Battery car charging state real-time monitoring and health state evaluation system

Abstract

The invention relates to the technical field of battery car charging, and discloses a battery car charging state real-time monitoring and health state evaluation system, comprising a battery monitoring circuit comprising a battery pack, a first temperature detection module and a first switch for controlling the charging on-off of the battery pack; the charger monitoring circuit comprises a charging circuit for charging the battery pack, a second temperature detection module, a first current detection module and a second switch for controlling the charging on / off of the charging circuit; the judgment control module is used for judging health states of the battery and the charger and then controlling charging switches of the battery pack and the charger; and the cloud platform is used for detecting the charging state of the battery pack, cutting off the charging of the battery pack after the battery pack is fully charged, setting a timed task, and stopping the charging of the battery pack after the time point of the timed task is reached. Effective support is provided for safe use of the battery car and promotion of construction of a smart city.

Description

Technical Field

[0001] The present invention relates to the technical field of battery vehicle charging, and in particular to a system for real-time monitoring of charging status and health status evaluation of a battery vehicle. Background Art

[0002] At present, electric vehicles mainly use lead-acid batteries and lithium batteries as rechargeable batteries. Lead-acid batteries have the advantages of low cost, high cost performance, and mature technology; while lithium batteries are lighter and dominate in high-end models, but both types of batteries have safety issues. According to statistics, battery failure and electric circuit failure of electric vehicles account for the highest proportion of fires, that is, batteries and chargers are the number one culprits of fires. Therefore, accurately locating the fault location and accurately monitoring the temperature changes of electric vehicles, and then being able to warn in advance and curb the occurrence of disasters, are of great significance to protecting the property safety of electric vehicle owners and the life safety of surrounding personnel.

[0003] In this regard, some scholars have proposed a battery vehicle safe charging monitoring system to provide timely feedback on electrical and temperature signals; some have started from the perspective of smart sockets, which can remotely time switches, automatically cut off power when fully charged, and provide overload protection; and some have remotely centralized monitoring of charging stations and charging piles, and exchange information with battery vehicle charging piles connected to the platform through the Internet of Things technology. However, these methods still have some urgent problems to be solved in actual monitoring, and there is still a lack of effective means to accurately monitor temperature, and its detection method is not involved. Summary of the invention

[0004] The present invention provides a system for real-time monitoring of charging status and health status evaluation of a battery vehicle to solve the above problems.

[0005] The present invention is achieved through the following technical solutions:

[0006] A battery vehicle charging status real-time monitoring and health status evaluation system, comprising:

[0007] A battery monitoring circuit, comprising a battery pack, a first temperature detection module for monitoring the real-time temperature of each battery in the battery pack, and a first switch for controlling the charging and disconnection of the battery pack;

[0008] A charger monitoring circuit, comprising a charging circuit for charging the battery pack, a second temperature detection module and a first current detection module for monitoring the real-time temperature and real-time current of the charging circuit, and a second switch for controlling the charging on and off of the charging circuit;

[0009] A judgment control module, which is respectively arranged in the battery monitoring circuit and the charger monitoring circuit, and is used to judge the health status of the battery and the charger respectively according to the real-time temperature of each battery and the real-time temperature and real-time current of the charger based on a preset judgment standard, and then control the charging switch of the battery pack and the charger respectively according to the health status of the battery and the charger;

[0010] The cloud platform is used to detect the charging status of the battery pack and disconnect the charging of the battery pack after the battery pack is fully charged. At the same time, a timed task is set and the charging of the battery pack is stopped after the time point of the timed task is reached.

[0011] As an optimization, the first temperature detection module is a thermometer, the input end of the thermometer is respectively connected to each of the batteries and is located M cm away from the positive and negative electrodes of the batteries; the output end of the thermometer is connected to the control end of the first switch, one end of the first switch is connected to one end of the charging port, the other end of the first switch is connected to the positive electrode of the battery pack, the negative electrode of the battery pack is connected to the other end of the charging port, and the control end of the first switch is connected to the cloud platform.

[0012] As an optimization, the judgment control module located in the battery monitoring circuit is arranged in the thermometer.

