Temperature control method and system based on liquid-cooled supercharging and high-power charging

Abstract

The present invention relates to the technical field of liquid-cooled charging piles, and discloses a temperature control method and system based on liquid-cooled super-charging high-power charging, the method comprising: using heat generation parameters to calculate the thermal conductivity of the modeled charging pile, using heat generation parameters to calculate the average specific heat capacity of the modeled charging pile, and calculating the heat generation and heat consumption of the modeled charging pile; calculating the heat generation numerical model of the modeled charging pile, and selecting the temperature key points of the liquid-cooled super-charging pile from the temperature field distribution; constructing the temperature control parameters of the liquid-cooled super-charging pile, calculating the heat consumption numerical model of the modeled charging pile under the temperature control parameters, and detecting the temperature value of the temperature key point under the heat consumption numerical model; constructing a curve graph between the temperature control parameters and the temperature value, using the curve graph to determine the final temperature control parameters of the liquid-cooled super-charging pile, and converting the current temperature control parameters into the final temperature control parameters. The present invention can analyze the temperature control capabilities of different cooling parameters at the temperature collection point of the liquid-cooled charging pile.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid-cooled charging piles, and in particular to a temperature control method and system based on liquid-cooled super-charging and high-power charging. Background Art

[0002] A liquid-cooled charging pile refers to a device that uses liquid cooling technology to set up a special liquid circulation channel between the cable and the charging gun. Liquid coolant is added to the channel to dissipate heat. The coolant circulation is driven by a power pump to take away the heat generated during the charging process. The liquid-cooled charging pile can increase the cable transmission power and achieve high-power charging.

[0003] At present, there has been extensive research at home and abroad on temperature control based on liquid-cooled supercharging and high-power charging. Generally, the temperature is controlled by cooling liquid and temperature threshold. For example, the patent publication number is CN110602922B, the publication date is 2020-12-08, and the name of the invention is: A temperature control method in a charging pile based on PWM fan control. The application discloses a temperature control method in a charging pile based on PWM fan control, which is used for a charging pile with a PWM fan installed inside. It is characterized in that the temperature control method in a charging pile based on PWM fan control comprises the following steps: Step 1, presetting multiple temperature collection points in the charging pile, and for each temperature collection point, The temperature collection points collect a number of real-time temperature data respectively, and form real-time temperature data sequences corresponding to different temperature collection points respectively; step 2, filter out the maximum value and the minimum value of the real-time temperature data in each real-time temperature data sequence respectively, calculate the effective temperature value of each real-time temperature data sequence after the filtering process, and form a temperature effective value sequence containing all temperature effective values; step 3, select the maximum value and the minimum value of the temperature effective value in the temperature effective value sequence, and calculate the temperature difference between the maximum value and the minimum value of the temperature effective value; step 4, pre-set the starting temperature threshold of the PWM fan, and calculate the temperature difference between the maximum value and the minimum value of the temperature effective value according to the temperature effective value sequence; step 5, pre-set the starting temperature threshold of the PWM fan, and calculate the temperature difference between the maximum value and the minimum value of the temperature effective value according to the temperature effective value sequence; step 6, pre-set the starting temperature threshold of the PWM fan, and calculate the temperature difference between the maximum value and the minimum value of the temperature effective value according to the temperature effective value sequence; step 7, pre-set the starting temperature threshold of the PWM fan according to the temperature effective value sequence; step 8, pre-set the starting temperature threshold of the PWM fan according to the temperature effective value sequence; step 9, pre-set the starting temperature threshold of the PWM fan according to the temperature effective value sequence; step 10, pre-set the starting temperature threshold of the PWM fan according to the temperature effective value sequence; step 11, pre-set the starting temperature threshold of the PWM fan according to the temperature effective value sequence; step 12, pre-set the starting temperature threshold of the PWM fan according to the temperature effective value sequence; step 13, pre-set the starting temperature threshold of the PWM fan according to the temperature effective value sequence; step 14, pre-set the starting temperature threshold of the PWM fan according to the temperature effective value sequence; step 15, pre-set the starting temperature threshold of the PWM fan according to the temperature effective value sequence; step 16, pre-set the starting temperature threshold of the PWM fan according to the temperature effective value sequence; The maximum value of the effective value and the starting temperature threshold are used to make a judgment: when the maximum value of the temperature effective value is greater than the starting temperature threshold, the PWM output of the PWM fan is started, and the duty cycle of the PWM output is set to a, a∈(0,100%); otherwise, the PWM output of the PWM fan is not started; step 5, presetting a first temperature difference threshold for starting to increase the PWM output duty cycle and a second temperature difference threshold for starting to reduce the PWM output duty cycle; wherein the first temperature difference threshold is greater than the second temperature difference threshold; step 6, adjusting the duty cycle of the PWM output according to the temperature difference, the first temperature difference threshold and the second temperature threshold: when the temperature difference is greater than When the temperature difference is greater than the first temperature difference threshold, the duty cycle of the PWM output is increased; when the temperature difference is less than the second temperature difference threshold, the duty cycle of the PWM output is reduced; when the temperature difference is between the first temperature difference threshold and the second temperature difference threshold, the duty cycle of the PWM output is not adjusted; step 7, obtaining the real-time temperature data value of the PWM fan; step 8, making a judgment based on the real-time temperature data value of the PWM fan and the start-up temperature threshold: when the real-time temperature data value of the PWM fan is less than the start-up temperature threshold, turning off the PWM output of the PWM fan; otherwise, maintaining the PWM output of the PWM fan.

