Power battery pole ears and power battery

Abstract

The invention provides power battery pole ears and a power battery. The power battery pole ears are a hollow conductive cylinder. The power battery comprises a casing, an electric core and an electrolyte which are arranged in the casing, a positive pole ear and a negative pole ear which are electrically connected with the electric core, and an electrolyte circulating pump and an electrolyte constant temperature system which are externally arranged on the casing. The positive pole ear and the negative pole ear are the power battery pole ears, one end parts of the power battery pole ears both extends out of the casing, the end part of negative pole ear, which extends out of the casing, is successively connected via an electrolyte guide pipeline with the electrolyte circulating pump, the electrolyte constant temperature system and the end part of the positive pole ear, which extends out of the casing, and an electrolyte circulation channel is formed. The power battery pole ears enable the electrolyte to flow in and out through the hollow pipeline. The power battery is stable in working temperature and high in safety performance.

Description

technical field [0001] The invention belongs to the technical field of power batteries, and in particular relates to a power battery tab and a power battery. Background technique [0002] With the wide application of lithium-ion batteries in power vehicles, mobile phones, notebook computers and other digital products, people's requirements for the performance of lithium-ion batteries are also getting higher and higher. Not only do they hope that lithium-ion batteries have excellent electrochemical properties, Low price also requires lithium-ion batteries to have reliable safety performance. [0003] The shells of existing lithium-ion batteries are divided into metal shells and plastic shells. Metal shells include steel shells and aluminum shells, etc., and non-metallic shells include plastic shells and aluminum-plastic film packaging. In comparison, lithium-ion batteries prepared with non-metallic shells have relatively reliable safety performance. But no matter what kind ...

AI Technical Summary

Problems solved by technology

Although different heat dissipation methods can reduce the internal temperature of the battery to a certain extent, the use of aluminum heat sinks on the one hand increases the weight of the power battery pack itself, and also increases the production cost of the battery pack

However, the method of reserving space between the battery cells and then using air circulation to take away the heat can not conduct the heat well when the battery is working in a harsh environment. Reduced volume specific energy density and power density of the battery pack

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