A battery pack (11) in which a cell stack (15) having a plurality of rectangular cells (14) stacked is housed in an interior of a battery case (12) includes an end plate (20) disposed on one end side in a stacking direction of the cell stack (15), a wedge member (19) disposed on the side of the end plate (20) opposite to the cell stack (15), and a bolt (18) disposed in a bolt screw-in direction that is orthogonal to the stacking direction and urging the wedge member (19) toward a bottom wall (12c) of the battery case (12), and first abutment faces (19b, 20a) via which the wedge member (19) and the end plate (20) abut against each other are formed from an inclined face that is inclined toward the bolt (18) side in the bolt screw-in direction. Therefore, it is possible to apply strong compression to the cell stack (15) with a simple structure and to suppress expansion of the rectangular cell (14), and moreover to enhance the energy density per unit volume while reducing the dimensions and weight of the battery pack (11).

A battery pack (11) in which a cell stack (15) having a plurality of rectangular cells (14) stacked is housed in an interior of a battery case (12) includes an end plate (20) disposed on one end side in a stacking direction of the cell stack (15), a wedge member (19) disposed on the side of the end plate (20) opposite to the cell stack (15), and a bolt (18) disposed in a bolt screw-in direction that is orthogonal to the stacking direction and urging the wedge member (19) toward a bottom wall (12c) of the battery case (12), and first abutment faces (19b, 20a) via which the wedge member (19) and the end plate (20) abut against each other are formed from an inclined face that is inclined toward the bolt (18) side in the bolt screw-in direction. Therefore, it is possible to apply strong compression to the cell stack (15) with a simple structure and to suppress expansion of the rectangular cell (14), and moreover to enhance the energy density per unit volume while reducing the dimensions and weight of the battery pack (11).

A battery and an electronic device are disclosed. The battery includes: a first bare cell portion and a second bare cell portion. The first bare cell portion has a first surface and a side surface connected to the first surface, the first surface is configured to face towards a same direction as that of an opening of a battery compartment of an electronic device when the battery is installed in the battery compartment, and the side face is configured to face towards an inner side surface of the battery compartment of the electronic device when the battery is installed in the battery compartment. The second bare cell portion is located on a side that the first surface faces, and an orthographic projection of the second bare cell portion on the first surface overlaps the first surface.

A battery module includes a case and a connection terminal including at least one pair of a positive electrode terminal and a negative electrode terminal disposed at a middle part of each of opposite side surfaces of the case. Each of the positive electrode terminal and the negative electrode terminal protrudes outwards. The positive electrode terminal, a gap between the positive electrode terminal and the negative electrode terminal, and the negative electrode terminal are disposed at equal intervals based on the center of the case.

A traction battery assembly includes, among other things, a battery cell array having a plurality of individual battery cells. The battery cell array usable with a first busbar module having a first arrangement of busbars. The battery cell array is also usable with a second busbar module having a second arrangement of busbars. When the battery cell array is used with the first busbar module, the battery cell array is partitioned into a first number of groups of battery cells in parallel with each other. When the battery cell array is used with the second busbar module, the battery cell array is partitioned into a different, second number of groups of battery cells in parallel with each other.

A traction battery assembly includes, among other things, a battery cell array having a plurality of individual battery cells. The battery cell array usable with a first busbar module having a first arrangement of busbars. The battery cell array is also usable with a second busbar module having a second arrangement of busbars. When the battery cell array is used with the first busbar module, the battery cell array is partitioned into a first number of groups of battery cells in parallel with each other. When the battery cell array is used with the second busbar module, the battery cell array is partitioned into a different, second number of groups of battery cells in parallel with each other.

This charger 1 is provided with: a battery housing unit 2 including a first contact T1 and a second contact T2 which touch the respective electrode terminals of a battery BAT to be housed therein; a high-potential power supply line 3 and a low-potential power supply line 4 to which power for charging the battery BAT is supplied; a connection switching circuit 5 capable of switching between a first connection state in which the first contact T1 is connected to the high-potential power supply line 3 and the second contact T2 is connected to the low-potential power supply line 4 and a second connection state in which the second contact T2 is connected to the high-potential power supply line 3 and the first contact T1 is connected to the low-potential power supply line 4; and a control device 7 for controlling the connection switching circuit 5 to perform charging control on the battery BAT. The control device 7 performs preliminary charging on the battery BAT in the first connection state and, when a battery voltage V.sub.B does not exceed a set voltage V.sub.S, switches the connection state to the second connection state and performs preliminary and normal charging on the battery BAT.

A failed battery cell handling method, a battery module, a battery pack, and a device, which relates to the technical field of energy devices. The handling method includes: injecting a conductive material into a failed battery cell, where the conductive material is in a molten state when being injected, and is in a solid state after cooling, and the conductive material is configured to electrically connect a positive terminal and a negative terminal of the failed battery cell.

A battery module unit including a plurality of sequentially stacked first brackets and a plurality of battery cells. Each first bracket includes a bracket body. A first battery cell group and second battery cell group disposed the opposite side of the first bracket. A connecting structure is disposed at one end of a plurality of the bracket bodies. A fastener is disposed on the first fixing bracket and is fixed to a sidewall of the connecting structure to fix the connecting structure to the first fixing bracket in a stacking direction. The first battery cell group is symmetric to the second battery cell group around a symmetric central axis of the first fixing bracket or around a symmetric central axis of a plurality of the first fixing brackets.

A battery system includes a plurality of battery cell packs arranged in layers selectively connected in series and parallel by a control system controlling a plurality of switches. Each of the battery cell packs includes a plurality of battery cells. A plurality of first switches and a plurality of second switches are controlled by a control system to connect the battery cell packs in response to a desired current output of the battery system and/or a desired voltage output of the battery system irrespective of individual battery cell or battery cell pack voltages or currents associated with state of charge or operational performance. The control system controls the switches to selectively connect the battery cell pack(s) to the output connections in parallel and/or series to provide redundancy and reduce output voltage/current fluctuation otherwise associated with state of charge or underperforming battery cells/packs.