Patent ID: 9017843
Filing Date: 2015-04-28
Classification: H01M,Y02E,Y02P

Abstract:
1. A plurality of prismatic secondary batteries connected in series or parallel comprising: a prismatic hollow outer body having a mouth and a bottom; an electrode assembly including a positive electrode sheet and a negative electrode sheet, a positive electrode collector electrically connected to the positive electrode sheet, a negative electrode collector electrically connected to the negative electrode sheet, and an electrolyte, all being stored in the prismatic hollow outer body; a sealing plate sealing up the mouth of the prismatic hollow outer body; and a positive electrode terminal and a negative electrode terminal attached to the sealing plate in a manner electrically insulated from the sealing plate, while electrically connected to the positive electrode collector and the negative electrode collector, respectively, on the sealing plate, the positive electrode terminal being fixed on one end side in a longitudinal direction of the sealing plate and the negative electrode terminal being fixed on the other end side, the gas release valve and an electrolyte pour hole being formed in the sealing plate between the positive electrode terminal and the negative electrode terminal, the sealing plate including a front face having an identification code formed on a side opposite to a side having the electrolyte pour hole with respect to the gas release valve in a longitudinal direction of the sealing plate; wherein each of said plurality of prismatic secondary batteries has a unique identification code, and wherein the front face of the sealing plate is provided with a concaved flat face formed on the side opposite to the side having the electrolyte pour hole with respect to the gas release valve in the longitudinal direction of the sealing plate, the concaved flat face has a height less than that of the peripheral portions of the concaved flat face, and the identification code is formed on the concaved flat face.