阅读说明：本技术 一种极片自动除水的锂离子电池 (A kind of lithium ion battery of pole piece automatic water-removing ) 是由 李义 李国敏 于 2018-05-27 设计创作，主要内容包括：目前锂离子电池在制造过程对环境要求比较严格,而高镍正极材料容易吸收空气中的水分,导致材料不可逆的副反应发生,从而严重影响了锂离子电池的性能。本发明公开一种极片自动除水的锂离子电池,在正极材料搅拌合浆时添加特殊的除水添加剂,在正极片制作的搅拌合浆到装配完成过程中,与环境中的水份接触时,正极片中的除水添加剂可以优先和接触的环境中的水反应,从而大大降低正极材料受空气中水侵蚀破坏的程度,从而提高电池的容量和循环寿命。(Lithium ion battery is stringenter to environmental requirement in manufacturing process at present, and nickelic positive electrode is easy to absorb the moisture in air, causes the irreversible side reaction of material to occur, to seriously affect the performance of lithium ion battery.The present invention discloses a kind of lithium ion battery of pole piece automatic water-removing, it is special except water additive to add when positive electrode stirs and closes slurry, slurry is closed into assembly complete process in the stirring of positive plate production, when being contacted with the moisture content in environment, in positive plate can water reaction in preferential and contact environment except water additive, to substantially reduce the degree that positive electrode is destroyed by water erosion in air, to improve the capacity and cycle life of battery.)

1. a kind of lithium ion battery of pole piece automatic water-removing, which is characterized in that the positive plate of the battery is by except water additive, just Pole active material, conductive agent, binder and collector are constituted.

2. a kind of lithium ion battery of pole piece automatic water-removing according to claim 1, which is characterized in that the water removal adds Add agent be DCC(dicyclohexylcarbodiimide), HMDS(hexamethyldisilazane), DIC(N, N'- diisopropylcarbodiimide), H7MDS(heptamethyldisilazane) one of or it is several.

3. a kind of lithium ion battery of pole piece automatic water-removing according to claim 1, which is characterized in that the system of the battery Preparation Method is, first by positive active material, conductive agent, binder, except water additive is in stirrer for mixing, then plus diluent Slurry is stirred into, on a current collector by slurry coating, drying back roller rolls into thin slice, then cuts into design shape and anode is made Piece；Using similar approach prepares negative electrode tab, then by positive plate, negative electrode tab and diaphragm is rolled or lamination is at core, weldering Connect tab post package at half-cell, then by half-cell put in an oven vacuum bakeout for a period of time, again fluid injection, shelve one section when Between after chemical conversion, a kind of lithium ion battery of pole piece automatic water-removing is obtained after last partial volume.

Technical field

The invention belongs to technical field of lithium ion, and in particular to a kind of lithium ion battery of the dynamic water removal of pole piece.

Background technique

Lithium ion battery is a kind of high-tech product, has in national economy and its is widely applied, small to mobile, notes This computer arrives greatly electric bicycle, electric bus etc. and all uses lithium ion battery.

One direction of lithium ion battery future development be exactly minimize, lightness, mobile phone become it is more and more thinner, call

Time is but increasingly longer, and electric bus, which is increasingly gentlier settled, the more to be run the more remote.

The essence of this behind is that the energy density of lithium ion battery improves, positive and negative pole material all use high gram volume and The material of high compacted density.Show in this respect it is especially special be tertiary cathode material material, from about 145mAh/g grams 111 types of capacity develop to 811 types of about 190mAh/g gram volume.

Accompanying problem is that the higher processing environment requirement to lithium ion battery of nickel content is higher in ternary material, Because nickelic ternary material is easy water suction, and occurs side reaction and generate sodium hydroxide and sodium carbonate, this is an irreversible reaction, is dried It is roasting also again to remove water, so as to cause performance of lithium ion battery reduction.

Summary of the invention

The present invention discloses a kind of lithium ion battery of pole piece automatic water-removing, and water removal is added when positive electrode stirs and closes slurry Additive should preferentially can react with water except water additive, and to protect positive plate, reduce positive active material by water destruct Degree.

Its technical solution is:

A kind of lithium ion battery of pole piece automatic water-removing, positive plate is by removing water additive, positive active material, conduction

Agent, binder and collector are constituted.

It is described except water additive be DCC(dicyclohexylcarbodiimide), HMDS(hexamethyldisilazane), DIC(N, N'- Diisopropylcarbodiimide), H7MDS(heptamethyldisilazane) one of or it is several.

Preparation method is, first by positive active material, conductive agent, binder, except water additive is in stirrer for mixing, Then plus diluent stirs into slurry, and on a current collector by slurry coating, drying back roller rolls into thin slice, then cuts into design shape Positive plate is made in shape；Using similar approach prepares negative electrode tab, then by positive plate, negative electrode tab and diaphragm is rolled or lamination At core, soldering polar ear post package at half-cell, then by half-cell put in an oven vacuum bakeout for a period of time, again fluid injection, It is melted into after shelving a period of time, a kind of lithium ion battery of pole piece automatic water-removing is obtained after last partial volume.

The beneficial effects of the present invention are close slurry into assembly complete process in the stirring of positive plate production, in environment Moisture content contact when, in positive plate except water additive can water reaction in preferential and contact environment, to substantially reduce Anode material for lithium-ion batteries is by the degree of water destruct；And before fluid injection in baking process or can be in coating baking process By the overwhelming majority except water additive and side reaction product remove, to ensure that the performance of battery is unaffected.

Specific embodiment

The case being set forth below is to supplementary explanation of the invention, rather than is limitation of the present invention.

A kind of lithium ion battery of pole piece automatic water-removing, positive plate is by removing water additive, positive active material, conduction

Agent, binder and collector are constituted.It is described except water additive be DCC(dicyclohexylcarbodiimide), HMDS(hexamethyl Disilazane), DIC(N, N'- diisopropylcarbodiimide), H7MDS(heptamethyldisilazane) one of or it is several.

The battery preparation method is, first by positive active material, conductive agent, binder, except water additive is in blender Middle mixing, then plus diluent stirs into slurry, and on a current collector by slurry coating, drying back roller rolls into thin slice, then cuts Positive plate is made at design shape；Using similar approach prepares negative electrode tab, then that positive plate, negative electrode tab and diaphragm is rolled Or lamination is at core, soldering polar ear post package at half-cell, then by half-cell put in an oven vacuum bakeout for a period of time, Again fluid injection, shelve a period of time after be melted into, obtain a kind of lithium ion battery of pole piece automatic water-removing after last partial volume.