Method and system for constructing battery refrigerant management model

Abstract

The invention provides a construction method and system of a battery refrigerant management model, and relates to the technical field of batteries. The construction method of the battery refrigerant management model comprises the following steps: acquiring first structural feature data of a to-be-used battery cell, and acquiring second structural feature data of liquid cooling equipment; establishing a preset battery refrigerant management model based on the first structural feature data and the second structural feature data; obtaining thermal runaway characteristic data of the battery cell to be used; generating a corresponding thermal runaway CFD simulation model based on a preset battery refrigerant management model, and simulating and triggering thermal runaway of the battery cell to be used through the thermal runaway CFD simulation model and the thermal runaway characteristic data; obtaining thermal runaway simulation data of the thermal runaway CFD simulation model; generating structure adjustment parameters according to the thermal runaway simulation data; and the to-be-used battery cell and the liquid cooling equipment are processed according to the structure adjustment parameters, and a battery refrigerant management model is obtained. According to the construction method of the battery refrigerant management model, the technical effect of improving the prevention and control capability of battery thermal runaway can be achieved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular, to a method and system for constructing a battery refrigerant management model. Background Art

[0002] With the continuous changes in automobile industry technology, new energy electric vehicles have obvious advantages in the fields of energy efficiency, energy conservation and environmental protection, and have become the main direction of automobile industry technology development. The power battery is the core power device of new energy electric vehicles and occupies an important position in the field of electric vehicle technology. At present, most new energy electric vehicles use lithium-ion power batteries. During the use and storage of lithium-ion power batteries, due to defects in battery cell manufacturing, mechanical abuse and thermal abuse of lithium-ion batteries, and defects in battery system design, thermal runaway of power batteries is caused, resulting in serious safety accidents such as battery smoking, fire, combustion and explosion. Therefore, the safety of power batteries for new energy vehicles has received great attention from the new energy vehicle industry and the public. As a new thing, in the early stage of the development of new energy vehicles, the design of power battery systems only considered the needs of battery thermal management, and there was no systematic design of battery thermal safety. Once the battery has thermal runaway, the spread of battery thermal runaway is difficult to control, resulting in a high probability of fire and explosion of new energy vehicles. With the rapid development of the new energy vehicle industry, the power battery system must not only consider the needs of thermal management, but also carry out battery safety system design.

[0003] In existing battery safety design solutions, battery system module insulation design and coupled battery liquid cooling system solutions are usually adopted to prevent the spread of battery thermal runaway. However, a large number of experimental test results show that this design solution is difficult to completely suppress battery thermal runaway to a certain extent, which is mainly due to the insufficient insulation capacity of the battery system solution and the cooling capacity of the battery water cooling system. Summary of the invention

[0004] The purpose of this application is to provide a method, system, battery device, electronic device and computer-readable storage medium for constructing a battery refrigerant management model, which can achieve the technical effect of improving the ability to prevent and control battery thermal runaway.

[0005] In a first aspect, the present application provides a method for constructing a battery refrigerant management model, comprising:

[0006] Acquire first structural characteristic data of the battery cell to be used, and acquire second structural characteristic data of the liquid cooling device;

[0007] Establishing a preset battery refrigerant management model based on the first structural characteristic data and the second structural characteristic data;

[0008] Obtain thermal runaway characteristic data of the battery cell to be used;

[0009] Generate a corresponding thermal runaway CFD simulation model based on the preset battery refrigerant management model, and simulate and trigger the thermal runaway of the battery cell to be used through the thermal runaway CFD simulation model and thermal runaway characteristic data;

[0010] Acquire thermal runaway simulation data of the thermal runaway CFD simulation model;

[0011] generating a structural adjustment parameter according to the thermal runaway simulation data;

[0012] The battery cells to be used and the liquid cooling device are processed according to the structural adjustment parameters to obtain a battery refrigerant management model.

[0013] In the above implementation process, a preset battery refrigerant management model is established through the first structural characteristic data of the battery cell to be used and the second structural characteristic data of the liquid cooling equipment, and then a thermal runaway CFD simulation model is constructed; thereby, the thermal runaway process of the battery is triggered by the thermal runaway characteristic data of the battery cell to be used, and corresponding thermal runaway simulation data are obtained, and then structural adjustment parameters are generated according to the thermal runaway simulation data, so as to further adjust the structural parameters of the battery cell to be used and the liquid cooling equipment, so that the battery refrigerant management model finally obtained can effectively improve the protection effect of the battery thermal runaway; thereby, the construction method of the battery refrigerant management model can achieve the technical effect of improving the prevention and control capability of the battery thermal runaway.

