Rechargeable battery including a channel member

A rechargeable battery, comprising:

• an electrode assembly capable of being charged and discharged;
• a case accommodating the electrode assembly;
• a cap assembly, the cap assembly including:
• a cap plate coupled to an opening of the case, and
• a vent member in the cap plate, the vent member being configured to open at a predetermined internal pressure,
• a terminal exposed to an outer side of the cap plate;
• a lower insulating member, the lower insulating member insulating the terminal and the cap plate at a lower side of the cap plate;
• and
• a channel member between the electrode assembly and the cap plate and forming a space, the channel member:
• being fixed to the lower insulating member,
• including a blocking plate below the vent member, and
• including auxiliary holes in the blocking plate, the auxiliary holes penetrating through the blocking plate across an entire widthwise direction of the blocking plate such that each auxiliary hole continuously extends from one side of the case to another side of the case.