CN114388929A - A cooling system and method for automotive power battery module - Google Patents
A cooling system and method for automotive power battery moduleDownload PDFInfo
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Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及汽车动力电池模组散热领域，具体而言，涉及一种用于汽车动力电池模组的冷却系统、方法。The invention relates to the field of heat dissipation of automotive power battery modules, in particular to a cooling system and method for automotive power battery modules.
背景技术Background technique
电动汽车操控性强、节能减排，因而得到广泛关注并快速发展。但是电池包的体积笨重、能量密度低和容易出现热失控等问题成为了电动汽车发展的主要掣肘。锂离子电池最佳工作温度为20-40℃，在外界温度以及自身生热变化等因素的影响下，实际情况中，电池的工作温度往往会高于理想状态。在有关电池的各项研究之中，负责调节电池温度的电池热管理系统处在了一个非常特殊而重要的地位。冷却系统是电池安全稳定工作的保障，电池的冷却效果与电池安全密切相关。Electric vehicles have strong maneuverability, energy saving and emission reduction, so they have been widely concerned and developed rapidly. However, the bulky bulk, low energy density and easy thermal runaway of battery packs have become the main constraints for the development of electric vehicles. The optimal working temperature of lithium-ion batteries is 20-40 °C. Under the influence of factors such as external temperature and changes in its own heat generation, in actual situations, the working temperature of the battery is often higher than the ideal state. Among the various studies on batteries, the battery thermal management system, which is responsible for regulating the battery temperature, occupies a very special and important position. The cooling system is the guarantee for the safe and stable operation of the battery, and the cooling effect of the battery is closely related to the safety of the battery.
现有技术中，已有的冷却系统绝大部分采用液体冷却的方式。In the prior art, most of the existing cooling systems use liquid cooling.
现有技术中，虽然液冷系统具有很好的散热性能，但传统的控制策略采用固定冷却液目标温度来覆盖所有工况往往会造成电池的冷冲击，为了满足电池单体之间的一致性和电池单体之间小于5℃的行业普遍值，往往通过不断改进液冷板的管路布局与构造来控制冷却液的流向及分布来实现。然而，冷却流道的复杂化不仅会造成冷却液的压力损失，还会大大增加加工难度与成本。现有专利在电池散热方面集中研究冷却回路的改进，对冷却策略与方式上研究甚少。In the prior art, although the liquid cooling system has good heat dissipation performance, the traditional control strategy uses a fixed coolant target temperature to cover all working conditions, which often results in a cold shock of the battery. In order to meet the consistency between battery cells The industry general value of less than 5°C between the battery cell and the battery cell is often achieved by continuously improving the pipeline layout and structure of the liquid cooling plate to control the flow direction and distribution of the cooling liquid. However, the complexity of the cooling channel will not only cause the pressure loss of the coolant, but also greatly increase the processing difficulty and cost. Existing patents focus on improving the cooling circuit in terms of battery heat dissipation, but little research on cooling strategies and methods.
发明内容SUMMARY OF THE INVENTION
为解决上述问题，本发明的目的在于提出一种用于汽车动力电池模组的冷却系统、方法。本发明的目的是通过以下技术方案实现的。In order to solve the above problems, the purpose of the present invention is to provide a cooling system and method for an automotive power battery module. The object of the present invention is achieved through the following technical solutions.
第一方面本发明提供一种用于汽车动力电池模组的冷却系统，包括：电池模组、多个温度传感器，车载ECU，冷却液控制模块以及散热管道。In a first aspect, the present invention provides a cooling system for an automotive power battery module, including: a battery module, a plurality of temperature sensors, an on-board ECU, a coolant control module and a heat dissipation pipe.
散热管道包围电池模组，电池模组由若干个电池组成，在若干个电池中选取多个标定电池；多个标定电池与多个温度传感器一一对应连接。The heat dissipation pipe surrounds the battery module, the battery module is composed of several batteries, and a plurality of calibration batteries are selected from the plurality of batteries; the plurality of calibration batteries are connected with a plurality of temperature sensors in one-to-one correspondence.
每个温度传感器用于测量对应标定电池的实时温度。Each temperature sensor is used to measure the real-time temperature of the corresponding calibrated battery.
每个温度传感器与车载ECU连接，用于将对应标定电池的实时温度信息传输至车载ECU。Each temperature sensor is connected to the on-board ECU for transmitting the real-time temperature information of the corresponding calibrated battery to the on-board ECU.