[0014] Furthermore, the step of generating structural adjustment parameters according to the thermal runaway simulation data comprises:

[0015] Determining whether the thermal runaway propagation of the battery cell to be used is suppressed according to the thermal runaway simulation data;

[0016] If yes, generating structural adjustment parameters according to the thermal runaway simulation data;

[0017] If not, the first structural characteristic data and / or the second structural characteristic data are adjusted, and the process returns to the step of establishing a preset battery refrigerant management model based on the first structural characteristic data and the second structural characteristic data.

[0018] In the above implementation process, it is determined whether the thermal runaway propagation of the battery cell to be used is suppressed through the thermal runaway simulation data. The structural adjustment parameters are output only when the thermal runaway is suppressed, otherwise the first structural characteristic data and / or the second structural characteristic data are adjusted; thereby, it is ensured that the output structural adjustment parameters can effectively guarantee the prevention and control effect of the battery thermal runaway.

[0019] Furthermore, the first structural characteristic data includes thermophysical parameters of the battery cell to be used, the number of insulation boards and the thickness of the insulation board material, and the second structural characteristic data includes refrigerant flow rate, refrigerant temperature characteristics and cold plate flow channel angle.

[0020] Furthermore, the step of generating a corresponding thermal runaway CFD simulation model based on the preset battery refrigerant management model includes:

[0021] A thermal runaway CFD simulation model is generated based on one or more of the parameters of the thermophysical parameters, the number of insulation boards, the thickness of the insulation board material, the refrigerant flow rate, the refrigerant temperature characteristics, and the cold plate flow channel angle as boundary conditions.

[0022] Furthermore, after the step of processing the battery cell to be used and the liquid cooling device according to the structural adjustment parameters to obtain a battery refrigerant management model, the method further includes:

[0023] A battery thermal runaway refrigerant direct cooling thermal management model is generated based on the battery refrigerant management model. When the battery cell to be used is in a thermal runaway state, the battery thermal runaway refrigerant direct cooling thermal management model is used to grade the compressor speed, condenser fan speed, battery evaporator, and battery expansion valve opening in the liquid cooling equipment.

[0024] In the above implementation process, the battery system thermal safety insulation design and the power battery refrigerant direct cooling system are coupled through the battery thermal runaway refrigerant direct cooling thermal management model, so that when the battery triggers thermal runaway, the excellent thermal insulation capacity of the battery module and the efficient cooling performance of the refrigerant direct cooling can be fully utilized, thereby achieving the purpose of suppressing the thermal runaway of the power battery.

[0025] Furthermore, the step of obtaining thermal runaway characteristic data of the battery cell to be used includes:

[0026] Acquire thermal runaway characteristic temperature data and temperature rise rate data of the battery cell to be used under adiabatic heating conditions.

[0027] In a second aspect, the present application provides a system for constructing a battery refrigerant management model, including:

[0028] An acquisition module is used to acquire first structural characteristic data of the battery cell to be used, and to acquire second structural characteristic data of the liquid cooling device; establish a preset battery refrigerant management model based on the first structural characteristic data and the second structural characteristic data; and acquire thermal runaway characteristic data of the battery cell to be used;

[0029] A simulation module, used to generate a corresponding thermal runaway CFD simulation model based on the preset battery refrigerant management model, and simulate and trigger the thermal runaway of the battery cell to be used through the thermal runaway CFD simulation model and thermal runaway characteristic data;

[0030] The acquisition module is also used to acquire thermal runaway simulation data of the thermal runaway CFD simulation model;

[0031] A parameter adjustment module, used for generating structure adjustment parameters according to the thermal runaway simulation data;

[0032] A refrigerant management module is used to process the battery cells to be used and the liquid cooling device according to the structural adjustment parameters to obtain a battery refrigerant management model.

[0033] Furthermore, the parameter adjustment module is also used for:

[0034] Determining whether the thermal runaway propagation of the battery cell to be used is suppressed according to the thermal runaway simulation data;

[0035] If yes, generating structural adjustment parameters according to the thermal runaway simulation data;

[0036] If not, the first structural characteristic data and / or the second structural characteristic data are adjusted, and the process returns to the step of establishing a preset battery refrigerant management model based on the first structural characteristic data and the second structural characteristic data.

