Automobile battery thermal management system and automobile product

Abstract

This invention discloses an automotive battery thermal management system and an automotive product. Besides managing the power battery's thermal performance based on battery temperature information (an indicator of the battery's real-time temperature), this invention also selects the combination of heat dissipation units from a multi-mode heat dissipation module based on multi-source parameter information. Since different heat dissipation units have different heat dissipation physical principles, and these principles correspond to different response speeds, energy consumption levels, etc., this invention can flexibly adapt to the real-time temperature and temperature change trends of the power battery. This facilitates the appropriate configuration of the automotive battery thermal management system, enabling it to meet the power battery's heat dissipation needs while avoiding excessive resource input to the system, which could lead to excessive energy consumption and affect other vehicle performance aspects such as driving range, thus improving the user experience. This invention has wide applications in the automotive technology field.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and in particular to an automotive battery thermal management system and automotive products. Background Technology

[0002] New energy vehicles include pure electric vehicles and hybrid electric vehicles, which use power batteries as the energy source to drive the vehicle. Because power batteries generate heat during charging and discharging, insufficient heat dissipation can lead to overheating, causing structural damage to the battery and even fires. Furthermore, the heat exchange rate between the power battery and the environment is relatively slow; therefore, a thermal management system is needed to manage the battery's thermal properties.

[0003] Because of the complex operating environment of automobiles, the charging and discharging conditions of power batteries are also complex, resulting in complex temperature variations. However, current automotive battery thermal management systems struggle to flexibly adapt to the thermal management needs of power batteries. For example, current automotive battery thermal management systems employ simplistic heat dissipation methods and control logic, making it difficult to track the real-time temperature and temperature change trends of the power battery. This leads to a mismatch between the heat dissipation rate of the automotive battery thermal management system and the heat dissipation requirements of the power battery at any given moment. On the one hand, excessively high parameter settings in the automotive battery thermal management system can result in excessive energy consumption, affecting vehicle range and other performance characteristics. On the other hand, excessively low parameter settings can fail to meet the heat dissipation requirements of the power battery, posing a risk of overheating and fires. Summary of the Invention

[0004] In view of at least one of the above-mentioned technical problems, the purpose of this invention is to provide an automotive battery thermal management system and an automotive product.

[0005] On one hand, embodiments of the present invention include an automotive battery thermal management system, the automotive battery thermal management system comprising: Battery temperature detection module; the battery temperature detection module is used to detect the power battery and obtain battery temperature information; Multi-source parameter detection module; the multi-source parameter detection module is used to detect multiple detection objects and obtain multi-source parameter information; A multi-mode heat dissipation module; the multi-mode heat dissipation module includes multiple heat dissipation units, which control the heat dissipation of the power battery based on corresponding physical principles; wherein, the physical principles of different heat dissipation units are different. A control module; the control module is used to control the multi-mode heat dissipation module according to the battery temperature information and the multi-source parameter information.

[0006] Furthermore, the multi-source parameter detection module includes: An ambient temperature detection unit is used to detect the environment in which the power battery is located and obtain ambient temperature information. A battery status detection unit; the battery status detection unit is used to detect the power battery and obtain battery status information; the battery status information includes the state of charge and charging / discharging voltage and current of the power battery; The vehicle operating condition detection unit is used to detect the vehicle's driving management system and obtain vehicle operating condition information, including the vehicle's speed, acceleration, accelerator pedal opening, and ambient slope.

[0007] Furthermore, the multi-mode heat dissipation module includes: Liquid cooling heat dissipation unit; the liquid cooling heat dissipation unit is used for controlled liquid cooling heat dissipation of the power battery; Air-cooled heat dissipation unit; the air-cooled heat dissipation unit is used to controllably perform air-cooled heat dissipation on the power battery; Phase change heat preservation unit; the phase change heat preservation unit is used to perform phase change heat preservation on the power battery.

[0008] Furthermore, controlling the multi-mode heat dissipation module based on the battery temperature information and the multi-source parameter information includes: Multiple multidimensional value ranges are set; the multidimensional value ranges are comparable to the battery temperature information and the multi-source parameter information; Each of the aforementioned multidimensional value ranges is assigned its own thermal management mode; the thermal management mode includes a combination of the multiple heat dissipation units to be controlled. Based on the battery temperature information and the multi-source parameter information, the corresponding range of multi-dimensional values ​​is determined; Based on the determined range of multidimensional values, the corresponding thermal management mode is determined; According to the thermal management mode, the corresponding multiple heat dissipation units are controlled to operate.

