Battery holder system and battery including battery terminal-cover

The present invention relates to a battery holder system and a battery including a battery terminal cover. According to an embodiment of the present invention, the battery comprises one or more battery cells, a battery management system, and a battery terminal unit. The battery terminal unit comprises: a terminal block which contains a first opening and an internal region extended from the first opening; a terminal set which includes at least one signal terminal and at least one power terminal, and is arranged in the internal region of the terminal block; a terminal cover which has multiple slits corresponding to the position of the arranged terminal set, and covers the first opening of the terminal block; and an elastic member which is arranged in the internal region of the terminal block, and provides an elastic force to the outside direction of the terminal block in order to keep the terminal cover on the surface of the first opening. When the battery is mounted in the battery holder system, the terminal set can be exposed by allowing an external force to be applied to the terminal cover. According to an embodiment of the present invention, the battery holder system comprises: a first battery accommodating part which includes a first inner side wall, a first inner plane, and a first terminal block formed on the first inner plane and having a first accommodating terminal set, and accommodates a first battery; a second battery accommodating part which includes a second inner side wall, a second inner plane, and a second terminal block formed on the second inner plane and having a second accommodating terminal set, and accommodates a second battery; and an interconnection part which electrically connects the first accommodating terminal set and the second accommodating terminal set in parallel.