#li-polymer

👉 На практике одинаково.

👇 В большинстве современных изделий литий-ионный и литий-полимерный аккумуляторы с кобальтовым катодом служат:

от 300 циклов (минимум) при самом интенсивном использовании или при грубом изготовлении поверхностных материалов (чистота компонентов);

до 1000 циклов (предел LCO) при больших физических размерах (тем дольше служит, чем больше размер и меньше глубина циклирования).

▶ Тип химии при этом не влияет на срок службы.

👇 Больше всего он зависит от:

температурных условий;

режима использования;

привычки заряжать батарею.

И если да, то применяется ли это как-то на практике?

✅ Существует для улучшения зарядников и химии. ✅ Применяется в протоколах зарядки, присадках, материалах.

Моделирование позволяет разрабатывать качественные зарядные устройства и изменять химический состав аккумуляторных батарей.

📈 Не выше +45°C. Иначе может привести к дальнейшему прогрессирующему нагреву и выходу из строя ячейки вплоть до самовоспламенения.

📉 Не ниже 0°C. Аккумулятор не замерзает, так как не содержит воды, но ток снижается тем больше, чем сильнее падает температура.

Dr. Ngalula Mubenga, assistant professor of electrical engineering technology at The University of Toledo, holding a battery cell next to the bilevel equalizer.

Credit: Dan Miller, The University of Toledo

An electrical engineer at The University of Toledo, who nearly died as a girl in Africa because of a hospital's lack of power, has developed a new energy storage solution to make battery packs in electric vehicles, satellites, planes and grid stations last longer and cost less.

The new technology called a bilevel equalizer is the first hybrid that combines the high performance of an active equalizer with the low cost of the passive equalizer.

"It's a game changer because we solved the weak cell issue in lithium ion battery storage for packs with hundreds of cells," said Dr. Ngalula Mubenga, assistant professor of electrical engineering technology at UT. "Whenever we are talking about batteries, we are talking about cells connected in a series. Over time, the battery is not balanced and limited by the weakest cell in the battery."

Before the bilevel equalizer, battery makers and automotive manufacturers balanced the cell voltages in a large battery pack using either a passive circuit, which loses more energy, or an active circuit, which is 10 times more expensive.

"In spite of their significant losses, passive equalizers are used in most applications because they are relatively simple and low cost," Mubenga said.

In Mubenga's new technology, the cells are grouped into sections. Each cell within the section is balanced by a passive equalizer, while the entire section is balanced by an active equalizer.

"If there are 120 cells in a battery, divide the cells into 10 groups of 12," Mubenga said. "Then you only need nine active equalizer units and 120 passive equalizer units using the bilevel equalizer. With current active equalizers, manufacturers would have to use 120 active equalizers. For manufacturers that can't afford to use only active equalizers, the bilevel equalizer is the solution to the problem."

Experiments have shown that the bilevel equalizer increases the discharge capacity of lithium ion batteries by about 30 percent, and the pack lasts longer because the cells are balanced.

"Instead of an electric vehicle's battery lasting only four years, it would last much longer," Mubenga said.

Mubenga worked on the project with Dr. Tom Stuart, professor emeritus in the UT Department of Electrical Engineering and Computer Science, who had the idea for the bilevel equalizer.

Their team is licensing the hybrid equalizer and retrofit kit to manufacturers. The research was recently published in Batteries, an international journal. Project funding was provided by the Ohio I-Corps program and Ohio Third Frontier program.

Mubenga plans to present their new, patented technology at 2 p.m. Wednesday, March 7 at the Advanced Design and Manufacturing Expo at the Huntington Convention Center of Cleveland in a session titled "Lowering the Cost of Energy Storage for E/HV and Grid Applications Using a Bilevel Equalizer for Large Li-Ion Batteries."

Mubenga understands the life-changing power of electricity. When she was 17 years old in her native country of the Democratic Republic of Congo in Africa, she waited three days for surgery after her appendix burst because there was no power at the hospital.

"I was living in a small town called Kikwit, far away from the big and beautiful capital city of Kinshasa," Mubenga said. "I was very sick, doctors needed to do surgery, but they couldn't find any gas to turn on the power generator. For three days, my life depended on electricity. I was praying. I could not eat. And decided if I made it alive, I would work to find a solution so people wouldn't die because of lack of electricity."

The hospital found fuel to power the generator, doctors did the surgery and Mubenga survived.

She started studying renewable energy at the UT College of Engineering in 2000 and earned a bachelor's degree, master's degree and PhD in electrical engineering. After earning her professional engineer license in Ohio, she went on to found her company called the SMIN Power Group, which develops and installs solar power systems in communities throughout the Democratic Republic of Congo.

"My passion is deep," Mubenga said. "In places like that small town of Kikwit, if you have solar power, you can have electricity and save lives."

Another factor fueling Mubenga's research motivation is a connection between her native country and lithium ion batteries.

Rechargeable Battery For GT08 Smart Watch

Features: Capacity:350mAh Shell material£ºPolymer Nominal Voltage:3.7V LimitedVoltage:4.2v Operating Temperature: Charge 0¡æ¡«45¡æ Discharge -20¡æ¡«60¡æ Storage -20¡æ¡«45¡æ Product size(L x W x H): 31mmx27mmx5mm Package Include: Battery * 1 Note : watches not included, only battery

Product Features

Compatible Model : GT08 Smart Watch

Capacity 350mAh

Size:31*27mm

Battery Type Li-ion,Li-polymer

Color:black

Asus ZenPad 3S 10 LTE Tablet With Snapdragon 650 SoC Launched

At its pre-IFA 2016 Zenvolution event in Sep, Asus launched the ZenPad 3S ten (Z500M) pill. Now, the corporate has launched its LTE variant. The Asus ZenPad 3S ten LTE (Z500KL) comes with 4G support, sports a stronger processor, and a bigger battery still. The pill is priced at MYR one,799 (roughly Rs. 28,000) in Malaysia, and comes bundled with a protective covering and custom stand. The Asus…