CN111428335A - Joint simulation method and device for battery module - Google Patents
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Abstract
本发明提供了一种电池模组的联合仿真方法及装置,该方法包括以下步骤:通过Amesim软件获取电池模组的参数,计算电芯的生热量;将生热量传输至Star ccm软件中;Star ccm软件根据生热量进行散热计算,并将散热计算得到的电芯温度传输至Amesim软件;Amesim软件接收电芯温度,并结合电池模组的参数重新计算生热量,得到新的生热量,并将新的生热量传输至Star ccm软件进行散热计算。本发明能够实现电池模组的联合仿真,即利用Amesim进行生热计算,利用star ccm进行散热分析,采用两个软件各自的优点,规避了单一软件进行仿真时精度差的问题,从而提高电池模组的仿真精度。
The invention provides a co-simulation method and device for a battery module. The method includes the following steps: obtaining parameters of the battery module through Amesim software, and calculating the heat generation of the battery cell; transferring the heat generation to the Star ccm software; The ccm software performs heat dissipation calculation according to the heat generation, and transmits the cell temperature obtained by the heat dissipation calculation to the Amesim software; the Amesim software receives the cell temperature, and recalculates the heat generation according to the parameters of the battery module to obtain the new heat generation, and calculates the heat generation. The new heat generation is transferred to the Star ccm software for heat dissipation calculations. The invention can realize the co-simulation of the battery module, that is, use Amesim for heat generation calculation, use star ccm for heat dissipation analysis, and use the respective advantages of the two software to avoid the problem of poor accuracy when a single software is used for simulation, thereby improving the battery model. The simulation accuracy of the group.
Description
技术领域technical field
本发明涉及仿真技术领域,特别涉及一种电池模组的联合仿真方法及装置。The invention relates to the technical field of simulation, in particular to a method and device for co-simulation of a battery module.
背景技术Background technique
电池包作为电动车的核心部件,需要满足整车使用条件下性能、安全及使用寿命等相关标准。而适宜的温度是保证电芯使用寿命的关键,需要确保不论在高温环境40℃,还是低温环境-30℃,电芯都能够尽量维持在0~45℃进行工作,为此需要对电池进行热管理,即在高温工况下对电池包进行冷却,在低温工况下进行加热。在电池包热管理工作中经常需要应用仿真工具进行前期热方案评估,方案验证以及优化,以缩短开发周期减少试验费用。As the core component of an electric vehicle, the battery pack needs to meet relevant standards such as performance, safety and service life under the conditions of the vehicle. Appropriate temperature is the key to ensure the service life of the battery cell. It is necessary to ensure that the battery cell can be maintained at 0 to 45 °C as much as possible whether in a high temperature environment of 40 °C or a low temperature environment of -30 °C. Management, that is, cooling the battery pack under high temperature conditions and heating under low temperature conditions. In the thermal management of battery packs, it is often necessary to apply simulation tools for preliminary thermal scheme evaluation, scheme verification and optimization, so as to shorten the development cycle and reduce the test cost.
在电池包热仿真过程中,生热量的计算对仿真的精度至关重要,Star CCM作为热仿真通用软件在电池包热管理仿真中应用广泛,主要用于三维热仿真工作。通过三维仿真可以得到电池包内不同位置电芯的温度、温差、冷却系统的流阻,同时也可以进行方案优化设计。电芯的生热量计算方法为Q=I2*R,其中Q为电芯生热量,I为工况电流,R为电芯在工况下的平均内阻。然而,在应用Star ccm进行电池包热管理工况仿真及方案优化时,计算发热功率时直流内阻R采用的是工况下的平均值,在高温情况时由于不同温度和soc下内阻变化较小,计算的发热量偏差不大,但在考虑低温工况放电时内阻随温度变化的差异特别大,导致生热量误差会非常大,从而影响仿真精度。In the process of battery pack thermal simulation, the calculation of heat generation is very important to the simulation accuracy. Star CCM, as a general thermal simulation software, is widely used in battery pack thermal management simulation, mainly for 3D thermal simulation work. Through 3D simulation, the temperature, temperature difference, and flow resistance of the cooling system of the cells at different positions in the battery pack can be obtained, and the program optimization design can also be carried out. The calculation method of the heat generation of the cell is Q=I 2 *R, where Q is the heat generation of the cell, I is the current under the working condition, and R is the average internal resistance of the cell under the working condition. However, when applying Star ccm to simulate the thermal management conditions of the battery pack and optimize the solution, the DC internal resistance R is the average value under the operating conditions when calculating the heating power. If the value is small, the deviation of the calculated calorific value is not large, but the difference between the internal resistance and the temperature change is particularly large when considering the discharge under low temperature conditions, resulting in a very large error in the calorific value, thus affecting the simulation accuracy.
