So you've been tasked to design the monitor circuitry for a new battery-based power system. What strategies will you employ to optimize the design for cost and manufacturability? The initial considerations will be to determine the preferred structure of the system and the location of the cells and electronics involved. When the basic structure is understood, then one must consider the tradeoffs in the circuit topology such as, how to optimize communications and interconnection within the final product.
The form factor of the cells being considered will have a significant influence on the structure of the power system. Will there be a large number of small cells to fashion complex-shaped modules (or pack), or will large format units be used that impose weight limitations on cell count or other dimensional constraints? This is perhaps the biggest area of design flux, as new cell formats enter the market and efforts are made to more organically integrate the module or pack structures into an overall product concept. In the case of vehicle design, for example, batteries may well end up being distributed over the vehicle in otherwise inefficiently utilized spaces.
In addition, the topology of monitoring hardware is driven by the cell-count to be supported for a given mechanical concept. In a vehicular application, it is typical to see upwards of 100 total cell measurement points, and the modularization of the system will dictate how many cells are to be measured by a given electrical assembly.
For the complete article, including a scalable data acquisition solution, click here, courtesy of Automotive Designline Europe.