CN206849932U

CN206849932U - A kind of lithium ion cell polar ear

Info

Publication number: CN206849932U
Application number: CN201720814106.4U
Authority: CN
Inventors: 沈晓宇; 吴红星; 张忠杰; 周建江; 吕少青; 陈翠亮; 渡边充广
Original assignee: HUZHOU TONY ELECTRONIC CO Ltd
Current assignee: HUZHOU TONY ELECTRONIC CO Ltd
Priority date: 2017-07-06
Filing date: 2017-07-06
Publication date: 2018-01-05
Anticipated expiration: 2027-07-06

Abstract

It the utility model is related to a kind of lithium ion cell polar ear, including lug metal tape, heat pressure adhesive has one group of tab respectively on the upper and lower surface of the lug metal tape, and two groups of tabs are arranged symmetrically in the both sides of lug metal tape, the both ends of two groups of tabs are overflowed from the ora terminalis of the width of lug metal tape to the outside of width respectively, and the left end of two groups of tabs, the mutual welding of the right-hand member of two groups of tabs are in integration；The lug metal tape is the nickel-clad copper band or aluminium strip that thickness is 100 μm~300 μm；The tab includes five-layer structure, is followed successively by the film layer a that can be bonded with metal covering, the first insulating barrier, intermediate buffer layer, the second insulating barrier and the film layer b that can be bonded with aluminum plastic film from top to bottom, the thickness of the tab is 100~150 μm.The utility model tab is bonded on lug metal tape, plays a part of sealing, insulation, the inside applied to lithium ion power soft-package battery.

Description

A kind of lithium ion cell polar ear

Technical field：

Field of lithium ion battery is the utility model is related to, more particularly to a kind of lithium ion cell polar ear.

Background technology：

In nonaqueous electrolyte lithium battery or capacitor, provided with for exporting electric lug to outside.In the battery, lug One end be connected with cell device, clamped by relative aluminum plastic film, the other end is exported to the outside of aluminum plastic film.Existing lug Structure lug is the lug that adhering polar ear glue forms on two sides of the center section of the length direction of conductor in conductor, conductor by The material that nickel plating forms on copper is formed.Therefore conductor one side need and tab hot sealing bonding, conductor it is another Side needs and aluminum plastic film hot sealing bonding, and to be also required to sealing viscous for the outward flange of adhering polar ear glue on the two sides of conductor Close, because lug products application is in the inside of lithium ion power soft-package battery, play sealing, the effect of insulation.And battery is interior Portion is marked with electrolyte.Electrolyte has corrosivity.Battery can generate heat during discharge and recharge simultaneously.Will based on these applications Ask, it is necessary to be improved to conductor and tab, guarantee lug has high leakproofness and highly corrosive in use.

Utility model content：

The purpose of this utility model is in view of the deficiencies of the prior art, there is provided a kind of lithium ion cell polar ear, is solved The defects of lug sealing is poor in the prior art, corrosion-resistant.

Technology solution of the present utility model is as follows：

A kind of lithium ion cell polar ear, including lug metal tape, the upper and lower surface of the lug metal tape are distinguished hot pressing and glued Conjunction has one group of tab, and two groups of tabs are arranged symmetrically in the both sides of lug metal tape, the both ends difference of two groups of tabs Overflowed from the ora terminalis of the width of lug metal tape to the outside of width, and the left end or two groups of lugs of two groups of tabs The mutual welding of right-hand member of glue is in integration；The lug metal tape is the nickel-clad copper band or aluminium strip that thickness is 100 μm~300 μm； The tab includes five-layer structure, be followed successively by from top to bottom can with metal covering bond film layer a, the first insulating barrier, in Between cushion, the second insulating barrier and the film layer b that can be bonded with aluminum plastic film, the thickness of the tab is 100~150 μm.

Preferably, the thickness of the nickel coating of the nickel-clad copper band is 1~3 μm.

