CATL-ATL joint venture specializing in residential, C&I, and data center energy storage. Uses proprietary Kunlun LFP cells with 15,000-cycle lifespan and pioneered mass-produced semi-solid-state LFP cells with 32 GWh annual production capacity.
ISO 9001ISO 14001
📍 Xiamen, China
Est. 2021
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#2 global battery manufacturer with vertically integrated BESS from Blade LFP cells to DC and AC block systems. Haohan is the flagship utility-scale DC block up to 14.6 MWh; Chess Plus covers C&I applications.
ISO 9001ISO 14001ISO 45001
📍 Shenzhen, China
Est. 1995
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Chinese Tier 1 LFP cell manufacturer listed on the Hong Kong Stock Exchange. Produces high-capacity LFP cells and containerized BESS for utility-scale energy storage with 100 GWh annual capacity.
ISO 9001ISO 14001ISO 45001
📍 Changzhou, China
Est. 2007
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World's largest BESS battery manufacturer by shipped capacity. Vertically integrated from LFP cell production to containerized DC block systems. Flagship TENER platform claims zero degradation over first five years.
ISO 9001ISO 14001ISO 45001
📍 Ningde, China
Est. 2011
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CATL-invested energy storage company offering LFP cells, containerized BESS, and C&I storage systems with liquid cooling and DC bus architecture.
📍 Fujian, China
Est. 2019
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Canadian-Chinese solar and energy storage company with dedicated e-STORAGE subsidiary. Manufactures own LFP cells and utility-scale SolBank DC block systems.
📍 Guelph, Canada
Est. 2001
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Subsidiary of Hengxin Auto Group, ranked top 7 globally in ESS battery shipments. LFP cells (100–588Ah) and DC blocks up to 6.26 MWh. Datasheets available.
IATF 16949ISO 9001
📍 Xiaogan, China
Est. 2021
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Tier 1 battery manufacturer operating the world's largest dedicated BESS factory (60 GWh in Jingmen). Produces LFP cells (628Ah 'Mr. Big') and containerized DC block systems with CTP technology. Also developing sodium-ion BESS.
ISO 9001ISO 14001ISO 45001
📍 Huizhou, China
Est. 2001
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Top 4 global BESS integrator (Wood Mackenzie) and BloombergNEF Tier 1 manufacturer with 30+ GWh deployed across 300+ projects. Gen 8 Scalable Platform features proprietary 750Ah+ LFP cells in modular 10-foot units supporting 6-12+ MWh configurations with 440+ Wh/L energy density.
ISO 9001ISO 14001ISO 45001
📍 Shanghai, China
Est. 2007
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Chinese lithium mining and battery group with vertically integrated BESS division. Over 21 GWh deployed globally, offering LFP cells and containerized energy storage systems up to 10 MWh.
📍 Xinyu, China
Est. 2000
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Volkswagen-backed Chinese battery manufacturer developing next-generation LMFP cells alongside LFP. Expanding into Europe and North America with GWh-scale BESS projects.
ISO 9001ISO 14001ISO 45001
📍 Hefei, China
Est. 2006
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Chinese battery manufacturer listed on the Shenzhen Stock Exchange (300438) with 8 production bases and capacity exceeding 100 GWh. Produces LFP cells and utility-scale BESS systems.
📍 Guangzhou, China
Est. 2001
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Fast-growing LFP cell and DC block manufacturer. Vertically integrated from ∞Cell (280–1,300Ah) to ∞Block/∞Power containerized systems up to 6.9 MWh. 50 GWh capacity, 10 GWh US plant. Datasheets available.
ISO 9001ISO 14001ISO 45001
+1 more
📍 Xiamen, China
Est. 2019
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Energy storage division of JinkoSolar and BNEF Tier 1 manufacturer, offering utility-scale and C&I battery energy storage systems built on in-house LFP cell technology. SunTera containers deliver up to 6.25 MWh per 20ft unit with 10,000+ cycle life.
ISO 9001ISO 14001ISO 45001
📍 Shanghai, China
Est. 2022
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Global Tier 1 battery manufacturer and major BESS cell supplier expanding into LFP for utility storage alongside NMC. Operates gigafactories in South Korea, Poland, the USA, and China.
ISO 9001ISO 14001ISO 45001
📍 Seoul, South Korea
Est. 2020
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Chinese state-backed battery cell manufacturer and one of the earliest companies in China to enter energy storage (since 2010). Produces LFP and NMC prismatic cells and 5 MWh liquid-cooled containerized BESS with 31 GWh annual production capacity.
ISO 9001ISO 14001
📍 Tianjin, China
Est. 1997
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Vertically integrated energy storage company manufacturing LFP cells (280Ah to 783Ah solid-state) and containerized BESS up to 8.3 MWh per unit. Over 8 GWh installed globally across 40+ countries with 260+ safety certifications and pioneering solid-state battery technology.