[0037] Furthermore, the simulation module is also used for:

[0038] A thermal runaway CFD simulation model is generated based on one or more of the parameters of the thermophysical parameters, the number of insulation boards, the thickness of the insulation board material, the refrigerant flow rate, the refrigerant temperature characteristics, and the cold plate flow channel angle as boundary conditions.

[0039] Furthermore, the construction of the battery refrigerant management model also includes a thermal runaway management module, which is used to:

[0040] A battery thermal runaway refrigerant direct cooling thermal management model is generated based on the battery refrigerant management model. When the battery cell to be used is in a thermal runaway state, the battery thermal runaway refrigerant direct cooling thermal management model is used to grade the compressor speed, condenser fan speed, battery evaporator, and battery expansion valve opening in the liquid cooling equipment.

[0041] Furthermore, the acquisition module is also used for:

[0042] Acquire thermal runaway characteristic temperature data and temperature rise rate data of the battery cell to be used under adiabatic heating conditions.

[0043] In a third aspect, the present application provides a battery device, applied to the method for constructing a battery refrigerant management model as described in any one of the first aspects, comprising a plurality of battery modules and a battery cold plate;

[0044] The battery module comprises a battery cell assembly and at least one heat insulation board, wherein the battery cell assembly comprises a plurality of battery cells placed side by side, and the heat insulation board is arranged between the battery cells of the battery cell assembly at a preset interval;

[0045] The plurality of battery modules are mounted on the battery cold plate, and a coolant flow channel and a coolant flow outlet are provided on the battery cold plate, the coolant flow channel and the coolant flow outlet are connected, and the flow direction of the coolant flow channel and the arrangement direction of the battery cells are at a preset angle;

[0046] The number and material thickness of the heat insulation plates are determined according to the thermal runaway characteristics of the battery cell, the flow rate and temperature characteristics of the liquid cooling system inlet, the preset angle of the cold plate flow channel, and the simulation analysis results of the thermal runaway model corresponding to the battery system;

[0047] The battery device further includes a module end plate, which is mounted at both ends of the battery cold plate. The module end plate is parallel to a flow direction of the coolant flow channel, and the flow direction of the coolant flow channel is perpendicular to an arrangement direction of the battery cells.

[0048] In a third aspect, the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in any one of the first aspects when executing the computer program.

[0049] In a fourth aspect, the present application provides a computer-readable storage medium, on which instructions are stored. When the instructions are executed on a computer, the computer executes the method as described in any one of the first aspects.

[0050] In a fifth aspect, the present application provides a computer program product, which, when running on a computer, enables the computer to execute the method as described in any one of the first aspects.

[0051] Other features and advantages disclosed in the present application will be described in the following description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology disclosed in the present application.

[0052] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0054] Figure 1 A schematic diagram of a process for constructing a battery refrigerant management model provided in an embodiment of the present application;

[0055] Figure 2 A schematic diagram of a flow chart of another method for constructing a battery refrigerant management model provided in an embodiment of the present application;

[0056] Figure 3 A structural block diagram of a system for constructing a battery refrigerant management model provided in an embodiment of the present application;

[0057] Figure 4 A schematic diagram of the structure of a battery device provided in an embodiment of the present application;

[0058] Figure 5 A structural block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0060] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0061] With the continuous changes in automobile industry technology, new energy electric vehicles have obvious advantages in the fields of energy efficiency, energy conservation and environmental protection, and have become the main direction of automobile industry technology development. The power battery is the core power device of new energy electric vehicles and occupies an important position in the field of electric vehicle technology. At present, most new energy electric vehicles use lithium-ion power batteries. During the use and storage of lithium-ion power batteries, due to defects in battery cell manufacturing, mechanical abuse and thermal abuse of lithium-ion batteries, and defects in battery system design, thermal runaway of power batteries is caused, resulting in serious safety accidents such as battery smoking, fire, combustion and explosion. Therefore, the safety of power batteries for new energy vehicles has received great attention from the new energy vehicle industry and the public. As a new thing, in the early stage of the development of new energy vehicles, the design of power battery systems only considered the needs of battery thermal management, and there was no systematic design of battery thermal safety. Once the battery has thermal runaway, the spread of thermal runaway is difficult to control, resulting in a high probability of fire and explosion of new energy vehicles. With the rapid development of the new energy vehicle industry, the power battery system must not only consider the needs of thermal management, but also carry out battery safety system design;

