技术领域Technical field
本发明涉及储能电池领域，特别是涉及一种用于提升储能电池簇功率回路效率的电路连接方法。The present invention relates to the field of energy storage batteries, and in particular, to a circuit connection method for improving the efficiency of the power loop of an energy storage battery cluster.
背景技术Background technique
电池簇是由电池单体采用串联、并联或串并联连接方式，且与储能变流器及附属设施连接后实现独立运行的电池组合体，还宜包括电池管理系统、监测和保护电路、电气和通讯接口等部件；A battery cluster is a battery assembly composed of battery cells connected in series, parallel or series-parallel, and connected to an energy storage converter and ancillary facilities to achieve independent operation. It should also include a battery management system, monitoring and protection circuits, electrical and communication interfaces and other components;
现有电池簇由电池模组串联后接入簇管理高压箱进行控制，其电压可串联至几百伏-1500伏，甚至更高，因此高压箱内部元器件的耐压必须高于电池簇的总电压，在设计高压箱时，选择元器件的耐压尤为重要，器件耐压等级成为电气元器件的选型制约，存在选型困难、可用选型少而且价格高等问题；Existing battery clusters are controlled by battery modules connected in series and then connected to the cluster management high-voltage box. The voltage can be connected in series to hundreds of volts to 1500 volts or even higher. Therefore, the withstand voltage of the components inside the high-voltage box must be higher than that of the battery cluster. Total voltage. When designing a high-voltage box, it is particularly important to select the withstand voltage of components. The device voltage rating becomes a constraint on the selection of electrical components. There are problems such as difficulty in selection, few available options, and high prices;
并且，高压箱的电气元器件增多导致箱内连接点增多，器件增多，导致高压箱设计复杂、控制繁琐、故障点增加、效率降低（每个连接点的损耗远远大于导线或铜排的线损）；Moreover, the increase in electrical components in the high-voltage box has led to an increase in connection points and devices in the box, resulting in complex design of the high-voltage box, cumbersome control, increased fault points, and reduced efficiency (the loss of each connection point is much greater than that of wires or copper busbars). damage);
此外，在工商业储能系统中，由于系统只配置一簇电池系统，高压箱的设计造成系统成本高、占用空的位置较大、能量密度低等问题；为此，我们提出一种用于提升储能电池簇功率回路效率的电路连接方法。In addition, in industrial and commercial energy storage systems, since the system is only equipped with a cluster of battery systems, the design of the high-voltage box causes problems such as high system cost, large occupied space, and low energy density. To this end, we propose a method for improving Circuit connection method for energy storage battery cluster power loop efficiency.
发明内容Contents of the invention
本发明的目的在于提供一种用于提升储能电池簇功率回路效率的电路连接方法，通过减少接触器、预充回路以及高压箱，可有效解决背景技术中提出的问题。The purpose of the present invention is to provide a circuit connection method for improving the efficiency of the power loop of an energy storage battery cluster, which can effectively solve the problems raised in the background technology by reducing contactors, precharge loops and high-voltage boxes.