[0013] As an optimization, the second temperature detection module and the first current detection module are respectively a temperature sensor and a current sensor. The charger monitoring circuit is arranged on a circuit board in the packaging shell, including a charging circuit, a second switch, a charging controller, a temperature sensor and a current sensor. One end of the charging circuit is connected to the mains by connecting the second switch in series, and the other end of the charging circuit is connected to the charging port, and a current sensor is provided at one end of the charging circuit connected to the charging port. The temperature sensor is arranged in the packaging shell and the distance between the temperature sensor and the charging circuit is less than n cm. The output ends of the temperature sensor and the current sensor are respectively connected to the input end of the charging controller, the output end of the charging controller is connected to the control end of the second switch, and the control end of the second switch is connected to the cloud platform.

[0014] As an optimization, the judgment control module located in the charger monitoring circuit is arranged in the charging controller.

[0015] As an optimization, the first switch is a controllable IGBT or a controllable MOSFET.

[0016] As an optimization, the second switch is a controllable IGBT or a controllable MOSFET.

[0017] As an optimization, the preset judgment criteria include a judgment standard for the health status of a lead-acid battery, a judgment standard for the health status of a lithium battery charge, and a judgment standard for the health status of a charger charge.

[0018] As an optimization, the criteria for determining the health status of lead-acid batteries are as follows:

[0019] Healthy: 0-35 degrees, Good: 35-50 degrees, Warning: 50-65, Fault: above 65 degrees;

[0020] The specific criteria for determining the healthy charging status of lithium batteries are:

[0021] Healthy: 0-45 degrees, Good: 45-55 degrees, Warning: 55-65, Fault: above 65 degrees.

[0022] As an optimization, the judgment criteria of the charger charging health status include temperature judgment criteria and current judgment criteria, wherein the temperature judgment criteria are specifically:

[0023] Healthy: 0-45 degrees, Good: 45-55 degrees, Warning: 55-65, Fault: above 65 degrees;

[0024] The current determination criteria are specifically:

[0025] When the charger current sensor detects that the current is higher than 1.5 times the maximum steady current and lasts for 10s, it directly switches to fault mode.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] The present invention builds a temperature monitoring platform for battery modules and chargers, thereby more accurately monitoring the temperature of the battery vehicle when it is charging, and can exchange data with the charging system or cloud platform to issue early warnings and proactive prevention instructions in a timely manner. This solves the problem that there is currently a lack of effective means for accurately monitoring the temperature of battery vehicles when they are charging, and can control the charging status through information interconnection. At the same time, the present invention also establishes a criterion for judging the healthy status of battery vehicle charging. By demodulating and judging the collected information, the health status is divided into four categories: healthy, good, warning, and fault, which can timely and accurately reflect the current charging status of the battery vehicle. The present invention provides a more reliable means for accurate temperature monitoring and status control when the battery vehicle is charging, thereby providing effective support for the safe use of battery vehicles and the promotion of the construction of smart cities. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0029] Figure 1 This is a module connection diagram of a battery vehicle charging status real-time monitoring and health status evaluation system according to the present invention;

[0030] Figure 2 A specific circuit diagram of the battery monitoring circuit of the present invention;

[0031] Figure 3 A specific circuit diagram of the charger monitoring circuit of the present invention;

[0032] Figure 4 This is a schematic diagram of the real-time detection process of battery vehicle charging according to the present invention;

[0033] Figure 5 This is a flow chart of the battery vehicle cloud-based timing switch according to the present invention. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0035] This embodiment 1 provides a system for real-time monitoring of battery vehicle charging status and health status evaluation, such as Figure 1-5 As shown, including:

[0036] A battery monitoring circuit, comprising a battery pack, a first temperature detection module for monitoring the real-time temperature of each battery in the battery pack, and a first switch for controlling the charging and disconnection of the battery pack;

[0037] A charger monitoring circuit, comprising a charging circuit for charging the battery pack, a second temperature detection module and a first current detection module for monitoring the real-time temperature and real-time current of the charging circuit, and a second switch for controlling the charging on and off of the charging circuit;

[0038] A judgment control module, which is respectively arranged in the battery monitoring circuit and the charger monitoring circuit, and is used to judge the health status of the battery and the charger respectively according to the real-time temperature of each battery and the real-time temperature and real-time current of the charger based on a preset judgment standard, and then control the charging switch of the battery pack and the charger respectively according to the health status of the battery and the charger;

[0039] The cloud platform is used to detect the charging status of the battery pack and disconnect the charging of the battery pack after the battery pack is fully charged. At the same time, a timed task is set and the charging of the battery pack is stopped after the time point of the timed task is reached.

