New energy vehicle charging detection method and system

Abstract

The present invention relates to the field of new energy vehicles, and discloses a new energy vehicle charging detection method and system, including a controller module, and a data acquisition module, a charging power module, a pulse current generating module, a communication module, an on-board self-diagnosis module, an electrochemical analysis module, a mode selection module, and a display module respectively connected to the controller module; the pulse current generating module can generate pulse current to realize transient current sampling, thereby providing data support for the electrochemical model algorithm, analyzing the health status of the power battery, and ensuring the safety of the user's vehicle use. The present invention has the beneficial effect of accurately evaluating the health status of the power battery and ensuring the safety of the operation of new energy vehicles.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicles, and in particular to a new energy vehicle charging detection method and system. Background Art

[0002] With the shortage of oil resources and the increasingly obvious greenhouse effect caused by exhaust emissions from traditional vehicles, new energy vehicles have become the best choice for the automotive industry to achieve green and environmentally friendly development with their advantages of no pollution, high energy utilization rate and low noise. In particular, in recent years, new energy vehicle technology has made major breakthroughs, and there are very mature and stable new energy vehicles on the market. As the new energy vehicle market continues to expand, the power supply technology for new energy vehicles has also become the focus of people's attention, especially the safety of power batteries, which has become an important indicator to ensure the driving safety of new energy vehicles.

[0003] In order to solve the safety problem of charging the power battery of new energy vehicles, there is a detection device and method for a charger for a car in the prior art, which belongs to the field of automobiles. The detection method includes: detecting the plugging state of the plug of the charging gun and generating a first detection signal and a second detection signal; judging whether the plug of the charging gun is fully plugged in according to the first detection signal; starting the processor when judging that the plug of the charging gun is fully plugged in; the processor controls the feedback unit to adjust the voltage at the output end of the charging gun; the processor detects whether there is a pulse width modulation PWM signal output at the output end of the charging gun; when no PWM signal is detected, the DC charging mode of the car is started; when a PWM signal is detected, the AC charging mode of the car is started: the processor judges the capacity of the cable of the charging gun according to the second detection signal; the processor judges the output power of the charging gun according to the duty cycle of the PWM signal; the processor adjusts the charging current of the charger of the car according to the capacity and output power of the cable.

[0004] Although this solution can monitor the charging piles of new energy vehicles through the monitoring circuit, thus effectively avoiding accidents such as electric shock, the charging piles used by the solution all use integrated power supply modules, which cannot achieve rapid changes in current. Generally, the time for the current to change from 90% to 10% of the maximum value is generally greater than 2 seconds. When performing electrochemical analysis on the battery, it is necessary to obtain the instantaneous differential value, so the steady-state current is meaningless for analysis. At the same time, the performance analysis of the battery requires the single cell voltage of the battery pack module, which is not included in the automotive battery management system (BMS) message. The existing charging pile hardware cannot provide good data support for the electrochemical model algorithm. Therefore, the demand for monitoring technology for the power battery itself during the charging process of the power battery of new energy vehicles is becoming increasingly obvious. Summary of the invention

[0005] The present invention aims to provide a new energy vehicle charging detection method and system to solve the technical problem of transient current sampling during the charging process of the power battery of the new energy vehicle and monitoring the health status of the power battery.

[0006] To achieve the above object, the present invention adopts the following technical solution: a new energy vehicle charging detection system, comprising a controller module, and a data acquisition module, a charging power module, a pulse current generation module, a communication module, an on-board self-diagnosis module, an electrochemical analysis module, a mode selection module and a display module respectively connected to the controller module;

[0007] A data collection module, used to collect power battery data of new energy vehicles within a collection time period to form a first data set, and send the first data set to the controller module;

[0008] Charging power module, used to dynamically adjust the output power of the charging pile according to the power request of the car;

[0009] The pulse current generation module is used to control the output current of the charging pile to change and form a transient current;

[0010] A communication module, used to provide a communication channel between the modules in the charging detection system;

[0011] The on-board self-diagnosis module is used to read the single cell voltage change value of the new energy vehicle power battery module within a specific time period to form a single cell voltage set, and send the single cell voltage set to the controller module;

[0012] The electrochemical analysis module is used to receive the total data set and obtain a first analysis result after analyzing and processing the total data set;

[0013] Mode selection module, used to select the working mode of the current charging pile;

[0014] A display module, comprising a touch screen, wherein the touch screen is used to display the first analysis result;

[0015] The controller module includes a data storage unit and a control unit. The data storage unit is used to store the first data set and the monomer voltage set to form a total data set, and send the total data set to the electrochemical analysis module; the control unit is used to control the charging power module and the pulse current generating module.