[0009] Furthermore, controlling the multi-mode heat dissipation module based on the battery temperature information and the multi-source parameter information includes: Obtain the battery temperature information in time series form, and the multi-source parameter information in time series form; Based on the battery temperature information, determine the measured battery temperature curve; Based on the measured battery temperature curve, the temperature of the power battery is simulated according to the multi-source parameter information to obtain the battery temperature simulation curve. Based on the measured battery temperature curve and the simulated battery temperature curve, a predicted battery temperature curve is obtained. The multi-mode heat dissipation module is controlled based on the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve.

[0010] Further, controlling the multi-mode heat dissipation module based on the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve includes: The measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve are respectively defined as the maximum slope curve, the medium slope curve, and the minimum slope curve; Based on the maximum slope curve, the medium slope curve, and the minimum slope curve, the working time periods of the liquid cooling heat dissipation unit, the air cooling heat dissipation unit, and the phase change heat preservation unit are determined respectively. When the time enters any of the aforementioned working time periods, the heat dissipation unit corresponding to the working time period is controlled to operate.

[0011] Furthermore, the step of controlling the multi-mode heat dissipation module based on the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve further includes: When the time enters any of the aforementioned working periods, control the other heat dissipation units besides the heat dissipation unit corresponding to the working period to stop working.

[0012] Further, the step of determining the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve as the maximum slope curve, the medium slope curve, and the minimum slope curve, respectively, includes: Obtain the average slope of the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve; Among the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve, the curve with the largest average slope is determined as the maximum slope curve, the curve with a medium average slope is determined as the medium slope curve, and the curve with the smallest average slope is determined as the minimum slope curve.

[0013] Further, determining the respective operating time periods of the liquid-cooled heat dissipation unit, the air-cooled heat dissipation unit, and the phase-change heat preservation unit based on the maximum slope curve, the medium slope curve, and the minimum slope curve includes: The time period corresponding to the maximum slope curve is determined as the working time period corresponding to the phase change insulation unit; The time period corresponding to the moderate slope curve is determined as the working time period corresponding to the air-cooled heat dissipation unit; The time period corresponding to the minimum slope curve is determined as the working time period corresponding to the liquid cooling heat dissipation unit.

[0014] On the other hand, embodiments of the present invention also include automotive products, which include a power battery and the automotive battery thermal management system described in the embodiments.

[0015] The beneficial effects of this invention are as follows: In addition to managing the power battery based on battery temperature information (an indicator of the current real-time temperature), the automotive battery thermal management system in this embodiment also selects the combination of heat dissipation units from the multi-mode heat dissipation modules to be invoked based on multi-source parameter information. Since the multi-source parameter information reflects the interaction between the power battery and the environment, and the degree of heat exchange between them, it includes information related to the temperature change trend of the power battery. Furthermore, because different heat dissipation units have different heat dissipation physical principles, and these principles correspond to different response speeds and energy consumption levels, the automotive battery thermal management system in this embodiment can flexibly adapt to the real-time temperature and temperature change trend of the power battery. This facilitates appropriate configuration of the automotive battery thermal management system, enabling it to meet the heat dissipation needs of the power battery and avoiding excessive resource input to the system, which could lead to excessive energy consumption and affect other vehicle performance aspects such as driving range, thus improving the user experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the automotive battery thermal management system in the embodiment; Figure 2 This is a schematic diagram illustrating the steps of the automotive battery thermal management method in the embodiment. Figure 3 This is a schematic diagram illustrating the principle of steps S301B-S305B in the embodiment. Detailed Implementation

[0017] This embodiment provides an automotive battery thermal management system. (Refer to...) Figure 1 The automotive battery thermal management system includes a multi-source parameter detection module, a battery temperature detection module, a control module, and a multi-mode heat dissipation module. The automotive battery thermal management system is used for thermal management of the power battery, including heat dissipation and heating.

[0018] In this embodiment, refer to Figure 1The power battery consists of multiple battery cells, which are combined in series and parallel. Space can be reserved between some battery cells for pipes such as air ducts or water pipes to pass through.

[0019] In this embodiment, the multi-source parameter detection module includes multiple detection units. Different detection units have different detection objects, thereby detecting the parameters of the detection object. The parameters detected by each detection unit are combined to form multi-source parameter information.

[0020] Specifically, the multi-source parameter detection module includes an ambient temperature detection unit, a battery status detection unit, and a vehicle operating condition detection unit. The ambient temperature detection unit detects the environment in which the vehicle operates; that is, it monitors the environment to obtain ambient temperature information. The battery state detection unit detects the power battery; that is, it detects the power battery to obtain its state of charge. and charging / discharging voltage and current, wherein the charging / discharging voltage and current specifically include the charging voltage. Charging current Discharge voltage and discharge current The vehicle condition testing unit (VTM) tests the vehicle's driving management system, specifically by measuring the vehicle's speed. Acceleration , switch opening and environmental slope Vehicle operating condition information, etc.

