Welcome to Android Central! All devices need a battery. In order to open the device, search YouTube for "[your Kocaso model] replace battery." Since Kocaso devices aren't very common, you might not be able to find any.
But it's probably not the battery. If the device is freezing at the logo and just staying like that, then it's more likely a problem with the firmware or the motherboard, which is not surprising for budget devices like this one. There may not be much you can do. Try contacting Kocaso:
Welcome to KOCASO