A battery pack includes a plurality of battery cells; and a bus bar electrically connected to the plurality of battery cells, wherein the bus bar includes a single-layer portion and a multi-layer portion, the multilayer portion having different numbers of stacks in the thickness direction, the single-layer portion includes a first material layer, and the multi-layer portion includes a first material layer continuously connected from the first material layer of the single-layer portion and a second material layer on at least one of a front surface or a rear surface of the first material layer.

A battery pack includes a plurality of battery cells; and a bus bar electrically connected to the plurality of battery cells, wherein the bus bar includes a single-layer portion and a multi-layer portion, the multilayer portion having different numbers of stacks in the thickness direction, the single-layer portion includes a first material layer, and the multi-layer portion includes a first material layer continuously connected from the first material layer of the single-layer portion and a second material layer on at least one of a front surface or a rear surface of the first material layer.

A sensing system for a battery includes a flex foil substrate including a first cover layer. A conductive layer defines a trace pattern including traces. A second cover layer defines a first opening. The conductive layer is sandwiched between the first cover layer and the second cover layer. The first opening exposes a first trace and a second trace of the trace pattern. A busbar is attached to the first cover layer of the flex foil substrate. A temperature sensor is connected to the first trace and the second trace of the trace pattern in the first opening of the first cover layer.

The disclosure provides a battery pack and a battery cell. The battery pack includes a plurality of battery cells, wherein two adjacent battery cells in the plurality of battery cells are connected to each other by a conductive adhesive layer, and each battery cell includes a cathode collector, a cathode layer, a separator, an anode layer and an anode collector which are stacked in a thickness direction; and the plurality of battery cells are sequentially stacked in the thickness direction to form the battery pack, and the battery pack is able to form a current channel in the thickness direction when charged or discharged; wherein the conductive adhesive layer is provided with two opposite main surfaces, one main surface being connected to the cathode collector of one battery cell, and the other main surface being connected to the anode collector of the other battery cell.

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.

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.

An electric battery (20) comprises a multiplicity of individual cells (21). The battery (20) has at least one temperature measurement device (10). The temperature measurement device (10) comprises a multilayer circuit board (1) as carrier element, having an upper conductive layer (1a) and a lower conductive layer (1b), a multiplicity of temperature sensors (2) that are each configured to generate a temperature-dependent measured signal, and a multipole terminal (11) for reading the measured signals. Each of the multiplicity of temperature sensors (2) is in each case arranged on a first insulated region (5a) of the upper conductive layer (1a). The lower conductive layer (1b) has, for each temperature sensor (2), a second insulated region (5b) as thermal contact surface. Each first insulated region (5a) is thermally conductively connected to a corresponding second insulated region (5b), in each case via at least one through-connection (4). The second insulated regions (5b) are each in thermally conductive contact with at least one cell connector (22) of the battery (20).

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.