Cell features - spec30180016

DOE-SPEC-3018-96

a. Batteries shall be of the flooded lead-acid type. All cells shall be completely

assembled and shall be shipped in accordance with Section 7.

ATTENTION:

In the next paragraph, enter the desired positive-plate type. Plate type can be pure lead, lead calcium or lead

antimony. Some manufacturers also indicate a lead-selenium plate type. This plate is actually a lead-antimony

type with very low selenium content. The only pure-lead plate available from U.S. suppliers at the time of this

writing is the AT&T round cell, which may have to be oversized from a capacity standpoint to provide the high

current rate.

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b. Batteries shall be of the [pure-lead] [lead-calcium] [lead-antimony]

[lead-selenium] alloy type, with positive and negative plates of Seller's

standard design. Active material for the positive plates shall be lead dioxide,

and for the negative plates shall be sponge lead. Active materials shall be

retained in structures designed to retard corrosion and withstand over-

charging. Negative plates shall have a life equal to or greater than that of

positive plates.

3.3.3

Cell features.

a. Each cell element shall be in a fire-retardant, high-impact transparent plastic

[jar and] cover. The jar and cover material shall have a limiting oxygen index

(LOI) of at least 28%.

b. Cement or otherwise fasten cell covers to containers to form a leakproof and

gas-tight seal, and fit with sprayproof vents. The vent plug shall be the

flame-arrester type.

c. Size jars to prevent compression of the plates, and to allow space at the

bottom for sediment that may accumulate during the life of the battery, yet

prevent contact between the sediment and the plates. Design cells to

accommodate plate growth such that the jar and cover will not crack.

d. Where applicable, mark all four sides of each cell jar with high and low

electrolyte-level lines.

ATTENTION:

Enter the appropriate cell voltages below. The float voltage depends on the plate alloy and specific gravity

selected. Refer to the battery manufacturer's recommended values. The equalization voltage and the minimum

discharge voltage are normally determined from the maximum and minimum input voltage ratings of the

UPS/connected system.

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e. All cells shall be suitable for float at [2.25 V] [

V] per cell and equalize at

V] per cell. The minimum discharge voltage shall be [1.75 V]

[2.33 V] [

V] per cell.

[

Support plates so that no undue stress is placed on the jar or cover during

the life of the battery. Negative and positive plates shall be matched.

Reinforce the plates as needed to retain their shape and maintain the low