Sodium ion battery energy storage process and device

Abstract

The invention discloses a sodium ion battery energy storage process and device, and relates to the technical field of sodium batteries. The sodium ion battery energy storage process comprises the following specific steps: 1, placing a sodium ion battery in an energy storage machine, and electrically connecting the energy storage machine with the sodium ion battery; 2, an energy storage machine detecting the state of each sodium ion battery, if the voltage of the sodium ion battery is lower than a pre-energy-storage voltage threshold value, the energy storage machine pre-storing energy of the sodium ion battery, the pre-energy-storage current being 400-490 mA/min, the pre-charging time being 13-18 min, the energy storage machine performing cyclic heating treatment, and the temperature in the energy storage machine being controlled to 38-46 DEG C. According to the method, the pre-energy-storage sodium ion battery is heated, so that the activity of the sodium ion battery is improved, the speed of entering an energy-storage balance point is accelerated, and the sodium ion battery can quickly reach the balance point; cooling treatment is carried out in the balanced energy storage stage, so that the sodium-ion battery is cooled to a stable state, potential safety hazards during energy storage of the sodium-ion battery are avoided, and the sodium-ion battery with large weight can be conveniently assembled and disassembled and can be conveniently assembled and disassembled in an energy storage machine.

Description

technical field [0001] The invention relates to the technical field of sodium batteries, in particular to a sodium ion battery energy storage process and device. Background technique [0002] Lithium-ion secondary batteries have the advantages of large specific energy density, wide operating temperature range, long charge and discharge life, small self-discharge, and no memory effect. Its mass energy density can reach 280Wh / kg, and it is considered to be the most promising chemical power supply. In recent years, it has shown remarkable development prospects in the fields of power batteries and energy storage batteries. [0003] However, the lithium resources on the earth are not abundant. The abundance of lithium in the earth's crust is only 0.0065%, and the distribution is very uneven. With the coming of electric vehicles and smart grid era in the future, the shortage of lithium resources and the high price It must become an important factor restricting its development. ...

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Problems solved by technology

[0004] The energy storage method of sodium ion battery has certain disadvantages when it is used. (1) When storing energy in sodium ion battery, due to the mutual transformation between ions, a certain amount of heat is generated, and the energy storage rate also rises differently with the increase of temperature. High, until the energy storage balance point is reached, the early temperature does not meet the requirements, and it takes a long time to reach the balance point, which is not conducive to quickly reaching the balance point; (2) After reaching the balance point, due to the high temperature, there is a certain safety in sodium-ion batteries Hidden danger: overflow pipe (3), the existing sodium-ion battery is slow in energy storage, and the energy storage cycle is long; the control box (4), the weight of the sodium-ion battery during energy storage is relatively large, which is not conducive to loading and unloading in the energy storage machine

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