BATTERY PACK

• Main Authors: TAKATSUJI, Yuki, ONO, Michinobu, TSUJIGUCHI, Ryusuke, TADA, Manabu
• Format: Patent
• Language: English; French; German
• Published: 07.04.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A chain of thermal runaway is prevented between a plurality of secondary battery cells laterally aligned. A battery pack (100) includes: a first secondary battery cell (lA) and a second secondary battery cell (1B) each having a cylindrical shape and connected in series and/or in parallel with each other; a housing case (10) that includes an internal space for housing the first secondary battery cell (lA) and the second secondary battery cell (1B) aligned in such postures that side surfaces of the cylindrical shapes face each other; and a longitudinal partition plate (30) having a thermal insulation property, and disposed at an interface between the first secondary battery cell (lA) and the second secondary battery cell (1B) housed in the internal space of the housing case (10), at the interface the side surfaces of the cylindrical shapes of the first and second secondary battery cells (1A, 1B) facing each other, to electrically insulate the first secondary battery cell (1A) from the second secondary battery cell (1B). The longitudinal partition plate (30) constitutes a first thermal insulator (51) that projects from a side facing the side surface of the cylindrical shape of the first secondary battery cell (lA) to come into contact with the side surface of the cylindrical shape of the first secondary battery cell (lA), and constitutes a second thermal insulator (52) that projects from a side facing the side surface of the cylindrical shape of the second secondary battery cell (1B) to come into contact with the side surface of the cylindrical shape of second secondary battery cell (1B).