CN115332655A - Method and system for optimizing SOC (system on chip) of outdoor power supply - Google Patents
Method and system for optimizing SOC (system on chip) of outdoor power supplyDownload PDFInfo
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Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及电池应用技术领域，特别涉及一种户外电源SOC的优化方法与系统。The invention relates to the field of battery application technology, in particular to a method and system for optimizing the SOC of an outdoor power supply.
背景技术Background technique
随着社会的发展，人们的生活水平得到显著的提高，越来越多的人自备有户外电源，用于旅行时手机充电，笔记本充电，照明及烧烤等等，但是在方便的同时，也产生新的技术问题。由于户口电源频率的用的很少，甚至几个月才用到一次而且由于到，而且出于降本的考虑一般情况下采用磷酸铁锂的电芯，因此电芯的自放电将对SOC的估算带来非常大的挑战。With the development of society, people's living standards have been significantly improved, and more and more people have their own outdoor power sources for mobile phone charging, notebook charging, lighting and barbecue, etc. when traveling, but at the same time it is convenient, it is also New technical problems arise. Since the frequency of household power supply is seldom used, even once every few months, and due to cost reduction considerations, lithium iron phosphate cells are generally used, so the self-discharge of the cells will have a negative impact on the SOC. Estimation poses a very big challenge.
现有户外电源的SOC，是基于电流的实时积分计算，外加满电修正和低端电压修正，具有如下缺陷：The SOC of the existing outdoor power supply is based on the real-time integral calculation of current, plus full power correction and low-end voltage correction, which has the following defects:
(1)户外电源不用时，没有电流，而且BMS没有上电工作，自放电无法被纳入SOC的计算，短期不用，对SOC影响不大，长期不用将对SOC产生非常大的影响；(1) When the outdoor power supply is not in use, there is no current, and the BMS is not powered on, so self-discharge cannot be included in the calculation of SOC. If it is not used for a short period of time, it will have little impact on the SOC, and if it is not used for a long time, it will have a very large impact on the SOC;
(2)由于用的磷酸铁锂的电芯，在平台期无法用OCV修正SOC；(2) Due to the lithium iron phosphate battery used, the SOC cannot be corrected by OCV during the plateau period;
(3)当SOC误差较大时，将对客户的使用产生严重影响。例如，真实的SOC只有20％，而反馈给客户的值是50％，客户认为电量充足而未充电时，极可能在使用过程中出现电量不足，严重影响客户的使用。(3) When the SOC error is large, it will have a serious impact on the use of customers. For example, the real SOC is only 20%, but the value fed back to the customer is 50%. When the customer thinks that the battery is sufficient but not charged, it is very likely that the battery will be insufficient during use, which will seriously affect the customer's use.
因此，如何提高户外电源的SOC估算的准确度，成为一个亟待解决的问题。Therefore, how to improve the accuracy of the SOC estimation of the outdoor power supply has become an urgent problem to be solved.
发明内容Contents of the invention
本发明所要解决的技术问题是：提供一种户外电源SOC的优化方法与系统，能够有效提高户外电源的SOC估算的准确度。The technical problem to be solved by the present invention is to provide a method and system for optimizing the SOC of an outdoor power supply, which can effectively improve the accuracy of SOC estimation of the outdoor power supply.
为了解决上述技术问题，本发明采用的技术方案为：In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
一种户外电源SOC的优化方法，包括步骤：A method for optimizing the SOC of an outdoor power supply, comprising the steps of:
S1、接收BMS下电请求，记录当前的下电SOC以及RTC时钟当前的下电时间；S1. Receive the BMS power-off request, record the current power-off SOC and the current power-off time of the RTC clock;
S2、根据所述RTC时钟和预设时间间隔定时唤醒BMS；S2. Timingly wake up the BMS according to the RTC clock and a preset time interval;
S3、判断电芯单体电压是否处于平台区，若是，则根据预设的标定量对SOC进行修正，否则通过OCV表对SOC进行修正；S3. Determine whether the voltage of the battery cell is in the plateau area, if so, correct the SOC according to the preset calibration value, otherwise correct the SOC through the OCV table;
所述标定量为预先实测取得的电池在预设时长内自放电的平均量；The calibration amount is the average amount of self-discharge of the battery obtained in advance in the preset time period;
S4、完成SOC修正后，发起BMS下电请求。S4. After the SOC correction is completed, a BMS power-off request is initiated.