车载ECU用于计算多个标定电池实时温度的多个温度差，确定多个温度差中的最大温度差；车载ECU用于根据最大温度差确定冷却液温度、维持时长可变的冷却方案后，控制冷却液控制模块执行确定后的冷却液温度、维持时长可变的冷却方案。The on-board ECU is used to calculate multiple temperature differences of the real-time temperatures of the calibrated batteries, and determine the maximum temperature difference among the multiple temperature differences; the on-board ECU is used to determine the coolant temperature according to the maximum temperature difference and maintain a cooling scheme with a variable duration. Controls the coolant control module to implement a cooling scheme with a determined coolant temperature and a variable duration.
冷却液控制模块用于控制冷却液输出至散热管道内；冷却液控制模块用于降低冷却液温度。The cooling liquid control module is used to control the output of the cooling liquid to the cooling pipe; the cooling liquid control module is used to reduce the cooling liquid temperature.
可选的，还包括：温差计算模块。Optionally, it also includes: a temperature difference calculation module.
每个温度传感器与温差计算模块连接，用于将每个标定电池的实时温度信息传输至温差计算模块。Each temperature sensor is connected with the temperature difference calculation module for transmitting the real-time temperature information of each calibrated battery to the temperature difference calculation module.
温差计算模块计算多个标定电池实时温度的多个温度差。The temperature difference calculation module calculates a plurality of temperature differences of the real-time temperatures of the calibration batteries.
温差计算模块与车载ECU连接，用于将多个温度差传输至车载ECU。The temperature difference calculation module is connected with the on-board ECU for transmitting multiple temperature differences to the on-board ECU.
可选的，冷却液温度、维持时长可变的冷却方案，包括：Optional cooling solutions with variable coolant temperature and duration, including:
若温度差小于3℃，冷却方案为冷却液以当前温度维持35-45秒，35-45秒后冷却液温度下降5℃。If the temperature difference is less than 3°C, the cooling scheme is to maintain the coolant at the current temperature for 35-45 seconds, and then drop the coolant temperature by 5°C after 35-45 seconds.
若温度差大于等于3℃且小于等于4℃，冷却方案为冷却液以当前温度维持55-65秒，55-65秒后冷却液温度下降5℃。If the temperature difference is greater than or equal to 3°C and less than or equal to 4°C, the cooling scheme is to maintain the coolant temperature at the current temperature for 55-65 seconds, and then drop the coolant temperature by 5°C after 55-65 seconds.
若温度差大于4℃，冷却方案为冷却液当前温度维持75-80秒，75-85秒后冷却液温度下降5℃。If the temperature difference is greater than 4°C, the cooling scheme is to maintain the current temperature of the coolant for 75-80 seconds, and then drop the coolant temperature by 5°C after 75-85 seconds.
可选的，电池模组中的电池分为3行，每行10个以矩形形状整齐排列。Optionally, the batteries in the battery module are divided into 3 rows, and 10 batteries in each row are neatly arranged in a rectangular shape.
电池模组从下至上、从左至右，设置第一行的第一个电池、第六个电池、第十个电池为标定电池，第二行的第一个电池、第十个电池为标定电池，第三行的第一个电池、第六个电池、第十个电池为标定电池。Battery module from bottom to top, from left to right, set the first battery, sixth battery, and tenth battery in the first row as the calibration battery, and set the first battery and tenth battery in the second row as the calibration battery Battery, the first battery, sixth battery, and tenth battery in the third row are calibration batteries.
散热管道从电池模组的第一行电池下方开始，以S型依次穿过第一行电池的下方、第一行电池与第二行电池的中间、第二行电池与第三行电池的中间和第三行的上方，将多个电池包围，用于给多个电池散热。The heat dissipation pipe starts from the bottom of the first row of batteries of the battery module, and passes through the bottom of the first row of batteries, the middle of the first row of batteries and the second row of batteries, and the middle of the second row of batteries and the third row of batteries. And above the third row, the multiple batteries are surrounded to dissipate heat for the multiple batteries.
可选的，电池模组和散热管道之间具有高导热散热硅胶。Optionally, there is high thermal conductivity and heat dissipation silica gel between the battery module and the heat dissipation pipe.
第二方面，本发明还提供一种用于汽车动力电池模组冷却的方法，运行于第一方面所述的用于汽车动力电池模组的冷却系统上，包括以下步骤：In a second aspect, the present invention also provides a method for cooling an automotive power battery module, which operates on the cooling system for an automotive power battery module described in the first aspect, and includes the following steps:
步骤1，温度传感器实时监测标定电池，温度传感器将每个标定电池的温度信息传输至车载ECU；当车载ECU检测到任一标定电池温度达到40℃时，车载ECU控制冷却液控制模块输出冷却液至散热管道内，冷却液初始温度为35℃。Step 1, the temperature sensor monitors the calibration battery in real time, and the temperature sensor transmits the temperature information of each calibration battery to the on-board ECU; when the on-board ECU detects that the temperature of any calibrated battery reaches 40°C, the on-board ECU controls the coolant control module to output coolant To the heat dissipation pipe, the initial temperature of the coolant is 35℃.
