High-flying The Soaring Lithium Battery Production Capacity: How Can Water-Cooled Screw Chillers Stabilize Capacity Expansion?

Two extreme Tales: fire and water
The lithium battery industry in 2026 is like a pot of boiling oil.
Global powertrain installations reached 225 GWh in January-October 2021, a 116% year-on-year increase. China's power battery installations reached 107.5 GWh, an increase of 168.1% year-on-year. The cumulative sales of new energy vehicles reached 2.542 million units, with a market penetration rate 12.1%. Multiple agencies predict global lithium battery demand will surpass 1500 GWh by 2025, with leading companies aiming for a combined installed capacity of over 2500 GWh --approximately 600 GWh CATL, LG approximately 400 GWh and 200 GWh SVOLT.
Capacity is the only way out of this war. No capacity, no market share, no future. China Telecom aims to maintain a 30% global market share by 2025, equivalent to 450 million kilowatt-hours of shipments and 2025 kilowatt-hours of production capacity. BYD, Zhongchuang Xinhang and Guoxuan High-Tech are frantically expanding production lines. Lithium battery companies need to plan capacity three years or more in advance –because it takes 6 to 9 months to factory construction, three to 6 months to upgrade, and experience to increase capacity utilization from 75% to 92%.
Everyone is rushing forward. But few people stop to consider about it:
Who controls runaway temperatures when your production line is coating electrodes at speeds of hundreds of meters per minute, grinding materials at rates of several tons per hour, and conducting charge-discharge tests at thousands of amperes?
The answer lies in a device you may never have noticed: a water-cooled screw chiller.
It's not sexy, it's not revolutionary, and it's not going to be the focus of any press conference. But this is a bottleneck limiting the expansion of lithium battery production across the board.
'Hidden killer 'of Coating Process: 0.5°C Temperature Difference leads to huge Vastly Different Yields
The most difficult aspects of lithium battery manufacturing, according to many, are materials, formulations and electrochemistry. Wrong.
The hardest part is temperature.
The latest May 2026 industry insights report makes 2026 clear that paint temperature fluctuations are becoming an invisible variable affecting cell consistency. The uniformity of coating, adhesion and formation of dry film are extremely sensitive to temperature change. During coating process, multiple heat sources are superimposed, including rollers, adhesives and solvent evaporation areas. If not timely heat dissipation, the adhesive will solidify prematurely, resulting in fluctuating coating thickness, resulting in needle holes, stripes, uneven thickness, and even surface cracking.
What are the consequences? Production has plummeted, batch consistency has collapsed and the entire production line has been disrupted.
Crucially, current systems of coating material systems are becoming increasingly complex-highly viscous adhesives, different solvent systems, and a decreasing trend in the amount of coatings are compressing the process's "controllable window" to the extreme. Even if the temperature control precision the roller surface is slightly off, it will amplify to coating defects, causing material waste and rework costs to soar.
The core capability of a water-cooled screw chiller is ``temperature stability ''. It keeps operational fluctuations to a minimum, with temperature control precision of + -0.5°C on some high-end models. It's not just about "cooling off," it's about trading accurately and raising yields.
Kedley customized the KDS-160DLA water-cooled screw chiller for a lithium battery company that specializes in centralized cooling of high-speed grinding equipment. The high temperature between the grinding material and the body not only limits grinding efficiency, but also leads to the accumulation of finely ground material. The chiller delivers the cooling water to the grinder in time, controls the temperature of the material and the body of the machine, and prevents equipment safety accidents. The customer was so satisfied that they ordered an additional KDS-240DLA.
This is not an isolated case. In every key process of lithium battery production-coating, grinding, molding and capacity testing-the water-cooled screw chiller is like an "invisible hand," you can't feel it, but if it stops working, the entire production line will shut down.
Charging and discharging test: 40,000 hours of trouble-free operation-unlucky
The final hurdle to lithium battery production is charge-discharge testing.
It is the harshest scenario for chillers. In high-speed charge-discharge test, the battery repeatedly charge-discharge, high current, resulting in rapid accumulation of heat. If heat dissipation fails to keep up, the battery's temperature soars, distorting test data and causing short circuits and even runaway heat.
Comsen provides customized water-cooled screw chiller units for leading battery companies in the country, designed specifically to address this issue. The device uses a semi-hermetic screw compressor and intelligent frequency conversion technology, and has achieved more than 40,000 hours of continuous trouble-free operation. Temperature control accuracy ± 0.5°C in support of environmentally friendly refrigerants such as R32 and R407C that meet the requirements of EU CE certification and China's dual carbon policy.
What do you mean forty thousand hours? After nearly four-and-a-half years of continuous operation. Reliability of cooling unit is the bottom line of production capacity under the mode of ``full load and uninterrupted"of lithium battery production line. A chiller failure, causing a four-hour outage, it could cost the production line tens of thousands of batteries - 50 cents each, or tens of thousands of dollars in four hours. Shutting down twice a month would cost hundreds of thousands of dollars a year.
As a result, leading battery companies do not prioritise price when choosing a chiller, but rather its ability to run for 40,000 consecutive hours without incident.
Grinding Process: coolers, life of the entire production line
Grinding lithium battery materials is another severely underestimated "cooling-intensive" process that has been heavily underestimated.
After grinding in a single mill, the high temperature between the material and the machine rises rapidly. Not only does this heat limit grinding efficiency, but it also causes finely ground material to pile up-no matter how fine you grind it, it sticks together, rendering the grinding process ineffective.