[0004] The above application needs to control the duty cycle of PWM output by comparing the temperature difference with the temperature difference threshold, so as to control the cooling capacity of the fan through the duty cycle of PWM output. In this process, the determination of temperature collection points and the heat dissipation capacity of different fan parameters are involved. However, the above application does not provide detailed information on the determination of temperature collection points, nor does it analyze the effect of the duty cycle of the fan's PWM output on the heat dissipation capacity of the charging pile. Therefore, a solution is urgently needed to analyze the temperature control capacity of different cooling parameters at the temperature collection point of the liquid-cooled charging pile. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a temperature control method and system based on liquid-cooled supercharging and high-power charging, which can analyze the temperature control capabilities of different cooling parameters at the temperature collection point of the liquid-cooled charging pile.

[0006] In a first aspect, the present invention provides a temperature control method based on liquid-cooled supercharging and high-power charging, comprising:

[0007] Measuring geometric values ​​of a liquid-cooled super charging pile, using the geometric values ​​to perform three-dimensional modeling on the liquid-cooled super charging pile to obtain a modeled charging pile, and determining a fluid flow area in the modeled charging pile;

[0008] Collecting heat generation parameters in the fluid flow area, calculating the thermal conductivity of the modeled charging pile using the heat generation parameters, calculating the average specific heat capacity of the modeled charging pile using the heat generation parameters, and calculating the heat generation and heat consumption of the modeled charging pile using the heat generation parameters;

[0009] Calculate the heat generation numerical model of the modeled charging pile according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, construct the temperature field distribution of the modeled charging pile using the heat generation numerical model, and select the temperature key point of the liquid-cooled super charging pile from the temperature field distribution;

[0010] Constructing temperature control parameters of the liquid-cooled super charging pile, calculating a heat consumption numerical model of the modeled charging pile under the temperature control parameters, and detecting the temperature value of the temperature key point under the heat consumption numerical model;

[0011] Construct a curve graph between the temperature control parameter and the temperature value, use the curve graph to determine the final temperature control parameter of the liquid-cooled super charging pile, and obtain the current temperature control parameter of the liquid-cooled super charging pile. After converting the current temperature control parameter into the final temperature control parameter, complete the temperature control of the liquid-cooled super charging pile and obtain the temperature control result of the liquid-cooled super charging pile.

[0012] In a possible implementation manner of the first aspect, collecting the heat generation parameters in the fluid flow area includes:

[0013] Obtaining the thickness, half-heating time, heat flow distance, specific heat capacity and density of the modeled charging pile in the fluid flow area;

[0014] Obtaining the surface area, temperature parameter, current parameter and resistance parameter of the modeled charging pile in the fluid flow region;

[0015] The thickness, the half-heating time, the heat flow distance, the specific heat capacity, the density, the surface area, the temperature parameter, the current parameter and the resistance parameter are used as heat generation parameters in the fluid flow area.

[0016] In a possible implementation of the first aspect, calculating the thermal conductivity of the modeled charging pile by using the heat generation parameter includes:

[0017] Obtaining the thickness, half-heating time, heat flow distance, specific heat capacity and density of the modeled charging pile from the heat generation parameters;

[0018] According to the thickness and the half-heating time, a formula is used to calculate the vertical thermal diffusion coefficient of the modeled charging pile;

[0019] The vertical thermal conductivity and the horizontal thermal conductivity are used as the thermal conductivity of the modeled charging pile.

[0020] The calculating the average specific heat capacity of the modeled charging pile by using the heat generation parameter includes:

[0021] Obtaining the specific heat capacity of the modeled charging pile from the heat generation parameter;

[0022] According to the specific heat capacity, the average specific heat capacity of the modeled charging pile is calculated using a formula.

[0023] The step of calculating the heat generation and heat consumption of the modeled charging pile by using the heat generation parameter includes:

[0024] Obtaining the surface area, thickness, temperature parameter, current parameter and resistance parameter of the modeled charging pile from the heat generation parameter;

[0025] Calculate the heat generated by the modeled charging pile using a formula according to the current parameter and the resistance parameter;

[0026] According to the surface area, the thickness and the temperature parameters, the heat consumption of the modeled charging pile is calculated as follows.

[0027] The calculating the heat generation numerical model of the modeled charging pile according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption includes:

[0028] According to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, a heat generation numerical model of the modeled charging pile is calculated using a formula.

[0029] The step of selecting the key temperature point of the liquid-cooled super charging pile from the temperature field distribution includes:

[0030] Identify, from the temperature field distribution, an x-axis temperature sequence, a y-axis temperature sequence, and a z-axis temperature sequence of the liquid-cooled super charging pile on the x-axis, the y-axis, and the z-axis, respectively;

[0031] Calculate the x-axis temperature variance, y-axis temperature variance, and z-axis temperature variance on the x-axis temperature sequence, the y-axis temperature sequence, and the z-axis temperature sequence respectively;

[0032] Based on the x-axis temperature variance, the y-axis temperature variance, and the z-axis temperature variance, temperature key points of the liquid-cooled super charging pile are selected from the x-axis, the y-axis, and the z-axis.

[0033] The calculating of the heat consumption numerical model of the modeled charging pile under the temperature control parameters includes:

[0034] Calculate the mass conservation model of the modeled charging pile under the temperature control parameters using a formula;

[0035] Calculate the momentum conservation model of the modeled charging pile under the temperature control parameters using a formula;

[0036] Calculate the energy conservation model of the modeled charging pile under the temperature control parameters using a formula;

[0037] The mass conservation model, the momentum conservation model and the energy conservation model are used as the heat consumption numerical model of the modeled charging pile.