本发明是通过以下技术方案实现的：The present invention is achieved through the following technical solutions:
本发明为一种用于提升储能电池簇功率回路效率的电路连接方法，包括如下步骤：The invention is a circuit connection method for improving the efficiency of the power loop of an energy storage battery cluster, which includes the following steps:
S1：直流电上电时，合上直流侧断路器Q1，电池输出直流电，为系统中的BMS、EMS设备供电，PCS的直流端口具备电池供电；S1: When the DC power is turned on, close the DC side circuit breaker Q1, and the battery outputs DC power to supply power to the BMS and EMS equipment in the system. The DC port of the PCS has battery power supply;
S2：设备点击启动后，PCS的内部预充回路3K、4K合闸，直流电经预充电阻1R、2R限流向PCS内部支撑电容进行充电；S2: After the device clicks to start, the internal precharge circuits 3K and 4K of the PCS are closed, and the DC current is limited to the PCS internal support capacitor through the precharge resistors 1R and 2R for charging;
S3：上述S2中，当PCS内部接触器1K、2K两端电压一致后，合上PCS内部接触器1K、2K，再断开3K、4K完成启动过程，运行DCAC逆变/整流；S3: In the above S2, when the voltages at both ends of the PCS internal contactors 1K and 2K are consistent, close the PCS internal contactors 1K and 2K, then disconnect 3K and 4K to complete the startup process and run the DCAC inverter/rectifier;
S4：直流电下电时，设备点击关机后，停止DCAC逆变/整流，断开PCS内部接触器1K、2K，再断开断路器Q1，从而完成设备断电过程；S4: When the DC power is turned off, after the device is clicked to shut down, the DCAC inverter/rectifier is stopped, the PCS internal contactors 1K and 2K are disconnected, and then the circuit breaker Q1 is disconnected to complete the device power-off process;
S5：设备在正常工作时，当BMS检测到电池系统存在异常状况，经BMS判断要切断电池与逆变系统的连接时，BMS发出故障停机信号至断路器Q1的脱扣线圈，将断路器Q1进行断开脱扣，实现电池与逆变系统的连接断开，保护电池系统；S5: When the equipment is working normally, when the BMS detects an abnormality in the battery system and the BMS determines that the connection between the battery and the inverter system needs to be cut off, the BMS sends a fault shutdown signal to the trip coil of the circuit breaker Q1 and switches the circuit breaker Q1 Perform disconnection tripping to disconnect the battery from the inverter system and protect the battery system;
S6：当电池系统瞬间电流超过限定电流，BMS来不及反应、断路器Q1来不及脱开时，回路中串联的熔断器FU受电流激增而温度升高熔断FU中的导体，实现电池主回路的断开连接。S6: When the instantaneous current of the battery system exceeds the limited current, and the BMS has no time to respond and the circuit breaker Q1 has no time to disengage, the fuse FU connected in series in the circuit is affected by the current surge and the temperature rises and fuses the conductor in the FU, thereby disconnecting the main circuit of the battery. connect.
所述S3和S4中，DCAC逆变/整流即为进行充电/放电过程。In S3 and S4, DCAC inverter/rectification is the charging/discharging process.
所述S5为电池系统普通故障保护过程。The S5 is the normal fault protection process of the battery system.
所述S5中BMS判断要切断电池与逆变系统的连接时，BMS发出故障停机信号至断路器Q1的脱扣线圈，采用DO输出的方式，将断路器Q1进行断开脱扣，实现电池与逆变系统的连接断开。In S5, when the BMS determines that it is necessary to cut off the connection between the battery and the inverter system, the BMS sends a fault shutdown signal to the trip coil of the circuit breaker Q1, and uses the DO output method to disconnect and trip the circuit breaker Q1 to realize the connection between the battery and the inverter system. The connection to the inverter system is disconnected.
所述S6为电池系统遭遇严重故障时保护过程。The S6 is the protection process when the battery system encounters a serious fault.
本发明减少了接触器、预充回路和高压箱，具体地，The present invention reduces contactors, pre-charging circuits and high-voltage boxes. Specifically,
一、在储能系统中，通过利用PCS内部软启回路而减少高压箱内的软启回路；1. In the energy storage system, the soft start loop in the high-voltage box is reduced by utilizing the soft start loop inside the PCS;
二、在储能系统中，通过利用BMS控制、PCS配合来减少或取消高压箱；2. In the energy storage system, reduce or eliminate the high-voltage box by using BMS control and PCS cooperation;
三、在储能系统中，通过上述一、二技术方案实现电池簇接触器的取消，预充的取消来优化、降低成本；3. In the energy storage system, through the above-mentioned technical solutions 1 and 2, the cancellation of battery cluster contactors and the cancellation of pre-charge can be used to optimize and reduce costs;
四、通过上述一、二、三方案提升直流侧效率。4. Improve DC side efficiency through the above one, two and three solutions.
