Apparatus for manufacturing spiral electrode assembly
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAkihiro Kashiyama, Takayuki Aoi, Minoru Koda, Masaaki Kaneda
Life of this patent
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Abstract
A separator is inserted into a slit formed in a winding core. A negative electrode plate made of thin metallic foil is fed toward the winding core as being held around the circumferential surface of a tape suction drum that is rotatably supported. The tape suction drum and the winding core are brought in mutual contact under pressure with their respective axes in parallel, and the winding core is driven to rotate, so that the tape suction drum is synchronously rotated with the winding core, by means of the frictional force acting between them, whereby the negative electrode plate held on the tape suction drum is wound onto the winding core together with the separator.
Claims11
A method of manufacturing spiral electrode groups for batteries wherein a strip of positive electrode and a strip of negative electrode are overlaid upon one another with a separator therebetween and wound up in spiral form, comprising the steps of:
- providing a strip of separator to a winding core such that the separator is passed through a slit formed in said winding core in an axial direction and is subjected to a predetermined amount of tension;
- providing a strip of negative electrode plate made of a metal foil tape to the winding core from a tape suction drum having a rotation axis parallel to the winding core, said tape suction drum being supported rotatably around its axis and is detachably contacted with the winding core under a predetermined pressure;
- driving the winding core to rotate, for causing said tape suction drum to rotate synchronously in contact with the winding core by a frictional force acting therebetween, whereby the negative electrode plate held on said tape suction drum is transferred and taken up on the winding core;
- attaching a leading end of the negative electrode plate and overlapping same onto the separator at a position predetermined in relation to the separator;
- feeding a positive electrode plate toward the winding core;
- chucking a leading end of said positive electrode plate together with the separator at a position predetermined in relation to the separator until immediately before the positive electrode plate is taken up on the winding core;
- and
- driving the winding core to further rotate, for winding thereon said negative electrode plate, said separator, and said positive electrode plate in an overlapped condition.
An apparatus for manufacturing spiral electrode groups for batteries wherein a strip of positive electrode and a strip of negative electrode are overlaid upon one another with a separator therebetween and wound up in spiral form, comprising:
- a winding core having a slit formed in said winding core in an axial direction through which a separator is passed;
- a tape suction drum for holding by vacuum suction a strip of negative electrode plate made of a metal foil tape on a circumferential surface thereof, having a rotation axis parallel to said winding core, and being supported rotatably around its axis and is detachably contacted with the winding core under a predetermined pressure;
- means for feeding a positive electrode plate toward said winding core such as to be overlapped with said separator passing through the slit of the winding core;
- and
- means for driving said winding core to rotate, for causing said tape suction drum to rotate synchronously in contact with the winding core by a frictional force acting between the negative electrode plate and one of the winding core and the separator held thereon, whereby the negative electrode plate held on said tape suction drum is transferred and taken up on the winding core, together with the positive electrode and the separator in overlapped fashion.
Dependencies are inferred from the claim text.