一种锂离子电池及用电装置

本申请提供一种锂离子电池及用电装置，锂离子电池中，正极涂层的锂离子迁移动力学系数Fc和负极涂层的锂离子迁移动力学系数Fa满足：0.25≤Fc/Fa≤5；Fc=2(Dvc50+5Mc)+PDc/4Pc，Fa=Dva50+Ma+PDa/2Pa，Dvc50为正极涂层中正极活性物质的平均粒径；Mc为正极极片的内阻；PDc为正极涂层的压实密度；Pc为正极涂层的孔隙率；Dva50为负极涂层中负极活性物质的平均粒径；Ma为负极极片的内阻；PDa为负极涂层的压实密度；Pa为负极涂层的孔隙率。上述锂离子电池中锂离子在正极涂层的脱出速度与其在负极涂层的嵌入速度达到相对平衡，保证锂离子电池的充电能力。 The pr...

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Format:	Patent
Sprache:	chi
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Zusammenfassung:	本申请提供一种锂离子电池及用电装置，锂离子电池中，正极涂层的锂离子迁移动力学系数Fc和负极涂层的锂离子迁移动力学系数Fa满足：0.25≤Fc/Fa≤5；Fc=2(Dvc50+5Mc)+PDc/4Pc，Fa=Dva50+Ma+PDa/2Pa，Dvc50为正极涂层中正极活性物质的平均粒径；Mc为正极极片的内阻；PDc为正极涂层的压实密度；Pc为正极涂层的孔隙率；Dva50为负极涂层中负极活性物质的平均粒径；Ma为负极极片的内阻；PDa为负极涂层的压实密度；Pa为负极涂层的孔隙率。上述锂离子电池中锂离子在正极涂层的脱出速度与其在负极涂层的嵌入速度达到相对平衡，保证锂离子电池的充电能力。 The present application provides a lithium-ion battery and an electrical device. In a lithium-ion battery, the lithium ion migration kinetic coefficient Fc of the positive electrode coating and the lithium ion migration kinetic coefficient Fa of the negative electrode coating satisfy: 0.25≤Fc/Fa≤5; Fc=2(Dvc50+5Mc)+PDc/4Pc, Fa=Dva50+Ma+PDa/2Pa, Dvc50 is an average particle size of a positive active material in the positive electrode coating; Mc is an internal resistance of the positive electrode plate; PDc is a compaction density of the positive electrode coating; Pc is a porosity of the positive electrode coating; Dva50 is an average particle size of a negative active material in the negative electrode coating; Ma is an