Circulating water pump rotating speed control method and system for energy storage heat management system

Abstract

The invention discloses a circulating water pump rotating speed control method and system for an energy storage heat management system. The method comprises the steps that state parameters in the energy storage battery management system and the heat management system are collected; performing data processing according to the state parameters to obtain processed data; determining a control mode of the thermal management system by judging the battery temperature and the liquid supply temperature according to the processed data; and dynamically controlling the rotating speed of the circulating water pump according to the processed data and the control mode. According to the method, the battery temperature, the battery temperature change rate and the liquid supply temperature are monitored in real time, the rotating speed of the circulating water pump is dynamically adjusted, the temperature control strategy is optimized, and energy consumption is effectively reduced through accurate rotating speed adjustment.

Description

Technical Field

[0001] This invention relates to a method and system for controlling the speed of a circulating water pump in an energy storage thermal management system, belonging to the field of battery thermal management technology. Background Technology

[0002] Existing energy storage liquid cooling thermal management systems rely on judging the extreme temperature values ​​of a single battery (such as Tbmax or Tbmin) and do not respond to the rate of temperature change during charging and discharging, making the battery prone to overheating or underheating. The control of the circulating water pump speed is also coarse, often using fixed speed or segmented speed control, which is not precise enough and leads to wasted water pump energy. When the battery temperature sensor malfunctions, the system is prone to loss of control and lacks a redundant control mechanism.

[0003] Therefore, it is particularly important to develop a temperature control strategy that can optimize the thermal management system and a control method that can precisely adjust the circulating water pump. Summary of the Invention

[0004] The purpose of this invention is to provide a circulating water pump speed control method and system for an energy storage thermal management system. By sensing the battery temperature change trend in advance through battery temperature and temperature change rate, it supports fine-tuning of the circulating water pump speed, controls the battery temperature within the normal operating range, reduces the energy consumption of the circulating water pump, and supports circulating water pump speed control based on the liquid supply temperature when the battery temperature acquisition data is abnormal.

[0005] To achieve the above objectives, the present invention is implemented using the following technical solution.

[0006] In a first aspect, the present invention provides a method for controlling the speed of a circulating water pump in an energy storage thermal management system, comprising:

[0007] Collect status parameters from the energy storage battery management system and thermal management system;

[0008] Based on the state parameters, data processing is performed to obtain the processed data;

[0009] Based on the processed data, the control mode of the thermal management system is determined by judging the battery temperature and the liquid supply temperature.

[0010] Based on the processed data and control mode, the rotational speed of the circulating water pump is dynamically controlled.

[0011] Furthermore, the status parameters include battery temperature, battery temperature change curve, and electrolyte supply temperature. and the speed of the circulating water pump .

[0012] Furthermore, the processed data includes the battery's highest temperature. Minimum battery temperature Average battery temperature Battery average temperature change rate and the rate of change of liquid supply temperature ;

[0013] The average temperature change rate of the battery This refers to the difference in battery temperature change per unit time, including: when the average battery temperature increases, When the average battery temperature decreases, When the average battery temperature remains constant, ;

[0014] Under normal circumstances, the battery temperature is monitored, and the circulating water pump speed is controlled. There is a connection:

[0015] Will The temperature range is divided into three zones: a range with gradual temperature changes, a range with moderate temperature changes, and a range with drastic temperature changes. These zones are used as the main strategies for regulating the speed of the circulating water pump.

[0016] The temperature range with gradual changes is represented as: The moderate temperature variation range is expressed as: The range of drastic temperature changes is represented as ,in , Set a value for the parameter and .

[0017] Furthermore, the rate of change of the supply liquid temperature This refers to the difference in supply liquid temperature per unit time, including: when the supply liquid temperature increases, When the supply liquid temperature decreases, When the supply temperature remains constant, ;

[0018] In abnormal situations, the supply liquid temperature is assessed, and the circulating water pump speed is controlled. There is a connection:

[0019] Will The temperature is divided into three ranges: a range with a gradual change in the supply temperature, a range with a moderate change in the temperature, and a range with a drastic change in the temperature. These ranges are used as auxiliary strategies for controlling the speed of the circulating water pump.

[0020] The range of gradual temperature variation in the liquid supply is represented as follows: The moderate temperature variation range is expressed as: The range of drastic temperature changes is represented as ,in , Set a value for the parameter and .

