Battery module, battery module group and battery module group packaging method

Abstract

The invention provides a battery module, a battery module group and a battery module group packaging method. The battery module is formed through arranging an unclosed annular heat tube with a gap between adjacent batteries, the unclosed annular heat tube encircles along the edge of the corresponding battery, and the gap of the unclosed annular heat tube is arranged at one side opposite to the electrodes of the corresponding battery, so the unclosed annular heat tube passes through the much heat electrode position of the battery, and can transmit heat generated by the electrodes to the shell of the battery module; heat dissipating plates are arranged at the side surfaces of the battery module, unclosed annular heat tubes between the batteries can be compressed, so the batteries are compact and reliable, have strong heat homogenizing and dissipating performances, have high safety, effectively improve the working efficiency of the battery module and effectively prolong the service life of the battery module; and the shell cooperates with the heat dissipating plates to simply and flexibly package the batteries in the shell, so the time and the cost of the packaging method are saved.

Description

Technical field [0001] The invention relates to the technical field of power supplies, and in particular to a battery module, a battery module, and a battery module packaging method. Background technique [0002] With the advancement of science and technology and the enhancement of human awareness of environmental protection, the green energy industry at home and abroad has entered a stage of rapid development, using carbon for the negative electrode, lithium transition metal composite oxide for the positive electrode, and carbonate mixtures. Lithium-ion batteries based on electrolytes have been widely known. In a lithium ion battery with this configuration, since carbonate is stable to the oxidation and reduction of water and other organic solvents and can obtain a higher voltage, it can be obtained than as a water-based battery (water-based battery). ) Ni-MH battery has greater energy density and higher capacity. Therefore, the electric vehicle industry, notebook computers, m...

AI Technical Summary

Problems solved by technology

[0004] 1. Safety issues: Since the outer packaging of flexible-packaged lithium-ion battery cells is a layer of aluminum-plastic film, the entire cell is relatively soft, and the compactness of the battery is low when the cells are stacked, so the packaging film of each cell is very fragile. It is easy to be punctured, battery safety, how to effectively protect the integrity of the cell packaging film and ensure the compactness of the battery, and improve the safety of the battery pack from the packaging structure of the battery pack, so that the battery pack can operate at high capacity, high power, and high voltage. Safe operation under the condition of high current charging and discharging has become a key problem to be solved in the design of battery pack packaging structure

[0005] 2. Heat dissipation problem: In the process of charging and discharging with high current, due to the heating of the battery core, the heat accumulation of the battery pack will lead to a decrease in the consistency of the battery, and the expansion of the battery core will affect the consistency and stability of the batteries after the battery is grouped. An important indicator of balance, which reduces the cycle life of the battery

[0006] 3. The problem of complex structure and high cost: when the soft-pack lithium-ion battery is used as a power source for charging and discharging with large capacity, high power, high voltage, and high current, it is first necessary to use modular technology to combine battery cells into suitable modules , and then assembled into a battery module (battery box)

It can be seen that in many packaging structures in the prior art, a plate-shaped structure is used to conduct heat and dissipate heat from the battery cells, and a corresponding cell installation structure is arranged on the heat conduction plate. The assembly precision and alignment precision requirements of the production molds of packaging structures such as hard frames are relatively high, resulting in complex production processes and high production costs. The compactness of the battery is low when the cells are stacked

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