Battery cell structural member liquid cooling and heating intelligent regulation and control method, system and medium

Abstract

The invention discloses a liquid cooling and heating intelligent regulation and control method and system for a battery cell structural member and a medium. The method comprises the following steps: acquiring monitored temperature data of the battery cell structural member; environment parameters of the environment where the vehicle is located and vehicle function setting parameters are obtained; intelligent regulation and control are carried out based on the temperature data, and the intelligent regulation and control comprise graded regulation and control, regional regulation and control and flow rate regulation and control; and in the regulation and control process, regulation and control intelligent correction is carried out based on the environment parameters and / or the vehicle function setting parameters. According to the invention, a plurality of liquid cooling / heat regulation and control mechanisms are set, the vehicle power consumption can be distributed more reasonably by refining the types of application scenes, and the temperature can be lowered or raised in a targeted manner by grading the temperature; and meanwhile, the problems that the passage circulation efficiency of the cooling liquid is low and fixed-point regulation and control are not achieved can be better solved by setting different areas and flow rates.

Description

Technical Field

[0001] The present invention relates to the field of battery management technology, and more specifically, to a method, system and medium for intelligently controlling liquid cooling and heating of battery cell structural parts. Background Art

[0002] Temperature control of battery cell structural components is crucial to the performance, life and safety of the battery. An increase or decrease in temperature may lead to a decrease in battery efficiency or even safety accidents such as thermal runaway.

[0003] At present, when using vehicle-mounted battery coolant for temperature control, the temperature is adjusted through pre-set pipelines. In actual application, it lacks intelligence and cannot adjust the temperature at a fixed point. At the same time, the flow rate of the coolant is also a key parameter affecting the performance of the battery temperature control system. The current setting of the coolant flow rate is single and fixed, and there is also a lack of detailed control under scene classification, which can easily lead to problems such as low liquid cooling efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a method, system and medium for intelligent liquid cooling and heat control of battery cell structural parts, which sets up a variety of liquid cooling / heat control mechanisms. By refining the types of application scenarios, the vehicle's electricity consumption can be allocated more reasonably, and the temperature can be reduced or increased in a targeted manner by grading the temperature. At the same time, setting different areas and flow rates can better solve the problems of low circulation efficiency of the coolant path and lack of fixed-point control.

[0005] A first aspect of the present invention provides a method for intelligently controlling liquid cooling and heating of a battery cell structure, comprising the following steps: Obtain the temperature data of the monitored battery cell structural components; Obtaining environmental parameters of the vehicle's environment and vehicle function setting parameters; Performing intelligent regulation based on the temperature data, wherein the intelligent regulation includes hierarchical regulation, regional regulation and flow rate regulation; During the control process, intelligent control correction is performed based on the environmental parameters and / or the vehicle function setting parameters.

[0006] In this solution, the acquisition of the monitored temperature data of the battery cell structure specifically includes: Establishing a communication response with a temperature sensor group disposed on the battery pack, wherein: A corresponding pipeline temperature sensor is provided in the liquid cooling pipeline, and the temperature in the pipeline is obtained based on the pipeline temperature sensor; The battery cell structure is provided with a corresponding patch temperature sensor, and the battery pack temperature is obtained based on the patch temperature sensor; The temperature data is obtained based on the temperature in the pipeline and the temperature of the battery pack.

[0007] In this solution, the acquisition of environmental parameters of the vehicle environment and vehicle function setting parameters specifically includes: The environmental parameters include at least the ambient temperature and the ambient humidity, and the vehicle function setting parameters include the vehicle driving mode and the charging response; Acquiring the ambient temperature based on a temperature sensor disposed on the vehicle body; Acquiring the ambient humidity based on a humidity sensor disposed on the vehicle body; The vehicle driving mode and the charging response of the current vehicle are obtained based on the vehicle-mounted terminal.

[0008] In this plan, the hierarchical regulation includes: When no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a first range, starting a first liquid cooling / heating regulation based on the ambient temperature and the ambient humidity, wherein a first temperature of the coolant is obtained based on the ambient temperature and the ambient humidity combined with corresponding weight calculations, and the first liquid cooling / heating regulation is started based on the first temperature of the coolant; When no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a second range, a second liquid cooling / heating regulation is initiated based on a vehicle driving mode, wherein the vehicle driving mode includes ordinary driving and characteristic driving, and when the characteristic driving is identified, a second coolant temperature is obtained by adaptively updating the first coolant temperature, and the second liquid cooling / heating regulation is initiated based on the second coolant temperature; When a charging response is identified, the first coolant temperature and the second coolant temperature are combined to perform graded control, wherein a graded calculation is performed based on different temperature differences to obtain a third coolant temperature during the charging response.

[0009] In this plan, when regulating by region, it specifically includes: When no charging response is identified, liquid cooling / heat regulation is performed based on the preset primary pipeline path, including opening the secondary pipeline valve at the position of the structural component corresponding to the characteristic temperature based on the battery pack temperature; When a charging response is identified, all secondary pipeline valves are opened to open the secondary pipeline passage for liquid cooling / heat regulation.

[0010] In this scheme, when the flow rate is controlled, it specifically includes: Adjusting the flow rate based on different coolant temperatures under graded control, wherein the flow rates of the coolant at the first temperature and the coolant at the second temperature are set to the first flow rate, and the flow rate of the coolant at the third temperature is set to the second flow rate; Different flow rates are matched based on different pipeline mechanisms under regional control, wherein the third flow rate is matched when all secondary pipeline valves are not opened, and the fourth flow rate is matched when all secondary pipeline valves are opened.

