Electrical Question: 7.4V pump with SPyder 12V system

[Brainsprain]

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, I’m 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.

I’ve 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.

[trikermutha]

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.

[Joe T.]

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.

[ddjim]

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

[Brainsprain]

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.

[ddjim]

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.

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

[Joe T.]

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.

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.

[Brainsprain]

I wasn’t planning on risking the electrical system of the motorcycle. I was asking a question about voltage etc.

[Brainsprain]

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.