CN110780140A - A test method of battery management system for energy storage power station - Google Patents
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Abstract
本发明公开了一种用于储能电站的电池管理系统测试方法，本发明为了解决储能电站中电池管理系统的测量技术问题。本发明提出利用硬件系统测试平台，对储能电站电池管理系统的基本参数测量精度、荷电状态估算精度、健康状态估算精度、电量均衡功能、故障诊断功能进行测试验证，取得较为全面的储能电站的电池管理系统的测试数据。
The invention discloses a battery management system testing method for an energy storage power station, and the invention aims to solve the technical problem of measuring the battery management system in the energy storage power station. The invention proposes to use the hardware system test platform to test and verify the basic parameter measurement accuracy, state of charge estimation accuracy, health state estimation accuracy, power balance function and fault diagnosis function of the battery management system of the energy storage power station, so as to obtain a more comprehensive energy storage system. Test data for the battery management system of the power station.
Description
技术领域technical field
本发明涉及电池管理系统测试领域，具体涉及一种用于储能电站电池的管理系统测试方法。The invention relates to the field of battery management system testing, in particular to a management system testing method for batteries in an energy storage power station.
背景技术Background technique
近年来，随着锂离子电池技术的不断发展，追求高能量密度、高功率密度、长续航能力电池的脚步从未停歇，而随着大规模储能系统广泛应用于输电、发电、配电、用电等电力服务领域，其安全性越来越受到各界的关注。电池管理系统(Battery ManagementSystem.BMS)是电池储能系统必不可少的组成部分，承担电池运行状态监控、故障诊断、故障预警、安全保护、能量管理以及均衡等任务。BMS性能优劣一定程度上决定了电池储能系统的安全性和可靠性。但目前对于BMS的测试标准大多局限于电动汽车BMS，缺少完善的电池储能电站BMS相关测试方法。In recent years, with the continuous development of lithium-ion battery technology, the pursuit of batteries with high energy density, high power density and long battery life has never stopped. In the field of electric power services such as electricity, its safety has attracted more and more attention from all walks of life. The battery management system (Battery ManagementSystem.BMS) is an indispensable part of the battery energy storage system, and undertakes tasks such as battery operating status monitoring, fault diagnosis, fault warning, safety protection, energy management and balance. The performance of BMS determines the safety and reliability of the battery energy storage system to a certain extent. However, the current testing standards for BMS are mostly limited to electric vehicle BMS, and there is a lack of perfect BMS related testing methods for battery energy storage power stations.
发明内容SUMMARY OF THE INVENTION
为了解决现有的电池管理系统测试方法大多是用于电动汽车，缺少用于储能电站BMS的专用测试方法的问题，本发明的目的就是提供一种用于储能电站电池的管理系统测试方法。In order to solve the problem that most of the existing battery management system test methods are used for electric vehicles and lack a special test method for the BMS of the energy storage power station, the purpose of the present invention is to provide a management system test method for the battery of the energy storage power station .
为了达到所述目的，本发明提出了一种用于储能电站电池的管理系统测试方法。利用硬件系统测试平台，模拟真实电池的充放电特性，提供测试过程中的实验所用的模拟电池单体或电池系统，对储能电站电池管理系统的电压测量精度、电流测量精度以及温度测量精度、SOC估算精度、SOH估算精度、电量均衡功能、故障诊断功能进行测试验证，取得较为全面的测试数据。In order to achieve the objective, the present invention proposes a method for testing a management system of a battery in an energy storage power station. Use the hardware system test platform to simulate the charging and discharging characteristics of the real battery, provide the simulated battery cell or battery system used in the experiment during the test process, and measure the voltage measurement accuracy, current measurement accuracy and temperature measurement accuracy of the battery management system of the energy storage power station. SOC estimation accuracy, SOH estimation accuracy, cell balancing function, and fault diagnosis function are tested and verified, and more comprehensive test data are obtained.
一种用于储能电站的电池管理系统测试方法，利用硬件系统测试平台，对储能电站电池管理系统的基本参数测量精度、荷电状态估算精度、健康状态估算精度、电量均衡功能、故障诊断功能进行测试验证，取得储能电站的电池管理系统的测试数据。A battery management system test method for an energy storage power station, using a hardware system test platform to measure the basic parameter measurement accuracy, state of charge estimation accuracy, health state estimation accuracy, power balance function, and fault diagnosis of a battery management system of an energy storage power station The function is tested and verified, and the test data of the battery management system of the energy storage power station is obtained.