[0040] like Figure 2As shown, the first temperature detection module is a thermometer, the input end of the thermometer is respectively connected to each of the batteries and is located at a distance of M cm from the positive and negative electrodes of the batteries; the output end of the thermometer is connected to the control end of the first switch, one end of the first switch is connected to one end of the charging port, the other end of the first switch is connected to the positive electrode of the battery pack, the negative electrode of the battery pack is connected to the other end of the charging port, and the control end of the first switch is connected to the cloud platform. M is a positive number, which can be an integer or a positive number with a decimal.

[0041] like Figure 3 As shown, the second temperature detection module and the first current detection module are respectively a temperature sensor and a current sensor, the charger monitoring circuit is arranged in a packaging shell, and includes a charging circuit, a second switch, a charging controller, a temperature sensor and a current sensor, one end of the charging circuit is connected to the mains by connecting the second switch in series, the other end of the charging circuit is connected to the charging port, and a current sensor is arranged at one end of the charging circuit connected to the charging port, the temperature sensor is arranged in the packaging shell and the distance between the temperature sensor and the charging circuit is less than ncm, n is a positive number, the output ends of the temperature sensor and the current sensor are respectively connected to the input end of the charging controller, the output end of the charging controller is connected to the control end of the second switch, and the control end of the second switch is connected to the cloud platform.

[0042] Specifically, the judgment control module located in the battery monitoring circuit is arranged in the thermometer, and the judgment control module located in the charger monitoring circuit is arranged in the charging controller.

[0043] The installation positions of the temperature sensor and the current sensor in the charger monitoring circuit can be found by genetic algorithm.

[0044] The specific process is:

[0045] A1. Set the number of iterations of the genetic algorithm and the number of individuals to be solved in each generation of the population, wherein each individual to be solved includes an influencing factor, and the influencing factor includes the coordinates of the temperature sensor in the packaging shell and the coordinates of the current sensor in the packaging shell, wherein the top view of the packaging shell is a rectangle, and the charging circuit is fixed in the rectangle and its relative position relative to the rectangle remains unchanged. For example, the four points of the rectangle are ABCD (A is the lower left point, B is the lower right point, C is the upper right point, and D is the upper left point), then the distance of the charging circuit relative to the four points ABCD remains unchanged, and a coordinate system is established with point A as the origin.

[0046] A2. Establish a matching model, wherein the matching model includes an objective function, wherein the objective function is:

[0047] minΔI=|I′-I|;

[0048] maxT;

[0049] Where I is the current at one end of the charging circuit connected to the charging port detected by the current sensor at room temperature, I ′ is the current at one end of the charging circuit connected to the charging port detected by the current sensor in the charger monitoring circuit arranged in the package shell of the present invention, and T is the temperature detected by the temperature sensor in the charger monitoring circuit arranged in the package shell of the present invention;

[0050] A3. Encode the coordinates of the temperature sensor in the packaging shell and the coordinates of the current sensor in the packaging shell to obtain the encoding values ​​of the individuals to be solved, and randomly generate an initial population consisting of several individuals to be solved based on the constraint conditions, let the initial population be the parent population, let the individuals to be solved in the parent population be the parent individuals, and the encoding values ​​of each parent individual include the coordinates of the temperature sensor in the packaging shell and the coordinates of the current sensor in the packaging shell; wherein the constraint conditions are: the coordinates are located in the packaging shell, and the current sensor for charger temperature monitoring needs to be connected in series with the charging circuit and does not cover the original charging circuit.

[0051] A4. Perform temperature detection and current detection according to the coding values ​​of each parent individual of the parent population, so as to obtain a detection result, wherein the detection result includes a current value of a charging circuit and a temperature value inside a packaging shell;

[0052] A5. Calculate a fitness function according to the detection result, and calculate the fitness value of each parent individual in the parent population according to the fitness function and sort them;

[0053] A6, save the first N parent individuals with the largest fitness values ​​in the parent population, select parent individuals from all parent individuals except the first N parent individuals with the largest fitness values ​​through roulette wheel to perform crossover mutation operations to obtain offspring individuals, calculate the fitness values ​​of the offspring individuals after crossover mutation and sort them, reinsert the offspring individuals into the parent population according to the fitness values, select a set number of individuals to be solved to form a new parent population, and then return to A4;

[0054] A7. Repeat A4-A6 until the number of iterations is reached or the objective function value is within a specified threshold range, and the parent population finally obtained, wherein the parent individuals in the parent population are feasible individuals.

[0055] The fitness function is: F(x)=T.

