Safe storage and transportation bag for lithium batteries and related products

Abstract

The invention provides a safety storage and transportation bag for lithium batteries and related products. The safety storage and transportation bag comprises a fireproof heat-insulation storage and transportation bag body, a fireproof safety pressure relief opening and a temperature triggering type flame-retardant explosion-suppression and fire-extinguishing system. The storage and transportation bag body is made of fireproof heat insulation materials, and it is ensured that the external temperature is smaller than or equal to 100 DEG C when internal combustion is conducted for The fireproof safety pressure relief opening is automatically opened to relieve pressure when the internal pressure is overhigh, and flames are prevented from overflowing. The storage and transportation bag is internally provided with a two-stage fire extinguishing system: in the initial stage of thermal runaway, a nanocapsule flame-retardant explosion-suppression agent coated on the inner wall is triggered to release, and combustible gas is inerted; and in the later stage of thermal runaway, the fire extinguishing agent in the plastic bag is triggered and released to quickly extinguish open fire and cool. The device can effectively restrain the fire risk caused by thermal runaway of the lithium battery, has the functions of pressure releasing, flame blocking and active fire extinguishing, and is suitable for safe storage and transportation of the lithium battery and related products such as a mobile phone, a power bank and a tablet personal computer.

Description

Technical Field

[0001] The present invention relates to a safety protection technology for lithium batteries and related products, and in particular to a safety storage and transportation bag for automatically extinguishing fires of lithium batteries and related products when they spontaneously combust during storage and transportation. Background Art

[0002] With the widespread use of mobile electronic devices, lithium batteries such as batteries, power banks, mobile phones, tablet computers and related products are at risk of spontaneous combustion and thermal runaway during storage and transportation. Once spontaneous combustion occurs, if the fire source cannot be extinguished in a timely and localized manner, the flames will quickly ignite surrounding objects, causing the fire to spread and triggering serious fire accidents. At present, the fire safety measures for lithium batteries and related products during storage and transportation are still imperfect. The existing storage and transportation methods cannot effectively prevent the spread of flames and heat when lithium batteries spontaneously combust, and it is difficult to perform flame retardant, explosion suppression and fire extinguishing treatments in time at different stages of thermal runaway of lithium batteries, and cannot provide reliable guarantees for the safe storage and transportation of lithium batteries and related products. Therefore, there is an urgent need for a storage and transportation equipment that can effectively solve the above problems. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the present invention provides a safe storage and transportation bag for lithium batteries and related products. The specific technical solution is as follows: A safe storage and transportation bag for lithium batteries and related products, comprising: a storage and transportation bag body, the bag opening of which can be opened for placing lithium batteries and related products, and the bag opening can be closed, and a fire safety pressure relief port is provided on the storage and transportation bag body. When a lithium battery thermal runaway and spontaneous combustion occurs inside the storage and transportation bag, the internal pressure increases, the fire safety pressure relief port opens, and the internal pressure is released. At the same time, due to its fireproof structural design, it can prevent the flame from spreading to the outside.

[0004] Furthermore, the storage bag body has fireproof and heat-insulating capabilities and is made of special fireproof and heat-insulating materials. When internal combustion occurs for 30 minutes, the external temperature of the storage bag does not exceed 100 degrees. This material can effectively prevent the flame from burning the storage bag and can greatly hinder the transfer of heat, thereby avoiding damage to the surrounding environment and personnel.

[0005] Furthermore, the storage and transportation bag body is provided with flame retardant and explosion suppression agents and fire extinguishing agents, and the release of these agents is triggered by temperature. When the lithium battery is in the early stage of thermal runaway and releases combustible gas to form a mixture with oxygen, the temperature in the early stage of thermal runaway triggers the release of flame retardant and explosion suppression agents, inerting the mixture so that it cannot be ignited, thereby suppressing the occurrence of fire from the source; when the temperature is in the late stage of thermal runaway of the lithium battery and an open flame is generated, the fire extinguishing agent can be quickly released to extinguish the battery fire and quickly reduce the battery temperature, effectively preventing the fire from rekindling and spreading to the surrounding area.

[0006] Furthermore, the flame retardant and explosion suppression agent is wrapped by nanocapsules and coated on the inner wall of the storage and transportation bag.

[0007] Furthermore, the fire extinguishing agent is filled in a plastic bag inside the storage and transportation bag body, and the plastic bag is filled with compressed nitrogen in addition to the fire extinguishing agent.

