Method and device for determining position information of variable cross-section flow channel

Abstract

The present application relates to a method and device for determining the position information of a variable-section flow channel. The method includes: determining the position information of streamlines based on cooling plate parameters and coolant mass flow, and then determining the position information of the flow channel in combination with preset flow channel parameters; screening the target flow channel in the flow channel in combination with preset merging rules, and determining the position information of the diversion starting point, the position information of the diversion ending point, and the position information of the merging point corresponding to the target flow channel in turn, and then determining the position information of the variable-section flow channel based on the above information. The variable-section flow channel position information can be used to generate a variable-section flow channel. The variable-section flow channel obtained by this method based on streamlines can ensure that the flow velocity of the coolant in the variable-section flow channel is uniformly distributed. The variable-section flow channel obtained by merging the target flow channels according to the preset merging rules can effectively increase the flow velocity of the coolant in the variable-section flow channel and improve the heat exchange efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of flow channel design, and in particular to a method and device for determining position information of a variable cross-section flow channel. Background Art

[0002] Lithium-ion batteries, due to their excellent energy density and cycle life, have become the preferred choice for electric vehicle development. However, they are highly sensitive to temperature changes, which can affect their internal resistance, chemical reactions, cycle life, efficiency, reliability, and safety. During discharge, electrochemical reactions and resistance within lithium-ion batteries generate significant heat, potentially leading to overheating, damage, and accidents. Therefore, it is essential to employ a battery thermal management system to control the battery's temperature within an acceptable range.

[0003] In the prior art, streamlined coolant flow channels are often used in battery thermal management systems. Although streamlined flow channels have good temperature uniformity, they also slow down the overall coolant propulsion speed in the flow channels, slowing down the heat exchange rate. Summary of the Invention

[0004] Based on this, it is necessary to provide a method and device for determining the position information of a variable cross-section flow channel to address the problem of slow heat exchange rate of the existing streamlined coolant flow channel in the prior art.

[0005] In a first aspect, the present application provides a method for determining position information of a variable cross-section flow channel. The method comprises:

[0006] Determine the position information of the streamlines according to the cooling plate parameters and the coolant mass flow rate;

[0007] Determining the position information of the flow channel according to the preset flow channel parameters and the position information of the streamline;

[0008] Filtering a target flow channel from the flow channels according to the preset flow channel parameters, the position information of the flow channels, and a preset merging rule, and determining position information of a diversion starting point and a diversion ending point corresponding to the target flow channel according to the position information of the target flow channel;

[0009] Determining position information of a merging point according to the cooling plate parameters and the position information of the target flow channel;

[0010] The variable cross-section flow channel position information is determined based on the flow channel position information, the diversion start point position information, the diversion end point position information and the merging point position information. The variable cross-section flow channel position information is used to generate the variable cross-section flow channel.

[0011] In one embodiment, the preset flow channel parameters include flow channel width and flow channel number, and determining the flow channel position information based on the preset flow channel parameters and the streamline position information includes:

[0012] Determining the position information of the target streamlines of the flow channel from the streamline position information;

[0013] The position information of the flow channel is determined according to the flow channel width and the position information of the target streamline.

[0014] In one embodiment, the preset flow channel parameters include the number of flow channels, and screening the target flow channels from the flow channels according to the preset flow channel parameters, the position information of the flow channels, and the preset merging rules includes:

[0015] Sorting the flow channels and determining a sequence number corresponding to each flow channel;

[0016] If the number of the flow channels is even, the flow channels corresponding to the two serial numbers in the middle position are used as the target flow channels;

[0017] If the number of flow channels is an odd number, the flow channels corresponding to the middle number and the two adjacent numbers are used as target flow channels.

[0018] In one embodiment, determining the position information of the diversion starting point and the position information of the diversion ending point corresponding to the target flow channel according to the position information of the target flow channel includes:

[0019] determining the position information of the diversion starting point according to first ratio information, the position information of the flow channel inlet, and the flow channel length, wherein the first ratio information includes the ratio of the distance between the diversion starting point and the flow channel inlet to the flow channel length;

[0020] The position information of the diversion end point is determined according to the second ratio information, the flow channel length and the position information of the diversion starting point, wherein the second ratio information includes the ratio between the distance between the diversion starting point and the diversion end point and the flow channel length.

