A method for detecting antifreeze performance of antifreeze fluid for new energy vehicles

Abstract

The present application discloses a method for detecting the antifreeze performance of antifreeze for new energy vehicles. The antifreeze detection equipment is used to simulate the cooling process of the antifreeze on the battery under relatively harsh conditions from the aspects of the battery structure and charging environment of the new energy vehicle, so as to detect whether the performance of the antifreeze during the charging process meets the relevant requirements of the antifreeze performance. The performance of the antifreeze involves many indicators. The present application uses viscosity as a representative to detect the changes of the antifreeze in the charging environment to evaluate the stability of the antifreeze. In addition, the charging process simulated in the present application also includes three stages: heating, constant temperature, and cooling, so as to detect the performance of the antifreeze in a more detailed and comprehensive manner.

Description

Technical Field

[0001] The present application relates to the field of detection and data processing technology, and in particular to a method for detecting the antifreeze performance of antifreeze fluid for new energy vehicles. Background Art

[0002] Electric vehicles and fuel vehicles differ in the use of antifreeze. The antifreeze of electric vehicles is mainly used to cool the motor, and at the same time help the electrical battery dissipate heat. Even the air conditioning heater depends on the temperature of the antifreeze. In particular, during the charging process of the battery, antifreeze is also needed to assist the battery in not heating up too quickly. Among the spontaneous combustion accidents of new energy vehicles, the proportion that occurs during the charging process cannot be underestimated. Moreover, the charging of new energy vehicles is mostly carried out in parking lots and charging sites. If a spontaneous combustion accident occurs, it may cause great losses. In related technologies, the performance of antifreeze is mostly characterized by indicators such as fluidity and viscosity. These performance indicators meet the relevant standards and are qualified. As for whether these indicators will change during the charging process, it is not considered.

[0003] How to conduct targeted testing on the heat dissipation performance of antifreeze during the charging process of new energy vehicles has become an urgent problem to be solved. Summary of the invention

[0004] The embodiment of the present application provides a method for detecting the antifreeze performance of antifreeze fluid for new energy vehicles, so as to at least partially solve the above-mentioned technical problems.

[0005] The present application embodiment adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a method for detecting the antifreeze performance of antifreeze liquid in a new energy vehicle. The method is based on an antifreeze liquid detection device, wherein the antifreeze liquid detection device comprises a pipeline, a cooling grid, a temperature rise simulation unit, and a detection control unit connected to the temperature rise simulation unit; the temperature rise simulation unit is arranged in a gap of the cooling grid; the pipeline is laid in the cooling grid for the antifreeze liquid to flow; the gap between the cooling grid and the pipeline is filled with a heat transfer medium; the method comprises:

[0007] Inject the antifreeze solution into the pipeline at room temperature so that the antifreeze solution circulates in the pipeline, and use the detected viscosity of the antifreeze solution as a reference viscosity;

[0008] The detected viscosity of the antifreeze liquid in the first stage is used as the first viscosity; the first stage is a stage of controlling the temperature of the temperature rise simulation unit to increase to a preset first temperature at a preset temperature rise rate;

[0009] The detected viscosity of the antifreeze solution in the second stage is used as the second viscosity; the second stage is a stage of controlling the temperature of the temperature rise simulation unit to be constant at the first temperature;

[0010] The viscosity of the antifreeze liquid detected in the third stage is used as the third viscosity; the third stage is a stage of controlling the temperature of the temperature rise simulation unit to drop to room temperature at a preset temperature drop rate; the temperature drop rate is smaller than the temperature rise rate;

[0011] Determine a first weight value according to a difference between the reference viscosity and an average value of the standard viscosity range, so that the first weight value is positively correlated with the difference, negatively correlated with a difference between the room temperature and the ambient temperature corresponding to the standard viscosity range during detection, positively correlated with the heating rate, and negatively correlated with a duration in the second stage;

[0012] When the reference viscosity, the first viscosity, the second viscosity, and the third viscosity are all within the standard viscosity range, at least one of them is weighted by the first weight value. If the result obtained after weighting is still within the standard viscosity range, the detection result of the antifreeze liquid is determined to be qualified.

[0013] In an optional embodiment of this specification, the method further includes:

[0014] When at least one of the reference viscosity, the first viscosity, the second viscosity, and the third viscosity is not within the standard viscosity range, it is determined that the detection result of the antifreeze liquid is unqualified.

