NOVELTY - An assembled linear stack of electrochemical cell component comprises 5-30 lithium-ion cells flat-layer anode components, with opposing layer faces, interspersed in linear stack portion (S1) with equal number of lithium-ion cell flat-layer cathode components with opposing layer faces, porous separator layer component with opposing faces, and linear stack portion (S2) comprising porous separator layer (L1), a reference electrode component (C1), a porous separator layer (L2) and reference electrode component (C2).    USE - Assembled linear stack of electrochemical cell component is used for battery pouch (claimed) for lithium-ion battery used in electric vehicle and hybrid vehicle.    ADVANTAGE - The assembled linear stack of electrochemical cell component enables accurate assessment of pouch performance and validates and regenerates reference electrode capability by combining pair of reference electrodes in specific arrangement with other cell components.    DETAILED DESCRIPTION - An assembled linear stack of electrochemical cell component comprises 5-30 lithium-ion cells flat-layer anode components with opposing layer faces, interspersed in linear stack portion (S1) with equal number of lithium-ion cell flat-layer cathode components with opposing layer faces, porous separator layer component with opposing faces, and linear stack portion (S2) comprising porous separator layer (L1), a reference electrode component (C1), a porous separator layer (L2) and reference electrode component (C2). The porous separator layer (L1) is placed against porous copper current collector foil face of two-layer anode component. The reference electrode components (C1,C2) comprise porous aluminum or porous copper current collector foil layer covered on at least one face with reference electrode material. The reference electrode material on both reference electrodes is same and chosen from lithium iron phosphate and lithium titanate. One separator layer face co-extensively covering layer of porous lithium-ion cell cathode material at end (E2) of linear stack portion (S1) and two-layer lithium-ion cell anode component placed against the opposite face of the porous separator layer component. The two-layer lithium-ion cell anode component consisting of porous layer of lithium-ion cell anode material carried on porous copper foil. The anode material is against opposite face of separator layer. The flat-layer anode and cathode components have face-like shapes. The face of each anode components is coextensively separated from face of adjacent cathode component in linear stack portion (S1) by porous separator layer component. Anode component comprises a copper foil current collector (14) coated on both foil faces with a layer of porous lithium-ion cell anode material. Each cathode component comprises aluminum foil current collector layer coated on both foil faces with a layer of porous lithium-ion cell cathode material. The linear stack portion (S1) has three-layer cathode component at end (E1) of the linear stack portion (P1) and three-layer anode portion at opposite end (E2) of the linear stack portion (S1). An INDEPENDENT CLAIM is included for battery pouch.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the assembled linear stack of electrochemical cell component.    Anode (12)    Copper foil current collector (14)    Active anode material (16)    Separator (18)    Uncoated tab (22)