BATTERY

To provide a battery capable of suppressing a ratio of increase in resistance in an event of high-rate charging/discharging.SOLUTION: A first point (A) represents a point located in a first electrode plate at a boundary between a first region and a second region at an outermost circumference on a first outer surface side. A second point (B) represents an end portion of a connection surface of a first current collector connected to the second region of the first electrode plate, the end portion being located on a first region side. A first straight line (L1) represents a straight line passing through a center of a thickness of an electrode assembly in a second direction and extending in parallel with a winding axis. A second straight line (L2) represents a straight line extending in parallel with the first straight line and passing through the second point (B). A third straight line (L3) represents a straight line passing through the first point (A) and the second point (B). On this occasion, a first angle (θ1) formed between the second straight line (L2) and the third straight line (L3) is more than 55°. Further, a first length (D1) represents a straight line distance between the first point (A) and the second point (B), and a second length (D2) represents a length of a first electrode core body located between the first point (A) and the second point (B). On this occasion, the second length (D2) is 1 time or more and 1.1 times or less as large as the first length (D1).SELECTED DRAWING: Figure 3 【課題】ハイレート充放電時の抵抗増加率を抑制することが可能な電池を提供する。【解決手段】第１外面側の最外周に位置する第１電極板における第１領域と第２領域の境界に位置する点を第１の点（Ａ）とする。第１電極板の第２領域と接続される第１集電体の接続面の第１領域側の端部を第２の点（Ｂ）とする。電極体の第２方向の厚みの中心を通り、巻回軸と平行に延びる直線を第１直線（Ｌ１）とする。第１直線と平行に延び、第２の点（Ｂ）を通過する直線を第２直線（Ｌ２）とする。第１の点（Ａ）と第２の点（Ｂ）とを通過する直線を第３直線（Ｌ３）とする。このとき、第２直線（Ｌ２）と第３直線（Ｌ３）とのなす第１の角度（θ１）が５５°よりも大きい。また、第１の点（Ａ）と第２の点（Ｂ）との間の直線距離を第１の長さ（Ｄ１）、第１の点（Ａ）と第２の点（Ｂ）との間に位置する第１電極芯体の長さを第２の長さ（Ｄ２）とする。このとき、第２の長さ（Ｄ２）は、第１の長さ（Ｄ１）の１倍以上１．１倍以下である。【選択図】図３