FLAT TYPE BATTERY

• Main Authors: MAEDA, Takehiro, OUME, Ami, SAITO, Takamitsu, NITTA, Yoshiaki, MATSUO, Azusa
• Format: Patent
• Language: English; French; German
• Published: 03.11.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

[PROBLEM] To provide a flat type battery capable of preventing liquid depletion while maintaining a state in which pressure from an exterior member acts uniformly on a surface intersecting the layering direction of a power generating element. [SOLUTION] The flat type battery 100 comprises an electrolytic solution 10, and a power generating element 50 containing electrolyte layers 20 and a plurality of electrodes 30, 40 layered with each of the electrolyte layers therebetween, and the power generating element expands with use in the layering direction Z of the positive electrodes 30 and the negative electrodes 40. This flat type battery 100 further comprises an exterior member 110 forming a tightly sealed space 80 containing a space 60 in which the power generating element is housed, and an extra space 70. The extra space is formed between the exterior member and a side surface SS extending along the layering direction of the power generating element. The exterior member includes a volume adjustment portion 140 allowing for an increase in the volume of the extra space by expanding in response to a pressure rise inside the tightly sealed space while the exterior member is being pressed against the surfaces SU, SB intersecting the layering direction of the power generating element due to a pressure difference between the exterior and the interior. The volume adjustment portion allows for an increase in the volume of the extra space while maintaining the state in which the exterior member is pressed against the surfaces intersecting the layering direction of the power generating element.