A method and device for adjusting flow uniformity of liquid cooling plate

Abstract

The present application proposes a method and device for regulating the flow uniformity of a liquid cooling plate, including: determining a first connection relationship between the main circuit and the branch circuit of the liquid cooling plate; determining a first pressure loss parameter of the cooling medium from the main circuit inlet to the branch circuit inlet according to the first connection relationship; obtaining the flow section setting mode of the main circuit according to the first pressure loss parameter, and regulating the cooling medium flow between the main circuit and the branch circuit of the liquid cooling plate according to the flow section setting mode and the first connection relationship. By determining the first pressure loss parameter of the cooling medium from the main circuit inlet to the branch circuit inlet and obtaining the flow section setting mode of the main circuit, the cooling medium flow between the main circuit and the branch circuit of the liquid cooling plate is regulated, and under the condition of the same heat exchange load and heat exchange area, the flow of parallel pipelines of the same shape and the same cross-sectional area is made uniform, so that the liquid cooling plate can more effectively and evenly cool the battery cells of the battery module, reduce the temperature difference between the battery cells, and improve the overall performance of the battery module.

Description

Technical Field

[0001] The present application relates to the field of new energy design and application, and in particular to a method and device for regulating flow uniformity of a liquid cooling plate. Background Art

[0002] The battery module uses indirect liquid cooling technology for heat exchange. In order to obtain a suitable heat exchange effect, the liquid cooling plate of the battery module usually opens a parallel branch, which can reduce the maximum temperature of the battery module and improve the uniformity of the temperature, but the uneven flow distribution will increase the energy consumption of the system, weaken the cooling effect, and increase the temperature difference, thus affecting the overall performance of the battery module.

[0003] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Summary of the invention

[0004] The embodiments of the present application provide a method and device for adjusting flow uniformity of a liquid cooling plate.

[0005] The first embodiment of the present application proposes a method for adjusting flow uniformity of a liquid cooling plate, comprising:

[0006] Determine a first connection relationship between a main circuit and a branch circuit of a liquid cooling plate;

[0007] Determine a first pressure loss parameter of the cooling medium from the main path inlet to the branch path inlet according to the first connection relationship;

[0008] According to the first pressure loss parameter, a flow section setting mode of the main path is obtained, and according to the flow section setting mode and the first connection relationship, a cooling medium flow rate between the main path and the branch path of the liquid cooling plate is adjusted.

[0009] The second embodiment of the present application provides a liquid cooling plate flow uniformity regulating device, comprising:

[0010] A first acquisition module, the first acquisition module is used to determine a first connection relationship between a main circuit and a branch circuit of the liquid cooling plate;

[0011] A second acquisition module, the second acquisition module is used to determine a first pressure loss parameter of the cooling medium from the main road inlet to the branch road inlet according to the first connection relationship;

[0012] The regulating module is used to obtain the flow section setting mode of the main path according to the first pressure loss parameter, and to regulate the cooling medium flow between the main path and the branch path of the liquid cooling plate according to the flow section setting mode and the first connection relationship.

[0013] The third aspect embodiment of the present application proposes an electronic device, comprising: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions to implement the liquid cooling plate flow uniformity adjustment method proposed in the first aspect embodiment of the present application.

[0014] The fourth aspect embodiment of the present application proposes a non-temporary computer-readable storage medium. When the instructions in the storage medium are executed by the processor of an electronic device, the electronic device can execute the method proposed in the first aspect embodiment of the present application.

[0015] The fifth aspect embodiment of the present application proposes a computer program product, including a computer program, which implements the method proposed in the first aspect embodiment of the present application when executed by a processor in a communication device.

