{"id":1530,"date":"2018-04-04T23:14:57","date_gmt":"2018-04-04T21:14:57","guid":{"rendered":"http:\/\/www.keenlab.de\/?post_type=product&#038;p=1530"},"modified":"2026-06-22T14:07:48","modified_gmt":"2026-06-22T12:07:48","slug":"kweld-ultracapacitor-module","status":"publish","type":"product","link":"https:\/\/www.keenlab.de\/index.php\/product\/kweld-ultracapacitor-module\/","title":{"rendered":"kCap ultracapacitor module"},"content":{"rendered":"<p><em>To customers from the U.S., Canada or Mexico: visit our North America reseller <a href=\"https:\/\/gridrewired.com\/collections\/all\">here<\/a><\/em><\/p>\n<hr class=\" hr_color\" style=\"margin:0 auto 30px;\"\/>\n\n<p><em>The assembly and operation manual is available on this website for download: <a href=\"https:\/\/www.keenlab.de\/wp-content\/uploads\/2022\/12\/kCap-manual-r2.0.pdf\">https:\/\/www.keenlab.de\/wp-content\/uploads\/2022\/12\/kCap-manual-r2.0.pdf<\/a><\/em><\/p>\n<hr class=\" hr_color\" style=\"margin:0 auto 30px;\"\/>\n\n<p>This module features six Maxwell BCAP0310-P270-T10 ultracapacitors with ultra low internal resistance, delivering more than 1000A of pulse current to the <em>kWeld<\/em> system, but the power delivery capacity of the module of up to 5kW enables the use of this module can also be used for a variety of other demanding applications.<\/p>\n<p><strong>IMPORTANT!<\/strong> Connect a suitable <strong>current regulated<\/strong> power supply to the inputs of the module, and the <em>kWeld<\/em> 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.<\/p>\n<p><strong>IMPORTANT! <\/strong>Simple transformer-rectifier based PB chargers are not usable, as they do not feature current regulation. For the same reason, do not connect the module directly to a battery, as this will lead to uncontrolled current flow and possible damage of the module. Also, most off-the-shelf power supplies are using hickup-style overcurrent protection &#8211; these are <strong>not<\/strong> current regulated.<\/p>\n<p>In order to weld with quick repetition rates, the <em><a href=\"http:\/\/www.keenlab.de\/index.php\/product\/ksupply\/\">kSupply module<\/a><\/em> is recommended to power this module as it provides 70A of charging current. The welder consumes up to 500W of average input power during intense use. However, when a slower recharging speed can be accepted, the following options may offer a more affordable solution. An output current of at least 20A is recommended &#8211; the <em>kCap<\/em> user manual includes a graph that estimates the achievable welding repetition rate as a function of available current.<\/p>\n<ul>\n<li>Meanwell RSP-150-7.5 (available from Digikey: 1866-4228-ND &#8211; use the adjustment trimmer to set the output voltage to 8.2V &#8211; <strong>warning<\/strong>: protect the AC input side against risk of electrical shocks!)<\/li>\n<li>Any current limited lead acid battery charger with 13.8V output voltage<\/li>\n<li>Any bench power supply<\/li>\n<\/ul>\n<p>The key specifications are:<\/p>\n<ul>\n<li>input voltage 8.1V &#8211; 14.0V<\/li>\n<li>input current 70A max<\/li>\n<li>input protected from reverse powering the supply (ideal diode circuit)<\/li>\n<li>output voltage is automatically kept in 8.0V &#8211; 8.3V range (power supply disconnect)<\/li>\n<li>six Maxwell BCAP0310 cells in a 3S2P configuration<\/li>\n<li>pack capacity 206F \/ 6780Ws<\/li>\n<li>internal resistance 3.3 milliOhms<\/li>\n<li>typical short circuit current 2400A<\/li>\n<li>maximum power delivery 5000W (into a 3.3 milliOhm load)<\/li>\n<li>advanced balancing circuit that keeps all cells within +-50mV at all charging levels<\/li>\n<li>temperature monitoring and control of an optional 120mm fan<\/li>\n<li>separate input and output terminals (for ring cable lugs, with holes for M5 screws)<\/li>\n<li>LED indication for balancer activity, temperature sensor, and charging activity<\/li>\n<li>fully protected against voltage spikes from inductive kickback from welding<\/li>\n<li>dimensions 110 x 110 x 74mm<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Performance when used with kWeld:<\/p>\n<ul>\n<li>maximum continuous repetition rate with <em>kWeld<\/em> (50J pulses):\n<ul>\n<li>once every 4 seconds without fan cooling<\/li>\n<li>once every 2 seconds with a Scythe Slip Stream SY1225SL12SH fan mounted (not included in the kit)<\/li>\n<\/ul>\n<\/li>\n<li>typical welding current 1100A<\/li>\n<li>maximum usable welding pulse energy 100J<\/li>\n<li>maximum nickel strip thickness 0.2mm<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>You receive a complete board that is ready to go, including mounting hardware and two short connecting cables (AWG8 with crimped cable lugs on both ends) that replace the stock <em>kWeld<\/em> battery cables.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To customers from the U.S., Canada or Mexico: visit our North America reseller here The assembly and operation manual is available on this website for download:<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"featured_media":10428,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[21],"product_tag":[],"class_list":{"0":"post-1530","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-kspot-welder-kit","8":"first","9":"instock","10":"taxable","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.keenlab.de\/index.php\/product\/kweld-ultracapacitor-module\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.8\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"keenlab | Electronic projects and engineering services\" \/>\n\t\t<meta property=\"og:type\" 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