Temperature control, fire prevention and explosion prevention integrated lithium battery energy storage power station and control method thereof
An energy storage power station and control method technology, applied in battery temperature control, battery isolation from its environment, secondary battery, etc., to reduce the risk of accidental leakage, improve earthquake resistance, and prevent pollution
Inactive Publication Date: 2022-07-05
DALIAN UNIV OF TECH
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Problems solved by technology
The third is to limit the development of lithium-ion battery thermal runaway in a single battery and the spread in battery packs and energy storage battery cabinets
So far, there is no energy storage power station design that uses inert gas to simultaneously control the operating temperature of lithium-ion batteries and simultaneously prevents fire and explosion
Method used
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Embodiment 1
[0029] Using a ternary lithium-ion battery with a voltage of 3.7V and 180Ah, through the thermal runaway test of the lithium-ion battery, the gas product was collected to obtain a thermal runaway gas production of 0.332m 3 . The energy storage unit is composed of 5 ternary lithium-ion batteries. The capacity of the energy storage unit is 900Ah, 3.33kWh, the weight is 15.2kg, the volume is about 7L (425×154×107mm), and the thermal runaway gas production is Vg=6×0.332m 3 =1.660m3 . The gas buffer tank 7 is designed to be a rectangular parallelepiped Vc=2.3m×2.3m×2.0m=10.58m 3 . Ignore the volume of the exhaust pipe 3 and the sealed storage cabinet 11, according to the system initial pressure P 0 =0.1MPa, it can be simply calculated that when the lithium battery energy storage unit is completely burned, the maximum static pressure in the closed system is:
[0030] P=P 0 (Vg+Vc) / Vc=0.1×(1.660+10.58) / 10.58=0.116MPa
[0031] Therefore, the above pressure is the maximum static...
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Abstract
The invention belongs to the new technical field of electric energy storage, and provides a temperature control, fire prevention and explosion prevention integrated lithium battery energy storage power station and a control method thereof. The method comprises the following steps of: establishing a sealed circulating system which takes fire-proof, explosion-proof and electrically insulated inert gas as a working medium, respectively placing a plurality of lithium battery energy storage units in an explosion-proof sealed cabinet, and connecting the explosion-proof sealed cabinet into the circulating system; and the temperature of the lithium battery is adjusted by controlling the temperature and the flow of gas flowing through each sealed cabinet. When the lithium battery has an explosion combustion accident, the system function is quickly switched by controlling the valve, the smoke of the lithium battery is hermetically collected under the protection of inert gas, and the combustible smoke is prevented from continuing to explode and combust. The method has the following advantages: (1) the working temperature of the lithium battery of the energy storage power station is in an optimal state; and (2) combustible smoke generated by thermal runaway of the lithium battery is isolated from the atmosphere, so that ignition and explosion are prevented. And (3) the device can be matched with electrical and fire-fighting automatic control more easily, and is suitable for construction of large-scale energy storage power stations.
Description
technical field [0001] The invention belongs to the new technical field of electric energy storage, and relates to a lithium battery energy storage power station integrated with temperature control, fire prevention and explosion protection and a control method thereof. Background technique [0002] Energy storage is an important link in energy reform and the construction of a diversified clean energy supply system. As an electrochemical energy storage method, lithium-ion battery energy storage is developing rapidly around the world. By the end of 2020, the installed capacity of lithium-ion battery energy storage in the world has reached 13.1GW, and the installed capacity of lithium-ion battery energy storage in China has reached 2902MW. With the large-scale application of lithium-ion power stations, the safety risks of lithium-ion battery energy storage power stations are prominent. Conditions such as external overheating, collision, extrusion, overcharging, and internal s...
Claims
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IPC IPC(8): H01M10/613H01M10/62H01M10/633H01M10/6563H01M50/24H01M50/30H01M50/383H02J15/00
CPCH01M10/613H01M10/62H01M10/633H01M50/24H01M50/30H01M50/383H01M10/6563H02J15/00
Inventor 李羽白李晓杰
Owner DALIAN UNIV OF TECH