[0062] In existing battery safety design solutions, battery system module insulation design and coupled battery liquid cooling system solutions are usually adopted to prevent the spread of battery thermal runaway. However, a large number of experimental test results show that this design solution is difficult to completely suppress battery thermal runaway to a certain extent, which is mainly due to the insufficient insulation capacity of the battery system solution and the cooling capacity of the battery water cooling system;

[0063] Therefore, the present invention aims to establish a battery safety system with efficient thermal insulation capability coupled with a new type of efficient cooling refrigerant direct cooling thermal management system, making full use of the excellent thermal insulation capability of the battery system and the advantages of efficient cooling performance of refrigerant direct cooling, so as to suppress the spread of battery thermal runaway.

[0064] Experimental studies have shown that if the power battery system only adopts module insulation design, or even couples the battery liquid cooling system, it cannot completely control the spread of battery thermal runaway. This is mainly because the thermal insulation design of the battery safety system can only delay the spread of thermal runaway, but cannot stop the spread of battery thermal runaway. Secondly, under the condition of thermal runaway of the battery, the cooling capacity of the traditional battery liquid cooling system is not enough to remove the large amount of heat generated by the battery thermal runaway in a short time. In view of this, it is urgent to develop a new and efficient thermal management cooling system coupled with a battery system insulation design method to achieve complete suppression of the spread of battery thermal runaway.

[0065] See also Figure 1 , Figure 1 A flowchart of a method for constructing a battery refrigerant management model provided in an embodiment of the present application is provided. The method for constructing a battery refrigerant management model includes the following steps:

[0066] S100: Acquire first structural characteristic data of a battery cell to be used, and acquire second structural characteristic data of a liquid cooling device;

[0067] S200: Establishing a preset battery refrigerant management model based on the first structural characteristic data and the second structural characteristic data;

[0068] S300: Acquire thermal runaway characteristic data of the battery cell to be used;

[0069] S400: generating a corresponding thermal runaway CFD simulation model based on a preset battery refrigerant management model, and simulating and triggering thermal runaway of the battery cell to be used through the thermal runaway CFD simulation model and thermal runaway characteristic data;

[0070] S500: Acquire thermal runaway simulation data of a thermal runaway CFD simulation model;

[0071] S600: generating structural adjustment parameters according to thermal runaway simulation data;

[0072] S700: Process the battery cells and liquid cooling equipment to be used according to the structural adjustment parameters to obtain a battery refrigerant management model.

[0073] Exemplarily, the method for constructing a battery refrigerant management model provided in an embodiment of the present application establishes a preset battery refrigerant management model through the first structural characteristic data of the battery cell to be used and the second structural characteristic data of the liquid cooling equipment, and then constructs a thermal runaway CFD simulation model; thereby, the thermal runaway CFD simulation model is simulated to trigger the battery thermal runaway process according to the thermal runaway characteristic data of the battery cell to be used, and corresponding thermal runaway simulation data are obtained, and then structural adjustment parameters are generated according to the thermal runaway simulation data, so as to further adjust the structural parameters of the battery cell to be used and the liquid cooling equipment, so that the battery refrigerant management model finally obtained can effectively improve the protection effect of the battery thermal runaway; thereby, the method for constructing the battery refrigerant management model can achieve the technical effect of improving the prevention and control capability of the battery thermal runaway.

[0074] See also Figure 2 , Figure 2 A flowchart of another method for constructing a battery refrigerant management model provided in an embodiment of the present application.

[0075] Exemplarily, before the step of S600: generating structure adjustment parameters according to thermal runaway simulation data, the method for constructing a battery refrigerant management model further includes:

[0076] S601: judging whether the thermal runaway propagation of the battery cell to be used is suppressed according to the thermal runaway simulation data;

[0077] If yes, then S600: generating structural adjustment parameters according to the thermal runaway simulation data;

[0078] If not, then S602: adjust the first structural characteristic data and / or the second structural characteristic data, and return to the step of establishing a preset battery refrigerant management model based on the first structural characteristic data and the second structural characteristic data.

[0079] Exemplarily, the thermal runaway simulation data is used to determine whether the thermal runaway propagation of the battery cell to be used is suppressed. The structural adjustment parameters are output only when the thermal runaway is suppressed, otherwise the first structural characteristic data and / or the second structural characteristic data are adjusted; thereby, it is ensured that the output structural adjustment parameters can effectively guarantee the prevention and control effect of the battery thermal runaway.