为了解决上述技术问题，本发明采用的另一种技术方案为：In order to solve the above-mentioned technical problems, another kind of technical scheme that the present invention adopts is:
一种户外电源SOC的优化系统，其特征在于，包括电池包、BMS、RTC时钟、纽扣电池、定时唤醒电路和后台，所述纽扣电池用于对RTC时钟供电，所述电池包、RTC时钟、定时唤醒电路和后台均与BMS连接，并实现以下步骤：A kind of optimization system of outdoor power supply SOC, it is characterized in that, comprise battery pack, BMS, RTC clock, button battery, timing wake-up circuit and background, described button battery is used for supplying power to RTC clock, described battery pack, RTC clock, Both the timing wake-up circuit and the background are connected to the BMS, and the following steps are implemented:
S1、接收BMS下电请求，记录当前的下电SOC以及RTC时钟当前的下电时间；S1. Receive the BMS power-off request, record the current power-off SOC and the current power-off time of the RTC clock;
S2、根据所述RTC时钟和预设时间间隔定时唤醒BMS；S2. Timingly wake up the BMS according to the RTC clock and a preset time interval;
S3、判断电芯单体电压是否处于平台区，若是，则根据预设的标定量对SOC进行修正，否则通过OCV表对SOC进行修正；S3. Determine whether the voltage of the battery cell is in the plateau area, if so, correct the SOC according to the preset calibration value, otherwise correct the SOC through the OCV table;
所述标定量为预先实测取得的电池在预设时长内自放电的平均量；The calibration amount is the average amount of self-discharge of the battery obtained in advance in the preset time period;
S4、完成SOC修正后，发起BMS下电请求。S4. After the SOC correction is completed, a BMS power-off request is initiated.
本发明的有益效果在于：本发明的一种户外电源SOC的优化方法与系统，在用户关机BMS下电后，能够定时对电池SOC进行修正，即使电池的电芯单体电压处于平台期，也能够通过下电的时长对其进行修正，从而保证在用户下次启动时，能够得到更加准确的电池SOC数据，有效提高户外电源的SOC估算的准确度。The beneficial effect of the present invention is that: the method and system for optimizing the SOC of an outdoor power supply according to the present invention can regularly correct the battery SOC after the user shuts down the BMS and powers off the battery, even if the battery cell voltage is in the plateau period, It can be corrected by the duration of power-off, so as to ensure that when the user starts up next time, more accurate battery SOC data can be obtained, and the accuracy of SOC estimation of outdoor power supply can be effectively improved.
附图说明Description of drawings
图1为本发明实施例的一种户外电源SOC的优化方法的流程图；Fig. 1 is a flowchart of a method for optimizing the SOC of an outdoor power supply according to an embodiment of the present invention;
图2为本发明实施例的一种户外电源SOC的优化系统的结构示意图；2 is a schematic structural diagram of an optimization system for an outdoor power supply SOC according to an embodiment of the present invention;
图3为本发明实施例的一种户外电源SOC的优化方法的具体流程图。FIG. 3 is a specific flowchart of a method for optimizing the SOC of an outdoor power supply according to an embodiment of the present invention.
具体实施方式Detailed ways
为详细说明本发明的技术内容、所实现目的及效果，以下结合实施方式并配合附图予以说明。In order to describe the technical content, achieved goals and effects of the present invention in detail, the following descriptions will be made in conjunction with the embodiments and accompanying drawings.
