Investigation on the method of battery self-heating using motor pulse current

2021 ◽  
pp. 095440702110550
Author(s):  
Changhong Du ◽  
Qianlei Peng ◽  
Fu Chen ◽  
Kejun Deng ◽  
Jian Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Pulse Current ◽  
Lithium Ion ◽  
Internal Resistance ◽  
Experimental Result ◽  
Switching Frequency ◽  
Average Temperature ◽  
Self Heating ◽  
Power Battery ◽  
Rise Rate

The charging and discharging performance of lithium-ion battery at low temperature will decline greatly, which seriously affects the adaptability of electric vehicles at low temperature. This paper proposes to use the inductance characteristic of the motor stator and the switching control characteristic of the motor controller to form pulse current in the battery, and realize the self-heating of the power battery at low temperature. Using this method the heating of the battery can be achieved without any additional hardware or cost. The experimental result shows the average temperature rise rate of the power battery reaches 2.88°C/min. And the influence of different parameters on the heating effect is analyzed through the experiments, including IGBT switching frequency, d-axis voltage, motor-rotor position, and battery internal resistance.

scholarly journals Research on thermal equilibrium performance of liquid-cooled lithium-ion power battery system at low temperature

2020 ◽  
Vol 24 (6 Part B) ◽  
pp. 4147-4158
Author(s):  
Xudong Sun ◽  
Xiaoming Xu ◽  
Jiaqi Fu ◽  
Wei Tang ◽  
Qiuqi Yuan
Keyword(s):  
Low Temperature ◽  
Thermal Equilibrium ◽  
Design Method ◽  
Lithium Ion ◽  
Heating System ◽  
Heating Time ◽  
Orthogonal Experimental Design ◽  
Inlet Temperature ◽  
Power Battery ◽  
Important Trend

The development of electric vehicles is an important trend in the automotive industry, in which the performance of power batteries is greatly affected by temperature. In recent years, it has been widely concerned that the performance of power batteries at low temperature will lead to the vehicle failure to start because of the bad thermal equilibrium of power battery heating system. This paper studies the thermal equilibrium performance of battery liquid heating system at low temperature. Inlet temperature, heating time, ambient temperature, and their coupling relationship to battery thermal equilibrium performance are studied by orthogonal experimental design method. It is expected that this study can provide reference for the parameter selection of battery heating system.

scholarly journals Effect of Conductive Material Morphology on Spherical Lithium Iron Phosphate

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 904 ◽  
Author(s):  
Lizhi Wen ◽  
Jiachen Sun ◽  
Liwei An ◽  
Xiaoyan Wang ◽  
Xin Ren ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Low Temperature ◽  
Electrochemical Performance ◽  
Lithium Iron Phosphate ◽  
Carbon Sources ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Internal Resistance ◽  
Conductive Agent ◽  
The Stability

As an integral part of a lithium-ion battery, carbonaceous conductive agents have an important impact on the performance of the battery. Carbon sources (e.g., granular Super-P and KS-15, linear carbon nanotube, layered graphene) with different morphologies were added into the battery as conductive agents, and the effects of their morphologies on the electrochemical performance and processability of spherical lithium iron phosphate were investigated. The results show that the linear carbon nanotube and layered graphene enable conductive agents to efficiently connect to the cathode materials, which contribute to improving the stability of the electrode-slurry and reducing the internal resistance of cells. The batteries using nanotubes and graphene as conductive agents showed weaker battery internal resistance, excellent electrochemical performance and low-temperature dischargeability. The battery using carbon nanotube as the conductive agent had the best overall performance with an internal resistance of 30 mΩ. The battery using a carbon nanotube as the conductive agent exhibited better low-temperature performance, whose discharge capacity at −20 °C can reach 343 mAh, corresponding to 65.0% of that at 25 °C.

scholarly journals Study on the Capacity Fading Effect of Low-Rate Charging on Lithium-Ion Batteries in Low-Temperature Environment

2020 ◽  
Vol 11 (3) ◽  
pp. 55
Author(s):  
Xiaogang Wu ◽  
Wenbo Wang ◽  
Yizhao Sun ◽  
Tao Wen ◽  
Jizhong Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Lithium Ion Batteries ◽  
Performance Test ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Side Reaction ◽  
Cycle Performance ◽  
Power Battery ◽  
Temperature Environment ◽  
Low Rate

By taking a cylindrical LiFePO4 power battery as the research object, the cycle performance test was conducted under different charging current aging paths in a preset low-temperature environment and combined with EIS results to analyze the dynamic characteristics of the battery during the aging process, using the PDF (Probability Density Function) curve to analyze the change of battery energy storage characteristics, and analyze the aging mechanism of the power battery by analyzing the change in the lithium precipitation energy difference. The experimental results showed that under a low-temperature environment, the effect of increasing the charge rate is mainly reflected in slowing down the phase transformation reaction. From the analysis of lithium precipitation of the battery, it can be seen that the main mechanism of the aging of the battery is the loss of active lithium under the conditions of low-rate cycling at sub-zero temperature. The products from the side reaction between the lithium plating and the electrolyte build up on the SEI (Solid Electrolyte Interphase) film, which significantly increases the battery impedance late in the cycle. The work in this paper complements the mechanistic studies of lithium-ion batteries under different aging paths and is also useful for capacity estimation models and research on battery health.

CAM-7/LTO Cells for Lithium-Ion Batteries with Rapid Charging Capability at Low Temperature

2012 ◽  
Author(s):  
David Ofer ◽  
Leah Nation ◽  
Sharon Dalton-Castor ◽  
Brian Barnett ◽  
Suresh Sriramulu
Keyword(s):  
Low Temperature ◽  
Lithium Ion Batteries ◽  
Lithium Ion
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