CN105870390A - Chamfered edge tab of EV lithium battery and fabrication method of chamfered edge tab - Google Patents
Chamfered edge tab of EV lithium battery and fabrication method of chamfered edge tab Download PDFInfo
- Publication number
- CN105870390A CN105870390A CN201610251254.XA CN201610251254A CN105870390A CN 105870390 A CN105870390 A CN 105870390A CN 201610251254 A CN201610251254 A CN 201610251254A CN 105870390 A CN105870390 A CN 105870390A
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- Prior art keywords
- chamfered edge
- metallic conductor
- lithium battery
- thickness
- lug
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a chamfered edge tab of an EV lithium battery and a fabrication method of the chamfered edge tab. Two side edges of a metal conductor adopt a chamfered edge design so as to form a shape whose thickness of the chamfered edge is gradually increased from outside to inside and whose the upper surface and the lower surface are inclined surfaces symmetric to each other; through the chamfered edge design, namely, the thinning processing on the two side edges of the metal conductor, the end surface thickness of the side edges of the metal conductor of the tab is effectively controlled, and the phenomenon that bubbles are easy to generate at the side edges during the heat-sealing process is avoided; the thickness of the side surface of the metal conductor is thinned, the thickness of the insulation layer at the side edge after heat-sealing relatively becomes thick, and the phenomenon that the insulation layers at the upper position and the lower position of a triangular belt on the side surface are thinner can be effectively prevented; and moreover, four right angles of the tab are changed to round angles, and the phenomena that the two end surfaces of the tab are scratched with each other and a battery package film is scratched or damaged by the end surfaces can be effectively prevented.
Description
Technical field
The present invention relates to foil process tool, more particularly, it relates to a kind of EV lithium battery chamfered edge lug
And preparation method thereof.
Background technology
Using the automobile of regular gasoline engine, its engine power is generally at 30-300KW, and electric
Electrical automobile (containing electrocar and electric bus) is then with lithium battery (commonly referred to as " EV lithium battery ")
Being driven, this lithium battery need to have more high magnification, more than compact electric apparatus lithium batteries such as regular handsets
Large Copacity, it uses feature to be to use that (typically single battery be unified into group meets output in groups
The needs that electric current is big, group is connected into big group, meets the needs of output voltage), the requirement to battery
There are two aspects extremely important: 1, security, owing to being to use in groups, appointing in any group of battery
What battery goes wrong, and all can affect the safety traffic of whole automobile, therefore, to each electricity
The security requirement in pond is the highest, and 2, battery multiplying power is high, capacity big, adapts to big electric current charge and discharge.
Therefore, the lead-in wire of EV lithium battery (has another name called lug, point positive and negative pole, it will usually enter according to lug material
Row classification, such as: aluminium pole ears, nickel-clad copper lug, nickel lug etc.) width and thickness all ratios the least
Type electrical equipment or use for electronic products battery pole ear are much larger, common compact electrical equipment or use for electronic products battery pole
The width of ear is generally at below 10mm, and thickness is about 0.1mm, and the width of EV lithium battery pole ear
Degree is more than 35mm (at present be the most frequently used with 60mm), and thickness is 0.2-0.5mm, and lug exists
Effect in battery is sealing, insulate and conduct electricity.Its sealing and insulation are key performances, sealing
Battery failure the most whole with failure of insulation.
Referring to shown in Fig. 1～Fig. 2, the traditional structural design of battery pole ear is: include metallic conductor 1,
Polymer insulating film 2 (having another name called tab), wherein, metallic conductor 1 is rectangular patch, macromolecule
Dielectric film 2 is solid-state banding, after 140 degree～160 degree are heated, laterally with metallic conductor about 1
Surface is bonded together (commonly referred to as heat-sealing).In order to ensure the performance of lug, in heat seal process, need
The profile of polymer insulating film 2 to be kept can not have big change.Further, since polymer insulating film
The mobility of the mobility relative thermal sealing of 2 high temperature functional layers is poor, and fusing point to exceed more than 30 DEG C.
