A battery pack including heterogeneous secondary batteries includes: a first battery set in which a plurality of first secondary batteries are stacked; and a second battery set in which a plurality of second secondary batteries are stacked, in which each of the first battery set and the second battery set is formed of a plurality, and the battery pack has an arrangement structure in which the plurality of first battery sets and the plurality of second battery sets are alternately stacked in one direction.

The invention relates to a cell coil (30, 40, 50, 60, 100, 200) for a lithium-ion battery, comprising at least two sub-cells (10, 32, 42, 44, 52, 54, 68, 70, 80, 82), which are wound in a space-saving manner and are thermally coupled to each other. According to the invention, the at least two sub-cells (10, 32, 42, 44, 52, 54, 68, 70, 80, 82) are electrically connected in parallel in normal operation, and, in the event of a fault, in particular in the event of an internal short circuit in at least one defective sub-cell (10, 32, 42, 44, 52, 54, 68, 70, 80, 82), at least one defective sub-cell (10, 32, 42, 44, 52, 54, 68, 70, 80, 82) can be electrically separated from the at least one intact sub-cell (10, 32, 42, 44, 52, 54, 68, 70, 80, 82). Because of the at least one defective sub-cell (10, 32, 42, 44, 52, 54, 68, 70, 80, 82) that can be immediately electrically separated from the intact sub-cells (10, 32, 42, 44, 52, 54, 68, 70, 80, 82) by means of an electronic monitoring device (36) in the “event of a fault”, a high level of robustness of the cell coil (30, 40, 50, 60, 100, 200) in respect of internal short circuits is achieved. Among other things, the intact sub-cells (10, 32, 42, 44, 52, 54, 68, 70, 80, 82) act, because of the thermal coupling between the sub-cells (10, 32, 42, 44, 52, 54, 68, 70, 80, 82), as a damage-reducing heat sink for the waste heat that is released during the fast discharge of the affected defective sub-cell (10, 32, 42, 44, 52, 54, 68, 70, 80, 82) generally occurring in the event of a short circuit.

A battery pack which has cell units in which top-side and bottom-side battery cells are connected in series, and is capable of switching the connection state of the cell units, wherein a control unit monitors voltage imbalances between the plurality of cell units, and also monitors whether or not a cell unit contact failure has occurred. In order to stop a charging/discharging when a contact failure occurs, a signal (abnormality stoppage signal or charging stoppage signal) for stopping discharge is produced and outputted to the electrical device body-side.

Provided is a pouch type secondary battery including a jelly roll in which a plurality of unit cells including a structure of a separator interposed between a positive electrode and a negative electrode are laminated, wherein a unit cell positioned in an outermost layer of the jelly roll includes a carbon dioxide adsorbent.

Bidirectional electrical power systems are provided that include versatile battery packs. For example, a battery pack is introduced which may have both a first interface or port for high voltage fast charging and discharging, and a second interface or port for low voltage supply of power to present equipment without requiring modification or retrofitting. The battery pack may include, for example, a first battery module within the battery pack; a second battery module within the battery pack; and a switching matrix within the battery pack and configured to connect the first and second battery modules in series or in parallel.

In a battery cell connection structure for connecting two rectangular battery cells in series in a state where the two battery cells are stacked in the thickness direction thereof, a positive electrode tab of one of the battery cells and a negative electrode tab of the other of the battery cells are connected to each other in a state where the positive electrode tab and the negative electrode tab are stacked in the thickness direction while the positive electrode tab and the negative electrode tab are inclined with respect to a direction in which the two battery cells are stacked.

An auxiliary electrode includes a conductive layer having a first major surface in an X-Y plane, the conductive layer is electrically conductive and has a first surface area. The auxiliary electrode includes a first carrier ion supply layer and a second carrier ion supply layer, each carrier ion supply layer comprising a material that supplies carrier ions for an electrode of the secondary battery. The first carrier ion supply layer covers a first region of the first major surface of the conductive layer and the second carrier ion supply layer covers a second region of the first major surface of the conductive layer. The first and second regions are separated by a third region, the third region configured to be folded such that the first region and the second region are substantially parallel, and the third region is substantially perpendicular to the first and second regions in the folded configuration.

A pre-lithiation module for a lithium containing secondary battery includes a switched capacitor circuit, a pre-lithiation module controller connected to the switched capacitor circuit, a battery connector for electrical connection to an electrode busbar and a counter-electrode busbar of the lithium containing secondary battery, and a pre-lithiation connector for electrical connection to an auxiliary electrode of the lithium containing secondary battery. The pre-lithiation module controller includes a processor and a memory. The memory of the pre-lithiation module controller stores instructions that program the pre-lithiation module controller to operate the switched capacitor circuit to selectively conduct a current through the auxiliary electrode to diffuse lithium to electrode active material layers of the lithium containing secondary battery.

The present invention relates to an electrode assembly. The electrode comprises: a plurality of unit electrodes formed by connecting a plurality of electrodes made of an electrode mixture having a solid shape to each other; a separator interposed between the plurality of unit electrodes; and an electrode tab attached to the unit electrode, wherein the electrode tab comprises first and second electrode tabs, which are respectively attached to the unit electrodes and have different specific resistance.

A method for managing the electrical energy passing through a metal-air battery comprising a cell and the associated cell comprising a negative electrode, a first positive electrode referred to as the air electrode, and a second positive electrode referred to as the power electrode. The cell further comprises a third positive electrode. In a first charging phase, a charging voltage is applied to the cell, this voltage causing current to travel between the negative electrode and the second positive electrode, the first and third positive electrodes being electrically inactive. In a second charging phase, the charging voltage causes current to travel between the negative electrode and said third positive electrode, the first and second positive electrode being electrically inactive.