Abstract: A method for controlling a temperature of a battery cell (22, 24) in a battery module (20), the method comprising the steps of: determining an initial temperature of the battery cell (22, 24); measuring a current (I) flowing into or out of the battery cell (22, 24); determining an actual temperature gradient of the battery cell (22, 24) using a thermal battery cell model described by a differential equation, for which input values comprise at least the determined initial temperature and the measured current (I); comparing the determined actual temperature gradient of the battery cell (22, 24) with a pre-defined desired temperature gradient; and automatically adjusting the current (I) flowing into or out of the battery cell (22, 24) according to a result of the comparison.

Abstract: Detection of corrosion within an at least partially electrically conductive housing of an electric energy storage unit. The electric energy storage unit has a positive terminal and a resistance element between the positive terminal and the housing. State of charge values of the electric energy storage unit for at least one first instant of time and at least one second instant of time are determined. An electrical isolation resistance value between the housing of the electric energy storage unit and at least one reference point for at least one third instant of time may also be determined. A first comparison of a difference of the determined state of charge values with a predefined state of charge difference value for the electric energy storage unit and/or a second comparison of the determined electrical isolation resistance value with a predefined electrical isolation resistance value for the electric energy storage unit are performed.

Abstract: A method for monitoring a state of at least one predetermined battery cell of a battery having a number of series-connected or series-connectable battery cells. In one example, the method includes placing the battery, during a first phase, into a first state in which the battery cells in each case have a predefined charging state, discharging the battery, which is in the first state, during a second phase following the first phase, charging the battery during a third phase, following the second phase, up to a point in time at which at least one battery cell of the battery has the predefined charging state, detecting the voltage provided by the at least one predetermined battery cell at least temporarily, and determining information for detecting the state of the at least one predetermined battery cell by evaluating the detected voltage.

Abstract: To realize the stabilization of an energy storage device while forming a current collector per se in a compact shape. An energy storage device 10 includes a terminal (negative electrode terminal 300), an electrode assembly 400 having a body portion 430 and tab portions 420 projecting from the body portion 430, and a current collector (negative electrode current collector 150) electrically connecting the terminal and the tab portions 420 with each other. The current collector is configured such that a first plate portion 1521 and a second plate portion 522 which opposedly face each other are continuously formed with each other with a curved portion 1513 interposed therebetween. A thickness t of the curved portion 1513 is set smaller than a thickness t2 of the first plate portion 1521 and a thickness t2 of the second plate portion 1522.

Abstract: A battery cell (BZ), in particular a lithium-ion battery cell, wherein the battery cell (BZ) has a number of contact sensor elements (S) for detecting elements (N) which bear on the contact sensor elements (S) or apply pressure to the contact sensor elements (S), wherein the contact sensor elements (S) are electrically insulated from one another.

Abstract: An energy storage device includes a current collector (negative electrode current collector), an insulating member (lower insulating member) that abuts on the current collector, an electrode assembly, and a leading plate (negative electrode leading plate) that connects the electrode assembly and the current collector. The leading plate includes an engaging unit (notch) that engages the insulating member or the current collector, and the insulating member or the current collector includes an engaged unit (projection) that the engaging unit of the leading plate engages.

Abstract: An energy storage device includes: an electrode assembly; a case configured to store the electrode assembly; a conductive member electrically connected to the electrode assembly; a first insulating member disposed between a wall of the case and the conductive member; and a projection protrudingly provided on the wall on an opposite side to the first insulating member, wherein the first insulating member has a first engaging portion configured to engage with a limiting portion, the limiting portion being a portion of a recess formed on the wall on an opposite side to the projection.

Abstract: A battery cell (10) with two battery cell terminals (11, 12) which are contactable from inside and/or outside the battery cell (10), and an electrochemical part (20) comprising at least one separator. Upon the achievement of a predefined temperature, the at least one separator is at least partially impermeable to ions which can be generated in the electrochemical part (20). The battery cell (10) has a rapid discharge unit (30), which is connectable between the battery cell terminals (11, 12) and which, in a switched-in and consequently activated state, has a predefined resistance value. The predefined resistance value is selected such that, with the rapid discharge unit (30) switched-in, the at least one separator achieves the predefined temperature.