VALVE-REGULATED LEAD-ACID BATTERY, MANUFACTURING METHOD THEREOF, AND POWER STORAGE SYSTEM INCLUDING VALVE-REGULATED LEAD-ACID BATTERY

• Main Authors: HAYASHI KAZUHIRO, YAMADA SHINJI, SEKIYA KAZUKI
• Format: Patent
• Language: English; Japanese
• Published: 20.12.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a valve-regulated lead-acid battery in which accumulation of lead sulfate in a negative electrode plate is suppressed, a manufacturing method thereof, and a power storage system including the valve-regulated lead-acid battery.SOLUTION: A valve-regulated lead-acid battery includes at least one cell including a positive plate 3, a negative plate 2, and an electrolyte, the positive plate includes a positive electrode material, and the negative plate includes a negative electrode material. The negative electrode material includes a carbonaceous material, and the specific surface area: Sc of the carbonaceous material according to the BET method satisfies Sc≥650 m2/g, and the content: Cc of the carbonaceous material in the negative electrode material satisfies Cc≥0.5 mass%.SELECTED DRAWING: Figure 1 【課題】負極板における硫酸鉛の蓄積が抑制された制御弁式鉛蓄電池、およびその製造方法、ならびに制御弁式鉛蓄電池を備える蓄電システムを提供する。【解決手段】制御弁式鉛蓄電池は、正極板３、負極板２、および電解液を備える少なくとも１つのセルを備え、前記正極板は、正極電極材料を備え、前記負極板は、負極電極材料を備える。前記負極電極材料は、炭素質材料を含み、前記炭素質材料のＢＥＴ法による比表面積：Ｓｃは、Ｓｃ≧６５０ｍ２／ｇを充足し、前記負極電極材料中の前記炭素質材料の含有量：Ｃｃは、Ｃｃ≧０．５質量％を充足する。【選択図】図１