Rapid testing technology for internal deformation field of lithium ion battery structure

• Main Authors: CHEN HAOSEN, SONG WEILI, XI LI, FANG DAINING, WANG PANDING
• Format: Patent
• Language: Chinese; English
• Published: 14.06.2019
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

The invention discloses a rapid testing technology for an internal deformation field of a lithium ion battery structure. According to the rapid testing technology for the internal deformation field ofthe lithium ion battery structure, firstly, an electrode sheet is obtained by coating a sizing agent on a positive and negative anode current collector; then, micron size internal marking points areadded to the surface of the electrode sheet after first coating is carried out; second coating of the sizing agent is carried out on the two surfaces of the electrode sheet, and then the prepared electrode sheet with the internal marking points is made into a lithium ion battery; then, by adjusting parameters of a CT imaging system, the exposure time of single projection is shortened as far as possible under the better voxel characteristic contrast of the internal marking points, and fast imaging is achieved; and combining a digital volume correlation internal deformation measurement method, the internal three-dimensio