Solid-state battery module

Abstract

In the present invention, a residual space in a battery cell, which is necessary for the lithium ion secondary batteries employing the liquid electrolyte is eliminated, and additionally a module component is disposed in a portion that would provide the residual space.

1 . A solid-state battery module comprising a plurality of solid-state batteries and a module component, wherein
 the plurality of solid-state batteries are arranged so as to be substantially parallel to a predetermined direction,   each of the plurality of solid-state batteries comprises a solid-state battery cell, and a battery case for accommodating the solid-state battery cell,   wherein the solid-state battery cell comprises a positive electrode, a negative electrode, a solid electrolyte present between the positive electrode and the negative electrode, a positive electrode tab connected to the positive electrode, and a negative electrode tab connected to the negative electrode,   wherein an outer dimension of the battery case is substantially identical to an outer dimension of the solid-state battery cell, and   wherein the battery case comprises a recess, and   the module component is disposed in the recess.   
     
     
         2 . The solid-state battery module according to  claim 1 , wherein the module component is at least one selected from the group consisting of a bus bar, a thermistor, a harness, a voltage detection line, a battery case fixing member, and a cell voltage and temperature monitoring unit. 
     
     
         3 . The solid-state battery module according to  claim 1 , wherein the battery case comprises at least one convex portion, and
 the positive electrode tab and the negative electrode tab are stored in the convex portion.   
     
     
         4 . The solid-state battery module according to  claim 1 , wherein the battery case comprises at least two convex portions, and
 the positive electrode tab and the negative electrode tab are each stored in a different convex portion.   
     
     
         5 . The solid-state battery module according to  claim 4 , wherein the convex portion for storing the positive electrode tab and the convex portion for storing the negative electrode tab are provided on same face in the battery case. 
     
     
         6 . The solid-state battery module according to  claim 4 , wherein the convex portion for storing the positive electrode tab and the convex portion for storing the negative electrode tab are provided on different faces in the battery case. 
     
     
         7 . The solid-state battery module according to  claim 1 , wherein the battery case is made of metal,
 a face constituting the battery case which is substantially parallel to the predetermined direction comprises a pressing portion for applying a surface pressure to the solid-state battery cell, and   a gap is defined between two adjacent solid-state batteries of the plurality of solid-state batteries by the pressing portion.   
     
     
         8 . The solid-state battery module according to  claim 7 , wherein the pressing portion is provided only on one face of the battery case. 
     
     
         9 . The solid-state battery module according to  claim 7 , wherein the pressing portion is provided on a set of opposing faces of the battery case. 
     
     
         10 . The solid-state battery module according to  claim 6 , wherein at least one selected from the group consisting of air, water, a heat transfer material, a heater and the like, and an electrically insulating material or an electrically conductive material, a cushioning material and a battery case fixing member and the like is present in the gap. 
     
     
         11 . The solid-state battery module according to  claim 6 , wherein a heat sink is disposed in the pressing portion. 
     
     
         12 . The solid-state battery module according to  claim 11 , wherein the heat sink is a fin or an uneven structure. 
     
     
         13 . The solid-state battery module according to  claim 1 , wherein the solid-state battery comprises an expansion material between the solid-state battery cell and the battery case, and
 the expansion material expands in volume by water absorption or a chemical reaction, or changes in volume by heat.   
     
     
         14 . An apparatus comprising the solid-state battery module according to  claim 1 .