[0016] The principles and advantages of this solution are: in actual application, before charging the power battery of the new energy vehicle, the charging pile first enters the test mode, and the new energy vehicle sends a charging power request to the charging power module, and the power battery is charged from the output end of the charging pile. Then, the pulse current generating module sends a pulse current to the output end of the charging pile, and the output current of the charging pile is controlled to change at a preset speed within a preset time range to achieve transient current sampling. Then, the on-board self-diagnosis module reads the single cell voltage change value of the power battery module of the new energy vehicle within a specific time period, and obtains effective data for electrochemical model analysis, so as to accurately analyze and judge the health status of the power battery before charging, thereby ensuring the safety of new energy vehicles.

[0017] Preferably, as an improvement, the first data set includes the voltage and current on the DC side of the charging pile output end and the message data of the vehicle battery management system.

[0018] The voltage and current on the DC side of the charging pile output end are collected, and the operating data of the power battery is retrieved from the vehicle battery management system to provide data support for the electrochemical model algorithm, so as to achieve statistical analysis of the health status of the power battery and ensure the safety of new energy vehicles.

[0019] Preferably, as an improvement, the communication channel includes a mobile network channel and a wireless network channel.

[0020] The various modules in this system transmit information through 5G mobile networks and wireless networks, which not only ensures the timeliness and smoothness of information exchange, but also ensures the operational stability of the system.

[0021] Preferably, as an improvement, the output current of the charging pile is controlled to change rapidly by a pulse current generating module sending a pulse current to the output end of the charging pile to control the output current of the charging pile to change at a preset speed within a preset time range.

[0022] A pulse current is sent to the output end of the charging pile through the pulse current generating module, thereby realizing transient current sampling, so that the current change rate can meet the operating change requirements of the set charging current curve, so that the output current follows the charging current curve and provides reliable data for the detection of the power battery.

[0023] Preferably, as an improvement, the preset time range is 0-20 milliseconds.

[0024] The time range of the current change rate is set to 0-20 milliseconds to ensure that the current achieves the purpose of transient change, thereby meeting the requirements of data sampling.

[0025] Preferably, as an improvement, the output current of the charging pile changes from 10% of the maximum current to 90% of the maximum current within a preset time range according to the preset speed change.

[0026] Within the preset time range, the output current can change from 10% of the maximum current to 90% of the maximum current, realizing transient changes in current and ensuring that the rate of current change is fast enough so that the output current can follow the set charging current curve and realize transient current sampling, thereby providing reliable and effective data for power battery health status analysis.

[0027] Preferably, as an improvement, the working mode includes a test mode and a normal charging mode.

[0028] Setting the test mode and normal charging mode in the working mode can not only meet the daily charging needs of the power battery of new energy vehicles, but also detect the health status of the power battery through the test mode, thereby analyzing the current health status of the power battery, providing reliable analysis conclusions for the safe driving of new energy vehicles, and avoiding serious accidents caused by the power battery being in a dangerous state, threatening the personal safety of the driver.

[0029] The present invention also provides a new energy vehicle charging detection method, comprising the following steps:

[0030] Step S1, selecting a test mode in a mode selection unit and setting a charging current curve, and then the new energy vehicle sends a charging power request to a charging power module;

[0031] Step S2, the output end of the charging pile charges the power battery of the new energy vehicle according to a preset charging current curve, and the pulse current generating module sends a pulse current to the output end of the charging pile to control the output current of the charging pile to change at a preset speed within a preset time range;

[0032] Step S3, the data acquisition module collects the operating data of the new energy vehicle power battery within the acquisition time period and forms a first data set, and then sends the first data set to the controller module;

[0033] Step S4, the on-board self-diagnosis module reads the cell voltage change value of the new energy vehicle power battery module within a specific time period to form a cell voltage set, and sends the cell voltage set to the controller module;

[0034] Step S5, the controller module forms a total data set from the first data set and the monomer voltage set, and then sends the total data set to the electrochemical analysis module;

[0035] Step S6: the electrochemical analysis module performs statistical analysis on the total data set, obtains a first analysis result, and displays the first analysis result on the touch display screen.

