391results about "Cell/batteries leak testing" patented technology

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.

An energy storage control system includes a plurality of energy storage modules and a plurality of control apparatuses in one-to-one correspondence with the plurality of energy storage modules, where each control apparatus is connected to the corresponding energy storage module, and the energy storage module includes a battery unit and a power unit, the battery unit including at least one battery group. The control apparatus includes a sub-module controller and at least one battery management system in one-to-one correspondence with the at least one battery group, where each battery management system is connected to the corresponding battery group and the sub-module controller, and the sub-module controller is connected to the power unit.

An inspection method for a lithium secondary battery can improve the reliability, accuracy, and reproducibility of inspection results by advancing a learning of an artificial neural network according to one or more divided regions of one or more surfaces of the lithium secondary battery and one or more types of defects occurring in each region.

The invention relates to the technical field of power supply structures, in particular to a mining flame-proof power supply assembly which comprises a flame-proof box composed of a box body and a box cover, a plurality of flame-proof chambers arranged in the box body and battery pieces installed in the flame-proof chambers. By adopting a mode of separating a plurality of battery pieces, independent explosion-proof processing can be performed on each battery piece, so that mutual interference of the plurality of battery pieces is avoided, even if one battery piece explodes, other battery pieces are not influenced, property loss is reduced, explosive power is reduced, explosion isolation work is simpler, and the explosion isolation efficiency is improved. Meanwhile, by means of the mode that the control unit is disconnected with the battery pieces, explosion can be effectively avoided, and the working effects of explosion prevention and explosion interference are achieved.

A leakage electrolyte solution detection device includes a hyperspectral imaging device, an image extractor, and a determination unit. The hyperspectral imaging device includes an optical unit that collects reflected light by scanning a rechargeable battery on which the electrolyte solution injection process has been completed, a dispersive element that disperses light processed by the optical unit, and an image sensor that converts the light dispersed by the dispersive element into an electric signal, and acquires a hyperspectral image of a rechargeable battery. The image extractor extracts an image of a band related to a characteristic wavelength of an electrolyte solution from the hyperspectral image. The determination unit determines a presence or absence of a leakage electrolyte solution by analyzing the image extracted by the image extractor.

The present disclosure includes: a plurality of battery cells; an insertion member located between the plurality of battery cells; an inflow port formed on one side of the insertion member; and a cover member that covers the plurality of battery cells and the insertion member, the insertion member being capable of expanding when a fluid is injected into the insertion member through the inflow port.

A coolant leak detection and mitigation system for a rechargeable energy storage system having multiple battery cells arranged in individual battery modules includes a cooling system having a main coolant loop and multiple parallel coolant branches. Each coolant branch adjusts the temperature of one battery module using a portion of coolant from the main coolant loop. The cooling system also has flow-valve(s) for regulating and distributing the coolant from the main coolant loop across the coolant branches. An electronic controller is configured to monitor the cooling system for coolant loss and, in response to an indication of coolant loss, assess each coolant branch for a coolant leak. The controller is also configured to identify a coolant branch having a coolant leak and shut off, via the flow-valve(s), coolant flow into the coolant branch having the coolant leak.

An aspect of the present disclosure includes a battery module including a detection unit configured to detect leakage of an electrolyte from a battery cell, wherein the battery cell is a pouch-shaped battery, and wherein the detection unit is disposed at a lower end of a perimeter of a vertical plate comprising a busbar configured to allow an electrode of the battery cell to be electrically coupled thereto.

The disclosure provides a method, device and system for airtightness testing of a battery pack and a battery pack. The method for airtightness testing includes: placing a gas source device in a battery pack; sealing a case of the battery pack; detecting, in response to meeting a preset condition, concentration of a source gas in the battery pack, and determining whether the battery pack meets the airtightness standard. The system for airtightness testing includes a processor, a gas source device, a gas sensor, a first heating assembly used to heat a battery cell, and a second heating assembly used to heat the source gas. A battery management system can obtain a more accurate airtightness result by detecting the concentration of the source gas.

