A charging method, system and storage medium for a charging pile

Abstract

The present application relates to the field of new energy charging piles, and in particular to a charging method, system and storage medium of a charging pile, which includes obtaining a charging protocol, timing data, ambient temperature data and battery status data, wherein the battery status data includes battery temperature data, battery power data, charging current data and charging voltage data; the charging protocol and a preset output adjustable interval threshold determine output power data; the battery temperature data and timing data determine battery temperature change rate data; the charging current data and charging voltage data determine battery heat generation rate data; the ambient temperature data, battery temperature change rate data and battery heat generation rate data determine heat dissipation performance data; the battery power data and a preset battery power threshold determine charging power data; the heat dissipation performance data, output power data, charging protocol, battery temperature threshold and charging power data determine new output power data and output it for charging. The present application has the effect of improving charging efficiency.

Description

Technical Field

[0001] The present application relates to the field of new energy charging piles, and in particular to a charging method and system for a charging pile and a storage medium thereof. Background Art

[0002] As new energy technologies become more and more advanced and new energy vehicles become more and more popular, people's demand for fast charging is getting higher and higher. The popularity of 800V fast charging platforms also requires the charging piles in charging stations to be adapted. Although the power of fast charging is constantly increasing and the charging time is constantly shortening, it also causes the heat generated during charging to increase faster and faster. The heat generated rapidly in a short period of time is difficult to dissipate quickly through heat dissipation, resulting in heat accumulation, which affects the charging efficiency. At the same time, excessive temperature will also affect the service life. Summary of the invention

[0003] In order to improve the problem of heat accumulation caused by over-fast charging, thereby affecting the charging efficiency and service life, the present application provides a charging method and system for a charging pile and a storage medium thereof.

[0004] The present application provides a charging method for a charging pile, which adopts the following technical solution: A charging method for a charging pile, comprising: Acquire charging protocol, timing data, ambient temperature data and battery status data, wherein the battery status data includes battery temperature data, battery power data, charging current data and charging voltage data; Determine and output output power data through the charging protocol and a preset output adjustable interval threshold; Determine battery temperature change rate data using the battery temperature data and the timing data; Determine battery heat generation rate data by using the charging current data and the charging voltage data; Determine heat dissipation performance data through the ambient temperature data, the battery temperature change rate data and the battery heat generation rate data; determine charging power data through the battery power data and a preset battery power threshold; Determine a charging curve by using the heat dissipation performance data, the output power data, the charging protocol, the battery temperature threshold and the charging power data; The new output power data is determined according to the charging curve and output for charging.

[0005] By adopting the above technical solution, the actual heat generation and heat dissipation of the battery is automatically calculated, which reduces the probability that the data given by the battery manufacturer does not match the actual situation, or that the battery manufacturer only gives a large range, resulting in poor results. The actual calculation obtains a more accurate charging performance of the battery, so that the output power can be adjusted in a targeted manner for heat generation, thereby improving charging efficiency.

[0006] Optionally, determining the heat dissipation performance data by using the ambient temperature data, the battery temperature change rate data and the battery heat generation rate data includes: The heat dissipation performance data includes total heat dissipation efficiency data, natural heat dissipation efficiency data and active heat dissipation efficiency data, and the battery status data includes a battery thermal conductivity threshold; The ambient temperature data and the battery temperature data determine a natural temperature difference; Determining the total heat dissipation efficiency data by using the battery temperature change rate data, a preset battery specific heat capacity threshold and the battery heat generation rate data; Acquiring the natural temperature difference and the total heat dissipation efficiency data multiple times according to a preset temperature difference test threshold; Determine a temperature difference curve by using a plurality of said natural temperature difference values; Determine a total heat dissipation difference curve through a plurality of the total heat dissipation efficiency data; The natural heat dissipation efficiency data and the active heat dissipation efficiency data are determined by the temperature difference curve, the total heat dissipation difference curve and a preset battery thermal conductivity threshold.