[0011] The second aspect of the present invention further provides a battery cell structural component liquid cooling and heat intelligent control system, comprising a memory and a processor, wherein the memory comprises a battery cell structural component liquid cooling and heat intelligent control method program, and when the battery cell structural component liquid cooling and heat intelligent control method program is executed by the processor, the following steps are implemented: Obtain the temperature data of the monitored battery cell structural components; Obtaining environmental parameters of the vehicle's environment and vehicle function setting parameters; Performing intelligent regulation based on the temperature data, wherein the intelligent regulation includes hierarchical regulation, regional regulation and flow rate regulation; During the control process, intelligent control correction is performed based on the environmental parameters and / or the vehicle function setting parameters.

[0012] In this solution, the acquisition of the monitored temperature data of the battery cell structure specifically includes: Establishing a communication response with a temperature sensor group disposed on the battery pack, wherein: A corresponding pipeline temperature sensor is provided in the liquid cooling pipeline, and the temperature in the pipeline is obtained based on the pipeline temperature sensor; The battery cell structure is provided with a corresponding patch temperature sensor, and the battery pack temperature is obtained based on the patch temperature sensor; The temperature data is obtained based on the temperature in the pipeline and the temperature of the battery pack.

[0013] In this solution, the acquisition of environmental parameters of the vehicle environment and vehicle function setting parameters specifically includes: The environmental parameters include at least the ambient temperature and the ambient humidity, and the vehicle function setting parameters include the vehicle driving mode and the charging response; Acquiring the ambient temperature based on a temperature sensor disposed on the vehicle body; Acquiring the ambient humidity based on a humidity sensor disposed on the vehicle body; The vehicle driving mode and the charging response of the current vehicle are obtained based on the vehicle-mounted terminal.

[0014] In this plan, the hierarchical regulation includes: When no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a first range, starting a first liquid cooling / heating regulation based on the ambient temperature and the ambient humidity, wherein a first temperature of the coolant is obtained based on the ambient temperature and the ambient humidity combined with corresponding weight calculations, and the first liquid cooling / heating regulation is started based on the first temperature of the coolant; When no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a second range, a second liquid cooling / heating regulation is initiated based on a vehicle driving mode, wherein the vehicle driving mode includes ordinary driving and characteristic driving, and when the characteristic driving is identified, a second coolant temperature is obtained by adaptively updating the first coolant temperature, and the second liquid cooling / heating regulation is initiated based on the second coolant temperature; When a charging response is identified, the first coolant temperature and the second coolant temperature are combined to perform graded control, wherein a graded calculation is performed based on different temperature differences to obtain a third coolant temperature during the charging response.

[0015] In this plan, when regulating by region, it specifically includes: When no charging response is identified, liquid cooling / heat regulation is performed based on the preset primary pipeline path, including opening the secondary pipeline valve at the position of the structural component corresponding to the characteristic temperature based on the battery pack temperature; When a charging response is identified, all secondary pipeline valves are opened to open the secondary pipeline passage for liquid cooling / heat regulation.

[0016] In this scheme, when the flow rate is controlled, it specifically includes: Adjusting the flow rate based on different coolant temperatures under graded control, wherein the flow rates of the coolant at the first temperature and the coolant at the second temperature are set to the first flow rate, and the flow rate of the coolant at the third temperature is set to the second flow rate; Different flow rates are matched based on different pipeline mechanisms under regional control, wherein the third flow rate is matched when all secondary pipeline valves are not opened, and the fourth flow rate is matched when all secondary pipeline valves are opened.

[0017] A third aspect of the present invention provides a computer-readable storage medium, which includes a machine's method program for intelligently controlling liquid cooling and heat of a battery cell structural component. When the method program for intelligently controlling liquid cooling and heat of a battery cell structural component is executed by a processor, the steps of a method for intelligently controlling liquid cooling and heat of a battery cell structural component as described in any one of the above items are implemented.

[0018] The present invention discloses a method, system and medium for intelligent liquid cooling and heat control of battery cell structural parts, which are equipped with a variety of liquid cooling / heat control mechanisms. By refining the types of application scenarios, the vehicle's electricity consumption can be allocated more reasonably, and the temperature can be reduced or increased in a targeted manner by grading the temperature. At the same time, setting different areas and flow rates can better solve the problems of low circulation efficiency of the coolant path and lack of fixed-point control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A flow chart showing a method for intelligently controlling liquid cooling and heating of a battery cell structure of the present invention is shown; Figure 2 A schematic diagram showing the pipeline arrangement of a method for intelligently controlling liquid cooling and heating of a battery cell structure of the present invention is shown; Figure 3 A block diagram of a battery cell structural component liquid cooling and heat intelligent control system of the present invention is shown. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0022] Figure 1 A flow chart of a method for intelligently controlling liquid cooling and heat of a battery cell structural component of the present application is shown.

[0023] like Figure 1 As shown, the present application discloses a method for intelligently controlling liquid cooling and heat of a battery cell structure, comprising the following steps: S102, obtaining the monitored temperature data of the battery cell structural components; S104, obtaining environmental parameters of the vehicle's environment and vehicle function setting parameters; S106, performing intelligent regulation based on the temperature data, wherein the intelligent regulation includes hierarchical regulation, regional regulation and flow rate regulation; S108, during the control process, intelligent control correction is performed based on the environmental parameters and / or the vehicle function setting parameters.

