Battery with safety protection device

Abstract

The invention provides a battery with a safety protection device. The battery includes: a casing, wherein the casing includes a top cover and a lower casing, the top cover can be connected to the lower casing to form a battery cavity; a battery cell, wherein the battery cell is contained in the battery cavity; the safety protection device that includes a safety agent storage portion and a safety agent spraying portion, wherein the safety agent storage portion communicates with the safety agent spraying portion through a communication channel so as to convey a safety agent to the safety agent spraying portion, the safety agent spraying portion is arranged on the casing and extends into the battery cavity, and at least a part of the safety agent spraying portion inside the battery cavity ismade of a fusible material. The melting of the fusible material enables the safety agent spraying portion to spary the safety agent into the battery cavity. The safety protection device according to the present invention has a fast response speed, uses a small quantity of safety agent, and has a good cooling and fire extinguishing effect. In addition, the safety protection between battery individuals cannot affect each other and cannot cause mutual pollution.

Description

technical field [0001] The invention relates to the field of energy storage batteries, in particular to a battery with a safety protection device. Background technique [0002] The battery energy storage system used in the field of electric energy storage usually has a high energy storage capacity and high power, especially the battery energy storage system used in the fields of distributed power generation, power grid peak-shaving and valley filling, smart grid, micro-grid, etc. The energy storage capacity and working power can reach the megawatt level or more, requiring a large number of energy storage batteries to be assembled in series and parallel, so the safety requirements for batteries are very high. If safety protection measures are not adopted, when a single battery burns and explodes, it will affect the operation of the entire battery energy storage system, and even cause a major safety accident in the entire battery energy storage system. [0003] At present, in...

AI Technical Summary

Problems solved by technology

This method has the following problems: (1) In the prior art, the overall detection and monitoring of the energy storage cabinet is not accurate enough, and when the thermal runaway of a single battery occurs, it may not be detected or the detection may be slow. When a fire is detected, the fire extinguishing agent can be sprayed in the entire energy storage cabinet of the energy storage power station, and the fire can not be extinguished for the single battery in fire. The fire extinguishing effect on the single battery is not obvious, and it cannot be quickly, effectively and safely To extinguish the fire source, a single battery refers to a single cell in a single case or multiple cells connected in parallel in a single case; (2) The fire extinguishing system requires a dedicated storage bottle room and fire power supply, and needs to be connected with the detection With the cooperation of the monitoring system, complex pipeline laying is required in the case of a large protection area, which has the disadvantages of complex structure, time-consuming installation, and long detection and monitoring response time; Residues cause devastating pollution to electrical appliances, especially high-precision electrical components, leading to local short-circuits and fires, making the components in the entire energy storage cabinet unable to be reused, and all of them are damaged, resulting in a huge waste of cost

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