[0007] By adopting the above technical solution, the actual heat dissipation performance of the battery is automatically calculated, and is divided into natural heat dissipation and active heat dissipation, which is more accurate and makes the estimation of the heat dissipation performance at different battery temperatures more precise, that is, the heat dissipation performance of the battery at the highest temperature can be estimated.

[0008] Optional, including: Get fast charging data; Determine the critical temperature charging power by using the fast charging data, the battery temperature threshold, the natural heat dissipation efficiency data, the active heat dissipation efficiency data and the battery thermal conductivity threshold; Determine the maximum charging power and output it through the charging protocol and the output adjustable interval threshold; Real-time detection and acquisition of the battery temperature data, and determination of a critical charging signal through the maximum charging power, the timing data, the battery temperature data and the battery temperature threshold; The output power data is determined by the critical charging signal and the critical temperature charging power and output for charging.

[0009] By adopting the above technical solution, the accurate and stable maximum power can be directly estimated according to the heat dissipation performance of the battery at the highest temperature. By maintaining this maximum power, the battery temperature can be maintained at the critical temperature without exceeding it, making the battery charging efficiency higher and the charging speed faster.

[0010] Optional, including: Get power saving data; Determining test variable data by using the power saving data and a preset test threshold; Determine the new output power data by using the test variable data and the original output power data, and replace the original output power data for output; Determine charging power data using the battery power data and the timing data; Determine loss data using the charging power data and the output power data; Determine the lowest loss value through multiple loss data; The output power data is determined by the minimum loss value and output for charging.

[0011] By adopting the above technical solution, the power with the lowest loss is automatically tested and calculated, the charging loss is reduced, and the purpose of power saving is achieved.

[0012] Optional, including: Determine high efficiency temperature data by using the minimum loss value and the battery temperature data; Form a battery recording temperature library through the charging protocol and the high-efficiency temperature data; Determine the high-efficiency temperature data through the charging protocol and the battery record temperature library; Determining the fine-tuning power by using the high-efficiency temperature data and a preset fine-tuning threshold; Determine the new output power data by the fine-tuning power and the original output power data, and replace the original output power data for output; The loss data is obtained, and the minimum loss value is re-determined through a plurality of the loss data.

[0013] By adopting the above technical solution, the lowest loss value is recorded, and then when charging the same type of battery, the data can be directly read, and then targeted adjustments can be made, which is more convenient and quick.

[0014] Optional, including: Obtain output current data and output voltage data; Determine the output equivalent resistance value through the output power data, the output current data, the preset equivalent resistance value of the self and the output voltage data; Determine battery temperature estimation data by using the output equivalent resistance and a preset temperature resistance threshold; The battery temperature estimation data is used to replace the battery temperature data in the calculation. At this time, the output current data is used to replace the charging current data in the calculation. The output voltage data is used to replace the charging voltage data in the calculation.

[0015] By adopting the above technical solution, when the vehicle system does not support reading battery status data, calculations can still be performed to expand the adaptation range.

[0016] The present application provides a charging pile system, which adopts the following technical solution: A charging pile system, comprising: A handshake module obtains the charging protocol and outputs it; A detection module, used to detect the output end of the charging pile to obtain the output power data, the output current data and the output voltage data; An interactive module, which obtains the battery status data and outputs it; The environment module detects the ambient temperature outside the charging pile, obtains the ambient temperature data and outputs it; The data processing module receives the charging protocol, the output power data, the output current data, the output voltage data, the battery status data and the ambient temperature data, processes and calculates the data, obtains the output power data and outputs it to control charging.

[0017] By adopting the above technical solution, automatic information acquisition and automatic calculation can be achieved, the degree of intelligence is improved, and it is more convenient, fast and accurate.

[0018] The present application provides a computer-readable storage medium, which adopts the following technical solution: A computer-readable storage medium stores a computer program that can be loaded by a processor and executed for a charging method of a charging pile.

[0019] By adopting the above technical solution, the computer program is stored in a computer-readable storage medium.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. For heat generation, adjust the output power in a targeted manner to improve charging efficiency.

[0021] 2. Make the estimation of heat dissipation performance at different battery temperatures more accurate, that is, be able to estimate the heat dissipation performance of the battery at the highest temperature.