Amesim是一款高效快捷的一维仿真软件,其中包含热仿真模块。通过一维仿真可以快速得到电池包内不同位置电芯温度、温差。电芯的生热量计算方法为Q=I2*R,其中Q为电芯生热量,I为工况电流,R为基于不同温度不同soc不同放电倍率的内阻。然而,在应用Amesim进行电池包热管理工况仿真时,计算发热功率的直流内阻更加精准,但一维仿真不能够反应电池包内所有点的温度分布,同时计算散热量时只考虑单一方向,导致散热量计算不够精确,从而影响仿真精度。Amesim is an efficient and fast 1D simulation software that includes a thermal simulation module. Through one-dimensional simulation, the temperature and temperature difference of cells at different positions in the battery pack can be quickly obtained. The calculation method of the heat generation of the cell is Q=I 2 *R, where Q is the heat generation of the cell, I is the working current, and R is the internal resistance based on different temperatures and different soc and different discharge rates. However, when using Amesim to simulate the thermal management conditions of the battery pack, the DC internal resistance of the heating power is more accurate, but the one-dimensional simulation cannot reflect the temperature distribution of all points in the battery pack, and only a single direction is considered when calculating the heat dissipation. , resulting in inaccurate calculation of heat dissipation, thus affecting the simulation accuracy.
发明内容SUMMARY OF THE INVENTION
有鉴于此,本发明旨在提出一种电池模组的联合仿真方法,该方法能够实现电池模组的联合仿真,即利用Amesim进行生热计算,利用star ccm进行散热分析,采用两个软件各自的优点,规避了单一软件进行仿真时精度差的问题,从而提高电池模组的仿真精度。In view of this, the present invention aims to propose a co-simulation method for battery modules, which can realize co-simulation of battery modules, that is, use Amesim for heat generation calculation, use star ccm for heat dissipation analysis, and use two software respectively. The advantage of , avoids the problem of poor accuracy when a single software performs simulation, thereby improving the simulation accuracy of the battery module.
为达到上述目的,本发明的技术方案是这样实现的:In order to achieve the above object, the technical scheme of the present invention is achieved in this way:
一种电池模组的联合仿真方法,包括以下步骤:通过Amesim软件获取电池模组的参数,计算电芯的生热量;将所述生热量传输至Star ccm软件中;所述Star ccm软件根据所述生热量进行散热计算;并将散热计算得到的电芯温度传输至所述Amesim软件;所述Amesim软件接收所述电芯温度,并结合所述电池模组的参数重新计算生热量,得到新的生热量,并将所述新的生热量传输至所述Star ccm软件进行散热计算。A co-simulation method for a battery module, comprising the following steps: obtaining parameters of the battery module through Amesim software, and calculating the heat generation of a battery cell; transferring the heat generation to Star ccm software; The heat generation is calculated by heat dissipation; the cell temperature obtained by the heat dissipation calculation is transmitted to the Amesim software; the Amesim software receives the cell temperature, and recalculates the heat generation in combination with the parameters of the battery module to obtain a new heat generation, and transfer the new heat generation to the Star ccm software for heat dissipation calculation.
