CN209675366U - Battery mylar film and stack type lithium ion battery - Google Patents
Battery mylar film and stack type lithium ion battery Download PDFInfo
- Publication number
- CN209675366U CN209675366U CN201920799012.3U CN201920799012U CN209675366U CN 209675366 U CN209675366 U CN 209675366U CN 201920799012 U CN201920799012 U CN 201920799012U CN 209675366 U CN209675366 U CN 209675366U
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- Prior art keywords
- battery
- plate
- protrusion
- mylar film
- annular protrusion
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- 229920002799 BoPET Polymers 0.000 title claims abstract description 54
- 239000005041 Mylar™ Substances 0.000 title claims abstract description 54
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 19
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 241000209140 Triticum Species 0.000 description 2
- 235000021307 Triticum Nutrition 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 150000003503 terephthalic acid derivatives Chemical class 0.000 description 2
- 102000004310 Ion Channels Human genes 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000008961 swelling 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
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- Secondary Cells (AREA)
Abstract
The utility model discloses a kind of battery mylar films, are plane with the plate-like portion for offseting with battery core including medial surface, the lateral surface of the plate-like portion has the annular protrusion arranged along the plate-like portion edge and the middle part being arranged in the middle part of annular protrusion protrusion.With in battery core use process, when pole piece dilatancy, at this time annular protrusion can effectively by offseting with case inside wall, to prevent the surrounding of battery core from deforming, and then effectively prevent that the pole piece edge of battery core separates and caused by poor contact.There are above-mentioned annular protrusion and middle part protrusion mylar film is integrally disposed simultaneously, so that protrusion follows mylar film size to be arranged, while installing very convenient, and then be effectively prevented from increase process.The invention also discloses a kind of stack type lithium ion batteries including above-mentioned battery mylar film.
Description
Technical field
The utility model relates to battery technology fields to further relate to a kind of packet more specifically to a kind of battery mylar film
Include the stack type lithium ion battery of above-mentioned battery mylar film.
Background technique
Lithium ion battery has capacity big, light-weight, has extended cycle life, and energy density is high, without memory and to environment
Many advantages, such as friendly, therefore be widely used in electric car, electric bicycle, the fields such as energy-storage system.It is wherein rectangular
Stack type lithium ion battery, including battery core, battery core are stacked to type generally by plate core, in the two sides of battery core thickness direction
It can be generally provided with mylar film, by mylar film insulation protection, package protection is then carried out by shell, wherein shell is generally
Rectangular shell, generally iron-clad or aluminum hull.Wherein mylar film is generally slab construction, the effect of insulation protection is functioned only as, in reality
In the application of border, it has been difficult to meet the requirements.
The naked battery core edge of its internal laminations formula is usually to be bonded by conventional gummed paper, and gummed paper long period of soaking is electrolysed
In liquid, the viscosity that will lead to gummed paper is lower, to influence naked battery core stickiness, causes stacked naked battery core edge fitting unstable,
So that generating gap between positive plate, negative electrode tab and diaphragm, increase ion channel, to reduce the electrical property of lithium ion battery
Energy.
In conclusion how to efficiently solve, mylar film is had a single function, the pole piece of battery core is easily separated from asking for contact
Topic, is current those skilled in the art's urgent problem.
Utility model content
In view of this, first of the utility model is designed to provide a kind of battery mylar film, which can
It is had a single function with efficiently solving mylar film, the problem of pole piece of battery core is easily separated from contact, second mesh of the utility model
Be to provide a kind of stack type lithium ion battery including above-mentioned battery mylar film.
In order to reach above-mentioned first purpose, the utility model is provided the following technical solutions:
A kind of battery mylar film is plane with the plate-like portion for offseting with battery core including medial surface, the plate-like portion
Lateral surface has the annular protrusion arranged along the plate-like portion edge and the middle part being arranged in the middle part of annular protrusion protrusion.
In the battery mylar film, it is provided with annular protrusion along edge in the lateral surface of plate-like portion, to use in battery core
In the process, when pole piece dilatancy, annular protrusion can be effectively by offseting, to prevent battery core with case inside wall at this time
Surrounding deformation, and then effectively prevent battery core pole piece edge separate and caused by poor contact.It is swollen in the surrounding of battery core
It is swollen to be limited, and to middle part swell when, be now placed in middle part middle part protrusion can effectively act as prevent effect.Exist simultaneously
Mylar film is integrally disposed above-mentioned annular protrusion and middle part protrusion, so that protrusion follows mylar film size to be arranged, not only
Annular protrusion size and middle part bump sizes are efficiently controlled, while installing very convenient, and then are effectively prevented from increase work
Sequence.In conclusion the battery mylar film can efficiently solve, mylar film is had a single function, the pole piece of battery core is easily separated from contact
Problem.