相关名词说明：Description of related terms:
电池包：本发明的被控对象，包含电芯、温度传感器、电流传感器、继电器及线束等等；Battery pack: the controlled object of the present invention, including batteries, temperature sensors, current sensors, relays and wiring harnesses, etc.;
BMS：Battery Management System，电池管理系统，其信号采集包含(单体电压、总压、电流、单体温度)，根据采集到信号估算电芯相关状态(SOC、SOP、SOH)及执行充放电的动作，并通过CAN或者RS485通讯的方式将采集到的温度、电流、电压及计算出来的相关参数传输到EMS系统；BMS: Battery Management System, battery management system, its signal collection includes (cell voltage, total voltage, current, cell temperature), estimates the battery-related state (SOC, SOP, SOH) and performs charging and discharging according to the collected signals Action, and transmit the collected temperature, current, voltage and calculated related parameters to the EMS system through CAN or RS485 communication;
主控板：控制器不局限该命名，接收各控制器发过来的数据，控制和保护整个储能系统，控制BMS的上下电；Main control board: The controller is not limited to the name, receives the data sent by each controller, controls and protects the entire energy storage system, and controls the power on and off of the BMS;
RTC时钟：类似平日用的手表，持续不间断在计时；RTC clock: similar to a watch used on weekdays, continuously counting time;
定时唤醒：在BMS下电休眠时，可以通过定时唤醒电路唤醒BMS，进行SOC的修正；Timing wake-up: When the BMS is powered off and sleeps, the BMS can be woken up through the timing wake-up circuit to correct the SOC;
纽扣电池：在BMS的下电休眠时，能够给RTC电路供电，确保时钟可以一直在计时；Button battery: When the BMS is powered off and dormant, it can supply power to the RTC circuit to ensure that the clock can keep counting;
后台：当BMS检测到单体欠压时，把告警信息反馈给后台，警示客户及时补电；Background: When the BMS detects the undervoltage of the monomer, it will feed back the alarm information to the background to warn customers to replenish power in time;
SOC：State Of Charge，荷电状态；SOC: State Of Charge, state of charge;
SOP：State Of Power，充放电功率状态；SOP: State Of Power, charge and discharge power state;
SOH：State of Health，电池健康状态。SOH: State of Health, battery health status.
请参照图1以及图3，一种户外电源SOC的优化方法，包括步骤：Please refer to Figure 1 and Figure 3, a method for optimizing the SOC of an outdoor power supply, including steps:
S1、接收BMS下电请求，记录当前的下电SOC以及RTC时钟当前的下电时间；S1. Receive the BMS power-off request, record the current power-off SOC and the current power-off time of the RTC clock;
S2、根据所述RTC时钟和预设时间间隔定时唤醒BMS；S2. Timingly wake up the BMS according to the RTC clock and a preset time interval;
S3、判断电芯单体电压是否处于平台区，若是，则根据预设的标定量对SOC进行修正，否则通过OCV表对SOC进行修正；S3. Determine whether the voltage of the battery cell is in the plateau area, if so, correct the SOC according to the preset calibration value, otherwise correct the SOC through the OCV table;
所述标定量为预先实测取得的电池在预设时长内自放电的平均量；The calibration amount is the average amount of self-discharge of the battery obtained in advance in the preset time period;
S4、完成SOC修正后，发起BMS下电请求。S4. After the SOC correction is completed, a BMS power-off request is initiated.
从上述描述可知，本发明的有益效果在于：本发明的一种户外电源SOC的优化方法与系统，在用户关机BMS下电后，能够定时对电池SOC进行修正，即使电池的电芯单体电压处于平台期，也能够通过下电的时长对其进行修正，从而保证在用户下次启动时，能够得到更加准确的电池SOC数据，有效提高户外电源的SOC估算的准确度。It can be seen from the above description that the beneficial effect of the present invention lies in that the method and system for optimizing the SOC of an outdoor power supply according to the present invention can regularly correct the battery SOC after the user shuts down the BMS and powers off the battery, even if the battery cell voltage In the platform stage, it can also be corrected by the length of the power-off time, so as to ensure that the user can get more accurate battery SOC data when the user starts the next time, and effectively improve the accuracy of the SOC estimation of the outdoor power supply.
进一步地，所述步骤S2和S3之间还包括步骤：Further, steps S2 and S3 also include:
S21、判断电芯单体电压是否出现欠压，若是则发送告警信息提醒补电，否则进入下一步骤。S21. Determine whether the battery cell voltage is under-voltage, and if so, send an alarm message to remind the power supply, otherwise enter the next step.
由上述描述可知，若检测到电芯单体电压出现欠压的情况，能够梯形客户进行补电，从而尽量避免电芯过放的发生。From the above description, it can be known that if an undervoltage of the battery cell voltage is detected, the user can recharge the power, so as to avoid the occurrence of the battery cell over-discharge as much as possible.
