The lynx system is a modular DC bus bar system used to connect batteries, DC equipment and provide fusing and battery monitoring. It consists of the following modules:
You can use the Lynx Distributor or Lynx Power In without the Lynx Shunt.
Information on these 3 parts can be found below, but also in this manual
The lynx power in module is used to connect batteries. It contains a negative and positive DC bus-bar with M8 bolts in which to connect batteries cables.
The Lynx shunt contains a positive bus-bar with space to mount a fuse and a negative bus-bar with a shunt. It also contains battery monitor electronics. The Lynx shunt can send via the VE.CAN bus battery motoring information to a CCGX or VGX or to a third party can bus monitoring system, such as a NMEA2000 (check with Johannes). The CCGX, VGX or third party display acts as battery monitor display and is also used to set up the built-in batter monitor.
The Lynx shunt is available in two models:
CIP140325000 - Fuse CNN 325A/80V for Lynx shunt
Or alternatively a CNN fuses by Littlefuse can be used. The CNN fuse is a 48 Vdc Fast fuse and is available up to 800A.
Rated at 1000 A
Setup is like setting up a BMV and this is done via the CCGX or VGX.
To find out the meaning of the various settings, please see the BMV manual
Please don’t use the 2-pin terminal block on the Lynx-shunt.
FAQ Q Is there a way of setting the battery instance? A There is a program available to change this but as the default is 0, which is the same as what a CCGX reads we would not advise changing this!!
Batteries are special. They are both a source and destination of energy.
Power can flow from them to a load (or a fault). It can also flow to them from a charge source (eg other batteries or solar).
It is important that in cases where batteries are combined, and there is the opportunity for current to flow from one connection to another in fault, that there is sufficient and robust circuit protection.
For example, the BYD Lithium IP55 cabinets.
In this case the 4 module battery cabinets are each protected by individual 85A circuit breakers and also collectively protected by a 125A circuit breaker at the cabinet end.
These cabinets are then connected through the Lynx Distributor, and those main battery take off wires are connected at the Bus end by another 125A MEGA fuse.
Both the 125A circuit breaker and the 125A fuse are as close as possible to their respective sources of current. The battery cells, where the internal wire is protected inside the cabinet. And the shared bus bar (where current can flow from other batteries or a charge source).
This means that if there is a short circuit fault somewhere along the battery cabinet take off cable, there is sufficient protection.
Without the 125A bus bar MEGA fuse. There is the possibility of the battery take off cables fault that the 125A cabinet circuit breaker trips, but that the fault is continued by the supply of the other batteries (up to their combined 375A) and this exceeds the current rating of the cable to the fault and starts a fire.
This is an unlikely scenario, but consequences of a fire in an energy storage situation are so serious that it is a recommended level of protection.
Contains positive and negative bus-bar and provides a connection for for 4 individual DC equipment or load or DC groups. It has a space for a individual DC fuses per DC group and a led for each fuse to indicate if fuse is blown.
Uses MEGA fuses. Please note that some MEGA fuses are only rated to 36Volt (suitable for 24V systems), You must use 58/64V rated fuses for 48V systems.
Connectors and dip-switches:
FAQ Q There is a small 4-pin cable shipped with the Distributor - I can only assume that the cable interconnects between the Shunt and Distributor? A Yes, but this has only to power the LED’s on the distributor, there is no other function for this at the moment.
Q The Distributer has a DIP switch. What are the settings? A That’s for manual settings, please don’t touch as the system will auto configure (up to 32 battery’s )
Q The Distributer has a 6-pin header block. What is it for? A read out of fuses, not supported yet.
Here are some images from customer's installations that may help you to understand the installation of the Lynx System.