[0080] Exemplarily, the first structural characteristic data include the thermophysical parameters of the battery cells to be used, the number of thermal insulation boards and the thickness of the thermal insulation board materials, and the second structural characteristic data include the refrigerant flow rate, the refrigerant temperature characteristics and the cold plate flow channel angle.

[0081] Exemplarily, S400: the step of generating a corresponding thermal runaway CFD simulation model based on a preset battery refrigerant management model includes:

[0082] S410: Generate a thermal runaway CFD simulation model based on one or more parameters of thermophysical parameters, the number of heat insulation boards, the thickness of heat insulation board materials, refrigerant flow rate, refrigerant temperature characteristics, and cold plate flow channel angle as boundary conditions.

[0083] Exemplarily, after the step of processing the battery cell and the liquid cooling device to be used according to the structural adjustment parameters to obtain a battery refrigerant management model in S700, the method further includes:

[0084] S800: Generate a battery thermal runaway refrigerant direct cooling thermal management model based on the battery refrigerant management model. When the battery cell to be used is in a thermal runaway state, the battery thermal runaway refrigerant direct cooling thermal management model is used to hierarchically control the compressor speed, condenser fan speed, battery evaporator, and battery expansion valve opening in the liquid cooling equipment.

[0085] Illustratively, the battery system thermal safety insulation design and the power battery refrigerant direct cooling system are coupled through the battery thermal runaway refrigerant direct cooling thermal management model, so that when the battery triggers thermal runaway, the excellent thermal insulation capacity of the battery module and the efficient cooling performance of the refrigerant direct cooling can be fully utilized, thereby achieving the purpose of suppressing the thermal runaway of the power battery.

[0086] Exemplarily, S100: the step of obtaining thermal runaway characteristic data of the battery cell to be used includes:

[0087] Obtain thermal runaway characteristic temperature data and temperature rise rate data of the battery cell to be used under adiabatic heating conditions.

[0088] See also Figure 3 , Figure 3 This is a structural block diagram of a system for constructing a battery refrigerant management model provided in an embodiment of the present application. The system for constructing a battery refrigerant management model includes:

[0089] The acquisition module 100 is used to acquire first structural characteristic data of the battery cell to be used, and to acquire second structural characteristic data of the liquid cooling device; establish a preset battery refrigerant management model based on the first structural characteristic data and the second structural characteristic data; and acquire thermal runaway characteristic data of the battery cell to be used;

[0090] The simulation module 200 is used to generate a corresponding thermal runaway CFD simulation model based on a preset battery refrigerant management model, and to simulate and trigger the thermal runaway of the battery cell to be used through the thermal runaway CFD simulation model and thermal runaway characteristic data;

[0091] The acquisition module 100 is also used to acquire thermal runaway simulation data of a thermal runaway CFD simulation model;

[0092] A parameter adjustment module 300, for generating structural adjustment parameters according to thermal runaway simulation data;

[0093] The refrigerant management module 400 is used to process the battery cells and liquid cooling equipment to be used according to the structural adjustment parameters to obtain a battery refrigerant management model.

[0094] Exemplarily, the parameter adjustment module 300 is further used for:

[0095] Determine whether the thermal runaway propagation of the battery cell to be used is suppressed according to the thermal runaway simulation data;

[0096] If so, the structural adjustment parameters are generated based on the thermal runaway simulation data;

[0097] If not, the first structural characteristic data and / or the second structural characteristic data are adjusted, and the process returns to the step of establishing a preset battery refrigerant management model based on the first structural characteristic data and the second structural characteristic data.

[0098] Exemplarily, the simulation module 200 is further used for:

[0099] A thermal runaway CFD simulation model is generated based on one or more parameters including thermophysical parameters, the number of insulation boards, the thickness of insulation board materials, refrigerant flow rate, refrigerant temperature characteristics, and the cold plate flow channel angle as boundary conditions.

[0100] Exemplarily, the construction of the battery refrigerant management model also includes a thermal runaway management module, which is used to:

[0101] A battery thermal runaway refrigerant direct cooling thermal management model is generated based on the battery refrigerant management model. When the battery cell to be used is in a thermal runaway state, the battery thermal runaway refrigerant direct cooling thermal management model is used to grade the compressor speed, condenser fan speed, battery evaporator, and battery expansion valve opening in the liquid cooling equipment.

[0102] Exemplarily, the acquisition module 100 is further used for:

[0103] Obtain thermal runaway characteristic temperature data and temperature rise rate data of the battery cell to be used under adiabatic heating conditions.