进一步地，所述根据预设的标定量对SOC进行修正具体为：Further, the correction of the SOC according to the preset calibration amount is specifically:
根据预设时间间隔t和预设的标定量△SOC计算电芯的自放电量S：Calculate the self-discharge capacity S of the cell according to the preset time interval t and the preset calibration value △SOC:
S＝△SOC*t；S=△SOC*t;
根据下电时电池的下电SOC和下电时间内电芯的自放电量S，计算修正后的电池SOC。Calculate the corrected battery SOC according to the power-off SOC of the battery at power-off and the self-discharge capacity S of the battery cell within the power-off time.
由上述描述可知，根据预设的标定量和时间间隔能够估算出在预设的时间间隔内，电池电芯的自放电量，从而估算出电芯当前的SOC。It can be seen from the above description that the self-discharge capacity of the battery cell within the preset time interval can be estimated according to the preset calibration amount and time interval, thereby estimating the current SOC of the battery cell.
进一步地，所述户外电源为磷酸铁锂电池，所述平台区对应的电压范围为3.25V-3.35V，所述平台区对应的SOC为5％-95％。Further, the outdoor power supply is a lithium iron phosphate battery, the voltage range corresponding to the platform area is 3.25V-3.35V, and the SOC corresponding to the platform area is 5%-95%.
由上述描述可知，户外电源为磷酸铁锂电池作为本发明的一种实施例，对于磷酸铁锂电芯，平台区SOC大约为5％～95％，从单体电压的角度，则平台区的所对应的电压范围为3.25V-3.35V，二者基本对应。It can be known from the above description that the outdoor power supply is a lithium iron phosphate battery as an embodiment of the present invention. For the lithium iron phosphate battery, the SOC of the platform area is about 5% to 95%. The corresponding voltage range is 3.25V-3.35V, and the two basically correspond.
进一步地，预设的标定量ΔSOC的计算方法包括：Further, the calculation method of the preset calibration amount ΔSOC includes:
静置户外电源预设静置时长，计算预设静置时长内被消耗的总电量，预设的标定量△SOC等于被消耗的总电量除以预设静置时长。The outdoor power supply is set aside for a preset period of time, and the total power consumed within the preset period of time is calculated. The preset calibration value △SOC is equal to the total power consumed divided by the preset period of time.
由上述描述可知，通过上述方式，能够有效测得所需的标定量。It can be seen from the above description that the required calibration amount can be effectively measured through the above method.
进一步地，所述通过OCV表对SOC进行修正具体为：Further, the modification of the SOC through the OCV table is specifically:
获取电芯的当前温度，根据电芯的当前温度和所述电芯单体电压，在SOC表中进行匹配，得到修正后的电池的SOC。Obtain the current temperature of the battery cell, and perform matching in the SOC table according to the current temperature of the battery cell and the voltage of the battery cell to obtain the corrected SOC of the battery.
由上述描述可知，通过温度和电芯单体电压，即可从OCV表中得到对应的电池SOC数据作为修正值。It can be seen from the above description that the corresponding battery SOC data can be obtained from the OCV table as a correction value through the temperature and the voltage of the battery cell.
进一步地，所述步骤S4具体为：Further, the step S4 is specifically:
完成SOC修正后，判断BMS唤醒时间是否达到预设时长，若是则发起BMS下电请求。After the SOC correction is completed, it is judged whether the BMS wake-up time reaches the preset duration, and if so, a BMS power-off request is initiated.
由上述描述可知，对BMS每次唤醒的时长作出限制，以减少BMS的功耗。It can be known from the above description that the duration of each wake-up of the BMS is limited to reduce the power consumption of the BMS.
进一步地，所述步骤S3替换为：Further, the step S3 is replaced by:
S3、通过OCV表对SOC进行修正。S3. Correct the SOC through the OCV table.
由上述描述可知，对于部分不需要考虑平台区的电池类型，如三元锂电池，则直接可以铜鼓OCV表对SOC进行修正。It can be seen from the above description that for some battery types that do not need to consider the platform area, such as ternary lithium batteries, the SOC can be directly corrected by the copper drum OCV table.