Preferably, surface passivating treatment is done on the nickel coating forms passivating film, the thickness of the passivating film is 10~20nm.

Preferably, the thickness of first insulating barrier and the second insulating barrier is identical, fusing point is identical；The film layer a and Film layer b thickness is identical, and fusing point is identical；The fusing point of the intermediate buffer layer is more than film layer a or film layer b fusing point, in Between the fusing point of cushion be less than the fusing point of the first insulating barrier or the second insulating barrier；It is exhausted that the thickness of the intermediate buffer layer is less than first The thickness of the thickness of edge layer or the second insulating barrier, the first insulating barrier or the second insulating barrier is less than film layer a or film layer b thickness Degree.

Preferably, the film layer a or film layer b are thickness is 25 μm, the MODIFIED PP material that fusing point is 135 DEG C.

Preferably, first insulating barrier or the second insulating barrier are thickness is 20 μm, the MODIFIED PP material that fusing point is 155 DEG C Material.

Preferably, the intermediate buffer layer is thickness is 10 μm, the MODIFIED PP material that fusing point is 145 DEG C.

The beneficial effects of the utility model are：

Lug provided by the utility model, under long-term electrolyte immersion corrosion, lamination does not occur, so as to keep away Exempt from the generation of the serious phenomenons such as sealing cracking, electrolyte leakage, improve cell safety and service life.

The utility model tab includes five-layer structure, be followed successively by from top to bottom can with metal covering bond film layer a, First insulating barrier, intermediate buffer layer, the second insulating barrier and the film layer b that can be bonded with aluminum plastic film, five-layer structure is using different The MODIFIED PP material of fusing point, is once completed by multi-layer co-extruded mode, and the PP layers of different melting points adapt to lug product hot melt and added The mode of work, make the film layer a and metal tape hot melting cohesion of low melting point layer, and high-melting-point insulating barrier does not melt, it is ensured that Insulating barrier, refractory layer do not change.Ensure that product still possesses insulation function, resistance to hot function after finally using on battery.

Intermediate buffer layer of the present utility model is one layer of low melting point layer, using when lug is heated and processed, is occurred in advance molten Melt softening, flow under the effect of the pressure, to reach the air between exclusion colloid and metal covering, avoid lug processing Bubble between tab and metal covering be present after complete, beneficial to the long-term work life-span of battery.

The utility model uses special MODIFIED PP material, after long period of soaking electrolyte, chemical breakdown does not occur, does not occur Dilatancy.

The utility model uses multi-layer co-extruded technology, and the PP engagements between different layers are good, and lamination will not occur.

Brief description of the drawings：

The utility model is described further below in conjunction with the accompanying drawings：

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the sectional view of A-A in Fig. 1；

Fig. 3 is the structural representation of tab of the present utility model；

Symbol description in figure：1-lug metal tape；2nd, 3-tab；4-nickel coating；5-passivating film；6-film layer a；7-the first insulating barrier；8-intermediate buffer layer；9-the second insulating barrier；10-film layer b.

Embodiment：

Embodiment, see accompanying drawing 1~3, a kind of lithium ion cell polar ear, including lug metal tape 1, the lug metal tape Heat pressure adhesive has one group of tab 2,3 respectively on upper and lower surface, and two groups of tabs are arranged symmetrically in the both sides of lug metal tape, The both ends of two groups of tabs are overflowed from the ora terminalis of the width of lug metal tape to the outside of width respectively, and two groups The mutual welding of the right-hand member of the left end of tab or two groups of tabs is in integration；The lug metal tape is that thickness is 150 μm Nickel-clad copper band or aluminium strip；The tab includes five-layer structure, is followed successively by the film layer that can be bonded with metal covering from top to bottom A6, the first insulating barrier 7, intermediate buffer layer 8, the second insulating barrier 9 and the film layer b10 that can be bonded with aluminum plastic film, the lug The thickness of glue is 100 μm.

