Processing Plan for Structural Components of New Energy Batteries

Processing Plan for Structural Components of New Energy Batteries

The new‑energy vehicle industry continues to evolve, with lightweight design and enhanced safety emerging as its core development trends. Power batteries are the central propulsion units of new‑energy vehicles; in addition to energy‑storage components such as cells and modules, three categories of precision aluminum structural parts—battery end plates, battery pack housings, and electronic control enclosures—serve as critical platforms that ensure the battery system’s sealing and protection, structural integrity, and integrated electronic control.

These components are all thin-walled, complex-shaped aluminum alloy structures that do not participate in energy storage. However, they are challenging to machine and demand extremely high precision, making them a key bottleneck in the mass production of new‑energy battery parts. The quality of the machined parts directly affects battery assembly accuracy, waterproof sealing performance, and the overall vehicle’s operational safety. To address these industry‑wide manufacturing challenges, DN Solutions, leveraging its expertise… DNM Series Vertical Machining Center + T Series High-Speed Tapping Center A premium equipment suite delivers a customized, mass‑production finishing solution, efficiently addressing challenges such as thin‑wall deformation, hole‑position deviations, thread defects, and poor batch-to‑batch consistency, thereby fully meeting enterprises’ needs for scalable, high‑quality production.

Battery terminal plate: ultra-thin sheet material with high-precision hole machining.

The battery end plate is the core compression‑and‑protection structure of a battery module, primarily serving to secure the cells, compress the module, and provide cushioning and vibration damping, thereby ensuring a compact and robust module architecture. This component is typically made from ultra‑thin aluminum alloy sheet, which exhibits poor rigidity and is highly prone to warping and deformation. During machining, it can easily develop out‑of‑flatness, hole‑position deviations, and stripped threads, all of which can readily lead to quality issues such as loose module assembly, inadequate sealing, and abnormal operating noises.

Dean’s custom processing procedure is clear and efficient: it employs DNM4505, DNM5705 Vertical Machining Centers , completing the precision milling of the end‑plate surface, contour finishing, and datum‑based finish machining. Thanks to the machine’s highly rigid bed structure, cutting vibrations in thin‑walled workpieces are effectively suppressed, and flatness and parallelism tolerances are tightly controlled. Coupled with… T4005, T5505 High-Speed Tapping Center Machining locating holes and mounting threaded holes, leveraging the equipment’s low‑vibration, high‑speed spindle performance, completely eliminates tapping defects in aluminum components, ensures consistent hole‑position accuracy across batch production, and meets the requirements for standardized precision assembly.

Battery pack housing: a large, thin-walled component manufactured as an integral unit to prevent deformation.

The battery pack housing is the core load-bearing and protective enclosure of a power battery system, classified as a large‑size, deep‑cavity, thin‑walled aluminum alloy component that is difficult to machine. Due to its substantial cavity span and relatively thin wall thickness, machining is prone to stress‑induced deformation, often resulting in uneven sidewalls, dimensional deviations in the cavity, and warping of the mating surfaces. These issues can readily lead to seal leakage and inadequate fit within the battery pack, thereby compromising the vehicle’s overall waterproofing and vibration‑resistance performance.

Addressing the pain points of mass production for housings, DNM6705 and DNM5705 large-travel vertical machining centers Precisely tailored to meet the machining requirements of large‑size workpieces. The machine features a highly rigid, vibration‑resistant bed paired with a proprietary layered cutting process, enabling one‑pass integrated finish machining of shell‑type cavities, side walls, mounting surfaces, and external contours, thereby minimizing cumulative errors associated with multiple setups. Subsequently, T‑series high‑speed tapping equipment is employed to machine mounting holes, cooling‑hole arrays, and sealed threaded holes, balancing machining efficiency with sealing accuracy and fully complying with vehicle‑level battery‑pack assembly safety standards.

Electrical control cabinet: Precision machining of complex cavities and dense hole patterns.

The battery electronic control enclosure serves as both the protective housing and mounting platform for the battery management system. Its internal cavity features a complex geometry with numerous steps and a dense array of holes, resulting in intricate machining processes and stringent precision requirements. Conventional machining equipment struggles to simultaneously ensure cavity flatness and hole‑position accuracy, often leading to dimensional deviations and poor thread‑alignment consistency—issues that directly compromise the installation accuracy of electronic components and the operational stability of the battery management system.

Dean employs an integrated composite machining solution: using DNM-series vertical machining centers, it completes cavity milling of box-type components, precision surface finishing, and complex‑shaped feature machining in a single setup, effectively minimizing clamping errors and boosting machining efficiency. Paired with the T‑series high‑productivity tapping centers, this system leverages rapid tool changes and high‑speed, high‑precision tapping to efficiently handle large volumes of densely spaced threaded holes, delivering high first‑pass yield and excellent part‑to‑part consistency, thereby ensuring precise assembly and stable operation of the electrical control system.

Dean Machine Tools has developed machining solutions tailored to three types of precision battery structural components, perfectly meeting the mass‑production demands of the new‑energy industry. The machines’ highly rigid structure effectively addresses deformation challenges in thin‑walled parts, while their high‑precision spindle systems ensure exceptional accuracy in hole‑positioning and thread‑cutting operations, significantly boosting first‑pass yield. Meanwhile, a centralized, multi‑process machining approach shortens cycle times, and the equipment’s quick changeover and exceptional flexibility enable rapid adaptation to iterative production of parts with varying specifications. Furthermore, the entire product line has been rigorously validated through global mass‑production deployments, delivering stable performance and low maintenance costs—helping manufacturers achieve scalable cost reductions and efficiency gains.

The manufacturing processes for battery end plates, battery pack housings, and electronic control enclosures are a critical component of upgrading the quality of new‑energy battery production. Dean Machine Tools, represented by Shenming Technology, leverages a mature equipment portfolio and highly practical machining techniques to precisely address industry‑specific processing challenges, providing new‑energy battery component manufacturers with an integrated machining solution that delivers high precision, high efficiency, and exceptional flexibility, thereby continuously supporting the high‑quality development of the new‑energy sector.