进一步地，所述硬件系统测试平台用于模拟真实电池的充放电特性，提供测试过程中的实验所用的模拟电池单体或电池系统。Further, the hardware system test platform is used to simulate the charging and discharging characteristics of a real battery, and provides simulated battery cells or battery systems used in experiments in the testing process.
进一步地，所述基本参数测量精度，包括电压测量精度、电流测量精度以及温度测量精度。Further, the basic parameter measurement accuracy includes voltage measurement accuracy, current measurement accuracy and temperature measurement accuracy.
进一步地，所述基本参数测量精度，测量步骤如下：Further, the basic parameter measurement accuracy, the measurement steps are as follows:
1)硬件系统测试平台提供电压为U0的电池或电池组，记录电池管理系统上报该电池或电池组的电压为U1，则该电池管理系统对电池或电池组的电压测量精度为(U1-U0)/U0×100％；1) The hardware system test platform provides a battery or battery pack with a voltage of U 0 , and records the voltage of the battery or battery pack reported by the battery management system as U 1 , then the battery management system measures the battery or battery pack’s voltage with a precision of (U 1 -U 0 )/U 0 ×100%;
2)硬件系统测试平台提供电压为U0的电池或电池组，并对电池或电池组进行恒流I0放电操作，记录电池管理系统上报该电池或电池组的放电电流为I1，则该电池管理系统的电流测量精度为(I1-I0)/I0×100％；2) The hardware system test platform provides a battery or battery pack with a voltage of U 0 , and performs a constant current I 0 discharge operation on the battery or battery pack, and records that the battery management system reports that the discharge current of the battery or battery pack is I 1 , then the The current measurement accuracy of the battery management system is (I 1 -I 0 )/I 0 ×100%;
3)硬件系统测试平台提供电压为U0的电池或电池组，设定电池或电池组温度为T0，记录电池管理系统上报该电池或电池组的温度为T1，则该电池管理系统的温度测量精度为(T1-T0)/T0×100％。3) The hardware system test platform provides a battery or battery pack with a voltage of U 0 , sets the temperature of the battery or battery pack as T 0 , and records the temperature of the battery or battery pack reported by the battery management system as T 1 , then the battery management system’s temperature The temperature measurement accuracy is (T 1 -T 0 )/T 0 ×100%.
进一步地，所述荷电状态估算精度，测试步骤如下：Further, the test steps for the estimation accuracy of the state of charge are as follows:
1)通过硬件测试平台设定模拟电池系统的当前荷电状态值为SOC0；1) Set the current state of charge value of the simulated battery system to SOC 0 through the hardware test platform;
2)记录电池管理系统当前上报的荷电状态值，记为SOCc0；2) record the state of charge value currently reported by the battery management system, denoted as SOC c0 ;
3)对模拟电池系统进行指定充放电操作，记录硬件测试平台上报的模拟电池系统当前荷电状态值，记为SOC1；3) Perform a specified charge and discharge operation on the simulated battery system, record the current state of charge value of the simulated battery system reported by the hardware test platform, and denote it as SOC 1 ;
4)记录电池管理系统当前上报荷电状态值，记为SOCc1；4) record the state of charge value currently reported by the battery management system, denoted as SOC c1 ;
5)该电池管理系统的SOC估算精度为两次测量精度的均值，5) The SOC estimation accuracy of the battery management system is the average of the two measurement accuracy,
(|SOCc0-SOC0|/SOC0+|SOCc1-SOC1|/SOC1)/2×100％。(|SOC c0 -SOC 0 |/SOC 0 +|SOC c1 -SOC 1 |/SOC 1 )/2×100%.
进一步地，所述健康状态估算精度，由电池循环充放电次数计算。Further, the estimation accuracy of the state of health is calculated by the number of battery cycles of charge and discharge.