进一步地,所述Star ccm软件周期性将散热计算得到的电芯温度传输至所述Amesim软件。Further, the Star ccm software periodically transmits the cell temperature obtained by the heat dissipation calculation to the Amesim software.
进一步地,所述Amesim软件与Star ccm软件迭代进行数据交互,直至达到预设的工况截止时间。Further, the Amesim software and the Star ccm software iteratively perform data interaction until the preset working condition deadline is reached.
进一步地,通过Amesim软件获取电池模组的参数,计算电芯的生热量,具体包括:在所述Amesim软件中调用预存的电芯生热量计算模型,向所述电芯生热量计算模型输入获取的电池模组的参数,计算所述电芯的生热量,其中,所述电池模组的参数至少包括:电芯温度、SOC、电池放电倍率中的一个或多个。Further, obtaining the parameters of the battery module through the Amesim software, and calculating the heat generation of the battery cells, specifically includes: calling a pre-stored battery heat generation calculation model in the Amesim software, and inputting the obtained battery heat generation calculation model to the battery cell. The parameters of the battery module are calculated, and the heat generation of the battery cell is calculated, wherein the parameters of the battery module at least include: one or more of the battery core temperature, SOC, and battery discharge rate.
相对于现有技术,本发明所述的电池模组的联合仿真方法具有以下优势:Compared with the prior art, the co-simulation method of the battery module of the present invention has the following advantages:
本发明所述的电池模组的联合仿真方法,通过Amesim软件和Star ccm软件实现电池模组的联合仿真,即利用Amesim进行生热计算,利用star ccm进行散热分析,采用两个软件各自的优点,规避了单一软件进行仿真时精度差的问题,从而提高电池模组的仿真精度。The co-simulation method of the battery module of the present invention realizes the co-simulation of the battery module through Amesim software and Star ccm software, that is, Amesim is used for heat generation calculation, star ccm is used for heat dissipation analysis, and the respective advantages of the two softwares are used. , which avoids the problem of poor accuracy during simulation with a single software, thereby improving the simulation accuracy of the battery module.
本发明的另一个目的在于提出一种电池模组的联合仿真装置,该装置能够实现电池模组的联合仿真,即利用Amesim进行生热计算,利用star ccm进行散热分析,采用两个软件各自的优点,规避了单一软件进行仿真时精度差的问题,从而提高电池模组的仿真精度。Another object of the present invention is to provide a co-simulation device for battery modules, which can realize co-simulation of battery modules, that is, use Amesim to perform heat generation calculation, use star ccm to perform heat dissipation analysis, and use the respective software of the two software. The advantage is to avoid the problem of poor accuracy when a single software performs simulation, thereby improving the simulation accuracy of the battery module.
为达到上述目的,本发明的技术方案是这样实现的:In order to achieve the above object, the technical scheme of the present invention is achieved in this way:
一种电池模组的联合仿真装置,包括:处理模块,所述处理模块装载有Amesim软件和Star ccm软件,所述处理模块用于:通过Amesim软件获取电池模组的参数,计算电芯的生热量,并将所述生热量传输至Star ccm软件中,以便所述Star ccm软件根据所述生热量进行散热计算,并将散热计算得到的电芯温度传输至所述Amesim软件,以便所述Amesim软件接收所述电芯温度,并结合所述电池模组的参数重新计算生热量,得到新的生热量,并将所述新的生热量传输至所述Star ccm软件进行散热计算。A co-simulation device for a battery module, comprising: a processing module loaded with Amesim software and Star ccm software, and the processing module is used for: acquiring parameters of the battery module through the Amesim software, calculating the life of a battery cell. heat, and transmit the heat generation to the Star ccm software, so that the Star ccm software can calculate the heat dissipation according to the heat generation, and transmit the cell temperature obtained by the heat dissipation calculation to the Amesim software, so that the Amesim The software receives the cell temperature, and recalculates the heat generation in combination with the parameters of the battery module to obtain a new heat generation, and transmits the new heat generation to the Star ccm software for heat dissipation calculation.
