阅读说明：本技术 一种锂离子电池正极合浆工艺 (A kind of lithium ion cell positive slurry-stirring process ) 是由 张近钢 白科 游杰 陈远林 于 2019-08-30 设计创作，主要内容包括：本发明公开了一种锂离子电池正极合浆工艺,包括以下步骤：S1、将PVDF和NMP搅拌混合20～40mi；S2、加入导电剂,搅拌混合10～20min；S3、加入正极主粉磷酸铁锂,搅拌混合20～30min；S4、再次加入NMP,搅拌混合30～50min；S5、进行高速分散20～60min；S6、进行真空脱泡搅拌40～60min,即得到锂离子电池正极浆料。本发明提供的一种锂离子电池正极合浆工艺,采用搅拌、高速分散、真空脱泡搅拌的工艺步骤,工艺操作简单,适用于锂离子电池的实际生产,提高了生产效率,降低了生产成本,获得的正极浆料的粘度和固含量稳定性良好,分散效果优异,具有较好的电化学性能。(The invention discloses a kind of lithium ion cell positive slurry-stirring process, comprising the following steps: PVDF and NMP S1, are stirred 20~40mi；S2, conductive agent is added, is stirred 10~20min；S3, the main powder LiFePO4 of anode is added, is stirred 20~30min；S4, NMP is added again, is stirred 30~50min；S5,20~60min of high speed dispersion is carried out；S6, vacuum defoamation 40~60min of stirring is carried out to get lithium ion battery anode glue size is arrived.A kind of lithium ion cell positive slurry-stirring process provided by the invention, using stirring, high speed dispersion, the processing step of vacuum defoamation stirring, technological operation is simple, actual production suitable for lithium ion battery, production efficiency is improved, production cost is reduced, the viscosity and solid content of the anode sizing agent of acquisition have good stability, dispersion effect is excellent, has preferable chemical property.)

1. a kind of lithium ion cell positive slurry-stirring process, which comprises the following steps:

S1, PVDF and NMP is added in gluing tank, is stirred 20~40min, obtains glue A；

S2, glue A is imported in agitator tank by pipeline from gluing tank, then into glue A conductive agent is added, it is stirred 10~ 20min obtains mixture B；

S3, the main powder LiFePO4 of anode is added into mixture B, is stirred 20~30min, obtains mixture C；

S4, NMP is added again into mixture C, is stirred 30~50min, obtain slurry D；

S5, by slurry D by pipeline from agitator tank import high speed disperser in, then to slurry D carry out high speed dispersion 20~ 60min obtains slurry E；

S6, slurry E is added in vacuum defoamation agitator tank, vacuum defoamation is carried out to slurry E and stirs 40~60min, obtains slurry F, slurry F are prepared lithium ion battery anode glue size.

2. a kind of lithium ion cell positive slurry-stirring process according to claim 1, it is characterised in that: be added in the S1 The amount of NMP accounts for NMP total amount is added in S1 and S4 twice 30~35%.

3. a kind of lithium ion cell positive slurry-stirring process according to claim 1, it is characterised in that: by PVDF in the S1 It is formed before glue A after being mixed with NMP, the rotation frequency of used gluing tank is 1200~1400rpm, revolve frequency It is -90~-100kPa for 10~20rpm, vacuum degree.

4. a kind of lithium ion cell positive slurry-stirring process according to claim 1, it is characterised in that: conductive agent in the S2 It is formed before mixture B after being added, the rotation frequency of used agitator tank is 1200~1400rpm, revolution frequency is 10 ~20rpm.

5. a kind of lithium ion cell positive slurry-stirring process according to claim 1, it is characterised in that: ferric phosphate in the S3 Lithium be added after formed mixture C before, the rotation frequency of used agitator tank be adjusted to 0rpm, revolution frequency be 10~ 20rpm。

6. a kind of lithium ion cell positive slurry-stirring process according to claim 1, it is characterised in that: NMP adds in the S4 Formed before slurry D after entering, the rotation frequency of used agitator tank is 1400~1600rpm, revolution frequency be 10~ 30rpm。

7. a kind of lithium ion cell positive slurry-stirring process according to claim 1, it is characterised in that: to slurry in the S5 D carries out high speed dispersion and is formed before slurry E, and the dispersing shear speed of used high speed disperser is 40~50m/min.

