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Chapter 4
Batteries with Terminals and
Soldering Lithium Batteries
Chapter 4
Batteries with Terminals .78
Soldering .78
Chapter 3
Batteries with Terminals
obviating eliminating the need for reinforcement or other Highly Reliable Terminal Welding
Panasonic adopted the laser welding method to solder The tips of the terminals are pre-soldered in order to battery terminal onto the printed circuit board.
enhance the reliability of the soldering.
In the comparison of 20 series battery, while the ten- sile strength of conventional resistance welding method was 20-50N (about 2 to 5 kgf), laser welding method was 100N (about 10kgf) and the variations was comp- Complete Line-up
By using the laser welding method, terminal welding on a thin battery (1.4mm in thickness) is able to perform.
Panasonic offers a full range of batteries with terminals Since strengthening the welding etc. became unneces- for PCB mounting. Since the terminals come in a vari- sary, battery could be widely used to many applications.
ety of types, please contact Panasonic for further de- tails. A more limited selection of simple battery holders to support the batteries is also available.
Soldering
Cautions
Do not allow the soldering iron to make direct contact with the bodies of the batteries. Proceed with the sol- dering quickly within 5 seconds while maintaining the Example where the terminals were soldered straight onto acoin-type lithium battery, the terminals were connected to a Chapter 4
iron tip temperature at about 350°C, and do not allow PC board or other electronic components, and the heat gen-erated by the soldering adversely affected the battery, result- the temperature of the battery bodies to exceed 85°C.
ing in a deterioration of the battery characteristics: The heat generated when terminals are mounted using Soldering with a dip-soldering bath can be used by con- dition but do not allow the temperature of the battery bo- The separator melts and becomes perforated.
°C. It is important to note, depending on the temperature conditions inside the dipping device,that the battery body temperature may rise after dipping due The positive and negative poles are welded together, Batteries with T
to the residual heat retained. When a post-dipping te- mperature rise is observed, review the temperature co- nditions and consider a dipping time reduction or a way In terms of the battery characteristics, the open-circuit of forcibly cooling the batteries after dipping.
voltage and electrical capacity are both reduced.
Basic conditions
erminals and Soldering
The battery loses its functions or it bursts in rare cases.
Never Use Reflow Soldering
Please do not carry out re-flow welding except for there-flow corresponding batteries (ML-R and NBL-R).
Never use reflow soldering since doing so directly heats the battery surface to high temperatures, causing ele- ctrolyte leakage, deterioration of battery characteris- (note 1)Metal whose melting point is about 180°C tics and risking bursting or ignition.
(note 2)Non woven cloth of polypropylene whose melting point is about Chapter 3

Source: http://benology.bur.st/arduino/xxOther/Batteries.pdf

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