[0021] In this embodiment, the battery temperature detection module detects the temperature of the power battery to obtain battery temperature information. Specifically, the battery temperature detection module can detect the temperature of the surface or a specific location inside the power battery as battery temperature information. It can also detect the temperature at multiple locations and calculate the average value as battery temperature information. .

[0022] In this embodiment, the multi-mode heat dissipation module includes multiple heat dissipation units, each with its own heat dissipation physical principle. Each heat dissipation unit is controlled by the control module to dissipate heat from the power battery.

[0023] For example, refer to Figure 1The multi-mode heat dissipation module includes a liquid cooling unit, an air cooling unit, and a phase change insulation unit. The liquid cooling unit pumps a liquid cooling medium (such as pure water or a 50% ethylene glycol aqueous solution) to exchange heat with the battery, utilizing the liquid's high specific heat capacity to absorb the heat generated during battery operation, thus providing liquid cooling. The air cooling unit blows out a gaseous cooling medium (air) to exchange heat with the battery, utilizing the gaseous cooling medium's high fluidity to absorb the heat generated during battery operation, thus providing air cooling. The phase change insulation unit utilizes phase change materials (e.g.,...) For example, a composite phase change material composed of paraffin wax and expanded graphite (with a phase change temperature of 32-35℃ and a latent heat of 180J / g) undergoes an endothermic phase change when the temperature rises to the phase change temperature, absorbing the heat generated by the power battery during operation, thereby dissipating heat from the power battery through phase change. Moreover, the phase change insulation unit can also undergo an exothermic phase change when the temperature drops to the phase change temperature, thereby transferring heat to the power battery and causing the power battery to heat up. Therefore, within a certain heat range, the phase change insulation unit maintains the temperature of the power battery near the phase change temperature by exchanging heat with the power battery through phase change.

[0024] In this embodiment, refer to Figure 1 The liquid cooling unit can be equipped with components such as coolant circulation pipes, an electric pump, and plate heat exchangers. Specifically, plate heat exchangers are installed outside the power battery and in the space between the internal battery cells to make thermal contact with the battery cells. Coolant circulation pipes deliver liquid cooling medium to each plate heat exchanger, and an electric pump is used to pump the liquid cooling medium. The control module can control the speed of the electric pump (adjustable within the range of 0-3000 rpm), thereby controlling the start-up or shutdown of the liquid cooling unit.

[0025] In this embodiment, refer to Figure 1 The air-cooled heat dissipation unit can be equipped with components such as silent fans. Specifically, multiple silent fans are installed outside the power battery, allowing the airflow generated by the fans to conduct heat between the fans and the battery cells. Air ducts can also be installed to allow airflow from the silent fans to pass through, thereby improving the heat dissipation efficiency of the air-cooled heat dissipation unit. The control module can control the fan speed (adjustable within the range of 0-5 m / s), thus controlling the start or stop operation of the air-cooled heat dissipation unit.

[0026] In this embodiment, the liquid cooling unit and the air cooling unit are directly controllable and belong to active heat dissipation components, while the phase change insulation unit is not directly controllable and belongs to passive heat dissipation components. (Refer to...) Figure 1A separate circuit (including pipes and an electric pump, independent of the pipes and electric pump entering the power battery) can be set up from the liquid cooling unit to dissipate heat from the phase change insulation unit. Thus, when the control module controls this circuit of the liquid cooling unit to operate, it can enhance the heat dissipation capacity of the phase change insulation unit, thereby achieving indirect active control of the phase change insulation unit. Therefore, in this embodiment, when the control module controls the liquid cooling unit itself to operate, it is actually controlling the circuit of the liquid cooling unit that directly exchanges heat with the power battery; when the control module controls the phase change insulation unit to operate, it is actually controlling the circuit of the liquid cooling unit that exchanges heat with the phase change insulation unit.

[0027] In this embodiment, a component with functions such as data input, data processing, data output and control, such as a vehicle control unit (VCU), can be used as the control module.

[0028] In this embodiment, the automotive battery thermal management system described herein can be used to execute the automotive battery thermal management method. (Refer to...) Figure 2 The automotive battery thermal management method includes the following steps: S1. Test the power battery and obtain battery temperature information; S2. Detect multiple objects to obtain multi-source parameter information; S3. Control the multi-mode heat dissipation module based on battery temperature information and multi-source parameter information.