[0016] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0017] By determining the first pressure loss parameter of the cooling medium from the main road inlet to the branch road inlet and obtaining the flow section setting method of the main road, the cooling medium flow between the main road and the branch road of the liquid cooling plate is adjusted. Under the condition of the same heat exchange load and heat exchange area, the flow of parallel pipelines with the same shape and the same cross-sectional area is made uniform, so that the liquid cooling plate can more effectively and evenly cool the battery cells of the battery module, reduce the temperature difference between the battery cells, and improve the overall performance of the battery module.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 A schematic flow chart of a method for adjusting flow uniformity of a liquid cooling plate provided in an embodiment of the present application;

[0021] Figure 2 A schematic flow chart of another method for adjusting flow uniformity of a liquid cooling plate provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the structure of a liquid cooling plate flow uniformity regulating device provided in an embodiment of the present application;

[0023] Figure 4 It is a structural schematic diagram of an energy storage liquid-cooled battery module provided according to an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the flow of cooling medium in a liquid cooling plate according to an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the structure of an electronic device provided according to an embodiment of the present application;

[0026] Figure 7 It is a schematic diagram of the structure of another electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0028] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0029] It should be understood that, although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present application, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the embodiments of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at..." or "when..." or "in response to determination".

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0031] It should be noted that the liquid cooling plate flow uniformity adjustment method provided in any embodiment of the present application can be executed alone, or in combination with possible implementation methods in other embodiments, or in combination with any technical solution in the related technology.

[0032] The following describes a method and device for adjusting flow uniformity of a liquid cooling plate according to an embodiment of the present application with reference to the accompanying drawings.

[0033] Figure 1 A schematic diagram of a flow chart of a method for adjusting flow uniformity of a liquid cooling plate provided in an embodiment of the present application. Figure 1 As shown, the method includes but is not limited to the following steps:

[0034] S101, determining a first connection relationship between a main circuit and a branch circuit of a liquid cooling plate.

[0035] In a feasible embodiment, the liquid cooling plate is a heat sink that uses liquid cooling, and is usually composed of a metal substrate and a liquid pipe covering the metal substrate. The liquid cooling plate is usually arranged under the battery module, and transfers heat by closely fitting with the surface of the battery module. A flow channel is arranged inside the liquid cooling plate, and the cooling medium circulates in the flow channel to exchange heat with the surface of the battery module, thereby taking away the heat generated by the battery module.

[0036] Figure 4 Schematic diagram of the structure of the energy storage liquid-cooled battery module provided according to the embodiment of the present application. Figure 4 As shown, in order to achieve a lower pressure drop and better heat dissipation effect, the liquid cooling plate is usually provided with a parallel branch (because the liquid cooling plate is arranged below the battery module, the parallel branch is not Figure 4 In the figure, based on the parallel branch, the battery cell array of the battery module is usually distributed at equal distances. The liquid cooling plate inlet and the liquid cooling plate outlet are respectively set on the liquid cooling plate. The cooling medium flows in from the liquid cooling plate inlet and flows out from the liquid cooling plate outlet. Through circulation, the battery cells of the battery module are cooled. This design method provides the premise for uniform heat dissipation of the battery module from a structural perspective. However, if the flow distribution of the cooling medium is uneven, it will lead to a large temperature difference between the battery cells, which will have an adverse effect on the overall performance of the battery module.

[0037] Therefore, it is necessary to improve the uniformity of the cooling medium flow distribution of each parallel pipeline of the liquid cooling plate. Prior to this, it is necessary to identify the first connection relationship between the main road and the branch road of the liquid cooling plate. For the liquid cooling plate of the battery module, the main road usually refers to the main channel responsible for transporting the cooling medium to each heat dissipation area; the branch road is branched from the main road to transport the cooling medium to the specific battery cell surface. In the process of circulating the cooling medium, there is a certain pressure loss, which is also called pressure drop, reflecting the pressure lost by the cooling medium due to various resistances during the flow process. The pressure loss of the cooling medium mainly includes two parts: along-the-way pressure loss and local pressure loss. Along-the-way pressure loss refers to the pressure loss caused by the viscosity of the cooling medium when the cooling medium flows in a straight pipe. This loss is related to factors such as the length of the pipeline, the diameter of the pipe, the flow rate of the cooling medium, and the roughness of the inner wall of the pipeline. The along-the-way pressure loss will cause friction between the cooling medium and the inner wall of the pipeline, causing part of the mechanical energy to be converted into heat energy and dissipated, thereby causing a decrease in pressure. Local pressure loss refers to the pressure loss caused when the cooling medium flows through local resistances such as valve ports, bends, and changes in flow cross-sections. These local resistances can cause the flow velocity and direction of the cooling medium to change dramatically, leading to eddy currents, collisions, and friction inside the cooling medium, thereby consuming energy and causing pressure drop.

