for PE, AGM, and leaf-type elements

BM Rosendahl ast-on-strap battery machine RoCOS X1

our cos machines

High quality machines result in high quality products

BM Rosendahl battery manufacturing equipment RoCOS X1

for automotive battery production


Processes up to 4.5 batteries/min (PE) and up to 4 batteries/min (AGM)

equipment for lead-acid battery production: RoCos T1 cast-on-strap machine

for truck battery production


for car and truck batteries, highly flexible for VRLA and flooded SLI truck batteries with an output of up to 3 batteries/min.

automotive battery manufacturing equipment RoCOS S1

for industrial battery production


for telecom, stationary and traction batteries processing PE and AGM with an output of up to 2.5 batteries/min


Cast-on-strap (COS) machines. The heart of every battery production

With our RoCOS X1, you get the fastest cast-on-strap machine with a single mold in the world. Process up to 4.5 batteries/min with PE and 4 batteries/min with AGM elements. High quality machines result in high quality products. Special mold coatings and materials are available, therefore increased lifetime and additional lead savings possibilities are given.

RoCOS is a flexible and high-quality machine for all battery types. Several options are available such as automatic robot loading, pole insert station, automatic pot changing system and data traceability.

BM Rosendahl battery machines

machine details

If you want to achieve high-quality straps, a chain of optimized processes must be followed

  • loading & aligning of elements
  • lug preparation
  • casting
  • unloading & boxing

Mainly driven by servo motors, our COS machines include many innovative features.



station 1

loading & aligning of elements

  • swivelling arm or by robot (RLS)
  • element aligning (vibration table, lateral, and on lugs)

station 2

lug preparation 

  • brushing (optional)
  • fluxing (continuous filling and level control)
  • preheating (controlled drying, permanent temperature control)
  • tinning (for VRLA batteries)

station 3


  • precise, stable, and lead-saving

station 4

unloading & boxing

  • overhead gantry or robot system
  • active boxing frame for PE
  • compression unit for AGM

Did you know that only 0.5 mm thicker straps can result in up to 57 tons higher lead consumption per year?

With our mold technology, you can produce high-quality straps at a constant thickness – that helps you to save on energy and lead.

Upcoming events

BCI Convention 2024 / Fort Lauderdale, Florida / April 21st, 2024

Battery Show 2024 / Stuttgart, Germany / June 18th, 2024

BM Rosendahl cast-on-strap battery machine RoCOS X1


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with us

Rosendahl Nextrom is a global leader in battery, cable & wire and optical fiber production technologies whose goal is to connect your needs with our technology. Quality, customization, product know-how and close cooperation with our partners are our core values.
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