进一步地,所述处理模块用于:通过所述Star ccm软件周期性将散热计算得到的电芯温度传输至所述Amesim软件。Further, the processing module is configured to: periodically transmit the cell temperature obtained by the heat dissipation calculation to the Amesim software through the Star ccm software.
进一步地,所述Amesim软件与Star ccm软件迭代进行数据交互,直至达到预设的工况截止时间。Further, the Amesim software and the Star ccm software iteratively perform data interaction until the preset working condition deadline is reached.
进一步地,所述处理模块通过Amesim软件获取电池模组的参数,计算电芯的生热量,具体包括:在所述Amesim软件中调用预存的电芯生热量计算模型,向所述电芯生热量计算模型输入获取的电池模组的参数,计算所述电芯的生热量,其中,所述电池模组的参数至少包括:电芯温度、SOC、电池放电倍率中的一个或多个。Further, the processing module obtains the parameters of the battery module through Amesim software, and calculates the heat generation of the battery cells, which specifically includes: calling a pre-stored battery heat generation calculation model in the Amesim software to generate heat to the battery cells. The calculation model inputs the acquired parameters of the battery module, and calculates the heat generation of the battery cells, wherein the parameters of the battery module at least include one or more of: battery core temperature, SOC, and battery discharge rate.
所述的电池模组的联合仿真装置与上述的电池模组的联合仿真方法相对于现有技术所具有的优势相同,在此不再赘述。The co-simulation device for a battery module and the above-mentioned co-simulation method for a battery module have the same advantages over the prior art, which will not be repeated here.
附图说明Description of drawings
构成本发明的一部分的附图用来提供对本发明的进一步理解,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:
图1为本发明实施例所述的电池模组的联合仿真方法的流程图;1 is a flowchart of a co-simulation method for a battery module according to an embodiment of the present invention;
图2为本发明实施例所述的电池模组的联合仿真装置的结构框图。FIG. 2 is a structural block diagram of a co-simulation device for a battery module according to an embodiment of the present invention.
附图标记说明:Description of reference numbers:
电池模组的联合仿真装置100和处理模块110。The co-simulation device 100 and the processing module 110 of the battery module.
具体实施方式Detailed ways
需要说明的是,在不冲突的情况下,本发明中的实施例及实施例中的特征可以相互组合。It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.
下面将参考附图并结合实施例来详细说明本发明。The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
图1是根据本发明一个实施例的电池模组的联合仿真方法的流程图。如图1所示,根据本发明一个实施例的电池模组的联合仿真方法,包括以下步骤:FIG. 1 is a flowchart of a co-simulation method for a battery module according to an embodiment of the present invention. As shown in FIG. 1, a co-simulation method for a battery module according to an embodiment of the present invention includes the following steps:
步骤S1:通过Amesim软件获取电池模组的参数,计算电芯的生热量。Step S1: Obtain the parameters of the battery module through Amesim software, and calculate the heat generation of the battery cells.
具体的,通过Amesim软件获取电池模组的参数,计算电芯的生热量,具体包括:在Amesim软件中调用预存的电芯生热量计算模型,向电芯生热量计算模型输入获取的电池模组的参数,计算电芯的生热量,其中,电池模组的参数至少包括:电芯温度、SOC、电池放电倍率中的一个或多个。Specifically, the parameters of the battery module are obtained through the Amesim software, and the heat generation of the battery cells is calculated, which specifically includes: calling a pre-stored battery heat generation calculation model in the Amesim software, and inputting the obtained battery module into the battery heat generation calculation model. Calculate the heat generation of the battery cell, wherein the parameters of the battery module include at least one or more of the battery core temperature, SOC, and battery discharge rate.