[0036] The advantage of this method is that a pulse current is obtained by setting a pulse current generating module, so that transient current sampling can be performed on the output end of the charging pile, and then combined with the collected single cell voltage of the new energy vehicle power battery module and the operating data of the power battery in the vehicle battery management system, a statistical analysis is performed through the electrochemical analysis module, thereby obtaining a health status report of the current power battery to ensure the safe operation of the new energy vehicle.

[0037] Preferably, as an improvement, the touch display screen is also connected to the mode selection module for selecting the working mode and setting the charging current curve.

[0038] Completing mode selection and parameter setting through the touch screen can not only save operation time, but also make the system more intelligent and enhance the user experience of the system.

[0039] Preferably, as an improvement, the first analysis result includes power battery health, power battery sub-health and recommendation to replace the battery.

[0040] Through statistical analysis, it is found that there are three health statuses of the current power battery, including healthy power battery, sub-healthy power battery and battery replacement recommendation, so that users can clearly understand the current condition and performance of the power battery, so that users can use new energy vehicles reasonably in the future to slow down the rate of power battery performance degradation. It can also remind users to arrange for new energy vehicles to replace power batteries in a timely manner by clearly giving recommendations for battery replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a system schematic diagram of Embodiment 1 of the new energy vehicle charging detection method and system of the present invention.

[0042] Figure 2 It is a detection flow diagram of Embodiment 1 of the new energy vehicle charging detection method and system of the present invention. DETAILED DESCRIPTION

[0043] The following is further described in detail through specific implementation methods:

[0044] The marks in the drawings of the specification include: controller module 1, data acquisition module 2, charging power module 3, pulse current generating module 4, communication module 5, on-board self-diagnosis module 6, electrochemical analysis module 7, mode selection module 8, display module 9, data storage unit 10, and control unit 11.

[0045] Embodiment 1:

[0046] This embodiment is basically as shown in the attached Figure 1 As shown: a new energy vehicle charging detection system includes a controller module 1, and a data acquisition module 2, a charging power module 3, a pulse current generating module 4, a communication module 5, an on-board self-diagnosis module 6, an electrochemical analysis module 7, a mode selection module 8 and a display module 9 respectively connected to the controller module 1;

[0047] The data collection module 2 is used to collect the power battery data of the new energy vehicle within the collection time period to form a first data set, and send the first data set to the controller module 1;

[0048] Charging power module 3, used to dynamically adjust the output power of the charging pile according to the power request of the car;

[0049] The pulse current generating module 4 is used to control the output current of the charging pile to change and form a transient current;

[0050] Communication module 5, used to provide a communication channel between the modules in the charging detection system;

[0051] The on-board self-diagnosis module 6 is used to read the single cell voltage change value of the new energy vehicle power battery module within a specific time period to form a single cell voltage set, and send the single cell voltage set to the controller module 1;

[0052] The electrochemical analysis module 7 is used to receive the total data set and obtain a first analysis result after analyzing and processing the total data set;

[0053] Mode selection module 8, used to select the working mode of the current charging pile;

[0054] A display module 9, comprising a touch screen, wherein the touch screen is used to display the first analysis result;

[0055] The controller module 1 includes a data storage unit 10 and a control unit 11. The data storage unit 10 is used to store a first data set and a monomer voltage set to form a total data set, and send the total data set to the electrochemical analysis module 7; the control unit 11 is used to control the charging power module 3 and the pulse current generating module 4.

[0056] New energy vehicle charging detection method, as shown in the attached Figure 2 As shown, through the above system, when charging the power battery of a new energy vehicle, the following steps are included:

[0057] Step S1, selecting the test mode in the mode selection unit and setting the charging current curve, and then the new energy vehicle sends a charging power request to the charging power module 3;

[0058] Step S2, the output end of the charging pile charges the power battery of the new energy vehicle according to a preset charging current curve, and the pulse current generating module 4 sends a pulse current to the output end of the charging pile to control the output current of the charging pile to change at a preset speed within a preset time range;

[0059] Step S3, the data acquisition module 2 collects the operating data of the new energy vehicle power battery within the acquisition time period and forms a first data set, and then sends the first data set to the controller module 1;

[0060] Step S4, the on-board self-diagnosis module 6 reads the cell voltage change value of the new energy vehicle power battery module within a specific time period to form a cell voltage set, and sends the cell voltage set to the controller module 1;

[0061] Step S5, the controller module 1 forms a total data set from the first data set and the monomer voltage set, and then sends the total data set to the electrochemical analysis module 7;

[0062] Step S6, the electrochemical analysis module 7 performs statistical analysis on the total data set, and then obtains a first analysis result, and displays the first analysis result on the touch display screen.

