Cooling-type lithium-ion battery

Abstract

The invention provides a cooling-type lithium-ion battery, and relates to the field of battery preparation, in particular to the field of lithium-ion battery manufacturing. The cooling-type lithium-ion battery is characterized in that a housing is in an elliptic cylindrical form; an inner cavity which is matched with the shape of an inner shell is arranged in the housing; the inner shell is in the elliptic cylindrical form; a battery core is arranged between the housing and the inner shell; the top part or the bottom part of the battery core is provided with a positive electrode, a negative electrode and a safety valve; the battery core comprises positive plates, isolating membranes and negative plates; a plurality of positive plates, isolating membranes and negative plates are arranged in a winding manner; the isolating membranes are located between the adjacent positive plates and negative plates to partition the positive plates and the negative plates; connecting columns are arranged at the left end and the right end of the housing; and heat sink materials cover a surface layer of the housing (1) and an inner layer of the inner shell respectively. The defect of poor heat dissipation performance of an existing high-capacity lithium-ion battery is avoided; and the lithium-ion battery provided by the invention is good in heat dissipation performance, long in cycle lifetime and simple in component modules.

Description

technical field [0001] The invention relates to the field of battery preparation, in particular to the field of lithium ion battery manufacturing. Background technique [0002] Lithium-ion battery is a new type of energy storage battery developed in recent years. It has attracted people's attention due to its good cycle life, environmental friendliness, and low price. It is used in electric vehicles, energy storage fields and digital electronics. and other directions, but most of the lithium-ion batteries currently used in the market are small-capacity batteries (≤20Ah), which have low heat dissipation performance during high-rate charge and discharge, and have no obvious impact on the battery. For large-capacity lithium-ion batteries ( ≥20Ah), because charging and discharging at a large rate (≥10C) will generate a lot of heat, and it is difficult to dissipate heat when stored inside the battery, seriously affecting the internal heat distribution of the battery, and affectin...

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a heat-dissipating lithium-ion battery, which not only solves the defects of the current large-capacity lithium-ion battery such as poor heat dissipation performance, but also provides a lithium-ion battery with good heat dissipation performance, long cycle life and simple composition modules

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