NOVELTY - A cell alignment structure (810) for electrochemical device comprises: array of electrically insulating cell receptacles, where each cell receptacle is configured to receive and support at least bottom portion of electrochemical cell (840), and array of cell receptacles is configured to provide determined spacing between adjacent electrochemical cells received in cell receptacles.    USE - As cell alignment structure for electrochemical device; inner battery packaging assembly for electrochemical device; outer battery packaging assembly for electrochemical device; insulated cover for electrochemical device; and electrochemical device (all claimed) as multi-cell array batteries for fork lift or mining vehicle application.    ADVANTAGE - The cell alignment structure allows to develop battery with features and characteristics that make battery more easily manufactured and serviced, where the battery is multi-cell array battery operated at high temperatures (e.g. greater than or equal to 300 degrees C); versus batteries that are currently available. The multi-cell array battery has inner battery packaging assembly (containing several electrochemical cells) that resides within larger (e.g. outer) battery packaging assembly. The inner and outer packaging assemblies are configured such that assemblies and/or multi-cell array battery is/are more easily manufactured and serviced. The stacked configuration of several outer battery packaging assemblies within rack assembly, provides modular configuration of batteries that can be easily modified (i.e. batteries can be added or taken away) as application requirements change. Furthermore, stacked configuration minimizes footprint of multiple outer packaging assemblies. The outer packaging assembly is configured to have complementary features (e.g. mating features), allowing outer packaging assembly to be vertically stacked within rack with other similar battery packaging assemblies.    DETAILED DESCRIPTION - A cell alignment structure (810) for electrochemical device comprises: array of electrically insulating cell receptacles, where each cell receptacle is configured to receive and support at least bottom portion of electrochemical cell (840), and array of cell receptacles is configured to provide determined spacing between adjacent electrochemical cells received in cell receptacles. The structure further comprises stabilizing section configured to fit over respective electrode portions of several electrochemical cells received in cell receptacles, and stabilizing section is configured to accept electrode portions of several electrochemical cells through it; and several interleaved mechanical We devices attached to array of cell receptacles and configured to provide holding tension between each cell receptacle and associated electrochemical cell. The array of cell receptacles is extruded structure, injection molded structure, die-cast structure, folded structure, rolled structure, stamped structure, welded structure, and/or interlaced structure. Each of cell receptacles is configured to mate with bottom portion of inserted electrochemical cell. The array of cell receptacles is configured to interconnect with at least one other similar array of cell receptacles to form larger array of cell receptacles. The cell alignment structure is configured to have complementary features allowing cell alignment structure to be stacked in relation to similar cell alignment structure. The array of cell receptacles includes at least one built-in cooling channel. INDEPENDENT CLAIMS are included for the following:    (1) inner battery packaging assembly (800) for electrochemical device, comprising: the cell alignment structure; base plate (820) configured to be disposed below cell alignment structure; and cover configured to fit over cell alignment structure and removably attach to base plate;    (2) outer battery packaging assembly for electrochemical device, comprising: the inner battery packaging assembly; outer support plate configured to be disposed below inner battery packaging assembly; thermal insulating material (850) removably surrounding at least portion of inner battery packaging assembly; and outer battery cover configured to fit over inner battery packaging assembly, and over thermal insulating material, and removably attach to outer support plate;    (3) insulated cover for electrochemical device, comprising: inner battery cover configured to fit over inner battery assembly; outer battery cover nested over inner battery cover, where outer battery cover is attached to base portion of inner battery cover along perimeter portion of outer battery cover forming sealed space between them; and thermal insulating material occupying at least portion of scaled space; and    (4) electrochemical device comprising: array of electrically insulating cell receptacles; several electrochemical cells having bodies and top and bottom portions at distal ends of bodies, where bottom portion of cells are respectively received in and supported by cell receptacles; stabilizing section engaging top portions of cells; base plate positioned under array of electrically insulating cell receptacles; and cover positioned over stabilizing section and removably attached to base plate.    DESCRIPTION OF DRAWING(S) - The figure shows the inner battery packaging assembly of electrochemical device.    Inner battery packaging assembly (800)    Cell alignment structure (810)    Base plate (820)    Inner cover (830)    Electrochemical cells (840)    Removable insulating sheets (850)