274results about "Cell/batteries leak testing" patented technology

An apparatus for making a hermetic device containing a detectable gas and comprising a surface having a fill port comprising a vacuum pump in communication with the hermetic device through a vacuum conduit; a liquid reservoir for containing liquid to be delivered to the hermetic-device; a gas reservoir for containing a detectable gas to be delivered to the hermetic device; a transfer vessel for transferring a selected quantity of liquid and gas to the hermetic device; and a block for passing the selected quantity of liquid and gas through a fill port of the hermetic device, and disposing a seal into the fill port. A method for making a hermetic device containing a detectable gas, and an exemplary hermetic device comprising an electrochemical cell or a capacitor are also disclosed.

A leak detection system for a flowing electrolyte battery comprising a containment member associated with at least one of a stack of a flowing electrolyte battery and an electrolyte reservoir of a flowing electrolyte battery and a sensing member for sensing a fluid leak within the containment member.

In an electrochemical cell in which a container is bonded to a cap, observation of liquid leakage has been needed in directions from four sides of the container, therefore much time and high cost have been required. The outer circumference of the cap is made to be smaller than that of the container, whereby surfaces for observing liquid leakage can be made to be only one surface in a direction from an upside of the cap, consequently an electrochemical cell can be provided at low cost.

The invention relates to the field of lithium ion secondary batteries, specifically relates to a microcapsule and a positive electrode material for a battery as well as preparation methods and application of the microcapsule and the positive electrode material. The microcapsule comprises 30-100 parts by weight of a core part and 10-110 parts by weight of a shell part, wherein the core part comprises a reducing substance and/or a flame retardant compound, the shell part is a macromolecule substance, the particle size of the microcapsule is 0.01-20 mum; the positive electrode material is prepared by blending and compounding the microcapsule and the basis positive electrode material. In a situation that internal temperature increase is out of control when the battery meets conditions such as acupuncture, over-charge, extrusion and fire, the microcapsule is molten and covers the surface of the positive electrode material, so that the volume resistivity of the material is enlarged; furthermore a reducing compound or a fire retardant compound is released, so that occurrence of the burning or explosion phenomenon caused by high temperature of the battery is reduced.

Methods for testing the hermeticity of casings for power sources intended to power implantable medical device by sensing the presence of vapors escaping from an electrolyte contained therein are described. More broadly, the present leak detection methods are applicable to any sealed enclosure having a first part sealed to a second part with a liquid contained therein. The liquid need not occupy the entire volume of the enclosure, but must contain at least one component having a vapor pressure at 25° C. of more than about 0.1 mm Hg. This component can assist in the functioning of the device such as an electrolyte, or be added for the sole purpose of leak detection.

An acid liquid leakage sensor quickly detecting liquid leakage from a device, such as a battery or the like, containing an acid liquid includes a first conductive member, a second conductive member, and an electrically insulating material which establishes an electrically insulating state between these first and second conductive members. The electrically insulating material includes a macromolecular compound having a basic functional group, and an electrical insulation characteristic or high resistance characteristic that decreases upon reaction with an acid liquid. It is possible to detect leakage of acid liquid, such as battery fluid, by detecting the change of conductive state between the first conductive member and the second conductive member which accompanies a decrease of the electrical insulation characteristic or high resistance characteristic of the electrically insulating material, when acid liquid leaks out and drips down the electrically insulating material.

Battery leakage detection system comprising a gas sensor having a gas sensitive nanoparticle structure.

The invention discloses an explosion-proof battery box. The box comprises a box body, one side of the box body is provided with a sealed flip plate, the inner cavity of the box body is divided by a partition plate into a battery storage cavity and a detection treatment cavity; battery sets are arranged in the battery storage cavity, the positive electrodes and negative electrodes of each set of batteries are both provided with temperature strain sheets; and one side of the box body is provided with a wire inlet/outlet hole, which is communicated with the battery storage cavity. The provided explosion-proof lithium battery box has the advantages of simple structure, convenient assembly, and low production cost. A deformation detector is used to detect whether the battery sets expand or not to prevent explosion. When an abnormal situation is detected, the power supply can be cut off immediately, thus the deterioration of the situation is inhibited, the happening of accident is avoided; the temperature strain sheets can sense the temperature of batteries, when the temperature of batteries is higher than a preset temperature, the power supply is cut off, and the risk of explosion is effectively reduced therefore.

