The present disclosure provides a multifunctional high-voltage connector and a battery product, the multifunctional high-voltage connector comprises: an upper cover; a pedestal; a conductive connection structure; two mating terminals; and a harness assembly. The conductive connection structure is used to make the two mating terminals be connected in series, and the harness assembly is directly connected to one of the mating terminals. When the upper cover and the pedestal are assembled, the conductive connection structure is simultaneously in contact with the two mating terminals, thereby turning on the high-voltage circuit. When the battery product requires maintenance, the upper cover is directly detached from the base, thereby turning off the high-voltage circuit. The battery product can be electrically connected to an external device via the harness assembly. The multifunctional high-voltage connector integrates both a switch function and a high-voltage connection function, therefore the connection resistance is greatly reduced.

Provided herein are modular fuse holders for single bolt fuses. In some approaches, a fuse holder may include a base having a lower wall and a set of sidewalls, the lower wall including a plurality of bolt openings provided therethrough. The fuse holder may further include a cover securable with the base, the cover including an upper wall and a set of outer walls, the outer walls including a plurality of cable openings, wherein the base and the cover define an interior cavity for housing a bolt assembly. In some approaches, the fuse holder may include a busbar atop the lower wall of the base, the busbar including a set of openings aligned with one or more of the bolt openings of the lower wall. In some embodiments, a side cover may extend over some of the plurality of cable openings in the outer wall of the cover.

Provided herein are modular fuse holders for single bolt fuses. In some approaches, a fuse holder may include a base having a lower wall and a set of sidewalls, the lower wall including a plurality of bolt openings provided therethrough. The fuse holder may further include a cover securable with the base, the cover including an upper wall and a set of outer walls, the outer walls including a plurality of cable openings, wherein the base and the cover define an interior cavity for housing a bolt assembly. In some approaches, the fuse holder may include a busbar atop the lower wall of the base, the busbar including a set of openings aligned with one or more of the bolt openings of the lower wall. In some embodiments, a side cover may extend over some of the plurality of cable openings in the outer wall of the cover.

A circuit protection assembly includes a mounting block, a unitary fuse assembly, a post assembly and a plug connector. The unitary fuse assembly is disposed the mounting block and includes a plurality of fuses each of which is defined by a portion of a bus plate disposed on the lower surface of the mounting block to form a first terminal of the fuse, a second terminal disposed at least partially on the upper surface of the mounting block and a fuse element connecting the first terminal and the second terminal. The post assembly is disposed at least partially within the mounting block and a post extending from the block. The plug connector extends from a portion of the first terminal of at least one of the plurality of fuses.

The present disclosure provides an overvoltage and overcurrent protection circuit and a mobile terminal. The overvoltage and overcurrent protection circuit comprises a primary protection circuit and a secondary protection circuit. The primary protection circuit comprises a power end coupled to an anode of a cell, a detection end coupled to a cathode of the cell, and a low potential interface end coupled to a ground end of a charging and discharging interface. The secondary protection circuit comprises a high potential cell end, a low potential cell end, and a high potential interface end, in which the high potential cell end is externally coupled to the anode of the cell, the low potential cell end is externally coupled to the cathode of the cell, and the high potential interface end is externally coupled to a power end of the charging and discharging interface.

Devices and systems are provided that incorporate fusible links within the electrical traces of a battery module voltage sensing circuit. The fusible links can be integrally formed in an electric trace and provide an overcurrent protection feature for the circuit without requiring fuse elements or components that are separate from the electrical trace. Each of these fusible links include a substantially flat controlled cross-sectional area disposed along a length of the material making up the electrical trace. In an overcurrent situation, the connection between a battery management system and a battery cell may be severed by the overcurrent melting the fusible link. The electrical traces may be spaced apart from one another in the circuit such that an overcurrent situation breaking the connection between one cell and the battery management system would not affect adjacent electrical traces not having an overcurrent situation.

A battery connection unit includes an electronic component electrically connected to a battery terminal and a terminal of an electric wire, and an insulating support member that includes a first support body and a second support body and that supports the electronic component, where the first support body is disposed across a space in such a way that a first gap to a first surface becomes a first reference gap, the second support body is disposed across a space in such a way that a second gap to a second surface becomes a second reference gap, at least one first spring member that contacts the first surface while maintaining the first reference gap after attachment to the battery is disposed on the first support body, and at least one second spring member that contacts the second surface while maintaining the second reference gap is disposed on the second support body.

The present disclosure provides an overvoltage and overcurrent protection circuit and a mobile terminal. The overvoltage and overcurrent protection circuit comprises a primary protection circuit and a secondary protection circuit. The primary protection circuit comprises a power end coupled to an anode of a cell, a detection end coupled to a cathode of the cell, and a low potential interface end coupled to a ground end of a charging and discharging interface. The secondary protection circuit comprises a high potential cell end, a low potential cell end, and a high potential interface end, in which the high potential cell end is externally coupled to the anode of the cell, the low potential cell end is externally coupled to the cathode of the cell, and the high potential interface end is externally coupled to a power end of the charging and discharging interface.

Provided herein is a fuse assembly including an anti-rotation device. In some embodiments, the fuse assembly may include a fusible device connected to a conductive component, wherein the conductive component is operable to connect to a terminal of a power source and a securement device coupled to the fusible device. The securement device may include a body including a recess operable to receive the fusible device and a support post extending from the body, wherein the support post is operable to engage the power source to reduce rotation of the securement device and the fusible device relative to the power source.

A battery cell has an electrical fuse that is a safety fuse having a groove or an opening. An expansion material is arranged in the groove or the opening and has a higher coefficient of thermal expansion than the material of the safety fuse.