[0038] Furthermore, if the first connection relationship between the main circuit and the branch circuit of the liquid cooling plate can be accurately identified, the accuracy of the calculation of the pressure loss of the cooling medium can be greatly improved, thereby improving the uniformity of the flow distribution of the cooling medium. The first relationship includes the physical connection relationship and the logical connection relationship between the main circuit and the branch circuit, wherein the physical connection relationship between the main circuit and the branch circuit is identified, including clarifying the interface position, size and connection method between the main circuit and the branch circuit (the connection method includes flange connection method, welding connection method, etc.), and ensuring the sealing and pressure resistance of the connection between the main circuit and the branch circuit to prevent leakage of the cooling medium. In the system of the entire battery module, the logical connection between the main circuit and the branch circuit includes clarifying the correspondence and control strategy between the main circuit and the branch circuit, for example, adjusting the valve opening of the corresponding branch circuit according to the inlet and outlet temperature difference of the liquid cooling plate to achieve the flow distribution and temperature control of the cooling medium.

[0039] S102: Determine a first pressure loss parameter of the cooling medium from a main path inlet to a branch path inlet according to the first connection relationship.

[0040] In a feasible implementation, the cause and calculation method of the pressure loss generated when the cooling medium flows in the main and direct current are determined based on the physical connection relationship and logical connection relationship between the main and branch roads. Before obtaining the first pressure loss parameter, all parameters related to the pressure loss calculation can be collected based on the perception network, including the diameter and length of the pipeline, the number of parallel branches, the distribution relationship between the main road and the parallel branches, the number of elbows, the valve type, the opening degree, the density of the cooling medium, the viscosity of the cooling medium, and the flow rate of the cooling medium. According to the collected parameters, the first connection relationship between the main road and the branch road, and the accuracy requirements, a suitable pressure loss calculation model is selected. The pressure loss calculation model can use the Darcy-Weisbach equation, the local pressure loss coefficient method, etc., wherein the first connection relationship between the main road and the branch road can determine the flow rate of the main road and the flow relationship between each branch road. Assuming that the number of branches is n, and n is a natural number greater than 1, the flow rate Q of the main road 主 The relationship between the flow rate of each branch Qi (1≤i≤n) satisfies:

[0041]

[0042] If the main circuit is located in the middle of the liquid cooling plate and the branches are distributed on both sides of the main circuit, the flow of each branch on both sides of the main circuit is calculated respectively.

[0043] Furthermore, the Darcy-Weisbach equation can be used to calculate the pressure loss along the way, or the Hagen-Poiseuille equation can be used to calculate the pressure loss of the straight pipe, or the Xie Cai formula, Colebrook-White equation, Blasius formula, etc. can be used to determine the pressure loss along the way; for local pressure loss, the local pressure loss coefficient method can be used to calculate. The pressure loss along the way and the local pressure loss are added to obtain the first pressure loss parameter of the cooling medium from the main road entrance to the branch road entrance.

[0044] It should be noted that a numerical simulation method may also be used to obtain the pressure loss along the way and the local pressure loss based on computational fluid dynamics, so as to determine the first pressure loss parameter of the cooling medium from the main inlet to the branch inlet.

[0045] S103, according to the first pressure loss parameter, obtaining a flow section setting mode of the main path, and adjusting the cooling medium flow between the main path and the branch path of the liquid cooling plate according to the flow section setting mode and the first connection relationship.