本发明改变了熔断器的安装位置，具体地，The present invention changes the installation position of the fuse, specifically,
一、通过将高压箱熔断器外移至电池簇中间模组之间安装，达到熔断器电压减半的电池簇主电路的目的；1. By moving the high-voltage box fuse outside and installing it between the middle modules of the battery cluster, the purpose of halving the fuse voltage of the main circuit of the battery cluster is achieved;
二、通过上述一的技术方案，将熔断器外移至任何电池模组之间、模组与高压箱之间的主电路；2. Through the technical solution one above, move the fuse to the main circuit between any battery modules and between the modules and the high-voltage box;
三、通过上述一的技术方案，实现改善熔断器及其带熔断器开关等器件的维修、维护。3. Through the above-mentioned technical solution, the repair and maintenance of fuses and fuse switches and other devices can be improved.
本发明具有以下有益效果：The invention has the following beneficial effects:
本发明用于提升储能电池簇功率回路效率的电路连接方法，通过减少接触器、预充回路以及高压箱，可减少电池簇高压箱内的接触器和预充电阻，从而减少连接接触器等元器件的连接点，降低了电池簇在能量传输时的连接点损耗，有助于提升整个电池簇的直流效率；The circuit connection method of the present invention is used to improve the efficiency of the power circuit of an energy storage battery cluster. By reducing contactors, precharge circuits and high-voltage boxes, it can reduce the number of contactors and precharge resistors in the high-voltage box of the battery cluster, thereby reducing the number of connecting contactors, etc. The connection points of components reduce the connection point loss of the battery cluster during energy transmission, helping to improve the DC efficiency of the entire battery cluster;
本发明因减少了接触器，解决了直流接触器在电池簇内因带载分断产生的电弧造成的安全隐患，同时将电池簇的分断由接触器改为了断路器，提升了系统使用寿命及稳定性（接触器带载分断次数只有几十或百余次，断路器的带载分断可达到上几千次的带载分断能力，其寿命远远大于接触器）；The present invention reduces the number of contactors and solves the potential safety hazard caused by the arc generated by the DC contactor in the battery cluster due to load breaking. At the same time, the disconnection of the battery cluster is changed from a contactor to a circuit breaker, which improves the service life and stability of the system. (The number of load breaking times of the contactor is only dozens or more than a hundred times, while the load breaking capacity of the circuit breaker can reach thousands of times, and its life is much longer than that of the contactor);
此外，本发明通过减少电气元器件，降低了电池簇的成本，可以在工商业小储能系统中取消高压箱的设计，进一步减低系统成本，同时充分利用储能变流器的即有器件，改善了电池→电池管理→储能变流器的主回路连接。In addition, the present invention reduces the cost of battery clusters by reducing electrical components. It can eliminate the design of high-voltage boxes in small industrial and commercial energy storage systems, further reducing system costs. At the same time, it makes full use of existing components of energy storage converters to improve Make the main circuit connection of battery → battery management → energy storage converter.
本发明用于提升储能电池簇功率回路效率的电路连接方法，通过改变熔断器的安装位置，可有效降低熔断器的电压，避免熔断器选型困难，同时解决熔断器耐压高、体积大的问题，同步解决熔断器在高压箱内的安装、维修麻烦的问题；The circuit connection method of the present invention is used to improve the efficiency of the power loop of the energy storage battery cluster. By changing the installation position of the fuse, it can effectively reduce the voltage of the fuse, avoid the difficulty of fuse selection, and at the same time solve the problem of high voltage resistance and large volume of the fuse. problems, and simultaneously solve the troublesome problems of installation and maintenance of fuses in high-voltage boxes;
本发明通过降低熔断器的电压，将熔断器从一个特殊高压器件降为普通低压器件，器件通用对降低系统成本起到积极作用。By reducing the voltage of the fuse, the present invention reduces the fuse from a special high-voltage device to an ordinary low-voltage device. The universal device plays a positive role in reducing system costs.
当然，实施本发明的任一产品并不一定需要同时达到以上所述的所有优点。Of course, any product implementing the present invention does not necessarily need to achieve all the above-mentioned advantages at the same time.
附图说明Description of the drawings
为了更清楚地说明本发明实施例的技术方案，下面将对实施例描述所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings needed to describe the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.