[0029] In this embodiment, the control module can set the following when executing steps S1-S2: , ... ... Multiple detection times are performed, and at each detection time, the battery temperature detection module and the multi-source parameter detection module are called to perform the detection.

[0030] For example, when the time reaches the detection moment The control module executes step S1, which calls the battery temperature detection module to detect the power battery and obtain the detection time. Corresponding battery temperature information Execute step S2, call the multi-source parameter detection module to perform detection, and obtain the detection time. Corresponding ambient temperature information State of charge Charging voltage Charging current Discharge voltage Discharge current Driving speed Acceleration , switch opening and environmental slope Based on the same principle, different values ​​can be detected at different detection times, thereby obtaining various parameters in time series form, including: Battery temperature information in time series format: , ... ...

[0031] Ambient temperature information in time series format: , ... ...

[0032] State of charge in time series form: , ... ...

[0033] Charging voltage in time series form: , ... ...

[0034] Charging current in time series form: , ... ...

[0035] Discharge voltage in time series form: , ... ...

[0036] Discharge current in time series form: , ... ...

[0037] Driving speed in time series form: , ... ...

[0038] Driving acceleration in time series form: , ... ...

[0039] Gate opening in time series form: , ... ...

[0040] Environmental slope in time series form: , ... ...

[0041] In this embodiment, the detection time This is the last detection moment that has been reached so far, therefore the battery temperature information detected at this detection moment... and ambient temperature information These parameters are the latest parameters detected so far.

[0042] In this embodiment, when the control module executes step S3, which is to control the multi-mode heat dissipation module based on battery temperature information and multi-source parameter information, it can specifically perform the following steps: S301A. Set multiple multidimensional value ranges; S302A. Set separate thermal management modes for each multidimensional value range; S303A. Determine the corresponding multi-dimensional value range based on battery temperature information and multi-source parameter information; S304A. Determine the corresponding thermal management mode based on the determined multidimensional value range; S305A. Controls multiple heat dissipation units to operate according to the thermal management mode.

[0043] Steps S301A-S305A are the first execution method of step S3.

[0044] In step S301A, the multidimensional value range set by the control module is comparable to the battery temperature information and multi-source parameter information, thereby determining whether the multidimensional parameters composed of the battery temperature information and multi-source parameter information are within the multidimensional value range.

[0045] In this embodiment, when the control module executes step S302A, it can set the control logic shown in Table 1.

[0046] Table 1

[0047] In the control logic shown in Table 1, for the state of charge... Discharge voltage Discharge current Driving speed Acceleration and throttle opening and environmental slope These parameters can be mapped to vehicle operating condition types such as "stable operating condition" or "heavy load operating condition" based on the mapping relationship obtained through calibration.

[0048] In step S303A, the control module determines the battery temperature information. and ambient temperature information Within which multidimensional value range do these parameters fall? In step S304A, the control module determines the corresponding thermal management mode based on the multidimensional value range determined in step S303A, and then executes step S305A to control the corresponding multiple heat dissipation units to operate according to the thermal management mode.

[0049] In this embodiment, by executing steps S301A-S305A, the automotive battery thermal management system, in addition to relying on battery temperature information, This indicator, representing the current real-time temperature of the power battery, is used for thermal management of the power battery, and also considers ambient temperature information. The combination of heat dissipation units in the multi-mode heat dissipation module to be called is selected based on multi-source parameter information; due to ambient temperature information... The multi-source parameter information represents the interaction between the power battery and the environment, reflecting the degree of heat exchange between the power battery and the environment, and thus includes information related to the temperature change trend of the power battery. Moreover, since different heat dissipation units have different heat dissipation physical principles, and different heat dissipation physical principles correspond to different response speeds, energy consumption levels, etc., the execution steps S301A-S305A can flexibly adapt to the real-time temperature and temperature change trend of the power battery. This is conducive to the appropriate configuration of the vehicle battery thermal management system, so that the vehicle battery thermal management system can meet the heat dissipation requirements of the power battery, and can also avoid excessive resource input to the vehicle battery thermal management system, thereby causing excessive energy consumption and affecting other vehicle performance such as driving range, and improving user experience.

[0050] In this embodiment, when the control module executes step S3, which is to control the multi-mode heat dissipation module based on battery temperature information and multi-source parameter information, it can specifically perform the following steps: S301B. Acquire battery temperature information in time series format, as well as multi-source parameter information in time series format; S302B. Determine the measured battery temperature curve based on battery temperature information; S303B. Based on the measured battery temperature curve, the temperature of the power battery is simulated according to multi-source parameter information to obtain the battery temperature simulation curve. S304B. Based on the measured battery temperature curve and the simulated battery temperature curve, a curve prediction curve is obtained; S305B. Controls the multi-mode heat dissipation module based on the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve.

