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  1. #1
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    Default Electrical Question: 7.4V pump with SPyder 12V system

    I bought a Cycle Chiller system which sounds like a great idea. The problem is the pump is 7.4V and I have read that running an item that has lower voltage on a higher voltage system can damage the item. In this case the pump. Of course, since this system is made for persons with motorcycles and The four I have owned have all been 12V systems, Iím wondering why the company did this. They even provided a system to connect directly to the battery using SAE connectors or to a cigarette lighter that is 12V.

    Iíve actually had one pump go out and company sent a battery saying I am the first to connect to a Spyder with the system and suggesting it may be the power of the system. I can run wires and stuff like that but I do not know all the ins and outs of these things so your help will be appreciated.

  2. #2
    Very Active Member trikermutha's Avatar
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    How do you sell a system that cant handle 12 VDC? And to keep in mind it wont be 12VDC once running it will be higher since the alternator will be running.

  3. #3
    Very Active Member Joe T.'s Avatar
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    Default Cycle Chiller Batteries

    You probably need to be using Lithium Polymer (Lithium Ion) batteries. Each single cell is 3.7V. Two cells equal 7.4V. You can buy single cell, 2 cell, 3 cell, etc.

    I use them all of the time for my electric RC airplanes.

    Here is an example of a 2-cell Lithium Polymer battery made for RC planes, helicopters, cars, etc. The

    https://hobbyking.com/en_us/turnigy-...en_us_products

    The terminology is:

    1300 mAH = 1.3 Amp Hours Capacity
    2S = 2 cell in Series
    20C = Discharge Rate

    However, I would strongly suggest you contact Cycle Chillers and ask them what batteries you need. The photo seems to have large plugs for the battery. I could not find anything regarding batteries on their site.

    Good luck!

    Joe T.

    OK,

    I looked at their site a bit more. You can buy the battery needed and a charger for ~$40. They are Lithium Ion batteries. But, I bet today they are Lithium Polymer batteries. They are interchangeable. Extra batteries are available, too.


    https://cyclechillers.com/product/battery-and-charger/

    Joe T.
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  4. #4
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    You need a Waterproof Dc-dc Converter 12v to 7.5v Step Down Power Supply Module shouldn't be more than five or ten $ on Amazon or ebay check amps draw of pump to make sure you order the right converter. You want one the same amps as the pump or higher .7b42d732-ad28-44f4-9fc9-2a4f53cc56b0.jpg

  5. #5
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    I did get a lithium battery that is 7.4 volts. I’m thinking they may actually have wanted that to be the case. However, the coverter (ddjim) would be great since then I do nto have to worry about running out of power.

    Thanks for all the responses. I’ve learned a few things.

  6. #6
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    Quote Originally Posted by Brainsprain View Post
    I did get a lithium battery that is 7.4 volts. Iím thinking they may actually have wanted that to be the case. However, the coverter (ddjim) would be great since then I do nto have to worry about running out of power.

    Thanks for all the responses. Iíve learned a few things.
    Hook the Dc-dc Converter up to the Customer Accessory Circuit not directly to the battery so the converter powers up with the engine running and doesn't drain the battery

  7. #7
    Very Active Member Joe T.'s Avatar
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    Quote Originally Posted by Brainsprain View Post
    I did get a lithium battery that is 7.4 volts. Iím thinking they may actually have wanted that to be the case. However, the coverter (ddjim) would be great since then I do nto have to worry about running out of power.

    Thanks for all the responses. Iíve learned a few things.
    Did you check out the recommended battery? You can have more than one battery for use if you need more than 8 hours of cooling.

    https://cyclechillers.com/product/battery-and-charger/

    I'm not sure why you would risk the electrical system of a VERY EXPENSIVE motorcycle when you can solve your problem for ~$40.

    Regards,
    Joe T.
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  8. #8
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    I wasn’t planning on risking the electrical system of the motorcycle. I was asking a question about voltage etc.

  9. #9
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    I knew that, but I was wondering about the voltage issue because they sent the cigarette lighter adapter that has nothing on it about converting to 7.4 volts.

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