A circuit board and a battery connection module are provided. The circuit board has an insulating substrate and a plurality of circuit traces provided thereto. At least one of the traces is provided with a fuse unit. The fuse unit has a main fuse and at least one spare fuse. The main fuse has two main trace connection end portions respectively positioned at two ends of the main fuse and connected to the trace and a main fuse section connected between the two main trace connection end portions. The spare fuse has two trace connection end portions respectively positioned at two ends of the spare fuse and a fuse section connected between the two trace connection end portions, the fuse section and the main fuse section are spaced apart from each other and arranged side by side, and at least one of the two trace connection end portions is not connected with the trace so as to form an electrical disconnection with the trace, and after the main fuse section forms an electrical disconnection, the two trace connection end portions are connected to the trace so that a current conductive path is formed by the spare fuse and the trace.

A fusing apparatus including a main connection member provided on a main path and having one side and the other side electrically connected to the main path, respectively, a sub connection member provided on a sub path and having one side and the other side electrically connected to the sub path, respectively, and a shifting member provided between the main connection member and the sub connection member and configured to be moved and coupled from the main connection member to sub connection member to shift a connection relation from a connected state of the main connection member to a connected state of the sub connection member.

A battery pack includes at least one battery cell; a protection circuit module electrically connected to the at least one battery cell; and a thermocompression bonding layer, the thermocompression bonding layer providing a disconnectable electrical connection between an electrode tab of the at least one battery cell and a connection tab of the protection circuit module, wherein the thermocompression bonding layer includes conductive particles and an insulating composite resin layer, the insulating composite resin layer surrounds the conductive particles, and the insulating composite resin layer includes at least one first resin layer and at least one second resin layer, the at least one first resin layer being different from the at least one second resin layer.

A charge-discharge control circuit, method, device and a storage medium are provided. In some embodiments, the circuit includes: a starting power supply; and a main positive switch unit. In those embodiments, a first terminal of the main positive switch unit is connected to the starting power supply, and a second terminal of the main positive switch unit is connected to a generator of the vehicle and a load of the vehicle. The main positive switch unit is configured to interrupt a current in a first current direction, which is a current direction when the generator charges the starting power supply. The circuit also includes a battery management module configured to detect a voltage of the starting power supply, and control the main positive switch unit to interrupt the current in the first current direction when the voltage of the starting power supply reaches a preset voltage threshold.

An external short-circuit device is disclosed. The external short-circuit device includes a first extension electrode and a second extension electrode respectively connected to both electrode tabs of a battery cell, a short-circuit unit including a case that accommodates an end portion of the first extension electrode and an end portion of the second extension electrode, and a heating unit coupled to the short-circuit unit. The short-circuit unit further includes a contact module between the first extension electrode and the second extension electrode. When the heating unit provides a heat to at least one of the first extension electrode or the second extension electrode, the contact module melts to bring the first extension electrode into contact with the second extension electrode.

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.

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 method for manufacturing a crosslinked polyolefin separator and a separator are provided. The method includes putting a polyolefin and a polyolefin elastomer into an extruder first, and putting an alkoxy silane containing a carbon-carbon double bond functional group, an initiator and a crosslinking catalyst to form the separator. The crosslinked polyolefin separator has high meltdown temperature and low shutdown temperature.

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 module includes a case, a plurality of battery cells accommodated in the case, and a first busbar connecting at least one of the plurality of battery cells to a conductive connector, wherein the first busbar includes a first connection portion connected to the at least one battery cell, a second connection portion connected to the conductive connector, and a first linking portion connecting the first connection portion and the second connection portion to each other, wherein the first linking portion includes a material having a melting point lower than that of the first connection portion or the second connection portion.