Simulation method for adding embedded bridging bus bar

Abstract

The invention discloses a simulation method for adding an embedded bridging bus bar, which is applied to the technical field of computer simulation, realizes the crossing of the scheme of adding the embedded bridging bus bar on a PCB (Printed Circuit Board) for simulation from zero to existence, is simple to operate, high in applicability and wide in application, automatically processes the embedding depth of the bus bar, and improves the simulation efficiency. The position of the model of the bus bar is automatically identified, the power supply network of the contact surface of the model is electrically connected, integrated modeling and simulation of the bus bar and the PCB are realized, the problem that a user cannot electrically connect two different power supply networks due to insufficient design allowance is solved, the stability of the whole PCB and bus bar model is stronger due to an embedded mode, and the design difficulty is reduced. According to the method, a user is helped to fully consider the effectiveness of the embedded bridging bus bar, the optimal layout and design scheme is selected in time, the market competitiveness of an electronic product is improved, the iteration period of the product is shortened, and the labor cost and the time cost are greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of computer simulation technology, and in particular to a simulation method for adding embedded jumper busbars. Background Technology

[0002] With the development of technology, electronic devices are gradually becoming smaller and lighter. At the same time, functionality and efficiency must be guaranteed. The design density of PCBs is getting higher and higher, and the design margin is getting smaller and smaller. For example, in a certain case, the two copper foils are far apart, but electrical connection is still required. Designers can only modify the original design to combine the two copper foils together or change the electrical connection relationship of the board. This leads to increased design limitations. Achieving electrical connection between PDNs and retaining the original design cannot be achieved at the same time.

[0003] The emergence of crossover busbars has solved the aforementioned problems. As a metallic geometric shape, the physical model of a busbar can be customized by the user. Busbars enable interconnection between two PDNs, solving this challenge without disrupting the original design. For example, Chinese patent CN107552909B discloses a busbar welding method. In the first welding zone, a busbar is welded to the head strip of the first battery string; in the second welding zone, a busbar is welded to the tail strip of the second battery string; and in the third welding zone, the tail strip of the first battery string and the head strip of the second battery string are welded onto the same busbar. In this invention, the first, second, and third welding zones operate automatically without individual operation, facilitating the welding of two battery strings. The entire process is automated, requiring no manual intervention and integrating with the conveyor line rhythm, significantly improving the level of automation.

[0004] The soldering method for bridging busbars can be either surface mount or embedded. Surface mount busbars are becoming increasingly widely used, but they occupy a large space and volume, and the stability of the entire structure cannot be guaranteed after the busbar is soldered onto the PCB. Therefore, embedded busbars are generally preferred.

[0005] Embedded jumper busbars can not only achieve electrical connection between two PDNs that are far apart on the PCB, but also have functions such as heat dissipation and auxiliary current carrying, helping users solve the problem of excessive PCB temperature rise. They can also maximize structural stability and save space. However, how to ensure the layout and optimal soldering scheme of embedded jumper busbars has become a problem for engineers to consider. Simulation before soldering is undoubtedly the most cost-effective and time-saving method. Through simulation, the model of embedded jumper busbar and PCB model can be combined. Based on the simulation results, the best choice and layout scheme of busbar can be determined under the influence of external factors such as different layouts, shapes, embedding depths and different current carrying capacity of PCB.

[0006] Currently, there is no simulation software that can simulate embedded jumper busbars as mentioned above. This paper proposes a method for integrated modeling and simulation of embedded jumper busbars and their corresponding PCB models in simulation software. This method effectively achieves a leap from zero to one, making board-level simulation of embedded jumper busbars no longer a pipe dream, but a practical realization. Summary of the Invention

[0007] The core of this invention lies in adding the model of an embedded jumper bus to a PCB model using simulation software and embedding it. Then, the network properties of the bus and its contact surface with the PCB are set to connect two different networks, achieving the jumper operation. Next, relevant simulation parameters are set, and finally, the simulation results are viewed to analyze the functionality of the embedded jumper bus and select the optimal layout. This solves the current problem of lacking simulation software that can concretely model embedded jumper buses and perform power integrity analysis, supporting the addition of embedded buses to the PCB for simulation analysis.

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A simulation method for adding an embedded bridging bus bar includes the following steps: Step 1: Import the initial design case into the simulation software. The design case includes the PCB design file. Step 2: Set other simulation parameters; Step 3: Import the user-customized jumper bus model, select embedded connection method between the model and PCB, then set the material properties and location of the model, and determine the soldering points of the jumper bus. Step 4: After the settings are completed, the simulation software will automatically identify the contact surface between the jumper bus model and the PCB. When the contact surface is a series of different power distribution networks, the software will merge them into the same group of circuit connections, thereby realizing the function of connecting different power networks on the PCB through the jumper bus. Step 5: After completing the settings, start the simulation and finally check the simulation results.

[0010] Furthermore, the location setting method in step three includes: the user freely drags the bridging bus bar model on the PCB to determine its soldering point.