[0056] Here, first, the current of the charging circuit detected by the current sensor under room temperature conditions is set as the reference current, and then the current of the charging circuit is detected by the current sensor in the packaged charger (package shell + charger monitoring circuit). Since the temperature has an impact on the detection of the current sensor, find a current that is closest to the reference current when the charging circuit is running. At the same time, the current sensor and the temperature sensor are installed at the two installation positions with the highest temperature in the charger, respectively. In this way, the accuracy of the current detection can be guaranteed as much as possible. At the same time, the temperature of the charger detected by the temperature sensor is the highest, which can also protect the charger as much as possible. When the charger is determined to be in a fault state, charging is stopped immediately.

[0057] Specifically, the specific structure of information interaction on the cloud platform is as follows:

[0058] A microprocessor, used to process the instructions from the thermometer and the charging controller, so as to identify the temperature of the battery and the charging circuit, and the current of the charging circuit;

[0059] WIFI, for communication between the microprocessor and the router;

[0060] The mobile terminal can set up scheduled tasks and automatic power-off tasks when fully charged in advance. For example, the charger switch can be turned off at a certain time, and the scheduled tasks can be uploaded and saved in the server. The server sends the scheduled tasks to the charger control terminal through the router and then turns off the switch. At the same time, the charging status of the battery vehicle and the collected information can be fed back to the cloud terminal in real time, such as Figure 5 shown.

[0061] More specifically, the temperature monitoring solution (battery module):

[0062] The battery pack includes four 12 V 14 Ah batteries, forming a 48 V battery module for powering the electric vehicle;

[0063] Thermometer, including temperature signal demodulation circuit, single chip control circuit, signal feedback circuit, used for conversion between temperature signal and electrical signal, switch control, and health status feedback;

[0064] The temperature sensor, in this embodiment, is placed 1 cm away from the positive and negative electrodes of the battery, and a thermocouple may be used;

[0065] The first switch is connected in series to the charging main circuit and can adopt a controllable IGBT or a controllable MOSFET to control the charging switch state of the battery vehicle;

[0066] Charging port, connected to the charger, used to access the mains power.

[0067] Temperature monitoring solution (charger):

[0068] The charger includes a charging circuit, a connecting line, a packaging shell, etc., one end of which is connected to the charging module and the other end is connected to the mains, and is used for charging the battery vehicle;

[0069] The current sensor is connected in series to the charger circuit to collect the circuit current and transmit the signal to the controller;

[0070] The temperature sensor is placed next to the charging circuit. It can be a thermistor or a thermocouple. It is used to collect the internal temperature of the charger and transmit the signal to the controller.

[0071] A controller, including a temperature signal demodulation circuit, a current signal demodulation circuit, a single-chip control circuit, and a signal feedback circuit, for conversion between temperature signals and electrical signals, switch control, and health status feedback;

[0072] The second switch is connected in series to the charging main circuit and may adopt a controllable IGBT or a controllable MOSFET to control the switch state of the charger.

[0073] In some embodiments, the preset determination criteria include a determination criteria for the health status of a lead-acid battery, a determination criteria for the charging health status of a lithium battery, and a determination criteria for the charging health status of a charger.

[0074] The specific criteria for determining the health status of lead-acid batteries are:

[0075] Healthy: 0-35 degrees, Good: 35-50 degrees, Warning: 50-65, Fault: above 65 degrees;

[0076] The specific criteria for determining the healthy charging status of lithium batteries are:

[0077] Healthy: 0-45 degrees, Good: 45-55 degrees, Warning: 55-65, Fault: above 65 degrees.

[0078] The judgment criteria of the charger charging health status include temperature judgment criteria and current judgment criteria, wherein the temperature judgment criteria are specifically:

[0079] Healthy: 0-45 degrees, Good: 45-55 degrees, Warning: 55-65, Fault: above 65 degrees;

[0080] The temperature monitoring layout is carried out according to different battery and charger types. Due to differences in judgment standards, when the indicator light changes are controlled by the single-chip microcomputer, the temperature signal and the electrical signal are converted into each other, and different health states are fed back with different electrical signal gradients. The power supply is cut off when a fault occurs.

[0081] The current determination criteria are specifically:

[0082] When the charger current sensor detects that the current is higher than 1.5 times the maximum steady current and lasts for 10s, it directly switches to fault mode.

