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|1. (WO2018105060) LIQUID LEAD-ACID BATTERY|
|Applicants:||HITACHI CHEMICAL COMPANY, LTD.
|Title:||LIQUID LEAD-ACID BATTERY|
The purpose of the present invention is to minimize stratification of an electrolyte solution and improve durability in a liquid lead-acid battery having a predetermined size. One embodiment of the present invention is a liquid lead-acid battery that has a width dimension of D or more according to the categories defined in JIS D5301 and that is provided with: a positive electrode plate (10); a negative electrode plate (9); a separator (11) arranged between the positive electrode plate (10) and the negative electrode plate (9); a membrane (14) arranged between the negative electrode plate (9) and the separator (11); an electrolyte solution; and a battery case for accommodating the positive electrode plate (10), the negative electrode plate (9), the separator (11), the membrane (14), and the electrolyte solution, wherein the membrane (14) comprises pores having an average pore size of 15 µm or less and the porosity of the membrane (14) is 93% or less.