[0021] Furthermore, the control modes in the thermal management system include a cooling mode, a heating mode, and a self-circulation mode, based on the battery's highest temperature. Minimum battery temperature Liquid supply temperature Circulating water pump speed Battery's second highest temperature Temperature, battery's second lowest temperature Minimum battery temperature threshold in heating mode Maximum battery temperature threshold in cooling mode The second lowest battery temperature threshold for activating heating mode under abnormal conditions. The second highest battery temperature threshold for activating cooling mode under abnormal conditions. Battery temperature switching threshold when switching from heating mode to self-circulation mode Battery temperature switching threshold when switching from cooling mode to self-circulation mode Minimum liquid supply temperature threshold for heating mode Maximum liquid supply temperature threshold in cooling mode The supply liquid temperature threshold that triggers the dynamic adjustment of the heating mode of the circulating water pump. The liquid supply temperature threshold that triggers the dynamic adjustment of the cooling mode of the circulating water pump The switching threshold for the liquid supply temperature when switching from heating mode to self-circulation mode. And the liquid supply temperature switching threshold when switching from cooling mode to self-circulation mode. ,

[0022] The process of determining battery temperature is as follows: when At that time, the thermal management system activates the heating mode;

[0023] When the heat management system is operating in heating mode, and At this time, the thermal management system maintains the heating mode;

[0024] when At this time, the thermal management system activates the self-circulation mode;

[0025] when At this time, the thermal management system activates the cooling mode;

[0026] When the thermal management system is operating in cooling mode, and At this time, the thermal management system maintains cooling mode;

[0027] when At this time, the thermal management system activates the self-circulation mode;

[0028] When multiple mode triggering conditions are met simultaneously during the judgment process, the thermal management system controls the execution of the above judgment process according to the priority: "cooling mode > heating mode > self-circulation mode".

[0029] when and When the thermal management system alarms, indicating excessive battery temperature difference or abnormal battery temperature data, the thermal management system will... replace ,Will replace ;when When, the speed of the circulating water pump is dynamically adjusted; when At that time, the speed of the circulating water pump is dynamically adjusted;

[0030] when and When the thermal management system alarms, indicating excessive battery temperature difference or abnormal battery temperature data, the thermal management system will... replace ,Will replace And re-evaluate according to the steps for determining the control mode; when the thermal management system replace And will replace If this occurs more than twice, the thermal management system will still issue an alarm indicating that the battery temperature difference is too large or the battery temperature data is abnormal, prompting maintenance personnel to inspect the energy storage system and switch to judging the liquid supply temperature.

[0031] In the method of this invention, by adjusting the battery temperature and temperature change rate in the thermal management system, the speed of the circulating water pump is dynamically adjusted, effectively avoiding the problem of overheating or underheating of the battery.

[0032] Furthermore, the process of determining the supply temperature is as follows:

[0033] when At that time, the thermal management system activates the heating mode;

[0034] If the thermal management system is operating in heating mode, and At this time, the thermal management system maintains the heating mode;

[0035] when At this time, the thermal management system activates the self-circulation mode;

[0036] when At this time, the thermal management system activates the cooling mode;

[0037] If the thermal management system is operating in cooling mode, and At this time, the thermal management system maintains cooling mode;

[0038] when At this time, the thermal management system activates the self-circulation mode;

[0039] When multiple mode triggering conditions are met simultaneously during the judgment process, the thermal management system controls the execution of the above judgment process according to the priority: "cooling mode > heating mode > self-circulation mode".

[0040] when When, the speed of the circulating water pump is dynamically adjusted; when At that time, the speed of the circulating water pump is dynamically adjusted.

[0041] In the event of a battery temperature sensor malfunction or abnormality, the method of this invention effectively solves the problem of ineffective control of battery temperature by switching to an auxiliary strategy that utilizes the supply liquid temperature for redundant control, thereby achieving dynamic control of the circulating water pump.