[0015] In an optional embodiment of this specification, the method further includes:

[0016] The pipeline includes a primary pipeline and a secondary pipeline that are connected, and the antifreeze liquid flows from the primary pipeline into the secondary pipeline; the primary pipeline includes a plurality of bends with angles greater than 90 degrees, and the secondary pipeline is a straight pipeline; the viscosity detection device for measuring viscosity includes: a first detection device arranged at the end of the primary pipeline, a second detection device arranged in the middle of the secondary pipeline, and a third detection device arranged at the end of the secondary pipeline; the first viscosity, the second viscosity, and the third viscosity are all obtained based on data collected by the viscosity detection device.

[0017] In an optional embodiment of this specification, the method further includes:

[0018] The first viscosity, the second viscosity, and the third viscosity are all average values ​​of data collected by the viscosity detection device; the first viscosity is obtained by reference to the viscosity obtained by the data collected by the first detection device.

[0019] In an optional embodiment of this specification, the method further includes:

[0020] The second viscosity is obtained from data collected by the first detection device.

[0021] In an optional embodiment of this specification, the method further includes:

[0022] The third viscosity is obtained from data collected by the first detection device; or

[0023] The third viscosity is the larger of the data collected by the first detection device, the second detection device, and the third detection device.

[0024] In an optional embodiment of this specification, the method further includes:

[0025] The first temperature is at least 20 degrees Celsius higher than the room temperature and not less than 50 degrees Celsius.

[0026] In an optional embodiment of this specification, the method further includes:

[0027] The difference between the temperature collected by the first temperature sensor in the first stage and the temperature of the temperature rise simulation unit when collecting the temperature is used as the second weight value; the first temperature sensor is arranged at the end of the first-level pipeline; the length of the first-level pipeline is greater than the length of the second-level pipeline;

[0028] If the second weight value is less than a preset weight value threshold, weighting based on the first weight value is performed; the weight value threshold is positively correlated with the heating rate, negatively correlated with the length of the primary pipeline, and negatively correlated with the maximum value of the difference between the data collected by the first temperature sensor and the second temperature sensor at the same time; the second temperature sensor is arranged at the end of the secondary pipeline;

[0029] If the second weight value is not less than the weight value threshold, it is determined that the detection result of the antifreeze liquid is unqualified.

[0030] In an optional embodiment of this specification, the method further includes:

[0031] When a result obtained after weighting based on the first weight value is still within the standard viscosity range, increasing the heating rate and re-determining the first weight value;

[0032] If the result obtained after weighting based on the re-determined first weight value is still within the standard viscosity range, it is determined that the detection result of the antifreeze liquid is qualified.

[0033] In a second aspect, an embodiment of the present application further provides an electronic device, including:

[0034] Processor; and

[0035] A memory arranged to store computer executable instructions which, when executed, cause the processor to perform the method steps described in the first aspect.

[0036] In a third aspect, an embodiment of the present application further provides a computer-readable storage medium, which stores one or more programs. When the one or more programs are executed by an electronic device including multiple applications, the electronic device executes the method steps described in the first aspect.

[0037] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0038] This application uses antifreeze testing equipment to simulate the cooling process of the battery by antifreeze under relatively harsh conditions from the aspects of the battery structure and charging environment of new energy vehicles, so as to detect whether the performance of the antifreeze during the charging process meets the relevant requirements of antifreeze performance. The performance of antifreeze involves many indicators. This application uses viscosity as a representative to detect the changes of antifreeze in the charging environment to evaluate the stability of the antifreeze. In addition, the charging process simulated in this application also includes three stages: heating, constant temperature, and cooling, so as to detect the performance of the antifreeze in a more detailed and comprehensive manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0040] Figure 1 A schematic diagram of a process for detecting the antifreeze performance of antifreeze fluid for new energy vehicles provided in an embodiment of this specification;

[0041] Figure 2 This is a schematic diagram of the structure of the antifreeze liquid detection device in the embodiment of this specification;

[0042] Figure 3 It is a schematic diagram of the structure of an electronic device in an embodiment of this specification. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, and this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0044] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0045] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0046] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0047] like Figure 1 As shown, the antifreeze performance detection method of the new energy vehicle antifreeze fluid in this manual includes the following steps:

[0048] S100: Inject the antifreeze liquid into the pipeline at room temperature so that the antifreeze liquid circulates in the pipeline, and use the detected viscosity of the antifreeze liquid as a reference viscosity.

