1. Introduction: China’s Unrivaled Battery Dominance

When a US electric vehicle startup sets out to bring a production model to market, one question quickly becomes existential: where will the batteries come from? The answer, more often than not, leads to China. Chinese manufacturers — Contemporary Amperex Technology Co. Ltd. (CATL), BYD, CALB Group, and Gotion High-Tech — collectively control approximately 70 percent of global battery-cell production capacity. In 2025 alone, CATL shipped over 260 GWh of lithium-ion batteries, enough to power roughly 3.5 million average EVs, and its market share has continued to climb. This concentration is not accidental: China’s early and sustained investment in lithium-iron-phosphate (LFP) chemistry, its dominance in upstream mineral processing (over 70 percent of global cobalt refining and 60 percent of lithium chemical production), and its strategic build-out of gigafactory-scale manufacturing have created a moat that competitors are still years from crossing.

This article presents a detailed case study of one of the most significant US–China EV battery partnerships: Tesla’s strategic relationship with CATL, supplemented with examples from Fisker, Lucid Motors, and others. We examine the partnership structures, technology-transfer dynamics, regulatory headwinds, supply-chain realities, and the strategic calculus on both sides. For any foreign company seeking to understand how to leverage Chinese manufacturing strength while managing geopolitical risk, the Tesla–CATL playbook is essential reading.

2. Case Study Focus: The Tesla–CATL Alliance

In early 2020, Tesla began shipping Model 3 vehicles from its newly built Shanghai Gigafactory fitted with LFP battery packs supplied by CATL. It was a watershed moment. Until then, nearly all Tesla vehicles had used nickel-cobalt-aluminum (NCA) or nickel-manganese-cobalt (NMC) cells supplied by Panasonic (for US-made cars) and LG Energy Solution (for Chinese-made cars). The decision to introduce LFP chemistry — a technology that Chinese manufacturers had been refining for years — was driven by three factors: cost, scale, and geopolitics.

LFP batteries eliminate cobalt and nickel, reducing raw-material costs by an estimated 30 to 40 percent compared to NMC equivalents. For Tesla, then in the throes of scaling production to 500,000 vehicles per year, that cost saving was critical to achieving the elusive $35,000 price point for the Model 3. CATL’s cell-to-pack (CTP) technology, which eliminates the intermediate module layer and packs cells directly into the battery tray, further reduced weight and improved energy density — achieving roughly 160 Wh/kg at the pack level, competitive with many NMC packs at a fraction of the cost.

2.1 The Deal Structure

The Tesla–CATL relationship is structured primarily as a long-term supply agreement rather than a formal joint venture. Under the arrangement, CATL supplies LFP cells to Tesla’s Shanghai Gigafactory at contractually negotiated prices that are periodically adjusted based on raw-material indexes. However, the partnership goes deeper than arm’s-length purchasing. Tesla engineers have worked closely with CATL to adapt the CTP technology to Tesla’s vehicle architecture, and CATL has located a dedicated production line near the Shanghai factory to minimize logistics costs. In 2021, the original two-year contract was extended, and by 2023 Tesla had become CATL’s single largest customer, accounting for an estimated 11 percent of CATL’s total revenue.

Other US EV makers have followed similar templates. Fisker Inc. announced in 2022 that it would use CATL cells in its Ocean SUV, with supply agreements structured to allow Fisker to ramp production without the multi-year lead time of building its own battery factory. Lucid Motors sources cells from LG Energy Solution (a Korean firm with substantial Chinese manufacturing exposure) and has publicly acknowledged evaluating Chinese LFP suppliers for future lower-cost trims. Even Ford and General Motors — not startups, but significant in this context — have signed licensing and supply deals with CATL for LFP battery production in the United States, including a $3.5 billion deal for a Ford-branded LFP plant in Michigan using CATL technology (a deal that has since faced intense regulatory scrutiny).

“The Tesla–CATL relationship showed the entire industry that you could build a premium EV with a Chinese LFP battery, save thousands of dollars per car, and still deliver a product customers love. That changed the calculus for every automaker, not just startups.”
— Sam Jaffe, Vice President of Battery Solutions, E Source, 2024 interview

3. Partnership Structures: From Supply Agreements to JVs

The spectrum of US–China EV battery partnerships ranges in complexity from straightforward purchase orders to deeply intertwined joint ventures with shared intellectual property. Understanding the available structures is essential for any foreign company evaluating Chinese battery partners.