[0021] In one embodiment, the cooling plate parameters include position information of the center of the cooling plate, and determining the position information of the merging point based on the cooling plate parameters and the position information of the target flow channel includes:

[0022] If the number of the flow channels is even, the center of the cooling plate is used as the merging point, and the position information of the merging point is determined according to the position information of the center of the cooling plate;

[0023] If the number of flow channels is odd, the center of the cooling plate is used as the center of the isosceles right triangle, and the position information of the merging point is determined on each target flow channel respectively, wherein the corresponding merging point on the target flow channel located in the middle position is the right-angled vertex of the isosceles right triangle, and the two corresponding merging points located on the two adjacent target flow channels are symmetrical about the target flow channel located in the middle position.

[0024] In one embodiment, the cooling plate parameters include the coolant inlet width and the coolant outlet width, the preset flow channel parameters include the flow channel width, the coolant inlet width, the coolant outlet width and the flow channel width are equal, and the spacing between each of the flow channels is equal.

[0025] In a second aspect, the present application provides a device for determining position information of a variable cross-section flow channel, the device comprising:

[0026] A streamline position information determination module is used to determine streamline position information based on cooling plate parameters and coolant mass flow rate;

[0027] a flow channel position determination module, configured to determine the position information of the flow channel according to preset flow channel parameters and the position information of the streamline;

[0028] a diversion point determination module, configured to screen a target flow channel from the flow channels according to the preset flow channel parameters, the position information of the flow channels, and a preset merging rule, and determine the position information of the diversion starting point and the position information of the diversion ending point corresponding to the target flow channel according to the position information of the target flow channel;

[0029] a merging point determination module, configured to determine position information of a merging point according to the cooling plate parameters and the position information of the target flow channel;

[0030] The variable cross-section flow channel determination module is used to determine the variable cross-section flow channel position information based on the flow channel position information, the diversion starting point position information, the diversion end point position information and the merging point position information. The variable cross-section flow channel position information is used to generate the variable cross-section flow channel.

[0031] In one embodiment, the preset flow channel parameters include flow channel width and flow channel number, and the flow channel position determination module is specifically configured to:

[0032] Determining the position information of the target streamlines of the flow channel from the streamline position information;

[0033] The position information of the flow channel is determined according to the flow channel width and the position information of the target streamline.

[0034] In one embodiment, the preset flow channel parameters include the number of flow channels, and the diversion point determination module is specifically configured to:

[0035] Sorting the flow channels and determining a sequence number corresponding to each flow channel;

[0036] If the number of the flow channels is even, the flow channels corresponding to the two serial numbers in the middle position are used as the target flow channels;

[0037] If the number of flow channels is an odd number, the flow channels corresponding to the middle number and the two adjacent numbers are used as target flow channels.

[0038] In one embodiment, the diversion point determination module is specifically configured to:

[0039] determining the position information of the diversion starting point according to first ratio information, the position information of the flow channel inlet, and the flow channel length, wherein the first ratio information includes the ratio of the distance between the diversion starting point and the flow channel inlet to the flow channel length;

[0040] The position information of the diversion end point is determined according to the second ratio information, the flow channel length and the position information of the diversion starting point, wherein the second ratio information includes the ratio between the distance between the diversion starting point and the diversion end point and the flow channel length.

[0041] In one embodiment, the merging point determination module is specifically configured to:

[0042] If the number of the flow channels is even, the center of the cooling plate is used as the merging point, and the position information of the merging point is determined according to the position information of the center of the cooling plate;

[0043] If the number of flow channels is odd, the center of the cooling plate is used as the center of the isosceles right triangle, and the position information of the merging point is determined on each target flow channel respectively, wherein the corresponding merging point on the target flow channel located in the middle position is the right-angled vertex of the isosceles right triangle, and the two corresponding merging points located on the two adjacent target flow channels are symmetrical about the target flow channel located in the middle position.

[0044] In one embodiment, the cooling plate parameters include the coolant inlet width and the coolant outlet width, the preset flow channel parameters include the flow channel width, the coolant inlet width, the coolant outlet width and the flow channel width are equal, and the spacing between each of the flow channels is equal.

[0045] In a third aspect, the present application further provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps described in the first aspect when executing the computer program.

[0046] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps described in the first aspect.

[0047] In a fifth aspect, the present application further provides a computer program product, which includes a computer program that implements the steps described in the first aspect when executed by a processor.