ISO 9001ISO 14001ISO 45001
📍 Hangzhou, China
Est. 1994
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Leading modular LFP battery system manufacturer for C&I and utility-scale BESS. Container-based L-series and PowerCube rack systems are deployed across European and APAC markets.
ISO 9001ISO 14001ISO 45001
📍 Shanghai, China
Est. 2009
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BloombergNEF Tier 1 energy storage manufacturer that expanded from solar into comprehensive BESS solutions through subsidiary SYL Battery. Offers vertically integrated products spanning LFP cells, modules, PCS, and containerized systems with 15 GWh+ annual production capacity.
ISO 9001ISO 14001ISO 45001
📍 Ningbo, China
Est. 1986
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Chengdu-based company listed on the Shanghai STAR Market that expanded into LFP energy storage battery production in 2022. Manufactures lithium battery cells and modules for residential and C&I energy storage applications with 196 patents.
ISO 14001
📍 Chengdu, China
Est. 2005
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French battery manufacturer and TotalEnergies subsidiary specializing in high-reliability BESS for industrial and grid applications. Intensium Max+ is their flagship utility-scale BESS container.
ISO 9001ISO 14001ISO 45001
📍 Paris, France
Est. 1918
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Korean Tier 1 battery cell manufacturer and supplier producing NCA cells for utility-scale BESS. SBB (Samsung Battery Box) DC blocks deliver up to 5.259 MWh per 20ft container with liquid cooling.
ISO 9001ISO 14001ISO 45001
📍 Suwon, South Korea
Est. 1970
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BloombergNEF Tier 1 energy storage manufacturer with vertically integrated LFP cell production (102Ah to 684Ah) and containerized BESS systems. NoahX 3.0 delivers 6.528 MWh per 20ft container with 15,000+ cycle life and AI-based active balancing.
ISO 9001ISO 14001ISO 45001
📍 Shenzhen, China
Est. 1997
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Trina Solar's energy storage division offering vertically integrated BESS with in-house LFP cells. BNEF Tier 1 with over 20 GWh shipped globally.
📍 Changzhou, China
Est. 1997
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Overview
What is a Battery Cell?
A battery cell is the fundamental electrochemical unit in a Battery Energy Storage System. Each cell converts chemical energy to electrical energy through reversible electrochemical reactions. Cells are assembled into modules, which are then integrated into racks and enclosures (DC blocks or AC blocks) to form complete storage systems.
In utility-scale and C&I BESS, lithium iron phosphate (LFP) cells dominate due to their safety profile, long cycle life, and cost-effectiveness. Some manufacturers also produce nickel manganese cobalt (NMC) cells for applications requiring higher energy density, and sodium-ion cells are emerging as an alternative for shorter-duration storage.
Key Specifications
What to compare when evaluating battery cells
When shortlisting battery cell suppliers for a BESS project, these are the key technical specifications EPCs, developers, and system integrators typically evaluate:
Cell Chemistry
LFP, NMC, LMFP, Sodium-ion
LFP dominates utility-scale BESS; NMC for higher density, sodium-ion emerging
Cell Format
Prismatic, Cylindrical, Pouch
Prismatic dominates utility-scale; cylindrical and pouch used in some C&I
Cell Capacity
100 – 1,200 Ah
Trend toward higher capacity cells to reduce connections per module
Cycle Life
6,000 – 12,000+
At rated depth of discharge; higher cycle life reduces levelized cost
C-rate / P-rate
0.5C – 2C
Defines charge/discharge power relative to capacity; higher C-rate for peaking applications
Certifications
UL 9540A, IEC 62619
UL 9540A for thermal runaway safety, IEC 62619 for battery safety
FAQ
Frequently Asked Questions
What battery chemistry is most common for utility-scale BESS?
LFP dominates due to safety, long cycle life, and lower cost per cycle. NMC is used where higher energy density is required. Sodium-ion is emerging as an alternative for shorter-duration applications.
What cell format is used in BESS projects?
Prismatic cells are the dominant format for utility-scale and C&I BESS. They offer higher capacity per cell, simpler module assembly, and better thermal management compared to cylindrical or pouch formats.
How does cell capacity affect system design?
Higher-capacity cells (314 Ah, 587 Ah, and above) reduce the number of cells and connections per module, simplifying assembly, reducing points of failure, and lowering manufacturing cost. The trade-off is that larger cells require more sophisticated thermal management.
What certifications do BESS battery cells need?
Battery cells for energy storage require IEC 62619 (safety of secondary lithium cells), UN 38.3 (transport testing), and IEC 62660 (performance testing). Additional regional certifications like UL 1973 (North America) and KC (South Korea) may be needed depending on the target market.