[0104] It should be noted that the construction system of the battery refrigerant management model provided in the embodiment of the present application is similar to Figure 1 to Figure 2 The method embodiments shown correspond to each other and will not be described again here to avoid repetition.

[0105] See also Figure 4 , Figure 4 A schematic diagram of a battery device provided in an embodiment of the present application, which is applied to Figure 1 , Figure 2 The method for constructing a battery refrigerant management model shown in the figure, the battery device includes multiple battery modules 10 and a battery cold plate 20; wherein the number and material thickness of the heat insulation plates are determined according to the thermal runaway characteristics of the battery cells, the inlet flow and temperature characteristics of the liquid cooling system, the preset angle of the cold plate flow channel and the simulation analysis results of the thermal runaway model corresponding to the battery system; the battery device also includes a module end plate, which is installed at both ends of the battery cold plate, and the module end plate is parallel to the flow direction of the refrigerant flow channel, and the flow direction of the refrigerant flow channel is perpendicular to the arrangement direction of the battery cells.

[0106] Exemplarily, the battery module 10 includes a battery cell assembly 11 and at least one heat shield 12, the battery cell assembly 11 includes a plurality of battery cells 111 placed side by side, and the heat shield 12 is arranged between the battery cells of the battery cell assembly 11 at a preset interval;

[0107] Exemplarily, a plurality of battery modules 10 are mounted on a battery cold plate 20 , on which a refrigerant flow channel 21 and a cold flow outlet 22 are provided. The refrigerant flow channel 21 and the cold flow outlet 22 are connected, and a flow direction of the refrigerant flow channel 21 is at a preset angle to an arrangement direction of the battery cells 111 .

[0108] Exemplarily, the refrigerant flow channel 21 includes multiple channels, each of which is parallel to each other. The flow of refrigerant in the refrigerant flow channel 21 can take away the heat generated by the battery cell 111; by adjusting the angle between the flow direction of the refrigerant flow channel 21 and the arrangement direction of the battery cell 111, the heat dissipation efficiency of the battery cell 111 can be adjusted.

[0109] Exemplarily, the arrangement direction of the battery cells 111 is consistent with the thermal runaway propagation direction of the battery cells 111 in the battery module 10; the flow direction of the refrigerant flow channel 21 and the arrangement direction of the battery cells 111 are at a preset angle, which may be a vertical angle, that is, the thermal runaway propagation direction of the battery cells 111 in the battery module 10 and the refrigerant flow direction of the battery cold plate 20 are arranged perpendicular to each other, so that the refrigerant in the refrigerant flow channel 21 can effectively take away the heat of the battery cells 111, thereby improving the prevention and control effect of battery thermal runaway.

[0110] Exemplarily, the insulation board 12 is composed of insulation material; optionally, the insulation board 12 may be an aerogel, which refers to a nano-scale porous solid material formed by using a sol-gel method and a certain drying method to replace the liquid phase in the gel with gas.

[0111] Exemplarily, the thermal runaway propagation rate is hindered by the thermal insulation board 12, providing a powerful condition for giving full play to the cooling performance of the battery thermal management system. Optionally, the thermal insulation design of the battery module 10 adopts 2-3 battery cells 111 to be combined and then add a layer of thermal insulation board 12. The thickness of the thermal insulation board 12 can be designed according to the thermal runaway characteristics of different series of battery cells to adjust the thermal resistance generated by the thermal insulation pad. In this way, it can ensure that the battery module 10 has good thermal insulation performance in the direction of thermal runaway propagation, while controlling the layout space and cost of the battery system within a reasonable range. For the thermal insulation design between battery modules 10, thermal insulation materials can be arranged on both sides of the battery module 10 to prevent the heat of the thermal runaway module from diffusing to the surrounding modules.

[0112] In some embodiments, the insulation plate 12 in the battery device is arranged between the cells of the battery cell assembly 11 at a preset interval, which not only ensures that the battery module 10 has good insulation ability, but also takes into account the actual structural design requirements and the cost of the entire package of the battery module 10; at the same time, the flow direction of the refrigerant flow channel 21 and the arrangement direction of the battery cell 111 are at a preset angle, and a coupling design of battery thermal safety insulation and battery cold plate is established, that is, the thermal runaway propagation direction of the battery cell 111 in the battery module 10 and the refrigerant flow direction of the battery cold plate 20 can be arranged perpendicular to each other, thereby effectively improving the prevention and control effect of battery thermal runaway.