[0042] Furthermore, under normal circumstances, the circulating water pump speed control is directly related to the average temperature change rate of the battery, and the corresponding relationship is described by the following expression:

[0043] ;

[0044] in, Set the initial percentage for the circulating water pump speed. The rotational speed corresponding to a gradual change in the average battery temperature. This represents the rotational speed corresponding to a moderate change in the average battery temperature. The rotational speed corresponding to drastic changes in the average battery temperature. This is the rated speed of the circulating water pump. This includes battery temperature data, including the highest battery temperature, the lowest battery temperature, the average battery temperature, and the average battery temperature change rate. , , They are not equal and are all greater than 0 and all less than 100%;

[0045] Under abnormal conditions, the circulating water pump speed control is also related to the rate of change of the supply liquid temperature, and the corresponding relationship is described by the following expression:

[0046] ;

[0047] in, Set the initial percentage for the circulating water pump speed. The rotation speed corresponding to a gradual change in the liquid supply temperature. The rotational speed corresponding to a moderate change in the liquid supply temperature. The rotation speed corresponding to drastic changes in the liquid supply temperature. This is the rated speed of the circulating water pump.

[0048] Furthermore, under normal circumstances, the expression for controlling the speed of the circulating water pump is:

[0049] ;

[0050] in, This is the calculated speed of the circulating water pump. As the first speed control factor, This is the second speed control factor;

[0051] In acquiring Then, limiting control is performed, and the final speed setting value is:

[0052] ;

[0053] Under abnormal conditions, the expression for controlling the speed of the circulating water pump is:

[0054] ;

[0055] in, This is the initial calculated value of the circulating water pump's rotational speed percentage;

[0056] In acquiring Then, limiting control is performed, and the final speed setting value is:

[0057] .

[0058] In a second aspect, the present invention provides a circulating water pump speed control system for an energy storage thermal management system, comprising:

[0059] The data acquisition module is used to collect status parameters from the energy storage battery management system and the thermal management system;

[0060] The data processing module is used to process the data according to the state parameters to obtain the processed data;

[0061] The control mode decision module is used to determine the control mode of the thermal management system based on the processed data by judging the battery temperature and the liquid supply temperature.

[0062] The control execution module is used to dynamically control the speed of the circulating water pump based on the processed data and control mode.

[0063] Thirdly, the present invention provides a computer-readable storage medium having a computer program / instructions stored thereon, which, when executed by a processor, implements the steps of the circulating water pump speed control method for an energy storage thermal management system as described in any of the first aspects.

[0064] Fourthly, the present invention provides a computer device, comprising:

[0065] Memory, used to store computer programs / instructions;

[0066] A processor for executing the computer program / instructions to implement the steps of the circulating water pump speed control method for an energy storage thermal management system as described in any of the first aspects.

[0067] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0068] 1. The circulating water pump speed control method for an energy storage thermal management system provided by this invention obtains data by acquiring battery module temperature, temperature change curve, and liquid supply temperature in real time; performs data processing based on the acquired data to determine the average battery temperature change rate, maximum battery temperature, minimum battery temperature, average battery temperature, liquid supply temperature, and liquid supply temperature change rate, and outputs the processed data; this invention considers battery temperature and temperature change rate, and compared with the traditional method based on single battery temperature extreme value control which has the problem of lag, it has the advantages of short dynamic response time and advanced control of battery temperature control, reducing the risk of battery over-temperature and under-temperature; receives the processed data to determine the control mode of the thermal management system; and realizes dynamic control of the circulating water pump speed according to the control mode and the processed data. Compared with the fixed speed or simple segmented speed control, this invention can reduce the energy consumption of the circulating water pump itself and improve the energy conversion efficiency of the distributed liquid-cooled energy storage system;

[0069] 2. The method of the present invention prioritizes the control of the circulating water pump based on the battery temperature. When the data collected by the battery temperature sensor fails or becomes abnormal, redundant control is then performed based on the liquid supply temperature. This method can further improve the control robustness of the thermal management system.

[0070] 3. The computer-readable storage medium and computer device provided by the present invention can execute the steps of the circulating water pump speed control method for energy storage thermal management system provided by the present invention. Attached Figure Description

[0071] Figure 1 This is an overall flowchart of a circulating water pump speed control method for an energy storage thermal management system provided according to an embodiment of the present invention;

[0072] Figure 2 This is a schematic diagram illustrating the method for controlling the speed of a circulating water pump in an energy storage thermal management system according to an embodiment of the present invention, which determines the operating mode based on battery temperature or supply liquid temperature.