For US EV startups, the long-term supply agreement has been the most common entry point. It requires the least upfront capital and avoids the complexities of joint governance across different legal and regulatory regimes. However, as the Ford–CATL Michigan project illustrates, even technology-licensing deals — where no Chinese company builds or owns the factory — have become politically contentious. The US Treasury Department’s proposed rules under Section 30D of the Inflation Reduction Act (IRA) effectively bar vehicles with “foreign entities of concern” (FEOC) battery components from the full $7,500 consumer tax credit, a restriction that is reshaping deal structures across the industry.

4. Technology Transfer: LFP, CTP, and the Know-How Gap

The technology flowing from Chinese battery makers to US EV companies is not limited to off-the-shelf cells. Three critical technology areas have been at the center of these partnerships, each representing a significant transfer of know-how.

4.1 Lithium-Iron-Phosphate (LFP) Chemistry

LFP battery chemistry was first commercialized in the 1990s by researchers at the University of Texas at Austin and later by A123 Systems (a US company that ultimately filed for bankruptcy in 2012). However, it was Chinese manufacturers — especially CATL and BYD — that perfected LFP for mass-market automotive use. They solved the key challenges of low electronic conductivity and lithium-ion diffusivity through nano-scale carbon coating and advanced particle engineering, achieving energy densities that rose from roughly 90 Wh/kg in 2015 to over 180 Wh/kg at the cell level by 2025. US automakers, including Tesla, have licensed or adapted these formulations rather than developing them in-house, saving hundreds of millions in R&D and years of development time.

4.2 Cell-to-Pack (CTP) Technology

CATL’s Cell-to-Pack (CTP) technology, first introduced in 2019 and now in its third generation, eliminates the conventional battery module layer. By arranging cells directly into the pack tray with structural adhesives and advanced thermal management, CTP increases volumetric energy density by 15 to 20 percent and reduces production costs by approximately 10 percent through part-count reduction. Tesla adapted this concept into its own 4680 structural battery pack, though the 4680 development has been slower than anticipated. The core CTP innovation — treating the cells as structural elements — is now being replicated by battery makers worldwide, with CATL’s patent portfolio serving as both a barrier and a licensing opportunity.

4.3 Manufacturing Process Knowledge

Perhaps the most valuable technology transfer lies in manufacturing processes: electrode coating techniques, electrolyte filling under vacuum, formation and aging protocols, and quality-control systems that achieve defect rates below one part per million. Chinese battery makers have spent over a decade refining these processes across dozens of gigafactories, and their yields (the percentage of cells that pass final test) consistently exceed 95 percent, compared to 85 to 90 percent for many Western startup factories. When Tesla built its 4680 pilot lines in Fremont and Kato Road, it hired engineers with CATL and LG experience and adopted CATL-inspired automation strategies.

5. Regulatory Landscape: Tariffs, IRA Restrictions, and Export Controls

No discussion of US–China battery partnerships is complete without examining the rapidly shifting regulatory environment. The policy landscape has become a minefield that US startups must navigate carefully.

5.1 Section 301 Tariffs on Chinese Batteries

Under the Section 301 tariffs first imposed by the Trump administration in 2018 and reviewed by the Biden administration in 2024, lithium-ion EV batteries imported from China are subject to a 7.5 percent tariff. In May 2024, the Biden administration announced plans to increase this rate to 25 percent by 2026, with additional tariffs on battery components and critical minerals. For US startups sourcing cells from China, these tariffs add meaningful cost — on a $10,000 battery pack, the difference between 7.5 percent and 25 percent is $1,750 per vehicle.

5.2 Inflation Reduction Act FEOC Restrictions

The Inflation Reduction Act of 2022 introduced the most consequential set of restrictions. To qualify for the full $7,500 federal tax credit, an EV must not only be assembled in North America (final assembly rule) but also have a battery that contains no components from a “foreign entity of concern” (FEOC) — a category that includes any Chinese, Russian, North Korean, or Iranian entity. The component ban took effect in 2024, and a critical-minerals FEOC ban follows in 2025. Since CATL, BYD, and virtually all major Chinese battery companies are state-linked enterprises, this effectively bars Chinese-sourced batteries from the US tax-credit market.