[0022] 3. Directly estimate the accurate and stable maximum power. Keeping at this maximum power, the battery temperature can be maintained at the critical temperature without exceeding it, making the battery charging efficiency higher and the charging speed faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of a charging method for a charging pile in an embodiment of the present application.

[0024] Figure 2 It is a flowchart diagram of step S13 to step S17.

[0025] Figure 3 It is a flowchart diagram of step S2 to step S26.

[0026] Figure 4 It is a flowchart diagram of step S3 to step S34.

[0027] Figure 5 It is a flowchart diagram of step S4 to step S46.

[0028] Figure 6 It is a flowchart diagram of step S5 to step S55.

[0029] Figure 7 It is a flowchart diagram of step S6 to step S63.

[0030] Figure 8 It is a module schematic diagram of a charging pile system in an embodiment of the present application.

[0031] Explanation of the accompanying drawings: 1. Handshake module; 2. Detection module; 3. Interaction module; 4. Environment module; 5. Data processing module. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-8 This application is described in further detail.

[0033] The present application embodiment discloses a charging method for a charging pile. Figure 1 and Figure 2 , the charging method of the charging pile includes the following steps: S1. Obtain charging protocol, timing data, ambient temperature data and battery status data, where the battery status data includes battery temperature data, battery power data, charging current data and charging voltage data; S11, determining output power data through a charging protocol and a preset output adjustable interval threshold and outputting the data; S12, determining battery temperature change rate data through battery temperature data and timing data; S13, determining battery heat generation rate data through charging current data and charging voltage data; S14, determining heat dissipation performance data through ambient temperature data, battery temperature change rate data, and battery heat generation rate data; S15, determining charging power data by comparing the battery power data with a preset battery power threshold; S16, determining a charging curve through heat dissipation performance data, output power data, charging protocol, battery temperature threshold and charging power data; S17. Determine new output power data through the charging curve and output it for charging.

[0034] In detail: The charging protocol is the charging formula and rated charging power that the battery can support obtained through the vehicle system or battery. The output adjustable interval threshold is the output power that the charging pile can achieve. The two intervals intersect to form an interval in which the charging pile can output and the battery can receive charging. This is the allowed variation range of the output power data. By combining the battery temperature data with time, the rate of change of the battery temperature can be obtained. If the timing data is 1min0s and the battery temperature data is 30℃, if the timing data is 1min1s and the battery temperature data is 31℃, the rate of battery change can be obtained as 1s / ℃, which is the battery temperature change rate data. The charging current data and the charging voltage data can obtain the equivalent internal resistance and charging power, so as to calculate the battery heat generation rate data, for example, P=U*I, R=U / I, and the power of resistance heating is P=I 2 *R or U 2 / R, the heat dissipation performance of the battery can be calculated through the ambient temperature, the heat generated by the battery and the change in battery temperature, which is the heat dissipation performance data. The battery power threshold is the maximum power of the battery. Subtracting it from the battery power data representing the current battery power can get the amount of power required to fully charge the battery, which is the charging power data; the heat generated by the battery can be obtained through the voltage and current data of the output power data, and combined with the heat dissipation performance data, the temperature of the battery at different powers can be estimated, thereby obtaining the charging curve. The charging curve includes the battery temperature at different powers, and different powers mean different charging speeds and different charging times. At this time, the output power data can be selected in the charging curve for charging according to the time selected by the user.

[0035] Reference Figure 3 , step S14 further comprises the following steps: S2, heat dissipation performance data including total heat dissipation efficiency data, natural heat dissipation efficiency data and active heat dissipation efficiency data, battery status data including battery thermal conductivity threshold; S21, determining a natural temperature difference between the ambient temperature data and the battery temperature data; S22, determining total heat dissipation efficiency data through battery temperature change rate data, a preset battery specific heat capacity threshold and battery heat generation rate data; S23, obtaining natural temperature difference and total heat dissipation efficiency data multiple times according to a preset temperature difference test threshold; S24, determining a temperature difference curve through a plurality of natural temperature difference values; S25, determining a total heat dissipation difference curve through a plurality of total heat dissipation efficiency data; S26. Determine natural heat dissipation efficiency data and active heat dissipation efficiency data through the temperature difference curve, the total heat dissipation difference curve, and a preset battery thermal conductivity threshold.

