Flood Lead Acid Battery AGS GX 175 12V Blast Problem

Blast happens during charging and loose connection makes spark. It travels fast by hydrogen path and creates blast. Terminals be strongly secured. May be nut bolt.

Agree with tornado as first option.

Second option is that one (or two) of the caps were already missing and the super hot, very fine particles of steel/iron got into the acid and released Hydrogen, enabling the battery blast you describe.

Battery in wrong place at wrong time.

When batteries are being recharged, they generate hydrogen gas that is explosive in certain concentrations in air (explosive limits are 4.1 to 72 percent hydrogen in air). The ventilation system can exchange an adequate amount of fresh air for the number of batteries being charged.

You either had a dead short in that cell or like the others said there was hydrogen gas built up and it ignited!

It looks very similar to the battery that exploded in my car years ago!

The sparks from the grinder either ignited the free hydrogen at the top of the battery through the vent cap or one or more of the hot metal chips melted through the battery case and ignited the hydrogen within the battery cell.

Cutting & welding should never be allowed in, around, or above batteries without proper forced ventilation and safety covers/shields/blankets in place over the batteries to protect them from damage.

A small angle grinder or "peanut" grinder (like an overgrown Dremel^TM).

I hope that you are right.

Dear Mr. ahamadarshad,

You have not mentioned whether the battery charger is switched off. Though you have referred that the battery is fully charged, I think the charger was kept on and continue to charge the battery, and during charging the Hydrogen is released. You also know that the Hydrogen is highly explosive once ignited, and releases intensive heat energy at the rate of 60,000 Btu/Lb. of Hydrogen.

The spark generated during grinding should have ignited and resulteding explosion.

DHAYANANDHAN.S

That's quite normal (sadly) for an LA battery that is not sealed. No naked lights or sparks are allowed. Many people over many years have lost their sight by looking in such a battery with a lighted cigarette in their mouths. It still happens!!

Must be in a properly ventilated environment. Not inside a building.

Those batteries look like normal truck batteries in the picture, if true, not for use "inside" a building.

In use these batteries can release this explosive gas, especially when charging above 70% capacity, or being charged very rapidly.

See here:-

Oxyhydrogen & Brown's gas

Even the so called SLA batteries can get an over pressure, the release valve operates and releases the "Brown's Gas", which can be ignited with a single spark....the "S" stands for sealed by the way.

Your company safety officer should be fired......also the training is incomplete for the users for the electric Trolley as they should know all about this.....

There are specific types of battery to be used for such units, they cost more of course.

See your local code for details.

You may find this link interesting to read, there is also a picture of a car battery that has exploded:-

Lead_acid_battery

Batteries approved for Fork Lift Trucks, for inside buildings, may be a possible way to go in the future....

I am fairly sure that your trolley needs to follow similar guidelines and style of propulsion.

Its easy to see why gas powered Fork lift trucks are used quite often nowadays.

Gas is contained in a heavy pressure cylinder, relatively easy to replace and the exhaust does not burn or explode.

See here:-

forklift-power

Best of luck.

The regulation is, welding and grinding should only take place in a dedicated enclosed safety area or must be enclosed with a safety screen with no other unprotected devices or persons without protective clothing and face/eye protection present. That is what is wrong. Must be reported to industry Safety board, that will then become a worse problem.

It is possible the two cells had a clogged vent hole.

Dear Sir,

Battries were fully charged but charger was not connected.

As per all experts advises, its mean should we have to install Dry batteries??? is it safe?? as compare Lead Acid battries???