A battery cell assembly includes a battery cell, a pouch, and a conductive lead. The pouch surrounds the battery cell and includes an inner insulative jacket, an outer insulative jacket, and a conductive foil disposed between the inner and outer insulative jackets. The conductive lead extends through the outer insulative jacket and is electrically coupled to the conductive foil. The conductive lead is configured to electrically couple to battery circuitry for monitoring a voltage on the conductive foil to determine a fault condition. The battery circuitry may include measurement circuitry for measuring the voltage on the conductive foil and logic circuitry for determining a fault condition based on the measured voltage.

[OBJECT] An object is to inspect leak of a film-sheathed battery 21 surely in a short time in a stage in which a battery module 1 has been assembled.

[SOLUTION TO PROBLEM] A battery module 1, which is formed by arranging a plurality of flat film-sheathed batteries 21 in layers and accommodating them in a case 11, has a slit at one end of a longitudinal direction, and a gas sensor 3 is inserted into this slit. A terminal portion 12 that is positioned at the other end of the longitudinal direction has a bolt hole that communicates with an inside of the case 11, and a blower 2 is connected to this bolt hole. Air is compulsorily introduced into the case 11 by the blower 2. The air passes through a periphery of the gas sensor 3, and flows out of the case 11. Therefore, the presence or absence of the leak can immediately be judged from an output of the gas sensor 3.

There is provided manufacturing method of battery comprising adhering process (S1) to adhere fluorescent material (leakage indicator including fluorescein) which emits fluorescence in response to predetermined light (ultraviolet radiation) irradiated under condition that electrolyte exists, to at least one portion of a surface on a battery case, and leakage detecting process (S2 through S9) to detect presence/absence of electrolyte leakage with fluorescence which an adhered portion emits in response to the predetermined light (ultraviolet radiation) irradiated on at least the adhered portion which has adhesion of the fluorescent material (leakage indicator including fluorescein), out of the surface on the battery case.

In a liquid leakage propagation restraining structure, a voltage detection terminal that detects the voltage of an electricity storage device is connected to an electrode of the electricity storage device so that a crimp contact surface side of the voltage detection terminal to which an electric cable is crimped faces in the direction opposite the direction to the electrode. Therefore, the structure restrains the electrolytic solution that has leaked out and propagated to the electric cable from entering the interior of the core wire of the electric cable.

A secondary battery system and a secondary battery failure detection system includes a monitoring unit, a main gas pipe, a plurality of auxiliary gas pipes, and a plurality of solenoid valves provided in correspondence with the respective auxiliary gas pipes. The monitoring unit includes a pump for sucking a gas supplied into the main gas pipe, an active material detection sensor for detecting active material contained in the gas, a failure module identification unit for identifying a module having a failure based on an output from the active material detection sensor, and a sequence controller for performing opening/closing operation of the solenoid valves in accordance with a predetermined sequence.

The invention relates to an electric vehicle power battery box liquid leakage detection system and a detection method thereof. The liquid leakage detection system comprises a plurality of liquid leakage detection devices, a signal processing unit, and an alarm unit, which are arranged in a power battery box. The output terminals of the liquid leakage detection devices are connected to the input terminal of the signal processing unit, and the output terminal of the signal processing unit is connected to the control terminal of the alarm unit. According to the detection method, the liquid leakage detection devices can detect whether liquid leakage happens in the battery box in real time, once the liquid leakage is detected, the signal processing unit can trigger the alarm unit to give off an alarm, moreover, the liquid leakage alarm can also be graded, thus a driver or related personnel can clearly know the leakage degree and carry out a corresponding treatment more pertinently. The using is more flexible, the intelligent degree is high, and the traveling safety is improved.

