Method and system for monitoring thermal management and fire alarm of lithium battery energy storage system
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An energy storage system and fire early warning technology, applied in fire alarms, secondary batteries, secondary battery repair/maintenance, etc.
Active Publication Date: 2019-02-12
CHINA ELECTRIC POWER RES INST +1
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At present, there is no battery monitoring method that combines thermal management of lithium batteries with fire warning
Method used
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Embodiment 1
[0043] figure 1 It is a flowchart of a method for thermal management and fire warning of a lithium battery energy storage system according to a preferred embodiment of the present invention. like figure 1 As shown, the method 100 for monitoring thermal management and fire warning of a lithium battery energy storage system in this preferred embodiment starts from step 101 .
[0044] In step 101, the temperature T and the temperature rise rate S of the lithium battery energy storage system are collected in real time T ;
[0045] In step 102, when Tmin , issue a temperature control command and dissipate heat from the battery, where the Tmin is the preset temperature control lower limit;
[0046] In step 103, when T min ≤Tmax When , an instruction to disconnect the battery grid and temperature control is issued, the energy storage system connected to the grid is disconnected, and the battery is dissipated at the same time, wherein, the T max is the preset temperature control ...
Embodiment 2
[0070] image 3 It is a flowchart of a method for thermal management and fire warning of a lithium battery energy storage system according to another preferred embodiment of the present invention. like image 3 As shown, the method 300 for monitoring thermal management and fire warning of a lithium battery energy storage system described in this preferred embodiment starts from step 301 .
[0071] In step 301, set the temperature control lower limit T min 60°C, temperature control upper limit T max is 150°C, set the upper limit of the temperature rise rate S Tmax 10°C / min, set the vent air pressure threshold P max 1.1-1.3 times the local atmospheric pressure.
[0072] In step 302, the temperature T and the temperature rise rate S of the lithium battery energy storage system are collected in real time T ;
[0073] In step 303, when T<60°C, issue a temperature control command and dissipate heat from the battery;
[0074] In step 304, when 60°C≤T<150°C, issue an instructi...
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Abstract
The invention provides a method and system for monitoring thermal management and fire alarm of a lithium battery energy storage system. The method and the system are used for judging whether to carryout temperature control measures such as heat dissipation, whether to disconnect a power grid, whether to give off a fire alarm and start fire extinguishing measures and whether to start explosion-proof measures according to the information of temperature and pressure and the comparison of previously set threshold values by collecting the information of temperature and pressure of a lithium battery energy storage system, the method and the system are used for combining the thermal management of the lithium battery energy storage system with the fire alarm, and the problem of joining the thermal management in the normal range of the lithium battery energy storage system and the fire alarm in an out-of-control condition of a battery is relatively well solved.
Description
technical field [0001] The present invention relates to the technical field of lithium batteries, and more specifically, to a method and system for monitoring thermal management and fire warning of a lithium battery energy storage system. Background technique [0002] Lithium batteries have been used more and more due to their advantages of high working voltage, small size, light weight, high energy, no memory effect, no pollution, small self-discharge, long cycle life, and no pollution. Lithium batteries are widely used in energy storage power systems such as hydraulic power, fire power, wind power and solar power stations, uninterruptible power supplies for post and telecommunications, as well as power tools, electric bicycles, electric motorcycles, electric vehicles, military equipment, aerospace and other fields. [0003] However, lithium batteries also have their own disadvantages. For example, when the charging voltage of a lithium battery is higher than its rated volt...
Claims
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Application Information
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