[0036] In detail: the difference between the battery temperature and the ambient temperature is the natural temperature difference. The battery specific heat capacity threshold is the comprehensive specific heat capacity of the battery. Combined with the battery temperature change, the battery heat change can be obtained. Combined with the battery temperature, the sum of the battery's heat dissipation performance can be obtained, which is the total heat dissipation efficiency data. The temperature difference test threshold is the first time the current model of battery is tested. The battery model can be read from the charging protocol. The temperature difference test threshold is used to obtain the natural temperature difference and total heat dissipation efficiency data again at regular intervals. During the charging process, the battery temperature at different time points is different, which leads to different temperature differences with the environment, and the speed of battery temperature change is different, which makes the total heat dissipation efficiency data different. The total heat dissipation efficiency data is the sum of the natural heat dissipation efficiency data and the active heat dissipation efficiency data, that is, passive, non-driven heat dissipation is natural heat dissipation. For example, a high-temperature object is placed in a low-temperature environment, and the heat dissipated naturally is the natural heat dissipation efficiency data, while those that require driving, such as water cooling, wind Cold means active heat dissipation, and this heat dissipation efficiency is the active heat dissipation efficiency data. Natural heat dissipation is greatly affected by temperature difference, while active heat dissipation is less affected by temperature difference. Therefore, the total heat dissipation efficiency data is different at different temperatures, and most of the difference is the natural heat dissipation efficiency data. Natural heat dissipation is not only affected by temperature difference, but also by the thermal conductivity of the battery itself. For example, if the thermal conductivity is high, the heat generated inside the battery can be exported to the surface faster, and then conducted to the low temperature environment through the temperature difference. Therefore, the natural heat dissipation efficiency data and the active heat dissipation efficiency data can be calculated. For example, in the first period of time, the natural temperature difference is 30℃, and the total heat dissipation efficiency data is 1000W. In the second period of time, the natural temperature difference is 40℃, and the total heat dissipation efficiency data is 1100W. In the third period of time, the natural temperature difference is 50℃, and the total heat dissipation efficiency data is 1200W. Therefore, the natural heat dissipation efficiency data can be regarded as the natural temperature difference*10W.

[0037] Reference Figure 4 , further comprising the following steps: S3, obtaining fast charging data; S31, determining the critical temperature charging power through the fast charging data, the battery temperature threshold, the natural heat dissipation efficiency data, the active heat dissipation efficiency data and the battery thermal conductivity threshold; S32, determining the maximum charging power through the charging protocol and the output adjustable interval threshold and outputting it; S33, real-time detection to obtain battery temperature data, and determine a critical charging signal through maximum charging power, timing data, battery temperature data and battery temperature threshold; S34, determining output power data through the critical charging signal and the critical temperature charging power and outputting it for charging.

[0038] Detailed: The fast charging data is input by the user. For example, the user who uses the charging pile selects fast charging. After receiving the fast charging data, fast charging is performed. The battery temperature threshold is the maximum temperature allowed by the battery. At this time, according to the total heat dissipation efficiency data and the battery temperature threshold, the highest allowable heat generation of the battery can be obtained, that is, the battery maintains the highest heat generation rate at the highest temperature, which is equal to the total heat dissipation efficiency data at the highest temperature. The maximum heat generation rate can be reversed to obtain the maximum allowable charging power, which is the critical temperature charging power. The maximum charging power within the adaptable range of the battery and the charging pile can be obtained through the charging protocol and the output adjustable interval threshold, which is the maximum charging power, and the output charging is performed according to this maximum charging power, that is, the output power data at this time is the maximum charging power, and then the battery temperature data is obtained in real time at a high frequency. The maximum charging power will cause the battery temperature to It rises rapidly, and because the battery surface temperature does not rise in time, the natural heat dissipation efficiency does not rise adaptively, which will cause a large amount of heat to accumulate inside the battery. At this time, if it is detected that the battery surface temperature has reached the battery temperature threshold and the charging power is reduced, the temperature inside the battery has long been higher than the battery temperature threshold, and the heat accumulated inside the battery is released at this time, which will also cause the external temperature of the battery to be higher than the battery temperature threshold. Therefore, it is necessary to calculate the heat generation through the maximum charging power, that is, the battery heat generation rate data, and then calculate the difference with the total heat dissipation efficiency data at this time, which is the heat accumulated in the battery, and then compare it with the heat accumulation threshold. Once the battery temperature data and the heat accumulated in the battery are about to reach the battery temperature threshold, the critical charging signal is output in advance. At this time, the output charging power is reduced to the critical temperature charging power, so that the battery can be maintained at the highest temperature and receive the highest power input.