[0048] In the above-mentioned method for determining the position information of a variable-section flow channel, the position information of the streamlines is determined based on the cooling plate parameters and the coolant mass flow rate. Then, combined with the preset flow channel parameters, the position information of the flow channel can be determined. Combined with the preset merging rules, the target flow channel is screened in the flow channel, and the position information of the diversion starting point, the position information of the diversion ending point, and the position information of the merging point corresponding to the target flow channel are determined in sequence. Then, based on the above information, the position information of the variable-section flow channel is determined. This variable-section flow channel position information can be used to generate a variable-section flow channel. By using this method, a variable-section flow channel is obtained by merging the target flow channels based on streamlines and using preset merging rules. This can effectively increase the coolant flow rate in the variable-section flow channel and improve the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0050] Figure 1 is a flow chart of a method for determining position information of a variable-cross-section flow channel in one embodiment;

[0051] Figure 2 is a flow chart of a method for determining position information of a flow channel in another embodiment;

[0052] Figure 3 is a flow chart of a method for determining position information of a merging point in another embodiment;

[0053] Figure 4 A schematic structural diagram of a variable cross-section flow channel in one embodiment;

[0054] Figure 5 A schematic structural diagram of a variable cross-section flow channel in another embodiment;

[0055] Figure 6 A structural block diagram of a method and apparatus for determining position information of a variable-cross-section flow channel according to an embodiment;

[0056] Figure 7 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0058] In recent years, the use of traditional fuel vehicles has led to energy crises and environmental pollution. To achieve carbon neutrality, countries around the world are increasingly committed to developing hybrid and pure electric vehicles. Lithium-ion batteries, due to their excellent energy density and cycle life, have become the preferred choice for electric vehicle development. However, lithium-ion batteries are highly sensitive to temperature changes, which can affect their internal resistance, chemical reactions, cycle life, efficiency, reliability, and safety. During discharge, lithium-ion batteries generate a large amount of heat due to electrochemical reactions and resistance, which can lead to overheating, damage, and accidents. Therefore, it is necessary to implement a battery thermal management system (BTMS) to control the temperature within an acceptable range. Currently, liquid cooling is considered a very effective method in practice. By adjusting the channel structure parameters of the liquid cooling plate and the flow conditions of the liquid working fluid, the optimal cooling effect can be achieved under the corresponding conditions. In practical battery modules, the cells are separated by cooling plates. The cells are rectangular, and the coolant inlet is uniformly located on the battery tab. The heat generated by the cells is transferred to the cooling plate through contact, and the coolant flows through the channels within the cooling plate to achieve heat exchange.

[0059] Building on the design of traditional liquid cooling plates, researchers shifted their focus from straight and parallel channels to irregularly shaped channels, incorporating the external streamlined design of automotive, aerospace, and submarine systems into battery flow channel design. This design successfully reduced flow resistance. However, while conventional streamlined channels improve temperature uniformity, they also slow the overall coolant flow rate within the channel, hindering heat transfer.

[0060] In one embodiment of the present application, Figure 1As shown, the present application provides a method for determining the position information of a variable cross-section flow channel. This embodiment uses the method applied to a terminal as an example for illustration. It is understandable that the method can also be applied to a server, and can also be applied to a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. Among them, the terminal can be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, Internet of Things devices, etc. The server can be implemented as an independent server or a server cluster composed of multiple servers. In this embodiment, the method includes the following steps:

[0061] Step 101: Determine the position information of the streamline according to the cooling plate parameters and the mass flow rate of the coolant.

[0062] Among them, the cooling plate parameters include but are not limited to the cooling plate length, width, thickness, coolant inlet and outlet positions, coolant inlet and outlet width, cooling plate front and rear side wall thickness, and cooling plate side wall thickness with large area contact with the battery.

[0063] Specifically, the terminal models the initial cooling plate model based on the length, width, and thickness of the flow channel plate (i.e., cooling plate) to be designed. The terminal then determines the thin-walled structure of the cooling plate based on the coolant inlet and outlet locations, coolant inlet and outlet widths, the width of the front and rear sidewalls of the cooling plate, and the thickness of the contact surface between the cooling plate and the battery. The internal space encompassed by the thin-walled structure of the cooling plate is the fluid domain space. Based on the coolant mass flow rate, the terminal extracts coolant particle trajectories within the fluid domain space to determine the positional information of streamlines within the fluid domain space.

[0064] In one embodiment of the present application, the cooling plate measures 118mm × 63mm × 2mm, and the cross-sectional dimensions of the coolant inlet at the cooling plate are 3mm × 1mm. First, the solid cooling plate is hollowed out. The inlet and outlet locations and the front and rear side walls are 2mm thick, and the side wall in contact with the large battery surface is 0.5mm thick. The width of a single flow channel within the cooling plate is the same as the inlet and outlet, and the entire internal area of the cooling plate is a fluid domain. A coolant mass flow rate of 0.001kg / s is given. The terminal extracts coolant particle trajectories and determines the position information of the streamlines.

