NOVELTY - The stack type lithium-ion battery comprises first electrodes having a current collector made of a metal sheet, an active material mixture layer (1a), a portion (4) in which the metal is exposed, and a protective layer formed between a separator and the portion of the first electrode. Each of the first electrodes faces second electrodes across the separator. The protective layer is made of a material having a lower electron conductivity than that of the metal sheet and is non-insulative.    USE - The stack type lithium-ion battery is useful for a power source of mobile information terminal devices such as mobile-phones, notebook computers and personal digital(data) assistants, and for applications as robots, electric vehicles and backup power sources.    ADVANTAGE - The stack type lithium-ion battery can be reliably, easily, safely and economically manufactured with high energy density and capacity, and improved life span.    DETAILED DESCRIPTION - The stack type lithium-ion battery comprises first electrodes having a current collector made of a metal sheet, an active material mixture layer (1a), a portion (4) in which the metal is exposed, and a protective layer formed between a separator and the portion of the first electrode. Each of the first electrodes faces second electrodes across the separator. The protective layer is made of a material having a lower electron conductivity than that of the metal sheet and is non-insulative. The separator and the portion of the first electrode are jointed by the protective layer. The first and second electrodes comprise: positive electrode plates (1) having respective positive electrode current collector leads (11) protruding from the positive electrode plates; negative electrode plates having respective negative electrode current collector leads protruding from the negative electrode plates; and a stacked electrode assembly having the positive and negative electrode plates that are alternately stacked on one another across the separator that is interposed between the positive and negative electrode plates. The protective layer is formed additionally on the active material mixture layer near a boundary between the active material mixture layer of a positive electrode plate and the portion of the positive electrode plate. The separator is formed in a pouch shaped manner. Each of the first electrodes is enclosed in a pouch-shaped separator (3). The positive electrode plate is enclosed in the pouch-shaped separator, which comprises a folded separator and is intermittently joined at a perimeter portion of the separator or overlapped. A number of the positive electrode plates in the stacked electrode assembly is greater than or equal to 15. Each of the electrodes has the current collector lead having a width of greater than or equal to 30 mm. The protective layer: protrudes between the portion of the electrodes and an outside of the separator; and comprises an insulative polymer substance, and a powder dispersed in the insulative polymer substance. The powder comprises an electron conductive carbonaceous material, a semiconductor material, and a conductive oxide. An INDEPENDENT CLAIM is included for a method of manufacturing a stack type battery.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a stack type battery.    Positive electrode plates (1)    Active material mixture layer (1a)    Pouch-shaped separator (3)    Portion (4)    Positive electrode current collector leads. (11)