An electric vehicle includes an electric drive component; a lithium titanate oxide battery pack comprising LTO battery cells; and a range extender. The range extender has a first state to deliver power to the electric drive component, a second state to charge the LTO battery pack, a third state to deliver power to the electric drive component and charge the LTO battery pack, and a fourth state in which it does not deliver power outward. The electric drive component has a first state to receive power delivered from the LTO battery pack, a second state to receive power delivered from the range extender, a third state to receiver power delivered from the LTO battery pack and the range extender, a fourth state to recover braking energy to charge the LTO battery pack, and a fifth state in which it does not receive power and does not recover the braking energy.

A battery pack, including a cell assembly including a plurality of secondary batteries and having outer protrusions formed at an outer side surface thereof to extend vertically and a pack housing configured to have an inner space in which the cell assembly is accommodated, the pack housing having inner protrusions formed at an inner side surface thereof to extend vertically, wherein the cell assembly has ducts provided at both side surfaces thereof so that fluid flows into or out of a secondary battery, and the outer protrusions are formed at outer side surfaces of the ducts.

A battery module includes a number of battery cells, which are connected to each other at connection poles. The battery cells have respective hard shell housings, in which at least one bus bar extends. A number of wound and/or stacked battery cells is electrically contacted by the at least one bus bar.

A vehicle body member includes a first cell portion including a first negative pole portion and a first positive pole portion disposed to be in contact with a surface of the first negative pole portion, a second cell portion including a second negative pole portion and a second positive pole portion disposed to be in contact with a surface of the second negative pole portion, an insulating layer disposed between the first cell portion and the second cell portion, a positive pole current collector connecting the first positive pole portion of the first cell portion and the second positive pole portion of the second cell portion in parallel, and a negative pole current collector connecting the first negative pole portion of the first cell portion and the second negative pole portion of the second cell portion in parallel.

A vehicle body member includes a first cell portion including a first negative pole portion and a first positive pole portion, with one or more first via holes penetrating the first negative pole portion and the first positive pole portion, a second cell portion including a second negative pole portion and a second positive pole portion, an insulating layer disposed between a surface of the first cell portion and a surface of the second cell portion, the insulating layer having one or more insulating via holes, a series connector connecting the first negative pole portion and the second positive pole portion in series via the first via holes and the insulating via holes, a positive pole current collector connected to the first positive pole portion, and a negative pole current collector connected to the second negative pole portion.

A vehicle body member includes a first cell portion including a first negative pole portion and a first positive pole portion disposed to be in contact with a surface of the first negative pole portion, a second cell portion including a second negative pole portion and a second positive pole portion disposed to be in contact with a surface of the second negative pole portion, an insulating layer disposed between the first cell portion and the second cell portion, a series connector connecting the first negative pole portion of the first cell portion and the second positive pole portion of the second cell portion in series, a positive pole current collector connected to the first positive pole portion of the first cell portion, and a negative pole current collector connected to the second negative pole portion of the second cell portion.

A battery case includes a first cell accommodating portion that accommodates a first number of battery cells, and a second cell accommodating portion that accommodates a second number of battery cells, smaller than the first number. The second cell accommodating portion is shorter than the first cell accommodating portion in one of three directions parallel to sides of the battery case. The battery case further includes a board accommodating portion, which is adjacent to the second cell accommodating portion in the one of the three directions, and that accommodates a circuit board therein; a first partition wall arranged between the first cell accommodating portion and the board accommodating portion; and a second partition wall arranged between the second cell accommodating portion and the board accommodating portion. Thus, the thickness of the battery is reduced and the circuit board is separated from the battery cells.

A storage battery container is provided with an air supply part having an air supply port provided to the bottom surface, a variable heat dissipation device that balances accumulated heat inside the storage battery, and an air discharge part of a rear surface having an air discharge port correspondingly provided to a heat release part of the variable heat dissipation device. The air supply part puts the air supply port in an open state when power is being supplied, and puts the air supply port in a closed state when the power supply stops. The air discharge part puts the air discharge port in an open state when the variable heat dissipation device is actuated, and puts the air discharge port in a closed state when the actuation of the variable heat dissipation device stops.

A battery information processing system includes an analyzer configured to analyze a result of measurement of an AC impedance of a module M. The analyzer plots the result of measurement of the AC impedance on a first frequency characteristic diagram which is a Bode diagram (a first diagram) relating to a real number component of the AC impedance and on a second frequency characteristic diagram which is a Bode diagram (a second diagram) relating to an imaginary number component of the AC impedance, obtains a polynomial curve L1 by fitting processing onto a result of plotting on the first diagram and obtains a polynomial curve L2 by fitting processing onto a result of plotting on the second diagram, and converts the polynomial curves L1 and L2 into an impedance curve Z on a Nyquist diagram.

A battery power supply (1) for an industrial truck (8) used in a potentially explosive area is provided, having a housing (2) having a housing body (47) and a lid (4), wherein the housing body (47) has a receiving chamber (48) for receiving a battery tray (3) that has an inner chamber (20) having a traction battery (25) arranged therein, and the lid (4) is releasably placed on the housing body (47) using securing means (53), and the battery tray (3) has a battery tray lid (49) and a base (26) having walls (17, 18) extending away from the base (26), wherein, in a region adjacent to the base (26), at least one wall (17, 18) has a recess (19) penetrating the wall (17, 18) into the inner chamber (20).