[0073] Figure 3This is a schematic diagram of the circulating water pump speed control method for judging battery temperature in an energy storage thermal management system according to an embodiment of the present invention.

[0074] Figure 4 This is a partially enlarged schematic diagram of the circulating water pump speed control method for judging battery temperature in an energy storage thermal management system according to an embodiment of the present invention.

[0075] Figure 5 This is a schematic diagram of the circulating water pump speed control and battery temperature change rate sensitivity analysis in the circulating water pump speed control method for an energy storage thermal management system provided according to an embodiment of the present invention.

[0076] Figure 6 This is a schematic diagram comparing the energy consumption reduction of the circulating water pump speed control method for an energy storage thermal management system provided according to an embodiment of the present invention with that of a two-stage fixed speed control method.

[0077] Figure 7 This is a partially enlarged schematic diagram of the circulating water pump speed control method for judging the supply liquid temperature, provided by an embodiment of the present invention for a circulating water pump speed control method for an energy storage thermal management system. Detailed Implementation

[0078] It should be noted that:

[0079] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0080] The term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0081] Example 1

[0082] like Figure 1 As shown in the figure, this embodiment introduces a method for controlling the speed of a circulating water pump in an energy storage thermal management system, including:

[0083] Collect status parameters from the energy storage battery management system and thermal management system;

[0084] Based on the state parameters, data processing is performed to obtain the processed data;

[0085] Based on the processed data, the control mode of the thermal management system is determined by judging the battery temperature and the liquid supply temperature.

[0086] Based on the processed data and control mode, the rotational speed of the circulating water pump is dynamically controlled.

[0087] Furthermore, this embodiment operates under normal temperature control conditions. The parameters are set according to a specific type of energy storage system, and are adjusted based on different energy storage systems.

[0088] Furthermore, the status parameters include battery temperature, battery temperature change curve, and electrolyte supply temperature. and the speed of the circulating water pump .

[0089] Furthermore, the processed data includes the battery's highest temperature. Minimum battery temperature Average battery temperature Battery average temperature change rate and the rate of change of liquid supply temperature ;

[0090] The average temperature change rate of the battery This refers to the temperature change difference per unit time, including: when the average battery temperature rises. When the average battery temperature decreases, When the average battery temperature remains constant, ;

[0091] Under normal circumstances, the battery temperature is monitored, and the circulating water pump speed is controlled. There is a connection:

[0092] Will The temperature range is divided into three zones: a range with gradual temperature changes, a range with moderate temperature changes, and a range with drastic temperature changes. These zones are used as the main strategies for regulating the speed of the circulating water pump.

[0093] The temperature variation range is represented as: The moderate temperature variation range is expressed as: The range of drastic temperature changes is represented as ,in , Set a value for the parameter and .

[0094] Furthermore, such as Figure 2 As shown in (a), the control modes in the thermal management system include cooling mode, heating mode, and self-circulation mode. The process of judging the battery temperature is as follows: when At that time, the thermal management system activates the heating mode;

[0095] When the heat management system is operating in heating mode, and At this time, the thermal management system maintains the heating mode;

[0096] when At this time, the thermal management system activates the self-circulation mode;

[0097] when At this time, the thermal management system activates the cooling mode;

[0098] When the thermal management system is operating in cooling mode, and At this time, the thermal management system maintains cooling mode;

[0099] when At that time, the thermal management system activates the self-circulation mode.

[0100] In this embodiment, the parameters are set as follows: , , , , , , , , , When the temperature is set to and At this time, the thermal management system activates the cooling mode;

[0101] In this embodiment, as Figure 3 and Figure 4 As shown, the set temperature change rate ,satisfy This means that the battery temperature is in the range of moderate variation.

[0102] Furthermore, the relationship between the circulating water pump speed control and the average temperature change rate of the battery is described by the following expression:

[0103] ;

[0104] in, Set the initial percentage for the circulating water pump speed. The rotational speed corresponding to a gradual change in the average battery temperature. This represents the rotational speed corresponding to a moderate change in the average battery temperature. The rotational speed corresponding to drastic changes in the average battery temperature. This is the rated speed of the circulating water pump. This includes battery temperature data, including the highest battery temperature, the lowest battery temperature, the average battery temperature, and the average battery temperature change rate.

[0105] In this embodiment, the parameters are calculated as described above. .

