Back to results
US 12,669,458 B2Granted
Welding inspection apparatus for battery modules
AssigneeLG Energy Solution, Ltd.
InventorsDae Hee Son, Chang Hui Lee, Jin Woo Ku
Life of this patent
Estimating the term…
Abstract
Discussed is a welding inspection apparatus for battery modules capable of applying an alternating current to a bank constituted by two or more battery cells connected in parallel and a battery module constituted by one or more banks connected in series to calculate an impedance and a resistance value of each of the one or more banks, and a method of inspecting welding of the battery module using the welding inspection apparatus.
Claims13
A welding inspection apparatus for battery modules, the welding inspection apparatus comprising:
- a bank constituted by two or more battery cells connected in parallel;
- a battery module constituted by one or more banks connected in series;
- an alternating current application unit configured to apply an alternating current to an entirety of the battery module;
- and
- a measurement unit configured to measure an impedance of each of the one or more banks,
- wherein, when a resistance value of each of the one or more banks is greater than a predetermined resistance value, a determination is made that a welding of at least one of the two or more battery cells in the bank is defective, and a quantity of defects in each of the one or more banks is determined based on resistance values with respect to a frequency of the alternating current of the one or more banks that is greater than a predetermined frequency, and
- wherein the resistance value increases as a number of welding defects present in a relevant bank increases, such that welding defects occurring in the relevant bank is quantitatively identified.
4 more elements
Dependencies are inferred from the claim text.