步骤2，车载ECU计算多个标定电池实时温度的多个温度差，确定多个温度差中的最大温度差，得到最大温度差ΔT，最大温度差的计算公式为：Step 2, the on-board ECU calculates multiple temperature differences of the real-time temperature of multiple calibrated batteries, determines the maximum temperature difference among the multiple temperature differences, and obtains the maximum temperature difference ΔT. The calculation formula of the maximum temperature difference is:
ΔT＝T1-T2ΔT=T1-T2
其中，T1为最大温度标定电池温度，T2为最小温度标定电池温度。Among them, T1 is the maximum temperature calibration battery temperature, T2 is the minimum temperature calibration battery temperature.
步骤3，车载ECU根据最大温度差ΔT实时控制冷却液控制模块执行冷却方案。Step 3, the on-board ECU controls the coolant control module in real time to execute the cooling scheme according to the maximum temperature difference ΔT.
若最大温度差ΔT<3℃时，冷却液控制模块控制冷却液当前温度维持35-45秒，35-45秒后，冷却液控制模块控制冷却液温度下降5℃。If the maximum temperature difference ΔT<3°C, the coolant control module controls the current temperature of the coolant to maintain for 35-45 seconds, and after 35-45 seconds, the coolant control module controls the coolant temperature to drop by 5°C.
若最大温度差ΔT≥3℃且ΔT≤4℃时，冷却液控制模块控制冷却液以当前温度维持55-65秒，55-65秒后，冷却液控制模块控制冷却液温度下降5℃。If the maximum temperature difference ΔT≥3°C and ΔT≤4°C, the coolant control module controls the coolant to maintain the current temperature for 55-65 seconds, and after 55-65 seconds, the coolant control module controls the coolant temperature to drop by 5°C.
若最大温度差ΔT>4℃时，冷却液控制模块控制冷却液当前温度维持75-85秒，75-85秒后，冷却液控制模块控制冷却液温度下降5℃。If the maximum temperature difference ΔT>4°C, the coolant control module controls the current temperature of the coolant to maintain for 75-85 seconds, and after 75-85 seconds, the coolant control module controls the coolant temperature to drop by 5°C.
步骤4，车载ECU获取电池模组中多个标定电池的温度信息，计算多个标定电池温度的平均温度。Step 4, the vehicle-mounted ECU acquires temperature information of multiple calibration batteries in the battery module, and calculates the average temperature of the multiple calibrated battery temperatures.
若多个标定电池温度的平均温度大于等于20℃，车载ECU重新执行步骤3。If the average temperature of the multiple calibrated battery temperatures is greater than or equal to 20°C, the on-board ECU executes step 3 again.
若多个标定电池温度的平均温度小于20℃，车载ECU控制冷却液控制模块结束冷却。If the average temperature of multiple calibrated battery temperatures is less than 20°C, the on-board ECU controls the coolant control module to end cooling.
可选的，温度传感器实时监测标定电池，温度传感器将每个标定电池的温度信息传输至温差计算模块。Optionally, the temperature sensor monitors the calibration battery in real time, and the temperature sensor transmits the temperature information of each calibration battery to the temperature difference calculation module.
温差计算模块计算多个标定电池实时温度的多个温度差，得到多个温度差，将多个温度差传输至车载ECU。The temperature difference calculation module calculates multiple temperature differences of the real-time temperature of the calibrated batteries, obtains multiple temperature differences, and transmits the multiple temperature differences to the on-board ECU.
本发明的有益效果是：本发明提供一种用于汽车动力电池模组冷却的系统、方法，在散热管道不变的前提下，采集温度，计算温度差，通过最大温度差，选择冷却液温度、维持时间可变的汽车动力电池模组冷却方案，尤其在汽车动力电池模组高温高倍率运行状态下，可以有效减小电池模组内单体电池之间的温度差异，提升电池的一致性，延长电池使用寿命，增加行车安全性，并且有效降低成本。The beneficial effects of the present invention are as follows: the present invention provides a system and method for cooling an automotive power battery module. On the premise that the heat dissipation pipe remains unchanged, the temperature is collected, the temperature difference is calculated, and the temperature of the cooling liquid is selected according to the maximum temperature difference. . The cooling solution for automotive power battery modules with variable maintenance time, especially in the high-temperature and high-rate operation state of automotive power battery modules, can effectively reduce the temperature difference between the single cells in the battery module and improve the consistency of the battery. , prolong battery life, increase driving safety, and effectively reduce costs.