[0065] Step 102 : determining the position information of the flow channel according to the preset flow channel parameters and the position information of the streamlines.

[0066] The preset flow channel parameters may include the number of flow channels and the flow channel width. The number of flow channels is a positive integer greater than or equal to one.

[0067] Specifically, the terminal can select target streamlines based on the number of flow channels. The number of target streamlines is equal to the number of flow channels, and the target streamlines are symmetrical about the coolant inlet and outlet lines. After determining the position of the target streamlines, the terminal translates the target streamlines equidistantly based on the flow channel width to obtain the flow channel position information. The translation distance can be equal to the flow channel width.

[0068] Step 103 , based on preset channel parameters, channel position information and preset merging rules, a target channel is selected from the channels, and based on the position information of the target channel, the position information of the diversion start point and the position information of the diversion end point corresponding to the target channel are determined.

[0069] The preset merging rules may include the relationship between the number of flow channels before and after merging, the positional relationship between the target flow channel and the flow channels, and the positional relationship between the diversion starting point, the diversion ending point, and the target flow channel.

[0070] Specifically, when the number of flow channels before merging is M and the number of flow channels after merging is N, and the target flow channel is the flow channel located in the middle, the terminal selects a corresponding number of flow channels from the flow channels located in the middle as the target flow channel, and determines the diversion starting point and diversion ending point based on the relationship between the diversion starting point and diversion ending point and the target flow channel. The terminal can merge the M target flow channels into N flow channels based on the positional relationship between the diversion starting point, diversion ending point, and the target flow channel.

[0071] Step 104 : determining the position information of the merging point according to the cooling plate parameters and the position information of the target flow channel.

[0072] Specifically, during the process of merging the target flow channels, if a merge point exists, the flow channels are merged at that point. For symmetry reasons, the location of the merge point is correlated with the center of symmetry of the cooling plate. In one embodiment, the terminal uses the center of symmetry of the cooling plate as the merge point. The terminal may also determine corresponding merge points in the target flow channels, where each merge point forms a geometric figure, and the terminal uses the center of symmetry of the cooling plate as the center of the geometric figure.

[0073] Step 105 , determining the variable cross-section flow channel position information based on the flow channel position information, the diversion start point position information, the diversion end point position information and the merging point position information, and the variable cross-section flow channel position information is used to generate the variable cross-section flow channel.

[0074] The variable cross-section flow channel is an integral flow channel structure including a common streamlined flow channel and a merged flow channel, wherein the merged flow channel is obtained by merging the common streamlined flow channel.

[0075] Specifically, after determining the position information of the flow channel, the position information of the diversion starting point, the position information of the diversion ending point, and the position information of the merging point, the terminal can determine the position information of the target flow channel after merging, model the variable cross-section flow channel, and appropriately stretch and smooth the curve corresponding to the flow channel during the modeling process. The terminal can process the variable cross-section flow channel based on the variable cross-section flow channel model. This processing method includes but is not limited to 3D printing of the variable cross-section flow channel model determined according to the above process, and application in the battery thermal management system.

[0076] In one embodiment of the present application, the generation of variable cross-section flow channel position information involves a process of flow channel merging. This process increases the coolant flow rate in the merged flow channel, thereby accelerating convective heat transfer. The flow channel before merging is based on a streamline design, which makes the coolant evenly distributed when entering the flow channel. Therefore, the flow rate of the above-mentioned variable cross-section flow channel is evenly distributed at the inlet position, and the confluence structure in the second half accelerates heat exchange, effectively improving the heat exchange effect.

[0077] In the above-mentioned method for determining the position information of a variable-section flow channel, the position information of the streamlines is determined based on the cooling plate parameters and the coolant mass flow rate. Then, combined with the preset flow channel parameters, the position information of the flow channel can be determined. Combined with the preset merging rules, the target flow channel is screened in the flow channel, and the position information of the diversion starting point, the position information of the diversion ending point, and the position information of the merging point corresponding to the target flow channel are determined in sequence. Then, based on the above information, the position information of the variable-section flow channel is determined. This variable-section flow channel position information can be used to generate a variable-section flow channel. By using this method, a variable-section flow channel is obtained by merging the target flow channels based on streamlines and using preset merging rules. This can effectively increase the coolant flow rate in the variable-section flow channel and improve the heat exchange efficiency.