换言之,即Amesim软件中预存有电芯生热量计算模型,在计算电芯的生热量时,将获取到的电池模组的参数,如电芯温度、SOC、电池放电倍率中的一个或多个,根据这些参数计算不同温度、不同SOC下对应的电芯直流内阻,在结合获取到的工况电流,从而可计算得到电芯的生热量。In other words, Amesim software pre-stores a cell heat generation calculation model. When calculating the cell heat generation, the parameters of the battery module, such as cell temperature, SOC, and battery discharge rate, will be obtained. One or more , according to these parameters to calculate the corresponding DC internal resistance of the battery cells at different temperatures and different SOCs, and combine the obtained operating currents, so that the heat generation of the battery cells can be calculated.
步骤S2:将生热量传输至Star ccm软件中。具体的,可将Star ccm与Amesim进行连接,以确保Amesim计算的电芯的生热量能够传递到Star ccm中,即确保数据稳定可靠地传输。Step S2: Transfer the heat generation to the Star ccm software. Specifically, the Star ccm can be connected to Amesim to ensure that the heat generated by the cells calculated by Amesim can be transferred to the Star ccm, that is, to ensure stable and reliable data transmission.
步骤S3:Star ccm软件根据生热量进行散热计算,并将散热计算得到的电芯温度传输至所述Amesim软件。Step S3: The Star ccm software performs heat dissipation calculation according to the heat generation, and transmits the cell temperature obtained by the heat dissipation calculation to the Amesim software.
步骤S4:Amesim软件接收电芯温度,并结合电池模组的参数重新计算生热量,得到新的生热量,并将新的生热量传输至Star ccm软件进行散热计算。Step S4: the Amesim software receives the cell temperature, and recalculates the heat generation in combination with the parameters of the battery module to obtain a new heat generation, and transmits the new heat generation to the Star ccm software for heat dissipation calculation.
即,Star ccm软件根据接收到的电芯的生热量进行电芯散热分析,输出电芯温度。Star ccm软件将散热计算得到的电芯温度反馈至Amesim软件,以便Amesim重新计算生热量,得到新的生热量,并将新的生热量传输至Star ccm软件重新进行散热计算,从而形成迭代过程,提高了仿真精度。That is, the Star ccm software analyzes the heat dissipation of the cell according to the received heat generation of the cell, and outputs the cell temperature. The Star ccm software feeds back the cell temperature obtained by the heat dissipation calculation to the Amesim software, so that Amesim recalculates the heat generation, obtains the new heat generation, and transmits the new heat generation to the Star ccm software to re-calculate the heat dissipation, thus forming an iterative process. Improved simulation accuracy.
其中,Star ccm软件周期性将散热计算得到的电芯温度传输至Amesim软件。也即,Star ccm软件定时将散热计算得到的电芯温度反馈至Amesim软件。在具体实施例中,例如Star ccm在进行散热计算时,每计算1秒将电芯温度反馈给Amesim,从而数据的及时更新,利于提高仿真精度。Among them, the Star ccm software periodically transmits the cell temperature obtained by the heat dissipation calculation to the Amesim software. That is, the Star ccm software regularly feeds back the cell temperature obtained by the heat dissipation calculation to the Amesim software. In a specific embodiment, for example, when Star ccm performs heat dissipation calculation, the cell temperature is fed back to Amesim every 1 second, so that the data can be updated in time, which is beneficial to improve the simulation accuracy.
具体的,Amesim软件与Star ccm软件迭代进行数据交互,直至达到预设的工况截止时间。也即是说,上述Amesim软件与Star ccm软件之间进行数据传输的过程是迭代执行的,直至运行时间达到预设的工况截止时间时才结束。Specifically, Amesim software interacts with Star ccm software iteratively until the preset working condition deadline is reached. That is to say, the above-mentioned process of data transmission between Amesim software and Star ccm software is performed iteratively and does not end until the running time reaches the preset working condition deadline.
