3results about How to "Does not affect other performance" patented technology

The utility model belongs to the technical field of power batteries, and discloses a battery pack and an electric device. The battery pack comprises a shell, an immersion assembly, a liquid cooling assembly and at least one battery pack, the shell is provided with at least one accommodating cavity along a first direction for accommodating at least one battery pack, the battery pack comprises a plurality of battery cells which are sequentially arranged along a second direction, every two adjacent battery cells are conductively connected through a busbar, and body parts of the battery cells are hermetically connected to the bottom walls of the accommodating cavities; the immersion assembly comprises an immersion cavity, the immersion cavity is formed in the bottom wall of the accommodating cavity, an immersion medium circulates in the immersion cavity, the body part of the battery cell covers the immersion cavity, and the busbar is inserted in the immersion cavity so as to be in heat exchange connection with the immersion medium; the liquid cooling assembly is arranged in the accommodating cavity, the liquid cooling assembly is used for being in heat exchange connection with at least one side of the battery pack, and heat exchange is performed on the busbar and the battery cell body in an immersion cooling and liquid cooling manner, so that the heat exchange effect is improved, and the weight is not increased greatly.

This invention relates to a wide-temperature-range ether-based electrolyte with a customized high-voltage-resistant interface layer in alkali metal batteries, its preparation method, and its application. The wide-temperature-range ether-based electrolyte comprises a base electrolyte, an anion acceptor additive, and an anion additive containing a specific elemental alkali metal salt. The base electrolyte comprises an alkali metal salt and an ether solvent. In the wide-temperature-range ether-based electrolyte, the concentration of the alkali metal salt is 0.1–1.5 mol·L⁻¹. ‑1 The concentration of the anion acceptor additive is 0.5~5wt%, and the concentration of the alkali metal salt anion additive containing specific elements is 0.1~5wt%. Compared with the prior art, the CEI layer in the wide-temperature-range ether electrolyte of the present invention is more dense and exhibits enhanced chemical and thermal stability, effectively suppressing the positive electrode oxidation reaction and alleviating ion transport limitation, improving the high-temperature, room-temperature, and low-temperature cycle performance of the battery, and increasing the battery's service life.

The invention discloses a method for preparing a positive electrode material for a sodium ion battery, comprising the following steps: ball-milling a manganese source and a sodium source to particles with an average particle size of 10 μm, and uniformly mixing the manganese source and the sodium source to obtain a mixture; adding the mixture to the furnace of a high-temperature furnace, blowing a mixed gas into the furnace, the mixed gas consisting of an inert gas and air, the volume ratio of the inert gas to the air being (5-9): (1-5), and the flow rate of the mixed gas being 50 m / s; starting the high-temperature furnace, turning the furnace upside down, the rotation speed of the furnace being 5 turns / h, and sintering for 8-12 hours after heating to 550-850°C, to obtain a positive electrode material. By blowing a mixed gas into the furnace of the high-temperature furnace, a high-speed mixed gas collides with a manganese source and a sodium source, so that in the synthesis process of the positive electrode material, in the growth process of the crystal, adjacent grains collide, thereby generating dislocations, thereby increasing the service life of the battery in the material, and at the same time, because no other elements are added, other battery properties are not affected.