[0049] The method in this specification is based on an antifreeze detection device. The antifreeze detection device is used to simulate the structure of the battery of a new energy vehicle and the charging environment under relatively harsh conditions. The antifreeze detection device comprises a pipeline, a cooling grid, a temperature rise simulation unit, and a detection control unit connected to the temperature rise simulation unit; the temperature rise simulation unit is arranged in the gap of the cooling grid; the pipeline is laid in the cooling grid for the antifreeze to flow; the gap between the cooling grid and the pipeline is filled with a heat transfer medium, such as Figure 2The method in this specification can be executed by a detection control unit.

[0050] During the antifreeze performance test, the temperature rise simulation unit generates heat, and the heat transfer medium vaporizes due to the heat, so that the heat generated by the temperature rise simulation unit is dispersed in the gap between the cooling grid and the pipeline, so that the antifreeze in the pipeline can be heated up under the action of heat.

[0051] In the related art, technical means that can be used to achieve viscosity detection are applicable to this specification when conditions permit.

[0052] There are many performance indicators for antifreeze, for example, there are corresponding specifications in the national standard GB 29743-2013 "Motor Vehicle Engine Coolant". However, the working methods of fuel vehicles and new energy vehicles are different, and antifreeze that meets the needs of fuel vehicles may not work well on new energy vehicles. Moreover, the structure of the antifreeze storage device provided by fuel vehicles is different from that provided by new energy vehicles, and the structure of the device will also affect the performance of the antifreeze.

[0053] Normally, the viscosity of the antifreeze liquid is not tested in a device that simulates a charging environment. Therefore, it is possible that the antifreeze liquid that passes the test under normal conditions fails the test under a simulated charging environment. In an optional embodiment of the present specification, if the reference viscosity is not within the standard viscosity range, the test result of the antifreeze liquid is directly determined to be unqualified.

[0054] S102: The detected viscosity of the antifreeze solution in the first stage is used as the first viscosity.

[0055] The first stage is a stage of controlling the temperature of the temperature rise simulation unit to increase to a preset first temperature at a preset temperature rise rate. The temperature rise simulation unit is used to simulate battery heating and may be an electric heating tube.

[0056] The first temperature is the highest temperature in the simulated battery charging process. Based on the characteristics of the battery in the relevant technology, in an optional embodiment of the present specification, the first temperature is at least 20 degrees Celsius higher than the room temperature and not less than 50 degrees Celsius.

[0057] If the antifreeze performs well during the temperature rise process, it means that it can effectively cool the battery during the temperature rise process.

[0058] S104: The detected viscosity of the antifreeze liquid in the second stage is used as the second viscosity.

[0059] The second stage is a stage of controlling the temperature of the temperature rise simulation unit to be constant at the first temperature. If the antifreeze performs well during the temperature rise process, it indicates that it has good antifreeze performance stability and can effectively cool the battery during the constant temperature process. As we all know, the viscosity determines the flow properties of the antifreeze to a certain extent. The lower the viscosity of the antifreeze, the better. The longer the time at a higher temperature, the greater the risk of the stability of the antifreeze being destroyed. In order to verify this stability, in an optional embodiment of the present specification, the duration of the second stage is 2 to 6 hours.

[0060] S106: The detected viscosity of the antifreeze solution in the third stage is used as the third viscosity.

[0061] The third stage is a stage in which the temperature of the temperature rise simulation unit is controlled to drop to room temperature at a preset cooling rate. The cooling rate is smaller than the heating rate. The battery charging is accompanied by a gradual cooling process. The third stage simulates this process more harshly by using a smaller cooling rate to express the situation in which the environment of the new energy vehicle (e.g., poor indoor ventilation and high ambient temperature) is not conducive to cooling.

[0062] S108: Determine a first weight value according to a difference between the reference viscosity and an average value of a standard viscosity range.

[0063] The first weight value in this specification is used to characterize the risk of failure or instability of the antifreeze in the harsh charging environment. The first weight value is positively correlated with the difference (the greater the deviation, the greater the hidden danger), negatively correlated with the difference between the room temperature and the ambient temperature during the test corresponding to the standard viscosity range (to reduce the deviation caused by the negative impact of environmental factors, and this deviation is not largely caused by the performance of the antifreeze), positively correlated with the heating rate (the possibility of risk accidents caused by the heating process, such as fire, is greater and should be taken seriously), and negatively correlated with the duration of the second stage (the longer the duration, the more serious the hidden danger of the risk accident, and the responsibility of the battery's own performance cannot be ruled out). The first weight value is a number between 0 and 1, which can be determined in combination with expert experience.

