is electrical type
One of core component of product, requirement of the people to the properties of battery, especially security performance are also higher and higher.Electronics produces
Product inevitably can may bring to battery mounted therein when product falls and hit there is a situation where falling in use
It hits, the internal structure of battery can be loosened because of being hit, and may cause the diaphragm fold inward of inside battery.By
Play a part of that battery positive and negative plate is isolated in the battery in diaphragm, will cause the positive and negative electrode of battery when diaphragm, which turns down, to be shifted
Piece is in contact, to form short circuit, may lead cells burst or explosion, brings adverse effect to the security performance of battery.
Summary of the invention
The purpose of the present invention is to provide one kind can improve the method for battery safety, can prevent battery diaphragm because
Falling fold leads to battery short circuit and bring safety problem.
Another object of the present invention is to provide a kind of preparation methods of lithium battery, and lithium battery can be improved in use process
In security performance.
In order to realize that above-mentioned first purpose, the present invention take following technical solution:
A method of improving battery safety, comprising the following steps:
When stacking diaphragm and pole piece, at least one end of diaphragm is enabled to extend beyond pole piece along the width direction of diaphragm, it is described every
The size that film extends beyond the part of pole piece is greater than 3mm；
Diaphragm and pole piece are made by battery core using takeup type technique or stacked technique；
The part that diaphragm extends beyond pole piece is bonded together.
From the above technical scheme, the present invention extends beyond the length of pole piece by the way that diaphragm is appropriately extended, and then will surpass
Part out is bonded together using modes such as hot pressing, fixes the end of diaphragm outside battery core, due to septum end quilt
Be fixed together, make its can not fold inward, lead to battery short circuit because diaphragm is inwardly overturn when so as to avoid battery from falling
The case where occur, greatly improve the security performance of battery；And the method for the present invention will not influence electricity without introducing other materials
Core inner structure will not generate other side reactions.
Further, it is 3~10mm that the diaphragm, which extends beyond the size of the part of pole piece,.
3~10mm is set by the length that diaphragm extends beyond pole piece, can both septum end be made effectively to be bonded in one
It rises, while too many production cost will not be increased.
Further, further include diaphragm cutting step, after the part that diaphragm extends beyond pole piece is bonded together, to every
Film is cut, and diaphragm is made to be less than 2mm beyond the length of the part of pole piece.
Diaphragm is cut beyond the length of pole piece, avoids the volume for increasing battery core.
Further, the lower end of diaphragm is enabled to extend beyond pole piece along the width direction of diaphragm.
Diaphragm is bonded in one end that battery is not provided with tab, facilitates technological operation.
Further, diaphragm is bonded together beyond the part of pole piece by the way of hot pressing.
Heat pressing process is simple, and can guarantee that septum end is well bonded to together, and stability is good.
In order to realize that above-mentioned first purpose, the present invention take following technical solution:
The preparation method of lithium battery, comprising the following steps:
Positive plate, negative electrode tab and diaphragm are provided；
Positive plate, diaphragm and negative electrode tab are successively stacked together, width of at least one end along diaphragm of seasonal diaphragm is stacked
Degree direction extends beyond pole piece, and the length that the diaphragm extends beyond the part of pole piece is greater than 3mm；
Diaphragm and pole piece are made by battery core using takeup type technique or stacked technique；
The part that diaphragm extends beyond pole piece is bonded together.
From the above technical scheme, diaphragm, is extended beyond the part of pole piece by the battery prepared using the method for the present invention
It is bonded together using modes such as hot pressing, fixes the end of diaphragm outside battery core, when so as to avoid battery from falling
Diaphragm inwardly overturns the case where leading to battery short circuit generation, improves the security performance of battery.
Detailed description of the invention
Fig. 1 is the stacked position schematic diagram of diaphragm of the present invention and negative electrode tab；
Fig. 2 is the schematic diagram of the battery core of the embodiment of the present invention；
Fig. 3 is the sectional view of battery core of embodiment of the present invention lower half portion；
Fig. 4 to fig. 6 is the schematic diagram for pressing each step of diaphragm；
Fig. 7 is the schematic diagram of another diaphragm pressing mode.
A specific embodiment of the invention is described in more detail below in conjunction with attached drawing
Specific embodiment
In order to above and other objects of the present invention, feature and advantage can be become apparent from, the embodiment of the present invention is cited below particularly,
It is described below in detail.
