Double-Clamp ZVS converter interfaces high voltage traction batteries with 12V legacy system in hybrid and pure-electric vehicles

2012 ◽  
Author(s):  
Maurizio Salato ◽  
Patrick Kowalyk
Keyword(s):  
Electric Vehicles ◽  
High Voltage ◽  
Legacy System

scholarly journals A novel hybrid thermal management approach towards high-voltage battery pack for electric vehicles

2021 ◽  
Vol 247 ◽  
pp. 114676
Author(s):  
Lu Jin ◽  
Jun Tian ◽  
Shen Gao ◽  
Peng Xie ◽  
Mohsen Akbarzadeh ◽  
...  
Keyword(s):  
Thermal Management ◽  
Electric Vehicles ◽  
High Voltage ◽  
Battery Pack ◽  
Management Approach ◽  
High Voltage Battery

High Step-Up Boost Converter with Neural Network Based MPPT Controller for a PEMFC Power Source Used in Vehicular Applications

2018 ◽  
Vol 19 (5) ◽  
Author(s):  
K. Jyotheeswara Reddy ◽  
N. Sudhakar ◽  
S. Saravanan ◽  
B. Chitti Babu
Keyword(s):  
Neural Network ◽  
Fuel Cell ◽  
Electric Vehicles ◽  
High Voltage ◽  
Boost Converter ◽  
Maximum Power ◽  
Switching Frequency ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Mppt Controller

AbstractHigh switching frequency and high voltage gain DC-DC boost converters are required for electric vehicles. In this paper, a new high step-up boost converter (HSBC) is designed for fuel cell electric vehicles (FCEV) applications. The designed converter provides the better high voltage gain compared to conventional boost converter and also reduces the input current ripples and voltage stress on power semiconductor switches. In addition to this, a neural network based maximum power point tracking (MPPT) controller is designed for the 1.26 kW proton exchange membrane fuel cell (PEMFC). Radial basis function network (RBFN) algorithm is used in the neural network controller to extract the maximum power from PEMFC at different temperature conditions. The performance analysis of the designed MPPT controller is analyzed and compared with a fuzzy logic controller (FLC) in MATLAB/Simulink environment.

scholarly journals Design Method of Double-Boost DC/DC Converter with High Voltage Gain for Electric Vehicles

2020 ◽  
Vol 11 (4) ◽  
pp. 64 ◽  
Author(s):  
Zhengxin Liu ◽  
Jiuyu Du ◽  
Boyang Yu
Keyword(s):  
Electric Vehicles ◽  
High Voltage ◽  
Direct Current ◽  
Output Voltage ◽  
Input Voltage ◽  
Maximum Efficiency ◽  
Voltage Gain ◽  
Current Feedback ◽  
Voltage Ripple ◽  
High Voltage Gain

Direct current to direct current (DC/DC) converters are required to have higher voltage gains in some applications for electric vehicles, high-voltage level charging systems and fuel cell electric vehicles. Therefore, it is greatly important to carry out research on high voltage gain DC/DC converters. To improve the efficiency of high voltage gain DC/DC converters and solve the problems of output voltage ripple and robustness, this paper proposes a double-boost DC/DC converter. Based on the small-signal model of the proposed converter, a double closed-loop controller with voltage–current feedback and input voltage feedforward is designed. The experimental results show that the maximum efficiency of the proposed converter exceeds 95%, and the output voltage ripple factor is 0.01. Compared with the traditional boost converter and multi-phase interleaved DC/DC converter, the proposed topology has certain advantages in terms of voltage gain, device stress, number of devices, and application of control algorithms.

scholarly journals A Smart High-Voltage Cell Detecting and Equalizing Circuit for LiFePO4 Batteries in Electric Vehicles

2019 ◽  
Vol 9 (24) ◽  
pp. 5391 ◽  
Author(s):  
Ali Farzan Moghaddam ◽  
Alex Van den Bossche
Keyword(s):  
Monitoring System ◽  
Electric Vehicles ◽  
High Voltage ◽  
Intelligent Systems ◽  
Liquid Crystal Display ◽  
Cell Voltage ◽  
Mobile App ◽  
Battery Management System ◽  
Voltage Reference ◽  
Turn On

A battery management system (BMS) plays an important role in electric vehicles (EVs) in order to achieve a reasonable-lasting lifetime. An equalizing method is essential in order to obtain the best performance. A monitoring system is required to check if any cell voltage is high or low. In this paper, an equalizing and monitoring system for an ultra-light electric vehicle is proposed. The monitoring system detects if one cell is fully charged or all cells are fully charged and the equalizing system tops each cell at the desired voltage. To solve this issue, a light-emitting diode (LED) band gap is used as a voltage reference to inform the user if any cell is at its high voltage. A smart monitoring displays on the liquid crystal display (LCD), if one cell is high or all cells are high. This detection also provides a signal to the microcontroller to turn on/off the charger if all cells are high. Also, a Bluetooth module was designed to command the microcontroller the charger to turn on/off via voice/text message by using a smartphone. Additionally, a new smart monitoring system based on the Bluetooth model (HC05) and mobile app has been made in order to monitor individual cell voltage. A major feature of the system is to draw a very-low current, so that the system does not contribute significantly to the self-discharge of the battery and the circuit does not need sophisticated control. Manufacturers of large electric vehicles may have more intelligent systems that may require a permanent connection to the grid and allow high standby losses, where more state of charge (SOC) may be lost per day. The paper is rather focused on reducing the standby losses, and to activate the equalizer only when charging and/or driving. The experimental results are performed in order to verify the feasibility of the proposed circuit.

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