[0046] In a feasible implementation, the first pressure loss parameter reflects the dimension of the resistance of the cooling medium during the flow process. If the first pressure loss parameter is larger, it means that the resistance is larger, and the flow rate of the cooling medium in the liquid cooling plate will decrease. If the first pressure loss parameter indicates that the pressure loss is too large, it may be necessary to increase the flow section to reduce resistance and increase flow. In addition to adjusting the area of ​​the flow section, you can also consider optimizing the shape of the flow section, such as using a streamlined design to reduce friction between the cooling medium and the wall. The first connection relationship characterizes the connection method (such as T-type connection, Y-type connection, star connection, etc.) and layout (such as the position and number of branches on the main road) between the main road and the branch. According to the flow demand of the main road, flow control measures can be set on the branch to adjust the flow of the branch, thereby indirectly affecting the flow distribution of the main road.

[0047] Furthermore, based on the computational fluid dynamics model, the flow cross-sectional mode and the first connection relationship of the cooling medium in the main circuit and the branch circuit can be simulated to obtain the first reference flow of the cooling medium in the main circuit and the second reference flow of each branch circuit after the pressure loss, and then the flow of the cooling medium in the main circuit is adjusted in real time according to the first reference flow; the flow of the cooling medium in the branch circuit is adjusted in real time according to the second reference flow. Furthermore, according to the first connection relationship and layout of the main circuit and the branch circuit, the flow of the cooling medium is gradually adjusted to avoid excessive impact of the cooling medium on the wall during the flow, and the various index data before and after the adjustment are recorded in detail, and according to the index data, the flow of the cooling medium is analyzed, optimized and feedback-adjusted in real time.

[0048] The embodiment of the present application provides a method for regulating the flow uniformity of a liquid cooling plate. By determining the first pressure loss parameter of the cooling medium from the main inlet to the branch inlet and obtaining the flow section setting method of the main path, the flow of the cooling medium between the main path and the branch of the liquid cooling plate is regulated. Under the condition of the same heat exchange load and heat exchange area, the flow of parallel pipelines of the same shape and the same cross-sectional area is made uniform, so that the liquid cooling plate can more effectively and evenly cool the battery cells of the battery module, reduce the temperature difference between the battery cells, and improve the overall performance of the battery module.

[0049] Figure 2 This is a flow chart of another method for adjusting flow uniformity of a liquid cooling plate provided in an embodiment of the present application. Figure 2 As shown, the method includes but is not limited to the following steps:

[0050] S201, obtaining thermophysical property parameters of the battery module according to the electrochemical reaction of the battery module.

[0051] In a feasible embodiment, the battery module generates heat during the charge and discharge process due to the occurrence of electrochemical reactions. This heat mainly comes from the heat generated when the current passes through the internal resistance of the battery, the heat generated by the mismatch between the electrochemical reaction rate inside the battery and the electron transfer rate, and the endothermic and exothermic processes accompanying the electrochemical reaction inside the battery itself. In order to obtain thermal physical parameters (thermal physical parameters include thermal conductivity, specific heat capacity, thermal expansion coefficient, etc.), it can be measured by a perception network, which can measure the thermal conductivity of the battery module using a steady-state method or a transient method. For example, a constant heat flow can be applied to the battery module, and the temperature distribution of the heat flow can be measured to calculate the thermal conductivity. On the other hand, the perception network can also obtain the specific heat capacity of the battery module. For example, the specific heat capacity can be calculated by measuring the temperature change of the battery module after absorbing a certain amount of heat or the temperature change after releasing a certain amount of heat. Furthermore, the perception network can measure the change in the size of the battery module under the condition of controlling the temperature change, thereby obtaining the thermal expansion coefficient.

[0052] S202: Determine a first connection relationship between a main circuit and a branch circuit of a liquid cooling plate according to thermophysical property parameters.

