48results about How to "Inhibit thermal runaway" patented technology

A lithium secondary battery wherein thermal runaway due to short circuit within the battery can be suppressed. In this lithium secondary battery, a positive electrode (3) having a positive electrode active material for adsorbing and discharging lithium ions, a negative electrode (4) for adsorbing and discharging lithium ions, a dummy positive electrode (6) connected to a positive electrode terminal, and a dummy negative electrode (7) connected to a negative electrode terminal are laminated alternately. A dummy laminate (9) having a short circuit separator (8) for insulation between the dummy positive electrode (6) and the dummy negative electrode (7) is also provided and laminated on the outside of the positive electrode (3) and the negative electrode (4) laminated alternately.

The invention discloses a high-protection-level air-cooled lithium battery pack thermal management system and method. The system comprises one or more layers of batteries and / or battery modules in thebattery pack, a battery pack shell and an external air cooling module, wherein the battery and / or the upper surface and / or the lower surface are / is attached to a micro heat pipe array, the part attached to the surface of the battery and / or the battery module is an evaporation section, at least one end of the micro heat pipe array extends out of the surface of the battery and / or the battery module, and the extending part serves as a condensation section to be attached to a battery pack shell; the battery pack shell surrounds the battery pack and is of a closed structure, and at least the position, corresponding to the condensation section, of the battery pack shell is provided with a heat conduction partition plate; the external air cooling module is tightly attached to the outer surface of the face, provided with the heat conduction partition plate, of the battery pack shell, air cooling fins are arranged in the external air cooling module, and a fan is arranged on the side face of the external air cooling module. The heat dissipation efficiency is high, the risk of liquid pollution is avoided, and the protection level is high.

An object of the present invention is to provide a non-aqueous lithium storage device capable of suppressing excessive decomposition of a lithium compound remaining in a positive electrode, suppressing gas generation at high voltage, and suppressing capacity reduction during high-load charge-discharge cycles. The non-aqueous lithium storage element of the present embodiment includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte solution, the positive electrode containing a lithium compound other than an active material, the non-aqueous electrolyte solution containing lithium ions, wherein the surface of the positive electrode passes through In the element distribution image obtained by SEM‑EDX, the area repetition rate U of the fluorine distribution image obtained by binarization based on the average value of the luminance value relative to the oxygen distribution image 1 40% or more and 99% or less.

The invention provides a double-coated lithium battery positive electrode material and a preparation method thereof. The double-coated lithium battery positive electrode material has a core-shell structure, and the chemical formula of the core material is LiNi x co y mn z o 2 , where x>0.8, y>0, z>0, x+y+z=1; the shell material is composed of two layers, wherein the inner layer is a porous fast ion conductor lithium salt, and the pores of the porous fast ion conductor lithium salt A carbon layer is deposited inside, and the carbon layer is formed by carbonization of a binder; the outer layer is a high-molecular polymer, and the positive electrode material prepared by the present invention has two coating layers on the outside, and the porous fast ion conductor enhances the conductivity, and the high The molecular film can prevent the porous fast ion conductor from corroding and falling off during the cycle, and the addition of the binder not only increases the interlayer bonding force, but also further carbonizes into a carbon layer, making the material have a higher cycle retention rate and better performance. safety performance.