A battery cell has an electrical fuse. The electric fuse is a fusible link which is arranged on a terminal on an outside of a housing of the battery cell. The fusible link is covered by a polymer.

A battery cell has an electrical fuse. The electric fuse is a fusible link which is arranged on a terminal on an outside of a housing of the battery cell. The fusible link is covered by a polymer.

A battery pack includes a pack case accommodating a first battery module and a second battery module, and a busbar including a first body portion fastened to the first battery module, a second body portion fastened to the second battery module, and at least one breakable portion disposed between the first body portion and the second body portion and fused at a temperature lower than those of the first body portion and the second body portion. The busbar includes an insulating cover covering the first and second body portions and the breakable portion, and a flameproof cover covering the insulating cover. At least a portion of the insulating cover covering the breakable portion is exposed to the outside of the flameproof cover.

A battery pack includes a pack case accommodating a first battery module and a second battery module, and a busbar including a first body portion fastened to the first battery module, a second body portion fastened to the second battery module, and at least one breakable portion disposed between the first body portion and the second body portion and fused at a temperature lower than those of the first body portion and the second body portion. The busbar includes an insulating cover covering the first and second body portions and the breakable portion, and a flameproof cover covering the insulating cover. At least a portion of the insulating cover covering the breakable portion is exposed to the outside of the flameproof cover.

A battery cell may include an electrolyte, a first electrode including a first electrode layer and a first current collector, a second electrode including a second electrode layer and a second current collector, a separator interposed between the first electrode and the second electrode, and at least one protective layer. For example, a protective layer may be interposed between the first electrode layer and the first current collector, the second electrode layer and the second current collector, the separator and the first electrode, and/or the separator and the second electrode. When activated, the one or more protective layers may reduce or interrupt current flow through the battery cell. The composition of the one or more protective layers may include one or more small molecule additives to increase its stability and conductivity, thus improving the performance as well as the safety profile of the battery cell.

The present invention provides a battery, comprising a case, a cell packaged in the case, an electrical terminal located at one end of the case and electrically connected to the cell, a safety device and a current cut-off device. The safety device comprises a first and second electrode respectively electrically connected to a positive electrode or a negative electrode. The first electrode and the second electrode are arranged spaced apart from each other and form an electric field, and a gas generating material capable of generating an inert gas when a voltage reaches or exceeds a threshold value is provided in the electric field. The current cut-off device is electrically connected between the cell and the electrical terminal and is capable of causing a brake of circuit in response to a pressure difference between the inside and the outside of the battery caused by the inert gas.

The present invention provides a battery, comprising a case, a cell packaged in the case, an electrical terminal located at one end of the case and electrically connected to the cell, a safety device and a current cut-off device. The safety device comprises a first and second electrode respectively electrically connected to a positive electrode or a negative electrode. The first electrode and the second electrode are arranged spaced apart from each other and form an electric field, and a gas generating material capable of generating an inert gas when a voltage reaches or exceeds a threshold value is provided in the electric field. The current cut-off device is electrically connected between the cell and the electrical terminal and is capable of causing a brake of circuit in response to a pressure difference between the inside and the outside of the battery caused by the inert gas.

The present disclosure provides an external short-circuit protection apparatus for a lithium ion battery. The external short-circuit protection apparatus for the lithium ion battery includes at least one battery cell and a bus bar, wherein each battery cell is provided with a conductive tab, the conductive tab is adjacent to the bus bar, and under an action of external force, the bus bar and the conductive tab are in contact with or separated from each other to be electrically connected to or disconnected from each other. The bus bar is provided with an elastic bent portion, and under the action of a cover plate, an elastic bent portion of the bus bar and the conductive tab are in contact with or separated from each other to be electrically connected to or disconnected from each other.

The present disclosure provides an external short-circuit protection apparatus for a lithium ion battery. The external short-circuit protection apparatus for the lithium ion battery includes at least one battery cell and a bus bar, wherein each battery cell is provided with a conductive tab, the conductive tab is adjacent to the bus bar, and under an action of external force, the bus bar and the conductive tab are in contact with or separated from each other to be electrically connected to or disconnected from each other. The bus bar is provided with an elastic bent portion, and under the action of a cover plate, an elastic bent portion of the bus bar and the conductive tab are in contact with or separated from each other to be electrically connected to or disconnected from each other.

Systems and methods for operating a lithium-ion battery high-voltage distribution system architecture are disclosed. A battery pack includes: a plurality of lithium-ion battery cells; a disconnect mechanism operable in an operational position between a battery bus and the plurality of lithium-ion battery cells and a bypass position between the battery bus and a bus-power pass through; and a battery management system. The battery management system is eon figured to monitor battery pack performance, and responsive to detecting a triggering event in the battery pack performance, cause the disconnect mechanism to be in the bypass position.