Hi now i did see the funds in my BCH account, but they are only viewable, not spendable, what can i do to make them fully mine ?
It sounds like you have imported only the address (which only lets you view the coins), as opposed to importing the private key (which will let you spend the coins.
Using Electrum, open up your BTC wallet with the address you accidentally sent your BCH to. Go to the "Addresses" tab, and right click on the address you sent the BCH to. Click on "Private key", enter your password if you have one, and copy the private key which is displayed. Open Electrum Cash, create a new wallet, and import that private key. You should see the same address, but this time with your BCH balance which will be spendable.