[0064] S110: When the reference viscosity, the first viscosity, the second viscosity, and the third viscosity are all within the standard viscosity range, at least one of them is weighted by the first weight value. If the result obtained after weighting is still within the standard viscosity range, it is determined that the detection result of the antifreeze liquid is qualified.

[0065] In an optional embodiment of the present specification, when at least one of the reference viscosity, the first viscosity, the second viscosity, and the third viscosity is not within the standard viscosity range, the detection result of the antifreeze liquid is determined to be unqualified.

[0066] Since the reference viscosity detection environment is the closest to the normal detection environment, the first weight value determined based on the reference viscosity can clearly characterize the impact of the difference in the use environment of antifreeze compared to fuel vehicles on the performance of antifreeze. The viscosity detected at each stage can reflect the performance of the antifreeze itself. The superposition of the two results can simultaneously show the impact of the use environment and the antifreeze itself.

[0067] This application uses antifreeze testing equipment to simulate the cooling process of the battery by antifreeze under relatively harsh conditions from the aspects of the battery structure and charging environment of new energy vehicles, so as to detect whether the performance of the antifreeze during the charging process meets the relevant requirements of antifreeze performance. The performance of antifreeze involves many indicators. This application uses viscosity as a representative to detect the changes of antifreeze in the charging environment to evaluate the stability of the antifreeze. In addition, the charging process simulated in this application also includes three stages: heating, constant temperature, and cooling, so as to detect the performance of the antifreeze in a more detailed and comprehensive manner.

[0068] The method in this specification is implemented on the basis of a relatively harsh simulation of the charging environment and the battery structure. In an optional embodiment of this specification, the structure of the pipeline for the flow of antifreeze provided by the battery structure is simulated to be relatively unsuitable for flow. In this embodiment, the pipeline includes a primary pipeline and a secondary pipeline connected to each other, and the antifreeze flows from the primary pipeline to the secondary pipeline; the primary pipeline includes a plurality of bending angles greater than 90 degrees, and the secondary pipeline is a straight pipeline. The bent pipeline is not suitable for liquid flow. When the liquid flows through the bent pipeline, turbulence is prone to occur. The turbulence destroys the steady state of the fluid, resulting in a negative impact on heat conduction. In addition, the bent pipeline will increase the hidden danger of bubbles precipitating from the liquid flowing through, further affecting the absorption of heat dissipated by the antifreeze to the battery. However, in actual applications, the battery is usually not designed specifically to match the performance of the antifreeze, that is, complex and harsh pipeline environments are inevitable in some cases.

[0069] Therefore, in this embodiment, the difference between the temperature collected by the first temperature sensor in the first stage and the temperature of the temperature rise simulation unit when performing the collection is used as the second weight value (the second weight value can characterize the degree of negative impact of the battery structure on the heat absorption capacity of the antifreeze to a certain extent); the first temperature sensor is arranged at the end of the primary pipeline; the length of the primary pipeline is greater than the length of the secondary pipeline (the longer design of the primary pipeline can accumulate the negative impact caused by the pipeline structure, which is easier to identify).

[0070] If the second weight value is less than the preset weight value threshold (indicating that the negative impact of heat conduction caused by the battery structure is within an acceptable range), weighting based on the first weight value is performed. The weight value threshold is positively correlated with the heating rate (the temperature detection occurs in the first stage. Normally, a rapid temperature rise will lead to low instantaneous heat conduction efficiency, which is not entirely caused by the antifreeze performance), negatively correlated with the length of the primary pipeline (coordinated with the cumulative effect of the pipeline on the negative impact, so as to more sensitively identify this negative impact), and negatively correlated with the maximum value of the difference between the data collected by the first temperature sensor and the second temperature sensor at the same time (the difference indicates the degree to which the negative impact dissipates as the flow gradually stabilizes. The method in this specification can more sensitively identify the efficiency of the dissipation of this negative impact); the second temperature sensor is set at the end of the secondary pipeline. If the second weight value is not less than the weight value threshold, the antifreeze test result is determined to be unqualified.

