Energy Storage Thermal Management Tubes are fluid transport vessels for large container energy storage, industrial and commercial energy storage, and power battery energy storage liquid cooling and temperature control systems. They are divided into two categories: one is the heat exchange serpentine liquid cooling pipe that is attached to the battery cells inside the module, and the other is the external circulation pipe that connects the battery cluster and the cold and hot exchange unit in series. The core carries cooling liquid (ethylene glycol aqueous solution, insulation cooling oil) for circulation and heat exchange, playing a key role in temperature control, safety, battery life, and system operation from four dimensions.
1、 Core heat transfer: Transfer heat to achieve battery cooling/low-temperature heating
High temperature heat dissipation (summer, fast charging, full power discharge)
The battery cell continues to generate heat during charging and discharging, and the serpentine cooling tube attached to the battery cell absorbs the heat from the battery. The low-temperature coolant inside the tube continues to take away the heat and is transported to the outdoor heat exchanger for heat dissipation through external pipelines, stabilizing the battery temperature within the optimal range of 15-35 ℃. Liquid has a much higher specific heat capacity than air, and its heat dissipation efficiency is more than three times that of air cooling, making it suitable for high-capacity long-term energy storage and high-power fast charging scenarios.
Low temperature preheating (low temperature environment in northern winter)
When the ambient temperature is below 0 ℃, hot water/heating coolant circulates through the module through the pipeline, providing reverse heating to the battery to avoid capacity drop, limited charging and discharging, and lithium dendrite precipitation caused by low temperature, ensuring the normal grid connection operation of the energy storage power station in winter.
Global heat balance transport
The entire pipeline is graded to distribute the coolant flow rate, ensuring even supply of coolant to each battery cluster and module, reducing the temperature difference between cells. The industry standard can control the temperature difference of the entire cluster of cells to ≤ 3 ℃, solving the problem of uneven heating and cooling of the front, back, and upper and lower batteries in a single cluster.
2、 Ensure battery consistency and extend the service life of energy storage systems
When the temperature difference is too large, the charging and discharging rates of the battery cells are inconsistent, resulting in a barrel effect and rapid capacity decay; Uniform distribution and temperature control of pipelines, unified working environment for all battery cells, increased cycle life by 10% to 15%, and reduced the high cost of battery replacement in power plants.
Continuously removing local heat accumulation, avoiding long-term high-temperature aging of battery cells and electrolyte decomposition, reducing bulging and capacity decay rates, and meeting the design life requirements of energy storage power stations for 10-15 years.
3、 Build a strong safety defense line and suppress the chain spread of thermal runaway
Eliminate the source of local overheating and fire
The densely arranged lithium battery modules are prone to local heat accumulation, and the pipelines are closely attached to the battery cells to continuously dissipate heat, preventing single point overheating and uncontrolled heating. It is the first temperature control safety barrier for energy storage.
Block the spread of heat conduction
The serpentine cooling tubes are arranged between the battery cells to form a thermal insulation layer; Even if a single battery cell generates abnormal heat, the pipeline quickly guides away the heat, delaying and preventing high temperatures from conducting to adjacent cells, reducing the risk of chain explosion and combustion.
Fully enclosed leak proof safety structure
The pipeline is made of corrosion-resistant pipes such as stainless steel, fiberglass nylon, and PEEK, with fluororubber sealing and strict helium detection for leak detection. There is no risk of coolant leakage; Different from open air cooling, there is no risk of dust or water vapor entering the internal short circuit of the battery pack.
4、 Complete liquid cooling system fluid transportation and flow distribution function
Build a complete loop
Connect the water pump, expansion tank, heat exchanger, battery module, and temperature control valve in series to form a closed loop cycle: heat absorption and temperature rise → pipeline transportation and heat dissipation → cooling and reflux, uninterrupted heat exchange cycle.
Accurate allocation of graded traffic
The main and branch pipelines are matched according to the power of the battery cluster, with high-power clusters having high flow rates and low-power clusters having low flow rates, to avoid insufficient cooling fluid and heat dissipation failure in remote modules; The pipeline is equipped with regulating valves and dynamically adjusts the flow rate in conjunction with the BMS battery management system.
Media transportation, anti-corrosion protection
Long term transportation of ethylene glycol antifreeze and insulation coolant, the pipes are resistant to acid and alkali, low temperature, and high temperature, and do not corrode or precipitate impurities after long-term circulation, preventing pipeline blockage and heat dissipation paralysis.
