CN202917600U

CN202917600U - Aluminum-plastic packed high-power lithium ion battery

Info

Publication number: CN202917600U
Application number: CN201220623209XU
Authority: CN
Inventors: 刘阳; 褚百清
Original assignee: QINHUANGDAO XINCHI PHOTOELECTRIC TECHNOLOGY Co Ltd
Current assignee: QINHUANGDAO XINCHI PHOTOELECTRIC TECHNOLOGY Co Ltd
Priority date: 2012-11-13
Filing date: 2012-11-13
Publication date: 2013-05-01
Anticipated expiration: 2022-11-13

Abstract

The utility model discloses an aluminum-plastic packed high-power lithium ion battery. The aluminum-plastic packed high-power lithium ion battery comprises an internal structure and a casing, wherein the internal structure consists of a positive pole group, a negative pole group, a diaphragm and PP (Propene Polymer) protection plates; the casing consists of a housing, a positive tab and a negative tab; the positive pole group and the negative pole group are stacked in a laminated cross manner and separated by the Z-shaped diaphragm; the PP protection plates are pasted on the upper surfaces and the lower surfaces of the pole groups; current collectors are arranged on the pole groups and connected with the tabs; the positive pole group adopts a ternary Ni-Co-Mn system; the negative pole group adopts an artificial graphite system; the two systems work together to achieve the characteristics of higher electrochemical window, high-temperature stability, easiness in lithium ion deintercalation/intercalation, and the like; and as the housing is an aluminum-plastic membrane formed by heat sealing of a copper membrane, the roles of firmness in packaging, water resistance, electrolyte corrosion resistance and the like can be played. The aluminum-plastic packed high-power lithium ion battery has the advantages that the structure is reasonable, the process is simple and the electrochemical system is reasonably matched, has instant high-power charge-discharge capabilities, and can satisfy the requirement on a power battery of a hybrid electric vehicle.

Description

A kind of aluminum-plastic packaged lithium ion high-power battery

Technical field

The utility model relates to a kind of aluminum-plastic packaged lithium ion high-power battery, is a kind of transient high power charging and discharging capabilities that possesses specifically, can be used in the lithium-ion-power cell of hybrid vehicle, belongs to the basic electrical component field.

Background technology

At present at new energy field, lithium-ion-power cell is used widely, especially in the new-energy automobile field, electrokinetic cell is the bottleneck that hinders industry development, country encourages the new-energy automobile industry, especially hybrid vehicle, its transient high power charging and discharging capabilities of using electrokinetic cell has proposed very high requirement.The utility model content

For the development prospect that exists in the background technology, the utility model provides a kind of aluminum-plastic packaged lithium ion high-power battery, and this energy content of battery density is high, possesses high discharge capability of moment.

In order to achieve the above object, the utility model is realized by following technological means:

A kind of aluminum-plastic packaged lithium ion high-power battery, comprise internal structure and shell, described internal structure comprises utmost point group, barrier film and PP screening glass, wherein utmost point group is comprised of anodal utmost point group and negative pole utmost point group, anodal utmost point group is comprised of anode pole piece, negative pole utmost point group is comprised of cathode pole piece, anode pole piece is the stacked formation utmost point group that is stacked together of intersecting with cathode pole piece, described barrier film is " Z " shape, anodal utmost point group and negative pole utmost point component are opened, play the effect of insulation, paste the PP screening glass in the utmost point group upper and lower surface of folding; Described shell comprises positive pole ear and the negative lug that housing and housing both sides lean out, and positive pole ear inwardly is connected with the collector that arranges on the anodal utmost point group, and negative lug is inside to be connected with the collector that arranges on the negative pole utmost point group.

Further, described anode pole piece adopts nickel ternary cobalt manganese system, and cathode pole piece adopts the Delanium system, and two kinds of system collocation have higher electrochemical window, and have high-temperature stable together, and lithium ion takes off the characteristics such as embedding is easy.

Further, the encapsulation of described housing employing aluminum plastic film hot melt, this aluminum plastic film has three-decker, is respectively PP layer, aluminium lamination, nylon layer from the inside to the outside, uses the copper film heat-sealing to form by heat sealing machine, the functions such as encapsulation is firm, waterproof, electrolyte resistance corrosion that it has.