[0078] In one embodiment of the present application, Figure 2 As shown, the preset flow channel parameters include the flow channel width and the number of flow channels. In the above step 102, the flow channel position information is determined based on the preset flow channel parameters and the streamline position information, including:

[0079] Step 201 : Determine the position information of target streamlines of the number of flow channels in the streamline position information.

[0080] Specifically, the terminal determines the parameter information of the target streamlines of the number of flow channels based on the number of flow channels and the position information of the streamlines. In the process of determining the target streamlines, the spacing between each target streamline is equal. It is necessary to ensure that the target streamline is an axisymmetric structure, and the symmetry axis of the target streamline is completely consistent with the symmetry axis of the cooling plate.

[0081] Step 202 : determining the position information of the flow channel according to the flow channel width and the position information of the target streamline.

[0082] Specifically, the terminal uses the target streamline as the center line of the flow channel and translates the target streamline to both sides at equal distances, where the translation distance is half the flow channel width, thereby constructing the flow channel inside the cooling plate.

[0083] In the aforementioned method for determining the position of variable-section flow channels, the flow channel construction process is designed based on streamlined distribution. As a result, the coolant flow velocity distribution in each flow channel is relatively uniform. Furthermore, streamlined flow channels can effectively reduce the impact of water on the flow channel, thereby reducing unnecessary energy loss.

[0084] In one embodiment of the present application, the preset flow channel parameters include the number of flow channels. In step 103, screening the target flow channel from the flow channels according to the preset flow channel parameters, the position information of the flow channels, and the preset merging rule includes:

[0085] Sort the flow channels and determine the sequence number corresponding to each flow channel;

[0086] If the number of flow channels is even, the flow channels corresponding to the two numbers in the middle position are used as the target flow channels;

[0087] If the number of flow channels is odd, the flow channels corresponding to the middle number and the two adjacent numbers are taken as the target flow channels.

[0088] Specifically, the preset merging rules may include the relationship between the number of flow channels before and after the merge, wherein the difference in the number of flow channels before and after the merge is one. The screening conditions of the target flow channel are correlated with the number of flow channels. After sorting the flow channels in sequence, the terminal determines the serial number corresponding to each flow channel and the sequence formed by each serial number. Under the condition that the number of flow channels is an even number, the flow channels corresponding to the two serial numbers located in the middle position of the sequence are the target flow channels, and the two target flow channels are merged into a new flow channel; under the condition that the number of flow channels is an odd number, the flow channels corresponding to a serial number located in the middle position of the sequence and the two adjacent serial numbers are the target flow channels, and the flow channel located in the middle position is merged with the two adjacent flow channels, and the two adjacent flow channels are retained after the merger.

[0089] In the above-mentioned process of merging the flow channels, since the number of flow channels becomes smaller after the flow channels are merged, the flow rate of the coolant in the merged flow channels becomes faster, which accelerates the convective heat transfer and can effectively improve the heat transfer effect.

[0090] In one embodiment of the present application, the above step 103, determining the position information of the diversion starting point and the position information of the diversion ending point corresponding to the target flow channel according to the position information of the target flow channel, includes:

[0091] Determining the position information of the diversion starting point according to the first ratio information, the position information of the flow channel inlet, and the flow channel length, wherein the first ratio information includes the ratio of the distance between the diversion starting point and the flow channel inlet to the flow channel length;

[0092] The position information of the diversion end point is determined according to the second ratio information, the flow channel length and the position information of the diversion start point. The second ratio information includes the ratio between the distance between the diversion start point and the diversion end point and the flow channel length.

[0093] The diversion starting point is the point on the target flow channel where the merging begins, and the diversion ending point is the point on the flow channel obtained after the target flow channel completes the merging.

[0094] Specifically, the terminal can establish a coordinate axis with the cooling plate, wherein the center of the cooling plate is the origin of the coordinate axis, the length direction of the cooling plate (consistent with the flow direction of the coolant) is the X-axis, and the width direction of the cooling plate is the Y-axis. The first proportion information includes the ratio of the horizontal distance along the X-axis direction between the diversion starting point and the flow channel inlet and the flow channel length. The second proportion information includes the ratio between the horizontal distance along the X-axis direction between the diversion starting point and the diversion end point and the flow channel length. The first proportion information and the second proportion information can be set according to the situation. In order to consider symmetry, the ratio of the horizontal distance along the X-axis direction between the diversion starting point and the flow channel inlet and the flow channel length can be set to 1:3, or the ratio between the horizontal distance along the X-axis direction between the diversion starting point and the diversion end point and the flow channel length can be set to 1:3.