[0106] Furthermore, the expression for controlling the speed of the circulating water pump is:

[0107] ;

[0108] in, This is the calculated speed of the circulating water pump. As the first speed control factor, This is the second speed control factor;

[0109] In acquiring Then, limiting control is performed, and the final speed setting value is:

[0110] ;

[0111] In this embodiment, the following settings are provided: ,get The expression for controlling the speed of the circulating water pump is further expressed as:

[0112] ;

[0113] The value range is [0.2, 0.5], and in this embodiment, the value is 0.4. The value range is [0.1, 2], and in this embodiment, the value is 1. The calculated set value of the circulating water pump is... Therefore, the water pump operates at 65% of its rated speed.

[0114] Adjust the rate of temperature change, and set them respectively. , as well as The corresponding speed of the circulating water pump also changed, from Figure 5 It can be seen that the more drastic the battery temperature change, the higher the speed of the circulating water pump, which is more conducive to the battery quickly dissipating or absorbing heat and maintaining the battery temperature within the normal range.

[0115] Furthermore, an energy consumption analysis is performed on the method of this embodiment and the two-stage fixed speed control method. Based on the data given above, the expression for the two-stage fixed speed control is:

[0116] ;

[0117] When the battery temperature is [35℃, 40℃], the degree of energy consumption reduction is defined as follows:

[0118]

[0119] In this embodiment, the parameters are set to , The calculation shows that the setpoint of the circulating water pump is 65%, while the two-stage fixed speed calculation in the comparison method is 100%. According to Table 1, the corresponding energy consumption is 183W and 315W respectively.

[0120] The energy consumption reduction rate corresponding to the method proposed in this invention is as follows:

[0121] Energy consumption reduction degree = ;

[0122] Therefore, it can be seen that the energy consumption of the water pump corresponding to the method of the present invention is reduced by 41.9% compared with the energy consumption of the water pump corresponding to the two-stage fixed speed.

[0123] Table 1 Measured power consumption data of circulating water pumps

[0124]

[0125] The degree of energy consumption reduction of the system is as follows Figure 6 As shown: Within the battery temperature range [30℃, 40℃], the energy consumption of the two methods was compared, and the average temperature change rate of the battery was further analyzed. , as well as Differences in energy consumption over time.

[0126] Example 2

[0127] This embodiment implements control in the event of a battery temperature sensor malfunction or abnormality, relying on the liquid supply temperature for battery temperature control, specifically including:

[0128] Furthermore, the status parameters include battery temperature, battery temperature change curve, and electrolyte supply temperature. and the speed of the circulating water pump .

[0129] Furthermore, the processed data includes the battery's highest temperature. Minimum battery temperature Average battery temperature Battery average temperature change rate and the rate of change of liquid supply temperature ;

[0130] Liquid supply temperature change rate This refers to the temperature change difference per unit time, including: when the supply liquid temperature increases. When the supply liquid temperature decreases, When the supply temperature remains constant, ;

[0131] In abnormal situations, the supply liquid temperature is assessed, and the circulating water pump speed is controlled. There is a connection:

[0132] Will The temperature is divided into three ranges: a range with a gradual change in the supply temperature, a range with a moderate change in the temperature, and a range with a drastic change in the temperature. These ranges are used as auxiliary strategies for controlling the speed of the circulating water pump.

[0133] The range of gradual temperature variation in the liquid supply is represented as follows: The moderate temperature variation range is expressed as: The range of drastic temperature changes is represented as ,in , Set a value for the parameter and .

[0134] Furthermore, such as Figure 2 As shown in (b), the process for determining the liquid supply temperature is as follows:

[0135] when At that time, the thermal management system activates the heating mode;

[0136] If the thermal management system is operating in heating mode, and At this time, the thermal management system maintains the heating mode;

[0137] when At this time, the thermal management system activates the self-circulation mode;

[0138] when At that time, the thermal management system activates the cooling mode.

[0139] In this embodiment, the parameters are set as follows: , , , , , , , , , , , When the supply temperature At that time, the thermal management system activates the cooling mode.

[0140] In this embodiment, the set liquid supply temperature change rate ,satisfy This means that it is in a range of drastic temperature changes.