The invention relates to the technical field of leakage inspection equipment and a battery, in particular to a leakage inspection device and a battery module. The leakage inspection device is applied to a liquid cooling device of the battery module; the liquid cooling device comprises a component to be tested for containing cooling liquid; the leakage detection device comprises a liquid detection element, a central controller and a warning device; the central controller is electrically connected with the liquid detection element and the warning device; when detecting the liquid leakage of the component to be detected, the liquid detection element sends triggering information to the central controller; the central controller is used for controlling the warning device to warn when receiving the triggering information. The leakage inspection device and the battery module can feed back the cooling liquid leakage condition to a user in time, so that the user can take corresponding leakage blockage measures in time; the problems of battery rustiness, battery short circuit, battery damage, battery explosion, roadside breakdown and the like due to cooling liquid leakage can be solved; the service life of the battery is prolonged; the personnel safety of the user is protected.

A device and a method for checking the leak-tightness of an electrochemical energy store includes a detection unit that can detect a gas concentration in a battery housing that is closable. The detection unit is a metal oxide sensor connected to an evaluation unit, and as a function of the detected gas concentration a control signal is automatically generated by the evaluation unit for disconnecting the electrochemical energy store and/or for triggering a binder release unit.

An embodiment of the present invention provides a battery management system including an insulation resistance estimator configured to estimate insulation resistance corresponding to internal temperature and pressure of a battery pack to obtain an estimated value of the insulation resistance, a concentration estimator configured to estimate an internal gas concentration of the battery pack corresponding to the estimated value of the insulation resistance, a cell failure detector configured to detect whether a plurality of battery cells fail based on a state of charge (SOC) and a voltage of the plurality of battery cells accommodated in the battery pack, and a leak determiner configured to determine whether a battery cell leaks based on a detected result of the cell failure detector and based on the internal gas concentration corresponding to the estimated value of the insulation resistance.

The invention provides an early warning and alarming method for blowout of a power lithium ion battery. Five parameters including temperature, air pressure, CO, CXHX and pressing force are used to perform warning and alarming judgment, at least multiple levels of preset values from low to high are set for each parameter, and the warning and alarming level is judged according to the preset value level of the acquired parameters. According to the invention, multistage warning and alarming is carried out for thermal runaway of the battery by adopting multistage and diversified parameters, so thatthe thermal runaway state of the battery can be accurately controlled in real time.

The invention provides a battery cooling liquid linkage detection device, a battery cooling system and an automobile. The battery cooling liquid linkage detection device comprises at least one hydrogen concentration detection unit, a processing unit and an alarm output unit, wherein the hydrogen concentration detection units are arranged inside a battery accommodation space for holding battery modules on the automobile and are electrically connected with the treatment unit; the hydrogen concentration detection units are used for detecting the concentration of hydrogen generated when a coolingliquid leaking from the battery accommodation space and are used for transmitting the detected hydrogen concentration to the processing unit; the processing unit is connected with the alarm output unit; when the hydrogen concentration detected by using the hydrogen concentration detection units meets a first preset concentration threshold, a leaked liquid alarm signal can be output from the alarmoutput unit. Therefore, the leakage situation of a battery module cooling liquid can be effectively monitored, and danger caused by the hydrogen concentration can be avoided.

A battery pack system and a liquid leakage detection method thereof are provided. The battery pack system comprises battery cells, a isolated liquid and a battery box containing the isolated liquid. The battery cells are soaked in the isolated liquid. The battery box is formed with a isolated liquid outlet and a isolated liquid inlet. The outlet is connected together with the inlet via a circulation pump and a liquid separation device to form a circulation passage. When electrolyte leakage occurs to any of the battery cells, the electrolyte is separated into the liquid separation device and detected by a detection component. The present disclosure encloses the leaked electrolyte into the fire-retardant isolated liquid to prevent the electrolyte from contacting with the air so as to improve the safety of the battery box body.