The battery core of lithium battery is generally made of positive and negative plate and diaphragm, and diaphragm is set between positive plate and negative electrode tab, layer
It stacks the pole piece set and diaphragm can be used the mode of winding and battery core is made, or battery core is made by the way of lamination.In order to be isolated
Generally negative electrode tab or positive plate can be completely covered for positive plate and negative electrode tab, diaphragm, i.e. area of the area of diaphragm greater than pole piece.
By taking negative electrode tab as an example, as shown in Figure 1, negative electrode tab 1 is placed on diaphragm 2, negative electrode tab 1, and diaphragm can be completely covered in diaphragm 2
2 width (size in direction shown in arrow in Fig. 1) is generally than width greatly at least 1mm~2mm of negative electrode tab 1, and diaphragm 2 is from width
Side extends above negative electrode tab 1, thereby may be ensured that positive plate and negative electrode tab are isolated by diaphragm.Under normal circumstances, positive and negative
Pole piece and diaphragm are to be pasted together, and will not be relatively moved, however when battery falls, it may be because of external impact
Inside battery structure is caused to loosen, diaphragm, positive and negative plate have the possibility relatively moved, and diaphragm is also possible to
Can in battery falling process fold inward, so as to cause at fold positive plate and negative electrode tab contact with each other, cause short circuit.
In order to avoid leading to battery short circuit because of diaphragm fold inward, basic ideas of the invention are made of: by diaphragm, pole piece
After battery core, the part by diaphragm along diaphragm width direction beyond pole piece is bonded together using modes such as hot pressing, and diaphragm extends super
After the end of pole piece is bonded together out, the end of each layer diaphragm, can not be inside due to being fixed together outside battery core
Fold occurs so as to avoid inwardly overturning the situation for leading to short circuit because of diaphragm.Since the width (area) of negative electrode tab is general
Greater than the width (area) of positive plate, therefore diaphragm can be set to extend beyond negative electrode tab at least 3mm in the direction of the width, from
It saves from the point of view of manufacturing cost, preferably 3~10mm, more preferably 3~5mm.
It is core of the invention thought above, following will be combined with the drawings in the embodiments of the present invention, to the embodiment of the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are only a part of the embodiments of the present invention, and
The embodiment being not all of.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work
Under the premise of the every other embodiment that obtains, shall fall within the protection scope of the present invention.
Below by specific embodiment and comparative example, the present invention is further illustrated.It is arrived used in following the description
Reagent, material and instrument such as not special explanation, are conventional reagent, conventional material and conventional instrument, commercially available
It obtains, related reagent can also be synthesized by conventional synthesis process and be obtained.
As shown in Fig. 2, the battery core 10 of the present embodiment lithium battery is made of winding process, tab is arranged in one end of battery core 10
11.For ease of description, the end for being located at the same side with tab of diaphragm is defined as upper end, then under the end of the other side is
End.The present embodiment makes the lower end of diaphragm 2 extend beyond negative electrode tab 10mm.As shown in figure 3, by positive plate 3, diaphragm 2 and bearing
After pole piece 1 successively stacks and winds battery core is made, the lower end of each circle diaphragm 2 all stretches out in battery core (negative electrode tab 1) outside.It will be hot
The direction shown in arrow along Fig. 4 of compression mould 20 is moved, and pushes diaphragm, the part for being exposed to diaphragm except battery core is bonded together
(Fig. 5), the end that metacneme is completed in hot pressing are laminated together (Fig. 6), and the end of each layer diaphragm presses together, so that diaphragm
It can not fold inward.Then it requires to cut diaphragm according to size, is less than diaphragm beyond the length of the part of pole piece
2mm is convenient for subsequent production.When pressing diaphragm, it can also be closed from two sides of diaphragm to intermediate pressure, as shown in Figure 7.
When being pressed to the end of diaphragm, hot pressing can be carried out together with battery core, when battery core thickness is thicker, can be used
Ladder heating platen continues hot pressing to battery core and diaphragm, is bonded together with guaranteeing that outermost diaphragm can also contact with each other, and
Outer diaphragm stretching is avoided excessively to cause to shift or crumple.Can also be first by after battery core hot pressing, then with mold heat is carried out to diaphragm
Pressure.Decide whether to cut the diaphragm being bonded together according to the length that diaphragm extends beyond negative electrode tab, when diaphragm extends
Length beyond negative electrode tab be 3~5mm when, can not have to cut diaphragm, when extending beyond 5mm or more, then need to diaphragm into
Row carries out the production of next process again after cutting.