[0024] It should be noted that in this embodiment, when the temperature of the battery cell structural parts is intelligently controlled, the temperature data must be obtained first, so that adjustments can be made based on the temperature data. However, adjustments cannot be made based only on a single temperature data. Intelligent corrections must also be made based on the vehicle's environment and the functions currently set for the vehicle, so as to better adjust the temperature of the battery cell structural parts.

[0025] Specifically, first, the temperature data of the monitored battery cell structural parts is obtained, wherein the battery cell structural parts are encapsulated in the battery pack, and corresponding coolant circulation pipelines are provided at different positions. At the same time, the environmental parameters of the vehicle's environment and the vehicle function setting parameters are obtained to facilitate the subsequent scene classification and refinement of temperature adjustment. In this embodiment, three control methods are specifically described, including hierarchical control, regional control and flow rate control. The specific control steps will be described in detail in the subsequent instructions.

[0026] According to an embodiment of the present invention, the step of acquiring the monitored temperature data of the battery cell structure specifically includes: Establishing a communication response with a temperature sensor group disposed on the battery pack, wherein: A corresponding pipeline temperature sensor is provided in the liquid cooling pipeline, and the temperature in the pipeline is obtained based on the pipeline temperature sensor; The battery cell structure is provided with a corresponding patch temperature sensor, and the battery pack temperature is obtained based on the patch temperature sensor; The temperature data is obtained based on the temperature in the pipeline and the temperature of the battery pack.

[0027] It should be noted that, in this embodiment, the monitored temperature data specifically includes the temperature inside the pipeline and the battery pack temperature, wherein a communication response with the temperature sensor group arranged on the battery pack is established, specifically, a corresponding pipeline temperature sensor is provided in the liquid cooling pipeline, and the temperature inside the pipeline is obtained based on the pipeline temperature sensor; and a corresponding patch temperature sensor is provided on the battery cell structure, and the battery pack temperature is obtained based on the patch temperature sensor.

[0028] According to an embodiment of the present invention, the obtaining of environmental parameters of the vehicle environment and vehicle function setting parameters specifically includes: The environmental parameters include at least the ambient temperature and the ambient humidity, and the vehicle function setting parameters include the vehicle driving mode and the charging response; Acquiring the ambient temperature based on a temperature sensor disposed on the vehicle body; Acquiring the ambient humidity based on a humidity sensor disposed on the vehicle body; The vehicle driving mode and the charging response of the current vehicle are obtained based on the vehicle-mounted terminal.

[0029] It should be noted that, in this embodiment, the environmental parameters at least include ambient temperature and ambient humidity, and the vehicle function setting parameters in this embodiment take vehicle driving mode and charging response as examples. At present, for charging response, major automobile manufacturers already have preheating function settings, but the temperature and flow rate during preheating are not finely controlled. Single temperature and flow rate control is not only easy to cause power waste, but also causes accelerated battery loss due to uneven temperature of battery cell structural parts. Therefore, detailed control is required, which will be explained in detail in the subsequent instructions.

[0030] Specifically, in this embodiment, the ambient temperature is obtained based on a temperature sensor arranged on the vehicle body, the ambient humidity is obtained based on a humidity sensor arranged on the vehicle body, and the vehicle driving mode and the charging response of the current vehicle are obtained based on the vehicle-mounted terminal.

[0031] According to an embodiment of the present invention, hierarchical regulation specifically includes: When no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a first range, starting a first liquid cooling / heating regulation based on the ambient temperature and the ambient humidity, wherein a first temperature of the coolant is obtained based on the ambient temperature and the ambient humidity combined with corresponding weight calculations, and the first liquid cooling / heating regulation is started based on the first temperature of the coolant; When no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a second range, a second liquid cooling / heating regulation is initiated based on a vehicle driving mode, wherein the vehicle driving mode includes ordinary driving and characteristic driving, and when the characteristic driving is identified, a second coolant temperature is obtained by adaptively updating the first coolant temperature, and the second liquid cooling / heating regulation is initiated based on the second coolant temperature; When a charging response is identified, the first coolant temperature and the second coolant temperature are combined to perform graded control, wherein a graded calculation is performed based on different temperature differences to obtain a third coolant temperature during the charging response.

[0032] It should be noted that in this embodiment, the charging temperature range is generally between 0°C and 45°C. When the temperature exceeds 45°C, the electrolyte inside the battery may decompose, resulting in thermal runaway of the battery. When the temperature is below 0°C, the charging process may become inefficient and may even cause irreversible damage to the lithium battery. The discharge temperature range is usually between -20°C and 60°C. Low temperature will cause the discharge performance of the battery to drop significantly, and may increase the internal resistance of the battery, thereby affecting the energy release efficiency of the battery. Excessive temperature will cause the battery temperature to be too high, affecting the battery life and even causing safety risks. Therefore, the optimal operating temperature of the battery pack corresponding to the battery cell structure is between 20°C and 30°C. This temperature range can maximize the charging efficiency and discharge performance of the battery while extending the battery life.

[0033] Specifically, taking the working temperature between 20°C and 30°C as an example, when no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a first range, wherein the first range is "0°C-8°C", the first liquid cooling / heating regulation is started based on the ambient temperature and ambient humidity, wherein the first temperature of the coolant is obtained based on the ambient temperature and the ambient humidity combined with the corresponding weight calculation, wherein the weight of the ambient temperature is greater than the weight of the ambient humidity, and the specific different weights can be dynamically updated, and the first liquid cooling / heating regulation is started based on the first temperature of the coolant. Specifically, taking the current ambient temperature of 40°C and the ambient humidity of 50% as an example, the first temperature of the coolant is calculated to be 25°C through the ambient temperature weight α and the ambient humidity β, wherein α is 0.5 and β is 10. If the current battery pack temperature is 30°C, liquid cooling regulation is performed based on the first temperature of the coolant, and when the battery pack temperature is 22°C, liquid heating regulation is performed based on the first temperature of the coolant.

