BATTERY SYSTEM, VEHICLE INCLUDING BATTERY SYSTEM, AND POWER STORAGE DEVICE

• Main Authors: ISHIBASHI, KENGO, MITSUBORI, SHINICHI, FUJINAGA, KOJI
• Format: Patent
• Language: English
• Published: 07.10.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

In order to achieve excellent flexural rigidity while employing a simple structure for end plate (3): a battery system includes: a battery stack (2) including a plurality of rectangular battery cells (1) that are stacked; end plate (3) placed at both ends of the battery stack; and a binding bar (4) that connects the end plates to fix the battery stack in a compressed state. End plate (3) includes plates (5) placed on both surfaces and plate-shaped block (6) laminated between plates (5); plates (5) include outer plate (5A) and inner plate (5B); plate-shaped block (6) includes dual-side blocks (7) placed on both sides so as to be separated from each other and intermediate block (8) placed in tapered groove (9) between dual-side blocks; the tapered groove (9) has a taper shape that gradually increases in width from an outside to an inside of the end plate (3). The intermediate block (8) is placed in facing surfaces (9A) of the tapered groove (9) in a slidable manner; the dual-side blocks (7) are fixed to the plates; and intermediate block (8) pressed by battery stack (2) is press-fitted into tapered groove (9) and end plate (3) applies tensile stress to outer plate (5A) and inner plate (5B) via dual-side blocks (7).