[0008] The beneficial effects of the present invention are: (1) The storage and transportation bag of the present invention is provided with a fireproof safety pressure relief port, which can safely release the pressure when the internal pressure increases due to thermal runaway and spontaneous combustion of the lithium battery, while preventing the flame from escaping, thereby ensuring safety during storage and transportation; (2) Its excellent fireproof and heat-insulating properties ensure that the storage and transportation bags will not be burned and the external temperature will not be too high during the long period of spontaneous combustion of lithium batteries, thus avoiding threats to surrounding objects and personnel and buying more time for rescue and treatment; (3) The temperature-triggered flame retardant and explosion suppression agents and fire extinguishing agents installed inside can effectively intervene in different stages of thermal runaway of lithium batteries, from suppressing the combustion of combustible gases to extinguishing open flames and lowering temperatures, comprehensively ensuring the safety of lithium batteries and related products during storage and transportation, and greatly reducing the possibility and degree of harm caused by fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A front view of a safe storage and transportation bag for lithium batteries and related products.

[0010] Figure 2 A partial view of the opening of a safe storage and transportation bag for lithium batteries and related products.

[0011] In the figure: storage and transportation bag body 1, fire safety pressure relief port 2, filter 3, zipper 4, bag opening 5, plastic bag 6, storage and transportation bag inner wall 7. DETAILED DESCRIPTION

[0012] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0013] like Figure 1 As shown, a safe storage and transportation bag for lithium batteries and related products includes: a storage and transportation bag body 1, a fire safety pressure relief vent 2 and a zipper 4. The storage and transportation bag body 1 is made of materials with high strength, high temperature resistance, and excellent fire and heat insulation properties, such as ceramic fiber composite materials, aerogel composite materials, etc., and is made through a special processing technology. During the production process, the size and shape of the storage and transportation bag are determined according to actual needs to adapt to lithium batteries and related products of different specifications.

[0014] In this embodiment, the bag opening of the storage and transportation bag body 1 adopts a zipper design, and the zipper 4 is a double-layer zipper, which can ensure that it can be tightly closed after placing lithium batteries and related products, preventing external air, moisture, etc. from entering the storage and transportation bag, and also preventing internal substances from leaking.

[0015] In this embodiment, the bag body 1 is provided with a fire safety pressure relief vent 2, which can be a bursting disc, fusible plug, or other structure. When the internal pressure of the bag body 1 reaches a set value or the temperature reaches a certain level, the fire safety pressure relief vent 2 automatically opens to release the internal pressure. At the same time, the filter 3 and other structures within the bag body 1 effectively prevent the escape of flames and sparks.

[0016] In this embodiment, the flame retardant and explosion suppression agent is wrapped by nanocapsules and coated on the inner wall 7 of the storage bag. The fire extinguishing agent is filled in the plastic bag 6 inside the storage bag body 1. In addition to the fire extinguishing agent, the plastic bag 6 is also filled with compressed nitrogen. The fire extinguishing agent can be perfluorohexanone or a lithium battery-specific fire extinguishing agent. These agents are all triggered to release by temperature. When the lithium battery is in the early stage of thermal runaway, combustible gas is released to form a mixture with oxygen. The nanocapsules are triggered to rupture at the initial temperature of thermal runaway to release the flame retardant and explosion suppression agent, inerting the mixture so that it cannot be ignited, thereby suppressing the occurrence of fire from the source; when the thermal runaway of the lithium battery develops to the later stage and produces open flames, the plastic bag is baked by the flame and quickly ruptures to release the fire extinguishing agent to extinguish the battery fire, and quickly reduce the battery temperature, effectively preventing the fire from re-igniting and spreading to the surrounding area.

Claims

1. A safe storage and transportation bag for lithium batteries and related products, characterized in that: include: The storage and transportation bag body 1 has a bag opening 5 that can be opened to place lithium batteries and related products, and is closed by a zipper 4; a fire safety pressure relief vent 2 is provided on the storage and transportation bag body 1, which is used to release pressure and prevent flames from escaping when the internal pressure increases; the storage and transportation bag body 1 is made of fireproof and heat-insulating material, and maintains an external temperature of ≤100°C when the internal combustion is 30 minutes; the flame retardant and explosion-suppressing agents and fire extinguishing agents set inside the storage and transportation bag are released by temperature triggering.

2. The safety storage and transportation bag according to claim 1, characterized in that: A fireproof filter 3 is provided inside the fireproof safety pressure relief vent 2 to prevent flame particles from passing through.

3. The safety storage and transportation bag according to claim 1, characterized in that: The flame retardant and explosion suppression agent is wrapped by nanocapsules and coated on the inner wall 7 of the storage bag. The nanocapsules are heated and ruptured at the temperature of the initial stage of thermal runaway of the lithium battery to release the flame retardant and explosion suppression agent, inertizing the mixture formed by the combustible gas and oxygen.

4. The safety storage and transportation bag according to claim 1, characterized in that: The fire extinguishing agent is encapsulated in a plastic bag 6 which is filled with compressed nitrogen. When the thermal runaway of the lithium battery develops to a later stage and generates an open flame, the plastic bag 6 is rapidly ruptured due to the flame baking to release the fire extinguishing agent.

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