5.3 Export Controls on Battery Technology

The US Bureau of Industry and Security (BIS) has imposed export controls on certain battery manufacturing equipment and software, including systems for advanced electrode coating and electrolyte processing. These controls do not prohibit US companies from importing Chinese batteries, but they complicate the reverse flow — US companies seeking to export cutting-edge production machinery to Chinese partners need export licenses, which are increasingly denied for FEOC-linked entities.

“The IRA’s FEOC provisions have created a bifurcated market: one for vehicles sold in the US that require FEOC-free supply chains, and another for the rest of the world. Startups that try to straddle both are finding they need two parallel battery strategies.”
— Kevin Shang, Senior Analyst, Wood Mackenzie, Q1 2026 report

5.4 US–China Trade and Technology Competition

Broader US–China tensions have also affected battery partnerships. The 2022 CHIPS and Science Act included $6 billion for domestic battery manufacturing and recycling, and the Department of Energy’s Loan Programs Office has lent over $30 billion to battery and EV projects since 2022. However, the US has also moved to block certain Chinese investments in American battery startups through the Committee on Foreign Investment in the United States (CFIUS). In 2023, CFIUS forced a Chinese battery company to divest its stake in a Michigan-based battery startup on national security grounds, signaling that equity-based partnerships will face intense scrutiny.

6. Supply Chain Considerations: Graphite, Lithium, and Cathode Concentration

Even when a US startup does not source cells directly from China, it remains deeply embedded in Chinese-dominated supply chains for critical battery materials.

• Graphite: China controls approximately 77 percent of global graphite mining and over 90 percent of anode-grade graphite processing. Natural graphite is the dominant anode material in LFP batteries. In December 2023, China imposed export controls on graphite products, requiring licenses for shipments to the US. While the controls were calibrated to avoid immediate disruption, they serve as a stark reminder of Chinese leverage over the battery supply chain.
• Lithium processing: While Australia and Chile hold the largest lithium reserves, China processes roughly 65 percent of the world’s lithium compounds into battery-grade lithium hydroxide and lithium carbonate. US startups sourcing spodumene from Australia often send it to China for conversion, adding a critical Chinese dependency point that FEOC rules are designed to disentangle — a process that will take years.
• Cathode (LFP) precursor materials: China produces over 80 percent of the world’s cathode active materials and nearly all LFP cathode powder. Even LFP cells manufactured in the US (e.g., by Our Next Energy or Kore Power) source precursor materials from Chinese suppliers because no cost-competitive non-Chinese supply chain yet exists at scale.
• Separator and electrolyte: China produces approximately 70 percent of battery separators and 65 percent of electrolytes. These components are less capital-intensive than cell manufacturing but still represent significant dependencies.

For a US EV startup, this means that even a “US-made” battery is likely 40 to 60 percent Chinese by value in its materials and processing. The IRA’s FEOC deadlines have kicked off a frantic race to build non-Chinese supply chains — Redwood Materials, Ascend Elements, and Li-Cycle are scaling up domestic recycling; Piedmont Lithium and Lithium Americas are developing US hard-rock and brine projects; and graphite alternatives such as silicon-dominant anodes from Sila Nanotechnologies and Group14 Technologies are being commercialized. But none of these alternatives operate at scale today, and their costs are still 20 to 50 percent higher than the Chinese incumbent.

7. Benefits for Both Sides: Why These Partnerships Work

Despite regulatory headwinds, US–Chinese battery partnerships continue to proliferate because the mutual benefits are substantial.

7.1 Benefits for US EV Startups

• Cost advantage: Chinese LFP battery packs cost $75/kWh at scale compared to $110–130/kWh for NMC packs from Korean or Japanese suppliers, and well above $140/kWh for nascent US production. For a 75 kWh pack — typical for a midsize SUV — that difference is $2,600 to $4,100 per vehicle, a margin-critical saving for startups burning through venture capital.
• Speed to market: Chinese battery makers can deliver production-ready cells within 12 to 18 months of signing a deal, compared to 36 to 48 months for building a domestic factory. For a startup racing to beat competitors to market, that 2- to 3-year acceleration can be the difference between success and failure.
• Access to advanced technology: Chinese LFP cells now match the energy density of early NMC cells at lower cost, and CTP technology, sodium-ion prototypes, and fast-charging LFP formulations (achieving 10–80 percent charge in 15 minutes) are being offered to partners.
• Market access in China: For startups like NIO (technically a Chinese company listed on the NYSE) and Tesla, partnering with Chinese battery makers is a prerequisite for selling in China — the world’s largest EV market, with over 11 million EVs sold in 2025.