Preferably, multiple middle part protrusions gap setting and are set side by side along its length, and each middle part is convex
It rises and extends in the width direction.
Preferably, the annular protrusion cross section is in gradually wealthy type from outside to inside.
Preferably, the annular protrusion cross section is in semi-circular or isosceles trapezoid.
Preferably, the cross-sectional width of the middle part protrusion be greater than the annular protrusion cross-sectional width, and it is described in
The lateral surface of portion's protrusion is biased to inside setting relative to the lateral surface of the annular protrusion.
Preferably, the annular protrusion is greater than four hem width degrees in the transverse width of rectangle frame-type and four corners position.
Preferably, the annular protrusion and the plate-like portion are integrally formed, and the plate-like portion is PET sheet shape portion, it is described in
Portion's protrusion is PET protrusion.
Preferably, including two plate-like portions, length direction one end edge of one of them plate-like portion and another institute
It states to be integrally formed between length direction one end edge of plate-like portion by connection sheet and connect；In width direction two sides, described in two
The corresponding sides edge of plate-like portion is provided with and can bend to be enclosed in the bound edge of the battery core side, the width of the bound edge and institute
The width for stating connection sheet is equal.
In order to reach above-mentioned second purpose, the utility model additionally provides a kind of stack type lithium ion battery, the lamination
Formula lithium ion battery includes any of the above-described kind of battery mylar film, further includes shell, and case inside is provided with battery core, battery mylar film
Two plate-like portions be separately positioned on the two sides in the cell thickness direction, and inside offsets with the battery core, the ring in outside
Shape protrusion offsets with inner walls.Since above-mentioned battery mylar film has above-mentioned technique effect, there is the battery mylar film
Stack type lithium ion battery should also have corresponding technical effect.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of battery mylar film provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram of stack type lithium ion battery provided by the embodiment of the utility model.
It is marked in attached drawing as follows:
Plate-like portion 1, annular protrusion 2, middle part protrusion 3, battery core 4, shell 5, connection sheet 6, bound edge 7.
Specific embodiment
The utility model embodiment discloses a kind of battery mylar film, which can efficiently solve mylar film
It has a single function, the problem of pole piece of battery core is easily separated from contact.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-Fig. 2 is please referred to, Fig. 1 is the structural schematic diagram of battery mylar film provided by the embodiment of the utility model；Fig. 2 is
The structural schematic diagram of stack type lithium ion battery provided by the embodiment of the utility model.
In a specific embodiment, a kind of battery mylar film is present embodiments provided, the battery mylar film is for placing
It in exposed 4 two sides of battery core, and is the two sides on thickness direction, battery mylar film is a kind of corrosion-resistant laminated structure, especially excellent
Choosing can hydrofluoric acid corrosion resistance, specific material can refer to technology, preferably sample a kind of PET mylar film.Specifically, the wheat is drawn
Piece includes plate-like portion 1, annular protrusion 2 and middle part protrusion 3.
Wherein the medial surface of plate-like portion 1 is plane, and to be fitted in exposed 4 outer surface of battery core, generally finishing plane has electricity
Core contacts by side, and the another side of plate-like portion 1, i.e. lateral surface are then not necessarily to excessively require flatness, flatness and surface light
Slippery can be less than medial surface.Wherein plate-like portion 1 is generally rectangle, and is generally adapted with the size of battery core 4, thickness is general
Between 0.1 millimeter to 1.5 millimeters, other sizes such as length can be adjusted according to the size of battery core.
The lateral surface of plate-like portion 1 is provided with the annular protrusion 2 arranged along 1 edge of plate-like portion and is arranged in annular protrusion 2
Middle part middle part protrusion 3.Wherein annular protrusion 2 is arranged along the edge of plate-like portion 1 to form ring-type, with during installation, annular
The lateral surface of protrusion 2 can offset with the shell 5 of stack type lithium ion battery, be pushed against with the edge to annular protrusion 2, with effective
Ground prevents 4 surrounding edge of battery core from swelling because of dilatancy.