[0083] Health status judgment:

[0084] (1) By simulating the charging status of different types of batteries and chargers, a "battery vehicle charging health status judgment strategy" is proposed. The charging health status of lead-acid batteries is mainly divided into four categories: healthy, good, warning, and fault. Healthy: 0-35 degrees, good: 35-50 degrees, warning: 50-65, and fault: above 65 degrees. The charging health status of lithium batteries is mainly divided into four categories: healthy, good, warning, and fault. Healthy: 0-45 degrees, good: 45-55 degrees, warning: 55-65, and fault: above 65 degrees. The charging health status of chargers is mainly divided into four categories: healthy, good, warning, and fault. Healthy: 0-45 degrees, good: 45-55 degrees, warning: 55-65, and fault: above 65 degrees. Indicator lights are provided for display, namely: green, yellow, orange, and red. When the health status changes to fault, the line switch is cut off and the alarm is turned on.

[0085] (2) When the charging switch is turned on and off, the current will overshoot. If the charger current sensor detects that the current is higher than 1.5 times the maximum steady current and lasts for 10 seconds, it will directly switch to fault mode. The specific detection is as follows: Figure 4 shown.

[0086] Figure 1 This is a schematic diagram of the battery vehicle charging temperature monitoring hardware platform described in the present invention. The temperature and current monitoring signals arranged in the battery pack and charger of the battery vehicle are transmitted to the controller, which performs signal demodulation, switch control, and health status feedback. All processes are placed in a WIFI environment, and the information is transmitted to the terminal through the gateway and server for information interaction.

[0087] Figure 2 It is a schematic diagram of the battery charging temperature monitoring method of the electric vehicle described in the present invention. Taking the series battery pack of 48V battery modules (4 12V, 14 Ah batteries as a group) as an example, the positive and negative poles of the single battery are cross-connected in sequence with the power connection line, and the positive and negative poles at both ends of the battery pack are respectively connected in series with the electric vehicle charger and the control switch. The temperature test point is arranged 1 cm away from the positive and negative poles of each battery in the battery pack, and the signal is demodulated by the thermometer and transmitted to the cloud. The temperature sensor can be a thermocouple, and attention should be paid to the insulation protection between the thermocouple and the battery.

[0088] Figure 3The figure is a schematic diagram of the battery vehicle charger charging temperature monitoring method of the present invention. Conventional chargers are composed of charging circuits and packaging shells. The present invention adds current sensors, temperature sensors, conditioning and control circuits, switch elements, etc. to the internal charging circuit, and the real-time detection signal is demodulated by the charging controller and transmitted to the cloud. The temperature sensor can be a thermistor or a thermocouple.

[0089] In summary, (1) the present invention places the temperature sensor at the place where the battery of the electric vehicle heats up the most, that is, at the positive and negative ends of each battery in the battery module. The temperature sensor is placed in an external contact manner and the insulation treatment is perfect. Taking a battery module with four batteries as an example, each battery will be equipped with two temperature sensors, and a module will have a total of 8 temperature measurement points. These signals will all be converted into voltage signals through the conditioning circuit and transmitted to the temperature controller, and the signal will be processed and judged by the single-chip microcomputer. When the set threshold is exceeded, the signal processor can directly shut down the switch element in the circuit.

[0090] (2) The present invention places the temperature sensor inside the battery charger, that is, beside the charging circuit, adopts an external contact type, and has good insulation treatment. The temperature collected by the temperature sensor will be converted into an electrical signal by the conditioning circuit, and then processed by the single-chip microcomputer for judgment. When it exceeds the set threshold, the switch element in the circuit can be directly turned off.

[0091] (3) The present invention proposes a "battery vehicle charging health status judgment strategy" by simulating the charging status of different types of batteries and chargers. The charging health status of lead-acid batteries is mainly divided into four categories: healthy, good, warning, and fault. Healthy: 0-35 degrees, good: 35-50 degrees, warning: 50-65, and fault: above 65 degrees. The charging health status of lithium batteries is mainly divided into four categories: healthy, good, warning, and fault. Healthy: 0-45 degrees, good: 45-55 degrees, warning: 55-65, and fault: above 65 degrees. The charging health status of chargers is mainly divided into four categories: healthy, good, warning, and fault. Healthy: 0-45 degrees, good: 45-55 degrees, warning: 55-65, and fault: above 65 degrees. An indicator light is provided for display. When the health status changes to a fault, the line switch is cut off and the alarm is turned on.

[0092] (4) The signals detected in real time by the electric battery vehicle of the present invention and the charging health status and other conditions can be transmitted to the cloud terminal in real time for information interaction, and instructions can also be sent directly through the cloud.

[0093] (5) Supports a variety of switching elements, and can use controllable IGBT or controllable MOSFET.

