Blog - Tests and diagnosis

Swollen battery – Use or not to Use?

Question:We have a set of battery packs. We have noticed that in one of the packs the cells bulked and changed the shape.Is it safe to keep using the battery pack?

Answer: Generally said if there is any change of the shape of the case of the cells it indicates thatthere is some issue with the

30.May 2019
| Blog - Tests and diagnosis

GWL Battery Abuse Test Station – Sneak peek

GWL/Power team is carrying out the LFP cell abuse tests. We have constructed the Battery Abuse Test Station that consists of following main parts:

1) Equipment table – the measuring equipment is installed here

2) Mechanical abuse location – a block of concrete to be used as a plac

16.Apr 2019
| Blog - Tests and diagnosis

Raspberry Pi BMS communication module

Do you need to know how much capacity remains in your battery? Stay tuned - during Q3/2019 we will announce a communication modulebased on Raspberry Pi project. Together with our CPM1 board, it will bring you information about SoC and DoD of any battery pack from 4 to 16 LiFePO4 cells. It will a

16.Mar 2019
| Blog - Tests and diagnosis

Winston cells passed the China Army military safety tests

The photo shows the punch-through simulating a shooting from 45 mm calibre anti-tank gun.

Fully charged cells are punched through simulating the shoot-through from a military weapon. The purpose of the test is to see the safety and stability of the lithium cells.

As visible from the photo, the cells re

04.Mar 2019
| Blog - Tests and diagnosis

What is the Peukert’s Exponent for LiFePO4 cells?

The is used for the lead-acid batteries. Simply said this exponent is the ratio between the charging and discharging of a battery. It means how much energy you need to charge compared to the energy you get when discharging.

For the LiFePO4 cells, the efficiency of the charge and dis

28.Feb 2019
| Blog - Tests and diagnosis

How to calculate the cost of stored energy in a LiFePO4...

Lead Acid or LiFePO4? This is the price per kWh stored and cycle life comparison. The two following graphs will show you the comparison between the Lead Acid and LiFePO4 batteries. The first one compares the average number of cycles (cycle life) according to the battery type and a depth of discharge. The se

20.Jan 2019
| Blog - Tests and diagnosis

Three million AH - Sinopoly Test Data and Project Reference

Check the update for the Sinopoly Test Data for the test of the 200AH cell.

See the project reference using the Sinopoly battery products.

See more here at special page:

19.Dec 2017
| Blog - Tests and diagnosis

Determining the number of cells for a battery pack

Question: I need a 100V DC pack. How many cells do I need (for LFP or for LTO)?

Answer:The above table shows the various configurations of the number of the cells and the voltage levels that will be reached with the configuration.

For a 100V pack, the typical installation will

09.Nov 2017
| Blog - Tests and diagnosis

LTO cell test results

The diagrams show the test results of the specifications of the LTO cells.

  • Charge and discharge characteristicsat different rates
  • Discharge characteristics at differenttemperatures
  • Discharge characteristics measuredin time scope

We will be happy to provide these c

07.Nov 2017
| Blog - Tests and diagnosis

Internal resistence

The value of the internal resistance

Question:In your promotional materials you mention several times that the internal resistance of the LTO cells is“very low”,“lower than for the LFP cells”, is“only 1 mOhm and less”. However we have tested

03.Nov 2017
| Blog - Tests and diagnosis
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