[0053] In a feasible implementation, the heat generation rate of the battery module can be obtained according to the thermophysical parameters of the battery module; then, the heat transfer model of the battery module is obtained according to the heat generation rate. Furthermore, according to the heat generation rate, the first correlation between the internal resistance of the battery module, the battery state of charge and the temperature of the battery module is obtained, wherein, as the temperature increases, the ion migration rate inside the battery accelerates, and the internal resistance may decrease. However, high temperature may also cause the degradation of battery materials, thereby increasing the internal resistance. According to the electrochemical kinetic process of the battery module, the relationship between the internal resistance and temperature is simulated by modeling, and the relationship may be linear, nonlinear or discontinuous linear. The battery state of charge will also affect the internal resistance. As the battery state of charge changes, the concentration and distribution of active substances inside the battery will also change. The relationship between the battery state of charge and the internal resistance should be simulated according to electrochemical principles.

[0054] Since the heat generation rate of the battery module is mainly composed of ohmic heat, polarization heat and reaction heat, all of these heats are related to the internal resistance of the battery module, the battery state of charge and temperature. Therefore, to obtain the first correlation, it is necessary to establish a mathematical model containing the above parameters, which can describe how the internal resistance of the battery changes at different states of charge and different temperatures, and how these changes affect the heat generation rate. Then, based on the numerical simulation method, the mathematical model is fitted, and then based on the output of the mathematical model, the first correlation is obtained.

[0055] Further, according to the first correlation, the charging and discharging process of the battery module is simulated to obtain the heat transfer model of the battery module. It should be noted that the charging and discharging process of the battery module can be simulated by means of lumped parameter method, distributed parameter method and computational fluid dynamics method. Then, the geometric model of the battery module during the charging and discharging process can be constructed by three-dimensional modeling. According to the geometric model, the boundary conditions are determined, and the boundary conditions include thermal conductivity, specific heat capacity, liquid cooling plate inlet temperature, liquid cooling plate outlet temperature, flow rate of the cooling medium, etc. The geometric model is then meshed, and each mesh corresponds to a battery cell. Then, according to the heat transfer model of the battery module, the first connection relationship between the main road and the branch of the liquid cooling plate is determined, wherein, according to the heat transfer model of the battery module, the flow mode of the cooling medium between the battery module and the liquid cooling plate is determined; according to the flow mode, the structural mode of the liquid cooling plate is determined; according to the structural mode, the first connection relationship between the main road and the branch of the liquid cooling plate is determined.

[0056] For further details of step S202, please refer to the relevant contents in the above embodiment, which will not be repeated here.

[0057] S203: Determine a first pressure loss parameter of the cooling medium from the main path inlet to the branch path inlet according to the first connection relationship.

[0058] In a feasible implementation, according to the first connection relationship, the resistance coefficient along the main road entrance to the branch road entrance (the resistance value along the road, i.e., the pressure loss along the road) is obtained. As an example, the loss parameter along the road can be represented as ΔP1, and ΔP1 can be represented as:

[0059]

[0060] Among them, λ is the resistance coefficient along the way (which can be obtained by fitting through the Reynolds number and dynamic viscosity, and the specific fitting process is not repeated here), l is the pipe through which the cooling medium flows, d is the diameter of the pipe, and ρ is the speed of the cooling medium (the speed is equal to the flow rate of the pipe divided by the cross-sectional area of ​​the pipe).

[0061] According to the first connection relationship, the local resistance coefficient can be obtained (the local resistance coefficient includes the section resistance coefficient ξ1 and the folded pipe resistance coefficient ξ2); according to the along-the-line resistance coefficient λ, the section resistance coefficient ξ1 and the folded pipe resistance coefficient ξ2, the first pressure loss parameter of the cooling medium from the main road entrance to the branch road entrance is determined.