Therefore, easy and metallic conductor 1 two sides the region, V-belt of the polymer insulating film 2 after heat-sealing (is schemed
At a in 2) easily form bubble, and metallic conductor 1 thickness is the thickest, bubble is the most serious, product
That scraps is the most.It addition, metallic conductor 1 thickness of lug is the thickest, then on metallic conductor 1 two sides
Polymer insulating film 2 thickness of lower position (at the b in Fig. 2) is the thinnest, thus affects lug
Sealing property.Moreover, for two end faces (welding ends and exposed junction) of metallic conductor 1, i.e. its
Four angles, due to very sharp-pointed, therefore in lug manufacture process, the most mutually scratch metallic conductor 1 or
Polymer insulating film 2, affects the presentation quality performance of product.The more important thing is, made at battery
Cheng Zhong, easily scratches or scratches the wrapping film of battery, thus affect the security performance of battery.
Summary of the invention
For disadvantages mentioned above present in prior art, it is an object of the invention to provide a kind of EV lithium battery
Chamfered edge lug and preparation method thereof, it is possible to be prevented effectively from side in heat seal process and air blister defect occurs.
For achieving the above object, the present invention adopts the following technical scheme that
On the one hand, a kind of EV lithium battery chamfered edge lug, including metallic conductor and the horizontal warm of rectangular patch
The polymer insulating film of the solid-state banding being encapsulated on metallic conductor, the dual-side of described metallic conductor is adopted
Designing with chamfered edge, to be formed, ecto-entad gradient thickness at chamfered edge is big and upper and lower surface is for symmetrical inclined-plane
Shape.
Outermost end thickness H at described chamfered edge is 0.05～0.15mm, horizontal at described chamfered edge
Length L is 0.5 ± 0.2mm.
Four angles of described metallic conductor are fillet.
On the other hand, the preparation method of a kind of EV lithium battery chamfered edge lug, comprise the following steps:
A. the dual-side of the metallic conductor of rectangular patch is carried out chamfered edge process, to be formed at chamfered edge by outward
The shape that inwardly gradient thickness is big and upper and lower surface is symmetrical inclined-plane；
B. by polymer insulating film transversal heat seal on metallic conductor.
Described chamfered edge is processed as using edge tool that the dual-side of metallic conductor is carried out chamfered edge, and feed is deep
It is 0.05～0.15mm that degree controls the edge outermost end thickness after 0.5 ± 0.2mm, chamfered edge.
Also include step C, the four of metallic conductor angles are made as fillet.
In technique scheme, EV lithium battery chamfered edge lug of the present invention and preparation method thereof have with
Under several advantages:
1, metallic conductor is used chamfered edge design, the i.e. thinning process of metallic conductor dual-side thus effective
The end surface thickness of the metallic conductor side controlling lug, therefore avoid side in heat seal process easy
The phenomenon of bubble occurs.
2, due to the lower thickness of metallic conductor side, the thickness of insulating barrier of back side edge is therefore sealed then
The most thickening, the phenomenon that the insulating barrier of V-belt, side upper-lower position is the thinnest can be prevented effectively from.
3, use the four of lug right angles instead fillet design, mutually drawing of lug both ends of the surface can be prevented effectively from
Wound and end face are to the scuffing of battery packaging film or the phenomenon such as scratch.
Accompanying drawing explanation
Fig. 1 is the structural representation of the EV lithium battery pole ear of prior art；
Fig. 2 is the A portion enlarged section schematic diagram in Fig. 1；
Fig. 3 is the structural representation of the EV lithium battery chamfered edge lug of the present invention；
Fig. 4 is the A portion enlarged section schematic diagram in Fig. 3.
Detailed description of the invention
Technical scheme is further illustrated below in conjunction with the accompanying drawings with embodiment.