A battery case analyzing apparatus includes a sealing portion which covers an injection hole formed on an upper side of a battery case. The sealing portion includes a lower side contacting the upper side of the battery case, a gas injection passage, and a vacuum forming passage formed in the sealing portion. The apparatus includes a gas injection line which is connected to an inlet of the gas injection passage formed on an upper side of the sealing portion, a vacuum forming line which is connected to an outlet of the vacuum forming passage formed on the upper side of the sealing portion, a gas supply portion configured to inject gas into the battery case through the gas injection line, and a vacuum pump which is connected to the vacuum forming line to form a vacuum in a vacuum forming groove formed on the lower side of the sealing portion.

A method for inspecting a pouch battery cell for liquid leakage, the method including bringing a first electrolyte reaction sheet into contact with a top surface of the pouch battery cell, visually inspecting a change in a color of the first electrolyte reaction sheet, bringing a second electrolyte reaction sheet into contact with a bottom surface of the pouch battery cell, and visually inspecting a change in a color of the second electrolyte reaction sheet.

The subject matter relates to a leakage inspection device, which comprises a sealing box, a first inspecting component and a second inspecting component. The sealing box is provided with a sealing cavity for accommodating a workpiece; both the first inspecting component and the second inspecting component comprise a communicating state, an inspecting state, and a discharging state. The battery is placed inside the sealing cavity: firstly, switching the first inspecting component to the communicating state, switching the second inspecting component to the discharging state, vacuumizing the sealing cavity by the gas extracting device, and then switching the first inspecting component to the inspecting state to detect whether there is volatile gas in the sealing cavity, so as to determine whether the battery leaks.

A battery case leak testing device includes a housing having a testing port. A pump is in fluid communication with the testing port and is configured to generate a prescribed pressure at the testing port. A pressure sensor is in fluid communication with the testing port to measure fluid pressure at the testing port. A controller is in operative communication with the pump and the pressure sensor, and is configured to facilitate operation of the pump in a first mode and a second mode. In the first mode, the pump operates to generate a first prescribed pressure at the testing port. In the second mode, the pump operates to generate a second prescribed pressure at the testing port. The controller transitions the pump from the first mode to the second mode when the pressure sensor measures a prescribed pressure characteristic when the pump is operating in the first mode.

Readings may be received from a chemical sensor disposed proximate to a battery within a housing of a smart-home device. The readings from the chemical sensor may be processed to determine whether a chemical associated with an internal environment of the battery is present inside the smart-home device. A determination may then be made as to whether the battery is damaged based on whether the chemical is present inside the smart-home device. Alternatively, the device may determine that the chemical originates from outside of the housing of the device. A sequence of mitigation actions may then be executed to remedy the faulty battery or improve the indoor air quality.

A method and system for detecting the integrity of a high-voltage (HV) battery enclosure. The system uses sensors located within the battery enclosure to generate pressure and temperature sensor data. The system analyzes these data to detect any lack of integrity in the enclosure, such as leaks or breaches, which could compromise the battery's performance and safety. Upon detecting a potential integrity issue, the system generates an alert.

To provide an inspection method of a battery, capable of determining the presence / absence of a short circuit with high accuracy.SOLUTION: An inspection method of a battery, includes: an electrode assembly preparation step; an electrolyte liquid inspection step; a sealing step; and a short circuit determination step. An electrode assembly includes a non-facing region other than a region where a positive electrode active material layer and a negative electrode active material layer face each other. The short circuit determination step is a step where the presence / absence of the short circuit are determined by at least one method of the following methods (i) and (ii) before an initial charging. (i) a voltage of a power generation unit is measured under an atmospheric pressure, and when a measurement value of the voltage of the power generation unit is 0 V, it is determined that the short circuit occurs in the power generation unit. In the case where (ii) the voltage of the battery is measured under the atmospheric pressure, and the measurement value of the voltage of the battery is lower than a reference value obtained by multiplying an open circuit voltage of the power generation unit that is specified to a material of the positive electrode active material layer and a material of the negative electrode active material layer by the number of the power generation unit included in the battery, it is determined that the short circuit occurs in the battery.SELECTED DRAWING: Figure 1

