Secondary cell and method for bonding lead thereof, and battery power supply

A battery power source device comprising a plurality of rechargeable batteries (1) stored in a pack case (2), said rechargeable battery storing a power generating element in an outer case (4) made of a laminated sheet and being formed in a flat, approximately prismatic shape, positive and negative electrode leads (11) and (12) of the batteries being extended in the same direction from a same lead extended edge of the outer case, the plurality of rechargeable batteries being arranged in parallel in said pack case such that their lead extending directions are in the same direction, a circuit board (3) including a conductive pattern and a battery protection device formed thereon being positioned on the lead extended edge of the rechargeable batteries, the positive and negative electrode leads of each said rechargeable battery being joined to a prescribed conductive pattern formed in the extending direction of each lead on the same surface of the circuit board, whereby a connection circuit formed by the conductive pattern on the circuit board connects each said rechargeable battery to an input/output terminal through the battery protection device.

A battery power source device comprising a plurality of rechargeable batteries (1) stored in a pack case (2), said rechargeable battery storing a power generating element in an outer case (4) made of a laminated sheet and being formed in a flat, approximately prismatic shape, said pack case including upper and lower cases (2a) and (2b) formed in a pair of halves, the upper and lower cases having position restriction walls to restrict a position to store the rechargeable batteries, the walls being formed around side surfaces of the plurality of rechargeable batteries, the lower case storing the plurality of rechargeable batteries being joined with the upper case between said position restriction walls and side circumferential walls for integrating both cases.

A battery power source device comprising a plurality of rechargeable batteries (1) stored in a pack case (2), said rechargeable battery (1) storing a power generating element in an outer case (4) made of a laminated sheet and being formed in a flat, prismatic shape, said pack case including an upper case (2a) and a lower case (2b) formed in a pair of halves, position restriction walls to restrict a position to store the rechargeable batteries, the walls being formed around side surfaces of the plurality of rechargeable batteries at the upper and lower cases, surfaces in contact with flat planes of the plurality of rechargeable batteries at the upper case and/or the lower case being formed into an elastic deforming surface elastically deforming corresponding to a change in a thickness of the rechargeable batteries, the lower case storing the plurality of rechargeable batteries being joined to the upper case between said position restriction walls and side circumferential walls for integrating both cases.

A lead joining method comprising the steps of providing a lead made of a metal foil on a land (21) formed by a conductive pattern at a surface of a circuit board (80), supporting a back surface of the circuit board by an anvil (91) of a ultrasonic welder, abutting a welding tip (92) against said lead, applying ultrasonic vibration to said welding tip as said welding tip presses toward the anvil, and joining said lead to said land by ultrasonic welding.

A battery power source device comprising a rechargeable battery (1) and a circuit board (80) having a power source circuit including a battery protection circuit, positive and negative electrode leads of a metal foil extended from the rechargeable battery being joined by ultrasonic welding to a prescribed land (21) formed by a conductive pattern on a surface of said circuit board.

A battery power source device comprising a rechargeable battery (102) storing a power generating element in an outer body made of a pair of laminated sheets, said pair of laminated sheets being thermally sealed at peripheries thereof, said rechargeable battery being formed in a plate shape whose positive and negative electrode leads (114) and (115) are extended to the outside from one lead extended edge;

• and a circuit board (103) having at least a battery protection circuit, said rechargeable battery and said circuit board being integrated, said rechargeable battery being secured on a metal plate (105).

A battery power source device comprising a rechargeable battery (201) and a circuit board (206) having a power source circuit, said rechargeable battery storing a power generating element in an outer case made of a pair of laminated sheets having their peripheries sealed by welding and being formed in a flat, approximately prismatic shape, positive and negative electrode leads of the battery being extended to the outside from one lead extended edge sealed by welding,

• said positive and negative electrode leads being connected in prescribed positions on said circuit board, the circuit board being provided on said lead extended edge, the circuit board being attached and secured to the rechargeable battery by an adhesive sheet.

A battery power source device comprising a plurality of rechargeable batteries (201) arranged in parallel having their lead extended edges arranged in the same direction, said rechargeable battery storing a power generating element in an outer case made of a pair of laminated sheets having their peripheries sealed by welding and being formed in a flat, prismatic shape, positive and negative electrode leads of the rechargeable battery being extended to the outside from one lead extended edge sealed by welding, adjacent rechargeable batteries being joined with an adhesive between their side surfaces, said positive and negative electrode leads of the rechargeable batteries being connected in prescribed positions on a circuit board (206) having a power source circuit, the circuit board being provided on said lead extended edge, a binding member being attached around side peripheries of the rechargeable batteries arranged in parallel.

A rechargeable battery comprising a power generating element stored in an outer case made of a pair of laminated sheets having their peripheries sealed by welding, the battery being formed in a flat, approximately prismatic shape, positive and negative electrode leads of the battery being extended to the outside from one lead extended edge sealed by welding, a double-faced adhesive sheet (321) to secure the rechargeable battery in a prescribed position being attached on a flat surface of the rechargeable battery, a lining sheet of the double-faced adhesive sheet having a part (322) not provided with an adhesive at an arbitrary side of the double-faced adhesive sheet.

A battery power source device comprising:

• a rechargeable battery (1) storing a power generating element in an outer case made of a pair of laminated sheets having their peripheries sealed by welding and being formed in a flat, approximately prismatic shape, positive and negative electrode leads (11) and (12) of said battery being extended from one lead extended edge sealed by welding;
• and a circuit board (80) having a land onto which each of the positive and negative electrode leads is joined by ultrasonic welding, the rechargeable battery and the circuit board being positioned such that said lead is bent at the time of said ultrasonic welding and securing to a prescribed position.