Single battery, power battery pack and vehicle

Abstract

The application discloses a single battery, a power battery pack and a vehicle. The single battery includes: a casing and a pole core located in the casing; the casing has multiple surfaces, at least two of which are The surface is provided with an electrode terminal electrically connected to the pole core and extending out of the casing for drawing current, and the electrode terminals on each surface include a positive electrode terminal and a negative electrode terminal; the positive inner connection The two ends of the positive inner connecting piece are respectively connected to the positive electrode terminals on the two surfaces, and the two ends of the negative inner connecting piece are respectively connected to the negative electrodes on the two surfaces. The terminals are connected, and the surfaces of the positive inner connecting piece and the negative inner connecting piece are both provided with an insulating layer. In the single battery of the present application, two electrode terminals are provided on at least two surfaces of the single battery, and the electrode terminals with the same polarity on the two surfaces are connected through an inner connecting piece, which greatly reduces the internal resistance of the battery and enhances the overcurrent efficiency.

Description

technical field [0001] The present application relates to the technical field of vehicle manufacturing, and in particular to a single battery, a power battery pack with the single battery, and a vehicle with the power battery pack. Background technique [0002] In recent years, with the vigorous development of new energy vehicles, the performance requirements of on-board batteries have also increased. Among them, the Ministry of Industry and Information Technology, the National Development and Reform Commission, and the Ministry of Science and Technology jointly issued the "Medium and Long-term Development Plan for the Automobile Industry" to clarify the goal of power batteries in my country. By 2020, the specific energy of lithium-ion power batteries will be greater than 300Wh / kg; Energy strives to reach 260Wh / kg; cost is less than 1 yuan / Wh; operating environment ranges from minus 30°C to 55°C; has 3C charging capability, and strives to achieve 350Wh / kg for a single battery...

AI Technical Summary

Problems solved by technology

However, if the size of the battery is too large, the current will be transmitted to the tab side through the current collector and then drawn out through the tab, which will make the current collection path inside the battery pole piece near the opposite end too long, and the internal resistance will increase, thus affecting the high current of the power battery. Charge and discharge performance, safety performance, etc.

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