[0051] Steps S301B-S305B are the second execution method of step S3.

[0052] In step S301B, the control module uses the time prior to the current moment... , ... ... At multiple detection points, the battery temperature detection module and the multi-source parameter detection module are invoked respectively to perform detection and obtain battery temperature information in time series form. , ... ... ,as well as , ... ... Multi-source parameter information in time series form.

[0053] In step S302B, due to battery temperature information , ... ... This represents the temperature information detected by direct temperature detection of the power battery at various detection times, with each value corresponding to... , ... ... Therefore, by interpolating and other processing methods on the battery temperature information in time series format, a [database / structure] can be generated. Figure 1 The measured battery temperature curve is shown below. The endpoint of the measured battery temperature curve corresponds to the detection time. That is, the last detection moment that has been executed at the current time. Ignoring errors, the detection moment can be considered as... It refers to the current moment.

[0054] The value corresponding to the endpoint of the measured battery temperature curve is In step S303B, the measured battery temperature curve is used as the basis, that is... Ambient temperature information in time series form, serving as the initial temperature of the power battery. , ... ... Multi-source parameter information in time series form is used as the environmental conditions for the power battery to perform temperature simulation. Specifically, the control module can perform temperature simulation locally or request a cloud server for temperature simulation. The temperature simulation uses the initial temperature and environmental conditions as the initial conditions for the power battery, and simulates the temperature changes of the power battery to determine the current temperature of the power battery. The future ( The specific values ​​can be set in the simulation software at each time point. , ... The corresponding temperature values ​​are used to form a battery temperature simulation curve.

[0055] Reference Figure 3 The starting point of the simulated battery temperature curve and the ending point of the measured battery temperature curve are the same point; that is, the starting point of the simulated battery temperature curve corresponds to the current time. The corresponding temperature value is also .

[0056] In step S304B, the control module can execute a curve prediction algorithm or a time series prediction algorithm to predict the curve based on the measured battery temperature curve and the simulated battery temperature curve, and obtain... Figure 3 The battery temperature prediction curve shown is shown. The starting point of the battery temperature prediction curve and the ending point of the simulated battery temperature curve are the same point; that is, the starting point of the battery temperature prediction curve corresponds to the time when... .

[0057] In step S305B, the control module can control the multi-mode heat dissipation module based on the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve. Specifically, the control module can calculate the average slope of each of the measured, simulated, and predicted battery temperature curves. In this embodiment, the average slope of a curve is the slope of the line segment connecting the start and end points of the curve, which can be determined by dividing the difference between the temperature value at the end point and the temperature value at the start point by the difference between the time at the end point and the time at the start point.

[0058] After obtaining the average slope of each curve, the average slopes are compared. During the comparison, the sign of the average slope can be considered; a positive average slope is greater than a negative average slope. The curve with the largest average slope is determined as the maximum slope curve, the curve with a moderate average slope is determined as the moderate slope curve, and the curve with the smallest average slope is determined as the minimum slope curve. For example, in this embodiment, referring to... Figure 3The simulated battery temperature curve has the largest average slope, the measured battery temperature curve has a medium average slope, and the predicted battery temperature curve has the smallest average slope. Therefore, the simulated battery temperature curve is the curve with the largest slope, the measured battery temperature curve is the curve with a medium slope, and the predicted battery temperature curve is the curve with the smallest slope.

[0059] In this embodiment, the time period corresponding to the curve with the maximum slope is taken as the working time period corresponding to the phase change heat preservation unit, the time period corresponding to the curve with a medium slope is taken as the working time period corresponding to the air-cooled heat dissipation unit, and the time period corresponding to the curve with the minimum slope is taken as the working time period corresponding to the liquid-cooled heat dissipation unit. For example, refer to Figure 3 The time period corresponding to the battery temperature simulation curve is from time 1 to 2. At the time The time interval between these points is taken as the working time interval corresponding to the phase change insulation unit; the time interval corresponding to the measured battery temperature curve is taken as the time interval from moment [time]. At the time The time interval between these points is taken as the corresponding operating time of the air-cooled heat dissipation unit; the time interval corresponding to the battery temperature prediction curve is taken as the time point. The subsequent time period is the working period corresponding to the liquid cooling heat dissipation unit.

[0060] In step S305B, the control module starts timing. When the time enters any working time period, it controls the corresponding heat dissipation unit to operate. Specifically, for any given working time period, the heat dissipation unit corresponding to this working time period is the one that the control module must control to operate. Furthermore, it can also control other heat dissipation units to operate simultaneously during this working time period, thereby enhancing the heat dissipation performance of the vehicle battery thermal management system. Alternatively, it can control other heat dissipation units to pause operation during this working time period, thus reducing the energy consumption of the vehicle battery thermal management system while ensuring that the heat dissipation requirements of the power battery are met by controlling the heat dissipation unit corresponding to this working time period.