Referring to shown in Fig. 3～Fig. 4, the EV lithium battery chamfered edge lug of the present invention is same as the prior art
, the most also include metallic conductor 1 and transversal heat seal the consolidating on metallic conductor 1 of rectangular patch
The polymer insulating film 2 of state banding.Except for the difference that, the dual-side of described metallic conductor 1 uses and cuts
Limit is designed, and the dual-side of metallic conductor 1 will carry out thinning process, thus can effectively control lug
End surface thickness H of metallic conductor 1 side, therefore can avoid side in heat seal process that bubble easily occurs
Phenomenon.By repetition test and research, the following chamfered edge of final acquisition is shaped as preferably: i.e. at chamfered edge
Big in ecto-entad gradient thickness and that upper and lower surface is symmetrical inclined-plane shape.Due to metallic conductor 1
The lower thickness of side, therefore seals the thickness then phase of the insulating barrier (at the b in Fig. 4) of back side edge
To thickening, the phenomenon that the insulating barrier of V-belt, side upper-lower position is the thinnest can be prevented effectively from.
Further, obtained by repeated multiple times calculating and test, the outermost end thickness at described chamfered edge
(i.e. end surface thickness H) is 0.05～0.15mm, at described chamfered edge lateral length L be 0.5 ±
0.2mm is preferable.
It addition, four angles of described metallic conductor 1 are fillet, compared with traditional right angle, fillet
Design can be prevented effectively from lug both ends of the surface mutually scratch and end face to the scuffing of battery packaging film or is drawn
The phenomenon such as broken.
The preparation method of the EV lithium battery chamfered edge lug of the present invention and above-mentioned EV lithium battery chamfered edge lug
Spirit is identical, does not repeats them here.
In sum, EV lithium battery chamfered edge lug of the present invention and preparation method thereof, have following
Advantage:
1, use chamfered edge to design metallic conductor 1, i.e. the thinning process of metallic conductor 1 dual-side thus
It is effectively controlled the end surface thickness of metallic conductor 1 side of lug, therefore avoids in heat seal process
Easily there is the phenomenon of bubble in side.
2, due to the lower thickness of metallic conductor 1 side, the thickness of the insulating barrier of back side edge is therefore sealed
The most thickening, the phenomenon that the insulating barrier of V-belt, side upper-lower position is the thinnest can be prevented effectively from.
3, use the four of lug right angles instead fillet design, mutually drawing of lug both ends of the surface can be prevented effectively from
Wound and end face are to the scuffing of battery packaging film or the phenomenon such as scratch.
4, it is not only applicable to design and the preparation of EV lithium battery pole ear, and is applied equally to other
The design of lug and preparation.
Those of ordinary skill in the art is it should be appreciated that above embodiment is intended merely to
The bright present invention, and it is not used as limitation of the invention, as long as at the spirit of the present invention
In, change, the modification of embodiment described above all will be fallen in the range of claims of the present invention.
Claims (6)
1. an EV lithium battery chamfered edge lug, including the metallic conductor of rectangular patch and transversal heat seal in
The polymer insulating film of the solid-state banding on metallic conductor, it is characterised in that: described metallic conductor
Dual-side uses chamfered edge design, and to be formed at chamfered edge, ecto-entad gradient thickness is big and upper and lower surface is right
The shape on the inclined-plane claimed.
2. EV lithium battery chamfered edge lug as described in claim 1, it is characterised in that:
Outermost end thickness at described chamfered edge is 0.05～0.15mm, lateral length at described chamfered edge
It is 0.5 ± 0.2mm.
3. the EV lithium battery chamfered edge lug as described in claim 1 or 2, it is characterised in that:
Four angles of described metallic conductor are fillet.
