Battery Assembly Bus Bar Extension for Temperature Sensing

The bus bar is segmented into two functional zones: a current conduction region (between adjacent electrode members) and a temperature sensing region (extension portion outside the area between electrode members). This segmentation allows the temperature sensing element to be positioned on the extension portion, separating it from the high-current zone to eliminate Joule heat interference while maintaining integrated temperature monitoring capability.

The bus bar extension portion serves as an intermediary structure that connects the current conduction function (main bus bar body) with the temperature sensing function (extension portion). It acts as a thermal conductor to transfer battery temperature to the sensing element while being positioned outside the current flow path to minimize Joule heat generation, thus mediating between electrical connection and thermal measurement requirements.

The bus bar extension portion performs multiple functions simultaneously: it extends the electrical connection path for current conduction, provides a mechanically stable mounting platform for the temperature sensing element, and positions the sensing element outside the high-current zone to minimize Joule heat interference. This multi-functionality achieves accurate temperature sensing without adding separate structural components.

The temperature sensing structure is merged with the bus bar by integrating the sensing element directly onto the bus bar extension portion. This combination eliminates the need for separate temperature sensing structures and their associated mounting mechanisms, achieving accurate temperature measurement while minimizing structural complexity through functional integration.