进一步地，由电池循环充放电次数计算电池健康状态估算精度时，具体测试步骤如下：Further, when calculating the battery state of health estimation accuracy from the number of battery cycles of charge and discharge, the specific test steps are as follows:
1)通过硬件测试平台设定模拟电池的当前健康状态值为SOH0，由电池管理系统估算该电池当前健康状态值，记为SOHc0；1) Set the current state of health value of the simulated battery as SOH 0 through the hardware test platform, and estimate the current state of health value of the battery by the battery management system, denoted as SOH c0 ;
2)根据电池标准充放电方法，对模拟电池系统循环充放电n次，n为正整数，n≤N×SOH0，其中，N为模拟电池系统额定充放电次数，记录硬件测试平台上报的模拟电池系统当前健康状态值，记为SOH1；2) According to the battery standard charging and discharging method, the simulated battery system is cyclically charged and discharged n times, n is a positive integer, n≤N×SOH 0 , where N is the rated charge and discharge times of the simulated battery system, record the simulation reported by the hardware test platform The current state of health value of the battery system, denoted as SOH 1 ;
3)由电池管理系统估算该电池当前健康状态值，记为SOHc1；3) Estimating the current state of health value of the battery by the battery management system, denoted as SOH c1 ;
4)该电池管理系统的健康状态估算精度为两次测量精度的均值，4) The state of health estimation accuracy of the battery management system is the average of the two measurement accuracy,
(|SOHc0-SOH0|/SOH0+|SOHc1-SOH1|/SOH1)/2×100％。(|SOH c0 -SOH 0 |/SOH 0 +|SOH c1 -SOH 1 |/SOH 1 )/2×100%.
进一步地，所述电量均衡功能，测试步骤如下：Further, for the power balancing function, the test steps are as follows:
1)通过硬件测试平台设定m节模拟电池单体的荷电状态值均为SOC0，其中m≥6；1) The state of charge value of m simulated battery cells is set to be SOC 0 through the hardware test platform, where m≥6;
3)对其中3节电池进行不同程度的充电操作，另3节电池进行不同程度的放电操作，使得该6节模拟电池单体的荷电状态值均不相等；3) Perform different levels of charging operations on 3 of the batteries, and perform different levels of discharge operations on the other 3 batteries, so that the state of charge values of the 6 simulated battery cells are not equal;
4)将所有单体电池连接成一个电池组，与电池管理系统连接；4) Connect all single cells into a battery pack and connect with the battery management system;
5)通过电池管理系统将该电池组充至满电状态；5) Charge the battery pack to a fully charged state through the battery management system;
6)通过硬件测试平台记录每节模拟电池的当前电量为Q1，Q2，Q3，…Qm，则该电池组的荷电状态差异为6) Record the current power of each simulated battery as Q 1 , Q 2 , Q 3 , ... Q m through the hardware test platform, then the state of charge difference of the battery pack is
进一步地，所述故障诊断功能，测试内容如下：Further, the fault diagnosis function, the test content is as follows:
1)通过硬件测试平台设定模拟电池或电池组温度值高于设定温度上限值，查看电池管理系统是否上报此故障；设定模拟电池或电池组温度值低于设定温度下限值，查看电池管理系统是否上报此故障；1) Set the simulated battery or battery pack temperature value higher than the set temperature upper limit through the hardware test platform, and check whether the battery management system reports this fault; set the simulated battery or battery pack temperature value to be lower than the set temperature lower limit value , check whether the battery management system reports this fault;
2)通过硬件测试平台设定模拟电池或电池组电压值高于设定电压上限值，查看电池管理系统是否上报此故障；设定模拟电池或电池组电压值低于设定电压下限值，查看电池管理系统是否上报此故障；2) Set the voltage value of the simulated battery or battery pack to be higher than the upper limit of the set voltage through the hardware test platform, and check whether the battery management system reports this fault; set the voltage value of the simulated battery or battery pack to be lower than the lower limit of the set voltage , check whether the battery management system reports this fault;
3)通过硬件测试平台设定流经模拟电池或电池组的电流值高于设定电流上限值，查看电池管理系统是否上报此故障；设定流经模拟电池或电池组的电流值低于设定电流下限值，查看电池管理系统是否上报此故障；3) Set the current value flowing through the simulated battery or battery pack to be higher than the set current upper limit through the hardware test platform, and check whether the battery management system reports this fault; set the current value flowing through the simulated battery or battery pack to be lower than Set the current lower limit value and check whether the battery management system reports this fault;
4)通过硬件测试平台设定模拟电池或电池组的荷电状态值高于荷电状态上限警报值，查看电池管理系统是否上报此故障；设定模拟电池或电池组的荷电状态值低于荷电状态下限警报值，查看电池管理系统是否上报此故障；4) Set the state of charge value of the simulated battery or battery pack to be higher than the upper limit alarm value of the state of charge through the hardware test platform, and check whether the battery management system reports this fault; set the state of charge value of the simulated battery or battery pack to be lower than The lower limit alarm value of the state of charge, check whether the battery management system reports this fault;
5)通过硬件测试平台设定模拟电池或电池组的健康状态值低于健康状态下限警报值，查看电池管理系统是否上报此故障；5) Set the health state value of the simulated battery or battery pack to be lower than the lower limit alarm value of the health state through the hardware test platform, and check whether the battery management system reports this fault;
通过电池管理系统的反应情况，对其故障诊断功能进行评估。Through the reaction of the battery management system, its fault diagnosis function is evaluated.
