5 in stock (can be backordered)

Brands: Keenlab
Product Code: kCap – Ultracapacitor Module (Complete)
Availability: In Stock


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5 in stock (can be backordered)

This module features six Maxwell BCAP0310-P270-T10 ultracapacitors, delivering more than 1000A of pulse current to the kWeld system.  Connect a suitable power supply to the inputs of the module (e.g. the kSupply module), and the kWeld to its output terminals to create a stationery spot welding solution. Because it is modular, you can easily change back the system into a portable welder.  The power delivery capacity of the module of up to 5kW enables the use of this module can be used for a variety of other demanding applications.  The module is a complete board that is ready to go, including two connecting cables (AWG8 with crimped cable lugs on both ends) that replace the stock kWeld battery cables.

The assembly and operation manual is available on for download at: Please make sure to study them carefully in order to ensure safe and reliable operation.

IMPORTANT NOTICE: the module is not protected against overvoltage – the rated voltage of 8.1V must be observed. As the ultracapacitors are filled with a liquid electrolyte, overcharging them can lead to their destruction.

The key specifications are:

  • six Maxwell BCAP0310 cells in a 3S2P configuration
  • rated voltage 8.1V
  • pack capacity 206F / 6780Ws
  • internal resistance 3.3 milliOhms
  • typical short circuit current 2400A
  • maximum power delivery 5000W (into a 3.3 milliOhm load)
  • advanced balancing circuit that keeps all cells within +-50mV at all charging levels
  • temperature monitoring and control of an optional 120mm fan
  • separate input and output terminals (for ring cable lugs, with holes for M5 screws)
  • LED indication for balancer activity and temperature sensor
  • fully protected against voltage spikes from inductive kickback from welding
  • dimensions 110 x 110 x 47mm

Performance when used with kWeld:

  • maximum continuous repetition rate with kWeld (50J pulses):
  • once every 4 seconds without fan cooling
  • once every 2 seconds with a Scythe Slip Stream SY1225SL12SH fan mounted (not included in the kit)
  • typical welding current 1100A
  • maximum usable welding pulse energy 100J

Tags: kWeldSpot-WelderDIY-Welding-kitDIY-Spot-Welding-KitMaxwell-Ultracapacitors,

SKU: 5487FB8/24 Category:
Weight 600g
Important Note IMPORTANT NOTICE: the module is not protected against over-voltage – the rated voltage of 8.1V must be observed. As the ultracapacitors are filled with a liquid electrolyte, overcharging them can lead to their destruction.
Warning You are dealing with very high energy levels when using this system, which may result in personal injury or fire when handled improperly. Take appropriate safety measures and use this system with caution. Never leave it unattended while being powered. This product contains small parts, keep out of reach of children! This system produces significant magnet fields, do not use it when you have a cardiac pacemaker!
Manufacturer’s Warranty Disclaimer: This kit is provided as is without any guarantees or warranty, except where obliged by national law. In association with the product, and makes no warranties of any kind, either express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, of title, or of noninfringement of third party rights. Use of the kit by a user is at the user’s risk. In no event shall and/or be liable for any direct, indirect, punitive, incidental, special, or consequential damages whatsoever arising out of or connected with the use or misuse of any product purchased herein. You agree and acknowledge that any product purchased should be used at your own risk and you should assess the risks before purchasing any product or using any product. You agree that in the event that and/or is deemed liable for any harm caused, the amount which it shall be liable to you shall be limited to the cost of the product. NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, OF MERCHANTABILITY, FITNESS FOR A SPECIFIC PURPOSE, THE PRODUCTS TO WHICH THE INFORMATION MENTIONS MAY BE USED WITHOUT INFRINGING THE INTELLECTUAL PROPERTY RIGHTS OF OTHERS, OR OF ANY OTHER NATURE ARE MADE WITH RESPECT TO INFORMATION OR THE PRODUCT TO WHICH INFORMATION MENTIONS. IN NO CASE SHALL THE INFORMATION BE CONSIDERED A PART OF OUR TERMS AND CONDITIONS OF SALE.

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