[0062] Furthermore, according to the along-the-path resistance coefficient λ, the along-the-path loss parameter ΔP1 of the cooling medium from the main road entrance to the branch road entrance is determined. The calculation process of the along-the-path loss parameter ΔP1 will not be described in detail here. Then, according to the cross-sectional resistance coefficient ξ1, the cross-sectional loss parameter of the liquid cooling plate is determined, wherein the first proportional relationship between the main road entrance cross section (i.e., the area of ​​the main road entrance cross section, which can be represented by the square of the main road entrance diameter) and the branch road entrance cross section (i.e., the area of ​​the branch road entrance cross section, which can be represented by the square of the main branch road entrance diameter) can be obtained. Then, based on the fitting operation of the three-dimensional model of the liquid cooling plate to the first proportional relationship, the cross-sectional loss parameter of the liquid cooling plate is obtained, wherein, according to the first proportional relationship, the cross-sectional resistance coefficient ξ1 is obtained, and the cross-sectional resistance coefficient ξ1 can be obtained by fitting the three-dimensional model of the liquid cooling plate, and the specific fitting process will not be described here. Referring to the calculation process of the along-the-path loss parameter ΔP1, the cross-sectional loss parameter ΔP2 of the liquid cooling plate is obtained, wherein ΔP2 can be expressed as:

[0063]

[0064] Furthermore, according to the folded tube resistance coefficient ξ2, the folded tube loss parameter ΔP3 of the liquid cooling plate is determined, where the folded tube resistance coefficient ξ2 is related to the angle of the folded tube and can be obtained from relevant engineering manuals. Referring to the calculation process of the along-the-line loss parameter ΔP1, the folded tube loss parameter ΔP3 is obtained, where ΔP3 can be expressed as:

[0065]

[0066] Furthermore, the along-the-line loss parameter ΔP1, the cross-sectional loss parameter ΔP2, and the folded pipe loss parameter ΔP3 are superimposed to obtain a first pressure loss parameter of the cooling medium from the main road inlet to the branch road inlet.

[0067] For further details of step S203, please refer to the relevant contents in the above embodiment, which will not be repeated here.

[0068] S204, obtaining a flow section setting mode of the main path according to the first pressure loss parameter, and adjusting a cooling medium flow rate between the main path and the branch path of the liquid cooling plate according to the flow section setting mode and the first connection relationship.

[0069] In a feasible implementation, according to the first pressure loss parameter, the flow section setting mode of the main road is determined to be an equidistant tapered section; then, according to the distribution relationship between each branch, the arithmetic coefficient of the equidistant tapered section is determined. Based on the computational fluid dynamics model, the flow section setting mode and the first connection relationship are simulated, and the cooling medium is adjusted based on the simulation results. Among them, if the main road is located in the middle of the liquid cooling plate, the branches are distributed along both sides of the main road. As an example, on one side of the main road, n / 2 branches are set, wherein the branch next to the main road is the first branch, and the branch farthest from the main road is the n / 2 branch. There are (n / 2-1) branches between the first branch and the n / 2 branch, so there are (n / 2-1) losses along the way. Between the first branch and the n / 2 branch, there are (n / 2-1) secondary cross-sectional losses. The folded pipe loss between the first branch and the n / 2 branch can be obtained through the relevant engineering manual. Therefore, to maintain a balanced pressure drop between the 1st branch and the n / 2th branch, the following conditions must be met: [(n / 2-1)th along-the-way loss] + [(n / 2-1)th cross-sectional loss] + folded pipe loss of the n / 2th branch = folded pipe loss of the 1st branch.

[0070] Figure 5 Schematic diagram of the flow of cooling medium in the liquid cooling plate according to the embodiment of the present application. Figure 5 As shown, based on the simulation results, the cooling medium is adjusted, the flow of each branch is monitored through the sensing network, and the wall pressure between the branches of the liquid cooling plate is obtained in real time. Then, according to the pressure drop balance relationship between the branches, the cooling medium flow between the main road and the branches of the liquid cooling plate is adjusted to ensure the uniformity of the cooling medium flow between the branches.

