Abstract: A battery explosion-proof valve, a battery plug-in box and an electric apparatus are provided. The battery explosion-proof valve includes a fire-fighting medium pipeline, a housing and a piercing assembly. The fire-fighting medium pipeline has a medium outlet and a protective film connected to the medium outlet to block a fire-fighting medium in the fire-fighting medium pipeline. The housing has a cavity, a first opening and a second opening. The first opening and the second opening are communicated with the cavity. The fire-fighting medium pipeline is fitted in the first opening. The cavity is configured to be communicated with an inner cavity of a battery plug-in box through the second opening. The piercing assembly is arranged in the cavity and is movable relative to the fire-fighting medium pipeline to pierce the protective film.

Abstract: The present disclosure discloses an immersion valve assembly and an immersion-type secondary battery device with the same. The immersion valve assembly includes a fire-fighting liquid storage chamber including a fire-fighting liquid outlet facing a battery cell module; and an immersion valve. An opening/closing cooperation relationship is formed between the fire-fighting liquid outlet and the immersion valve, and the immersion valve is configured to move under the action of a gas pressure and open the fire-fighting liquid outlet when thermal runaway occurs to the battery cell module. The immersion-type secondary battery device includes a box cover, a box body, a battery core module and an immersion valve assembly that is arranged inside the box cover.

Abstract: A pole includes a pole body and an expansion material. The pole body includes a weak section, a cross-sectional area of the pole body has a lower limit value at the weak section to allow the pole body to be electrically fused at the weak section when an overload current flows through the pole body. The expansion material is arranged in the weak section, and configured to expand when an ambient temperature or a temperature of the pole body is higher than a set temperature, to allow the pole body to be broken at the weak section and to realize a breakage protection.

Abstract: A battery includes a shell having an inner cavity; a wound core assembled in the inner cavity of the shell; a column supported in the wound core, wherein the column includes a first cavity for storing a lithium-replenishing medium and a second cavity for storing a fire-fighting medium, a cavity wall of the first cavity having a first hole, and a cavity wall of the second cavity having a second hole; a first membrane configured to block the first hole, and configured to break when subjected to a first pressure, allowing the lithium-replenishing medium in the first cavity to flow into the inner cavity; and a second membrane configured to block the second hole, and configured to break when subjected to a second pressure, allowing the fire-fighting medium in the second cavity to flow into the inner cavity, the second pressure being greater than the first pressure.

Abstract: The present disclosure provides a detection system and a detection method for a composite detector, comprising a composite detector, a constant-temperature box, a smoke generator, a standard gas storage tank, a gas collection device and a laser Raman spectroscopy analyzer; the constant-temperature box is sealed, and both the composite detector and the gas collection device are arranged in the constant-temperature box; the smoke generator, the standard gas storage tank and the laser Raman spectroscopy analyzer are all arranged outside the constant-temperature box; the constant-temperature box, the smoke generator, and the standard gas storage tank are used to simulate the environment battery thermal runaway, the laser Raman spectroscopy analyzer obtains a first detection data of gas, the composite detector obtains a second detection data, by comparing and analyzing the first detection data with the second detection data, the composite detector is calibrated and a qualitative and quantitative detection result i

Abstract: The present disclosure provides a fire extinguishing system for an energy storage container which includes a fire control main engine, a cluster-level and cabin-level perfluorohexanone fire subsystem for implementing the cabin-level perfluorohexanone fire prevention, and a PACK-level water fire subsystem for implementing the water fire prevention in a battery box. According to the fire extinguishing system for an energy storage container, the present disclosure also provides a fire pre-warning control method for an energy storage container. The fire extinguishing system and the fire pre-warning control method provided by the present disclosure adopt a combined use of multi-component fire extinguishing agents and can implement a full flood irrigated PACK-level water fire prevention and a full submerged space-level perfluorohexanone fire prevention.