NONAQUEOUS ELECTROLYTE BATTERY BATTERY PACK AND VEHICLE

• Main Authors: ISHIBASHI MITSURU, ISE KAZUKI, TAKAMI NORIO, YAMASHITA YASUNOBU, ISOZAKI YOSHIYUKI
• Format: Patent
• Language: English; Korean
• Published: 29.03.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TRANSPORTING; VEHICLES IN GENERAL

An embodiment of the present invention provides a non-aqueous electrolyte battery showing excellent durability at high temperature. The non-aqueous electrolyte battery comprises a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode current collector and a negative electrode composite layer disposed on the negative electrode current collector. The negative electrode composite layer is composed of titanium-containing metal oxide particles, which absorb and discharge lithium ions, and a binder including an acryl-based resin. The titanium-containing metal oxide particle has a phase including a carbon material on at least some of the surface. The negative electrode is formed according to formula (I), α / β > 6, wherein α represents the peel strength (kN/m) between the current collector and the negative electrode composite layer measured by a surface-interface cutting method and β represents cutting strength (kN/m) in the negative electrode composite layer measured by a surface-interface cutting method. 실시 형태에 의하면, 비수 전해질 전지가 제공된다. 이 비수 전해질 전지는, 정극과, 부극과, 비수 전해질을 포함한다. 부극은, 부극 집전체와, 이 부극 집전체 위에 배치되어 있는 부극 합제층을 포함한다. 부극 합제층은, 리튬 이온을 흡장 및 방출하는 티타늄 함유 금속 산화물 입자와 아크릴계 수지를 포함하는 결착제를 포함하고 있다. 티타늄 함유 금속 산화물 입자는, 표면의 적어도 일부에 탄소 재료를 포함하는 상을 갖는다. 이 부극은, 하기 식 (I)을 만족한다:여기서, α는 표면·계면 절삭법에 의해 측정되는 집전체와 부극 합제층의 박리 강도(kN/m)이며, β는 부극 합제층에 있어서의 표면·계면 절삭법에 의해 측정되는 절삭 강도(kN/m)이다.