Certainly, technical concept of the invention is not limited in above-described embodiment, can also design according to the present invention obtain
Many different concrete schemes, for example, the method for the present invention in addition to can be applied to takeup type technique preparation lithium battery on, can also
To be applied to the lithium battery of stacked technique preparation；Diaphragm lower end only can be extended beyond into the pressing portions of pole piece together,
The part that diaphragm both ends can also be extended beyond to pole piece all presses；It can be pressed with hot pressing die, it can also be with earnestly
Knife by diaphragm adhering together；Such as these change and equivalent transformation should be included in it is of the present invention within the scope of.
Claims (10)
1. a kind of method for improving battery safety, which comprises the following steps:
When stacking diaphragm and pole piece, at least one end of diaphragm is enabled to extend beyond pole piece along the width direction of diaphragm, the diaphragm prolongs
The size for stretching the part beyond pole piece is greater than 3mm；
Diaphragm and pole piece are made by battery core using takeup type technique or stacked technique；
The part that diaphragm extends beyond pole piece is bonded together.
2. improving the method for battery safety as described in claim 1, it is characterised in that: the diaphragm extends beyond pole piece
Part size be 3~10mm.
3. improving the method for battery safety as claimed in claim 2, it is characterised in that: it further include diaphragm cutting step,
After the part that diaphragm extends beyond pole piece is bonded together, diaphragm is cut, makes diaphragm beyond the length of the part of pole piece
Degree is less than 2mm.
4. the method for the improvement battery safety as described in claims 1 or 2 or 3, it is characterised in that: enable the lower end of diaphragm
Width direction along diaphragm extends beyond pole piece.
5. the method for the improvement battery safety as described in claims 1 or 2 or 3, it is characterised in that: by the way of hot pressing
Diaphragm is bonded together beyond the part of pole piece.
6. the preparation method of lithium battery, which comprises the following steps:
Positive plate, negative electrode tab and diaphragm are provided；
Positive plate, diaphragm and negative electrode tab are successively stacked together, stack at least one end of seasonal diaphragm along the width side of diaphragm
To pole piece is extended beyond, the length that the diaphragm extends beyond the part of pole piece is greater than 3mm；
Diaphragm and pole piece are made by battery core using takeup type technique or stacked technique；
The part that diaphragm extends beyond pole piece is bonded together.
7. the preparation method of lithium battery as claimed in claim 6, it is characterised in that: the diaphragm extends beyond the part of pole piece
Size be 3~10mm.
8. the preparation method of lithium battery as claimed in claim 7, it is characterised in that: further include diaphragm cutting step, by diaphragm
Extend beyond pole piece part be bonded together after, diaphragm is cut, is less than diaphragm beyond the length of part of pole piece
2mm。
9. the preparation method of the lithium battery as described in claim 6 or 7 or 8, it is characterised in that: enable the lower end of diaphragm along diaphragm
Width direction extend beyond pole piece.
10. the preparation method of the lithium battery as described in claim 6 or 7 or 8, it is characterised in that: will be every by the way of hot pressing
Film is bonded together beyond the part of pole piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118014.6A CN109768333A (en) | 2019-02-15 | 2019-02-15 | It is a kind of improve lithium battery security performance method and lithium battery preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118014.6A CN109768333A (en) | 2019-02-15 | 2019-02-15 | It is a kind of improve lithium battery security performance method and lithium battery preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109768333A true CN109768333A (en) | 2019-05-17 |
Family
ID=66456858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910118014.6A Pending CN109768333A (en) | 2019-02-15 | 2019-02-15 | It is a kind of improve lithium battery security performance method and lithium battery preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109768333A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504492A (en) * | 2019-08-28 | 2019-11-26 | 珠海冠宇电池有限公司 | It is a kind of to prevent from falling lithium battery of failure and preparation method thereof |