进一步地，所述步骤S3替换为：Further, the step S3 is replaced by:
S3、识别所述户外电源类型，若所述户外电源为磷酸铁锂电池，则判断电芯单体电压是否处于平台区，若是，则根据预设的标定量对SOC进行修正，否则通过OCV表对SOC进行修正；S3. Identify the type of outdoor power supply. If the outdoor power supply is a lithium iron phosphate battery, judge whether the voltage of the battery cell is in the platform area. Modify the SOC;
若所述户外电源为三元锂电池，则直接通过OCV表对SOC进行修正。If the outdoor power supply is a ternary lithium battery, the SOC is directly corrected through the OCV table.
由上述描述可知，通过识别电池类型，能够对应选择合适的修正策略，从而更加有效、精准地对电池SOC进行修正。It can be seen from the above description that by identifying the battery type, an appropriate correction strategy can be selected correspondingly, so that the battery SOC can be corrected more effectively and accurately.
请参照图2，一种户外电源SOC的优化系统，其特征在于，包括电池包、BMS、RTC时钟、纽扣电池、定时唤醒电路和后台，所述纽扣电池用于对RTC时钟供电，所述电池包、RTC时钟、定时唤醒电路和后台均与BMS连接，以实现以所述标定量为预先实测取得的电池在预设时长内自放电的平均量上一种户外电源SOC的优化方法中的步骤。Please refer to Fig. 2, a kind of optimization system of outdoor power supply SOC is characterized in that, comprises battery pack, BMS, RTC clock, button battery, timing wake-up circuit and background, and described button battery is used for supplying power to RTC clock, and described battery The bag, the RTC clock, the timing wake-up circuit and the background are all connected to the BMS, so as to realize the steps in an optimization method for the SOC of an outdoor power supply based on the average amount of self-discharge of the battery obtained in pre-measurement within a preset period of time. .
从上述描述可知，本发明的有益效果在于：本发明的一种户外电源SOC的优化方法与系统，在用户关机BMS下电后，能够定时对电池SOC进行修正，即使电池的电芯单体电压处于平台期，也能够通过下电的时长对其进行修正，从而保证在用户下次启动时，能够得到更加准确的电池SOC数据，有效提高户外电源的SOC估算的准确度。It can be seen from the above description that the beneficial effect of the present invention lies in that the method and system for optimizing the SOC of an outdoor power supply according to the present invention can regularly correct the battery SOC after the user shuts down the BMS and powers off the battery, even if the battery cell voltage In the platform stage, it can also be corrected by the length of the power-off time, so as to ensure that the user can get more accurate battery SOC data when the user starts the next time, and effectively improve the accuracy of the SOC estimation of the outdoor power supply.
本发明的一种户外电源SOC的优化方法与系统，适用于户外电源的SOC优化修正。A method and system for optimizing the SOC of an outdoor power supply according to the present invention are suitable for optimizing and correcting the SOC of an outdoor power supply.
请参照图1和图3，本发明的实施例一为：Please refer to Fig. 1 and Fig. 3, embodiment one of the present invention is:
一种户外电源SOC的优化方法，包括步骤：A method for optimizing the SOC of an outdoor power supply, comprising the steps of:
S1、接收BMS下电请求，记录当前的下电SOC以及RTC时钟当前的下电时间。S1. Receive the BMS power-off request, and record the current power-off SOC and the current power-off time of the RTC clock.
本实施例的一种户外电源SOC的优化方法，适用于户外电源为存在平台区影响的电池类型，如磷酸铁锂电池。本实施例中以磷酸铁锂电池为例。The method for optimizing the SOC of an outdoor power supply in this embodiment is applicable to a battery type affected by a platform area for the outdoor power supply, such as a lithium iron phosphate battery. In this embodiment, a lithium iron phosphate battery is taken as an example.
本实施例中，客户关机时，主控板将请求BMS下电，BMS响应主控板的下电请求，并记录此时电池的SOC和RTC时钟的时间。In this embodiment, when the client shuts down, the main control board will request the BMS to power off, and the BMS will respond to the power-off request of the main control board, and record the SOC of the battery and the time of the RTC clock at this time.