图1为本发明用于提升储能电池簇功率回路效率的电路连接方法操作流程图；Figure 1 is an operation flow chart of the circuit connection method used to improve the efficiency of the energy storage battery cluster power loop according to the present invention;
图2为本发明引用的现有电池簇连接示意图；Figure 2 is a schematic diagram of the connection of existing battery clusters cited in the present invention;
图3为本发明采用两级架构的工商业储能系统连接电路图；Figure 3 is a connection circuit diagram of the industrial and commercial energy storage system using a two-level architecture according to the present invention;
图4为本发明去高压箱设计后的电路连接示意图；Figure 4 is a schematic diagram of the circuit connection after the high-voltage box is removed according to the present invention;
图5为本发明实现保护电压减低的电路连接示意图；Figure 5 is a schematic diagram of circuit connections for realizing protection voltage reduction according to the present invention;
图6为本发明系统改进后的系统连接图；Figure 6 is an improved system connection diagram of the system of the present invention;
图7为本发明优化预充、接触器、高压箱后的系统连接图；Figure 7 is a system connection diagram after optimizing pre-charge, contactor and high-voltage box according to the present invention;
图8为本发明改善熔断器位置的电池系统连接图。Figure 8 is a connection diagram of a battery system with improved fuse position according to 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作出创造性劳动前提下所获得的所有其它实施例，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 some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
本发明背景中提出的现有电池簇控制机构如图2所示（图中，K1、K2、K3为接触器，LA为霍尔传感器或分流器，FU为熔断器，Q1为断路器，R为预充电阻）；为解决技术背景中的问题，请参照图1、图7、图8所示，用于提升储能电池簇功率回路效率的电路连接方法，包括如下步骤：The existing battery cluster control mechanism proposed in the background of the present invention is shown in Figure 2 (in the figure, K1, K2, K3 are contactors, LA is a Hall sensor or shunt, FU is a fuse, Q1 is a circuit breaker, R is the precharge resistor); in order to solve the problem in the technical background, please refer to Figure 1, Figure 7, and Figure 8. The circuit connection method used to improve the efficiency of the power loop of the energy storage battery cluster includes the following steps:
直流电上电时，合上直流侧断路器Q1，电池输出直流电，为系统中的BMS、EMS设备供电，PCS的直流端口具备电池供电，设备点击启动后，PCS的内部预充回路3K、4K合闸，直流电经预充电阻1R、2R限流向PCS内部支撑电容进行充电，当PCS内部接触器1K、2K两端电压一致后，合上PCS内部接触器1K、2K，再断开3K、4K完成启动过程，运行DCAC逆变/整流（充电/放电）（整流）；When the DC power supply is powered on, close the DC side circuit breaker Q1, and the battery will output DC power to supply power to the BMS and EMS equipment in the system. The DC port of the PCS is powered by the battery. After the device is clicked to start, the internal precharge circuits 3K and 4K of the PCS are closed. gate, the DC current is limited to the PCS internal support capacitor through the precharge resistors 1R and 2R to charge. When the voltages at both ends of the PCS internal contactors 1K and 2K are consistent, close the PCS internal contactors 1K and 2K, and then disconnect 3K and 4K to complete Start-up process, run DCAC inverter/rectifier (charge/discharge) (rectifier);
直流电下电时，设备点击关机后，停止DCAC逆变/整流（充电/放电），断开PCS内部接触器1K、2K，再断开断路器Q1，从而完成设备断电过程；When the DC power is off, after the device clicks to shut down, the DCAC inverter/rectifier (charge/discharge) is stopped, the PCS internal contactors 1K and 2K are disconnected, and then the circuit breaker Q1 is disconnected to complete the device power-off process;
电池系统普通故障保护，设备在正常工作时，当BMS检测到电池系统存在异常状况，经BMS判断要切断电池与逆变系统的连接时，BMS发出故障停机信号（DO输出）至断路器Q1的脱扣线圈，将断路器Q1进行断开脱扣，实现电池与逆变系统的连接断开，保护电池系统；电池系统严重故障保护，当电池系统瞬间电流超过限定电流，BMS来不及反应、断路器Q1来不及脱开时，回路中串联的熔断器FU受电流激增而温度升高熔断FU中的导体，实现电池主回路的断开连接。Battery system ordinary fault protection. When the equipment is working normally, when the BMS detects an abnormality in the battery system and the BMS determines that it is necessary to cut off the connection between the battery and the inverter system, the BMS sends a fault shutdown signal (DO output) to the circuit breaker Q1. The trip coil disconnects and trips the circuit breaker Q1 to disconnect the battery from the inverter system and protect the battery system; the battery system is protected against serious faults. When the instantaneous current of the battery system exceeds the limited current, the BMS has no time to react and the circuit breaker When Q1 has no time to disconnect, the fuse FU connected in series in the circuit is subject to a surge in current and the temperature rises and fuses the conductor in FU, thereby disconnecting the main circuit of the battery.