在具体实施例中,举例而言,即在Amesim中调用电芯生热量计算模型,根据电池模组的参数,计算电芯的生热量;将Star ccm与Amesim进行连接,确保Amesim计算的电芯生热量能够传递到Star ccm中;运行Star ccm进行散热计算分析,每计算1秒将电芯的温度反馈给Amesim,Amesim根据温度在重新计算电芯生热量,并再次反馈给Star ccm,直至运行到工况截止时间。In a specific embodiment, for example, calling the cell heat generation calculation model in Amesim, and calculating the heat generation of the cell according to the parameters of the battery module; The heat generation can be transferred to the Star ccm; run the Star ccm for heat dissipation calculation and analysis, and feed back the temperature of the cell to Amesim every 1 second. to the working condition deadline.
综上,该电池模组的联合仿真方法的实现流程概述为:应用Amesim进行生热量计算,将生热量赋予到Star ccm中进行散热计算,将计算的电芯温度反馈给Amesim,Amesim基于反馈的电芯温度、soc、放电倍率等参数的变化计算新的生热量后重新赋给Star ccm进行散热计算,迭代执行该过程直至达到设定的截止时间,如此进行联合仿真,确保电芯生热量和散热量都是准确的,从而提高仿真精度。To sum up, the implementation process of the co-simulation method of the battery module is outlined as follows: use Amesim to calculate the heat generation, assign the heat generation to the Star ccm for heat dissipation calculation, and feed back the calculated cell temperature to Amesim. Changes in parameters such as cell temperature, soc, discharge rate and other parameters calculate the new heat generation, and then assign it to Star ccm for heat dissipation calculation, and execute the process iteratively until the set deadline is reached. The heat dissipation is accurate, which improves simulation accuracy.
根据具体实验数据表明,单独使用Star cmm进行三维仿真时,三维仿真结果与实测结果最大温差为3℃,而采用本发明实施例联合仿真方法进行联合仿真时,联合仿真结果与实测最大温差为1℃,从而,本发明实施例能够有效提高仿真精度。According to the specific experimental data, when Star cmm is used alone for 3D simulation, the maximum temperature difference between the 3D simulation results and the measured results is 3°C, while when the co-simulation method according to the embodiment of the present invention is used for co-simulation, the maximum temperature difference between the co-simulation results and the actual measurement is 1°C ℃, thus, the embodiment of the present invention can effectively improve the simulation accuracy.
根据本发明实施例的电池模组的联合仿真方法,通过Amesim软件和Star ccm软件实现电池模组的联合仿真,即利用Amesim进行生热计算,利用star ccm进行散热分析,采用两个软件各自的优点,规避了单一软件进行仿真时精度差的问题,从而提高电池模组的仿真精度。According to the co-simulation method of the battery module of the embodiment of the present invention, the co-simulation of the battery module is realized by the Amesim software and the Star ccm software, that is, the heat generation calculation is performed by using Amesim, and the heat dissipation analysis is performed by using the star ccm. The advantage is to avoid the problem of poor accuracy when a single software performs simulation, thereby improving the simulation accuracy of the battery module.
本发明的进一步实施例提出了一种电池模组的联合仿真装置。A further embodiment of the present invention provides a co-simulation device for a battery module.
图2是根据本发明一个实施例的电池模组的联合仿真装置的结构框图。如图2所示,根据本发明一个实施例的电池模组的联合仿真装置100,包括启处理模块110。FIG. 2 is a structural block diagram of a co-simulation device for a battery module according to an embodiment of the present invention. As shown in FIG. 2 , the co-simulation apparatus 100 of a battery module according to an embodiment of the present invention includes an activation processing module 110 .
