NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND SECONDARY BATTERY MODULE

• Main Authors: ASARI TAKUYA, MORIKAWA ARINORI, YANAGIDA KATSUISA, KATO YO, SHIMAMURA HARUNARI, TSUZUKI KOHEI
• Format: Patent
• Language: English; Japanese
• Published: 27.09.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To hold down an amount of heat generation of a battery in a nail pricking test.SOLUTION: A secondary battery module disclosed herein comprises: a nonaqueous electrolyte secondary battery; and an elastic body arrayed together with the nonaqueous electrolyte secondary battery and receiving a load from the nonaqueous electrolyte secondary battery toward a direction of the array. The nonaqueous electrolyte secondary battery comprises: an electrode body arranged by laminating a positive electrode, a negative electrode, and a separator to be disposed between the positive and negative electrodes; and a housing for encasing the electrode body. The elastic body has a compression modulus of 5-120 MPa. The positive electrode has a positive electrode current collector containing Al and an element other than Al. The positive electrode current collector has a thermal conductivity of 65-150 W/(m K). The negative electrode includes a negative electrode active material layer having a first layer and a second layer which are formed in turn from a negative electrode current collector side. The first layer has first carbon-based active material particles of 3 MPa or smaller in 10%-bearing force. The second layer has second carbon-based active material particles of 5 MPa or larger in 10%-bearing force.SELECTED DRAWING: None 【課題】釘刺し試験における電池の発熱量を抑制する【解決手段】本開示は、非水電解質二次電池と、前記非水電解質二次電池と共に配列され、前記非水電解質二次電池から前記配列方向に荷重を受ける弾性体と、を有する二次電池モジュールであって、前記非水電解質二次電池は、正極、負極、及び前記正極及び前記負極との間に配置されるセパレータとを積層した電極体と、前記電極体を収容する筐体と、を備え、前記弾性体の圧縮弾性率は５ＭＰａ〜１２０ＭＰａであり、前記正極は、Ａｌ及びＡｌ以外の元素を含む正極集電体を有し、前記正極集電体の熱伝導率は６５Ｗ／（ｍ・Ｋ）〜１５０Ｗ／（ｍ・Ｋ）であり、前記負極は、負極集電体側から順に形成される第１層及び第２層を有する負極活物質層と、を有し、前記第１層は、１０％耐力が３ＭＰａ以下の第１の炭素系活物質粒子を有し、前記第２層は、１０％耐力が５ＭＰａ以上の第２の炭素系活物質粒子を有する。【選択図】なし