[0071] For further details of step S204, please refer to the relevant contents in the above embodiment, which will not be repeated here.

[0072] The embodiment of the present application provides a method for regulating the flow uniformity of a liquid cooling plate. By determining the first pressure loss parameter of the cooling medium from the main inlet to the branch inlet and obtaining the flow section setting method of the main path, the flow of the cooling medium between the main path and the branch of the liquid cooling plate is regulated. Under the condition of the same heat exchange load and heat exchange area, the flow of parallel pipelines of the same shape and the same cross-sectional area is made uniform, so that the liquid cooling plate can more effectively and evenly cool the battery cells of the battery module, reduce the temperature difference between the battery cells, and improve the overall performance of the battery module.

[0073] Figure 3 This is a schematic diagram of the structure of a liquid cooling plate flow uniformity adjustment device provided in an embodiment of the present application. Figure 3 As shown, the liquid cooling plate flow uniformity regulating device 300 comprises:

[0074] A first acquisition module 301, the first acquisition module 301 is used to determine a first connection relationship between a main circuit and a branch circuit of a liquid cooling plate;

[0075] A second acquisition module 302, the second acquisition module 302 is used to determine a first pressure loss parameter of the cooling medium from the main road inlet to the branch road inlet according to the first connection relationship;

[0076] The regulating module 303 is used to obtain the flow section setting mode of the main path according to the first pressure loss parameter, and to regulate the cooling medium flow between the main path and the branch path of the liquid cooling plate according to the flow section setting mode and the first connection relationship.

[0077] Figure 6 The present invention is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present application. Figure 6 The electronic device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0078] like Figure 6 As shown, the electronic device 600 includes a processor 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a memory 606 to a random access memory (RAM) 603. Various programs and data required for the operation of the electronic device 600 are also stored in the RAM 603. The processor 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0079] The following components are connected to the I / O interface 605: a memory 606 including a hard disk, etc.; and a communication part 607 including a network interface card such as a LAN (Local Area Network) card, a modem, etc., and the communication part 607 performs communication processing via a network such as the Internet; a drive 608 is also connected to the I / O interface 605 as needed.

[0080] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 607. When the computer program is executed by the processor 601, the above-mentioned functions defined in the method of the present application are executed.

[0081] In an exemplary embodiment, a storage medium including instructions is also provided, such as a memory including instructions, and the instructions can be executed by the processor 601 of the electronic device 600 to complete the above method. Optionally, the storage medium can be a non-transitory computer-readable storage medium, for example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0082] In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, apparatus, or device. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0083] Figure 7 It is a schematic diagram of the structure of another electronic device provided according to an embodiment of the present application. Figure 7 The electronic device shown is only an example and should not limit the functions and scope of use of the embodiments of the present application. Figure 7 As shown, the electronic device 700 includes a processor 701 and a memory 702. The memory 702 is used to store program codes, and the processor 701 is connected to the memory 702 to read the program codes from the memory 702 to implement the liquid cooling plate flow uniformity adjustment method in the above embodiment.

[0084] Optionally, the number of processors 701 may be one or more.

[0085] Optionally, the electronic device may further include an interface 703, and the number of the interface 703 may be multiple. The interface 703 may be connected to an application program and may receive data from an external device such as a sensor.

