Patent ID: 11945050
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 0:
1. An electrode sheet manufacturing apparatus comprising:
a laser irradiation device configured to irradiate a sheet stack including an electrode composite material layer and a separator provided on the electrode composite material layer, with a first laser beam having a wavelength to be absorbed by the separator and a second laser beam having a wavelength to be absorbed by the electrode composite material layer, an electrode sheet being formed as the sheet stack is cut by being irradiated with the first laser beam and the second laser beam; and
a controller configured to control driving of the laser irradiation device,
wherein
the laser irradiation device comprises:
a first laser oscillator that emits the first laser beam;
a second laser oscillator that emits the second laser beam;
an X-axis scanning mirror that reflects the first laser beam, wherein the X-axis corresponds to a width direction of the sheet stack;
a Y-axis scanning mirror that reflects the second laser beam, wherein the Y-axis corresponds to a length direction of the sheet stack;
a first motor that adjusts a position of the X-axis scanning mirror to adjust the position of the first laser beam; and
a second motor that adjusts a position of the Y-axis scanning mirror to adjust the position of the second laser beam;

the controller is configured to:
control driving of the first motor such that an irradiation position of the first laser beam moves relative to the sheet stack;
control driving of the second motor such that an irradiation position of the second laser beam moves so as to follow a track of the irradiation position of the first laser beam, and

wherein the first motor and the second motor are driven such that a distance between the irradiation position of the first laser beam and the irradiation position of the second laser beam in a moving direction of the first laser beam in the sheet stack is equal to or larger than a value obtained by multiplying a time from when the separator is irradiated with the first laser beam until when the separator melts and a moving speed of the irradiation position of the second laser beam in the sheet stack.