[0034] Further, when no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a second range, wherein the second range is "8°C-15°C", the second liquid cooling / heating regulation is started based on the vehicle driving mode, wherein the vehicle driving mode includes ordinary driving and characteristic driving, and when the characteristic driving is identified, the characteristic driving is, for example, a high-power sports mode, at this time, the first temperature of the coolant is adaptively updated to obtain the second temperature of the coolant, and the second liquid cooling / heating regulation is started based on the second temperature of the coolant. Specifically, when the vehicle is driving, the temperature difference between the battery pack temperature and the temperature in the pipeline is in the range of 8°C-15°C, thereby the first range is transitioned to the second range. The second range is therefore required to be adaptively updated based on the first coolant temperature to obtain the second coolant temperature. In the high-power sports mode, the discharge efficiency of the battery is improved, so the battery pack temperature will rise rapidly. At this time, the second coolant temperature needs to be adaptively adjusted based on the corresponding increase ratio. Specifically, in the normal driving mode, the battery pack temperature is 30°C. In the first high-power driving sports mode, the battery pack temperature rises rapidly to 39°C. At this time, the increase ratio is 30%. Correspondingly, it is necessary to round the power ratio (0.09) based on the premise that the first coolant temperature is 25°C and the 30% decrease is combined. The obtained second coolant temperature is 22°C; When a charging response is identified, the first temperature of the coolant and the second temperature of the coolant are combined for graded regulation, wherein a graded calculation is performed based on different temperature differences to obtain a third temperature of the coolant during a charging response. Specifically, the ideal charging temperature of a lithium-ion battery is between 0°C and 45°C, so the third temperature of the coolant needs to be controlled based on the actual temperature of the battery pack, and the actual temperature of the battery pack is affected by the first temperature of the coolant and the second temperature of the coolant before the charging response is identified. Therefore, it is necessary to combine the first temperature of the coolant and the second temperature of the coolant for graded regulation. Specifically, assuming that the ideal charging temperature of the battery pack is 36°C, since the first temperature of the coolant is 25°C, and the second temperature of the coolant is lower at 22°C, the first temperature of the coolant is 25°C as the classification point, and the target difference between the battery pack temperature and the first temperature of the coolant is calculated. Based on the target difference and the preset cooling efficiency value, the current third temperature value of the coolant is calculated, wherein the battery pack temperature is 30°C, the efficiency value is 0.8, and the third temperature value of the coolant is 32°C. The battery pack is heated by the coolant of the third temperature value, so as to better prepare for preheating of the battery charging response.

[0035] According to an embodiment of the present invention, when performing regional control, it specifically includes: When no charging response is identified, liquid cooling / heat regulation is performed based on the preset primary pipeline path, including opening the secondary pipeline valve at the position of the structural component corresponding to the characteristic temperature based on the battery pack temperature; When a charging response is identified, all secondary pipeline valves are opened to open the secondary pipeline passage for liquid cooling / heat regulation.

[0036] It should be noted that in this embodiment, the liquid cooling pipeline in the traditional battery pack is a single circuit, which does not have valve control and is therefore not adjustable. In this embodiment, a secondary pipeline and a corresponding pipeline valve are set on the original primary pipeline. Figure 2 When no charging response is identified, liquid cooling / heat regulation is performed based on the preset primary pipeline path, including opening the secondary pipeline valve at the structural component position corresponding to the characteristic temperature based on the battery pack temperature, wherein the setting of the secondary pipeline has been set, and different pipeline settings are arranged for different battery cell structural component areas. The characteristic temperature indicates that there are differences in the temperatures of different areas of the battery pack. For example, the temperature of area A is significantly higher than that of other positions. At this time, it is necessary to open the diode valve at the corresponding position of area A to further remove the heat of the battery for liquid cooling; and when a charging response is identified, it is necessary to open all the secondary pipeline valves to conduct the secondary pipeline path for liquid cooling / heat regulation, so as to quickly heat up or cool down the battery in an all-round way, so that the battery temperature reaches the ideal charging state with the shortest response time.

[0037] According to an embodiment of the present invention, when the flow rate is controlled, it specifically includes: Adjusting the flow rate based on different coolant temperatures under graded control, wherein the flow rates of the coolant at the first temperature and the coolant at the second temperature are set to the first flow rate, and the flow rate of the coolant at the third temperature is set to the second flow rate; Different flow rates are matched based on different pipeline mechanisms under regional control, wherein the third flow rate is matched when all secondary pipeline valves are not opened, and the fourth flow rate is matched when all secondary pipeline valves are opened.

[0038] It should be noted that, in this embodiment, the flow rate of the coolant is usually set in the range of "1-5m / s". In this embodiment, four flow rates are set to cope with flow rate control in different application scenarios, including setting a first flow rate, a second flow rate, a third flow rate and a fourth flow rate, wherein the first flow rate is "2-4m / s", the second flow rate is "1-2m / s", the third flow rate is related to the first flow rate and the open diode path, and the specific needs are determined according to actual conditions. The fourth flow rate is positively correlated with the second flow rate. Specifically, the flow rate of the vehicle battery coolant is usually designed to be between "1-5m / s". A reasonable flow rate can ensure that the heat of the battery is effectively dissipated during charging and discharging, and keep the battery in a suitable operating temperature range, thereby optimizing battery performance, extending service life and ensuring safety. Since the third temperature of the coolant has different temperature settings, and the pipelines corresponding to the second flow rate and the fourth flow rate are all in the case where the diode path valve is fully open, therefore, in order to fully perform heat exchange, the second flow rate is set at "1-2m / s" and the fourth flow rate is set to be no higher than "2m / s".

