Awake mind after meditation
But when I try to concentrate more during meditation, my mind becomes charged...

If what you are describing here is concentrate with more effort (rather than meditating for a longer duration) then what you have described is a common symptom of concentrating with too much power &amp; effort. 

While beginner meditators often meditate with mental force to counter (suppress) discursive (habitual) thinking, ultimately, Buddhist meditation is based on letting go &amp; emptying the mind (rather than pushing the mind with power &amp; effort).