附图说明Description of drawings
图1为本发明实施例提供的一种用于汽车动力电池模组的冷却系统的框架示意图；FIG. 1 is a schematic frame diagram of a cooling system for an automotive power battery module according to an embodiment of the present invention;
图2为本发明实施例提供的另一种用于汽车动力电池模组的冷却系统的框架示意图FIG. 2 is a schematic frame diagram of another cooling system for an automotive power battery module provided by an embodiment of the present invention
图3为本发明实施例提供的一种用于汽车动力电池模组的冷却系统中冷却方案的示意图；3 is a schematic diagram of a cooling solution in a cooling system for an automotive power battery module provided by an embodiment of the present invention;
图4为本发明实施例提供的一种用于汽车动力电池模组的冷却系统中电池模组的布局示意图；4 is a schematic layout diagram of a battery module in a cooling system for an automotive power battery module according to an embodiment of the present invention;
图5为本发明实施例提供的一种用于汽车动力电池模组的冷却方法的流程图。FIG. 5 is a flowchart of a cooling method for an automotive power battery module according to an embodiment of the present invention.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
如下结合附图进行说明，如图1所示，本发明实施例提供一种用于汽车动力电池模组的冷却系统，包括：电池模组、多个温度传感器，车载ECU(Electronic Control Unit)，冷却液控制模块以及散热管道。As shown in FIG. 1 , an embodiment of the present invention provides a cooling system for an automotive power battery module, including: a battery module, a plurality of temperature sensors, an on-board ECU (Electronic Control Unit), Coolant control module and cooling pipes.
散热管道包围电池模组，电池模组由若干个电池组成，在若干个电池中选取多个标定电池；多个标定电池与多个温度传感器一一对应连接。The heat dissipation pipe surrounds the battery module, the battery module is composed of several batteries, and a plurality of calibration batteries are selected from the plurality of batteries; the plurality of calibration batteries are connected with a plurality of temperature sensors in one-to-one correspondence.
每个温度传感器用于测量对应标定电池的实时温度。Each temperature sensor is used to measure the real-time temperature of the corresponding calibrated battery.
散热管道将电池模组的多个电池包围在其中，电池模组由多个单体电池组成，在多个单体电池中，选取若干个单体电池，确定选取到的单体电池为标定电池，标定电池的数量大于两个，且标定电池的数量不超过单体电池的数量。温度传感器与标定电池连接，用于获取标定电池的温度信息，为了方便采集与计算，若单体电池为方形电池，则选取方形电池的表面中心处为测温点；若单体电池为圆柱形电池，则选取圆柱形电池的上表面处为测温点。The heat dissipation pipe surrounds the multiple batteries of the battery module, and the battery module is composed of multiple single cells. Among the multiple single cells, several single cells are selected, and the selected single cell is determined as the calibration battery. , the number of calibration batteries is greater than two, and the number of calibration batteries does not exceed the number of single batteries. The temperature sensor is connected to the calibration battery to obtain the temperature information of the calibration battery. In order to facilitate collection and calculation, if the single battery is a square battery, the center of the surface of the square battery is selected as the temperature measurement point; if the single battery is cylindrical For batteries, the upper surface of the cylindrical battery is selected as the temperature measurement point.
每个温度传感器与车载ECU连接，用于将对应标定电池的实时温度信息传输至车载ECU。Each temperature sensor is connected to the on-board ECU for transmitting the real-time temperature information of the corresponding calibrated battery to the on-board ECU.
温度控制模块与车载ECU连接，将获取到的所有标定电池的实时温度传输给车载ECU。The temperature control module is connected with the on-board ECU, and transmits the real-time temperature of all the calibrated batteries obtained to the on-board ECU.
车载ECU用于根据若干个标定电池的实时温度，控制冷却液控制模块开始、结束冷却工作。The on-board ECU is used to control the cooling liquid control module to start and end the cooling work according to the real-time temperature of several calibrated batteries.
车载ECU用于计算多个标定电池实时温度的多个温度差，确定多个温度差中的最大温度差；车载ECU用于根据最大温度差确定冷却液温度、维持时长可变的冷却方案后，控制冷却液控制模块执行确定后的冷却液温度、维持时长可变的冷却方案。The on-board ECU is used to calculate multiple temperature differences of the real-time temperatures of the calibrated batteries, and determine the maximum temperature difference among the multiple temperature differences; the on-board ECU is used to determine the coolant temperature according to the maximum temperature difference and maintain a cooling scheme with a variable duration. Controls the coolant control module to implement a cooling scheme with a determined coolant temperature and a variable duration.
