A battery, characterized by comprising: a case; a cell, the cell being packaged in the case; an electrical terminal, the electrical terminal being located at one end of the case and electrically connected to the cell; a safety device, the safety device comprising: a first electrode, wherein the first electrode is electrically connected to one of a positive electrode and a negative electrode of the cell; a second electrode, wherein the second electrode is electrically connected to the other one of the positive electrode and the negative electrode, the first electrode and the second electrode are arranged spaced apart from each other, and an electric field is formed between the first electrode and the second electrode; and a gas generating material, wherein the gas generating material is provided in the electric field and capable of generating an inert gas when a voltage in the electric field reaches or exceeds a predetermined threshold value; and a current cut-off device, the current cut-off device being electrically connected between the cell and the electrical terminal and capable of causing a brake of circuit in response to a pressure difference between the inside of the battery and an external environment caused by the inert gas generated by the safety device. a case; a cell, the cell being packaged in the case; an electrical terminal, the electrical terminal being located at one end of the case and electrically connected to the cell; a safety device, the safety device comprising: a first electrode, wherein the first electrode is electrically connected to one of a positive electrode and a negative electrode of the cell; a second electrode, wherein the second electrode is electrically connected to the other one of the positive electrode and the negative electrode, the first electrode and the second electrode are arranged spaced apart from each other, and an electric field is formed between the first electrode and the second electrode; and a gas generating material, wherein the gas generating material is provided in the electric field and capable of generating an inert gas when a voltage in the electric field reaches or exceeds a predetermined threshold value; and a current cut-off device, the current cut-off device being electrically connected between the cell and the electrical terminal and capable of causing a brake of circuit in response to a pressure difference between the inside of the battery and an external environment caused by the inert gas generated by the safety device. a first electrode, wherein the first electrode is electrically connected to one of a positive electrode and a negative electrode of the cell; a second electrode, wherein the second electrode is electrically connected to the other one of the positive electrode and the negative electrode, the first electrode and the second electrode are arranged spaced apart from each other, and an electric field is formed between the first electrode and the second electrode; and a gas generating material, wherein the gas generating material is provided in the electric field and capable of generating an inert gas when a voltage in the electric field reaches or exceeds a predetermined threshold value; and a current cut-off device, the current cut-off device being electrically connected between the cell and the electrical terminal and capable of causing a brake of circuit in response to a pressure difference between the inside of the battery and an external environment caused by the inert gas generated by the safety device.