[0086] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0087] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for adjusting flow uniformity of a liquid cooling plate, characterized in that: include: Determine a first connection relationship between a main circuit and a branch circuit of a liquid cooling plate; Determine a first pressure loss parameter of the cooling medium from the main path inlet to the branch path inlet according to the first connection relationship; According to the first pressure loss parameter, a flow section setting mode of the main path is obtained, and according to the flow section setting mode and the first connection relationship, a cooling medium flow rate between the main path and the branch path of the liquid cooling plate is adjusted; The determining of a first connection relationship between a main circuit and a branch circuit of the liquid cooling plate includes: According to the electrochemical reaction of the battery module, the thermal physical parameters of the battery module are obtained; According to the thermophysical property parameters, obtaining the heat generation rate of the battery module; According to the heat generation rate, a heat transfer model of the battery module is obtained; Determine a first connection relationship between a main circuit and a branch circuit of a liquid cooling plate according to a heat transfer model of a battery module; The step of obtaining a heat transfer model of the battery module according to the heat generation rate includes: According to the heat generation rate, obtaining a first correlation between the internal resistance of the battery module, the battery state of charge, and the battery module temperature; According to the first correlation, the charging and discharging process of the battery module is simulated to obtain a heat transfer model of the battery module; Determining the first connection relationship between the main circuit and the branch circuit of the liquid cooling plate according to the heat transfer model of the battery module includes: According to the heat transfer model of the battery module, determine the flow mode of the cooling medium between the battery module and the liquid cooling plate; According to the flow mode, determining the structure of the liquid cooling plate; According to the structural mode, determining a first connection relationship between the main circuit and the branch circuit of the liquid cooling plate; Determining a first pressure loss parameter of the cooling medium from the main inlet to the branch inlet according to the first connection relationship includes: According to the first connection relationship, the resistance coefficient along the path from the main road entrance to the branch road entrance is obtained; According to the first connection relationship, obtaining the cross-sectional resistance coefficient and the folded tube resistance coefficient of the liquid cooling plate; Determine a first pressure loss parameter of the cooling medium from the main road inlet to the branch road inlet according to the along-the-path resistance coefficient, the cross-sectional resistance coefficient and the folded pipe resistance coefficient; The method of obtaining a flow cross-section setting method of the main path according to the first pressure loss parameter includes: According to the first pressure loss parameter, determining that the flow cross section of the main path is set as an equidistant tapered cross section; Determine the arithmetic coefficient of the equidistant tapered cross section according to the distribution relationship between the branches; The adjusting the cooling medium flow between the main circuit and the branch circuit of the liquid cooling plate according to the flow cross section setting mode and the first connection relationship includes: Based on a computational fluid dynamics model, the flow section setting method and the first connection relationship are simulated, And based on the simulation results, the cooling medium is adjusted.

2. The method according to claim 1, characterized in that Determining a first pressure loss parameter of the cooling medium from the main road inlet to the branch road inlet according to the along-the-path resistance coefficient, the cross-sectional resistance coefficient and the folded pipe resistance coefficient includes: According to the resistance coefficient along the way, determining the loss parameter of the cooling medium from the main road inlet to the branch road inlet; Determining a cross-sectional loss parameter of the liquid cooling plate according to the cross-sectional resistance coefficient; Determining a folded tube loss parameter of the liquid cooling plate according to the folded tube resistance coefficient; The along-the-path loss parameter, the cross-sectional loss parameter and the folded pipe loss parameter are superimposed to obtain a first pressure loss parameter of the cooling medium from the main road inlet to the branch road inlet.

3. The method according to claim 2, characterized in that Determining the cross-sectional loss parameter of the liquid cooling plate according to the cross-sectional resistance coefficient includes: Obtaining a first proportional relationship between a main road entrance cross section and a branch road entrance cross section; Based on the fitting operation of the three-dimensional model of the liquid cooling plate to the first proportional relationship, the cross-sectional loss parameter of the liquid cooling plate is obtained.

4. A liquid cooling plate flow uniformity regulating device, characterized in that: The method according to any one of claims 1 to 3 above comprises: A first acquisition module, the first acquisition module is used to determine a first connection relationship between a main circuit and a branch circuit of the liquid cooling plate; A second acquisition module, the second acquisition module is used to determine a first pressure loss parameter of the cooling medium from the main road inlet to the branch road inlet according to the first connection relationship; The regulating module is used to obtain the flow section setting mode of the main path according to the first pressure loss parameter, and to regulate the cooling medium flow between the main path and the branch path of the liquid cooling plate according to the flow section setting mode and the first connection relationship.

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