A cell contacting system for an electrochemical device is provided, which includes a plurality of cell groups having one or more electrochemical cells, each having a first and a second cell terminal. The first cell terminals follow each other along the longitudinal direction in a first cell terminal region of the electrochemical device and the second cell terminals follow each other along the longitudinal direction in a second cell terminal region of the electrochemical device. The cell contacting system includes at least one cell connector extending obliquely to the longitudinal direction and configured for electrically conductively connecting cell terminals of a first cell group in the first cell terminal region to cell terminals of a second cell group in the second cell terminal region, which cell contacting system reliably enables a relative movement between the cell terminals to be electrically connected to each other.

A battery and straps for a battery are disclosed. The battery according to various embodiments comprises a number of straps which connect a number of battery cells in series. The battery straps may pass through cutouts provided in a cell divider wall. The cutouts and straps may define a common headspace. The battery may have five connecting straps and two end straps.

Methods of forming a controllable resistive element include forming source and drain regions in a substrate. A battery stack is formed on a substrate between the source and drain regions. Respective anode and cathode electrical connections are formed to the battery stack. Respective source and drain electrical connections are formed.

Provided is a battery cell assembly that continues to operate near normal parameters following a fault in a cell. The battery cell assembly includes a plurality of repeating cell units. Each of the cell units is connected in parallel with another cell unit. Additionally, each of the cell units is connected in series with another cell unit. Each of the cell units includes n cells connected in series, the n cells having a voltage range tolerance of z % greater than a nominal operational voltage range. The n cells comprise a first end cell, a second end cell, and n−2 middle cells interposed between the first end cell and the second end cell. The middle cells are absent a parallel connection. In each of the cell units, n≥3 and z(n−1)≥100. Also provided is a method of compensating for a voltage loss from a shorted cell.

Provided is a battery cell assembly that continues to operate near normal parameters following a fault in a cell. The battery cell assembly includes a plurality of repeating cell units. Each of the cell units is connected in parallel with another cell unit. Additionally, each of the cell units is connected in series with another cell unit. Each of the cell units includes n cells connected in series, the n cells having a voltage range tolerance of z % greater than a nominal operational voltage range. The n cells comprise a first end cell, a second end cell, and n−2 middle cells interposed between the first end cell and the second end cell. The middle cells are absent a parallel connection. In each of the cell units, n≥3 and z(n−1)≥100. Also provided is a method of compensating for a voltage loss from a shorted cell.

A busbar connector (60) for making one or more electrical connections within or to a battery module (M) of a battery pack, the battery module (M) comprising one or more battery cells, wherein the busbar connector (60) comprises: a base portion (160) for forming an electrical connection to one or more of the battery cells within the module; and at least one connector portion (180, 190) for forming an electrical connection from the base portion (160) to one or more other components of the module or the battery pack; wherein at least one or more of the following (i) to (iv) is satisfied: (i) the at least one connector portion (180, 190) has a non-uniform transverse cross-sectional area passing therealong, or (ii) the at least one connector portion (180, 190) has a lateral width which varies passing therealong, or (iii) the base portion (160) has a longitudinal length, the base portion (160) and the at least one connector portion (180, 190) are united or joined via an attachment portion, and the attachment portion has a length dimension, in the same direction as the longitudinal length of the base portion (160), which is greater than the lateral width of the at least one connector portion (180, 190) at locations therealong spaced or distal from the attachment portion, or (iv) the base portion (160) has a longitudinal length, and the at least one connector portion (180, 190) extends transversely from a lateral side of the base portion (160), and further extends in a general length direction (L) thereof which lies at an angle relative to the longitudinal length direction of the base portion (160), wherein the said angle lies in the range of from greater than 0 or 2 or 5 or 10 or 15 or 20 or 25° up to 30 or 40 or 50 or 60 or 70 or 80 or 90° relative to the longitudinal length direction of the base portion (160).

A battery module disposed in a battery pack includes a plurality of flat plate batteries that are stacked; a connection member having a connection member main body that has a plate-shape and disposed in parallel with the flat plate batteries in a stacking direction of the flat plate batteries; and insulation members disposed on side surfaces of the connection member main body in the stacking direction of the flat plate batteries. The connection member has two terminals, a first terminal of the two terminals is connected to a terminal of the flat plate batteries, and a second terminal is connected to a terminal of an adjacent battery module.

A connection module can be attached to an electricity storage element group in which a plurality of electricity storage elements each including a positive and a negative electrode terminal are aligned, the connection module including: a bus bar including a pair of terminal connection portions that are to be respectively connected to the electrode terminals of the adjacent electricity storage elements; and an insulating protector that is to be fixed to the electricity storage element group, wherein the insulating protector includes an accommodation frame inside of which the bus bar is disposed; and retaining portions that prevent the bus bar from coming off in the left-right direction inside the accommodation frame, and a tolerance absorbing clearance is provided between each of the retaining portions and the bus bar.

The present invention relates to a battery cell that can include an electrode assembly configured with two or more unit stacks connected to each other in series or in parallel, a battery case configured to receive the electrode assembly therein, and an insulative protection member configured to protect an electrode tab portion of the unit stacks. The overall length of the battery case can be three or more times the overall width of the battery case. A positive electrode lead and a negative electrode lead can extend outwards from the battery case protruding in opposite directions. A plurality of unit stacks can be used to implement a long battery cell, and a connection portion at which the plurality of unit stacks are connected is reinforced to improve safety of the battery cell.

The present disclosure provides a large pouch module and an electric vehicle including the same. The large pouch module includes a plurality of core modules and a housing accommodating the core modules; each of the core modules includes a plurality of core assemblies connected in series, and the plurality of core assemblies are folded in an M-folding manner to form the core module; a plurality of partition plates are vertically arranged inside the housing to partition an interior of the housing into a plurality of spaces. The large pouch module of the present disclosure can be used as the battery of the electric vehicle, which has a low cost, an excellent performance, safety and reliability, and wide application fields.