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Old citycar, alternator 65Ah, lead and LTO battery, some questions
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<blockquote data-quote="ch4" data-source="post: 8751361" data-attributes="member: 683357"><p>hi to everybody, i'm ch4 from Italy <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big grin :D" loading="lazy" data-shortname=":D" /></p><p></p><p>I have a old Fiat Panda 141, 1100 cm3, 55hp with an alternator of 65Ah</p><p></p><p>Ten years ago i had 4 38 with two zapco sp 3000.1 @ 0,5ohm, you can see a video here [MEDIA=youtube]FYWJB3oVCFg[/MEDIA]</p><p></p><p>It was very nice for me, we are talking about a car 3408*1494*1420 mm with 4 38 and it was my daily car <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big grin :D" loading="lazy" data-shortname=":D" /></p><p></p><p>But, it was not confortable, i had 440Ah AGM battery pack (200+120+120), there were very heavy (140kg) and i had to charge with a Ctek the batteries @14,7 volt every months and some negative spikes (11.8 volt or less)</p><p></p><p>It was 8 years ago last time that i used my Panda, now i have another car, but panda is still my favourite one, so i think that i will use it again, but with some modification</p><p></p><p>I still have midranges, tweeters, amplifiers and subwoofers, probably i will sell the two zapco 3000 to buy one taramps md8000 1ohm</p><p></p><p>About batteries, for sure i will not use AGM but lithium, i don't know if LiFePO4 or LTO, probably LTO ( Lishen 18 ah are very interesting)</p><p></p><p>But, i need also a lead battery for the elettric things of my car, so i had so use two different type of batteries</p><p></p><p>My idea is do something like in the chart</p><p>[ATTACH=full]30006[/ATTACH]</p><p></p><p></p><p>1) is the alternator, nothing special i think, very old and i'm sure that if i try to charge a lithium battery with it, it will die soon</p><p>2) lead battery, a stock lead battery, probably a 45Ah</p><p>7) all loads of car, light for example, working around 14 volt when the engine is on</p><p></p><p>3) dc dc converter boost 1800 watt , you can find it with google, i can set maximum/ mininum voltage and maximum current, i will set it in this way to charge lithium batteries</p><p>maximum voltage, considering lto 6s, around 15.5 volt</p><p>minimum voltage, around 12,7 volt, it will turn off itself when the voltage from the lead battery is lower than 12,7 volt</p><p>maximum current, around 25A, i don't want to stress too much my alternator</p><p></p><p>4) batteries with 25A BMS, LTO or LiFePO4, maybe 54Ah or 72Ah Lishen</p><p></p><p>5) all things connected with audio system: stereo and amplifiers</p><p></p><p>6) chassis of the car, basically the frame</p><p></p><p>I know perfectly that after 5 minutes the charge of my lithium batteries will be very low, but it's ok</p><p></p><p>What i would know is if my chart is correct or there are some mistakes...</p><p></p><p>For example, i'm not sure that i can connect between 4 and 5 only the positive and connect the negative of 5 to 6 (if i can, i will have half cable)</p><p></p><p>Let me know what you think about my chart and my idea, thanks</p></blockquote><p></p>
[QUOTE="ch4, post: 8751361, member: 683357"] hi to everybody, i'm ch4 from Italy :D I have a old Fiat Panda 141, 1100 cm3, 55hp with an alternator of 65Ah Ten years ago i had 4 38 with two zapco sp 3000.1 @ 0,5ohm, you can see a video here [MEDIA=youtube]FYWJB3oVCFg[/MEDIA] It was very nice for me, we are talking about a car 3408*1494*1420 mm with 4 38 and it was my daily car :D But, it was not confortable, i had 440Ah AGM battery pack (200+120+120), there were very heavy (140kg) and i had to charge with a Ctek the batteries @14,7 volt every months and some negative spikes (11.8 volt or less) It was 8 years ago last time that i used my Panda, now i have another car, but panda is still my favourite one, so i think that i will use it again, but with some modification I still have midranges, tweeters, amplifiers and subwoofers, probably i will sell the two zapco 3000 to buy one taramps md8000 1ohm About batteries, for sure i will not use AGM but lithium, i don't know if LiFePO4 or LTO, probably LTO ( Lishen 18 ah are very interesting) But, i need also a lead battery for the elettric things of my car, so i had so use two different type of batteries My idea is do something like in the chart [ATTACH type="full" alt="30006"]30006[/ATTACH] 1) is the alternator, nothing special i think, very old and i'm sure that if i try to charge a lithium battery with it, it will die soon 2) lead battery, a stock lead battery, probably a 45Ah 7) all loads of car, light for example, working around 14 volt when the engine is on 3) dc dc converter boost 1800 watt , you can find it with google, i can set maximum/ mininum voltage and maximum current, i will set it in this way to charge lithium batteries maximum voltage, considering lto 6s, around 15.5 volt minimum voltage, around 12,7 volt, it will turn off itself when the voltage from the lead battery is lower than 12,7 volt maximum current, around 25A, i don't want to stress too much my alternator 4) batteries with 25A BMS, LTO or LiFePO4, maybe 54Ah or 72Ah Lishen 5) all things connected with audio system: stereo and amplifiers 6) chassis of the car, basically the frame I know perfectly that after 5 minutes the charge of my lithium batteries will be very low, but it's ok What i would know is if my chart is correct or there are some mistakes... For example, i'm not sure that i can connect between 4 and 5 only the positive and connect the negative of 5 to 6 (if i can, i will have half cable) Let me know what you think about my chart and my idea, thanks [/QUOTE]
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Old citycar, alternator 65Ah, lead and LTO battery, some questions
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