[0038] The converting the current temperature control parameter into the final temperature control parameter comprises:

[0039] Inputting the current temperature control parameters into a preset PID controller;

[0040] In the PID controller, the intermediate temperature control parameter before the current temperature control parameter is converted into the final temperature control parameter is calculated using the following formula;

[0041] The current temperature control parameter is converted into the final temperature control parameter using the intermediate temperature control parameter.

[0042] In a second aspect, the present invention provides a temperature control system based on liquid-cooled supercharging and high-power charging, the system comprising:

[0043] an area determination module, configured to measure geometric values ​​of a liquid-cooled super charging pile, perform three-dimensional modeling of the liquid-cooled super charging pile using the geometric values ​​to obtain a modeled charging pile, and determine a fluid flow area in the modeled charging pile;

[0044] A heat calculation module, used to collect heat generation parameters in the fluid flow area, calculate the thermal conductivity of the modeled charging pile using the heat generation parameters, calculate the average specific heat capacity of the modeled charging pile using the heat generation parameters, and calculate the heat generation and heat consumption of the modeled charging pile using the heat generation parameters;

[0045] A key point selection module, used to calculate the heat generation numerical model of the modeled charging pile according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, construct the temperature field distribution of the modeled charging pile using the heat generation numerical model, and select the temperature key points of the liquid-cooled super charging pile from the temperature field distribution;

[0046] A temperature detection module, used to construct the temperature control parameters of the liquid-cooled super charging pile, calculate the heat consumption numerical model of the modeled charging pile under the temperature control parameters, and detect the temperature value of the temperature key point under the heat consumption numerical model;

[0047] A temperature control module is used to construct a curve graph between the temperature control parameters and the temperature values, use the curve graph to determine the final temperature control parameters of the liquid-cooled super charging pile, and obtain the current temperature control parameters of the liquid-cooled super charging pile. After converting the current temperature control parameters into the final temperature control parameters, the temperature control of the liquid-cooled super charging pile is completed to obtain the temperature control result of the liquid-cooled super charging pile.

[0048] Compared with the prior art, the technical principle and beneficial effects of this solution are:

[0049] The embodiment of the present invention uses the geometric numerical values ​​to perform three-dimensional modeling of the liquid-cooled super charging pile, so as to simulate the heat distribution of the liquid-cooled super charging pile and the heat dissipation capacity of the coolant on the modeled charging pile. The embodiment of the present invention collects the heat generation parameters in the fluid flow area to perform a large number of heat generation tests on the fluid flow area, and records the heat generation parameters of the fluid flow area, so as to subsequently use the heat generation parameters to simulate the heat generation process of the modeled charging pile. The embodiment of the present invention calculates the heat generation numerical model of the modeled charging pile according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, so as to simulate the heat generation process of the modeled charging pile. Furthermore, the embodiment of the present invention selects the temperature key points of the liquid-cooled super charging pile from the temperature field distribution, so as to select the temperature key points with obvious temperature changes from the temperature field distribution. Furthermore, the embodiment of the present invention calculates the heat consumption numerical model of the modeled charging pile under the temperature control parameters to analyze the heat dissipation capacity of the coolant in the modeled charging pile. Therefore, the temperature control method and system based on liquid-cooled supercharging and high-power charging proposed in the embodiments of the present invention can analyze the temperature control capabilities of different cooling parameters at the temperature collection point of the liquid-cooled charging pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0052] Figure 1 A schematic flow chart of a temperature control method for liquid-cooled supercharging and high-power charging provided in one embodiment of the present invention;

[0053] Figure 2 A schematic diagram of a module of a temperature control system based on liquid-cooled supercharging and high-power charging provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0054] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0055] An embodiment of the present invention provides a temperature control method based on liquid-cooled supercharged high-power charging, and the execution subject of the temperature control method based on liquid-cooled supercharged high-power charging includes but is not limited to at least one of the electronic devices such as a server and a terminal that can be configured to execute the method provided by the embodiment of the present invention. In other words, the temperature control method based on liquid-cooled supercharged high-power charging can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, etc. The server can be an independent server, or it can be a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (Content Delivery Network, CDN), and big data and artificial intelligence platforms.

[0056] See also Figure 1 The figure shows the process flow of the temperature control method based on liquid cooling super charging and high power charging provided by one embodiment of the present invention. Figure 1 The temperature control method based on liquid cooling super charging and high power charging described in the specification includes:

[0057] S1. Measure geometric values ​​of a liquid-cooled super charging pile, use the geometric values ​​to perform three-dimensional modeling of the liquid-cooled super charging pile to obtain a modeled charging pile, and determine a fluid flow area in the modeled charging pile.

[0058] In the embodiment of the present invention, the liquid-cooled super charging pile refers to a device that uses liquid cooling technology to set a special liquid circulation channel between the cable and the charging gun, and adds liquid coolant for heat dissipation in the channel. The coolant circulation is driven by a power pump to take away the heat generated during the charging process, so as to increase the cable transmission power and realize high-power charging. Furthermore, the geometric value refers to the parameters such as length, width, volume and area of ​​the liquid-cooled super charging pile in the spatial structure.

[0059] Furthermore, the embodiment of the present invention performs three-dimensional modeling of the liquid-cooled super charging pile by utilizing the geometric numerical values, so as to simulate the heat distribution of the liquid-cooled super charging pile and the heat dissipation capacity of the coolant on the modeled charging pile.

[0060] Furthermore, in an embodiment of the present invention, the fluid flow area refers to an area on the liquid-cooled super charging pile that will generate heat due to charging.