[0011] Furthermore, in step three, the embedded method is used to fix the jumper busbar on the PCB. The embedded operation method is as follows: insert the pins of the jumper busbar into the through holes of the PCB. Furthermore, the verification method for the location of the bridging bus bar model in step three includes: verifying the center coordinates of the pre-reserved embedded via on the PCB and the center coordinates of the corresponding inserted pins of the bridging bus bar model, and checking whether they meet any of the following conditions: the coordinates coincide or the coordinate difference is within the allowable range. When any condition is met, the model position is confirmed to be correct.

[0012] Furthermore, the specific method for automatically identifying the contact surface between the bridging busbar model and the PCB in step four includes: extracting the geometric models of the PCB and the bridging busbar model, detecting their coincidence position on the Z-axis in the coordinate system, extracting all contact points, and then determining the contact surface.

[0013] Furthermore, the specific operation of merging the same group of circuit connections in step four is as follows: When the software extracts the PCB geometric model, the database file will identify the power distribution network where each model geometric point is located. When the same power distribution network identifier is identified, the geometric points with the same power network representation will be merged into the same data combination, thereby realizing the function of connecting different power networks on the PCB by bridging the bus bar.

[0014] Furthermore, other simulation parameters in step two include, but are not limited to, constructing the electrical circuit and setting its parameters, and selecting the thermal simulation model and setting its parameters.

[0015] Compared with the prior art, the advantages of this invention are: This solution represents a significant leap from zero to one in enabling simulation by adding embedded jumper busbars to PCBs. It is simple to operate, highly applicable, and widely applicable. It automatically processes the embedding depth of the busbar, automatically identifies the model location of the jumper busbar, and electrically connects the power networks at its contact surfaces. This achieves integrated modeling and simulation of the busbar and PCB, solving the problem of users being unable to electrically connect two different power networks due to insufficient design margin. Furthermore, the embedded design enhances the stability of the entire PCB and jumper busbar model, helping users fully consider the utility of embedded jumper busbars and promptly select the optimal layout and design scheme. This improves the market competitiveness of their electronic products, shortens product iteration cycles, and significantly reduces labor and time costs. Attached Figure Description

[0016] Figure 1 This is a flowchart of the present invention; Figure 2 This is a schematic diagram illustrating the parameter settings of the embedded busbar of the present invention; Figure 3 This is a schematic diagram of the voltage drop simulation results of the present invention; Figure 4 This is a simulation diagram of the busbar embedding position according to the present invention; Figure 5 This is a 3D schematic diagram of the busbar embedded in the present invention and integrated with the PCB. Figure 6 This is a simulation diagram showing the different contact surfaces of the busbar and PCB of the present invention belonging to different power networks. Figure 7 This is a cloud map showing the 3D temperature simulation results of the present invention; Figure 8 This is a 3D voltage drop distribution cloud map of the present invention. Detailed Implementation

[0017] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0018] First implementation method: Please see Figures 1 to 8 A simulation method for adding embedded jumper busbars includes the following steps: Step 1: Import the initial design case into the simulation software. The design case includes PCB design files, which are files that describe all components on the PCB, including but not limited to PDN, traces, vias, layer stack-up information, components, etc. This invention takes the PCB board as an example. Step 2: Set other simulation parameters, such as constructing the electrical circuit and setting its parameters, selecting the thermal simulation model and setting its parameters, etc. Since other simulation parameters are not the key content to be described in this invention, they will not be described in detail. You can refer to the conventional PCB simulation process. Step 3: Import the user-customized jumper bus model, select embedded connection method between the model and PCB, then set the material properties and location of the model, and determine the soldering points of the jumper bus. Embedded refers to the way the jumper bus is fixed on the PCB, where the pins of the jumper bus are inserted into the through holes of the PCB. There is also a surface mount type, which is not related to the implementation of this invention and will not be described in detail. The software defines its mode through different settings. Selecting SMT means surface mount, and selecting plug means embedded. The location setting methods include: the user can freely drag the jumper bus model on the PCB to determine its soldering point; by verifying the center coordinates of the pre-reserved through-hole on the PCB and the center coordinates of the corresponding inserted pin of the jumper bus model, it is checked whether they meet any of the following conditions: the coordinates coincide or the coordinate difference is within the allowable range. When any condition is met, the model position is confirmed to be correct.

[0019] Step 4: After the settings are completed, the simulation software will automatically identify the contact surface between the jumper bus model and the PCB. When the contact surface is a series of different power distribution networks, the software will merge them into the same group of circuit connections, thereby realizing the function of connecting different power networks on the PCB through the jumper bus. The specific method for automatically identifying the contact surface between the bridging busbar model and the PCB includes: extracting the geometric models of the PCB and the bridging busbar model, detecting their coincidence position on the Z-axis in the coordinate system, extracting all contact points, and then determining the contact surface; The specific operation of merging the same group of circuit connections is as follows: When the software extracts the PCB geometric model, the database file will identify the power distribution network where each model geometric point is located. When the same power distribution network identifier is identified, the geometric points with the same power network representation will be merged into the same data group, thereby realizing the function of connecting different power networks on the PCB through the bridging bus. The reason for connecting two different networks is that the PCB routing space is limited, and the two networks that need to be electrically connected cannot be laid out as directly connected. Therefore, it is necessary to use the bus to act as a conductor to connect the two different power distribution networks to meet the design requirements.