与现有技术相比，本发明的有益效果为：Compared with the prior art, the beneficial effects of the present invention are:
本发明提出了一种用于储能电站的电池管理系统测试方法，解决了现有的电池管理系统测试方法大多是用于电动汽车，缺少用于储能电站的专用测试方法的问题，两者的主要差别是应用场合不同以及电池组电压等级不同。本发明应用对象为储能电站中的电池管理系统，针对性地提出了专用测试方法对其基本参数测量精度、SOC估算精度、SOH估算功能、电量均衡功能、故障诊断功能的测试验证，使得测试结果更加全面。如果采用用于电动汽车电池管理系统测试方法对用于储能电站的电池管理系统进行功能测试，则其测试方法针对性不足，导致测试结果不够全面。因此，本发明提出的一种用于储能电站的电池管理系统测试方法可填补这一漏缺，针对性的对用于储能电站的电池管理系统进行测试，取得较为全面的测试结果。The invention proposes a battery management system test method for an energy storage power station, which solves the problem that most of the existing battery management system test methods are used for electric vehicles and lack a special test method for energy storage power stations. The main difference is that the application is different and the voltage level of the battery pack is different. The application object of the invention is the battery management system in the energy storage power station, and a special test method is proposed to test and verify its basic parameter measurement accuracy, SOC estimation accuracy, SOH estimation function, power balance function and fault diagnosis function, so that the test The results are more comprehensive. If the battery management system for electric vehicle battery management system is used for functional test, the test method is not targeted enough, resulting in insufficient test results. Therefore, a battery management system testing method for an energy storage power station proposed in the present invention can fill this gap, test the battery management system for an energy storage power station in a targeted manner, and obtain comprehensive test results.
附图说明Description of drawings
图1是BMS测试流程图。Figure 1 is the BMS test flow chart.
具体实施方式Detailed ways
下面对本发明的具体实施方式作进一步详细说明，所属实施例的目的在于对本发明进行更详细的阐述，便于理解，但本发明的应用场合和保护范围并不限于此。The specific embodiments of the present invention will be further described in detail below. The purpose of the examples is to describe the present invention in more detail for easy understanding, but the application and protection scope of the present invention are not limited thereto.
本发明的一种用于储能电站的电池管理系统测试方法，利用硬件系统测试平台，对储能电站电池管理系统的基本参数测量精度、荷电状态(State of Charge,SOC)估算精度、健康状态(State of Health,SOH)估算精度、电量均衡功能、故障诊断功能进行测试验证，取得较为全面的测试数据。A method for testing a battery management system for an energy storage power station of the present invention utilizes a hardware system test platform to measure the basic parameter measurement accuracy, state of charge (SOC) estimation accuracy, and health of the battery management system of the energy storage power station. State of Health (SOH) estimation accuracy, power balance function, and fault diagnosis function are tested and verified to obtain more comprehensive test data.
硬件系统测试平台，可模拟真实电池的充放电特性，提供测试过程中的实验所用的模拟电池单体或电池系统。The hardware system test platform can simulate the charging and discharging characteristics of real batteries, and provide simulated battery cells or battery systems used in experiments during the testing process.
基本参数测量精度，包括电压测量精度、电流测量精度以及温度测量精度。Basic parameter measurement accuracy, including voltage measurement accuracy, current measurement accuracy and temperature measurement accuracy.