The present disclosure relates to the field of battery technology, and discloses battery test tooling, and a use method and a control method for battery test tooling. The battery test tooling can improve the versatility of the battery test tooling. The battery test tooling comprises: a bracket, at least two sets of driving assemblies, and pressing members, wherein the driving assemblies are mounted on the bracket; and each set of driving assembly is provided with the pressing member, a pressing face on the pressing member that is away from the bracket being used to abut against a battery to be tested; and each of the pressing members is movable in a direction away from or approaching the bracket under the drive of the driving assembly. The battery test tooling provided in the present application is used to test the battery to be tested.

Presented are smart testing systems for detecting leaks in electrochemical devices, methods for making / using such testing systems, and memory-stored instructions for automating operation of such systems. A method of detecting a leak in an electrochemical device includes positioning a temperature-controlled (TC) screen with an electrothermal device at a predefined distance from an infrared camera to define therebetween a test envelope. A testing system controller commands the electrothermal device to modify the TC screen's operating temperature to a predefined screen testing temperature. After positioning an electrochemical device in the test envelope, between the TC screen and infrared camera, the infrared camera captures infrared images of the electrochemical device within the test envelope, showing the device's housing located in front of the TC screen. The system controller then analyzes the captured infrared images of the electrochemical device to determine if a gas leak is present in the device housing.

A computer-implemented method for controlling an energy storage system is disclosed. The method may comprise: Monitoring the energy storage system for state of charge anomalies, wherein the energy storage system comprises a plurality of battery units. Determining, in response to detecting a state of charge anomaly in at least one battery unit within the plurality of battery units, a cause for the state of charge anomaly. Controlling, based on the determined cause, the at least one battery unit.

The present application relates to a pressing mechanism, a gas tightness test pressing device, and a gas tightness test system. At least two pressing structures are arranged on a bearing member, and the pressing structures are configured to be movable on the bearing member. In a test process, the pressing structures separately abut against a piece under test. If the surface of the piece under test is in an irregular or concave-convex shape or the like, by moving the pressing structures and changing the distance D between each pressing surface and the bearing member, each pressing surface can abut against the surface of the piece under test. After each pressing surface abuts against the surface of the piece under test, each pressing structure is locked by using a locking structure, so that a curved surface formed by assembling of the pressing surfaces is better fitted to the surface of the piece under test, thereby achieving effective profiling, and guaranteeing that the surface of the piece under test can be effectively pressed. In this way, in a gas tightness test process, the piece under test is not prone to structural deformation due to pressure difference between the inside and the outside. In addition, the compatibility is high, and the pressing requirements in tests in respect of different surface shapes are effectively met.

An electric vehicle battery test vessel, includes a first housing portion configured to securely receive a battery of an electric vehicle, wherein the battery in contained in a sealed battery casing. A second housing portion is arranged to seal the storage battery in the first housing portion, and selectively open whereby the battery can be removed from or placed into the first housing portion. A sealing mechanism is configured to seal the first housing portion to the second housing portion;. A differential pressure source is arranged to create a pressure differential between an external pressure on an exterior of the battery casing and an internal pressure on an interior of the storage battery casing. A pressure sensor measures at least one of the external and internal pressures and monitors for pressure changes indicative of a leak in the battery casing.