S2、根据所述RTC时钟和预设时间间隔定时唤醒BMS。S2. Timingly wake up the BMS according to the RTC clock and a preset time interval.
本实施例中，由定时电路在设定时间下唤醒BMS。In this embodiment, the timing circuit wakes up the BMS at a set time.
所述步骤S2和S3之间还包括步骤：Also include steps between the steps S2 and S3:
S21、判断电芯单体电压是否出现欠压，若是则发送告警信息提醒补电，否则进入下一步骤。S21. Determine whether the battery cell voltage is under-voltage, and if so, send an alarm message to remind the power supply, otherwise enter the next step.
本实施例中，BMS在唤醒后，首先判断电芯单体电压是否欠压，当发现单体欠压时，将发送相关的信息给后台，提醒客户进行补电，防止电芯过放发生。In this embodiment, after the BMS wakes up, it first judges whether the voltage of the cell is undervoltage. When it finds that the cell is undervoltage, it will send relevant information to the background to remind the customer to recharge the battery to prevent the battery from being over-discharged.
S3、判断电芯单体电压是否处于平台区，若是，则根据预设的标定量对SOC进行修正，否则通过OCV表对SOC进行修正；S3. Determine whether the voltage of the battery cell is in the plateau area, if so, correct the SOC according to the preset calibration value, otherwise correct the SOC through the OCV table;
所述标定量为预先实测取得的电池在预设时长内自放电的平均量。The calibration amount is the average amount of self-discharge of the battery within a preset time period obtained through actual measurement in advance.
本实施例中，所述标定量为预先实测取得的电池每天自放电的平均量。In this embodiment, the calibration amount is the average amount of self-discharge of the battery per day measured in advance.
本实施例中，电芯单体电压没有欠压的情况下，将判断电芯电压是否处于平台区，平台区具体是指SOC变化而单体电压基本不变的那段区域。对于磷酸铁锂电芯，从单体电压的角度，平台区对应的电压一般范围为(3.25V-3.35V)。由于磷酸铁锂电芯的平台区无法做OCV修正，因此根据时间差来对SOC进行修正，在电芯电压不处于平台区时，则可以直接通过OCV表来修正。In this embodiment, when the cell voltage is not undervoltage, it will be judged whether the cell voltage is in the plateau area, and the plateau area specifically refers to the area where the SOC changes but the cell voltage basically remains unchanged. For lithium iron phosphate batteries, from the perspective of monomer voltage, the voltage corresponding to the platform area generally ranges from (3.25V-3.35V). Since the platform area of the lithium iron phosphate battery cannot be corrected for OCV, the SOC is corrected according to the time difference. When the cell voltage is not in the platform area, it can be corrected directly through the OCV meter.
所述根据预设的标定量对SOC进行修正具体为：Said correcting the SOC according to the preset calibration quantity is specifically as follows:
根据预设时间间隔t和预设的标定量△SOC计算电芯的自放电量S：Calculate the self-discharge capacity S of the cell according to the preset time interval t and the preset calibration value △SOC:
S＝△SOC*t；S=△SOC*t;
根据下电时电池的下电SOC和下电时间内电芯的自放电量S，计算差值得到修正后的电池SOC。According to the power-off SOC of the battery at power-off and the self-discharge capacity S of the battery cell within the power-off time, the difference is calculated to obtain the corrected battery SOC.
本实施例中，修正的SOC＝下电SOC-自放电量/额定容量。In this embodiment, corrected SOC=power-off SOC−self-discharge capacity/rated capacity.
本实施例中，以持续10天未进行修正为例，在无法进行OCV修正时，则根据标定量计算电芯的自放电约为10*ΔSOC(标定量)。标定量可以通过实测取得大约值，一般情况一个月的自放电大约为2％，ΔSOC约为2％/30。In this embodiment, taking 10 days without correction as an example, when the OCV correction cannot be performed, the self-discharge of the cell is calculated based on the calibration value to be about 10*ΔSOC (standard value). The calibration value can be obtained by actual measurement. In general, the self-discharge for one month is about 2%, and ΔSOC is about 2%/30.
