LEAD POWER STORAGE BATTERY

• Main Authors: HASEGAWA MIKITO, OKI NOBUNORI, IZUMI KENJI, KOJIMA MASARU
• Format: Patent
• Language: English; Japanese
• Published: 09.02.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a method of enhancing visibility of a liquid level which is suitable for a case where water is refilled with respect to the lower end of a sleeve (liquid level indicating device) formed from the liquid port of a lead power storage battery to the height of a specified liquid level of electrolytic solution.SOLUTION: In a lead power storage battery in which a positive electrode active material, a negative electrode active material, and an electrolytic solution are housed in a battery case 2, an opening portion of the battery case 2 is sealed by a battery case lid 4 having a liquid port 4a blocked by a liquid port tap 4b, a sleeve 4c is suspended from the liquid port 4a to a specified liquid level of electrolytic solution and water is refilled with reference to a lower end 4d of the sleeve, sodium contained in the electrolytic solution is set in the range from 1 to 90 mmol/l and the specific surface area of positive electrode active material is set in the range from 5 to 9 m/g.SELECTED DRAWING: Figure 1 【課題】鉛蓄電池の液口から電解液の規定液面高さまで形成したスリーブ（液面指示装置）の下端を基準として補水を行う場合に適した液面の視認性を向上させる方法を提供する。【解決手段】電槽２の内部に、正極活物質、負極活物質、および電解液を収納し、液口栓４ｂで塞ぐ液口４ａを有する電槽蓋４で、電槽２の開口部を密封し、液口４ａから電解液の規定液面高さまでスリーブ４ｃを垂下し、スリーブの下端４ｄを基準として補水を行う鉛蓄電池において、電解液に含まれるナトリウムを１〜９０ｍｍｏｌ／ｌの範囲とし、正極活物質の比表面積を５〜９ｍ２／ｇの範囲としたことを特徴とする。【選択図】図１