[0113] Exemplarily, the battery device further includes a heat conductor 23 , which is disposed between the battery cold plate 20 and the battery module 10 .

[0114] Exemplarily, the heat transfer efficiency is improved by the heat conductor 23 , so that the heat generated by the battery module 10 is more efficiently conducted to the battery cold plate 20 .

[0115] Exemplarily, the battery device further includes a module end plate 24 , which is mounted at both ends of the battery cold plate 20 , and the module end plate 24 is parallel to the flow direction of the coolant flow channel 21 , and the flow direction of the coolant flow channel 21 is perpendicular to the arrangement direction of the battery cells 111 .

[0116] Exemplarily, the module end plate 24 fixes and protects the battery module 10, and the flow direction of the refrigerant flow channel 21 is perpendicular to the arrangement direction of the battery cells 111 at a preset angle, that is, the thermal runaway propagation direction of the battery cells 111 in the battery module 10 and the refrigerant flow direction of the battery cold plate 20 are arranged perpendicular to each other, so that the refrigerant in the refrigerant flow channel 21 can effectively take away the heat of the battery cells 111, thereby improving the prevention and control effect of battery thermal runaway.

[0117] In some embodiments, the design of the refrigerant flow channel 21 needs to ensure that the flow distribution of each refrigerant flow channel 21 is uniform as much as possible, which can not only ensure that the battery thermal management temperature uniformity requirements are met in the non-thermal runaway state, but also ensure that the spread of battery thermal runaway is effectively controlled.

[0118] This application also provides an electronic device, see Figure 5 , Figure 5 A block diagram of an electronic device provided in an embodiment of the present application. The electronic device may include a processor 510, a communication interface 520, a memory 530, and at least one communication bus 540. The communication bus 540 is used to realize direct connection and communication between these components. The communication interface 520 of the electronic device in the embodiment of the present application is used to communicate signaling or data with other node devices. The processor 510 may be an integrated circuit chip with signal processing capabilities.

[0119] The processor 510 mentioned above 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 510 can also be any conventional processor, etc.

[0120] The memory 530 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electric erasable programmable read-only memory (EEPROM), etc. The memory 530 stores computer-readable instructions. When the computer-readable instructions are executed by the processor 510, the electronic device can execute the above-mentioned Figure 1 to Figure 2 The method embodiment involves various steps.

[0121] Optionally, the electronic device may further include a storage controller and an input / output unit.

[0122] The memory 530, storage controller, processor 510, peripheral interface, input and output unit components are directly or indirectly electrically connected to each other to achieve data transmission or interaction. For example, these components can be electrically connected to each other via one or more communication buses 540. The processor 510 is used to execute executable modules stored in the memory 530, such as software function modules or computer programs included in the electronic device.

[0123] The input and output unit is used to provide users with the task creation and to create a start optional time period or preset execution time for the task to realize the interaction between the user and the server. The input and output unit can be, but is not limited to, a mouse and a keyboard.

[0124] Understandably, Figure 5 The structure shown is for illustration only, and the electronic device may also include Figure 5 More or fewer components as shown, or with Figure 5 Different configurations shown. Figure 5 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0125] An embodiment of the present application further provides a storage medium having instructions stored thereon. When the instructions are run on a computer, the computer program is executed by a processor to implement the method described in the method embodiment. To avoid repetition, the method will not be described here.

[0126] The present application also provides a computer program product, which, when executed on a computer, enables the computer to execute the method described in the method embodiment.

[0127] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0128] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0129] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0130] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0131] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0132] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A method for constructing a battery refrigerant management model, characterized in that: include: Acquire first structural characteristic data of the battery cell to be used, and acquire second structural characteristic data of the liquid cooling device; Establishing a preset battery refrigerant management model based on the first structural characteristic data and the second structural characteristic data; Obtain thermal runaway characteristic data of the battery cell to be used; Generate a corresponding thermal runaway CFD simulation model based on the preset battery refrigerant management model, and simulate and trigger the thermal runaway of the battery cell to be used through the thermal runaway CFD simulation model and the thermal runaway characteristic data; Acquire thermal runaway simulation data of the thermal runaway CFD simulation model; generating a structural adjustment parameter according to the thermal runaway simulation data; The battery cells to be used and the liquid cooling device are processed according to the structural adjustment parameters to obtain a battery refrigerant management model.

