Re: [AFMUG] Interesting battery backup development..

[Eric Kuhnke]

I wonder if that thing from China is any good if they build it with Matsushita (Panasonic) 18650 cells in packs. Does the battery management controller suck? 4RU high for 2.4 kWh capacity is not so bad compared to a lead acid battery shelf. If they really want to sell that thing to telecoms it needs to have center mounting points, to install in standard two post 19" racks, with half the weight hanging out over the front, half over the rear. On 10/7/15 5:41 PM, Lewis Bergman wrote: Chinese cells bite. In the two way batteries they last about 1/3 as long, durability wise and never perform to rated capacity. Japanese cells in the other hand, top notch. On Wed, Oct 7, 2015, 7:33 PM Peter Kranz <pkr...@unwiredltd.com> wrote: I wonder why that China module is 50Ah.. while the C&D provides such a higher energy density. 170Ah..   Peter Kranz www.UnwiredLtd.com Desk: 510-868-1614 x100 Mobile: 510-207-0000 pkr...@unwiredltd.com   From: Af [mailto:af-boun...@afmug.com] On Behalf Of Eric Kuhnke Sent: Wednesday, October 07, 2015 5:27 PM To: af@afmug.com Subject: Re: [AFMUG] Interesting battery backup development..   random thing from china: http://jycbattery.en.alibaba.com/product/60242486785-801546525/New_4U_48V_50Ah_Telecom_Backup_LiFePO4_Lithium_ion_polymer_Battery.html search alibaba for 48V lithium ion and you will find more. I am highly skeptical of the quality of the cells they're using, considering the cost difference between "cheap" 18650 cells and Panasonic or Sony. On 10/7/15 5:16 PM, Bill Prince wrote: C&D Technologies: https://www.cdtechno.com/product/lithium/lithium.html bp <part15sbs{at}gmail{dot}com>   On 10/7/2015 5:15 PM, Eric Kuhnke wrote: I bet it's intended for electric buses and similar. Those are labeled CAN, guessing CANbus http://www.kvaser.com/about-can/the-can-protocol/ https://en.wikipedia.org/wiki/CAN_bus tl;dr: it's a messy clusterfuck networking standard that's worse than RS485 and doesn't speak IP On 10/7/15 5:11 PM, Bill Prince wrote: ~~ 7,000 watt-hours. Not bad. Is it just a battery? What's available on the two ethernet ports and USB port? bp <part15sbs{at}gmail{dot}com>   On 10/7/2015 4:59 PM, Peter Kranz wrote: Check this out.. 48V 160Ah Lithium battery module.. I�m thinking this could be a very interesting alternative to our current telcom battery based backup solution. I think I can double my run-time in a smaller form factor. Looking into costs. � � Peter Kranz www.UnwiredLtd.com Desk: 510-868-1614 x100 Mobile: 510-207-0000 pkr...@unwiredltd.com �