The utility model mainly has following good effect and technical characterictic:

A kind of aluminum-plastic packaged lithium ion high-power battery of the utility model, rational in infrastructure, technique is simple, the electrochemical system collocation rationally has the transient high power charging and discharging capabilities, satisfies hybrid vehicle to the requirement of electrokinetic cell.

Description of drawings

Fig. 1 is internal structure schematic diagram of the present utility model;

Fig. 2 is shell schematic diagram of the present utility model;

Arabic numerals among the figure are expressed as follows:

1. anodal utmost point group, 2.PP screening glass, 3. barrier film, 4. negative pole utmost point group, 5. positive pole ear, 6. housing, 7. negative lug.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail:

Such as Fig. 1 and Fig. 2; a kind of aluminum-plastic packaged lithium ion high-power battery; design capacity is 9Ah; nominal voltage is 3.6V; comprise internal structure and shell; described internal structure comprises utmost point group; barrier film 3 and PP screening glass 2; wherein utmost point group is comprised of anodal utmost point group 1 and negative pole utmost point group 4; anodal utmost point group 1 is comprised of anode pole piece; negative pole utmost point group 4 is comprised of cathode pole piece; anode pole piece is the stacked formation utmost point group that is stacked together of intersecting with cathode pole piece; described barrier film 3 is " Z " shape, and anodal utmost point group 1 and negative pole utmost point group 4 are separated, and it is the PP/PE/PP three-decker material of 40um that barrier film 3 adopts thickness; play the effect of insulation, pasting thickness in the utmost point group upper and lower surface of folding is the PP screening glass 2 of 0.1mm.

Such as Fig. 1 and Fig. 2, described shell comprises positive pole ear 5 and the negative lug 7 that housing 6 and housing both sides lean out, and positive pole ear 5 inwardly is connected with the collector that arranges on the anodal utmost point group 1, and negative lug 7 is inside to be connected with the collector of setting on the negative pole utmost point group 4.Described shell overall dimension be thickness be 8.6mm, width be 115mm, highly for 190mm, be that the aluminum plastic film of 150um forms with the encapsulation of the blob of viscose hot melt on positive pole ear and the negative lug by thickness, lug is with housing 6 insulation simultaneously.

Further, described anode pole piece adopts nickel ternary cobalt manganese system, conductive agent is acetylene black and carbon black, binding agent is PVDF, be 92: 3: 2 by weight: 3 usefulness solvent NMP mix it, be coated in thickness and be on the positive and negative of aluminium foil of 25um, baking is dry and be rolled into the pole piece that thickness is 75um, and the multilayer pole piece forms anodal utmost point group; Cathode pole piece adopts the Delanium system, conductive agent is acetylene black, binding agent is SBR, be that 94: 2: 4 usefulness solvent deionized water mix it according to weight ratio, being coated in thickness is on the Copper Foil positive and negative of 15um, baking is dry and be rolled into the pole piece that thickness is 83um, and the multilayer pole piece forms negative pole utmost point group.Two kinds of system collocation have higher electrochemical window, and have high-temperature stable together, and lithium ion takes off the characteristics such as embedding is easy.

Claims

1. aluminum-plastic packaged lithium ion high-power battery, comprise internal structure and shell, it is characterized in that: described internal structure comprises utmost point group, barrier film and PP screening glass, wherein utmost point group is comprised of anodal utmost point group and negative pole utmost point group, anodal utmost point group is comprised of anode pole piece, negative pole utmost point group is comprised of cathode pole piece, anode pole piece is the stacked formation utmost point group that is stacked together of intersecting with cathode pole piece, described barrier film is " Z " shape, anodal utmost point group and negative pole utmost point component are opened, pasted the PP screening glass in the utmost point group upper and lower surface of folding; Described shell comprises positive pole ear and the negative lug that housing and housing both sides lean out, and positive pole ear inwardly is connected with the collector that arranges on the anodal utmost point group, and negative lug is inside to be connected with the collector that arranges on the negative pole utmost point group.

2. a kind of aluminum-plastic packaged lithium ion high-power battery according to claim 1 is characterized in that: described anode pole piece employing nickel ternary cobalt manganese system, cathode pole piece employing Delanium system.

3. a kind of aluminum-plastic packaged lithium ion high-power battery according to claim 1, it is characterized in that: described housing adopts the encapsulation of aluminum plastic film hot melt, this aluminum plastic film has three-decker, is respectively PP layer, aluminium lamination, nylon layer from the inside to the outside, uses the copper film heat-sealing to form.