{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9847663","patent":{"patent_number":"US-9847663","title":"Secondary-battery charging system and method and battery pack","assignee":null,"inventors":[],"filing_date":"2014-03-13T00:00:00.000Z","publication_date":"2017-12-19T00:00:00.000Z","cpc_codes":["H02J","H02J"],"num_claims":5,"abstract":"A charging system includes battery pack and charger. During the charge of secondary battery, charge control unit controls charger so that the charger performs constant-current charge at a first charge current, and, when at least one of the following conditions is satisfied, switches the first charge current to a second charge current lower than the first charge current and continues the constant-current charge. The conditions include the condition that the SOC of secondary battery arrives at a threshold SOC value and the condition that the inter-terminal voltage of secondary battery arrives at a threshold inter-terminal voltage. In response to the degree of degradation of secondary battery, the charge control unit drops at least one of the threshold SOC value and the threshold inter-terminal voltage."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Secondary-battery charging system and method and battery pack","description":"A charging system includes battery pack and charger. During the charge of secondary battery, charge control unit controls charger so that the charger performs constant-current charge at a first charge","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9847663","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9847663","citation_suggestion":"Patentable. \"Secondary-battery charging system and method and battery pack\" (US-9847663). https://patentable.app/patents/US-9847663","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9847663","json":"https://patentable.app/api/llm-context/US-9847663","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:16:43.714Z"}