Composite vacuum heat preservation box for energy storage sodium sulfur battery module

Abstract

The invention provides a composite vacuum heat preservation box for an energy storage sodium sulfur battery module. The composite vacuum heat preservation box is characterized in that a composite vacuum heat preservation technology is adopted; the outer wall temperature of the heat preservation box is room temperature; a planar heating mode is adopted in the heat preservation box; and a plurality of thermal compensation points are provided in the heat preservation box according to a heating size in the heat preservation box, so that a temperature blind area brought by large size of the heat preservation box is eliminated. Heat generated by a heating source in the heat preservation box can be maintained in the heat preservation box to the greatest extent, so that the problem of non-uniform heat or heat loss in a large-size heat preservation state can be solved; the outer wall temperature of the heat preservation box is the room temperature, adverse impact is not caused to the running environment around the heat preservation box; a heat preservation layer of the heat preservation box is less than that in a non-vacuum heat preservation mode, so that the heat preservation box has the advantages of low cost and maintenance freeness.

Description

technical field [0001] The invention provides an insulated box for an energy storage sodium-sulfur battery module. The insulated box adopts composite vacuum insulation technology, and the interior of the insulated box can provide a constant temperature field for maintaining several groups of sodium-sulfur batteries working at 315-335°C. The temperature of the outer wall of the box is room temperature and belongs to the field of physical and chemical devices. Background technique [0002] Sodium sulfur battery (NAS for short) uses beta-alumina ceramics with good sodium ion conductivity as the electrolyte, metallic sodium as the negative electrode material, and non-metallic sulfur as the positive electrode material. When the battery is charged and discharged, the external electrical energy is converted into chemical energy (Na, S) and stored in the form of chemical energy (Na, S). When discharging, sodium and sulfur form sodium polysulfide through an electrochemical reaction t...

AI Technical Summary

Problems solved by technology

However, the added heat insulation board increases the thickness of the heat insulation layer to a large extent, so that the effective use space of the incubator is seriously reduced

In addition, since the formation of a vacuum layer between the inner and outer walls requires very high coordination precision in terms of mechanical design and sealing to increase the degree of vacuum, it is difficult to manufacture vacuum incubators, and at the same time, maintenance of high vacuum degrees is often difficult. There is a lot of difficulty, which makes the price of the incubator very expensive, and the assembly of the module itself will become difficult; in addition, when the single battery inside the module is damaged, it is also necessary to worry about the damage of the vacuum layer. After the damage, the incubator cannot be effectively insulated, causing the incubator to fail and the temperature field is severely uneven, and the battery will eventually fail to work

Images