Lithium-ion battery internally provided with heat dissipation structure

Abstract

The invention discloses a lithium-ion battery internally provided with a heat dissipation structure. The lithium-ion battery comprises a battery shell (2), wherein a positive pole column (11) and a negative pole column (12) are arranged at left and right ends of the top part of the battery shell (2); the battery shell (2) is internally provided with a battery cell chamber (3); the battery cell chamber (3) comprises a plurality of pole groups (30) which are vertically arranged in parallel from front to back; at least one heat dissipation sheet (5) is arranged at the outer side of any one pole group (30); each heat dissipation sheet (5) is connected with an inner wall of the battery shell (2). According to the lithium-ion battery disclosed by the invention, the battery is internally providedwith the heat dissipation sheets, heat in the battery can be rapidly and effectively dissipated and conducted in time and the heat is dissipated to the outer part of the battery, so that performanceand safety problems caused by the fact that the temperature in the battery is not uniform and the inner part is overheated are effectively prevented; the utilization safety of the battery is ensured and a scale industry can be formed; the lithium-ion battery is widely applied and has great production practical meaning.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium-ion battery with a built-in heat dissipation structure. Background technique [0002] At present, lithium-ion batteries have the advantages of high working voltage, high specific energy, long cycle life, and no environmental pollution. They are not only widely used in mobile communication equipment and portable electronic equipment, but also widely used in electric vehicles, electric bicycles and In terms of large and medium-sized electric equipment such as electric tools, it is the main direction for the development of major battery manufacturers at present. [0003] For the requirements of electric vehicle cruising range, energy density, power density, etc., lithium-ion power batteries are constantly developing in the direction of high energy density, high power density, and low cost. For this reason, when battery manufacturers design lithium-ion batteries, they us...

AI Technical Summary

Problems solved by technology

[0004] If the battery is charged and discharged with a large current, especially for a large-capacity, large-volume battery, it is easy to cause problems such as high heat generation rate, high core temperature, and difficulty in dissipating heat quickly, which is not only serious Damage the performance and life of the battery, and in severe cases, it can also cause thermal runaway of the battery, which seriously threatens the use and safety of the battery

[0005] For this reason, in order to dissipate heat from the battery, the usual way is to add air cooling, liquid cooling and other devices to the battery system after the battery is assembled, which will take up valuable limited space on the car and reduce the energy consumption of the battery. The overall energy density of the battery increases the overall production cost, and it is difficult to dissipate the heat inside the battery, especially the large-capacity battery, in a timely and effective manner

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