Wherein the middle part of annular protrusion 2 is arranged in middle part protrusion 3, and the side of battery core 4 is resisted with the middle part in annular protrusion 2
Face, and then battery core 4 is prevented to swell around because surrounding is pressed.Wherein middle part protrusion 3 can be long strip type, be also possible to be in
It is round or rectangular.
In the battery mylar film, it is provided with annular protrusion 2 along edge in the lateral surface of plate-like portion 1, to exist in battery core 4
In use process, when pole piece dilatancy, annular protrusion 2 can be effectively by offseting, to prevent with 5 inner sidewall of shell at this time
The surrounding of battery core 4 deforms, so effectively prevent that the pole piece edge of battery core 4 separates and caused by poor contact.In battery core 4
Surrounding expansion limited, and to middle part swell when, be now placed in middle part middle part protrusion 3 can effectively act as prevent work
With.There are above-mentioned annular protrusion 2 and middle part protrusion 3 mylar film is integrally disposed simultaneously, not only efficiently controls 2 ruler of annular protrusion
Raised 3 size in very little and middle part, while installing very convenient, and then it is effectively prevented from increase process.In conclusion the battery wheat
Pulling-on piece can efficiently solve the problem of mylar film has a single function, the pole piece of battery core 4 is easily separated from contact.
Specifically, wherein middle part protrusion 3 can be monolith protrusion, in order to preferably play abutting effect, avoid simultaneously
It is excessive to power and lead to 5 deformed damaged of shell, preferably there are multiple middle part protrusions 3 herein, and multiple middle part protrusions 3 are along length side
It is set side by side to gap setting and along its length, and each middle part protrusion 3 extends in the width direction.Wherein length direction and
Width direction refers to the direction of entire battery mylar film, and wherein long side extending direction is length direction, short side extending direction
For width direction, if two perpendicular sides are equal, any one is long side, and corresponding another is short side.
Wherein the lateral surface of annular protrusion 2 mainly offsets with shell 5, with by offseting with battery case 5, to battery core 4
Edge formed support power or support force, in order to preferably protect battery core 4, preferred 2 cross section of annular protrusion is in from outside to inside herein
Gradually wealthy type, so that the joint face of annular protrusion 2 and plate-like portion 1, which is greater than, supports face with what shell 5 offseted.Peace can not only be facilitated
Dress, and facilitate manufacture.Specifically, wherein the cross section of annular protrusion 2 is preferably in semi-circular or isosceles ladder type.
Further, it is contemplated that when battery core 4 deforms, the degrees of expansion that quadrangle is born is bigger, therefore mylar film quadrangle is held
The dynamics received can be bigger, is based on this, and the transverse width preferably in the four corners position of the annular protrusion 2 of rectangle frame-type is big herein
In four hem width degrees, the corner receiving dynamics to guarantee annular protrusion 2 is bigger, to become along extending direction when there is flexible deformation
Shape degree is close to unanimously.
Further, when there is fever expansion deformation, middle part can be corresponded in the presence of deformation at this time, and the expansive force one at middle part
As it is bigger, in order to preferably limit, herein the cross-sectional width of preferred middle part protrusion 3 be greater than annular protrusion 2 cross section it is wide
Degree, so that the deformation extent at middle part is consistent with surrounding.Further, it is contemplated that protrusion 3 requirement in middle part is not very high, mainly
Edge part is prevented to deform, the lateral surface of preferred middle part protrusion 3 is biased to inside setting relative to the lateral surface of annular protrusion 2 herein.
It wherein can be adhesion between plate-like portion 1 and annular protrusion 2 and middle part protrusion 3 to fix, it is contemplated that annular protrusion 2
And the raised 3 materials requirement in middle part, required with the material to mylar film more identical, be based on this, herein preferably, annular protrusion with
Plate-like portion 1 is integrally formed, and plate-like portion therein 1 is PET sheet shape portion 1 (poly terephthalic acid class plastic sheet portion 1), and wherein
Middle part protrusion 3 be PET protrusion (poly terephthalic acid class plastics protrusion).
