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CN204130623U - A kind ofly carry the pole piece of lug and use the lithium ion battery of this pole piece - Google Patents

A kind ofly carry the pole piece of lug and use the lithium ion battery of this pole piece Download PDF

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Publication number
CN204130623U
CN204130623U CN201420455111.7U CN201420455111U CN204130623U CN 204130623 U CN204130623 U CN 204130623U CN 201420455111 U CN201420455111 U CN 201420455111U CN 204130623 U CN204130623 U CN 204130623U
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CN
China
Prior art keywords
pole piece
district
active material
lithium ion
ion battery
Prior art date
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.)
Expired - Lifetime
Application number
CN201420455111.7U
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Chinese (zh)
Inventor
徐敖奎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhongtian Energy Storage Technology Co Ltd
Original Assignee
Zhongtian Energy Storage Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to CN201420455111.7U priority Critical patent/CN204130623U/en
Application granted granted Critical
Publication of CN204130623U publication Critical patent/CN204130623U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

The utility model is applicable to the technical field of lithium ion battery, disclose a kind of pole piece carrying lug, comprise pole piece base material, pole piece base material comprises pole piece active material district and stays white area, and pole piece active material is coated with pole piece active material layer in district, and pole piece base material also comprises PUR district, PUR district is positioned at the outside in pole piece active material district, stay white area to be positioned at the outside in PUR district, in PUR district, be coated with hot melt adhesive layer, hot melt adhesive layer is equally distributed polypropylene or polyethylene.A kind of lithium ion battery that the utility model provides, structure is simple, adopt the pole piece carrying lug, effectively prevent the operation of numerous and diverse welding electrode ear, make the performance of lithium ion battery splendid, be more suitable for jumbo lithium ion battery, meanwhile, using hot melt adhesive layer as insulating material, improve the insulation effect of pole piece, enhance the reliability of lithium ion battery, thus be beneficial to the combination property and the market competitiveness that improve lithium ion battery.

