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Battery parts and separator manufacturer in Bangladesh

Need a battery parts and separator manufacturer in Bangladesh? Send your drawing or sample, the material and the quantity. We source separators, grids, lead alloy, oxides and containers from verified sellers, check each lot against the agreed tests and deliver to your plant.

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Prefer to deal with suppliers yourself? Post it on the requirement board

Buying battery parts and separators in Bangladesh

Battery parts are the pieces a lead-acid battery is built from: separators, lead alloy grids, lead oxides, plastic containers and lids, and vent valves. In Bangladesh some larger lead-acid makers produce their own lead alloy, oxides, grids and containers; we have found no source showing separators made here. Buyers are assemblers abroad and at home, where a 2021 national report counted 19 registered firms that make or recycle lead-acid batteries.

Roptan finds the battery parts and separator manufacturer in Bangladesh, or the importer, that can supply to your drawing. We write dimensions, materials and agreed test methods into the order, check each lot against your approved sample and deliver to your plant.

Kinds of battery parts and separators

Separators for flooded batteries

Porous sheets set between positive and negative plates to stop short circuits while ions pass. Polyethylene, PVC and rubber have all been used; choose by plate size and duty.

AGM glass-fibre separators

In a sealed AGM battery a glass-fibre mat soaked in electrolyte replaces the usual separator, holding just enough acid to stay wet. Choose it for valve-regulated batteries.

Grids and lead alloy

Grids carry current and hold the active material. High-antimony alloy makes a rigid grid for frequent cycling but gives off more hydrogen, so needs more watering; lead-calcium gasses less and suits low-maintenance batteries.

Containers, lids and vent valves

Battery cases are often polypropylene, injection moulded to a drawing. Valve-regulated cells add a pressure release valve per cell, which protects the case on severe overcharge.

Lithium-ion separators

A different product: thin microporous film of uniform thickness, and polyethylene film can melt its pores shut when a cell overheats. Never substitute a lead-acid separator.

How to specify battery parts and separators

Separator type and material: State flooded or AGM, the material, and sheets, rolls or envelopes, with the drawing or an approved sample.
Size against the plate: A separator must be a little larger than the plate so loose material cannot short between plates. Give plate size and separator width and height.
Separator properties: List porosity, pore size, electrical resistance, mechanical strength and resistance to acid and oxidation, each with an agreed method and limit.
AGM mat: For glass-fibre mat, add thickness, compressibility and recovery, surface area and acid weight loss.
Temperature: The separator must stay stable over the battery's working temperature, so say where the batteries will work.
Grid alloy: Name the alloy, lead-calcium or lead-antimony, and send the grid drawing. Lead-calcium gives off less hydrogen and needs less watering.
Containers and lids: Send container and lid drawings, the material and the vent or valve design, and ask whether an existing mould fits.

Test methods and paperwork for battery parts

BCIS-03B: Test methods from Battery Council International, a US industry group, for flooded-battery separators: dimensional stability, porosity, puncture resistance, thickness and wetting, plus chemical tests.
BCIS-03A: The same body's methods for AGM separators, covering compressibility, surface area, thickness, acid weight loss and organic impurities.
Agreed drawing and sample: BCI says the battery maker and separator maker jointly agree the test methods and limits for each battery type, so write both into the order.
Battery acid and SDS: Battery acid supplied with parts is Class 8, UN 2796, in the US hazardous materials table. Ask for a safety data sheet to GHS for acid and lead oxides.

What moves the price of battery parts and separators

Lead alloy and oxides: almost all of their weight is lead, so ask whether the quote is fixed or moves with the lead price.
Separator type: an AGM glass-fibre mat and a flooded-battery separator are different products, so compare quotes within one type.
Moulds: a new container or lid design needs its own injection mould, a one-off cost before the first lot.
Your limits: tighter tolerances and more tests per lot mean more inspection work on every order.

Lead times and delivery

Time depends on where the part comes from. Grids, lead alloy, oxides and containers made by a Bangladeshi lead-acid maker depend on its own production plan; imported separators depend on the shipment. A new drawing adds a sample round and, for containers, a mould. Roptan confirms the dates and any minimum in the quote.

Inside Bangladesh we deliver to your plant in sealed, labelled packs, separators kept flat, clean and dry. Each lot comes with the agreed test results, the drawing revision it was made to, a packing list and a VAT invoice (Mushak 6.3), plus the seller's lot certificate for imported separators.

Buying battery parts and separators for export

For assemblers abroad we quote FOB Chattogram for parts made in Bangladesh, such as lead alloy, oxides, grids and containers. Battery parts usually fall under HS subheading 8507.90, parts of electric accumulators; your broker confirms the line. Documents: commercial invoice, packing list, bill of lading, certificate of origin, lot test results and an SDS where needed.

What we check for this order

Fit to the plateWe measure separator width, height and thickness against your drawing and plate size, so every sheet covers its plate.
Agreed test resultsWe check the lot's porosity, electrical resistance and acid resistance results against the limits and methods in your order.
Matches the approved sampleWe compare each lot with your approved sample for material, profile and finish, and stop any change of material.
Containers and valvesWe check container and lid dimensions, wall finish and the vent or valve seat against the drawing before dispatch.

Questions buyers ask

Are battery separators made in Bangladesh?

We have seen no evidence that they are, so treat them as imported. The larger Bangladeshi lead-acid makers do produce their own lead alloy, oxides, grids and containers. For separators, Roptan sources through sellers who import them and checks each lot.

Is there a standard for lead-acid battery separators?

Battery Council International, a US industry group, publishes test methods for flooded and AGM separators, and says the battery maker and separator maker jointly agree the methods and limits for each battery type. So your drawing, approved sample and agreed limits become the specification.

Should my grids be lead-calcium or antimony?

It depends on the duty. High-antimony alloy gives a rigid grid and is still used where plates cycle often, but it gives off more hydrogen, so the battery needs more watering. Lead-calcium gasses less and suits low-maintenance and standby batteries. Name the alloy on the drawing and test the finished battery before you switch.

What separator materials are in batteries used in Bangladesh?

A university laboratory analysis quoted in a 2021 national report found separators of polyester, polypropylene or glass-fibre mat, about 7 percent of a used lead-acid battery's weight. Name your material on the drawing.

How soon will I hear back about batteries?

Within 48 hours of a complete requirement, with a price and a delivery date. A requirement is complete when it has the quantity, where it is needed and by when.

Who do I deal with?

With Roptan, when Roptan manages the order: we buy from the verified seller and deliver to you. With the supplier directly, when you post on the requirement board and choose a quote yourself.