[0063] The pulse current generating module 4 is used to send a pulse current to the output end of the charging pile, so as to control the output current of the charging pile to change rapidly in a very short time, thereby collecting the transient current at the output end of the charging pile, and then using the on-board self-diagnosis module 6 to read the single cell voltage change value of the new energy vehicle power battery module within a specific time period, combined with the operation data of the power battery retrieved from the vehicle battery management system, the electrochemical analysis model is used for statistical analysis to obtain the health status of the battery, thereby making an accurate assessment of the safety of the new energy vehicle and ensuring driving safety.

[0064] The specific implementation process of this embodiment is as follows:

[0065] The first step is to connect the output charging gun of the charging pile to the charging interface of the new energy vehicle, and operate on the touch screen to enter the mode selection module 8, set the current working mode of the charging pile to the test mode and the test mode duration is 5 minutes, and set the charging current curve.

[0066] In the second step, the new energy vehicle sends a charging power request to the charging power module 3. The charging power module 3 controls the output end of the charging pile to charge the power battery of the new energy vehicle according to the preset charging current curve and charges the power battery of the new energy vehicle with the current charging power request. The pulse current generating module 4 sends a pulse current to the output end of the charging pile to control the output current of the charging pile to change from 10% of the maximum current to 90% of the maximum current within 20 milliseconds, thereby realizing rapid changes in current.

[0067] In the third step, the data acquisition module 2 collects the voltage and current on the DC side of the charging pile output end at a frequency of 1000 Hz within a 20 millisecond period, and collects the operating data of the new energy vehicle power battery within one month to form a first data set, and then sends the first data set to the controller module 1.

[0068] In the fourth step, the on-board self-diagnosis module 6 reads the single cell voltage change value of the new energy vehicle power battery module within 5 minutes to form a single cell voltage set, and sends the single cell voltage set to the controller module 1. The controller module 1 aggregates the first data set and the single cell voltage set with the same timestamp to form a total data set, and then sends the total data set to the electrochemical analysis module 7.

[0069] In the fifth step, the electrochemical analysis module 7 performs statistical analysis on the total data set, and then obtains the conclusion of the current power battery health, and displays the power battery health as the analysis result through the touch screen, and then sets the working mode of the charging pile to normal on the touch screen, and the charging module starts charging the power battery.

[0070] At present, when new energy vehicles are charged at charging piles, the charging piles can only simply replenish the power battery, and cannot analyze the health status of the power battery. As the power supply source of the entire new energy vehicle, the safety of the power battery is a prerequisite for ensuring the safety of the entire new energy vehicle. Once a power battery fails, it is easy to cause its internal temperature to rise sharply, thereby causing spontaneous combustion, posing a great threat to the personal safety of drivers and passengers. At present, the charging piles on the market can only complete the function of replenishing power batteries. If the power battery is to be analyzed, special testing equipment is required. Therefore, it is very inconvenient to detect the health status of the power battery of new energy vehicles, and it is also very difficult to detect it on the basis of existing charging piles, because the charging piles all use integrated power supply modules, which cannot perform transient sampling of current. Generally, the time for the current to change from 90% to 10% of the maximum value is generally greater than 2 seconds. When performing electrochemical analysis on the battery, the instantaneous differential value of the current is required, so the steady-state current is meaningless for analyzing the health status of the power battery.

[0071] In this solution, by adding a pulse current module and an on-board self-diagnosis module to a conventional charging pile, the conventional charging pile is equipped with the function of detecting the health status of the power battery during the charging process. Specifically, the pulse current module is used to emit a pulse current to control the output current of the charging pile, so that the output current of the charging pile can complete a rapid change from 10% to 90% of the maximum current within 20 milliseconds, thereby obtaining a transient current, realizing transient current sampling, and providing reliable and effective data for subsequent power battery analysis. The on-board self-diagnosis module is then used to collect the single cell voltage data of the power battery module, and combined with the historical operation data of the power battery in the battery management system, the electrochemical model algorithm is used to perform statistical analysis on the above data, and a comprehensive and accurate analysis of the current health status of the power battery is performed. After obtaining accurate evaluation results, the user is informed in a timely manner, so that the user has a comprehensive understanding of the current health status of the power battery, and it is also convenient for the user to use new energy vehicles reasonably, ensuring the safety of new energy vehicles at a basic level.

