A protective device for shutting down at least one battery cell in a battery system of a motor vehicle in case of an electrical short circuit. The protective device is configured to conduct an electric current, which flows through the at least one battery cell, through a measurement element, in which the current generates an electrical measurement voltage in dependence on its amperage and/or its amperage gradient. The measurement element is coupled to an analog monitoring circuit, in which a comparison unit is configured to trigger a triggering signal for the case that the amperage rises at least by a predetermined delta value within a predetermined duration, and a switching unit is configured to receive the triggering signal and to interrupt the current upon receiving the triggering signal by switching at least one switching element.

A battery protector includes analog frontend circuitry coupled to a hibernate mode input terminal that is one of configured to couple to a high voltage connector terminal when the system is connected to an external load or charger to define an active mode and configured to float when the system is disconnected from the external load or charger to define a hibernate mode. The analog frontend circuitry is configured to provide a signal at an output thereof to distinguish, in the absence of an external ground connection, between connected and floating conditions for the hibernate mode input terminal. Digital logic is coupled with the output of the analog frontend circuitry, the digital logic providing a digital signal to control whether the battery protector is operating in the active mode or the hibernate mode based on the signal at the output of the analog frontend circuitry.

A battery module having first and second cylindrical battery cells, each of the first and second cylindrical battery cells having a negative electrode terminal and a positive electrode terminal, a metal plate configured to connect, in series, the first cylindrical battery cell and the second cylindrical battery cell, a shrinkable tube in which the first and second cylindrical battery cells are mounted, first and second PTC elements respectively provided to the first and second cylindrical battery cells, first insulating members provided between the first and second PTC elements and the shrinkable tube, second insulating members respectively provided between the first and second PTC elements and the first and second cylindrical battery cells, insulating sheets respectively configured to seal an upper surface and a lower surface of the shrinkable tube, and a connection part protruding outward from the shrinkable tube and configured to connect the first and second cylindrical battery cells to an external electronic apparatus in provided.

An embodiment is directed to a contact plate arrangement for a battery module. In an aspect, the contact plate arrangement includes a busbar configured to transport current between first and second parallel groups of battery cells (P-Groups) in series, and a bonding connector attached to a sidewall of the busbar and configured to form an electrical connection with a cell terminal of a battery cell from a respective one of the first and second P-Groups.

A first connector for electrically connecting a first unit power terminal through a third unit power terminal to a power converter for performing conversion between a DC power and an AC power is mounted to a mounting port. In a status in which the first connector is being removed from the mounting port, it is impossible to mount the first connector to the mounting port while the first unit power terminal through the third unit power terminal are inputting and outputting a DC power, and it is possible to mount the first connector to the mounting port while the first unit power terminal through the third unit power terminal are not inputting and outputting a DC power.

Various embodiments of the present invention relate to a secondary battery. The technical problem to be solved is to provide a secondary battery having an embossed safety vent, which is not damaged by an external force generated during a manufacturing process, can clearly define a rupture area or shape, and makes process management for rupture area or shape easy. To this end, various embodiments of the present invention disclose a secondary battery comprising: a case, a cap plate which is installed in the case and has a vent hole; and a safety vent which is coupled to the vent hole of the cap plate and ruptures when the internal pressure of the case is greater than a reference pressure, wherein the safety vent comprises an embossed portion; and a notch portion formed in the embossed portion.

A cell for an electrical energy store is provided, including a cell housing within which there is arranged an electrode and on the outer side of which there is arranged a terminal which is galvanically connected to the electrode, wherein an electrical securing element is connected in a current path between the terminal and the electrode for the purposes of galvanic separation of the electrode and of the terminal. The cell is characterized by having the securing element arranged outside the cell housing. In this way, it is possible in a simple manner for the state of charge of the cell to be checked, and also for the cell to be discharged, from the outside.

Fabricating the electrode blank includes baking a blank precursor. The blank precursor contains the components of an electrode active medium including an active material. Fabricating the electrode blank also includes performing one or more post-bake calender operations on the blank precursor after baking the blank precursor. Each post-bake calender operation includes calendering the blank precursor.

A battery control system, comprising: a number of battery components used for storing electric energy and supplying power for a load; a number of switch units connected to a number of battery components to form a charge/discharge branch and used for turning on or off the charge/discharge branch where the battery components are located; and a first control unit connected to a number of switch units separately and used for receiving a charge control signal to control the on/off of a number of switch units so that a number of switch units is connected in series to form a serial charge branch, and used for receiving a discharge control signal to control the on/off of a number of switch units so that a number of battery components is connected in parallel to form a parallel discharge branch.

A system for explosively applying a fire-fighting foam is provided. The system includes a thermoelectric generator that is attached to a battery heat source. A temperature differential across the thermoelectric generator generates an electrical current having a temperature-dependent voltage. A detonator circuit is electrically connected to the thermoelectric generator. The detonator circuit measures the voltage of the electrical current. An explosive foam applicator is communicatively connected to the detonator circuit and includes a trigger mechanism that detonates a propelling charge in response to receiving a signal from the detonator circuit when the detonator circuit determines that the electrical current corresponds to temperature that is greater than or equal to a threshold temperature. The explosive foam applicator is oriented such that detonating the propelling the charge causes the explosive foam applicator to apply a foam to the battery heat source.