Description

A kind ofly carry the pole piece of lug and use the lithium ion battery of this pole piece
[technical field]
The utility model relates to lithium ion battery, particularly a kind ofly carries the pole piece of lug and uses the lithium ion battery of this pole piece.
[background technology]
Current lithium ion battery obtains multi-field use, particularly the stand-by power supply of large-scale energy storage field, the communications field, and wherein, electric automobile is to the demand expanding day of lithium ion battery.Therefore, the monomer capacity of lithium ion battery is from original hundreds of person of outstanding talent AH tens to hundreds of AH till now.High capacity lithium ion battery, because its production efficiency is high, battery performance is good, is subject to the selection of a lot of lithium ion battery manufacturer.
The production of large-scale lithium ion battery is different from technique that is small-sized, the lithium ion battery employing welding electrode ear be applied on mobile device.In order to ensure that high capacity lithium ion battery can have good charge-discharge performance, that is, abundant lug must be ensured to ensure path during its discharge and recharge.The method (being the utility model patent of CN202712329 U see Authorization Notice No.) adopting pole piece to carry lug in prior art more, respectively the electric current on both positive and negative polarity is drawn by the technique of multi pole ears or full lug, so just omitted numerous and diverse welding electrode ear operation, make electrical property better simultaneously, but above-mentioned method still has weak point, it is loaded down with trivial details that insulation glue-line wherein often applies processing, the dispersion also relative difficulty of insulating material, and easily cause insulating material to precipitate owing to not using for a long time, make the easy short circuit of lithium ion battery plus-negative plate.
[utility model content]
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of carry the pole piece of lug and use the lithium ion battery of this pole piece, it is intended to solve, and the pole piece structure carrying lug of the prior art is unreasonable, insulation effect is not good, easily cause the technical problem of lithium ion battery short circuit.
For achieving the above object, the utility model proposes a kind of pole piece carrying lug, comprise pole piece base material, described pole piece base material comprises pole piece active material district and stays white area, pole piece active material layer is coated with in described pole piece active material district, the edge of pole piece base material is located in described white area of staying, described pole piece base material also comprises PUR district, described pole piece active material district is positioned at the mid portion of pole piece base material, described PUR district is positioned at the outside in pole piece active material district, described white area of staying is positioned at the outside in PUR district, hot melt adhesive layer is coated with in described PUR district, described hot melt adhesive layer is equally distributed polypropylene or polyethylene.
As preferably, the described width in white area that stays is 6mm ~ 20mm, and the width in described PUR district is 2mm m ~ 10mm.
As preferably, the thickness of described pole piece base material is 20 μm ~ 30 μm.
As preferably, the thickness of described pole piece active material layer is 70 μm ~ 200 μm.
As preferably, the thickness of described hot melt adhesive layer is 5 μm ~ 100 μm.
In order to realize technical purpose of the present utility model better, the utility model also proposed a kind of lithium ion battery, comprise positive plate, negative plate and barrier film, described positive plate comprises lug and positive active material, described positive plate is the pole piece carrying lug according to claim 1, and described positive active material is pole piece active material layer, and described lug is for staying white area, the thickness of described pole piece base material is 30 μm, and the thickness of described positive active material is 70 μm.
The beneficial effects of the utility model: compared with prior art, a kind of lithium ion battery that the utility model provides, structure is simple, adopts the pole piece carrying lug, effectively prevent the operation of numerous and diverse welding electrode ear, make the performance of lithium ion battery splendid, be more suitable for jumbo lithium ion battery, simultaneously, using hot melt adhesive layer as insulating material, improve the insulation effect of pole piece, enhance the reliability of lithium ion battery, thus be beneficial to the combination property and the market competitiveness that improve lithium ion battery.
Feature of the present utility model and advantage will be described in detail by reference to the accompanying drawings by embodiment.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the pole piece carrying lug in the utility model embodiment;
Fig. 2 is the structural representation of lithium ion battery in the utility model embodiment.
[embodiment]
For making the purpose of this utility model, technical scheme and advantage clearly understand, below by accompanying drawing and embodiment, the utility model is further elaborated.But should be appreciated that, specific embodiment described herein, only in order to explain the utility model, is not limited to scope of the present utility model.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present utility model.
Consult Fig. 1, the utility model embodiment provides a kind of pole piece carrying lug, comprise pole piece base material 1, pole piece base material 1 comprises pole piece active material district 2 and stays white area 3, pole piece active material layer 21 is coated with in pole piece active material district 2, white area 3 is stayed to be located at the edge of pole piece base material 1, pole piece base material 1 also comprises PUR district 4, pole piece active material district 2 is positioned at the mid portion of pole piece base material 1, PUR district 4 is positioned at the outside in pole piece active material district 2, white area 3 is stayed to be positioned at the outside in PUR district 4, hot melt adhesive layer 41 is coated with in PUR district 4, hot melt adhesive layer 41 is equally distributed polypropylene or polyethylene.
Embodiment of the present utility model adopts hot melt adhesive layer 41 as insulating protective layer, greatly reduces the possibility causing both positive and negative polarity short circuit in pole piece battery core inside, makes lithium ion battery self discharge little, improve consistency and the reliability of lithium ion battery.
Wherein, hot melt adhesive layer 41 adopts the even place of thermosol point gum machine outside pole piece active material district 2.Compared with prior art, hot melt adhesive layer 41 character is comparatively stable, not easily precipitates, and the paint-on technique of hot melt adhesive layer 41 is comparatively ripe, and therefore the processing cost of pole piece is also comparatively cheap.
Particularly, stay the width in white area 3 to be 6mm ~ 20mm, the width in PUR district 4 is 2mm m ~ 10mm.
Further, in embodiment of the present utility model, the thickness of pole piece base material 1 is 20 μm ~ 30 μm, and the thickness of pole piece active material layer 21 is 70 μm ~ 200 μm, and the thickness of hot melt adhesive layer 41 is 5 μm ~ 100 μm.
Consult Fig. 2, embodiment of the present utility model also provides a kind of lithium ion battery, comprise positive plate 5, negative plate 6 and barrier film 7, positive plate 5 comprises lug 51 and positive active material, positive plate 5 is the pole piece that claim 1 carries lug 51, and positive active material is pole piece active material layer 21, and lug 51 is for staying white area 3, the thickness of pole piece base material 1 is 30 μm, and the thickness of positive active material is 70 μm.
In embodiment of the present utility model, positive plate 5 and negative plate 6 are oppositely overlapping mutually, are placed with barrier film 7 between the two, and only have positive plate 5 to be provided with hot melt adhesive layer 41.This kind of structure further avoid the situation of both positive and negative polarity short circuit, is applicable to Large Copacity, high-tension lithium ion battery.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace or improvement etc., all should be included within protection range of the present utility model.