[0094] (6) Supports a variety of temperature sensors, including thermistors or thermocouples.

[0095] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery vehicle charging status real-time monitoring and health status evaluation system, characterized in that: include: A battery monitoring circuit, comprising a battery pack, a first temperature detection module for monitoring the real-time temperature of each battery in the battery pack, and a first switch for controlling the charging and disconnection of the battery pack; A charger monitoring circuit, comprising a charging circuit for charging the battery pack, a second temperature detection module and a first current detection module for monitoring the real-time temperature and real-time current of the charging circuit, and a second switch for controlling the charging on and off of the charging circuit; A judgment control module, which is respectively arranged in the battery monitoring circuit and the charger monitoring circuit, and is used to judge the health status of the battery and the charger respectively according to the real-time temperature of each battery and the real-time temperature and real-time current of the charger based on a preset judgment standard, and then control the charging switch of the battery pack and the charger respectively according to the health status of the battery and the charger; The cloud platform is used to detect the charging status of the battery pack and disconnect the charging of the battery pack after the battery pack is fully charged. At the same time, a timed task is set and the charging of the battery pack is stopped after the time point of the timed task is reached.

2. A battery vehicle charging status real-time monitoring and health status evaluation system according to claim 1, characterized in that: The first temperature detection module is a thermometer, and the input end of the thermometer is respectively connected to each of the batteries and is at a position M cm away from the positive and negative electrodes of the batteries; the output end of the thermometer is connected to the control end of the first switch, one end of the first switch is connected to one end of the charging port, the other end of the first switch is connected to the positive electrode of the battery pack, the negative electrode of the battery pack is connected to the other end of the charging port, and the control end of the first switch is connected to the cloud platform.

3. A battery vehicle charging status real-time monitoring and health status evaluation system according to claim 2, characterized in that: The judgment control module located in the battery monitoring circuit is arranged in the temperature measuring instrument.

4. A battery vehicle charging status real-time monitoring and health status evaluation system according to claim 2, characterized in that: The second temperature detection module and the first current detection module are respectively a temperature sensor and a current sensor. The charger monitoring circuit is arranged on a circuit board in the packaging shell, and includes a charging circuit, a second switch, a charging controller, a temperature sensor and a current sensor. One end of the charging circuit is connected to the mains by connecting the second switch in series, and the other end of the charging circuit is connected to the charging port. A current sensor is arranged at one end of the charging circuit connected to the charging port. The temperature sensor is arranged in the packaging shell and the distance between the temperature sensor and the charging circuit is less than n cm. The output ends of the temperature sensor and the current sensor are respectively connected to the input end of the charging controller. The output end of the charging controller is connected to the control end of the second switch, and the control end of the second switch is connected to the cloud platform.

5. A battery vehicle charging status real-time monitoring and health status evaluation system according to claim 4, characterized in that: The judgment control module located in the charger monitoring circuit is arranged in the charging controller.

6. A battery vehicle charging status real-time monitoring and health status evaluation system according to claim 2, characterized in that: The first switch is a controllable IGBT or a controllable MOSFET.

7. A battery vehicle charging status real-time monitoring and health status evaluation system according to claim 4, characterized in that: The second switch is a controllable IGBT or a controllable MOSFET.

8. A battery vehicle charging status real-time monitoring and health status evaluation system according to claim 1, characterized in that: The preset determination criteria include a determination criteria for the health status of a lead-acid battery, a determination criteria for the health status of a lithium battery charge, and a determination criteria for the health status of a charger charge.

9. A battery vehicle charging status real-time monitoring and health status evaluation system according to claim 8, characterized in that: The specific criteria for determining the health status of lead-acid batteries are: Healthy: 0-35 degrees, Good: 35-50 degrees, Warning: 50-65, Fault: above 65 degrees; The specific criteria for determining the healthy charging status of lithium batteries are: Healthy: 0-45 degrees, Good: 45-55 degrees, Warning: 55-65, Fault: above 65 degrees.

10. A battery vehicle charging status real-time monitoring and health status evaluation system according to claim 8, characterized in that: The judgment criteria of the charger charging health status include temperature judgment criteria and current judgment criteria, wherein the temperature judgment criteria are specifically: Healthy: 0-45 degrees, Good: 45-55 degrees, Warning: 55-65, Fault: above 65 degrees; The current determination criteria are specifically: When the charger current sensor detects that the current is higher than 1.5 times the maximum steady current and lasts for 10s, it directly switches to fault mode.

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