Abstract: This electrochemical device includes a first frame, a second frame, and a laminated electrochemical element having a housing encasing an element. Outer edges of the housing are sandwiched between the first frame and the second frame. Hook members are provided on one of the first frame and the second frame, and indentations engaging the hook members are provided on the other one of the frames, thereby fixing the relative positional relationship between the first frame and the second frame.

Abstract: An electrochemical device 1A has first and second electrode pads 5a and 5b on the upper surfaces 11 of protrusions 3a and 3b, and has first and second electrode pads 7a and 7b on the lower surfaces 13 of the protrusions 3a and 3b. First and second foil electrode terminals 261a and 261b of an electrochemical element 251 are electrically connected to the first and second electrode pads 5a and 5b, respectively. First and second foil electrode terminals 262a and 262b of an electrochemical element 252 are electrically connected to the first and second electrode pads 7a and 7b, respectively.

Abstract: An electrochemical device 1A has first and second electrode pads 5a and 5b on the upper surfaces 11 of protrusions 3a and 3b, and has first and second electrode pads 7a and 7b on the lower surfaces 13 of the protrusions 3a and 3b. First and second foil electrode terminals 261a and 261b of an electrochemical element 251 are electrically connected to the first and second electrode pads 5a and 5b, respectively. First and second foil electrode terminals 262a and 262b of an electrochemical element 252 are electrically connected to the first and second electrode pads 7a and 7b, respectively.

Abstract: This electrochemical device includes a first frame, a second frame, and a laminated electrochemical element having a housing encasing an element. Outer edges of the housing are sandwiched between the first frame and the second frame. Hook members are provided on one of the first frame and the second frame, and indentations engaging the hook members are provided on the other one of the frames, thereby fixing the relative positional relationship between the first frame and the second frame.

Abstract: A voltage detection circuit 1A comprises a coil 5 connected between positive and negative terminals of a battery 3 through input terminals T1 and T2, and an MR device RM magnetically coupled to the coil 5. Employing such a structure makes it possible to detect the voltage of the battery 3 in real time according to a change of magnetic resistance in the MR device RM.