[0072] Embodiment 2:

[0073] This embodiment is basically the same as the first embodiment, except that the working mode of the charging pile is set to automatic, that is, the charging pile enters the test mode first and then the charging mode.

[0074] The specific implementation process of this embodiment is the same as that of the first embodiment, except that:

[0075] The first step is to connect the output charging gun of the charging pile to the charging interface of the new energy vehicle, and operate on the touch screen to enter the mode selection module 8, set the current working mode of the charging pile to automatic and the test mode duration to 5 minutes, and set the charging current curve.

[0076] In the fifth step, the electrochemical analysis module 7 performs statistical analysis on the total data set, and then obtains the conclusion of the current power battery health, and displays the power battery health as the analysis result through the touch screen. At the same time, the charging pile enters the normal charging mode, and the new energy vehicle sends a maximum charging power request to the charging power module 3, and the output end of the charging pile outputs the maximum current to charge the new energy vehicle; when the power battery reaches 80% of the full charge, the current output by the output end of the charging pile is reduced to 60% of the maximum current until the charging is completed.

[0077] The working mode of the charging pile is set to automatic. The test mode can be charged before the charging pile starts the normal charging mode. The test time is 5 minutes. After the test is completed, the system automatically controls to enter the normal charging mode to charge the power battery. There is no need for manual conversion operation, and the effective charging rate of the test mode is 60% of the normal charging mode, which has little impact on the overall charging time. It can not only reduce the workload of manual operation of the charging pile to switch the charging mode, but also reduce the impact of the test mode on the normal charging time of the power battery by controlling the test time and the effective charging rate of the test mode, saving time for users, and achieving the purpose of ensuring both the safety of the power battery and the charging efficiency of the power battery.

[0078] Embodiment three:

[0079] This embodiment is basically the same as the second embodiment, except that: the electrochemical analysis module 7 analyzes that the performance of the current power battery has seriously deteriorated, and the system gives an analysis result of "recommended battery replacement". After the test is completed, the charging of the charging pile is immediately stopped, and a corresponding reminder is made on the touch screen.

[0080] The specific implementation process of this embodiment is basically the same as that of the second embodiment, except that:

[0081] In the fifth step, the electrochemical analysis module 7 performs statistical analysis on the total data set, and then reaches the conclusion that the current power battery performance has seriously degraded. The controller module 1 immediately controls the charging pile to stop charging, and at the same time displays a reminder message of "recommended battery replacement" on the touch screen to remind the user to replace the power battery of the new energy vehicle in time.

[0082] In conventional inspections, the specific contents of the inspection report are generally displayed directly. However, the inspection reports are often professional and difficult for general users to understand. Therefore, they are not very clear about the specific meaning of the report, which brings difficulties to users in understanding. Therefore, when the system detects that the health status of the power battery is not good, the system gives a simple and clear analysis result of "recommended battery replacement", indicating that the performance of the power battery has seriously deteriorated. If the power battery continues to be used, there is a great risk of safety failure. The system directly gives the most intuitive suggestions to avoid errors in the user's understanding of the test results; at the same time, charging is stopped immediately after the test is completed to avoid the power battery from generating a large amount of heat during the charging process, which may cause failures and pose a safety threat to the user. When feeding back the user the actual detection status of the power battery, the system also reminds the user to replace the power battery in time to minimize the safety threat of the power battery and ensure the user's driving safety and personal safety to the greatest extent.

[0083] Embodiment 4:

[0084] This embodiment is basically the same as the second embodiment, except that: the touch screen can display the current power level of the power battery and the estimated time to fully charge it while displaying the first analysis result.

[0085] The specific implementation process of this embodiment is basically the same as that of the second embodiment, except that:

[0086] In the fifth step, the electrochemical analysis module 7 performs statistical analysis on the total data set, and then obtains the conclusion of the current power battery health, and displays the power battery health as the analysis result through the touch screen. At the same time, the charging pile enters the normal charging mode, the new energy vehicle sends a maximum charging power request to the charging power module 3, and the output end of the charging pile outputs the maximum current to charge the new energy vehicle; when the power battery reaches 80% of the full power, the current output by the output end of the charging pile is reduced to 60% of the maximum current until the charging is completed; during the charging process, the current power of the power battery and the estimated time to be fully charged are displayed in real time on the touch screen.

