Secondary battery protecting module and lead mounting method

Abstract

In a lead mounting method of mounting, onto a principal surface of a printed board, a lead to be connected to a terminal, a flat lead is prepared which lead has a mounted part to be disposed on the principal surface of the printed board and a connected part to be connected to the terminal. The flat lead is bent into an L shape so that the mounted part and the connected part are perpendicular to each other to obtain an L-shaped lead. The mounted part of the L-shaped lead is connected and fixed onto the principal surface of the printed board by soldering.

1 . A lead mounting method of mounting, onto a principal surface of a printed board, a lead to be connected to a terminal, said method comprising the steps of: 
 preparing a flat lead which has a mounted part to be disposed on the principal surface of said printed board and a connected part to be connected to said terminal;    bending said flat lead into an L shape so that said mounted part and said connected part are perpendicular to each other to obtain an L-shaped lead; and    connecting and fixing the mounted part of said L-shaped lead onto the principal surface of said printed board by soldering.    
     
     
         2 . A lead mounting method as claimed in  claim 1 , wherein said terminal is a terminal of a secondary battery.  
     
     
         3 . A lead mounting method as claimed in  claim 1 , wherein said lead is a nickel lead.  
     
     
         4 . A secondary battery protection module comprising: 
 a printed board having a principal surface and a back surface opposite to each other;    a protection circuit disposed on the principal surface of said printed board for protecting a secondary battery;    switching means disposed on the principal surface of said printed board for turning on and off discharge and charge of said secondary battery under control of said protection circuit; and    a pair of L-shaped leads disposed on the principal surface of said printed board to be connected to an anode terminal and a cathode terminal of said secondary battery, wherein:    each of said L-shaped leads is mounted on the principal surface of said printed board by soldering with each of said L-shaped leads preliminarily formed by bending a flat lead into an L shape.    
     
     
         5 . A secondary battery protection module as claimed in  claim 4 , further comprising a pair of external connection terminals mounted on the rear surface of said printed board.  
     
     
         6 . A secondary battery protection module as claimed in  claim 4 , wherein each of said L-shaped leads has a mounted part to be mounted on said printed board, said mounted part having a length in a bending direction not greater than a length of a land formed on said printed board.  
     
     
         7 . A secondary battery protection module as claimed in  claim 5 , wherein each of said L-shaped leads has a mounted part to be mounted on said printed board, said mounted part having a length in a bending direction not greater than a length of a land formed on said printed board.