[0061] Specifically, when executing step S305B, the control module can perform the following steps: S30501. Due to time constraints It is the current moment, the moment. At the time The time interval between these intervals is the time interval that has already elapsed, while at time... At the time During the period in between, since it has not yet been determined Figure 3 The curves shown did not yet correspond to the operating time periods of the air-cooled heat dissipation unit at that time. Therefore, at that moment... At the time The heat dissipation unit that actually operates during the time interval is not necessarily the same heat dissipation unit, i.e., the air-cooled heat dissipation unit, that is determined at the current moment; if at the time... At the time If the actual cooling units operating during the specified time period include air-cooled units, then the requirement is met. Figure 3 The control logic defined by the curves shown can then jump to execute step S30502; if at time... At the time The heat dissipation units that actually operate during the time period do not include air-cooled heat dissipation units. Therefore, since the control logic determined at the current moment is not met, it can start from the current moment, i.e., the time interval. Begin a period of time (e.g., equivalent to a moment) At the time Within a certain proportion (e.g., 1 / 10) of the time interval between events, the control logic determined at the current moment is supplemented and executed, i.e., the control time interval. At the time The time period between these should be controlled so that the heat dissipation unit, i.e. the air-cooled heat dissipation unit, is working; S30502. If the jump is directly from step S30501, then the time when step S30502 is executed is time [time value missing]. If additional control logic is executed in step S30501, then the execution time of step S30502 will be later than the previous time. Slightly later (e.g., at the appointed time) ); At any moment (or moment) ) at the time During the time intervals, since it is the working period corresponding to the phase change insulation unit, the control module controls the phase change insulation unit to work (controls the circuit of the liquid cooling heat dissipation unit that exchanges heat with the phase change insulation unit to work), so that the phase change insulation unit dissipates heat from the power battery; on this basis, the control module can also choose to control other heat dissipation units, namely the liquid cooling heat dissipation unit (the circuit that directly exchanges heat with the power battery) and the air cooling heat dissipation unit to stop working, or it can choose to control all or some of the other heat dissipation units to work simultaneously; S30503. At time During the subsequent period, since it is the working period corresponding to the liquid cooling heat dissipation unit, the control module controls the liquid cooling heat dissipation unit (the circuit that directly exchanges heat with the power battery) to work, so that the liquid cooling heat dissipation unit dissipates heat from the power battery; on this basis, the control module can also choose to control other heat dissipation units, namely the air cooling heat dissipation unit and the phase change heat preservation unit to stop working, or it can choose to control all or some of the other heat dissipation units to work simultaneously.

[0062] In this embodiment, the principle behind executing steps S301B-S305B is as follows: the measured battery temperature curve is a curve generated based on battery temperature information, representing the actual temperature reached by the power battery over a past period, which is highly likely to be reached; the simulated battery temperature curve is a curve generated based on multi-source parameter information, representing the simulated and estimated temperature that the power battery will reach in the near future based on the environment in which the power battery is located, which is highly likely to be reached; the predicted battery temperature curve is a curve predicted based on the changing patterns of the measured and simulated battery temperature curves, representing the estimated temperature that the power battery may reach in the distant future based on the previous conditions of the power battery; therefore, by generating the measured, simulated, and predicted battery temperature curves, the actual temperature reached by the power battery and the temperatures it will reach in the near and distant future can be determined; different heat dissipation units dissipate heat from the power battery using different physical principles and have different heat dissipation characteristics. Among them, the phase change insulation unit has the highest heat dissipation speed and can adapt to the rapid rise in the temperature of the power battery (the corresponding curve has the largest average slope). In this scenario, however, due to the limited heat storage capacity of the phase change insulation unit, the heat dissipation capacity that can be met by using the phase change insulation unit alone is relatively small. The air-cooled heat dissipation unit has a moderate heat dissipation rate (corresponding to a moderate average slope of the curve) and a moderate heat dissipation capacity, while the liquid-cooled heat dissipation unit has the lowest heat dissipation rate (corresponding to a minimum average slope of the curve) and the largest heat dissipation capacity. Therefore, by determining the working time period of each heat dissipation unit according to the average slope of each curve, it is possible to ensure that a heat dissipation unit with matching heat dissipation characteristics works to provide heat dissipation for the power battery during the time period corresponding to each curve. This ensures that there is a corresponding heat dissipation unit to meet the basic heat dissipation requirements during each time period, enabling flexible control and fine allocation of resources for the automotive battery thermal management system, which is beneficial to reducing the energy consumption of the automotive battery thermal management system. Moreover, since the curves are continuous, that is, the heat dissipation units work in succession, the heat dissipation capacity characteristics of each heat dissipation unit complement each other while each heat dissipation unit exerts its heat dissipation rate characteristics during its working time period. This allows multiple heat dissipation units to work together as a whole, exerting complementary effects of various heat dissipation characteristics, and fully ensuring the heat dissipation requirements of the power battery.