7.2 Benefits for Chinese Battery Makers

• Scale and revenue: Tesla alone accounted for roughly 25 GWh of CATL’s 2024 shipments — a high-volume, high-revenue customer that helps amortize CATL’s massive gigafactory investments (CATL invested over $13 billion in capacity expansion in 2023 alone).
• Technology validation: Supplying a premium brand like Tesla or Lucid provides a powerful quality signal to other global automakers. In the battery industry, “Tesla-approved” carries enormous weight in marketing to other OEMs.
• Geopolitical hedging: Having deep ties to Western automakers gives Chinese battery makers some leverage against potential trade restrictions. If US tariffs target Chinese batteries, CATL can argue that its customers — US car companies — would be collateral damage.
• Learning about Western vehicle integration: Close engineering collaboration with US OEMs teaches Chinese battery makers about Western safety standards, thermal-runaway requirements, and vehicle-integration practices — knowledge they can apply to future products.

8. Risks and Challenges: The Geopolitical Tightrope

The benefits of US–China battery partnerships come with a parallel set of risks that have grown more acute since 2022. Any foreign company pursuing this strategy must have a robust risk-mitigation framework.

8.1 Geopolitical Disruption Risk

A full-blown US–China trade war, or a conflict over Taiwan — which produces an estimated 10 percent of global semiconductor wafers used in battery management systems — could sever supply lines overnight. During the 2022–2023 period, US export controls on semiconductor equipment to China did not directly affect batteries, but they demonstrated the speed with which the US government can act to restrict technology flows. The battery industry is widely viewed as the next frontier of US–China technology competition, and new restrictions are likely in both directions.

8.2 Intellectual Property Concerns

Technology transfer to Chinese partners carries inherent IP risk. While major battery companies like CATL are increasingly protective of their own IP and enforce their patents aggressively (CATL has sued rivals including CALB and NIO for patent infringement), the legal and enforcement environment in China remains challenging for foreign companies. Trade secrets related to cell chemistry formulations, manufacturing process parameters, and quality-control algorithms have been known to migrate across the industry. US startups must carefully segment the IP they share: product specifications, performance targets, and integration know-how can be shared; core cell chemistry recipes and proprietary manufacturing process data should not.

8.3 Supply Chain Concentration

Over-reliance on a single Chinese supplier creates significant concentration risk. When CATL’s production was temporarily disrupted by COVID-19 lockdowns in 2022, Tesla’s Shanghai output reportedly dropped by 20 percent in the following quarter. Diversification — sourcing from multiple Chinese suppliers, or maintaining a parallel non-Chinese supply line — is essential for resilience but adds cost and complexity.

8.4 Quality and Safety Risk

While CATL and BYD cells have proven generally reliable in the field, the broader Chinese battery ecosystem includes hundreds of smaller producers with varying quality standards. Battery fires in Chinese EVs, though statistically rare, have raised concerns about cell-to-cell thermal propagation and manufacturing consistency. US startups conducting thorough supplier audits — including unannounced factory inspections and rigorous cell-testing protocols — is non-negotiable.

8.5 Regulatory Compliance Burden

Navigating the overlapping regimes of Section 301 tariffs, IRA FEOC rules, BIS export controls, CFIUS investment reviews, and Chinese export controls on graphite and battery materials requires dedicated legal and compliance teams. For a cash-constrained startup, this overhead can be significant. A compliance error — such as inadvertently using a FEOC-linked sub-supplier — could disqualify vehicles from the $7,500 IRA tax credit, destroying the vehicle’s price competitiveness.

9. Lessons Learned and Strategic Recommendations

Drawing from the Tesla–CATL model and the broader patterns observed across the industry, we offer the following strategic recommendations for US EV startups and other foreign companies exploring Chinese battery partnerships.