车载ECU与冷却液控制模块连接，车载ECU检测传递的标定电池的温度信息，当检测到任一标定电池的温度信息达到40℃时，车载ECU控制冷却液控制模块开始工作；车载ECU计算标定电池的多个温度差，并确定多个温度差中的最大温度差，根据最大温度差确定需要执行的冷却方案，根据确定的冷却方案控制冷却液控制模块执行相应的冷却方案。The on-board ECU is connected with the coolant control module. The on-board ECU detects the temperature information of the calibration battery transmitted. When it detects that the temperature information of any calibration battery reaches 40°C, the on-board ECU controls the coolant control module to start working; the on-board ECU calculates and calibrates the battery. and determine the maximum temperature difference among the multiple temperature differences, determine the cooling scheme to be executed according to the maximum temperature difference, and control the cooling liquid control module to execute the corresponding cooling scheme according to the determined cooling scheme.
冷却液控制模块用于控制冷却液输出至散热管道内；冷却液控制模块用于降低冷却液温度。The cooling liquid control module is used to control the output of the cooling liquid to the cooling pipe; the cooling liquid control module is used to reduce the cooling liquid temperature.
冷却液控制模块控制冷却液输出到散热管道内，冷却液控制模块用于降低冷却液温度。The cooling liquid control module controls the output of the cooling liquid to the cooling pipe, and the cooling liquid control module is used to reduce the temperature of the cooling liquid.
本发明实施例提供的一种用于汽车动力电池模组的冷却系统，通过监测电池模组中标定电池的实时温度信息，通过温度变化，车载ECU确定冷却方案，控制冷却液控制模块对电池模组进行冷却，通过电池模组中电池之间的温差，选取适合的冷却方案，有效减小电池组内电池单体之间的温度差异，提升电池的一致性，延长电池使用寿命，增加行车安全性，并且有效降低成本。An embodiment of the present invention provides a cooling system for an automotive power battery module. By monitoring the real-time temperature information of the calibrated battery in the battery module, the vehicle-mounted ECU determines a cooling scheme through temperature changes, and controls the cooling liquid control module to control the battery module. The battery pack is cooled. According to the temperature difference between the batteries in the battery module, an appropriate cooling scheme is selected to effectively reduce the temperature difference between the battery cells in the battery pack, improve the consistency of the battery, prolong the battery life, and increase driving safety. , and effectively reduce costs.
在上述发明实施例的基础上，本发明实施例还提供一种用于汽车动力电池模组的冷却系统，如下结合附图进行说明，如图2所示，本发明实施例还提供一种用于汽车动力电池模组的冷却系统，还包括：温差计算模块。On the basis of the above embodiments of the present invention, the embodiments of the present invention further provide a cooling system for an automotive power battery module, which is described below with reference to the accompanying drawings. As shown in FIG. 2 , the embodiments of the present invention also provide a cooling system for The cooling system for the automotive power battery module also includes: a temperature difference calculation module.
每个温度传感器与温差计算模块连接，用于将每个标定电池的实时温度信息传输至温差计算模块。Each temperature sensor is connected with the temperature difference calculation module for transmitting the real-time temperature information of each calibrated battery to the temperature difference calculation module.
温度控制模块与温差计算模块连接，用于将实时获取到的标定电池的温度信息传输给温差计算模块。The temperature control module is connected with the temperature difference calculation module, and is used for transmitting the temperature information of the calibration battery obtained in real time to the temperature difference calculation module.
温差计算模块计算多个标定电池实时温度的多个温度差。The temperature difference calculation module calculates a plurality of temperature differences of the real-time temperatures of the calibration batteries.
温差计算模块根据标定电池的温度信息计算多个标定电池的多个温度差。The temperature difference calculation module calculates a plurality of temperature differences of the calibration batteries according to the temperature information of the calibration batteries.
温差计算模块与车载ECU连接，用于将多个温度差传输至车载ECU。The temperature difference calculation module is connected with the on-board ECU for transmitting multiple temperature differences to the on-board ECU.
温差计算模块与车载ECU连接，温差计算模块根据标定电池的温度信息计算多个标定电池的多个温度差，并将多个温度差传输给车载ECU。The temperature difference calculation module is connected with the vehicle ECU, and the temperature difference calculation module calculates multiple temperature differences of multiple calibration batteries according to the temperature information of the calibration batteries, and transmits the multiple temperature differences to the vehicle ECU.
