scholarly journals Bilevel vs. Passive Equalizers for Second Life EV Batteries

Electricity ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 63-76
Author(s):  
Ngalula Sandrine Mubenga ◽  
Boluwatito Salami ◽  
Thomas Stuart
Keyword(s):  
Electric Vehicles ◽  
Second Life ◽  
Lower Cost ◽  
Lithium Ion ◽  
Cost Effective ◽  
The Other ◽  
Capacity Fade ◽  
Battery Capacity ◽  
Energy Storage Applications ◽  
Cell Average

Once lithium-ion batteries degrade to below about 80% of their original capacity, they are no longer considered satisfactory for electric vehicles (EVs), but they are still adequate for second-life energy storage applications. However, once this level is reached, capacity fade increases at a much faster rate, and the spread between the cell capacities becomes much wider. If the passive equalizer (PEQ) from the EV is still used, battery capacity remains equal to that of the worst cell in the stack, just like it was in the EV. Unfortunately, the worst cell eventually becomes much weaker than the cell average, and the other cells are not fully utilized. If operated while the battery is in use, an active equalizer (AEQ) can increase the battery capacity to a much higher value close to the cell average, but AEQs are much more expensive and are not considered cost effective. However, it can be shown that the bilevel equalizer (BEQ), a PEQ/AEQ hybrid, also can provide a capacity very close to the cell average and at a much lower cost than an AEQ.

scholarly journals Charge and Discharge Behaviour of Li-Ion Batteries at Various Temperatures Containing LiCoO2 Nanostructured Cathode Produced by CCSO

2015 ◽  
Vol 15 (4) ◽  
pp. 301 ◽  
Author(s):  
Y.Y. Mamyrbayeva ◽  
R.E. Beissenov ◽  
M.A. Hobosyan ◽  
S.E. Kumekov ◽  
K.S. Martirosyan
Keyword(s):  
Lithium Ion Battery ◽  
Active Material ◽  
Lithium Ion ◽  
Synthetic Approach ◽  
Capacity Fade ◽  
Li Ion Batteries ◽  
Material Loss ◽  
Method Performance ◽  
Battery Capacity ◽  
Li Ion

<p>There are technical barriers for penetration market requesting rechargeable lithium-ion battery packs for portable devices that operate in extreme hot and cold environments. Many portable electronics are used in very cold (-40 °C) environments, and many medical devices need batteries that operate at high temperatures. Conventional Li-ion batteries start to suffer as the temperature drops below 0 °C and the internal impedance of the battery  increases. Battery capacity also reduced during the higher/lower temperatures. The present work describes the laboratory made lithium ion battery behaviour features at different operation temperatures. The pouch-type battery was prepared by exploiting LiCoO<sub>2</sub> cathode material synthesized by novel synthetic approach referred as Carbon Combustion Synthesis of Oxides (CCSO). The main goal of this paper focuses on evaluation of the efficiency of positive electrode produced by CCSO method. Performance studies of battery showed that the capacity fade of pouch type battery increases with increase in temperature. The experimental results demonstrate the dramatic effects on cell self-heating upon electrochemical performance. The study involves an extensive analysis of discharge and charge characteristics of battery at each temperature following 30 cycles. After 10 cycles, the battery cycled at RT and 45 °C showed, the capacity fade of 20% and 25% respectively. The discharge capacity for the battery cycled at 25 °C was found to be higher when compared with the battery cycled at 0 °C and 45 °C. The capacity of the battery also decreases when cycling at low temperatures. It was important time to charge the battery was only 2.5 hours to obtain identical nominal capacity under the charging protocol. The decrease capability of battery cycled at high temperature can be explained with secondary active material loss dominating the other losses.</p>

Supply limitations will boost lithium for now

2017 ◽  
Keyword(s):  
Lithium Ion Battery ◽  
Electric Vehicles ◽  
Power Plants ◽  
Lithium Ion ◽  
Consumer Electronics ◽  
Content Type ◽  
Tenfold Increase ◽  
Battery Capacity ◽  
Vehicle Production ◽  
First Time

Subject Lithium market Significance Lithium consumption by the battery sector is expected to outstrip traditional sources of demand for the first time this year. Over the next three years, around 70% of the increase in incremental demand for lithium is expected to be driven by growth of electric vehicle production. However, after nearly doubling over the last five years, the pace of growth of lithium demand from the consumer-electronics sector is likely to slow. Impacts Several ventures are investigating lithium clay projects as a by-product of geothermal power plants, but these are untested commercially. Many lithium deposits contain harmful materials and research will continue into ways of safely extracting these materials. Lithium-ion battery capacity needs to add 600 gigawatt hours or 60 billion dollars investment to achieve 30% vehicle sector penetration. Beijing has established a new sales target of 7 million electric vehicles for 2025, which would represent a tenfold increase on 2016.

