Bushing which forms a terminal for a metal/ion electrochemical accumulator, formed through a hole which opens at one side and the other of a wall of the casing of the accumulator, comprising: - an electrically conductive male component , comprising at the inner side a passage which is intended to circulate a cooling fluid which has circulated along the longitudinal axis of the accumulator, the passage opening towards the outer side of the accumulator; - an electrically conductive female component adjusted so as to be tightened around a portion of the male component, at the outer side of the accumulator; - two electrically insulating washers which each comprise an abutment portion which is in surface abutment with pressure at the same time against one of the faces of the wall and a guiding portion which protrudes relative to the abutment portion and which is in contact with the edge of the hole ; the abutment portion of a washer being in abutment with pressure against the female component; the abutment portion of the other washer being in abutment with pressure against a portion of the male component, the male component comprising: - a thread which is intended to cooperate by means of screwing with another thread for the fixing and the electrical output of the accumulator; - a first diameter enlargement which is located below the thread and which acts as a diameter for crimping to the female component , and - a second diameter enlargement in continuation of the first which acts as a surface both for abutment with the electrical insulation washer and a surface for connection to a current collector which is intended to make the electrical connection with the electrochemical cell of the accumulator. - an electrically conductive male component , comprising at the inner side a passage which is intended to circulate a cooling fluid which has circulated along the longitudinal axis of the accumulator, the passage opening towards the outer side of the accumulator; - an electrically conductive female component adjusted so as to be tightened around a portion of the male component, at the outer side of the accumulator; - two electrically insulating washers which each comprise an abutment portion which is in surface abutment with pressure at the same time against one of the faces of the wall and a guiding portion which protrudes relative to the abutment portion and which is in contact with the edge of the hole ; the abutment portion of a washer being in abutment with pressure against the female component; the abutment portion of the other washer being in abutment with pressure against a portion of the male component, the male component comprising: - a thread which is intended to cooperate by means of screwing with another thread for the fixing and the electrical output of the accumulator; - a first diameter enlargement which is located below the thread and which acts as a diameter for crimping to the female component , and - a second diameter enlargement in continuation of the first which acts as a surface both for abutment with the electrical insulation washer and a surface for connection to a current collector which is intended to make the electrical connection with the electrochemical cell of the accumulator. <EOS>