On 15 July 2026, the Ministry of Heavy Industries (MHI) issued a global tender to select firms to set up giga-scale Advanced Chemistry Cell (ACC) battery manufacturing with a cumulative capacity of 10 GWh, earmarked for grid-scale stationary storage, under the PLI (Production-Linked Incentive) ACC scheme. For an NDA aspirant, this is an excellent springboard into battery chemistry, energy storage and electric mobility — a science-and-technology theme that also ties into energy security and the clean-energy transition.
The news in one frame
The essentials:
- What: a global tender for 10 GWh of giga-scale ACC battery manufacturing, for grid-scale storage.
- Who: the Ministry of Heavy Industries, under the PLI ACC scheme.
- ACC: Advanced Chemistry Cell — the new generation of high-energy batteries (like lithium-ion).
- Why: to build domestic battery manufacturing, cut imports, and support EVs and renewable energy.
What is an Advanced Chemistry Cell (ACC)?
Start with the term. An Advanced Chemistry Cell (ACC) is the government's name for new-generation electrochemical storage cells that store far more energy than old lead-acid batteries — most importantly lithium-ion and emerging chemistries (sodium-ion, solid-state). A "cell" is the basic unit; many cells wired together make a battery. These cells are the heart of:
- Electric vehicles (EVs) — cars, buses, two-wheelers,
- Grid storage — banking solar/wind power for when the sun isn't shining,
- Consumer electronics — phones, laptops — and defence systems (drones, portable equipment).
Because India imports most of its cells, the PLI ACC scheme (₹18,100 crore, 2021) was created to build giga-factories at home — and this tender is a further step. This clean-energy theme runs through the NDA daily current affairs.
How a battery (cell) works
The core chemistry — reliably examined — is the electrochemical cell:
- Every cell has an anode (negative electrode), a cathode (positive electrode), and an electrolyte between them.
- During discharge, a chemical reaction pushes electrons from the anode through the external circuit to the cathode — that electron flow is the electric current that powers a device. Inside, ions move through the electrolyte.
- A rechargeable (secondary) battery reverses this reaction when charged; a non-rechargeable (primary) cell cannot.
So a battery converts chemical energy into electrical energy (and back, when recharging) — a classic energy-conversion point. This links directly to the NDA physics notes on energy.
Why lithium-ion dominates
Know the workhorse chemistry:
- In a lithium-ion battery, lithium ions shuttle between a graphite anode and a metal-oxide cathode through the electrolyte during charge/discharge.
- Lithium is the lightest metal, giving lithium-ion cells a very high energy density (lots of energy for little weight) — ideal for EVs and phones.
- The 2019 Nobel Prize in Chemistry went to Goodenough, Whittingham and Yoshino for developing the lithium-ion battery.
- Key raw materials — lithium, cobalt, nickel, graphite — are critical minerals, mostly imported, which is why domestic cells and mineral security matter.
The unit of battery capacity is the watt-hour (Wh); a gigawatt-hour (GWh) = one billion watt-hours — hence "giga-scale." The revision hook: ACC = advanced high-energy cells (lithium-ion etc.); a cell = anode + cathode + electrolyte, converting chemical → electrical energy; Li-ion shuttles lithium ions, high energy density; PLI ACC (₹18,100 cr, 2021, Ministry of Heavy Industries); capacity in GWh.
Energy storage and the clean-energy link
Place batteries in the bigger energy picture — a strong analytical angle:
- Renewables are intermittent (solar by day, wind when it blows); grid-scale batteries store surplus power and release it on demand — vital for India's target of 500 GW of non-fossil capacity by 2030.
- Batteries enable the shift to electric mobility, cutting oil imports and urban air pollution.
- India is also building critical-mineral security (the Khanij Bidesh / KABIL effort, critical-mineral block auctions) and exploring recycling so it isn't merely swapping oil imports for mineral imports.
Comparing the main battery chemistries
NDA science rewards knowing how the common cells differ — a compact, high-value table:
- Lead-acid — the old car battery; cheap but heavy, low energy density, uses lead + sulphuric acid; still used for vehicle starters and backup (inverters).
- Lithium-ion — light, high energy density, rechargeable many times; powers EVs, phones and laptops; costlier and needs careful thermal management.
- Sodium-ion — an emerging chemistry using abundant, cheap sodium instead of scarce lithium; lower energy density but promising for grid storage.
- Solid-state — a next-generation design replacing the liquid electrolyte with a solid, promising more safety and energy (still maturing).
Two more terms worth carrying: energy density (energy stored per unit weight — why lithium wins for vehicles) and C-rate/cycle life (how fast a cell charges and how many charge cycles it lasts). This is exactly the kind of comparative science the NDA general-knowledge notes reward.
Why it matters strategically
For the SSB and the bigger picture:
- Energy security: home-made cells reduce dependence on imports of both batteries and fuel.
- Defence: drones, soldier systems, submarines and portable gear all rely on advanced batteries — a dual-use technology.
