Contemporary Amperex Technology (hong Kong) Limited

Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology Limited

Limei Zhang

Peipei Chen

Jiao Liu

Yao Jiang

Hailin Zou

Liye Li

Provided are a secondary battery, a battery module, a battery pack, and an electric device. The secondary battery includes: a positive electrode sheet and a non-aqueous electrolyte, where the positive electrode sheet includes a cathode active material with a core-shell structure, and the cathode active material includes a core and a shell covering the core; the core has a chemical formula of LiMnAPRO; where the first coating layer includes a crystalline pyrophosphate LiMPOand/or a crystalline pyrophosphate M(PO), the second coating layer includes a crystalline phosphate XPO, and the third coating layer is carbon; and the non-aqueous electrolyte includes a first lithium salt and a first additive, where the first lithium salt includes one or more selected from the group consisting of LiN(CFSO)(CFSO) and Li(FSO)N, where m and n each are a positive integer.

Secondary battery, battery module, battery pack, and electric device

Provided are a secondary battery, a battery module, a battery pack, and an electrical apparatus. The secondary battery comprises a positive electrode plate and a non-aqueous electrolyte solution, where the positive electrode plate comprises a positive electrode active material having a core-shell structure and comprising an inner core and a shell cladding the inner core, where the inner core has a chemical formula of LiMnAPRO, a first cladding layer comprises crystalline pyrophosphates LiMPOand/or M(PO), a second cladding layer comprises a crystalline phosphate XPO, and a third cladding layer is carbon; and the non-aqueous electrolyte solution comprises a first additive comprising one or more compounds in the group consisting of a compound represented by formula 1, a compound represented by formula 2, and a compound represented by formula 3, thereby improving rate performance, cycling performance, and high-temperature stability of a lithium manganese phosphate secondary battery.

Secondary battery, battery module, battery pack, and electrical apparatus

A secondary battery includes a positive electrode plate and a non-aqueous electrolyte. The positive electrode plate includes a positive electrode active material including a core and a shell enveloping the core. A chemical formula of the core is LiMnAPRO, where the first coating layer includes a crystalline pyrophosphate LiMPOand/or M(PO), the second coating layer includes a crystalline phosphate XPO, and the third coating layer is carbon. The non-aqueous electrolyte includes a first additive including one or more selected from a group consisting of compounds represented by formula 1 and compounds represented by formula 2.

Secondary battery, battery module, battery pack, and electric apparatus

Provided are a secondary battery, a battery module, a battery pack and an electrical apparatus. The secondary battery includes a positive electrode plate and a non-aqueous electrolyte solution. A positive electrode active material includes an inner core and a shell cladding the inner core. The inner core includes LiMnAPRO. The shell includes a first cladding layer cladding the inner core and a second cladding layer cladding the first cladding layer. The first cladding layer includes pyrophosphate MPOand phosphate XPO. The second cladding layer includes carbon. The non-aqueous electrolyte solution includes a first additive. The first additive includes one or more compounds in a group consisting of a compound shown in Formula 1, a compound shown in Formula 2 and a compound shown in Formula 3. The rate performance, cycling performance and high temperature stability of a lithium manganese phosphate secondary battery are increased.

Secondary battery comprising positive electrode plate and non-aqueous electrolyte solution

The present application provides a secondary battery and a battery module, battery pack and electrical device containing the same. The secondary battery comprises a positive electrode plate and an non-aqueous electrolytic solution, wherein the positive electrode plate comprises a positive electrode active material with a core-shell structure, said positive electrode active material comprising an core and a shell covering said core, said core has a chemical formula of LiMnAPRO; said shell comprises a first cladding layer covering said core, a second cladding layer covering said first cladding layer and a third cladding layer covering said second cladding layer, said non-aqueous electrolytic solution comprises a first additive, said first additive comprises one or more of compounds as shown by Formula 1, Formula 2 and Formula 3.

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Ningde, China

Limei Zhang