NOVELTY - Electrochemical unit for assembly with similar units during manufacturing a vehicle battery (10), comprises: a pouch comprising at least one set of electrodes and an electrolyte; and a number of spaced-apart, identically shaped, alternating, n-type and p-type semiconductor thermoelectric elements, each with opposing first and second faces. The pouch and its contents are shaped as a two-sided unit with opposing faces for general face to face contact in assembly with similar pouch units. The electrochemical unit requires heating or cooling during its operation.    USE - The electrochemical unit is useful for assembling with similar units during manufacturing a vehicle battery.    ADVANTAGE - The electrochemical unit: allows manufacturing battery provided with solid state cooling; enables improved heat flow; enhances the capabilities of the thermoelectric assembly.    DETAILED DESCRIPTION - Electrochemical unit for assembly with similar units during manufacturing a vehicle battery, comprises: a pouch comprising at least one set of electrodes and an electrolyte; and a number of spaced-apart, identically shaped, alternating, n-type and p-type semiconductor thermoelectric elements, each with opposing first and second faces. The pouch and its contents are shaped as a two-sided unit with opposing faces for general face to face contact in assembly with similar pouch units. The electrochemical unit requires heating or cooling during its operation, and each face of the pouch is defined by a first layer of a first polymer composition overlaid by at least a second polymer layer of a second polymer composition. The first polymer layer is in close contact with the electrolyte and with at least an electrode. The first faces of adjacent elements are electrically connected to form a first junction, and the second faces of adjacent elements are electrically connected to form a second junction. The first and second junctions are arranged to enable serial connection of the many elements. The elements and their associated junctions are generally co-extensive with, supported by, and attached to the first polymer layer to form an assembled thermoelectric device integral with the pouch structure. The device is activated by passing direct electric current to produce a cooling or a heating face in contact with the pouch face. The thermoelectric device is substantially covered by the second polymer layer. INDEPENDENT CLAIMS are also included for:    (1) a module (12) for assembly with similar modules during manufacturing vehicle battery, having capability for cooling or heating the module, comprising a substantially closed housing containing at least an electrochemical unit comprising a pouch containing electrodes and an electrolyte, where the electrochemical unit are adapted to receive, store and discharge electricity on demand, and the module housing is shaped as a two-sided unit with co-extensive opposing faces, housing faces each having a thickness and an interior and an exterior surface, faces having a perimeter, and a number of identically-shaped, spaced-apart alternating p-type and n-type semiconductor thermoelectric elements with opposing first and second faces. The faces are joined to a strip with edges, where each strip edge is attached to one of the face perimeters of the opposing faces to define the housing. The first faces of adjacent elements are electrically connected to form a first junction. The second faces of adjacent elements are electrically connected to form a second junction. The first and second junctions are arranged to enable serial electrical connection of many elements. The elements and their associated junctions are generally co-extensive with, supported by and attached to a face of the housing to form an assembled thermoelectric device integral with the module housing. The device is activated by passing direct electric current to produce a cooling or a heating face in contact with the module face; and    (2) a battery comprising many modules which have a temperature sensor, where the modules is secured in face to face relation and electrically interconnected to deliver electrical power at a predetermined current and voltage.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic perspective view of many battery modules arranged in a battery.    Battery (10)    Module (12)    Inlet (14)    Outlet (16)    Mounting frame (18)