Lead-acid battery and method for manufacturing current collector for lead-acid battery

摘要

Provided herein is a lead-acid battery for which the risk of breakage of a current collecting lug part of a plate while in use is eliminated by simple means. At least a positive plate group of the lead-acid battery includes: one or more plates each including a current collector having a current collecting portion formed by expanding or punching a lead alloy sheet manufactured by cold rolling, and one or more current collecting lug parts unitarily formed with the current collecting portion; and a strap formed by a cast-on strap casting method and coupled to the one or more current collecting lug parts. The current collecting lug part is formed with an elongated protrusion extending in a direction away from the current collecting portion. The elongated protrusion continuously extends in a direction toward the current collecting portion of the plate from inside the strap.

主权项

1. A lead-acid battery comprising:
a positive plate group; and a negative plate group, the positive plate group and the negative plate group each comprising:
one or more plates each including a current collector having a current collecting portion formed by expanding or punching a lead alloy sheet manufactured by cold rolling, and one or more current collecting lug parts unitarily formed with the current collecting portion; anda strap formed by a cast-on strap casting method and coupled to the one or more current collecting lug parts, wherein: the one or more current collecting lug parts included in the positive plate group are each formed with one or more elongated protrusions extending in a direction away from the current collecting portion, the one or more elongated protrusions being formed to protrude on one surface of the current collecting lug part as a result of forming one or more elongated depressions in the other surface of the current collecting lug part at a position corresponding to the one or more elongated protrusions; and the one or more elongated protrusions each continuously extend in a direction toward the current collecting portion of the plate from inside the strap.