More dangerously, the the grinding machine's body and components overheat, which can lead directly to equipment safety accidents.
Kaderley's solution uses a single water-cooled screw cooler for centralized cooling, replacing the need for separate refrigeration system for each mill. Not only does freestanding cooling lead to high equipment costs and energy consumption, but every machine can fail. By centralizing cooling, the cooler can provide cooling water at temperatures between 5°C and -40°C, as needed. The semi-hermetic compressor can accurately control its capacity and adjust it according to load change, saving 20% to 30% more energy than traditional compressors.
Let's do the math: a production line with 20 grinders could cost more than $2 million a year in electricity costs if each had its own cooling unit. Switching to a single centralized water-cooled screw chiller would save $1.4 million to $1.6 million a year in electricity costs and $400,000 to $600,000 a year in electricity bills. Three years later, that's the cost of a new chiller.
That's the real value of the lithium battery line's water-cooled screw chillers --it's not cost, it's profit. The Energy Efficiency War: A 0.5 Increase in COP Saves Millions in Electricity Costs Annually
Behind the expansion of lithium battery production lies astronomical electricity consumption.
A 500-ton water-cooled screw chiller annual operating time of 8,000 hours and an electricity price of 0.8 yuan per kilowatt-hour, which costs more than 3 million yuan. Traditional fixed-frequency devices have a COP value of only 3.5-4.0, meaning that for every $1 spent on electricity, only 3.5 to 4 mao (0.4 yuan) is actually spent on "actual cooling."
Variable-frequency water-cooled screw chillers raises that figure to 5.8 to 6.5. Raise COP from 4.0 to 6.0, and the same cooling capacity can reduce electricity costs by a one-third. Saving $1 million a year electricity costs is a lot of money.
In a photovoltaic base project in Jiangsu, conson replaced conventional air-cooled equipment with water-cooled screw chillers, which can reduce energy consumption by 30% a year and save more than 1 million yuan in electricity costs. The same logic applies to lithium battery production lines, which can save more money because they have higher cooling loads, longer operating times and more stringent temperature precision requirements.
More importantly, leading manufacturers of chillers in the country have developed technical standards for heat recovery. Waste heat generated during cooling (usually between 1.2 and 1.4 times the cooling capacity) can be recycled for domestic hot water heating, fresh air preheating and even process heating. A 500-ton chiller can recover between $300,000 and $500,000 a year waste heat. COP 6.0, heat recovery, overall energy efficiency ratio above 8.0.
This is not "icing on the cake" but a "lifeline" under pressure from the twin dual carbon"targets and energy efficiency policies. The state explicitly requires no more than 1.25 PUEs for new large data centers, and old chiller units face obsolescence. Although lithium battery production lines are not bound by polyurethane, carbon emission accounting and green factory certification have become a requirement for leading companies. The use high-COP water-cooled screw chillers is the shortest path to meet these requirements.
From "usable" to "uninterrupted": Water-cooled Screw Chillers are redefining the bottom line of Lithium-ion Battery Production Lines
If you look at the entire logic chain, you can see that the water-cooled screw chiller are not just a support link, but the ``Achilles heel"of the entire capacity expansion chain.
During coating process, it maintains a yield baseline of accuracy + -0.5°C. Waves of around 0.5 degrees Celsius can increase the coating defect rate from 1% to 5%, causing tens of millions of dollars worth of battery damage each year.
In the grinding process, the centralized cooling solution can reduce energy consumption by 20% to 30% and eliminate the failure risks of individual cooling of each mill.
During charge-discharge testing, the production line is supported to run continuously for 40,000 hours without fault and reliability. A four-hour outage of the A chiller will not only cause the loss of electricity bills, but also lead to the demise of the entire battery.
It maximises the value of electricity per kilowatt hour (kWh) across the plant with an energy efficiency ratio of 6.0 + and heat recovery technology. In today's lithium battery industry, savings in electricity costs translate directly into net profit as raw material prices continue to be squeezed.
In terms of safety, it contains a variety of protection systems, such aslow temperature antifreeze alarm, high and low pressure protection, compressor exhaust overtemperature protection, motor overtemperature protection, cold water antifreeze protection, and so on,minimizing the loss of production and temperature fluctuations caused by safety incidents.
According to data from the China Refrigeration and Air-Conditioning Industry Association, the domestic water-cooled screw chillers market size will surpass 18 billion yuan by 2028 at a compound annual growth rate of over 7.2%. The main driver is the "stringent requirements for ±0.5°C temperature control for high-heat flux processes such as semiconductors, lithium batteries and precision injection molding."
Summarize: in the age of capacity as king, cooling as king. The lithium battery industry is undergoing a profound transformation from ``expansion "to ``quality enhancement ''.
Leading companies no longer blindly pursue capacity, but "effective capacity " – capacity that is consistent with industry trends, market demand, stable production, and controlled energy consumption. By this logic, water-cooled screw chillers are no longer "auxiliary equipment" but part of production capacity itself.
You can build the largest factories, buy the most expensive coating machines and hire the most engineers. But if your chiller has a COP of 3.5, its temperature fluctuates ± 2°C and malfunctions every 4000 hours-your capacity is a number on paper, not actual output.
Behind the surge in lithium battery production, the real bottleneck has never been orders, money, equipment, but invisible temperatures.
And the water-cooled screw chiller are the "hidden champion" of strict behind-the-scenes temperature control. It won't make news, it won't be a hit with investors, but behind every offline battery, it's running in silence.
In a era when productivity is king, cooling is king. That's a quote that deserves to be engraved on the wall by every lithium battery professional.