Laminating machine and diaphragm laminating method

Abstract

The invention discloses a laminating machine. The laminating machine comprises a bracket, an unwinding roller, a heating device, a laminating table and a gripper. The unwinding roller is arranged on the support in a rolling mode and used for supporting a diaphragm roll and unwinding a diaphragm. The heating device is arranged on the downstream of the unwinding roller, located on the advancing path of the diaphragm and used for heating the diaphragm to soften glue on the two faces of the diaphragm. The laminating table is arranged on the downstream of the heating device and is arranged to receive the diaphragms heated by the heating device. The gripper is arranged to sequentially grab the positive pole piece and the negative pole piece, sequentially place the positive pole piece and the negative pole piece on the two surfaces of the diaphragm, and sequentially stack the positive pole piece and the negative pole piece on the laminating table. According to the laminating machine, the heating device is additionally arranged, the heating device can heat the diaphragm, the heating of the two surfaces of the diaphragm is more uniform, and the colloid on the two surfaces is also more uniform in softening, so that the laminated diaphragm is also relatively firm in bonding with a positive plate or a negative plate, and the problem of errors of a stacked pole group is solved.

Description

technical field [0001] The invention relates to the field of battery manufacturing, in particular to a stacking machine and a diaphragm stacking method. Background technique [0002] At present, in the production process of lithium batteries, the positive electrode sheet and the negative electrode sheet are stacked and formed by interlacing the positive electrode sheet and the negative electrode sheet by using the wound separator. The separator is placed on the unwinding roller of the stacking machine, and the unwinding roller is continuously unwound, and the separator is continuously output to the stacking table. , the gripper of the stacking machine grabs the two sides of the separator where the positive electrode sheet and the negative electrode sheet are spaced apart, and stacks them on the stacking table. The positive and negative electrodes are stacked and then heated by hot pressing at 90°C to soften the glue on both sides of the diaphragm. The heating time is 90 seco...

AI Technical Summary

Problems solved by technology

The positive and negative electrodes are stacked and then heated by hot pressing at 90°C to soften the glue on both sides of the diaphragm. The heating time is 90 seconds. The formed electrode group is relatively thick, and heating the entire electrode group cannot fully soften the glue inside the electrode group, and it is prone to partial softening or inconsistency in softening degree, which eventually leads to diaphragm and positive or negative electrode sheets inside the electrode group Bonding is not old, cross-layer or electrode groups become soft, etc.

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