stuck on a certain part in the campaign (spoilers)

[ST21]

ok i am at the part where i need to break back into the steel mill(for the 2nd time) and find joker. there is one part after you use freezes ice thing to create lil floating pieces of ice to float down the water, where i need to throw my sonic batarang on a fuse box. i have hit this thing like 10 diff times and doesn't trigger the door to open. i don't understand. i have hit it at normal speed and even with the speed boost and nothing happens.

batman keeps saying " a batarang should provide the power needed to activate it" or something similar to that. but the batarang is doing nothing.

anyone passed this part that knows what to do please let me know because i am clearly doing something wrong.

[evolve]

You have to use the remote batarang, along with an electrical source. Find an electrical source then u guide the remote batarang into the electricity and then into the fuse box.

[Microshocky]

^ Like he said. There will be an electric current that you can see when you throw the batarang.