BATTERY PACK AND ELECTRIC DEVICE

The present application provides a battery pack and a power consuming device. The battery pack includes a battery pack case and a plurality of battery cells accommodated in the battery pack case. An inner space of the battery pack case may be divided into a first region located at the center and a s...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LIN, Yunmei, FU, Chenghua, OUYANG, Shaocong, XIE, Tingzhen, XU, Baoyun
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	The present application provides a battery pack and a power consuming device. The battery pack includes a battery pack case and a plurality of battery cells accommodated in the battery pack case. An inner space of the battery pack case may be divided into a first region located at the center and a second region enclosing the first region. The plurality of battery cells include: at least one first battery cell disposed in the first region; and at least one second battery cell disposed in the second region. An internal resistance of the first battery cell and an internal resistance of the second battery cell increase with the decrease of a temperature. When the internal resistance of the first battery cell and the internal resistance of the second battery cell are respectively RA1 and RB1 at 25°C and are respectively RA2 and RB2 at -20°C, 1 ≤ RB1/RA1 ≤ 2 and 1.2 ≤ RB2/RA2 ≤ 2.5, optionally, 1.3 ≤ RB1/RA1 ≤ 1.6 and 1.3 ≤ RB2/RA2 ≤ 1.7. Using the battery pack of the present invention can improve the charge and discharge performance of the battery pack at a low temperature.