DEVICE AND METHOD OF ESTIMATING GAS INSIDE SECONDARY BATTERY

• Main Authors: NAKAMURA KOTARO, UEKI TAKAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 17.10.2023
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BASIC ELECTRIC ELEMENTS; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TRANSPORTING; VEHICLES IN GENERAL

To estimate a component of and the amount of gas generated inside a secondary battery while reducing a cost.SOLUTION: A device of estimating gas inside a secondary battery according to an embodiment of a present disclosure, for estimating the amount of and a component of an internal gas generated inside the secondary battery which can be charged and discharged, includes: one or more processors; and one or more memories electrically connected to the processor(s). Each processor detects the presence/absence of a gas generation period where the secondary battery is located in an overcharge state of the secondary battery exceeding at least an appropriate use limit and a high temperature state of the secondary battery exceeding the appropriate use limit, and estimates the amount of and a component of the internal gas on the basis of an integration result of a voltage value of the secondary battery in the gas generation period.SELECTED DRAWING: Figure 1 【課題】よりコストを低減しつつ二次電池の内部で発生したガスの成分と量を推定する。【解決手段】本開示の一形態における二次電池の内部ガス推定装置は、充放電可能な二次電池の内部で発生する内部ガスの量および成分を推定する内部ガス推定装置であって、１又は複数のプロセッサと、前記プロセッサと電気的に接続された１又は複数のメモリと、を含み、前記プロセッサは、少なくとも適正使用上限を超えた前記二次電池の過充電状態と、前記適正使用上限を超えた前記二次電池の高温状態と、に前記二次電池が置かれたガス発生期間の有無を検出し、前記ガス発生期間における前記二次電池の電圧値の積分結果に基づいて前記内部ガスの量および成分を推定する。【選択図】 図１