[0039] Reference Figure 5 , further comprising the following steps: S4, obtaining power saving data; S41, determining test variable data through power saving data and a preset test threshold; S42, determining new output power data by testing variable data and original output power data, and replacing the original output power data for output; S43, determining charging power data through battery power data and timing data; S44, determining loss data through the charging power data and the output power data; S45, determining a minimum loss value through multiple loss data; S46. Determine output power data using the minimum loss value and output it for charging.

[0040] Detailed: The power saving data is input by the user. For example, the user who uses the charging pile selects the power saving mode. After receiving the power saving data, low-loss charging is performed. The test threshold is the first time that the battery of this model is charged in the power saving mode. The test variable data is output to test the output power data from low to high. According to the change of the battery power data combined with the time, the actual charging power received by the battery can be obtained, and the charging power, that is, the charging power data, can be calculated in combination with the time. Suppose that in the first minute, the output power data is 1000W and the charging power data is 900W. In the second minute, the output power data is 1050W and the charging power data is 1000W. In the third minute, the output power data is 1100W and the charging power data is 1030W. The loss data can be obtained as 100W, 50W, and 70W respectively. At this time, 50W is the lowest loss value, so the output power data of the second minute has the smallest loss. After the test, the 1000W corresponding to the second minute will be used as the output power data for output charging.

[0041] Reference Figure 6 , further comprising the following steps: S5. Determine high-efficiency temperature data through the minimum loss value and battery temperature data; S51, forming a battery recording temperature library through charging protocol and high-efficiency temperature data; S52, determining high-efficiency temperature data through a charging protocol and a battery record temperature library; S53, determining the fine-tuning power through the high-efficiency temperature data and a preset fine-tuning threshold; S54, determining new output power data by fine-tuning the power and the original output power data, and replacing the original output power data for output; S55. Obtain loss data, and re-determine the minimum loss value through multiple loss data.

[0042] In detail: the battery temperature data corresponding to the output power data corresponding to the minimum loss value is used as the high-efficiency temperature data, that is, the battery temperature data corresponding to the output power data of 1050W and the charging power data of 1000W is used as the high-efficiency temperature data, and then combined with the model data of this battery, stored to form a battery record temperature library, and then during the handshake of the charging protocol, when the model of this battery is obtained again, the corresponding high-efficiency temperature data can be directly called from the battery record temperature library; the fine-tuning threshold is used to verify this high-efficiency temperature data, and the fine-tuning threshold is set to ±10%. When charging is performed using the output power data corresponding to the high-efficiency temperature data, a floating adjustment of ±10% is performed on the output power data, and then steps S42-S46 are repeated to quickly obtain the most suitable minimum loss value, so as to quickly and specifically adapt batteries of the same model but different individuals.

[0043] Reference Figure 7 , further comprising the following steps: S6, obtaining output current data and output voltage data; S61, determining an output equivalent resistance value through output power data, output current data, a preset own equivalent resistance value and output voltage data; S62, determining battery temperature estimation data by outputting an equivalent resistance value and a preset temperature resistance value threshold; S63, using the estimated battery temperature data to participate in the calculation instead of the battery temperature data, at this time using the output current data to participate in the calculation instead of the charging current data, and using the output voltage data to participate in the calculation instead of the charging voltage data.

