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TypeS Lithium Jump starter

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frank3
Guest

Posted: Mon Jul 20, 2020 11:15 am Post subject: TypeS Lithium Jump starter

I was considering including a Ground Power Jack (Z-31A or B) in my RV with a fuel injected engine.    

         

    

         After watching a fella use a TypeS Lithium Jump Starter.(12v with up to 8k mAh, 350A peak current) to jump start a GMC SUV, I wonder about its application to my RV.  It is very light weight and measures 7x3x1"; marketed as "Safe Jumper Cable protects against polarity, over-discharge, low voltage, reverse charging, short-circuit, overheat, spark-proof, and timing out."    

         

    

         I wonder if I could have two terminals (maybe an ANL block) in the cockpit area, one wired to the battery/firewall ground and the other to the battery contactor (bat side), forgoing the ground power contactor?  The 4 AWG wire length less than 2 ft.  As needed the jumper cables from the TypeS could be applied internally in flight or on the ground.  With this "smart" device, would it be safe to have these fat wires in the cabin and without circuit protection?    

         

    

               My thought is to have it available (especially on trip to isolated airstrips) as needed for jump start and possibly use as inflight backup battery???     

           

     

           My electrical system will be single battery & alternator with an E Buss.     

           

     

    

         Does any of this make sense?    

         

    

         Thanks in advance for your input.    

         

    

         Frank

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user9253

Joined: 28 Mar 2008
Posts: 1908
Location: Riley TWP Michigan

Posted: Mon Jul 20, 2020 1:23 pm Post subject: Re: TypeS Lithium Jump starter

A battery does not necessarily need protecting with a fuse.  But the pilot

should have the means to shut off all sources of electrical power at the source.

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Joe Gores

rparigoris

Joined: 24 Nov 2009
Posts: 780

Posted: Tue Jul 21, 2020 10:31 am Post subject: Re: TypeS Lithium Jump starter

Hi Group

A note on jump starter packs. I purchased a 4,000amp 12 volt  jump starter a while back. I was working on a project and needed 1,500 watts for 15 seconds (a little less than 140 amps) and not go below 10.9 volts. Although after speaking with mfg. they did indeed test and saw 4,000 amps, it was for some nanosecond at some way low voltage. Here's the real poop: it could hardly hold up 35 amps for 15 seconds!

https://www.northerntool.com/shop/tools/product_200676383_200676383



Their# is 216-464-8131



Their 4,000 amp unit can put out ~ 40 amps for 3 seconds at minimum of 10.9 volts, after 15 seconds down to ~35 amps and if it were cold probably 20 or 25 amps.



The battery is only 8aH.



Ron P.

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nuckolls.bob(at)aeroelect
Guest

Posted: Tue Jul 21, 2020 7:13 pm Post subject: TypeS Lithium Jump starter

At 01:31 PM 7/21/2020, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com>



 Hi Group

 A note on jump starter packs. I purchased a 4,000amp 12 volt  jump starter a while back. I was working on a project and needed 1,500 watts for 15 seconds (a little less than 140 amps) and not go below 10.9 volts. Although after speaking with mfg. they did indeed test and saw 4,000 amps, it was for some nanosecond at some way low voltage. Here's the real poop: it could hardly hold up 35 amps for 15 seconds!

  https://www.northerntool.com/shop/tools/product_200676383_200676383 	


   Yeah, there's been a host of similar products

   with similar track records. Some of you may

   remember the sensational Bolder Technologies,

   thin metal film jelly-roll cells that caused

   a big stir about 22 years ago:



  https://tinyurl.com/yyw6a6j6



  https://tinyurl.com/y42v9ztj



  https://tinyurl.com/mu8oe6c



   We had a sample array of cells in a 12v

   configuration test at B&C about a year

   or so earlier. Yup, those 2 A.h. cells

   would dump current at over 400A when

   loaded down to 9v!



   They had a boat load of manufacturing

   process problems to solve and never quite

   made it. I think the company has been

   sold several times and presently languishes

   in India?



   But just because a cell is small does not

   necessarily mean it's not up to the stated

   task. Take the EarthX product I published

   test data on a few days ago. After 6+ years

   the battery still stores 10+ a.h. of energy.

   When loaded to 9v this morning, it still

   offered respectable 400+ amps of cranking

   current.



   The cell's robustness is exceedingly

   sensitive to production and design variables.

   The smaller the cell, the greater the 

   sensitivity. EarthX appears to have their

   ducks marching along in good order.



   But as Ron has illustrated, not everyone

   is so talented.



 



 

 

   Bob . . .

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