Lithium Battery Energy Storage Systems (BESS)
A lithium battery energy storage system is a stationary electrochemical energy storage system primarily based on prismatic lithium iron phosphate (LFP) cells. It stores electrical energy in chemical form and releases it on demand. BESS is a core technology for photovoltaic and wind power integration, end-user electricity cost optimization, backup power for AI computing centers, and grid peak shaving.
LFP Technology and System Integration
More than 95% of the global energy storage market currently adopts LFP (lithium iron phosphate) battery technology. Compared with ternary lithium batteries, LFP batteries offer higher thermal stability, longer cycle life, cobalt- and nickel-free chemistry, and more controllable costs. These characteristics make them particularly suitable for energy storage applications involving long-term, shallow charge and discharge cycles.
A complete BESS is integrated through multiple levels: battery cells → battery modules → battery packs → energy storage cabinets / prefabricated energy storage containers. The system also incorporates a Battery Management System (BMS), Power Conversion System (PCS), Energy Management System (EMS), thermal management, and fire protection to form a complete energy storage solution.
Key functions include time-shifted energy consumption, power support, emergency backup power, and renewable energy utilization.
Major Application Areas of Lithium Battery Energy Storage
- AIDC Backup Power and Energy Storage: Integrated energy storage solutions for AI data centers and high-performance computing facilities.
- Commercial and Industrial Energy Storage (C&I Energy Storage): Solutions for electricity cost optimization, peak shaving, load management, and backup power in commercial and industrial facilities.
- Residential Energy Storage (Residential ESS): Home energy storage solutions for solar power utilization, household electricity management, and backup power.
Critical Role of Injection-Molded Components in BESS
Injection-molded components used in energy storage battery modules, battery packs, BMS assemblies, and PCS units are essential to system safety, reliability, and structural integrity. These components include internal insulation parts, structural supports, electrical isolation components, protective housings, and sealing components.
Key Technical Requirements
- Flame Retardancy: UL 94 V-0 flame-retardant rating.
- Halogen-Free Formulations: Halogen-free materials to meet relevant environmental and safety requirements.
- Electrical Insulation: High Comparative Tracking Index (CTI) for improved resistance to electrical tracking.
- Temperature Resistance: Reliable performance under the thermal conditions encountered in energy storage systems.
- Low-Smoke Performance: Reduced smoke generation to support applicable fire safety requirements.
- UL Certification: UL Yellow Card documentation is required for overseas projects where specified by project requirements and applicable certification standards.
Manufacturing Processes
- Precision Injection Molding
- Insert Molding
Taizhou Sanding Molding Co., Ltd., established in November 2007, with Wang Tongliang as its legal representative and a registered capital of 2.28 million yuan, is located at No. 1188 Qihang Road, Sanjia Street, Taizhou Bay New Area, Taizhou City, Zhejiang Province, covering an area of 28,000 square meters. It is a private manufacturing enterprise with nearly 20 years of experience in the molding industry. The company currently has over 100 employees, including 5 professional technicians, 18 administrative personnel, and over 70 production staff. In 2023, it completed customs import and export registration, possessing independent import and export qualifications. Its current operations are stable, with standardized social security coverage and compliant operations.
Regarding core qualifications and technical strength, the company has been recognized as a National High-tech Enterprise, a Science and Technology-based SME, and an Innovative SME. As one of the drafting units of the national standard for battery plastic casings, it passed ISO9001 quality management system certification in 2008, holds 7 qualification certificates and 5 administrative licenses, and has established a standardized production and quality control system. The company possesses an independent mold design and development team and a complete set of mold processing equipment, accumulating deep expertise in the field of battery shell molds. With the technical support of the Taizhou Plastics Research Institute (a Taizhou partner of the Institute of Materials Technology and Engineering, Chinese Academy of Sciences), it has successfully overcome application challenges related to high-temperature resistant ABS and high-temperature flame-retardant ABS materials. As of December 2025, the company held a total of 43 patents, demonstrating outstanding technology transfer capabilities. In terms of testing and production capacity, the company is equipped with a full set of testing facilities, capable of independently completing tests for core indicators such as impact strength, tensile strength, and flame retardancy. It owns over 60 injection molding machines ranging from 200 grams to 20,000 grams, capable of handling injection molded products weighing up to 15 kilograms per piece, with ample production capacity to flexibly adapt to diverse production needs.
The company focuses on mold manufacturing and plastic product R&D and production as its dual cores, covering the entire chain from design and R&D to production and sales. It also possesses supporting capabilities in new material technology R&D and industrial design. In 2023, the company expanded its business scope, adding technology import and export and goods import and export businesses, actively developing both domestic and international trade. The company's core products are primarily battery casings, focusing on energy storage, communication battery casings and other plastic productS, such as . It is a leading in the downstream battery industry, having supplied Huawei with high-temperature resistant and flame-retardant ABS battery casings in bulk, earning high praise from this leading client. In terms of diversified expansion, the company entered the bathroom plastic products sector in 2016, achieving mass production and serving well-known local bathroom companies in Taizhou. Simultaneously, it has expanded into furniture plastic products, daily necessities plastic parts, and pet supplies, offering a diverse product range tailored to market demands. In 2020, the company successfully won the bid for the smart toilet seat and back cover mold project from Qingdao Weixi Intelligent Technology, demonstrating its technological strength in the bathroom sector. Furthermore, the company also manufactures automotive and motorcycle parts, and plastic parts for motors and water pumps, leveraging its core molding capabilities to extend into other product categories and enhance its business resilience.
In terms of business model and development layout, the company operates primarily under the ODM/OEM model, providing customers with full-process customized services from product design to mass production and delivery. It also undertakes OEM production orders, balancing profit and capacity utilization. Simultaneously, it is steadily exploring the OBM model, developing its own brands to meet the demands of foreign trade transformation. Domestically, the company has cultivated deep roots in downstream industries such as batteries, sanitary ware, and daily necessities, accumulating stable customer resources. Internationally, it completed its registration and commenced its strategic layout in 2023, focusing on advantageous categories such as energy storage battery casings and targeting overseas new energy and daily necessities markets, possessing a solid foundation for foreign trade expansion. Leveraging the advantages of the Taizhou molding industry cluster, the company uses "precision molds + high-quality plastic products" as its core competitiveness, continuously deepening its presence in the new energy battery casing market while expanding into potential categories such as sanitary ware, daily necessities, and pet supplies. It is steadily promoting integrated domestic and international trade development, striving to become a high-quality molding supplier in its niche markets.