[0071] In addition, the design of the pipeline may also affect the viscosity of the antifreeze. For example, the antiscalant in the antifreeze may precipitate in the unsteady flow caused by turbulence, which will lead to changes in viscosity. Especially when the temperature is higher than room temperature, the degree of this change is worthy of attention. In other words, viscosity can not only characterize the flow properties of the antifreeze and its impact on heat transfer efficiency, but also characterize the stability changes of the antifreeze.

[0072] The viscosity detection device for measuring viscosity includes: a first detection device arranged at the end of the primary pipeline, a second detection device arranged in the middle of the secondary pipeline, and a third detection device arranged at the end of the secondary pipeline (optionally, the first detection device, the second detection device and the third detection device have the same specifications). The first viscosity, the second viscosity, and the third viscosity are all obtained based on the data collected by the viscosity detection device.

[0073] In an optional embodiment of the present specification, the first viscosity, the second viscosity, and the third viscosity are all average values ​​of data collected by the viscosity detection device, so as to comprehensively characterize the comprehensive influence of the test conditions on the viscosity.

[0074] In another optional embodiment of the present specification, the second viscosity is obtained from data collected by the first detection device. The data collected by the first detection device can effectively superimpose the effects caused by temperature and pipeline structure.

[0075] In another optional embodiment of the present specification, the third viscosity is obtained from the data collected by the first detection device. During the cooling process, the heat dissipation of the bent pipe is slow. In order to simulate the situation of poor heat dissipation conditions, the data collected by the first detection device is used as the third viscosity. In addition, the third viscosity is the larger of the data collected by the first detection device, the second detection device, and the third detection device, so that the third viscosity can reflect the superposition of various negative effects in a long-term high temperature environment.

[0076] With the development of battery technology and the improvement of charging efficiency, the heating of batteries is also more rapid, which increases the requirements for the heat dissipation efficiency of antifreeze. In order to detect the heat dissipation effect of antifreeze on batteries with different charging efficiencies, in an optional embodiment of the present specification, when the result obtained after weighting based on the first weight value is still within the standard viscosity range, the heating rate is increased and the first weight value is re-determined. If the result obtained after weighting based on the re-determined first weight value is still within the standard viscosity range, the detection result of the antifreeze is determined to be qualified.

[0077] In a further optional embodiment of the present specification, in addition to adjusting the heating rate to further test the antifreeze performance of the antifreeze liquid, the first temperature is also increased to a second temperature and tested again.

[0078] Figure 3 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present application. Figure 3 At the hardware level, the electronic device includes a processor, and optionally also includes an internal bus, a network interface, and a memory. The memory may include a memory, such as a high-speed random access memory (RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk storage. Of course, the electronic device may also include hardware required for other services.

[0079] The processor, network interface and memory can be interconnected through an internal bus, which can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0080] The memory is used to store the program. Specifically, the program may include a program code, and the program code includes a computer operation instruction. The memory may include a memory and a non-volatile memory, and provides instructions and data to the processor.

[0081] The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it, forming a new energy vehicle antifreeze performance detection device at the logical level. The processor executes the program stored in the memory and is specifically used to execute any of the above-mentioned new energy vehicle antifreeze performance detection methods.

[0082] The above application Figure 1The antifreeze performance detection method of antifreeze fluid for new energy vehicles disclosed in the illustrated embodiment can be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software. The above processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0083] The electronic device may also perform Figure 1 A new energy vehicle antifreeze performance detection method for antifreeze fluid Figure 1 The functions of the illustrated embodiment will not be described in detail in the embodiments of the present application.

[0084] An embodiment of the present application also proposes a computer-readable storage medium, which stores one or more programs, and the one or more programs include instructions. When the instructions are executed by an electronic device including multiple application programs, any one of the aforementioned methods for detecting the antifreeze performance of antifreeze fluid for new energy vehicles is executed.