[0087] By adding the function of displaying the current power level of the power battery and the estimated time to be fully charged on the touch display, users can intuitively view the current charging status and can reasonably arrange other matters based on the displayed estimated time, without having to wait aimlessly beside the charging pile. At the same time, this function is also beneficial for users in urgent situations. They can choose to manually stop charging when the power is sufficient for users to use. This provides users with personalized operations, gives users maximum charging freedom, and improves users' charging experience.

[0088] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. New energy vehicle charging detection system, Features: It includes a controller module, and a data acquisition module, a charging power module, a pulse current generation module, a communication module, an on-board self-diagnosis module, an electrochemical analysis module, a mode selection module and a display module respectively connected to the controller module; The data acquisition module is used to collect the power battery data of the new energy vehicle within the acquisition time period to form a first data set, and send the first data set to the controller module; The charging power module is used to dynamically adjust the output power of the charging pile according to the power request of the car; The pulse current generating module is used to control the output current of the charging pile to change and form a transient current; The communication module is used to provide a communication channel between the modules in the charging detection system; The on-board self-diagnosis module is used to read the single cell voltage change value of the new energy vehicle power battery module within a specific time period to form a single cell voltage set, and send the single cell voltage set to the controller module; The electrochemical analysis module is used to receive the total data set and obtain a first analysis result after analyzing and processing the total data set; The mode selection module is used to select the working mode of the current charging pile; The display module comprises a touch screen, and the touch screen is used to display the first analysis result; The controller module includes a data storage unit and a control unit, wherein the data storage unit is used to store the first data set and the monomer voltage set to form a total data set, and send the total data set to the electrochemical analysis module; the control unit is used to control the charging power module and the pulse current generation module; The output current of the charging pile is controlled to change to form a transient current, wherein the pulse current generating module sends a pulse current to the output end of the charging pile, and controls the output current of the charging pile to change at a preset speed within a preset time range; The preset time range is 0-20 milliseconds; the change at the preset speed is that the output current of the charging pile changes from 10% of the maximum current to 90% of the maximum current within the preset time range; The first data set includes the data acquisition module collecting the voltage and current of the DC side of the charging pile output end at a frequency of 1000 Hz within a 20 millisecond period, and collecting the operating data of the power battery of the new energy vehicle within one month; The charging pile first enters the test mode. According to the charging power request sent by the new energy vehicle to the charging power module, the output end of the charging pile charges the power battery. Then the pulse current generating module sends a pulse current to the output end of the charging pile, and controls the output current of the charging pile to change at a preset speed within a preset time range to achieve transient current sampling. Then, the on-board self-diagnosis module reads the single cell voltage change value of the new energy vehicle power battery module within a specific time period, obtains effective data for electrochemical model analysis, and realizes analysis and judgment of the health status of the power battery before charging.

2. The new energy vehicle charging detection system according to claim 1, Features: The first data set includes the voltage and current on the DC side of the charging pile output end and the message data of the vehicle battery management system.

3. The new energy vehicle charging detection system according to claim 1, Features: The communication channels include mobile network channels and wireless network channels.

4. The new energy vehicle charging detection system according to claim 1, Features: The working mode includes a test mode and a normal charging mode.

5. New energy vehicle charging detection method, It is characterized in that The new energy vehicle charging detection system as claimed in claim 1 comprises the following steps: Step S1, selecting a test mode in a mode selection unit and setting a charging current curve, and then the new energy vehicle sends a charging power request to a charging power module; Step S2, the output end of the charging pile charges the power battery of the new energy vehicle according to a preset charging current curve, and the pulse current generating module sends a pulse current to the output end of the charging pile to control the output current of the charging pile to change at a preset speed within a preset time range; Step S3, the data acquisition module collects the operating data of the new energy vehicle power battery within the acquisition time period and forms a first data set, and then sends the first data set to the controller module; Step S4, the on-board self-diagnosis module reads the cell voltage change value of the new energy vehicle power battery module within a specific time period to form a cell voltage set, and sends the cell voltage set to the controller module; Step S5, the controller module forms a total data set from the first data set and the monomer voltage set, and then sends the total data set to the electrochemical analysis module; Step S6: the electrochemical analysis module performs statistical analysis on the total data set, obtains a first analysis result, and displays the first analysis result on the touch display screen.

6. The new energy vehicle charging detection method according to claim 5, Features: The touch display screen is also connected to the mode selection module for selecting a working mode and setting a charging current curve.

7. The new energy vehicle charging detection method according to claim 5, Features: The first analysis result includes power battery health, power battery sub-health and recommendation to replace the battery.

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