| CN111162323A (en) * | 2019-12-30 | 2020-05-15 | 东莞维科电池有限公司 | Winding type lithium ion battery cell and preparation method thereof |
| WO2023071541A1 (en) * | 2021-10-29 | 2023-05-04 | 宁德时代新能源科技股份有限公司 | Isolation film, secondary battery, battery module, battery pack and electrical apparatus |
| CN116130850A (en) * | 2023-04-13 | 2023-05-16 | 宁德新能源科技有限公司 | Secondary battery and electric equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2224514A1 (en) * | 2009-02-25 | 2010-09-01 | Fuji Jukogyo Kabushiki Kaisha | Electric Storage Device, And Production Method Thereof |
| CN104241598A (en) * | 2013-06-18 | 2014-12-24 | 赵军辉 | Composite negative electrode, preparation method of negative electrode and lithium-sulfur secondary battery with negative electrode |
| CN104485481A (en) * | 2014-12-04 | 2015-04-01 | 深圳市格瑞普电池有限公司 | Lithium ion battery cell and lithium ion battery with same |
| KR20160015769A (en) * | 2014-07-31 | 2016-02-15 | 주식회사 엘지화학 | A stack/folding type electrode assembly with safety improvement and a electrochemical cell comprising the same |
| CN107204415A (en) * | 2017-07-11 | 2017-09-26 | 力信（江苏）能源科技有限责任公司 | A kind of high temperature safe type battery core |
| CN108400274A (en) * | 2018-03-15 | 2018-08-14 | 重庆市紫建电子有限公司 | A kind of battery with diaphragm bag making |
| CN109244311A (en) * | 2017-07-10 | 2019-01-18 | 宁德新能源科技有限公司 | Battery core and energy storage device |
-
2019
- 2019-02-15 CN CN201910118014.6A patent/CN109768333A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2224514A1 (en) * | 2009-02-25 | 2010-09-01 | Fuji Jukogyo Kabushiki Kaisha | Electric Storage Device, And Production Method Thereof |
| CN104241598A (en) * | 2013-06-18 | 2014-12-24 | 赵军辉 | Composite negative electrode, preparation method of negative electrode and lithium-sulfur secondary battery with negative electrode |
| KR20160015769A (en) * | 2014-07-31 | 2016-02-15 | 주식회사 엘지화학 | A stack/folding type electrode assembly with safety improvement and a electrochemical cell comprising the same |
| CN104485481A (en) * | 2014-12-04 | 2015-04-01 | 深圳市格瑞普电池有限公司 | Lithium ion battery cell and lithium ion battery with same |
| CN109244311A (en) * | 2017-07-10 | 2019-01-18 | 宁德新能源科技有限公司 | Battery core and energy storage device |
| CN107204415A (en) * | 2017-07-11 | 2017-09-26 | 力信（江苏）能源科技有限责任公司 | A kind of high temperature safe type battery core |
| CN108400274A (en) * | 2018-03-15 | 2018-08-14 | 重庆市紫建电子有限公司 | A kind of battery with diaphragm bag making |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504492A (en) * | 2019-08-28 | 2019-11-26 | 珠海冠宇电池有限公司 | It is a kind of to prevent from falling lithium battery of failure and preparation method thereof |
| CN110504492B (en) * | 2019-08-28 | 2022-11-11 | 珠海冠宇电池股份有限公司 | Lithium battery capable of preventing falling failure and preparation method thereof |
| CN111162323A (en) * | 2019-12-30 | 2020-05-15 | 东莞维科电池有限公司 | Winding type lithium ion battery cell and preparation method thereof |
| WO2023071541A1 (en) * | 2021-10-29 | 2023-05-04 | 宁德时代新能源科技股份有限公司 | Isolation film, secondary battery, battery module, battery pack and electrical apparatus |
| CN116130850A (en) * | 2023-04-13 | 2023-05-16 | 宁德新能源科技有限公司 | Secondary battery and electric equipment |
| CN116130850B (en) * | 2023-04-13 | 2024-01-16 | 宁德新能源科技有限公司 | Secondary battery and electric equipment |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 209 No. 519180 Guangdong province Zhuhai city Doumen District Xinqing Science and Technology Industrial Park, Mount Everest Boulevard Applicant after: Zhuhai CosMX Battery Co.,Ltd. Address before: 209 No. 519180 Guangdong province Zhuhai city Doumen District Xinqing Science and Technology Industrial Park, Mount Everest Boulevard Applicant before: ZHUHAI COSLIGHT BATTERY Co.,Ltd. Address after: 209 No. 519180 Guangdong province Zhuhai city Doumen District Xinqing Science and Technology Industrial Park, Mount Everest Boulevard Applicant after: ZHUHAI COSLIGHT BATTERY Co.,Ltd. Address before: 209 No. 519180 Guangdong province Zhuhai city Doumen District Xinqing Science and Technology Industrial Park, Mount Everest Boulevard Applicant before: ZHUHAI COSLIGHT BATTERY Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190517 |