BATTERY CELL AND BATTERY PACK

• Main Authors: SONG CHI, EGUCHI MASAYUKI
• Format: Patent
• Language: English; Japanese
• Published: 19.11.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a battery cell having an excellent heat transfer suppressing effect, having a strength capable of suppressing a decrease in the thickness of a heat insulating material even when the battery cell expands, and including a heat transfer suppressing portion capable of maintaining heat insulating performance.SOLUTION: In a battery cell 10 constituting a plurality of stacked battery packs connected in series or in parallel and having a power generation element and a battery case 11 for storing the power generation element, at least one surface 12 of the surfaces perpendicular to the stacking direction in the battery case 11 has a convex portion 14, a first heat insulating material 20 is arranged in a concave portion 15 which is an example of a place other than the convex portion 14, the thermal conductivity of the first heat insulating material 20 is lower than the thermal conductivity of the convex portion 14, and the compressive strength of the convex portion 14 is higher than the compressive strength of the first heat insulating material 20.SELECTED DRAWING: Figure 1 【課題】熱伝達抑制効果に優れるとともに、電池セルが膨張した際にも、断熱材の厚さの減少を抑制可能な強度を備え、これにより断熱性能を維持可能な熱伝達抑制部を備える電池セルを提供する。【解決手段】発電要素及び該発電要素を収納する電池ケース１１を有し、直列又は並列に接続された状態で複数積層されて組電池を構成する電池セル１０であって、電池ケース１１における積層方向に垂直な面のうち少なくとも一方の面１２において、凸部１４を有するとともに、凸部１４以外の場所の一例である凹部１５には、第１の断熱材２０が配置されており、第１の断熱材２０の熱伝導率が、凸部１４の熱伝導率よりも低く、かつ、凸部１４の圧縮強度が、第１の断熱材２０の圧縮強度よりも高い、電池セル１０。【選択図】図１