实施例1：Example 1:
本发明通过对电池系统的充分了解和对储能变流器的认识，发现储能系统的过度设计现象十分严重，此时需要结合电池系统和储能变流器系统优化其主电路的结构及进行不必要器件的精简，提高系统的整体稳定性和可靠性，特别是在工商业储能系统中，其BMS控制采用两级架构，高压箱输出以后，直接进入储能变流器的主回路，其连接电路图如图3所示，图中，高压箱内K1、K2、K3为接触器，LA为霍尔传感器或分流器，FU为熔断器，Q1为断路器，R为预充电阻；储能变流器中PCS为储能电流器，1K、2K、3K、4K为接触器，1R、2R为预充电阻。Through a full understanding of the battery system and the energy storage converter, the present invention found that the over-design phenomenon of the energy storage system is very serious. At this time, it is necessary to optimize the structure and structure of the main circuit of the battery system and the energy storage converter system. Streamline unnecessary devices to improve the overall stability and reliability of the system. Especially in industrial and commercial energy storage systems, the BMS control adopts a two-level architecture. After the high-voltage box output, it directly enters the main loop of the energy storage converter. The connection circuit diagram is shown in Figure 3. In the figure, K1, K2, and K3 in the high-voltage box are contactors, LA is a Hall sensor or shunt, FU is a fuse, Q1 is a circuit breaker, and R is a precharge resistor; In the energy converter, PCS is the energy storage current device, 1K, 2K, 3K, and 4K are contactors, and 1R and 2R are precharge resistors.
通过对高压箱、储能电流器内部电路了解到，高压箱内有具有接触器和预充回路，PCS内部也有接触和预充回路，两者在连接使用时，回路中出现两组接触器控制和预充回路，在系统中属于过设计、重复设计，增加了接触器的连接点，增加了线路损耗，增加了故障点；因此本发明对系统主回路优化如下几点：Through the internal circuits of the high-voltage box and energy storage current device, we learned that there are contactors and pre-charge circuits in the high-voltage box, and there are also contact and pre-charge circuits in the PCS. When the two are connected and used, two sets of contactor controls appear in the circuit. and pre-charging loop are over-designed and repetitively designed in the system, which increases the connection points of contactors, increases line losses, and increases fault points; therefore, the present invention optimizes the main loop of the system in the following points:
取消主回路中的K1、K2、K3接触器；Cancel the K1, K2 and K3 contactors in the main circuit;
取消主回路中的R预充电阻；Cancel the R precharge resistor in the main circuit;
由于高压箱的器件减少，可直接将高压箱优化掉，不需要设计高压箱；达到去高压箱的设计；如图4所示，图中，高压箱内LA为霍尔传感器或分流器，FU为熔断器，Q1为断路器，R为预充电阻；储能变流器中PCS为储能电流器，1K、2K、3K、4K为接触器，1R、2R为预充电阻。Since the number of components in the high-voltage box is reduced, the high-voltage box can be directly optimized without the need to design a high-voltage box; a design that eliminates the high-voltage box is achieved; as shown in Figure 4, in the figure, LA in the high-voltage box is a Hall sensor or shunt, and FU is the fuse, Q1 is the circuit breaker, and R is the precharge resistor; in the energy storage converter, PCS is the energy storage current device, 1K, 2K, 3K, and 4K are contactors, and 1R and 2R are precharge resistors.