本发明实施例提供的一种用于汽车动力电池模组的冷却系统，通过温差计算模块代替车载ECU进行温差的计算，减轻了车载ECU的工作，保证了车载ECU的工作可以更加精准的控制冷却模块进行散热。In a cooling system for an automotive power battery module provided by an embodiment of the present invention, the temperature difference calculation module replaces the on-board ECU to calculate the temperature difference, which reduces the work of the on-board ECU and ensures that the work of the on-board ECU can control the cooling more accurately. module for cooling.
在上述实施例的基础上，本发明还提供一种用于汽车动力电池模组的冷却系统中的冷却方案，如下结合附图进行说明，如图3所示，一种用于汽车动力电池模组的冷却系统，冷却液温度、维持时长可变的冷却方案，包括：On the basis of the above-mentioned embodiments, the present invention also provides a cooling solution for a cooling system for an automotive power battery module, which will be described below with reference to the accompanying drawings. As shown in FIG. 3 , a cooling solution for an automotive power battery module The cooling system of the group, the cooling scheme with variable coolant temperature and maintenance time, including:
若最大温度差小于3℃，冷却方案为冷却液以当前温度维持35-45秒，35-45秒后冷却液温度下降5℃。If the maximum temperature difference is less than 3°C, the cooling scheme is to maintain the coolant temperature at the current temperature for 35-45 seconds, and then drop the coolant temperature by 5°C after 35-45 seconds.
车载ECU通过最大温度差确定接下来要执行的具体的冷却方案，若最大温度差小于3℃，冷却方案为冷却液以当前温度维持35-45秒，35-45秒后冷却液温度下降5℃。The on-board ECU determines the specific cooling scheme to be executed next according to the maximum temperature difference. If the maximum temperature difference is less than 3°C, the cooling scheme is that the coolant maintains the current temperature for 35-45 seconds, and after 35-45 seconds, the coolant temperature drops by 5°C .
若最大温度差大于等于3℃且小于等于4℃，冷却方案为冷却液以当前温度维持55-65秒，55-65秒后冷却液温度下降5℃。If the maximum temperature difference is greater than or equal to 3°C and less than or equal to 4°C, the cooling scheme is to maintain the coolant temperature at the current temperature for 55-65 seconds, and then drop the coolant temperature by 5°C after 55-65 seconds.
车载ECU通过最大温度差确定接下来要执行的具体的冷却方案，若最大温度差大于等于3℃且小于等于4℃，冷却方案为冷却液以当前温度维持55-65秒，55-65秒后冷却液温度下降5℃。The on-board ECU determines the specific cooling plan to be executed next based on the maximum temperature difference. If the maximum temperature difference is greater than or equal to 3 °C and less than or equal to 4 °C, the cooling plan is that the coolant is maintained at the current temperature for 55-65 seconds, and after 55-65 seconds The coolant temperature drops by 5°C.
若最大温度差大于4℃，冷却方案为冷却液当前温度维持75-80秒，75-85秒后冷却液温度下降5℃。If the maximum temperature difference is greater than 4°C, the cooling scheme is to maintain the current temperature of the coolant for 75-80 seconds, and then drop the coolant temperature by 5°C after 75-85 seconds.
车载ECU通过最大温度差确定接下来要执行的具体的冷却方案，若最大温度差大于4℃，冷却方案为冷却液当前温度维持75-80秒，75-85秒后冷却液温度下降5℃。The on-board ECU determines the specific cooling scheme to be executed next based on the maximum temperature difference. If the maximum temperature difference is greater than 4°C, the cooling scheme is to maintain the current temperature of the coolant for 75-80 seconds, and then drop the coolant temperature by 5°C after 75-85 seconds.
本发明实施例提供的一种一种用于汽车动力电池模组的冷却系统，通过根据不同的最大温度差选择相对应的冷却方案进行散热，有效减小电池组内电池单体之间的温度差异，提升电池的一致性，延长电池使用寿命，增加行车安全性，并且有效降低成本。An embodiment of the present invention provides a cooling system for an automotive power battery module, which effectively reduces the temperature between battery cells in a battery pack by selecting a corresponding cooling scheme according to different maximum temperature differences to dissipate heat. difference, improve the consistency of the battery, prolong the service life of the battery, increase the driving safety, and effectively reduce the cost.
在上述发明实施例的基础上，本发明实施例还提供一种用于汽车动力电池模组的冷却系统中电池模组的布局，如下结合附图进行说明，如图4所示，一种用于汽车动力电池模组的冷却系统，电池模组中的电池分为3行，每行10个以矩形形状整齐排列。On the basis of the above embodiments of the invention, the embodiments of the present invention also provide a layout of a battery module in a cooling system for an automotive power battery module, which is described below with reference to the accompanying drawings. As shown in FIG. For the cooling system of the automotive power battery module, the batteries in the battery module are divided into 3 rows, and 10 cells in each row are neatly arranged in a rectangular shape.
