Battery pole sheet rolling method and its multi-stage roll machine
A battery pole piece and roll machine technology, which is applied in electrode manufacturing, rolling force/roll gap control, metal rolling, etc., can solve the problem of inability to control the spring force of the disc spring, difficulty in accurately controlling the compression ratio, and pressure changes. Uncontrollable problems, to achieve the effect of improving versatility and efficiency, improving quality consistency, and improving overall performance
Active Publication Date: 2016-01-27
SHENZHEN XINYUREN TECH
View PDF7 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This kind of rolling mill can be used between rolling ordinary pole pieces and other single-sided and double-sided pole pieces. subject to certain restrictions; in addition, if the disc spring is set between the upper and lower roller bearing seats, it is impossible to control the elastic force of the disc spring. With the increase of the compression times of the disc spring, the creep of the disc spring will cause the elastic coefficient to change, resulting in The pressure acting on the pole piece changes, and the pressure change is uncontrollable, so its compression ratio is difficult to control accurately
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] The invention provides a method for rolling battery pole pieces, comprising the following steps,
[0030] (1) The step of compacting the battery pole piece, this step is realized by at least one pre-pressing device, the distance between the rolling gaps of the pre-pressing device is elastic during the rolling process of the pole piece, and the pressure of the rolling gap is It is realized by an elastic hydraulic pneumatic device acting on one of the two rollers forming the nip; (here, the pre-compression of the battery pole piece is realized by the pre-compression roller controlled by the elastic hydraulic device. The stage can use one or more stages of pre-compression devices with basically constant pressure, and realize 80%-95% of the compression ratio of the battery pole pieces in the pre-compression stage. For example, it is assumed that the compression ratio of the battery pole pieces is designed to be 30%-35%. The so-called compression ratio of the battery pole pi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| density | aaaaa | aaaaa |
Login to View More
Abstract
A battery pole piece multistage roller machine comprises a thicknessing device. The thicknessing device comprises a first roller and a second roller. A gap adjusting mechanism is arranged between bearing blocks at the two ends of the first roller, and a gap adjusting mechanism is arranged between bearing blocks at the two ends of the second roller. Hydraulic devices act on the two ends of the first roller or the two ends of the second roller to make the roll gap between the two rollers maintained basically constant. The battery pole piece multistage roller machine further comprises at least one prepressing device. Each prepressing device comprises a first prepressing roller, a second prepressing roller and a pair of prepressing roller elastic hydraulic devices, a prepressing roller gap is formed between the first prepressing roller and the second prepressing roller, and the prepressing roller elastic hydraulic devices respectively act on the two ends of the first prepressing roller or the two ends of the second prepressing roller to make the pressure of the first prepressing roller or the pressure of the second prepressing roller maintained basically constant. The battery pole piece multistage roller machine is wide in application range and can be used for a single-side pole piece or a two-side pole piece or an ordinary pole piece without any structural adjustment, and therefore universality of the roller machine is improved.
Description
technical field [0001] The invention relates to a battery pole piece rolling method for battery pole pieces, especially a lithium ion battery pole piece, and a multistage rolling machine thereof. Background technique [0002] Lithium-ion batteries are composed of lithium-ion cells, electrolyte, protection circuit (PCM) and casing. The battery cell is composed of positive electrode, negative electrode and separator. The components of the positive electrode are positive electrode materials (such as lithium iron phosphate) + conductive agent + binder (PVDF) + current collector (aluminum foil), and the components of the negative electrode are graphite + conductive agent + thickener (CMC) + binder (SBR) + current collector (copper foil). The positive and negative electrodes are generally called battery pole pieces in the industry. In order to improve the density and thickness consistency of the surface material of the battery pole piece, the positive and negative pole pieces mu...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/62B21B1/40B21B38/04B21B37/28H01M4/04
CPCY02E60/10
Inventor 杨志明周华民
Owner SHENZHEN XINYUREN TECH