Development and Simulation of Real-Time Early Warning Protection System for Electric Vehicle Charging Based on a Two-Layer Protection Model
Round 1
Reviewer 1 Report
General comments:
Page 1, Line 40, Consider changing the term "The battery is on fire". Instead, consider "Battery on fire" or "Battery catch fire."
The novelty of the work is unclear.
Fig.1 shows a comparison of EV accidents that probably does not represent normal accident rates. The COVID-19 confinement probably explains the decline in accident rates in the first quarter of 2020 and the abnormal increase in the later part of the year. Please consider the impact of the confinements in the rate of accidents and include the number of accidents in 2021 in the chart.
Specific remarks:
Page 12, Line 411-413, please consider changing the letter that represents the voltage rising rate from Tn to Vn and Tn-1 to Vn-1.
Page 12, Line 415-418, please consider changing the letter that represents the temperature rising rate from VT to TT.
Page 12, Line 427-429, please consider changing the letter that represents the current ramp rate from VA to IA.
Page 12, the units of eq (1), (2), and (4) have inconsistent units!
Page 14, Fig. 12, please consider improving the quality of the image
Page 15, line 500, eq(5), why is it considered the modulus of the difference? A higher voltage on the BMS in comparison with the charger V1>V2 is equivalent to a higher voltage on the charger in comparison with the BMS V2>V1?
Pag 15, Fig 13, increase chart legend size.
Pag 16, line 527-529, please consider changing the letter that represents the current from A to I, i.e. I1 and I2 instead of A1 and A2.
Pag 16, Fig 14 and Fig 15, increase chart legend size. Pag 17, Fig 16, increase chart legend size.Author Response
See word attachment below.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
This paper proposes "Research on New Energy Vehicle Charging Early Warning System and Protection Technology" Please consider the following comments.
- "Research on" does not fit well with the title of the manuscript. The title should focus on the specific name of the research.
- The abstract section is not focused. Background and main research output have not been properly discussed.
- "The real-time monitoring of 27 parameters such as the maximum/ minimum cell temperature." does not give a good meaning in the abstract section.
- Several paragraphs of the introduction section should be logically connected to provide a proper flow of information. For example, paragraph 6 suddenly discusses "insulation, environment and communication protocol". These issues are not properly related to the issues discussed in paragraph 5.
- The research questions have not been identified. Thus, the last paragraph of the introduction section is unable to state the main contributions to answer the research questions.
- Section 2 should be deleted or shorted as it mainly documents the existing approaches. It will help the authors focus on their proposed approach.
- What is the difference between simulation and physical simulation?
- Why the voltage pressure fluctuates in fig. 12?
- The quality of Fig. 13, 14, 15, 16 should be improved.
- How the proposed approach provides early warning is not justified.
This work is not focused. The main contributions have not been properly highlighted.
Author Response
See word attachment below.
Author Response File: Author Response.pdf
Reviewer 3 Report
It is a novel topic and could be of interest for the readers.
The main question addressed in this research is Energy Vehicle Charging Early Warning System and Protection Technology. This is and verified by the output voltage and output current of the charger of the China BYD Auto Han EV.
The charging safety problems and protection strategies in the charging network are summarized from the grid side, the charging equipment side, the vehicle side and the operation platform side. The architecture of the charging early warning system was constructed, the data transmission mechanism was revealed, the real-time protection of EV charging data was proposed, the early warning device was developed and the Lora networking scheme was used to realize the measurement of voltage, current and output current of lithium iron phosphate batteries and lithium batteries.
This paper is good at the first point for this research. In future, with more research in this area only further improvements can be considered.
The conclusions are consistent with the evidence and arguments and the references are appropriate.
Tables and figures are very informative. Some figures need to be improved in quality which has been mentioned in the comments to the authors.
Author Response
See word attachment below.
Author Response File: 
Author Response.docx
Round 2
Reviewer 1 Report
All of my comments and suggestions were considered by the authors. I have no further comments to add.
Reviewer 2 Report
The authors have improved the quality and readability of the paper by addressing all comments.