[0063] The automotive battery thermal management system of this embodiment can be installed on a car, so that the automotive battery thermal management system and other components such as the power battery are integrated into the car. Such a car has the same technical effect as the automotive battery thermal management system in the embodiment.

[0064] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this disclosure are only relative to the relative positional relationships of the components of this disclosure in the accompanying drawings. The singular forms "a," "an," and "the" used in this disclosure are also intended to include the plural forms, unless the context clearly indicates otherwise. Moreover, unless otherwise defined, all technical and scientific terms used in this embodiment have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this embodiment specification is only for describing particular embodiments and is not intended to limit the invention. The term "and / or" as used in this embodiment includes any combination of one or more of the associated listed items.

[0065] It should be understood that although various elements may be described in this disclosure using terms such as "second," "third," etc., these elements should not be limited to these terms. These terms are used only to distinguish elements of the same type from one another. For example, an element may also be referred to as a second element without departing from the scope of this disclosure, and similarly, a second element may also be referred to as an element. The use of any and all instances or exemplary language ("e.g.," "such as," etc.) provided in this embodiment is intended only to better illustrate embodiments of the invention and, unless otherwise required, does not impose a limitation on the scope of the invention.

[0066] It should be recognized that embodiments of the present invention can be implemented or carried out by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer-readable storage medium. The method can be implemented using standard programming techniques—including a non-transitory computer-readable storage medium configured with a computer program, wherein such a storage medium causes the computer to operate in a specific and predefined manner—according to the methods and drawings described in the specific embodiments. Each program can be implemented in a high-level procedural or object-oriented programming language to communicate with the computer system. However, if desired, the program can be implemented in assembly or machine language. In any case, the language can be a compiled or interpreted language. Furthermore, for this purpose, the program can run on a programmed application-specific integrated circuit (ASIC).

[0067] Furthermore, the procedures described in this embodiment can be performed in any suitable order unless otherwise indicated by this embodiment or otherwise obviously contradict the context. The procedures (or variations and / or combinations thereof) described in this embodiment can be executed under the control of one or more computer systems configured with executable instructions, and can be implemented by hardware or a combination thereof as code (e.g., executable instructions, one or more computer programs, or one or more applications) that commonly executes on one or more processors. A computer program includes a plurality of instructions executable by one or more processors.

[0068] Furthermore, the method can be implemented in any suitable type of computing platform, including but not limited to personal computers, minicomputers, mainframes, workstations, networked or distributed computing environments, standalone or integrated computer platforms, or in communication with charged particle tools or other imaging devices, etc. Aspects of the invention can be implemented as machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optical read and / or write storage medium, RAM, ROM, etc., such that it is readable by a programmable computer, and when the storage medium or device is read by the computer, it can be used to configure and operate the computer to perform the processes described herein. Furthermore, the machine-readable code, or portions thereof, can be transmitted via wired or wireless networks. The invention of this embodiment includes these and other different types of non-transitory computer-readable storage media when such media comprises instructions or programs that implement the steps above in conjunction with a microprocessor or other data processor. When programmed according to the methods and techniques of the invention, the invention also includes the computer itself.

[0069] A computer program can be applied to input data to perform the functions of this embodiment, thereby transforming the input data to generate output data stored in non-volatile memory. The output information can also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including specific visual depictions of physical and tangible objects generated on the display.

[0070] The above are merely preferred embodiments of the present invention. The present invention is not limited to the above-described embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention, as long as they achieve the technical effects of the present invention by the same means, should be included within the scope of protection of the present invention. Within the scope of protection of the present invention, the technical solutions and / or implementation methods can have various modifications and variations.

Claims

1. A thermal management system for automotive batteries, characterized in that, The automotive battery thermal management system includes: Battery temperature detection module; the battery temperature detection module is used to detect the power battery and obtain battery temperature information; Multi-source parameter detection module; the multi-source parameter detection module is used to detect multiple detection objects and obtain multi-source parameter information; A multi-mode heat dissipation module; the multi-mode heat dissipation module includes multiple heat dissipation units, which control the heat dissipation of the power battery based on corresponding physical principles; wherein, the physical principles of different heat dissipation units are different. A control module; the control module is used to control the multi-mode heat dissipation module according to the battery temperature information and the multi-source parameter information.