Claims (6)

1. one kind carries the pole piece of lug, comprise pole piece base material (1), described pole piece base material (1) comprises pole piece active material district (2) and stays white area (3), pole piece active material layer (21) is coated with in described pole piece active material district (2), the edge of pole piece base material (1) is located in described white area (3) of staying, it is characterized in that: described pole piece base material (1) also comprises PUR district (4), described pole piece active material district (2) is positioned at the mid portion of pole piece base material (1), described PUR district (4) is positioned at the outside in pole piece active material district (2), described white area (3) of staying is positioned at the outside of PUR district (4), hot melt adhesive layer (41) is coated with in described PUR district (4), described hot melt adhesive layer (41) is equally distributed polypropylene or polyethylene.
2. a kind of pole piece carrying lug as claimed in claim 1, is characterized in that: the described width in white area (3) that stays is 6mm ~ 20mm, and the width in described PUR district (4) is 2mm m ~ 10mm.
3. a kind of pole piece carrying lug as claimed in claim 1, is characterized in that: the thickness of described pole piece base material (1) is 20 μm ~ 30 μm.
4. a kind of pole piece carrying lug as claimed in claim 3, is characterized in that: the thickness of described pole piece active material layer (21) is 70 μm ~ 200 μm.
5. a kind of pole piece carrying lug as described in claim 3 or 4, is characterized in that: the thickness of described hot melt adhesive layer (41) is 5 μm ~ 100 μm.
6. a lithium ion battery, comprise positive plate (5), negative plate (6) and barrier film (7), described positive plate (5) comprises lug (51) and positive active material, it is characterized in that: described positive plate (5) is the pole piece carrying lug (51) according to claim 1, described positive active material is pole piece active material layer (21), described lug (51) is for staying white area (3), the thickness of described pole piece base material (1) is 30 μm, and the thickness of described positive active material is 70 μm.
CN201420455111.7U 2014-08-12 2014-08-12 A kind ofly carry the pole piece of lug and use the lithium ion battery of this pole piece Expired - Lifetime CN204130623U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420455111.7U CN204130623U (en) 2014-08-12 2014-08-12 A kind ofly carry the pole piece of lug and use the lithium ion battery of this pole piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420455111.7U CN204130623U (en) 2014-08-12 2014-08-12 A kind ofly carry the pole piece of lug and use the lithium ion battery of this pole piece

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CN204130623U true CN204130623U (en) 2015-01-28

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106129327A (en) * 2016-08-10 2016-11-16 欣旺达电子股份有限公司 Anode slice of lithium ion battery and lithium ion battery
CN114335754A (en) * 2021-12-24 2022-04-12 珠海冠宇电池股份有限公司 Battery with a battery cell
CN114388809A (en) * 2022-01-17 2022-04-22 惠州锂威新能源科技有限公司 Laminated high-thermal-safety lithium ion battery
CN116014083A (en) * 2023-02-16 2023-04-25 江苏正力新能电池技术有限公司 Manufacturing process of lithium ion battery capable of preventing tab from being reversely inserted and lithium ion battery

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106129327A (en) * 2016-08-10 2016-11-16 欣旺达电子股份有限公司 Anode slice of lithium ion battery and lithium ion battery
CN114335754A (en) * 2021-12-24 2022-04-12 珠海冠宇电池股份有限公司 Battery with a battery cell
CN114388809A (en) * 2022-01-17 2022-04-22 惠州锂威新能源科技有限公司 Laminated high-thermal-safety lithium ion battery
CN114388809B (en) * 2022-01-17 2023-07-04 惠州锂威新能源科技有限公司 Laminated high-heat safety lithium ion battery
CN116014083A (en) * 2023-02-16 2023-04-25 江苏正力新能电池技术有限公司 Manufacturing process of lithium ion battery capable of preventing tab from being reversely inserted and lithium ion battery

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GR01 Patent grant
CX01 Expiry of patent term

Granted publication date: 20150128

CX01 Expiry of patent term