[0039] Furthermore, the first flow rate is set to "2-4m / s" in order to quickly perform heat exchange, which can ensure that the coolant can effectively take away heat from the battery cell or battery pack and reduce the occurrence of local overheating of the battery. Accordingly, since the first flow rate is a range value, the driving mode corresponding to the second temperature of the coolant is the high power mode. Therefore, the first flow rate corresponding to the second temperature of the coolant is faster than the first flow rate corresponding to the first temperature of the coolant; further, in actual operation, since local overheating still exists, the third flow rate needs to be adjusted on the premise of opening some valves. Since the purpose of opening the valve at this time is to prevent local overheating of the battery, not for charging response, the actual flow rate of the third flow rate is gradually reduced on the basis of the first flow rate as the number of secondary pipeline valves opened is increased, so that the locally overheated battery cell structural parts can quickly and fully contact with the coolant, and the actual deceleration rate is positively correlated with the number of valves opened in the secondary pipeline, that is, the more valves are opened, the greater the deceleration.

[0040] Figure 3 A block diagram of a battery cell structural component liquid cooling and heat intelligent control system of the present invention is shown.

[0041] like Figure 3 As shown, the present invention discloses a battery cell structure liquid cooling and heat intelligent control system, including a memory and a processor, the memory includes a battery cell structure liquid cooling and heat intelligent control method program, the battery cell structure liquid cooling and heat intelligent control method program is executed by the processor to implement the following steps: Obtain the temperature data of the monitored battery cell structural components; Obtaining environmental parameters of the vehicle's environment and vehicle function setting parameters; Performing intelligent regulation based on the temperature data, wherein the intelligent regulation includes hierarchical regulation, regional regulation and flow rate regulation; During the control process, intelligent control correction is performed based on the environmental parameters and / or the vehicle function setting parameters.

[0042] It should be noted that in this embodiment, when the temperature of the battery cell structural parts is intelligently controlled, the temperature data must be obtained first, so that adjustments can be made based on the temperature data. However, adjustments cannot be made based only on a single temperature data. Intelligent corrections must also be made based on the vehicle's environment and the functions currently set for the vehicle, so as to better adjust the temperature of the battery cell structural parts.

[0043] Specifically, first, the temperature data of the monitored battery cell structural parts is obtained, wherein the battery cell structural parts are encapsulated in the battery pack, and corresponding coolant circulation pipelines are provided at different positions. At the same time, the environmental parameters of the vehicle's environment and the vehicle function setting parameters are obtained to facilitate the subsequent scene classification and refinement of temperature adjustment. In this embodiment, three control methods are specifically described, including hierarchical control, regional control and flow rate control. The specific control steps will be described in detail in the subsequent instructions.

[0044] According to an embodiment of the present invention, the step of acquiring the monitored temperature data of the battery cell structure specifically includes: Establishing a communication response with a temperature sensor group disposed on the battery pack, wherein: A corresponding pipeline temperature sensor is provided in the liquid cooling pipeline, and the temperature in the pipeline is obtained based on the pipeline temperature sensor; The battery cell structure is provided with a corresponding patch temperature sensor, and the battery pack temperature is obtained based on the patch temperature sensor; The temperature data is obtained based on the temperature in the pipeline and the temperature of the battery pack.

[0045] It should be noted that, in this embodiment, the monitored temperature data specifically includes the temperature inside the pipeline and the battery pack temperature, wherein a communication response with the temperature sensor group arranged on the battery pack is established, specifically, a corresponding pipeline temperature sensor is provided in the liquid cooling pipeline, and the temperature inside the pipeline is obtained based on the pipeline temperature sensor; and a corresponding patch temperature sensor is provided on the battery cell structure, and the battery pack temperature is obtained based on the patch temperature sensor.

[0046] According to an embodiment of the present invention, the obtaining of environmental parameters of the vehicle environment and vehicle function setting parameters specifically includes: The environmental parameters include at least the ambient temperature and the ambient humidity, and the vehicle function setting parameters include the vehicle driving mode and the charging response; Acquiring the ambient temperature based on a temperature sensor disposed on the vehicle body; Acquiring the ambient humidity based on a humidity sensor disposed on the vehicle body; The vehicle driving mode and the charging response of the current vehicle are obtained based on the vehicle-mounted terminal.

[0047] It should be noted that, in this embodiment, the environmental parameters at least include ambient temperature and ambient humidity, and the vehicle function setting parameters in this embodiment take vehicle driving mode and charging response as examples. At present, for charging response, major automobile manufacturers already have preheating function settings, but the temperature and flow rate during preheating are not finely controlled. Single temperature and flow rate control is not only easy to cause power waste, but also causes accelerated battery loss due to uneven temperature of battery cell structural parts. Therefore, detailed control is required, which will be explained in detail in the subsequent instructions.

[0048] Specifically, in this embodiment, the ambient temperature is obtained based on a temperature sensor arranged on the vehicle body, the ambient humidity is obtained based on a humidity sensor arranged on the vehicle body, and the vehicle driving mode and the charging response of the current vehicle are obtained based on the vehicle-mounted terminal.

