Upgrade of New Energy Vehicle Industrial Chain, TiN Coated Taps Assist Battery Shell Precision Machining

With increasing global attention on sustainable development and environmentalprotection, the New Energy Vehicle (NEV) industry is experiencing unprecedentedrapid growth. As the core component of NEVs, batteries directly impact the vehicle'srange, safety, and cost. Precision machining of battery housings is a critical step inensuring the performance and safety of battery packs. This article will delve into theupgrading trends of the NEV industry chain and highlight the significant role andtechnical advantages of TiN-coated taps in the precision machining of batteryhousings.

1. The Rise of the New Energy Vehicle Industry andSupply Chain Upgrades

The global New Energy Vehicle (NEV) market is expanding at an astonishing pace.According to market forecasts, the battery tray market is projected to reach USD 9.08billion by 2026 and is expected to hit USD 32.049 billion by 2035, demonstrating asignificant compound annual growth rate [1]. This growth is primarily driven bygovernment policy support, increasing consumer environmental awareness, andcontinuous advancements in battery technology. The upgrading of the NEV industrychain is reflected in several aspects:

• Material Innovation: Battery materials are evolving from traditional liquid-statelithium-ion batteries to new types such as solid-state and semi-solid-statebatteries, imposing higher demands on battery housing material properties, suchas lightweight, high strength, and corrosion resistance.

Manufacturing Process Optimization: To meet the demands for battery energydensity and safety, battery pack integration is becoming increasinglysophisticated, posing severe challenges to the precision and efficiency ofmanufacturing processes.

Intelligence and Automation: The enhancement of intelligence and automationlevels in production lines aims to improve manufacturing efficiency, reducecosts, and ensure product quality consistency.

2. The Critical Role of Battery Housings in New Energy Vehicles

Battery housings are not merely external protective layers for batteries; they arecrucial for ensuring the safety, performance, and lifespan of the battery system. Theirprimary functions include:

•  Structural Support: Bearing the weight of the battery pack and externalimpacts, ensuring battery stability during vehicle operation.

• Thermal Management: Effectively dissipating heat to maintain the batterywithin its optimal operating temperature range, preventing overheating orovercooling from affecting battery performance and lifespan.

• Safety Protection: Isolating the battery from the external environment,preventing moisture and dust ingress, and providing physical protection duringcollisions to avoid battery damage leading to safety incidents.

• Electromagnetic Shielding: Reducing electromagnetic interference to ensurethe normal operation of the Battery Management System (BMS).

  
  

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Battery housings are typically manufactured from lightweight materials such asaluminum alloys. These materials often present challenges during machining, such astool adhesion and chip evacuation difficulties, demanding higher performance fromcutting tools.

3. TiN-Coated Taps Facilitating Precision Machining of Battery Housings

In the precision machining of battery housings, the quality of threaded holes isparamount. Traditional taps, when machining materials like aluminum alloys, oftenencounter issues such as chip adhesion, reduced thread accuracy, and short tool lifedue to the material's stickiness. TiN (Titanium Nitride) coated taps, with their uniqueadvantages, have become an ideal choice for overcoming these challenges.

Technical Advantages of TiN-Coated Taps:

• High Hardness and Wear Resistance: The Titanium Nitride (TiN) coatingpossesses extremely high hardness (approximately 2000 HV) and excellent wear resistance [2], significantly extending the tap's service life and reducing toolchange frequency.

• Low Coefficient of Friction: TiN coating effectively reduces the frictioncoefficient between the tap and the workpiece, minimizing cutting heatgeneration, thereby effectively preventing chip adhesion and improvingmachined surface quality [2].

• Excellent Chip Evacuation Performance: TiN-coated taps, often combined withoptimized flute designs, can evacuate chips more smoothly, avoiding chipclogging and secondary cutting, performing exceptionally wellin deep holemachining.

• Improved Machining Efficiency and Accuracy: Longer tool life and stablemachining performance enable production lines to achieve higher machiningspeeds and more consistent thread accuracy, meeting the stringent precisionrequirements for NEV battery housings.

• Broad Applicability: TiN-coated taps are suitable not only for aluminum alloysbut also for various other non-ferrous metals and some steels, offering goodversatility.

For instance, the TiN-coated self-locking taps provided by Dongguan Nalong CuttingTools Co., Ltd. offer effective solutions for issues such as chip adhesion and insufficientthread strength when tapping aluminum alloys in motor housings and battery trays[3].

The rapid development of the New Energy Vehicle industry places higher demands onthe precision machining of battery housings. TiN-coated taps, with their exceptionalhardness, wear resistance, low coefficient of friction, and excellent chip evacuationperformance, demonstrate immense potential in addressing the challenges ofmachining lightweight materials like aluminum alloys. By adopting advanced TiN-coated tap technology, it is possible not only to significantly improve the machiningquality and efficiency of threaded holes in battery housings but also to effectivelyreduce production costs, providing strong technical support for the continuousupgrading of the NEV industry chain. In the future, as NEV technology continues toevolve, the demand for precision machining tools will become even stronger, andhigh-performance cutting tools like TiN-coated taps will play an increasingly vital role.

[1] MarketGrowthReports. (2025, December 15). Battery Tray Market Size, Trends,Growth / 2035 Report. Retrieved from https://www.marketgrowthreports.com/market-reports/battery-tray-market-102649   [2] Mercury Gauge. Tap Treatments. Retrievedfrom https://www.mercury-gauge.com/gauge-manufacturers-and-suppliers/tap-treatments/  [3]东莞市林弘精密切削工具有限公司.Retrieved from http://www.zuangong.com.cn