[0044] Detailed: When the battery or vehicle system does not support the charging pile to read the battery status data, it is impossible to obtain data such as charging current data, charging voltage data and battery temperature data, but the battery is equivalent to the external load of the charging pile. If the external load changes at this time, the current and voltage output by the charging pile will change. Therefore, the range of various battery data can be estimated. At this time, the output current data and output voltage data of the charging pile are obtained. The equivalent resistance value is the equivalent comprehensive resistance value of the charging pile's own resistance to the output end, and then the output power data and the equivalent resistance value of the external can be estimated. Resistance, which is the output equivalent resistance. The temperature resistance threshold is the corresponding relationship between the temperature and the resistance corresponding to the battery model obtained on the charging protocol, that is, the relationship between the temperature of this model of battery and the resistance increased due to the temperature. Then, the output equivalent resistance and the temperature resistance threshold are calculated to estimate the current battery temperature, which is the battery temperature estimation data. This battery temperature estimation data replaces the battery temperature data in the calculation of all the above steps. Similarly, the obtained output current data replaces the charging current data in the calculation of all the above steps, and the output voltage data replaces the charging voltage data in the calculation of all the above steps.

[0045] The present application embodiment discloses a charging pile system. Figure 8 The charging pile system includes a handshake module 1, a detection module 2, an interaction module 3, an environment module 4 and a data processing module 5. The handshake module 1 is used to perform a protocol handshake with the battery, and output the handshake result and fixed parameter data of the battery, such as battery model, internal resistance, etc., as a charging protocol to the data processing module 5.

[0046] Reference Figure 8 , the detection module 2 can be an energy meter or other instruments and equipment with current detection and voltage detection, connected to the output end of the charging pile, such as a charging gun, to obtain the output power data, output current data and output voltage data of the charging gun and output them to the data processing module 5. The interaction module 3 is a signal transmission module, which is usually integrated on the data processing module 5, or integrated on the same circuit board. The interaction module 3 is used to interact with the battery or the vehicle system to obtain the battery status data, and then output it to the data processing module 5. The environment module 4 can use a temperature sensor to obtain the ambient temperature outside the charging pile, obtain the ambient temperature data and output it to the data processing module 5.

[0047] Reference Figure 8 The data processing module 5 includes a processor and a database. The database is used to store various threshold data, such as output adjustable interval threshold, battery specific heat capacity threshold and other threshold data. The processor is used to receive charging protocol, output power data, output current data, output voltage data, battery status data and ambient temperature data, and then call the corresponding threshold data from the database, process and calculate the data to obtain output power data and output it for charging control.

[0048] The processor may include a central processing unit such as a CPU or MPU or a host system built around a CPU or MPU, including hardware or software. After the meter has a processor, people can freely control the metering instrument through programming to make it run according to people's wishes. The processor can control local measurement transmission, remote measurement transmission, remote communication, etc. through internal protocols. Internal protocols refer to all protocols that achieve mutual communication or links within the same metering instrument or the same system, including: human-computer interaction protocols, software / hardware (interface) protocols, chip bus (C-Bus) protocols, internal bus (I-Bus) protocols, etc. Part or all of the protocols. With the development of integrated circuit technology, some protocols that belong to the external bus (E-Bus) protocol are also classified as internal protocols after the external bus (E-Bus) is integrated into the chip.

[0049] The embodiment of the present application discloses a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program that can be loaded by a processor and execute a charging method for a charging pile.

[0050] Computer-readable storage media include, for example, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A charging method for a charging pile, characterized in that: include: Acquire charging protocol, timing data, ambient temperature data and battery status data, wherein the battery status data includes battery temperature data, battery power data, charging current data and charging voltage data; Determine and output output power data through the charging protocol and a preset output adjustable interval threshold; Determine battery temperature change rate data using the battery temperature data and the timing data; Determine battery heat generation rate data by using the charging current data and the charging voltage data; Determine heat dissipation performance data by using the ambient temperature data, the battery temperature change rate data and the battery heat generation rate data; Determining charging power data by comparing the battery power data with a preset battery power threshold; Determine a charging curve by using the heat dissipation performance data, the output power data, the charging protocol, the battery temperature threshold and the charging power data; The new output power data is determined according to the charging curve and output for charging.