[0095] Please also see Figure 4 In the figure, A1, A2, A3, and A4 are the diversion starting points, and B1 and B2 are the diversion ending points. If the number of flow channels is even, the terminal determines the locations of the four diversion starting points on the two target flow channels based on the first ratio information. Next, a new reference flow channel is established with the Y-axis as the centerline and the flow channel width as the centerline. The locations of the two diversion ending points are determined on this reference flow channel based on the second ratio information.

[0096] Please also see Figure 5 In the figure, A5 and A6 are the diversion starting points, and B3 and B4 are the diversion ending points. If the number of flow channels is odd, the terminal determines the location information of two diversion starting points on the target flow channel located in the middle based on the first proportional information. It also determines the location information of two diversion ending points on the flow channels located on both sides of the middle, close to the middle target flow channel, based on the second proportional information.

[0097] In one embodiment of the present application, Figure 3 As shown, the cooling plate parameters include the position information of the cooling plate center. In the above step 104, the position information of the merging point is determined based on the cooling plate parameters and the position information of the target flow channel, including:

[0098] Step 301: If the number of flow channels is even, the center of the cooling plate is used as the merging point, and the position information of the merging point is determined based on the position information of the center of the cooling plate;

[0099] Step 302: If the number of flow channels is odd, the center of the cooling plate is used as the center of the isosceles right triangle, and the position information of the merging point is determined on each target flow channel respectively, wherein the corresponding merging point on the target flow channel located in the middle position is the right-angled vertex of the isosceles right triangle, and the two corresponding merging points on the two adjacent target flow channels are symmetrical about the target flow channel located in the middle position.

[0100] Please also see Figure 4 In the figure, C1 is the merging point. When the number of flow channels is even, the terminal uses the center of the cooling plate as the origin of the coordinate axis and directly uses the center of the cooling plate as the flow channel merging point. The terminal can merge the target flow channels based on the position information of the merging point and determine the position information of the variable-section flow channel after the merging.

[0101] Please also see Figure 5 In the figure, C2, C3, and C4 are merging points. If the number of flow channels is odd, the terminal determines the locations of the three corresponding merging points on each of the three target flow channels. These three merging points form an isosceles right triangle, with the center of the cooling plate at the center of the triangle. The merging point corresponding to the target flow channel in the middle is the right-angled vertex of the triangle, and the merging points corresponding to the target flow channels on both sides are symmetrical about the X-axis.

[0102] In the process of determining the above merging points, the three merging points with an odd number of flow channels form an isosceles right triangle. When the water flows through the diversion point, the pressure impact on the flow channel is relatively small.

[0103] In one embodiment of the present application, the cooling plate parameters include the coolant inlet width and the coolant outlet width, the preset flow channel parameters include the flow channel width, the coolant inlet width, the coolant outlet width and the flow channel width are all equal, and the spacing between each flow channel is equal.

[0104] In the above-mentioned method for determining the position information of the variable-section flow channel, the coolant inlet and outlet widths, the flow channel width, and the widths before and after the flow channels are merged are all equal, and the variable-section flow channel structure formed is a structure symmetrical about the X-axis. Therefore, the variable-section flow channel involved in this application, when applied to the battery thermal management system, will make the temperature uniformity of the battery surface good and also improve the heat exchange efficiency.

[0105] It should be understood that, although the steps in the flowcharts of the above embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts of the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0106] Based on the same inventive concept, the embodiments of the present application also provide a device for determining the position information of a variable cross-section flow channel for implementing the method for determining the position information of a variable cross-section flow channel involved above. The implementation solution provided by this device is similar to the implementation solution described in the above method. Therefore, the specific limitations of one or more embodiments of the device for determining the position information of a variable cross-section flow channel provided below can be found in the limitations of the method for determining the position information of a variable cross-section flow channel described above, and will not be repeated here.

[0107] like Figure 6 As shown, in one embodiment of the present application, a device 600 for determining position information of a variable cross-section flow channel is provided, comprising: a streamline position information determination module 610, a flow channel position determination module 620, a diverging point determination module 630, a merging point determination module 640, and a variable cross-section flow channel determination module 650, wherein:

[0108] Streamline position information determination module 610, for determining streamline position information based on cooling plate parameters and coolant mass flow rate;

[0109] A flow channel position determination module 620 is configured to determine the position information of the flow channel according to preset flow channel parameters and the position information of the streamline;

[0110] a diversion point determination module 630 for screening a target flow channel from the flow channels according to the preset flow channel parameters, the position information of the flow channels, and a preset merging rule, and determining the position information of the diversion start point and the position information of the diversion end point corresponding to the target flow channel according to the position information of the target flow channel;

[0111] A merging point determination module 640 is configured to determine the position information of the merging point according to the cooling plate parameters and the position information of the target flow channel;

[0112] The variable cross-section flow channel determination module 650 is used to determine the variable cross-section flow channel position information based on the flow channel position information, the diversion starting point position information, the diversion end point position information and the merging point position information. The variable cross-section flow channel position information is used to generate the variable cross-section flow channel.