[0061] Optionally, the process of determining the fluid flow area in the modeled charging pile can be performed by recording the temperature of the modeled charging pile before charging and recording the temperature of the modeled charging pile after charging. When the temperature of the modeled charging pile after charging is higher than the temperature of the modeled charging pile before charging, the area in the modeled charging pile corresponding to the temperature of the modeled charging pile after charging is used as the fluid flow area.

[0062] S2. Collect the heat generation parameters in the fluid flow area, use the heat generation parameters to calculate the thermal conductivity of the modeled charging pile, use the heat generation parameters to calculate the average specific heat capacity of the modeled charging pile, and use the heat generation parameters to calculate the heat generation and heat consumption of the modeled charging pile.

[0063] The embodiment of the present invention collects the heat generation parameters in the fluid flow area to perform a large number of heat generation tests on the fluid flow area, and records the heat generation parameters of the fluid flow area, so as to subsequently use the heat generation parameters to simulate the heat generation process of the modeled charging pile.

[0064] In one embodiment of the present invention, the collecting of heat generation parameters in the fluid flow area includes: obtaining the thickness, half-heating time, heat flow distance, specific heat capacity and density of the modeled charging pile in the fluid flow area; obtaining the surface area, temperature parameters, current parameters and resistance parameters of the modeled charging pile in the fluid flow area; using the thickness, the half-heating time, the heat flow distance, the specific heat capacity, the density, the surface area, the temperature parameters, the current parameters and the resistance parameters as the heat generation parameters in the fluid flow area.

[0065] Among them, the half-heating time refers to the time required for the surface temperature of the cold liquid charging pile to rise to half of the maximum value after receiving the light pulse irradiation, the heat flow distance refers to the total distance the heat flows in the cold liquid charging pile, the temperature parameters include the hot surface temperature on the modeling charging pile, the cold surface temperature on the modeling charging pile, the surface temperature on the modeling charging pile, the fluid temperature in the modeling charging pile, the temperature on any radiating surface of the modeling charging pile under thermal radiation, and the temperature on any radiating surface except the temperature on any radiating surface of the modeling charging pile under thermal radiation, the current parameter refers to the current value flowing through the ohmic resistor in the cold liquid charging pile, and the resistance parameter refers to the resistance value of the ohmic resistor in the cold liquid charging pile.

[0066] In one embodiment of the present invention, the use of the heat generation parameters to calculate the thermal conductivity of the modeled charging pile includes: obtaining the thickness, half-heating time, heat flow distance, specific heat capacity and density of the modeled charging pile from the heat generation parameters; and calculating the vertical thermal diffusion coefficient of the modeled charging pile according to the thickness and the half-heating time using the following formula:

[0067]

[0068] Among them, α v represents the thermal diffusion coefficient in the vertical direction, d represents the thickness of the modeled charging pile in the vertical direction, and t 50 represents the half-heating time, and 0.1388 represents the proportionality constant under adiabatic conditions;

[0069] Based on the vertical thermal diffusion coefficient, the specific heat capacity and the density, the vertical thermal conductivity of the modeled charging pile is calculated using the following formula:

[0070] λ v (T) = α v (T)C p (T)ρ(T)

[0071] Among them, λ v (T) represents the vertical thermal conductivity of the modeled charging pile under the premise of T, T represents the temperature independent variable to be solved on the modeled charging pile, α v (T) represents the vertical thermal diffusion coefficient of the modeled charging pile under the premise of T, C p (T) represents the specific heat capacity of the modeled charging pile under the premise of T, and ρ(T) represents the density of the modeled charging pile under the premise of T;

[0072] According to the heat flow path, the horizontal thermal diffusion coefficient of the modeled charging pile is calculated using the following formula:

[0073]

[0074] Among them, α h represents the horizontal thermal diffusion coefficient, l represents the horizontal heat flow distance of the modeled charging pile, and t 50 represents the half-heating time, and 0.1388 represents the proportionality constant under adiabatic conditions;

[0075] According to the horizontal thermal diffusion coefficient, the specific heat capacity and the density, the horizontal thermal conductivity of the modeled charging pile is calculated using the following formula:

[0076] λ h (T) = α h (T)×C p (T)×ρ(T)

[0077] Among them, λ h (T) represents the horizontal thermal conductivity, T represents the temperature independent variable to be solved on the modeled charging pile, α h (T) represents the horizontal thermal diffusion coefficient of the modeled charging pile under the premise of T, C p(T) represents the specific heat capacity of the modeled charging pile under the premise of T, and ρ(T) represents the density of the modeled charging pile under the premise of T;

[0078] The vertical thermal conductivity and the horizontal thermal conductivity are used as the thermal conductivity of the modeled charging pile.

[0079] In one embodiment of the present invention, the calculating the average specific heat capacity of the modeled charging pile using the heat generation parameter includes: obtaining the specific heat capacity of the modeled charging pile from the heat generation parameter; and calculating the average specific heat capacity of the modeled charging pile using the following formula according to the specific heat capacity:

[0080]

[0081] in, represents the average specific heat capacity, C p represents specific heat capacity, t 1 ~t 2 represents the temperature range of the modeled charging pile, and t represents the temperature variable.