4. the preparation method of an EV lithium battery chamfered edge lug, it is characterised in that comprise the following steps:
A. the dual-side of the metallic conductor of rectangular patch is carried out chamfered edge process, to be formed at chamfered edge by outward
The shape that inwardly gradient thickness is big and upper and lower surface is symmetrical inclined-plane；
B. by polymer insulating film transversal heat seal on metallic conductor.
5. EV lithium battery chamfered edge lug as described in claim 4, it is characterised in that:
Described chamfered edge is processed as using edge tool that the dual-side of metallic conductor is carried out chamfered edge, and feed is deep
It is 0.05～0.15mm that degree controls the edge outermost end thickness after 0.5 ± 0.2mm, chamfered edge.
6. EV lithium battery chamfered edge lug as described in claim 4, it is characterised in that:
Also include step C, the four of metallic conductor angles are made as fillet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610251254.XA CN105870390A (en) | 2016-04-21 | 2016-04-21 | Chamfered edge tab of EV lithium battery and fabrication method of chamfered edge tab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610251254.XA CN105870390A (en) | 2016-04-21 | 2016-04-21 | Chamfered edge tab of EV lithium battery and fabrication method of chamfered edge tab |
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| Publication Number | Publication Date |
|---|---|
| CN105870390A true CN105870390A (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610251254.XA Pending CN105870390A (en) | 2016-04-21 | 2016-04-21 | Chamfered edge tab of EV lithium battery and fabrication method of chamfered edge tab |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285987A (en) * | 2018-08-21 | 2019-01-29 | 厦门纬达科技有限公司 | A kind of soft package lithium ion cell polar ear and preparation method thereof |
| CN110178247A (en) * | 2016-11-04 | 2019-08-27 | 株式会社杰士汤浅国际 | The manufacturing method of charge storage element electrode, charge storage element and charge storage element electrode |
| CN112531296A (en) * | 2020-11-26 | 2021-03-19 | 惠州亿纬集能有限公司 | Tab and soft package battery |
| CN113410520A (en) * | 2020-03-15 | 2021-09-17 | 深圳格林德能源集团有限公司 | Method for improving heat abuse safety performance of flexible package lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202142602U (en) * | 2011-07-20 | 2012-02-08 | 范能文 | Thick lug of soft package lithium battery |
| CN105070873A (en) * | 2015-07-20 | 2015-11-18 | 无锡市百事杰金属制品科技有限公司 | Lithium-ion power battery tab |
| CN205609654U (en) * | 2016-04-21 | 2016-09-28 | 格远电子科技（上海）有限公司 | EV lithium cell edging utmost point ear |
-
2016
- 2016-04-21 CN CN201610251254.XA patent/CN105870390A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202142602U (en) * | 2011-07-20 | 2012-02-08 | 范能文 | Thick lug of soft package lithium battery |
| CN105070873A (en) * | 2015-07-20 | 2015-11-18 | 无锡市百事杰金属制品科技有限公司 | Lithium-ion power battery tab |
| CN205609654U (en) * | 2016-04-21 | 2016-09-28 | 格远电子科技（上海）有限公司 | EV lithium cell edging utmost point ear |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110178247A (en) * | 2016-11-04 | 2019-08-27 | 株式会社杰士汤浅国际 | The manufacturing method of charge storage element electrode, charge storage element and charge storage element electrode |
| CN109285987A (en) * | 2018-08-21 | 2019-01-29 | 厦门纬达科技有限公司 | A kind of soft package lithium ion cell polar ear and preparation method thereof |
| CN113410520A (en) * | 2020-03-15 | 2021-09-17 | 深圳格林德能源集团有限公司 | Method for improving heat abuse safety performance of flexible package lithium ion battery |
| CN113410520B (en) * | 2020-03-15 | 2022-10-28 | 深圳格林德能源集团有限公司 | Method for improving heat abuse safety performance of flexible package lithium ion battery |
| CN112531296A (en) * | 2020-11-26 | 2021-03-19 | 惠州亿纬集能有限公司 | Tab and soft package battery |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160817 |
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| RJ01 | Rejection of invention patent application after publication |