Provided is a method for testing airtightness of battery cells, configured for testing the airtightness of the battery cells before liquid injection to screen out NG products. The method adds the pretesting of the battery cells before the initial testing and retesting of the battery cells, so that NG battery cells with a large leakage rate can be screened out in advance, thereby reducing the number of battery cells to be tested entering the following initial testing and retesting of the battery cells, and reducing the equipment area occupied by the retesting working station. Further, the method can achieve fast-paced helium testing and loading / unloading through two chambers that can perform helium testing, loading and unloading alternately, shortening the waiting time for mechanical actions during the initial testing, improving the efficiency of the helium testing, and further enhancing the overall work efficiency of the production line.

According to the energy storage system, a detection circuit can be configured for each battery pack in the system, and the detection circuit is used for detecting the insulation resistance between each battery pack and a protection ground wire PE and can upload the insulation resistance to a control center of the energy storage system. And the control center can be used for detecting and positioning the liquid leakage problem of the battery pack in time when the insulation resistance is increased abnormally.

A system and method of detecting leakage in a pouch-type battery cell includes a press unit configured to position and press the pouch-type battery cell, and a measurement unit configured to measure the insulation resistance of the cell pressed by the press unit.

A nail penetration test device, which can improve the performance of nail penetration tests. The device comprises: a voltage acquisition module, which comprises a first connection port and a second connection port, the first connection port being connected to a nail, and the second connection port being connected to a first electrode terminal of a battery cell; and a nail mechanism, which is used for controlling the nail to move towards the battery cell. The voltage acquisition module is used for measuring the voltage between the nail and the first electrode terminal during the process of the nail moving towards the battery cell, the voltage being used for determining an initial penetration position of the nail on the battery cell.

A coolant leak detection and mitigation system for a rechargeable energy storage system with multiple battery cells arranged in individual battery modules comprises a cooling system with a main coolant circuit and several parallel coolant branches. Each coolant branch adjusts the temperature of a battery module by using a portion of the coolant from the main coolant circuit. The cooling system also has one or more flow valves to regulate and distribute the coolant from the main coolant circuit to the coolant branches. An electronic control unit is configured to instruct a change in the coolant temperature in the main coolant circuit. The control unit is also configured to monitor the temperature change in each battery module in response to the temperature change in the main coolant circuit.The control unit is also configured to identify a battery module that exhibits a temperature change indicating a coolant leak and to interrupt the coolant flow into the coolant branch of the affected battery module.

Provided is a system for predicting a vent occurrence time of a battery cell, which includes a terrace portion having a sealing portion and provided on at least one side of a pouch type battery case and an electrode lead protruding from an end of the terrace portion, the system including a storage unit for collecting data about vent occurrence times according to widths of a remaining sealing portion, a measurement unit for periodically measuring a width of a remaining sealing portion of the battery cell to be measured, and a determination unit for predicting a vent occurrence time of the battery case to be measured by comparing a measured width of the remaining sealing portion with the collected data.

Provided is a system for predicting a time of occurrence of gas emission of a battery cell including a platform portion having a sealed portion and disposed on at least one side of a pouch-type battery case and an electrode lead protruding from an end of the platform portion, the system including a storage unit for collecting data on a time of occurrence of gas emission according to a width of a remaining sealed portion; a measurement unit for periodically measuring the width of the remaining sealed portion of the battery cell to be measured; and a determination unit for predicting the time of occurrence of gas emission of the battery case to be measured by comparing the measured width of the remaining sealed portion with the collected data.

The present invention relates to a leak detection system (1) for checking the leak-tightness of an object, the system (1) comprising: - a device (5) for pressurising a space; - a first pressure sensor (7) configured to measure the variations in pressure of the pressurised space; - a second pressure sensor (9) configured to measure the variations in ambient pressure, such as atmospheric pressure; - an electronic entity (15) configured to determine a leak F', F" depending on the variations in the pressure ΔΡ in the pressurised space and the variations in the ambient pressure APext, the variations ΔΡ, ΔΡext being measured over a predetermined test time interval W by the first (7) and second sensors (9), respectively.