[0085] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0086] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0087] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0088] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0089] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0090] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0091] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0092] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0093] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0094] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method for detecting the antifreeze performance of antifreeze fluid for new energy vehicles, It is characterized in that The method is based on an antifreeze detection device, which includes a pipeline, a cooling grid, a temperature rise simulation unit, and a detection control unit connected to the temperature rise simulation unit; the temperature rise simulation unit is arranged in the gap of the cooling grid; the pipeline is laid in the cooling grid for antifreeze to flow; the gap between the cooling grid and the pipeline is filled with a heat transfer medium; the method includes: Inject the antifreeze solution into the pipeline at room temperature so that the antifreeze solution circulates in the pipeline, and use the detected viscosity of the antifreeze solution as a reference viscosity; The detected viscosity of the antifreeze liquid in the first stage is used as the first viscosity; the first stage is a stage of controlling the temperature of the temperature rise simulation unit to increase to a preset first temperature at a preset temperature rise rate; The detected viscosity of the antifreeze solution in the second stage is used as the second viscosity; the second stage is a stage of controlling the temperature of the temperature rise simulation unit to be constant at the first temperature; The viscosity of the antifreeze liquid detected in the third stage is used as the third viscosity; the third stage is a stage of controlling the temperature of the temperature rise simulation unit to drop to room temperature at a preset temperature drop rate; the temperature drop rate is smaller than the temperature rise rate; According to the difference between the reference viscosity and the average value of the standard viscosity range, a first weight value is determined, so that the first weight value is positively correlated with the difference, negatively correlated with the difference between the room temperature and the ambient temperature corresponding to the standard viscosity range during the detection, positively correlated with the heating rate, and negatively correlated with the duration of being in the second stage; wherein the first weight value is a number between 0 and 1, determined in combination with expert experience; When the reference viscosity, the first viscosity, the second viscosity, and the third viscosity are all within the standard viscosity range, at least one of them is weighted by the first weight value, and if the result obtained after weighting is still within the standard viscosity range, the test result of the antifreeze liquid is determined to be qualified; The method further comprises: When at least one of the reference viscosity, the first viscosity, the second viscosity, and the third viscosity is not within the standard viscosity range, it is determined that the detection result of the antifreeze liquid is unqualified.

2. The method according to claim 1, It is characterized in that The method further comprises: The pipeline includes a primary pipeline and a secondary pipeline that are connected, and the antifreeze liquid flows from the primary pipeline into the secondary pipeline; the primary pipeline includes a plurality of bends with angles greater than 90 degrees, and the secondary pipeline is a straight pipeline; the viscosity detection device for measuring viscosity includes: a first detection device arranged at the end of the primary pipeline, a second detection device arranged in the middle of the secondary pipeline, and a third detection device arranged at the end of the secondary pipeline; the first viscosity, the second viscosity, and the third viscosity are all obtained based on data collected by the viscosity detection device.

3. The method according to claim 2, It is characterized in that The method further comprises: The first viscosity, the second viscosity and the third viscosity are all average values ​​of data collected by the viscosity detection device; the reference viscosity is obtained from the data collected by the first detection device.

4. The method according to claim 2, It is characterized in that The method further comprises: The second viscosity is obtained from data collected by the first detection device.

5. The method according to claim 2, It is characterized in that The method further comprises: The third viscosity is obtained from data collected by the first detection device; or The third viscosity is the larger of the data collected by the first detection device, the second detection device, and the third detection device.

6. The method according to claim 1, It is characterized in that The method further comprises: The first temperature is at least 20 degrees Celsius higher than the room temperature and not less than 50 degrees Celsius.

7. The method according to claim 2, It is characterized in that The method further comprises: The difference between the temperature collected by the first temperature sensor in the first stage and the temperature of the temperature rise simulation unit when collecting the temperature is used as the second weight value; the first temperature sensor is arranged at the end of the first-level pipeline; the length of the first-level pipeline is greater than the length of the second-level pipeline; If the second weight value is less than a preset weight value threshold, weighting based on the first weight value is performed; the weight value threshold is positively correlated with the heating rate, negatively correlated with the length of the primary pipeline, and negatively correlated with the maximum value of the difference between the data collected by the first temperature sensor and the second temperature sensor at the same time; the second temperature sensor is arranged at the end of the secondary pipeline; If the second weight value is not less than the weight value threshold, it is determined that the detection result of the antifreeze liquid is unqualified.

8. The method according to claim 1, It is characterized in that The method further comprises: When a result obtained after weighting based on the first weight value is still within the standard viscosity range, increasing the heating rate and re-determining the first weight value; If the result obtained after weighting based on the re-determined first weight value is still within the standard viscosity range, it is determined that the detection result of the antifreeze liquid is qualified.

9. A computer-readable storage medium storing one or more programs, which, when executed by an electronic device including a plurality of application programs, enables the electronic device to execute any one of the methods of claims 1 to 8.

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