通过如下步骤，对电池管理系统的基本参数测量精度进行测量并记录：The measurement accuracy of the basic parameters of the battery management system is measured and recorded by the following steps:
1)硬件系统测试平台提供电压为U0的电池(组)，记录BMS上报该电池(组)的电压为U1，则该BMS对电池(组)的电压测量精度为(U1-U0)/U0×100％；1) The hardware system test platform provides a battery (group) with a voltage of U 0 , and records that the voltage of the battery (group) reported by the BMS is U 1 , then the voltage measurement accuracy of the BMS on the battery (group) is (U 1 -U 0 ) )/U 0 × 100%;
2)硬件系统测试平台提供电压为U0的电池(组)，并对电池(组)进行恒流I0放电操作，记录BMS上报该电池(组)的放电电流为I1，则该BMS的电流测量精度为(I1-I0)/I0×100％；2) The hardware system test platform provides a battery (group) with a voltage of U0, and performs a constant current I0 discharge operation on the battery (group ) , and records that the BMS reports that the discharge current of the battery (group) is I1 , then the BMS The current measurement accuracy is (I 1 -I 0 )/I 0 ×100%;
3)硬件系统测试平台提供电压为U0的电池(组)，设定电池(组)温度为T0，记录BMS上报该电池(组)的温度为T1，则该BMS的温度测量精度为(T1-T0)/T0×100％；3) The hardware system test platform provides a battery (group) with a voltage of U 0 , sets the temperature of the battery (group) as T 0 , and records the temperature of the battery (group) reported by the BMS as T 1 , then the temperature measurement accuracy of the BMS is (T 1 -T 0 )/T 0 ×100%;
通过如下步骤，对电池管理系统的SOC估算精度进行测量并记录：The SOC estimation accuracy of the battery management system is measured and recorded by the following steps:
1)通过硬件测试平台设定模拟电池系统的当前SOC值为SOC0；1) Set the current SOC value of the simulated battery system to SOC 0 through the hardware test platform;
2)记录BMS当前上报的SOC值，记为SOCc0；2) record the SOC value currently reported by the BMS, denoted as SOC c0 ;
3)对模拟电池系统进行指定充放电操作(如FUDS工况)，记录硬件测试平台上报的模拟电池系统当前SOC值，记为SOC1；3) Perform a specified charge and discharge operation (such as FUDS operating condition) on the simulated battery system, record the current SOC value of the simulated battery system reported by the hardware test platform, and denote it as SOC 1 ;
4)记录BMS当前上报SOC值，记为SOCc1；4) record the SOC value currently reported by the BMS, denoted as SOC c1 ;
5)认为该BMS的SOC估算精度为两次测量精度的均值，如下式所示。5) It is considered that the SOC estimation accuracy of the BMS is the mean value of the two measurement accuracy, as shown in the following formula.
(|SOCc0-SOC0|/SOC0+|SOCc1-SOC1|/SOC1)/2×100％(|SOC c0 -SOC 0 |/SOC 0 +|SOC c1 -SOC 1 |/SOC 1 )/2×100%
由此对BMS的SOC估算精度进行评估。From this, the SOC estimation accuracy of the BMS is evaluated.
通过如下步骤，对电池管理系统的SOH估算精度进行测量并记录：The SOH estimation accuracy of the battery management system is measured and recorded by the following steps:
1)通过硬件测试平台设定模拟电池的当前SOH值为SOH0，由BMS估算该电池当前SOH值，记为SOHc0；1) Set the current SOH value of the simulated battery to SOH 0 by the hardware test platform, and estimate the current SOH value of the battery by BMS, which is denoted as SOH c0 ;
2)根据电池标准充放电方法，对模拟电池系统循环充放电n次(n为正整数，n≤N×SOH0，N为模拟电池系统额定充放电次数)，记录硬件测试平台上报的模拟电池系统当前SOH值，记为SOH1；2) According to the standard charging and discharging method of the battery, charge and discharge the simulated battery system n times (n is a positive integer, n≤N×SOH 0 , N is the rated charging and discharging times of the simulated battery system), and record the simulated battery reported by the hardware test platform The current SOH value of the system, denoted as SOH 1 ;
3)由BMS估算该电池当前SOH值，记为SOHc1；3) Estimate the current SOH value of the battery by BMS, denoted as SOH c1 ;
4)认为该BMS的SOH估算精度为两次测量精度的均值，如下式所示。4) It is considered that the SOH estimation accuracy of the BMS is the mean value of the two measurement accuracy, as shown in the following formula.
(|SOHc0-SOH0|/SOH0+|SOHc1-SOH1|/SOH1)/2×100％(|SOH c0 -SOH 0 |/SOH 0 +|SOH c1 -SOH 1 |/SOH 1 )/2×100%
由此对BMS的SOH估算精度进行评估。From this, the SOH estimation accuracy of the BMS is evaluated.
