Method for manufacturing batteries and battery obtained by said method

A Method for manufacturing a battery, said battery comprising at least one anode (3) and at least one cathode (1), disposed one above the other in an alternating manner, said battery (100) comprising longitudinal edges (103, 104) and lateral edges (101, 102), in which the anode (3) comprises:

• a current collector substrate,
• at least one anode layer, and
• optionally a layer of an electrolyte material or of a separator impregnated with an electrolyte,
• and the cathode comprises:
• a current collector substrate,
• at least one cathode layer, and
• optionally a layer of an electrolyte material or of a separator impregnated with an electrolyte,
• so that the battery comprises successively at least one anode layer, at least one layer of an electrolyte material or of a separator impregnated with an electrolyte, and at least one cathode layer,
• each anode (3) comprising an anode connection area, located in the vicinity of the first lateral edge of the battery, whereas each cathode (1) comprises a cathode connection area, situated on a second lateral edge of the battery, opposite to said first edge, said manufacturing method comprising:
• a) the provision of a stack (1) of alternating sheets, this stack comprising first sheets or anode sheets, each of which is intended to form an anode layer of a plurality of batteries, as well as second sheets or cathode sheets, each of which is intended to form a cathode layer of a plurality of batteries,
• each anode sheet comprising at least one anode slot (34) and each cathode sheet comprising at least one cathode slot (14), said slot, respectively anode and cathode, comprising two longitudinal parts (16, 36) at least partly superimposed, intended to delimit the longitudinal edges (103, 104) of the battery, as well as a lateral part (18, 38) connecting said two longitudinal parts, the lateral part of the anode slot (38) and the lateral part of the cathode slot (18) being mutually offset, it being understood that each lateral part of the slots delimits a space free from any electrode material, electrolyte and current-collector substrate, said free space separating, for each anode and each cathode, a main body from a secondary body,
• b) the implementation of a heat treatment and/or of a mechanical compression of the stack of alternating sheets previously provided,
• c) the production of two cutouts (Dn, D′n) extending at least partially inside said slots, the first cutout extending between the lateral part of the anode slot and the facing end of the longitudinal parts, whereas the second cutout extends between the lateral part of the cathode slot and the facing end of the longitudinal parts.