{"id":219,"date":"2009-12-11T08:54:59","date_gmt":"2009-12-10T22:54:59","guid":{"rendered":"https:\/\/currentsunshine.com\/?p=219"},"modified":"2009-12-11T09:23:27","modified_gmt":"2009-12-10T23:23:27","slug":"battery-test-cont","status":"publish","type":"post","link":"https:\/\/currentsunshine.com\/?p=219","title":{"rendered":"Battery test (cont)"},"content":{"rendered":"

Yesterday I was able to test for about 40 minutes…<\/p>\n

\"This
This is voltage after about 50% drawdown.<\/figcaption><\/figure>\n

I gradually increased the power to 4500 watts and at all times the pack voltage and individual cell voltages stayed high. No sagging under load. So the problem was indeed a poor interconnection.<\/p>\n

At 4500 watts though I got a ‘thermometer’ icon on the Torqeedo and it automatically reduced power to 4000 watts. I manually reduced it back to 2500 watts shortly after. And soon the temperature warning disappeared.<\/p>\n

I felt the control head of the motor and it seemed barely warm. Looks like I’ll have to resort to the manual to check why. (later: this icon indicates the motor is overheating. Makes sense – it is rated as a 4kw motor and 4500 watts is 12% overpowering it)<\/p>\n

Today I’m running the motor some more and at this moment the drawdown is 101 ah so the pack is about 50% discharged. The voltage is still good at 51v with a load of 1500 watts. Being on the dock, with the tide going out I’m running in reverse – in sync with the tidal flow. But its beginning to cavitate at this power so I’m not giving it more than this.<\/p>\n

All the terminals, connections and cables are cold – so there’s no high resistance ‘weak links’ this time.<\/p>\n

details in battery log<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Yesterday I was able to test for about 40 minutes… I gradually increased the power to 4500 watts and at all times the pack voltage and individual cell voltages stayed high. No sagging under load. So the problem was indeed a poor interconnection. At 4500 watts though I got a ‘thermometer’ icon on the Torqeedo … <\/p>\n

Continue reading “Battery test (cont)”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-219","post","type-post","status-publish","format-standard","hentry","category-electric-propulsion"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/currentsunshine.com\/index.php?rest_route=\/wp\/v2\/posts\/219","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/currentsunshine.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/currentsunshine.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/currentsunshine.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/currentsunshine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=219"}],"version-history":[{"count":9,"href":"https:\/\/currentsunshine.com\/index.php?rest_route=\/wp\/v2\/posts\/219\/revisions"}],"predecessor-version":[{"id":223,"href":"https:\/\/currentsunshine.com\/index.php?rest_route=\/wp\/v2\/posts\/219\/revisions\/223"}],"wp:attachment":[{"href":"https:\/\/currentsunshine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/currentsunshine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=219"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/currentsunshine.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}