标定量的实测示例步骤如下：The steps of the actual measurement example of the calibration quantity are as follows:
首先充满电，此时的SOC是100；First fully charge, the SOC at this time is 100;
再静置1个月，由于磷酸铁锂不好估算出此时的SOC，可以再充满，通过充电设备我们可以知悉被充进了多少电，这些电刚好就是这一个月被消耗的电量Q1，然后Q1/30就可以算出每天被消耗多少电。Let it stand for another month. Since lithium iron phosphate is difficult to estimate the SOC at this time, it can be recharged. We can know how much electricity has been charged through the charging device. This electricity is exactly the amount of electricity consumed in this month Q1. Then Q1/30 can calculate how much electricity is consumed every day.
最后通过Q1/30乘以累计静置时间，可以用于进一步估算SOC的值，防止SOC一直不修正，其实已经没多少电的情况。其中累计静置时间，是通过定时唤醒可以估算出，即预设时间间隔。Finally, by multiplying Q1/30 by the accumulated resting time, it can be used to further estimate the value of the SOC, preventing the situation where the SOC has not been corrected and there is actually not much power left. The accumulative resting time can be estimated by timing wake-up, that is, the preset time interval.
所述通过OCV表对SOC进行修正具体为：The modification of the SOC through the OCV table is specifically as follows:
获取电芯的当前温度，根据电芯的当前温度和所述电芯单体电压，在SOC表中进行匹配，得到修正后的电池的SOC。Obtain the current temperature of the battery cell, and perform matching in the SOC table according to the current temperature of the battery cell and the voltage of the battery cell to obtain the corrected SOC of the battery.
本实施例中，OCV表示例如下表1所示：In this embodiment, the OCV representation is as shown in Table 1 below:
表1Table 1
注：上表(OCV表)中第一行代表的是温度轴，第一列代表的是SOC轴。Note: The first row in the above table (OCV table) represents the temperature axis, and the first column represents the SOC axis.
OCV表格中的单体电压为静置下的电压，可以理解为下电30分钟后采集的电压，此时没有受到电流的干扰，因为电芯的特性使得放电时电芯电压偏低，充电时电芯电压偏高。The cell voltage in the OCV table is the voltage at rest, which can be understood as the voltage collected 30 minutes after power off. At this time, there is no interference from the current, because the characteristics of the battery cell make the cell voltage low when discharging, and the battery voltage is low when charging. The battery voltage is too high.
从上表中可以发现，磷酸铁锂的OCV表，在SOC为5％～95％的区间(对应于上述所述的平台区)，单体电压差异非常的小，因此无法通过单体电压来修正SOC。当电压落在平台区外时，可以通过单体电压查得此时的SOC。From the above table, it can be found that in the OCV table of lithium iron phosphate, in the SOC range of 5% to 95% (corresponding to the above-mentioned platform area), the difference in cell voltage is very small, so it cannot be determined by the cell voltage. Fix SOC. When the voltage falls outside the plateau area, the SOC at this time can be checked through the cell voltage.
S4、完成SOC修正后，发起BMS下电请求。S4. After the SOC correction is completed, a BMS power-off request is initiated.
所述步骤S4具体为：The step S4 is specifically:
完成SOC修正后，判断BMS唤醒时间是否达到预设时长，若是则发起BMS下电请求。After the SOC correction is completed, it is judged whether the BMS wake-up time reaches the preset duration, and if so, a BMS power-off request is initiated.
本实施例中，每次定时唤醒，BMS工作的时间约为1分钟，之后将继续进入休眠，减小BMS的功耗。其中，定时唤醒时间可以例如可以定时12小时，太短了容易频繁唤醒耗电量较大。In this embodiment, the BMS works for about 1 minute each time it wakes up at regular intervals, and then continues to sleep to reduce the power consumption of the BMS. Wherein, the scheduled wake-up time can be, for example, 12 hours, and if it is too short, frequent wake-ups tend to consume a lot of power.
本发明的实施例二为：Embodiment two of the present invention is:
一种户外电源SOC的优化方法，与实施例一的区别在于，所述步骤S3替换为：A method for optimizing the SOC of an outdoor power supply, the difference from Embodiment 1 is that the step S3 is replaced by:
S3、通过OCV表对SOC进行修正。S3. Correct the SOC through the OCV table.