实施例2：Example 2:
在电池簇系统中，储能变流器所需要的高电压由每个电池模组串联组成，将多个电池模组串联可实现上千伏电压的电池系统。在现在的高压箱中保护熔断器则选择更高电压等级的。本方案将高压箱内的熔断器移至某两个电池模组之间，可实现保护电压减低的效果；具体电路图和实现方法如图5所示；In the battery cluster system, the high voltage required by the energy storage converter is composed of each battery module connected in series. By connecting multiple battery modules in series, a battery system with a voltage of thousands of volts can be realized. In today's high-voltage boxes, protection fuses are chosen with higher voltage levels. This solution moves the fuse in the high-voltage box between two battery modules, which can achieve the effect of reducing the protective voltage; the specific circuit diagram and implementation method are shown in Figure 5;
本发明中，①、方案优化了熔断器的安装位置，将原高压箱或簇级末端的熔断器移到某两个模组之间去安装，可降低熔断器的耐压等级，从而改善因电压高而造成的选型困难，降低熔断器的成本；In the present invention, (1), the solution optimizes the installation position of the fuse. The fuse at the end of the original high-voltage box or cluster level is moved to between two modules for installation, which can reduce the withstand voltage level of the fuse, thereby improving the cause. Difficulties in selection caused by high voltage reduce the cost of fuses;
②、原高压箱或簇级末端的熔断器的熔断电压需大于簇级所有模组串联电压（标准单个模组额定电压为51.2V，最高电压58.4V），如果串联15个电池模组串联需要熔断器电压需要大于876V；如果25个电池模组串联需要熔断器电压大于1460V；②. The fusing voltage of the fuse at the end of the original high-voltage box or cluster level must be greater than the series voltage of all modules at the cluster level (the standard rated voltage of a single module is 51.2V, the maximum voltage is 58.4V). If 15 battery modules are connected in series, it is necessary The fuse voltage needs to be greater than 876V; if 25 battery modules are connected in series, the fuse voltage needs to be greater than 1460V;
③、如果将熔断器的位置移至模组之间，其耐压只需要为：模组电压*n个模组或模组电压*m-n个模组，取电压最高者，当熔断器熔断时，上端模组对地的电压最高为模组电压*n个模组（上端模组数量），下端模组对地的电压最高为模组电压*m-n个模组（下端模组数量）；例如：25个模组串联，本应选择1500V耐压等级的熔断器，此时将熔断器移至第12号模组和13号模组之间，其耐压为58.4V*13模组= 759.2V，此时选择熔断器耐压为800V或1000V的即可；③. If the fuse is moved between modules, its withstand voltage only needs to be: module voltage * n modules or module voltage * m-n modules, whichever has the highest voltage, when the fuse blows , the maximum voltage of the upper module to ground is module voltage * n modules (number of upper modules), and the maximum voltage of the lower module to ground is module voltage * m-n modules (number of lower modules); for example : 25 modules are connected in series. A fuse with a withstand voltage of 1500V should be selected. At this time, the fuse is moved between module No. 12 and module 13. Its withstand voltage is 58.4V*13 modules = 759.2 V, at this time, you can choose a fuse with a withstand voltage of 800V or 1000V;
④、系统最低电压的熔断器选型位置是位于模块正中间位置，根据实际情况可以往前或后移动位置；④. The fuse selection position with the lowest voltage in the system is located in the middle of the module. It can be moved forward or backward according to the actual situation;
通过上述2点改进后，其系统连接图如图6所示（图中，高压箱内LA为霍尔传感器或分流器，FU为熔断器，Q1为断路器，R为预充电阻；储能变流器中PCS为储能电流器，1K、2K、3K、4K为接触器，1R、2R为预充电阻）。After the above two improvements, the system connection diagram is shown in Figure 6 (in the figure, LA in the high-voltage box is a Hall sensor or shunt, FU is a fuse, Q1 is a circuit breaker, and R is a precharge resistor; energy storage In the converter, PCS is the energy storage current device, 1K, 2K, 3K, and 4K are contactors, and 1R and 2R are precharge resistors).
