Batteries with Terminals
Highly Reliable Terminal Welding
of applications, obviating eliminating the need for reinforcement or other such means.
(1) Using a laser to weld terminals(2) Execution of pre-soldering
Panasonic uses a
laser welding method to weld the terminals onto the batteries so they can be mounted onto PC boards by soldering. This method has the effect of boosting the tensile strength accompanying a welding strength to approximately 100N (approx.10kgf) compared with 20N to 50N (approx. 2 to 5 kgf) yielded by the conventional resistance welding method. The method also more or less cuts in half the individual variations occurring in the welding. Furthermore, it enables terminals to be welded onto thin batteries, such as those with a thickness of 1.6 mm, and it improves compatibility with many other uses. This highly reliable terminal soldering method can be used in a wide range The tips of the terminals are pre-soldered in order to enhance the reliability of the soldering.
Panasonic offers a full range of batteries with terminals for PCB mounting. Since the terminals come in a variety of types, please contact Panasonic for further details. A more limited selection of simple battery holders to support the batteries is also available.
Pre-solderingPre-soldering Complete Line-up
Soldering
(1) Using a soldering iron
Do not allow the soldering iron to make direct contact with the bodies of the batteries. Proceed with the soldering quickly within 5 seconds while maintaining the iron tip temperature at about 350°C, and do not allow the temperature of the battery bodies to exceed 85°C.
Cautions
Example where the terminals were soldered straight onto a coin-type lithium battery, the terminals were connected to a PC board or other electronic components, and the heat generated by the soldering adversely affected the battery, resulting in a deterioration of the battery characteristics: Chapter 4 (2) Automatic dip-soldering bath
The heat generated when terminals are mounted using solder causes lithium to melt. Soldering with a dip-soldering bath can be used but do not allow the temperature of the battery bodies to exceed 85°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 to the residual heat retained. When a post-dipping temperature rise is observed, review the temperature conditions and consider a dipping time reduction or a way of forcibly cooling the batteries after dipping.
The industrial separator melts and becomes perforated. The positive and negative poles are welded together, causing "internal shorting." Batteries with Terminals and Soldering In terms of the battery characteristics, the open-circuit voltage and electrical capacity are both reduced. Basic conditions Dip-soldering bath temperatureDipping time
Number of dips260ËšC or lessWithin 5 sec.
Not more than 2 The battery loses its functions or it bursts in rare cases. Soldering
SolderCathode( * Consult Panasonic if the battery body temperature will exceed 85°C. TerminalWeldingCathode capLithium( Never Use Refl ow Soldering
note 1) Separator( note 2) Never use reflow soldering since doing so directly heats the battery surface to high temperatures, causing electrolyte leakage, deterioration of battery characteristics and risking bursting or ignition.
note 1)Metal whose melting point is about 180°C ( note 2)Non woven cloth of polypropylene whose melting point is about 165°C Chapter 4- 80