Contactor box and a battery for an energy storage system of an electrical vehicle

A contactor box for an electrical energy storage system of an at least partly electrical vehicle, the contactor box comprising:

• a contactor, a Battery Monitoring Unit (BMU), a fuse, a sensor and a Direct Current to Direct Current (DCDC) converter of the electrical energy storage system, wherein the contactor box is arranged to electrically connect and disconnect a battery and a power-consuming component of the vehicle;
• a first ingoing high voltage connection adapted to mate with a corresponding high voltage output connection of the battery;
• and
• a first outgoing high voltage connection adapted to mate with a high voltage input connection of the power-consuming component of the vehicle;
• wherein the first ingoing high voltage connection and the first outgoing high voltage connection are positioned on a same side of the contactor box, and are physically separated from each other within the contactor box;
• wherein the first ingoing high voltage connection and the first outgoing high voltage connection are adapted to be disengaged from the battery when the contactor box is removed from the vehicle, and adapted to be engaged with the battery and the power-consuming component when the contactor box is inserted into the vehicle.