本发明中，随着储能技术的快速发展，越来越多的优化控制逻辑及控制方法应用于储能系统中，储能系统的直流侧效率和交流侧效率尤为关注，电池系统的稳定运行成为储能系统在考核系统可靠性的关键指标，因此本发明提出一种用于改善储能电池簇功率回路的电路连接方法，主要解决的技术问题包括：In the present invention, with the rapid development of energy storage technology, more and more optimized control logic and control methods are applied to energy storage systems. Particular attention is paid to the DC side efficiency and AC side efficiency of the energy storage system. The stable operation of the battery system It has become a key indicator for evaluating the reliability of the energy storage system. Therefore, the present invention proposes a circuit connection method for improving the power loop of the energy storage battery cluster. The main technical problems to be solved include:
①、本发明优化了电池簇高压箱的内部器件，减少了回路中的接触器、预充电阻，在必要时可取消高压箱（将元器件单独安装），较大的降低了器件成本；①. The present invention optimizes the internal components of the battery cluster high-voltage box, reduces the contactors and precharge resistors in the circuit, and can eliminate the high-voltage box (install the components separately) when necessary, greatly reducing the cost of the device;
②、本发明减少了接触器，从而减少了接触器因带载分断可能产生电弧而带来的系统安全隐患；②. The present invention reduces the number of contactors, thereby reducing the potential safety hazards of the system caused by the arc that may be generated by the contactor due to load breaking;
③、本发明通过减少元器件，并减少电池簇主回路的连接点，从而减少故障率，提升直流侧的电池效率（连接点有较大的功率损耗）；③. This invention reduces the failure rate and improves the battery efficiency on the DC side by reducing components and connection points of the main circuit of the battery cluster (the connection points have large power losses);
④、本发明通过对主回路的设计优化，使控制回路简单化，降低了电池系统的臃肿和过设计的情况。④. By optimizing the design of the main loop, the present invention simplifies the control loop and reduces the bloat and over-design of the battery system.
本发明图2、图3、图4、图5、图6、图7、图8中，1#BMU、N#BMU为1#电池控制管理器、N#为电池控制管理器。In Figures 2, 3, 4, 5, 6, 7 and 8 of the present invention, 1#BMU and N#BMU are the 1# battery control manager, and N# is the battery control manager.
在本说明书的描述中，参考术语“一个实施例”、“示例”、“具体示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the description of this specification, reference to the terms "one embodiment," "example," "specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one aspect of the invention. in an embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
以上公开的本发明优选实施例只是用于帮助阐述本发明。优选实施例并没有详尽叙述所有的细节，也不限制该发明仅为的具体实施方式。显然，根据本说明书的内容，可作很多的修改和变化。本说明书选取并具体描述这些实施例，是为了更好地解释本发明的原理和实际应用，从而使所属技术领域技术人员能很好地理解和利用本发明。本发明仅受权利要求书及其全部范围和等效物的限制。The preferred embodiments of the invention disclosed above are only intended to help illustrate the invention. The preferred embodiments do not describe all details, nor do they limit the invention to specific implementations. Obviously, many modifications and variations are possible in light of the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention. The invention is limited only by the claims and their full scope and equivalents.
| Application Number | Priority Date | Filing Date | Title |
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| CN202311092414.7ACN116826931A (en) | 2023-08-29 | 2023-08-29 | A circuit connection method for improving the efficiency of the power loop of energy storage battery clusters |
| CN202421453704.XUCN223039666U (en) | 2023-08-15 | 2024-06-24 | Circuit for improving efficiency of power loop of energy storage battery cluster |
| Application Number | Priority Date | Filing Date | Title |
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| CN202311092414.7ACN116826931A (en) | 2023-08-29 | 2023-08-29 | A circuit connection method for improving the efficiency of the power loop of energy storage battery clusters |
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| CN202311092414.7APendingCN116826931A (en) | 2023-08-15 | 2023-08-29 | A circuit connection method for improving the efficiency of the power loop of energy storage battery clusters |
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| CN107069976A (en)* | 2017-05-11 | 2017-08-18 | 沃太能源南通有限公司 | A kind of expansible group string data large-scale energy storage system |
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| CN106451610A (en)* | 2016-09-09 | 2017-02-22 | 深圳市科陆电子科技股份有限公司 | Energy storage battery cluster control system and control method thereof |
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