A battery interconnect may include a desired current capacity, integrated fusible links, and be manufacturable using cost effective techniques. In some embodiments, a battery interconnect includes a busbar and relatively thinner links. A busbar carries larger currents and accordingly its cross-sectional areas are relatively larger to reduce ohmic losses. A link carries a much smaller current, and a fusible link is configured to break the circuit when the current is above a threshold, thus requiring a relatively small cross-sectional area. These sometime disparate length scales are addressed using several techniques such as layering a busbar and a foil sheet and pressing portions of a busbar to form the links. The links can be affixed to a plurality of battery cells to connect the cells in parallel or series.

A battery box includes at least two end plates, at least two side plates, and a plurality of welding members. One of the at least two end plates is provided between two adjacent side plates of the at least two side plates. The at least two end plates and the at least two side plates are connected to one another to enclose a cavity of the battery box. The plurality of welding members are formed by bending an end portion of an end plate of the at least two end plates multiple times. The end portion of the end plate is configured to implement the connection of at least two side plates and the at least two end plates to one another to enclose the cavity of the battery box. The plurality of welding members are configured to be welded to a corresponding side plate.

To provide a conductive carbon material dispersing agent for a lithium ion battery, a slurry for a lithium ion battery electrode, an electrode for a lithium ion battery, and a lithium ion battery The disclosure provides a conductive carbon material dispersing agent for a lithium ion battery including a water-soluble poly(meth)acrylamide (A-1) which contains 2 to 60 mol % of structural units derived from a (meth)acrylamide group-containing compound (a) and 10 to 70 mol % of structural units derived from an unsaturated sulfonic acid or salts thereof (b), and which has a weight average molecular weight of 10,000 to 300,000.

This application provides a battery module including a first battery sequence, a second battery sequence, a first output electrode component, a second output electrode component, and a busbar assembly. The first batteries include a first electrode terminal, and the second batteries include a second electrode terminal. The busbar assembly includes first, second, and third busbar components. The first busbar component is connected to the first electrode terminal, the second busbar component is connected to the second electrode terminal, and the third busbar component connects the first electrode terminal and the second electrode terminal. The first output electrode component is connected to the first electrode terminal. The second output electrode component is connected to the second electrode terminal. The first battery connected to the first output electrode component and the second battery connected to the second output electrode component are located at the same end of the battery module.

A difference voltmeter (DVM) is used in a battery testing apparatus for determining values of open-circuit voltage, self-discharge, self-discharge rate and internal resistance of batteries. A reference voltage Vref is generated. A difference OCV relative to Vref is determined at times t1 and t2 as ΔOCV1 and ΔOCV2. The SD for a battery is determined as (ΔOCV2−ΔOCV1), and the SDR is determined as SD/(t2−t1). The IR of a battery is determined by measuring voltage at two levels of direct current and calculating IR as equal to (ΔV2−ΔV1)/(I2−I1). The smaller FSR of the DVM allows a more accurate measurement of OCV, which allows the time for determining the SDR to be reduced.

This application provides a battery cell. The battery cell may include: a housing including a wall portion; an electrode terminal insulatively mounted on the wall portion; an electrode assembly disposed in the housing, where the electrode assembly may include a body and a first tab, and the first tab may be formed at an end of the body closer to the wall portion; a current collector disposed between the electrode assembly and the wall portion, where the current collector may be configured to connect the first tab and the electrode terminal; and a heat shrink film, where at least a part of the heat shrink film may cover a side of the current collector facing toward the wall portion to insulate the current collector from the wall portion.

A battery box has front and rear walls and first and second sidewalls defining an interior of the battery box. A first guideway is provided on a surface of the first sidewall that faces the interior. A second guideway is provided on a surface of the second sidewall that faces the interior. The first and second guideways extend in the height direction. A first spacer is configured to move in the height direction along the first guideway, and a second spacer is configured to move in the height direction along the second guideway. The first and second guideways and/or the first and second spacers have an angled surface so that as the first and second spacers are moved downwardly in the height direction along the respective first and second guideways, a gap defined in the length direction between the first and second spacers is narrowed.

A laminated body pressing apparatus, which can restrain damage of a first outer ridge portion or a second outer ridge portion of a positive electrode plate during roller-pressing and can restrain damage of a strip-shaped first separator of a strip-shaped negative electrode body on a positive electrode plate side, includes a first press roller, a second press roller disposed parallel to the first press roller and spaced apart from the first press roller by a roller gap, and a metal plate feeding unit to feed a strip-shaped metal plate extending in a conveyance direction to the roller gap. The apparatus roller-presses the positive electrode plate and the strip-shaped negative electrode body by the first press roller and the second press roller in a state where the strip-shaped metal plate fed by the metal plate feeding unit is placed on the positive electrode plate placed on the strip-shaped negative electrode body.

A pouch cell includes a generally rectangular cell housing formed of a metal laminated film that includes a box portion and a lid portion that is formed separately from the box portion. The active material including the electrode and an electrolyte is placed into the box portion and the lid portion is welded to the box portion. The box portion and the lid portion are formed and assembled together without using a drawing or a punching process. Instead, the pouch cell housing is formed via a series of folding and welding steps, whereby the pouch cell size is not limited by the draw depth of the metal laminated film.

The present disclosure relates to an electric tool and a power supply method for an electric tool. The electric tool includes: a housing; a motor, accommodated in the housing; battery pack mounting portions, at least two battery packs being detachably mounted in the battery pack mounting portions; a main switch, being in an open state or a closed state according to an operation of a user, when the main switch is in a closed state, the battery packs are capable of supplying power to the motor, and when the main switch is in an open state, the battery packs stop supplying power to the motor; and a control assembly, detecting a state of the main switch, when the main switch is in an open state, the control assembly controls transfer of electric energy of a battery pack with a high voltage to a battery pack with a low voltage of the at least two battery packs.