通过如下步骤，对电池管理系统的电量均衡功能进行测量并记录：The cell balancing function of the battery management system is measured and recorded by the following steps:
1)通过硬件测试平台设定m节(m≥6)模拟电池单体的SOC值均为SOC0；1) Set the SOC values of m sections (m≥6) simulated battery cells to be SOC 0 through the hardware test platform;
3)对其中3节电池进行不同程度的充电操作，3节电池进行不同程度的放电操作，使得其中6节模拟电池单体的SOC值均不相等；3) Perform different levels of charging operations on 3 of the batteries, and perform different levels of discharge operations on the 3 batteries, so that the SOC values of the 6 simulated battery cells are not equal;
4)将所有单体电池连接成一个电池组，与BMS连接；4) Connect all single cells into a battery pack and connect with BMS;
5)通过BMS将该电池组充至满电状态；5) Charge the battery pack to a fully charged state through BMS;
6)通过硬件测试平台记录每节模拟电池的当前电量为Q1，Q2，Q3，…Qm，则该电池组的SOC差异为6) Record the current power of each simulated battery as Q 1 , Q 2 , Q 3 , ... Q m through the hardware test platform, then the SOC difference of the battery pack is
由此对BMS的电量均衡进行评估。From this, the cell balancing of the BMS is evaluated.
测试验证电池管理系统的故障诊断功能，测试内容如下：The test verifies the fault diagnosis function of the battery management system. The test content is as follows:
1)通过硬件测试平台设定模拟电池(组)温度值高于设定上限值n℃(如n＝1)，查看BMS是否上报此故障；设定模拟电池(组)温度值低于设定下限值n℃(如n＝1)，查看BMS是否上报此故障；1) Set the temperature value of the simulated battery (group) to be higher than the set upper limit n°C (eg n=1) through the hardware test platform, and check whether the BMS reports this fault; set the temperature value of the simulated battery (group) to be lower than the set value. Set the lower limit n°C (for example, n=1), and check whether the BMS reports this fault;
2)通过硬件测试平台设定模拟电池(组)电压值高于设定上限值n V(如n＝0.2)，查看BMS是否上报此故障；设定模拟电池(组)电压值低于设定下限值n V(如n＝0.2)，查看BMS是否上报此故障；2) Set the voltage value of the simulated battery (group) to be higher than the set upper limit n V (eg n=0.2) through the hardware test platform, and check whether the BMS reports this fault; set the voltage value of the simulated battery (group) to be lower than the set value. Set the lower limit value n V (for example, n=0.2), and check whether the BMS reports this fault;
3)通过硬件测试平台设定流经模拟电池(组)的电流值高于设定上限值n A(如n＝0.2)，查看BMS是否上报此故障；设定流经模拟电池(组)的电流值低于设定下限值n A(如n＝0.2)，查看BMS是否上报此故障；3) Set the current value flowing through the simulated battery (group) higher than the set upper limit n A (eg n=0.2) through the hardware test platform, and check whether the BMS reports this fault; set the current value flowing through the simulated battery (group) The current value is lower than the set lower limit value n A (for example, n=0.2), check whether the BMS reports this fault;
4)通过硬件测试平台设定模拟电池(组)的SOC值高于上限警报值n％(如n＝1)，查看BMS是否上报此故障；设定模拟电池(组)的SOC值低于下限警报值n％(如n＝1)，查看BMS是否上报此故障；4) Set the SOC value of the simulated battery (group) to be higher than the upper limit alarm value n% (eg n=1) through the hardware test platform, and check whether the BMS reports this fault; set the SOC value of the simulated battery (group) to be lower than the lower limit Alarm value n% (for example, n=1), check whether the BMS reports this fault;
5)通过硬件测试平台设定模拟电池(组)的SOH值低于下限警报值n％(如n＝1)，查看BMS是否上报此故障；5) Set the SOH value of the simulated battery (group) to be lower than the lower limit alarm value n% (eg n=1) through the hardware test platform, and check whether the BMS reports this fault;
通过BMS的反应情况，对其故障诊断功能进行评估。Through the response of the BMS, its fault diagnosis function is evaluated.