[0141] Furthermore, the relationship between the circulating water pump speed control and the rate of change of the supply liquid temperature is described by the following expression:

[0142] ;

[0143] in, Set the initial percentage for the circulating water pump speed. The rotation speed corresponding to a gradual change in the liquid supply temperature. The rotational speed corresponding to a moderate change in the liquid supply temperature. The rotation speed corresponding to drastic changes in the liquid supply temperature. This is the rated speed of the circulating water pump.

[0144] In this embodiment, the parameters are calculated as described above. .

[0145] Furthermore, the expression for controlling the speed of the circulating water pump is:

[0146] ;

[0147] in, This is the initial calculated value of the circulating water pump's rotational speed percentage;

[0148] In acquiring Then, limiting control is performed, and the final speed setting value is:

[0149] .

[0150] In this embodiment, as Figure 7 As shown, settings ,get The expression for controlling the speed of the circulating water pump is further expressed as:

[0151] ;

[0152] The calculated set value of the circulating water pump is Therefore, the water pump operates at 85% of its rated speed. As can be seen from the magnified curve, when... and At that time, the corresponding circulating water pump speed setting value is approximately 85% of the rated value;

[0153] Adjust the rate of change of the supply liquid temperature, and set it to... , as well as Sensitivity analysis was conducted, and the corresponding setpoints for the circulating water pump speed changed accordingly under different rates of change.

[0154] Example 3

[0155] Based on the circulating water pump speed control method for an energy storage thermal management system described in Example 1, this example introduces a circulating water pump speed control system for an energy storage thermal management system, comprising:

[0156] The data acquisition module is used to collect status parameters in the energy storage thermal management system;

[0157] The data processing module is used to process the data according to the state parameters to obtain the processed data;

[0158] The control mode decision module is used to determine the control mode of the thermal management system based on the processed data by judging the battery temperature and the liquid supply temperature.

[0159] The control execution module is used to dynamically control the speed of the circulating water pump based on the processed data and control mode.

[0160] Example 4

[0161] Based on the circulating water pump speed control method for an energy storage thermal management system described in Embodiment 1, this embodiment introduces a computer-readable storage medium storing a computer program / instruction thereon. When the computer program / instruction is executed by a processor, it implements the steps of the circulating water pump speed control method for an energy storage thermal management system as described in any of Embodiment 1.

[0162] Example 5

[0163] Based on the circulating water pump speed control method for an energy storage thermal management system described in Embodiment 1, this embodiment provides a computer device, including:

[0164] Memory, used to store computer programs / instructions;

[0165] A processor is configured to execute the computer program / instructions to implement the steps of the circulating water pump speed control method for an energy storage thermal management system as described in any one of Embodiments 1.

[0166] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0167] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0168] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0169] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0170] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A method for controlling the speed of a circulating water pump in an energy storage thermal management system, characterized in that, include: Collect status parameters from the energy storage battery management system and thermal management system; Based on the state parameters, data processing is performed to obtain the processed data; Based on the processed data, the control mode of the thermal management system is determined by judging the battery temperature and the liquid supply temperature. Based on the processed data and control mode, the rotational speed of the circulating water pump is dynamically controlled.

2. The circulating water pump speed control method for an energy storage thermal management system according to claim 1, characterized in that, The status parameters include battery temperature, battery temperature change curve, liquid supply temperature, and circulating water pump speed.

3. The circulating water pump speed control method for an energy storage thermal management system according to claim 1, characterized in that, The processed data includes the battery's highest temperature, lowest temperature, average temperature, average temperature change rate, and electrolyte supply temperature change rate. The average battery temperature change rate is the difference in battery temperature change per unit time, including: when the average battery temperature increases, the average battery temperature change rate is greater than 0; when the average battery temperature decreases, the average battery temperature change rate is less than 0; when the average battery temperature remains unchanged, the average battery temperature change rate is equal to 0. Under normal circumstances, the control of the circulating water pump speed is related to the battery's average temperature change rate when judging the battery temperature. The average temperature change rate of the battery is divided into three ranges: a range of gradual temperature change, a range of moderate temperature change, and a range of drastic temperature change, which are used as the main strategies for regulating the speed of the circulating water pump. The rate of change of the supply temperature is the difference in supply temperature change per unit time, including: when the supply temperature increases, the rate of change of the supply temperature is greater than 0; when the supply temperature decreases, the rate of change of the supply temperature is less than 0; when the supply temperature remains unchanged, the rate of change of the supply temperature is equal to 0. In abnormal situations, the supply liquid temperature is assessed, and the circulating water pump speed control is related to the rate of change of the supply liquid temperature. The rate of change of the supply liquid temperature is divided into three ranges: a range of gradual temperature change, a range of moderate temperature change, and a range of drastic temperature change, which are used as an auxiliary strategy for controlling the speed of the circulating water pump.

