ATL v. CosMX: Willful Infringement Verdict in Lithium-Ion Battery Patent Case
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📋 Case Summary
| Case Name | Ningde Amperex Technology Limited (ATL) v. Zhuhai CosMX Battery Co., Ltd. |
| Case Number | 2:22-cv-00232 (E.D. Texas) |
| Court | U.S. District Court for the Eastern District of Texas |
| Duration | June 24, 2022 – April 26, 2024 672 days |
| Outcome | Plaintiff Win — $4.7M+ Damages |
| Patents at Issue | |
| Accused Products | CosMX’s lithium-ion battery products |
Case Overview
The Parties
⚖️ Plaintiff
A subsidiary of CATL group and a global leader in lithium-ion battery manufacturing, ATL supplies major consumer electronics OEMs and holds a substantial patent portfolio covering battery architecture and electrochemical technologies.
🛡️ Defendant
A growing Chinese battery manufacturer competing directly in markets served by ATL, including consumer electronics and portable device power solutions.
The Patents at Issue
Four U.S. patents formed the basis of ATL’s infringement claims, covering critical lithium-ion battery structural innovations and design technologies. These patents are registered with the U.S. Patent and Trademark Office (USPTO).
- • U.S. Patent No. 10,964,987 (‘987 Patent) — Claims 1 and 17 asserted; covers lithium-ion battery structural innovations
- • U.S. Patent No. 10,833,363 (‘363 Patent) — Claim 1 asserted; battery design technology
- • U.S. Patent No. 11,329,352 (‘352 Patent) — Claim 1 asserted; battery architecture
- • U.S. Patent No. 10,971,706 (‘706 Patent) — Referenced in proceedings
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The Verdict & Legal Analysis
Outcome
The jury returned a unanimous verdict on February 9, 2024, finding CosMX liable for infringing ATL’s patents and that the infringement was willful. Compensatory damages were set at $3,701,108.00. Judge Gilstrap subsequently enhanced damages by $1,000,000 pursuant to 35 U.S.C. § 284, bringing the total award to over $4.7 million, plus interest and costs. ATL was designated the prevailing party.
Key Legal Issues
CosMX succeeded in invalidating two of the four asserted patent claims (claims 1 of the ‘363 and ‘352 Patents). However, the jury’s validation of the ‘987 Patent (claims 1 and 17) proved dispositive. The willfulness finding, coupled with Judge Gilstrap’s direct observation of trial evidence, led to the significant damages enhancement. Additionally, CosMX’s counterclaims under the Sherman Antitrust Act and California Unfair Competition Law, alleging ATL’s pre-litigation correspondence was anticompetitive, were entirely rejected, reaffirming that well-founded pre-suit patent enforcement letters typically withstand antitrust scrutiny under the Noerr-Pennington doctrine.
Freedom to Operate (FTO) Analysis
This case highlights critical IP risks in lithium-ion battery technology. Choose your next step:
📋 Understand This Case’s Impact
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High Risk Area
Lithium-ion battery architecture
4 Patents at Issue
Covering structural and design elements
FTO Options
Design-around and IPR strategies
✅ Key Takeaways
A split invalidity/infringement verdict can still yield substantial damages if core asserted claims survive.
Search related case law →Willfulness findings in E.D. Texas carry real enhancement risk—the presiding judge’s discretion is broad and fact-specific.
Explore precedents →Antitrust counterclaims based on pre-suit letters face a high evidentiary threshold under Noerr-Pennington.
Review legal defenses →Frequently Asked Questions
ATL asserted U.S. Patent Nos. 10,964,987; 10,833,363; 11,329,352; and 10,971,706, covering lithium-ion battery architecture and design innovations.
The jury found CosMX willfully infringed claims 1 and 17 of the ‘987 Patent. Judge Gilstrap enhanced damages by $1M under 35 U.S.C. § 284, citing the totality of trial evidence and conduct.
It establishes a precedent for sustained enforcement of battery architecture patents in U.S. courts, signals antitrust counterclaims face high hurdles, and reinforces E.D. Texas as a favorable plaintiff venue for global battery IP disputes.
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References
- U.S. District Court for the Eastern District of Texas — Case 2:22-cv-00232
- U.S. Patent No. 10,964,987 on Google Patents
- World Intellectual Property Organization — Patent Information
- Cornell Legal Information Institute — 35 U.S.C. § 284
- PatSnap — IP Intelligence Solutions for Law Firms
This article is for informational purposes only and does not constitute legal advice. All case information is drawn from publicly available court records. For platform capabilities, visit PatSnap.