[0082] In one embodiment of the present invention, the heat generation and heat consumption of the modeled charging pile are calculated by using the heat generation parameters, including: obtaining the surface area, thickness, temperature parameter, current parameter and resistance parameter of the modeled charging pile from the heat generation parameters; and calculating the heat generation of the modeled charging pile according to the current parameter and the resistance parameter using the following formula:

[0083] Q production =Q 1 +Q 2 +Q 3

[0084] Among them, Q production represents the heat generation of the modeled charging pile, Q 1 represents the heat released by the chemical reaction inside the modeled charging pile, Q 2 represents the heat generated by the resistor when the internal current of the modeled charging pile flows through the resistor, Q 3 represents the polarization heat generated when the modeled charging pile charges the user, Q 1 , Q 2 , Q 3 are calculated based on the current parameter and the resistance parameter;

[0085] According to the surface area, the thickness and the temperature parameter, the heat consumption of the modeled charging pile is calculated using the following formula:

[0086]

[0087] Q convection =βs(T3 -T 4 )

[0088]

[0089] Q consumption =Q conduction +Q convection +Q radiation

[0090] Among them, Q consumption represents the heat consumption of the modeled charging pile, Q conduction represents the heat consumption of the modeled charging pile under heat conduction, Q convection represents the heat consumption of the modeled charging pile under thermal convection, Q radiation represents the heat consumption of the modeled charging pile under thermal radiation, β represents the convection heat transfer coefficient of the modeled charging pile, s represents the surface area of ​​the modeled charging pile, λ represents the thermal conductivity of the modeled charging pile, λ={λ v ,λ h}, T 1 represents the hot surface temperature on the modeled charging pile, T 2 represents the cold surface temperature on the modeled charging pile, d represents the thickness of the modeled charging pile in the vertical direction, T 3 represents the surface temperature on the modeled charging pile, T 4 represents the fluid temperature in the modeled charging pile, ε represents the emissivity, σ represents the Stefan-Boltzmann constant, T 5 represents the temperature of any radiating surface of the modeled charging pile under thermal radiation, T 6 Indicates that except T 5 The temperature on any radiating surface other than the corresponding radiating surface.

[0091] S3. Calculate the heat generation numerical model of the modeled charging pile according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, construct the temperature field distribution of the modeled charging pile using the heat generation numerical model, and select the temperature key points of the liquid-cooled super charging pile from the temperature field distribution.

[0092] The embodiment of the present invention calculates the heat generation numerical model of the modeled charging pile according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, so as to simulate the heat generation process of the modeled charging pile.

[0093] In one embodiment of the present invention, the heat generation numerical model of the modeled charging pile is calculated according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, including: according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, the heat generation numerical model of the modeled charging pile is calculated using the following formula:

[0094]

[0095] in, represents the heat generation numerical model, λ represents the thermal conductivity of the modeled charging pile, λ={λ v ,λ h}, Q production represents the heat generation of the modeled charging pile, Q consumption represents the heat consumption of the modeled charging pile, T represents the temperature independent variable to be solved on the modeled charging pile, t represents the time variable, ρ represents the density on the modeled charging pile, C p represents the specific heat capacity on the modeled charging pile, Represents the second-order differential on the x, y, and z axes of the modeled charging station.

[0096] Optionally, the process of constructing the temperature field distribution of the modeled charging pile using the heat generation numerical model is: after calculating the temperature independent variable T using the heat generation numerical model, the temperature values ​​at different positions on the modeled charging pile can be obtained, thereby obtaining the temperature field distribution.

[0097] Furthermore, the embodiment of the present invention selects the temperature key points of the liquid-cooled super charging pile from the temperature field distribution, so as to select the temperature key points with obvious temperature changes from the temperature field distribution.

[0098] The temperature key point refers to a coordinate position where the temperature changes significantly.

[0099] In one embodiment of the present invention, the selecting the temperature key points of the liquid-cooled super charging pile from the temperature field distribution includes: identifying the x-axis temperature sequence, y-axis temperature sequence, and z-axis temperature sequence of the liquid-cooled super charging pile on the x-axis, y-axis, and z-axis respectively from the temperature field distribution; respectively calculating the x-axis temperature variance, y-axis temperature variance, and z-axis temperature variance on the x-axis temperature sequence, the y-axis temperature sequence, and the z-axis temperature sequence; based on the x-axis temperature variance, the y-axis temperature variance, and the z-axis temperature variance, selecting the temperature key points of the liquid-cooled super charging pile from the x-axis, the y-axis, and the z-axis.

[0100] Optionally, the process of selecting the temperature key points of the liquid-cooled super charging pile from the x-axis, the y-axis and the z-axis based on the x-axis temperature variance, the y-axis temperature variance and the z-axis temperature variance is as follows: when a temperature variance among the x-axis temperature variance, the y-axis temperature variance and the z-axis temperature variance is greater than a preset variance, it can be determined that the change of this temperature sequence is relatively large and it is not a smooth temperature sequence. Therefore, the position of this temperature sequence on the coordinate axis is used as the temperature key point of the liquid-cooled super charging pile.

[0101] S4. Construct temperature control parameters of the liquid-cooled super charging pile, calculate a heat consumption numerical model of the modeled charging pile under the temperature control parameters, and detect the temperature value of the temperature key point under the heat consumption numerical model.

[0102] In an embodiment of the present invention, the temperature control parameters include a density parameter of the coolant, a velocity parameter of the coolant flow, a dynamic viscosity coefficient of the coolant, an instantaneous pressure parameter of the coolant, a thermal conductivity parameter of the coolant, and a specific heat capacity parameter of the coolant. Each parameter has multiple different values ​​in order to subsequently calculate the heat dissipation capacity of the coolant under each value.

[0103] Furthermore, the embodiment of the present invention calculates a numerical model of heat consumption of the modeled charging pile under the temperature control parameters to analyze the heat dissipation capacity of the coolant in the modeled charging pile.