具体的,处理模块110装载有Amesim软件和Star ccm软件,处理模块110用于:通过Amesim软件获取电池模组的参数,计算电芯的生热量,并将生热量传输至Star ccm软件中,以便Star ccm软件根据生热量进行散热计算,并将散热计算得到的电芯温度传输至Amesim软件,以便Amesim软件接收电芯温度,并结合电池模组的参数重新计算生热量,得到新的生热量,并将新的生热量传输至Star ccm软件进行散热计算。例如,可将Star ccm与Amesim进行连接,以确保Amesim计算的电芯的生热量能够传递到Star ccm中,即确保数据稳定可靠地传输。Star ccm软件根据接收到的电芯的生热量进行电芯散热分析,输出电芯温度。Specifically, the processing module 110 is loaded with Amesim software and Star ccm software, and the processing module 110 is used to: obtain the parameters of the battery module through the Amesim software, calculate the heat generation of the battery cells, and transmit the heat generation to the Star ccm software, so that The Star ccm software performs heat dissipation calculation based on the heat generation, and transmits the cell temperature obtained by the heat dissipation calculation to the Amesim software, so that the Amesim software can receive the cell temperature and recalculate the heat generation according to the parameters of the battery module to obtain new heat generation. And transfer the new heat generation to Star ccm software for heat dissipation calculation. For example, Star ccm can be connected with Amesim to ensure that the heat generated by the cells calculated by Amesim can be transferred to Star ccm, that is, to ensure stable and reliable data transmission. The Star ccm software analyzes the heat dissipation of the cell according to the received heat generation of the cell, and outputs the cell temperature.
具体的,处理模块110通过Amesim软件获取电池模组的参数,计算电芯的生热量,具体包括:在Amesim软件中调用预存的电芯生热量计算模型,向电芯生热量计算模型输入获取的电池模组的参数,计算电芯的生热量,其中,电池模组的参数至少包括:电芯温度、SOC、电池放电倍率中的一个或多个。Specifically, the processing module 110 obtains the parameters of the battery module through the Amesim software, and calculates the heat generation of the battery cells, which specifically includes: calling a pre-stored battery heat generation calculation model in the Amesim software, and inputting the obtained heat generation calculation model into the battery cell heat generation calculation model. The parameters of the battery module are used to calculate the heat generation of the battery cells, wherein the parameters of the battery module include at least one or more of the battery core temperature, SOC, and battery discharge rate.
换言之,即Amesim软件中预存有电芯生热量计算模型,在计算电芯的生热量时,将获取到的电池模组的参数,如电芯温度、SOC、电池放电倍率中的一个或多个,根据这些参数计算不同温度、不同SOC下对应的电芯直流内阻,在结合获取到的工况电流,从而可计算得到电芯的生热量。In other words, Amesim software pre-stores a cell heat generation calculation model. When calculating the cell heat generation, the parameters of the battery module, such as cell temperature, SOC, and battery discharge rate, will be obtained. One or more , according to these parameters to calculate the corresponding DC internal resistance of the battery cells at different temperatures and different SOCs, and combine the obtained operating currents, so that the heat generation of the battery cells can be calculated.
Star ccm软件将散热计算得到的电芯温度反馈至Amesim软件,以便Amesim重新计算生热量,得到新的生热量,并将新的生热量传输至Star ccm软件重新进行散热计算,从而形成迭代过程,提高了仿真精度。The Star ccm software feeds back the cell temperature obtained by the heat dissipation calculation to the Amesim software, so that Amesim recalculates the heat generation, obtains the new heat generation, and transmits the new heat generation to the Star ccm software to re-calculate the heat dissipation, thus forming an iterative process. Improved simulation accuracy.
其中,处理模块110用于:通过Star ccm软件周期性将散热计算得到的电芯温度传输至Amesim软件。也即,Star ccm软件定时将散热计算得到的电芯温度反馈至Amesim软件。在具体实施例中,例如Star ccm在进行散热计算时,每计算1秒将电芯温度反馈给Amesim,从而数据的及时更新,利于提高仿真精度。The processing module 110 is configured to: periodically transmit the cell temperature obtained by the heat dissipation calculation to the Amesim software through the Star ccm software. That is, the Star ccm software regularly feeds back the cell temperature obtained by the heat dissipation calculation to the Amesim software. In a specific embodiment, for example, when Star ccm performs heat dissipation calculation, the cell temperature is fed back to Amesim every 1 second, so that the data can be updated in time, which is beneficial to improve the simulation accuracy.