[0113] In one embodiment of the present application, the preset flow channel parameters include flow channel width and the number of flow channels, and the flow channel position determination module 620 is specifically configured to:

[0114] Determining the position information of the target streamlines of the flow channel from the streamline position information;

[0115] The position information of the flow channel is determined according to the flow channel width and the position information of the target streamline.

[0116] In one embodiment of the present application, the preset flow channel parameters include the number of flow channels, and the diversion point determination module 630 is specifically configured to:

[0117] Sorting the flow channels and determining a sequence number corresponding to each flow channel;

[0118] If the number of the flow channels is even, the flow channels corresponding to the two serial numbers in the middle position are used as the target flow channels;

[0119] If the number of flow channels is an odd number, the flow channels corresponding to the middle number and the two adjacent numbers are used as target flow channels.

[0120] In one embodiment of the present application, the diversion point determination module 630 is specifically configured to:

[0121] determining the position information of the diversion starting point according to first ratio information, the position information of the flow channel inlet, and the flow channel length, wherein the first ratio information includes the ratio of the distance between the diversion starting point and the flow channel inlet to the flow channel length;

[0122] The position information of the diversion end point is determined according to the second ratio information, the flow channel length and the position information of the diversion starting point, wherein the second ratio information includes the ratio between the distance between the diversion starting point and the diversion end point and the flow channel length.

[0123] In one embodiment of the present application, the merge point determination module 640 is specifically configured to:

[0124] If the number of the flow channels is even, the center of the cooling plate is used as the merging point, and the position information of the merging point is determined according to the position information of the center of the cooling plate;

[0125] If the number of flow channels is odd, the center of the cooling plate is used as the center of the isosceles right triangle, and the position information of the merging point is determined on each target flow channel respectively, wherein the corresponding merging point on the target flow channel located in the middle position is the right-angled vertex of the isosceles right triangle, and the two merging points located on two adjacent target flow channels are symmetrical about the target flow channel located in the middle position.

[0126] In one embodiment of the present application, the cooling plate parameters include the coolant inlet width and the coolant outlet width, the preset flow channel parameters include the flow channel width, the coolant inlet width, the coolant outlet width and the flow channel width are all equal, and the spacing between each of the flow channels is equal.

[0127] Each module of the apparatus for determining the position information of a variable-section flow channel may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0128] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 7 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for determining the position information of a variable cross-section flow channel is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad provided on the computer device housing, or an external keyboard, touchpad or mouse.

[0129] Those skilled in the art will understand that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0130] In one embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0131] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0132] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0133] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0134] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program. The above-mentioned computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0135] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0136] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for determining position information of a variable cross-section flow channel, characterized in that: include: Determine the position information of the streamlines according to the cooling plate parameters and the coolant mass flow rate; Determining the position information of the flow channel according to the preset flow channel parameters and the position information of the streamline; Filtering a target flow channel from the flow channels according to the preset flow channel parameters, the position information of the flow channels, and a preset merging rule, and determining position information of a diversion starting point and a diversion ending point corresponding to the target flow channel according to the position information of the target flow channel; Determining position information of a merging point according to the cooling plate parameters and the position information of the target flow channel; Determine the variable cross-section flow channel position information according to the flow channel position information, the diversion start point position information, the diversion end point position information and the merging point position information, wherein the variable cross-section flow channel position information is used to generate the variable cross-section flow channel; The preset flow channel parameters include the number of flow channels, and screening the target flow channels from the flow channels according to the preset flow channel parameters, the position information of the flow channels, and the preset merging rules includes: Sorting the flow channels and determining a sequence number corresponding to each flow channel; If the number of the flow channels is even, the flow channels corresponding to the two serial numbers in the middle position are used as the target flow channels; If the number of flow channels is odd, the flow channels corresponding to the middle number and the two adjacent numbers are used as target flow channels; The step of determining the position information of the diversion starting point and the position information of the diversion ending point corresponding to the target flow channel according to the position information of the target flow channel includes: determining the position information of the diversion starting point according to first ratio information, the position information of the flow channel inlet, and the flow channel length, wherein the first ratio information includes the ratio of the distance between the diversion starting point and the flow channel inlet to the flow channel length; The position information of the diversion end point is determined according to the second ratio information, the flow channel length and the position information of the diversion starting point, wherein the second ratio information includes the ratio between the distance between the diversion starting point and the diversion end point and the flow channel length.

