Blog - Tests and diagnosis

GWL 40AH LTO Capacity Tests

The charge and discharge diagram for the LTO 40AH cells.

Customer requested to prove the real capacity before the shipment. We are happy to demonstrate that the cells meet the specifications as declared.

04.Feb 2020
| Blog - Tests and diagnosis

Overcharge of the TSWB cell

The diagram shows the overcharge of the TSWB cell and the temperature increase.

The cell is overcharged (after already being fully charged) gradually to 5V, 6V and 8V per cell. The temperature is monitored. The temperature reaches some 130*C.

The total time of the test is 30 minutes. During the test

06.Nov 2019
| Blog - Tests and diagnosis

Puncture test calb

CALB SE Series Puncture Test (video)

Result is simple: 100% save - no fire, no explosion, no overheating, no burning of the plastic case. Only the smoke from inside the cell caused by the internal short-circuit. ()

21.Jun 2019
| Blog - Tests and diagnosis

SLA vs LFP battery extreme...

What is the difference between SLA and Lithium Iron Phosphate (LiFePO4, LFP)? One of the most frequent questions now answered. Rather extreme discharge test of two SLA and Winston 12V battery.

About Winston batteries: Large capacity LiFePO4 prismatic cells and batteries. Thundersky – Winston Ba

21.Jun 2019
| Blog - Tests and diagnosis

SLA vs. LiFePo4 (LFP) battery,...

What is the difference between SLA and Lithium Iron Phosphate (LiFePO4, LFP)? One of the most frequent questions now answered. Rather extreme discharge test of two SLA and Winston 12V battery.

About Winston batteries: Large capacity LiFePO4 prismatic cells and batteries. Thundersky – Winston Ba

10.Jun 2019
| Blog - Tests and diagnosis

Swollen battery – Use or not...

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...

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...

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...

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...

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
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