A circuit board soldering structure includes lead a plate inserted into a slit hole of a circuit board and soldered to a conductive pattern provided along the slit hole. The lead plate is made of an elastically-deformable metal plate thinner than an opening width (W) of slit hole. The lead plate includes insertion section inserted into the slit hole. The insertion section includes a bent section approaching from one of opposing inner surfaces of the slit hole facing each other toward another of the opposing inner surfaces of the slit hole. The bent section is disposed in the slit hole. The insertion section has both surfaces that are close to or contact corresponding opposing inner surfaces of the slit hole to solder the insertion section to the conductive pattern.

A bus bar, which includes a metal bar made of an electrically conductive metal material; a bandage member configured to surround the metal bar except for both ends of the metal bar; and an insulating tube configured to surround the metal bar and the bandage member together, wherein the bandage member is made of a metal wire having a surface coated with a coating material having insulation and fire resistance.

A bus bar, which includes a metal bar made of an electrically conductive metal material; a bandage member configured to surround the metal bar except for both ends of the metal bar; and an insulating tube configured to surround the metal bar and the bandage member together, wherein the bandage member is made of a metal wire having a surface coated with a coating material having insulation and fire resistance.

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.

An HV busbar configured to connect a plurality of battery modules to each other, has a conductor including a first metal plate and a second metal plate and an insulative resin coating layer on the outer circumferential surface of the conductor, wherein a first metal constituting the first metal plate and second metals having a lower melting temperature than the first metal are mixed in the second metal plate in the state in which the second metals are dispersed.

An HV busbar configured to connect a plurality of battery modules to each other, has a conductor including a first metal plate and a second metal plate and an insulative resin coating layer on the outer circumferential surface of the conductor, wherein a first metal constituting the first metal plate and second metals having a lower melting temperature than the first metal are mixed in the second metal plate in the state in which the second metals are dispersed.

A cell module includes a plurality of battery cells each having a safety valve at a first end in a height direction, a first current collector plate including a main body having a through hole that at least partly overlaps the safety valve when viewed along the height direction and a lead extending into the through hole from the main body and being electrically connected to a first terminal of each of the battery cells, an exhaust duct disposed over a surface of the first current collector plate remote from the battery cells, and an insulating film being made of an insulating material and covering an area of the first current collector plate facing the exhaust duct. The safety valve opens when an internal pressure of any of the battery cells reaches or exceeds a predetermined level.

The invention relates to an electrically and thermally connecting device (3) for batteries and pieces of electrical distribution equipment of an aircraft, comprising a casing (5) containing a plurality of bare under-voltage parts (7), said connecting device (3) being intended to make contact with a portion of the casing (5) and at least one bare under-voltage part (7), said connecting device (3) furthermore comprising: at least one base (11) that is made from a thermally conductive material and that is intended to be fastened to the portion of the casing (5); at least one head (13) that comprises a springback connector and that is intended to make contact with the bare under-voltage parts (7) and the portion of the casing (5); and an intermediate element (15) that is intended to electrically connect the bare parts (7), said element (15) being clamped between a base (11) and a head (13). The invention also relates to a battery and to a piece of electrical distribution equipment for an aircraft.

Provided is a laser welding apparatus configured to weld an electrode lead of at least one secondary battery of a battery module and a main bus bar configured to electrically connect a plurality of secondary batteries to each other. The laser welding apparatus includes: a laser beam emitting unit including a laser emitting element to irradiate a laser beam to the electrode lead and the main bus bar; a pressing jig including a pressing bar configured to move in a left-and-right direction such that the electrode lead is adhered to the main bus bar; and a blocking block movable to block the laser beam generated in the laser beam emitting unit from reaching the at least one secondary battery or movable to allow the generated laser beam to pass therethrough, according to a position of the pressing bar moved in the left-and-right direction.

Disclosed in the present disclosure are a welding-free connector electrically connected to a battery cell, and a lithium ion battery comprising the connector. The connector comprises current collector bars, the current collector bars being clamped with a connecting plate; the connecting plate comprises a back plate and clamping posts fixedly provided at one side of the back plate at intervals, and grooves for clamping with the current collector bars are formed between adjacent clamping posts; a thermal decomposition material layer is coated on the periphery of the clamping posts or the inner side walls of the grooves, and the thermal decomposition material layer is formed by compounding a thermosensitive resin and a modified material; and the back plate and the clamping posts are both made of a high-thermal-conductivity insulating material.