4. The circulating water pump speed control method for an energy storage thermal management system according to claim 1, characterized in that, The control modes in the thermal management system include cooling mode, heating mode and self-circulation mode. The process of judging the battery temperature is as follows: when the lowest battery temperature is lower than the lowest battery temperature threshold of the heating mode, the thermal management system starts the heating mode. When the thermal management system is operating in heating mode, and the lowest battery temperature is greater than or equal to the lowest battery temperature threshold of heating mode, but less than the battery temperature switching threshold for switching from heating mode to self-circulation mode, the thermal management system maintains heating mode. When the lowest battery temperature is greater than or equal to the battery temperature switching threshold for switching from heating mode to self-circulation mode, the thermal management system starts the self-circulation mode. When the highest battery temperature exceeds the highest battery temperature threshold of the cooling mode, the thermal management system activates the cooling mode. When the thermal management system is operating in cooling mode, and the highest battery temperature is greater than or equal to the battery temperature switching threshold for switching from cooling mode to self-circulation mode, but less than the highest battery temperature threshold for cooling mode, the thermal management system maintains cooling mode. When the highest battery temperature is less than or equal to the battery temperature switching threshold for switching from cooling mode to self-circulation mode, the thermal management system starts the self-circulation mode. When multiple mode triggering conditions are met simultaneously during the judgment process, the thermal management system controls the execution of the above judgment process according to the priority: "cooling mode > heating mode > self-circulation mode". When the battery's highest temperature exceeds the maximum battery temperature threshold in cooling mode and the battery's lowest temperature is less than the minimum battery temperature threshold in heating mode, the thermal management system alarms to indicate that the battery temperature difference is too large or the battery temperature data is abnormal. The system then replaces the maximum battery temperature with the second-highest battery temperature and the minimum battery temperature with the second-lowest battery temperature. When the battery's lowest temperature is less than the second-lowest battery temperature threshold for activating heating mode under abnormal conditions, the circulating water pump speed is dynamically adjusted. When the battery's highest temperature exceeds the second-highest battery temperature threshold for activating cooling mode under abnormal conditions, the circulating water pump speed is also dynamically adjusted. When the battery's highest temperature exceeds the second-highest battery temperature threshold for activating cooling mode under abnormal conditions, and the battery's lowest temperature is less than the second-lowest battery temperature threshold for activating heating mode under abnormal conditions, the thermal management system alarms, indicating that the battery temperature difference is too large or the battery temperature data is abnormal. The thermal management system replaces the battery's highest temperature with its second-highest battery temperature and the battery's lowest temperature with its second-lowest battery temperature, and then re-evaluates the situation according to the steps for determining the control mode. If the thermal management system replaces the battery's highest temperature with its second-highest battery temperature, and this replacement occurs more than a set number of times, the thermal management system still alarms, indicating that the battery temperature difference is too large or the battery temperature data is abnormal. This prompts maintenance personnel to inspect the energy storage system and switch the system to assess the liquid supply temperature.

5. The circulating water pump speed control method for an energy storage thermal management system according to claim 4, characterized in that, The process of determining the liquid supply temperature is as follows: When the liquid supply temperature is lower than the minimum liquid supply temperature threshold of the heating mode, the thermal management system starts the heating mode. If the thermal management system is operating in heating mode, and the liquid supply temperature is greater than or equal to the minimum liquid supply temperature threshold of the heating mode and less than the liquid supply temperature switching threshold for switching from heating mode to self-circulation mode, the thermal management system will maintain the heating mode. When the liquid supply temperature is greater than or equal to the liquid supply temperature switching threshold for switching from heating mode to self-circulation mode, the thermal management system starts the self-circulation mode. When the liquid supply temperature exceeds the maximum liquid supply temperature threshold of the cooling mode, the thermal management system activates the cooling mode. If the thermal management system is operating in cooling mode, and the liquid supply temperature is greater than or equal to the liquid supply temperature switching threshold for switching from cooling mode to self-circulation, and less than the maximum liquid supply temperature threshold for cooling mode, the thermal management system will maintain cooling mode. When the liquid supply temperature is less than or equal to the liquid supply temperature switching threshold for switching from cooling mode to self-circulation mode, the thermal management system starts the self-circulation mode. When multiple mode triggering conditions are met simultaneously during the judgment process, the thermal management system controls the execution of the above judgment process according to the priority: "cooling mode > heating mode > self-circulation mode". When the supply liquid temperature is lower than the supply liquid temperature threshold of the heating mode under the dynamic adjustment of the circulating water pump, the speed of the circulating water pump is dynamically adjusted; when the supply liquid temperature is higher than the supply liquid temperature threshold of the cooling mode under the dynamic adjustment of the circulating water pump, the speed of the circulating water pump is dynamically adjusted.

