Battery Supply Tightens as Chinese Companies Accelerate Domestic Capacity Expansion

Overview

Based on field research conducted at the 2026 China International Battery Fair (CIBF), UBS observes a fundamental shift in the dominant theme across the global battery supply chain—from prior concerns about overcapacity to emerging capacity tightness, particularly in the energy storage system (ESS) battery segment. Chinese battery manufacturers are currently operating near full capacity and prioritizing domestic expansion, while localization of production overseas has been delayed. The report also analyzes opportunities and constraints for sodium-ion batteries amid rising lithium prices, as well as the slower-than-expected progress on all-solid-state batteries. Although sector valuations sit at historical lows, new ESS capacity may exert downward pricing pressure.

Core views

Supply-demand dynamics have reversed; domestic expansion is aggressive. CIBF 2026 signals a marked shift in industry sentiment—from fear of overcapacity to concern over capacity tightness, especially for ESS cells. Chinese manufacturers’ utilization rates are approaching saturation, and they are prioritizing domestic capacity additions. According to exhibitor feedback, CATL plans to add 500 GWh of capacity by end-2026 (a 65% increase versus 772 GWh at end-2025), and EVE Energy plans to add 260 GWh (a 150% increase versus 170 GWh at end-2025). Envision Group, a leading separator manufacturer, expects to add 5 billion square meters of separator capacity by end-2026. Equipment manufacturers broadly agree that new battery production lines in China can still be built within 6–8 months at a cost of approximately RMB 100 million per GWh. Sodium-ion batteries: Cost advantage emerges but bottlenecks persist. With lithium carbonate prices up ~60% year-to-date to ~RMB 190,000/ton, interest in sodium-ion batteries has rebounded. Under optimal yield conditions, NFPP (sodium iron phosphate) sodium-ion battery cell costs have fallen to RMB 0.45–0.50/Wh. If yield improves from the current ~50% to optimized levels and lithium carbonate prices remain above RMB 200,000/ton, sodium-ion batteries could achieve cost parity with LFP batteries at the cell level. However, persistent bottlenecks include low energy density (NFPP ~100 Wh/kg, far below LFP’s 170–200 Wh/kg), suboptimal yields, and challenges scaling up hard carbon anode production. Sodium-ion batteries are best suited for stationary energy storage in cold climates and starter-stop systems for heavy-duty trucks (replacing lead-acid batteries). All-solid-state batteries: Progress remains slow and early-stage. Compared to breakthroughs in dry electrode technology showcased at CIBF 2025, progress on all-solid-state batteries appears slower this year. Industry experts indicate that six leading firms under China’s All-Solid-State Battery Collaborative Innovation Platform are expected to launch pilot programs involving ~1,000 electric vehicles in 2027. While dry-electrode equipment suppliers such as Tsingyan have signed letters of intent for mass-production lines, U.S.-based solid-state battery manufacturer Eactorial notes that high stack pressure requirements (≥1 MPa) continue to constrain pack-level energy density.

Analysis framework

This report employs a typical 'trade-show research + supply-chain validation' methodology. Analysts attended CIBF—the world’s largest battery exhibition—to directly observe exhibitor count, types, and on-site feedback, gathering first-hand insights on capacity utilization, expansion plans, and technology developments. Concurrently, perspectives from equipment manufacturers and industry experts were integrated to cross-validate timelines for new production lines, cost structures, and technical bottlenecks. For valuation analysis, the report applies EV/EBITDA and P/B multiples, benchmarking them against historical averages to assess sector investment appeal and potential risks.

Methodology notes

• Sector/Industry Analysis FrameworkSupply-demand framework

  Supply-Demand Framework

  The report assesses whether the industry is shifting from 'oversupply' to 'tightness' by observing capacity utilization, expansion plans, and inventory levels—a core logic for identifying inflection points in cyclical manufacturing sectors.

• Sector/Industry Analysis FrameworkCost curve analysis

  Cost-Curve Analysis

  The report compares sodium-ion battery costs versus LFP batteries under varying lithium price and yield assumptions, analyzing the conditions required for sodium-ion batteries to reach 'cost parity'—illustrating competitive dynamics through cost-curve reasoning.

• Valuation MethodologyEV/EBITDA valuation

  EV/EBITDA Valuation

  The report applies EV/EBITDA and P/B multiples to value global battery companies and compares them against historical average percentiles to determine whether current valuations offer a margin of safety.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• CATL

  Beneficiary/Leader

  Strengths

  Plans large-scale capacity expansion of 500 GWh, reflecting strong demand visibility and robust capacity deployment capability

  Risks

  Pricing pressure in the energy storage segment

• EVE Energy

  Beneficiary/Aggressive Expander

  Strengths

  Plans to add 260 GWh of capacity, representing a 150% increase

  Risks

  Pricing pressure in the energy storage segment

• Envision Group

  Beneficiary/Upstream Material Supplier

  Strengths

  Expected to add 5 billion square meters of separator capacity, aligning with downstream expansion needs

• Tsingyan (Tsinghua Energy)

  Beneficiary/Equipment Supplier

  Strengths

  Has signed letters of intent for all-solid-state battery mass-production lines, benefiting from emerging technology pathways

  Risks

  Slower-than-expected commercialization of all-solid-state batteries

Key data

• CATL’s 2026 New Capacity Target500 GWhA 65% increase versus 772 GWh at end-2025
• EVE Energy’s 2026 New Capacity Target260 GWhA 150% increase versus 170 GWh at end-2025
• Lithium Carbonate Price~RMB 190,000/tonUp ~60% year-to-date
• Sodium-Ion Battery (NFPP) CostRMB 0.45–0.50/WhUnder optimal yield conditions
• Global Battery Stock Valuation15x EV/EBITDA, 3.3x P/BBased on consensus forward 12-month estimates; below historical averages by 0.4/0.3 standard deviations
• New Battery Production Line Timeline/Cost6–8 months / ~RMB 100 million/GWhConsensus among equipment manufacturers

Impact & implications

The report concludes that although global battery stocks currently trade below historical average valuations—suggesting relative attractiveness—significant new capacity entering the market may exert pricing pressure on the energy storage (ESS) segment. Chinese companies’ preference for domestic expansion over overseas localization may intensify domestic competition but also reflects confidence in local supply chain efficiency. Sodium-ion batteries hold substitution potential in niche applications (e.g., cold-climate stationary storage) but are unlikely to displace LFP as the mainstream chemistry in the near term. Commercialization of all-solid-state batteries is progressing more slowly than market expectations; investors should temper short-term expectations.

Risks

• Battery safety issues leading to recalls could negatively impact industry demand or individual companies.
• Government policies—including tariffs, procurement rules, and export controls—may materially affect battery profitability and market share.
• Pricing pressure in the energy storage segment due to a surge of new capacity.

What to watch

• Whether lithium carbonate prices sustain above RMB 200,000/ton to support sodium-ion battery economics.
• Whether sodium-ion battery yield improves from ~50% to optimized levels.
• Progress of pilot programs by Chinese all-solid-state battery firms in 2027.
• Price trends and ramp-up timing for new energy storage battery capacity.