/>

Inside Samsung's Galaxy Note 7 testing lab

Samsung set up special facilities to discover what caused its phone to overheat. Here's a look inside.

img-4770
Shara_Tibken.jpg
James Martin, Shara Tibken
1 of 18 Samsung

Samsung's large scale battery testing facility in Gumi, South Korea. As part of a new eight-point safety check, Samsung will implement more frequent battery testing, including overcharging tests, nail puncture tests, and extreme temperature stress testing.

4hw-investigationwireless-charging.jpg
2 of 18 Samsung

Running battery tests that examine the impact of wireless charging on the Note 7.

7hw-investigationusb-type-c.jpg
3 of 18 Samsung

Testing USB-C battery charging inside Samsung's labs.

8swsoftware-algorithm-check1.jpg
4 of 18 Samsung

In addition to hardware battery tests, the rigorous process looked at the role software algorithms played as well.

9swsoftware-algorithm-check2.jpg
5 of 18 Samsung

More software algorithm testing as Samsung undertakes a comprehensive review of its troubled batteries.

108-point-battery-safety-checkdurability-testedge-bar-test.jpg
6 of 18 Samsung

As part of the eight-point battery safety check, a Note 7 undergoes a durability test.

118-point-battery-safety-checkdurability-testpenetration-test.jpg
7 of 18 Samsung

A battery penetration test in Samsung's labs as part of the company's durability inspection.

128-point-battery-safety-checkdurability-testcompression-test.jpg
8 of 18 Samsung

Compression testing on Samsung's batteries as part of a widespread review of the battery's durability.

138-point-battery-safety-checkdurability-testlife-cycle-test.jpg
9 of 18 Samsung

A battery life cycle test which is part of Samsung's eight-point battery safety check.

148-point-battery-safety-checkvisual-inspection.jpg
10 of 18 Samsung

A visual inspection of Samsung's batteries to check for flaws.

158-point-battery-safety-checkx-ray.jpg
11 of 18 Samsung

An X-Ray machine looks inside Samsung's batteries, checking for any abnormalities as part of the eight point safety check.

168-point-battery-safety-checktvoc.jpg
12 of 18 Samsung

The TVOC testing ensures there isn't any possibility of leakage of the battery component.

178-point-battery-safety-checkdisasasembling-test.jpg
13 of 18 Samsung

Breaking down a battery to take a look at every component is now part of Samsung's battery safety process. This process assesses its overall quality, including the battery tab welding and conditions of insulation tape.

188-point-battery-safety-checkocv.jpg
14 of 18 Samsung

OCV testing, seen here, checks for any change in voltage throughout the manufacturing process from component level to complete device.

galaxy-battery-slide-1.jpg
15 of 18

Samsung discovered the two different batteries provided by its two different suppliers both had problems.

galaxy-battery-slide-2.jpg
16 of 18

Samsung explained the issues by showing what a lithium-ion battery looks like internally.

infographic-galaxy-note7-what-we-discovered.jpg
17 of 18 Samsung

Samsung discovered some design flaws with Battery A, a battery from the supplier that led to the Note 7's first recall.

galaxy-battery-slide-5.jpg
18 of 18

Battery B had some manufacturing issues. When the supplier increased its production to meet Samsung's demand, it introduced some errors into the process that caused the battery to short circuit.

More Galleries

Nintendo Switch: The 36 best games to play in 2021

More Galleries

Nintendo Switch: The 36 best games to play in 2021

37 Photos
55 weird objects seen on Mars, explained

More Galleries

55 weird objects seen on Mars, explained

57 Photos
Volkswagen's new T7 Multivan looks awesome

More Galleries

Volkswagen's new T7 Multivan looks awesome

10 Photos
2022 Kia Telluride looks basically the same as before

More Galleries

2022 Kia Telluride looks basically the same as before

18 Photos
Toyota Land Cruiser J300 flagship is now forbidden fruit

More Galleries

Toyota Land Cruiser J300 flagship is now forbidden fruit

17 Photos
2022 Ford Maverick: This super-affordable hybrid pickup could be a gamechanger

More Galleries

2022 Ford Maverick: This super-affordable hybrid pickup could be a gamechanger

66 Photos
2022 Honda Civic: Sharper performance and a revolutionary cabin

More Galleries

2022 Honda Civic: Sharper performance and a revolutionary cabin

69 Photos