The present disclosure relates to the technical field of battery, and discloses an integrated bus bar element for a battery, a battery and a vehicle; wherein the integrated bus bar element comprises a bus bar (20, 20a, 20b), and a plurality of branch bars (28a-28j) for electrical connection to battery cells (10, 10a, 10b) respectively, and the bus bar (20, 20a, 20b) and the branch bars (28a-28j) are made of a single conductor and integrally formed as a single piece. The integrated bus bar element of the present disclosure eliminates the connection points between the bus bar and the branch bars, a step of connecting the bus bar and the branch bars is not required to be implemented during the battery assembly, thus the reliability and assembly convenience of the battery are greatly improved.

A power supply apparatus includes a battery pack for a motor vehicle, and a power interface part that connects the battery pack and a plurality of electrical devices. The power interface part includes a battery-side connector, and a branch connector apparatus. The branch connector apparatus includes a joining part for connection lines, a fuse, a housing, and a connector. A guided part is provided on an outer side surface of the housing. The battery pack includes a slot part allowing the branch connector apparatus to be inserted and extracted. The battery-side connector is provided in the slot part. A guiding part extending along an insertion and extraction direction is provided on an inner side surface of the slot part. The guided part is guided along an extension direction of the guiding part by the guiding part.

The charge control circuit includes a cell connection detection circuit monitoring a voltage between input ports to which terminals of a cell pack are connected, an overvoltage detection circuit monitoring an overvoltage of the secondary cells, a first latch circuit receiving a signal output by the cell connection detection circuit, a second latch circuit receiving a signal output by the overvoltage detection circuit, a reset circuit outputting a signal to the first latch circuit and the second latch circuit when the charge control circuit is activated, and a control circuit receiving a signal output from the second latch circuit and outputting a signal for protecting the cell pack from the overvoltage. The control circuit does not output a signal for blowing the fuse until the first latch circuit receives a detection signal of the cell connection detection circuit.

The charge control circuit includes a cell connection detection circuit monitoring a voltage between input ports to which terminals of a cell pack are connected, an overvoltage detection circuit monitoring an overvoltage of the secondary cells, a first latch circuit receiving a signal output by the cell connection detection circuit, a second latch circuit receiving a signal output by the overvoltage detection circuit, a reset circuit outputting a signal to the first latch circuit and the second latch circuit when the charge control circuit is activated, and a control circuit receiving a signal output from the second latch circuit and outputting a signal for protecting the cell pack from the overvoltage. The control circuit does not output a signal for blowing the fuse until the first latch circuit receives a detection signal of the cell connection detection circuit.

A battery pack includes a housing, a cell group, an interface disposed on the housing so as to be connected to a charger or a power tool. The interface includes a first terminal electrically connected to a first electrode of the cell group, a second terminal electrically connected to the first electrode of the cell group, and a third terminal electrically connected to a second electrode of the cell group. The battery pack includes a first interrupt circuit disposed on a discharging loop, a second interrupt circuit disposed on a charging loop, and a control unit connected to the second interrupt circuit. The second interrupt circuit has an on state and an off stat. The control unit outputs, under a preset condition, a control signal to the second interrupt circuit such that the second interrupt circuit switches from the on state to the off state.

A battery pack includes a housing, a cell group, an interface disposed on the housing so as to be connected to a charger or a power tool. The interface includes a first terminal electrically connected to a first electrode of the cell group, a second terminal electrically connected to the first electrode of the cell group, and a third terminal electrically connected to a second electrode of the cell group. The battery pack includes a first interrupt circuit disposed on a discharging loop, a second interrupt circuit disposed on a charging loop, and a control unit connected to the second interrupt circuit. The second interrupt circuit has an on state and an off stat. The control unit outputs, under a preset condition, a control signal to the second interrupt circuit such that the second interrupt circuit switches from the on state to the off state.

A battery pack may include a fusible link plate having a bent shape. The fusible link plate may include: a first plate part extending in a first direction; a second plate part extending in a second direction; and a bent part connecting the first plate part to the second plate part. The first plate part, the second plate part, and the bent part may be disposed along a first plane that is along both the first direction and the second direction. The first plate part may include a portion having a first cross-sectional area. The second plate part may include a portion having a second cross-sectional area. The bent part may include a first fusible part having a third cross-sectional area. The third cross-sectional area may be smaller than the first cross-sectional area and smaller than the second cross-sectional area.

A battery pack may include a fusible link plate having a bent shape. The fusible link plate may include: a first plate part extending in a first direction; a second plate part extending in a second direction; and a bent part connecting the first plate part to the second plate part. The first plate part, the second plate part, and the bent part may be disposed along a first plane that is along both the first direction and the second direction. The first plate part may include a portion having a first cross-sectional area. The second plate part may include a portion having a second cross-sectional area. The bent part may include a first fusible part having a third cross-sectional area. The third cross-sectional area may be smaller than the first cross-sectional area and smaller than the second cross-sectional area.

A battery connector, including a flexible circuit including a first set of electrical circuitry connecting to a plurality of energy storage cells, where the first set of electrical circuitry terminates at a first connection point at the battery connector; a controller including components to control the energy storage cells connected to a second set of electrical circuitry terminating at a second connection point at the battery connector; where the first connection point and the second connection point are electrically connected.

A system for protecting a device having variable internal resistance includes a protection fuse capable of blowing when a current having an intensity greater than an intensity threshold passes through. The system also includes an estimator suitable for estimating the internal resistance of the device, and a safety device suitable for limiting and/or preventing use of the device when the internal resistance is greater than a resistance threshold beyond which the protection fuse is inoperative.