实施例1Example 1
现以测试电池管理系统SOC估算精度为例，对发明内容进行阐述。通过如下步骤，对电池管理系统的SOC估算精度进行测量并记录：Now, the content of the invention is described by taking the test of the SOC estimation accuracy of the battery management system as an example. The SOC estimation accuracy of the battery management system is measured and recorded by the following steps:
1)通过硬件测试平台设定模拟电池系统的当前SOC值为SOC0；1) Set the current SOC value of the simulated battery system to SOC 0 through the hardware test platform;
2)记录BMS当前上报的SOC值，记为SOCc0；2) record the SOC value currently reported by the BMS, denoted as SOC c0 ;
3)对模拟电池系统进行如下操作：1C倍率恒流放电30min，静置30min，1C倍率恒流充电15min，静置30min，1C倍率恒流放电30min，静置30min，1C倍率恒流充电15min，静置30min。记录硬件测试平台上报的模拟电池系统当前SOC值，记为SOC1；3) Perform the following operations on the simulated battery system: 1C rate constant current discharge for 30min, stand for 30min, 1C rate constant current charge for 15min, stand for 30min, 1C rate constant current discharge for 30min, stand for 30min, 1C rate constant current charge for 15min, Let stand for 30 minutes. Record the current SOC value of the simulated battery system reported by the hardware test platform, denoted as SOC 1 ;
4)记录BMS当前上报SOC值，记为SOCc1；4) record the SOC value currently reported by the BMS, denoted as SOC c1 ;
5)认为该BMS的SOC估算精度为两次测量精度的均值，如下式所示。5) It is considered that the SOC estimation accuracy of the BMS is the mean value of the two measurement accuracy, as shown in the following formula.
(|SOCc0-SOC0|/SOC0+|SOCc1-SOC1|/SOC1)/2×100％(|SOC c0 -SOC 0 |/SOC 0 +|SOC c1 -SOC 1 |/SOC 1 )/2×100%
由此对BMS的SOC估算精度进行评估。From this, the SOC estimation accuracy of the BMS is evaluated.
实施例2Example 2
本实施例现以测试电池管理系统SOC估算精度为例，对电池管理系统的相关功能进行测试验证，其中被测电池为WTM32650，具体参数如下。In this embodiment, the SOC estimation accuracy of the battery management system is tested as an example to test and verify the relevant functions of the battery management system. The battery under test is a WTM32650, and the specific parameters are as follows.
表1被测电池具体参数Table 1 Specific parameters of the battery under test
具体测试步骤如下：The specific test steps are as follows:
1)通过硬件测试平台设定模拟电池系统的当前SOC值为100％，记为SOC0；1) Set the current SOC value of the simulated battery system to 100% through the hardware test platform, denoted as SOC 0 ;
2)记录BMS当前上报的SOC值为98.6％，记为SOCc0；2) record the SOC value currently reported by the BMS as 98.6%, denoted as SOC c0 ;
3)对模拟电池系统进行如下操作：恒流5A放电30min，静置30min，恒流5A充电15min，静置30min，恒流5A放电30min，静置30min，恒流5A充电15min，静置30min。记录硬件测试平台上报的模拟电池系统当前SOC值为49.8％，记为SOC1；3) Perform the following operations on the simulated battery system: discharge with constant current 5A for 30 minutes, stand for 30 minutes, charge with constant current 5A for 15 minutes, stand for 30 minutes, discharge with constant current 5A for 30 minutes, leave for 30 minutes, charge with constant current 5A for 15 minutes, and leave for 30 minutes. Record the current SOC value of the simulated battery system reported by the hardware test platform as 49.8%, denoted as SOC 1 ;
4)记录BMS当前上报SOC值为47.3％，记为SOCc1；4) record the SOC value currently reported by the BMS as 47.3%, denoted as SOC c1 ;
5)认为该BMS的SOC估算精度为两次测量精度的均值，如下式所示。5) It is considered that the SOC estimation accuracy of the BMS is the mean value of the two measurement accuracy, as shown in the following formula.
(|SOCc0-SOC0|/SOC0+|SOCc1-SOC1|/SOC1)/2×100％(|SOC c0 -SOC 0 |/SOC 0 +|SOC c1 -SOC 1 |/SOC 1 )/2×100%
计算得到SOC估算精度3.21％，为由此对BMS的SOC估算精度进行评估。The SOC estimation accuracy is calculated to be 3.21%, which is used to evaluate the SOC estimation accuracy of the BMS.
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