Power battery with inner cavity not liable to deform

Abstract

The invention relates to the field of production of a power battery, and in particular to a power battery with an inner cavity not liable to deform. The power battery with the inner cavity not liable to deform is implemented according to the following technical scheme and comprises a box body and a battery module, wherein the battery module is arranged in the box body, the box body comprise a box body plate, the box body plate comprises two layers of plate bodies and a hollow cavity, the hollow cavity is arranged between the two layers of the plate bodies, a protection air bag is arranged in the hollow cavity and comprises a plurality of bag bodies, a plurality of crosslinking pipes and an inflatable pipe, the plurality of bag bodies are arranged in a rectangular array, the plurality of crosslinking pipes are in parallel and are connected in series with the plurality of bag bodies, and the inflatable pipe is jointly connected with the crosslinking pipes. The invention aims to provide the power battery with the inner cavity not liable to deform, the heat dissipation or heat preservation effect can be adjusted according to different ambient temperatures, the chemical property of the power battery is improved, and the service lifetime of the power battery is prolonged; and moreover, with the deformation-resistant design, a support and buffer structure is additionally arranged, and the shape completeness of the whole battery is protected.

Description

technical field [0001] The invention relates to the field of power battery production, in particular to a power battery whose inner cavity is not easily deformed. Background technique [0002] Compared with other batteries, the power battery has high voltage, high energy density, good cycle performance, small self-discharge, [0003] No memory effect, wide operating temperature range and other advantages. The structure of a general lithium-ion power battery is: in the form of laminations, a battery cell formed by interleaving the positive electrode sheet, separator, and negative electrode sheet, or a battery cell made in the form of a winding, and then connected to an external terminal, put into a hard case such as a plastic case, Electrolyte is injected into the steel shell, aluminum shell or aluminum-plastic film. For traditional lithium-ion power batteries, the positive electrode is generally made of nickel-cobalt lithium manganese oxide, lithium iron phosphate, lithium...

AI Technical Summary

Problems solved by technology

However, most of the existing battery packs use ordinary structures, and the temperature of the surrounding environment has a great impact on the performance of the power battery.

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