2. The automotive battery thermal management system according to claim 1, characterized in that, The multi-source parameter detection module includes: An ambient temperature detection unit is used to detect the environment in which the power battery is located and obtain ambient temperature information. A battery status detection unit; the battery status detection unit is used to detect the power battery and obtain battery status information; the battery status information includes the state of charge and charging / discharging voltage and current of the power battery; The vehicle operating condition detection unit is used to detect the vehicle's driving management system and obtain vehicle operating condition information, including the vehicle's speed, acceleration, accelerator pedal opening, and ambient slope.

3. The automotive battery thermal management system according to claim 1 or 2, characterized in that, The multi-mode heat dissipation module includes: Liquid cooling heat dissipation unit; the liquid cooling heat dissipation unit is used for controlled liquid cooling heat dissipation of the power battery; Air-cooled heat dissipation unit; the air-cooled heat dissipation unit is used to controllably perform air-cooled heat dissipation on the power battery; Phase change heat preservation unit; the phase change heat preservation unit is used to perform phase change heat preservation on the power battery.

4. The automotive battery thermal management system according to claim 3, characterized in that, The step of controlling the multi-mode heat dissipation module based on the battery temperature information and the multi-source parameter information includes: Multiple multidimensional value ranges are set; the multidimensional value ranges are comparable to the battery temperature information and the multi-source parameter information; Each of the aforementioned multidimensional value ranges is assigned its own thermal management mode; the thermal management mode includes a combination of the multiple heat dissipation units to be controlled. Based on the battery temperature information and the multi-source parameter information, the corresponding range of multi-dimensional values ​​is determined; Based on the determined range of multidimensional values, the corresponding thermal management mode is determined; According to the thermal management mode, the corresponding multiple heat dissipation units are controlled to operate.

5. The automotive battery thermal management system according to claim 3, characterized in that, The step of controlling the multi-mode heat dissipation module based on the battery temperature information and the multi-source parameter information includes: Obtain the battery temperature information in time series form, and the multi-source parameter information in time series form; Based on the battery temperature information, determine the measured battery temperature curve; Based on the measured battery temperature curve, the temperature of the power battery is simulated according to the multi-source parameter information to obtain the battery temperature simulation curve. Based on the measured battery temperature curve and the simulated battery temperature curve, a predicted battery temperature curve is obtained. The multi-mode heat dissipation module is controlled based on the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve.

6. The automotive battery thermal management system according to claim 5, characterized in that, The step of controlling the multi-mode heat dissipation module based on the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve includes: The measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve are respectively defined as the maximum slope curve, the medium slope curve, and the minimum slope curve; Based on the maximum slope curve, the medium slope curve, and the minimum slope curve, the working time periods of the liquid cooling heat dissipation unit, the air cooling heat dissipation unit, and the phase change heat preservation unit are determined respectively. When the time enters any of the aforementioned working time periods, the heat dissipation unit corresponding to the working time period is controlled to operate.

7. The automotive battery thermal management system according to claim 6, characterized in that, The step of controlling the multi-mode heat dissipation module based on the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve further includes: When the time enters any of the aforementioned working periods, control the other heat dissipation units besides the heat dissipation unit corresponding to the working period to stop working.

8. The automotive battery thermal management system according to claim 6, characterized in that, The step of determining the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve as the maximum slope curve, the medium slope curve, and the minimum slope curve, respectively, includes: Obtain the average slope of the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve; Among the measured battery temperature curve, the simulated battery temperature curve, and the predicted battery temperature curve, the curve with the largest average slope is determined as the maximum slope curve, the curve with a medium average slope is determined as the medium slope curve, and the curve with the smallest average slope is determined as the minimum slope curve.

9. The automotive battery thermal management system according to claim 6, characterized in that, The step of determining the operating time periods of the liquid cooling heat dissipation unit, the air cooling heat dissipation unit, and the phase change heat preservation unit based on the maximum slope curve, the medium slope curve, and the minimum slope curve, respectively, includes: The time period corresponding to the maximum slope curve is determined as the working time period corresponding to the phase change insulation unit; The time period corresponding to the moderate slope curve is determined as the working time period corresponding to the air-cooled heat dissipation unit; The time period corresponding to the minimum slope curve is determined as the working time period corresponding to the liquid cooling heat dissipation unit.

10. An automobile product, characterized in that, The automotive product includes a power battery and the automotive battery thermal management system as described in any one of claims 1-9.

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