2. The method for constructing a battery refrigerant management model according to claim 1, characterized in that: The step of generating structural adjustment parameters according to the thermal runaway simulation data comprises: Determining whether the thermal runaway propagation of the battery cell to be used is suppressed according to the thermal runaway simulation data; If yes, generating structural adjustment parameters according to the thermal runaway simulation data; If not, the first structural characteristic data and / or the second structural characteristic data are adjusted, and the process returns to the step of establishing a preset battery refrigerant management model based on the first structural characteristic data and the second structural characteristic data.

3. The method for constructing a battery refrigerant management model according to claim 1 or 2, characterized in that: The first structural characteristic data includes the thermophysical parameters of the battery cell to be used, the number of insulation boards and the thickness of the insulation board material, and the second structural characteristic data includes the refrigerant flow rate, the refrigerant temperature characteristics and the cold plate flow channel angle.

4. The method for constructing a battery refrigerant management model according to claim 3, characterized in that: The step of generating a corresponding thermal runaway CFD simulation model based on the preset battery refrigerant management model includes: A thermal runaway CFD simulation model is generated based on one or more of the parameters of the thermophysical parameters, the number of insulation boards, the thickness of the insulation board material, the refrigerant flow rate, the refrigerant temperature characteristics, and the cold plate flow channel angle as boundary conditions.

5. The method for constructing a battery refrigerant management model according to claim 1, characterized in that: After the step of processing the battery cell to be used and the liquid cooling device according to the structural adjustment parameters to obtain a battery refrigerant management model, the method further includes: A battery thermal runaway refrigerant direct cooling thermal management model is generated based on the battery refrigerant management model. When the battery cell to be used is in a thermal runaway state, the battery thermal runaway refrigerant direct cooling thermal management model is used to grade the compressor speed, condenser fan speed, battery evaporator, and battery expansion valve opening in the liquid cooling equipment.

6. The method for constructing a battery refrigerant management model according to claim 1, characterized in that: The steps of obtaining thermal runaway characteristic data of the battery cell to be used include: Acquire thermal runaway characteristic temperature data and temperature rise rate data of the battery cell to be used under adiabatic heating conditions.

7. A system for constructing a battery refrigerant management model, characterized in that: include: An acquisition module is used to acquire first structural characteristic data of the battery cell to be used, and to acquire second structural characteristic data of the liquid cooling device; establish a preset battery refrigerant management model based on the first structural characteristic data and the second structural characteristic data; and acquire thermal runaway characteristic data of the battery cell to be used; A simulation module, used to generate a corresponding thermal runaway CFD simulation model based on the preset battery refrigerant management model, and simulate and trigger the thermal runaway of the battery cell to be used through the thermal runaway CFD simulation model and thermal runaway characteristic data; The acquisition module is also used to acquire thermal runaway simulation data of the thermal runaway CFD simulation model; A parameter adjustment module, used for generating structure adjustment parameters according to the thermal runaway simulation data; A refrigerant management module is used to process the battery cells to be used and the liquid cooling device according to the structural adjustment parameters to obtain a battery refrigerant management model.

8. A battery device, characterized in that: A method for constructing a battery refrigerant management model as claimed in any one of claims 1 to 6, comprising a plurality of battery modules and a battery cold plate; The battery module comprises a battery cell assembly and at least one heat insulation board, wherein the battery cell assembly comprises a plurality of battery cells placed side by side, and the heat insulation board is arranged between the battery cells of the battery cell assembly at a preset interval; The plurality of battery modules are mounted on the battery cold plate, and a coolant flow channel and a coolant flow outlet are provided on the battery cold plate, the coolant flow channel and the coolant flow outlet are connected, and the flow direction of the coolant flow channel and the arrangement direction of the battery cells are at a preset angle; The number and material thickness of the heat insulation plates are determined according to the thermal runaway characteristics of the battery cell, the flow rate and temperature characteristics of the liquid cooling system inlet, the preset angle of the cold plate flow channel, and the simulation analysis results of the thermal runaway model corresponding to the battery system; The battery device further includes a module end plate, which is mounted at both ends of the battery cold plate. The module end plate is parallel to a flow direction of the coolant flow channel, and the flow direction of the coolant flow channel is perpendicular to an arrangement direction of the battery cells.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method for constructing a battery refrigerant management model as described in any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed on a computer, the computer executes the method for constructing a battery refrigerant management model according to any one of claims 1 to 6.

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