电池模组以3X10的格式排列，一共分为3行，每行10个单体电池。The battery modules are arranged in a 3X10 format and are divided into 3 rows with 10 single cells in each row.
电池模组从下至上、从左至右，设置第一行的第一个电池、第六个电池、第十个电池为标定电池，第二行的第一个电池、第十个电池为标定电池，第三行的第一个电池、第六个电池、第十个电池为标定电池。Battery module from bottom to top, from left to right, set the first battery, sixth battery, and tenth battery in the first row as the calibration battery, and set the first battery and tenth battery in the second row as the calibration battery Battery, the first battery, sixth battery, and tenth battery in the third row are calibration batteries.
散热管道从电池模组的第一行电池下方开始，以S型依次穿过第一行电池的下方、第一行电池与第二行电池的中间、第二行电池与第三行电池的中间和第三行的上方，将多个电池包围，用于给多个电池散热。The heat dissipation pipe starts from the bottom of the first row of batteries of the battery module, and passes through the bottom of the first row of batteries, the middle of the first row of batteries and the second row of batteries, and the middle of the second row of batteries and the third row of batteries. And above the third row, the multiple batteries are surrounded to dissipate heat for the multiple batteries.
电池模组和散热管道之间具有高导热散热硅胶。There is high thermal conductivity and heat dissipation silica gel between the battery module and the heat dissipation pipe.
为了良好的散热，增大电池模组的散热面积，电池和散热管道中间填充有高导热散热硅胶。For good heat dissipation, the heat dissipation area of the battery module is increased, and the battery and the heat dissipation pipe are filled with high thermal conductivity and heat dissipation silica gel.
散热管道S型包围在单体电池两侧，用以给多个单体电池同时进行散热。The S-shaped heat dissipation pipe surrounds both sides of the single cell to dissipate heat for multiple single cells at the same time.
本发明实施例提供的一种用于汽车动力电池模组的冷却系统中电池模组的布局，由于冷却液进出口处及散热管道转角处单体电池温度相差较大，通过选取多个标定电池，且多个标定电池之间相隔一定的距离，尽可能的获取到单体电池的多个温度，最大化的保证了系统运行时的可靠性。The layout of the battery module in a cooling system for an automotive power battery module provided by the embodiment of the present invention, due to the large difference in temperature of the single battery at the inlet and outlet of the cooling liquid and the corner of the heat dissipation pipe, by selecting a plurality of calibration batteries , and multiple calibration batteries are separated by a certain distance, so as to obtain multiple temperatures of the single battery as much as possible, which maximizes the reliability of the system during operation.
本发明实施例还提供一种用于汽车动力电池模组冷却的方法，如下结合附图进行说明，如图5所示，本发明实施例还提供一种用于汽车动力电池模组冷却的方法，运行于权利要求1所述的一种用于汽车动力电池模组的冷却系统上，包括以下步骤：Embodiments of the present invention also provide a method for cooling an automotive power battery module, which is described below with reference to the accompanying drawings. As shown in FIG. 5 , an embodiment of the present invention also provides a method for cooling an automotive power battery module. , running on a cooling system for an automotive power battery module according to claim 1, comprising the following steps:
步骤1，温度传感器实时监测标定电池，温度传感器将每个标定电池的温度信息传输至车载ECU；当车载ECU检测到任一标定电池温度达到40℃时，车载ECU控制冷却液控制模块输出冷却液至散热管道内，冷却液初始温度为35℃。Step 1, the temperature sensor monitors the calibration battery in real time, and the temperature sensor transmits the temperature information of each calibration battery to the on-board ECU; when the on-board ECU detects that the temperature of any calibrated battery reaches 40°C, the on-board ECU controls the coolant control module to output coolant To the heat dissipation pipe, the initial temperature of the coolant is 35℃.
步骤2，车载ECU计算多个标定电池实时温度的多个温度差，确定多个温度差中的最大温度差，得到最大温度差ΔT，最大温度差的计算公式为：Step 2, the on-board ECU calculates multiple temperature differences of the real-time temperature of multiple calibrated batteries, determines the maximum temperature difference among the multiple temperature differences, and obtains the maximum temperature difference ΔT. The calculation formula of the maximum temperature difference is:
ΔT＝T1-T2ΔT=T1-T2
其中，T1为最大温度标定电池温度，T2为最小温度标定电池温度。Among them, T1 is the maximum temperature calibration battery temperature, T2 is the minimum temperature calibration battery temperature.