本实施例的一种户外电源SOC的优化方法，适用于不存在平台区考虑，任何阶段均可通过OCV表进行修正的电池类型，如三元锂电池。本实施例中以三元锂电池为例，三元锂电池的OCV表如下表2示例所示：The method for optimizing the SOC of an outdoor power supply in this embodiment is applicable to a battery type that does not have a platform area and can be corrected through an OCV table at any stage, such as a ternary lithium battery. In this embodiment, a ternary lithium battery is taken as an example, and the OCV table of the ternary lithium battery is shown in the example in Table 2 below:
表2Table 2
通过表2可以发现，三元锂电池在不同的SOC，单体电压差别非常的明显，因此在整个SOC区间都可以通过单体电压查表计算出此时的SOC。所以，对于三元锂电池的SOC修正，则不需要判断是否处于平台区，可以直接通过OCV表进行修正。It can be found from Table 2 that the cell voltage of the ternary lithium battery is very different at different SOCs, so the SOC at this time can be calculated by looking up the cell voltage in the entire SOC range. Therefore, for the SOC correction of the ternary lithium battery, there is no need to judge whether it is in the platform area, and it can be corrected directly through the OCV table.
本发明的实施例三为：Embodiment three of the present invention is:
一种户外电源SOC的优化方法，与实施例一的区别在于，所述步骤S3替换为：A method for optimizing the SOC of an outdoor power supply, the difference from Embodiment 1 is that the step S3 is replaced by:
S3、识别所述户外电源类型，若所述户外电源为磷酸铁锂电池，则判断电芯单体电压是否处于平台区，若是，则根据预设的标定量对SOC进行修正，否则通过OCV表对SOC进行修正；S3. Identify the type of outdoor power supply. If the outdoor power supply is a lithium iron phosphate battery, judge whether the voltage of the battery cell is in the platform area. Modify the SOC;
若所述户外电源为三元锂电池，则直接通过OCV表对SOC进行修正。If the outdoor power supply is a ternary lithium battery, the SOC is directly corrected through the OCV table.
本实施例中，通过对户外电源的类型进行识别，判断户外电源为磷酸铁锂电池还是三元锂电池，从而能够选择不同的修正方法。In this embodiment, by identifying the type of the outdoor power supply, it is determined whether the outdoor power supply is a lithium iron phosphate battery or a ternary lithium battery, so that different correction methods can be selected.
请参照图2，本发明的实施例四为：Please refer to Fig. 2, embodiment four of the present invention is:
一种户外电源SOC的优化系统，包括电池包、BMS、RTC时钟、纽扣电池、定时唤醒电路和后台，所述纽扣电池用于对RTC时钟供电，所述电池包、RTC时钟、定时唤醒电路和后台均与BMS连接，以实现以上实施例一、二或三中的一种户外电源SOC的优化方法中的步骤。An optimization system of an outdoor power supply SOC, including a battery pack, BMS, RTC clock, button battery, timing wake-up circuit and background, the button battery is used to supply power to the RTC clock, the battery pack, RTC clock, timing wake-up circuit and The background is connected with the BMS, so as to implement the steps in the method for optimizing the SOC of an outdoor power supply in the above embodiment 1, 2 or 3.
综上所述，本发明提供的一种户外电源SOC的优化方法与系统，在用户关机BMS下电后，能够定时对电池SOC进行修正，即使电池的电芯单体电压处于平台期，也能够通过下电的时长对其进行修正，从而保证在用户下次启动时，能够得到更加准确的电池SOC数据，有效提高户外电源的SOC估算的准确度。To sum up, the method and system for optimizing the SOC of an outdoor power supply provided by the present invention can regularly correct the SOC of the battery after the user shuts down the BMS and powers off the battery. It is corrected by the length of power-off, so as to ensure that when the user starts the next time, more accurate battery SOC data can be obtained, and the accuracy of SOC estimation of the outdoor power supply can be effectively improved.
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等同变换，或直接或间接运用在相关的技术领域，均同理包括在本发明的专利保护范围内。The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent transformations made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in related technical fields, are all included in the same principle. Within the scope of patent protection of the present invention.
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