[0104] In one embodiment of the present invention, the step of calculating the heat consumption numerical model of the modeled charging pile under the temperature control parameters includes: calculating the mass conservation model of the modeled charging pile under the temperature control parameters using the following formula:

[0105]

[0106] in, represents the mass conservation model, ρ′ represents the density of the coolant in the liquid-cooled super charging pile, t represents time, u represents the speed of the coolant on the x-axis, v represents the speed of the coolant on the y-axis, and w represents the speed of the coolant on the z-axis;

[0107] The momentum conservation model of the modeled charging pile under the temperature control parameters is calculated using the following formula:

[0108]

[0109] in,

[0110] represents the momentum conservation model on the x-axis, y-axis and z-axis respectively, ρ′ represents the density of the coolant in the liquid-cooled super charging pile, t represents time, u represents the speed of the coolant on the x-axis, v represents the speed of the coolant on the y-axis, w represents the speed of the coolant on the z-axis, μ represents the dynamic viscosity coefficient of the coolant, and p represents the instantaneous pressure of the coolant;

[0111] The energy conservation model of the modeled charging pile under the temperature control parameters is calculated using the following formula:

[0112]

[0113] Wherein, ρ′ represents the density of the coolant in the liquid-cooled super charging pile, t represents time, u represents the speed of the coolant on the x-axis, v represents the speed of the coolant on the y-axis, w represents the speed of the coolant on the z-axis, T′ represents the instantaneous temperature of the liquid-cooled charging pile under the influence of the coolant, λ′ represents the thermal conductivity of the coolant, C′ p Represents the specific heat capacity of the coolant, S T′ represents the contact area between the coolant and the liquid-cooled charging pile corresponding to T′;

[0114] The mass conservation model, the momentum conservation model and the energy conservation model are used as the heat consumption numerical model of the modeled charging pile.

[0115] Among them, the mass conservation model refers to a mathematical model in which the mass of the fluid does not change during the movement within unit time, the momentum conservation model refers to a mathematical model in which the momentum of the fluid does not change during the movement within unit time, and the energy conservation model refers to a mathematical model in which the energy of the fluid does not change during the movement within unit time.

[0116] It should be noted that the above T′ represents the instantaneous temperature of the liquid-cooled charging pile under the influence of the coolant, and T′ is an unknown variable that needs to be calculated.

[0117] Optionally, the process of detecting the temperature value of the temperature critical point under the heat consumption numerical model refers to the process of detecting the temperature field distribution of the liquid-cooled charging pile under the heat consumption numerical model, and then determining the temperature value of the temperature critical point from the temperature field distribution. In this process, the temperature change of the coolant is constrained by the conservation model in the heat consumption numerical model. The temperature field distribution of the coolant can be measured first. Since the coolant is in contact with the temperature field distribution corresponding to the heat generation numerical model, the temperature field distribution corresponding to the heat generation numerical model can be replaced by the temperature field distribution of the coolant. Therefore, the temperature value of the temperature critical point can be determined from the temperature field distribution of the coolant.

[0118] S5. Construct a curve graph between the temperature control parameter and the temperature value, use the curve graph to determine the final temperature control parameter of the liquid-cooled super charging pile, and obtain the current temperature control parameter of the liquid-cooled super charging pile. After converting the current temperature control parameter into the final temperature control parameter, complete the temperature control of the liquid-cooled super charging pile and obtain the temperature control result of the liquid-cooled super charging pile.

[0119] In the embodiment of the present invention, the curve graph refers to a curve graph that feeds back the correlation between the temperature control parameter and the temperature value.

[0120] Exemplarily, the process of determining the final temperature control parameters of the liquid-cooled super charging pile using the curve graph refers to: which temperature control parameters have lower temperature values ​​that can be observed in the curve graph, and then using these temperature control parameters as the final temperature control parameters.

[0121] In one embodiment of the present invention, converting the current temperature control parameter into the final temperature control parameter comprises: inputting the current temperature control parameter into a preset PID controller; and in the PID controller, calculating an intermediate temperature control parameter before the current temperature control parameter is converted into the final temperature control parameter using the following formula:

[0122]

[0123] Wherein, u(t) represents the intermediate temperature control parameter, K p represents the proportional gain, T t represents the integration time constant, T D represents the differential time constant, e(t) represents the difference between the current temperature control parameter and the final temperature control parameter, and t represents the time variable;

[0124] The current temperature control parameter is converted into the final temperature control parameter using the intermediate temperature control parameter.

[0125] Optionally, the process of converting the current temperature control parameter into the final temperature control parameter using the intermediate temperature control parameter means: since the value output by the PID controller gradually approaches the value of the final temperature control parameter in a step-by-step manner, when the PID controller outputs the intermediate temperature control parameter and continues to use the intermediate temperature control parameter as input data of the PID controller, when the output result is obtained, if the output result obtained is consistent with the final temperature control parameter, the process of converting the current temperature control parameter into the final temperature control parameter is completed.