[0049] According to an embodiment of the present invention, hierarchical regulation specifically includes: When no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a first range, starting a first liquid cooling / heating regulation based on the ambient temperature and the ambient humidity, wherein a first temperature of the coolant is obtained based on the ambient temperature and the ambient humidity combined with corresponding weight calculations, and the first liquid cooling / heating regulation is started based on the first temperature of the coolant; When no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a second range, a second liquid cooling / heating regulation is initiated based on a vehicle driving mode, wherein the vehicle driving mode includes ordinary driving and characteristic driving, and when the characteristic driving is identified, a second coolant temperature is obtained by adaptively updating the first coolant temperature, and the second liquid cooling / heating regulation is initiated based on the second coolant temperature; When a charging response is identified, the first coolant temperature and the second coolant temperature are combined to perform graded control, wherein a graded calculation is performed based on different temperature differences to obtain a third coolant temperature during the charging response.

[0050] It should be noted that in this embodiment, the charging temperature range is generally between 0°C and 45°C. When the temperature exceeds 45°C, the electrolyte inside the battery may decompose, resulting in thermal runaway of the battery. When the temperature is below 0°C, the charging process may become inefficient and may even cause irreversible damage to the lithium battery. The discharge temperature range is usually between -20°C and 60°C. Low temperature will cause the discharge performance of the battery to drop significantly, and may increase the internal resistance of the battery, thereby affecting the energy release efficiency of the battery. Excessive temperature will cause the battery temperature to be too high, affecting the battery life and even causing safety risks. Therefore, the optimal operating temperature of the battery pack corresponding to the battery cell structure is between 20°C and 30°C. This temperature range can maximize the charging efficiency and discharge performance of the battery while extending the battery life.

[0051] Specifically, taking the working temperature between 20°C and 30°C as an example, when no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a first range, wherein the first range is "0°C-8°C", the first liquid cooling / heating regulation is started based on the ambient temperature and ambient humidity, wherein the first temperature of the coolant is obtained based on the ambient temperature and the ambient humidity combined with the corresponding weight calculation, wherein the weight of the ambient temperature is greater than the weight of the ambient humidity, and the specific different weights can be dynamically updated, and the first liquid cooling / heating regulation is started based on the first temperature of the coolant. Specifically, taking the current ambient temperature of 40°C and the ambient humidity of 50% as an example, the first temperature of the coolant is calculated to be 25°C through the ambient temperature weight α and the ambient humidity β, wherein α is 0.5 and β is 10. If the current battery pack temperature is 30°C, liquid cooling regulation is performed based on the first temperature of the coolant, and when the battery pack temperature is 22°C, liquid heating regulation is performed based on the first temperature of the coolant.

[0052] Further, when no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a second range, wherein the second range is "8°C-15°C", the second liquid cooling / heating regulation is started based on the vehicle driving mode, wherein the vehicle driving mode includes ordinary driving and characteristic driving, and when the characteristic driving is identified, the characteristic driving is, for example, a high-power sports mode, at this time, the first temperature of the coolant is adaptively updated to obtain the second temperature of the coolant, and the second liquid cooling / heating regulation is started based on the second temperature of the coolant. Specifically, when the vehicle is driving, the temperature difference between the battery pack temperature and the temperature in the pipeline is in the range of 8°C-15°C, thereby the first range is transitioned to the second range. The second range is therefore required to be adaptively updated based on the first coolant temperature to obtain the second coolant temperature. In the high-power sports mode, the discharge efficiency of the battery is improved, so the battery pack temperature will rise rapidly. At this time, the second coolant temperature needs to be adaptively adjusted based on the corresponding increase ratio. Specifically, in the normal driving mode, the battery pack temperature is 30°C. In the first high-power driving sports mode, the battery pack temperature rises rapidly to 39°C. At this time, the increase ratio is 30%. Correspondingly, it is necessary to round the power ratio (0.09) based on the premise that the first coolant temperature is 25°C and the 30% decrease is combined. The obtained second coolant temperature is 22°C; When a charging response is identified, the first temperature of the coolant and the second temperature of the coolant are combined for graded regulation, wherein a graded calculation is performed based on different temperature differences to obtain a third temperature of the coolant during a charging response. Specifically, the ideal charging temperature of a lithium-ion battery is between 0°C and 45°C, so the third temperature of the coolant needs to be controlled based on the actual temperature of the battery pack, and the actual temperature of the battery pack is affected by the first temperature of the coolant and the second temperature of the coolant before the charging response is identified. Therefore, it is necessary to combine the first temperature of the coolant and the second temperature of the coolant for graded regulation. Specifically, assuming that the ideal charging temperature of the battery pack is 36°C, since the first temperature of the coolant is 25°C, and the second temperature of the coolant is lower at 22°C, the first temperature of the coolant is 25°C as the classification point, and the target difference between the battery pack temperature and the first temperature of the coolant is calculated. Based on the target difference and the preset cooling efficiency value, the current third temperature value of the coolant is calculated, wherein the battery pack temperature is 30°C, the efficiency value is 0.8, and the third temperature value of the coolant is 32°C. The battery pack is heated by the coolant of the third temperature value, so as to better prepare for preheating of the battery charging response.

