Explosion-proof valve, battery pack and device
A technology of explosion-proof valves and battery packs, which is applied to battery pack parts, batteries, secondary batteries, etc., and can solve problems such as mechanical shock heat hazards of battery packs, spontaneous combustion of battery packs, and improvement of battery packs
Active Publication Date: 2021-02-02
CONTEMPORARY AMPEREX TECH CO
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Problems solved by technology
[0003] When the batteries in the battery pack undergo thermal runaway, a large amount of energy will be released to the outside, and at the same time, a large amount of high-temperature runaway gas and particle mixture will be generated, and combustion flames and / or Accompanied by high-temperature sparks, the out-of-control behavior will bring strong mechanical shock and thermal hazards to the battery pack. Security risks
Method used
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[0048] The drawings illustrate embodiments of the invention and it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms and therefore specific details disclosed herein should not be construed as limiting. , but merely as a basis for the claims and as an illustrative basis for teaching one skilled in the art to variously practice the invention.
[0049] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "plurality" is Refers to two or more (including two); unless otherwise specified or stated. The term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection, or an electrical connection, or a signal connection; "co...
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The invention provides an explosion-proof valve, a battery pack and a device. The explosion-proof valve comprises a fire-retardant member and a gas-permeable membrane. The fire-retardant member is used for being connected with a shell of the battery pack, the gas-permeable membrane is fixed to the fire-retardant member, and the battery pack can exchange gas with the outside sequentially through the fire-retardant member and the gas-permeable membrane. In the using process of the battery pack, when thermal runaway occurs in the shell of the battery pack, due to sudden increase of air pressure in the shell, the battery pack releases pressure through the explosion-proof valve, high-temperature runaway gas impacts and melts the gas-permeable membrane, and a smooth airflow channel is formed. When out-of-control products pass through the explosion-proof valve, combustion flames and high-temperature sparks are extinguished and removed after passing through the fire-retardant member, high-temperature out-of-control gas is cooled after passing through the fire-retardant member, and finally unburned out-of-control gas is directly exhausted, so that the explosion-proof valve can effectively exhaust out-of-control gas, and can achieve flame retardance, fire retardance and cooling; and spontaneous combustion of the battery pack or ignition of other combustibles is prevented, so that explosion of the battery pack is prevented.
Description
technical field [0001] The invention relates to the battery field, in particular to an explosion-proof valve, a battery pack and a device. Background technique [0002] In devices that use batteries as power sources, such as electric vehicles, when the batteries are stimulated by the external environment, such as machinery, electricity, heat, etc., there is a risk of loss of control, and even fire, explosion and other catastrophic accidents. [0003] When the battery in the battery pack is thermally runaway, it will release a large amount of energy to the outside, and at the same time generate a large amount of mixture of high-temperature runaway gas and particles, and may emit combustion flames and / or be accompanied by high-temperature sparks. The runaway behavior will bring strong mechanical damage to the battery pack. Shock and thermal hazards, such as ejected combustion flames and high-temperature sparks, will rapidly increase the temperature inside the battery pack and ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01M50/30H01M50/342H01M50/383H01M50/204
CPCY02E60/10H01M50/383H01M2200/20H01M10/613H01M10/625H01M10/65H01M50/249H01M50/209H01M50/308H01M50/392H01M50/394H01M10/6551H01M2220/20H01M50/3425
Inventor 陈小波黎贤达吴少基李婷
Owner CONTEMPORARY AMPEREX TECH CO