[0126] It can be seen that the embodiment of the present invention uses the geometric numerical values ​​to perform three-dimensional modeling on the liquid-cooled super charging pile to simulate the heat distribution of the liquid-cooled super charging pile and the heat dissipation capacity of the coolant on the modeled charging pile. The embodiment of the present invention collects the heat generation parameters in the fluid flow area to perform a large number of heat generation tests on the fluid flow area, and records the heat generation parameters of the fluid flow area, so as to subsequently use the heat generation parameters to simulate the heat generation process of the modeled charging pile. The embodiment of the present invention calculates the heat generation numerical model of the modeled charging pile according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption to simulate the heat generation process of the modeled charging pile. Further, the embodiment of the present invention selects the temperature key points of the liquid-cooled super charging pile from the temperature field distribution to select the temperature key points with obvious temperature changes from the temperature field distribution. Further, the embodiment of the present invention calculates the heat consumption numerical model of the modeled charging pile under the temperature control parameters to analyze the heat dissipation capacity of the coolant in the modeled charging pile. Therefore, the temperature control method and system based on liquid-cooled supercharging and high-power charging proposed in the embodiments of the present invention can analyze the temperature control capabilities of different cooling parameters at the temperature collection point of the liquid-cooled charging pile.

[0127] like Figure 2 Shown is a functional module diagram of the temperature control system based on liquid-cooled supercharging and high-power charging of the present invention.

[0128] The temperature control system 200 based on liquid-cooled supercharge and high-power charging of the present invention can be installed in an electronic device. According to the functions implemented, the temperature control system based on liquid-cooled supercharge and high-power charging may include an area determination module 201, a heat calculation module 202, a key point selection module 203, a temperature detection module 204 and a temperature control module 205. The module described in the present invention can also be referred to as a unit, which refers to a series of computer program segments that can be executed by an electronic device processor and can complete fixed functions, which are stored in the memory of the electronic device.

[0129] In the embodiment of the present invention, the functions of each module / unit are as follows:

[0130] The area determination module 201 is used to measure the geometric values ​​of the liquid-cooled super charging pile, use the geometric values ​​to perform three-dimensional modeling on the liquid-cooled super charging pile to obtain a modeled charging pile, and determine the fluid flow area in the modeled charging pile;

[0131] The heat calculation module 202 is used to collect heat generation parameters in the fluid flow area, calculate the thermal conductivity of the modeled charging pile using the heat generation parameters, calculate the average specific heat capacity of the modeled charging pile using the heat generation parameters, and calculate the heat generation and heat consumption of the modeled charging pile using the heat generation parameters;

[0132] The key point selection module 203 is used to calculate the heat generation numerical model of the modeled charging pile according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, construct the temperature field distribution of the modeled charging pile using the heat generation numerical model, and select the temperature key points of the liquid-cooled super charging pile from the temperature field distribution;

[0133] The temperature detection module 204 is used to construct the temperature control parameters of the liquid-cooled super charging pile, calculate the heat consumption numerical model of the modeled charging pile under the temperature control parameters, and detect the temperature value of the temperature key point under the heat consumption numerical model;

[0134] The temperature control module 205 is used to construct a curve graph between the temperature control parameters and the temperature values, use the curve graph to determine the final temperature control parameters of the liquid-cooled super charging pile, and obtain the current temperature control parameters of the liquid-cooled super charging pile. After converting the current temperature control parameters into the final temperature control parameters, the temperature control of the liquid-cooled super charging pile is completed to obtain the temperature control result of the liquid-cooled super charging pile.

[0135] In detail, each module in the temperature control system 200 based on liquid-cooled supercharging high-power charging in the embodiment of the present invention is used in the same manner as described above. Figure 1 The temperature control method based on liquid-cooled supercharging and high-power charging is the same technical means and can produce the same technical effects, so I will not go into details here.

[0136] In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0137] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0138] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, so it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any attached figure mark in the claims should not be regarded as limiting the claims involved.

[0139] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0140] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A temperature control method based on liquid-cooled supercharging and high-power charging, characterized in that: The method comprises: Measuring geometric values ​​of a liquid-cooled super charging pile, using the geometric values ​​to perform three-dimensional modeling on the liquid-cooled super charging pile to obtain a modeled charging pile, and determining a fluid flow area in the modeled charging pile; Collecting heat generation parameters in the fluid flow area, calculating the thermal conductivity of the modeled charging pile using the heat generation parameters, calculating the average specific heat capacity of the modeled charging pile using the heat generation parameters, and calculating the heat generation and heat consumption of the modeled charging pile using the heat generation parameters; Calculate the heat generation numerical model of the modeled charging pile according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, construct the temperature field distribution of the modeled charging pile using the heat generation numerical model, and select the temperature key point of the liquid-cooled super charging pile from the temperature field distribution; Constructing temperature control parameters of the liquid-cooled super charging pile, calculating a heat consumption numerical model of the modeled charging pile under the temperature control parameters, and detecting the temperature value of the temperature key point under the heat consumption numerical model; Constructing a curve graph between the temperature control parameter and the temperature value, using the curve graph to determine the final temperature control parameter of the liquid-cooled super charging pile, and obtaining the current temperature control parameter of the liquid-cooled super charging pile, converting the current temperature control parameter into the final temperature control parameter, completing the temperature control of the liquid-cooled super charging pile, and obtaining the temperature control result of the liquid-cooled super charging pile; The step of selecting the key temperature point of the liquid-cooled super charging pile from the temperature field distribution includes: Identify, from the temperature field distribution, an x-axis temperature sequence, a y-axis temperature sequence, and a z-axis temperature sequence of the liquid-cooled super charging pile on the x-axis, the y-axis, and the z-axis, respectively; Calculate the x-axis temperature variance, y-axis temperature variance, and z-axis temperature variance on the x-axis temperature sequence, the y-axis temperature sequence, and the z-axis temperature sequence respectively; Based on the x-axis temperature variance, the y-axis temperature variance, and the z-axis temperature variance, selecting a temperature key point of the liquid-cooled super charging pile from the x-axis, the y-axis, and the z-axis; The process of selecting the temperature key point of the liquid-cooled super charging pile from the x-axis, the y-axis, and the z-axis based on the x-axis temperature variance, the y-axis temperature variance, and the z-axis temperature variance is as follows: when a temperature variance among the x-axis temperature variance, the y-axis temperature variance, and the z-axis temperature variance is greater than a preset variance, it is determined that the change of this temperature sequence is relatively large and is not a stable temperature sequence, and the position of this temperature sequence on the coordinate axis is used as the temperature key point of the liquid-cooled super charging pile; The process of detecting the temperature value of the key temperature point under the heat consumption numerical model refers to the process of detecting the temperature field distribution of the liquid-cooled super charging pile under the heat consumption numerical model, and then determining the temperature value of the key temperature point from the temperature field distribution; The process of using the curve graph to determine the final temperature control parameters of the liquid-cooled super charging pile refers to: observing which temperature control parameters have lower temperature values ​​in the curve graph, and using these temperature control parameters as the final temperature control parameters.