- Aatmanirbhar Bharat: giga-factories, like semiconductor fabs, are about self-reliance in a strategic technology.
Exam relevance in one paragraph
For NDA General Science, retain: an Advanced Chemistry Cell (ACC) is a new-generation high-energy cell (chiefly lithium-ion); every cell has an anode, cathode and electrolyte and converts chemical energy into electrical energy; lithium-ion cells shuttle Li⁺ ions between a graphite anode and metal-oxide cathode, offering high energy density (2019 Chemistry Nobel); the PLI ACC scheme (₹18,100 crore, 2021, Ministry of Heavy Industries) builds giga-scale battery factories; capacity is measured in GWh; batteries are key to EVs, grid storage and defence. For the SSB, ACC batteries illustrate clean-energy self-reliance.
🎯 Practice MCQs
Q1. "ACC" in the battery scheme stands for: (a) Advanced Chemistry Cell (b) Automatic Charging Circuit (c) Alkaline Carbon Cell (d) Alternating Current Coil → (a) — Advanced Chemistry Cell.
Q2. The three basic parts of an electrochemical cell are: (a) anode, cathode and electrolyte (b) rotor, stator and shaft (c) lens, mirror and prism (d) piston, valve and crank → (a) — anode, cathode and electrolyte.
Q3. A battery converts: (a) chemical energy into electrical energy (b) heat into light (c) sound into motion (d) nuclear into thermal → (a) — chemical to electrical energy.
Q4. The lightest metal, giving Li-ion cells high energy density, is: (a) lithium (b) lead (c) iron (d) copper → (a) — lithium.
Q5. The PLI ACC scheme is administered by the: (a) Ministry of Heavy Industries (b) Ministry of Defence (c) RBI (d) ISRO → (a) — the Ministry of Heavy Industries.
Q6. Battery/storage capacity is measured in: (a) watt-hours (Wh/GWh) (b) newtons (c) pascals (d) decibels → (a) — watt-hours (a GWh = one billion Wh).
Q7. A rechargeable battery is also called a: (a) secondary cell (b) primary cell (c) fuel cell (d) solar cell → (a) — a secondary cell.
Q8. In a lithium-ion cell, the anode is typically made of: (a) graphite (carbon) (b) gold (c) glass (d) rubber → (a) — graphite.
Q9. During discharge, electrons flow through the external circuit from the: (a) anode to the cathode (b) cathode to the anode (c) electrolyte to air (d) nowhere → (a) — anode to cathode (that flow is the current).
Q10. The 2019 Nobel Prize in Chemistry recognised the development of the: (a) lithium-ion battery (b) solar cell (c) transistor (d) LED → (a) — the lithium-ion battery.
Q11. Which of these is a "critical mineral" for batteries? (a) cobalt (b) sand (c) limestone (d) chalk → (a) — cobalt (also lithium, nickel, graphite).
Q12. Grid-scale batteries are important for renewables because solar and wind are: (a) intermittent (b) constant (c) unlimited on demand (d) fossil fuels → (a) — intermittent (variable), so storage smooths supply.
Q13. "Giga-scale" manufacturing refers to capacity measured in: (a) gigawatt-hours (GWh) (b) grams (c) gigahertz (d) gallons → (a) — gigawatt-hours.
Q14. Advanced batteries are "dual-use" because they serve: (a) both civilian and defence needs (b) only cars (c) only toys (d) no military use → (a) — both civilian and defence applications.
Q15. India's push for domestic cells mainly aims to reduce dependence on: (a) imported batteries and minerals (b) domestic coal (c) river water (d) farm produce → (a) — imported cells and critical minerals.
Q16. In a cell, ions move through the: (a) electrolyte (b) external wire (c) casing (d) air → (a) — the electrolyte (electrons move through the external circuit).
📋 How this gets asked (PYQ pattern)
Batteries and energy storage are a rising NDA science set. The reliable framings are cell structure (anode/cathode/electrolyte), the energy conversion (chemical → electrical), lithium-ion basics/critical minerals, and the PLI ACC scheme's ministry. A common trap swaps anode and cathode current direction or the scheme's ministry (it's Heavy Industries, not Power). The fresh 2026 hook is the 10 GWh giga-scale ACC tender — ideal for "which cell part / which mineral / which scheme" items. We reference the pattern, not any exact past question.
Preparing for the NDA? Battery chemistry, energy storage and EVs are high-yield science GK and good SSB talking points on clean-energy self-reliance. Follow our daily NDA current affairs and train with serving-officer faculty in the upcoming Cavalier courses in Delhi.
✍️ Written by Col D.N. Sharma — Science & general-studies faculty at The Cavalier. Reviewed by the Cavalier Faculty Desk. The Cavalier, founded by ex-Army officers, has trained NDA/CDS/SSB aspirants since 2001 (Facebook · YouTube).
Source: PIB / Ministry of Heavy Industries release, 15 July 2026. Facts cross-verified with independent sources.