8. a kind of lithium ion cell positive slurry-stirring process according to claim 1, it is characterised in that: to slurry in the S6 Before E progress vacuum defoamation stirs to get lithium ion battery anode glue size, when 7/10 before used vacuum defoamation agitator tank Between rotation frequency be 1400~1600rpm, revolution frequency be 10~30rpm/min, vacuum degree be -90~-100kPa, rear 3/ The rotation frequency of 10 times is adjusted to 150~250rpm, revolution frequency is 10~30rpm, vacuum degree is -90~-100kPa.

9. a kind of lithium ion cell positive slurry-stirring process according to claim 1, it is characterised in that: in vacuum in the S6 It also needs to detect slurry viscosity, fineness and solid content after the completion of deaeration stirring, adjusts slurry viscosity value, obtaining lithium ion battery just Pole slurry.

Technical field

The present invention relates to lithium ion battery technology field, specially a kind of lithium ion cell positive slurry-stirring process.

Background technique

Summary of the invention

The purpose of the present invention is to provide a kind of lithium ion cell positive slurry-stirring process, and technological operation is simple, are suitable for lithium The actual production of ion battery, improves production efficiency, reduces production cost, the viscosity and solid content of the anode sizing agent of acquisition It has good stability, dispersion effect is excellent, has preferable chemical property, to solve the problems mentioned in the above background technology.

To achieve the above object, the invention provides the following technical scheme:

A kind of lithium ion cell positive slurry-stirring process, comprising the following steps:

S1, PVDF and NMP is added in gluing tank, is stirred 20~40min, obtains glue A；

S2, glue A is imported in agitator tank by pipeline from gluing tank, then conductive agent is added into glue A, be stirred 10~20min obtains mixture B；

S3, the main powder LiFePO4 of anode is added into mixture B, is stirred 20~30min, obtains mixture C；

S4, NMP is added again into mixture C, is stirred 30~50min, obtain slurry D；

S5, by slurry D by pipeline from agitator tank import high speed disperser in, then to slurry D carry out high speed dispersion 20~ 60min obtains slurry E；

S6, slurry E is added in vacuum defoamation agitator tank, vacuum defoamation is carried out to slurry E and stirs 40~60min, is obtained Slurry F, slurry F are prepared lithium ion battery anode glue size.

Preferably, the amount for NMP being added in the S1 accounts for NMP total amount is added in S1 and S4 twice 30~35%.

Preferably, after PVDF and NMP being mixed in the S1 formed glue A before, used agitator tank from Turn frequency be 1200~1400rpm, revolution frequency be 10~20rpm, vacuum degree be -90~-100kPa.

Preferably, it is formed before mixture B after conductive agent is added in the S2, the rotation frequency of used agitator tank It is 10~20rpm for 1200~1400rpm, revolution frequency.

Preferably, it is formed before mixture C after LiFePO4 is added in the S3, the rotation frequency of used agitator tank Rate is adjusted to 0rpm, revolution frequency is 10~20rpm.

Preferably, it is formed before slurry D after NMP is added in the S4, the rotation frequency of used agitator tank is 1400~1600rpm, revolution frequency are 10~30rpm.

Preferably, before carrying out high speed dispersion formation slurry E to slurry D in the S5, used high speed disperser Dispersing shear speed is 40~50m/min.

Preferably, it before stirring to get lithium ion battery anode glue size to slurry E progress vacuum defoamation in the S6, is adopted The rotation frequency of 7/10 time is 1400~1600rpm before vacuum defoamation agitator tank, revolution frequency is 10~30rpm/ Min, vacuum degree be -90~-100kPa, the rotation frequency of rear 3/10 time be adjusted to 150~250rpm, revolution frequency be 10~ 30rpm, vacuum degree are -90~-100kPa.

Preferably, it also needs to detect slurry viscosity, fineness and solid content after the completion of vacuum defoamation is stirred in the S6, adjusts Whole slurry viscosity value, obtains lithium ion battery anode glue size.

Compared with prior art, the beneficial effects of the present invention are: a kind of lithium ion cell positive provided by the invention closes slurry Technique, using stirring, high speed dispersion, the processing step of vacuum defoamation stirring, technological operation is simple, suitable for lithium ion battery Actual production improves production efficiency, reduces production cost, and the viscosity and solid content stability of the anode sizing agent of acquisition are good Good, dispersion effect is excellent, has preferable chemical property.

Detailed description of the invention

Fig. 1 is the flow diagram of lithium ion cell positive slurry-stirring process of the invention；

Fig. 2 is the viscosity change test curve of the anode sizing agent obtained in specific embodiments of the present invention 2；

Fig. 3 is that the solid content of the anode sizing agent obtained in specific embodiments of the present invention 2 changes test curve.

Specific embodiment

In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing and specific implementation Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair It is bright, it is not intended to limit the present invention.