The thickness of the nickel coating 4 of the nickel-clad copper band is 1 μm.

Surface passivating treatment is done on the nickel coating and forms passivating film 5, the thickness of the passivating film is 10nm.

The thickness of first insulating barrier and the second insulating barrier is identical, and fusing point is identical；The film layer a's and film layer b Thickness is identical, and fusing point is identical；The fusing point of the intermediate buffer layer is more than film layer a or film layer b fusing point, intermediate buffer layer Fusing point is less than the fusing point of the first insulating barrier or the second insulating barrier；The thickness of the intermediate buffer layer is less than the first insulating barrier or second The thickness of the thickness of insulating barrier, the first insulating barrier or the second insulating barrier is less than film layer a or film layer b thickness.

The film layer a or film layer b are the MODIFIED PP materials that thickness is 25 μm, fusing point is 135 DEG C.

First insulating barrier or the second insulating barrier are the MODIFIED PP materials that thickness is 20 μm, fusing point is 155 DEG C.

The intermediate buffer layer is the MODIFIED PP material that thickness is 10 μm, fusing point is 145 DEG C.

Above-described embodiment is the specific descriptions carried out to the utility model, and simply the utility model is carried out furtherly It is bright, it is impossible to be interpreted as the restriction to scope of protection of the utility model, those skilled in the art is according in above-mentioned utility model Appearance is made some nonessential modifications and adaptations and each fallen within the scope of protection of the utility model.

Claims

1. a kind of lithium ion cell polar ear, including lug metal tape, it is characterised in that：The upper and lower surface of the lug metal tape Heat pressure adhesive has one group of tab respectively, and two groups of tabs are arranged symmetrically in the both sides of lug metal tape, two groups of tabs Both ends are overflowed from the ora terminalis of the width of lug metal tape to the outside of width respectively, and a left side for two groups of tabs End, the mutual welding of the right-hand member of two groups of tabs are in integration；The lug metal tape is the nickel plating that thickness is 100 μm~300 μm Copper strips or aluminium strip；The tab includes five-layer structure, is followed successively by the film layer a that can be bonded with metal covering, the from top to bottom One insulating barrier, intermediate buffer layer, the second insulating barrier and the film layer b that can be bonded with aluminum plastic film, the thickness of the tab are 100~150 μm.

A kind of 2. lithium ion cell polar ear according to claim 1, it is characterised in that：The nickel coating of the nickel-clad copper band Thickness is 1~3 μm.

A kind of 3. lithium ion cell polar ear according to claim 2, it is characterised in that：Surface passivation is done on the nickel coating Processing forms passivating film, and the thickness of the passivating film is 10~20nm.

A kind of 4. lithium ion cell polar ear according to claim 1, it is characterised in that：First insulating barrier and second exhausted The thickness of edge layer is identical, and fusing point is identical；The film layer a is identical with film layer b thickness, and fusing point is identical；The intermediate buffering The fusing point of layer is more than film layer a or film layer b fusing point, and the fusing point of intermediate buffer layer is less than the first insulating barrier or the second insulating barrier Fusing point；The thickness of the intermediate buffer layer is less than the thickness of the first insulating barrier or the second insulating barrier, the first insulating barrier or second The thickness of insulating barrier is less than film layer a or film layer b thickness.

A kind of 5. lithium ion cell polar ear according to claim 1, it is characterised in that：The film layer a or film layer b are The MODIFIED PP material that thickness is 25 μm, fusing point is 135 DEG C.

A kind of 6. lithium ion cell polar ear according to claim 1, it is characterised in that：First insulating barrier is second exhausted Edge layer is the MODIFIED PP material that thickness is 20 μm, fusing point is 155 DEG C.

A kind of 7. lithium ion cell polar ear according to claim 1, it is characterised in that：The intermediate buffer layer is that thickness is 10 μm, the MODIFIED PP material that fusing point is 145 DEG C.