[0053] According to an embodiment of the present invention, when performing regional control, it specifically includes: When no charging response is identified, liquid cooling / heat regulation is performed based on the preset primary pipeline path, including opening the secondary pipeline valve at the position of the structural component corresponding to the characteristic temperature based on the battery pack temperature; When a charging response is identified, all secondary pipeline valves are opened to open the secondary pipeline passage for liquid cooling / heat regulation.

[0054] It should be noted that in this embodiment, the liquid cooling pipeline in the traditional battery pack is a single circuit, which does not have valve control and is therefore not adjustable. In this embodiment, a secondary pipeline and a corresponding pipeline valve are set on the original primary pipeline. Figure 2 When no charging response is identified, liquid cooling / heat regulation is performed based on the preset primary pipeline path, including opening the secondary pipeline valve at the structural component position corresponding to the characteristic temperature based on the battery pack temperature, wherein the setting of the secondary pipeline has been set, and different pipeline settings are arranged for different battery cell structural component areas. The characteristic temperature indicates that there are differences in the temperatures of different areas of the battery pack. For example, the temperature of area A is significantly higher than that of other positions. At this time, it is necessary to open the diode valve at the corresponding position of area A to further remove the heat of the battery for liquid cooling; and when a charging response is identified, it is necessary to open all the secondary pipeline valves to conduct the secondary pipeline path for liquid cooling / heat regulation, so as to quickly heat up or cool down the battery in an all-round way, so that the battery temperature reaches the ideal charging state with the shortest response time.

[0055] According to an embodiment of the present invention, when the flow rate is controlled, it specifically includes: Adjusting the flow rate based on different coolant temperatures under graded control, wherein the flow rates of the coolant at the first temperature and the coolant at the second temperature are set to the first flow rate, and the flow rate of the coolant at the third temperature is set to the second flow rate; Different flow rates are matched based on different pipeline mechanisms under regional control, wherein the third flow rate is matched when all secondary pipeline valves are not opened, and the fourth flow rate is matched when all secondary pipeline valves are opened.

[0056] It should be noted that, in this embodiment, the flow rate of the coolant is usually set in the range of "1-5m / s". In this embodiment, four flow rates are set to cope with flow rate control in different application scenarios, including setting a first flow rate, a second flow rate, a third flow rate and a fourth flow rate, wherein the first flow rate is "2-4m / s", the second flow rate is "1-2m / s", the third flow rate is related to the first flow rate and the open diode path, and the specific needs are determined according to actual conditions. The fourth flow rate is positively correlated with the second flow rate. Specifically, the flow rate of the vehicle battery coolant is usually designed to be between "1-5m / s". A reasonable flow rate can ensure that the heat of the battery is effectively dissipated during charging and discharging, and keep the battery in a suitable operating temperature range, thereby optimizing battery performance, extending service life and ensuring safety. Since the third temperature of the coolant has different temperature settings, and the pipelines corresponding to the second flow rate and the fourth flow rate are all in the case where the diode path valve is fully open, therefore, in order to fully perform heat exchange, the second flow rate is set at "1-2m / s" and the fourth flow rate is set to be no higher than "2m / s".

[0057] Furthermore, the first flow rate is set to "2-4m / s" in order to quickly perform heat exchange, which can ensure that the coolant can effectively take away heat from the battery cell or battery pack and reduce the occurrence of local overheating of the battery. Accordingly, since the first flow rate is a range value, the driving mode corresponding to the second temperature of the coolant is the high power mode. Therefore, the first flow rate corresponding to the second temperature of the coolant is faster than the first flow rate corresponding to the first temperature of the coolant; further, in actual operation, since local overheating still exists, the third flow rate needs to be adjusted on the premise of opening some valves. Since the purpose of opening the valve at this time is to prevent local overheating of the battery, not for charging response, the actual flow rate of the third flow rate is gradually reduced on the basis of the first flow rate as the number of secondary pipeline valves opened is increased, so that the locally overheated battery cell structural parts can quickly and fully contact with the coolant, and the actual deceleration rate is positively correlated with the number of valves opened in the secondary pipeline, that is, the more valves are opened, the greater the deceleration.

[0058] A third aspect of the present invention provides a computer-readable storage medium, which includes a method program for intelligently controlling liquid cooling and heat of battery cell structural components. When the method program for intelligently controlling liquid cooling and heat of battery cell structural components is executed by a processor, the steps of a method for intelligently controlling liquid cooling and heat of battery cell structural components as described in any one of the above items are implemented.

[0059] The present invention discloses a method, system and medium for intelligent liquid cooling and heat control of battery cell structural parts, which are equipped with a variety of liquid cooling / heat control mechanisms. By refining the types of application scenarios, the vehicle's electricity consumption can be allocated more reasonably, and the temperature can be reduced or increased in a targeted manner by grading the temperature. At the same time, setting different areas and flow rates can better solve the problems of low circulation efficiency of the coolant path and lack of fixed-point control.

[0060] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0061] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0062] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0063] A person of ordinary skill in the art can understand that: all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiment; and the aforementioned storage medium includes: a mobile storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0064] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention can be essentially or partly reflected in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

Claims

1. A method for intelligently controlling liquid cooling and heating of battery cell structural parts, characterized in that: The following steps are involved: Obtain the temperature data of the monitored battery cell structural components; Obtaining environmental parameters of the vehicle's environment and vehicle function setting parameters; Performing intelligent regulation based on the temperature data, wherein the intelligent regulation includes hierarchical regulation, regional regulation and flow rate regulation; During the control process, intelligent control correction is performed based on the environmental parameters and / or the vehicle function setting parameters.