Mylar film generally comprises two plate-like portions 1, to be bonded 4 thickness direction two sides of battery core, one of plate-like portion 1 respectively
Another plate-like portion 1 of one end edge one end edge between connection is integrally formed by connection sheet 6, two plate-like portions 1 and even
Generally be flexible coupling between contact pin so that plate-like portion 1 can opposing tab 6 between edge overturning so that connection sheet 6 paste
It closes in 4 side side of battery core, and then two plate-like portions 1 is enable to be fitted in 4 thickness direction two sides of battery core respectively.Specifically, such as
For rectangle battery core, length direction one end edge of one of plate-like portion 1 and the length direction one of another plate-like portion 1
End edge is integrally formed connection by connection sheet 6 between, and connection sheet can be made to be fitted in 4 length direction one end side of battery core,
And two plate-like portions 1 is enable to be fitted in battery core thickness direction two sides respectively.And in the two sides of width direction, two plate-like portions 1
Corresponding sides can bend to be enclosed in the bound edge 7 of 4 side of battery core, width and the connection sheet width phase of bound edge 7 along being provided with
Deng so that two corresponding bound edges 7 of plate-like portion 1, in package, overlapping packet is in battery core transverse sides.
The battery mylar film provided in based on the above embodiment, the utility model additionally provide a kind of laminated Li-ion electricity
Pond, the stack type lithium ion battery include any one battery mylar film in above-described embodiment, further include shell, case inside is set
It is equipped with battery core, two plate-like portions of battery mylar film are separately positioned on the two sides in the cell thickness direction, and inside is and institute
State that battery core offsets, the annular protrusion in outside offsets with inner walls.Since the stack type lithium ion battery uses above-mentioned reality
The battery mylar film in example is applied, so the beneficial effect of the stack type lithium ion battery please refers to above-described embodiment.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (9)
1. a kind of battery mylar film is plane with the plate-like portion for offseting with battery core including medial surface, which is characterized in that described
The lateral surface of plate-like portion have along annular protrusion that the plate-like portion edge arrange be arranged in the middle part of the annular protrusion
Portion's protrusion.
2. battery mylar film according to claim 1, which is characterized in that multiple middle part protrusions gap along its length
It is arranged and is set side by side, and each middle part protrusion extends in the width direction.
3. battery mylar film according to claim 2, which is characterized in that the annular protrusion cross section is in gradually from outside to inside
Wealthy type.
4. battery mylar film according to claim 3, which is characterized in that the annular protrusion cross section is in semi-circular or waits
Waist is trapezoidal.
5. battery mylar film according to claim 4, which is characterized in that the cross-sectional width of the middle part protrusion is greater than institute
The cross-sectional width of annular protrusion is stated, and the lateral surface of middle part protrusion is relative in the lateral surface deviation of the annular protrusion
Side setting.
6. battery mylar film according to claim 5, which is characterized in that the annular protrusion is in rectangle frame-type and four angles
The transverse width of portion position is greater than four hem width degrees.
7. battery mylar film according to claim 1-6, which is characterized in that the annular protrusion and the plate
Portion is integrally formed, and the plate-like portion is PET sheet shape portion, and the middle part protrusion is PET protrusion.
8. battery mylar film according to claim 1-6, which is characterized in that including two plate-like portions,
In lead between length direction one end edge of plate-like portion and length direction one end edge of another plate-like portion
It crosses connection sheet and is integrally formed connection；In width direction two sides, the corresponding sides edge of two plate-like portions is provided with and can bend
To be enclosed in the bound edge of the battery core side, the width of the bound edge is equal with the width of the connection sheet.
9. a kind of stack type lithium ion battery, including shell, the case inside is provided with battery core, which is characterized in that including such as
Two plate-like portions of the described in any item battery mylar films of claim 1-8, the battery mylar film are separately positioned on the electricity
The two sides of core thickness direction, and inside offsets with the battery core, the annular protrusion in outside offsets with the inner walls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920799012.3U CN209675366U (en) | 2019-05-29 | 2019-05-29 | Battery mylar film and stack type lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920799012.3U CN209675366U (en) | 2019-05-29 | 2019-05-29 | Battery mylar film and stack type lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209675366U true CN209675366U (en) | 2019-11-22 |
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ID=68575640
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920799012.3U Active CN209675366U (en) | 2019-05-29 | 2019-05-29 | Battery mylar film and stack type lithium ion battery |
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| CN (1) | CN209675366U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563628A (en) * | 2020-12-09 | 2021-03-26 | 维沃移动通信有限公司 | Battery module and electronic equipment |
-
2019
- 2019-05-29 CN CN201920799012.3U patent/CN209675366U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563628A (en) * | 2020-12-09 | 2021-03-26 | 维沃移动通信有限公司 | Battery module and electronic equipment |
| CN112563628B (en) * | 2020-12-09 | 2023-02-28 | 维沃移动通信有限公司 | Battery modules and electronics |
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