Maintaining a Constant Charging Duration Independent of Battery Capacity for Battery Pack by Designing a Fast DC Charger

2019 ◽  
Vol 8 (3) ◽  
pp. 102-116
Author(s):  
Bassam Atieh ◽  
Mohammad Fouad Al-sammak
Keyword(s):  
Lower Cost ◽  
Lithium Ion ◽  
Power Source ◽  
Battery Pack ◽  
Simulation Environment ◽  
Electronic Components ◽  
Battery Capacity ◽  
Li Ion ◽  
Novel Strategy ◽  
Usage Flexibility

This article proposes a novel strategy for developing a new structure for a lithium-ion battery pack fast charger which aims to achieve fast DC charging, based on the topology of a boost converter. The proposed charger has been designed considering using fewer electronic components at lower cost. Varying initial charging percentage of the Li-ion cells has not been addressed in this article, an equal initial charging percentage of each Li-ion cell is assumed. Performance of the proposed structure of the charger has been tested using a simulation environment. This strategy has shown that this structure ensures scalability of this charger, while using the utility grid (220V, 50Hz) as a main power source for this charger has ensured practical usage flexibility. The results of this research are presented and discussed. These results have shown the outstanding performance and response of this charger.

scholarly journals Electric vehicle battery reuse: Preparing for a second life

2017 ◽  
Vol 10 (2) ◽  
pp. 266 ◽  
Author(s):  
Lluc Canals Casals ◽  
Beatriz Amante García ◽  
Lázaro V. Cremades
Keyword(s):  
End Of Life ◽  
Electric Vehicle ◽  
Electric Vehicles ◽  
Second Life ◽  
High Capacity ◽  
State Of Health ◽  
Battery Capacity ◽  
Strong Relation ◽  
Battery Technology ◽  
Vehicle Market

Purpose: On pursue of economic revenue, the second life of electric vehicle batteries is closer to reality. Common electric vehicles reach the end of life when batteries loss between a 20 or 30% of its capacity. However, battery technology is evolving fast and the next generation of electric vehicles will have between 300 and 400 km range. This study will analyze different End of Life scenarios according to battery capacity and their possible second life’s opportunities. Additionally, an analysis of the electric vehicle market will define possible locations for battery repurposing or remanufacturing plants.Design/methodology/approach: Calculating the barycenter of the electric vehicle market offers an optimal location to settle the battery repurposing plant from a logistic and environmental perspective.This paper presents several possible applications and remanufacture processes of EV batteries according to the state of health after their collection, analyzing both the direct reuse of the battery and the module dismantling strategy.Findings: The study presents that Netherlands is the best location for installing a battery repurposing plant because of its closeness to EV manufacturers and the potential European EV markets, observing a strong relation between the EV market share and the income per capita.15% of the batteries may be send back to the an EV as a reposition battery, 60% will be prepared for stationary or high capacity installations such as grid services, residential use, Hybrid trucks or electric boats, and finally, the remaining 25% is to be dismantled into modules or cells for smaller applications, such as bicycles or assisting robots.Originality/value: Most of studies related to the EV battery reuse take for granted that they will all have an 80% of its capacity. This study analyzes and proposes a distribution of battery reception and presents different 2nd life alternatives according to their state of health.

A cost effective accumulator management system for electric vehicles

2020 ◽  
Vol 21 (3) ◽  
Author(s):  
Suchitra D ◽  
Rajarajeswari R ◽  
Dhruv Singh Bhati
Keyword(s):  
Electric Vehicles ◽  
Management System ◽  
Lithium Ion ◽  
Cost Effective ◽  
Battery Management System ◽  
Battery Management ◽  
Cell Parameters ◽  
Battery Design ◽  
Battery Packs ◽  
Cost Efficient

AbstractAn accumulator or battery is an energy storage cramped in an adaptable stockade. Lithium-ion batteries are commonly used in hybrid electric vehicles (HEV) and battery operated electric vehicles (BOEV) due to its eco-friendliness and increased efficiency. To maintain lithium batteries in the safe operating region and also to perform tasks like cell balancing, preventing thermal runaway, maintain the state of health, an effective battery management system (BMS) is required. The BMS should also communicate effectively between host devices and battery packs. This paper proposes a reliable, modular and cost-efficient BMS, which will emanate an alert when a fault occurs and thus preventing the battery from damage. An efficient control strategy has been proposed for charging and discharging of the battery pack. The thermal analysis of the lithium-ion battery used in this work is simulated using battery design studio (BDS) with the inclusion of a self-discharging effect. The proposed hardware setup also provides a provision for on-board diagnosis (OBD) and logging in the accumulator management system (AMS) to constantly monitor the cell parameters like voltage, current, and temperature. The live data display of AMS working is also shown during abnormal and normal conditions. Also, an attempt is made to use the design of proposed AMS for HEV.

scholarly journals Design and Fabrication of Electric Motorcycle

2021 ◽  
pp. 124-131
Author(s):  
Jagdish Keshav Khade
Keyword(s):  
Lithium Ion Battery ◽  
Electric Vehicles ◽  
Direct Current ◽  
Carrying Capacity ◽  
Combustion Engine ◽  
Lithium Ion ◽  
Cost Effective ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Charge Property

The vehicles on road are increasing with rapid rate which is good by transportation perspective and hence the growing need of oil-based fuel making transportation costly as the price of oil based fuel rising too. The quantity of oil-based fuel remains unchecked and the exhaust from oil-based fuel brings environmental problems like ‘‘green house effect’’, health issues for the operating environment. The electric vehicles is a good option for moving away with problems related to the oil-based fuel lot of researches is going on in world and money is being spent on the development of the electric vehicles. The problem related with electric vehicles are electric vehicles have low speed, having low load carrying capacity, and batteries having short life. The main aim of this research paper is to give an idea about fabrication of simple, cost effective electric motorcycle which can be done by replacing internal combustion engine and other components with brush less direct current gear motor, controller and lithium-ion battery. This electric motorcycle uses 48V 750w brushless direct current gear motor to propel the vehicle, lithium-ion battery as power source the brushless direct current motor. The 48v 750w brushless direct current gear motor have high load carrying capacity with acceptable speed and lithium-ion battery have more life than other batteries available in market such as lead acid battery. The lithium-ion battery has less weight, quick charge property, required less storage space compare to other batteries available in market.

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