Blog - Battery Monitoring

FAQ: Will my LFP batteries last really that long?

Even in 2021, there are customers who are just starting with the lithium battery technology. One of the most frequent questions is:“How long will my batteries last?”

Here, we have the answer from a real demonstration. The photo shows the test ofthe 12V battery pack by Winston Thunde

The law of nature is always valid – the power of the cells

Question: I wish to compare three cells from different producers. All three of them havethe same 100Ah capacity, however one is 3.6 kg, the other is 2.75 kg and the third is only 1.98 kg. How to explain this?

Answer:Well, the higher the mass of the cell, the more powerful and more reliab

A New Baby is on The Way

This is the first public photo of aUltimate Battery Control Systemthat is being developed in GWL together with a local partner company.

More details to follow….

GWL/Modular - BMS Basic

The primary setup of the GWL/Modular components as BMS-Basic.

The BMS Basic provides the “basic” or primary protection of the battery pack up to 16 cells. The management of the battery pack is handle by the CPM1 board.

The GWL/Modular Solution in Action

One of the main advantages of theGWL/Modular solution is that it comes with a complete set of documentation. The goal of this concept is that the product is fully replicable and serviceable at any location of the world by the local skilled electricians.

This is the difference between the Modular –

Details of the Emergency Output for CPM1

Pin # 1 - Main Turn-on Impulse- 150 ms pulse to GND

The pin will be connected to GND for 150 ms when the board is powered on, or after the board has been reset (and restarted).

This pin is designed to give an impulse to the bistable relay or to give a power-on impulse to the auxiliary controls

The CPM1 Emergency Voltage Levels

The Emergency Voltage levels [U Emergency] are 0.3V bellow theUminand 0.3V above theUmaxlevels. They become active if the voltage of any cells reaches these levels for 30 seconds.

U Emergency (Min)

LFP: 2.5V, 2.6V, 2.7V, 2.8V

LTO: 1.4V, 1.5V, 1.6V, 1.7V

U Emergency (Max)

LF

Dogma: The energy of the regular “AA” cells = 1.43Wh

The AA cells are the primary one-time use cells. The nominal voltage ofthe AA cells is 1.5Vand their capacity in Ah usually not stated in the specification.It shows that people are fooled easily. ????

Image: you buy the milk in some box every day, but you never now how much liter

Integration of the GWL/Modular with Victron Energy products

The reference of theshows the possibility of the integration of the GWL/Modular components with theVictron Energy products.

In this installation the CPM1 communicates (by means of auxiliary relays) with theAUX1 and AUX2 of Victron Multiplus, and the

GWL/Modular - BMS SC Setup

The basic wiring diagram for the BMS SC setup. In this setup, there is theBCC communication moduleadded to theCPM1. There arethat respond to Umin, Umax, Uemergency and the controlling signal from BCC. There is also a 3-LED status for the condition of