1. Segment your battery strategy by market. For vehicles destined for the US market, develop an IRA-compliant, FEOC-free battery track — likely NMC cells from Korean or Japanese suppliers, or domestically produced LFP cells using non-Chinese precursors. For vehicles sold in Europe, ASEAN, or the rest of the world, Chinese LFP cells offer the best cost value today. This “dual-track” approach is more expensive to manage but avoids the existential risk of being locked out of the US market.
2. Invest in supply-chain mapping and transparency. Many US startups do not know where their tier-2 or tier-3 suppliers are located. A cell from a Korean manufacturer may use Chinese cathode precursors; an anode from a Japanese supplier may be made from Chinese graphite. Full supply-chain due diligence, including contractual FEOC prohibitions flowing to sub-suppliers, is essential for IRA compliance.
3. Protect your IP from the start. Structure partnerships to limit the transfer of proprietary cell chemistry and process know-how. Use tiered information-sharing agreements, patent thickets, and technical firewalls. Chinese battery makers understand and respect strong IP regimes when they are clearly defined; ambiguity invites problems.
4. Plan for tariffs as a structural cost. Assume that Section 301 tariffs will increase to 25 percent by 2027 and may expand to cover battery components currently exempted. Build tariff sensitivity into your unit economics. If the math does not work under a 25 percent tariff, your business model needs to change.
5. Cultivate at least two independent battery sources. Whether both are Chinese or one Chinese and one non-Chinese, dual sourcing reduces the risk of a single-supplier disruption and provides leverage in price negotiations. The transition to dual sourcing takes 18 to 24 months and should begin immediately, not when the first supplier has a problem.
6. Engage early with regulators. The IRA’s FEOC interpretive guidance is still evolving. Companies that engage proactively with the Treasury Department and the Department of Energy — submitting comment letters, participating in rule-making workshops, and seeking advisory opinions — gain clarity and sometimes influence the final rules.
7. Monitor the sodium-ion and solid-state horizon. CATL and BYD are both commercializing sodium-ion batteries (which use no lithium, cobalt, or nickel and rely on abundant sodium) as a lower-cost alternative for entry-level EVs. Sodium-ion cells could be exempt from some critical-mineral supply-chain concerns. Separately, solid-state batteries — expected to reach volume production by 2028–2030 — could upend the LFP vs. NMC trade-off entirely. US startups should have R&D partnerships or watch agreements in place for both technologies.

“The companies that will win in the next decade are not the ones that completely avoid China, nor the ones that are naively dependent on China. They are the ones that build two independent supply chains — one that leverages Chinese cost and speed, and one that is China-free for the US market. That dual strategy is expensive, but it’s the only way to navigate the current geopolitical reality.”
— Emily Hersh, Managing Partner, DCDB Group (critical minerals advisory), 2025

10. Conclusion: The Chinese Battery Bridge and Its Future

The decade from 2020 to 2030 will be remembered as the period when Chinese battery technology became the backbone of the global electric vehicle industry. US EV startups, from Tesla to Fisker to a new generation of entrants, have built their production strategies around Chinese battery cells, not because of ideological preference but because the economics are overwhelming: Chinese LFP cells offer the lowest cost, highest manufacturing yield, and most mature supply chain of any battery option available at scale today.

The Tesla–CATL partnership — beginning as a supply agreement for the Shanghai Gigafactory and expanding into deep technical collaboration, process adoption, and strategic co-dependence — is the definitive case study in how this relationship works. It demonstrates that US companies can access Chinese battery technology without surrendering their strategic autonomy, provided they are clear-eyed about the risks and disciplined about IP protection and supply-chain diversification.

However, the window for easy Chinese battery access is narrowing. The IRA’s FEOC restrictions, the increase in Section 301 tariffs to 25 percent, BIS export controls, and the broader deterioration in US–China relations are all pushing toward a decoupling of EV supply chains. By 2028, it is plausible that the US and Chinese EV battery markets will be largely separate, with different chemistries, different suppliers, and different cost structures. The US market will see higher battery costs — perhaps $15 to $25/kWh more than Chinese-sourced alternatives — passed on to consumers in the form of slightly more expensive EVs.

For foreign companies entering the Chinese market, the lesson is clear: Chinese battery partnerships offer unmatched cost and speed advantages today, but they must be structured with an exit strategy, IP protection, and regulatory compliance built into the deal from day one. The companies that treat Chinese battery makers as pragmatic partners — rather than strategic allies or existential threats — will be best positioned to navigate whatever comes next.

China’s battery dominance is not a temporary advantage. It is the result of two decades of sustained industrial policy, infrastructure investment, and manufacturing learning-curve effects that will not be replicated overnight. For as long as that advantage persists, the smartest strategy for US EV startups is not to fight it, but to partner with it — carefully, strategically, and with one eye always on the road ahead.