US Patent 7807285 Battery connection structure and method

An energy storage device, such as an electrical storage battery, having a unique terminal structure and sealing arrangement. The battery generally includes a case in which an electrode assembly is disposed, and a cover provided with a fill hole and fill plug, and a terminal structure that forms a battery terminal. Both the positive and negative electrode tabs are compressed by a fastener that seals the battery and forms a battery terminal. The battery case can be positive, negative, or neutral.