A battery cell may include an electrolyte, a first electrode including a first electrode layer and a first current collector, a second electrode including a second electrode layer and a second current collector, a separator interposed between the first electrode and the second electrode, and at least one protective layer. For example, a protective layer may be interposed between the first electrode layer and the first current collector, the second electrode layer and the second current collector, the separator and the first electrode, and/or the separator and the second electrode. When activated, the one or more protective layers may reduce or interrupt current flow through the battery cell. The composition of the one or more protective layers may include one or more small molecule additives to increase its stability and conductivity, thus improving the performance as well as the safety profile of the battery cell.

A battery cell may include an electrolyte, a first electrode including a first electrode layer and a first current collector, a second electrode including a second electrode layer and a second current collector, a separator interposed between the first electrode and the second electrode, and at least one protective layer. For example, a protective layer may be interposed between the first electrode layer and the first current collector, the second electrode layer and the second current collector, the separator and the first electrode, and/or the separator and the second electrode. When activated, the one or more protective layers may reduce or interrupt current flow through the battery cell. The composition of the one or more protective layers may include one or more small molecule additives to increase its stability and conductivity, thus improving the performance as well as the safety profile of the battery cell.

A ballistic resistant case for a secondary battery having a rectangular metal case (160) with a panel (160p) connected to the bottom wall and the side walls to divide the internal space of the case into cell pack receiving bays (160b). A bus bar (170) extends from the front wall, across the top of the panel, to the rear wall. A connector (162, 170f, 180a) secures the cover (180) to the panel (160p) with the bus bar (170) sandwiched therebetween. The bus bar (170) reinforces a central portion of the cover (180) and prevents the panel (160p) and the walls from deflecting to provide ballistic protection for the cell packs (24).

An electrochemical apparatus including an electrode assembly including a first electrode plate, a second electrode plate and a separator disposed between the first electrode plate and the second electrode plate. The first electrode plate includes a current collector and an active material layer, the current collector includes a first zone and a second zone, the second zone is provided with an active material layer, the first zone includes a third zone and a fourth zone, the third zone is arranged in overlap with the separator, and the fourth zone is provided with a conductive layer. The conductive layer is disposed in a zone of the current collector that has no active material layer disposed thereon and that does not overlap the separator.

An electrochemical apparatus including an electrode assembly including a first electrode plate, a second electrode plate and a separator disposed between the first electrode plate and the second electrode plate. The first electrode plate includes a current collector and an active material layer, the current collector includes a first zone and a second zone, the second zone is provided with an active material layer, the first zone includes a third zone and a fourth zone, the third zone is arranged in overlap with the separator, and the fourth zone is provided with a conductive layer. The conductive layer is disposed in a zone of the current collector that has no active material layer disposed thereon and that does not overlap the separator.

A battery cell, a battery, an electrical device, and a method and device for manufacturing the battery cell. In some embodiments, the battery cell comprises a battery core, a shell, an end cover, and a first insulating component. The battery core comprises a main body part and electrode tabs protruding from the main body part. The shell has a first opening and is configured to accommodate the battery core. The end cover is configured to cover the first opening. The first insulating component comprises an insulating main body and an insulating part, wherein the insulating main body is located on a side, facing the electrode tabs, of the end cover, and the insulating main body is configured to isolate the battery core from the end cover.

An insulated connection system for connecting a first busbar and a second busbar to at least a first connector and a second connector. The second busbar including a bar orifice to connect the first connector to the first busbar. The insulated connection system including an electrically insulating casing defining: a first recess portion for accommodating a first connecting portion of the first busbar, a second recess portion for accommodating a second connecting portion of the second busbar, and a sleeve portion for accommodating a portion of the second busbar provided with the bar orifice. The insulated connection system further including a busbar positioning assurance (BPA) member of electrically insulating material configured to accommodate a portion of the first connector and to be received in the connector passage and the bar orifice.

A battery apparatus includes a casing and at least one first insert disposed on the casing. The first inserts has an electromagnetic shielding layer. The battery apparatus further includes at least one second insert disposed on the casing. The first insert and the second insert are arranged at intervals. The electromagnetic shielding layer of the first insert is electrically connected to the casing through the second insert.

Disclosed are a battery, a battery module, a battery pack, and an electric vehicle. The battery includes a housing and at least two electrode core sets connected in series with each other and each including at least one electrode core (4). The electrode core (4) includes a positive plate, a negative plate, and an electrolyte located between the positive plate and the negative plate. The electrolyte is a solid electrolyte or a polymer electrolyte. Isolation layers (43) are arranged between opposite surfaces of two adjacent electrode core sets. Each isolation layer (43) is formed by curing an insulation adhesive coated on at least one of the opposite surfaces of the two adjacent electrode core sets.

Disclosed are a battery, a battery module, a battery pack, and an electric vehicle. The battery includes a housing and at least two electrode core sets connected in series with each other and each including at least one electrode core (4). The electrode core (4) includes a positive plate, a negative plate, and an electrolyte located between the positive plate and the negative plate. The electrolyte is a solid electrolyte or a polymer electrolyte. Isolation layers (43) are arranged between opposite surfaces of two adjacent electrode core sets. Each isolation layer (43) is formed by curing an insulation adhesive coated on at least one of the opposite surfaces of the two adjacent electrode core sets.