2. The method for determining the position information of a variable cross-section flow channel according to claim 1, wherein: The preset flow channel parameters include flow channel width and flow channel number, and determining flow channel position information according to the preset flow channel parameters and the streamline position information includes: Determining the position information of the target streamlines of the flow channel from the streamline position information; The position information of the flow channel is determined according to the flow channel width and the position information of the target streamline.

3. The method for determining position information of a variable cross-section flow channel according to claim 1, wherein: The cooling plate parameters include position information of the center of the cooling plate, and determining the position information of the merging point according to the cooling plate parameters and the position information of the target flow channel includes: If the number of the flow channels is even, the center of the cooling plate is used as the merging point, and the position information of the merging point is determined according to the position information of the center of the cooling plate; If the number of flow channels is odd, the center of the cooling plate is used as the center of the isosceles right triangle, and the position information of the merging point is determined on each target flow channel respectively, wherein the corresponding merging point on the target flow channel located in the middle position is the right-angled vertex of the isosceles right triangle, and the two corresponding merging points located on the two adjacent target flow channels are symmetrical about the target flow channel located in the middle position.

4. The method for determining position information of a variable cross-section flow channel according to claim 1, wherein: The cooling plate parameters include the coolant inlet width and the coolant outlet width, and the preset flow channel parameters include the flow channel width. The coolant inlet width, the coolant outlet width and the flow channel width are all equal, and the spacing between each of the flow channels is equal.

5. A device for determining position information of a variable cross-section flow channel, characterized in that: The device comprises: A streamline position information determination module is used to determine streamline position information based on cooling plate parameters and coolant mass flow rate; a flow channel position determination module, configured to determine the position information of the flow channel according to preset flow channel parameters and the position information of the streamline; a diversion point determination module, configured to screen a target flow channel from the flow channels according to the preset flow channel parameters, the position information of the flow channels, and a preset merging rule, and determine the position information of the diversion starting point and the position information of the diversion ending point corresponding to the target flow channel according to the position information of the target flow channel; a merging point determination module, configured to determine position information of a merging point according to the cooling plate parameters and the position information of the target flow channel; a variable cross-section flow channel determination module, configured to determine the position information of the variable cross-section flow channel based on the position information of the flow channel, the position information of the divergence starting point, the position information of the divergence ending point, and the position information of the merging point, wherein the position information of the variable cross-section flow channel is used to generate the variable cross-section flow channel; Wherein, the preset flow channel parameters include the number of flow channels, and the diversion point determination module is specifically used to sort the flow channels and determine the sequence number corresponding to each of the flow channels; If the number of the flow channels is even, the flow channels corresponding to the two serial numbers in the middle position are used as the target flow channels; If the number of flow channels is odd, the flow channels corresponding to the middle number and the two adjacent numbers are used as target flow channels; The diversion point determination module is specifically configured to determine the position information of the diversion starting point based on first ratio information, the position information of the flow channel inlet, and the flow channel length, wherein the first ratio information includes the ratio of the distance between the diversion starting point and the flow channel inlet to the flow channel length; The position information of the diversion end point is determined according to the second ratio information, the flow channel length and the position information of the diversion starting point, wherein the second ratio information includes the ratio between the distance between the diversion starting point and the diversion end point and the flow channel length.

6. The device according to claim 5, characterized in that The preset flow channel parameters include flow channel width and flow channel number, and the flow channel position determination module is specifically used to determine the position information of the target streamlines of the number of flow channels from the streamline position information; The position information of the flow channel is determined according to the flow channel width and the position information of the target streamline.

7. The device according to claim 5, characterized in that The merging point determination module is specifically configured to, if the number of the flow channels is an even number, use the center of the cooling plate as the merging point and determine the position information of the merging point according to the position information of the center of the cooling plate; If the number of flow channels is odd, the center of the cooling plate is used as the center of the isosceles right triangle, and the position information of the merging point is determined on each target flow channel respectively, wherein the corresponding merging point on the target flow channel located in the middle position is the right-angled vertex of the isosceles right triangle, and the two corresponding merging points located on the two adjacent target flow channels are symmetrical about the target flow channel located in the middle position.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

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