具体的,Amesim软件与Star ccm软件迭代进行数据交互,直至达到预设的工况截止时间。也即是说,上述Amesim软件与Star ccm软件之间进行数据传输的过程是迭代执行的,直至运行时间达到预设的工况截止时间时才结束。Specifically, Amesim software interacts with Star ccm software iteratively until the preset working condition deadline is reached. That is to say, the above-mentioned process of data transmission between Amesim software and Star ccm software is performed iteratively and does not end until the running time reaches the preset working condition deadline.
在具体实施例中,举例而言,即在Amesim中调用电芯生热量计算模型,根据电池模组的参数,计算电芯的生热量;将Star ccm与Amesim进行连接,确保Amesim计算的电芯生热量能够传递到Star ccm中;运行Star ccm进行散热计算分析,每计算1秒将电芯的温度反馈给Amesim,Amesim根据温度在重新计算电芯生热量,并再次反馈给Star ccm,直至运行到工况截止时间。In a specific embodiment, for example, calling the cell heat generation calculation model in Amesim, and calculating the heat generation of the cell according to the parameters of the battery module; The heat generation can be transferred to the Star ccm; run the Star ccm for heat dissipation calculation and analysis, and feed back the temperature of the cell to Amesim every 1 second. to the working condition deadline.
综上,该电池模组的联合仿真装置的实现流程概述为:应用Amesim进行生热量计算,将生热量赋予到Star ccm中进行散热计算,将计算的电芯温度反馈给Amesim,Amesim基于反馈的电芯温度、soc、放电倍率等参数的变化计算新的生热量后重新赋给Star ccm进行散热计算,迭代执行该过程直至达到设定的截止时间,如此进行联合仿真,确保电芯生热量和散热量都是准确的,从而提高仿真精度。In summary, the implementation process of the co-simulation device of the battery module is outlined as follows: use Amesim to calculate the heat generation, assign the heat generation to the Star ccm for heat dissipation calculation, and feed back the calculated cell temperature to Amesim. Changes in parameters such as cell temperature, soc, discharge rate and other parameters calculate the new heat generation, and then assign it to Star ccm for heat dissipation calculation, and execute the process iteratively until the set deadline is reached. The heat dissipation is accurate, which improves simulation accuracy.
根据具体实验数据,单独使用Star cmm进行三维仿真时,三维仿真结果与实测结果最大温差为3℃,而采用本发明实施例联合仿真方法进行联合仿真时,联合仿真结果与实测最大温差为1℃,从而,本发明实施例能够有效提高仿真精度。According to the specific experimental data, when Star cmm is used alone for 3D simulation, the maximum temperature difference between the 3D simulation results and the measured results is 3°C, while when the co-simulation method according to the embodiment of the present invention is used for co-simulation, the maximum temperature difference between the co-simulation results and the actual measurement is 1°C , thus, the embodiment of the present invention can effectively improve the simulation accuracy.
需要说明的是,本发明实施例的电池模组的联合仿真装置的具体实现方式与本发明实施例的电池模组的联合仿真方法的具体实现方式类似,具体请参见方法部分的描述,为了减少冗余,此处不做赘述。It should be noted that the specific implementation of the co-simulation device for battery modules in the embodiment of the present invention is similar to the specific implementation of the co-simulation method for battery modules in the embodiment of the present invention. For details, please refer to the description in the method section. Redundancy is not repeated here.
根据本发明实施例的电池模组的联合仿真装置,通过Amesim软件和Star ccm软件实现电池模组的联合仿真,即利用Amesim进行生热计算,利用star ccm进行散热分析,采用两个软件各自的优点,规避了单一软件进行仿真时精度差的问题,从而提高电池模组的仿真精度。According to the co-simulation device of the battery module according to the embodiment of the present invention, the co-simulation of the battery module is realized by the Amesim software and the Star ccm software, that is, the heat generation calculation is performed by Amesim, and the heat dissipation analysis is performed by the star ccm. The advantage is to avoid the problem of poor accuracy when a single software performs simulation, thereby improving the simulation accuracy of the battery module.
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.
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