Battery, battery module, battery pack and electric vehicle

Abstract

The invention provides a battery, a battery module, a battery pack and an electric vehicle. The battery pack comprises a shell, end covers, partition plates and a plurality of pole core groups. The end covers are arranged at the two opposite ends of the shell so as to seal the inner space of the shell. The partition plates are arranged in the shell at intervals so that the inner space of the shell can be divided into a plurality of containing cavities which are sequentially arranged in the first direction. Each containing cavity is internally provided with the pole core set, each pole core set comprises at least one pole core, and the multiple pole core sets are sequentially arranged in the first direction and connected in series. A liquid injection channel is formed in the partition plate, is communicated with the containing cavity on at least one side of the partition plate, and is used for injecting the electrolyte into the containing cavity from the outside of the battery. And the liquid injection channel is in a closed state after liquid injection is completed so as to isolate communication between the containing cavity and the outside of the battery. A through hole is formed in the position, corresponding to the liquid injection channel on the partition plate, of the shell and is used for communicating the liquid injection channel with the outside of the battery. The battery provided by the invention has relatively high battery capacity and voltage, and the liquid injection problem of the battery can be effectively solved.

Description

technical field [0001] The present application belongs to the battery field, and in particular relates to a battery, a battery module, a battery pack and an electric vehicle. Background technique [0002] With the continuous popularization of new energy vehicles, the requirements for the use of power batteries in new energy vehicles are becoming higher and higher. In particular, as users continue to increase the mileage requirements of new energy vehicles, the overall capacity of power battery packs used in new energy vehicles needs to be continuously increased; at the same time, during the use of power battery packs, due to internal resistance, The internal friction is required to be minimized. [0003] Generally speaking, there is only one bare cell or multiple parallel-connected bare cells in the battery casing, and the voltage of the entire battery cannot be increased by including a single bare cell or multiple parallel-connected cells. For example, the voltage of lith...

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