步骤3，车载ECU根据最大温度差ΔT实时控制冷却液控制模块执行冷却方案。Step 3, the on-board ECU controls the coolant control module in real time to execute the cooling scheme according to the maximum temperature difference ΔT.
若最大温度差ΔT<3℃时，冷却液控制模块控制冷却液当前温度维持35-45秒，35-45秒后，冷却液控制模块控制冷却液温度下降5℃。If the maximum temperature difference ΔT<3°C, the coolant control module controls the current temperature of the coolant to maintain for 35-45 seconds, and after 35-45 seconds, the coolant control module controls the coolant temperature to drop by 5°C.
若最大温度差ΔT≥3℃且ΔT≤4℃时，冷却液控制模块控制冷却液以当前温度维持55-65秒，55-65秒后，冷却液控制模块控制冷却液温度下降5℃。If the maximum temperature difference ΔT≥3°C and ΔT≤4°C, the coolant control module controls the coolant to maintain the current temperature for 55-65 seconds, and after 55-65 seconds, the coolant control module controls the coolant temperature to drop by 5°C.
若最大温度差ΔT>4℃时，冷却液控制模块控制冷却液当前温度维持75-85秒，75-85秒后，冷却液控制模块控制冷却液温度下降5℃。If the maximum temperature difference ΔT>4°C, the coolant control module controls the current temperature of the coolant to maintain for 75-85 seconds, and after 75-85 seconds, the coolant control module controls the coolant temperature to drop by 5°C.
步骤4，车载ECU获取电池模组中多个标定电池的温度信息，计算多个标定电池温度的平均温度。Step 4, the vehicle-mounted ECU acquires temperature information of multiple calibration batteries in the battery module, and calculates the average temperature of the multiple calibrated battery temperatures.
若多个标定电池温度的平均温度大于等于20℃，车载ECU重新执行步骤3。If the average temperature of the multiple calibrated battery temperatures is greater than or equal to 20°C, the on-board ECU executes step 3 again.
若多个标定电池温度的平均温度小于20℃，车载ECU控制冷却液控制模块结束冷却。If the average temperature of multiple calibrated battery temperatures is less than 20°C, the on-board ECU controls the coolant control module to end cooling.
温度传感器实时监测标定电池，温度传感器将每个标定电池的温度信息传输至温差计算模块。The temperature sensor monitors the calibration battery in real time, and the temperature sensor transmits the temperature information of each calibration battery to the temperature difference calculation module.
温差计算模块计算多个标定电池实时温度的多个温度差，得到多个温度差，将多个温度差传输至车载ECU。The temperature difference calculation module calculates multiple temperature differences of the real-time temperature of the calibrated batteries, obtains multiple temperature differences, and transmits the multiple temperature differences to the on-board ECU.
本发明提供的一种电动汽车动力电池散热的冷却方法，车载ECU根据标定电池的实时温度信息控制冷却液控制模块进行工作，通过对冷却液的温度和维持时间进行改变，在汽车电池以高温高倍率运行状态下，可以有效减小电池组内电池单体之间的温度差异，提升电池的一致性，延长电池使用寿命，增加行车安全性，并且有效降低成本。在现有电动汽车电池冷却管路基础上，相比于传统冷却方式，在结构不变的前提下，不需要增加额外的结构，只需将控制算法策略嵌入到上述车载ECU中，即可实现冷却性能的提升，满足电池一致性要求。The invention provides a cooling method for heat dissipation of electric vehicle power battery. The on-board ECU controls the cooling liquid control module to work according to the real-time temperature information of the calibrated battery. Under the multi-rate operation state, it can effectively reduce the temperature difference between the battery cells in the battery pack, improve the consistency of the battery, prolong the battery life, increase the driving safety, and effectively reduce the cost. On the basis of the existing electric vehicle battery cooling pipeline, compared with the traditional cooling method, under the premise of the same structure, there is no need to add additional structures, and it is only necessary to embed the control algorithm strategy into the above-mentioned on-board ECU. The cooling performance is improved to meet the battery consistency requirements.
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换，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. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still understand the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention, if the technical solution described is modified, or some technical features thereof are equivalently replaced. Inside.
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| CN111628237A (en)* | 2019-02-27 | 2020-09-04 | 北京新能源汽车股份有限公司 | Control method and device of battery thermal management system and controller |
| CN213071218U (en)* | 2020-09-29 | 2021-04-27 | 扬州大学 | Novel thermal management device for vehicle lithium battery |
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