[0020] Step 5: After completing the settings, start the simulation and finally check the simulation results.

[0021] For details, please refer to: Figure 2 In step three, specify the 3D model of the jumper bus and set its connection method with the PCB to plug-in. Determine the position coordinates of the jumper bus model embedding position as (97.074, 89.471). These coordinates are fixed points in the physical structure and are determined by the designer in the early stage of the design. The coordinates in the simulation model are fixed values. Specify the material property of the jumper bus model as copper. The position of the jumper bus model embedding position can be achieved by dragging the model on the 2D plane or by directly filling in the coordinates.

[0022] Simulation results are as follows Figure 3 The simulation results, including the parameters set before simulation and the DC voltage drop, are shown. (Focus on the voltage drop and check if the value is within an acceptable range, generally within 3-5%, depending on the design requirements. This case aims to illustrate the method flow and does not elaborate on the specific analysis and processing of the simulation results. V, A, and mA are the data units.) The main purpose is to demonstrate the feasibility and creativity of this method, and to successfully complete the integrated modeling and simulation of the PCB and jumper busbar models. Since the focus of this invention is on how to construct an equivalent model rather than result analysis, and this method is applicable to all cases of this type, and the design requirements of each case are different, the analysis of a single result does not have universal significance. Because the design requirements of each case are different, the analysis of the results is not described in detail.

[0023] This method represents a leap from zero to one in implementing simulation by adding embedded jumper busbars to PCBs. It is simple to operate, highly applicable, and widely applicable. It automatically processes the embedding depth of the busbar, automatically identifies the model location of the jumper busbar, and electrically connects the power networks at its contact surfaces. This achieves integrated modeling and simulation of the busbar and PCB, solving the problem of users being unable to electrically connect two different power networks due to insufficient design margin. Furthermore, the embedded design enhances the stability of the entire PCB and jumper busbar model, helping users fully consider the utility of embedded jumper busbars and promptly select the optimal layout and design scheme. This improves the market competitiveness of their electronic products, shortens product iteration cycles, and significantly reduces labor and time costs.

[0024] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A simulation method for adding embedded bridging busbars, characterized in that: Includes the following steps: Step 1: Import the initial design case into the simulation software. The design case includes PCB design files. Step 2: Set other simulation parameters; Step 3: Import the user-customized jumper bus model, select embedded connection method between the model and PCB, then set the material properties and location of the model, and determine the soldering points of the jumper bus. Step 4: After the settings are completed, the simulation software will automatically identify the contact surface between the jumper bus model and the PCB. When the contact surface is a series of different power distribution networks, the software will merge them into the same group of circuit connections, thereby realizing the function of connecting different power networks on the PCB through the jumper bus. Step 5: After completing the settings, start the simulation and finally check the simulation results.

2. The simulation method for adding an embedded bridging bus bar according to claim 1, characterized in that: The location setting method described in step three includes: the user freely drags the bridging bus bar model on the PCB to determine its soldering point.

3. The simulation method for adding an embedded bridging bus bar according to claim 1, characterized in that: The embedded method mentioned in step three refers to the fixing method of the jumper bus on the PCB. The standard operation of the embedded method is to insert the pins of the jumper bus into the through holes of the PCB.

4. The simulation method for adding an embedded bridging bus bar according to claim 1, characterized in that: The verification method for the location of the jumper bus model in step three includes: verifying the center coordinates of the pre-reserved through-hole on the PCB and the center coordinates of the corresponding inserted pin of the jumper bus model, and checking whether they meet any of the following conditions: the coordinates coincide or the coordinate difference is within the allowable range. When any condition is met, it is confirmed that the location of the jumper bus model is correct.

5. The simulation method for adding an embedded bridging bus bar according to claim 1, characterized in that: The specific method for automatically identifying the contact surface between the bridging busbar model and the PCB in step four includes: extracting the geometric models of the PCB and the bridging busbar model, detecting their coincidence position on the Z-axis in the coordinate system, extracting all contact points, and then determining the contact surface.

6. The simulation method for adding an embedded bridging bus bar according to claim 1, characterized in that: The specific operation of merging the same group of circuit connections in step four is as follows: When the software extracts the PCB geometric model, the database file will identify the power distribution network where each model geometric point is located. When the same power distribution network identifier is identified, the geometric points with the same power network representation will be merged into the same data combination, thereby realizing the function of connecting different power networks on the PCB by bridging the bus bar.

7. The simulation method for adding an embedded bridging bus bar according to claim 1, characterized in that: Other simulation parameters mentioned in step two include, but are not limited to: constructing the electrical circuit and setting its parameters, and selecting the thermal simulation model and setting its parameters.

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