A method of detecting a leakage of a coolant in a battery cooling device for a vehicle includes: receiving, by a controller, a first pressure value from a first pressure sensor configured to detect a pressure in a coolant pipe; and determining, by the controller, whether the coolant leaks in the coolant pipe based on the first pressure value.

A method of detecting a leakage of a coolant in a battery cooling device for a vehicle includes: receiving, by a controller, a first pressure value from a first pressure sensor configured to detect a pressure in a coolant pipe; and determining, by the controller, whether the coolant leaks in the coolant pipe based on the first pressure value.

The present invention relates to an eddy current sensor for deriving an eddy current and sensing the derived eddy current in order to detect a crack in a battery cell, the eddy current sensor comprising: a core unit in which a coil is wound around a magnetic member; and a case for accommodating the core unit of which there are at least two, and which are respectively arranged so that the central axis of the coil is oriented in the thickness direction of the battery cell. The eddy current sensor of the present invention enables one-point sensing, thereby improving crack detection capability without a non-inspection area while having high detection resolution.

An inspection device of a film-type battery is provided which can detect a poorly sealed site of a heat seal part. The present disclosure provides an inspection device of a film-type battery including an electrode body, and a film exterior body for accommodating the electrode body in the inside thereof, and having a heat seal part at the periphery thereof. The inspection device includes a temperature measuring device for measuring the temperature distribution of the heat seal part, and a first determination part for controlling the temperature measuring device in a prescribed time after forming the heat seal part at the film exterior body, and determining the presence or absence of a poorly sealed site based on the temperature distribution measured.

A detection system includes a power generation element; a first outer cover body enveloping the power generation element; a second outer cover body located between the power generation element and the first outer cover body, and enveloping the power generation element; a first space section enclosed by the first outer cover body and the second outer cover body; a second space section enclosed by the second outer cover body; and a detector that detects a gas in the first space section.

A method for a tightness test of a test object filled with a liquid, said test object having an internal pressure which is lower than atmospheric pressure, comprising the following steps: inserting the test object into a test chamber, evacuating the test chamber to a pressure which is lower than the internal pressure inside the test object, drawing off the test chamber residual gas components together with gas components desorbing from a wall of the test chamber and parts of the liquid escaping from the test object through a leak in the latter without any carrier gas being fed to the test chamber from outside, transporting the drawn-off residual gas components together with the parts of the liquid escaped from the test object to a detector, and detecting parts of the liquid escaped through a leak in the test object by means of a detector.

A fluid leakage detection system includes: a measurement unit configured to detect leakage of working oil in a hydraulic cylinder; and a controller configured to acquire a measurement result from the measurement unit, wherein the controller diagnoses that a battery depletion has been caused in a battery in a case in which it is determined that a data from the measurement unit has not been acquired and it is determined that the battery of the measurement unit has been in a low-remaining-battery-level state, and the controller diagnoses that a communication abnormality has been caused in a first communication part of the measurement unit in a case in which it is determined that the data from the measurement unit has not been acquired and it is determined that the battery has not been in the low-remaining-battery-level state.

In some examples, a method for forming an energy storage device assembly, e.g., for an implantable medical device, may comprise partially enclosing electrodes of an energy storage device within a foil pack, wherein the foil pack includes an unsealed portion and a sealed portion when partially enclosing the electrodes of the energy storage device. The method may further comprise forming a first heat seal at the unsealed portion of the foil pack, and subsequently forming a second heat seal that is redundant with the first heat seal of the foil pack.

An apparatus having a foil pack defining a device enclosure and a fluid conduit defining a fluid channel. The device enclosure may be configured to hold an energy storage device such as a battery or capacitor. The fluid conduit defines a fluid channel configured to allow a flow from the device enclosure through a test port defined by the fluid conduit. The apparatus is configured to establish a vacuum in the device enclosure when a vacuum is established in the fluid channel (e.g., during leak testing of the device enclosure). A scaffolding within the fluid conduit is configured to configured to resist a collapse of the fluid channel when the vacuum is established in the fluid channel.

Leak testing system (100) and method for leak testing a finished battery cell, comprising a vacuum chamber (4), a vacuum pump (6), a detecting and measuring system (1) to detect gases and/or vapors escaping from the cell, the gases and/or vapors deriving from parts and/or substances inside in the cell, and a capillary element (2) which connects the detecting and measuring system to the vacuum chamber and through which the gases and/or vapors leaking from the cell flow. The system further comprises heating devices adapted to heat at least one of the components of system, thereby making the system substantially memory-free.