It appears you're keen to gain deeper insights into the specific blocks within a Simulink model.
The first one is a Simulink "constant" block which is having the value of MaxCellVoltage which is likely retrieved from the MATLAB workspace.
The second one is a "Sum" block , You can easily customize the operation (addition or subtraction) by double-clicking the block and adjusting the signs to meet your requirements.
The third block is essentially a Simulink subsystem, which allows for modular design by grouping a set of blocks together. To delve into the specifics of this subsystem, you can click on the "downward arrow" to expand and view its contents, provided you have access to the Simulink model.
To know more about these blocks, you can refer to following MathWorks documentation
Constant Bock :https://in.mathworks.com/help/simulink/slref/constant.html