6. The circulating water pump speed control method for an energy storage thermal management system according to claim 3, characterized in that, Under normal circumstances, the circulating water pump speed control is directly related to the average temperature change rate of the battery, and the corresponding relationship is described by the following expression: ； in, Set the initial percentage for the circulating water pump speed. The rotational speed corresponding to a gradual change in the average battery temperature. This represents the rotational speed corresponding to a moderate change in the average battery temperature. The rotational speed corresponding to drastic changes in the average battery temperature. This is the rated speed of the circulating water pump. This includes battery temperature data, including the highest battery temperature, the lowest battery temperature, the average battery temperature, and the average battery temperature change rate. The average temperature change rate of the battery; Set a value for the parameter; Under abnormal conditions, the circulating water pump speed control is also related to the rate of change of the supply liquid temperature, and the corresponding relationship is described by the following expression: ； in, Set the initial percentage for the circulating water pump speed. The rotation speed corresponding to a gradual change in the liquid supply temperature. The rotational speed corresponding to a moderate change in the liquid supply temperature. The rotation speed corresponding to drastic changes in the liquid supply temperature. This is the rated speed of the circulating water pump. For the liquid supply temperature; The rate of change of the supply liquid temperature; , Set a value for the parameter.

7. The circulating water pump speed control method for an energy storage thermal management system according to claim 6, characterized in that, Under normal circumstances, the expression for controlling the speed of the circulating water pump is: ； in, This is the calculated speed of the circulating water pump. As the first speed control factor, This is the second speed control factor; This is the highest temperature of the battery. This is the lowest battery temperature. This refers to the minimum battery temperature threshold in heating mode. This represents the maximum battery temperature threshold in cooling mode. This is the second lowest battery temperature threshold for activating heating mode under abnormal conditions. This is the second highest battery temperature threshold for activating cooling mode under abnormal conditions; In acquiring Then, limiting control is performed, and the final speed setting value is: ； Under abnormal conditions, the expression for controlling the speed of the circulating water pump is: ； in, This is the initial calculated value of the circulating water pump's rotational speed percentage; This is the minimum liquid supply temperature threshold for heating mode. The maximum liquid supply temperature threshold for cooling mode; The liquid supply temperature threshold that triggers the dynamic adjustment of the heating mode of the circulating water pump; The liquid supply temperature threshold that triggers the dynamic adjustment of the cooling mode of the circulating water pump; In acquiring Then, limiting control is performed, and the final speed setting value is: 。 8. A circulating water pump speed control system for an energy storage thermal management system, characterized in that, include: The data acquisition module is used to collect status parameters from the energy storage battery management system and the thermal management system; The data processing module is used to process the data according to the state parameters to obtain the processed data; The control mode decision module is used to determine the control mode of the thermal management system based on the processed data by judging the battery temperature and the liquid supply temperature. The control execution module is used to dynamically control the speed of the circulating water pump based on the processed data and control mode.

9. A computer-readable storage medium having a computer program / instructions stored thereon, characterized in that, When the computer program / instruction is executed by the processor, it implements the steps of the circulating water pump speed control method for an energy storage thermal management system as described in any one of claims 1 to 7.

10. A computer device / equipment / system, characterized in that, include: Memory, used to store computer programs / instructions; A processor for executing the computer program / instructions to implement the steps of the circulating water pump speed control method for an energy storage thermal management system as described in any one of claims 1 to 7.

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