According to one aspect of the present invention, a short circuit inspection method for an all solid battery assembly is provided which includes: a step of preparing an all-solid-state battery assembly; a step of preparing a restraint jig including a pair of restraint plates sandwiching the all-solid-state battery assembly in the thickness direction, and a restraint member including a bolt and a nut, wherein where a smallest thermal expansion coefficient among the thermal expansion coefficient of the positive electrode current collector and the thermal expansion coefficient of the negative electrode current collector of the all-solid-state battery assembly is denoted by 1, the thermal expansion coefficients of the bolt and the nut are each equal to or greater than 1; a step of restraining the all-solid-state battery assembly; a step of increasing the resistance of the all-solid-state battery assembly by cooling; a step of applying a voltage to the all-solid-state battery assembly and measuring a current; and a step of determining whether or not a short circuit has occurred in the all-solid-state battery assembly on the basis of the measured current value.

A jig for a battery charging and discharging test includes a first frame and a second frame which are disposed in parallel to each other so as to be spaced apart from each other. Two mounting rails are installed to protrude forward to connect the first and second frames, and have slit grooves open in directions facing each other. Each have an open side, such that the battery pack is mounted on the mounting rails through a rail-type structure. An anode unit and a cathode unit are arranged on either side of the mounting rails, and brought into contact with a first terminal and a second terminal of the battery pack coupled to the mounting rails, respectively. The jig can fix a battery at various angles to flexibly cope with various test environments, in order to perform a battery charging and discharging test.

Disclosed is a system for charge-discharge cycler, particularly to a system for charge-discharge cycler in which a structure of a shunt is improved to improve performance/accuracy of a current control as a key component of an instrument for testing a secondary battery charge-discharge. A system for charge-discharge cycler has the effect of improving the degree of precision/performance of the current control during a charge/discharge inspection of the secondary battery, thereby raising the standard of development/aspect of the secondary battery and developing a charge/discharge performance tester of high performance.

A spot welding-type system is provided adapted to facilitate evaluating a rechargeable battery. The system includes first and second electrodes to contact the rechargeable battery. The first electrode includes a first contact surface to facilitate inducing an internal short circuit within the rechargeable battery during operation of the spot welding-type system, and the second electrode includes a second contact surface to contact the rechargeable battery. The first and second contact surfaces are dissimilar contact surfaces, and the second contact surface is larger than the first contact surface. The system with the rechargeable battery disposed between the first and second contact surfaces produces, in operation, a localized pressure on, and a localized heating of, the rechargeable battery in a spot-sized region where the first contact surface contacts the rechargeable battery to facilitate generating and evaluating a potential internal short circuiting of the rechargeable battery.

The present invention relates to a vibration test jig for a cylindrical battery cell, including: a main body for accommodating a cylindrical battery cell; and a connection unit electrically connected to an electrode terminal of the cylindrical battery cell, wherein the connection unit includes: a connection member electrically connected to the electrode terminal and withdrawn to the outside of the main body; a support member for supporting the connection member; and a fixing member for fixing the support member on the main body. The vibration test jig enables the cylindrical battery cell mounted in the jig to be electrically connected to an external voltage and resistance measuring device through the connection unit. During a vibration test, an electrical state of the battery cell can be monitored in real time, and it can be checked whether and when an electrode tab is disconnected by using the measured voltage or resistance value.

A voltage source watchdog comprising a passive device is placed in series between a voltage source and a load. The passive device includes an electromigration (EM) joint of known materials that will create an electromigration void after a specified amount of current passes through the EM joint. After a known amount of current as passed through, a void is created and a voltage will no longer be sensed, thus providing a sure safety mode situation. When the voltage source is a battery, the battery life may be extended by selectively enabling voltage measurement operations for the proposed watchdog.

A jig for impedance measurement of a battery cell includes: a jig body configured to receive a battery cell in a longitudinal direction; a first bus bar installed on a first side of the jig body, the first bus bar being configured to couple to a first lead part of the battery cell; a second bus bar installed on a second side of the jig body, the second bus bar being configured to couple to a second lead part of the battery cell; an impedance measuring board in the jig body; and a conducting line for impedance measurement connecting the first bus bar, the impedance measuring board, and the second bus bar to constitute an impedance measuring circuit. A part of the conducting line for impedance measurement faces a surface of the battery cell and extends in the longitudinal direction of the battery cell.

Disclosed is a pressure activation apparatus, and particularly to a pressure activation apparatus with a short-circuiting inspection section for a battery cell, in which a short-circuiting inspection, an activation process, and a charging and discharging process are sequentially and successively performed for a plurality of battery cells within a single pressure activation apparatus, and thus there is no need to separately build short-circuiting inspection equipment, thereby reducing the maintenance, efforts and costs of performing the short-circuiting inspection process, the pressure activation process and the charging and discharging process for the battery cell, and reducing unnecessary waste of space, time, costs, etc. to build the separate equipment.

A method of diagnosing a conducting structure includes providing the conducting structure in a magnetic field, immersing the conducting structure in a detection medium, or placing a detection medium in the vicinity of the conducting structure, exciting nuclear or electronic spins within the detection medium using a broad-band excitation pulse, receiving an NMR or ESR spectrum from the detection medium, obtaining a frequency distribution of the detection medium, and indirectly measuring internal characteristics of the conducting structure by characterizing frequency changes in the frequency distribution. Conducting structures are analyzed on the basis of changes in magnetic susceptibilities and internal electric current distributions, which may change over the course of a charging/discharging cycle, and a result of degradation and failure of the conducting structure. The conducting structure may be, for example, a battery, a capacitor, a supercapacitor, a fuel cell, or a catalyst material.

Designs of thermo-hygrostat devices capable of uniformly maintain temperature and humidity inside a chamber are disclosed. One example of such a device can include, among others, a chamber in which a sample is accommodated and internal temperature and humidity can be controlled; a lower duct provided on a first side of the chamber and sending a fluid inside the chamber to an outside of the chamber; a temperature and humidity control portion provided on the lower duct and controlling temperature and humidity of a fluid received from the lower duct.