2. A method for intelligently controlling liquid cooling and heating of battery cell structural parts according to claim 1, characterized in that: The obtaining of the monitored temperature data of the battery cell structure specifically includes: Establishing a communication response with a temperature sensor group disposed on the battery pack, wherein: A corresponding pipeline temperature sensor is provided in the liquid cooling pipeline, and the temperature in the pipeline is obtained based on the pipeline temperature sensor; The battery cell structure is provided with a corresponding patch temperature sensor, and the battery pack temperature is obtained based on the patch temperature sensor; The temperature data is obtained based on the temperature in the pipeline and the temperature of the battery pack.

3. A method for intelligently controlling liquid cooling and heating of battery cell structural parts according to claim 2, characterized in that: The step of obtaining the environmental parameters of the vehicle environment and the vehicle function setting parameters specifically includes: The environmental parameters include at least the ambient temperature and the ambient humidity, and the vehicle function setting parameters include the vehicle driving mode and the charging response; Acquiring the ambient temperature based on a temperature sensor disposed on the vehicle body; Acquiring the ambient humidity based on a humidity sensor disposed on the vehicle body; The vehicle driving mode and the charging response of the current vehicle are obtained based on the vehicle-mounted terminal.

4. A method for intelligently controlling liquid cooling and heating of battery cell structural parts according to claim 3, characterized in that: In hierarchical regulation, it specifically includes: When no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a first range, starting a first liquid cooling / heating regulation based on the ambient temperature and the ambient humidity, wherein a first temperature of the coolant is obtained based on the ambient temperature and the ambient humidity combined with corresponding weight calculations, and the first liquid cooling / heating regulation is started based on the first temperature of the coolant; When no charging response is identified, when the difference between the battery pack temperature and the temperature in the pipeline is within a second range, a second liquid cooling / heating regulation is initiated based on a vehicle driving mode, wherein the vehicle driving mode includes ordinary driving and characteristic driving, and when the characteristic driving is identified, a second coolant temperature is obtained by adaptively updating based on the first coolant temperature, and the second liquid cooling / heating regulation is initiated based on the second coolant temperature; When a charging response is identified, the first coolant temperature and the second coolant temperature are combined to perform graded control, wherein a graded calculation is performed based on different temperature differences to obtain a third coolant temperature during the charging response.

5. A method for intelligently controlling liquid cooling and heating of battery cell structural parts according to claim 4, characterized in that: When regulating by region, it specifically includes: When no charging response is identified, liquid cooling / heat regulation is performed based on the preset primary pipeline path, including opening the secondary pipeline valve at the position of the structural component corresponding to the characteristic temperature based on the battery pack temperature; When a charging response is identified, all secondary pipeline valves are opened to open the secondary pipeline passage for liquid cooling / heat regulation.

6. A method for intelligently controlling liquid cooling and heating of battery cell structural parts according to claim 5, characterized in that: When regulating the flow rate, it specifically includes: Adjusting the flow rate based on different coolant temperatures under graded control, wherein the flow rates of the coolant at the first temperature and the coolant at the second temperature are set to the first flow rate, and the flow rate of the coolant at the third temperature is set to the second flow rate; Different flow rates are matched based on different pipeline mechanisms under regional control, wherein the third flow rate is matched when all secondary pipeline valves are not opened, and the fourth flow rate is matched when all secondary pipeline valves are opened.

7. A battery cell structural component liquid cooling and heat intelligent control system, characterized in that: The invention comprises a memory and a processor, wherein the memory comprises a method program for intelligently controlling liquid cooling and heat of a battery cell structure, and when the method program for intelligently controlling liquid cooling and heat of a battery cell structure is executed by the processor, the following steps are implemented: Obtain the temperature data of the monitored battery cell structural components; Obtaining environmental parameters of the vehicle's environment and vehicle function setting parameters; Performing intelligent regulation based on the temperature data, wherein the intelligent regulation includes hierarchical regulation, regional regulation and flow rate regulation; During the control process, intelligent control correction is performed based on the environmental parameters and / or the vehicle function setting parameters.

8. A battery cell structural component liquid cooling and heat intelligent control system according to claim 7, characterized in that: The obtaining of the monitored temperature data of the battery cell structure specifically includes: Establishing a communication response with a temperature sensor group disposed on the battery pack, wherein: A corresponding pipeline temperature sensor is provided in the liquid cooling pipeline, and the temperature in the pipeline is obtained based on the pipeline temperature sensor; The battery cell structure is provided with a corresponding patch temperature sensor, and the battery pack temperature is obtained based on the patch temperature sensor; The temperature data is obtained based on the temperature in the pipeline and the temperature of the battery pack.

9. A battery cell structural component liquid cooling and heat intelligent control system according to claim 8, characterized in that: The step of obtaining the environmental parameters of the vehicle environment and the vehicle function setting parameters specifically includes: The environmental parameters include at least the ambient temperature and the ambient humidity, and the vehicle function setting parameters include the vehicle driving mode and the energy consumption per unit time parameter; Acquiring the ambient temperature based on a temperature sensor disposed on the vehicle body; Acquiring the ambient humidity based on a humidity sensor disposed on the vehicle body; The vehicle driving mode and the energy consumption parameter per unit time of the current vehicle are obtained based on the vehicle-mounted terminal.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a method program for intelligently controlling liquid cooling and heat of a battery cell structural component. When the method program for intelligently controlling liquid cooling and heat of a battery cell structural component is executed by a processor, the steps of a method for intelligently controlling liquid cooling and heat of a battery cell structural component as claimed in any one of claims 1 to 6 are implemented.

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