Conductive power rod for electrochemical cell

An electrochemical energy storage device comprising:

• an electrode assembly (7.2) comprising:
• a separator (7.1) separating a positive electrode (6) and a negative electrode (9), wherein the separator (7.1), the positive electrode (6) and the negative electrode (9) are radially coiled about a central axis (7.3) forming a central void (7.4);
• a positive electrode current collector (5) in electrical contact with the positive electrode (6);
• a negative electrode current collector (10) in electrical contact with the negative electrode (9);
• and
• a conductive power rod (12) comprised of a cable and disposed in the central void (7.4), the conductive power rod (12) providing structural support to prevent the collapse of the central void (7.4) and either:
• a. in electrical contact with the positive electrode current collector (5) and providing an electrical connection with a positive terminal (5.1);
• or
• b. in electrical contact with the negative electrode current collector (10) and providing an electrical connection with a negative terminal (10.1);
• wherein the positive terminal (5.1) is electrically isolated from the negative terminal (10.1);
• a can housing (8) enclosing the electrode assembly (7.2), the positive electrode current collector (5), the negative electrode current collector (10) and the conductive power rod (12), and further comprises an end (4) and a second end (4.1), and wherein the conductive power rod (12) is connected to the end (4) and second end (4.1) such that the rod (12) provides structural support to the can housing (8) to prevent deflection of the end (4) and the second end (4.1) when the device experiences above-normal operating internal pressure.