2. A charging method for a charging pile according to claim 1, characterized in that: Determining heat dissipation performance data by using the ambient temperature data, the battery temperature change rate data, and the battery heat generation rate data includes: The heat dissipation performance data includes total heat dissipation efficiency data, natural heat dissipation efficiency data and active heat dissipation efficiency data, and the battery status data includes a battery thermal conductivity threshold; The ambient temperature data and the battery temperature data determine a natural temperature difference; Determining the total heat dissipation efficiency data by using the battery temperature change rate data, a preset battery specific heat capacity threshold and the battery heat generation rate data; Acquiring the natural temperature difference and the total heat dissipation efficiency data multiple times according to a preset temperature difference test threshold; Determine a temperature difference curve by using a plurality of said natural temperature difference values; Determine a total heat dissipation difference curve through a plurality of the total heat dissipation efficiency data; The natural heat dissipation efficiency data and the active heat dissipation efficiency data are determined by the temperature difference curve, the total heat dissipation difference curve and a preset battery thermal conductivity threshold.

3. A charging method for a charging pile according to claim 2, characterized in that: include: Get fast charging data; Determine the critical temperature charging power by using the fast charging data, the battery temperature threshold, the natural heat dissipation efficiency data, the active heat dissipation efficiency data and the battery thermal conductivity threshold; Determine the maximum charging power and output it through the charging protocol and the output adjustable interval threshold; Real-time detection and acquisition of the battery temperature data, and determination of a critical charging signal through the maximum charging power, the timing data, the battery temperature data and the battery temperature threshold; The output power data is determined by the critical charging signal and the critical temperature charging power and output for charging.

4. A charging method for a charging pile according to claim 3, characterized in that: include: Get power saving data; Determining test variable data by using the power saving data and a preset test threshold; Determine the new output power data by using the test variable data and the original output power data, and replace the original output power data for output; Determine charging power data using the battery power data and the timing data; Determine loss data using the charging power data and the output power data; Determine the lowest loss value through multiple loss data; The output power data is determined by the minimum loss value and output for charging.

5. A charging method for a charging pile according to claim 4, characterized in that: include: Determine high efficiency temperature data by using the minimum loss value and the battery temperature data; Form a battery recording temperature library through the charging protocol and the high-efficiency temperature data; Determine the high-efficiency temperature data through the charging protocol and the battery record temperature library; Determining the fine-tuning power by using the high-efficiency temperature data and a preset fine-tuning threshold; Determine the new output power data by the fine-tuning power and the original output power data, and replace the original output power data for output; The loss data is obtained, and the minimum loss value is re-determined through a plurality of the loss data.

6. A charging method for a charging pile according to claim 5, characterized in that: include: Obtain output current data and output voltage data; Determine the output equivalent resistance value through the output power data, the output current data, the preset equivalent resistance value of the self and the output voltage data; Determine battery temperature estimation data by using the output equivalent resistance and a preset temperature resistance threshold; The battery temperature estimation data is used to replace the battery temperature data in the calculation. At this time, the output current data is used to replace the charging current data in the calculation. The output voltage data is used to replace the charging voltage data in the calculation.

7. A charging pile system, using the charging method of a charging pile according to claim 6, characterized in that: include: A handshake module (1) obtains the charging protocol and outputs it; A detection module (2) is used to detect the output end of the charging pile to obtain the output power data, the output current data and the output voltage data; An interactive module (3) acquires the battery status data and outputs it; An environmental module (4) detects the ambient temperature outside the charging pile, obtains ambient temperature data and outputs it; A data processing module (5) receives the charging protocol, the output power data, the output current data, the output voltage data, the battery status data and the ambient temperature data, processes and calculates the data, obtains the output power data and outputs it, so as to control charging.

8. A computer-readable storage medium, characterized in that: A computer program is stored which can be loaded by a processor and executes a charging method for a charging pile according to any one of claims 1 to 6.

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