2. The method according to claim 1, characterized in that The collecting of heat generation parameters in the fluid flow area includes: Obtaining the thickness, half-heating time, heat flow distance, specific heat capacity and density of the modeled charging pile in the fluid flow area; Obtaining the surface area, temperature parameter, current parameter and resistance parameter of the modeled charging pile in the fluid flow region; The thickness, the half-heating time, the heat flow distance, the specific heat capacity, the density, the surface area, the temperature parameter, the current parameter and the resistance parameter are used as heat generation parameters in the fluid flow area.

3. The method according to claim 1, characterized in that The calculating the thermal conductivity of the modeled charging pile by using the heat generation parameter includes: Obtaining the thickness, half-heating time, heat flow distance, specific heat capacity and density of the modeled charging pile from the heat generation parameters; According to the thickness and the half-heating time, a formula is used to calculate the vertical thermal diffusion coefficient of the modeled charging pile; The thermal conductivity in the vertical direction and the thermal conductivity in the horizontal direction are used as the thermal conductivity of the modeled charging pile.

4. The method according to claim 1, characterized in that: The calculating the average specific heat capacity of the modeled charging pile by using the heat generation parameter includes: Obtaining the specific heat capacity of the modeled charging pile from the heat generation parameter; According to the specific heat capacity, the average specific heat capacity of the modeled charging pile is calculated using a formula.

5. The method according to claim 1, characterized in that The step of calculating the heat generation and heat consumption of the modeled charging pile by using the heat generation parameter includes: Obtaining the surface area, thickness, temperature parameter, current parameter and resistance parameter of the modeled charging pile from the heat generation parameter; Calculate the heat generated by the modeled charging pile using a formula according to the current parameter and the resistance parameter; The heat consumption of the modeled charging pile is calculated using a formula according to the surface area, the thickness and the temperature parameter.

6. The method according to claim 1, characterized in that The calculating the heat generation numerical model of the modeled charging pile according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption includes: According to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, a heat generation numerical model of the modeled charging pile is calculated using a formula.

7. The method according to claim 1, characterized in that The calculating of the heat consumption numerical model of the modeled charging pile under the temperature control parameters includes: Calculate the mass conservation model of the modeled charging pile under the temperature control parameters using a formula; Calculate the momentum conservation model of the modeled charging pile under the temperature control parameters using a formula; Calculate the energy conservation model of the modeled charging pile under the temperature control parameters using a formula; The mass conservation model, the momentum conservation model and the energy conservation model are used as the heat consumption numerical model of the modeled charging pile.

8. The method according to claim 1, characterized in that The converting the current temperature control parameter into the final temperature control parameter comprises: Inputting the current temperature control parameters into a preset PID controller; In the PID controller, an intermediate temperature control parameter before the current temperature control parameter is converted into the final temperature control parameter is calculated using a formula; The current temperature control parameter is converted into the final temperature control parameter using the intermediate temperature control parameter.

9. A temperature control system based on liquid-cooled supercharge and high-power charging, the system implements the method as claimed in claim 1, characterized in that: The system comprises: an area determination module, configured to measure geometric values ​​of a liquid-cooled super charging pile, perform three-dimensional modeling of the liquid-cooled super charging pile using the geometric values ​​to obtain a modeled charging pile, and determine a fluid flow area in the modeled charging pile; A heat calculation module, used to collect heat generation parameters in the fluid flow area, calculate the thermal conductivity of the modeled charging pile using the heat generation parameters, calculate the average specific heat capacity of the modeled charging pile using the heat generation parameters, and calculate the heat generation and heat consumption of the modeled charging pile using the heat generation parameters; A key point selection module, used to calculate the heat generation numerical model of the modeled charging pile according to the thermal conductivity, the average specific heat capacity, the heat generation and the heat consumption, construct the temperature field distribution of the modeled charging pile using the heat generation numerical model, and select the temperature key points of the liquid-cooled super charging pile from the temperature field distribution; A temperature detection module, used to construct the temperature control parameters of the liquid-cooled super charging pile, calculate the heat consumption numerical model of the modeled charging pile under the temperature control parameters, and detect the temperature value of the temperature key point under the heat consumption numerical model; A temperature control module is used to construct a curve graph between the temperature control parameters and the temperature values, use the curve graph to determine the final temperature control parameters of the liquid-cooled super charging pile, and obtain the current temperature control parameters of the liquid-cooled super charging pile. After converting the current temperature control parameters into the final temperature control parameters, the temperature control of the liquid-cooled super charging pile is completed to obtain the temperature control result of the liquid-cooled super charging pile.

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