Abstract: A battery includes a stacked electrode body which is formed by stacking sequentially a first electrode plate connected to a first electrode tab, a separator, and a second electrode plate connected to a second electrode tab; an electrolyte; a battery case which seals the stacked electrode body and the electrolyte; and a guidance structure which guides the electrolyte, which moves inside the battery case due to heat generated by the stacked electrode body, to a direction inclined from a direction of gravitational force and also guides the electrolyte to the first or the second electrode tab.

Abstract: A battery includes: a stacked electrode body in which a first electrode plate having a potential of a first polarity and a second electrode plate having a potential of a second polarity are stacked through a first separator; a battery case that stores the stacked electrode body in a hermetically sealed state and is charged to the potential of the first polarity; and a wall surface resin that is arranged between the battery case and the stacked electrode body stored in the battery case. A second temperature at which the wall surface resin is melted or shrunken is lower than a first temperature at which the first separator is melted or shrunken, and when the internal temperature of the battery case becomes equal to or higher than the second temperature, the battery case and the second electrode plate come into contact with each other or are short-circuited to each other.

Abstract: A battery module includes: a first electrical cell and a second electrical cell, each including a battery case having an electrode terminal with one between a concave portion and a convex portion; a fixing member for fitting to the one; and an interconnection member including an interconnection material, a waterproof resin for covering the interconnection material other than a portion that the interconnection material contacts the electrode terminal, and a first projection extending from the waterproof resin and formed around the contact portion, wherein the interconnection member is fixed between the first and the second electrical cells by the fitting, and the first projection surrounds the electrode terminal to improve air-tightness of the interconnection member.

Abstract: An electrical cell includes a first battery block including a first stacked electrode body formed by stacking a positive electrode plate and a negative electrode plate through a separator and a first spacer arranged on the first stacked electrode body; a second battery block that including a second stacked electrode body formed by stacking a positive electrode plate and a negative electrode plate through a separator and a second spacer arranged on the second stacked electrode body; a battery case containing the first battery block and the second battery block to contact the first spacer and the second spacer; and a sensor, wherein the sensor is arranged in a sensor arrangement region formed between the first spacer and the second spacer.

Abstract: This lithium ion secondary battery includes a cathode (3) including multiple oxide containing lithium as a cathode active material and Li2MnSiO4 which is different from the cathode active material and which is mixed or blended into the cathode active material as a doping material of lithium ions, and an anode (2).